Rotating pin for turning over large-size rectangular jacking pipe joint

Abstract

The utility model discloses a rotating pin for turning over a large-size rectangular pipe-jacking pipe joint, and relates to the technical field of pipe-jacking construction, a pressure-bearing mother plate and splicing daughter plates as well as two adjacent groups of splicing daughter plates are inserted and fixed through positioning bolts, plate frames of the pressure-bearing mother plate and the splicing daughter plates are provided with fixing shafts in a penetrating manner, and the fixing shafts are connected with the pressure-bearing mother plate and the splicing daughter plates through bolts. And a pressure-bearing shaft is mounted in the middle of a back plate of the pressure-bearing mother plate. According to the rotating pin for turning over the pipe joint of the jacking pipe, based on the splicing combination of the pressure-bearing mother plate and the splicing daughter plate and under the bolt fastening of the positioning bolt, a proper number of fixing shafts can be assembled according to the self-weight condition of the pipe joint, the fixing shafts are adaptively combined with the pipe joint of the jacking pipe, the pipe joint is more uniformly and stably supported in a multi-shaft supporting state, and the situation that the self-weight of the pipe joint is too large, so that the pipe joint is not damaged is avoided. The rotating pin generates local shear failure or torsion failure, torque can be better conducted, the structure principle is met, the good integral splicing characteristic is achieved, and meanwhile the supporting stress on the pipe joint is more uniform and stable.

Description

Technical Field

[0001] This utility model relates to the field of pipe jacking construction, and in particular to a rotating pin for turning over large-size rectangular pipe jacking sections. Background Technology

[0002] The pipe jacking method uses the jacking force generated by the jacking equipment in the working shaft to overcome the friction between the pipe and the surrounding soil, and pushes the pipe sections into the soil one by one according to the designed slope, and then transports the soil away. Its principle is to use the thrust of the main jacking cylinder and the pipeline and intermediate stations to push the tunneling machine and the jacking pipe sections from the working shaft through the soil layer all the way to the receiving shaft and lift them out to form a tunnel.

[0003] Rectangular pipe jacking technology was introduced to China in the 1990s and underwent in-depth research and application in the early 21st century. The cross-section of rectangular pipe jacking tunnels has evolved from the initial small 2.2m x 2.2m sections to today's ultra-large cross-section rectangular pipe jacking tunnels with sections exceeding 10m and areas exceeding 100㎡. With the continuous increase in cross-section, the size and weight of the pipe jacking tunnel structure—the pipe sections—have also increased, especially the reinforced concrete sections. However, because the connection between pipe sections often uses an "F" socket structure, meaning a steel plate needs to be installed at the socket position, the pipe section fabrication process must be inverted, with the socket at the bottom to fix the steel plate. The steel plate needs to be turned over during storage, with the socket facing down to protect the steel plate. After the pipe section is poured, it needs to be turned over 180° and hoisted before it can be moved to the storage site. On site, a turning frame is often used in conjunction with a crane and lifting equipment for turning. As shown in the Chinese Patent Network, a turning device for large-size rectangular jacking pipe sections (publication announcement number CN215439265U) is used. This type of turning device uses the semi-circular groove on the turning frame as a support carrier, places the main shaft of one side of the spreader beam in it, and fixes the main shaft of the other side to the pipe section. By turning the spreader beam, the pipe section is turned over, completing the turning of the pipe section.

[0004] However, as the cross-section of the pipe section gradually increases, its self-weight also increases. The rotating pin connecting the pipe section and the turning frame is prone to node failure. Simply increasing the pin diameter to improve structural resistance is detrimental to the overall structural integrity, making the node susceptible to failure during tunneling. Therefore, those skilled in the art have provided a rotating pin for turning large rectangular jacking pipe sections to solve the problems mentioned in the background section. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a rotating pin for turning over large-size rectangular jacking pipe sections, which solves the problem that the rotating pin nodes of existing large-size rectangular jacking pipe section turning devices mentioned in the background art are prone to damage.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a rotating pin for turning over large-size rectangular jacking pipe sections, comprising a pressure-bearing mother plate and an assembly sub-plate that is spliced ​​together with the pressure-bearing mother plate;

[0007] The number of the assembled sub-plates is multiple sets, and the multiple sets of assembled sub-plates are symmetrically spliced ​​on both sides of the pressure-bearing mother plate. The pressure-bearing mother plate and the assembled sub-plates, as well as the two adjacent sets of assembled sub-plates, are all fixed by positioning pins.

[0008] The plate frames of the pressure-bearing mother plate and the assembled sub-plate are both connected by a fixed shaft, and a pressure-bearing shaft is installed in the middle of the back plate of the pressure-bearing mother plate.

