CN210221425U - Experimental device for be used for shield to construct tail brush sealing performance test - Google Patents
Experimental device for be used for shield to construct tail brush sealing performance test Download PDFInfo
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- CN210221425U CN210221425U CN201921472946.2U CN201921472946U CN210221425U CN 210221425 U CN210221425 U CN 210221425U CN 201921472946 U CN201921472946 U CN 201921472946U CN 210221425 U CN210221425 U CN 210221425U
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Abstract
The utility model provides an experimental device for be used for shield to construct tail brush sealing performance test, including the box support, the box support is connected with sealed box, and sealed box is connected and sealed box and adjustment mechanism and apron form a closed detection space through adjustment mechanism and apron, including observing chamber, the sealed chamber of grease and pressurization chamber in the closed detection space, the sealed chamber of grease is linked together with the grease pipeline, and the pressurization chamber is linked together with the pressurized water pipeline, and the sealed chamber of grease and the pressurization intracavity all are equipped with fiber grating pressure sensor. The utility model discloses overall structure design is simple, carries out the sealing ability under the different clearance condition through simulation shield tail seal chamber and tests, and the risk judgement for follow-up early warning system provides data support.
Description
Technical Field
The utility model relates to a shield tail sealing performance test's technical field especially relates to an experimental apparatus for be used for shield tail sealing performance test of shield.
Background
The shield tunnel forming technology is a modern forming technology for completing tunnel excavation by utilizing a large tunnel boring machine integrating various engineering operations such as excavation, supporting, propelling, lining cutting and the like. In the tunneling process of the shield tunneling machine, a gap (within 200 mm) with a certain size is formed between a tail shield support and a tunnel lining cutting structure (segment), and the gap is communicated with a tunnel soil layer with a certain pressure and a safety space in a shield body, so that a corresponding sealing device is needed for separating. At present, most shield machines adopt a sealing structure of smearing shield tail sealing grease by a steel wire brush to achieve the purpose of tail shield sealing. Due to the inherent defects of complex underground environment and sealing structure form, the shield machine inevitably generates construction risks such as water leakage, mud leakage, slurry leakage and the like in the tunneling process, and in order to make early warning judgment on the risks, the sealing capability of the shield tail sealing cavity under different clearance conditions in the circumferential direction needs to be tested in a relevant manner, so that data support is provided for the risk judgment of a follow-up early warning system.
At present, an experimental device for testing the pressure in a shield tail seal cavity is disclosed in a patent application number of 'CN201721264624. X' with a patent name of 'a shield tail brush sealing performance testing device', the experimental device is complex in structural design, and the changeable height of a cavity gap depends on the compressible amount of a flexible seal, so that the changeable gap is limited, the pressure which can be borne by the flexible seal is limited, and the sealing capacity of a tail brush under a high-pressure condition cannot be tested.
SUMMERY OF THE UTILITY MODEL
The sealing ability to need shield tail seal chamber under different clearance conditions tests, and the technical problem that provides data support is judged for follow-up early warning system's risk, the utility model provides an experimental apparatus for shield constructs tail brush sealing performance test.
In order to achieve the above purpose, the technical solution of the present invention is realized as follows:
the utility model provides an experimental apparatus for be used for shield structure tail-brush sealing performance test, including the box support, the box support is connected with sealed box, sealed box is connected with the apron and forms a closed detection space between sealed box and the apron, including observing the chamber in the closed detection space, the sealed chamber of grease and pressurization chamber, the sealed chamber of grease is linked together with the grease pipeline, the pressurization chamber is linked together with the pressurization water pipeline, the sealed chamber of grease and the intracavity that pressurizes all are equipped with fiber grating pressure sensor, it is more accurate to utilize fiber grating pressure sensor to survey pressure data.
Preferably, the sealed box body is connected with the cover plate through the adjusting mechanism, and a sealed detection space is formed between the sealed box body and the adjusting mechanism as well as between the sealed box body and the cover plate, so that subsequent pressure detection is facilitated.
Preferably, adjustment mechanism includes a plurality of backing plate and backing plate thickness diverse, adjusts the grease intracavity height through different backing plates, simple structure, and the backing plate passes through the bolt and is connected with apron and seal box body respectively.
Preferably, a connecting flange is arranged on the sealing box body; the upper surface of backing plate and flange's upper surface all are equipped with the mounting groove, install sealing strip and backing plate in the seal groove and pass through outer sealing strip and inner sealing strip respectively with sealed box and apron sealing connection.
