CN112746854B

CN112746854B - Grouting structure suitable for pipe joint locking prevention of push bench and push bench

Info

Publication number: CN112746854B
Application number: CN202110196062.4A
Authority: CN
Inventors: 孙余好; 吴亚华; 邢鹏飞; 林成青; 周煌
Original assignee: Nuclear Industry Jingxiang Construction Group Co Ltd
Current assignee: Nuclear Industry Jingxiang Construction Group Co Ltd
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2023-04-28
Anticipated expiration: 2041-02-22
Also published as: CN112746854A

Abstract

The invention relates to the field of building construction, in particular to control in the operation and construction process of a pipe jacking machine. The invention is realized by the following technical scheme: the utility model provides a prevent slip casting structure that pipe section is locked suitable for push bench, contains the blade disc subassembly and with the pipe section that the blade disc subassembly is connected, the blade disc subassembly contains blade disc and blade disc drive arrangement, still contains: the water inlet pipe, advance thick liquid pipe and discharge pipe, the inlet pipe is in extend in the inner chamber of tube coupling, the inlet pipe front end is connected with terminal pipe, offer on the tube coupling and supply the logical mouth of pipe that terminal pipe passed through. The invention aims to provide a grouting structure suitable for preventing pipe joints of a push bench from locking and the push bench, and the structure is used for cleaning key areas of the push bench in real time by effectively matching a water inlet pipe and a slurry inlet pipe of the push bench, so that the locking of joints is effectively prevented, and the operation efficiency of the push bench is improved.

Description

Grouting structure suitable for pipe joint locking prevention of push bench and push bench

Technical Field

The invention relates to the field of building construction, in particular to control in the operation and construction process of a pipe jacking machine.

Background

In recent years, with the increase of urban vehicle quantity and population quantity, urban construction pace is continuously accelerated, and problems such as traffic jam, potential safety hazards existing in pedestrian traffic and the like caused by repeated excavation of roads in urban municipal pipeline construction appear.

In order to solve the problem, a non-excavation technology is presented, and the non-excavation technology mainly utilizes a pipe jacking machine to carry out underground construction operation, and the pipe jacking construction has the characteristics of small excavation soil volume, high automation degree, high construction speed, no damage to existing facilities, no influence on social sequence, no influence on climate and the like, and has been widely used for pipeline engineering such as municipal drainage, water supply, electric power, industry and the like.

The push bench mainly comprises a push bench head arranged in the push bench and a cutter head arranged at the front end of the push bench head, soil at the front end of the push bench is cut by the cutter head, and meanwhile, a driving device such as an oil cylinder is used for pushing the push bench to advance along with the push bench. In the prior art, a water inlet pipe is arranged inside the jacking pipe, water enters the jacking pipe, and water is mixed with soil cut by the cutterhead, so that soil is discharged conveniently.

However, the operation environment of the push bench is complex and changeable, and when the environment is mostly soft soil stratum, the push bench is pushed smoothly. When the pipe jacking machine is actually constructed, the pipe jacking machine can tunnel in a rock section, and the situation that the pipe joint is locked and cannot be advanced is often caused.

Disclosure of Invention

The invention aims to provide a grouting structure suitable for preventing pipe joints of a push bench from locking and the push bench, and the structure is used for cleaning key areas of the push bench in real time by effectively matching a water inlet pipe and a slurry inlet pipe of the push bench, so that the locking of joints is effectively prevented, and the operation efficiency of the push bench is improved.

The invention is realized by the following technical scheme: the utility model provides a prevent slip casting structure that pipe section is locked suitable for push bench, contains the blade disc subassembly and with the pipe section that the blade disc subassembly is connected, the blade disc subassembly contains blade disc and blade disc drive arrangement, still contains: the water inlet pipe, advance thick liquid pipe and discharge pipe, the inlet pipe is in extend in the inner chamber of tube coupling, the inlet pipe front end is connected with terminal pipe, offer on the tube coupling and supply the siphunculus mouth that terminal pipe passed through, terminal pipe end contains and is used for the direction, with water towards regional stand pipe between blade disc subassembly and the rock wall.

