CN2384087Y - Expansion joint for metal pipe - Google Patents
Expansion joint for metal pipe Download PDFInfo
- Publication number
- CN2384087Y CN2384087Y CN 98231728 CN98231728U CN2384087Y CN 2384087 Y CN2384087 Y CN 2384087Y CN 98231728 CN98231728 CN 98231728 CN 98231728 U CN98231728 U CN 98231728U CN 2384087 Y CN2384087 Y CN 2384087Y
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- ring
- face
- short tube
- sleeve pipe
- core body
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Abstract
The utility model relates to a telescopic joint for metal pipes, which comprises a short pipe 1, a short pipe 2, and a casing pipe 3. A telescopic clearance 4 is arranged between the inner ends of the two short pipes; one end of the casing pipe 3 is connected with the inner end of the short pipe 1 in a sealing mode, and the inner wall surface of the other end of the casing pipe 3 is connected with the outer wall surface of the inner end of the short pipe 2 to become a free end; a pressure ring 8 is arranged at the telescopic clearance contiguous to the short pipe 1, a concave cavity 9 is arranged on the outer wall of the pressure ring, and a positioning ring 10 and a sealing ring 11 which can seal the outer end face of the positioning ring 10 and the inner wall of the casing pipe 3 are arranged in the concave cavity 9; the pressure ring 8 has a separated structure composed of at least two blocks and is connected with the inner wall face of the casing pipe 3; both ends of the corrugated pipe section 12 are respectively connected with the inner end of the short pipe 2 and the inner end of the positioning ring 10.
Description
The utility model belongs to a kind of piecing devices with flexible ability that are used to connect metal section when laying metallic conduit, be applicable to the metallic conduit of discharge pressure medium, as be used between the steel pipe pipeline section of water power plant conduit pipe and conduit pipe and spiral case feed-water end between be connected etc.
Because the metal conveyance conduit is transferred medium physical property and physical environment influence of temperature variation, expand with heat and contract with cold and can produce, for preventing that consequent temperature stress from damaging conveyance conduit, therefore, need to use slip joint to connect between the metal section with flexible ability.
Fig. 1 shows a kind of slip joint commonly used at present, and this slip joint comprises short tube 1, short tube 2 and sleeve pipe 3.Described two short tubes have flexible gap 4 between relative the inner, and an end of sleeve pipe 3 and the inner end of short tube 1 are detachable being tightly connected by seal ring 5 sealings, and the internal face of the other end of sleeve pipe 3 engages with the outer wall of short tube 2 inner ends and is free end.When pipeline produced axial stretching because of expanding with heat and contract with cold, the axial slide relative that is produced by two short tubes was eliminated the temperature stress of pipeline, prevents that pipeline from wrecking.On the mating face of the internal face of sleeve pipe 3 and short tube 2 outer wall, establish seal ring 6, and by pressure ring 7 location, to satisfy sealing.Though this slip joint is simple in structure, but because the short tube of big caliber or big caliber is subjected to the influence of factors such as external force easily to produce radial deformation in manufacturing, transportation and installation process, therefore, seal ring 6 is difficult to satisfy seal request and produces leakage, particularly leaks serious when the higher medium of discharge pressure.
The purpose of this utility model provides a kind of telescopic metal pipe section that does not leak.And when members such as its sleeve pipe and one of them short tube shift out from the pipeline of installing, and be applicable to the devices such as valve type that are provided with in the pipeline and be connected.
First aspect of technical solutions of the utility model, referring to Fig. 2, the slip joint that is used for metallic conduit that is provided comprises short tube 1, short tube 2 and sleeve pipe 3, two short tubes have flexible gap 4 between relative the inner, one end of sleeve pipe 3 and the inner end of short tube 1 are detachable being tightly connected, the other end internal face of sleeve pipe 3 engages with short tube 2 inner end outer wall and is free end, produces axial slide relative to satisfy two short tubes.Position in the flexible gap 4 of adjacent short tube 1 the inner is provided with pressure ring 8, be provided with an annular cavity 9 on the outer wall of pressure ring 8 the inners, the positioning ring 10 that has the re-spective engagement face with this annular cavity chamber wall is set in this cavity, the seal ring 11 of seal retainer ring 10 exterior edge faces and sleeve pipe 3 internal faces simultaneously is set in annular cavity 9 outer ends.Pressure ring 8 is detachable the connection with sleeve pipe 3 internal faces, and positioning ring 10 and seal ring 11 are compressed and spacing, and pressure ring 8 be along the circumferential direction at least by two split-type structurals of forming, and pressure ring 8 also can be dismantled inwardly.In flexible gap 4 corrugated pipe segment 12 is set, the two ends of this corrugated pipe segment are connected hermetically with the inner of short tube 2 and the inner of positioning ring 10 respectively.
