Large-diameter jacking pipe retaining device convenient to operate

Abstract

The utility model provides a large-diameter jacking pipe retaining device convenient to operate. Belongs to the technical field of pipe-jacking construction. According to the technical scheme, the device comprises a pipe joint located at a working well opening, triangular supports located on the two sides of the pipe joint are fixed to the working well opening, a retaining pin matched with a hoisting hole movably penetrates through the near end of the upper end of each triangular support in the horizontal direction, and a retaining block is fixedly connected to the end, away from the hoisting hole, of each retaining pin; the bottom of the retaining block is fixedly connected with a linkage rod which is arranged in the vertical direction, the lower end of the linkage rod is fixedly connected with a connecting block, the connecting block is fixedly connected with a connecting pin which movably penetrates through the tripod in the horizontal direction, the connecting pin is parallel to the retaining pin, and the tail end of the connecting pin is detachably connected with a limiting block; the large-diameter jacking pipe retaining device is simple in structure and reasonable in design, a user does not need to climb to a high position with the help of a ladder stand when retaining a pipe joint, time and labor are saved, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking construction, in particular to a large-diameter pipe jacking retreat prevention device which is easy to operate. Background Art

[0002] During the pipe jacking construction process, if there is a large obstacle in front of the machine head, or the pipe jacking equipment fails and the jacking construction cannot continue, it is necessary to retract the machine head and the pipe section that has been pushed in, and return the machine head and the pipe section to the starting well position. Two days before the pipe section is officially pulled out, thixotropic mud is injected through the grouting hole of the pipe section to prevent the pipe section from locking. When officially pulling out, the four jacks ensure synchronous operation. When the first section is pulled out, the jacking force of each jack is controlled at 2000KN, and it is pulled out slowly, and the pulling out speed is controlled at 1cm / min; at the same time, observe the ground conditions directly above the corresponding part to see if there are any subsidence, cracks, etc.; grouting must be carried out synchronously during the pulling process, and the first pulling out should be controlled within 20cm, stop immediately, and check the ground grouting conditions. After normal, each pulling out should stop within 50cm, and check the ground settlement and grouting conditions (take cores from the ground more than 4 hours after grouting to check the formation strength and grouting density). In order to prevent the risk of the pipe section continuing to retreat after the jack stops due to excessive soil pressure in front, an on-site stop frame can be used to control the single withdrawal distance.

[0003] The existing anti-recoil frames generally use lifting pins to insert into the lifting holes on both sides of the pipe joint to prevent the pipe joint from retreating. However, it is found during use that since the lifting holes on the pipe joints are far from the ground in the working pit, the existing anti-recoil frames are generally high. When inserting the pins into the lifting holes, it is necessary to use a ladder to climb to the height of the anti-recoil frame and then insert the pins on the anti-recoil frame into the lifting holes, which is time-consuming and laborious. Utility Model Content

[0004] The utility model aims to provide a large-diameter jacking pipe anti-retraction device which is easy to operate, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A large-diameter jacking pipe stop device that is easy to operate, comprising a pipe section located at the opening of a working well, hoisting holes are reserved symmetrically on both sides of the pipe section along the axial direction, tripods are fixed at the opening of the working well and located on both sides of the pipe section, stop pins that are adapted to the hoisting holes are movably penetrated in the horizontal direction at the upper proximal end of each tripod, and a stop block is fixedly connected to the end of each stop pin that is away from the hoisting hole;

[0007] A linkage rod arranged in the vertical direction is fixedly connected to the bottom of the stop block, and a connecting block is fixedly connected to the lower end of the linkage rod. A connecting pin that moves through the tripod in the horizontal direction is fixedly connected to the connecting block. The connecting pin is parallel to the stop pin, and a limit block is detachably connected at the end of the connecting pin.

[0008] As a further solution of the utility model: the tripod includes a supporting channel steel arranged in the vertical direction, the stop pin and the connecting pin both move through the supporting channel steel in the horizontal direction, a strip fixing plate arranged in the horizontal direction is fixedly connected to the lower end of the supporting channel steel, a number of fixing holes are evenly distributed on the strip fixing plate, and a diagonal support channel steel is fixedly connected between the supporting channel steel and the strip fixing plate.

