Multi-stage hydraulic buffer type pipe jacking propelling structure

Abstract

The utility model belongs to the technical field of pipe jacking, and particularly relates to a multi-stage hydraulic buffer type pipe jacking propelling structure which comprises a bottom plate. The top of the bottom plate is fixedly connected with a support. A multi-stage hydraulic oil cylinder is fixedly connected into the support. The output end of the multi-stage hydraulic oil cylinder is fixedly connected with a connecting plate; a plurality of fixing rods are fixedly connected to the side wall of the connecting plate; the fixing rods are distributed in a circumferential array state; the end part of the fixed rod is fixedly connected with a limiting plate; the middle part of the limiting plate is slidably connected with a connecting cylinder; a plurality of buffer springs are fixedly connected to the side wall of the connecting plate; the buffer spring is arranged in the middle of the fixed rod in a sleeving manner; the end part of the buffer spring is fixedly connected to the connecting cylinder; the end part of the connecting cylinder is fixedly connected with a push plate; by means of the structure, deformation of the buffer springs can effectively absorb part of impact force, rigid impact is converted into flexible transmission, the situation that the ends of the pipe joints are cracked and damaged due to overlarge local stress is reduced, and meanwhile the multi-stage hydraulic oil cylinder and the connecting plate can be protected.

Description

Technical Field

[0001] This utility model belongs to the field of pipe jacking technology, specifically a multi-stage hydraulic buffer pipe jacking propulsion structure. Background Technology

[0002] Pipe jacking is a trenchless underground pipeline construction technology. Simply put, it is a process of laying underground pipelines by using specialized equipment to push the pipeline from the working shaft to the receiving shaft without excavating the ground. It is mainly suitable for the construction of urban underground pipelines, especially in areas with heavy traffic, dense buildings, and sensitive surface environment, and can minimize damage to ground traffic, vegetation and surrounding facilities.

[0003] A multi-stage hydraulic cylinder is a special type of hydraulic actuator. Its piston rod consists of multiple nested sleeves that can extend and retract in stages. It has a short length when retracted and a long stroke when extended, enabling long-distance linear motion within a limited space. Pipe jacking devices are usually equipped with multi-stage hydraulic cylinders as the drive source.

[0004] When existing multi-stage hydraulic pipe jacking devices are in use, the push plate is easily subjected to the impact force generated by the sudden change in formation resistance during the process of pushing the pipe. The impact force acting on the push plate may damage the hydraulic cylinder and the connecting parts at the cylinder output end.

[0005] Therefore, this utility model provides a multi-stage hydraulic buffer type pipe jacking propulsion structure. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: The multi-stage hydraulic buffered pipe jacking structure of this utility model includes a base plate; a bracket is fixedly connected to the top of the base plate; a multi-stage hydraulic cylinder is fixedly connected inside the bracket; a connecting plate is fixedly connected to the output end of the multi-stage hydraulic cylinder; multiple fixing rods are fixedly connected to the side wall of the connecting plate; the fixing rods are distributed in a circumferential array; a limiting plate is fixedly connected to the end of the fixing rod; a connecting cylinder is slidably connected to the middle of the limiting plate; multiple buffer springs are fixedly connected to the side wall of the connecting plate; the buffer springs are sleeved in the middle of the fixing rods; the end of the buffer spring is fixedly connected to the connecting cylinder; a push plate is fixedly connected to the end of the connecting cylinder; through the above structure, the deformation of the buffer spring can effectively absorb part of the impact force, converting rigid impact into flexible transmission.

[0008] Preferably, the side wall of the base plate is fixedly connected to two sets of fixing plates; the two sets of fixing plates are symmetrically arranged; the top of the fixing plate is threadedly connected to a screw; the top of the screw is fixedly connected to an adjustment handle; the bottom of the screw is rotatably connected to a support; the support is truncated cone-shaped; through the above structure, the height of the fixing plate can be effectively adjusted, making the base plate more stable.

[0009] Preferably, two guide platforms are fixed to the top of the base plate; the two guide platforms are symmetrically arranged; the guide platforms are located at the end away from the support; multiple connecting rods are fixed to the side wall of the guide platform; the connecting rods are distributed in a linear array; a roller is rotatably connected to the middle of the connecting rod; through the above structure, the guide platforms can effectively support and guide the pipe section, making the movement path of the pipe section more accurate.

[0010] Preferably, the side wall of the bracket is slidably connected with multiple guide rods; the guide rods are distributed in a circumferential array; the ends of the guide rods are fixed to the side wall of the connecting plate; a limit block is fixed to the end of the guide rod away from the connecting plate; through the above structure, the connecting plate can be effectively guided, reducing the shaking of the connecting plate during movement.