Because the corrugated pipe segment that is located in the flexible gap has flexible under external force and vertically ability, and two ends are connected with positioning ring 10 the inners hermetically with short tube 2 the inners respectively, seal ring 11 and locate static state seal retainer ring exterior edge face and internal surface of sleeve pipe face reliably makes flexible gap 4 be sealed reliably and not leak.Therefore, the axial stretching that slip joint of the present utility model produced in the time of both can having satisfied metallic conduit and expand with heat and contract with cold is effectively eliminated the temperature stress of pipeline, can avoid effectively again leaking, and prevents the security incident that may cause because of pipe leakage.
On the basis of technical solutions of the utility model aspect first, referring to Fig. 3, adpting flange 13 is set in the outer end of described short tube 2, be used for carrying out detachable the connection with devices such as ducted valve types,
Owing to be provided with adpting flange in short tube 2 outer ends, can realize with pipeline in device such as valve type carry out detachable the connection, simultaneously, pressure ring 8 is made into split-type structural and can dismantles in pipe.By removing being connected of sleeve pipe 3 and short tube 1 and being connected of devices such as dismounting short tube 2 and valve type, and the sleeve pipe 3 that behind the pressure ring 8 of dismounting split-type structural in pipe, moves to right, and obtain axial lifting space, so that sleeve pipe 3 and short tube 2 and member integral body such as corrugated pipe segment 12 and positioning ring 10 are hung out or shift out, thereby be convenient to the maintenance of devices such as valve type in the pipeline.
Fig. 1 is the sectional view of prior art slip joint structure;
Fig. 2 is first embodiment's of the utility model a slip joint structure sectional view;
Fig. 3 is second embodiment's a slip joint structure sectional view, and lower half portion omission, and is chosen to be Figure of abstract;
Fig. 4 is the slip joint structure sectional view that wave core body 21 is set on first embodiment basis, and lower half portion is omitted;
Fig. 5 is the slip joint structure sectional view that increases wave core body 21 on second embodiment basis, and lower half portion is omitted;
Fig. 6 is a kind of structure partial amplification view of the wave core body 21 of slip joint shown in Fig. 4, Fig. 5;
Fig. 7 is the another kind of structure partial amplification view of the wave core body 21 of slip joint shown in Fig. 4, Fig. 5;
Fig. 8 is the modification structures sectional view of slip joint shown in Figure 2, and lower half portion is omitted.
Describe embodiment of the present utility model with reference to the accompanying drawings in detail.
