CN114151634B - Temperature compensator for clamping and pressing type pipeline system - Google Patents
Temperature compensator for clamping and pressing type pipeline system Download PDFInfo
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- CN114151634B CN114151634B CN202111500706.0A CN202111500706A CN114151634B CN 114151634 B CN114151634 B CN 114151634B CN 202111500706 A CN202111500706 A CN 202111500706A CN 114151634 B CN114151634 B CN 114151634B
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- 238000007789 sealing Methods 0.000 claims abstract description 149
- 230000002093 peripheral effect Effects 0.000 claims abstract description 43
- 238000003780 insertion Methods 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 5
- 230000008602 contraction Effects 0.000 description 9
- 230000013011 mating Effects 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention provides a temperature compensator for a clamping and pressing type pipeline system, and belongs to the technical field of pipelines. It has solved the problem that life is short. The temperature compensator for the clamping and pressing type pipeline system comprises an outer pipe with one end being a matched end and an inner pipe with one end being a plug-in end and being inserted into the matched end of the outer pipe, wherein a first sealing element and a second sealing element which are annular are sequentially arranged in the matched end of the outer pipe along the insertion direction of the inner pipe, a gap is reserved between the outer peripheral wall of the inner pipe and the inner peripheral wall of the outer pipe, a first sealing part is arranged on the first inner peripheral wall of the sealing element in a protruding mode, a protruding arc surface is arranged on the first sealing part, which is in contact with the outer peripheral wall of the plug-in end of the inner pipe, in the direction close to the axis of the inner pipe, a second sealing part is arranged on the protruding inner peripheral wall of the second sealing element, an annular matching groove is formed in the outer peripheral wall of the plug-in end of the inner pipe, and the second sealing part is embedded in the annular matching groove and is in contact with the groove bottom wall of the annular matching groove. The temperature compensator for the clamping and pressing type pipeline system has the advantages of long service life, strong function and the like.
Description
Technical Field
The invention belongs to the technical field of pipelines, and relates to a temperature compensator for a clamping and pressing type pipeline system.
Background
In the existing pipeline system, when the temperature of the pipeline changes, expansion and contraction can occur, and at the moment, if the pipeline cannot freely expand or contract along with the temperature change, thermal stress can be generated in the pipeline. Such stresses must therefore be considered in the design of the pipe, which might otherwise lead to breakage of the pipe, affecting the normal transport of the medium. At present, in order to prevent the pipeline from deforming or damaging due to thermal elongation or temperature stress when the pipeline is heated, a temperature compensator is connected to the pipeline to be matched with the pipeline.
For example, a stainless steel piston type pipeline temperature compensator disclosed in patent application number 200410040945.2 is characterized in that a stainless steel inner sleeve with a piston rod with a boss section and at least one sealing ring is inserted into the outer sleeve, and a gap distance is reserved between the two pipes so that the two pipes can slide relatively along the axial direction, thereby realizing expansion and contraction to compensate for expansion and contraction of a pipeline when the temperature of the pipeline changes. However, the pipe tends to vibrate during the process of conveying the medium, and the pipe temperature compensator can only realize free expansion and contraction in the axial direction, but cannot enable the inner pipe or the outer pipe to freely swing along with the vibration of the pipe, and at the moment, the inner pipe or the outer pipe is hard pulled and deformed due to the vibration of the pipe, so that the service life is shortened.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a temperature compensator for a clamping and pressing type pipeline system, which solves the problem of short service life.
