CN212430073U - Pressure balance type bellows expansion joint - Google Patents
Pressure balance type bellows expansion joint Download PDFInfo
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- CN212430073U CN212430073U CN202020478073.2U CN202020478073U CN212430073U CN 212430073 U CN212430073 U CN 212430073U CN 202020478073 U CN202020478073 U CN 202020478073U CN 212430073 U CN212430073 U CN 212430073U
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Abstract
A pressure balance type corrugated pipe expansion joint comprises an axial expansion joint main body and n groups of balance components which are uniformly distributed on the outer side of the expansion joint main body; the axial type expansion joint main part includes the upper flange, lower flange and bellows subassembly, balanced component is including pressure-bearing promotion subassembly and two sliding assembly, the central point that the pressure-bearing promoted the subassembly and corresponds the axial type expansion joint main part puts the setting, it includes a balancing body that has balanced chamber, communicating pipe and connecting rod two, two sliding assembly are the symmetry along connecting rod two and set up, this patent has adopted a novel balanced structure, conventional balanced ripples has been cancelled, the expansion joint external diameter can reduce more than 40%, has alleviateed expansion joint weight by a wide margin, and the cost is saved. The novel straight pipe pressure balance type expansion joint can compensate axial displacement and has the characteristics of simple structure, safety and reliability.
Description
Technical Field
The utility model relates to an expansion joint technical field, what specifically say so is a pressure balance type bellows expansion joint.
Background
In order to avoid the problem that the pressure thrust generated by the unconstrained corrugated pipe expansion joint acts on equipment to cause damage to an equipment base and influence the normal work of the equipment, the straight pipe pressure balance type corrugated pipe expansion joint is usually selected for use and used for constraining the pressure thrust. The existing straight pipe pressure corrugated pipe balanced expansion joint is divided into external pressure and internal pressure in a conventional mode. The external pressure type straight pipe pressure balance type expansion joint (figure 9) is composed 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 type expansion joint (figure 10) is composed of two working corrugated pipes and 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 pressure thrust of the corrugated pipes and balancing the pressure thrust of the corrugated pipes.
For realizing pressure balance, the straight pipe pressure balance type corrugated pipe expansion joint with the conventional structure needs to be additionally provided with a group of balance waves for balancing pressure thrust besides the working waves meeting the displacement compensation requirements, and meanwhile, corresponding constraint structural members are added, so that the manufacturing cost is relatively high. For the internal pressure type straight pipe pressure balance type expansion joint, the outer diameter of the balance wave is far larger than that of the working wave, so that the overall outer diameter of the expansion joint is too large, and the weight of equipment is heavy.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a pressure balance type bellows expansion joint has solved the too big, heavier, the high problem of manufacturing cost of conventional straight tube pressure balance type bellows expansion joint external diameter.
In order to realize the technical purpose, the adopted technical scheme is as follows: a pressure balance type corrugated pipe expansion joint comprises an axial expansion joint main body and n groups of balance components which are uniformly distributed on the outer side of the expansion joint main body;
the axial expansion joint main body comprises an upper flange, a lower flange and a corrugated pipe assembly, wherein two ends of the corrugated pipe assembly are respectively connected with the upper flange and the lower flange, and the corrugated pipe assembly is formed by connecting an even number of sections of corrugated pipes and a middle pipe connected with adjacent corrugated pipes in series;
the balance member comprises a pressure-bearing pushing assembly and two sliding assemblies, the pressure-bearing pushing assembly is arranged corresponding to the center of the axial expansion joint main body and comprises a balance body with a balance cavity, a communicating pipe and a second connecting rod, one end of the balance cavity of the balance body is communicated with the inner cavity of the axial expansion joint main body through the communicating pipe, the other end of the balance body is connected with the second connecting rod, the balance body stretches and retracts according to the pressure of the inner cavity of the axial expansion joint main body, the size of the balance cavity is changed, and therefore the second connecting rod is pushed or pulled back to move along the radial direction of the axial expansion joint main body;
the two sliding assemblies are symmetrically arranged along the second connecting rod, each sliding assembly consists of a sliding rail arranged on the upper flange or the lower flange, a first connecting rod and a rolling body, a sliding rail groove is formed in each sliding rail, the sliding rail grooves are arranged along the radial direction of the upper flange or the lower flange and are obliquely arranged, the sliding rail grooves and the plane of the upper flange or the lower flange form an included angle theta, the rolling bodies are rotatably connected to one end of the first connecting rod and matched with the sliding rail grooves and are arranged in the sliding rail grooves in a rolling mode, the other end of the first connecting rod is connected with the second connecting rod, and the first connecting rods and the second connecting rod form included angles beta;
the axial type expansion joint main body and the balance member satisfy the following relation:
in the formula:
Acp-balancing the effective area of the body;
Acg-the effective area of the bellows assembly.