As shown in Figure 2, first embodiment's slip joint is included as short tube 1, short tube 2 and the sleeve pipe 3 of tubular shape, two short tubes have flexible gap 4 between relative the inner, the left end of sleeve pipe 3 is connected with bolt 14 by flange with the inner of short tube 1, and by seal ring 5 static sealings, seal ring 5 should adopt soft rubber-like material.The right part internal face of sleeve pipe 3 engages with the inner end outer wall of short tube 2 and is free end, and mating face gapped 15, the right-hand member of sleeve pipe 3 is established setting sleeve 16, establish close circle 17 at the setting sleeve 16 and the junction point of sleeve pipe 3, and the inner peripheral surface of sealing circle contacts with the outer wall of short tube 2, plays protective action, between setting sleeve 16 inner hole surface and short tube 2 outer wall gapped 18, setting sleeve 16 is connected with screw with sleeve pipe 3 right-hand members, and compresses seal ring 17.Position in the flexible gap 4 of adjacent short tube 1, in the left end of promptly flexible gap pressure ring 8 is set, this pressure ring is along the circumferential direction at least by two split-type structurals of forming, and satisfy blocking type and dismantle inwardly, pressure ring 8 is that two semicircular bodies are formed, when being three arc bodies compositions, be preferably along the circumference five equilibrium, on the inner outer wall of pressure ring 8 annular cavity 9 is set, the positioning ring 10 that has the re-spective engagement face with cavity chamber wall is set in this cavity, be provided for the seal ring 11 of while seal retainer ring 10 exterior edge faces and sleeve pipe 3 internal faces in the annular cavity outer end (diagram left end), the sealing ring should adopt soft rubber-like material, pressure ring 8 is connected with screw with sleeve pipe 3 inwalls, and positioning ring 10 and seal ring 11 are compressed and spacing, makes the reliable sealing of seal ring 11 place's static state.In this example, on the mating face of annular cavity 9 and positioning ring 10 an interlocking face 19 is arranged, produce displacement to flexible gap to stop positioning ring 10, and by spacing reliably.In the flexible gap 4 corrugated pipe segment 12 is set, the two ends of this corrugated pipe segment are connected with positioning ring 10 the inners hermetically with short tube 2 the inners respectively, such as welding.Adopt corrugated pipe segment to seal flexible gap reliably, and the telescopicing performance that corrugated pipe segment had can satisfy the axial stretching that is produced when metallic conduit expands with heat and contract with cold.And adopt described pressure ring 8 and the structure that positioning ring 10 matches, have the advantage of slip joint on manufacturing and mounting process.Slip joint shown in Figure 2, the prefabricated bevel for welding 20 in two short tube outer ends is used for carrying out welding type with metal section and is connected.
The slip joint of second embodiment shown in Fig. 3 is to carry out on the basis of first example structure, promptly in the outer end of short tube 2 adpting flange 13 is set, and is used for carrying out bolt with devices such as valve classes and is connected.Other are with embodiment 1.This routine slip joint is applicable to devices such as ducted valve classes and is connected.As be used for high-head power station and pumped storage power station spiral case feed-water end and the ball valve of conduit pipe waterexit end or being connected of butterfly valve.Remove being connected of sleeve pipe 3 and short tube 1 and being connected of dismounting short tube 2 and valve, and enter pipeline by door to access and dismantle split type pressure ring 8 inwardly, move to right sleeve pipe 3 then and obtain axially lifting space, member integral body such as sleeve pipe 3, short tube 2 and corrugated pipe segment, positioning ring 10 are hung out, then be convenient to maintenance valve.Again lifting relevant member after the maintenance gets final product.
Figure 4 shows that the slip joint of on first embodiment basis, setting up wave core body 21, Figure 5 shows that the slip joint that on second embodiment basis, increases wave core body 21.By Fig. 4, slip joint shown in Figure 5, the interior wave core body 21 that in the cavity of ripple, is provided with at corrugated pipe segment 12, interior to ripple cavity chamber face and the wave core body surface between a gap 22 is arranged, see Fig. 6, Fig. 7, this gap is used for the needs of corrugated pipe segment distortion when flexible, the big I in this gap is determined according to the corresponding extending amount of sharing to ripple in corresponding, but should make when being subjected to radial pressure should in supported by wave core body in regime of elastic deformation to ripple, the outer ring face contact of wave core body 21 or trend towards contacting the internal face of sleeve pipe 3, the export-oriented wave-wave top contact of corrugated pipe segment 12 or trend towards contacting the internal face of sleeve pipe 3.Described wave core body is set, at corrugated pipe segment because of being subjected to radial pressure in the regime of elastic deformation that produces the time, in it to ripple promptly by the wave core body rigid support, and become inferior rigid body member, can effectively prevent corrugated pipe segment unstability when bearing higher or high radial pressure, improve operational reliability, and can suitably reduce the wall thickness of corrugated pipe segment, and bring the advantage that influences with the minimizing internal stress on the manufacturing process.