[0009] As a further solution of the utility model: a first sleeve matched with the retaining pin is fixedly connected to the tripod, the retaining pin moves through the first sleeve along the horizontal direction, and a plurality of first stiffening plates are fixedly connected at circumferential intervals between the outer ring of the first sleeve and the tripod.

[0010] As a further solution of the utility model: a second sleeve matched with the connecting pin is fixedly connected to the tripod, the connecting pin moves through the second sleeve in the horizontal direction, and a plurality of second stiffening plates are fixedly connected at circumferential intervals between the outer ring of the second sleeve and the tripod.

[0011] As a further solution of the utility model: a limiting bolt is movably provided on the second sleeve in the vertical direction, and a first limiting hole and a second limiting hole adapted to the limiting bolt are provided at intervals in the horizontal direction on the connecting pin;

[0012] When the limiting bolt passes through the second sleeve and the first limiting hole, the end of the retaining pin is inserted into the lifting hole; when the limiting bolt passes through the second sleeve and the second limiting hole, the end of the retaining pin is located outside the lifting hole.

[0013] As a further solution of the utility model: the end of the connecting pin is fixedly connected with a screw rod which moves horizontally through the limit block, and the end of the screw rod is threadedly connected with a nut; the limit block is detachably connected to the connecting pin through the cooperation of the screw rod and the nut.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] After the utility model adopts the above structure, through the mutual cooperation between the stop pin, the stop block, the linkage rod, the connecting block and the connecting pin, when the pipe section needs to be stopped, the staff stands on the ground of the working well, and then holds the linkage rod to drive the stop block and the stop pin to move horizontally, so that the stop pin is inserted into the lifting hole to stop the pipe section, and prevent the pipe section from instantly withdrawing from the tunnel and causing ground collapse; in the process of horizontal movement of the stop pin, the connecting pin moves synchronously with the stop pin, so that the moving distance of the stop pin can be limited by the cooperation of the connecting pin, the limit block and the connecting block, and the stop pin is prevented from over-displacement. The utility model has a simple structure and a reasonable design. When stopping the retreat of the pipe section, there is no need to climb to a high place with the help of a ladder, which saves time and effort and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.

[0017] Figure 1 The present invention is a structural schematic diagram of a large-diameter jacking pipe anti-retraction device which is easy to operate.

[0018] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0019] Figure 3 for Figure 1 A local enlarged schematic diagram of point B in the middle.

[0020] Figure 4 The present invention is a schematic diagram of the structure of a tripod in a large-diameter jacking pipe anti-retraction device which is easy to operate.

[0021] In the figure: 1. pipe joint; 2. lifting hole; 3. tripod; 301. supporting channel steel; 302. fixing plate; 303. fixing hole; 304. diagonal bracing channel steel; 4. stop pin; 5. stop block; 6. linkage rod; 7. connecting block; 8. connecting pin; 9. limit block; 10. first sleeve; 11. first stiffened plate; 12. second sleeve; 13. second stiffened plate; 14. limit bolt; 15. first limit hole; 16. second limit hole; 17. screw; 18. nut. DETAILED DESCRIPTION

[0022] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0023] See also Figure 1-4A large-diameter jacking pipe stopping device that is easy to operate comprises a pipe segment 1 located at the opening of a working well, and hoisting holes 2 are reserved symmetrically on both sides of the pipe segment 1 along the axial direction. During the jacking pipe construction process, the pipe segment 1 can be hoisted to a designated position through the cooperation of an external hoisting device and the hoisting holes 2; tripods 3 located on both sides of the pipe segment 1 are fixed at the opening of the working well, and a stop pin 4 adapted to the hoisting hole 2 is movably penetrated in the horizontal direction at the upper proximal end of each tripod 3, and a stop block 5 is fixedly connected to one end of each stop pin 4 away from the hoisting hole 2; when the pipe segment 1 needs to be stopped, the stop pin 4 is inserted into the hoisting holes 2 on both sides of the pipe segment 1, so that the pipe segment 1 cannot move. A linkage rod 6 arranged in the vertical direction is fixedly connected to the bottom of the stop block 5, and the movement of the stop pin 4 can be controlled by the linkage rod 6, so that the staff does not need to climb to a high place; a connecting block 7 is fixedly connected to the lower end of the linkage rod 6, and a connecting pin 8 is fixedly connected to the connecting block 7, which is movable through the tripod 3 in the horizontal direction. The connecting pin 8 is parallel to the stop pin 4, and a limit block 9 is detachably connected to the end of the connecting pin 8. Through the cooperation of the connecting block 7, the connecting pin 8 and the limit block 9, the stop pin 4 can be prevented from over-displacement, which is convenient for use.

