CN103162041A - Female joint - Google Patents

Abstract

The invention provides a female joint which is capable of bearing high pressure, simple in structure and convenient and fast to operate in butt joint. The female joint comprises a female valve body which is provided with a fluid channel. A core sleeve is arranged inside the fluid channel. One end of a core shaft fixes a chock plug, and the other end of the core shaft penetrates through the core sleeve. A sliding sleeve is sleeved on the core shaft. An elastic element is arranged between the sliding sleeve and the female valve body or the core sleeve. The elastic element enables the sliding sleeve and the chock plug to contact in a sealing mode, and the core shaft and the core sleeve to contact in a sealing mode.

Description

Female joint

Technical field

Present technique relates to a kind of joint, specifically, is the female joint in a kind of high-voltage high-speed oil connection.

Background technique

Generally for the flexible pipe joint, it generally comprises tool joint pin and female joint in rapid pipe joint.During use, tool joint pin is docked with female joint and get final product.But general tool joint pin dock with female joint complete after, could pass into fluid to pipeline (being generally flexible pipe).In tool joint pin with before female joint is docked, can not pressure-bearing due to tool joint pin or female joint, pipeline can not pass into fluid.In addition, existing rapid pipe joint, the internal structure more complicated of tool joint pin and female joint, the complex operation that tool joint pin makes tool joint pin communicate with the female joint internal channel when docking with female joint, closing speed is slow.The 3rd, existing rapid pipe joint sealing effect is bad, easily causes fluid leakage.

Summary of the invention

The purpose of present technique be to provide a kind of can be bearing elevated pressures, simple in structure, female joint convenient to operation during docking.

This female joint comprises the main-valve body with fluid passage; One end of fluid passage is used for being connected with fluid circuit, and the other end is used for inserting tool joint pin; Be provided with the core retainer plate that has center hole in the fluid passage, be provided with the core retainer plate conical seal (contact) face on the core retainer plate end face relative with fluid passage one end that is connected with fluid circuit; One end of mandrel is fixing silently, the other end of mandrel passes the core retainer plate center hole and be provided with the mandrel conical seal (contact) face that contacts with the sealing of core retainer plate conical seal (contact) face; Periphery silently has silently conical seal (contact) face; Sliding sleeve is sleeved on mandrel and can endwisely slipping along mandrel; One end of sliding sleeve has the sliding sleeve conical seal (contact) face that contacts with the sealing of conical seal (contact) face silently; Be provided with elastic element between sliding sleeve and main-valve body or core retainer plate, this elastic element make simultaneously when normality sliding sleeve with silently seal contact, the sealing of mandrel and core retainer plate contacts.

Present technique is beneficial effect: this female joint can be born elevated pressures, that is to say, when female joint was connected with fluid circuit, when having elevated pressures in fluid circuit, female joint can not leaked.Because making the mandrel conical seal (contact) face, the elastic element in female joint contacts with the core retainer plate conical seal (contact) face; And the core retainer plate conical seal (contact) face is relative with fluid passage one end that is connected with fluid circuit, and the pressure of fluid circuit inner fluid also makes the mandrel conical seal (contact) face contact with the core retainer plate conical seal (contact) face; Can say, the fluid circuit internal pressure is larger, and the sealing effect of mandrel and core retainer plate is better.

Above-mentioned female joint is provided with limited step in the fluid passage, when mandrel moved a certain distance along the mandrel axis, the limit dais terrace contacted with relative mandrel end.Owing to being provided with limited step in the fluid passage, when (the public valve body of tool joint pin) promotes mandrel along mandrel axis displacement distance certain distance, the limit dais terrace contacts with relative mandrel end, makes mandrel be in a stable position.

Above-mentioned female joint, sliding sleeve comprise the polyurethane sleeve that periphery contacts with the fluid passage inner wall sealing and the vexed cover that arranges in the endoporus of polyurethane sleeve, described sliding sleeve conical seal (contact) face is arranged on vexed cover one end.Sliding sleeve contacts with the fluid passage inwall by polyurethane sleeve because will axially move with respect to the main-valve body along mandrel, can either reduce the frictional force of polyurethane sleeve and fluid passage, and can make again between polyurethane sleeve and fluid passage inwall has sealing effect preferably.Preferably, be provided with the o RunddichtringO on polyurethane sleeve one end face.Like this, when tool joint pin with after the main-valve body docks, the polyurethane sleeve end face is with after the public valve body end face of tool joint pin in inserting the fluid passage docks, also formed sealing effect preferably between contacted public valve body end face and polyurethane sleeve end face, prevented that fluid from leaking outside between contacted public valve body end face and polyurethane sleeve end face.Best, another end of polyurethane sleeve is connected with the y-type seal ring that periphery contacts with the fluid passage inwall.Further prevented the clearance leakage of fluid between y-type seal ring and fluid passage inwall by y-type seal ring.