The aim of the invention can be achieved by the following technical scheme:
the temperature compensator for the clamping and pressing type pipeline system comprises an outer pipe with one end being a matched end and an inner pipe with one end being a plug-in end and being inserted into the matched end of the outer pipe, wherein a first sealing element and a second sealing element which are annular are sequentially arranged in the matched end of the outer pipe along the insertion direction of the inner pipe, the temperature compensator is characterized in that a gap is reserved between the outer peripheral wall of the inner pipe and the inner peripheral wall of the outer pipe, the inner peripheral wall of the first sealing element is convexly provided with a first sealing part, the first sealing part is in contact with the outer peripheral wall of the plug-in end of the inner tube and is an arc surface protruding towards the direction close to the axis of the inner tube, the second sealing part is provided with a second sealing part in a protruding mode, the outer peripheral wall of the plug-in end of the inner tube is provided with an annular matching groove, the second sealing part is embedded in the annular matching groove and is in contact with the groove bottom wall of the annular matching groove, and a gap enabling the inner tube and the outer tube to move relatively along the axial direction is reserved between the second sealing part and the groove wall of at least one side of the annular matching groove.
When in use, the two stainless steel pipes to be connected are respectively connected with the other ends of the inner pipe and the outer pipe. Because the gap is arranged between the groove walls at the two sides of the annular matching groove and the second sealing part, the inner pipe or the outer pipe can move along the axial direction, and therefore, the maximum expansion and contraction amount is calculated in advance according to a formula of the compensation amount of the pipeline, the size of the gap is designed according to the expansion and contraction amount (taking a DN25 pipe as an example, the maximum expansion and contraction amount is about 12mm generally), the temperature compensator can ensure that the temperature compensator meets the axial expansion and contraction amount when the actual temperature changes, and the first sealing part and the second sealing part act simultaneously, so that the inner pipe is supported in a normal state to avoid deflection. Meanwhile, the contact part of the first sealing part and the outer peripheral wall of the plug-in end of the inner pipe is an arc surface protruding in the direction close to the axis of the inner pipe, so that the first sealing part can be deformed easily when being stressed, and gaps are reserved between the groove walls on the two sides of the upper annular matching groove and the groove walls on the two sides of the second sealing part, so that the inner pipe or the outer pipe can swing at corresponding angles along with the vibration of the pipeline, and the hard extrusion between the inner pipe and the outer pipe is avoided, so that the service life is prolonged. Moreover, the space capable of swinging is relatively large due to the structure, and if no gap exists, the whole annular matching groove is filled by the second sealing part, so that the space capable of swinging is small.
In the temperature compensator for the clamping and pressing type pipeline system, the cross section of the sealing part I is circular crown type or semicircular type.
The cross section of the first sealing part is circular crown type or semicircular type, so that the cross section edge of the first sealing part is an outer convex arc surface, and the circular crown type or semicircular type is easier to be extruded and deformed when the pipeline shakes so as to enable the inner pipe or the outer pipe to swing correspondingly.
In the temperature compensator for the clamping and pressing type pipeline system, the cross section of the first sealing element is square, the first sealing part is positioned in the middle of the first sealing element along the axial direction of the outer pipe, and the distance between the two ends of the circular arc in the cross section of the first sealing part is 1/3-1/2 of the thickness of the first sealing element along the axial direction of the outer pipe.
Through the arrangement, the deformation capacity of the first sealing part can be further improved, so that the inner pipe or the outer pipe can swing more easily and at a larger angle when the pipeline shakes, and the applicability of the temperature compensator for the clamping and pressing type pipeline system is improved.
In the temperature compensator for the clamping and pressing type pipeline system, the second sealing part is in an annular block shape, and the distance between two side walls of the annular matching groove is larger than the distance between two side walls of the second sealing part.
The annular block shape enables the second sealing part to have a certain thickness, so that the second sealing part can form surface contact with the outer peripheral wall of the inner pipe at the annular matching groove, and the sealing effect is improved. The distance between the groove walls at the two sides of the annular matching groove is larger than the distance between the two side walls of the sealing part, so that the required clearance for the inner pipe to move axially relative to the outer pipe is ensured.
In the temperature compensator for the clamping and pressing type pipeline system, one end, close to the center line of the outer pipe, of the groove wall of one side, adjacent to the sealing element I, of the sealing part II is obliquely arranged in a direction away from the sealing element.
