CN102500893A - Welding equipment and use method thereof - Google Patents

Abstract

The invention relates to the field of welding, in particular to welding equipment of a nuclear power station main loop, and a use method of the welding equipment. In order to solve the welding quality problem and the problem of high cost, the welding equipment is provided and comprises two welding torches: a flat welding torch and a standard welding torch; when a deep part of a welding seam is welded, the flat welding torch is used for welding, and when a shallow part of the welding seam is welded, the standard welding is used for welding; the flat welding torch comprises an insulating case, a welding torch base body, a middle insulator, a lower gun body and an electrode assembly which sequentially penetrates through the components, and a channel for cooling water circulation and a channel through which a protective gas can pass are arranged inside the welding torch basal body and the middle insulator and the upper part of the lower gun body; and the lower gun body is in a hollow flat shape except a connecting part of the lower gun body, and an insulating pipe through which an electrode can pass, and a gas strainer capable of allowing the protective gas to be advected are arranged inside the flat structure. The welding equipment both improves the welding quality and saves the cost.

Description

Welding equipment and method for using thereof

Technical field

The present invention relates to welding field, especially relate to the welding equipment and the method for using thereof that are used for the narrow gap auto welding of PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION.

Background technology

The narrow gap auto welding of PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION is that nuclear power station is installed the key technology in the work progress.The pipeline wall thickness of this welding is usually between 60～100mm, because the contraction weld seam in the welding process is usually between 6～10mm.The heat input is moderate during in view of welding, welding efficiency is high, and is suitable for all-position welding, so install in the work progress at nuclear power station, narrow gap auto welding obtains wideling popularize application.

Yet there are some technical barriers in the narrow gap auto welding of existing PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION.For example, the adjusting problem of gas flow, the cooling problem of welding torch, and the coupling of welding equipment and peripheral environment and adjustment.These technical problems all are to be worth those skilled in the art to go further research.

In order to address the above problem, those skilled in the art has proposed multiple solution from the aspect that changes welding torch.

First kind, welding equipment adopts gas outer protection welding torch.In this welding equipment, to adopt tungsten electrode to go deep into weld seam and implement welding, gas shield covers on the outside and protects.The gas shield cover generally adopts pyroceram.Yet also there are defective in this welding equipment or welding method, and defective is that protective gas can't closely be protected the molten bath, thereby cause welding quality unstable; And owing to be outside distance protection molten bath, so the gas flow that needs will be big more a lot of than what closely protect.Gas usage is big, and cost is very high; And welding process is subject to the influence of extraneous gas disturbance.

Second kind, welding equipment adopts flat welding torch, and this welding torch is to make narrow flat to the bottom of welding torch, and thickness is less, can closely protect the molten bath in the deep enough narrow gap weld seam.The shortcoming of this welding torch is: 1, in order to play the protection effect, flat welding torch is generally all done longly on circumferential direction, so it is inconvenient in welding process, to observe the molten bath, is unfavorable for operating personnel's adjustment; 2, owing to need go deep into the weld seam welding, flat torch height is general bigger, and about 70～80mm, but when being welded to face of weld, the space that needs is just bigger, is unfavorable for the welding of nuclear power field conduct; 3, this welding torch must adopt water-cooling pattern to cool off, but water-cooling pattern often divides the protection of tungsten electrode for front and back two parts, and gas circuit is more complicated comparatively speaking.

The third is that the narrow gap welding by the research and development of French FRAMATOME company connects equipment, sees european patent document EP0870567A1.This equipment adopts flat welding torch; And along with certain level is filled and led up in the gap, with original long, be that the gas hood of large-size replaces to middle-sized gas hood; Along with the gap is is upwards filled and led up more, replace middle-sized gas hood with the gas hood of shorter size again.In whole welding process, need at least three gas hoods of replacement, very loaded down with trivial details.In addition, except the replacement gas hood, also must change electroded electrode holder gripping member simultaneously, this electrode holder gripping member is the assembly that is made up of housing, connection knob and electrode securing member at every turn, and therefore replacement is got up also quite complicated.

In addition, this welding equipment of French FRAMATOME company development does not provide concrete solution to the cooling problem of flat welding torch bottom rifle body yet.