Preferably, the plurality of pipe sections are arranged, the through pipe opening is arranged on a first pipe section and a second pipe section, and the first pipe section is the pipe section closest to the cutterhead assembly.

Preferably, the end pipe comprises a connecting pipe, one end of the connecting pipe is connected with the water inlet pipe, the other end of the connecting pipe is closed, a branch pipe is connected to the connecting pipe, the branch pipe comprises an extension pipe extending in the radial direction of a pipe joint and passing through the pipe opening and a guide pipe connected with the extension pipe, and the guide pipe extends in the axial direction of the pipe joint and is opened towards the cutter head assembly.

Preferably, the plurality of branch pipes are uniformly connected with the connecting pipes in a circumferential array.

As the preferable mode of the invention, the pulp inlet pipe and the discharge pipe are both positioned in the inner cavity of the pipe section, and the pipe section is provided with a pulp outlet communicated with the pulp inlet pipe.

Preferably, the slurry outlet and the through pipe opening are provided with buffer space areas in the axial direction of the pipe joint, and the length distance of the buffer space areas in the axial direction of the pipe joint is-meter.

Preferably, the slurry outlet is arranged on the fourth pipe joint and the fifth pipe joint.

The utility model provides a push bench, contains a slip casting structure that prevents pipe section locking suitable for push bench, still contains and is used for promoting the blade disc subassembly with the advancing device of pipe section forward propulsion, advancing device is located the pipe section is kept away from in the axial direction of pipe section the one side of blade disc subassembly.

Preferably, the propelling device comprises a plurality of hydraulic propelling rods and a propelling disc connected with the plurality of hydraulic propelling rods.

Preferably, the invention further comprises a rectifying joint, wherein the rectifying joint is positioned between two adjacent pipe joints.

In summary, the invention has the following beneficial effects:

1. high-pressure water is prevented from being directly beaten to the cutterhead and the cutterhead driving device through the inner cavity of the pipe joint, and damage to the cutterhead assembly after long-time work is avoided.

2. The high-pressure water is sprayed out of the pipe joint, so that the area between the outer side of the pipe joint and the rock wall is cleaned timely, the condition that the pipe joint is locked due to the blocking of stones in the area is the highest frequency, and the important cleaning of the area greatly reduces the occurrence of the condition that the pipe joint is locked.

3. The guiding direction of the guiding pipe is forward, so that the high-pressure water can clean the key areas, and the high-pressure water finally flows to the cutterhead to clean the surface of the cutterhead without damage.

4. The high-pressure water is brushed forwards again and mixed with the soil cleaned by the cutterhead to form slurry, so that the fluidity of the soil is increased, and the soil is convenient to discharge.

5. A buffer interval of 7-12 meters exists between the water outlet position and the slurry outlet position. This prevents the slurry from being washed away by the water immediately upon exiting the slurry outlet 32, facilitating the independence and support effect of the slurry outlet.

Description of the drawings:

FIG. 1 is a schematic diagram of example 1;

FIG. 2 is a schematic illustration of the mating of a pipe section with a water inlet pipe;

fig. 3 is a schematic view of the hidden pipe joint of fig. 2.

In the figure: 1. the device comprises a cutterhead, 2 cutterhead driving devices, 3, a first pipe joint, 4, a second pipe joint, 5, a fourth pipe joint, 6, an auxiliary deviation correcting joint, 7, a fifth pipe joint, 8, a pulp inlet pipe, 9, a water inlet pipe, 10, a discharge pipe, 11, a tail end pipe, 111, a connecting pipe, 112, a branch pipe, 1121, an extension pipe, 1122, a guide pipe, 31, a through pipe orifice, 32 and a pulp outlet.

The present invention will be described in further detail below.

Detailed Description

The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.

In embodiment 1, as shown in fig. 1, a grouting structure for preventing pipe joints of a pipe pushing jack from locking is provided, and the forefront (i.e., the leftmost end in fig. 1) is a cutterhead 1 and a cutterhead driving device 2. The structure of the cutterhead driving device 2 and the cutterhead 1 can be a mature structure in the prior art, and the structure does not need to be changed. The cutterhead driving device 2 drives the cutterhead 1 to rotate, and cuts and tunnels soil in the stratum ahead. Behind the cutterhead assembly, i.e. to the right in fig. 1, a plurality of pipe sections are provided. The pipe sections are named and numbered gradually increasing in the direction gradually far away from the cutterhead assembly, namely a first pipe section 3, a second pipe section 4, a third pipe section, a fourth pipe section 5 and a fifth pipe section 7 are respectively arranged from left to right in fig. 1.

As shown in fig. 1 and 2, in this case, a three-pipe independent design is adopted. Specifically, a slurry inlet pipe 8, a water inlet pipe 9 and a water outlet pipe 10 which are respectively independent are arranged in the inner cavity of the pipe section. The pipe joint is provided with a slurry outlet 32, and slurry flowing in the slurry inlet pipe 8 is discharged through the slurry outlet 32 and enters the outside of the pipe joint to be contacted with the rock wall. The method increases the structural strength near the rock wall in the construction process, increases the operation smoothness, and avoids the situation that the rock wall collapses due to the lack of soil and insufficient strength in the operation process. The key point in this case is the arrangement of the water inlet pipe 9. The water inlet pipe 9 is arranged in the inner cavity of the pipe section, and the front end of the water inlet pipe is connected with the tail end pipe 11. As shown in fig. 2 and 3, the rear section of the end pipe 11 is connected with the water inlet pipe 9, and the front end is sealed. The end pipe 11 includes a connection pipe 111 and a plurality of branch pipes 112 connected to the connection pipe 111. The branch pipes 112 are a plurality of and are uniformly distributed in a circumferential array. Each branch pipe 112 includes an extension pipe 1121 and a guide pipe 1122. The pipe section is provided with a through pipe opening 31, the extension pipe 1121 extends in the radial direction of the pipe section and extends through the through pipe opening 31, and the guide pipe 1122 extends in the axial direction of the pipe section and the pipe opening faces forward.

By the arrangement of such a water inlet pipe 9, the following benefits are obtained: first, avoid high-pressure water to directly beat to blade disc 1 and blade disc drive arrangement 2 through the tube coupling inner chamber, avoid the damage that causes the blade disc subassembly after long-time work. Secondly, the high-pressure water is sprayed out of the pipe joint, so that the area between the outer side of the pipe joint and the rock wall is cleaned timely, the condition that the pipe joint is locked due to the blocking of stones in the area is the highest frequency, and the important cleaning of the area greatly reduces the occurrence of the condition that the pipe joint is locked. Third, the guiding direction of the guiding tube 1122 is forward, so that the high-pressure water not only can clean the important area, but also can flow to the cutterhead 1, and the surface of the cutterhead 1 is cleaned without damage. Fourth, the high-pressure water is brushed forward again and mixed with the soil cleaned by the cutterhead 1 to form slurry, so that the fluidity of the soil is increased, and the soil is discharged conveniently.

The water entering through the water inlet pipe 9, the soil generated in the advancing process and the slurry entering through the slurry inlet pipe 8 are finally smoothly discharged through the discharge pipe 10.

In this embodiment, the same is designed for the location where water and slurry enter. As shown in fig. 1 and 2, the position of the through-hole 31 is set in the first pipe section 3 and the second pipe section 4. The grout outlet 32 is arranged in the fourth pipe joint 5 and the fifth pipe joint 7 more backward, and the grout outlet 32 is not arranged on the third pipe joint, so that a buffer zone is formed between the grout outlet position and the grout outlet position. The technical effect of this design is, on the one hand, the water outlet is more preceding, and is more abundant to the water pressure of clearance of the region between the tube coupling outside in front and the rock wall, and cleaning effect is better. On the other hand, the buffer interval of 7-12 m is kept to prevent the slurry from being washed away by water immediately after the slurry comes out of the slurry outlet 32, so that the independence and the supporting effect of the slurry outlet are facilitated.

The pipe pushing machine comprises the grouting structure for preventing pipe joints from locking, and a pushing device, wherein the grouting structure is suitable for the pipe pushing machine, the pushing device is arranged at the rear part (not shown) of the pipe joints in FIG. 1, and a hydraulic driving mode can be adopted. The propelling device can comprise a plurality of hydraulic rods which are parallel to each other, and the front ends of the hydraulic rods are commonly connected with a propelling disc. When the hydraulic rod stretches out, the pushing disc pushes the pipe joint to push forward.

As shown in fig. 1, an auxiliary deviation correcting joint 6 is added between part of adjacent pipe joints, such as the fourth pipe joint 5 and the fifth pipe joint 7 in fig. 1, so as to facilitate direction correction of a route in the process that certain pushing routes have certain folding angles.

Claims

1. The utility model provides a prevent slip casting structure that pipe section is locked suitable for push bench, contains the blade disc subassembly and with the pipe section that the blade disc subassembly is connected, the blade disc subassembly contains blade disc (1) and blade disc drive arrangement (2), its characterized in that still contains: the water inlet pipe (9), the slurry inlet pipe (8) and the discharge pipe (10), the water inlet pipe (9) extends in the inner cavity of the pipe section, the front end of the water inlet pipe (9) is connected with a tail pipe (11), a through pipe opening (31) for the tail pipe (11) to pass through is formed in the pipe section, the tail end of the tail pipe (11) comprises a guide pipe (1122) for guiding water to the area between the cutterhead assembly and the rock wall, the pipe sections are multiple, the through pipe opening (31) is arranged on the first pipe section (3) and the second pipe section (4), the first pipe section (3) is the pipe section closest to the cutterhead assembly, the tail pipe (11) comprises a connecting pipe (111), one end of the connecting pipe (111) is connected with the water inlet pipe (9), the other end of the connecting pipe is closed, the connecting pipe (111) is connected with a branch pipe (112), the branch pipe (112) comprises a protruding pipe (1121) extending in the radial direction of the pipe section and passing through the port (31) and a guiding pipe (1121) connected with the protruding pipe (1121) and the protruding pipe (1122) extends in the axial direction of the pipe section (1122) towards the inner cavity (10), the pipe joint is provided with a slurry outlet (32) communicated with the slurry inlet pipe (8); the through pipe opening (31) is closer to the cutter disc (1) than the slurry outlet opening (32) in the axial direction of the pipe joint, slurry flowing in the slurry inlet pipe (8) is discharged through the slurry outlet opening (32) and enters the outside of the pipe joint to be in contact with the rock wall, so that the structural strength of the rock wall is increased, and collapse of the rock wall is avoided.

2. The grouting structure for preventing pipe joints from locking, which is applicable to a pipe jacking machine, according to claim 1, is characterized in that: the plurality of branch pipes (112) are uniformly connected with the connecting pipes (111) in a circumferential array.

3. The grouting structure for preventing pipe joints from locking, which is applicable to a pipe jacking machine, according to claim 1, is characterized in that: the slurry outlet (32) and the through pipe (31) are provided with buffer space areas in the axial direction of the pipe joint, and the length distance of the buffer space areas in the axial direction of the pipe joint is 7-11 meters.

4. The grouting structure for preventing pipe joints from locking, which is applicable to a pipe jacking machine, according to claim 3, is characterized in that: the slurry outlet (32) is arranged on the fourth pipe joint (5) and the fifth pipe joint (7).

5. A push bench comprising a grouting structure for preventing pipe joints from locking, which is applicable to the push bench, according to any one of claims 1 to 4, and is characterized in that: the pipe joint is characterized by further comprising a propelling device for propelling the cutterhead assembly and the pipe joint to propel forwards, wherein the propelling device is positioned on one side of the pipe joint away from the cutterhead assembly in the axial direction of the pipe joint.

6. The push bench of claim 5, wherein: the propelling device comprises a plurality of hydraulic propelling rods and a propelling disc connected with the hydraulic propelling rods.

7. The push bench of claim 6, wherein: the pipe joint further comprises a deviation rectifying joint, and the deviation rectifying joint is positioned between two adjacent pipe joints.