CN215169988U

CN215169988U - Automatic stopping device of rectangle push pipe with pawl

Info

Publication number: CN215169988U
Application number: CN202120800727.3U
Authority: CN
Inventors: 周丽红; 陈雪华; 谢玉芳; 姚宪平; 王和川; 崔杰平; 戢鸿鑫
Original assignee: Guangzhou Golden Earth Geotechnical Engineering Technology Co ltd; Shanghai Civil Engineering Co Ltd of CREC
Current assignee: Guangzhou Golden Earth Geotechnical Engineering Technology Co ltd; Shanghai Civil Engineering Co Ltd of CREC
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-12-14
Anticipated expiration: 2031-04-19

Abstract

The utility model relates to the technical field of underground mechanical method underground excavation construction, in particular to a rectangular pipe-jacking automatic stopping device with a pawl, which comprises a stopping component and a fixing component, wherein the stopping component is horizontally and symmetrically arranged on two sides of a pipe joint along the length direction of the pipe joint and used for fixing the pipe joint; the stopping component comprises a working support and a pawl, and a reserved groove matched with the pawl is formed in the surface of the pipe joint; the fixing part is used for fixing the retaining part and providing counter force for preventing the push bench and the pipe joint from returning, and comprises a fixing support, a fixing bolt, a spring and a spring fixing device; the stopping device realizes the technology of pipe pushing jack and pipe joint stopping under the cooperation of devices such as stopping part, fixed part at the in-process that pipe pushing jack and pipe joint constantly pushed forward, compares with traditional stopping measure, the device simple structure, and degree of automation is high, consuming time shorter, can not only effectively solve the pipe joint stopping, and the effective control earth's surface subsides, and can make the construction of pushing forward have more the continuity and effectively improve pipe-jacking efficiency of construction.

Description

Automatic stopping device of rectangle push pipe with pawl

Technical Field

The utility model relates to an underground mechanical method secretly digs and builds technical field, concretely relates to automatic stopping device of rectangle push pipe with pawl especially is suitable for long distance rectangle push pipe construction and builds.

Background

In recent years, the 'green, safe, environment-friendly and efficient' rectangular pipe jacking technology has the advantages of avoiding ground traffic improvement and underground pipeline removal, causing little disturbance to soil bodies and little influence to urban ground environment during construction, can effectively control the surface subsidence, has the characteristics of high mechanization degree and the like, is gradually widely applied to the development of urban underground space, in the jacking process of the pipe jacking technology, a jack provides jacking force to overcome the front water and soil pressure and side frictional resistance borne by a pipe jacking machine and a pipe joint, but when the pipe joints are installed, the jack cylinder retracts, the jacking force can be removed, at the moment, the side frictional resistance is smaller than the water and soil pressure on the front side of the pipe pushing machine, the pipe pushing machine and the pushed pipe joints can be retracted, the soil body on the excavated surface is unstable, therefore, the ground surface subsidence is caused, and in order to prevent the ground surface subsidence caused by the withdrawal of the pipe jacking machine and the pipe joints, a pipe jacking stopping device is usually required to be arranged or other measures are taken.

Looking up the existing pipe-jacking construction data and related patents, the current measures for preventing pipe-jacking from returning are mainly two, one is to arrange a pre-embedded steel connecting piece on the wall of an originating well, and when a jack needs to be retracted, the related steel connecting piece is welded or rotated to connect a pipe joint and the wall of the originating well into a whole, so that the method needs to be continuously disassembled and assembled, and is complex in operation and more in time consumption; another kind is for setting up special stopping device, inserts the tube coupling with the stopping round pin and reserves the hole for hoist to be fixed in on the stopping equipment and can prevent that the tube coupling from returning, the device can occupy certain workspace, needs manual operation, and degree of automation is low, and work efficiency is lower.

Disclosure of Invention

In order to solve the problem, the utility model discloses a technical field is built to underground mechanical method undercut, specifically indicates an automatic stopping device of rectangle push pipe with pawl.

