CN115199851A - Non-welding sealing device for flange-free double-wall pipe orifice - Google Patents

Abstract

The invention discloses a flange-free double-wall pipe orifice non-welding sealing device, which comprises an inner tightening device, wherein the inner tightening device comprises an inner pressing cover, an inner pressing cover base, a main support, an inner cone and an inner holder, the inner pressing cover is annular, the inner pressing cover base is cylindrical, one end of the inner pressing cover base is fixedly connected with the inner side of the inner pressing cover, the other end of the inner pressing cover base is closed, an inner tightening structure is arranged between the inner pressing cover and the main support, the inner cone is connected to the inner pressing cover, the inner cone and the inner holder are cylindrical and positioned on the outer side of the inner pressing cover base, the outer side of the inner cone and the inner side of the inner holder are conical surfaces, the inner cone and the conical surface of the inner holder are matched with each other, a sealing body is arranged between the inner cone and the inner pressing cover, and the sealing body is positioned at the outer edge of the inner pressing cover.

Description

Non-welding sealing device for flange-free double-wall pipe orifice

Technical Field

The invention belongs to the technical field of pressure pipelines, and particularly relates to a non-welding sealing device for a flange-free double-wall pipe opening.

Background

In the process of factory prefabrication or subsequent installation and construction of the pressure pipeline, tightness and strength tests of the pipeline are usually required to ensure the quality of the pipeline. The conventional method is to seal two ends of the pipeline and realize pressurization, pressure maintaining and leakage detection on the pipeline through a pressurizing connector. It is relatively simple to perform this operation for pipes that are connected by flanges, threads, etc. with corresponding sealed pipe elements. If the pipe end is an original steel pipe opening (without flange, rolling groove or thread) before the tightness and strength test of the pipeline, the common method is to weld a sealing device for testing, and then cut and polish the pipe end after the test; the operations of welding, cutting, polishing and the like are involved, so that time and labor are wasted, material is wasted, and the manufacturing and installation progress is delayed easily in the operation process.

For double-wall pipes or jacketed pipes (called double-wall pipes for short) with pipe ends being original steel pipe openings, the difficulty of tightness and strength tests of the pipes is greatly increased; at present, due to popularization of gas equipment, the stainless steel double-wall pipe connected in a butt welding mode is widely applied, and the method is more important for solving the problems of tightness and strength tests of the products.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the sealing device which can be applied to the sealing of the double-wall pipe orifice, the expansion and the sealing of the sealing device are realized by rotating the handle during the sealing, the sealing between the double-wall pipes is realized, the tightness and the strength test operation become very simple and reliable, simultaneously, along with the rise of the test operation pressure, the expansion force of the clamping ring rises, the friction force also correspondingly increases, and the potential possibility of safety accidents is also reduced.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a no flange double-walled mouth of pipe sealing device that does not weld, includes interior propping ware, interior propping ware includes interior gland, interior gland base, main support, inner cone and interior holder, interior gland is cyclic annularly, and interior gland base is the tube-shape, the one end of interior gland base and the inboard fixed connection of interior gland, the other end seal and the main support between be provided with interior tensioning texture, inner cone connects in interior pressure and covers, inner cone and interior holder all are the tube-shape and lie in the outside of interior gland base, the outside of inner cone and the inboard of interior holder are the conical surface, inner cone and interior holder's conical surface mutually supports, be provided with the seal between inner cone and the interior gland, the seal is located the outer fringe department of interior gland.

And further, anti-skid teeth are arranged on the outer side surface of the inner holder.

Further the lateral surface of interior holder is provided with annular outer recess, be provided with the inner spring in the outer recess.

Further, an exhaust connecting pipe is connected to the inner pressure cover, one end of the exhaust connecting pipe penetrates through the inner pressure cover, and the other end of the exhaust connecting pipe penetrates through the main support.

Further interior tension structure includes main pull rod and clamping handle, on main pull rod one end was fixed in interior gland base, the other end had the external screw thread and passed main support to the outside, clamping handle and main pull rod threaded connection.

