CN111811853A - Shield tail brush performance testing device and testing method thereof - Google Patents
Shield tail brush performance testing device and testing method thereof Download PDFInfo
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- CN111811853A CN111811853A CN202010614519.4A CN202010614519A CN111811853A CN 111811853 A CN111811853 A CN 111811853A CN 202010614519 A CN202010614519 A CN 202010614519A CN 111811853 A CN111811853 A CN 111811853A
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- shield tail
- grease
- tail brush
- shield
- muddy water
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- 238000012360 testing method Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 129
- 239000004519 grease Substances 0.000 claims abstract description 119
- 238000007789 sealing Methods 0.000 claims abstract description 91
- 239000000945 filler Substances 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 37
- 239000007924 injection Substances 0.000 claims description 37
- 230000005641 tunneling Effects 0.000 claims description 13
- 238000013519 translation Methods 0.000 claims description 12
- 230000010354 integration Effects 0.000 claims description 9
- 239000012466 permeate Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 9
- 239000011797 cavity material Substances 0.000 description 79
- 238000010586 diagram Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0635—Tail sealing means, e.g. used as end shuttering
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a shield tail brush performance testing device and a testing method thereof, wherein the device comprises: a case provided with an upper opening end; the upper sealing plate is arranged in the upper opening end in a lifting way; and three shield tail brushes that await measuring that the syntropy set up, its bottom plate is installed in the bottom of last shrouding, three shield tail brushes that await measuring set up along the length direction interval of box, each shield tail brush that awaits measuring sets up along the width direction of box, the inside wall in the box is fitted in to the both sides of shield tail brush that awaits measuring, the bottom elasticity of the back protection shield of shield tail brush that awaits measuring is pressed and is descended in the bottom of box, form sealed grease chamber between two adjacent back protection shields, form sealed muddy water chamber between the inside wall of first back protection shield and box, the oil filler point that feeds through in the grease chamber and the water filling hole that feeds through in the muddy water chamber are seted up to the box. The invention solves the problem that the selection of the shield tail brush depends on experience and has greater risk to engineering construction.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a shield tail brush performance testing device and a testing method thereof.
Background
The shield tail brush is a sealing element which is arranged at the inner ring of the tail part of the shield machine and plays a role in sealing, is used for preventing the leakage of underground water, slurry and grouting liquid to the shield tail, and plays a vital role in protecting the shield tunneling and the smooth construction of engineering.
If the shield tail brush is selected or used improperly, slurry leakage and seepage of the shield tail can be caused, great cost loss can be caused to engineering construction, and even serious risks can be caused to the engineering construction.
At present, mainstream shield tail brush manufacturers still stay in a mode of selecting by virtue of experience or a mechanical experiment of a single part, the sealing performance of a finished shield tail brush can only be simulated by combining at least three shield tail brushes in a whole circle, and the optimal matching of the shield tail brush cannot be found economically.
Disclosure of Invention
In order to overcome the defects in the prior art, a shield tail brush performance testing device and a testing method thereof are provided so as to solve the problem that engineering construction is relatively risky due to experience of selection of a shield tail brush.
In order to realize above-mentioned purpose, provide a shield tail brush capability test device, include:
the box body is provided with an upper opening end;
the upper sealing plate is used for sealing the upper opening end and is arranged in the upper opening end in a lifting way; and
three shield tail brushes that await measuring that the syntropy set up, three the bottom plate of the shield tail brush that awaits measuring install in go up the bottom of shrouding, three the shield tail brush that awaits measuring is followed the length direction interval of box sets up, each the shield tail brush that awaits measuring is followed the width direction of box sets up, both sides on the width direction of the shield tail brush that awaits measuring are laminated in the inside wall of box, the bottom elasticity of the back protection shield of the shield tail brush that awaits measuring press support in on the bottom of box, adjacent two form sealed grease chamber between the back protection shield of the shield tail brush that awaits measuring, first the back protection shield of the shield tail brush that awaits measuring with form sealed muddy water chamber between the inside wall of box, the box seted up communicate in the oil filler point in grease chamber with communicate in the water injection hole in muddy water chamber.
Furthermore, the box body is also provided with a lower opening end, the lower part of the box body is provided with a socket, the socket can be movably inserted along the length direction of the box body to form a lower sealing plate for sealing the lower opening end, and the bottom of the rear protective plate is elastically pressed on the lower sealing plate.
