A prefabricated direct-buried heat-insulating pipe joint tensioning device

Abstract

This invention relates to the field of pipeline connection technology, specifically to a prefabricated direct-buried insulated pipe joint tensioning device, comprising an implementation component, a locking component, a synchronization component, a compensation component, and an auxiliary pressure component. In this invention, the synchronization component ensures that the relative tensioning bands are tensioned synchronously, avoiding wrinkles caused by uneven tension on the left and right sides that could affect the final sealing performance. Furthermore, the elastic potential energy stored in multiple energy-storing springs during locking allows for real-time adjustment of the tension during cooling. The synchronization and compensation components simplify the tensioning and subsequent adjustment steps, ensuring effective tensioning while improving operational convenience. By using multiple circumferentially distributed tensioning bands for locking, a multi-joint fastening method is formed. An auxiliary pressure roller applies a combined force towards the center of the joint sleeve at connection section one and connection section two. Compared to existing single-joint locking methods, this results in more uniform locking and force distribution.

Description

Technical Field

[0001] This invention relates to the field of pipeline connection technology, specifically to a prefabricated direct-buried insulated pipe joint tensioning device. Background Technology

[0002] After the prefabricated direct-buried insulated pipe is welded, an insulation layer and an outer protective layer need to be added to the welded area. This process is called joint repair. The main steps are to install the joint repair sleeve onto the connection of the insulated pipe and ensure that the joint repair sleeve is tightly connected to the original outer protective pipe of the pipeline. Then, subsequent steps such as welding fusion, secondary sealing reinforcement, and airtightness testing are carried out on the joint repair sleeve. In order to ensure that the joint repair sleeve fits tightly to the original outer protective pipe of the pipeline, a joint repair tensioning device is required.

[0003] The common tensioning process for joint repair mainly involves installing fastening strips on both sides of the joint and locking the ends of the fastening strips mechanically (such as by bolting). This method of locking the joint sleeve with the fastening strips on both sides completes the tightening action. However, the following problems exist in the current tensioning process: 1. During the installation of the fastening strips on both sides, they are usually installed and locked separately on the left and right sides. As a result, during the tensioning process, one side is tightened to a certain extent first, and then the other side is tightened. This leads to completely different degrees of tightening and stress states on both sides, causing the two ends of the joint sleeve to be in an uneven stress state. Ultimately, this results in gaps between the joint sleeve and the outer protective tube, affecting the overall sealing performance.

[0004] 2. In the existing tensioning process, a single fastening band is usually used for tensioning, meaning that there is only one locking point for the repaired pipe. This results in uneven circumferential pressure on the repaired pipe. Furthermore, the tensioning action causes insufficient pressure at the connection between the beginning and end of the fastening band. Additionally, the pipe undergoes deformation due to thermal expansion and contraction during the welding process, causing changes in tension. Therefore, manual adjustment in real time is required. However, manual real-time adjustment is difficult to control the degree of adjustment and the overall operation is cumbersome. Summary of the Invention

[0005] Therefore, it is necessary to provide a prefabricated direct-buried insulated pipe joint tensioning device to solve the problems of the prior art.

[0006] This application provides a prefabricated direct-buried insulated pipe joint tensioning device, comprising: two implementation components distributed on the left and right sides, the two implementation components being located on the left and right sides of the joint respectively, and each implementation component including multiple tensioning bands, the tensioning bands being composed of connecting section one and connecting section two on both sides and an arc-shaped section located between connecting section one and connecting section two.

[0007] A locking assembly is provided between adjacent connecting sections one and two on the tension belt. The locking assembly includes a threaded rod. A threaded rod is rotatably provided on connecting section one, and a threaded groove is provided on connecting section two to cooperate with the corresponding threaded rod on the adjacent tension belt. A synchronization assembly for synchronizing the locking actions on both sides is provided between the two implementation components.

[0008] The tensioning band is equipped with a compensation component to adapt to the thermal expansion and contraction of the joint. The compensation component includes an energy storage spring and an anti-torsion plate. During the locking process of the threaded rod, the energy storage spring deforms and stores energy. The energy storage spring releases energy, causing the anti-torsion plate to drive the threaded rod to continue rotating under the condition of cold contraction.