The balance body is a balance corrugated pipe, two ends of the balance corrugated pipe are hermetically connected with a first seal plate and a second seal plate, the communicating pipe penetrates through the second seal plate and then is communicated with a balance cavity of the corrugated pipe, and the first seal plate is connected with a second connecting rod.
The balance body consists of a cylinder body and a piston, one end of the piston is connected with the second connecting rod, and a balance cavity is enclosed between the other end of the piston and the inner wall of the cylinder body.
The rolling body is a roller or a rolling bearing.
The utility model has the advantages that: the utility model relates to a new-type pressure balance type bellows expansion joint has adopted a novel balanced structure, has cancelled conventional balanced ripples, and the expansion joint external diameter can reduce more than 40%, has alleviateed expansion joint weight by a wide margin, has practiced thrift the cost. The novel straight pipe pressure balance type expansion joint can compensate axial displacement and has the characteristics of simple structure, safety and reliability.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a diagram of the compression displacement compensation scheme of FIG. 1;
FIG. 3 is a diagram of the compensation of the tension shift of FIG. 1;
fig. 4 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of embodiment 3 of the present invention;
FIG. 6 is a diagram of the compression displacement compensation scheme of FIG. 5;
FIG. 7 is a diagram of the compensation of the tension shift of FIG. 5;
fig. 8 is a schematic structural view of embodiment 4 of the present invention;
FIG. 9 is a schematic structural diagram of a conventional external pressure straight pipe pressure-balanced expansion joint;
FIG. 10 is a schematic structural view of a conventional internal pressure straight pipe pressure-balanced expansion joint;
in the figure: 1. the device comprises an upper flange, 2, a balance component, 3, a corrugated pipe, 4, a middle pipe, 5, a lower flange, 6, a first end pipe, 7, a second end pipe, 2-1, a sliding rail groove, 2-2, a rolling body, 2-3, a pin shaft, 2-4, a first connecting rod, 2-5, a second connecting rod, 2-6, a balance body, 2-6-1, a balance corrugated pipe, 2-6-2, a piston, 2-6-3, a cylinder body, 2-6-4, a first seal plate, 2-6-5, a second seal plate, 2-6-6, a seal ring, 2-7 and a communicating pipe.
Detailed Description
A pressure balance type corrugated pipe expansion joint comprises an axial expansion joint main body and n groups of balance members 2 which are uniformly distributed on the outer side of the expansion joint main body, wherein n is more than or equal to 2.
The axial expansion joint main body comprises an upper flange 1, a lower flange 5 and a corrugated pipe assembly, wherein the two ends of the corrugated pipe assembly are respectively connected with the upper flange 1 and the lower flange 5, the upper flange 1 and the lower flange 5 are used for being connected with pipe systems on two sides through bolts, the corrugated pipe assembly is formed by connecting an even number of corrugated pipes 3 and intermediate pipes 4 connected with adjacent corrugated pipes 3 in series, and the corrugated pipe assembly is in a connection mode, so that a part located in the middle is always an intermediate pipe, and the corrugated pipe assembly is conveniently communicated with a balance member.
