Pipe jacking base with buffer layer and inner wall close fixing assembly

Abstract

This utility model discloses a jacking pipe base blank inner wall tight-fitting fixing assembly with a buffer layer, belonging to the field of underground pipe jacking processing technology. It includes a base and a jacking pipe base blank. A vertical rod is installed on one side of the top surface of the base, and a fixing frame is installed at the top of the vertical rod. A bidirectional hydraulic cylinder with a rod extension is fixedly installed on the side of the fixing frame by a clamp. Both output ends of the bidirectional hydraulic cylinder with rod extension are provided with connecting seats. A fixing plate is elastically connected to the side of the connecting seat, and the fixing plate presses against the inner wall of the jacking pipe base blank. The side of the connecting seat has a sliding groove, and the interior of the connecting seat has a cavity. The sliding groove and the cavity are connected. A sliding rod that slides within the sliding groove is installed on the side of the fixing plate. A piston that slides within the cavity is installed at the free end of the sliding rod. Several first through holes are opened on the side of the cavity facing the piston, and several second through holes are opened on both sides of the cavity and the piston in contact. A liquid storage cavity is opened inside the connecting seat, and the liquid storage cavity is connected to the several first through holes and the several second through holes.

Description

Technical Field

[0001] This utility model relates to the field of underground pipe jacking technology, specifically a pipe jacking base blank inner wall tight-fitting fixing component with buffer layer. Background Technology

[0002] Before being put into construction, the pipe jacking base blank needs to undergo a series of processing treatments, such as end beveling, inner wall anti-corrosion coating, and joint forming, in order to meet the requirements of pipe connection, sealing and weather resistance.

[0003] During the processing of the jacking pipe billet, to ensure processing accuracy, the billet needs to be stably positioned using fixing components. Currently, the industry commonly uses rigid fixing methods, specifically: directly clamping the outer wall of the billet with metal clamps, or rigidly locking the end of the billet to the processing table with bolts; in some scenarios, even temporary welded supports are used for fixing. While this rigid fixing method provides a certain degree of stability, it has significant drawbacks:

[0004] On the one hand, rigid fixing lacks a buffer structure, and the clamping force acts directly on the surface of the billet, which can easily lead to damage to the billet. For example, concrete billets, due to their high brittleness, may experience surface cracking or edge chipping under rigid clamping; metal billets may undergo plastic deformation due to localized stress concentration, affecting the accuracy of subsequent joint fittings. Especially for thin-walled metal billets, rigid fixing may also damage the anti-corrosion coating on the inner wall, reducing the corrosion resistance of the pipeline.

[0005] On the other hand, the vibrations generated during processing cannot be absorbed by the rigid structure, which will cause a slight relative displacement between the blank and the fixed component, thus affecting the dimensional accuracy of the processing.

[0006] Therefore, there is an urgent need for a jacking pipe billet inner wall tight-fitting fixing component that combines buffer protection and adaptive adjustment capabilities to solve the defects of the existing rigid fixing method and improve the processing quality and efficiency of the jacking pipe billet. Utility Model Content

[0007] The purpose of this invention is to provide a component for tightly fixing the inner wall of a jacking pipe blank with a buffer layer, so as to solve the problems mentioned in the background art.

[0008] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0009] A jacking pipe blank inner wall tight-fitting fixing assembly with a buffer layer includes a base and a jacking pipe blank. A vertical rod is installed on one side of the top surface of the base, and a fixing frame is installed at the top of the vertical rod. A double-acting hydraulic cylinder is fixedly installed on the side of the fixing frame by a clamp. Both output ends of the double-acting hydraulic cylinder are provided with connecting seats. A fixing plate is elastically connected to the side of the connecting seat, and the fixing plate presses against the inner wall of the jacking pipe blank. The side of the connecting seat has a groove, and the interior of the connecting seat has a cavity. The groove and the cavity communicate with each other. A sliding rod is installed on the side of the fixing plate, sliding within the groove. The free end of the sliding rod is equipped with a... The piston slides within the cavity. The cavity has several first through holes on the side facing the piston, and several second through holes on both sides of the cavity that contact the piston. A liquid storage chamber is located inside the connecting seat, communicating with the first and second through holes. Damping oil is provided inside the liquid storage chamber and the cavity. A bidirectional hydraulic cylinder can drive the connecting seats on both sides to expand synchronously, causing the fixing plate to tightly adhere to the inner wall of the jacking pipe blank, achieving stable fixation. The elastic connection and damping oil buffer structure can absorb processing vibrations, avoiding damage to the jacking pipe blank caused by rigid clamping. The liquid storage chamber and through holes cooperate to achieve damping oil circulation, ensuring a stable buffering effect.