Further, still include seal assembly, the box with go up the shrouding, down the shrouding reaches install respectively between the shield tail brush that awaits measuring seal assembly.
Further, the lateral wall of the relative both sides of box is vertical installs jacking cylinder, two jacking cylinder's flexible end extends the top of box and be connected with the supporting crossbeam, the supporting crossbeam is connected with the jib, the jib extends in the upper end and connect in the top of going up the shrouding.
Furthermore, the oil injection hole is connected with an oil injection device.
Furthermore, the water injection hole is connected with a water injection device.
Furthermore, the box body is erected on an integration platform, and the water injection device and the oil injection device are integrally installed on the integration platform.
Furthermore, the outside fixed mounting of box has two locating plates, two the locating plate sets up relatively, the perforation has been seted up to the locating plate, lower shrouding movably wears to locate in the perforation.
Further, install the translation hydro-cylinder on the integrated platform, the translation hydro-cylinder is followed the length direction of box sets up, the flexible end of translation hydro-cylinder connect in the shrouding down.
The invention provides a method for testing the performance of a shield tail brush, which comprises the following steps:
lifting the upper sealing plate to enable the distance between the upper sealing plate and the bottom of the box body to be equal to the actual distance between a shield tail of the shield tunneling machine and the duct piece;
injecting grease into a first grease cavity adjacent to the muddy water cavity through the grease injection hole until the grease breaks through the first shield tail brush to be tested forward and permeates into the muddy water cavity;
when the grease breaks through a first shield tail brush to be detected forward, detecting the grease pressure in the first grease cavity to obtain the grease initial pressure of the shield tail brush to be detected;
after the initial grease pressure is obtained through detection, water is injected into the muddy water cavity through a water injection hole, so that the muddy water pressure in the muddy water cavity reaches the initial muddy water pressure, and the initial muddy water pressure is smaller than the initial grease pressure;
after the muddy water pressure reaches the muddy water initial pressure, continuing to inject water into the muddy water cavity and injecting grease into the first grease cavity, and always keeping the muddy water pressure lower than the grease pressure by a preset difference value until the water or the grease penetrates through the second shield tail brush to be tested backwards and permeates into the second grease cavity;
and when the water or the grease penetrates backwards through the second shield tail brush to be detected, detecting the grease pressure in the first grease cavity to obtain the maximum bearing capacity of the shield tail brush to be detected.
The shield tail brush performance testing device has the advantages that the shield tail is simulated by the upper sealing plate, the duct piece is simulated at the bottom of the box body, the upper sealing plate is lifted to adjust the gap between the upper sealing plate and the bottom of the box body, the size of the gap between the shield tail and the duct piece is further simulated, the three shield tail brushes to be tested are arranged in the box body to form a sealed muddy water cavity and a sealed grease cavity, water and grease are respectively injected into the muddy water cavity and the grease cavity through the water injection hole and the oil injection hole, and the bearing capacity and the sealing capacity of the shield tail brushes are simulated. Furthermore, water is injected into the muddy water cavity through the water injection hole and is used as pressure muddy water in the tunneling process of the medium simulation shield tunneling machine, the detected tightness of the shield tail brush to be detected is stricter than that of the pressure muddy water, and the performance of the shield tail brush can be accurately detected. The shield tail brush performance testing device can quickly and efficiently detect the performance of a single shield tail brush, provides a theoretical basis for shield tail brush type selection of a shield machine, and avoids high risk brought to engineering construction by empirical type selection. The shield tail brush performance testing device can be used for testing a single shield tail brush, and is economical and efficient in testing and low in testing cost.
Drawings
Fig. 1 is a schematic structural diagram of a shield tail brush performance testing device according to an embodiment of the present invention.
Fig. 2 is a schematic view of an internal structure of the box according to the embodiment of the present invention.
Fig. 3 is a sectional view of a mud cavity of an embodiment of the present invention.
Fig. 4 is a schematic view of a connection node between the third sealing member and the lower sealing plate according to the embodiment of the present invention.
FIG. 5 is a front view of a mud chamber of an embodiment of the present invention.