Seeing that PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION is very high to the welding quality requirement, and above-described three kinds of welding equipments or welding method all can be brought many problems to welding quality, and therefore being necessary to develop a kind of new welding equipment improves welding quality.

Summary of the invention

For solving the problems of welded quality that above-mentioned welding equipment brings, the present invention proposes a kind of new welding equipment, and this welding equipment comprises two kinds of welding torches: flat welding torch and standard welding torch; When welded in the deep of butt welded seam, said welding equipment adopted said flat welding torch to weld, and when the superficial part to said weld seam welded, said welding equipment adopted said standard welding torch to weld;

Said flat welding torch comprises insulation crust, welding torch matrix, flat welding torch middle part insulator, flat welding torch bottom rifle body and runs through the electrode assemblie of above-mentioned parts successively; The said welding torch matrix of said insulation crust jacket, advance/delivery port joint and air inlet connections pass said insulation crust and said welding torch matrix is connected; One end face of said flat welding torch middle part insulator is connected with said welding torch matrix, and the other end is connected with the connecting portion of said flat welding torch bottom rifle body; Be provided with the path that is used for the cooling water circulation and be used for the path that protective gas passes through in the inside of said welding torch matrix and flat welding torch middle part insulator and the top of said flat welding torch bottom rifle body; Said flat welding torch bottom rifle body is the flat of hollow except that connecting portion, have in the set inside of this flat structure and hold insulation tube that electrode passes through and the gas filtration net that makes the protective gas advectionization;

Said standard welding torch comprises insulation crust, welding torch matrix, standard welding torch middle part insulator, gas shield cover and runs through the electrode assemblie of above-mentioned parts successively; The said welding torch matrix of said insulation crust jacket, advance/delivery port joint and air inlet connections pass said insulation crust and said welding torch matrix is connected; Said standard welding torch middle part insulator comprises upper and lower two parts, and top is connected with said welding torch matrix, and the lower part is connected with said gas shield cover; Be provided with the path that is used for the cooling water circulation and be used for the path that protective gas passes through in the inside of said welding torch matrix and the top of said standard welding torch middle part insulator; In the lower part of said standard welding torch middle part insulator, be provided with the gas filtration net.

Preferably, when weld penetration >=25～30mm, adopt flat welding torch to weld; When weld penetration＜25～30mm, adopt the standard welding torch to weld.

More preferably, when weld penetration >=25mm, adopt flat welding torch to weld; When weld penetration＜25mm, adopt the standard welding torch to weld.

According to foregoing invention, when the deep of welded seam, for example during the depth of weld >=25mm; Adopt flat welding torch, welding torch can stretch into weld seam, and the molten bath is closely protected; The probability that makes weld defect occur reduces greatly, has guaranteed welding quality, and the probability that its pore produces reduces; Simultaneously, the gas flow that this welding torch needs is 1/8 of an existing gas outer protection welding torch, and about 10L/min has reduced the demand of protective gas greatly, has saved great amount of cost, has also improved environmental benefit.In the time of weld penetration＜25mm, adopt the standard welding gun, reduced the space requirement of welding, guarantee small space smooth construction at nuclear island.In addition, this invention can be well compatible with existing equipment, realizes seamless link fully.When guaranteeing the cooling welding torch, can also cool off equipment such as camera on the existing equipment, wire feeding motor.

Preferably, the said path that is used for cooling water circulation is in the inside of said welding torch matrix and flat welding torch middle part insulator and the top of the inside of the top of said flat welding torch bottom rifle body or welding torch matrix and said standard welding torch middle part insulator drills through the hole of offering that is communicated with successively and forms.Such path was both economical, can form repeatedly circulation again, had cooled off welding torch greatly.

Preferably, said flat welding torch bottom rifle body is the structure that the cross section is a T-shape, and the vertical portion of the structure of this T-shape divides formation box-packed body, and the inside of this box-packed body sets gradually a plurality of gas filtration nets from top to bottom, and the thickness of this box-packed body is 7.5～8.5mm.The multi-layer gas screen pack is set, can on the basis of using limited protective gas, forms and protect the gas field stably.

Further preferably, be the rectangular plate shape structure at the gas filtration net of the set inside of said box-packed body, on this platy structure, be evenly equipped with many exhausting holes.It is very important to be evenly equipped with through hole, improves the advectionization of protective gas like this.