In order to achieve the above object, the utility model adopts the following technical scheme: the rectangular pipe jacking automatic retaining device with the pawl comprises a pipe jacking machine, an oil cylinder frame, a jack oil cylinder, a jacking iron, a guide rail and a plurality of sections of pipe joints, wherein the automatic retaining device comprises retaining parts and fixing parts, and the retaining parts are horizontally and symmetrically arranged on two sides of each pipe joint along the length direction of the pipe joint and used for fixing the pipe joints; the anti-return component comprises a working support and a pawl which are integrally formed, a reserved groove matched with the pawl is formed in the surface of the pipe joint, and the pawl is connected with the reserved groove in a sliding fit mode;

the fixing part is used for fixing the retaining part and providing counter force for preventing the push bench and the pipe joint from returning, and comprises a fixing support, a fixing bolt, a spring and a spring fixing device;

the fixed support is a main bearing component, a fixed bolt is arranged on the front surface of the fixed support, the back surface of the fixed support is fixed on the side wall of the well wall of the starting well, the fixed bolt is arranged at the tail part of the working support of the stopping component and used for restraining the displacement of the stopping component in the vertical direction and the horizontal direction, the stopping component horizontally rotates around the fixed bolt, the spring is connected between the fixed support and the working support so as to limit the rotating stroke of the stopping component relative to the fixed component, and spring fixing devices are respectively arranged at two ends of the spring and fixedly connected with the fixed support and the working support.

Preferably, the retaining devices are arranged on the lower half part of the pipe joint, and at least one group of retaining devices is arranged.

Preferably, the backstop member is provided with at least one pawl.

Preferably, the retaining member comprises a working support and three pawls.

Preferably, the tail part of the working support is provided with a tooth-shaped structure, the tail part of the working support is connected with the fixed support in a tooth shape, and a reserved hole for inserting the fixing bolt is formed between the teeth.

Preferably, the pawl is used as a main stressed component and is structurally arranged into a wedge block, the wedge block comprises a wedge block front surface and a wedge block back surface, the wedge block front surface is a plane, the wedge block back surface is a wedge surface, and a layer of lubricating layer is arranged on the surface of the wedge surface.

Preferably, the retaining device comprises a retaining state and a non-retaining state, and when the retaining device is in the retaining state, the pawl slides into a reserved groove on the surface of the pipe joint; when the retaining device is in a non-retaining state, the pawl slides out of the reserved groove and is tightly attached to the outer wall of the pipe joint under the action of the tensile force of the spring, and the pipe joint horizontally moves relative to the retaining device.

Preferably, the spring is arranged on one side surface of the fixed support and the working support close to the pipe joint.

Preferably, the preformed groove is wedge-shaped, the surface of the preformed groove close to the side wall of the well wall of the initial well is a front surface and is of a plane structure, the back surface of the preformed groove is a wedge surface, the surface of the preformed groove is provided with a preformed groove steel plate matched with the preformed groove in shape, and the surface of the preformed groove steel plate is provided with a lubricating layer.

Preferably, the section form of reserve groove is trapezoidal, and its long limit sets up to 100mm, and its minor face sets up to 50mm, and the width of reserve groove sets up to 100mm, and its degree of depth sets up to 60mm, and every reserve groove interval sets up to 50mm, and the thickness of reserve channel-section steel is 5 mm.

The beneficial effects of the utility model are embodied in: the utility model relates to an automatic stopping device of rectangle push pipe with pawl, this stopping device adopts the pawl, work props, a spring, the tube coupling stopping process is accomplished in the cooperation of devices such as fixing support, compare with the traditional stopping device who adopts the fixed pin, its advantage is in, the device simple structure, do not occupy working space, need not manual operation, degree of automation is high, it is shorter consuming time, the construction has more the continuity, can not only effectively solve push bench and tube coupling and roll back the problem, the effective control earth's surface subsides, and can make the construction of advancing to have more the continuity and effectively improve push pipe efficiency of construction.

Drawings

Fig. 1 is a cross-sectional view of a rectangular push pipe automatic stopping device with a pawl according to an embodiment of the present invention.

Fig. 2 is a cross sectional view of the rectangular push pipe automatic stopping device with the pawl according to the embodiment of the present invention.