Fig. 6 is a schematic structural view of a shield tail brush according to an embodiment of the present invention.
Fig. 7 is a schematic view of a state in which the second seal member of the embodiment of the present invention is mounted on the shield tail brush.
FIG. 8 is a cross-sectional view of a second seal according to an embodiment of the present invention.
Fig. 9 is a schematic structural view of the bottom of the upper sealing plate according to the embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Fig. 1 is a schematic structural diagram of a shield tail brush performance testing device according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of an internal structure of a box body according to an embodiment of the present invention (one side of the box body is particularly hidden for clarity of showing an internal structure of the box body), fig. 3 is a cross-sectional view of a muddy water chamber according to an embodiment of the present invention (one side of the box body is subjected to transparentization for clarity of showing a position of a third sealing member), fig. 4 is a schematic connection node diagram of the third sealing member and a lower sealing plate according to an embodiment of the present invention, and fig. 5 is a front view of the muddy water chamber according to an embodiment of the present, fig. 6 is a structural view of a shield tail brush according to an embodiment of the present invention, fig. 7 is a schematic view of a state in which a second sealing member according to an embodiment of the present invention is mounted on the shield tail brush, fig. 8 is a sectional view of the second sealing member according to an embodiment of the present invention, and fig. 9 is a structural view of a bottom portion of an upper sealing plate according to an embodiment of the present invention.
Referring to fig. 1 to 9, the present invention provides a shield tail brush performance testing apparatus, including: the shield tail brush that awaits measuring is brushed to box 11, upper seal plate 12, lower seal plate 13.
The case 11 has an upper open end and a lower open end. The lower part of the box body 11 is provided with a socket.
In this embodiment, the box 11 is a box without a bottom and a cover. The box body comprises four side plates which are connected end to form the box body. The box body 11 is erected on the integration table 6 through a steel structure frame body. The steel structure support body includes support and carrier bar. Four supports are installed on the integration platform and are arranged right below four corner parts of the box body. Every two supports are connected with a bearing beam in a supporting mode, and the bearing beams are arranged along the length direction of the box body. A relatively long side plate of the box body is arranged on a bearing beam. The socket is formed in the lower portion of a relatively short side plate of the box body. The internal width of the box body 11 is adapted to the width of a single shield tail brush to be tested.
The lower closing plate 13 is inserted into the insertion opening so as to be movable in the longitudinal direction of the case 11. The lower closing plate is used for closing the lower opening end of the box body.
The upper closing plate 12 is installed in the upper opening end of the box body in a liftable manner, and the upper closing plate is used for closing the upper opening end.
The number of the shield tail brushes to be tested is three, and the three shield tail brushes to be tested are arranged in the same direction.
In the present embodiment, the shield tail brush to be tested comprises a bottom plate 21, a front protection plate 22, a rear protection plate 23 and brush wires 24. The front protective plate and the rear protective plate are clamped on the brush wire and connected to the bottom plate. And thirdly, the bottom plate 21 of the shield tail brush to be tested is arranged at the bottom of the upper sealing plate 12 through a bolt fastening piece, so that the bottom plate is tightly attached to the bottom of the upper sealing plate. The three shield tail brushes to be tested are arranged at intervals along the length direction of the box body 11. Each shield tail brush to be tested is arranged along the width direction of the box body 11. The both sides on the width direction of the shield tail brush that awaits measuring are laminated in the inside wall of box 11. The bottom of the rear protection plate 23 of the shield tail brush to be tested is elastically pressed against the lower closing plate 13.
Thus, as shown in fig. 2, the internal cavity of the box body is divided into at least three cavities by the three shield tail brushes to be tested. Specifically, the front protection plate and the rear protection plate of the shield tail brush to be tested are taken as references and taken as the front-back direction, namely, one side of the front protection plate of the shield tail brush to be tested is the front side, and one side of the rear protection plate of the shield tail brush to be tested is the rear side. A sealed muddy water cavity a is formed between the rear protective plate 23 of the first shield tail brush to be tested and the inner side wall of the box body 11. Two sealed grease cavities are formed between the rear protection plates 23 of the two adjacent shield tail brushes to be tested, namely a front grease cavity b close to the muddy water cavity a and a rear grease cavity c far away from the muddy water cavity a. An oil filling hole communicated with the grease cavity and a water filling hole communicated with the muddy water cavity a are formed in the relatively long side plate of the box body 11. In this embodiment, oil injection holes of the front grease chamber b and the rear grease chamber c are respectively opened in the relatively long side plate of the case 11.