The purpose of this arrangement is to ensure that the inner tube can be more easily assembled with the outer tube while improving the sealing effect by surface contact, because the first and second seals are mounted in the mating ends of the outer tube, the inclined arrangement of the side walls of the second seal can act as a guide to reduce drag when the inner tube is inserted into the outer tube, enabling the inner tube to more easily push past the second seal in the form of an annular block.
In the temperature compensator for the clamping and pressing type pipeline system, the cross section of the sealing part II is in an isosceles trapezoid shape, the distance between two edges of the isosceles trapezoid is gradually reduced towards the direction close to the central line of the outer pipe, the distance between two side groove walls of the annular matching groove is gradually reduced towards the direction close to the central line of the outer pipe, and the two side groove walls of the annular matching groove are parallel to the two corresponding side walls of the sealing part II.
Through the arrangement, the inner pipe or the outer pipe can swing more easily while the assembly convenience is ensured, and the applicability of the temperature compensator is improved.
In the temperature compensator for the clamping and pressing type pipeline system, the section of the second sealing element is square, the two side walls of the second sealing part and the two side walls of the second sealing element are respectively connected with the yielding surfaces which are obliquely arranged, the distance between the two yielding surfaces is gradually reduced towards the direction close to the central line of the outer pipe, and the inclination angle of the yielding surfaces is larger than that of the corresponding side walls of the second sealing part.
The design of the abdication surface can form abdication for the connection part of the groove walls at the two sides of the annular matching groove and the outer wall of the plug-in end when the inner pipe or the outer pipe swings, so that the swinging angle of the inner pipe or the outer pipe is further increased.
The temperature compensator for the clamping and pressing type pipeline system comprises an outer pipe with one end being a matched end and an inner pipe with one end being a plug-in end and being inserted into the matched end of the outer pipe, wherein the plug-in end of the inner pipe is sequentially provided with a first sealing element and a second sealing element which are annular along the insertion direction of the plug-in end of the inner pipe, the temperature compensator is characterized in that a gap is reserved between the outer peripheral wall of the inner pipe and the inner peripheral wall of the outer pipe, the outer peripheral wall of the first sealing element is convexly provided with a first sealing part, the contact part of the first sealing part and the inner peripheral wall of the matching end of the outer tube is an arc surface protruding towards the direction far away from the axis of the outer tube, the outer peripheral wall of the second sealing part is provided with a second sealing part in a protruding mode, the inner peripheral wall of the matching end of the outer tube is provided with an annular groove, the second sealing part is embedded into the annular groove and is contacted with the groove bottom wall of the annular groove, and a gap enabling the inner tube and the outer tube to move relatively along the axial direction is formed between the second sealing part and the groove wall of at least one side of the annular groove.
Compared with the prior art, the temperature compensator for the clamping and pressing type pipeline system has the following advantages:
1. By arranging gaps between the groove walls at the two sides of the annular matching groove and the second sealing part, the inner pipe and the outer pipe can relatively move along the axial direction, so that the compensation function of the pipeline when the temperature changes is ensured;
2. The contact part of the first sealing part and the outer peripheral wall of the plugging end of the inner tube is arranged to be an arc surface protruding towards the direction close to the axis of the inner tube, the first sealing part can be deformed easily when being stressed, and gaps are reserved between the groove walls on the two sides of the upper annular matching groove and the groove wall on at least one side of the second sealing part, so that the inner tube or the outer tube can swing at a corresponding angle along with the vibration of the pipeline, and the hard extrusion between the inner tube and the outer tube is avoided, so that the service life is prolonged.
Drawings
Fig. 1 is a schematic cross-sectional view of a first embodiment of a temperature compensator for the present clamp-on piping system.
Fig. 2 is an enlarged view at a in fig. 1.
Fig. 3 is an exploded cross-sectional schematic view of a first embodiment of a temperature compensator for the present clamp-on piping system.
Fig. 4 is a cross-sectional view of a second seal member in a first embodiment of the present pressure-clamping type pipe system.
