Retaining device for pipeline jacking construction

Abstract

The utility model discloses a retaining device for pipe jacking construction, which comprises a positioning box body and a pipe jacking track, a limiting telescopic mechanism is arranged in the positioning box body, the top end of the limiting telescopic mechanism is fixedly connected with a retaining plate, the bottom surfaces of the two sides of the retaining plate are fixedly provided with stop blocks, and the stop blocks are fixedly connected with the limiting telescopic mechanism. And positioning mounting mechanisms are symmetrically mounted on the two sides of the positioning box body. According to the retaining device for pipe jacking construction of the pipeline, the limiting telescopic mechanism is arranged, the retaining plate and the stop block can be pressed downwards through the gravity of the pipeline, and then the limiting telescopic mechanism can be compressed, so that the pipeline smoothly moves on the pipe jacking track and the top face of the retaining plate in the pipe jacking process, and after jacking is conducted, the retaining plate is not prone to falling off. And the limiting telescopic mechanism can reset the retaining plate and the stop block, so that the pipeline can be effectively limited and retained by the reset retaining plate and the reset stop block, and the operation convenience and the structure simplicity of the retaining device for pipeline jacking construction are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline jacking construction, in particular to a withdrawal prevention device for pipeline jacking construction. Background Art

[0002] During the process of pipe jacking, before the previous section is pushed in and the next section is lowered, the jack and the jacking iron will retract to leave space. At this time, after the previous section of the pipe jacking loses its backward thrust, the pipe may retreat under the action of the soil pressure in front. Therefore, a retreat-stopping device is needed to prevent the retreat and improve the stability of the pipe jacking construction. However, the existing retreat-stopping device for pipe jacking construction still has certain defects during use;

[0003] As proposed in the application number CN202120756291.2, a tunnel engineering jacking construction anti-retraction device comprises a supporting frame, a guide slide rail is provided above the supporting frame, a fixed frame is provided on the guide slide rail, a symmetrically arranged clamping hydraulic cylinder is provided on the outer wall of the fixed frame, the piston rod of the clamping hydraulic cylinder horizontally penetrates the fixed frame, the end of the piston rod of the clamping hydraulic cylinder is provided with a side limit ring for clamping the jacking pipe, the top and bottom of the fixed frame are provided with a mounting seat, and the inside of the mounting seat is provided with a locking mechanism for fixing the edge of the jacking pipe. A limit lever is fixed, and a storage groove is provided inside the mounting seat. A limit hydraulic cylinder is provided inside the storage groove for driving the limit lever to move vertically. In actual use, the application adopts a clamping hydraulic cylinder and a side limit ring to limit the side wall of the jacking pipe, and at the same time, the limit hydraulic cylinder drives the limit lever to limit and fix the end face of the jacking pipe to achieve the anti-retraction work. However, this anti-retraction method has a complex structure and requires active control of the hydraulic cylinder. Therefore, it is impossible to achieve automatic anti-retraction work during the jacking process, which increases the difficulty of operation and the complexity of the structure.

[0004] Therefore, we propose a kind of anti-retraction device for pipeline jacking construction, so as to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a withdrawal prevention device for pipe jacking construction, so as to solve the problems of complex structure and increased difficulty in operation proposed by the above-mentioned background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: a pipeline jacking construction anti-retraction device, comprising a positioning box and a jacking track,

[0007] A limited telescopic mechanism is installed inside the positioning box body, and a stop plate is fixedly connected to the top of the limited telescopic mechanism;

[0008] Stop blocks are fixedly installed on the bottom surfaces of both sides of the stop plate;

[0009] Positioning and mounting mechanisms are symmetrically mounted on both sides of the positioning box body, and a clamping groove is provided on the inner side of the top pipe rail.

