CN220037436U - Shield bottom sealing device of pneumatic sinking cabinet - Google Patents
Shield bottom sealing device of pneumatic sinking cabinet Download PDFInfo
- Publication number
- CN220037436U CN220037436U CN202321100638.3U CN202321100638U CN220037436U CN 220037436 U CN220037436 U CN 220037436U CN 202321100638 U CN202321100638 U CN 202321100638U CN 220037436 U CN220037436 U CN 220037436U
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- sealing
- shield
- sealing rubber
- shield bottom
- joint strip
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
Abstract
The shield bottom sealing device of the pneumatic sinking cabinet comprises a shield bottom, wherein an annular sealing mechanism is arranged on the bottom surface of the shield bottom; the sealing mechanism comprises a sealing rubber strip, a folding water bag is arranged above the sealing rubber strip, a water filling pipe is arranged at the top of the folding water bag, and the water filling pipe stretches into the side wall of the shield bottom and is connected with water injection equipment. Be equipped with the base plate on the shield bottom surface, be equipped with joint strip mount pad on the base plate, joint strip installs in joint strip mount pad, and joint strip bottom is stretched out by joint strip mount pad bottom, and joint strip can follow vertical direction and remove in the joint strip mount pad. The utility model adopts the structure, effectively solves the problem of abrasion of the sealing ring in the prior art, and provides favorable conditions for underwater overhaul and repair operation.
Description
Technical Field
The utility model relates to the technical field of underwater repair construction of hydropower stations, in particular to a shield bottom sealing device of an air pressure sinking cabinet.
Background
The concrete structure maintenance of the underwater guard bottom plate of the hydropower station is currently carried out through the submerged cabinet, after the submerged cabinet is installed in place, after sealed drainage is carried out, personnel descend into the shield bottom to carry out maintenance operation, because the operation position is positioned underwater, the shield bottom self structure is an opening due to the bottom, after drainage, effective sealing between the bottom surface of the shield bottom of the submerged cabinet and the overflow surface is required to be ensured, and the external water flow is prevented from entering the shield bottom to influence the normal maintenance operation.
The prior Chinese patent 'pneumatic sinking cabinet' (application number 200620163305.5) proposes that two sealing rings are adopted, and the skirt edges of the sealing rings are folded and deformed by the gravity of the shield bottom and are attached to the overflow surface to achieve the sealing effect.
However, in the prior art, the sealing ring is repeatedly folded, so that abrasion leakage is caused, in addition, under the normal pressure state, the soft rubber sealing ring is not tightly attached to the dam concrete guard base plate, and external water is permeated into the overhaul bin along with the air flow direction during inflation, so that the underwater overhaul repair condition under the normal pressure state cannot be met.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the shield bottom sealing device of the pneumatic sinking cabinet, effectively solving the problem of abrasion of a sealing ring in the prior art and providing favorable conditions for underwater overhaul and repair operation.
In order to solve the technical problems, the utility model adopts the following technical scheme: the shield bottom sealing device of the pneumatic sinking cabinet comprises a shield bottom, wherein an annular sealing mechanism is arranged on the bottom surface of the shield bottom;
the sealing mechanism comprises a sealing rubber strip, a folding water bag is arranged above the sealing rubber strip, a water filling pipe is arranged at the top of the folding water bag, and the water filling pipe stretches into the side wall of the shield bottom and is connected with water injection equipment.
In the preferred scheme, shield end bottom surface on be equipped with the base plate, be equipped with joint strip mount pad on the base plate, joint strip installs in joint strip mount pad, joint strip bottom is stretched out by joint strip mount pad bottom, joint strip can follow vertical direction and remove in the joint strip mount pad.
In the preferred scheme, the folding water bag is arranged in a gap between the sealing rubber strip and the base plate.
In the preferred scheme, a first cavity is arranged in the sealing rubber strip, the first cavity is an annular cavity, and at least one annular second cavity is arranged in the sealing rubber strip above the first cavity.
In the preferred scheme, the sealing rubber strip mounting seat is internally provided with two mounting grooves, one sealing rubber strip is respectively mounted in the two mounting grooves, an air chamber is formed between the parts, extending out of the bottom of the sealing rubber strip mounting seat, of the two sealing rubber strips, the sealing rubber strip mounting seat is provided with an air charging pipe connected with the air chamber, and the air charging pipe upwards penetrates through the base plate, extends into the side wall of the shield bottom and is connected with air injection equipment.