[0009] An auxiliary pressure assembly is provided between adjacent connecting sections one and two on the tension belt. The auxiliary pressure assembly includes auxiliary pressure rollers extending left and right along the axis. While locking, the auxiliary pressure rollers press the insulation pipe area between connecting sections one and two.

[0010] According to an advantageous embodiment, a rotating member is fixedly provided at one end of the threaded rod away from the corresponding threaded groove, and a cross-shaped mating groove is provided at the end of the rotating member.

[0011] According to an advantageous embodiment, the synchronization component includes a rotating shaft, on which a rotating shaft corresponding to the threaded rod is rotatably disposed. The axis of the rotating shaft extends from left to right. Both the end of the rotating shaft near the connecting section and the threaded rod are fitted with bevel gears, and adjacent bevel gears mesh.

[0012] The other end of the rotating shaft is rotatably equipped with a telescopic sleeve, and the two telescopic sleeves on the left and right are connected in a horizontal state.

[0013] According to an advantageous embodiment, a slot is provided at the right end of the telescopic sleeve on the left side, and a block is fixedly provided at the left end of the telescopic sleeve on the right side. Both the block and the inner wall of the slot are magnetic, and their magnetic properties are opposite.

[0014] An arc-shaped magnetic sleeve is fixedly installed on the rotating shaft. When the telescopic sleeve is vertical, it is attracted to the magnetic sleeve.

[0015] According to an advantageous embodiment, the compensation assembly further includes fixed shafts, and two mutually symmetrical fixed shafts are fixedly disposed on the end face of the connecting segment two away from the adjacent threaded rod, and a connecting frame is slidably sleeved on the two fixed shafts along the axial direction.

[0016] A torsion bar is provided through the connecting frame, a torsion bar is provided on the end face of the torsion bar facing the corresponding connecting section two, and an energy storage spring is sleeved on the fixed shaft and located between the connecting frame and the connecting section two.

[0017] When the threaded rod rotates and the joint is tightened, the threaded rod pushes the anti-torsion plate to move and causes the energy storage spring to deform and store energy.

[0018] According to an advantageous embodiment, the compensation component further includes a triangular block one, a plurality of circumferentially distributed right-angled triangular blocks one are fixedly disposed on the circumferential surface of the threaded rod, and a triangular block two corresponding to the triangular block one and forming a right-angled triangle is radially slidably disposed on the anti-torsion plate, with the inclined surfaces of the triangular block one and the triangular block two fitting together.

[0019] According to an advantageous embodiment, the inclined surface of the first triangular block faces the rotation direction of the threaded rod when it pushes the anti-torsion plate, and when the threaded rod pushes the anti-torsion plate to move, the inclined surface of the first triangular block pushes the inclined surface of the corresponding second triangular block.

[0020] The anti-torsion shaft has a spiral groove, and a mating block that mates with the spiral groove is fixedly installed on the connecting frame. A damping sleeve is fitted on the anti-torsion shaft and is fixedly installed on the connecting frame.

[0021] The release of the energy storage spring causes the anti-torsion plate to drive the threaded rod to rotate synchronously, compensating for the tightness and adapting to cold contraction.

[0022] The second connecting section is provided with a clearance groove that communicates with the threaded groove and is used to avoid the first triangular block.

[0023] According to an advantageous embodiment, the auxiliary pressure assembly includes movable frames, and two movable frames are rotatably arranged on the opposite surfaces of adjacent connecting sections one and two, distributed to the left and right, with the auxiliary pressure roller rotatably arranged between the corresponding two movable frames.

[0024] Both connecting section one and connecting section two have Z-shaped frames that are movably inserted through them, and both connecting section one and connecting section two have pins inserted into them on the left and right sides to fix the position of the Z-shaped frames.

[0025] In summary, the present invention has the following beneficial effects: the present invention uses a synchronization component to enable the relative tensioning belts to be tensioned synchronously, avoiding the problem of wrinkles affecting the final sealing performance due to different tension on the left and right sides. Furthermore, by utilizing the elastic potential energy stored in multiple energy storage springs during locking, the tension can be adjusted in real time during the cooling process. Moreover, the synchronization component and compensation component simplify the tensioning steps and subsequent adjustment steps, ensuring the tensioning effect of the device while improving the ease of operation of the device.