The balance member 2 comprises a pressure-bearing pushing assembly and two sliding assemblies, the pressure-bearing pushing assembly is arranged corresponding to the center of the axial expansion joint main body and ensures that pressure pushing is pushed by the center of the expansion joint, the pressure-bearing pushing assembly comprises a balance body 2-6 with a balance cavity, a communication pipe 2-7 and a connecting rod two 2-5, one end of the balance cavity of the balance body 2-6 is communicated with the inner cavity of the axial expansion joint main body through the communication pipe 2-7, the other end of the balance body 2-6 is connected with the connecting rod two 2-5, the balance body 2-6 stretches and retracts according to the pressure of the inner cavity of the axial expansion joint main body, the size of the balance cavity is changed, and therefore the connecting rod two 2-5 is pushed or pulled back to move along the radial direction of the axial expansion joint main body.
The two sliding components are symmetrically arranged along the connecting rod II 2-5, each sliding component consists of a sliding rail 2-1 arranged on the upper flange 1 or the lower flange 5, a connecting rod I2-4 and a rolling element 2-2, a sliding rail groove 2-1-1 is arranged on the sliding rail 2-1, the sliding rail groove 2-1-1 is arranged along the radial direction of the upper flange 1 or the lower flange 5 and is obliquely arranged, an included angle theta is formed between the sliding rail groove 2-1-1 and the plane of the upper flange 1 or the lower flange 5, the rolling element 2-2 is rotatably connected at one end of the connecting rod I2-4, the connecting rods I2-4 are matched with the sliding rail grooves 2-1-1 and are arranged in the sliding rail grooves 2-1-1 in a rolling mode, the other ends of the connecting rods I2-4 are connected with connecting rods II 2-5, and the two connecting rods I2-4 and the connecting rods II 2-5 form beta included angles; through the pushing or pulling of the pressure-bearing pushing assembly, the two sliding assemblies move together, and the pressure balance is realized.
The axial type expansion joint main body and the balance member 2 satisfy the following relational expressions:
in the formula:
Acp-balancing the effective area of the body;
Acg-the effective area of the bellows assembly.
When the balance body 2-6 is the balance corrugated pipe 2-6-1, two ends of the balance corrugated pipe 2-6-1 are hermetically connected with a sealing plate I2-6-4 and a sealing plate II 2-6-5, the communicating pipe 2-7 penetrates through the sealing plate II 2-6-5 and then is communicated with a balance cavity of the balance corrugated pipe 2-6-1, and the sealing plate I2-6-4 is connected with a connecting rod II 2-5.
When the balancing body 2-6 consists of the cylinder body 2-6-3 and the piston 2-6-2, one end of the piston 2-6-2 is connected with the connecting rod II 2-5, and a balancing cavity is defined between the other end of the piston 2-6-2 and the inner wall of the cylinder body 2-6-3.
The rolling bodies 2-2 are roller wheels or rolling bearings, and the rolling bodies 2-2 are ensured to stably slide in the slide rail grooves 2-1-1.
Example 1
A pressure balanced bellows expansion joint comprising: upper flange 1, balancing component 2, bellows 3, intermediate pipe 4, lower flange 5. Wherein the balance member 2 comprises: 2-1 parts of sliding rails, 2-3 parts of rollers, 2-3 parts of pin shafts, 2-4 parts of first connecting rods, 2-5 parts of second connecting rods, 2-6-2 parts of pistons, 2-6-6 parts of sealing rings, 2-6-3 parts of cylinder bodies and 2-7 parts of communicating pipes.
The corrugated pipe assembly is connected with the upper flange 1 and the lower flange 5 in a welding mode, an even number of corrugated pipes 3 and the middle pipe 4 of the corrugated pipe assembly are welded in series to form an axial expansion joint main body, two ends of the balance members 2 are respectively connected with the upper flange 1 and the lower flange 5 through sliding rails 2-1, and the communicating pipes 2-7 are communicated with the middle pipe 4. The balance members 2 are circumferentially and uniformly distributed outside the corrugated pipe assembly.