In the figure, 1, an outer tube; 1a, a mating end; 2. an inner tube; 2a, a plug end; 2a1, annular mating grooves; 3. a first sealing element; 3a, a first sealing part; 4. a second sealing element; 4a, a second sealing part; 4b, giving way surface.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example 1
As shown in fig. 1 and fig. 4, the temperature compensator for a clamping and pressing type pipeline system comprises an outer pipe 1 with one end being a matching end 1a and an inner pipe 2 with one end being a plugging end 2a and being inserted into the matching end 1a of the outer pipe 1, wherein the other ends of the outer pipe 1 and the inner pipe 2 are clamping and pressing connection ends for being fixed with a thin-wall stainless steel pipe in a clamping and pressing mode. The inner tube 2 is provided with a first annular mounting groove and a second annular mounting groove along the insertion direction of the inner tube 2 in the matching end 1a of the outer tube 1, a first sealing element 3 is arranged in the first annular mounting groove, a second sealing element 4 is arranged in the second annular mounting groove, the first sealing element 3 and the second sealing element 4 are annular, the outer diameter of the inserting end 2a of the inner tube 2 is smaller than the inner diameter of the matching end 1a of the outer tube 1, and the first sealing element 3 and the second sealing element 4 are matched with the inserting end 2a of the inner tube 2 simultaneously to form sealing.
Specifically, as shown in fig. 1 to 3, a gap is formed between the outer peripheral wall of the inner tube 2 and the inner peripheral wall of the outer tube 1, the inner peripheral wall of the first sealing member 3 is provided with a first sealing portion 3a in a protruding manner, the first sealing portion 3a is annular, and the contact portion between the first sealing portion 3a and the outer peripheral wall of the plug-in end 2a of the inner tube 2 is an arc surface protruding toward the axis direction close to the inner tube 2. In this embodiment, the cross section of the sealing part 3a is circular crown or semicircle, the cross section of the sealing part 3 is square, the sealing part 3a is located at the middle of the sealing part 3 along the axial direction of the outer tube 1, and the distance between two ends of the circular arc in the cross section of the sealing part 3a is 1/3-1/2 of the thickness of the sealing part 3 along the axial direction of the outer tube 1, specifically, may be 1/3, 1/2 or 3/7. The inner peripheral wall of the second sealing piece 4 is provided with a second annular sealing part 4a in a protruding mode, the outer peripheral wall of the inserting end 2a of the inner tube 2 is provided with an annular matching groove 2a1, the second sealing part 4a is embedded into the annular matching groove 2a1, the second sealing part 4a is in surface contact with the outer peripheral wall of the inner tube 2 at the annular matching groove 2a1, and a gap enabling the inner tube 2 or the outer tube 1 to axially float is reserved between the second sealing part 4a and the groove walls on two sides of the annular matching groove 2a 1.
As shown in fig. 1-4, the second sealing portion 4a is in a ring-shaped block shape, so that the second sealing portion 4a has a certain thickness and can form surface contact with the outer peripheral wall of the inner tube 2 at the position of the annular matching groove 2a1 to improve the sealing effect, and the distance between the groove walls at two sides of the annular matching groove 2a1 is greater than the distance between the corresponding two side walls of the second sealing portion 4a, so that the inner tube 2 can move along the axial direction. The end of the groove wall of the side, adjacent to the center line of the outer tube 1, of the sealing part two 4a and the sealing part one 3 is obliquely arranged in a direction away from the sealing part one 3, so that the inner tube 2 can be assembled with the outer tube 1 more easily while the sealing effect is improved through surface contact, because the sealing part one 3 and the sealing part two 4 are arranged in the matched end 1a of the outer tube 1, the oblique arrangement of the side wall of the sealing part two 4a can play a guiding role to reduce resistance when the inner tube 2 is inserted into the outer tube 1, and the inner tube 2 can be extruded through the sealing part two 4a in the shape of an annular block more easily. In this embodiment, the cross section of the second sealing portion 4a is in the shape of an isosceles trapezoid in which the distance between the two sides of the second sealing portion is gradually reduced toward the direction approaching the center line of the outer tube 1, the distance between the two side walls of the annular fitting groove 2a1 is gradually reduced toward the direction approaching the center line of the outer tube 1, and the two side walls of the annular fitting groove 2a1 are parallel to the two corresponding side walls of the second sealing portion 4a. The cross section of the second sealing element 4 is square, the thickness of the second sealing element 4 along the axial direction of the outer tube 1 is larger than that of the second sealing element 4a, two side walls of the second sealing element 4a and two side walls of the second sealing element 4 are respectively connected with a yielding surface 4b which is obliquely arranged, the distance between the two yielding surfaces 4b is gradually reduced towards the direction close to the central line of the outer tube 1, and the inclination angle of the yielding surfaces 4b is larger than that of the corresponding side walls of the second sealing element 4a.