Further still include outer binding clasp, outer binding clasp includes outer gland, keeps off ring, solid fixed ring, outer cone and outer holder, outer gland is the ring form, the outside of outer gland is connected to the one end that keeps off the ring, keeps off the other end of ring and solid fixed ring's outside threaded connection, form the centre gripping space between outer gland, the fender ring and the solid fixed ring, outer cone and outer holder are located the centre gripping space, the inboard of outer cone and the outside of outer holder are the conical surface, and outer cone and outer holder's conical surface mutually supports.

Further, the fixing ring is connected with the main support into a whole.

And further, anti-skidding teeth are arranged on the inner side surface of the outer holder.

Further, the inner side surface of the outer holder is provided with an annular inner groove, and an outer spring is arranged in the inner groove.

Further, the baffle ring and the outer gland are integrated, and an outer pressing handle is arranged on the baffle ring.

Compared with the prior art, the invention has the beneficial effects that: the device can be directly applied to the sealing of double-wall pipes, the inner tightening device is sent to the position between the inner pipe and the outer pipe, when the clamping handle is rotated, the cone is pressed into the corresponding clamp holder through the hollow shaft and the gland, and the clamp holders are respectively sealed and expanded at the same time to complete the sealing and the expansion; the placing and the subsequent disassembling can be realized only by rotating the clamping handle, and the sealing of the pipe orifice can be realized by extremely simple and reliable operation; meanwhile, with the rise of the test operation pressure, the force of the test medium acting on the gland is also increased, the final expansion force is also increased through the cone acting on the clamp holder, the friction force is also correspondingly increased, and the potential possibility of safety accidents is also reduced. The application range of the industrial field is wide, the manufacture and the use are convenient, the cost is low, and the safety is high.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the non-welding sealing device for a flangeless double-wall pipe orifice of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the non-welding sealing device for a flangeless double-walled pipe orifice of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2.

Reference numerals: 101. an inner tube; 102. an outer tube; 2. a main support; 3. an inner gland; 4. a seal body; 5. an inner cone; 6. an inner holder; 61. an outer spring; 7. an exhaust adapter; 8. an inner gland base; 9. a main pull rod; 10. a clamping handle; 11. a fixing ring; 12. a baffle ring; 13. an outer gland; 14. an outer holder; 141. an inner spring; 15. an outer cone.

Detailed Description

An embodiment of the flangeless double-walled pipe orifice non-welding sealing apparatus of the present invention is further described with reference to fig. 1 to 3.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, which should not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" or "a number" means two or more unless explicitly specified otherwise.

The first embodiment is as follows:

the utility model provides a no flange double-walled mouth of pipe sealing device that does not weld, includes interior fastener that props, interior fastener includesinterior gland 3,interior gland base 8,main support 2,interior cone 5 andinterior holder 6,interior gland 3 is cyclic annularly, andinterior gland base 8 is the tube-shape, the inboard fixed connection of one end andinterior gland 3 ofinterior gland base 8, the other end seal and be provided with interior tension structure betweenmain support 2,interior cone 5 connects oninterior gland 3,interior cone 5 andinterior holder 6 all are the tube-shape and lie in the outside ofinterior gland base 8, and the outside ofinterior cone 5 and the inboard ofinterior holder 6 are the conical surface,interior cone 5 andinterior holder 6's conical surface mutually supports, be provided withseal 4 betweeninterior cone 5 and theinterior gland 3,seal 4 is located the outer fringe department ofinterior gland 3.

As shown in fig. 1, theinner gland 3,inner gland base 8,inner cone 5 andinner holder 6 of the present embodiment have an inner diameter slightly larger than the outer diameter of theinner tube 101 of the double-walled tube and slightly smaller than the inner diameter of theouter tube 102, so that the inner tensioner can be smoothly fed between theinner tube 101 and theouter tube 102.

Whole interior propping ware is a basic overall structure, put into in the double-walled pipe with it, and makemain support 2 be located double-walled pipe outside one side, effect through interior straining structure, makeinterior gland 3 remove tomain support 2 one side, and then make the conical surface interact ofinterior cone 5 andinterior clamp 6, outwards prop openinterior clamp 6, the outside ofinterior clamp 6 and the inner wall frictional force increase ofouter tube 102,cone 5 will compress tightlyseal 4 withinterior gland 3 in this in-process, makeseal 4 deformation and paste tight seal with the inner wall ofouter tube 102.