[0010] Preferably, the limiting telescopic mechanism includes an outer sleeve installed at equal intervals on the inner bottom surface of the positioning box body, the inner ring of the outer sleeve is fit-connected with the middle sleeve, the inner ring of the middle sleeve is fit-connected with the inner sleeve rod, the top of the inner sleeve rod is fixedly connected to the backstop plate, the outer rings of the outer sleeve, the middle sleeve and the inner sleeve rod are provided with a telescopic spring, and the upper and lower ends of the telescopic spring are respectively fixedly connected to the backstop plate and the positioning box body.

[0011] Preferably, the outer sleeve, the middle sleeve and the inner sleeve rod form a sliding telescopic structure, and the stop plate is telescopically connected to the positioning box body through a telescopic spring.

[0012] The above-mentioned structural design makes it easier for the limiting telescopic mechanism to cooperate with the anti-retraction plate and the blocking block to extend and retract, which is beneficial to utilizing the gravity of the pipeline for contraction to avoid affecting the pipeline jacking operation. At the same time, it is beneficial to drive the anti-retraction plate and the blocking block to automatically reset at the end of the jacking to achieve the anti-retraction work of the pipeline, thereby improving the structural simplicity and operational convenience of the anti-retraction device for pipeline jacking construction.

[0013] Preferably, the blocking blocks are symmetrically distributed about the center line of the backstop plate, and the blocking blocks are arranged in a trapezoidal structure.

[0014] The above structural design makes it easier for the blocking block to increase the contact area with the pipeline, thereby increasing the force-bearing area and blocking area of ​​the anti-retreat plate, which is beneficial for blocking and anti-retreat work on a large area of ​​the pipeline and improves the stability of the anti-retreat work.

[0015] Preferably, the positioning installation mechanism includes a limit seat symmetrically installed on both sides of the positioning box body, a movable rod sliding through the interior of the limit seat, a clamping block is fixedly installed at one end of the movable rod, a connecting plate is fixedly sleeved at the other end of the movable rod, a sliding limit rod passes through one end of the connecting plate, one end of the limit rod is fixedly connected to the limit seat, a reset spring is provided on the outer ring of the limit rod, and the two ends of the reset spring are respectively connected to the limit rod and the connecting plate.

[0016] Preferably, the movable rod is connected by engaging with the engaging groove via a clamping block, and the connecting plate forms a limiting telescopic structure with the limiting rod via a reset spring.

[0017] The design of the above structure makes it easy to utilize the elastic expansion and contraction of the positioning and installation mechanism to control the engagement and separation between it and the card slot, which is beneficial to the fixed connection between the positioning box body and the top pipe rail when engaged to achieve convenient installation work, and is also beneficial to the separation between the positioning box body and the top pipe rail when separated to achieve convenient disassembly work, thereby improving the convenience of disassembly and assembly.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the anti-retraction device for pipeline jacking construction;

[0019] 1. A limited telescopic mechanism is provided, and the gravity of the pipeline itself can be used to press down the stop plate and the blocking block, thereby compressing the limited telescopic mechanism, so that the pipeline can move smoothly on the top surface of the jacking track and the stop plate during the jacking process. After jacking, the limited telescopic mechanism can reset the stop plate and the blocking block, which is conducive to the effective limit and stop of the pipeline by the reset stop plate and the blocking block, thereby improving the convenience of operation and the simplicity of structure of the stop device for pipeline jacking construction;

[0020] 2. A positioning and mounting mechanism is provided, so that the positioning box body can be fixedly connected to the jacking rail through the engagement between the positioning and mounting mechanism and the card slot. At the same time, it is also convenient to use the elastic structure of the positioning and mounting mechanism to realize the rapid disassembly of the positioning box body, thereby improving the convenience of installation and disassembly of the anti-retraction device for pipeline jacking construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a side view of the structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the side section of the positioning box body and the contraction structure of the limiting telescopic mechanism of the utility model;

[0023] Figure 3 It is a schematic diagram of the side section structure of the position limiting telescopic mechanism of the utility model;

[0024] Figure 4 This is a schematic diagram of the separation structure of the positioning and installation mechanism and the card slot of the utility model;

[0025] Figure 5 It is a schematic diagram of the side section structure of the positioning and installation mechanism of the utility model.

