CN219197334U

CN219197334U - Anti-gushing structure of shield screw machine

Info

Publication number: CN219197334U
Application number: CN202320111488.XU
Authority: CN
Inventors: 温法庆; 王朝晖; 胡军; 常喜军; 邓小杰; 董刘强
Original assignee: China Railway 18th Bureau Group Co Ltd; Third Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Current assignee: China Railway 18th Bureau Group Co Ltd; Third Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Priority date: 2023-01-16
Filing date: 2023-01-16
Publication date: 2023-06-16
Anticipated expiration: 2033-01-16

Abstract

The utility model discloses a blowout prevention structure of a shield screw machine, which comprises an inspection port and a drainage pressure reducing device, wherein the inspection port is arranged at the front end of the shield screw machine and comprises a first inspection port and a second inspection port, the first inspection port is arranged on the side wall of the front end of the shield screw machine, the second inspection port is arranged above the front end of the shield screw machine, the second inspection port is connected with the drainage pressure reducing device, and a hose is arranged at the tail end of the drainage pressure reducing device. The shield spiral machine blowout prevention structure solves the problem that muddy water in a tunnel is not easy to treat due to shield spiral machine blowout, improves the tunneling speed of the shield machine, is beneficial to avoiding a series of adverse effects due to shield spiral machine blowout, and has obvious economic benefit and social benefit.

Description

Anti-gushing structure of shield screw machine

Technical Field

The utility model relates to the technical field of shield construction, in particular to a blowout prevention structure of a shield spiral machine.

Background

In a strong water-rich hard rock stratum developed by karst, shield pushing is slow, the pressure of a soil bin is not easy to build, pressurized water with a certain pressure is easy to carry slag to gush, a shield machine is constructed in the water-rich stratum, the problem of gushing of a screw machine is easy to occur, the problems of slow tunneling, pollution of a tunnel by muddy water and the like are caused, and the influence of mud water cleaning on the shield construction progress is large. The strong water-rich sand ovum (gravel) stone stratum is easy to spray out the pressure-bearing water carrying sand (gravel), which is easy to cause excessive slag discharge, and in severe cases, the stratum settlement is excessive, the deformation of a building (structure) is excessive, and even collapse is caused.

In the prior art, the flow plasticity of the slag is improved by improving the slag so as to reduce the gushing of the shield screw machine. However, the problems of stratum difference and a method for improving dregs are solved, and the shield spiral machine gushing is difficult to control.

Disclosure of Invention

The utility model aims to provide a blowout prevention structure of a shield screw machine, which can control the blowout problem of the screw machine, solve the problem that muddy water in a tunnel is not easy to treat caused by the blowout of the shield screw machine, and improve the tunneling speed of the shield machine.

In order to achieve the above purpose, the utility model provides a blowout prevention structure of a shield screw machine, which comprises an inspection port and a drainage pressure reducing device, wherein the inspection port is arranged at the front end of the shield screw machine, the inspection port comprises a first inspection port and a second inspection port, the first inspection port is arranged on the side wall of the front end of the shield screw machine, the second inspection port is arranged above the front end of the shield screw machine, the second inspection port is connected with the drainage pressure reducing device, and a hose is arranged at the tail end of the drainage pressure reducing device.

Preferably, the shield screw machine further comprises a slag outlet arranged at the rear end of the shield screw machine.

Preferably, the drainage pressure reducing device comprises a first pipe nipple, a gate valve and a drain pipe assembly, a filter screen is arranged in the first pipe nipple, a ball valve is arranged on the outer wall of the first pipe nipple, the ball valve is positioned on the upper portion of the filter screen, a second pipe nipple, an elbow and a joint which are fixedly connected in sequence are arranged on the drain pipe assembly, and the joint is fixedly connected with the hose through a pipe clamp.

Preferably, the filter screen is provided with a plurality of through holes, and the through holes are distributed in a plum blossom shape.

Preferably, the first pipe nipple is fixedly connected with the second inspection port through the first flange, the second flanges are arranged at two ends of the gate valve, the upper end of the gate valve is fixedly connected with the second pipe nipple on the drain pipe assembly through the second flange, and the lower end of the gate valve is fixedly connected with the first pipe nipple through the second flange.

Preferably, an inner hole is formed in the center of the first flange, and the diameter of the inner hole is smaller than the width of the second inspection opening.

Therefore, the shield spiral machine blowout prevention structure can control the shield spiral machine blowout through the drainage pressure reducing device at the front end of the shield spiral machine in a strong water-rich hard rock stratum and a strong water-rich sand ovum (gravel) stone stratum which are developed in karst. The mud water with certain pressure is discharged to the rear part of the trolley through the hose, so that the mud water is cleared, the problem that tunnel mud water is not easy to treat due to the gushing of the shield spiral machine is solved, the tunneling speed of the shield machine is improved, a series of adverse effects due to the gushing of the shield spiral machine are avoided, and obvious economic benefits and social benefits are achieved.

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic diagram of an embodiment of a blowout prevention structure of a shield screw machine according to the present utility model;

FIG. 2 is a schematic diagram of an embodiment of a drainage pressure relief device of a blowout prevention structure of a shield screw machine according to the present utility model;

FIG. 3 is a schematic view of a structure of an embodiment of a partial through hole in a filter screen of a blowout prevention structure of a shield screw according to the present utility model.

Reference numerals

1. A first inspection port; 2. a second inspection port; 3. a drainage pressure reducing device; 4. a slag outlet; 5. a hose; 6. a first pipe nipple; 7. a gate valve; 8. the second pipe nipple; 9. an elbow; 10. a joint; 11. a filter screen; 12. a ball valve; 13. a through hole; 14. a first flange; 15. a second flange; 16. and (5) pipe clamps.

Detailed Description

The technical scheme of the utility model is further described below through the attached drawings and the embodiments.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

As shown in fig. 1, the utility model discloses a blowout prevention structure of a shield screw machine, which comprises an inspection port and a drainage pressure reducing device 3 which are arranged at the front end of the shield screw machine, and also comprises a slag hole 4 which is arranged at the rear end of the shield screw machine. Through the inspection port and the drainage pressure reducing device 3 which are additionally arranged on the shield screw machine and work together with the slag hole 4, the shield screw machine is ensured not to gush when running.

The inspection port comprises a first inspection port 1 and a second inspection port 2, and the first inspection port 1 is arranged on the side wall of the front end of the shield spiral machine, so that workers can conveniently overhaul the internal condition of the shield spiral machine. The second inspection port 2 is arranged above the front end of the shield screw machine, and the specific position of the second inspection port 2 can be finely adjusted according to the internal space of the equipment in the installation state of the shield screw machine.

The second inspection port 2 is connected with a drain pressure reducing device 3, and as shown in fig. 2, the drain pressure reducing device 3 includes a first pipe nipple 6, a gate valve 7, and a drain pipe assembly. The drain pipe assembly is a second pipe nipple 8, an elbow 9 and a joint 10 which are fixedly connected in sequence. The joint 10 is fixedly connected with a hose 5 arranged at the tail end of the drainage pressure reducing device 3 through a pipe clamp 16. The hose 5 can be provided with a plurality of hoses 5 with equal diameters which are connected in sections, and the sections are fixedly connected through the joint 10 and the pipe clamp 16. After the hose 5 is connected with the connector 10, the hose extends to the position of a soil falling port of the belt conveyor towards the rear part of the trolley, so that muddy water with certain pressure can be discharged into a soil box of the battery car or a sewage box on the trolley, and the muddy water with certain pressure plays a role in pressure reduction in the discharging process of the hose 5.

The gate valve 7 is installed between the first pipe nipple 6 and the drain pipe assembly, two ends of the gate valve 7 are respectively provided with a second flange 15, the upper end of the gate valve 7 is fixedly connected with a second pipe nipple 8 on the drain pipe assembly through the second flanges 15, and the lower end of the gate valve 7 is fixedly connected with the first pipe nipple 6 through the second flanges 15.

The gate valve 7 can be matched with the slag hole 4, before the slag hole 4 is opened, the gate valve 7 is opened preferentially, partial pressure-bearing water is discharged, the discharge pressure of dregs after the slag hole 4 of the shield screw machine is opened can be effectively reduced, and the purpose of avoiding the gushing of the shield screw machine is achieved.

The first pipe nipple 6 is fixedly connected with the second inspection port 2 on the shield spiral machine through the first flange 14, a filter screen 11 is arranged in the first pipe nipple 6, and as shown in fig. 3, a plurality of through holes 13 are formed in the filter screen 11, and the through holes 13 are distributed in a plum blossom shape. The mud water with certain pressure is smoothly discharged into the hose 5, and meanwhile, the large mud residue cannot be deposited and blocked inside the drainage pressure reducing device 3 and the hose 5.

The ball valve 12 is arranged on the outer wall of the first pipe nipple 6, the ball valve 12 is positioned on the upper portion of the filter screen 11, the ball valve 12 can be connected with pressurized water for shield tunneling, the filter screen 11 can be backwashed in use, the filter screen 11 is prevented from being blocked by mud residues, and the permeability of the filter screen 11 is ensured.

The assembly on the second inspection port 2 is fixedly connected with the shield screw machine through welding according to the technical requirement of screw machine welding, then, the second inspection port 2 is fixedly connected with the first flange 14 through a fastening bolt, an inner hole (not marked in the figure) is arranged at the center of the first flange 14, and the diameter of the inner hole is smaller than the width of the second inspection port 2 and is identical to the outer diameter of the first pipe nipple 6. The first pipe nipple 6 penetrates through the inner hole of the first flange 14 and is connected with the second inspection port 2, so that muddy water with certain pressure smoothly enters the drainage pressure reducing device 3.

In the actual use process, before the shield machine starts tunneling, checking the position of a second inspection port in the installation state of the shield screw machine, and if the position of the second inspection port 2 is directly used at the upper part of the shield screw machine; if the second inspection port 2 is not designed, the shield screw machine needs to be modified, the second inspection port 2 is additionally arranged, and the specific position can be adjusted according to the actual equipment space in the installation state of the shield screw machine.

The arrangement of the hoses 5 is preferably placed at the right side of the top of the trolley, and is arranged along the hydraulic and fluid pipelines, and hose jacking members are arranged according to the space condition of the top of the trolley, when the length of the required hoses 5 is too long, a plurality of hoses 5 with equal diameters can be connected in sections, and the sections are reliably fixed by the connectors 10 and the pipe clamps 16.

After the shield spiral machine is ready to work, starting the machine, if the shield spiral machine gushes, connecting the discharge port of the hose 5 into the earth box of the battery truck or the sewage box of the tail trolley, and transporting the muddy water out of the tunnel by the earth box of the battery truck or discharging the muddy water out of the tunnel by the sewage system of the shield machine.

When the shield tunneling machine starts tunneling, the slag hole 4 is opened before the gate valve 7 is opened, and part of the pressurized water is discharged. In the working process of the shield screw machine, muddy water with certain pressure is discharged through the hose 5, and the pressure muddy water plays a role in decompression in the discharging process of the hose 5.

Therefore, the shield spiral machine blowout prevention structure solves the problem of non-civilized construction in a tunnel caused by shield spiral machine blowout, improves the tunneling speed of the shield machine, is beneficial to avoiding a series of adverse effects caused by shield spiral machine blowout, and has remarkable economic and social benefits.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and although the present utility model has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the utility model can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the utility model.

Claims

1. The utility model provides a shield constructs spiral machine and prevents gushing structure which characterized in that: including setting up in the inspection port and the drainage pressure relief device of shield screw machine front end, the inspection port includes first inspection port and second inspection port, first inspection port is installed on the lateral wall of shield screw machine front end, the second inspection port is installed in the top of shield screw machine front end, the second inspection port with drainage pressure relief device is connected, drainage pressure relief device's end is equipped with the hose.

2. The shield spiral machine blowout prevention structure according to claim 1, wherein: the shield screw machine further comprises a slag hole arranged at the rear end of the shield screw machine.

3. The shield spiral machine blowout prevention structure according to claim 1, wherein: the drainage pressure reducing device comprises a first pipe nipple, a gate valve and a drain pipe assembly, a filter screen is arranged in the first pipe nipple, a ball valve is arranged on the outer wall of the first pipe nipple, the ball valve is located on the upper portion of the filter screen, a second pipe nipple, an elbow and a joint which are fixedly connected in sequence are arranged on the drain pipe assembly, and the joint is fixedly connected with the hose through a pipe clamp.

4. A shield screw machine blowout prevention structure according to claim 3, wherein: the filter screen is provided with a plurality of through holes which are distributed in a plum blossom shape.

5. A shield screw machine blowout prevention structure according to claim 3, wherein: the first pipe nipple is fixedly connected with the second inspection port through the first flange, the second flanges are arranged at the two ends of the gate valve, the upper end of the gate valve is fixedly connected with the second pipe nipple on the drain pipe assembly through the second flange, and the lower end of the gate valve is fixedly connected with the first pipe nipple through the second flange.

6. The shield spiral machine blowout prevention structure according to claim 5, wherein: an inner hole is formed in the center of the first flange, and the diameter of the inner hole is smaller than the width of the second inspection opening.