An automatic anti-retraction device for rectangular jacking pipe with ratchet

Abstract

The present invention relates to the technical field of underground mechanical excavation construction, and specifically refers to an automatic rectangular jacking pipe anti-retraction device with ratchets, comprising an anti-retraction component and a fixing component, wherein the anti-retraction component is horizontally symmetrically arranged on both sides of a pipe segment along the length direction of the pipe segment, and is used to fix the pipe segment; the anti-retraction component comprises a working support and a ratchet, and a reserved groove matching the ratchet is arranged on the surface of the pipe segment; the fixing component is used to fix the anti-retraction component and provide a reaction force to prevent the jacking machine and the pipe segment from retreating, and the fixing component comprises a fixed support, a fixing bolt, a spring and a spring fixing device; the anti-retraction device realizes the technology of preventing the jacking machine and the pipe segment from retreating in the process of continuous jacking of the jacking machine and the pipe segment under the cooperation of the anti-retraction component, the fixing component and other devices. Compared with traditional anti-retraction measures, the device has a simple structure, a high degree of automation and a shorter time consumption. It can not only effectively solve the problem of stopping the retreat of the pipe segment and effectively control the surface settlement, but also make the jacking construction more continuous and effectively improve the efficiency of the jacking construction.

Description

Technical Field

[0001] The invention relates to the technical field of underground mechanical excavation construction, and in particular to an automatic anti-retraction device for rectangular jacking pipes with ratchets, which is particularly suitable for long-distance rectangular jacking pipe construction and building. Background Art

[0002] In recent years, the "green, safe, environmentally friendly and efficient" rectangular pipe jacking technology has gradually been widely used in the development of urban underground space because of its characteristics of avoiding ground traffic diversion and underground pipeline demolition, small disturbance to the soil during construction, little impact on the urban ground environment, effective control of surface subsidence, and high degree of mechanization. During the jacking process of this pipe jacking technology, the jack provides a jacking thrust to overcome the frontal water and soil pressure and lateral friction resistance on the pipe jacking machine and pipe segments. However, when installing the pipe segments, the jack cylinder retracts and the jacking thrust is removed. At this time, the lateral friction resistance is less than the frontal water and soil pressure of the pipe jacking machine, which will cause the pipe jacking machine and the jacked pipe segments to retreat, making the excavation surface soil unstable, thereby causing surface subsidence. In order to prevent surface subsidence caused by the retreat of the pipe jacking machine and pipe segments, it is usually necessary to set a pipe jacking stop device or take other measures.

[0003] By consulting the existing pipe jacking construction materials and related patents, there are currently two main measures to prevent pipe jacking from retreating. One is to set embedded steel connectors on the wall of the starting well. When the jack needs to be retracted, welding or rotating the related steel connectors are used to connect the pipe section to the wall of the starting well as a whole. This method requires constant disassembly and assembly, and the operation is complicated and time-consuming. The other is to set a special anti-retreat device, insert the anti-retreat pin into the reserved lifting hole of the pipe section, and fix it on the anti-retreat device to prevent the pipe section from retreating. This device will take up a certain amount of working space, require manual operation, have a low degree of automation, and low work efficiency. Summary of the invention

[0004] In order to solve the above problems, the present invention aims to disclose the technical field of underground mechanical excavation construction, and specifically refers to an automatic anti-retraction device for rectangular jacking pipes with ratchets.

[0005] To achieve the above object, the technical solution adopted by the present invention is: an automatic anti-retraction device for rectangular jacking pipe with ratchet, comprising a jacking machine, a cylinder frame, a jack cylinder, a jacking iron, a guide rail and a plurality of pipe sections, the automatic anti-retraction device comprises an anti-retraction component and a fixing component, the anti-retraction component is horizontally symmetrically arranged on both sides of the pipe section along the length direction of the pipe section, and is used to fix the pipe section;

[0006] The anti-retraction component includes an integrally formed working support and a ratchet, the surface of the pipe section is provided with a reserved groove matching the ratchet, and the ratchet is connected to the reserved groove by a sliding fit; the fixing component is used to fix the anti-retraction component and provide a reaction force to prevent the pipe jacking machine and the pipe section from retreating, and the fixing component includes a fixing support, a fixing bolt, a spring and a spring fixing device;

[0007] The tail of the working support is configured as a toothed structure, and the tail of the working support is connected to the fixed support in a toothed manner, and a reserved hole for inserting the fixing bolt is provided between the teeth; the pawl is used as the main force-bearing component, and its structure is configured as a wedge block, including a front face of the wedge block and a back face of the wedge block, the front face of the wedge block is a plane, and the back face of the wedge block is a wedge surface, wherein a lubricating layer is provided on the surface of the wedge surface;

[0008] The fixed support is the main load-bearing component, and a fixing bolt is provided on its front side, and a back side is fixed to the side wall of the starting well. The fixing bolt is arranged at the tail of the working support of the anti-recession component to restrict the displacement of the anti-recession component in the vertical and horizontal directions. The anti-recession component rotates horizontally around the fixing bolt. The spring is connected between the fixed support and the working support to limit the rotational stroke of the anti-recession component relative to the fixed component. Spring fixing devices are respectively provided at both ends of the spring to be fixedly connected to the fixed support and the working support.

[0009] Preferably, the anti-retraction device is arranged at the lower half of the pipe section, and at least one group of anti-retraction devices is arranged.

[0010] Preferably, the retaining member is provided with at least one pawl.

[0011] Preferably, the retreat-stopping component includes a working support and three pawls.

[0012] Preferably, the anti-retreat device includes an anti-retreat state and a non-retreat state. When the anti-retreat device is in the anti-retreat state, the pawl slides into the reserved groove on the surface of the pipe joint; when the anti-retreat device is in the non-retreat state, the pawl slides out of the reserved groove and, under the tension of the spring, clings to the outer wall of the pipe joint, and the pipe joint moves horizontally relative to the anti-retreat device.

[0013] Preferably, the spring is arranged on a side of the fixed support and the working support close to the pipe section.

[0014] Preferably, the reserved groove is arranged in a wedge shape, wherein the side close to the side wall of the starting well is the front side, which is a planar structure, and the back side is a wedge side. The surface of the reserved groove is provided with a reserved groove steel plate matching the shape of the reserved groove, and the surface of the reserved groove steel plate is provided with a lubricating layer.

[0015] Preferably, the cross-section of the reserved groove is trapezoidal, with its long side set to 100 mm and its short side set to 50 mm, the width of the reserved groove is set to 100 mm, the depth is set to 60 mm, the spacing between each reserved groove is set to 50 mm, and the reserved groove steel plate is 5 mm thick.

[0016] The beneficial effects of the present invention are embodied in: the present invention is an automatic rectangular jacking pipe anti-retreat device with a pawl. The anti-retreat device adopts a pawl, a working support, a spring, a fixed support and other devices to cooperate to complete the pipe section anti-retreat process. Compared with the traditional anti-retreat device using a fixed pin, the advantage is that the device has a simple structure, does not occupy the working space, does not require manual operation, has a high degree of automation, consumes less time, and has more continuous construction. It can not only effectively solve the problem of retreat of the jacking machine and the pipe section, and effectively control the surface settlement, but also make the jacking construction more continuous and effectively improve the efficiency of the jacking construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a cross-sectional view of an automatic anti-retraction device for a rectangular jacking pipe with a ratchet according to an embodiment of the present invention.

[0018] Figure 2 The present invention is a cross-sectional view of an automatic anti-retraction device for a rectangular jacking pipe with a ratchet according to an embodiment of the present invention.

[0019] Figure 3 It is a partial plan view of an automatic anti-retraction device for a rectangular jacking pipe with a ratchet in the anti-retraction state according to an embodiment of the present invention.

[0020] Figure 4 It is a partial plan view of an automatic stop-retraction device for a rectangular jacking pipe with a ratchet in a non-stop-retraction state according to an embodiment of the present invention.

[0021] Figure 5 The present invention is a partial cross-sectional view of an automatic stop-retraction device for a rectangular jacking pipe with a ratchet in a non-stop-retraction state according to an embodiment of the present invention.

[0022] Figure 6 The present invention is a structural plan view of an automatic anti-retraction device for a rectangular jacking pipe with a ratchet according to an embodiment of the present invention.

[0023] Figure 7 The present invention is a cross-sectional view of the structure of an automatic anti-retraction device for a rectangular jacking pipe with a ratchet according to an embodiment of the present invention.

[0024] Figure 8 The present invention is a plan view of a pipe joint reserved groove of an automatic anti-retraction device for rectangular jacking pipe with a ratchet according to an embodiment of the present invention.

[0025] Fig. 9 The present invention is a cross-sectional view of a pipe joint reserved groove of an automatic anti-retraction device for rectangular jacking pipes with a ratchet in accordance with an embodiment of the present invention.

[0026] Fig.10 This is a structural elevation view of an automatic anti-retraction device for a rectangular jacking pipe with a ratchet according to an embodiment of the present invention.

[0027] Notes on the attached drawings:

[0028] 1-pipe jacking machine, 2-pipe section, 3-stop device, 4-side wall of the starting well, 5-jacking iron, 6-jack cylinder, 7-cylinder frame, 8-guide rail, 9-reserved groove, 21-N-1th pipe section, 22-Nth pipe section, 23-N+1th pipe section, 24-N+2th pipe section, 31-stop component, 32-fixing component, 229-Nth pipe section reserved groove, 239-N+1th pipe section reserved groove, 311-working support, 312-ratchet, 321-fixed support, 322-fixing bolt, 323-spring, 324-spring fixing device, 91-reserved groove steel plate, 92-anchor bar. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings:

[0030] The present invention proposes an automatic anti-retraction device 3 for rectangular jacking pipes with a ratchet 312, comprising a jacking machine 1, a cylinder frame 7, a jack cylinder 6, a jacking iron 5, a guide rail 8 and a multi-section pipe segment 2, wherein the automatic anti-retraction device 3 comprises an anti-retraction component 31 and a fixing component 32, wherein the anti-retraction component 31 is horizontally symmetrically arranged on both sides of the pipe segment 2 along the length direction of the pipe segment 2 for fixing the pipe segment 2, and in this embodiment, the anti-retraction device 3 is arranged at the lower half of the pipe segment 2, and the number of the anti-retraction device 3 is at least one group; the anti-retraction device 3 for jacking pipes realizes the technology of anti-retraction of the jacking machine 1 and the pipe segment 2 under the cooperation of the anti-retraction component 31, the fixing component 32 and other devices during the continuous jacking process of the jacking machine 1 and the pipe segment 2;

[0031] The anti-retraction component 31 includes an integrally formed working support 311 and a ratchet 312. The surface of the pipe section 2 is provided with a reserved groove 9 matching the ratchet 312. The ratchet 312 is connected to the reserved groove 9 by sliding fit. The fixing component 32 is used to fix the anti-retraction component 31 and provide a reaction force to prevent the pipe jacking machine 1 and the pipe section 2 from retreating. The fixing component 32 includes a fixing support 321, a fixing bolt 322, a spring 323 and a spring fixing device 324.

[0032] The working support 311 is a force transmission component, and the ratchet 312 is a main force bearing component, and its structure is set as a wedge block, preferably a wedge-shaped steel component, including a front face of the wedge block and a back face of the wedge block. The front face of the wedge block is a plane, a force bearing surface, and is arranged close to the tunnel door side, and the back face of the wedge block is a wedge surface, a sliding surface, and is arranged away from the tunnel door side, wherein a lubricating layer is arranged on the surface of the wedge surface;

[0033] The fixed support 321 is the main load-bearing member, with a fixing bolt 322 on the front and fixed on the side wall 4 of the starting well on the back. The fixed support 321 should be easy to disassemble and assemble, and should be able to bear sufficient load.

[0034] The fixing bolt 322 is arranged at the tail of the working support 311 of the stop member 31 to restrict the displacement of the stop member 31 in the vertical and horizontal directions. The stop member 31 rotates horizontally around the fixing bolt 322. The spring 323 is connected between the fixed support 321 and the working support 311 to limit the rotation stroke of the stop member 31 relative to the fixed member 32. Both ends of the spring 323 are respectively provided with spring fixing devices 324 that are fixedly connected to the fixed support 321 and the working support 311.

[0035] The anti-retraction component 31 is provided with at least one pawl 312. To ensure the working stability of the anti-retraction component 31, in this embodiment, the anti-retraction component 31 includes a working support 311 and three pawls 312. The pawl 312 and the working support 311 are cut from a whole steel plate. The tail of the working support 311 is set as a tooth structure and a socket is reserved. The tail of the working support 311 and the fixed support 321 are connected in a toothed manner, and a reserved hole for inserting the fixing bolt 322 is provided between the teeth.

[0036] The anti-retraction device 3 includes an anti-retraction state and a non-anti-retraction state. When the anti-retraction device 3 is in the anti-retraction state, the pawl 312 slides into the reserved groove 9 on the surface of the pipe section 2; when the anti-retraction device 3 is in the non-anti-retraction state, the pawl slides out of the reserved groove 9 and clings to the outer wall of the pipe section 2 under the tension of the spring 323, and the pipe section 2 moves horizontally relative to the anti-retraction device 3.

[0037] The spring 323 is arranged on a side of the fixed support 321 and the working support 311 close to the pipe section 2, and should have a sufficient elastic coefficient, and the spring 323 should be in a tension state when the stop device 3 is in the stop state and the non-stop state;

[0038] When the stop device 3 is converted from the non-stop state to the stop state, that is, when the reserved groove 9 moves forward with the pipe section 2 to the vicinity of the pawl 312, the pawl 312 naturally slides into the reserved groove 9 and is tightly clamped in the reserved groove 9 under the action of the spring 323; when the stop device 3 is converted from the stop state to the non-stop state, that is, under the thrust of the jack cylinder 6, the pipe section 2 moves forward, the pawl 312 will slide out of the reserved groove 9 and continue to be tightly attached to the outer wall of the pipe section 2 under the action of the spring 323;

[0039] like Figure 8-10As shown, the position and number of the reserved grooves 9 should correspond to the pawls 312, and should avoid the main reinforcement position of the pipe segment 2, while leaving enough protective layer thickness for the reinforcement; the reserved groove 9 is set in a wedge shape, and the side close to the side wall 4 of the starting well is the front side, which is a plane structure, and the back side is a wedge surface, and the wedge angle of the wedge surface is set to ensure that the pawl 312 can slide out naturally when the pipe segment 2 is subjected to a top thrust. The surface of the reserved groove 9 is provided with a reserved groove steel plate 91 matching the shape of the reserved groove 9, and the surface of the reserved groove steel plate 91 is provided with a lubricating layer. In order to ensure that the pawl 312 slides out smoothly, the size of the reserved groove 9 should be set to be slightly larger than the pawl 312;

[0040] In this embodiment, the cross-section of the reserved groove 9 is a trapezoid, the long side is set to 100 mm, the short side is set to 50 mm, the width of the reserved groove 9 is set to 100 mm, the depth is set to 60 mm, the spacing between each reserved groove 9 is set to 50 mm, and the reserved groove steel plate 91 is 5 mm thick;

[0041] Specifically, in order to make the working process of the anti-retraction device 3 more clear, Figure 3-5 As shown, the pipe section 2 includes the N-1 pipe section 21, the N-1 pipe section 22, the N+1 pipe section 23 and the N+2 pipe section 24, and the reserved groove 9 includes the N-1 pipe section reserved groove 229 and the N+1 pipe section reserved groove 239 respectively arranged on the N-1 pipe section 22 and the N+1 pipe section 23. Before the N+1 pipe section 23 is installed, the jack cylinder 6 is pushed forward, and the stop device 3 is fixed on the side wall 4 of the starting well. Under the action of the top thrust of the N+1 pipe section 23, the N+1 pipe section reserved groove 239 moves forward with the N+1 pipe section 23 to the thorn The claw 312 naturally slides into the reserved groove 239 of the N+1th pipe section, and then the cylinder retracts. At this time, the anti-retraction component 31 is in the anti-retraction state and plays a anti-retraction role; when the N+1th pipe section 23 is installed and starts to be pushed forward, the jack cylinder 6 pushes forward to gradually apply a pushing force to the jacking machine 1 and the pipe section 2. At this time, the pawl 312 slides out of the reserved groove 239 of the N+1th pipe section, and continues to be close to the outer wall of the pipe section 2 under the action of the spring 323, and moves relative to it. At this time, the anti-retraction component 31 is in the non-anti-retraction state, and when the subsequent pipe section 2 is installed and pushed forward, the above-mentioned work process can be repeated.

[0042] The above are only preferred embodiments of the present invention and do not limit the technical scope of the present invention. Technical personnel in this industry can make some deformation and modifications under the inspiration of this technical solution. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A rectangular pipe jacking automatic stop device with a ratchet, comprising a pipe jacking machine, a cylinder frame, a jack cylinder, a jacking iron, a guide rail and multiple pipe sections, It is characterized in that The automatic anti-retraction device comprises an anti-retraction component and a fixing component, wherein the anti-retraction component is horizontally symmetrically arranged on both sides of the pipe section along the length direction of the pipe section and is used to fix the pipe section; The anti-retraction component includes an integrally formed working support and a ratchet, the surface of the pipe section is provided with a reserved groove matching the ratchet, and the ratchet is connected to the reserved groove by a sliding fit; the fixing component is used to fix the anti-retraction component and provide a reaction force to prevent the pipe jacking machine and the pipe section from retreating, and the fixing component includes a fixing support, a fixing bolt, a spring and a spring fixing device; The tail of the working support is configured as a toothed structure, and the tail of the working support is connected to the fixed support in a toothed manner, and a reserved hole for inserting the fixing bolt is provided between the teeth; the pawl is used as the main force-bearing component, and its structure is configured as a wedge block, including a front face of the wedge block and a back face of the wedge block, the front face of the wedge block is a plane, and the back face of the wedge block is a wedge surface, wherein a lubricating layer is provided on the surface of the wedge surface; The fixed support is the main load-bearing component, and a fixing bolt is provided on its front side, and a back side is fixed to the side wall of the starting well. The fixing bolt is arranged at the tail of the working support of the anti-recession component to restrict the displacement of the anti-recession component in the vertical and horizontal directions. The anti-recession component rotates horizontally around the fixing bolt. The spring is connected between the fixed support and the working support to limit the rotational stroke of the anti-recession component relative to the fixed component. Spring fixing devices are respectively provided at both ends of the spring to be fixedly connected to the fixed support and the working support.

2. The rectangular jacking pipe automatic stop device with a ratchet according to claim 1, It is characterized in that The anti-retraction device is arranged at the lower half of the pipe section, and at least one group of anti-retraction devices is arranged.

3. The automatic anti-retraction device for rectangular jacking pipe with ratchet according to claim 1, It is characterized in that The stop member is provided with at least one pawl.

4. An automatic anti-retraction device for rectangular jacking pipe with ratchet according to claim 1 or 3, It is characterized in that The anti-retraction component includes a working support and three pawls.

5. The automatic anti-retraction device for rectangular jacking pipe with ratchet according to claim 1, It is characterized in that The anti-retreat device includes an anti-retreat state and a non-retreat state. When the anti-retreat device is in the anti-retreat state, the pawl slides into a reserved groove on the surface of the pipe segment; when the anti-retreat device is in the non-retreat state, the pawl slides out of the reserved groove and, under the tension of the spring, clings to the outer wall of the pipe segment, and the pipe segment moves horizontally relative to the anti-retreat device.

6. The rectangular jacking pipe automatic stop device with ratchet according to claim 5, It is characterized in that The spring is arranged on a side surface of the fixed support and the working support close to the pipe section.

7. The automatic anti-retraction device for rectangular jacking pipe with ratchet according to claim 6, It is characterized in that The reserved groove is set in a wedge shape, and the side close to the side wall of the starting well is the front side, which is a flat structure, and the back side is a wedge surface. The surface of the reserved groove is provided with a reserved groove steel plate matching the shape of the reserved groove, and the surface of the reserved groove steel plate is provided with a lubricating layer.

8. The rectangular jacking pipe automatic stop device with ratchet according to claim 7, It is characterized in that The cross-section of the reserved groove is trapezoidal, with its long side set to 100mm and its short side set to 50mm. The width of the reserved groove is set to 100mm and its depth is set to 60mm. The spacing between each reserved groove is set to 50mm, and the reserved groove steel plate is 5mm thick.

Images