CN214366065U - Gas pumping and exhausting device of shield machine - Google Patents
Gas pumping and exhausting device of shield machine Download PDFInfo
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- CN214366065U CN214366065U CN202120112821.XU CN202120112821U CN214366065U CN 214366065 U CN214366065 U CN 214366065U CN 202120112821 U CN202120112821 U CN 202120112821U CN 214366065 U CN214366065 U CN 214366065U
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Abstract
The utility model discloses a shield constructs quick-witted gas row of taking out device relates to shield and constructs quick-witted construction field, reserve ball valve and pneumatic jet pump including the soil storehouse baffle, the one end that the ball valve was reserved to the soil storehouse baffle is linked together through pipeline and shield constructs quick-witted soil storehouse, and the other end is connected with the admission line, the other end of admission line with the inlet end of pneumatic jet pump is linked together, the end of giving vent to anger of pneumatic jet pump is connected with the pipeline of giving vent to anger, the inlet end of pneumatic jet pump is equipped with the air current sensor, the pneumatic jet pump is connected with the compressed gas system electricity that the shield constructs the machine from the area; the utility model discloses a shield structure machine, including inlet line, check valve, compressed gas system, automatic pressurize system, inlet line has the check valve through the pipe connection, the other end of check valve is connected with prevents stifled dredging pipe way, prevent stifled dredging pipe way with the compressed gas system is linked together, the compressed gas system is linked together through pipeline and shield structure machine from the automatic pressurize system of taking, and automatic pressurize system is linked together through pipeline and shield structure machine soil storehouse, be equipped with gas sensor in the shield structure machine soil storehouse.
Description
Technical Field
The utility model relates to a shield constructs quick-witted construction field, specifically is a shield constructs quick-witted gas row of taking out device.
Background
With the rapid development of national infrastructure, many urban subways are being put into construction, and most of the urban subway tunnel construction at present adopts a shield method for construction. The stratum condition spanned by tunnel construction is extremely complex, wherein the shield method has high danger coefficient and is difficult to prevent and control when used for gas tunnel construction. At present, most shield machines are provided with a gas sensor at the slag outlet of a screw conveyor, when the gas concentration is detected to be too high, shield tunneling is stopped, and tunnel ventilation is increased until the gas concentration is reduced to be below a safety value. The method needs shield shutdown, which affects construction period and increases construction cost, and the shield is started after shutdown to face the risk of cutter head jamming. Gas is a colorless and odorless gas, is insoluble in water, and has a density lower than that of air. If the concentration of the gas in the air is 5-16%, explosion can occur under the condition of open fire. The prevention of gas explosion generally proceeds from two aspects: the control gas concentration and the control temperature are controlled, and because the shield machine has more electrical equipment and is difficult to control the temperature and perform explosion-proof transformation, the control gas concentration is generally used for preventing gas explosion. Because the gas explosion harmfulness is very large, the casualties and the economic loss are serious, the safety coefficient is set to 10, namely the gas needs to be treated when the gas concentration reaches 0.5 percent. Therefore, the gas pumping and discharging device is designed to pump the gas of the shield machine in the construction and excavation process, and ensure the safety of excavation construction.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a shield constructs quick-witted gas and takes out row device, the device can be at the shield structure tunnelling in-process, can guarantee the construction safety and the construction normal clear of tunnelling in-process with getting into the gas drainage tunnel that shields the host computer, reduces the shield structure and shuts down, improves the efficiency of tunnelling.
The purpose of the utility model is realized through the following technical scheme:
a gas pumping and discharging device of a shield machine comprises a soil bin partition plate reserved ball valve and a pneumatic injection pump, wherein one end of the soil bin partition plate reserved ball valve is communicated with a soil bin of the shield machine through a pipeline, the other end of the soil bin partition plate reserved ball valve is connected with an air inlet pipeline, the other end of the air inlet pipeline is communicated with the air inlet end of the pneumatic injection pump, the air outlet end of the pneumatic injection pump is connected with an air outlet pipeline, the air inlet end of the pneumatic injection pump is provided with an airflow sensor, and the pneumatic injection pump is electrically connected with a compressed gas system of the shield machine; the utility model discloses a shield structure machine, including inlet line, check valve, compressed gas system, automatic pressurize system, inlet line has the check valve through the pipe connection, the other end of check valve is connected with prevents stifled dredging pipe way, prevent stifled dredging pipe way with the compressed gas system is linked together, the compressed gas system is linked together through pipeline and shield structure machine from the automatic pressurize system of taking, and automatic pressurize system is linked together through pipeline and shield structure machine soil storehouse, be equipped with gas sensor in the shield structure machine soil storehouse.