Preferably, a tail brush welding bottom plate is arranged in the sealing box body, a plurality of positioning blocks are arranged on the tail brush welding bottom plate, a shield tail brush is fixed on one side of each positioning block and on the tail brush welding bottom plate, an observation cavity is formed between the shield tail brush at the head end and the cover plate as well as between the adjacent shield tail brushes and the sealing box body, and a pressure cavity is formed between the shield tail brush at the tail end and the cover plate as well as between the shield tail brush at the tail end and the sealing box body; the fiber bragg grating pressure sensor is arranged on the tail brush welding bottom plate.
Preferably, a plurality of wire outlets are formed in the side face of the sealed box body, and a signal wire of the fiber grating pressure sensor penetrates out of the wire outlets through the waterproof connector.
Preferably, a grease inlet hole and an observation hole are formed in the grease sealing cavity, and the grease inlet hole is communicated with a grease pipeline; and a high-pressure water inlet hole and an observation hole are arranged in the pressurizing cavity, and the high-pressure water inlet hole is communicated with an external pressurized water pipeline.
Preferably, the grease inlet hole, the observation hole in the grease sealing cavity and the high-pressure water inlet hole are through holes penetrating through the tail brush welding bottom plate and the sealing box body; the pressurization intracavity observation hole sets up the through-hole in sealed box side, all is equipped with the external ball valve on oil feed grease hole, the sealed intracavity observation hole of grease and the pressurization intracavity observation hole, and the oil feed grease hole is linked together through external ball valve and grease pipeline.
The utility model has the advantages that: the utility model discloses a fiber grating pressure sensor can accurately survey the grease intracavity and pressurize intracavity pressure situation of change, and the effectual seal capacity who measures three tail brushes under different clearance conditions of measuring provides data support for the sealed early warning system of synthesizing of shield tail to adjust each cavity internal clearance height through addding the backing plate of co-altitude not, realize that the seal capacity under the condition of co-altitude not measures.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view of the inside of the hermetic container in fig. 1.
Fig. 3 is a schematic structural view of a lower part of the sealed box body in fig. 1.
In the figure, 1 is a sealed box body, 1-1 is a wire outlet hole, 1-2 is a high-pressure water inlet hole, 1-3 is an oil inlet hole, 1-4 is an observation hole, 2 is a base plate I, 3 is a base plate II, 4 is a cover plate, 5 is a box body support, 6 is an outer sealing strip, 7 is an inner sealing strip, 8 is a tail brush welding bottom plate, 9 is a shield tail brush, and 10 is a fiber grating pressure sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
Example 1: as shown in figure 1, an experimental device for testing the sealing performance of a shield tail brush comprises a box body support 5, the box body support 5 is connected with a sealing box body 1, the sealing box body 1 is connected with a cover plate 4, a closed detection space is formed between the sealing box body 1 and the cover plate 4, the closed detection space is used for conveniently simulating the actual working state of a shield tail sealing cavity, an observation cavity is arranged in the closed detection space, the grease sealing cavity and a pressurization cavity are communicated with a grease pipeline, the pressurization cavity is communicated with a pressurization water pipeline, fiber grating pressure sensors 10 are arranged in the grease sealing cavity and the pressurization cavity, the fiber grating pressure sensors are used for monitoring the pressure change in each cavity in real time, the fiber grating pressure sensors 10 are connected with a control host through optical cables, and the pressure value change in the grease sealing cavity can be conveniently and visually measured.
The sealed box body 1 is connected with the cover plate 4 through the adjusting mechanism, a sealed detection space is formed between the sealed box body 1 and the adjusting mechanism and between the sealed box body 1 and the cover plate 4, and the gap height of the sealed grease cavity and the water adding cavity is changed by the adjusting mechanism.
And backing plate thickness diverse, the backing plate is connected with apron 4 and seal box 1 respectively through the bolt, the utility model discloses a two sets of backing plates, a set of backing plate I2 that is, I thickness 10cm of backing plate, another group is backing plate II 3, and II thicknesses of backing plate are 20cm, and backing plate I and backing plate II can carry out the intercombination and stack and satisfy the utility model discloses to the requirement in different thickness airtight spaces, the through-hole has been seted up to corresponding position on box, backing plate and the apron, utilize the bolt with apron, backing plate and seal box even as an organic whole guarantee to experiment required leakproofness, the interval of bolt should be less than 20cm in order to guarantee the leakproofness.
The sealing box body 1 is provided with a connecting flange; the upper surface of backing plate and flange's upper surface all are equipped with the seal groove, install the sealing strip in the seal groove, the utility model discloses well adoption twice seal groove to satisfy in this experiment to the requirement of sealing capacity and backing plate pass through outer seal strip 6 and inner seal strip 7 respectively with sealed box 1 and apron 4 sealing connection, guarantee the leakproofness at each interface.