According to the shield tail brush performance testing device, the upper sealing plate simulates a shield tail, the lower sealing plate simulates a pipe piece, the upper sealing plate is lifted to adjust the gap between the upper sealing plate and the lower sealing plate, so that the size of the gap between the shield tail and the pipe piece is simulated, the lower sealing plate is moved along the length direction of the box body to simulate the relative movement between the shield tail and the pipe piece during shield tunneling, three shield tail brushes to be tested are arranged in the box body to form a sealed muddy water cavity and a grease cavity, and water and grease are respectively injected into the muddy water cavity and the grease cavity through the water injection hole and the oil injection hole, so that the bearing capacity and the sealing capacity of the shield tail brush are simulated. Furthermore, water is injected into the muddy water cavity through the water injection hole and is used as pressure muddy water in the tunneling process of the medium simulation shield tunneling machine, the detected tightness of the shield tail brush to be detected is stricter than that of the pressure muddy water, and the performance of the shield tail brush can be accurately detected. The shield tail brush performance testing device can quickly and efficiently detect the performance of a single shield tail brush, provides a theoretical basis for shield tail brush type selection of a shield machine, and avoids high risk brought to engineering construction by empirical type selection. The shield tail brush performance testing device can be used for testing a single shield tail brush, and is economical and efficient in testing and low in testing cost.
In the present embodiment, the oil filler 62 is connected to the oil hole. The oiling device comprises an oil storage tank, an oil pipeline and a first delivery pump. The first delivery pump is installed on an oil pipeline. The first end of defeated oil pipe way is connected in the oil storage tank, and the second end of defeated oil pipe way is connected in the oil filler point.
The water injection hole is connected with a water injection device 61. The water injection device comprises a water storage tank, a water delivery pipeline, an air compressor and a second delivery pump. The second delivery pump is arranged on the water delivery pipeline. The air compressor machine is connected in the water storage tank, and the first end of hydraulic pipeline is connected in the air compressor machine, and the second end of hydraulic pipeline is connected in the water filling hole. The pressure gas of the air compressor realizes the fine adjustment of the water pressure.
The water injection means 61 and the oil injection means 62 are integrally mounted on the integration table 6.
Furthermore, pressure sensors are respectively arranged in the muddy water cavity and the grease cavity, and the pressure sensors are used for collecting pressure values in the muddy water cavity and the grease cavity in real time.
As a preferred embodiment, the outer side walls of two opposite sides of the box body 11 are vertically provided with the jacking cylinders 4. The telescopic ends of the two jacking cylinders 4 extend to the upper part of the box body 11 and are connected with a supporting beam 41, the supporting beam 41 is connected with a suspender 42, and the suspender 42 extends to the upper opening end and is connected with the top of the upper sealing plate 12.
Specifically, the exterior of the relatively short side panels of the cabinet are connected to a platform panel. The jacking oil cylinder is vertically arranged on the platform plate, and the fixed end of the jacking oil cylinder is welded on the platform plate.
Two positioning plates 111 are fixedly mounted outside the box body 11. The two positioning plates 111 are disposed opposite to each other. The positioning plate 111 is provided with a through hole, and the lower sealing plate 13 is movably inserted in the through hole. The positioning plate is attached to the outside of the relatively short side plate of the case. The through hole of the positioning plate is aligned to the socket of the box body.
As a preferred embodiment, the integration platform 6 is provided with a translation cylinder 5, the translation cylinder 5 is arranged along the length direction of the box body 11, and the telescopic end of the translation cylinder 5 is connected to the lower sealing plate 13. Furthermore, the translation oil cylinder is arranged between the two bearing beams, and the fixed end of the translation oil cylinder is fixedly connected to the bearing beams. The bottom fixedly connected with otic placode of shrouding down, the flexible end of translation hydro-cylinder is connected in the otic placode.
As a preferred embodiment, the shield tail brush performance testing device of the present invention further includes a sealing assembly 3. Specifically, the sealing assemblies 3 are respectively installed between the box body 11 and the upper sealing plate 12, between the lower sealing plate 13 and between the box body and the shield tail brush to be tested.