[0011] Preferably, a positioning rod is fixedly connected to the side wall of the push plate; the positioning rod is located at the center of the push plate; through the above structure, the positioning rod can effectively position the top iron and reduce the displacement of the top iron position during the jacking process.

[0012] Preferably, a buffer pad is bonded to the side wall of the push plate; the buffer pad is made of rubber; through the above structure, the buffer pad can effectively absorb the energy impact of the pipeline on the push plate, further reducing the damage to the multi-stage hydraulic cylinder.

[0013] Preferably, the adjustment handle is in the shape of a straight line; the outer part of the adjustment handle is made of rubber; with the above structure, the adjustment handle can better adapt to the shape of the hand and is more comfortable to hold.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The multi-stage hydraulic buffered pipe jacking structure of this utility model, by activating the multi-stage hydraulic cylinders, pushes the connecting plate to move, and the moving connecting plate drives the push plate to perform the jacking operation. When encountering a sudden change in resistance, an instantaneous impact force is generated, which is concentrated on the push plate. At this time, the fixed rod and the limiting plate slide inside the connecting cylinder, and the buffer spring undergoes elastic deformation, which can effectively absorb part of the impact force, converting rigid impact into flexible transmission, reducing the occurrence of cracks and damage at the pipe section end due to excessive local stress, and also protecting the multi-stage hydraulic cylinders and the connecting plate.

[0016] 2. The multi-stage hydraulic buffer type pipe jacking propulsion structure of this utility model, by rotating the adjustment handle, drives the screw to rotate on the fixed plate. While the screw rotates, it moves in the vertical direction, and the position and height of the fixed plate change due to the movement of the screw. This structure can effectively adjust the height of the fixed plate, making the bottom plate more stable and greatly improving the stability of the propulsion structure. At the same time, it can also adjust the height of the bottom plate, so that the position and height of the push plate and the pipe section receiving well are more matched. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a cross-sectional view of the push plate in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the multi-stage hydraulic cylinder in this utility model;

[0021] Figure 4 This is a cross-sectional view of the roller in this utility model.

[0022] In the diagram: 1. Base plate; 11. Bracket; 12. Multi-stage hydraulic cylinder; 13. Connecting plate; 14. Fixing rod; 15. Limiting plate; 16. Connecting cylinder; 17. Buffer spring; 18. Push plate; 2. Fixing plate; 21. Screw; 22. Adjusting handle; 23. Support; 3. Guide table; 31. Connecting rod; 32. Roller; 4. Guide rod; 41. Limiting block; 5. Positioning rod; 6. Buffer pad. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] like Figures 1 to 3As shown in the embodiment of this utility model, the multi-stage hydraulic buffered pipe jacking structure includes a base plate 1; a bracket 11 is fixedly connected to the top of the base plate 1; a multi-stage hydraulic cylinder 12 is fixedly connected inside the bracket 11; a connecting plate 13 is fixedly connected to the output end of the multi-stage hydraulic cylinder 12; multiple fixing rods 14 are fixedly connected to the side wall of the connecting plate 13; the fixing rods 14 are distributed in a circumferential array; a limiting plate 15 is fixedly connected to the end of the fixing rod 14; a connecting cylinder 16 is slidably connected to the middle of the limiting plate 15; multiple buffer springs 17 are fixedly connected to the side wall of the connecting plate 13; the buffer springs 17 are sleeved in the middle of the fixing rods 14; the ends of the buffer springs 17 are fixedly connected to the connecting cylinder 16; a push plate 18 is fixedly connected to the end of the connecting cylinder 16; in operation... During operation, the multi-stage hydraulic cylinder 12 is activated, which pushes the connecting plate 13 to move. The movement of the connecting plate 13 drives the push plate 18 to advance. When the multi-stage hydraulic cylinder 12 starts or stops, or when there is a sudden change in the formation resistance, an instantaneous impact force will be generated. The impact force will be concentrated on the push plate 18. At this time, the fixed rod 14 and the limiting plate 15 slide inside the connecting cylinder 16, and the buffer spring 17 will undergo elastic deformation. Through the above structure, the deformation of the buffer spring 17 can effectively absorb part of the impact force, converting rigid impact into flexible transmission, reducing the possibility of cracks or damage at the end of the pipe section due to excessive local stress, and also protecting the multi-stage hydraulic cylinder 12 and the connecting plate 13.