In order to make mandrel conical seal (contact) face and core retainer plate conical seal (contact) face reliable sealing, above-mentioned female joint is provided with the seal ring that contacts for the core retainer plate conical seal (contact) face on mandrel.

Above-mentioned female joint, described main-valve body comprises main valve body and auxiliary valve body, main valve body and auxiliary valve body respectively have the fluid passage that communicates; One end periphery of auxiliary valve body is connected with step hole in the main valve body fluid passage by screw thread; Core retainer plate is between the end of the step surface of step hole and auxiliary valve body.This split type main-valve body structure is convenient to produce, and has reduced the preparation difficulty.One end of the fluid passage of main valve body is used for being connected with fluid circuit, seals by o type circle between core retainer plate and step surface.So just guarantee the sealing of core retainer plate and main valve body, prevented fluid leakage.

Description of drawings

Fig. 1 is the schematic diagram of female joint.

Fig. 2 is the stereogram of mandrel.

Fig. 3 is the schematic diagram of tool joint pin.

Fig. 4 is the stereogram of spool.

Fig. 5 is the schematic diagram of rapid pipe joint.

Embodiment

Referring to Fig. 5, this rapid pipe joint, it comprises be connected afemale joint 100 and atool joint pin 200.

Female joint 100 shown in Figure 1,main valve body 1 andauxiliary valve body 2 respectively have thefluid passage 11,21 that communicates; The right-hand member of the fluid passage of main valve body is used for being connected with fluid circuit.The left end of the fluid passage of auxiliary valve body is used for inserting tool joint pin 100.The right-hand member periphery ofauxiliary valve body 2 is connected withstep hole 12 in the main valve body fluid passage byscrew thread 22; Thecore retainer plate 3 that has a center hole between the end of the step surface of step hole and auxiliary valve body, betweencore retainer plate 3 and step surface by 91 sealings of o type circle.

Be provided with core retainer plate conical seal (contact)face 35 on the core retainer plate right side.The left end ofmandrel 4 is fixing silently 5, and right-hand member passes the core retainer plate center hole and formed thejut 41 with mandrel conical seal (contact)face 45, is provided withseal ring 92 betweenjut 41 and mandrel right side.Sealring 92 contacts with the core retainer plate conical seal (contact) face with mandrel conical seal (contact)face 45 and form the sealing contact simultaneously.

Be provided with limited step in the main valve body fluid passage on core retainer plate right side, limit dais terrace 13 is C with distance between relative mandrel end.Referring to Fig. 2, relative with limit dais terrace mandrel has thegroove 44 that radially extends on the right side, when mandrel moves, when the mandrel right side contacted with limit dais terrace 13, the fluid passage on right side, mandrel right side can communicate bygroove 44 with the fluid passage in left side, mandrel right side.

Sliding sleeve 6 comprises polyurethane sleeve 61, is connected to the y-type seal ring 93 of polyurethane sleeve 61 right-hand members,spring housing 62, be connected to thevexed cover 63 ofspring housing 62 left ends etc.Polyurethane sleeve 61 is fixed on the periphery of vexed cover and spring housing, and y-type seal ring 93 is fixed on the periphery of spring housing.O type circle 94 is set between polyurethane sleeve 61 and y-type seal ring 93.The periphery of polyurethane sleeve 61 and y-type seal ring 93 all contacts with the fluid passage inner wall sealing of auxiliary valve body.Be provided with o RunddichtringO 95 on this polyurethane sleeve left side.

Silently 5 periphery has silently conical seal (contact) face 55.The left end endoporus of vexed cover has the sliding sleeve conical seal (contact)face 65 that coordinates with conical seal (contact)face 55 silently.