Specifically, the seal assembly 3 includes: a first seal 31, a second seal 32, a third seal 33 and a fourth seal 34.
A first seal 31 is provided between the upper closure plate 12 and the container body 11. The first seal 31 is mounted to the upper closure plate 12 and is arranged in a ring around the outer edge of the upper closure plate 12.
The second sealing element 32 is arranged between the rear protection plate 23 of the shield tail brush to be tested and the box body 11. The second sealing member 32 is attached to a side portion of the rear protection plate 23, and the second sealing member 32 is disposed along a length direction of the rear protection plate 23. The upper end of the second sealing member 32 is mounted on the base plate and extends upward to be connected to the first sealing member 31.
For the grease cavities (the front grease cavity b and the rear grease cavity c), the first sealing element, the second sealing element and the third sealing element form lateral sealing closed loops at two opposite sides in the width direction of the shield tail brush to be tested.
A fourth seal 34 is provided to seal off the gap between the socket and the lower closure plate 13. The fourth packing 34 is installed on the inner sidewall of the case 11. For the muddy water cavity a, the fourth sealing element, the first sealing element, the second sealing element (the second sealing element on the side of the first shield tail brush to be tested with the front-back direction of the shield tail brush to be tested as the reference) and the third sealing element form a lateral sealing closed loop of the muddy water cavity.
The sealing assembly has the function of blocking the leakage of the two opposite sides of the shield tail brush to be tested in the width direction, and therefore the accuracy of the performance test result of the shield tail brush to be tested is improved.
As a preferred embodiment, referring to fig. 9, a first receiving groove is formed on a side surface of the upper sealing plate 12. The first receiving groove is provided with a circle along the circumferential direction of the upper closing plate 12. The first side of the first sealing member 31 is embedded in the first receiving groove, and the second side of the first sealing member 31 is pressed lower than the inner side wall of the box 11.
In the present embodiment, the first seal 31 is a rubber seal.
In the embodiment, referring to fig. 6 to 8, the width of the rear protection plate 23 is larger than the width of the front protection plate 22 of the shield tail brush to be measured. The bottom plate 21 is provided with a third receiving groove 210 aligned with the side portion of the rear protection plate 23, and the third receiving groove 210 is disposed along the direction of the plate surface of the rear protection plate 23 and is communicated with the first receiving groove.
Referring to fig. 8, a second receiving groove 320 is formed on the circumferential surface of the second sealing element 32, and the second receiving groove 320 is disposed along the length direction (i.e., the axial direction) of the second sealing element 32. The side portion of the rear protection plate 23 is fitted in the second receiving groove 320 of the lower end of the second sealing member 32. The upper end of the second sealing member 32 is embedded in the third receiving groove 210 formed at the side of the bottom plate, and the second sealing member 32 is pressed lower than the inner sidewall of the case 11. The upper end of the second seal member is connected to the first seal member.
In this embodiment, the second seal 32 is a round strip-shaped rubber strip.
As a preferred embodiment, referring to fig. 3 and 4, a fourth receiving groove is formed on an inner sidewall of the box 11, a first side of the third sealing element 33 is embedded in the fourth receiving groove, a lower portion of a second side of the third sealing element 33 is pressed lower than the lower sealing plate 13, and an upper portion of the second side of the third sealing element 33 is pressed lower than a lower end of the second sealing element 32.
In this embodiment, the third seal 33 is a packing seal.
In a preferred embodiment, the fourth sealing element 34 is a rubber pad, and the lower end of the rubber pad is pressed lower than the upper surface of the lower sealing plate 13.
The invention provides a method for testing the performance of a shield tail brush, which comprises the following steps:
s1: go up the shrouding in the lift for go up the shrouding and equal the shield tail of shield structure machine and the actual distance between the section of jurisdiction down between the shrouding.
Before the shield tail brush to be tested is formally tested, the upper sealing plate is lifted, so that the distance between the upper sealing plate and the lower sealing plate is equal to the actual distance between the shield tail of the shield tunneling machine and the segment, and the actual distance between the shield tail of the shield tunneling machine and the segment is simulated.