[0026] By setting multiple circumferentially distributed tensioning bands to lock, a multi-joint fastening method is formed. With the help of auxiliary pressure rollers, a combined force is applied to the splice sleeve at the connecting section one and connecting section two, which is directed towards its center. Compared with the existing single-joint locking method, the locking degree and force are more uniform. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 The diagram shows a three-dimensional structure of a prefabricated direct-buried insulated pipe joint tensioning device after installation, according to an embodiment of the present invention.

[0029] Figure 2 A partial cross-sectional perspective view of the three-dimensional structure between the insulation pipe, the patch sleeve, and the tensioning band provided according to an embodiment of the present invention is shown.

[0030] Figure 3 A three-dimensional structural diagram of the corresponding telescopic sleeve connection provided according to an embodiment of the present invention is shown.

[0031] Figure 4 A three-dimensional structural diagram of the corresponding telescopic sleeve rod when it is disengaged according to an embodiment of the present invention is shown.

[0032] Figure 5 A side view of the tension belt, auxiliary pressure roller, and rotating component provided according to an embodiment of the present invention is shown.

[0033] Figure 6 A top view diagram of the connection segment one, connection segment two, and threaded rod provided according to an embodiment of the present invention is shown.

[0034] Figure 7 The present invention provides an embodiment of the invention. Figure 6 Enlarged view of point A in the middle.

[0035] Figure 8 A three-dimensional structural diagram of triangular block two avoiding triangular block one according to an embodiment of the present invention is shown.

[0036] Figure 9 A three-dimensional structural diagram of triangular block two pushing triangular block one according to an embodiment of the present invention is shown.

[0037] The above-mentioned figures include the following reference numerals: 1. Implementation component; 10. Tensioning belt; 100. Connecting section one; 101. Connecting section two; 102. Arc-shaped section; 2. Locking component; 20. Threaded rod; 21. Rotating component; 22. Connecting groove; 3. Synchronization component; 30. Rotating shaft; 31. Bevel gear; 32. Telescopic sleeve; 33. Slot; 34. Locking block; 35. Magnetic sleeve; 4. Compensation component; 40. Energy storage spring; 41. Anti-torsion plate; 42. Fixed shaft; 43. Connecting frame; 44. Anti-torsion shaft; 440. Triangular block one; 441. Triangular block two; 45. Spiral groove; 46. Mating block; 47. Damping sleeve; 5. Auxiliary pressure component; 50. Auxiliary pressure roller; 51. Movable frame; 52. Z-shaped frame; 53. Pin; 6. Insulation pipe; 7. Repair sleeve. Detailed Implementation

[0038] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] like Figure 1 and Figure 2 As shown, a prefabricated direct-buried insulated pipe joint tensioning device includes: two implementation components 1 distributed on the left and right sides, respectively installed on the left and right sides of the joint of the insulated pipe 6. Each implementation component 1 includes multiple circumferentially distributed tensioning bands 10. Each tensioning band 10 is composed of a connecting section 100 and a connecting section 2 101 on both sides, and an arc-shaped section 102 located between the connecting section 100 and the connecting section 2 101. The arc-shaped section 102 is made of flexible material.

[0040] A locking assembly 2 is provided between adjacent connecting sections 100 and 101 on the tension belt 10. The locking assembly 2 includes a threaded rod 20. The threaded rod 20 is rotatably provided on the connecting section 100, and the connecting section 101 is provided with a threaded groove that cooperates with the corresponding threaded rod 20 on the adjacent tension belt 10. A synchronization assembly 3 for synchronizing the locking actions on both sides is provided between the two implementation components 1.

[0041] like Figure 1 , Figure 2 and Figure 3As shown, the tension band 10 is provided with a compensation component 4 for adapting to the thermal expansion and contraction of the joint. The compensation component 4 includes an energy storage spring 40 and an anti-torsion plate 41. During the locking process of the threaded rod 20, the energy storage spring 40 deforms and stores energy. The energy storage spring 40 releases energy, causing the anti-torsion plate 41 to drive the threaded rod 20 to continue rotating under the condition of cold contraction, thus maintaining the tension of the tension band 10.