[0010] Furthermore, a pair of mounting grooves are provided on the side of the connecting seat, and a spring is installed inside the mounting groove. The spring is connected to the fixing plate, and the spring provides elastic support, so that the contact between the fixing plate and the inner wall of the jacking pipe blank is closer, which can compensate for the minor unevenness of the inner wall of the blank; at the same time, it enhances the buffering effect, further absorbs vibration, and avoids excessive local stress.

[0011] Furthermore, a bellows is connected between the piston and the cavity, and the bellows is fitted on the outside of the slide rod. When the piston slides in the cavity, the bellows expands and contracts accordingly, sealing the damping oil in the space formed by the cavity and the reservoir, preventing oil leakage from affecting the buffering effect, and protecting the sliding parts of the slide rod and piston from contamination by impurities.

[0012] Furthermore, the length and width of the groove are both smaller than the length and width of the cavity. The slide rod and the groove are in contact, and the piston and the cavity are in contact. The fit design of the groove and the slide rod, and the cavity and the piston can limit the lateral sway of the components, ensure that the slide rod and the piston slide stably along the axial direction, and ensure accurate buffering direction.

[0013] Furthermore, a rubber pad is installed on the side of the fixing plate, and the surface of the rubber pad is arc-shaped. The rubber pad is elastic, which can avoid rigid contact between the fixing plate and the inner wall of the jacking pipe blank, and prevent scratches on the surface of the blank or damage to the anti-corrosion layer. The arc-shaped surface fits more tightly with the inner wall of the jacking pipe blank, increases the contact area, improves the fixing stability, and at the same time disperses pressure and reduces local stress.

[0014] Furthermore, both output ends of the bidirectional rod-exit hydraulic cylinder are equipped with flanges, and a fixing rod is installed on the outside of the connecting seat. Several screws connect the fixing rod and the flange, and the flange and the fixing rod are connected by screws, so that the connection between the connecting seat and the output end of the bidirectional rod-exit hydraulic cylinder is firm and reliable, and can transmit a large expansion force; at the same time, it is easy to disassemble and replace the connecting seat, improving the convenience of equipment maintenance.

[0015] Furthermore, a counterweight is installed on the other side of the top surface of the base. The counterweight can balance the weight on one side of the upright, preventing the fixing component from tipping over due to the shift of the center of gravity during the fixing or processing of the jacking pipe blank, thereby improving the stability and safety of the overall structure.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the inner wall of the jacking pipe blank with buffer layer is tightly attached to the fixing component, and the bidirectional hydraulic cylinder can drive the connecting seats on both sides to expand synchronously, so that the fixing plate is tightly attached to the inner wall of the jacking pipe blank, achieving stable fixing; the elastic connection and damping oil buffer structure can absorb processing vibration and avoid damage to the jacking pipe blank caused by rigid clamping; the liquid storage chamber and the through hole cooperate to realize the circulation of damping oil, ensuring stable buffering effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the inner wall fastening assembly of the jacking pipe base blank with buffer layer disclosed in an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 Enlarged schematic diagram of structure A in the middle;

[0019] Figure 3 This is an exploded structural diagram of the inner wall of the jacking pipe base blank with a buffer layer tightly attached to the fixing assembly disclosed in this embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the first cross-sectional structure of the inner wall of the jacking pipe blank with buffer layer tightly attached to the fixing assembly disclosed in this embodiment of the utility model;

[0021] Figure 5 This is a second cross-sectional structural diagram of the inner wall of the jacking pipe blank with a buffer layer tightly attached to the fixing assembly disclosed in an embodiment of this utility model.