Preferably, the shield constructs the machine soil storehouse and keeps away from the one end and the shield of pneumatic injection pump cutter head of the pneumatic injection pump are linked together, the shield constructs the machine soil storehouse and is close to the soil storehouse baffle is installed to the one end of pneumatic injection pump, the ball valve is reserved to the soil storehouse baffle with automatic pressurize system passes through the pipeline respectively the soil storehouse baffle is linked together with the shield constructs the machine soil storehouse.
Preferably, a pressure sensor is arranged in the soil bin of the shield tunneling machine, the pressure sensor is installed on a partition plate of the soil bin, and the pressure sensor is electrically connected with the control terminal.
Preferably, the gas sensor with the inner wall connection in shield structure machine soil storehouse, just the outer wall cover of gas sensor is equipped with ventilative safety cover, ventilative safety cover also with the inner wall connection in shield structure machine soil storehouse, gas sensor and control terminal electricity federation.
Preferably, the compressed gas system is electrically coupled to a control terminal.
Preferably, a screw conveyor is communicated and arranged below the soil bin of the shield tunneling machine and is used for conveying out soil tunneled by the cutter head of the shield tunneling machine.
The utility model has the advantages that: the device enables gas generated by digging in the shield machine to enter the earth bin of the shield machine, and the gas entering the interior of the shield machine main machine is pumped out of the tunnel, so that the gas explosion risk is reduced; the device is improved on the basis of the existing structure of the shield machine, a ball valve is reserved through a soil bin partition plate, a gas pumping and discharging system is added, meanwhile, an automatic pressure maintaining system and a compressed air system which are equipped in the common shield machine are fully utilized, the transformation is convenient, and the cost is reduced; and the environment in the soil bin of the shield tunneling machine is complex, the shield tunneling machine comprises excavated soil, water and other substances, a breathable protective cover is additionally arranged on the periphery of the gas sensor, and the gas sensor can be protected while detecting the concentration of gas in the soil bin of the shield tunneling machine. Compared with the traditional shield machine gas treatment system, the device has the advantages that the gas treatment part is advanced to the shield machine soil bin from the slag outlet of the screw conveyor, the detected gas is directly discharged out of the construction tunnel through the device, and meanwhile, the device can prevent the gas from entering the interior of the shield machine host, so that the shield machine does not need to be stopped when the gas stratum is tunneled, and the gas stratum construction efficiency is improved; the pneumatic jet pump used by the device is driven by high-pressure gas, the explosion-proof performance is good, meanwhile, the high-pressure gas directly comes from the original compressed gas system of the shield machine, the modification is convenient, and the construction cost is reduced. The device can also initiatively detect the gas concentration in the earth bin of the shield machine and directly process the gas, and compared with the prior gas processing system, the device has the advantages of advanced detection, quick response, initiative prevention and control and the like.