[0042] like Figure 1 and Figure 5 As shown, an auxiliary pressure assembly 5 is provided between adjacent connecting sections 100 and 101 on different tensioning belts 10 to press the area between connecting sections 100 and 101. The auxiliary pressure assembly 5 includes auxiliary pressure rollers 50 extending left and right along their axes. While locking, the auxiliary pressure rollers 50 press the area of ​​the insulation pipe 6 between connecting sections 100 and 101.

[0043] During operation, firstly, select the corresponding number of tensioning bands 10 according to the diameter of the patch sleeve 7, and connect all tensioning bands 10 on the same side to each other and install them onto the insulation pipe 6, ensuring that the tensioning bands 10 are 15-20cm away from the edge of the patch sleeve 7, thus forming two tensioning rings on the left and right. Compared with the existing single-joint locking method, the multi-joint locking method ensures uniform locking and force distribution. Then, the left and right tensioning rings are connected by the synchronization component 3, and the threaded rod 20 is continuously rotated by an external drive device held manually. Therefore, the left and right tensioning rings contract synchronously, thereby locking the left and right sides of the patch sleeve 7. Secondly, during the above operation, each locking component 2 is adjusted according to the required position and by the operation method of the external drive device held manually. At the same time, during the locking process, the auxiliary pressure roller 50 in the auxiliary pressure component 5 applies pressure to the area between the adjacent connecting section 100 and connecting section 2 101, avoiding the problem of uneven force distribution between the two areas due to the proximity of connecting section 100 and connecting section 2 101.

[0044] During the aforementioned tensioning process, the rotation of the threaded rod 20 causes the anti-torsion plate 41 to move and the energy storage spring 40 to store energy. It should be noted that the torque provided by the external drive device to the threaded rod 20 enables the anti-torsion plate 41 to move while resisting the reset tendency of the energy storage spring 40. When the insulation pipe 6 is cooled after the joint is repaired, due to the thermal expansion and contraction characteristics of the material, the locking degree of the tensioning ring is insufficient. Therefore, the energy storage spring 40 releases its stored energy and causes the threaded rod 20 to continue rotating, maintaining the locking effect on the joint sleeve 7. It should be noted that the elastic coefficient and material of the energy storage spring 40 are selected through testing by relevant personnel. Secondly, the thermal expansion and contraction of the insulation pipe 6 is limited but will cause the tension of the tensioning ring to decrease. Therefore, the release of the elastic force by the energy storage spring 40 can cause the threaded rod 20 to rotate a small distance. The simultaneous release of stored energy by multiple energy storage springs 40 can increase the tension of the tensioning ring, making it easier to adapt to thermal expansion and contraction.

[0045] like Figure 3 As shown, a rotating component 21 is fixedly provided at one end of the threaded rod 20 away from the corresponding thread groove. A cross-shaped mating groove 22 is provided at the end of the rotating component 21. The threaded rod 20 is rotated by driving a mating component that is compatible with the mating groove 22 to cooperate with the mating groove 22 and drive the mating component to rotate synchronously.

[0046] like Figure 1 , Figure 3 and Figure 4 As shown, the synchronization component 3 includes a rotating shaft 30. A rotating shaft 30 corresponding to the threaded rod 20 is rotatably disposed on the connecting section 100. The axis of the rotating shaft 30 extends from left to right. A bevel gear 31 is sleeved on both the end of the rotating shaft 30 near the connecting section 100 and the threaded rod 20. Two adjacent bevel gears 31 mesh.

[0047] The other end of the rotating shaft 30 is rotatably provided with a telescopic sleeve 32, and the two telescopic sleeves 32 are connected in a horizontal state.

[0048] like Figure 1 , Figure 3 and Figure 4 As shown, the right end of the telescopic sleeve 32 on the left is provided with a slot 33, and the left end of the telescopic sleeve 32 on the right is fixedly provided with a block 34. The inner walls of the block 34 and the slot 33 are both magnetic, and their magnetic properties are opposite.