Further preferably, the thickness of this box-packed body is 8mm.Adopt so flat welding torch to be deep in the weld seam and weld, be particularly suitable for the welding of PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipeline.

Preferably, said standard welding torch also comprises the standard welding torch connector of being made by metal material, and this standard welding torch connector is a cylinder-like structure; The upper end of this cylinder-like structure is communicated with said welding torch matrix, and the lower end connects the gas filtration net, and after installing, the gas filtration network capacity that this standard welding torch connector and lower end thereof connect is contained in upper and lower two parts of standard welding torch middle part insulator.This connector is set, both can be used for flat welding torch in the welding torch matrix be connected smoothly, the convenient again gas filtration net that connects also is convenient to the heat radiation of standard welding torch.

Preferably, said welding torch matrix, advance/manufacturing materials of delivery port joint and air inlet connections and flat welding torch bottom rifle body is a red copper; The manufacturing materials of said insulation crust, flat welding torch middle part insulator and standard welding torch middle part insulator is a polysulfones.Adopt red copper as material, both improved electric conductivity, machining property, also improved thermal diffusivity.Select polysulfones as insulating materials, under the situation that guarantees insulating properties, improve heat-resisting quantity, intensity and machining property greatly.

The present invention also provides the method for using of above-mentioned welding equipment; A kind of mode is, and is when being welded to the superficial part of weld seam, whole with the said flat welding torch of the whole directly replacement of said standard welding torch; Another kind of mode is, when being welded to the superficial part of weld seam, keeps insulation crust, welding torch matrix and electrode assemblie in the said flat welding torch, and other parts in the said flat welding torch are replaced by the part below the welding torch matrix in the said standard welding torch.

Description of drawings

Fig. 1 is the perspective exploded view according to the standard welding torch of welding equipment of the present invention;

Fig. 2 is the perspective exploded view according to the flat welding torch of welding equipment of the present invention;

Fig. 3 is that the master according to the total parts welding torch matrix of the standard welding torch of welding equipment of the present invention and flat welding torch looks sketch map;

Fig. 4 is the schematic perspective view according to the middle part insulator of the flat welding torch of welding equipment of the present invention;

Fig. 5 is that the master according to the bottom rifle body matrix of the flat welding torch of welding equipment of the present invention looks sketch map;

Fig. 6 is that the master according to the bottom rifle body cover plate of the flat welding torch of welding equipment of the present invention looks sketch map;

Fig. 7 is the schematic top plan view of the gas filtration net that is provided with in the bottom rifle body according to the flat welding torch of welding equipment of the present invention;

Fig. 8 is the schematic perspective view according to the middle part insulator of the standard welding torch of welding equipment of the present invention;

Fig. 9 is that the master according to the standard welding torch connector of welding equipment of the present invention looks sketch map;

Figure 10 is the schematic perspective view according to the gas filtration net of the standard welding torch of welding equipment of the present invention.

The specific embodiment

Welding equipment of the present invention is furnished with two kinds of welding torches, standard welding torch promptly as shown in Figure 1 and flat welding torch as shown in Figure 2.When weld seam is dark, adopt flat welding torch earlier, i.e. welding equipment installation flat welding torch as shown in Figure 2 welds; After weld seam arrives certain altitude, when promptly weld seam is more shallow, changes standard welding torch as shown in Figure 1 again and then weld, finish until welding.To the narrower workplace of weld seam, especially concerning PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION, through great amount of calculation and evidence, the inventor finds when weld penetration >=25～30mm, to adopt flat welding gun that welding is closely protected in the molten bath; Along with weld seam is constantly filled, when weld penetration＜25～30mm, the standard welding torch of changing into welds.This welding equipment or welding method both can guarantee that protective atmosphere was good, had saved air consumption again greatly, also can not interfere with peripheral working environment.Preferably, when weld penetration＜25mm, change.