Drawings
Fig. 1 is a schematic structural view of a gas exhaust device of a shield tunneling machine of the present invention;
in the figure, 1-shield machine cutterhead, 2-shield machine soil bin, 3-ventilation protective cover, 4-gas sensor, 5-soil bin partition reserved ball valve, 6-air inlet pipeline, 7-pneumatic jet pump, 8-air outlet pipeline, 9-compressed gas system, 10-automatic pressure maintaining system, 11-pressure sensor, 12-anti-blocking dredging pipeline, 13-one-way valve, 14-soil bin partition, 15-spiral conveyer.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1, a gas pumping and discharging device of a shield machine comprises a soil bin partition plate reserved ball valve 5 and a pneumatic injection pump 7, wherein one end of the soil bin partition plate reserved ball valve 5 is communicated with a soil bin 2 of the shield machine through a pipeline, the other end of the soil bin partition plate reserved ball valve 5 is connected with an air inlet pipeline 6, the other end of the air inlet pipeline 6 is communicated with the air inlet end of the pneumatic injection pump 7, the air outlet end of the pneumatic injection pump 7 is connected with an air outlet pipeline 8, the air inlet end of the pneumatic injection pump 7 is provided with an airflow sensor, and the pneumatic injection pump 7 is electrically connected with a compressed gas system 9 of the shield machine; the air inlet pipeline 6 is connected with a one-way valve 13 through a pipeline, the other end of the one-way valve 13 is connected with an anti-blocking dredging pipeline 12, the anti-blocking dredging pipeline 12 is communicated with a compressed gas system 9, the compressed gas system 9 is communicated with an automatic pressure maintaining system 10 of the shield machine through a pipeline, the automatic pressure maintaining system 10 is communicated with a shield machine soil bin 2 through a pipeline, and a gas sensor 4 is arranged in the shield machine soil bin 2.
Further, one end of the shield machine soil bin 2, which is far away from the pneumatic injection pump 7, is communicated with the shield machine cutter head 1, one end of the shield machine soil bin 2, which is close to the pneumatic injection pump 7, is provided with a soil bin partition 14, and the soil bin partition reserved ball valve 5 and the automatic pressure maintaining system 10 respectively penetrate through the soil bin partition 14 through pipelines to be communicated with the shield machine soil bin 2; a pressure sensor 11 is arranged in the soil bin 2 of the shield tunneling machine, the pressure sensor 11 is installed on a soil bin partition plate 14, and the pressure sensor 11 is electrically connected with a control terminal; the gas sensor 4 is connected with the inner wall of the shield machine soil bin 2, the outer wall of the gas sensor 4 is sleeved with the breathable protective cover 3, the breathable protective cover 3 is also connected with the inner wall of the shield machine soil bin 2, and the gas sensor 4 is electrically connected with the control terminal; the compressed gas system 9 is electrically connected with the control terminal; the spiral conveyor 15 is communicated with the lower part of the soil bin 2 of the shield tunneling machine, and the spiral conveyor 15 is used for conveying out soil tunneled by the cutter head 1 of the shield tunneling machine.
Further, in the tunneling process of the shield tunneling machine, the shield tunneling machine cutter head 1 is in direct contact with a soil body, a cutter on the shield tunneling machine cutter head 1 digs the soil body, the cut soil body enters the shield tunneling machine soil bin 2 through an opening of the shield tunneling machine cutter head, a soil bin partition plate 14 is arranged behind the shield tunneling machine soil bin 2, and residual soil entering the shield tunneling machine soil bin 2 is discharged by a spiral conveyor 15 arranged below the shield tunneling machine soil bin 2. When a stratum containing gas is excavated, the gas enters a soil bin 2 of the shield machine along with stratum muck, a gas sensor 4 arranged in the soil bin 2 of the shield machine detects the concentration of the gas in the soil bin in real time, preferably, the gas sensor 4 is arranged at the top end inside the soil bin 2 of the shield machine, so that the influence of the muck on the measurement is avoided, a breathable protective cover 3 is sleeved on the outer wall of the gas sensor 4, the breathable protective cover 3 is also connected with the inner wall of the soil bin 2 of the shield machine, and the gas sensor 4 is electrically connected with a control terminal; the gas sensor 4 can be protected by the breathable protective cover 3 when the gas sensor 4 detects the concentration of gas entering the soil bin 2 of the shield machine. When the concentration of the gas in the soil bin 2 of the shield machine is lower than 0.5%, the shield machine normally tunnels, and a small amount of gas can be discharged by using a ventilation system equipped with the shield machine; when the gas concentration is higher than 0.5%, the device is started to operate, the gas sensor 4 feeds back signals to the control terminal, the control terminal receives the signals, and the control terminal controls the compressed gas system 9 of the shield tunneling machine to start to operate.
