CN111503403B - Constrained bellows expansion joint capable of compensating axial displacement - Google Patents
Constrained bellows expansion joint capable of compensating axial displacement Download PDFInfo
- Publication number
- CN111503403B CN111503403B CN202010259383.XA CN202010259383A CN111503403B CN 111503403 B CN111503403 B CN 111503403B CN 202010259383 A CN202010259383 A CN 202010259383A CN 111503403 B CN111503403 B CN 111503403B
- Authority
- CN
- China
- Prior art keywords
- compensation
- flange
- piston
- expansion joint
- bellows
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 51
- 238000007789 sealing Methods 0.000 claims description 11
- 230000000452 restraining effect Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 241000447495 Equulites leuciscus Species 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- 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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/022—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with a single corrugation
-
- 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
- F16L23/00—Flanged joints
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The utility model provides a can compensate constraint formula bellows expansion joint of axial displacement, includes first flange, bellows, second flange and restraint component, and first flange and second flange have been welded respectively to the both ends of bellows, and multiunit restraint component is in the outside of bellows according to circumferencial direction equipartition, restraint component include first piston, second piston and pull rod, first piston sliding fit sets up in first compensation intracavity, second piston sliding fit sets up in the second compensation intracavity, the pull rod slope sets up, is connected with first piston after the one end of pull rod passes first displacement compensation slip mouth, is connected with the second piston after the other end of pull rod passes second displacement compensation slip mouth; the problems that the conventional constraint type bellows expansion joint cannot compensate axial displacement, the outer diameter of the straight pipe pressure balance type bellows expansion joint is overlarge, the weight is heavier, and the manufacturing cost is high are solved.
Description
Technical Field
The invention relates to the technical field of expansion joints, in particular to a constraint type corrugated pipe expansion joint capable of compensating axial displacement.
Background
In order to avoid the damage of the equipment base and the influence on the normal operation of the equipment caused by the pressure thrust generated by the unbalanced bellows expansion joint, a constraint type or straight pipe pressure balance type bellows expansion joint is generally selected for constraint or balance of the pressure thrust. The conventional constraint type bellows expansion joint has two types, namely a hinge type expansion joint and a compound pull rod type expansion joint. The expansion joint (figure 1) of hinge type consists of a bellows, an end pipe and a set of restraining structural members, and is mainly used for absorbing angular displacement and restraining the pressure thrust of the bellows. The pull rod type expansion joint (figure 2) consists of a working corrugated pipe, an end pipe and a group of constraint structural members, and is mainly used for absorbing transverse displacement and being capable of constraining the pressure thrust of the corrugated pipe.
The conventional type of the existing straight pipe pressure balance type corrugated pipe expansion joint is divided into external pressure and internal pressure. The external pressure type straight pipe pressure balance expansion joint (figure 3) consists of a group of working corrugated pipes and a group of balance corrugated pipes, and is mainly used for absorbing axial displacement and balancing the pressure thrust of the corrugated pipes. The internal pressure type straight pipe pressure balance expansion joint (figure 4) consists of two working corrugated pipes, a balance corrugated pipe positioned in the middle, a pull rod, an end plate and other structural members, and is mainly used for absorbing axial displacement and balancing the pressure thrust of the corrugated pipes.
The conventional structure constraint type bellows expansion joint can only compensate angular displacement and transverse displacement, cannot compensate axial displacement, adopts a balance type bellows expansion joint to compensate axial displacement, balances pressure thrust, needs to add a group of balance waves, and meanwhile increases corresponding constraint structural members, so that the overall outer diameter of the expansion joint is overlarge, the equipment weight is heavy, and the manufacturing cost is relatively high.
Disclosure of Invention
In order to solve the technical problems, the invention provides the constraint type corrugated pipe expansion joint capable of compensating axial displacement, which solves the problems that the conventional constraint type corrugated pipe expansion joint cannot compensate axial displacement, the outer diameter of the straight pipe pressure balance type corrugated pipe expansion joint is overlarge, the weight is heavier and the manufacturing cost is high.