As shown in FIG. 2, a tail brush welding bottom plate 8 is arranged in a seal box body 1, through hole structures with the same size are processed at corresponding positions of the tail brush welding bottom plate and a hole on the seal box body, so that subsequent grease pipelines and high-pressure water pipelines can be conveniently installed, a shield tail brush welding process is utilized to weld a tail brush 9 to one side of a positioning block on the tail brush welding bottom plate, the tail brush welding bottom plate is utilized to conveniently replace the tail brush, a plurality of positioning blocks are arranged on the tail brush welding bottom plate 8, the number of the positioning blocks is three, a shield tail brush 9 is fixed on one side of the positioning blocks and on the tail brush welding bottom plate 8, the shield tail brush is conveniently and quickly welded by the positioning blocks, the upper part of the shield tail brush is tightly attached to the inner surface of a cover plate, the lower part of the shield tail brush is tightly attached to the seal box body, seal grease is filled among brush hairs, an observation cavity is formed among the tail brush 9 at the head end, a pressurizing cavity is formed between the tail shield brush 9 at the tail end and the cover plate 4 and the seal box body 1, the pressurizing cavity is used for providing pressure for the seal grease cavity, the actual working state of the tail shield cavity is convenient to simulate, two seal grease cavities are formed among the three groups of tail shield brushes, an observation cavity is formed between the tail shield brush at the head end and the seal box body, and the pressurizing cavity is formed between the tail shield brush at the tail end and the seal box body; the fiber bragg grating pressure sensor 10 is installed on the tail brush welding bottom plate 8.
The side surface of the sealed box body 1 is provided with a plurality of wire outlet holes 1-1, a signal wire of the fiber bragg grating pressure sensor 10 penetrates out of the wire outlet holes 1-1 through a waterproof joint, the waterproof joint is utilized to carry out waterproof treatment on the signal wire, and the signal wire adopts an optical cable.
As shown in fig. 3, a grease inlet hole 1-3 and an observation hole are arranged in the grease sealing cavity, the observation hole is arranged at one side of the grease inlet hole, and the grease inlet hole 1-3 is communicated with a grease pipeline; the high-pressure water inlet 1-2 and the observation hole are arranged in the pressurizing cavity, the high-pressure water inlet 1-2 is communicated with an external pressurizing water pipeline, and industrial dye water is adopted in the pressurizing water pipeline to simulate slurry under real working conditions, so that observation is facilitated.
The grease inlet hole 1-3, the observation hole in the grease sealing cavity and the high-pressure water inlet hole 1-2 are through holes which penetrate through the tail brush welding bottom plate 8 and the sealing box body 1; the pressurization intracavity observation hole is arranged in the through hole on the side face of the sealed box body 1, the grease inlet hole 1-3, the grease sealed intracavity observation hole and the pressurization intracavity observation hole are respectively provided with an external ball valve, the external ball valve is a manual ball valve, the external ball valve on the grease sealed intracavity observation hole is mainly used for facilitating a worker to observe whether grease is full, the external ball valve on the pressurization intracavity observation hole is used for observing leakage conditions, and the grease inlet hole 1-3 is communicated with a grease pipeline through the external ball valve.
Example 2: a working method of an experimental device for testing the sealing performance of a shield tail brush comprises the following steps:
s1, welding the shield tail brush 9 to be tested to one side of a positioning block on a tail brush welding bottom plate 8, then placing the welded tail brush welding bottom plate 8 into a sealed box body 1, and forming an observation cavity, a sealed grease cavity and a pressurizing cavity in the sealed box body 1;
s2, respectively installing the fiber bragg grating sensor 10 in the pressurizing cavity and the sealed grease cavity, and leading out the sensor optical cable from the appearance hole of the box body;
s3, coating hand-coated shield tail sealing grease in the bristles of each shield tail brush 9, connecting a grease pipeline into a grease cavity, and connecting a pressurized water pipeline into a pressurized cavity;
s4, mounting and fixing the cover plate 4 and the sealing box body 1, and ensuring that the gap heights of the sealing cavities are consistent;
and S5, finally, injecting grease into the grease cavity through the grease pump, adding industrial dye water into the pressurizing cavity through the pressurizing tank, continuously adding water into the pressurizing cavity to increase the pressure of the pressurizing cavity after the pressure in the grease cavity reaches a set value until the grease cavity leaks, and recording the pressure value of the grease cavity at the moment.
Example 3: in the step S4, the gap height of each cavity is changed by adding backing plates with different thicknesses between a cover plate 4 and a seal box body 1, so that the requirement of the experiment process on the closed space with different thicknesses is met.
The rest of the working procedure is the same as in example 2.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an experimental apparatus for be used for shield to construct tail brush sealing performance test, a serial communication port, including box support (5), box support (5) are connected with sealed box (1), sealed box (1) are connected with apron (4) and sealed box (1) and apron (4) between form a closed detection space, including observing the chamber in the closed detection space, grease seal chamber and pressurization chamber, grease seal chamber is linked together with the grease pipeline, the pressurization chamber is linked together with the pressurized water pipeline, grease seal chamber and pressurization intracavity all are equipped with fiber grating pressure sensor (10).