The balance member 2 is composed of and connected with: the balance component 2 is in a symmetrical structure along the second connecting rod 2-5. The upper end slide rail 2-1 is fixedly connected with the lower surface of the upper flange 1 and is arranged along the radial direction, the upper end slide rail 2-1 is provided with a slide rail groove 2-1-1, and the slide rail groove 2-1-1 is obliquely arranged and forms an included angle theta with the plane of the upper flange 1 along the radial direction of the upper flange 1. The roller is arranged in a slide rail groove of the slide rail 2-1 and can freely roll along the slide rail groove, and the roller is connected with the connecting rod I2-4 through a pin shaft 2-3. The lower end slide rail 2-1 is fixedly connected with the upper surface of the lower flange 5 and is arranged along the radial direction, the lower end slide rail 2-1 is provided with a slide rail groove, and the slide rail groove is obliquely arranged and forms an included angle theta with the plane of the lower flange 5 along the radial direction of the upper flange 1. The roller is arranged in a slide rail groove of the slide rail 2-1 and can freely roll along the slide rail groove, and the roller is connected with the connecting rod I2-4 through a pin shaft 2-3. The upper connecting rod I2-4 and the lower connecting rod I2-5 are fixedly connected with the connecting rod II 2-5, and the connecting rod I2-4 and the connecting rod II 2-5 are in a beta included angle relationship and are of a symmetrical structure. The connecting rod II 2-5 is fixedly connected with the piston 2-6-2, the cross section of the piston 2-6-2 is cylindrical, and a sealing ring groove is formed in the outer surface of the cylinder and used for placing the sealing ring 2-6-6. The piston 2-6-2 and the sealing ring 2-6-6 can slide in the cylinder 2-6-3, and the three form a closed space, namely a balance cavity. The left end of the cylinder body 2-6-3 is provided with a through hole, and the outer side wall of the middle pipe 4 is provided with a through hole. The communicating pipe 2-7 is internally communicated, one end of the communicating pipe is fixedly connected with the through hole of the cylinder body 2-6-3, and the other end of the communicating pipe is fixedly connected with the through hole of the intermediate pipe 4.
The balance principle is as follows: in a 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 a medium with pressure p, and meanwhile, the medium enters a cavity formed by the cylinder body 2-6-3, the sealing ring 2-6-6 and the piston 2-6-2 from a through hole in the side wall of the middle pipe 4 through the communicating pipe 2-7 and the through hole in the cylinder body 2-6-3. As shown in fig. 1. In order to realize pressure thrust balance, a pressure balance type bellows expansion joint structure must satisfy the following relational expression:
in the formula
A is the cross section area of the piston 2-6-2;
Acthe total effective area Ac of the bellows (see GB/T12777-;
n-number of balancing members 2;
beta is the included angle between the connecting rod II 2-5 and the connecting rod I2-4;
theta is the included angle between the slide rail groove 2-1-1 and the surface of the upper flange 1.
The pressure thrust acts on the upper flange 1 and the lower flange 5, the upper flange 1 and the lower flange 5 simultaneously receive the acting force of the balance component 2, and the resultant force of the acting force is equal to the pressure thrust in the same direction and opposite to the pressure thrust, so that the pressure thrust balance is realized. The expansion joint is always in a pressure and thrust balanced state no matter in the original position or any axial deformation position.
The displacement compensation mode is as follows:
(1) axial compressive displacement occurs: the pipe system is displaced, the upper flange 1 and the lower flange 5 are compressed to move towards the middle of the expansion joint, in order to meet the deformation coordination condition, the upper flange 1 and the lower flange 5 push a roller (a rolling bearing) to roll outwards along the radial direction of a slide rail groove of the slide rail 2-1, and a force transmission connecting rod formed by a connecting rod I2-4 and a connecting rod II 2-5 pulls a piston 2-6-2 to move outwards along the radial direction. The pipe system and a cavity formed by the cylinder body 2-6-3, the sealing ring 2-6-6 and the piston 2-6-2 are filled with a medium with pressure p. According to the balance principle, the pressure balance state is always kept during the moving process and when the displacement position is reached. As shown in fig. 2.