In order to achieve the technical purpose, the adopted technical scheme is as follows: the utility model provides a can compensate constraint bellows expansion joint of axial displacement, including first flange, the bellows, second flange and restraint component, first flange and second flange have been welded respectively to the both ends of bellows, the multiunit restraint component is in the outside of bellows according to circumferencial direction equipartition, set up the first compensation chamber that multiunit constant diameter set up on first flange, the one end and the expansion joint inner chamber intercommunication of first compensation chamber, the other end and outside air intercommunication, still set up the first displacement compensation sliding port that is linked together with first compensation chamber on the interior terminal surface of first flange, set up the second compensation chamber of multiunit constant diameter on the second flange, still set up the second displacement compensation sliding port that is linked together with second compensation chamber on the interior terminal surface of second flange; the first compensation cavities and the second compensation cavities are arranged in one-to-one correspondence, the first compensation cavities and the second compensation cavities incline to the middle part of the expansion joint, and a constraint component is arranged between each group of the first compensation cavities and the second compensation cavities which are correspondingly arranged;
The restraining component comprises a first piston, a second piston and a pull rod, wherein the first piston is arranged in the first compensation cavity in a sliding fit manner, the second piston is arranged in the second compensation cavity in a sliding fit manner, the pull rod is obliquely arranged, one end of the pull rod passes through the first displacement compensation sliding port and then is connected with the first piston, and the other end of the pull rod passes through the second displacement compensation sliding port and then is connected with the second piston;
the expansion joint satisfies the following conditions: Wherein A is the cross-sectional area of the first piston; a c is the effective area of the corrugated pipe; n is the total number of restraining members; alpha is the included angle between the first compensation cavity and the plane of the first flange, the included angle between the second compensation cavity and the plane of the second flange, the included angle between the pull rod and the axis of the first flange, and the included angle between the pull rod and the axis of the second flange.
The first piston is circular in cross-section.
The second piston has a circular cross section.
A sealing ring is sleeved on a first piston in one side of the first compensation cavity communicated with the inner cavity of the expansion joint.
The invention has the beneficial effects that: the novel constraint structure can compensate axial displacement and constrain pressure thrust generated by the corrugated pipe. The novel constraint expansion joint capable of compensating axial displacement can compensate axial displacement, constrains pressure thrust, and has the characteristics of simple structure, safety and reliability.
Drawings
FIG. 1 is a schematic view of a hinge-type expansion joint;
FIG. 2 is a schematic view of a pull rod type expansion joint;
FIG. 3 is a schematic view of the structure of an external pressure type straight pipe pressure balance expansion joint;
FIG. 4 is a schematic view of the structure of an internal pressure type straight pipe pressure balance type expansion joint;
FIG. 5 is a schematic diagram of the structure of the present invention;
FIG. 6 is a schematic diagram of an expansion joint axial compression displacement compensation mode according to the present invention;
FIG. 7 is a schematic diagram of an expansion joint axial tension displacement compensation mode according to the present invention;
FIG. 8 is a schematic view of another embodiment of the present invention;
In the figure: 1. the device comprises a first flange, 2, a constraint component, 3, a second flange, 4, a corrugated pipe, 5, a first end pipe, 6, a second end pipe, 2-1, a first piston, 2-2, a first compensation cavity, 2-3, a first displacement compensation sliding port, 2-4, a pull rod, 2-5, a second piston, 2-6, a second compensation cavity, 2-7, a second displacement compensation sliding port, 2-8 and a sealing ring.
Detailed Description
In order that those skilled in the art will better understand the solution of the present invention, the following description of the technical solution in the embodiment of the present invention will be clearly and completely described with reference to the accompanying drawings in which it is apparent that the described examples are only a part of examples, not all examples of the present invention. All other embodiments obtained by those skilled in the art based on the examples herein shall fall within the scope of the present invention without making any inventive effort.