2. The experimental device for testing the sealing performance of the shield tail brush according to claim 1, wherein the sealing box body (1) is connected with the cover plate (4) through an adjusting mechanism, and a closed detection space is formed between the sealing box body (1) and the adjusting mechanism as well as between the sealing box body and the cover plate (4).
3. The experimental device for testing the sealing performance of the shield tail brush according to claim 2, wherein the adjusting mechanism comprises a plurality of base plates, the thickness of the base plates is different, and the base plates are respectively connected with the cover plate (4) and the sealing box body (1) through bolts.
4. The experimental device for testing the sealing performance of the shield tail brush according to claim 3, wherein a connecting flange is arranged on the sealing box body (1); the upper surface of backing plate and flange's upper surface all are equipped with the seal groove, install sealing strip and backing plate in the seal groove and pass through outer sealing strip (6) and inner sealing strip (7) respectively with sealed box (1) and apron (4) sealing connection.
5. The experimental device for testing the sealing performance of the shield tail brush according to claim 1, wherein a tail brush welding bottom plate (8) is arranged in the seal box body (1), a plurality of positioning blocks are arranged on the tail brush welding bottom plate (8), the shield tail brush (9) is fixed on one side of each positioning block and on the upper portion of the tail brush welding bottom plate (8), an observation cavity is formed between the shield tail brush (9) at the head end and the cover plate (4) as well as between the adjacent shield tail brushes (9) and the cover plate (4) as well as between the adjacent shield tail brushes (1) and the seal box body (1), a grease sealing cavity is formed between the shield tail brush (9) at the tail end and the cover plate (4) as well as between the shield tail brush (9) at the tail end and the seal box body (1; the fiber bragg grating pressure sensor (10) is installed on the tail brush welding bottom plate (8).
6. The experimental device for testing the sealing performance of the shield tail brush according to claim 1 or 5, wherein a plurality of wire outlet holes (1-1) are formed in the side surface of the sealing box body (1), and a signal wire of the fiber grating pressure sensor (10) penetrates out of the wire outlet holes (1-1) through a waterproof joint.
7. The experimental device for testing the sealing performance of the shield tail brush according to claim 5, wherein a grease inlet hole (1-3) and an observation hole are formed in the grease sealing cavity, and the grease inlet hole (1-3) is communicated with a grease pipeline; the pressurizing cavity is internally provided with a high-pressure water inlet hole (1-2) and an observation hole, and the high-pressure water inlet hole (1-2) is communicated with an external pressurized water pipeline.
8. The experimental device for testing the sealing performance of the shield tail brush according to claim 7, wherein the grease inlet hole (1-3), the observation hole in the grease sealing cavity and the high-pressure water inlet hole (1-2) are through holes penetrating through a tail brush welding bottom plate (8) and a sealing box body (1); the pressurization cavity inner observation hole is formed in a through hole in the side face of the sealing box body (1), the oil inlet grease hole (1-3), the oil sealing cavity inner observation hole and the pressurization cavity inner observation hole are respectively provided with an external ball valve, and the oil inlet grease hole (1-3) is communicated with the oil pipeline through the external ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921472946.2U CN210221425U (en) | 2019-09-05 | 2019-09-05 | Experimental device for be used for shield to construct tail brush sealing performance test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921472946.2U CN210221425U (en) | 2019-09-05 | 2019-09-05 | Experimental device for be used for shield to construct tail brush sealing performance test |
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| Publication Number | Publication Date |
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| CN210221425U true CN210221425U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921472946.2U Active CN210221425U (en) | 2019-09-05 | 2019-09-05 | Experimental device for be used for shield to construct tail brush sealing performance test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811853A (en) * | 2020-06-30 | 2020-10-23 | 上海隧道工程有限公司 | Shield tail brush performance testing device and testing method thereof |
| CN111811799A (en) * | 2020-06-30 | 2020-10-23 | 上海隧道工程有限公司 | Grease metering device for shield tail brush and grease metering method thereof |
-
2019
- 2019-09-05 CN CN201921472946.2U patent/CN210221425U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811853A (en) * | 2020-06-30 | 2020-10-23 | 上海隧道工程有限公司 | Shield tail brush performance testing device and testing method thereof |
| CN111811799A (en) * | 2020-06-30 | 2020-10-23 | 上海隧道工程有限公司 | Grease metering device for shield tail brush and grease metering method thereof |
| CN111811799B (en) * | 2020-06-30 | 2023-04-14 | 上海隧道工程有限公司 | Grease metering device for shield tail brush and grease metering method thereof |
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