In the preferred scheme, the shield bottom is provided with supporting legs which are telescopic structures.
The shield bottom sealing device of the pneumatic sinking cabinet provided by the utility model has the following beneficial effects by adopting the structure:
(1) The supporting leg structure is added, and the sealing strip is adjusted according to the rubber material, so that the premature failure of the sealing strip is avoided;
(2) The air chamber can further prevent water from entering the shield bottom, and is helpful for improving the overhaul environment of shield bottom workers;
(3) The cavity formed in the sealing strip can provide larger depth compensation, and when pits exist, the pits and the surrounding plane positions are ensured to be well sealed;
(4) The air chamber forms a shield bottom seal, so that the shield bottom is in a non-water environment and can be in a normal pressure state, and the influence of high pressure on staff is reduced.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic diagram of the overall structure of the present utility model.
FIG. 2 is a schematic view of the structure of the present utility model when a single pass sealing strip is used.
Fig. 3 is a schematic top view of the present utility model using two sealing strips.
In the figure: the shield bottom 1, supporting legs 2, sealing mechanism 3, base plate 4, joint strip mount pad 5, joint strip 6, first cavity 601, second cavity 602, folding water pocket 7, charge pipe 8, charge pipe 9, air chamber 10.
Detailed Description
As shown in fig. 1-3, a shield bottom sealing device of an air pressure sinking cabinet comprises a shield bottom 1, wherein an annular sealing mechanism 3 is arranged on the bottom surface of the shield bottom 1;
the sealing mechanism 3 comprises a sealing rubber strip 6, a folding water bag 7 is arranged above the sealing rubber strip 6, a water filling pipe 8 is arranged at the top of the folding water bag 7, and the water filling pipe 8 stretches into the side wall of the shield bottom 1 and is connected with water injection equipment.
In the preferred scheme, shield end 1 bottom surface on be equipped with base plate 4, be equipped with joint strip mount pad 5 on the base plate 4, joint strip 6 installs in joint strip mount pad 5, joint strip 6 bottom is stretched out by joint strip mount pad 5 bottom, joint strip 6 can follow vertical direction and remove in joint strip mount pad 5.
In a preferred scheme, the folding water bag 7 is arranged in a gap between the sealing rubber strip 6 and the base plate 4.
In the preferred scheme, a first cavity 601 is arranged in the sealing rubber strip 6, the first cavity 601 is an annular cavity, and at least one annular second cavity 602 is arranged in the sealing rubber strip 6 above the first cavity 601.
In the preferred scheme, the sealing rubber strip mounting seat 5 is internally provided with two mounting grooves, one sealing rubber strip 6 is respectively mounted in the two mounting grooves, an air chamber 10 is formed between the parts, extending out of the bottom of the sealing rubber strip mounting seat 5, of the two sealing rubber strips 6, the sealing rubber strip mounting seat 5 is provided with an air charging pipe 9 connected with the air chamber 10, and the air charging pipe 9 upwards penetrates through the base plate 4, extends into the side wall of the shield bottom 1 and is connected with air injection equipment.
In the preferred scheme, the support legs 2 are arranged on the inner side wall of the shield bottom 1, and the support legs 2 are of telescopic structures.
The utility model discloses a shield bottom sealing device of an air pressure sinking cabinet, which comprises a shield bottom sealing device and a shield bottom sealing device, wherein the shield bottom sealing device comprises a shield body and a shield cover body, wherein the shield bottom sealing device comprises a shield cover body, the shield cover body is arranged on the:
and a physical supporting leg 2 is respectively added at the middle positions of the four corners and the long side of the shield bottom of the pneumatic sinking cabinet and is used for supporting all the weight of the shield bottom pneumatic sinking cabinet assembly except the buoyancy tank.
Meanwhile, the height of the physical support leg 2 can be flexibly adjusted, so that the physical support leg is adapted to the rubber hardness of the sealing rubber strip 6, the sealing rubber is ensured to be prevented from being permanently deformed as far as possible within the bearable compression range, and the service life of the sealing rubber is prolonged.
The sealing mode is designed into a combined sealing mode of two folding water bags 7 and sealing rubber strips 6, the folding water bags 7 are filled with water and are downwards ejected out of the sealing rubber strips 6 to press the sealing surface, an inflatable air chamber 10 is formed between the two combined sealing modes, when the air pressure of the pressurized air chamber is higher than the water pressure outside the shield bottom, water can be prevented from entering the shield bottom, and the inside of the shield bottom can be always in a normal pressure state.