Fig. 6, Figure 7 shows that two kinds of described wave core body 21 implement structures.Among Fig. 6, wave core body 21 is made of rigid body 23 and the elastic component 24 that is located at respectively on two sides of rigid body, and after elastic component 24 was compressed, the rigid body 23 of wave core body had promptly saved the rigid support effect to this ripple.Among Fig. 7, wave core body 21 is made of the rigid body 25 and the lip-deep soft formation body 26 of rigid body that is laid in.The structure of wave core body 21 is not got rid of other modification structures.The suitable sectional making of wave core body is arranged on interior in the cavity of ripple along circumference.
Figure 8 shows that a kind of modification structures of slip joint shown in Figure 2.The content of modification part is, annular cavity 27 is set on the inwall of short tube 2 inner ends, establish right pressure ring 28 in this cavity, establish circular groove 29 on the right pressure ring 28 inner outer walls, the positioning ring 30 that has the re-spective engagement face with the circular groove groove face is set in the circular groove 29, seal ring 31 is established in the outer end of circular groove 29, the sealing ring is the exterior edge face of seal retainer ring 30 and the bottom surface, chamber of annular cavity 27 simultaneously, right pressure ring 28 is detachable the connection with the chamber diapire of annular cavity 27, and positioning ring 30 and seal ring 31 compressed and spacing, right pressure ring 28 is three compositions.The pressure ring 8 of left part is made up of three arc bodies equally among Fig. 8.This end (right-hand member) of described corrugated pipe segment 12 then is connected with the inner sealed type of positioning ring 30, as welding.On the groove face of the circular groove 29 on the right pressure ring 28 and the mating face of positioning ring 30 an interlocking face 32 is arranged, positioning ring 30 is carried out effectively spacing, and stop it to be pulled to the gap 4 of stretching.Other are with embodiment 1.Described variant content is actually makes the split-type structural of being made up of several members with the inner end of short tube 2, like this, can bring the advantage on manufacturing and the mounting process.Described variant content is equally applicable to Fig. 3, Fig. 4 and slip joint shown in Figure 5.
The corrugated pipe segment 12 of the utility model slip joint has a ripple joint at least, and corrugated pipe segment shown in Figure 8 is three ripple joints, and Fig. 2, Fig. 3, Fig. 4 and corrugated pipe segment shown in Figure 5 are five ripple joints.The sectional shape of ripple joint can be semicircle, or wave crest is circular arc, or is fold shape etc.The sectional shape of the ripple joint of the described corrugated pipe segment 12 of present specification is not the Any shape of straight line for point-to-point transmission then.
Claims (8)
1, a kind of slip joint that is used for metallic conduit, comprise short tube (1), short tube (2) and sleeve pipe (3), described two short tubes flexible gap (4) arranged between the inner relatively, the inner end of one end of described sleeve pipe and short tube (1) is detachable being tightly connected, the internal face of sleeve pipe the other end engages with the inner end outer wall of short tube (2) and is free end, it is characterized in that:
1) is provided with pressure ring (8) at the position in the inner flexible gap (4) of adjacent short tube (1), the outer wall of this pressure ring the inner is provided with an annular cavity (9), be provided with the positioning ring (10) that has the re-spective engagement face with this cavity chamber wall in the annular cavity (9), annular cavity (9) outer end is provided with the seal ring (11) of seal retainer ring (10) exterior edge face and sleeve pipe (3) internal face simultaneously, pressure ring (8) is connected with sleeve pipe (3) internal face, and compress also spacing to positioning ring (10) and seal ring (11), pressure ring (8) is along the circumferential direction at least by two split-type structurals of forming, and can dismantle inwardly
2) be provided with corrugated pipe segment (12) in described flexible gap (4), the two ends of this corrugated pipe segment are connected with the inner of short tube (2) and the inner sealed type of positioning ring (10) respectively.
2,, it is characterized in that the outer end of described short tube (2) is provided with adpting flange (13) according to the described a kind of slip joint that is used for metallic conduit of claim 1.