Sliding sleeve is sleeved on mandrel and can endwisely slipping along mandrel; Sliding sleeve and thejut 41 with mandrel conical seal (contact) face lay respectively at the both sides of core retainer plate.Be provided withspiral compression spring 99 between the left end of thespring housing 62 of sliding sleeve and core retainer plate, the trend that thisspiral compression spring 99 makes sliding sleeve have when normality to be moved to the left, thereby make sliding sleeve with silently the sealing contact, simultaneously, the elastic force ofspiral compression spring 99 also makes by sliding sleeve silently has the trend that is moved to the left, thereby make fixing mandrel silently have the trend that is moved to the left, like this, mandrel mandrel when normality contacts with the core retainer plate sealing.Thus,spiral compression spring 99 make simultaneously when normality sliding sleeve with silently seal contact, the sealing of mandrel and core retainer plate contacts.

Tool joint pin 200 shown in Figure 3 hasrunner 71 inpublic valve body 7, and the left end of runner is used for being connected with fluid hose.Be provided with thevalve seat 72 that has the hole in runner, thespool 8 that can move along the runner axis is arranged in runner.Referring to Fig. 4, spool comprises with the corresponding guide pin bushing 81 of runner inner wall,valve core head 83, is connected the connectingbody 82 of guide pin bushing and valve core head, and the external diameter of connecting body and valve core head is all less than the runner internal diameter; Have fluid through-hole 84 in connecting body, an end of fluid through-hole communicates with the endoporus of guide pin bushing, and the other end of fluid through-hole is opened on the periphery of connecting body.Be provided with o RunddichtringO 96 between the right side of valve core head and spool.Has spool conical seal (contact)face 85 on the right flank of valve core head.Has the valve seat conical seal (contact)face 75 that coordinates with the spool conical seal (contact) face on the left side of valve seat.Collar 201 is set in the runner of public valve body, and collar 201 right-hand members arrangespring cup 202, and Compress Spring 203 passes guide pin bushing and joins with spring cup and connecting body respectively.Compress Spring 203 makes o RunddichtringO 96, spool conical seal (contact) face 85 all contact with 75 sealings of valve seat conical seal (contact) face when normality.

Positioning means comprisesovercoat 301, nineballs 302,spring 303 etc.Being provided with in the auxiliary valve body periphery can be along the axiallymovable overcoat 301 of mandrel, and the endoporus of overcoat hasprominent ring 304; Has outstanding back-upring 24 on the periphery of auxiliary valve body.Back-up ring is in the endoporus of overcoat; Back-up ring is in the left side of prominent ring, and relative at axial direction withprominent ring.Spring 303 is arranged between the left side of prominent ring right side and main valve body, and during normality,spring 303 makes the left side of prominent ring contact with the right side of back-up ring.Radially have nine throughholes 25 along mandrel on auxiliary valve body.Circumferentially have at public valve body the ring-type V-shaped groove 74 that the cross section is V-arrangement.

In the time of need to docking tool joint pin with female joint, first overcome the axis of elasticity ofspring 303 to the overcoat that moves right, make the outer prominent ring that puts at ball not in the radial direction, make ball radially moving freely.Then public valve body right-hand member is inserted in the circulation passage of auxiliary valve body, the right-hand member of public valve body first radially is pushed to ball in throughhole 25 and back-up ring and the interval of dashing forward between encircling, along with continuing to insert, relative public valve body right side contacts with the polyurethane sleeve left side, and relative spool right side contacts with the mandrel left side.Put in place when public valve body moves to right, the right side of public valve body promotes sliding sleeve along the mandrel axis distance A that moves right, and spool promotes mandrel and moves right apart from B along the mandrel axis, and B is less than A; At this moment, the limit dais terrace contacts with the mandrel right side, V-shaped groove 74 at throughhole 25 in same plane.Then, unclamp overcoat, make under the outer effect that is enclosed withinspring 303 to move to left, until contact with back-up ring to prominent ring, the prominent promotion ball that encircles enters in through hole and V-shaped groove 74, completes docking operation.