[0009] The pressure-bearing mother plate includes a pressure-bearing plate, and the two sides of the plate frame of the pressure-bearing plate are symmetrically provided with splicing slots;

[0010] The assembly sub-board includes an assembly board. One side of the assembly board frame has symmetrically arranged extension slots, and the other side of the assembly board frame has symmetrically arranged splicing buckles.

[0011] As a further technical solution of this utility model: the splicing slot and the splicing buckle are mutually interlocked and adapted, and the splicing buckle and the extension slot are mutually interlocked and adapted.

[0012] As a further technical solution of this utility model: a positioning insertion hole A is provided through the middle of the splicing slot;

[0013] The middle of the snap-fit ​​buckle block and the middle of the extended slot are both provided with positioning holes B.

[0014] As a further technical solution of this utility model: the mating ends of the positioning socket A and the positioning socket B, as well as the mating ends of the two adjacent sets of positioning sockets B, are all properly fitted with the positioning pins.

[0015] As a further technical solution of this utility model: the fixed shaft includes a threaded sleeve, and a telescopic screw is screwed through the inside of the threaded sleeve. One end of the telescopic screw is provided with an internal hexagonal nut, and the other end of the telescopic screw is provided with a support shaft.

[0016] As a further technical solution of this utility model: both sides of the bearing shaft are provided with outwardly protruding anti-detachment pins.

[0017] As a further technical solution of this utility model, it also includes a pivot seat for supporting the pressure bearing shaft, wherein the pivot seats are installed in pairs symmetrically on the top of the upright frame of the tilting frame.

[0018] This utility model provides a rotating pin for turning over large-size rectangular jacking pipe sections, which has the following advantages compared with the prior art:

[0019] 1. The rotating pin for turning over the jacking pipe section in this design is based on the splicing combination of the pressure-bearing mother plate and the assembly sub-plate. With the pin fastening of the positioning pin, an appropriate number of fixed shafts can be assembled according to the self-weight of the pipe section. This allows for more uniform and stable support of the pipe section in a multi-axis support state, avoiding local shear or torsional failure of the rotating pin due to excessive self-weight of the pipe section. It also better transmits torque, which is in line with structural principles. On the one hand, it has good integrated assembly characteristics, which can be appropriately matched and assembled according to the self-weight of the pipe section, and has better flexibility and adaptability. On the other hand, it provides more uniform and stable support for the pipe section, improves the self-protection performance of the rotating pin, and provides more stable support for the pipe section.

[0020] 2. The rotating pin used for turning the jacking pipe section in this design is used when the pipe section is hoisted onto the turning frame and the rotating pin needs to be installed. First, the bearing shaft is placed flat in the rotating pin seat at the top of the turning frame. Then, the telescopic adjustable fixed shaft is used, which can be more flexibly adapted to the pipe section for installation. This avoids the fixed shaft extending too far beforehand, which would affect the pipe section being hoisted onto the turning frame. Then, by adapting the fixed shaft to the pipe section and using the rotational adaptation between the bearing shaft and the rotating pin seat, the pipe section can be turned over with the help of external turning equipment. Its on-site installation is flexible and adjustable, and the installation adaptability is simpler and more convenient. Attached Figure Description

[0021] Figure 1 A schematic diagram of a rotating pin used for turning over large rectangular jacking pipe sections;

[0022] Figure 2 Left view of a rotating pin used for turning over large rectangular jacking pipe sections;

[0023] Figure 3 This is a schematic diagram of the unfolded rotating pin used for turning over large rectangular jacking pipe sections;

[0024] Figure 4 This is a schematic diagram of the bearing plate in a rotating pin used for turning over large rectangular jacking pipe sections;

[0025] Figure 5 This is a schematic diagram of a sub-plate assembled in a rotating pin for turning over large rectangular jacking pipe sections;

[0026] Figure 6 This is a schematic diagram of a rotating pin used for turning over large rectangular jacking pipe sections, with a fixed shaft in the middle.

[0027] Figure 7 This is a schematic diagram of a rotating pin-type flipping frame used for flipping large rectangular jacking pipe sections;

[0028] Figure 8This is a schematic diagram of the assembly of a pipe section using a rotating pin for turning over large rectangular jacking pipe sections.