As shown in Figure 1, the standard welding torch comprisesinsulation crust 1,welding torch matrix 2, theair inlet connections 3 that is threaded with the holes onwelding torch matrix 2 surfaces andwater inlet joint 4 anddelivery port joint 5, standard welding torch middle part insulator 6,gas shield cover 7, standard welding torchgas screen pack 8, standard welding torch connector 9, carry the electrode holder (not shown) of electrode and compress thegland 10 of electrode holder.Saidinsulation crust 1 is wrapped on thewelding torch matrix 1, and the hole thatair inlet connections 3,water inlet joint 4 anddelivery port joint 5 pass on theinsulation crust 1 is threaded with hole on the welding torch matrix 1.It belowwelding torch matrix 2 standard welding torch middle part insulator 6; The lower surface ofwelding torch matrix 2 is provided with tapped blind hole; And correspondence is provided with tapped through hole on the cuboid joint face of standard welding torch middle part insulator 6, and insulator 6 is connected through bolt and fixes in the middle part of saidwelding torch matrix 2 and the standard welding torch.

Further, can find out in conjunction with Fig. 3 and Fig. 8 to Figure 10 thatwelding torch matrix 2 lower surfaces are provided with outer threaded hollow connectingportion 22, the bottom of standard welding gun middle part insulator 6 is provided with cylindrical body.Standard welding torch connector 9 also is a cylindrical body, and the both ends up and down of the endoporus of this cylindrical body all are provided with internal thread; The internal thread of upper end is connected with the external screw thread of hollow connectingportion 22 and seals with O type circle; The internal thread of bottom is connected with the external screw thread of the tubular connecting portion of standard welding torchgas screen pack 8 shown in Figure 10 and seals with O type circle.Afterwelding torch matrix 2 and standard welding torch middle part insulator 6 was connected through bolt, standard welding torch connector 9 passed the cylindrical body of insulator 6 bottoms in the middle part of the standard welding torch and the standard welding torchgas filter screen 8 that will be threaded with its bottom is deep into the top of gas shield cover 7.The top ofgas shield cover 7 is connected with the lower thread of standard welding torch middle part insulator.

After connection finishes; Electrode holder carry electrode (current stage is a tungsten electrode) pass on theinsulation crust 1 corresponding to behind the hole in thehole 21 ofwelding torch matrix 2, the centre bore of endoporus and standard welding torchgas screen pack 8 of hole, standard welding torch connector 9 ofhole 21 and hollow connectingportion 22 on thewelding torch matrix 2, finally lean out gas shield cover 7.Then,gland 10 compresses electrode holder.

Like Fig. 1, Fig. 3 and shown in Figure 8, cooling water gets into thehole 27 ofwelding torch matrixes 2 throughwater inlet joint 4, and a part of then cooling water flows outwelding torch matrixes 2 throughhole 28 and removes to cool off other equipment, like the motor of camera etc.; Another part cooling water enters into thehole 51 of standard welding torch middle part insulator 6 viapath 29, throughhole 51inlet passages 55, loops back weldingtorch matrix 2 again throughhole 52 subsequently then, then gets intodelivery port joints 5 back reflow tanks throughpath 24 and 23 successively.

For protective gas, like Fig. 1, Fig. 3 and shown in Figure 8, protective gas gets intowelding torch matrix 2 throughair inlet connections 3, and the hole via path in thewelding torch matrix 2 25,26,21 and hollow connectingportion 22 gets intocavity 53 then.Protective gas is through behind the standard welding torchgas screen pack 8, and air-flow becomes steadily, has avoided turbulent flow, and then gets intogas shield cover 7, and the molten bath is evenly protected.

Fairly simple because of the cooling water path of standard welding torch middle part insulator 6, so conduct the heat that welding produces, cool off these heats throughwelding torch matrix 2 then through standard welding torch connector 9.Consider the problem of cooling heat conduction,welding torch matrix 2,air inlet connections 3 andwater inlet joint 4 anddelivery port joint 5, standard welding torch connector 9 all adopt metal material to process, and consider factors such as machining intensity and conduction again, preferred red copper.Consider Insulation Problems,insulation crust 1 adopts insulating materials such as plastic material manufacturing, preferred polysulfones with standard welding torch middle part insulator 6.

As shown in Figure 2, flat welding torch comprisesinsulation crust 1,welding torch matrix 2, theair inlet connections 3 that is threaded with the hole onwelding torch matrix 2 surfaces andwater inlet joint 4 anddelivery port joint 5, flat welding torchmiddle part insulator 11, flat welding torchbottom rifle body 12, the electrode holder (not shown) of holding electrode and thegland 10 that compresses electrode holder.Flat welding torchbottom rifle body 12 comprises bottomrifle body matrix 13 and the bottom riflebody cover plate 15 that cooperates with it; In the box-packed body that bottomrifle body matrix 13 and bottom riflebody cover plate 15 form, be provided with a plurality of flat welding torchgas screen pack 14 andearthenwares 16 that are parallel to each other, the bottom of electrode (tungsten electrode) is passed this earthenware 16 and is exposedbottom rifle body 12.