[0049] An arc-shaped magnetic sleeve 35 is fixedly installed on the rotating shaft 30. When the telescopic sleeve 32 is vertical, the telescopic sleeve 32 is attracted to the magnetic sleeve.

[0050] To facilitate the smooth insertion of the card block 34 into the corresponding card slot 33, the opening of the card slot 33 and the edge of the card block 34 are chamfered.

[0051] Before rotating the threaded rod 20, the telescopic sleeve 32 is manually rotated to disengage it from the magnetic sleeve 35. Therefore, during the rotation of the threaded rod 20, there will be no interference between the telescopic sleeve 32 and the insulation pipe 6. When the tension band 10 is installed onto the insulation pipe 6, the threaded rod 20 initially engages with the corresponding thread groove. Thus, all tension bands 10 are mutually restrained, preventing them from loosening and falling off. Then, the free section of the telescopic sleeve 32 is manually moved, causing the corresponding locking block 34 to engage with the corresponding locking groove 33. The magnetic interaction between the locking block 34 and the inner wall of the locking groove 33 ensures a tight fit, thus synchronizing the connection of two adjacent threaded rods 20. Afterward, a manual drive device is used to engage the docking component with the docking groove 22. The drive device, through the docking component and the docking groove 22, drives the rotating component 21 to rotate synchronously. Therefore, the rotating component 21 drives the corresponding threaded rod 20 and the corresponding bevel gear 31 to rotate. Through the meshing between two adjacent bevel gears 31, the adjacent telescopic sleeve rod 32 of the rotating component 21 rotates synchronously. The telescopic sleeve rod 32 drives the corresponding telescopic sleeve rod 32 and the corresponding bevel gear 31 to rotate synchronously through the cooperation of the locking block 34 and the locking groove 33. Again, through the transmission between the bevel gears 31, the other threaded rod 20 rotates synchronously. In summary, the two threaded rods 20 on the left and right sides rotate synchronously. The above process is repeated on each threaded rod 20 on the same side, thereby forming a locking operation process on both sides synchronously. This avoids the problem that the tension force on the repair sleeve 7 is different due to the asynchronous locking action on the left and right sides, which ultimately leads to the problem that the entire repair sleeve 7 is in an uneven stress state. That is, it avoids the problem of unreliable sealing due to asynchronous locking action.

[0052] It should be further explained that the threads on the left and right opposite threaded rods 20 are in opposite directions. Therefore, after being driven by the bevel gear 31, when the two threaded rods 20 rotate, the corresponding connecting section 100 and connecting section 201 will move closer to each other, that is, a locking action will be performed.

[0053] Secondly, when additional tensioning equipment or tensioning band 10 needs to be installed in the middle area of ​​the repair sleeve 7 during disassembly, the telescopic sleeve 32 is manually rotated and magnetically attracted to the magnetic sleeve 35. Since subsequent welding fusion, secondary sealing reinforcement and airtightness testing are required, the middle area of ​​the repair sleeve 7 is avoided by the above operation method. It also facilitates the disassembly and assembly of the whole device and improves the convenience of the device.

[0054] like Figure 1 , Figure 6 and Figure 7As shown, the compensation component 4 also includes a fixed shaft 42. Two mutually symmetrical fixed shafts 42 are fixedly installed on the end face of the connecting section 2 101 away from the adjacent threaded rod 20. A connecting frame 43 is slidably sleeved on the two fixed shafts 42 along the axial direction.

[0055] A torsion shaft 44 is provided through the connecting frame 43. A torsion plate 41 is disposed on the end face of the torsion shaft 44 facing the corresponding connecting segment 101. An energy storage spring 40 is sleeved on the fixed shaft 42 and located between the connecting frame 43 and the connecting segment 101. When the threaded rod 20 rotates to tighten the joint, the threaded rod 20 pushes the torsion plate 41 to move and causes the energy storage spring 40 to deform and store energy.