S2: and injecting grease into a grease cavity (front grease cavity b) adjacent to the muddy water cavity a through the oil injection hole until the grease breaks through the first shield tail brush to be tested forward and permeates into the muddy water cavity a.
After the distance between the upper sealing plate and the lower sealing plate is adjusted to meet the actual distance, grease is injected into the forward grease cavity b through the oil injection hole by the grease injection device until the grease breaks through the first shield tail brush to be tested forward and permeates into the muddy water cavity a.
S3: when the grease breaks through the first shield tail brush to be detected forward, the grease pressure in the grease cavity (front grease cavity b) is detected to obtain the grease initial pressure of the shield tail brush to be detected.
And when the pressure sensor in the front grease cavity b is used for detecting that the grease breaks through the first shield tail brush to be detected forward, the grease pressure in the front grease cavity b is the grease initial pressure of the shield tail brush to be detected.
S4: after the grease initial pressure is obtained through detection, water is injected into the muddy water cavity a through the water injection hole, so that the muddy water pressure in the muddy water cavity a reaches the muddy water initial pressure, and the muddy water initial pressure is smaller than the grease initial pressure.
After the initial grease pressure of the shield tail brush to be tested is obtained, the maximum bearing capacity of the shield tail brush to be tested can be formally tested.
Preferably, the initial state of the shield tail brush performance testing device of the invention is recovered.
And after the initial state is recovered, injecting grease into the front grease cavity b, so that the grease pressure of the front grease cavity b reaches the grease initial pressure.
After the grease pressure of the front grease cavity b reaches the grease initial pressure, water is injected into the muddy water cavity a through the water injection hole, so that the muddy water pressure in the muddy water cavity a reaches the muddy water initial pressure. The initial pressure of the muddy water is less than the initial pressure of the grease.
In this embodiment, the initial pressure of the slurry is lower than the initial pressure of the grease by a predetermined difference.
Further, the initial pressure of the muddy water is-0.5 bar of the initial pressure of the grease.
And after the pressure value of the muddy water cavity reaches the initial muddy water pressure, closing the water injection device to maintain the pressure value of the muddy water cavity for a preset time. In this example, the pressure value of the muddy water chamber was maintained for 10 minutes.
If the pressure value of the mud cavity after 10 minutes is reduced to be in the range of 0-0.1bar, the next step can be carried out.
If the pressure value of the muddy water cavity after 10 minutes is reduced to exceed the range of 0-0.1bar, the tightness of the box body and the sealing assembly of the shield tail brush performance testing device is re-detected and maintained. And after the tightness is detected and maintained, water is injected again for detection until the pressure value of the muddy water cavity is reduced to 0-0.1bar within 10 minutes, and then the next step is carried out.
S5: and after the muddy water pressure reaches the initial muddy water pressure, continuously injecting water and grease, and always keeping the muddy water pressure lower than the grease pressure by a preset difference value until the water or the grease penetrates through the second shield tail brush to be tested backwards and permeates into the other grease cavity (the rear grease cavity c).
And after the tightness of the muddy water cavity is detected, continuously injecting water into the muddy water cavity and injecting grease into the front grease cavity b, and always keeping the muddy water pressure lower than the grease pressure by a preset difference value until water or grease penetrates through a second shield tail brush to be detected backwards and permeates into another grease cavity (namely a rear grease cavity c).
S6: and when the water or the grease is used for puncturing the second shield tail brush to be detected backwards, detecting the grease pressure to obtain the maximum bearing capacity of the shield tail brush to be detected.
And recording the internal pressure value of the front grease cavity b when water or grease penetrates backwards through the second shield tail brush to be tested, wherein the pressure value is the maximum bearing capacity of the shield tail brush to be tested.
Note that the pressure difference between the muddy water cavity and the front grease cavity b is always kept at about 0.5bar, and when the pressure value in the muddy water cavity is higher than the pressure value in the front grease cavity b, the phenomenon of shield tail seal breakdown may occur, resulting in test failure.
In addition, after the grease cavity is filled with grease and the muddy water pressure value in the muddy water cavity is maintained to the design or construction required value of the shield tunneling machine, the moving speed of the lower sealing plate is adjusted to the actual propelling speed of the shield tunneling machine so as to dynamically simulate the propelling of the shield tunneling machine and further monitor the pressure value in the grease cavity. After the pressure value in the grease cavity is reduced, grease is replenished into the grease cavity through the grease injection device, the grease replenishing quantity is obtained, and the grease consumption of a single shield tail brush to be measured in unit time can be accurately measured. And the theoretical grease consumption of the single-ring pipe joint can be calculated according to the grease consumption multiplied by the total number of shield tail brushes on the shield machine.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the invention is to be defined by the scope of the appended claims.
Claims (10)
1. The utility model provides a shield tail brush capability test device which characterized in that includes:
the box body is provided with an upper opening end;
the upper sealing plate is used for sealing the upper opening end and is arranged in the upper opening end in a lifting way; and
three shield tail brushes that await measuring that the syntropy set up, three the bottom plate of the shield tail brush that awaits measuring install in go up the bottom of shrouding, three the shield tail brush that awaits measuring is followed the length direction interval of box sets up, each the shield tail brush that awaits measuring is followed the width direction of box sets up, both sides on the width direction of the shield tail brush that awaits measuring are laminated in the inside wall of box, the bottom elasticity of the back protection shield of the shield tail brush that awaits measuring press support in on the bottom of box, adjacent two form sealed grease chamber between the back protection shield of the shield tail brush that awaits measuring, first the back protection shield of the shield tail brush that awaits measuring with form sealed muddy water chamber between the inside wall of box, the box seted up communicate in the oil filler point in grease chamber with communicate in the water injection hole in muddy water chamber.
2. The shield tail brush performance testing device of claim 1, wherein the box body further has a lower opening end, a socket is formed in the lower portion of the box body, a lower sealing plate for closing the lower opening end is movably inserted into the socket along the length direction of the box body, and the bottom of the rear protection plate is elastically pressed against the lower sealing plate.
3. The device for testing the performance of the tail brush of the shield according to claim 2, further comprising sealing components, wherein the sealing components are respectively installed between the box body and the upper sealing plate, between the box body and the lower sealing plate, and between the box body and the tail brush to be tested.
4. The shield tail brush performance testing device of claim 2, wherein the outer side walls of two opposite sides of the box body are vertically provided with jacking cylinders, the telescopic ends of the jacking cylinders extend to the upper side of the box body and are connected with supporting beams, the supporting beams are connected with hanging rods, and the hanging rods extend into the upper opening end and are connected to the top of the upper sealing plate.
5. The shield tail brush performance testing device of claim 2, wherein the oil injection hole is connected with an oil injection device.
6. The shield tail brush performance testing device of claim 5, wherein a water injection device is connected to the water injection hole.
7. The shield tail brush performance testing device of claim 6, wherein the box body is erected on an integration platform, and the water injection device and the oil injection device are integrally mounted on the integration platform.
8. The device for testing the performance of the shield tail brush according to claim 7, wherein two positioning plates are fixedly mounted on the exterior of the box body, the two positioning plates are oppositely arranged, the positioning plates are provided with through holes, and the lower sealing plate is movably inserted into the through holes.
9. The shield tail brush performance testing device of claim 7, wherein a translation oil cylinder is mounted on the integration platform, the translation oil cylinder is arranged along the length direction of the box body, and a telescopic end of the translation oil cylinder is connected to the lower sealing plate.
10. A method for testing the performance of a shield tail brush performance testing device according to any one of claims 1 to 9, comprising the steps of:
lifting the upper sealing plate to enable the distance between the upper sealing plate and the bottom of the box body to be equal to the actual distance between a shield tail of the shield tunneling machine and the duct piece;
injecting grease into a first grease cavity adjacent to the muddy water cavity through the grease injection hole until the grease breaks through the first shield tail brush to be tested forward and permeates into the muddy water cavity;
when the grease breaks through a first shield tail brush to be detected forward, detecting the grease pressure in the first grease cavity to obtain the grease initial pressure of the shield tail brush to be detected;
after the initial grease pressure is obtained through detection, water is injected into the muddy water cavity through a water injection hole, so that the muddy water pressure in the muddy water cavity reaches the initial muddy water pressure, and the initial muddy water pressure is smaller than the initial grease pressure;
after the muddy water pressure reaches the muddy water initial pressure, continuing to inject water into the muddy water cavity and injecting grease into the first grease cavity, and always keeping the muddy water pressure lower than the grease pressure by a preset difference value until the water or the grease penetrates through the second shield tail brush to be tested backwards and permeates into the second grease cavity;
and when the water or the grease penetrates backwards through the second shield tail brush to be detected, detecting the grease pressure in the first grease cavity to obtain the maximum bearing capacity of the shield tail brush to be detected.
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| CN202010614519.4A CN111811853B (en) | 2020-06-30 | 2020-06-30 | Shield tail brush performance testing device and testing method thereof |
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| CN202010614519.4A CN111811853B (en) | 2020-06-30 | 2020-06-30 | Shield tail brush performance testing device and testing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903198A (en) * | 2021-01-21 | 2021-06-04 | 北京交通大学 | Shield tail grease sealing performance detection platform |
| CN113188728A (en) * | 2021-04-08 | 2021-07-30 | 中铁隧道局集团有限公司 | Dynamic and long-distance shield tail brush sealing performance testing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203241254U (en) * | 2013-05-16 | 2013-10-16 | 中铁隧道集团有限公司 | Shield tail brush comprehensive performance detection test platform |
| CN107449569A (en) * | 2017-09-29 | 2017-12-08 | 中铁隧道局集团有限公司 | A kind of shield tail brush sealing property testing equipment and its method of testing |
| CN108375482A (en) * | 2018-03-23 | 2018-08-07 | 北京交通大学 | High hydraulic pressure slurry balance shield collective model experimental rig and method |
| CN109839496A (en) * | 2019-04-01 | 2019-06-04 | 粤水电轨道交通建设有限公司 | A kind of tail seal grease of shield height emulation detection device and detection method |
| CN208968766U (en) * | 2018-05-28 | 2019-06-11 | 广州轨道交通建设监理有限公司 | A kind of experimental provision for shield ventral brush leak test |
| WO2020056993A1 (en) * | 2018-09-17 | 2020-03-26 | 中国铁建重工集团有限公司 | Main drive high-pressure sealing system for shield machine and slurry balance shield machine |
| CN210221425U (en) * | 2019-09-05 | 2020-03-31 | 中铁工程装备集团有限公司 | Experimental device for be used for shield to construct tail brush sealing performance test |
-
2020
- 2020-06-30 CN CN202010614519.4A patent/CN111811853B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203241254U (en) * | 2013-05-16 | 2013-10-16 | 中铁隧道集团有限公司 | Shield tail brush comprehensive performance detection test platform |
| CN107449569A (en) * | 2017-09-29 | 2017-12-08 | 中铁隧道局集团有限公司 | A kind of shield tail brush sealing property testing equipment and its method of testing |
| CN108375482A (en) * | 2018-03-23 | 2018-08-07 | 北京交通大学 | High hydraulic pressure slurry balance shield collective model experimental rig and method |
| CN208968766U (en) * | 2018-05-28 | 2019-06-11 | 广州轨道交通建设监理有限公司 | A kind of experimental provision for shield ventral brush leak test |
| WO2020056993A1 (en) * | 2018-09-17 | 2020-03-26 | 中国铁建重工集团有限公司 | Main drive high-pressure sealing system for shield machine and slurry balance shield machine |
| CN109839496A (en) * | 2019-04-01 | 2019-06-04 | 粤水电轨道交通建设有限公司 | A kind of tail seal grease of shield height emulation detection device and detection method |
| CN210221425U (en) * | 2019-09-05 | 2020-03-31 | 中铁工程装备集团有限公司 | Experimental device for be used for shield to construct tail brush sealing performance test |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903198A (en) * | 2021-01-21 | 2021-06-04 | 北京交通大学 | Shield tail grease sealing performance detection platform |
| CN112903198B (en) * | 2021-01-21 | 2022-08-16 | 北京交通大学 | Shield tail grease sealing performance detection platform |
| CN113188728A (en) * | 2021-04-08 | 2021-07-30 | 中铁隧道局集团有限公司 | Dynamic and long-distance shield tail brush sealing performance testing device |
| CN113188728B (en) * | 2021-04-08 | 2022-07-05 | 中铁隧道局集团有限公司 | Dynamic and long-distance shield tail brush sealing performance testing device |
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