[0024] The tripod 3 includes a support channel steel 301 arranged in the vertical direction, the stop pin 4 and the connecting pin 8 are both movable through the support channel steel 301 in the horizontal direction, a bar fixing plate 302 arranged in the horizontal direction is fixedly connected to the lower end of the support channel steel 301, and a plurality of fixing holes 303 are evenly distributed on the bar fixing plate 302, and the bar fixing plate 302 can be fixed to the ground of the working well by the cooperation of the external bolts and the fixing holes 303; a diagonal brace channel steel 304 is fixedly connected between the support channel steel 301 and the bar fixing plate 302. The support channel steel 301, the bar fixing plate 302 and the diagonal brace channel steel 304 cooperate to form a triangular structure, which is stable, so that the pipe segment 1 can be stopped from retreating stably, and the tripod 3 is welded with channel steel, which is simple in material and convenient for assembly and modification at the construction site.

[0025] Furthermore, the tripod 3 is fixedly connected with a first sleeve 10 adapted to the stop pin 4, the stop pin 4 moves through the first sleeve 10 in the horizontal direction, and a plurality of first stiffening plates 11 are fixedly connected at intervals in the circumferential direction between the outer ring of the first sleeve 10 and the tripod 3 to enhance the stability of the structure and prevent the stop pin 4 from directly contacting the tripod 3 and being affected by the force, thereby causing damage to the corresponding holes on the tripod 3. Similarly, the tripod 3 is fixedly connected with a second sleeve 12 adapted to the connecting pin 8, the connecting pin 8 moves through the second sleeve 12 in the horizontal direction, and a plurality of second stiffening plates 13 are fixedly connected at intervals in the circumferential direction between the outer ring of the second sleeve 12 and the tripod 3 to enhance the stability of the structure.

[0026] Preferably, a limiting bolt 14 is movably provided on the second sleeve 12 in the vertical direction, and a first limiting hole 15 and a second limiting hole 16 adapted to the limiting bolt 14 are provided on the connecting pin 8 in the horizontal direction at intervals; when the limiting bolt 14 passes through the second sleeve 12 and the first limiting hole 15, the end of the stop pin 4 is inserted into the hanging hole 2; when the limiting bolt 14 passes through the second sleeve 12 and the second limiting hole 16, the end of the stop pin 4 is located outside the hanging hole 2, and the position of the stop pin 4 can be positioned and fixed by the cooperation of the limiting bolt 14, the first limiting hole 15 and the second limiting hole 16, so that the stop pin 4 is not easily separated from the hanging hole 2, thereby ensuring the stability of the stop. Under normal conditions, the stop pin 4 can be fixed in the first sleeve 10, so as not to affect the normal withdrawal of the pipe section 1.

[0027] In addition, the end of the connecting pin 8 is fixedly connected with a screw rod 17 which moves horizontally through the limit block 9, and a nut 18 is threadedly connected to the end of the screw rod 17; the limit block 9 is detachably connected to the connecting pin 8 through the cooperation of the screw rod 17 and the nut 18. When the nut 18 is removed, the limit block 9 can be separated from the screw rod 17, so that the connecting pin 8 can be pulled out from the second sleeve 12, and the stop pin 4 can be pulled out from the first sleeve 10 at the same time. The structure is simple and convenient for disassembly, assembly and replacement of various components.