[0056] like Figure 1 , Figure 8 and Figure 9 As shown, the compensation component 4 also includes a first triangular block 440. Multiple circumferentially distributed right-angled triangular blocks 440 are fixedly arranged on the circumferential surface of the threaded rod 20. A second triangular block 441 corresponding to the first triangular block 440 and forming a right-angled triangle is radially slidably arranged on the anti-torsion plate 41. The inclined surfaces of the first triangular block 440 and the second triangular block 441 are in contact. A spring rod (not shown in the figure) for resetting is provided between the second triangular block 441 and the anti-torsion plate 41.

[0057] like Figure 7 , Figure 8 and Figure 9 As shown, when the inclined surface of the first triangular block 440 pushes the anti-torsion plate 41 towards the threaded rod 20, the rotation direction of the threaded rod 20 is such that when the threaded rod 20 pushes the anti-torsion plate 41 to move, the inclined surface of the first triangular block 440 pushes the inclined surface of the corresponding second triangular block 441.

[0058] The anti-torsion shaft 44 is provided with a spiral groove 45, and a mating block 46 that mates with the spiral groove 45 is fixedly provided on the connecting frame 43; a damping sleeve 47 is sleeved on the anti-torsion shaft 44 and is fixedly provided on the connecting frame 43. The damping sleeve 47 increases the damping of the anti-torsion shaft 44 when it rotates by increasing the friction between the anti-torsion shaft 44 and the connecting frame 43.

[0059] The release of the energy storage spring 40 causes the anti-torsion plate 41 to drive the threaded rod 20 to rotate synchronously, compensating for the tightness and adapting to cold contraction.

[0060] The connecting section 2 101 is provided with a clearance groove that communicates with the threaded groove and is used to avoid the triangular block 1 440.

[0061] During the installation of the tension belt 10, the threaded rod 20 is manually adjusted so that the first triangular block 440 is aligned with the clearance groove on the second connecting section 101. Then, the threaded rod 20 and the first triangular block 440 pass through the thread groove, and the threaded rod 20 is rotated appropriately to make the threaded rod 20 and the thread groove initially cooperate, thus completing the initial installation of the tension belt 10.

[0062] During the subsequent tensioning action, the threaded rod 20 is rotated by an external drive device, which gradually shortens the distance between the first connecting section 100 and the corresponding second connecting section 101. As a result, the length of the threaded rod 20 passing through the threaded groove gradually increases, and the threaded rod 20 gradually pushes the corresponding anti-torsion plate 41. At this time, the threaded rod 20 drives the first triangular block 440 on it to contact the inclined surface of the second triangular block 441, and pushes the second triangular block 441 away, causing the spring rod to deform, so that the threaded rod 20 can continue to rotate. During this process, the second triangular block 441 avoids or resets through the deformation of the spring rod. It should also be noted that the damping effect of the damping sleeve 47 is greater than the torque generated by friction when the threaded rod 20 contacts the anti-torsion plate 41, so the anti-torsion plate 41 and the anti-torsion shaft 44 will not rotate when the anti-torsion plate 41 is pushed. It should be further noted that a rotating plate for contact can be installed on the end face of the anti-torsion plate 41 that contacts the threaded rod 20 to reduce the friction between the threaded rod 20 and the anti-torsion plate 41.

[0063] When the tensioning process is completed, the threaded rod 20 rotates to the set position. At this time, the energy storage spring 40 completes energy storage. The deformation of the energy storage spring 40 causes the connecting frame 43 to tend to move closer to the connecting section 2 101. However, when the connecting frame 43 moves closer to the connecting section 2 101, the anti-torsion shaft 44 and the anti-torsion plate 41 will rotate due to the cooperation of the spiral groove 45 and the mating block 46 (the rotation direction is the same as the rotation direction during the tensioning process of the threaded rod 20). Indirectly, the anti-torsion plate 41 will drive the threaded rod 20 to continue rotating by contacting the flat surface of the second triangular block 441 with the flat surface of the first triangular block 440. However, since the tensioning belt 10 is completed at this time, the threaded rod 20 does not have a further stroke to rotate, thus maintaining the tendency of the threaded rod 20 to continue rotating.