In this embodiment, thesealing body 4 may be a sealing ring of a gel structure, such as a rubber ring or a silica gel ring.

At this time, as shown in fig. 1, the end of the entireinner tube 101 is actually covered by theinner gland 3 and theinner gland base 8, theinner tube 101 and theouter tube 102 communicate with each other through the end of the inner end, and theouter tube 102 is isolated from the outside.

In the preferred embodiment, the outer side surface of theinner holder 6 is provided with anti-slip teeth; the anti-slip teeth serve to increase the friction between the outside of theinner holder 6 and theouter tube 102 to accommodate the greater pressure within the double-walled tube, preventing ejection.

In the preferred embodiment, the outer side surface of theinner holder 6 is provided with an annular outer groove, and aninner spring 141 is arranged in the outer groove.

In addition, theinner holder 6 can be divided into two sections in the axial direction by the groove, so that theinner holder 6 can expand and expand under the action of theinner cone 5 more easily, the inner wall of theouter tube 102 is quickly supported, when theinner gland 3 is far away from themain bracket 2 after theclamping handle 10 is unscrewed, namely theinner gland 5 is far away from themain bracket 2, the pressure inside theinner holder 6 is reduced, and theinner holder 6 can be quickly contracted inwards under the action of theinner spring 141 to be separated from the inner wall of theouter tube 102.

Theinner holder 6 of the preferred embodiment has a plurality of expansion slots opened in a longitudinal direction in a circumferential direction, the expansion slots preferably extending from theinner gland 3 toward themain bracket 2, and the expansion slots divide theinner holder 6 into a plurality of portions in the circumferential direction, so that theinner holder 6 can be expanded or contracted inward more easily.

In the preferred embodiment, theinner gland 3 is connected with anexhaust connecting pipe 7, one end of theexhaust connecting pipe 7 penetrates through theinner gland 3, and the other end of theexhaust connecting pipe 7 penetrates through themain support 2.

After the double-wall pipe support is tightly sealed by the inner supporting device, one end of theexhaust connecting pipe 7 is positioned in the double-wall pipe, the other end of the exhaust connecting pipe is positioned outside the double-wall pipe, and one end positioned outside the double-wall pipe is provided with a plug, wherein the plug is detachable; of course, theair outlet connection 7 can also be used as a water outlet connection, which can be used for air outlet when it is at 12 o 'clock in fig. 1, and which can be used for water outlet when it is at 6 o' clock.

The preferred interior tension structure of this embodiment includesmain pull rod 9 andclamping handle 10, onmain pull rod 9 one end was fixed ininterior gland base 8, the other end had the external screw thread and passedmain support 2 to the outside,clamping handle 10 andmain pull rod 9 threaded connection.

Themain pull rod 9 can be locked or loosened by rotating theclamping handle 10, so as to control theinner gland 3 and themain bracket 2 to approach or separate from each other.

The second embodiment:

as shown in fig. 2 and 3, the present embodiment is a technology added on the basis of the first embodiment, and specifically includes an outer clamping device, where the outer clamping device includes anouter gland 13, abaffle ring 12, a fixingring 11, anouter cone 15 and anouter holder 14, theouter gland 13 is in a circular ring shape, one end of thebaffle ring 12 is connected to the outer side of theouter gland 13, the other end of thebaffle ring 12 is in threaded connection with the outer side of the fixingring 11, a clamping space is formed between theouter gland 13, thebaffle ring 12 and the fixingring 11, theouter cone 15 and theouter holder 14 are located in the clamping space, the inner side of theouter cone 15 and the outer side of theouter holder 14 are conical surfaces, and theouter cone 15 and the conical surface of theouter holder 14 are matched with each other.

For a thin-walled pipe with theouter pipe 102, an outer clamp may be added to avoid deformation of the pipe due to too much expansion force of the inner tensioner.

In use, thestop ring 12 is rotated to make the outerpressing cover 13 close to the fixingring 11, and further theouter cone 15 presses theouter holder 14, so that theouter holder 14 is compressed inward and pressed against the outer wall of theouter tube 102, and the specific position of theouter holder 14 is the same as that of theinner holder 6, i.e. both of them act on the same position of theouter tube 102, so that when the inner holder acts, theouter holder 14 can be used as a stable supporting structure to prevent theinner holder 6 from deforming theouter tube 102.