[0026] In the figure: 1. positioning box body; 2. limiting telescopic mechanism; 201. outer sleeve; 202. middle sleeve; 203. inner sleeve rod; 204. telescopic spring; 3. stop plate; 4. blocking block; 5. positioning installation mechanism; 501. limiting seat; 502. movable rod; 503. clamping block; 504. connecting plate; 505. limiting rod; 506. reset spring; 6. top pipe track; 7. clamping slot. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5 The utility model provides a technical solution: a backstop device for pipe jacking construction, comprising a positioning box body 1 and a jacking track 6, a limited telescopic mechanism 2 is installed inside the positioning box body 1, and a backstop plate 3 is fixedly connected to the top of the limited telescopic mechanism 2, and the limited telescopic mechanism 2 includes an outer sleeve 201 installed at equal intervals on the bottom surface of the inner part of the positioning box body 1, the inner ring of the outer sleeve 201 is fitted and connected with a middle sleeve 202, and the inner ring of the middle sleeve 202 is fitted and connected with an inner sleeve rod 203, and the top of the inner sleeve rod 203 is fixed to the backstop plate 3. The outer sleeve 201, the middle sleeve 202 and the inner sleeve rod 203 are fixedly connected, and the outer ring sleeves are provided with telescopic springs 204. The upper and lower ends of the telescopic springs 204 are fixedly connected to the stop plate 3 and the positioning box body 1 respectively. The outer sleeve 201, the middle sleeve 202 and the inner sleeve rod 203 constitute a sliding telescopic structure. The stop plate 3 is telescopically connected to the positioning box body 1 through the telescopic spring 204. The bottom surfaces of both sides of the stop plate 3 are fixedly installed with blocking blocks 4. The blocking blocks 4 are symmetrically distributed about the center line of the stop plate 3, and the blocking blocks 4 are arranged in a trapezoidal structure;

[0029] The design of the above structure ensures that during the process of installing and jacking the pipeline, the gravity of the pipeline itself will be applied to the top surface of the anti-recognition plate 3, thereby causing the anti-recognition plate 3 to descend and compress the telescopic spring 204. At the same time, the outer sleeve 201, the middle sleeve 202 and the inner sleeve rod 203 will also slide and shrink. At this time, the top surface of the anti-recognition plate 3 fits with the bottom surface of the pipeline to ensure the smoothness of the contact surface and reduce resistance. At the same time, the elastic force of the telescopic spring 204 should be controlled to prevent its excessive elastic force from causing the anti-recognition plate 3 to easily lift the pipe section and deviate. Then, the pipeline can be smoothly pushed forward on the top surface of the jacking rail 6 and the anti-recognition plate 3. When the jacking is completed, the pressure of the pipeline on the anti-recognition plate 3 disappears. At this time, the telescopic spring 204 will push the anti-recognition plate 3 and the blocking block 4 to expand and reset. At the same time, the outer sleeve 201, the middle sleeve 202 and the inner sleeve rod 203 will also expand with the sliding. The reset anti-recognition plate 3 and the blocking block 4 can limit the pipeline after jacking to prevent it from retreating and realizing the anti-recognition work.

[0030] The positioning and mounting mechanisms 5 are symmetrically installed on both sides of the positioning box body 1, and a card slot 7 is provided on the inner side of the top pipe track 6. The positioning and mounting mechanisms 5 include limit seats 501 symmetrically installed on both sides of the positioning box body 1, and a movable rod 502 is slidably penetrated inside the limit seat 501, and a clamping block 503 is fixedly installed on one end of the movable rod 502. The movable rod 502 is connected with the card slot 7 through the clamping block 503, and the other end of the movable rod 502 is fixedly sleeved with a connecting plate 504, and a sliding limit rod 505 is penetrated inside one end of the connecting plate 504, and one end of the limit rod 505 is fixedly connected with the limit seat 501, and the outer ring of the limit rod 505 is provided with a reset spring 506, and the two ends of the reset spring 506 are respectively connected to the limit rod 505 and the connecting plate 504, and the connecting plate 504 forms a limit telescopic structure with the limit rod 505 through the reset spring 506;