[0026] like Figure 1 As shown, two sets of fixing plates 2 are fixed to the side wall of the base plate 1; the two sets of fixing plates 2 are symmetrically arranged; a screw 21 is threadedly connected to the top of the fixing plate 2; an adjusting handle 22 is fixedly connected to the top of the screw 21; a support 23 is rotatably connected to the bottom of the screw 21; the support 23 is frustoconical in shape; during operation, the placement surface of the base plate 1 may be unstable. By rotating the adjusting handle 22, the screw 21 is driven to rotate on the fixing plate 2. As the screw 21 rotates, it moves along the vertical direction. The movement of the screw 21 causes the position and height of the fixing plate 2 to change. Through the above structure, the height of the fixing plate 2 can be effectively adjusted, making the base plate 1 more stable and greatly improving the stability of the propulsion structure. At the same time, the height of the base plate 1 can also be adjusted to make the position and height of the push plate 18 and the pipe section receiving well more matched.

[0027] like Figure 1 and Figure 4As shown, two guide platforms 3 are fixed to the top of the base plate 1; the two guide platforms 3 are symmetrically arranged; the guide platform 3 is located at the end away from the support 11; multiple connecting rods 31 are fixed to the side wall of the guide platform 3; the connecting rods 31 are distributed in a linear array; a roller 32 is rotatably connected to the middle of the connecting rod 31; during operation, the pipe section is placed on the top of the guide platform 3, and the pipe section contacts the middle of the roller 32. When the push plate 18 pushes the pipe section to move, the pipe section slides along the guide platform 3. At this time, the roller 32 will rotate in the middle of the connecting rod 31. Through the above structure, the guide platform 3 can effectively support and guide the pipe section, making the path of pipe section movement more accurate. The setting of the connecting rods 31 makes the movement of the pipe section smoother.

[0028] like Figure 1 and Figure 3 As shown, multiple guide rods 4 are slidably connected to the side wall of the support 11; the guide rods 4 are distributed in a circumferential array; the ends of the guide rods 4 are fixed to the side wall of the connecting plate 13; a limiting block 41 is fixed to the end of the guide rod 4 away from the connecting plate 13; during operation, when the multi-stage hydraulic cylinder 12 drives the connecting plate 13 to move, the connecting plate 13 will drive the guide rods 4 to slide on the support 11, and the limiting block 41 limits the sliding distance of the guide rods 4. Through the above structure, the connecting plate 13 can be effectively guided, reducing the shaking of the connecting plate 13 during movement, making the force on the connecting plate 13 more uniform, thereby improving the effect of pipe section propulsion.

[0029] like Figure 1 As shown, a positioning rod 5 is fixed to the side wall of the push plate 18; the positioning rod 5 is located at the center of the push plate 18; during operation, the advancing length of the multi-stage hydraulic cylinder 12 is limited, and a top iron is usually set between the push plate 18 and the pipe section to compensate for the stroke difference. The positioning rod 5 is set on the push plate 18, and the top iron is inserted into the positioning rod 5 for advancement. Through the above structure, the positioning rod 5 can effectively position the top iron, reduce the displacement of the top iron position during the jacking process, and thus improve the effect of pipe jacking.

[0030] like Figure 1 As shown, a buffer pad 6 is bonded to the side wall of the push plate 18; the buffer pad 6 is made of rubber; during operation, the buffer pad 6 is set on the push plate 18. The buffer pad 6 is made of rubber and has good elasticity. Through the above structure, the buffer pad 6 can effectively absorb the energy impact of the pipeline on the push plate 18, further reducing the damage to the multi-stage hydraulic cylinder 12 and improving the safety of the propulsion structure.

[0031] like Figure 1As shown, the adjustment handle 22 is in the shape of a straight line; the outer part of the adjustment handle 22 is made of rubber; when working, the adjustment handle 22 is in the shape of a straight line and the outer part is made of rubber, which is soft. Through the above structure, the adjustment handle 22 can better adapt to the shape of the hand, making it more comfortable to hold and reducing the chance of hand slippage.