In when assembling,earlier insulation crust 1 cover is set on thewelding torch matrix 2, the hole thatair inlet connections 3,water inlet joint 4 anddelivery port joint 5 pass on theinsulation crust 1 is threaded with hole on thewelding torch matrix 2, to be communicated with the protection gas and the cooling water of outside.Then, four flat welding torchgas screen packs 14 are planted on the bottomrifle body matrix 13, and bottom riflebody cover plate 15 is fixed on the bottomrifle body matrix 13 through hexagon socket head cap screw.Subsequently, thebottom rifle body 12 that assembles is connected to its end face on theinsulator 11 of flat welding torch middle part through bolt, adopts O type circle to come seal protection gas passage interface and cooling water path interface between them.After accomplishing above-mentioned assembling, again earthenware 16 is inserted in the flat welding torchbottom rifle body 12 from top to down.Because with the centre bore interference fit of a plurality of flat welding torchgas screen packs 14, so earthenware 16 can be stuck in the rifle body of bottom securely., said modules is connected on thewelding torch matrix 2 through four interior hexagonals thereupon, adopts O type circle to come the sealing waterway interface between them.At last, long tungsten electrode is insertedearthenware 16 through the tungsten electrode folder,pressure cap 10 compresses.

When carrying out the design of flat welding torch, the appearance and size of flat welding torch is the difficult point place of design.In order closely to protect the molten bath, must make welding torch go deep into weld seam, but the width of weld seam is very little in the welding of PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION, for example some weld width is less than 10mm.Therefore, consider width, the amount of contraction in the welding process of weld seam and the tungsten electrode that is held, after the several times test, the thickness ofbottom rifle body 12 is preferably designed for 7.5～8.5mm, and the best is 8mm.

Consider the compatibility with existing welding equipment, the about 30～32mm of the width of insulation crust, the about 65～72mm of length, andthickness 45～54mm; Receive the restriction of insulation crust, the length and width height ofwelding torch matrix 2 is respectively than the little 3～5mm of insulation crust.Flat welding torchmiddle part insulator 11 is for the bottom rifle body with flat welding torch separates reaching the purpose of insulation, its thickness between 30～42mm, the about 64mm of length.Flat welding torchgas screen pack 14 is keys of gas current stabilization, and is in the present embodiment, as shown in Figure 7; Adopt 304 corrosion resistant plates of length: 47mm, width: 6.8～7.0mm, thickness: 1mm; On its plate, adopt and bore 3 rounds, 24 of every rows, the hole is of a size of 0.5～0.8mm.In order to make protective gas steadily protect the molten bath equably, the hole on the flat welding torchgas screen pack 14 will be enough greatly to avoid obstruction; And the hole will evenly distribute; At last, the preferred arrangements multilayer, after repeatedly regulating, make protective gas form the advection field.The effect of earthenware 16 is insulation tungsten electrode and flat welding torch bottom rifle body, and preferably adopting internal diameter is the refractory ceramics making of 3.3mm; Can certainly adopt other insulating materials.