[0031] The design of the above structure enables, when installing and disassembling the anti-retraction device for pipe jacking construction, the connecting plate 504 can be pushed and reset by the reset spring 506, so that the connecting plate 504 can slide and retract on the limiting rod 505 in a limiting manner, and in the process of sliding and retracting, the movable rod 502 will be synchronously driven to slide and retract inside the limiting seat 501, which is beneficial to drive the block 503 to separate from the slot 7 during the contraction process, thereby facilitating the separation of the positioning box body 1 and the pipe jacking track 6 to realize the disassembly of the anti-retraction device for pipe jacking construction, and at the same time, it is beneficial to drive the block 503 to form an engagement with the slot 7 during the extension process, thereby facilitating the fixed connection between the positioning box body 1 and the pipe jacking track 6, thereby realizing a stable and convenient installation of the anti-retraction device for pipe jacking construction, and improving the convenience of disassembly and assembly.

[0032] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for preventing retreat of a pipe during pipe jacking construction, comprising a positioning box (1) and a pipe jacking track (6), characterized in that: A limited telescopic mechanism (2) is installed inside the positioning box body (1), and a stop plate (3) is fixedly connected to the top end of the limited telescopic mechanism (2); Stopping blocks (4) are fixedly mounted on the bottom surfaces of both sides of the stop plate (3); Positioning installation mechanisms (5) are symmetrically installed on both sides of the positioning box body (1), and a clamping groove (7) is provided on the inner side of the top pipe rail (6).

2. A device for preventing retreat of pipe jacking construction according to claim 1, characterized in that: The position limiting telescopic mechanism (2) comprises an outer sleeve (201) which is installed at equal intervals on the inner bottom surface of the positioning box body (1); the inner ring of the outer sleeve (201) is fittedly connected to the middle sleeve (202); the inner ring of the middle sleeve (202) is fittedly connected to the inner sleeve rod (203); the top end of the inner sleeve rod (203) is fixedly connected to the stop plate (3); the outer rings of the outer sleeve (201), the middle sleeve (202) and the inner sleeve rod (203) are sleeved with a telescopic spring (204); the upper and lower ends of the telescopic spring (204) are respectively fixedly connected to the stop plate (3) and the positioning box body (1).

3. A device for preventing retreat of pipeline jacking construction according to claim 2, characterized in that: The outer sleeve (201), the middle sleeve (202) and the inner sleeve rod (203) form a sliding telescopic structure, and the stop plate (3) is telescopically connected to the positioning box body (1) via a telescopic spring (204).

4. The anti-retraction device for pipeline jacking construction according to claim 1, characterized in that: The blocking blocks (4) are symmetrically distributed about the center line of the backstop plate (3), and the blocking blocks (4) are arranged in a trapezoidal structure.

5. The anti-retraction device for pipeline jacking construction according to claim 1, characterized in that: The positioning installation mechanism (5) includes a limit seat (501) symmetrically installed on both sides of the positioning box body (1), a movable rod (502) slidingly passes through the interior of the limit seat (501), a clamping block (503) is fixedly installed on one end of the movable rod (502), and a connecting plate (504) is fixedly sleeved on the other end of the movable rod (502), a limit rod (505) slidingly passes through one end of the connecting plate (504), one end of the limit rod (505) is fixedly connected to the limit seat (501), and the outer ring of the limit rod (505) is provided with a reset spring (506), and the two ends of the reset spring (506) are respectively connected to the limit rod (505) and the connecting plate (504).

6. The anti-retraction device for pipe jacking construction according to claim 5, characterized in that: The movable rod (502) is connected to the clamping slot (7) by means of a clamping block (503), and the connecting plate (504) forms a limiting telescopic structure with the limiting rod (505) through a return spring (506).

Images