In the description of the present embodiment, the terms "inner", "outer", "front", "rear", "left", "right", etc. indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, and are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between similar objects and should not be construed as a particular order or sequence, it being understood that such uses may be interchanged where appropriate.
As shown in fig. 5, a constraint type bellows expansion joint capable of compensating axial displacement comprises a first flange 1, a bellows 4, a second flange 3 and constraint components 2, wherein the two ends of the bellows 4 are respectively welded with the first flange 1 and the second flange 3, a plurality of groups of constraint components 2 are uniformly distributed on the outer side of the bellows 4 along the circumferential direction, a plurality of groups of first compensation cavities 2-2 which are arranged in equal diameter are arranged on the first flange 1, one end of each first compensation cavity 2-2 is communicated with an inner cavity of the expansion joint, the other end of each first compensation cavity 2-2 is communicated with the outside air, a first displacement compensation sliding port 2-3 which is communicated with the first compensation cavity 2-2 is also arranged on the inner end surface of the first flange 1, the length of each first displacement compensation sliding port 2-3 meets the distance of compensating axial displacement, a plurality of groups of second compensation cavities 2-6 which are arranged on the second flange 3, and a second displacement compensation port 2-7 which is communicated with the second compensation cavities 2-6 are also arranged on the inner end surface (the surface close to the center of the expansion joint) of the second flange 3; the first compensation cavities 2-2 and the second compensation cavities 2-6 are arranged in one-to-one correspondence, the first compensation cavities 2-2 and the second compensation cavities 2-6 are inclined towards the middle of the expansion joint, the inclination angles of the two cavities are the same, and a constraint component 2 is arranged between each group of the first compensation cavities 2-2 and the second compensation cavities 2-6 which are arranged correspondingly.
The restraining member 2 comprises a first piston 2-1, a second piston 2-5 and a pull rod 2-4, wherein the first piston 2-1 is arranged in the first compensation cavity 2-2 in a sliding fit manner, the second piston 2-5 is arranged in the second compensation cavity 2-6 in a sliding fit manner, the pull rod 2-4 is obliquely arranged, one end of the pull rod 2-4 penetrates through the first displacement compensation sliding opening 2-3 and then is connected with the first piston 2-1, and the other end of the pull rod 2-4 penetrates through the second displacement compensation sliding opening 2-7 and then is connected with the second piston 2-5.
The included angle between the planes of the first compensation cavity 2-2 and the first flange 1, the included angle between the planes of the second compensation cavity 2-6 and the second flange 3, the included angle between the pull rod 2-4 and the axis of the first flange 1 and the included angle between the pull rod 2-4 and the axis of the second flange 3 are equal, so that the normal movement during displacement compensation is ensured.
Principle of constraint: in the working state, flanges at two ends of the expansion joint are connected with a pipe system, the inside of the expansion joint is filled with medium with pressure p, and meanwhile, the medium enters a first compensation cavity 2-2 of the first flange 1. As shown in fig. 5. In order to realize pressure thrust constraint, a pressure constraint type bellows expansion joint structure needs to satisfy the following relation:
Wherein:
a is the cross-sectional area of the first piston 2-1;
A c is the effective area of the corrugated pipe (see GB/T12777-2008 standard for details);
n is the total number of restraining members 2;
alpha is the included angle between the first compensation cavity 2-2 and the plane of the first flange 1, the included angle between the second compensation cavity 2-6 and the plane of the second flange 3, the included angle between the pull rod 2-4 and the axis of the first flange 1, and the included angle between the pull rod 2-4 and the axis of the second flange 3.
The pressure thrust acts on the first flange 1 and the second flange 3, the first flange 1 and the second flange 3 are simultaneously subjected to the acting force of the restraining member 2, and the resultant force of the acting forces and the pressure thrust are equal in magnitude and opposite in direction, so that the pressure thrust can be restrained. The pressure thrust is always in a constrained state, whether the expansion joint is in the original position or any axial deformation position.