[0022] In the diagram: 1. Base; 2. Upright pole; 3. Counterweight; 4. Fixing frame; 5. Two-way hydraulic cylinder; 6. Connecting seat; 7. Jacking pipe blank; 8. Fixing rod; 9. Flange; 10. Screw; 11. Fixing plate; 12. Sliding rod; 13. Piston; 14. Bellows; 15. Cavity; 16. First through hole; 17. Second through hole; 18. Mounting groove; 19. Spring; 20. Slide groove. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a jacking pipe blank inner wall tight-fitting fixing assembly with a buffer layer, including a base 1 and a jacking pipe blank 7. A vertical rod 2 is installed on one side of the top surface of the base 1, and a fixing frame 4 is installed at the top of the vertical rod 2. A bidirectional hydraulic cylinder 5 is fixedly installed on the side of the fixing frame 4 by a clamp. Both output ends of the bidirectional hydraulic cylinder 5 are provided with connecting seats 6. A fixing plate 11 is elastically connected to the side of the connecting seat 6, and the fixing plate 11 presses against the inner wall of the jacking pipe blank 7. The side of the connecting seat 6 has a sliding groove 20, and the interior of the connecting seat 6 has a cavity 15. The sliding groove 20 and the cavity 15 are connected. The fixing plate 11... A slide rod 12 is installed on the side of the slide rod 12 and slides in the slide groove 20. A piston 13 is installed on the free end of the slide rod 12 and slides in the cavity 15. Several first through holes 16 are opened on the side of the cavity 15 facing the piston 13. Several second through holes 17 are opened on both sides of the cavity 15 and the piston 13 that are in contact. A liquid storage chamber is opened inside the connecting seat 6. The liquid storage chamber is connected to several first through holes 16 and several second through holes 17. Damping oil is provided inside the liquid storage chamber and the cavity 15. The output end of the bidirectional rod hydraulic cylinder 5 extends out and pushes the connecting seat 6 and the fixing plate 11 to move to both sides. The fixing plate 11 presses the inner wall of the top tube blank 7 to complete the fixation. The processing vibration causes the fixed plate 11 to drive the slide rod 12 and piston 13 to slide in the slide groove 20 and cavity 15. The piston 13 squeezes the damping oil, which flows into the liquid storage chamber through the first through hole 16 or the second through hole 17, or into the cavity 15 from the second through hole 17 or the first through hole 16. The vibration energy is consumed by the oil resistance, and the elastic structure assists in buffering and reducing the impact on the jacking pipe billet 7.

[0025] As an embodiment of this utility model, a pair of mounting grooves 18 are further provided on the side of the connecting seat 6. A spring 19 is installed inside the mounting groove 18. The spring 19 is connected to the fixing plate 11. When the fixing plate 11 presses the top tube blank 7, the spring 19 is compressed to generate elastic force, so that the fixing plate 11 fits tightly against the inner wall. When subjected to vibration, the spring 19 absorbs part of the energy through expansion and contraction deformation, and together with the damping oil buffer, reduces the impact of vibration on the blank.

[0026] As an embodiment of this utility model, a bellows 14 is further connected between the piston 13 and the cavity 15, and the bellows 14 is fitted on the outside of the slide rod 12. When the piston 13 slides in the cavity 15, the bellows 14 extends and retracts accordingly, sealing the damping oil in the space formed by the cavity 15 and the reservoir, preventing oil leakage from affecting the buffering effect, and protecting the sliding parts of the slide rod 12 and the piston 13 from contamination by impurities.

[0027] As an embodiment of this utility model, the length and width of the slide groove 20 are both smaller than the length and width of the cavity 15. The slide rod 12 is attached to the slide groove 20, and the piston 13 is attached to the cavity 15. When the slide rod 12 slides in the slide groove 20, the inner wall of the slide groove 20 restricts its lateral displacement. When the piston 13 slides in the cavity 15, the inner wall of the cavity 15 also restricts its lateral sway, so that the two can only move along the axial direction, ensuring that the damping oil is subjected to uniform force and the buffering effect is stable.

[0028] As an embodiment of this utility model, a rubber pad is further installed on the side of the fixing plate 11, and the surface of the rubber pad is arc-shaped. The rubber pad directly contacts the inner wall of the top pipe base 7, and its elastic deformation can adapt to the curvature of the inner wall to ensure full fit. The arc-shaped design matches the curvature of the inner wall of the base, increases the friction, prevents the fixing component from sliding relative to the base, and at the same time, the buffering property of the rubber material further reduces vibration and impact.