(2) Axial tensile displacement occurs: the pipe system is displaced, the upper flange 1 and the lower flange 5 are stretched to move towards the outside of the expansion joint, under the condition of deformation coordination, the upper flange 1 and the lower flange 5 push a roller (a rolling bearing) to roll along a slide rail groove of the slide rail 2-1 to the center along the radial direction, and a force transmission connecting rod formed by a connecting rod I2-4 and a connecting rod II 2-5 pulls a piston 2-6-2 to move towards the center along the radial direction. The pipe system and a cavity formed by the cylinder body 2-6-3, the sealing ring 2-6-6 and the piston 2-6-2 are filled with a medium with pressure p. According to the balance principle, the pressure balance state is always kept during the moving process and when the displacement position is reached. As shown in fig. 3.
Example 2
As shown in fig. 4, the principle and structure are substantially the same as those of embodiment 1, except that: the upper flange 1 is replaced by a first end pipe 6, the lower flange is replaced by a second end pipe 7, and the replaced first end pipe and the replaced second end pipe also play a role in connection with a pipe system and are not changed essentially.
Example 3
A pressure balanced bellows expansion joint comprising: upper flange 1, balancing component 2, bellows 3, intermediate pipe 4, lower flange 5. Wherein the balance member 2 comprises: the device comprises a sliding rail 2-1, a roller (or a rolling bearing), a pin shaft 2-3, a connecting rod I2-4, a connecting rod II 2-5, a sealing plate I2-6-4, a balance corrugated pipe 2-6-1, a sealing plate II 2-6-5 and a communicating pipe 2-7.
The corrugated pipe assembly is connected with the upper flange 1 and the lower flange 5 in a welding mode, an even number of corrugated pipes 3 and the middle pipe 4 of the corrugated pipe assembly are welded in series to form an axial expansion joint main body, two ends of the balance components 2 are respectively connected with the upper flange 1 and the lower flange 5 through sliding rails 2-1, and the communicating pipes 2-7 are connected with the middle pipe 4. The balance members 2 are circumferentially and uniformly distributed outside the corrugated pipe assembly.
The balance member 2 is composed of and connected with: the balance component 2 is in a symmetrical structure along the second connecting rod 2-5. The upper end slide rail 2-1 is fixedly connected with the lower surface of the upper flange 1 and arranged along the radial direction, the upper end slide rail 2-1 is provided with a slide rail groove, and the slide rail groove is obliquely arranged and arranged along the radial direction of the upper flange 1 and forms an included angle theta with the plane of the upper flange. The roller (rolling bearing) is arranged in a slide rail groove of the slide rail 2-1 and can freely roll along the slide rail groove, and the roller is connected with the connecting rod I2-4 through a pin shaft 2-3. The lower end slide rail 2-1 is fixedly connected with the upper surface of the lower flange 5 and is arranged along the radial direction, the lower end slide rail 2-1 is provided with a slide rail groove, and the slide rail groove is obliquely arranged and forms an included angle theta with the plane of the lower flange 5 along the radial direction of the upper flange 1. The roller is arranged in a slide rail groove of the slide rail 2-1 and can freely roll along the slide rail groove, and the roller is connected with the connecting rod I2-4 through a pin shaft 2-3. The upper connecting rod I2-4 and the lower connecting rod I2-5 are fixedly connected with the connecting rod II 2-5, and the connecting rod I2-4 and the connecting rod II 2-5 are in a beta included angle relationship and are of a symmetrical structure. The connecting rod II 2-5 is fixedly connected with the sealing plate I2-6-4, the sealing plate I2-6-4 is of a solid structure, the outer side of the sealing plate I is connected with the balance corrugated pipe 2-6-1, and the middle of the sealing plate I is fixedly connected with the connecting rod II 2-5. The other end of the balance corrugated pipe 2-6-1 is connected with the outer side of a sealing plate 2-6-5. The center of the second sealing plate 2-6-5 is provided with a through hole which is connected with the communicating pipe 2-7, the center of the communicating pipe 2-7 is communicated, the other end of the communicating pipe 2-7 is connected with the through hole arranged on the side wall of the middle pipe 4 to form a medium circulation passage, a medium can enter the inner cavity of the balance corrugated pipe 2-6-1 through the through hole on the side wall of the middle pipe 4, the communicating pipe 2-7 and the through hole of the second sealing plate 2-6-5, and the inner cavity of the balance corrugated pipe 2-6-1 is a.