Further, a compressed gas system 9 of the shield machine is communicated with an automatic pressure maintaining system 10 of the shield machine through a pipeline, and the automatic pressure maintaining system 10 is communicated with the soil bin 2 of the shield machine through a pipeline. After the control terminal receives a signal that the set gas concentration is higher than 0.5 percent, the pneumatic jet pump 7 electrically connected with the compressed gas system 9 is controlled to start, and the gas in the soil cabin 2 of the shield machine is extracted. The shield constructs the one end in quick-witted soil storehouse 2 and is close to pneumatic injection pump 7 and installs soil storehouse baffle 14, and the soil storehouse baffle is reserved ball valve 5 and is passed through soil storehouse baffle 14 through the pipeline and is linked together with shield constructs quick-witted soil storehouse 2, and pneumatic injection pump 7 passes through the pipeline with the gas in shield constructs quick-witted soil storehouse 2, reserves ball valve 5 through the soil storehouse baffle, and the inlet duct 6 that flows again enters into pneumatic injection pump 7, and the pipeline 8 that gives vent to anger that the discharge end of pneumatic injection pump 7 is connected is discharged again.
Further, when a small amount of muck in the soil bin 2 of the shield machine blocks a pipeline communicated with the soil bin partition plate reserved ball valve 5 and the soil bin of the shield machine, an airflow sensor is arranged at the air inlet end of the pneumatic injection pump 7 to receive a signal and feed back an 'airflow does not pass' signal to the control terminal, the control terminal receives the signal and starts processing, and then the control terminal controls the automatic pressure maintaining system 10; the air inlet pipeline 6 of the device is connected with a one-way valve 13 through a pipeline, the other end of the one-way valve 13 is connected with an anti-blocking dredging pipeline 12, and the anti-blocking dredging pipeline 12 is communicated with a compressed gas system 9. At this moment, the automatic pressure maintaining system 10 is communicated with high-pressure gas, the high-pressure gas passes through the anti-blocking dredging pipeline 12 and then passes through the one-way valve 13, the high-pressure gas enters the air inlet pipeline 6 from the pipeline, the pneumatic injection pump 7 is stopped at the moment, idle running is avoided, and the entering high-pressure gas cannot enter from the air inlet end of the pneumatic injection pump 7, so that the ball valve 5 can be reserved from the other end of the air inlet pipeline 6 through the soil bin partition plate, the blocked pipeline which is connected with the soil bin partition plate reserved ball valve 5 and the soil bin 2 of the shield machine is dredged, the gas is guaranteed to be exhausted out of the soil bin 2 of the shield machine through the air inlet pipeline 6 and the pneumatic injection pump 7 again, and the gas is exhausted out of a tunnel to a safe part through the air outlet pipeline 8. The pressure in the soil bin 2 of the shield machine can be influenced when the device is used for pumping and discharging gas, so that the automatic pressure maintaining system 10 starts to work, the pressure sensors 11 on the soil bin partition plates 14 are installed, the pressure sensors 11 are arranged at the upper part in the soil bin 2 of the shield machine, the automatic pressure maintaining system 10 controls the pressure of the soil bin 2 of the shield machine by using high-pressure gas from the compressed air system 9, the pressure of the soil bin 2 of the shield machine is ensured to be constant, the shield machine does not need to stop when meeting a gas stratum in the tunneling process, normal tunneling can be realized, and smooth construction is ensured.
Furthermore, the device can enable the gas generated by the excavation of the shield machine to enter the soil bin 2 of the shield machine, and can exhaust the gas entering the shield machine out of the tunnel, so as to reduce the risk of gas explosion; the device is improved on the basis of the existing structure of the shield machine, the ball valve 5 is reserved through the soil bin partition plate, a gas pumping and discharging system is added, and meanwhile, an automatic pressure maintaining system 10 and a compressed air system 9 which are equipped in the common shield machine are fully utilized, so that the device is convenient to modify and the cost is reduced; besides, the environment in the soil bin 2 of the shield tunneling machine is complex, the shield tunneling machine comprises excavated soil, water and other substances, the periphery of the gas sensor 4 is additionally provided with the breathable protective cover 3, and the gas sensor 4 can be protected while the concentration of gas in the soil bin 2 of the shield tunneling machine is detected. Compared with the traditional shield machine gas treatment system, the device advances the gas treatment part from the slag outlet of the screw conveyor 15 to the shield machine soil bin 2, directly discharges the detected gas out of the construction tunnel through the device, and can prevent the gas from entering the shield machine, so that the shield machine does not need to be stopped when the gas stratum is tunneled, and the gas stratum construction efficiency is improved; the pneumatic jet pump 7 used by the device is driven by high-pressure gas, the explosion-proof performance is good, meanwhile, the high-pressure gas directly comes from the original compressed gas system 9 of the shield machine, the modification is convenient, and the construction cost is reduced. The device can also initiatively detect the gas concentration in the shield machine soil bin 2 and directly process the gas, and compared with the conventional gas processing system, the device has the advantages of advanced detection, quick response, initiative prevention and control and the like.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (6)
1. The gas pumping and discharging device of the shield tunneling machine is characterized by comprising a soil bin partition plate reserved ball valve (5) and a pneumatic injection pump (7), wherein one end of the soil bin partition plate reserved ball valve (5) is communicated with a soil bin (2) of the shield tunneling machine through a pipeline, the other end of the soil bin partition plate reserved ball valve (5) is connected with an air inlet pipeline (6), the other end of the air inlet pipeline (6) is communicated with the air inlet end of the pneumatic injection pump (7), the air outlet end of the pneumatic injection pump (7) is connected with an air outlet pipeline (8), the air inlet end of the pneumatic injection pump (7) is provided with an airflow sensor, and the pneumatic injection pump (7) is electrically connected with a compressed gas system (9) of the shield tunneling machine;
intake pipe (6) have check valve (13) through the pipe connection, the other end of check valve (13) is connected with prevents stifled dredging pipe way (12), prevent stifled dredging pipe way (12) with compressed gas system (9) are linked together, compressed gas system (9) are linked together through pipeline and automatic pressurize system (10) of shield structure machine self-bring, and automatic pressurize system (10) are linked together through pipeline and shield structure machine soil storehouse (2), be equipped with gas sensor (4) in shield structure machine soil storehouse (2).
2. The gas pumping and discharging device for the shield tunneling machine according to claim 1, wherein one end of the shield tunneling machine soil bin (2) far away from the pneumatic injection pump (7) is communicated with a shield tunneling machine cutter head (1), one end of the shield tunneling machine soil bin (2) close to the pneumatic injection pump (7) is provided with a soil bin partition plate (14), the soil bin partition plate is provided with a ball valve (5), and the automatic pressure maintaining system (10) penetrates through the soil bin partition plate (14) through a pipeline and is communicated with the shield tunneling machine soil bin (2).
3. The shield tunneling machine gas pumping and exhausting device according to claim 2, wherein a pressure sensor (11) is arranged in the shield tunneling machine soil bin (2), the pressure sensor (11) is installed on a soil bin partition plate (14), and the pressure sensor (11) is electrically connected with a control terminal.
4. The shield tunneling machine gas drainage device according to claim 1, wherein the gas sensor (4) is connected with the inner wall of the shield tunneling machine soil bin (2), the outer wall of the gas sensor (4) is sleeved with a breathable protective cover (3), the breathable protective cover (3) is also connected with the inner wall of the shield tunneling machine soil bin (2), and the gas sensor (4) is electrically connected with a control terminal.
5. The shield tunneling machine gas extraction and exhaust device according to claim 1, wherein the compressed gas system (9) is electrically connected with a control terminal.
6. The shield tunneling machine gas drainage device according to claim 1, wherein a screw conveyor (15) is communicated below the shield tunneling machine soil bin (2), and the screw conveyor (15) is used for conveying soil tunneled by the shield tunneling machine cutterhead (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120112821.XU CN214366065U (en) | 2021-01-15 | 2021-01-15 | Gas pumping and exhausting device of shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120112821.XU CN214366065U (en) | 2021-01-15 | 2021-01-15 | Gas pumping and exhausting device of shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214366065U true CN214366065U (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120112821.XU Active CN214366065U (en) | 2021-01-15 | 2021-01-15 | Gas pumping and exhausting device of shield machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214366065U (en) |
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2021
- 2021-01-15 CN CN202120112821.XU patent/CN214366065U/en active Active
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