When in use, the two stainless steel pipes to be connected are respectively inserted into the clamping connection ends of the inner pipe 2 and the outer pipe 1 and are clamped and fixed by the clamping tool. Because the clearance is arranged between the groove walls at the two sides of the annular matching groove 2a1 and the two side walls of the sealing part two 4a, the inner pipe 2 or the outer pipe 1 can move along the axial direction, so that the axial expansion and contraction amount of the temperature compensator can be ensured to meet the actual temperature change only by designing the size of the clearance, and the inner pipe 2 is supported in a normal state to avoid deflection due to the simultaneous action of the sealing part one 3a and the sealing part two 4 a. Meanwhile, the cross section of the sealing part I3 a is in a circular crown shape or a semicircular shape and can be deformed easily, and gaps are reserved between the groove walls on the two sides of the upper annular matching groove 2a1 and the groove walls on the two sides of the sealing part II 4a, so that when the pipe groove vibrates, the inner pipe 2 or the outer pipe 1 can swing at a corresponding angle, and hard extrusion between the inner pipe 2 and the outer pipe 1 is avoided, and the service life is prolonged.
Example two
The present embodiment is basically the same in structure and principle as the first embodiment, except that: in this embodiment, the first sealing member 3 and the second sealing member 4 are disposed outside the insertion end 2a of the inner tube 2, the first sealing member 3a is disposed on the outer peripheral wall of the first sealing member 3 in a protruding manner, the second sealing member 4a is disposed on the outer peripheral wall of the second sealing member 4 in a protruding manner, a gap is formed between the outer peripheral wall of the inner tube 2 and the inner peripheral wall of the outer tube 1, the first sealing member 3 is disposed on the outer peripheral wall of the first sealing member 3 in a protruding manner, a contact portion between the first sealing member 3a and the inner peripheral wall of the mating end 1a of the outer tube 1 is an arc surface protruding in a direction away from the axis of the outer tube 1, the second sealing member 4 is disposed on the outer peripheral wall of the sealing member in a protruding manner, an annular groove is disposed on the inner peripheral wall of the mating end 1a of the outer tube 1, the second sealing member 4a is embedded in the annular groove and contacts with the groove bottom wall of the annular groove, and a gap is formed between the second sealing member 4a and at least one side of the groove wall of the annular groove, which enables the inner tube 2 and the outer tube 1 to move relatively in an axial direction. The fitting manner of the second seal portion 4a with the annular groove refers to the fitting manner of the second seal portion 4a with the annular fitting groove 2a1 in the first embodiment.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (3)
1. The temperature compensator for the clamping and pressing type pipeline system comprises an outer pipe (1) with one end being a matching end (1 a) and an inner pipe (2) with one end being a plugging end (2 a) and being inserted into the matching end (1 a) of the outer pipe (1), wherein a first annular sealing element (3) and a second annular sealing element (4) are sequentially arranged in the matching end (1 a) of the outer pipe (1) along the inserting direction of the inner pipe (2), the temperature compensator is characterized in that a gap is reserved between the outer peripheral wall of the inner pipe (2) and the inner peripheral wall of the outer pipe (1), a first sealing part (3) is arranged on the bulge of the inner peripheral wall of the sealing element (3), the contact part of the outer peripheral wall of the sealing part (3 a) with the plugging end (2 a) of the inner pipe (2) is an arc surface which bulges towards the direction close to the axis direction of the inner pipe (2), a second sealing part (4 a) is arranged on the bulge of the inner peripheral wall of the sealing element (4), an annular matching groove (2 a 1) is arranged on the outer peripheral wall of