In the design of flat welding torch, another difficult point is the cooling problem.Because flat welding torch is to go deep into weld seam to implement welding, the radiations heat energy of electric arc basically all can't shed in weld seam, so the cooling problem of flat welding torch is particularly important.Flat welding torch of the present invention solves this problem through two approach.At first,bottom rifle body 12 selects red copper as rapidoprint, and red copper not only has good thermal conductivity, and also has the favorable mechanical processing characteristics, in welding process, also can not pollute weld seam simultaneously.Secondly, select cooling water to cool off.Particularly, referring to Fig. 2 to Fig. 5, cooling water gets intowelding torch matrix 2 throughwater inlet joint 4; Via back, the hole in thewelding torch matrix 2 27 separated into two parts, a part flows outwelding torch matrixes 2 throughhole 28 and cools off other equipment then, like the motor of camera etc.; Another part directly gets into flat welding torchmiddle part insulator 11 via path 29.Get intomiddle part insulator 11 from the cooling water ofpath 29 via interface 31.Then, via path 32 inlet passages 33, again through outlet 34 entering bottom rifle body matrixes 13.After cooling water got into bottomrifle body matrix 13, viapath 41,45back inlet passages 42, cooling water got intomiddle part insulator 11 again frompath 42 then.Cooling water gets into through the path 35 ofmiddle part insulator 11, arrives interface 39 places via path 38 then, thereupon through interface 39 entering bottom rifle body matrixes 13.The cooling water that gets into bottomrifle body matrix 13 is got back to flat welding torchmiddle part insulator 11 again viapath 43,46 and 44, has so just accomplished the cooling to flat welding torch bottom rifle body.At last, cooling water is circulated back in thewelding torch matrix 2 through path 61.Via path on thewelding torch matrix 2 23 anddelivery port joint 5 reflow tanks, accomplish the whole circulation cooling procedure then.

In flat welding torch, protective gas gets intowelding torch matrix 2 throughair inlet connections 3, then via 25inlet passages 26 of the path in thewelding torch matrix 2, then gets intoair cavity 21 throughpath 26, gets into flat welding torchmiddle part insulator 11 through the pore on the hollow connectingportion 22 again.After protective gas gets into flat welding torchmiddle part insulator 11,,,, form protective atmosphere then through a plurality of flat welding torchgas screen packs 14 through interface 63 enteringbottom welding guns 12 via air cavity 62.

Show and to know by above-mentioned explanation and accompanying drawing, form cooling water and protective gas path through the hole that is communicated with successively that processes in the inside on welding torch matrix, middle part insulator and rifle body top, bottom.For from external process, a plurality of openings have been formed on the surface of these parts; According to design demand, a lot of openings only are fabrication holes, and in order to form complete loop or path, these fabrication holes must be by shutoff.

Because flat welding torch bottom rifle body is kept away unavoidable the contact with the tube wall of major loop to be welded, if so tungsten electrode and bottom rifle body on-insulated, the rifle body will with the sidewall starting the arc, can't guarantee welding quality.For addressing this problem, between tungsten electrode and bottom rifle body, adopt resistant to elevated temperatures earthenware to insulate.In addition, the welding torch matrix is the main body of conduction, and if it directly is connected with bottom rifle body, also have sidewall starting the arc phenomenon, so between two, separate throughinsulator 11 in the middle part of designing.So just can guarantee the charged anything but of bottom rifle body.

For the material chosen problem,insulation crust 1 adopts resistant to elevated temperatures insulating materials, materials such as preferred polysulfones, tetrachloro-ethylene with flat welding torch middle part insulator 11.Welding torch matrix, water inlet joint, delivery port joint and air inlet connections, and bottom rifle body matrix and cover plate, preferred red copper prepares.Reason is that red copper not only has favorable mechanical processing intensity, and also has favorable conductive and thermal conductivity.

In the actual welding process, for example in welding PIPING OF MAIN LOOPS IN NUCLEAR POWER STATION pipeline process, just begun to adopt flat welding torch as shown in Figure 2 to weld; When weld penetration＜25～30mm; Preferably＜and during 25mm, directly welding torch shown in Figure 2 is pulled down, change standard welding torch shown in Figure 1 and weld.Also can only pull down the sub-assembly that thebottom rifle body 12 ofmiddle part insulator 11 and its underpart in the flat welding torch constitutes, install the sub-assembly that the standard welding torch connector 9 shown in Fig. 1, standard welding gun middle part insulator 6, standard welding torchgas screen pack 8 andgas shield cover 7 constitute then.All can install in advance in view of these two kinds of sub-assemblies, and can directly connect after the replacement and be fixed on the welding torch matrix, so that replacement is got up is very convenient through bolt.

Under thinking of the present invention instructed, those skilled in the art can change the structure of standard welding torch and flat welding torch or change.