[0028] When in use, the two tripods 3 are fixed in the working well and located on both sides of the pipe section 1. When the pipe section 1 needs to be stopped, the limit bolt 14 is first pulled out, and then the staff holds the linkage rod 6 to drive the stop pin 4 and the connecting pin 8 to move synchronously to the inside of the tripod 3, so that the stop pin 4 is inserted into the lifting hole 2, and then the limit bolt 14 is passed through the second sleeve 12 and the first limit hole 15, so that the position of the connecting pin 8 can be fixed, thereby fixing the position of the stop pin 4, so that the stop pin 4 is not easily detached from the lifting hole 2, thereby ensuring the stability of the stop.

[0029] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the explanation of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the relevant technical field, if they do not depart from the scope of the technical features of the present invention, can make equivalent embodiments by partial changes or modifications to the technical contents disclosed in the present invention, and they still fall within the scope of the technical features of the present invention without departing from the technical features of the present invention.

Claims

1. A large-diameter pipe jacking stop device that is easy to operate, comprising a pipe section (1) located at the opening of a working well, characterized in that: The two sides of the pipe section (1) are symmetrically reserved with hanging holes (2) along the axial direction, and tripods (3) are fixed at the opening of the working well and located on both sides of the pipe section (1). A stop pin (4) adapted to the hanging hole (2) is movably penetrated in the horizontal direction at the proximal end of the upper end of each tripod (3), and a stop block (5) is fixedly connected to the end of each stop pin (4) away from the hanging hole (2); A linkage rod (6) arranged in the vertical direction is fixedly connected to the bottom of the stop block (5), a connection block (7) is fixedly connected to the lower end of the linkage rod (6), a connection pin (8) which is movable through the tripod (3) in the horizontal direction is fixedly connected to the connection block (7), the connection pin (8) is parallel to the stop pin (4), and a limit block (9) is detachably connected to the end of the connection pin (8).

2. The easy-to-operate large-diameter jacking pipe stopping device according to claim 1, characterized in that: The tripod (3) comprises a supporting channel steel (301) arranged in a vertical direction, the stop pin (4) and the connecting pin (8) are both movable through the supporting channel steel (301) in a horizontal direction, a strip fixing plate (302) arranged in a horizontal direction is fixedly connected to the lower end of the supporting channel steel (301), a plurality of fixing holes (303) are evenly distributed on the strip fixing plate (302), and a diagonal bracing channel steel (304) is fixedly connected between the supporting channel steel (301) and the strip fixing plate (302).

3. The easy-to-operate large-diameter jacking pipe stopping device according to claim 1, characterized in that: A first sleeve (10) adapted to the stop pin (4) is fixedly connected to the tripod (3); the stop pin (4) moves through the first sleeve (10) in a horizontal direction; and a plurality of first stiffening plates (11) are fixedly connected at intervals along the circumferential direction between the outer ring of the first sleeve (10) and the tripod (3).

4. The easy-to-operate large-diameter jacking pipe stopping device according to claim 1, characterized in that: A second sleeve (12) matched with the connecting pin (8) is fixedly connected to the tripod (3); the connecting pin (8) moves through the second sleeve (12) in a horizontal direction; and a plurality of second stiffening plates (13) are fixedly connected at intervals along the circumferential direction between the outer ring of the second sleeve (12) and the tripod (3).

5. The easy-to-operate large-diameter jacking pipe stopping device according to claim 4, characterized in that: A limiting bolt (14) is movably provided on the second sleeve (12) in the vertical direction, and a first limiting hole (15) and a second limiting hole (16) adapted to the limiting bolt (14) are provided at intervals in the horizontal direction on the connecting pin (8); When the limiting bolt (14) passes through the second sleeve (12) and the first limiting hole (15), the end of the stop pin (4) is inserted into the hanging hole (2); when the limiting bolt (14) passes through the second sleeve (12) and the second limiting hole (16), the end of the stop pin (4) is located outside the hanging hole (2).

6. The easy-to-operate large-diameter jacking pipe stopping device according to claim 1, characterized in that: The end of the connecting pin (8) is fixedly connected to a screw rod (17) which moves through the limit block (9) in a horizontal direction, and a nut (18) is threadedly connected to the end of the screw rod (17); the limit block (9) is detachably connected to the connecting pin (8) through the cooperation of the screw rod (17) and the nut (18).

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