In this solution, the maximum pit compensation depth of the contact surface is closely related to the cross-sectional shape and size of the sealing rubber, and the depth compensation range of the sealing rubber strip 6 is increased by adopting a mode of designing the first cavity 601 and the second cavity 602 in the sealing rubber strip 6.
After the combination of the shield bottom pneumatic sinking cabinet is completed, the combination body is moved to an operation position, a sand washing system in the shield bottom is started to clean an operation surface before the shield bottom is seated, then the combination body is seated after the inspection is completed, and the folding water bag 7 is filled with water to be unfolded and pushed out to enable the sealing rubber strip 6 to block the inside and the outside of the shield bottom to achieve a basically watertight state.
The folding water bag 7 combines the sealed design scheme of air chamber 10, can make shield end sealing performance improve by a wide margin, still help improving shield end staff's maintenance environment, after the whole drainage of shield end river water, form inflatable pressurization air chamber through between two sets of sealing rubber, seal shield end all around, make the shield end not only can be in anhydrous environment but also can make the shield end be in the normal pressure state simultaneously, reduce the influence of high pressure to the staff.
In addition, the volume of the pressurizing air chamber is greatly reduced, so that the use amount of high-pressure air can be greatly reduced during operation, and the energy consumption is effectively saved.
In the process of completing the operation and before the shield bottom is shifted, the negative pressure treatment of vacuumizing is needed to be carried out on the folding water bag 7, water in the folding water bag 7 is drained, the pushed sealing rubber strip 6 is returned into the sealing rubber strip mounting seat 5 under the action of water pressure outside the shield bottom, and the shield bottom sealing is released.
Claims (6)
1. The utility model provides a sealing device at bottom of pneumatic sinking cabinet shield, includes shield end (1), its characterized in that: the bottom surface of the shield bottom (1) is provided with an annular sealing mechanism (3);
the sealing mechanism (3) comprises a sealing rubber strip (6), a folding water bag (7) is arranged above the sealing rubber strip (6), a water filling pipe (8) is arranged at the top of the folding water bag (7), and the water filling pipe (8) stretches into the side wall of the shield bottom (1) and is connected with water injection equipment.
2. The pneumatic sink cabinet shield bottom sealing device according to claim 1, wherein: the shield bottom (1) bottom on be equipped with base plate (4), be equipped with joint strip mount pad (5) on base plate (4), joint strip (6) are installed in joint strip mount pad (5), joint strip (6) bottom is stretched out by joint strip mount pad (5) bottom, joint strip (6) can follow vertical direction in joint strip mount pad (5).
3. The pneumatic sink cabinet shield bottom sealing device according to claim 2, wherein: the folding water bag (7) is arranged in a gap between the sealing rubber strip (6) and the base plate (4).
4. The pneumatic sink cabinet shield bottom sealing device according to claim 1, wherein: a first cavity (601) is arranged in the sealing rubber strip (6), the first cavity (601) is an annular cavity, and at least one annular second cavity (602) is arranged in the sealing rubber strip (6) above the first cavity (601).
5. The pneumatic sink cabinet shield bottom sealing device according to claim 2, wherein: the sealing rubber strip mounting seat (5) in be equipped with twice mounting groove, install one sealing rubber strip (6) respectively in twice mounting groove, form air chamber (10) between the part that two sealing rubber strips (6) stretched out sealing rubber strip mount pad (5) bottom, be equipped with gas tube (9) of connecting air chamber (10) on sealing rubber strip mount pad (5), gas tube (9) upwards pass base plate (4) and stretch into shield end (1) lateral wall in and be connected with the gas injection equipment.
6. The air pressure sink cabinet shield bottom sealing device according to any one of claims 1-5, wherein: the inner side wall of the shield bottom (1) is provided with supporting legs (2), and the supporting legs (2) are of telescopic structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321100638.3U CN220037436U (en) | 2023-05-09 | 2023-05-09 | Shield bottom sealing device of pneumatic sinking cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321100638.3U CN220037436U (en) | 2023-05-09 | 2023-05-09 | Shield bottom sealing device of pneumatic sinking cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220037436U true CN220037436U (en) | 2023-11-17 |
Family
ID=88727968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321100638.3U Active CN220037436U (en) | 2023-05-09 | 2023-05-09 | Shield bottom sealing device of pneumatic sinking cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220037436U (en) |
-
2023
- 2023-05-09 CN CN202321100638.3U patent/CN220037436U/en active Active
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