[0029] In the diagram: 1. Pressure bearing plate; 11. Pressure bearing plate; 12. Splicing slot; 13. Positioning hole A; 2. Assembly subplate; 21. Assembly plate; 22. Splicing buckle; 23. Extension slot; 24. Positioning hole B; 3. Positioning pin; 4. Fixed shaft; 41. Threaded sleeve; 42. Telescopic screw; 43. Socket head cap nut; 44. Support shaft; 5. Pressure bearing shaft; 51. Anti-detachment pin; 6. Tilting frame; 7. Rotary pin seat; 8. Pipe section. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-8 This utility model provides a technical solution for a rotating pin used for turning over large-size rectangular jacking pipe sections: A rotating pin for turning over large-size rectangular jacking pipe sections includes a pressure-bearing mother plate 1 and an assembly sub-plate 2 that is spliced ​​with the pressure-bearing mother plate 1. The pressure-bearing mother plate 1 includes a pressure plate 11, and the two sides of the plate frame of the pressure plate 11 are symmetrically provided with splicing slots 12. The assembly sub-plate 2 includes an assembly plate 21, and the one side of the plate frame of the assembly plate 21 is symmetrically provided with an extension slot 23, and the other side of the plate frame of the assembly plate 21 is symmetrically provided with splicing buckles 22. The splicing slots 12 and the splicing buckles 22 are connected. The interlocking buckles 22 and the extension slots 23 are mutually interlocked and adapted. By utilizing the adaptation of the interlocking slots 12 and the interlocking buckles 22, the pressure-bearing mother plate 1 and the assembly sub-plate 2 are spliced ​​together to increase the number of fixed shafts 4 of the support pipe section 8. Based on the adaptation of the interlocking slots 12 and the interlocking buckles 22, the assembly sub-plates 2 can be continuously spliced ​​together to further increase the number of fixed shafts 4 of the support pipe section 8. This provides a more uniform and stable support for the pipe section 8 in a multi-axis support state, avoiding excessive weight of the pipe section 8 and local shearing or torsional damage to the rotating pin, and better transmitting torque.

[0032] The number of assembly sub-plates 2 is multiple, and the multiple sets of assembly sub-plates 2 are symmetrically spliced ​​on both sides of the pressure-bearing mother plate 1. The pressure-bearing mother plate 1 and the assembly sub-plates 2, as well as two adjacent sets of assembly sub-plates 2, are all fixed by positioning pins 3. The center of the splicing slot 12 is provided with a positioning insertion hole A13. The center of the splicing buckle 22 and the center of the extension slot 23 are both provided with positioning insertion holes B24. The positioning insertion holes A13 and B24 are aligned. The mating ends of the end and the two adjacent sets of positioning holes B24 are all properly matched with the positioning pins 3. When the pressure mother plate 1 and the assembly sub-plate 2 are spliced ​​together, and the adjacent assembly sub-plates 2 are spliced ​​together, based on the overlap of their mating end positioning holes, the matching positioning pins 3 can be inserted to fix the combination of the pressure mother plate 1 and the assembly sub-plate 2, and the adjacent assembly sub-plates 2, so that multiple sets of fixed shafts 4 form an integrated support, providing multi-point force support for the pipe section 8.

[0033] Both the pressure-bearing mother plate 1 and the assembly sub-plate 2 are connected by a fixed shaft 4. The fixed shaft 4 includes a threaded sleeve 41, and a telescopic screw 42 is screwed through the threaded sleeve 41. One end of the telescopic screw 42 is provided with an internal hex nut 43, and the other end of the telescopic screw 42 is provided with a support shaft 44. By using a wrench to tighten the internal hex nut 43, the telescopic screw 42 is pushed forward along the threaded sleeve 41, moving the support shaft 44 forward and pushing it into the pipe section 8. The assembly of the fixed shaft 4 and the pipe section 8 is completed by pre-hoisting the pipe section 8 and then telescopically assembling the fixed shaft 4. When hoisting the pipe section 8, the extended fixed shaft 4 is prevented from obstructing the horizontal hoisting of the pipe section 8. Furthermore, by adjusting the telescopic extension of the fixed shaft 4, the pressure-bearing shaft 5 and the pivot seat 7, and the fixed shaft 4 and the pipe section 8 can be properly fitted and assembled, avoiding excessive assembly gaps that could lead to mismatches. The assembly is more flexible and adjustable on site.

[0034] A pressure bearing shaft 5 is installed in the middle of the back plate of the pressure bearing mother plate 1. Both sides of the shaft of the pressure bearing shaft 5 are provided with outward protruding anti-detachment pins 51. By providing anti-detachment pins 51 on both sides of the pressure bearing shaft 5, when the pressure bearing shaft 5 is loaded in the pivot pin seat 7, it can play a locking and limiting function to prevent the pressure bearing shaft 5 from sliding out of the pivot pin seat 7.

[0035] It also includes a pivot seat 7 supporting the pressure bearing shaft 5. The pivot seats 7 are installed symmetrically in pairs on the top of the upright of the tilting frame 6. By setting the pivot seats 7 on the tilting frame 6 as the bearing seats for the rotating pin, after the rotating pin is assembled with the pipe section 8, the self-weight of the pipe section 8 is transferred to the pivot seats 7, and the pipe section 8 is pushed to rotate with the pivot seats 7 as the axis (as shown in the instruction manual). Figure 7 , 8 (As shown).