The balance principle is as follows: under the working state, flanges at two ends of the expansion joint are connected with a pipe system, and the inside of the expansion joint and the inner cavity of the balance corrugated pipe 2-6-1 are filled with a medium with pressure p. As shown in fig. 5. In order to realize pressure thrust balance, a pressure balance structure of a corrugated pipe expansion joint needs to satisfy the following relation:
in the formula
Acp-the effective area of the balance bellows 2-6-1 (see the GB/T12777-;
Acgthe effective total area of the corrugated pipe (see GB/T12777-;
n-number of balancing members 2;
beta is the included angle between the connecting rod II 2-5 and the connecting rod I2-4;
theta is the included angle between the slide rail groove 2-1-1 and the surface of the upper flange 1.
The pressure thrust acts on the upper flange 1 and the lower flange 5, the upper flange 1 and the lower flange 5 simultaneously receive the acting force of the balance component 2, and the resultant force of the acting force is equal to the pressure thrust in the same direction and opposite to the pressure thrust, so that the pressure thrust balance is realized. The expansion joint is always in a pressure and thrust balanced state no matter in the original position or any axial deformation position.
The displacement compensation mode is as follows:
(1) axial compressive displacement occurs: the pipe system is displaced, the upper flange 1 and the lower flange 5 are compressed to move towards the middle of the expansion joint, in order to meet the deformation coordination condition, the upper flange 1 and the lower flange 5 push a roller (a rolling bearing) to roll outwards along the radial direction of a slide rail groove of the slide rail 2-1, a force transmission connecting rod formed by a connecting rod I2-4 and a connecting rod II 2-5 pulls the sealing plate I2-6-4 to move outwards along the radial direction, and the balance corrugated pipe 2-6-1 is stretched and deformed. According to the balance principle, the pressure balance state is always kept during the moving process and when the displacement position is reached. As shown in fig. 6.
(2) Axial tensile displacement occurs: the pipe system is displaced, the upper flange 1 and the lower flange 5 are stretched to move towards the outside of the expansion joint, under the condition of deformation coordination, the upper flange 1 and the lower flange 5 push a roller (a rolling bearing) to roll along a slide rail groove of the slide rail 2-1 to the center along the radial direction, a force transmission connecting rod formed by a connecting rod I2-4 and a connecting rod II 2-5 pulls the sealing plate I2-6-4 to move towards the center along the radial direction, and the balance corrugated pipe 2-6-1 is compressed and deformed. According to the balance principle, the pressure balance state is always kept during the moving process and when the displacement position is reached. As shown in fig. 7.
Example 4
As shown in fig. 8, the principle and structure are substantially the same as those of embodiment 3, except that: the upper flange 1 is replaced by a first end pipe 6, the lower flange is replaced by a second end pipe 7, and the replaced first end pipe and the replaced second end pipe also play a role in connection with a pipe system and are not changed essentially.
Claims (4)
1. The utility model provides a pressure balance type bellows expansion joint which characterized in that: comprises an axial expansion joint main body and n groups of balance members (2) which are uniformly distributed on the outer side of the expansion joint main body;
the axial expansion joint main body comprises an upper flange (1), a lower flange (5) and a corrugated pipe assembly, wherein two ends of the corrugated pipe assembly are respectively connected with the upper flange (1) and the lower flange (5), and the corrugated pipe assembly is formed by connecting an even number of sections of corrugated pipes (3) in series with an intermediate pipe (4) connected with the adjacent corrugated pipes (3);
the balance member (2) comprises a pressure-bearing pushing assembly and two sliding assemblies, the pressure-bearing pushing assembly is arranged corresponding to the center of the axial expansion joint main body and comprises a balance body (2-6) with a balance cavity, a communicating pipe (2-7) and a connecting rod II (2-5), one end of the balance cavity of the balance body (2-6) is communicated with the inner cavity of the axial expansion joint main body through the communicating pipe (2-7), the other end of the balance body (2-6) is connected with the connecting rod II (2-5), the balance body (2-6) stretches and retracts according to the pressure of the inner cavity of the axial expansion joint main body, the size of the balance cavity is changed, and therefore the connecting rod II (2-5) is pushed or pulled back to move along the radial direction of the axial expansion joint main body;
the two sliding assemblies are symmetrically arranged along the second connecting rod (2-5), each sliding assembly consists of a sliding rail (2-1) arranged on the upper flange (1) or the lower flange (5), a first connecting rod (2-4) and a rolling body (2-2), a sliding rail groove (2-1-1) is formed in the sliding rail (2-1), the sliding rail groove (2-1-1) is arranged along the radial direction of the upper flange (1) or the lower flange (5) and is obliquely arranged, the sliding rail groove (2-1-1) and the plane of the upper flange (1) or the lower flange (5) form an included angle theta, the rolling body (2-2) is rotatably connected to one end of the first connecting rod (2-4) and matched with the sliding rail groove (2-1-1) to be arranged in the sliding rail groove (2-1-1) in a rolling manner, the other end of the first connecting rod (2-4) is connected with the second connecting rod (2-5), and the two first connecting rods (2-4) and the second connecting rods (2-5) form an included angle of beta;
the axial expansion joint body and the balance member (2) satisfy the following relation:
in the formula:
Acp-balancing the effective area of the body;
Acg-the effective area of the bellows assembly.
2. A pressure balanced bellows expansion joint as claimed in claim 1, wherein: the balance body (2-6) is a balance corrugated pipe (2-6-1), two ends of the balance corrugated pipe (2-6-1) are hermetically connected with a sealing plate I (2-6-4) and a sealing plate II (2-6-5), the communicating pipe (2-7) penetrates through the sealing plate II (2-6-5) and then is communicated with a balance cavity of the balance corrugated pipe (2-6-1), and the sealing plate I (2-6-4) is connected with a connecting rod II (2-5).
3. A pressure balanced bellows expansion joint as claimed in claim 1, wherein: the balance body (2-6) consists of a cylinder body (2-6-3) and a piston (2-6-2), one end of the piston (2-6-2) is connected with the second connecting rod (2-5), and a balance cavity is enclosed between the other end of the piston (2-6-2) and the inner wall of the cylinder body (2-6-3).
4. A pressure balanced bellows expansion joint as claimed in claim 1, wherein: the rolling bodies (2-2) are rolling wheels or rolling bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020478073.2U CN212430073U (en) | 2020-04-03 | 2020-04-03 | Pressure balance type bellows expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020478073.2U CN212430073U (en) | 2020-04-03 | 2020-04-03 | Pressure balance type bellows expansion joint |
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| Publication Number | Publication Date |
|---|---|
| CN212430073U true CN212430073U (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020478073.2U Withdrawn - After Issue CN212430073U (en) | 2020-04-03 | 2020-04-03 | Pressure balance type bellows expansion joint |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503390A (en) * | 2020-04-03 | 2020-08-07 | 洛阳双瑞特种装备有限公司 | Pressure balance type bellows expansion joint |
| CN118149200A (en) * | 2024-05-09 | 2024-06-07 | 四川省工业设备安装集团有限公司 | Pressure balance type compensator for oversized straight pipe |
-
2020
- 2020-04-03 CN CN202020478073.2U patent/CN212430073U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503390A (en) * | 2020-04-03 | 2020-08-07 | 洛阳双瑞特种装备有限公司 | Pressure balance type bellows expansion joint |
| CN111503390B (en) * | 2020-04-03 | 2024-04-19 | 中船双瑞(洛阳)特种装备股份有限公司 | Pressure balance type bellows expansion joint |
| CN118149200A (en) * | 2024-05-09 | 2024-06-07 | 四川省工业设备安装集团有限公司 | Pressure balance type compensator for oversized straight pipe |
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Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |
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Granted publication date: 20210129 Effective date of abandoning: 20240419 |
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Granted publication date: 20210129 Effective date of abandoning: 20240419 |