CN218991585U

CN218991585U - Sealing device for shield tunneling machine and shield tunneling machine

Info

Publication number: CN218991585U
Application number: CN202223356428.9U
Authority: CN
Inventors: 尹恒祥; 李千垒; 张正发; 程龙新
Original assignee: Shanghai Mengqi Industrial Co ltd
Current assignee: Shanghai Mengqi Industrial Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-05-09
Anticipated expiration: 2032-12-14

Abstract

The utility model discloses a sealing device for a shield machine and the shield machine, and relates to the technical field of shield machines. The device comprises a middle shield, wherein a shield tail is arranged on the outer wall of the middle shield, a sealing device is arranged between the inner wall of the middle shield and the outer wall of the shield tail, and an air inlet hole and an air outlet hole are respectively formed in the shield tail; the sealing device comprises a first air cushion, the inner wall of the first air cushion is fixed with the outer wall of the shield tail, the outer wall of the first air cushion is fixedly connected with a sealing piece, the inner wall of the middle shield is provided with a groove, and the outer wall of the first air cushion is matched with the inner wall of the groove. According to the utility model, through the arrangement of the sealing component, when the position between the middle shield and the shield tail is changed in the operation process of the shield machine, the first air cushion is deflated, so that the sealing element cannot be contacted with the middle shield, but the telescopic pipe and the second air cushion can still play a sealing role, meanwhile, the friction between the sealing component and the middle shield and between the sealing component and the shield tail is reduced, and the service life of the sealing component is ensured.

Description

Sealing device for shield tunneling machine and shield tunneling machine

Technical Field

The utility model relates to the technical field of shield machines, in particular to a sealing device for a shield machine and the shield machine.

Background

The shield tunneling machine is a tunnel tunneling machine using a shield tunneling method, and when the shield tunneling machine performs tunnel construction underground, in order to facilitate deviation correction and turning, a hinge device is often arranged between a middle shield and a shield tail, and after the hinge device is arranged, a sealing device is required to be added to prevent pressure-bearing water and soil and sand in a stratum from entering the hinge device.

The sealing device for the shield machine and the shield machine disclosed by application number 201410158062.5 are suitable for connecting a middle shield cylinder and a tail shield cylinder of the shield machine and comprise a first sealing ring, a second sealing ring and a positioning ring; the device provided by the utility model can bear larger pressure ratio.

The hinge device is arranged between the middle shield and the shield tail, when the shield machine works, the position between the middle shield and the shield tail can be changed, although the pressure ratio which can be born by the sealing device is larger, the position between the middle shield and the shield tail can be changed, so that the internal abrasion of the sealing device can be caused, the service life of the sealing device is reduced, and the sealing device and the shield machine for the shield machine are provided for solving the problems.

Disclosure of Invention

The utility model aims to provide a sealing device for a shield machine and the shield machine, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the sealing device for the shield machine comprises a middle shield, wherein a shield tail is arranged on the outer wall of the middle shield, a sealing device is arranged between the inner wall of the middle shield and the outer wall of the shield tail, and an air inlet hole and an air outlet hole are respectively formed in the shield tail;

the sealing device comprises a first air cushion, the inner wall of the first air cushion and the outer wall of a shield tail are fixed, the outer wall of the first air cushion is fixedly connected with a sealing element, the inner wall of the middle shield is provided with a groove, the outer wall of the first air cushion and the inner wall of the groove are matched, one end of the inner part of the middle shield is provided with a first limiting groove, the inner part of the first limiting groove is fixedly connected with a second air cushion, one end of the outer part of the shield tail is provided with a second limiting groove, one end of the second air cushion is fixed with the inner wall of the second limiting groove, a telescopic pipe is arranged between the middle shield and the shield tail, the air inlet end of the first air cushion is provided with an air inlet device, the air outlet end of the first air cushion is fixedly connected with an air pressure detecting instrument, the air inlet end of the second air cushion is provided with an air pressure detecting instrument, and one end of the air pressure detecting instrument is provided with a valve respectively.

Preferably, the air inlet device comprises an air pump, the air outlet end of the air pump is fixed with the air outlet end of the first air cushion, and a one-way valve is fixedly connected between the air outlet end of the air pump and the air outlet end of the first air cushion.

Preferably, the sealing element is made of natural rubber latex, and the telescopic tube is made of nitrile rubber.

Preferably, the first air cushion is made of wear-resistant materials, and the second air cushion is made of wear-resistant materials.

Preferably, the valve adopts an electronic valve, and one end of the valve is connected with a warning lamp.

Preferably, the guiding gutter has been seted up to the outer wall of shield tail, the one end fixedly connected with locating part of well shield inner wall.

A shield tunneling machine comprising a sealing device for a shield tunneling machine according to any of claims 1-6.

Compared with the prior art, the utility model has the beneficial effects that:

this a sealing device and shield constructs machine for shield constructs machine, through seal assembly's setting, when shield constructs the machine operation in-process, the position between well shield and the shield tail changes, no. one air cushion gassing for the sealing member can not contact with well shield, but flexible pipe and No. two air cushion still can play sealed effect, have reduced seal assembly simultaneously and well shield, the friction between the shield tail, have guaranteed this seal assembly's life.

This a sealing device for shield constructs machine and shield constructs machine through the setting of air pressure detecting instrument, can real-time detection air cushion and No. two inside atmospheric pressure conditions of air cushion through air pressure detecting instrument, can judge whether the damage appears in air cushion and No. two air cushions according to the atmospheric pressure, if appear damaging then the warning light lights, reminds the staff, has improved the practicality of device.

Drawings

FIG. 1 is a cross-sectional view of the present utility model;

FIG. 2 is a partial cross-sectional view of a first cushion of the present utility model;

fig. 3 is a partial cross-sectional view of the second cushion of the present utility model.

In the figure: 1. middle shield; 2. a shield tail; 3. a first air cushion; 4. a seal; 5. a first limit groove; 6. a second air cushion; 7. a second limit groove; 8. a telescopic tube; 9. an air pressure detecting instrument; 10. a valve; 11. a diversion trench; 12. and a limiting piece.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, it should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale, e.g., the thickness or width of some layers may be exaggerated relative to other layers for ease of description.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined or illustrated in one figure, no further detailed discussion or description thereof will be necessary in the following description of the figures.

As shown in fig. 1-3, the present utility model provides a technical solution: the sealing device for the shield machine comprises a middle shield 1, wherein a shield tail 2 is arranged on the outer wall of the middle shield 1, a sealing device is arranged between the inner wall of the middle shield 1 and the outer wall of the shield tail 2, and an air inlet hole and an air outlet hole are respectively formed in the shield tail 2;

the sealing device comprises an air cushion 3, the inner wall of the air cushion 3 is fixed with the outer wall of a shield tail 2, the outer wall of the air cushion 3 is fixedly connected with a sealing piece 4, a groove is formed in the inner wall of the middle shield 1, the outer wall of the air cushion 3 is matched with the inner wall of the groove, a limit groove 5 is formed in one end of the inner portion of the middle shield 1, a second air cushion 6 is fixedly connected with one end of the limit groove 5, a second limit groove 7 is formed in one end of the outer portion of the shield tail 2, one end of the second air cushion 6 is fixed with the inner wall of the second limit groove 7, a telescopic pipe 8 is arranged between the middle shield 1 and the shield tail 2, an air inlet device is arranged at the air inlet end of the first air cushion 3, an air pressure detecting instrument 9 is fixedly connected with the air inlet end of the first air cushion 3, an air pressure detecting instrument 9 is arranged at the air inlet end of the second air cushion 6, and a valve 10 is respectively arranged at one ends of the two air pressure detecting instruments 9.

The air inlet device comprises an air pump, the air outlet end of the air pump is fixed with the air outlet end of the first air cushion 3, and a one-way valve is fixedly connected between the air outlet end of the air pump and the air outlet end of the first air cushion 3.

The sealing element 4 is made of natural rubber latex, and the telescopic tube 8 is made of nitrile rubber.

The first air cushion 3 is made of wear-resistant materials, and the second air cushion 6 is made of wear-resistant materials.

The valve 10 adopts the electronic valve, and the one end of valve 10 is connected with the warning light.

The outer wall of the shield tail 2 is provided with a diversion trench 11, and one end of the inner wall of the middle shield 1 is fixedly connected with a limiting piece 12.

Because there is the clearance between the inner wall of well shield 1 and the outer wall of shield tail 2, this clearance is less, make the most of water stain or particulate matter that can get into this clearance, in shield machine operation in-process, the distance between shield 1 and the shield tail 2 changes and presents periodic variation, and there is a period position all fixed between well shield 1 and the shield tail 2, it is the inside air inlet to the air cushion 3 of No. 1 to admit air at this period of time air device, sealing member 4 uses natural latex, it has elasticity, the inflation of air cushion 3 makes the outer wall of sealing member 4 and the inside contact of well shield 1, in order to increase the leakproofness of the device, in the middle of change in position between shield 1 and the shield tail 2, then through valve 10 with the inside gas release of air cushion 3 of No. 1, the shrink of air cushion 3, make there is the space between the outer wall of sealing member 4 and the air cushion 1 of well, this space still can avoid some impurity to get into inside, from the air cushion 6 of No. 2 aerifys in No. 6 after the inflation is accomplished, no. 6 is pore-free, in No. 6, it takes place the inside air cushion 6 is also changed along with the change in shape 6 of air cushion 6, the inside air cushion 6 of No. 6 takes place, the inside air cushion 6 is detected along with the change in real-time, the air pressure instrument is measured, no. 6 is changed, the inside air cushion 8 takes place, and the inside is measured.

The air pressure detecting instrument 9 can detect the internal air pressure conditions of the first air cushion 3 and the second air cushion 6, and when the first air cushion 3 and the second air cushion 6 are damaged, the air pressure detecting instrument 9 can display the damage conditions. When the air pump is opened to inflate the first air cushion 3 and the second air cushion 6, but the air pressure detecting instrument 9 displays the constant value or slowly rises, and when the air pump is stopped, the air pressure detecting instrument 9 displays the descending value, so that the air pump can indicate that the first air cushion 3 or the second air cushion 6 is in air leakage, and the first air cushion 3 or the second air cushion 6 needs to be replaced.

When the sealing device is installed, the limiting piece 12 is not fixed, and after the sealing device is installed, the limiting piece 12 is fixed again.

When the position between the middle shield 1 and the shield tail 2 changes, the air inlet component connected with the second air cushion 6 changes along with the change of the distance between the middle shield 1 and the shield tail 2, the distance between the middle shield 1 and the shield tail 2 becomes larger, the distance between the first limit groove 5 and the second limit groove 7 becomes larger, the air pump is started to enter the second air cushion 6, at the moment, the valve 10 is closed, the air pressure in the second air cushion 6 increases, the expansion begins, the distance between the middle shield 1 and the shield tail 2 becomes shorter, the air pump is closed, the valve 10 is opened, the distance between the middle shield 1 and the shield tail 2 becomes shorter, the middle shield 1 and the shield tail 2 forms thrust to the second air cushion 6, the air in the second air cushion 6 is compressed, and only flows into the valve 10 from the air pump due to the arrangement of the one-way valve, finally flows out of the valve 10, the second air cushion 6 changes along with the change of the distance between the middle shield 1 and the shield tail 2, the sealing device can effectively avoid the possibility that water stains penetrate into the device through gaps between the middle shield 1 and the shield tail 2, meanwhile, no matter how the distance between the middle shield 1 and the shield tail 2 changes, the No. two air cushions 6 are always connected with the No. one limiting groove 5 and the No. two limiting groove 7, the sealing performance of the sealing device is ensured, through the arrangement of the sealing component, when the position between the middle shield 1 and the shield tail 2 changes in the operation process of the shield machine, the No. one air cushion 3 is deflated, the sealing component 4 can not be contacted with the middle shield 1, but the telescopic pipe 8 and the No. two air cushions 6 can still play a sealing role, meanwhile, the friction between the sealing component and the middle shield 1 and the shield tail 2 is reduced, the service life of the sealing component is ensured, the internal air pressure conditions of the No. one air cushion 3 and the No. two air cushions 6 can be detected in real time through the air pressure detecting instrument 9 through the arrangement of the air pressure detecting instrument 9, whether the first air cushion 3 and the second air cushion 6 are damaged or not can be judged according to the air pressure, if the first air cushion and the second air cushion are damaged, the warning lamp is turned on, workers are reminded, and the practicability of the device is improved.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A sealing device for shield constructs machine, includes well shield (1), its characterized in that: a shield tail (2) is arranged on the outer wall of the middle shield (1), a sealing device is arranged between the inner wall of the middle shield (1) and the outer wall of the shield tail (2), and an air inlet hole and an air outlet hole are respectively formed in the shield tail (2);

sealing device includes air cushion (3), the outer wall of the inner wall of air cushion (3) and shield tail (2) is fixed, the outer wall fixedly connected with sealing member (4) of air cushion (3), the recess is seted up to the inner wall of well shield (1), the inner wall looks adaptation of the outer wall of air cushion (3) and recess, spacing groove (5) have been seted up to the inside one end of well shield (1), the inside fixedly connected with No. two air cushion (6) of spacing groove (5), no. two spacing groove (7) have been seted up to the outside one end of shield tail (2), the one end of No. two air cushion (6) and the inner wall of No. two spacing groove (7) are fixed mutually, install flexible pipe (8) between well shield (1) and the shield tail (2), air cushion (3) inlet end installs air inlet unit, the end fixedly connected with air pressure detecting instrument (9) of giving vent to anger, the end of giving vent to anger of No. two air cushion (6) installs and detects (9), the one end of two air cushion instrument (9) air pressure detecting instrument (10) are installed respectively.

2. The sealing device for a shield tunneling machine according to claim 1, wherein: the air inlet device comprises an air pump, the air outlet end of the air pump is fixed with the air outlet end of the first air cushion (3), and a one-way valve is fixedly connected between the air outlet end of the air pump and the air outlet end of the first air cushion (3).

3. The sealing device for a shield tunneling machine according to claim 1, wherein: the sealing piece (4) is made of natural latex, and the telescopic pipe (8) is made of nitrile rubber.

4. The sealing device for a shield tunneling machine according to claim 1, wherein: the first air cushion (3) is made of wear-resistant materials, and the second air cushion (6) is made of wear-resistant materials.

5. The sealing device for a shield tunneling machine according to claim 1, wherein: the valve (10) adopts an electronic valve, and one end of the valve (10) is connected with a warning lamp.

6. The sealing device for a shield tunneling machine according to claim 1, wherein: the outer wall of the shield tail (2) is provided with a diversion trench (11), and one end of the inner wall of the middle shield (1) is fixedly connected with a limiting piece (12).

7. The utility model provides a shield constructs machine which characterized in that: a sealing device for a shield machine comprising the device of any one of claims 1-6.