The cross section of the first piston 2-1 is circular, and the first compensation cavity 2-2 is a cylindrical cavity in the same way.
The section of the second piston 2-5 is circular, and the second compensation cavity 2-6 is a cylindrical cavity in the same way.
A sealing ring 2-8 is sleeved on the first piston 2-1 in one side of the first compensation cavity 2-2 communicated with the inner cavity of the expansion joint. The first piston 2-1 is provided with a sealing ring groove for installing a sealing ring, and the installation direction of the sealing ring is the direction close to the communication with the inner cavity of the expansion joint.
As shown in fig. 8, the first flange 1 and the second flange 3 are respectively mounted on a first end pipe 5 and a second end pipe 6 connected with a corrugated pipe, and other structures are the same as those of fig. 5, so that axial displacement compensation can be realized.
The displacement compensation mode is as follows:
(1) Axial compression displacement occurs: the pipeline is displaced, the first flange 1 and the second flange 3 are compressed to move towards the middle of the expansion joint, in order to meet the deformation coordination condition, the first flange 1 and the second flange 3 push the first piston 2-1 and the second piston 2-5 to move along the sealing cavity in the same direction, and the pressure thrust is always borne by the pull rod 2-4. The pipeline and a cavity formed by the first compensation cavity 2-2, the first piston 2-1 and the sealing ring 2-8 are filled with a medium with the pressure p; the second flange 3 seals the cavity and the cavity formed by the second piston 2-5 is pressureless air. According to the constraint principle, the pressure thrust is always kept in a constrained state in the moving process and reaching the displacement position. As shown in fig. 6.
(2) Axial tensile displacement occurs: the pipeline is displaced, the first flange 1 and the second flange 3 are stretched to move towards the middle of the expansion joint, in order to meet the deformation coordination condition, the first flange 1 and the second flange 3 push the first piston 2-1 and the second piston 2-5 to move along the sealing cavity in the same direction, and the pressure thrust is always borne by the pull rod. The pipeline and a cavity formed by the first compensation cavity 2-2, the first piston 2-1 and the sealing ring 2-8 are filled with a medium with the pressure p; the second flange 3 seals the cavity and the cavity formed by the second piston 2-5 is pressureless air. According to the constraint principle, the pressure thrust is always kept in a constrained state in the moving process and reaching the displacement position. As shown in fig. 7.
Claims (4)
1. The utility model provides a constraint bellows expansion joint that can compensate axial displacement, includes first flange (1), bellows (4), second flange (3) and restraint component (2), and first flange (1) and second flange (3) have been welded respectively to the both ends of bellows (4), and multiunit restraint component (2) are according to circumferencial direction equipartition in the outside of bellows (4), its characterized in that: a plurality of groups of first compensation cavities (2-2) with equal diameters are formed in the first flange (1), one end of each first compensation cavity (2-2) is communicated with the inner cavity of the expansion joint, the other end of each first compensation cavity is communicated with outside air, a first displacement compensation sliding port (2-3) communicated with each first compensation cavity (2-2) is formed in the inner end face of the first flange (1), a plurality of groups of second compensation cavities (2-6) with equal diameters are formed in the second flange (3), and a second displacement compensation sliding port (2-7) communicated with each second compensation cavity (2-6) is formed in the inner end face of the second flange (3); the first compensation cavities (2-2) and the second compensation cavities (2-6) are arranged in a one-to-one correspondence manner, the first compensation cavities (2-2) and the second compensation cavities (2-6) are inclined towards the middle part of the expansion joint, and a constraint component (2) is arranged between each group of the first compensation cavities (2-2) and the second compensation cavities (2-6) which are arranged in a corresponding manner;
The restraining member (2) comprises a first piston (2-1), a second piston (2-5) and a pull rod (2-4), wherein the first piston (2-1) is arranged in the first compensation cavity (2-2) in a sliding fit manner, the second piston (2-5) is arranged in the second compensation cavity (2-6) in a sliding fit manner, the pull rod (2-4) is obliquely arranged, one end of the pull rod (2-4) passes through the first displacement compensation sliding port (2-3) and then is connected with the first piston (2-1), and the other end of the pull rod (2-4) passes through the second displacement compensation sliding port (2-7) and then is connected with the second piston (2-5);
the expansion joint satisfies the following conditions: Wherein A is the cross-sectional area of the first piston (2-1); a c is the effective area of the corrugated pipe; n is the total number of restraining members (2); alpha is the plane included angle of the first compensation cavity (2-2) and the first flange (1), the plane included angle of the second compensation cavity (2-6) and the second flange (3), the axis included angle of the pull rod (2-4) and the first flange (1) and the axis included angle of the pull rod (2-4) and the second flange (3).