Claims (11)

1. a welding equipment is characterized in that, this welding equipment comprises two kinds of welding torches: flat welding torch and standard welding torch; When welded in the deep of butt welded seam, said welding equipment adopted said flat welding torch to weld, and when the superficial part to said weld seam welded, said welding equipment adopted said standard welding torch to weld;

Said flat welding torch comprises insulation crust, welding torch matrix, flat welding torch middle part insulator, flat welding torch bottom rifle body and runs through the electrode assemblie of above-mentioned parts successively; The said welding torch matrix of said insulation crust jacket, advance/delivery port joint and air inlet connections pass said insulation crust and said welding torch matrix is connected; One end face of said flat welding torch middle part insulator is connected with said welding torch matrix, and the other end is connected with the connecting portion of said flat welding torch bottom rifle body; Be provided with the path that is used for the cooling water circulation and be used for the path that protective gas passes through in the inside of said welding torch matrix and flat welding torch middle part insulator and the top of said flat welding torch bottom rifle body; Said flat welding torch bottom rifle body is the flat of hollow except that connecting portion, have in the set inside of this flat structure and hold insulation tube that electrode passes through and the gas filtration net that makes the protective gas advectionization;

Said standard welding torch comprises insulation crust, welding torch matrix, standard welding torch middle part insulator, gas shield cover and runs through the electrode assemblie of above-mentioned parts successively; The said welding torch matrix of said insulation crust jacket, advance/delivery port joint and air inlet connections pass said insulation crust and said welding torch matrix is connected; Said standard welding torch middle part insulator comprises upper and lower two parts, and top is connected with said welding torch matrix, and the lower part is connected with said gas shield cover; Be provided with the path that is used for the cooling water circulation and be used for the path that protective gas passes through in the inside of said welding torch matrix and the top of said standard welding torch middle part insulator; In the lower part of said standard welding torch middle part insulator, be provided with the gas filtration net.

2. welding equipment according to claim 1 is characterized in that, when weld penetration >=25～30mm, adopts flat welding torch to weld; When weld penetration＜25～30mm, adopt the standard welding torch to weld.

3. welding equipment according to claim 2 is characterized in that, when weld penetration >=25mm, adopts flat welding torch to weld; When weld penetration＜25mm, adopt the standard welding torch to weld.

4. according to any described welding equipment in the claim 1 to 3; It is characterized in that the said path that is used for the cooling water circulation is to drill through the hole of offering that is communicated with successively on the top of the inside of the top of the inside of said welding torch matrix and flat welding torch middle part insulator and said flat welding torch bottom rifle body or welding torch matrix and said standard welding torch middle part insulator to form.

5. according to any described welding equipment in the claim 1 to 3; It is characterized in that; Said flat welding torch bottom rifle body is the structure that the cross section is a T-shape; The vertical portion of the structure of this T-shape divides formation box-packed body, and the inside of this box-packed body sets gradually a plurality of gas filtration nets from top to bottom, and the thickness of this box-packed body is 7.5～8.5mm.

6. welding equipment according to claim 5 is characterized in that, is the rectangular plate shape structure at the gas filtration net of the set inside of said box-packed body, on this platy structure, is evenly equipped with many exhausting holes.

7. welding equipment according to claim 5 is characterized in that, the thickness of this box-packed body is 8mm.

8. according to any described welding equipment in the claim 1 to 3, it is characterized in that said standard welding torch also comprises the standard welding torch connector of being made by metal material, this standard welding torch connector is a cylinder-like structure; The upper end of this cylinder-like structure is communicated with said welding torch matrix, and the lower end connects the gas filtration net, and after installing, the gas filtration network capacity that this standard welding torch connector and lower end thereof connect is contained in upper and lower two parts of standard welding torch middle part insulator.

9. according to any described welding equipment in the claim 1 to 3, it is characterized in that the manufacturing materials of said welding torch matrix, advance/delivery port joint and air inlet connections and flat welding torch bottom rifle body is a red copper; The manufacturing materials of said insulation crust, flat welding torch middle part insulator and standard welding torch middle part insulator is a polysulfones.

10. according to the method for using of any described welding equipment in the claim 1 to 9; It is characterized in that, when being welded to the superficial part of weld seam, whole with the said flat welding torch of the whole directly replacement of said standard welding torch.

11. method for using according to any described welding equipment in the claim 1 to 9; It is characterized in that when being welded to the superficial part of weld seam, keep insulation crust, welding torch matrix and electrode assemblie in the said flat welding torch, other parts in the said flat welding torch are replaced by the part below the welding torch matrix in the said standard welding torch.

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