Fig. 3 is a partial plan view of the rectangular push pipe automatic stopping device with the pawl in the stopping state of the present invention.

Fig. 4 is a partial plan view of the rectangular push pipe automatic stopping device with the pawl in a non-stopping state according to the embodiment of the present invention.

Fig. 5 is a partial sectional view of the rectangular push pipe automatic stopping device with the pawl in a non-stopping state according to the embodiment of the present invention.

Fig. 6 is a structural plan view of the rectangular push pipe automatic stopping device with the pawl of the embodiment of the present invention.

Fig. 7 is a structural section view of a rectangular push pipe automatic stopping device with a pawl according to an embodiment of the present invention.

Fig. 8 is a plan view of a pipe joint pre-groove of a rectangular pipe jacking automatic stopping device with pawls.

Fig. 9 is a sectional view of a pipe joint pre-groove of a rectangular pipe jacking automatic stopping device with a pawl according to an embodiment of the present invention.

Fig. 10 is a structural elevation view of a rectangular pipe jacking automatic stopping device with a pawl according to an embodiment of the present invention.

Reference is made to the accompanying drawings in which:

the device comprises a pipe jacking machine 1, a pipe joint 2, a pipe joint 3, a backstop device 4, a well wall side wall of a starting well, a jacking iron 5, a jack oil cylinder 6, an oil cylinder frame 7, a guide rail 8, a reserved groove 9, a pipe joint 21-Nth-1, a pipe joint 22-Nth, a pipe joint 23-Nth +1, a pipe joint 24-Nth +2, a backstop part 31, a fixing part 32, a pipe joint reserved groove 229-Nth, a reserved groove 239-Nth +1, a working support 311, a pawl 312, a fixing support 321, a fixing bolt 322, a spring 323, a spring fixing device 324, a reserved groove steel plate 91 and an anchor bar 92.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

the utility model provides a rectangle push pipe automatic stopping device 3 with pawl 312, including push bench 1, hydro-cylinder frame 7, jack hydro-cylinder 6, top iron 5, guide rail 8 and multistage tube coupling 2, automatic stopping device 3 includes stopping part 31 and fixed part 32, stopping part 31 sets up in tube coupling 2 both sides along the length direction horizontal symmetry of tube coupling 2 for fixed tube coupling 2, in this embodiment, stopping device 3 sets up in the tube coupling 2 lower half, and the quantity of stopping device 3 is provided with a set ofly at least; the pipe jacking stopping device 3 realizes the technology of stopping the pipe jacking machine 1 and the pipe joint 2 under the matching action of the stopping component 31, the fixing component 32 and other devices in the process of continuously jacking the pipe jacking machine 1 and the pipe joint 2;

the retaining component 31 comprises a working support 311 and a pawl 312 which are integrally formed, a reserved groove 9 matched with the pawl 312 is formed in the surface of the pipe joint 2, and the pawl 312 is connected with the reserved groove 9 in a sliding fit mode; the fixing part 32 is used for fixing the retaining part 31 and providing counter force for preventing the push bench 1 and the pipe joint 2 from retracting, and the fixing part 32 comprises a fixing support 321, a fixing bolt 322, a spring 323 and a spring fixing device 324;

the working support 311 is a force transmission component, the pawl 312 is a main stress component, the structure of the pawl is a wedge, preferably a wedge-shaped steel component, and the wedge comprises a wedge front surface and a wedge back surface, wherein the wedge front surface is a plane, a stress surface and a side close to the door, the wedge back surface is a wedge surface, a sliding surface and a side far away from the door, and a lubricating layer is arranged on the surface of the wedge surface;

the fixed support 321 is a main bearing component, the front surface of the fixed support 321 is provided with a fixed bolt 322, the back surface of the fixed support is fixed on the sidewall 4 of the well wall of the starting well, and the fixed support 321 is convenient to disassemble and assemble and can bear enough load;

the fixing bolt 322 is arranged at the tail of the working support 311 of the retaining component 31 and used for restricting the displacement of the retaining component 31 in the vertical and horizontal directions, the retaining component 31 horizontally rotates around the fixing bolt 322, the spring 323 is connected between the fixing support 321 and the working support 311 to limit the rotation stroke of the retaining component 31 relative to the fixing component 32, and two ends of the spring 323 are respectively provided with a spring fixing device 324 fixedly connected with the fixing support 321 and the working support 311;

in order to ensure the working stability of the retaining member 31, in this embodiment, the retaining member 31 includes a working support 311 and three pawls 312, the pawls 312 and the working support 311 are formed by cutting a whole steel plate, the tail of the working support 311 is provided with a tooth-shaped structure and is provided with a reserved insertion hole, the tail of the working support 311 is connected with the fixed support 321 in a tooth shape, and a reserved hole for inserting the fixing bolt 322 is formed between the teeth;

the retaining device 3 comprises a retaining state and a non-retaining state, and when the retaining device 3 is in the retaining state, the pawl 312 slides into the reserved groove 9 on the surface of the pipe joint 2; when the retaining device 3 is in a non-retaining state, the pawl slides out of the reserved groove 9 and clings to the outer wall of the pipe joint 2 under the action of the tensile force of the spring 323, and the pipe joint 2 moves horizontally relative to the retaining device 3;

the spring 323 is arranged on the fixed support 321 and one side surface of the working support 311 close to the pipe joint 2, and has enough elastic coefficient, and the spring 323 is in tension when in the stopping state and the non-stopping state of the stopping device 3;

when the retaining device 3 is converted from the non-retaining state to the retaining state, namely the preformed groove 9 moves forward to the vicinity of the pawl 312 along with the pipe joint 2, the pawl 312 naturally slides into the preformed groove 9 and is tightly abutted in the preformed groove 9 under the action of the spring 323; when the retaining device 3 is converted from the retaining state to the non-retaining state, namely under the thrust action of the jack cylinder 6, the pipe joint 2 moves forwards, the pawl 312 slides out of the reserved groove 9 and is continuously attached to the outer wall of the pipe joint 2 under the action of the spring 323;

as shown in fig. 8-10, the positions and the number of the preformed grooves 9 should correspond to the pawls 312, and should avoid the positions of the main bars of the pipe joint 2, while leaving enough thickness of the protective layer for the reinforcing bars; the reserved groove 9 is wedge-shaped, one surface of the reserved groove, close to the side wall 4 of the well wall of the starting well, is a front surface and is of a plane structure, the back surface of the reserved groove is a wedge surface, the arrangement of a wedge angle of the wedge surface ensures that the pawl 312 can naturally slide out when the pipe joint 2 is subjected to the action of a pushing force, a reserved groove steel plate 91 matched with the reserved groove 9 in shape is arranged on the surface of the reserved groove 9, a lubricating layer is arranged on the surface of the reserved groove steel plate 91, and the size of the reserved groove 9 is slightly larger than that of the pawl 312 in order to ensure that the pawl 312 smoothly slides out;

in this embodiment, the section of each of the preformed grooves 9 is trapezoidal, the long side of each of the preformed grooves is 100mm, the short side of each of the preformed grooves is 50mm, the width of each of the preformed grooves 9 is 100mm, the depth of each of the preformed grooves is 60mm, the distance between every two of the preformed grooves 9 is 50mm, and the thickness of each of the preformed groove steel plates 91 is 5 mm;

specifically, to make the working process of the retaining device 3 more clear, as shown in fig. 3-5, the pipe joint 2 includes an N-1 th pipe joint 21, an N-1 th pipe joint 22, an N +1 th pipe joint 23, and an N +2 th pipe joint 24, the reserve groove 9 includes an N-1 th pipe joint reserve groove 229 and an N +1 th pipe joint reserve groove 239 respectively disposed on the N-1 th pipe joint 22 and the N +1 th pipe joint 23, before the N +1 th pipe joint 23 is installed, the jack cylinder 6 is pushed forward, the retaining device 3 is fixed on the wall 4 of the well bore, under the action of the pushing force, the N +1 th pipe joint reserve groove 239 moves forward along with the N +1 th pipe joint 23 to the pawl 312 and naturally slides into the N +1 th pipe joint reserve groove 239, and then the cylinder retracts, at this time, the retaining member 31 is in the retaining state to play the retaining function; when the (N + 1) th pipe joint 23 is installed and starts to jack, the jack cylinder 6 pushes forward to gradually apply jacking force to the pipe pushing machine 1 and the pipe joint 2, at the moment, the pawl 312 slides out of the (N + 1) th pipe joint reserved groove 239, continuously clings to the outer wall of the pipe joint 2 under the action of the spring 323, and moves relative to the pipe joint, at the moment, the retaining part 31 is in a non-retaining state, and when the subsequent pipe joint 2 is installed and jacked, the working process is repeated.

Above, only the preferred embodiment of the present invention is not right the technical scope of the present invention makes any restriction, and the technical personnel in this industry can make some deformations and modifications under this technical scheme's enlightenment, all the basis the utility model discloses a technical essence is to any modification, the equivalent change and the modification of making of above embodiment, all still belong to the technical scheme's scope of the present invention.

Claims

1. The rectangular pipe jacking automatic retaining device with the pawl comprises a pipe jacking machine, an oil cylinder frame, a jack oil cylinder, a jacking iron, a guide rail and a plurality of sections of pipe joints, and is characterized in that the automatic retaining device comprises retaining parts and fixing parts, wherein the retaining parts are horizontally and symmetrically arranged on two sides of each pipe joint along the length direction of the pipe joint and used for fixing the pipe joints; the anti-return component comprises a working support and a pawl which are integrally formed, a reserved groove matched with the pawl is formed in the surface of the pipe joint, and the pawl is connected with the reserved groove in a sliding fit mode;

2. The rectangular push pipe automatic backstop device with the pawl is characterized in that the backstop device is arranged on the lower half part of a pipe joint, and at least one group of backstop devices is arranged.

3. The rectangular push pipe automatic retaining device with the pawls as claimed in claim 1, wherein the retaining member is provided with at least one pawl.

4. The rectangular push pipe automatic retaining device with the pawls as claimed in claim 1 or 3, wherein the retaining member comprises a working support and three pawls.

5. The automatic backstop device for rectangular jacking pipes with pawls according to claim 4, wherein the tail part of the working support is provided with a tooth-shaped structure, the tail part of the working support is connected with the fixed support in a tooth-shaped manner, and a reserved hole for inserting a fixing bolt is arranged between teeth.

6. The rectangular pipe jacking automatic retaining device with the pawls as claimed in claim 4, wherein the pawls are used as main stress members and are structured as wedges, and comprise a wedge front face and a wedge back face, the wedge front face is a plane, the wedge back face is a wedge face, and a layer of lubricating layer is arranged on the surface of the wedge face.

7. The rectangular pipe jacking automatic stopping device with the pawl is characterized in that the stopping device comprises a stopping state and a non-stopping state, and when the stopping device is in the stopping state, the pawl slides into a reserved groove in the surface of the pipe joint; when the retaining device is in a non-retaining state, the pawl slides out of the reserved groove and is tightly attached to the outer wall of the pipe joint under the action of the tensile force of the spring, and the pipe joint horizontally moves relative to the retaining device.

8. The automatic rectangular pipe jacking stop device with the pawl as claimed in claim 7, wherein the spring is arranged on one side of the fixed support and the working support close to the pipe joint.

9. The rectangular pipe jacking automatic retaining device with the pawls as claimed in claim 7, wherein the pre-groove is wedge-shaped, the side of the pre-groove close to the side wall of the well wall of the initial well is a front side and is of a plane structure, the back side of the pre-groove is a wedge surface, the surface of the pre-groove is provided with a pre-groove steel plate matched with the shape of the pre-groove, and the surface of the pre-groove steel plate is provided with a lubricating layer.

10. The rectangular pipe jacking automatic retaining device with the pawls as claimed in claim 9, wherein the sectional form of the preformed groove is trapezoidal, the long side of the preformed groove is set to be 100mm, the short side of the preformed groove is set to be 50mm, the width of the preformed groove is set to be 100mm, the depth of the preformed groove is set to be 60mm, the distance between every two preformed grooves is set to be 50mm, and the thickness of the preformed groove steel is 5 mm.