after docking is completed,public valve body 7inner flow passage 71 left ends are bycollar 201 endoporus,spring cup 202 endoporus, guide pin bushing 81 endoporus, fluid through-hole 84, gap between valve core head periphery and runner inner wall, gap between spool conical seal (contact) face and valve seat conical seal (contact) face, the gap between conical seal (contact) face and vexed cover conical seal (contact) face silently, gap between the periphery of mandrel and vexed cover endoporus, gap between the periphery of mandrel and spring housing communicates with fluid passage in auxiliary valve body, fluid passage in auxiliary valve body is by the core retainer plate center hole, gap between core retainer plate conical seal (contact) face and mandrel conical seal (contact) face, gap between the flow channel inwall of mandrel right-hand member periphery and main valve body,groove 44 communicates with the flow channel right-hand member of main valve body.Like this, the left end of the right-hand member of fluid passage and runner has formed the passage of a perforation.In mated condition, o RunddichtringO 95 and y-type seal ring 93 prevent outward leakage;O type circle 94 prevents interior leakage.In mated condition, tool joint pin still can be rotated 360 ° around the axis of mandrel with respect to female joint, and keeps sealing, connects safe and reliable.When back-up ring encircles when axial direction contacts with prominent, ball is positioned at and is positioned at simultaneously v shape groove and through hole, under this state, because prominent ring has blocked ball in radial direction, the inclined-plane, both sides of v shape groove can not promote ball and make ball radially move, can not move axially so be provided with the public valve body of v shape groove, thereby make tool joint pin be locked in the state that docks with female joint.

In the time of need to extracting tool joint pin in the female joint, need the overcoat that first axially move right, make the outer prominent ring that puts at ball not in the radial direction, make ball radially moving freely.And then extract tool joint pin, a skew back face of v shape groove can promote ball and radially move, and makes ball leave in v shape groove and enters in interval between through hole and back-up ring and prominent the ring.

After extracting tool joint pin, tool joint pin makes again o RunddichtringO 96, spool conical seal (contact)face 85 all contact with 75 sealings of valve seat conical seal (contact) face under the effect of CompressSpring 203, has guaranteed that the fluid hose that is connected with the left end of tool joint pin can not leak.Certainly, female joint under the effect ofspiral compression spring 99, make sliding sleeve with silently seal contact, the sealing of mandrel and core retainer plate contacts, and guaranteed that the fluid circuit that is connected with female joint can not leak.For female joint, when not inserting tool joint pin, female joint is connected with fluid circuit, and otype circle 91 andseal ring 92 have sealed an end of fluid circuit, even there is oil pressure also can not reveal.

With after female joint is docked, when joint was connected, the place that originally is in sealing under the state of access failure all was opened when tool joint pin, and pressure oil with regard to passing through this rapid pipe joint, is connected on other oil circuit like this.

The beneficial effect of this rapid pipe joint:

1, female joint can be born elevated pressures, that is to say, when female joint was connected with fluid circuit, when having elevated pressures in fluid circuit, female joint can not leaked.Because making the mandrel conical seal (contact) face, the elastic element in female joint contacts with the core retainer plate conical seal (contact) face; And the core retainer plate conical seal (contact) face is relative with fluid passage one end that is connected with fluid circuit, and the pressure of fluid circuit inner fluid also makes the mandrel conical seal (contact) face contact with the core retainer plate conical seal (contact) face; Can say, the fluid circuit internal pressure is larger, and the sealing effect of mandrel and core retainer plate is better.

2, tool joint pin can be born elevated pressures, that is to say, when tool joint pin was connected with fluid hose, when having elevated pressures in fluid hose, tool joint pin can not leaked.Because making the spool conical seal (contact) face, the elastic component in tool joint pin contacts with the valve seat conical seal (contact) face; And the valve seat conical seal (contact) face is relative with runner one end that is connected with fluid hose, and the pressure of fluid hose inner fluid also makes the spool conical seal (contact) face contact with the valve seat conical seal (contact) face; Can say, the fluid hose internal pressure is larger, and the sealing effect of spool and valve seat is better.

3, docking operation is convenient and swift, and the interior runner of the fluid passage in the main-valve body and public valve body docks with female joint in tool joint pin completes the passage that can form a perforation, and fluid circuit can communicate with fluid hose by this passage.During docking, public valve body one end is inserted the main-valve body, the end face of public valve body promotes sliding sleeve along mandrel axis displacement distance A, and spool promotes mandrel along mandrel axis displacement distance B, and B is less than A.That is to say, after public valve body passes into the main-valve body, spool has produced relative displacement (displacement amount A-B) with respect to public valve body (valve seat), has produced gap (A-B is suitable with displacement amount) between spool conical seal (contact) face and valve seat conical seal (contact) face thereby make; Certainly, silently also produced gap (A-B is suitable with displacement amount) between conical seal (contact) face and sliding sleeve conical seal (contact) face, also produced gap (B is suitable with displacement amount) between mandrel conical seal (contact) face and core retainer plate conical seal (contact) face, therefore, between spool and valve seat, silently with sliding sleeve between, between mandrel and core retainer plate all no longer sealing contact, fluid passage and runner have been linked to be the passage of a perforation.Can find out from this docking operation, the perforation of passage is along with the docking operation of tool joint pin and female joint is completed, and docks completely, and passage connects.