[0064] As the temperature around the insulation pipe 6 decreases, the expansion and contraction of the patch sleeve 7 and the insulation pipe 6 cause the tension of the tensioning band 10 on the patch sleeve 7 to decrease. Therefore, the threaded rod 20 can continue to rotate, releasing elastic potential energy through the energy storage spring 40. Through the above process, the threaded rod 20 continues to rotate, and the adjacent connecting sections 100 and 2101 continue to move closer, increasing the tension on the patch sleeve 7. In summary, a relatively constant tension is maintained at the patch sleeve 7, avoiding the quality problem of gaps between the patch sleeve 7 and the insulation pipe 6 after complete cooling.

[0065] It should be further explained that during the compensation process described above, multiple energy storage springs 40 automatically adjust in real time according to whether the threaded rod 20 can continue to rotate, ensuring that the tension of the repair sleeve 7 is in a relatively constant state, thus avoiding the cumbersome steps of manual adjustment required in the existing process.

[0066] like Figure 1 and Figure 5 As shown, the auxiliary pressure assembly 5 includes a movable frame 51. Two movable frames 51 are rotatably arranged on the opposite surfaces of adjacent connecting sections 100 and 2101, and the auxiliary pressure roller 50 is rotatably arranged between the corresponding two movable frames 51.

[0067] Both connecting section 100 and connecting section 2 101 have Z-shaped frames 52 corresponding to the movable frame 51 that can be movably passed through them. Pins 53 for fixing the position of the Z-shaped frames 52 are inserted into both connecting section 100 and connecting section 2 101. During the installation and gradual tightening of the tension band 10, both connecting section 100 and connecting section 2 101 drive the movable frame 51 and auxiliary pressure roller 50 to move synchronously. After connecting section 100 and connecting section 2 101 are tightened, the Z-shaped frame 52 applies a force towards the filling sleeve 7 to the movable frame 51. The resultant force of the forces from the two adjacent pressure rollers forms a resultant force on the filling sleeve 7 towards its center, thus ensuring tension on the filling sleeve 7 located in the area between connecting section 100 and connecting section 2 101, ultimately ensuring uniform force distribution throughout.

[0068] Secondly, the Z-shaped bracket 52 is installed by a movable plug-in connection, and the distance between the Z-shaped bracket 52 and the connecting section 100 or the connecting section 2 101 is locked by the pin 53. Therefore, adjusting the position of the Z-shaped bracket 52 is convenient to adapt to the tensioning requirements of the sleeve 7 of different sizes.

[0069] It should be further explained that, compared with the existing technology that uses two independent single-joint fastening bands for joint tensioning, this solution adds a multi-joint tensioning band 10, a locking component 2, a synchronization component 3, a compensation component 4, and an auxiliary pressure component 5. The synchronization component 3 enables the relative tensioning bands 10 to be tensioned synchronously. By utilizing the elastic potential energy stored in multiple energy storage springs 40 during locking, the tension is adjusted in real time during the cooling process. Furthermore, the multi-joint tensioning method, in conjunction with the auxiliary pressure component 5, applies a combined force towards the center of the joint sleeve 7 at the connecting section 100 and connecting section 2101. Compared with the existing single-joint locking method, this solution results in a more uniform locking degree and force distribution. The added components are all existing conventional mechanical parts, which can be used multiple times after a single assembly. The cost of the components is negligible compared to the effects and economic benefits. In summary, this technical solution is a specific improvement made entirely based on and to address the shortcomings of the existing technology.