2. A constrained bellows expansion joint capable of compensating axial displacement as claimed in claim 1, wherein: the cross section of the first piston (2-1) is circular.
3. A constrained bellows expansion joint capable of compensating axial displacement as claimed in claim 1, wherein: the section of the second piston (2-5) is round.
4. A constrained bellows expansion joint capable of compensating axial displacement as claimed in claim 1, wherein: a sealing ring (2-9) is sleeved on the first piston (2-1) in one side of the first compensation cavity (2-2) communicated with the inner cavity of the expansion joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010259383.XA CN111503403B (en) | 2020-04-03 | 2020-04-03 | Constrained bellows expansion joint capable of compensating axial displacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010259383.XA CN111503403B (en) | 2020-04-03 | 2020-04-03 | Constrained bellows expansion joint capable of compensating axial displacement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111503403A CN111503403A (en) | 2020-08-07 |
| CN111503403B true CN111503403B (en) | 2024-04-19 |
Family
ID=71872566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010259383.XA Active CN111503403B (en) | 2020-04-03 | 2020-04-03 | Constrained bellows expansion joint capable of compensating axial displacement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111503403B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046065B (en) * | 2022-06-01 | 2024-01-19 | 中船双瑞(洛阳)特种装备股份有限公司 | Straight pipe pressure balance type corrugated pipe expansion joint with distributed floating structure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29603292U1 (en) * | 1996-02-23 | 1996-06-13 | Gesellschaft für Schwerionenforschung mbH, 64291 Darmstadt | Flange coupling for connecting vacuum containers |
| CN2725688Y (en) * | 2004-08-31 | 2005-09-14 | 中国船舶重工集团公司第七二五研究所 | Sliding sealed expansion joint |
| KR101047341B1 (en) * | 2010-11-15 | 2011-07-07 | 주식회사 동우 이앤씨 건축사사무소 | Pipe connector |
| CN103398261A (en) * | 2013-08-05 | 2013-11-20 | 洛阳双瑞特种装备有限公司 | Internal pressure type straight pipe pressure balance type expansion joint capable of compensating lateral displacement |
| CN108361464A (en) * | 2018-01-04 | 2018-08-03 | 洛阳双瑞特种装备有限公司 | A kind of pressure balanced expansion joint being slidingly sealed compensation technique based on end face |
| CN108644520A (en) * | 2018-04-12 | 2018-10-12 | 洛阳双瑞特种装备有限公司 | A kind of straight pipe pressure-balancing type expansion joint of no balance wave |
| CN109668002A (en) * | 2018-12-26 | 2019-04-23 | 洛阳双瑞特种装备有限公司 | A kind of interlayer bellows expansion joint and production method |
| CN212430130U (en) * | 2020-04-03 | 2021-01-29 | 洛阳双瑞特种装备有限公司 | Constraint type corrugated pipe expansion joint capable of compensating axial displacement |
-
2020
- 2020-04-03 CN CN202010259383.XA patent/CN111503403B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29603292U1 (en) * | 1996-02-23 | 1996-06-13 | Gesellschaft für Schwerionenforschung mbH, 64291 Darmstadt | Flange coupling for connecting vacuum containers |
| CN2725688Y (en) * | 2004-08-31 | 2005-09-14 | 中国船舶重工集团公司第七二五研究所 | Sliding sealed expansion joint |
| KR101047341B1 (en) * | 2010-11-15 | 2011-07-07 | 주식회사 동우 이앤씨 건축사사무소 | Pipe connector |