In the preferred embodiment, the fixingring 11 is integrally connected with themain support 2.

And preferably, thebaffle ring 12 and the outerpressing cover 13 are integrated, and an outer pressing handle is arranged on thebaffle ring 12.

As shown in fig. 2, the one-piece construction allows for ease of assembly with fewer parts.

The inner side of theouter holder 14 is preferably provided with anti-slip teeth.

The anti-slip teeth are able to increase the friction between theouter holder 14 and theouter tube 102, while at the same time the anti-slip teeth of theinner holder 6 can be removed, i.e. only the anti-slip teeth of theouter holder 14 remain.

The inner side of theouter holder 14 in this preferred embodiment is provided with an annular inner groove, and anouter spring 61 is arranged in the inner groove.

Theouter spring 61 is configured to allow theouter holder 14 to expand rapidly outwardly away from the outer wall of theouter tube 102 when the outer clamp is released.

The present embodiment preferably has an operation ring on themain support 2 to facilitate taking and controlling themain support 2.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (10)

1. The utility model provides a no welding sealing device of no flange double-walled mouth of pipe which characterized in that: including interior supporting device, interior supporting device includes interior gland, interior gland base, main support, interior cone and interior holder, interior gland is cyclic annular, and interior gland base is the tube-shape, the one end of interior gland base and the inboard fixed connection of interior gland, the other end seal and be provided with interior tension structure between the main support, interior cone connection is covered in interior pressure, interior cone and interior holder all are the tube-shape and lie in the outside of interior gland base, and the outside of interior cone and the inboard of interior holder are the conical surface, interior cone and interior holder's conical surface mutually support, be provided with the seal between interior cone and the interior gland, the seal is located the outer fringe department of interior gland.

2. The flangeless double-walled pipe orifice non-welding sealing arrangement of claim 1, wherein: and anti-skidding teeth are arranged on the outer side surface of the inner holder.

3. The flangeless double-walled pipe orifice non-welded sealing arrangement of claim 2, wherein: the outer side surface of the inner holder is provided with an annular outer groove, and an inner spring is arranged in the outer groove.

4. The flangeless double-walled pipe orifice non-welding sealing arrangement of claim 3, wherein: and an exhaust connecting pipe is connected to the inner pressure cover, one end of the exhaust connecting pipe penetrates through the inner pressure cover, and the other end of the exhaust connecting pipe penetrates through the main support.

5. The flangeless double-walled pipe orifice non-welding sealing arrangement of claim 4, wherein: interior tensioning texture includes main pull rod and clamping handle, on main pull rod one end was fixed in interior gland base, the other end had the external screw thread and passed main support to the outside, clamping handle and main pull rod threaded connection.

6. The flangeless double-walled pipe orifice non-welding sealing arrangement of claim 1, wherein: still include outer binding clasp, outer binding clasp includes outer gland, keeps off ring, solid fixed ring, outer cone and outer holder, outer gland is the ring form, the outside of outer gland is connected to the one end that keeps off the ring, keeps off the other end of ring and solid fixed ring's outside threaded connection, form the centre gripping space between outer gland, fender ring and the solid fixed ring, outer cone and outer holder are located the centre gripping space, the inboard of outer cone and the outside of outer holder are the conical surface, and outer cone and outer holder's conical surface mutually supports.

7. The flangeless double-walled pipe orifice non-welded sealing arrangement of claim 6, wherein: the fixing ring is connected with the main bracket into a whole.

8. The flangeless double-walled pipe orifice non-welded sealing arrangement of claim 7, wherein: and anti-skidding teeth are arranged on the inner side surface of the outer holder.

9. The flangeless double-walled pipe orifice non-welded sealing arrangement of claim 8, wherein: the inner side surface of the outer holder is provided with an annular inner groove, and an outer spring is arranged in the inner groove.

10. The flangeless double-walled pipe orifice non-weld sealing apparatus of claim 9, wherein: the baffle ring and the outer gland are integrated, and an outer pressing handle is arranged on the baffle ring.

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