Be provided with limited step in the fluid passage, the limit dais terrace equals B with distance C between relative mandrel end; When spool promoted mandrel along mandrel axis displacement distance B, the limit dais terrace contacted with relative mandrel end.Due to the distance C=B between limit dais terrace and relative mandrel end, with after female joint is docked, mandrel contacts with the limit dais terrace, makes mandrel be in a stable position when tool joint pin.

Present technique can be described as a kind of ultra-high pressure quick coupling, and it has some features: 1. adopt the double-sealing mode, safe and reliable, internal structure is compact, and volume is light and handy, is easy to carry.2. female joint and tool joint pin are equipped with built-in shutoff valve, and during the partition joint, shutoff valve utilizes spring meeting autoshutdown to prevent liquid outflow, keeps the pressure in pipeline, and partition is simple, convenient operation.3. when two joints (tool joint pin and female joint) when being connected, without the fluid leaks phenomenon, sealability is high; Can 360 ° of rotations between two joints, and keep simultaneously tightness, connect safe and reliable.4. have interchangeability, can freely connect by a plurality of pipelines.Present technique is mainly used in high-pressure service pump, jack, fixture, hydraulic spanner, the products such as bolt tensioning jack.

Claims (8)

1. female joint is characterized in that: comprise the main-valve body with fluid passage; One end of fluid passage is used for being connected with fluid circuit, and the other end is used for inserting tool joint pin; Be provided with the core retainer plate that has center hole in the fluid passage, be provided with the core retainer plate conical seal (contact) face on the core retainer plate end face relative with fluid passage one end that is connected with fluid circuit; One end of mandrel is fixing silently, the other end of mandrel passes the core retainer plate center hole and be provided with the mandrel conical seal (contact) face that contacts with the sealing of core retainer plate conical seal (contact) face; Periphery silently has silently conical seal (contact) face; Sliding sleeve is sleeved on mandrel and can endwisely slipping along mandrel; One end of sliding sleeve has the sliding sleeve conical seal (contact) face that contacts with the sealing of conical seal (contact) face silently; Be provided with elastic element between sliding sleeve and main-valve body or core retainer plate, this elastic element make simultaneously when normality sliding sleeve with silently seal contact, the sealing of mandrel and core retainer plate contacts.

2. female joint as claimed in claim 1 is characterized in that: be provided with limited step in the fluid passage, when mandrel moved a certain distance along the mandrel axis, the limit dais terrace contacted with relative mandrel end.

3. female joint as claimed in claim 1 is characterized in that: sliding sleeve comprises the polyurethane sleeve that periphery contacts with the fluid passage inner wall sealing and the vexed cover that arranges in the endoporus of polyurethane sleeve, described sliding sleeve conical seal (contact) face is arranged on vexed cover one end.

4. female joint as claimed in claim 3 is characterized in that: be provided with the o RunddichtringO on polyurethane sleeve one end face.

5. female joint as claimed in claim 4 is characterized in that: another end of polyurethane sleeve is connected with the y-type seal ring that periphery contacts with the fluid passage inwall.

6. female joint as claimed in claim 1 is characterized in that: be provided with the seal ring that contacts for the core retainer plate conical seal (contact) face on mandrel.

7. female joint as claimed in claim 1 is characterized in that: described main-valve body comprises main valve body and auxiliary valve body, and main valve body and auxiliary valve body respectively have the fluid passage that communicates; One end periphery of auxiliary valve body is connected with step hole in the main valve body fluid passage by screw thread; Core retainer plate is between the end of the step surface of step hole and auxiliary valve body.

8. female joint as claimed in claim 7 is characterized in that: an end of the fluid passage of main valve body is used for being connected with fluid circuit, seals by o type circle between core retainer plate and step surface.

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