[0036] The working principle of this utility model is as follows: When turning over a large rectangular jacking pipe section, the support performance of the rotating pin is pre-assembled and adjusted according to the self-weight of the pipe section 8. Then, during the adjustment process, the pressure-bearing mother plate 1 and the assembled sub-plate 2 can be spliced ​​together and positioned using the positioning pin 3 to improve the support node of the rotating pin shaft. Adjacent assembled sub-plates 2 can be continuously spliced ​​together and positioned using the positioning pin 3 to further improve the support node of the rotating pin shaft. This allows the fixed shaft 4, which is compatible with the pipe section 8, to form multiple integrated supports, providing multi-point force support for the pipe section 8.

[0037] After the pipe section 8 is suspended horizontally on the tilting frame 6, the bearing shaft 5 is first placed horizontally in the pivot seat 7. Then, using the fixed shaft 4 with a spiral telescopic function, the internal hex nut 43 is turned with a wrench to push the telescopic screw 42 along the threaded sleeve 41 to move the support shaft 44 forward and push it into the pipe section 8. In a more flexible on-site assembly state, the combination of pivot seat 7, pivot shaft, and pipe section 8 is placed horizontally on the tilting frame 6. Then, based on the tilting and pushing of the external tilting equipment, the pipe section 8 is pushed into the pivot seat 7. With the pivot as the center, the flipping operation is completed on the flipping frame 6. Its rotating pin has good integrated assembly characteristics, which can be appropriately matched and assembled according to the self-weight of the pipe section 8 on site, with better flexibility and adaptability. At the same time, it can support the pipe section 8 more evenly and stably in a multi-axis support state, avoiding the pipe section 8's self-weight being too large and causing local shear or torsional damage to the rotating pin. It can better transmit torque, and the support force on the pipe section 8 is more even and stable. While improving the self-protection performance of the rotating pin, it can also support and flip the pipe section 8 more stably.

[0038] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A rotating pin for turning over large-size rectangular jacking pipe sections, characterized in that, It includes a pressure-bearing mother plate (1) and an assembly sub-plate (2) that is spliced ​​together with the pressure-bearing mother plate (1); The number of the assembly sub-plates (2) is multiple sets, and the multiple sets of assembly sub-plates (2) are symmetrically spliced ​​on both sides of the pressure mother plate (1). The pressure mother plate (1) and the assembly sub-plates (2) as well as the two adjacent sets of assembly sub-plates (2) are all fixed by positioning pins (3). The plate frames of the pressure-bearing mother plate (1) and the assembled sub-plate (2) are both connected by a fixed shaft (4), and a pressure-bearing shaft (5) is installed in the middle of the back plate of the pressure-bearing mother plate (1). The pressure-bearing mother plate (1) includes a pressure-bearing plate (11), and the two sides of the plate frame of the pressure-bearing plate (11) are symmetrically provided with splicing slots (12); The assembly sub-board (2) includes an assembly board (21). One side of the assembly board (21) is provided with an extension slot (23) in a symmetrical manner, and the other side of the assembly board (21) is provided with a splicing buckle (22) in a symmetrical manner.

2. The rotating pin for turning over large-size rectangular jacking pipe sections according to claim 1, characterized in that, The splicing slot (12) and the splicing buckle (22) are mutually matched and the splicing buckle (22) and the extension slot (23) are mutually matched.

3. A rotating pin for turning over large-size rectangular jacking pipe sections according to claim 1, characterized in that, The splicing slot (12) has a positioning insertion hole A (13) through the middle of the slot body; The middle part of the snap-fit ​​buckle (22) and the middle part of the groove of the extension slot (23) are both provided with positioning insertion holes B (24).

4. A rotating pin for turning over large-size rectangular jacking pipe sections according to claim 3, characterized in that, The mating ends of the positioning socket A (13) and positioning socket B (24), as well as the mating ends of the two adjacent sets of positioning sockets B (24), are all properly fitted with the positioning pin (3).

5. A rotating pin for turning over large-size rectangular jacking pipe sections according to claim 1, characterized in that, The fixed shaft (4) includes a threaded sleeve (41), and a telescopic screw (42) is screwed through the inside of the threaded sleeve (41). One end of the telescopic screw (42) is provided with an internal hexagonal nut (43), and the other end of the telescopic screw (42) is provided with a support shaft (44).

6. A rotating pin for turning over large-size rectangular jacking pipe sections according to claim 1, characterized in that, Both sides of the bearing shaft (5) are provided with outwardly protruding anti-detachment pins (51).

7. A rotating pin for turning over large-size rectangular jacking pipe sections according to claim 1, characterized in that, It also includes a pivot seat (7) for supporting the pressure bearing shaft (5), which is installed in pairs symmetrically on the top of the upright of the tilting frame (6).

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