[0029] As an embodiment of this utility model, further, flanges 9 are installed on both output ends of the bidirectional hydraulic cylinder 5, and a fixing rod 8 is installed on the outside of the connecting seat 6. Several screws 10 are connected between the fixing rod 8 and the flange 9. The screws 10 pass through the fixing rod 8 and are threadedly connected to the flange 9. The connecting seat 6 and the output end of the hydraulic cylinder are fixed together by the pre-tightening force to ensure that the driving force of the hydraulic cylinder can be effectively transmitted to the connecting seat 6, so as to realize the stable expansion of the fixing plate 11.

[0030] As an embodiment of this utility model, a counterweight 3 is further installed on the other side of the top surface of the base 1. The counterweight 3 increases the weight on the other side of the base 1, so that the forces on both sides of the base 1 are balanced, and the eccentric torque generated by the upright 2, hydraulic cylinder and jacking pipe blank 7 is offset, so as to ensure that the entire device is stably placed on the working surface.

[0031] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a control cabinet. The control circuit can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, since this application is mainly used to protect mechanical devices, this application will not explain the control method and circuit connection in detail.

Claims

1. A jacking pipe base blank inner wall tight-fitting fixing assembly with a buffer layer, characterized in that, The system includes a base (1) and a jacking pipe blank (7). A vertical rod (2) is installed on one side of the top surface of the base (1). A fixing frame (4) is installed at the top of the vertical rod (2). A double-acting hydraulic cylinder (5) is fixedly installed on the side of the fixing frame (4) by a clamp. Both output ends of the double-acting hydraulic cylinder (5) are provided with connecting seats (6). A fixing plate (11) is elastically connected to the side of the connecting seat (6), and the fixing plate (11) presses against the inner wall of the jacking pipe blank (7). The side of the connecting seat (6) has a groove (20), and the interior of the connecting seat (6) has a cavity (15). The groove (20) and the cavity (15) 15) Connected, a sliding rod (12) is installed on the side of the fixed plate (11) and slides in the sliding groove (20). A piston (13) is installed on the free end of the sliding rod (12) and slides in the cavity (15). A plurality of first through holes (16) are opened on the side of the cavity (15) facing the piston (13). A plurality of second through holes (17) are opened on both sides of the cavity (15) and the piston (13) that are in contact. A liquid storage chamber is opened inside the connecting seat (6). The liquid storage chamber is connected to a plurality of first through holes (16) and a plurality of second through holes (17). Damping oil is provided inside the liquid storage chamber and the cavity (15).

2. The jacking pipe base blank inner wall tight-fitting fixing assembly with buffer layer according to claim 1, characterized in that, The side of the connecting seat (6) is provided with a pair of mounting slots (18), and a spring (19) is installed inside the mounting slot (18). The spring (19) is connected to the fixing plate (11).

3. The jacking pipe base blank inner wall tight-fitting fixing assembly with buffer layer according to claim 1, characterized in that, A bellows (14) is connected between the piston (13) and the cavity (15), and the bellows (14) is fitted on the outside of the slide rod (12).

4. The jacking pipe base blank inner wall tight-fitting fixing assembly with buffer layer according to claim 1, characterized in that, The length and width of the groove (20) are both smaller than the length and width of the cavity (15). The slide rod (12) is attached to the groove (20), and the piston (13) is attached to the cavity (15).

5. The jacking pipe base blank inner wall tight-fitting fixing assembly with buffer layer according to claim 1, characterized in that, A rubber pad is installed on the side of the fixing plate (11), and the surface of the rubber pad is arc-shaped.

6. The jacking pipe base blank inner wall tight-fitting fixing assembly with buffer layer according to claim 1, characterized in that, The two output ends of the bidirectional hydraulic cylinder (5) are equipped with flanges (9), and the outer side of the connecting seat (6) is equipped with a fixing rod (8). Several screws (10) are connected between the fixing rod (8) and the flange (9).

7. The jacking pipe base blank inner wall tight-fitting fixing assembly with buffer layer according to claim 1, characterized in that, A counterweight (3) is installed on the other side of the top surface of the base (1).

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