[0032] During operation, the multi-stage hydraulic cylinder 12 is activated, pushing the connecting plate 13 to move. The movement of the connecting plate 13, in turn, drives the push plate 18 to advance. When the multi-stage hydraulic cylinder 12 starts or stops, or when there is a sudden change in ground resistance, an instantaneous impact force is generated. This impact force is concentrated on the push plate 18. At this time, the fixed rod 14 and the limiting plate 15 slide inside the connecting cylinder 16, causing the buffer spring 17 to undergo elastic deformation. Through this structure, the deformation of the buffer spring 17 can effectively absorb part of the impact force, converting rigid impact into flexible transmission, reducing the possibility of cracks or damage at the pipe section end due to excessive local stress. It also protects the multi-stage hydraulic cylinder 12 and the connecting plate 13. The placement surface of the base plate 1 may... If the position is unstable, rotate the adjustment handle 22. As the handle rotates, it drives the screw 21 to rotate on the fixed plate 2. The screw 21 moves vertically as it rotates, causing a change in the height of the fixed plate 2. This structure effectively adjusts the height of the fixed plate 2, making the base plate 1 more stable and greatly improving the stability of the propulsion structure. It also adjusts the height of the base plate 1 to better match the position of the push plate 18 with the pipe section receiving well. The pipe section is placed on top of the guide platform 3, with the pipe section contacting the middle of the roller 32. When the push plate 18 pushes the pipe section, it slides along the guide platform 3. At this time, the roller 32 rotates at the middle of the connecting rod 31. Through the above structure, the guide plate 3 can effectively support and guide the pipe section, making the movement path of the pipe section more accurate. The setting of the connecting rod 31 makes the movement of the pipe section smoother. When the multi-stage hydraulic cylinder 12 drives the connecting plate 13 to move, the connecting plate 13 will drive the guide rod 4 to slide on the bracket 11. The limiting block 41 limits the sliding distance of the guide rod 4. Through the above structure, the connecting plate 13 can be effectively guided, reducing the shaking of the connecting plate 13 during movement, making the force on the connecting plate 13 more uniform, thereby improving the pipe section pushing effect. The pushing length of the multi-stage hydraulic cylinder 12 is limited. Usually, a top iron is set between the push plate 18 and the pipe section to compensate for the stroke difference. A positioning rod 5 is installed on the push plate 18. The top iron is inserted into the positioning rod 5 for pushing. Through the above structure, the positioning rod 5 can effectively position the top iron, reduce the displacement of the top iron position during the pushing process, and thus improve the pushing effect of the pipe. A buffer pad 6 is installed on the push plate 18. The buffer pad 6 is made of rubber and has good elasticity. Through the above structure, the buffer pad 6 can effectively absorb the energy impact of the pipe on the push plate 18, further reducing the damage to the multi-stage hydraulic cylinder 12 and improving the safety of the pushing structure. The adjusting handle 22 is in the shape of a straight line and the outside is made of rubber. The handle is soft. Through the above structure, the adjusting handle 22 can better adapt to the shape of the hand, making it more comfortable to hold and reducing the slippage of the hand when holding it.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage hydraulic buffer-type pipe jacking propulsion structure, characterized in that: The system includes a base plate (1); a bracket (11) is fixedly connected to the top of the base plate (1); a multi-stage hydraulic cylinder (12) is fixedly connected inside the bracket (11); a connecting plate (13) is fixedly connected to the output end of the multi-stage hydraulic cylinder (12); a plurality of fixing rods (14) are fixedly connected to the side wall of the connecting plate (13); the fixing rods (14) are arranged in a circular array; a limiting plate (15) is fixedly connected to the end of the fixing rod (14); a connecting cylinder (16) is slidably connected to the middle of the limiting plate (15); a plurality of buffer springs (17) are fixedly connected to the side wall of the connecting plate (13); the buffer springs (17) are sleeved in the middle of the fixing rods (14); the end of the buffer springs (17) is fixedly connected to the connecting cylinder (16); and a push plate (18) is fixedly connected to the end of the connecting cylinder (16).

2. The multi-stage hydraulic buffered pipe jacking structure according to claim 1, characterized in that: The side wall of the base plate (1) is fixed with two sets of fixing plates (2); the two sets of fixing plates (2) are arranged symmetrically; the top of the fixing plate (2) is threaded with a screw (21); the top of the screw (21) is fixed with an adjusting handle (22); the bottom of the screw (21) is rotatably connected with a support (23); The support (23) is arranged in the shape of a frustum.

3. The multi-stage hydraulic buffered pipe jacking structure according to claim 1, characterized in that: The top of the base plate (1) is fixed with two guide platforms (3); the two guide platforms (3) are arranged symmetrically; the guide platform (3) is located at the end away from the bracket (11); the side wall of the guide platform (3) is fixed with multiple connecting rods (31); the connecting rods (31) are distributed in a linear array. A roller (32) is rotatably connected to the middle of the connecting rod (31).

4. The multi-stage hydraulic buffered pipe jacking structure according to claim 1, characterized in that: The side wall of the bracket (11) is slidably connected with a plurality of guide rods (4); the guide rods (4) are distributed in a circular array; the ends of the guide rods (4) are fixed to the side wall of the connecting plate (13); The guide rod (4) is fixed to a limit block (41) at the end away from the connecting plate (13).

5. The multi-stage hydraulic buffered pipe jacking structure according to claim 1, characterized in that: A positioning rod (5) is fixed to the side wall of the push plate (18); the positioning rod (5) is located at the center of the push plate (18).

6. The multi-stage hydraulic buffered pipe jacking structure according to claim 1, characterized in that: The side wall of the push plate (18) is bonded with a buffer pad (6); the buffer pad (6) is made of rubber.

7. The multi-stage hydraulic buffered pipe jacking structure according to claim 2, characterized in that: The adjustment handle (22) is in the shape of a straight line; the outside of the adjustment handle (22) is made of rubber.

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