| CN103398261A (en) * | 2013-08-05 | 2013-11-20 | 洛阳双瑞特种装备有限公司 | Internal pressure type straight pipe pressure balance type expansion joint capable of compensating lateral displacement |
| CN108361464A (en) * | 2018-01-04 | 2018-08-03 | 洛阳双瑞特种装备有限公司 | A kind of pressure balanced expansion joint being slidingly sealed compensation technique based on end face |
| CN108644520A (en) * | 2018-04-12 | 2018-10-12 | 洛阳双瑞特种装备有限公司 | A kind of straight pipe pressure-balancing type expansion joint of no balance wave |
| CN109668002A (en) * | 2018-12-26 | 2019-04-23 | 洛阳双瑞特种装备有限公司 | A kind of interlayer bellows expansion joint and production method |
| CN212430130U (en) * | 2020-04-03 | 2021-01-29 | 洛阳双瑞特种装备有限公司 | Constraint type corrugated pipe expansion joint capable of compensating axial displacement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111503403A (en) | 2020-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212430130U (en) | Constraint type corrugated pipe expansion joint capable of compensating axial displacement | |
| CN111503403B (en) | Constrained bellows expansion joint capable of compensating axial displacement | |
| CN111503390B (en) | Pressure balance type bellows expansion joint | |
| EP2569568A1 (en) | In-line pressure balanced expansion joint for piping and ducting systems with circular cross section and internally located tie rods | |
| CN108468895B (en) | A kind of straight pipe pressure-balancing type expansion joint with three-dimensional compensation | |
| CN106197808B (en) | A kind of positioning of no thrust bearing rotor and axial-force testing device | |
| CN110685370A (en) | Device for improving synchronism of viscous damper | |
| CN212430073U (en) | Pressure balance type bellows expansion joint | |
| US3961815A (en) | Leak-tight ball-and-socket connecting device transmitting torques and stresses between two pipes | |
| CN116658709B (en) | Multi-rib reinforced winding corrugated pipe | |
| CN217603622U (en) | Straight pipe pressure balance type bellows expansion joint with distributing type floating structure | |
| CN102359186B (en) | Temperature stress control expansion joint | |
| CN111795249B (en) | Compensator and application thereof | |
| CN109812629A (en) | The improved device of double wall corrugated high-density polyethylene pipes | |
| CN111810754B (en) | Straight pipe pressure balance type expansion joint applied to large-diameter pipeline compensation | |
| CN112033632B (en) | Overload-proof compensator capable of bearing atmosphere dynamic load | |
| CN108644520A (en) | A kind of straight pipe pressure-balancing type expansion joint of no balance wave | |
| CN209671787U (en) | The improved device of double wall corrugated high-density polyethylene pipes | |
| CN211315109U (en) | Mechanical sealing device for compressor | |
| CN115046065B (en) | Straight pipe pressure balance type corrugated pipe expansion joint with distributed floating structure | |
| CN217382140U (en) | Straight pipe pressure balance type expansion joint with floating structure | |
| CN220320131U (en) | Coupling with good stability | |
| CN214305775U (en) | Freely-deformable telescopic pipeline | |
| CN218718883U (en) | Pneumatic butterfly valve convenient to assemble | |
| CN216642839U (en) | Coupling suitable for large torque |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Applicant after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Applicant before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |