CN219826825U - Rapid emergency sealing device for shield tail - Google Patents

Abstract

The utility model provides a maintainable shield tail rapid emergency sealing device, which relates to the field of shield tail rapid emergency sealing, and adopts the following scheme: including the mount pad, the mount pad evenly sets up on shield tail inner wall, still includes the inflatable seal circle, inflatable seal circle encircles the section of jurisdiction, and inflatable seal circle is provided with the trachea, trachea and air supply intercommunication, inflatable seal's inner circle can with elastic support piece butt, elastic support piece multistage formula structure, elastic support piece includes a plurality of sub-support pieces, sub-support piece's stiff end with the mount pad can be dismantled and be connected, sub-support piece's removal end movably sets up in the mount pad, the mount pad sets up at shield tail strengthening ring front end. The utility model can carry out quick emergency sealing on the leakage of the sealing device, and avoid leakage spreading to cause major accidents.

Description

Rapid emergency sealing device for shield tail

Technical Field

The utility model relates to the field of shield tail emergency sealing, in particular to a rapid emergency sealing device for a shield tail.

Background

In the tunneling process of the shield machine, because a gap exists between the shield shell and the outer wall of the duct piece (as shown in fig. 1), in order to prevent external water or slurry and other impurities from entering the shield body in the shield process, the gap between the shield tail and the duct piece must be sealed, meanwhile, the seal of the shield tail must be capable of bearing the pressure generated by the soil pressure and the water pressure, and the slurry pressure, so that the sealing effect is particularly important for engineering safety.

The early shield tail sealing device adopts a rubber sealing piece, and the method is to install the whole circle of rubber sealing piece on a shield tail steel plate, and press the rubber sealing piece by means of a duct piece and a shield shell to prevent external water and mud from entering. However, the sealing method has higher requirement on the wear resistance of the rubber part and is not easy to replace after being worn, so that the sealing mode which is ideal and commonly used at present is that a plurality of steel wire tail brushes are arranged on the inner wall of the shield tail for sealing, grease is filled between the tail brushes, friction exists between the tail brushes and the duct piece, the shield tail device is easily damaged due to overlarge friction force, the shield tail grease can also lubricate and protect the steel wire brushes from rusting and damage, friction force between the duct piece and the shield tail brushes is reduced, and service life of the shield tail brushes is prolonged.

However, long-distance construction is carried out, the abrasion of the steel wire tail brush is caused, the sealing effect is greatly reduced, once leakage occurs at the tail of the shield, quick and effective blocking is difficult to carry out, as mud enters the shield machine, the ground surface subsides due to light weight, the ground surface collapses due to heavy weight, and even the shield machine is buried.

Disclosure of Invention

In order to solve the technical problems that the shield tail leakage in the prior art is difficult to quickly and effectively block and large accidents are easy to cause, the utility model provides a maintainable shield tail quick emergency sealing device which can quickly and emergently seal the leakage of the sealing device, so that the leakage is prevented from spreading, and the serious accidents are caused.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a maintainable shield tail emergent sealing device fast, includes the mount pad, the mount pad evenly sets up on the shield tail inner wall, still includes the inflatable seal circle, the inflatable seal circle encircles the section of jurisdiction, and the inflatable seal circle is provided with the trachea, trachea and air supply intercommunication, inflatable seal's inner circle can with elastic support spare butt, elastic support spare multistage formula structure, elastic support spare includes a plurality of sub-support spare, sub-support spare's stiff end with the mount pad can dismantle the connection, sub-support spare remove the end movably and set up in the supporting seat, the supporting seat sets up at shield tail strengthening ring front end. Can realize emergent sealing after sealing device leaks through inflatable seal circle and elastic support piece, sub-support piece butt extremely eliminates the clearance between section of jurisdiction and the shield tail inner wall on the section of jurisdiction under inflatable seal circle's effect, realizes interim emergent shutoff, avoids the mud of seepage entering to continue the seepage to spread to shield structure built-in.

Further, the supporting seat is of an annular structure, the connecting end of the supporting seat is connected with the front end of the shield tail reinforcing ring in a welded mode, a sliding groove is formed in the supporting end of the supporting seat, the moving end can move in the sliding groove, and the groove wall of the sliding groove, which is far away from the inflatable sealing ring, extends out of the supporting end. The support can be realized through the support seat, and the elastic support piece is prevented from being separated from the support seat after being deformed, so that the deformation of the elastic support piece is not influenced.

Further, the mount pad is annular structure, mount pad and shield tail inner wall welded connection, the mount pad level is provided with the installation screw, be provided with the bolt in the installation screw, the stiff end is L type structure, the stiff end is provided with the connecting hole, the connecting hole with the coaxial setting of installation screw. The horizontal installation can reduce the labor intensity of installing the elastic support piece, and is convenient to disassemble and assemble.

Further, at least two air pipes are arranged, and the air pipes are uniformly distributed. The uniform deformation of the inflatable sealing ring is facilitated through the plurality of air pipes.

Further, a pressure gauge is arranged on the air pipe. The internal pressure of the inflatable sealing ring is observed through the pressure gauge, so that insufficient pressure or overlarge pressure is avoided.

Further, the thickness of the inflated sealing ring is a, and the theoretical distance between the shield tail and the duct piece is b, which is not less than 1.5b. Ensure that the inflatable sealing ring is effectively plugged, and reduce mud spreading.

Further, the sub-support member adopts a spring piece. Can provide stronger holding power for inflatable seal circle, make simultaneously convenient, reduction in production cost.

From the above technical scheme, the utility model has the following advantages:

the scheme provides a quick emergent sealing device of shield tail, can realize emergent sealing after sealing device leaks through inflatable seal circle and elastic support piece, and sub-support piece butt extremely eliminates the clearance between section of jurisdiction and the shield tail inner wall on the section of jurisdiction under inflatable seal circle's effect, realizes interim emergent shutoff, avoids the mud that the seepage advances to continue the seepage to spread to shield machine; the support can be realized through the support seat, and the elastic support piece is prevented from being separated from the support seat after being deformed; the labor intensity of installing the elastic support piece can be reduced by adopting horizontal installation, and the assembly and the disassembly are convenient; observing the internal pressure of the inflatable sealing ring through a pressure gauge, so as to avoid insufficient or overlarge pressure; the spring piece is adopted as the sub-support piece, so that stronger supporting force can be provided for the inflatable sealing ring, meanwhile, the inflatable sealing ring is convenient to manufacture, and the production cost is reduced; each ring of tunneling can be checked and maintained, so that the device is always in an intact state, and the dangerous situation can be responded quickly; can be reused, and reinstalled for the next use after the dangerous case is released.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an assembly structure of a shield tail and shield tail reinforcing ring according to an embodiment of the present utility model.

Fig. 2 is an enlarged view at Y in fig. 1.

Fig. 3 is a schematic structural view of a sub-support in an embodiment of the present utility model.

In the figure, 1, an inflatable sealing ring, 2, an air pipe, 3, a mounting seat, 4, a bolt, 5, a sub-supporting piece, 501, a moving end, 502, a fixed end, 503, a connecting hole, 6, a supporting seat, 7, a duct piece, 8, a shield tail reinforcing ring, 9, a shield tail, 10 and a sealing device.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.

The inventor finds that in the existing shield tail sealing device, the abrasion of the steel wire tail brush is caused along with long-distance construction, the sealing effect is greatly reduced, the shield tail is difficult to quickly and effectively seal once leakage occurs, and large accidents are easily caused; based on the above, in the embodiment of the utility model, by adding the emergency sealing device, temporary sealing is performed after the sealing device fails, so that slurry is prevented from continuously spreading into the shield machine after penetrating, and the problem that a large accident is easily caused after the tail of the shield leaks in the prior art is solved.

As shown in fig. 1 to 2, this embodiment provides a rapid emergency sealing device for a shield tail, including a mounting seat 3, an inflatable sealing ring 1, an elastic supporting member and a supporting seat 6, where the mounting seat 3 is uniformly disposed on the inner wall of the shield tail 9, and further includes the inflatable sealing ring 1, the inflatable sealing ring 1 surrounds a segment 7, the inflatable sealing ring 1 is provided with an air pipe 2, the air pipe 2 is communicated with an air source, a through hole is disposed at a corresponding position of the mounting seat 3, the air pipe 2 can extend from the through hole, the air source is provided with a pressure reducing valve, an inner ring of the inflatable sealing ring 1 can be abutted with the elastic supporting member, the elastic supporting member has a multi-section structure, the elastic supporting member includes a plurality of sub supporting members 5, a fixed end of the sub supporting members 5 is detachably connected with the mounting seat 3, a movable end of the sub supporting member 5 is movably disposed in the supporting seat 6, the supporting seat 6 is disposed at a front end of the shield tail reinforcing ring 8, in this embodiment, the width of the sub elastic member is 20cm, the length is greater than the width of the inflatable sealing ring, and the number thereof is determined according to the inner diameter of the shield tail, and the gap between two adjacent sub supporting members 5 is reduced as much as possible, so as to realize protection of the inflatable sealing ring 5; in order to improve the supporting capacity, the sub-supporting piece 5 is made of a spring piece; can realize emergent sealing after sealing device leaks through inflatable seal circle 1 and elastic support spare, sub-support spare butt extremely eliminates the clearance between section of jurisdiction 7 and the shield tail 9 inner wall on section of jurisdiction 7 under inflatable seal circle 1's effect, realizes interim emergent shutoff, avoids the mud of seepage advance to continue the seepage to spread to shield structure built-in.

As shown in fig. 2 and 3, in order to be able to lift the supporting function of the supporting seat 6 on the elastic supporting member to prevent the supporting seat from falling off after deformation, and at the same time, the inflatable sealing ring 1 cannot be influenced to push out the elastic supporting member, the supporting seat 6 is in a ring structure, the supporting seat 6 surrounds the duct piece 7, the connecting end of the supporting seat 6 is welded with the front end of the shield tail reinforcing ring 8, the supporting end of the supporting seat 6 is provided with a sliding groove, the moving end 501 of the sub supporting member 5 can move in the sliding groove, and the supporting end is extended from the wall of the sliding groove far away from the inflatable sealing ring 1, in this embodiment, the supporting end is extended by 10mm.

As shown in fig. 2 and 3, for convenient assembly and disassembly of the elastic support, the mounting seat 3 is of a ring structure, the outer circumferential surface of the mounting seat 3 surrounds the duct piece 7 and is welded with the inner wall of the shield tail 9, the mounting seat 3 is horizontally provided with a mounting screw hole, a bolt 4 is arranged in the mounting screw hole, the fixed end is of an L-shaped structure, the fixed end 502 of the sub-support 5 is provided with a connecting hole 503, the connecting hole 503 is coaxially arranged with the mounting screw hole, and when the elastic support is assembled and disassembled through the sample, an operator looks at the mounting seat 3 and the elastic support in a head-up manner without looking up, so that the fatigue strength is reduced.

Because shield tail 9 inner wall diameter is great, in order to realize the even deformation of inflatable seal circle 1, trachea 2 is provided with two at least, and trachea 2 evenly distributed, in this embodiment, trachea 2 is provided with two places.

In order to facilitate observation of the pressure condition in the inflatable sealing ring 1, poor sealing effect caused by insufficient pressure is prevented, and meanwhile, the pressure is prevented from exceeding the rated pressure of the inflatable sealing ring 1 too much, and the pressure gauge is arranged on the air pipe 2, so that the pressure in the inflatable sealing ring 1 can be intuitively seen; in this embodiment, the working pressure of the inflatable sealing ring 1 is 6bar.

In order to ensure effective blocking, the thickness of the inflated sealing ring 1 is a, the theoretical distance between the shield tail 9 and the duct piece 7 is b, the a is not less than 1.5b, the inflated sealing ring 1 is ensured to be blocked effectively, and the mud spreading is reduced.

The installation and working process of the rapid emergency sealing device for the shield tail 9 are as follows:

firstly, a supporting seat 6 is welded at the front end of a shield tail reinforcing ring 8, a mounting seat 3 is welded on the inner wall of a shield tail 9, an inflatable sealing ring 1 is put in, and sub-supporting pieces 5 are mounted block by block; the air pipes 2 are respectively communicated with an air source; when the sealing device 10 fails, an emergency sealing device is required to be started, a pressure reducing valve is opened, and the inflatable sealing ring 1 is inflated until the pressure gauge number reaches 6bar; and after the dangerous case is released, the pressure is released and the industrial gas is discharged.

During use of the device, regular inspection is performed in order to replace worn sub-supports 5 in time.

From the above detailed description, it can be seen that the present utility model has the following advantages:

1. the emergency sealing can be realized after the sealing device is leaked through the inflatable sealing ring 1 and the elastic supporting piece, the elastic supporting piece is abutted on the pipe piece 7 under the action of the inflatable sealing ring 1, so that the gap between the pipe piece 7 and the inner wall of the shield tail 9 is greatly eliminated, temporary emergency blocking is realized, and the leaked mud is prevented from continuing to leak and spread into the shield machine;

2. the support can be realized through the support seat 6, and the elastic support piece is prevented from being separated from the support seat 6 after being deformed;

3. the installation seat 3 is horizontally installed, so that the labor intensity of installing the elastic support piece can be reduced, and the installation seat is convenient to disassemble and assemble;

4. the pressure inside the inflatable sealing ring 1 is observed through the pressure appearance, so that insufficient pressure or overlarge pressure is avoided;

5. by adopting the spring piece as the sub-supporting piece 5, stronger supporting force can be provided for the inflatable sealing ring 1, meanwhile, the inflatable sealing ring is convenient to manufacture, and the production cost is reduced.

The terms "upper," "lower," "outboard," "inboard," and the like in the description and in the claims of the utility model and in the above figures, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. The utility model provides a quick emergent sealing device of shield tail, including mount pad (3), mount pad (3) set up on the shield tail inner wall, a serial communication port, still include inflatable seal circle (1), inflatable seal circle (1) encircle the section of jurisdiction, inflatable seal circle (1) are provided with trachea (2), trachea (2) and air supply intercommunication, the inner circle of inflatable seal circle (1) can with elastic support piece butt, elastic support piece multistage formula structure, elastic support piece includes a plurality of sub-support piece (5), the stiff end and the mount pad (3) of sub-support piece (5) can dismantle the connection, the removal end of sub-support piece (5) movably sets up in supporting seat (6), supporting seat (6) set up at shield tail strengthening ring front end.

2. The rapid emergency sealing device for the shield tail according to claim 1, wherein the supporting seat (6) is of an annular structure, the connecting end of the supporting seat (6) is welded with the front end of the shield tail reinforcing ring, the supporting end of the supporting seat (6) is provided with a sliding groove, the moving end (501) can move in the sliding groove, and the supporting end extends out of the groove wall of the sliding groove far away from the inflatable sealing ring (1).

3. The rapid emergency sealing device for the shield tail according to claim 2, wherein the mounting seat (3) is of an annular structure, the mounting seat (3) is connected with the inner wall of the shield tail in a welded mode, the mounting seat (3) is horizontally provided with a mounting screw hole, a bolt (4) is arranged in the mounting screw hole, the fixed end (502) of the sub-supporting piece (5) is of an L-shaped structure, the fixed end (502) is provided with a connecting hole (503), and the connecting hole (503) is coaxially arranged with the mounting screw hole.

4. A shield tail rapid emergency sealing device according to claim 1, characterized in that at least two air pipes (2) are provided, the air pipes (2) being evenly distributed.

5. A shield tail quick emergency sealing device according to claim 4, characterized in that a pressure gauge is arranged on the air pipe (2).

6. The rapid emergency sealing device for the shield tail according to claim 1, wherein the thickness of the inflated sealing ring (1) is a, the theoretical distance between the shield tail and the duct piece is b, and the a is not less than 1.5b.

7. A shield tail quick emergency seal according to claim 1, wherein the sub-support (5) is a leaf spring.