3, according to the described a kind of slip joint that is used for metallic conduit of claim 1, it is characterized in that the interior wave core body (21) that in the ripple cavity, is provided with at corrugated pipe segment (12), between the surface of the chamber of described cavity face and wave core body (21), there is one to make and only in regime of elastic deformation, produce the gap (22) of distortion to ripple in corresponding, the export-oriented wave-wave top contact of described corrugated pipe segment (12) or trend towards contacting the internal face of sleeve pipe (3), the outer ring face contact of described wave core body (21) or trend towards contacting the internal face of sleeve pipe (3).
4, according to the described a kind of slip joint that is used for metallic conduit of claim 2, it is characterized in that the interior wave core body (21) that in the ripple cavity, is provided with at corrugated pipe segment (12), between the surface of the chamber of described cavity face and wave core body (21), there is one to make and only in regime of elastic deformation, produce the gap (22) of distortion to ripple in corresponding, the export-oriented wave-wave top contact of described corrugated pipe segment (12) or trend towards contacting the internal face of sleeve pipe (3), the outer ring face contact of described wave core body (21) or trend towards contacting the internal face of sleeve pipe (3).
5,, it is characterized in that described wave core body (21) is made of rigid body (23) and the elastic component (24) that is located at respectively on two sides of rigid body according to claim 3 or 4 described a kind of slip joints that are used for metallic conduit.
6,, it is characterized in that described wave core body (21) is made of rigid body (25) and the lip-deep soft formation body of the rigid body that is laid in (26) according to claim 3 or 4 described a kind of slip joints that are used for metallic conduit.
7, according to claim 1, or 2, or 3, or 4 described a kind of slip joint that is used for metallic conduit, the inwall that it is characterized in that short tube (2) inner end is provided with annular cavity (27), be provided with right pressure ring (28) in this annular cavity, establish circular groove (29) on the inner outer wall of right pressure ring (28), be provided with the positioning ring (30) that has the re-spective engagement face with this circular groove groove face in the circular groove (29), the outer end of circular groove (29) is provided with the seal ring (31) of seal retainer ring (30) exterior edge face and annular cavity (27) bottom surface, chamber simultaneously, right pressure ring (28) is detachable the connection with the chamber diapire of annular cavity (27), and compress also spacing to positioning ring (30) and seal ring (31), right pressure ring (28) is along the circumferential direction at least by two split-type structurals of forming, and can dismantle inwardly, the right-hand member of described corrugated pipe segment (12) then is connected with the inner sealed type of positioning ring (30).
8,, it is characterized in that corrugated pipe segment (12) has a ripple joint at least according to claim 1 or 2 or 3 or 4 described a kind of slip joints that are used for metallic conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98231728 CN2384087Y (en) | 1998-11-30 | 1998-11-30 | Expansion joint for metal pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98231728 CN2384087Y (en) | 1998-11-30 | 1998-11-30 | Expansion joint for metal pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2384087Y true CN2384087Y (en) | 2000-06-21 |
Family
ID=33980979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98231728 Expired - Fee Related CN2384087Y (en) | 1998-11-30 | 1998-11-30 | Expansion joint for metal pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2384087Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101449095B (en) * | 2006-05-24 | 2013-10-30 | 泰特弗莱克斯公司 | Sealing device and method with ridges for corrugated stainless steel tubing |
| CN105953001A (en) * | 2016-04-21 | 2016-09-21 | 中国水利水电建设工程咨询中南有限公司 | Pressure steel pipe telescopic device |
| CN109297670A (en) * | 2018-11-30 | 2019-02-01 | 济南万象轩智能科技有限公司 | A kind of pneumatic equipment bladess performance test laboratory experiment simulator |
-
1998
- 1998-11-30 CN CN 98231728 patent/CN2384087Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101449095B (en) * | 2006-05-24 | 2013-10-30 | 泰特弗莱克斯公司 | Sealing device and method with ridges for corrugated stainless steel tubing |
| CN105953001A (en) * | 2016-04-21 | 2016-09-21 | 中国水利水电建设工程咨询中南有限公司 | Pressure steel pipe telescopic device |
| CN109297670A (en) * | 2018-11-30 | 2019-02-01 | 济南万象轩智能科技有限公司 | A kind of pneumatic equipment bladess performance test laboratory experiment simulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |