Telescopic joint with multidirectional displacement compensation function

Abstract

This invention provides an expansion joint with multi-directional displacement compensation function, comprising a hinge assembly, a sealing assembly, and a saddle assembly. The hinge assembly includes a secondary hinge plate assembly and a main hinge plate assembly. Secondary hinge plate assemblies are located at both ends of the hinge assembly. The outer side of the secondary hinge plate assembly is connected to the outer wall of the pipeline assembly via a vertical block. The secondary hinge plate assembly is connected to both ends of the main hinge plate assembly via pins. Both ends of the main hinge plate assembly have elongated holes through which the pins pass, allowing the main hinge plate assembly to move around the pins. The main hinge plate assembly is connected to the outer wall of the pipeline assembly via the saddle assembly. The left and right ends of the pipeline assembly are connected to pressure steel pipes. The sealing assembly is located on the inner and / or outer side walls of the pipeline assembly. This expansion joint with multi-directional displacement compensation function can achieve multi-directional displacement compensation, improve the seismic performance of the pipeline system, enhance the sealing reliability of the expansion joint, and ensure the safe and reliable operation of the pressure steel pipe system.

Description

Technical Field

[0001] This invention relates to the field of expansion joint technology used in the water conservancy and hydropower industry, and more specifically, to an expansion joint with multi-directional displacement compensation function. Background Technology

[0002] In the water conservancy and hydropower industry, pressure steel pipes are often equipped with expansion joints to compensate for displacements caused by temperature changes or uneven foundation settlement, thereby reducing stress on the pressure steel pipes. The expansion joints used vary depending on the working conditions. For exposed pipelines, primarily axial displacement needs to be compensated, with minimal radial displacement. However, when pressure steel pipes cross seismic fault zones, expansion joints are required to compensate for large displacements in multiple directions, including significant axial, radial, and angular displacements. Due to the special nature of water conservancy and hydropower projects, maintenance or replacement of expansion joints is extremely difficult once installed. Therefore, the sealing performance requirements for expansion joints are very stringent. Traditional sleeve-type expansion joints are prone to leakage due to insufficient installation precision of the inner and outer sleeves, improper installation of the water seal packing, or aging, thus affecting the service life of the expansion joint. Furthermore, while traditional expansion joints can compensate for large radial displacements through the use of two sets of bellows, they are insufficient to simultaneously compensate for large axial and angular displacements. Moreover, due to their low stiffness, expansion joints, when placed on pressure pipelines crossing seismic fault zones, also affect the seismic performance of the pipeline. Therefore, developing expansion joints with multi-directional displacement compensation functions is of great significance for use in special working conditions in the water conservancy and hydropower industry.

[0003] Patent CN204704536U mentions a secondary sealing bellows expansion joint. Although this expansion joint has better sealing performance than the traditional sleeve-type expansion joint, it cannot prevent mud and sand in the internal medium from entering the inner cavity of the bellows. In addition, the design of a single set of bellows and external structural components cannot compensate for large displacements in multiple directions, and cannot meet the needs of complex seismic conditions. Summary of the Invention

[0004] In view of this, the present invention aims to propose an expansion joint with multi-directional displacement compensation function to solve the common problems of existing expansion joints that are difficult to compensate for large displacements in multiple directions, have poor sealing performance, and poor vibration resistance. The invention aims to achieve both compensation for large displacements in multiple directions and good sealing performance and vibration resistance, thereby improving the applicability and safety of the expansion joint under complex geological conditions and extending its service life.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] This invention relates to an expansion joint with multi-directional displacement compensation function, comprising a hinge assembly, a sealing assembly, and a saddle assembly. The hinge assembly includes a secondary hinge plate assembly and a main hinge plate assembly. Secondary hinge plate assemblies are provided at both ends of the hinge assembly. The outer side of the secondary hinge plate assembly is connected to the outer wall of the pipeline assembly via a vertical block. The secondary hinge plate assembly is connected to both ends of the main hinge plate assembly via pins. Both ends of the main hinge plate assembly are provided with elongated holes. The pins pass through the elongated holes to allow the main hinge plate assembly to move around the pins. The main hinge plate assembly is connected to the outer wall of the pipeline assembly via the saddle assembly. The left and right ends of the pipeline assembly are connected to pressure steel pipes. The sealing assembly is provided on the inner and / or outer side walls of the pipeline assembly.

[0007] Furthermore, the secondary hinge plate assembly includes a first secondary hinge assembly and a second secondary hinge assembly, and the upright block includes a left upright plate and a right upright plate. One end of the left upright plate is connected to the outer side of the left end of the pipe assembly, and the other end of the left upright plate is connected to the left end of the main hinge plate assembly through the first secondary hinge assembly. The right end of the main hinge plate assembly is connected to the right upright plate through the second secondary hinge assembly, and the end of the right upright plate away from the second secondary hinge assembly is connected to the outer side of the right end of the pipe assembly.

[0008] Furthermore, the first hinge assembly includes a first hinge plate and a second hinge plate, which are arranged parallel to each other. The left ends of both the first and second hinge plates are connected to the left upright plate. The left end of the main hinge plate assembly is located between the right ends of the first and second hinge plates. The second hinge assembly includes a third hinge plate and a fourth hinge plate, which are arranged parallel to each other. The right ends of both the third and fourth hinge plates are connected to the right upright plate. The right end of the main hinge plate assembly is located between the left ends of the third and fourth hinge plates.

[0009] Furthermore, the pin is connected from top to bottom to the first secondary hinge plate, the elongated hole at the left end of the main hinge plate assembly, and the second secondary hinge plate, and from top to bottom to the third secondary hinge plate, the elongated hole at the right end of the main hinge plate assembly, and the fourth secondary hinge plate. The diameter d of the semicircles at both ends of the elongated hole is equal to the diameter of the pin, and the distance a between the centers of the semicircles at both ends of the elongated hole is greater than the diameter of the pin.

[0010] Furthermore, the piping assembly includes an end pipe assembly, a corrugated pipe, and an intermediate pipe. The end pipe assembly includes a left end pipe and a right end pipe. The left end of the left end pipe and the right end of the right end pipe are respectively connected to the pressure steel pipe. Corrugated pipes are respectively installed at the right end of the left end pipe and the left end of the right end pipe. An intermediate pipe is installed between the corrugated pipes. The left end pipe is connected to one end of the guide tube. The other end of the guide tube is connected to the intermediate pipe through a sealing assembly. The intermediate pipe is connected to one end of the guide tube. The other end of the guide tube is connected to the right end pipe through a sealing assembly. The outside of the intermediate pipe is connected to the main hinge plate assembly through a saddle assembly. The outside of the left end pipe is connected to the left vertical plate. The outside of the right end pipe is connected to the right vertical plate.

[0011] Furthermore, the piping assembly includes an outer sleeve, one end of which is connected to the end of the end pipe assembly near the bellows, and the other end of which is connected to the outside of the intermediate pipe via a sealing assembly.

[0012] Furthermore, the end pipe assembly is a reducing pipe. The left end pipe includes left end one, left end two, and left end three; the right end pipe includes right end one, right end two, and right end three; the outer casing includes outer casing one and outer casing two; and the corrugated pipe includes corrugated pipe one and corrugated pipe two. One end of left end one is connected to the pressure steel pipe, and the other end of left end one is connected to one end of left end three through left end two. The other end of left end three is connected to corrugated pipe one and outer casing one, respectively. The end of corrugated pipe one furthest from left end three is connected to the left end of the middle pipe. The outer tube is connected to the left end of the middle tube via a sealing assembly at one end of the outer tube away from the left end of the third tube. The left end tube is connected to the guide tube at one end of the left end of the second tube. The right end tube is connected to the pressure steel pipe at one end. The other end of the right end tube is connected to the right end tube via the right end tube and the right end tube. The other end of the right end tube is connected to the corrugated tube and the outer tube at the other end. The corrugated tube is connected to the right end of the middle tube and the guide tube at one end of the right end of the third tube. The outer tube is connected to the right end of the middle tube via a sealing assembly at one end of the outer tube away from the right end of the third tube.

[0013] Furthermore, the sealing assembly includes a sealing part and a retaining ring. The sealing part is used to connect the outer tube and the intermediate tube, and the retaining ring is used to prevent foreign objects from entering the interior of the bellows.

[0014] Furthermore, the sealing part includes a transition ring plate, a connecting pipe, a tie rod assembly, a pressure plate assembly, a support ring plate, a support cylinder section, and a sealing filler. The transition ring plate is connected to the outer sleeve. A first gap is left between the end of the transition ring plate away from the outer sleeve and the upper side of the support cylinder section. The right side of the transition ring plate is welded to the left side of the connecting pipe. The upper side of the connecting pipe is connected to the pressure plate assembly through the tie rod assembly. One lower end of the support cylinder section is connected to the intermediate pipe. The other lower end of the support cylinder section is connected to the intermediate pipe through the support ring plate. A first cavity is formed between the support cylinder section, the transition ring plate, and the connecting pipe. A sealing filler is disposed in the first cavity.

[0015] Furthermore, the guide tube includes a first guide tube and a second guide tube, and the retaining ring includes a first retaining ring and a second retaining ring. One end of the first guide tube is connected to the left end of the second tube, and the other end of the first guide tube is connected to the left end of the middle tube through the first retaining ring. One end of the second guide tube is connected to the corrugated second tube, and the other end of the second guide tube is connected to the right end of the middle tube through the second retaining ring.

[0016] Compared with the prior art, the expansion joint with multi-directional displacement compensation function described in this invention has the following beneficial effects:

[0017] The aforementioned expansion joint with multi-directional displacement compensation function can meet the needs of compensating for large axial, radial, and angular displacements when pressure steel pipes cross earthquake fault zones, while also having a limiting function under extreme displacement conditions. Through the rational design of external structural components, the vibration of the expansion joint is effectively reduced, improving the seismic performance of the system. Furthermore, the optimization of the double-seal structure improves the sealing reliability of the expansion joint, ensuring the long-term safe and reliable operation of the pressure steel pipe system, extending the service life of the expansion joint, increasing its strength, and further enhancing its stability. Attached Figure Description

[0018] The accompanying drawings, which constitute a part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0019] In the picture:

[0020] Figure 1 This is a schematic diagram of a device with multi-directional displacement compensation function;

[0021] Figure 2 This is a magnified view of a portion of point A.

[0022] Figure 3 This is a magnified view of point A (with a T-shaped equalization ring).

[0023] Figure 4 A top view of the main hinge plate assembly.

[0024] Explanation of reference numerals in the attached drawings: 1. End tube assembly; 11. Retaining ring; 111. First retaining ring; 112. Second retaining ring; 2. Flow guide tube; 21. Flow guide tube one; 22. Flow guide tube two; 3. Bellows; 31. Bellows tube one; 32. Bellows tube two; 4. Secondary hinge plate assembly; 41. First secondary hinge assembly; 411. First secondary hinge plate; 412. Second secondary hinge plate; 42. Second secondary hinge assembly; 421. Third secondary hinge plate; 422. Fourth secondary hinge plate; 5. Main hinge plate assembly; 6. Outer sleeve; 61. Outer sleeve tube one; 62. Outer sleeve tube two; 63. Ring plate; 64. Sleeve body; 7. Sealing part; 71. Transition ring plate; 711. First side; 72. Connecting pipe; 73. Tie rod assembly; 74. Pressure plate assembly; 75. Support 76. Ring plate; 77. Support cylinder section; 78. Sealing filler; 79. Balance ring; 80. Intermediate tube; 81. Intermediate tube 1; 82. Intermediate tube 2; 83. Intermediate tube 3; 9. Saddle assembly; 10. Pin shaft; 101. First shaft; 102. Second shaft; 12. Hinge assembly; 13. Sealing assembly; 14. Stand block; 141. Left stand plate; 142. Right stand plate; 15. Pipeline assembly; 16. Left end tube; 161. Left end tube 1; 162. Left end tube 2; 163. Left end tube 3; 17. Right end tube; 171. Right end tube 1; 172. Right end tube 2; 173. Right end tube 3; 18. Oblong hole; 181. First slot; 182. Second slot; 19. First cavity; 20. Second cavity; 23. First gap. Detailed Implementation

[0025] The inventive concepts of this disclosure will be described below using terminology commonly used by those skilled in the art to communicate the essence of their work to others skilled in the art. However, these inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments described herein.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0027] In the description of this specification, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this specification.

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. In the prior art, the inner and outer sleeves of traditional sleeve-type expansion joints are not installed with sufficient precision, or the water seal packing is improperly installed, or leakage occurs to varying degrees as the joint ages, thus affecting the service life of the expansion joint. In addition, existing expansion joints often cannot simultaneously compensate for large axial displacement, radial displacement, and angular displacement. Furthermore, due to their low rigidity, expansion joints can affect the overall seismic resistance of pipelines when used in complex geological conditions such as earthquake fault zones.

[0029] To address the problems of existing technologies, such as the inability to simultaneously compensate for large displacements in multiple directions and poor vibration resistance and sealing, this embodiment proposes a telescopic joint with multi-directional displacement compensation function. The joint includes a hinge assembly 12, a sealing assembly 13, and a saddle assembly 9. The hinge assembly 12 includes a secondary hinge plate assembly 4 and a main hinge plate assembly 5. Secondary hinge plate assemblies 4 are located at both ends of the hinge assembly 12. The outer side of the secondary hinge plate assembly 4 is connected to the outer wall of the pipeline assembly 15 via a vertical block 14. The secondary hinge plate assembly 4 is connected to both ends of the main hinge plate assembly 5 via pins 10. Both ends of the main hinge plate assembly 5 are provided with elongated holes 18. The pins 10 pass through the elongated holes 18, allowing the main hinge plate assembly 5 to move around the pins 10. The main hinge plate assembly 5 is connected to the outer wall of the pipeline assembly 15 via the saddle assembly 9. The left and right ends of the pipeline assembly 15 are connected to pressure steel pipes. The sealing assembly 13 is located on the inner and / or outer side walls of the pipeline assembly 15 for sealing. In this embodiment, "up," "down," "left," and "right" refer to... Figure 1 The direction indicated.

[0030] The aforementioned expansion joint structure can effectively reduce the vibration of the expansion joint's intermediate pipe 8, thereby effectively improving the expansion joint's vibration resistance. The sealing structure can effectively enhance the sealing reliability of the expansion joint and extend its service life.

[0031] A secondary hinge plate assembly 4 is provided at both ends of the hinge assembly 12, and a main hinge plate assembly 5 is provided between the two secondary hinge plate assemblies 4. The secondary hinge plate assemblies 4 are welded to the pipe assembly 15 through the upright block 14. The secondary hinge plate assembly 4 includes a first secondary hinge assembly 41 and a second secondary hinge assembly 42. The upright block 14 includes a left upright plate 141 and a right upright plate 142. One end of the left upright plate 141 is connected to the outer left side of the pipe assembly 15, and the other end of the left upright plate 141 is connected to the left end of the main hinge plate assembly 5 through the first secondary hinge assembly 41. The right end of the main hinge plate assembly 5 is connected to the right upright plate 142 through the second secondary hinge assembly 42. The end of the right upright plate 142 away from the second secondary hinge assembly 42 is connected to the pipe assembly 15. The right side of the road component 15 is connected; specifically, the first secondary hinge assembly 41 includes a first secondary hinge plate 411 and a second secondary hinge plate 412. The first secondary hinge plate 411 and the second secondary hinge plate 412 are arranged parallel to each other. The first secondary hinge plate 411 is above the second secondary hinge plate 412. The left ends of the first secondary hinge plate 411 and the left ends of the second secondary hinge plate 412 are both connected to the left upright plate 141. The left end of the main hinge plate assembly 5 is located between the right ends of the first secondary hinge plate 411 and the right ends of the second secondary hinge plate 412. The second secondary hinge assembly 42 includes a third secondary hinge plate 421 and a fourth secondary hinge plate 422. The third secondary hinge plate 421 and the fourth secondary hinge plate 422 are arranged parallel to each other. The third secondary hinge plate 421 is located above the fourth secondary hinge plate 422. Above, the right ends of the third secondary hinge plate 421 and the fourth secondary hinge plate 422 are both connected to the right vertical plate 142. The right end of the main hinge plate assembly 5 is located between the left ends of the third secondary hinge plate 421 and the left ends of the fourth secondary hinge plate 422. The pin 10 connects from top to bottom to the first secondary hinge plate 411, the elongated hole 18 at the left end of the main hinge plate assembly 5, and the second secondary hinge plate 412. The pin 10 also connects from top to bottom to the third secondary hinge plate 421, the elongated hole 18 at the right end of the main hinge plate assembly 5, and the fourth secondary hinge plate 422. At least one elongated hole 18 is provided. The diameter d of the semicircles at both ends of the elongated hole 18 is equal to the diameter of the pin 10. The center-to-center distance a of the semicircles at both ends of the elongated hole 18 is greater than the diameter a of the pin 10. The diameter of 0; the pin 10 includes a first shaft 101 and a second shaft 102, and the oblong hole 18 includes a first slot 181 and a second slot 182. The first shaft 101 is connected from top to bottom to the first secondary hinge plate 411, the first slot 181 and the second secondary hinge plate 412. The second shaft 102 is connected from top to bottom to the third secondary hinge plate 421, the second slot 182 and the fourth secondary hinge plate 422. The oblong hole 18 is used to realize the simultaneous large compensation of axial displacement, radial displacement and angular displacement of the expansion joint. In this embodiment, "oblong hole 18" refers to the shape shown in GBT12620-2008, which is not a perfect circle, but a shape with semicircles at both ends and a rectangle in the middle (e.g., Figure 4 As shown, there is no other implied meaning.

[0032] The hinge assembly 12 effectively ensures the stability of the expansion joint. The secondary hinge plate assemblies 4 on both sides are equipped with pins 10, which tightly fix the main hinge plate assembly 5 together, reducing the use of other connecting components. It can also compensate for large radial displacements, and is easy to disassemble, improving the stability of the expansion joint, enhancing the stability of the expansion joint structure, making the expansion joint more reliable, and thus extending the service life of the expansion joint. Two sets of secondary hinge plate assemblies 4 are symmetrically arranged on the left and right sides with the saddle assembly 9 as the center. The main hinge plate assembly 5 has elongated holes 18 at both ends. The joint arrangement of the two elongated holes 18 and the pin 10 allows the expansion joint to achieve large axial displacement during operation, and also achieve large angular and radial displacement through the rotation of the pin 10. When the pin 10 reaches one end of the elongated hole 18, its displacement will not continue to increase. At this time, the overall rigidity of the secondary hinge plate assemblies 4, the upright block 14 and the pipeline assembly 15 at both ends limits the ultimate axial displacement of the pin 10, thus playing the role of preventing pull-out and compression under extreme working conditions.

[0033] Pipeline assembly 15 includes end pipe assembly 1, corrugated pipe 3, and intermediate pipe 8. End pipe assembly 1 includes left end pipe 16 and right end pipe 17. The corrugated pipe 3 adopts a reinforced U-shape to withstand internal pressure and prevent mud and sand, serving as the first layer of sealing. The left end of the left end pipe 16 and the right end of the right end pipe 17 are respectively connected to the pressure steel pipe. The right end of the left end pipe 16 and the left end of the right end pipe 17 are respectively provided with corrugated pipe 3. The intermediate pipe 8 is arranged between the corrugated pipes 3. The left end pipe 16 is connected to one end of the guide tube 2, and the other end of the guide tube 2 is sealed. Component 13 is connected to the intermediate pipe 8, and the intermediate pipe 8 is connected to one end of the guide tube 2. The other end of the guide tube 2 is connected to the right end pipe 17 through the sealing component 13. The outside of the intermediate pipe 8 is connected to the main hinge plate component 5 through the saddle component 9. The outside of the left end pipe 16 is connected to the left vertical plate 141, and the outside of the right end pipe 17 is connected to the right vertical plate 142. The pipe assembly 15 includes an outer sleeve 6. One end of the outer sleeve 6 is connected to the end of the end pipe assembly 1 near the bellows 3, and the other end of the outer sleeve 6 is connected to the intermediate pipe 8 through the sealing component 13. The outer casing 6 is located outside the bellows 3. The outer casing 6 includes an annular plate 63 and a sleeve body 64. One side of the annular plate 63 is welded to the end of the end pipe assembly 1 near the bellows 3, and the other side of the annular plate 63 is connected to the sleeve body 64. The other side of the sleeve body 64 is connected to the outside of the intermediate pipe 8 through the sealing assembly 13. A balancing ring 78 is provided between two adjacent corrugations of the bellows 3. The upper end of the balancing ring 78 includes T-shapes, square shapes, etc., which are used to improve the pressure bearing capacity of the troughs and sidewalls of the bellows 3. At the same time, the T-shaped balancing ring 78 can also make the compression displacement between the corrugations of the bellows 3 uniform. In this embodiment, the main hinge plate assembly 5 is connected to the outer side of the middle part of the intermediate pipe 8 through the saddle assembly 9. However, the connection between the intermediate pipe 8 and the main hinge plate assembly 5 can also be achieved by other support members, not limited to the saddle assembly 9 mentioned in this embodiment. Here, "trough" refers to the lowest end of the connection between two adjacent corrugations of the bellows 3, and "sidewall" refers to the sidewall of the bellows 3 near the two sides of the trough.

[0034] The main hinge plate assembly 5 is connected to the outer side of the middle section of the intermediate pipe 8 via the saddle assembly 9. The weight of the intermediate pipe 8 can be effectively transferred to the secondary hinge plate assemblies 4 connected to both ends of the main hinge plate assembly 5, thereby effectively enhancing the stability of the intermediate pipe 8, enhancing the vibration resistance of the expansion joint, and thus improving the vibration resistance of the entire piping system, enhancing the stability and reliability of the expansion joint, further extending the service life of the expansion joint, and improving the safety of the expansion joint. The arrangement of the corrugated pipe 1 31 and corrugated pipe 2 32 with the intermediate pipe 8, and the use of the corrugated pipe 3 as an expansion joint, can effectively compensate for the axial and radial displacement of the pipeline or equipment caused by temperature difference or temperature fluctuation, and can also enhance the vibration resistance of the expansion joint.

[0035] End pipe assembly 1 is a reducing pipe. Left end pipe 16 includes left end first pipe 161, left end second pipe 162, and left end third pipe 163. Right end pipe 17 includes right end first pipe 171, right end second pipe 172, and right end third pipe 173. Outer pipe 6 includes outer outer first pipe 61 and outer outer second pipe 62. Corrugated pipe 3 includes corrugated first pipe 31 and corrugated second pipe 32. One end of left end first pipe 161 is connected to a pressure steel pipe, and the other end of left end first pipe 161 is connected to one end of left end third pipe 163 via left end second pipe 162. Left end third pipe 16... 3. The other end is connected to the corrugated pipe 31 and the outer sleeve pipe 61 respectively. The end of the corrugated pipe 31 away from the left end three pipe 163 is connected to the left end of the middle pipe 8. The end of the outer sleeve pipe 61 away from the left end three pipe 163 is connected to the left end of the middle pipe 8 through the sealing component 13. The end of the left end one pipe 161 near the left end two pipe 162 is connected to the guide tube 2. One end of the right end one pipe 171 is connected to the pressure steel pipe. The other end of the right end one pipe 171 is connected to the right end three pipe 173 through the right end two pipe 172. The other end of the right end three pipe 173... The two ends are respectively connected to the corrugated second pipe 32 and the outer second pipe 62. The end of the corrugated second pipe 32 away from the right end third pipe 173 is connected to the right end of the middle pipe 8 and the guide tube 2. The end of the outer second pipe 62 away from the right end third pipe 173 is connected to the right end of the middle pipe 8 through the sealing assembly 13. The diameter of the left end first pipe 161 is smaller than the diameter of the left end third pipe 163, and the diameter of the right end first pipe 171 is smaller than the diameter of the right end third pipe 173. The left and right ends of the middle pipe 8 are variable diameter pipe structures, so that from left to right, the diameter of the left end of the middle pipe 8 is... The diameter of the tube changes from large to small. The right end of the middle tube 8 changes from small to large. The middle tube 8 includes a middle tube 1 81, a middle tube 2 82, and a middle tube 3 83. The end of the middle tube 1 81 away from the middle tube 2 82 is connected to the right root of the corrugated tube 1 31. The middle tube 1 81, the middle tube 2 82, and the middle tube 3 83 are connected in sequence. The end of the middle tube 3 83 away from the middle tube 2 82 is connected to the left root of the corrugated tube 2 32. The middle tube 1 81, the middle tube 2 82, and the middle tube 3 83 are integrally formed structures.

[0036] By using the variable diameter tube of the end pipe assembly 1, the inner diameter of the guide tube 2 can be made flush with the inner diameter of the end pipe assembly 1, thereby reducing the flow resistance of the expansion joint, reducing the impact force of the fluid on the expansion joint, improving the service life of the expansion joint, enhancing the safety and practicality of the expansion joint, and thus ensuring the application range and reliability of the expansion joint.

[0037] The sealing assembly 13 includes a sealing part 7 and a retaining ring 11. The sealing part 7 is used to connect the outer tube 6 and the intermediate tube 8, and the retaining ring 11 is used to prevent foreign objects from entering the interior of the bellows 3. The sealing part 7 includes a transition ring plate 71, a connecting pipe 72, a tie rod assembly 73, a pressure plate assembly 74, a support ring plate 75, a support cylinder section 76, and a sealing filler 77. The transition ring plate 71 is connected to the sleeve body 64 of the outer sleeve 6. A first gap 23 is left between the end of the transition ring plate 71 away from the sleeve body 64 of the outer sleeve 6 and the upper side of the support cylinder section 76 on the upper side of the intermediate pipe 8. The first gap 23 is used to cooperate with other components of the sealing part 7 to achieve secondary sealing. The right side of the transition ring plate 71 is welded to the left side of the connecting pipe 72. The upper side of the connecting pipe 72 is connected to the pressure plate assembly 74 through the tie rod assembly 73. One lower end of the support cylinder section 76 is connected to the intermediate pipe 8, and the other lower end of the support cylinder section 76 is connected to the intermediate pipe 8 through the support ring plate 75. Specifically, the transition ring plate 71 includes a first side surface 711, which is welded to the left side of the connecting pipe 72. The upper side of the connecting pipe 72 is welded to one end of the tie rod assembly 73. 3. The other end is welded to the upper side of the pressure plate assembly 74. The lower side of the pressure plate assembly 74 is left with a gap from the upper side of the support cylinder section 76. One end of the lower side of the support cylinder section 76 is connected to the middle first pipe 81 and / or the middle third pipe 83. The other end of the support cylinder section 76 is fixedly connected to the middle second pipe 82 through the support ring plate 75. A first cavity 19 is formed between the support cylinder section 76, the transition ring plate 71 and the connecting pipe 72. A second cavity 20 is formed between the corrugated pipe 3, the outer sleeve 6 and the transition ring plate 71. The first cavity 19 and the second cavity 20 are connected through the first gap 23. A sealing filler 77 is provided in the first cavity 19 to achieve the second layer of sealing. At least one sealing filler 77 is provided. The sealing filler 77 includes ordinary packing, water-reactive rubber, etc. The sealing filler 77 also includes ordinary packing and water-reactive rubber interspersed. The tie rod assembly 73 and the pressure plate assembly 74 can play the role of pressing and fixing the sealing filler 77.

[0038] The sealing part 7 effectively ensures that even if the bellows 3 inside the outer sleeve 6 leaks, it can still be effectively sealed. Secondly, the first cavity 19 significantly reduces the cavity volume compared to the prior art, thereby reducing the amount of sealing filler 77 used and lowering the cost of the expansion joint. At the same time, the support cylinder 76 allows for the spaced arrangement of multiple sealing materials. Furthermore, the cooperation between the tie rod assembly 73 and the pressure plate assembly 74 further enhances the fixing force and strength of the sealing filler 77, further improving the sealing performance of the expansion joint and thus greatly improving its reliability.

[0039] The guide tube 2 includes a first guide tube 21 and a second guide tube 22. The baffle ring 11 includes a first baffle ring 111 and a second baffle ring 112. One end of the first guide tube 21 is connected to the left end of the second tube 162, and the other end of the first guide tube 21 is connected to the middle tube 81 at the left end of the middle tube 8 through the first baffle ring 111. One end of the second guide tube 22 is connected to the corrugated second tube 32, and the other end of the second guide tube 22 is connected to the middle third tube 83 at the right end of the middle tube 8 through the second baffle ring 112.

[0040] The retaining ring 11 effectively prevents river water sediment from entering the bellows 3, thereby extending the service life of the bellows 3. It also effectively seals the connection between the guide tube 2 and the bellows 3 inside the expansion joint, preventing foreign objects from entering the bellows 3 and effectively reducing the risk of damage to the bellows 3. At the same time, it improves the stability and safety of the expansion joint. The multi-layer sealing structure ensures the reliability of the expansion joint's seal, enabling the pressure steel pipe to operate safely and reliably for a long period of time.

[0041] In this invention, any expansion joint can include the expansion joint structure with multi-directional displacement compensation function described in this embodiment. Based on the relevant structure and assembly relationship of the hinge plate assembly, saddle assembly 9 and sleeve provided in this embodiment, the expansion joint with multi-directional displacement compensation function also includes conventional components such as pin shaft 10, pipeline and hinge, etc. Since they are all prior art, they will not be described in detail here.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A telescopic joint having multi-direction displacement compensation function, characterized in that, The hinge assembly (12) includes a secondary hinge plate assembly (4) and a primary hinge plate assembly (5), the secondary hinge plate assembly (4) is arranged at the left and right ends of the hinge assembly (12), the outer side of the secondary hinge plate assembly (4) is connected with the outer wall of the pipeline assembly (15) through a vertical block (14), the secondary hinge plate assembly (4) is connected with the two ends of the primary hinge plate assembly (5) through a pin shaft (10), the two ends of the primary hinge plate assembly (5) are provided with long circular holes (18), the pin shaft (10) is arranged through the long circular holes (18) so that the primary hinge plate assembly (5) can move around the pin shaft (10), the primary hinge plate assembly (5) is connected with the outer wall of the pipeline assembly (15) through the saddle assembly (9), the left and right ends of the pipeline assembly (15) are connected with the pressure steel pipe, the sealing assembly (13) is arranged on the inner side wall and / or the outer side wall of the pipeline assembly (15); The pipeline assembly (15) includes an end pipe assembly (1), a corrugated pipe (3) and an intermediate pipe (8), the end pipe assembly (1) is a variable diameter pipe; the pipeline assembly (15) includes an outer sleeve pipe (6), one end of the outer sleeve pipe (6) is connected with the end pipe assembly (1) close to one end of the corrugated pipe (3), the other end of the outer sleeve pipe (6) is connected with the outer side of the intermediate pipe (8) through the sealing assembly (13); The sealing assembly (13) includes a sealing part (7), the sealing part (7) includes a transition ring plate (71), a connecting pipe (72), a pull rod assembly (73), a pressing plate assembly (74), a supporting ring plate (75), a supporting cylinder section (76) and a sealing filler (77), the transition ring plate (71) is connected with the outer sleeve pipe (6), a first gap (23) is left between the end of the transition ring plate (71) away from the outer sleeve pipe (6) and the upper side of the supporting cylinder section (76), the right side of the transition ring plate (71) is welded with the left side of the connecting pipe (72), the upper side of the connecting pipe (72) is connected with the pressing plate assembly (74) through the pull rod assembly (73), one end of the lower side of the supporting cylinder section (76) is connected with the intermediate pipe (8), the other end of the lower side of the supporting cylinder section (76) is connected with the intermediate pipe (8) through the supporting ring plate (75), a first cavity (19) is formed between the supporting cylinder section (76), the transition ring plate (71) and the connecting pipe (72), and the sealing filler (77) is arranged in the first cavity (19).

2. The telescopic joint with multi-direction displacement compensation function according to claim 1, characterized in that, The secondary hinge plate assembly (4) includes a first secondary hinge assembly (41) and a second secondary hinge assembly (42), the vertical block (14) includes a left vertical plate (141) and a right vertical plate (142), one end of the left vertical plate (141) is connected with the outer side of the left end of the pipeline assembly (15), the other end of the left vertical plate (141) is connected with the left end of the primary hinge plate assembly (5) through the first secondary hinge assembly (41), the right end of the primary hinge plate assembly (5) is connected with the right vertical plate (142) through the second secondary hinge assembly (42), and the end of the right vertical plate (142) away from the second secondary hinge assembly (42) is connected with the outer side of the right end of the pipeline assembly (15).

3. The telescopic joint with multi-direction displacement compensation function according to claim 2, characterized in that, The first sub-hinge assembly (41) comprises a first sub-hinge plate (411) and a second sub-hinge plate (412), the first sub-hinge plate (411) and the second sub-hinge plate (412) are arranged in parallel, the left end of the first sub-hinge plate (411) and the left end of the second sub-hinge plate (412) are connected with the left vertical plate (141), the right end of the first sub-hinge plate (411) and the right end of the second sub-hinge plate (412) are arranged with the left end of the main hinge plate assembly (5), the second sub-hinge assembly (42) comprises a third sub-hinge plate (421) and a fourth sub-hinge plate (422), the third sub-hinge plate (421) and the fourth sub-hinge plate (422) are arranged in parallel, the right end of the third sub-hinge plate (421) and the right end of the fourth sub-hinge plate (422) are connected with the right vertical plate (142), and the left end of the third sub-hinge plate (421) and the left end of the fourth sub-hinge plate (422) are arranged with the right end of the main hinge plate assembly (5).