[0070] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0071] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated direct-buried thermal insulation pipe joint tensioning device, characterized in that, include: Two implementation components are distributed on the left and right sides, respectively. Each implementation component includes multiple tension bands, which are composed of connecting section one and connecting section two on both sides and an arc-shaped section between connecting section one and connecting section two. A locking assembly is provided between adjacent connecting sections one and two on the tension belt. The locking assembly includes a threaded rod. A threaded rod is rotatably provided on connecting section one, and a threaded groove is provided on connecting section two to cooperate with the corresponding threaded rod on the adjacent tension belt. A synchronization assembly for synchronizing the locking actions on both sides is provided between the two implementation components. The synchronization component includes a rotating shaft. A rotating shaft corresponding to the threaded rod is rotatably mounted on the first connecting section. The axis of the rotating shaft extends from left to right. Both the end of the rotating shaft near the first connecting section and the threaded rod are fitted with bevel gears. Two adjacent bevel gears mesh with each other. A telescopic sleeve is rotatably mounted on the other end of the rotating shaft. The left and right telescopic sleeves are connected in a horizontal state. A slot is opened at the right end of the left telescopic sleeve, and a block is fixedly mounted at the left end of the right telescopic sleeve. Both the block and the inner wall of the slot are magnetic, but their magnetic properties are opposite. An arc-shaped magnetic sleeve is fixedly installed on the rotating shaft. When the telescopic sleeve is vertical, the telescopic sleeve is attracted to the magnetic sleeve. The threads on the left and right opposite threaded rods are in opposite directions. After being driven by bevel gears, when the two threaded rods on the left and right opposite sides rotate, the corresponding connecting section one and connecting section two will move closer to each other, that is, a locking action is performed. The tension band is equipped with a compensation component to adapt to the thermal expansion and contraction of the joint. The compensation component includes an energy storage spring and an anti-torsion plate. During the locking process of the threaded rod, the energy storage spring deforms and stores energy. The energy storage spring releases energy, causing the anti-torsion plate to drive the threaded rod to continue rotating under the condition of cold contraction. The compensation component also includes fixed shafts. Two mutually symmetrical fixed shafts are fixedly installed on the end face of the connecting section two away from the adjacent threaded rod. A connecting frame is slidably sleeved on the two fixed shafts along the axial direction. A torsion bar is provided through the connecting frame, a torsion bar is provided on the end face of the torsion bar facing the corresponding connecting section two, and an energy storage spring is sleeved on the fixed shaft and located between the connecting frame and the connecting section two. The compensation component also includes a triangular block 1. Multiple triangular blocks 1, which are circumferentially distributed and form right-angled triangles, are fixedly arranged on the circumferential surface of the threaded rod. A triangular block 2, which corresponds to the triangular block 1 and forms a right-angled triangle, is radially slidably arranged on the anti-torsion plate. The inclined surfaces of triangular blocks 1 and triangular blocks 2 are in contact. The anti-torsion shaft is provided with a spiral groove, and a mating block that mates with the spiral groove is fixedly provided on the connecting frame; a damping sleeve is sleeved on the anti-torsion shaft, and the damping sleeve is fixedly provided on the connecting frame. An auxiliary pressure assembly is provided between adjacent connecting sections one and two on the tension belt. The auxiliary pressure assembly includes auxiliary pressure rollers extending to the left and right along the axis. While locking, the auxiliary pressure rollers press the insulation pipe area between connecting sections one and two.

2. The precast direct-burial thermal-insulation-pipe joint tensioning device according to claim 1, characterized in that: A rotating component is fixedly installed at one end of the threaded rod away from the corresponding thread groove, and a cross-shaped mating groove is opened at the end of the rotating component.

3. The pre-fabricated straight-buried heat-insulating pipe joint tensioning device according to claim 1, characterized in that: When the threaded rod rotates and the joint is tightened, the threaded rod pushes the anti-torsion plate to move and causes the energy storage spring to deform and store energy.

4. The pre-fabricated straight-buried heat-insulating pipe joint tensioning device according to claim 1, characterized in that: When the inclined surface of the first triangular block faces the direction of rotation of the threaded rod when it pushes the anti-torsion plate, the inclined surface of the first triangular block pushes the inclined surface of the corresponding second triangular block. The release of the energy storage spring causes the anti-torsion plate to drive the threaded rod to rotate synchronously, compensating for the tightness and adapting to cold contraction. The second connecting section is provided with a clearance groove that communicates with the threaded groove and is used to avoid the first triangular block.

5. The pre-fabricated straight-buried heat-insulating pipe joint tensioning device according to claim 1, characterized in that: The auxiliary pressure assembly includes movable frames, and two movable frames are rotatably arranged on the opposite surfaces of adjacent connecting sections one and two, which are distributed left and right. The auxiliary pressure roller is rotatably arranged between the corresponding two movable frames. Both connecting section one and connecting section two have Z-shaped frames that are movably inserted through them, and both connecting section one and connecting section two have pins inserted into them on the left and right sides to fix the position of the Z-shaped frames.

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