the plugging end (2 a) of the inner pipe (2), the second sealing part (4 a) is embedded in the annular matching groove (2 a 1) and is in the annular matching groove and is in the gap between the annular groove (2 a) and the inner peripheral wall of the annular groove (2 a) and the opposite to the annular groove (1 a) along the axial gap, the distance between the two side walls of the annular matching groove (2 a 1) is larger than the distance between the two side walls of the sealing part II (4 a), the cross section of the sealing part II (4 a) is an isosceles trapezoid with the distance between the two sides gradually shrinking towards the direction close to the central line of the outer tube (1), the distance between the two side walls of the annular matching groove (2 a 1) gradually shrinking towards the direction close to the central line of the outer tube (1), the two side walls of the annular matching groove (2 a 1) are parallel to the two side walls corresponding to the sealing part II (4 a), the cross section of the sealing part II (4) is square, the two side walls of the sealing part II (4 a) and the two side walls of the sealing part II (4) are respectively connected with a yielding surface (4 b) which is obliquely arranged, the distance between the two yielding surfaces (4 b) gradually shrinking towards the direction close to the central line of the outer tube (1), and the inclination angle of the yielding surface (4 b) is larger than the corresponding side walls of the sealing part II (4 a).
2. A temperature compensator for a clamping and pressing type pipe system according to claim 1, wherein the cross section of the sealing part one (3 a) is circular crown type or semicircular type.
3. A temperature compensator for a clamping and pressing type pipeline system according to claim 2, wherein the cross section of the first sealing member (3) is square, the first sealing member (3 a) is positioned at the middle part of the first sealing member (3) along the axial direction of the outer pipe (1), and the distance between the two ends of the circular arc in the cross section of the first sealing member (3 a) is 1/3-1/2 of the thickness of the first sealing member (3) along the axial direction of the outer pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111500706.0A CN114151634B (en) | 2021-12-09 | 2021-12-09 | Temperature compensator for clamping and pressing type pipeline system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111500706.0A CN114151634B (en) | 2021-12-09 | 2021-12-09 | Temperature compensator for clamping and pressing type pipeline system |
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| Publication Number | Publication Date |
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| CN114151634A CN114151634A (en) | 2022-03-08 |
| CN114151634B true CN114151634B (en) | 2024-09-03 |
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| CN202111500706.0A Active CN114151634B (en) | 2021-12-09 | 2021-12-09 | Temperature compensator for clamping and pressing type pipeline system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114992408B (en) * | 2022-08-01 | 2022-09-30 | 中国航发沈阳发动机研究所 | Pipeline connecting structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190700A (en) * | 2002-12-06 | 2004-07-08 | Waterworks Technology Development Organization Co Ltd | Structure of expansion joint |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2121598U (en) * | 1992-04-20 | 1992-11-11 | 崔荣祥 | Pipe line extension device |
| JPH1194163A (en) * | 1997-09-17 | 1999-04-09 | Kubota Corp | Elastic detachment prevention coupling |
| JPH1194153A (en) * | 1997-09-19 | 1999-04-09 | Kubota Corp | Elastic detachment prevention coupling |
| CN103174889B (en) * | 2009-01-27 | 2015-03-11 | 株式会社久保田 | Pipe joint |
| DE102015203851A1 (en) * | 2015-03-04 | 2016-09-08 | Contitech Techno-Chemie Gmbh | joint assembly |
| CN213982460U (en) * | 2020-11-18 | 2021-08-17 | 浙江班尼戈智慧管网股份有限公司 | Temperature compensator of clamping and pressing type connecting pipeline |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190700A (en) * | 2002-12-06 | 2004-07-08 | Waterworks Technology Development Organization Co Ltd | Structure of expansion joint |
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