4. The telescopic joint with multi-direction displacement compensation function according to claim 3, characterized in that, The pin shaft (10) is sequentially connected with the first sub-hinge plate (411), the long circular hole (18) of the left end of the main hinge plate assembly (5) and the second sub-hinge plate (412) from top to bottom, and the pin shaft (10) is sequentially connected with the third sub-hinge plate (421), the long circular hole (18) of the right end of the main hinge plate assembly (5) and the fourth sub-hinge plate (422) from top to bottom, wherein the diameters d of the semicircles at both ends of the long circular hole (18) are equal to the diameter of the pin shaft (10), and the center distance a between the centers of the semicircles at both ends of the long circular hole (18) is greater than the diameter of the pin shaft (10).

5. The telescopic joint with multi-direction displacement compensation function according to claim 1, characterized in that, The end pipe assembly (1) comprises a left end pipe (16) and a right end pipe (17), the left end of the left end pipe (16) and the right end of the right end pipe (17) are connected with the pressure steel pipe respectively, the right end of the left end pipe (16) and the left end of the right end pipe (17) are provided with corrugated pipes (3) respectively, the corrugated pipes (3) are provided with an intermediate pipe (8) therebetween, the left end pipe (16) is connected with one end of a flow guide cylinder (2), the other end of the flow guide cylinder (2) is connected with the intermediate pipe (8) through a sealing assembly (13), one end of the intermediate pipe (8) is connected with the flow guide cylinder (2), the other end of the flow guide cylinder (2) is connected with the right end pipe (17) through the sealing assembly (13), the outer side of the intermediate pipe (8) is connected with the main hinge plate assembly (5) through a saddle assembly (9), the outer side of the left end pipe (16) is connected with the left vertical plate (141), and the outer side of the right end pipe (17) is connected with the right vertical plate (142).

6. The telescopic joint with multi-direction displacement compensation function according to claim 5, characterized in that, The left end pipe (16) comprises a left end one pipe (161), a left end two pipe (162) and a left end three pipe (163), the right end pipe (17) comprises a right end one pipe (171), a right end two pipe (172) and a right end three pipe (173), the outer sleeve pipe (6) comprises an outer sleeve one pipe (61) and an outer sleeve two pipe (62), the bellows pipe (3) comprises a bellows one pipe (31) and a bellows two pipe (32), one end of the left end one pipe (161) is connected with the pressure steel pipe, the other end of the left end one pipe (161) is connected with one end of the left end three pipe (163) through the left end two pipe (162), the other end of the left end three pipe (163) is connected with the bellows one pipe (31) and the outer sleeve one pipe (61) respectively, one end of the bellows one pipe (31) away from the left end three pipe (163) is connected with the left end of the intermediate pipe (8), one end of the outer sleeve one pipe (61) away from the left end three pipe (163) is connected with the left end of the intermediate pipe (8) through the sealing assembly (13), one end of the left end one pipe (161) close to the left end two pipe (162) is connected with the flow guide cylinder (2), one end of the right end one pipe (171) is connected with the pressure steel pipe, the other end of the right end one pipe (171) is connected with the right end three pipe (173) through the right end two pipe (172), the other end of the right end three pipe (173) is connected with the bellows two pipe (32) and the outer sleeve two pipe (62) respectively, one end of the bellows two pipe (32) away from the right end three pipe (173) is connected with the right end of the intermediate pipe (8) and the flow guide cylinder (2) respectively, one end of the outer sleeve two pipe (62) away from the right end three pipe (173) is connected with the right end of the intermediate pipe (8) through the sealing assembly (13).

7. The telescopic joint with multi-direction displacement compensation function according to claim 6, characterized in that, The sealing assembly (13) further comprises a check ring (11), the sealing part (7) is used for connecting the outer sleeve pipe (6) and the intermediate pipe (8), and the check ring (11) is used for preventing foreign matters from entering the inside of the bellows pipe (3).

8. The telescopic joint with multi-direction displacement compensation function according to claim 7, characterized in that, The flow guide cylinder (2) comprises a flow guide one cylinder (21) and a flow guide two cylinder (22), the check ring (11) comprises a first check ring (111) and a second check ring (112), one end of the flow guide one cylinder (21) is connected with the left end two pipe (162), the other end of the flow guide one cylinder (21) is connected with the left end of the intermediate pipe (8) through the first check ring (111), one end of the flow guide two cylinder (22) is connected with the bellows two pipe (32), and the other end of the flow guide two cylinder (22) is connected with the right end of the intermediate pipe (8) through the second check ring (112).

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