CN215949551U - TBM foam dust fall system and entry driving machine - Google Patents
TBM foam dust fall system and entry driving machine Download PDFInfo
- Publication number
- CN215949551U CN215949551U CN202122471260.5U CN202122471260U CN215949551U CN 215949551 U CN215949551 U CN 215949551U CN 202122471260 U CN202122471260 U CN 202122471260U CN 215949551 U CN215949551 U CN 215949551U
- Authority
- CN
- China
- Prior art keywords
- foam
- tbm
- water
- cutter head
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The utility model belongs to the technical field of tunneling machine foam, and provides a TBM foam dust settling system and a tunneling machine, which comprise a foam generating device, a cutter head nozzle arranged on the back of a cutter head in an excavation bin, and a belt conveyor nozzle arranged at a slag receiving port of a belt conveyor; the foam generating device comprises a foam generator and a waterway system connected with the foam generator; a compressed air system connected to the foam generator. Also comprises a foam stock solution connected with a water system; mixing the foam stock solution and water in a pipeline, and inputting the mixed foam mixed solution into a foam generator to be mixed with air; and the generated foam is conveyed to a cutter nozzle and a belt conveyor nozzle through pipelines. The utility model is designed to spray foam at the slag connecting part of the cutter head back and the belt conveyor, and solves the problems of serious dust diffusion in a TBM excavation bin and poor slag discharging effect of the belt conveyor.
Description
Technical Field
The utility model relates to a TBM foam dust settling system and a heading machine, and belongs to the technical field of heading machine foams.
Background
In the construction process of an open type TBM and a shield type TBM, large dust can be generated in an excavation bin, and a dust removal system configured for the TBM cannot process the dust in time, so that the dust in a shield body and an assembly area is seriously diffused, the body health of constructors is influenced, and the safety construction is not facilitated. The existing dust removal technology of TBM comprises the following steps: 1) a dust remover and a dust removing fan are configured to pump away dust generated by the excavation cabin; 2) spraying water on the front part of the cutter head to cool the cutter head and simultaneously reducing dust; 3) and a water spraying pipeline is arranged at a slag falling port of the main belt conveyor for dust reduction. However, when the water injection amount of the cutter head and the water injection amount of the slag outlet of the belt conveyor are too large, the slag soil can be diluted, and the slag discharge of the belt conveyor is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a TBM foam dust settling system and a heading machine, which are used for solving the problem of serious dust diffusion in a TBM excavation bin.
In order to achieve the purpose, the utility model provides a TBM foam dust-settling system which comprises a cutter head nozzle arranged on the back surface of a cutter head in an excavation bin, wherein dust is settled when the cutter head breaks stones; also comprises a foam generating device;
the foam generating device comprises a water pump and a waterway interface for connecting a water system; the air channel interface is used for connecting a compressed air source; and a foam generator;
the waterway interface is connected with a water inlet of the foam generator through a water pump so as to form a fast flowing water channel in the foam generator; the gas path interface is connected with a gas input port of the foam generator to form an airflow channel crossed with the water flow channel, and a porous sieve plate is arranged at the crossed position of the water flow channel and the airflow channel in the foam generator; a foam output port is also arranged at the tail end of the water flow channel on the foam generator;
the cutter head nozzle is connected with a foam output port.
The utility model forms high-speed water flow in the foam generator, promotes foaming by blowing compressed air into the water flow, simultaneously drives foam into a cutter head nozzle on the back of a cutter head by means of water flow pressure, after the cutter head of the hard rock tunneling machine cuts rock, rock debris falls into an excavation bin through the cutter head, the back of the cutter head is a source for generating dust, and the foam is sprayed at the source to adsorb and eliminate the dust. Compared with the conventional water spraying method, the method for spraying the foam can form compact foam to cover the dust source, so that the dust can be prevented from diffusing; the total surface area of foam formed by compressed air is large, the foam adhesion force is strong, and the foam spraying method which is more easily combined with dust can save water.
Furthermore, the foam generating device also comprises a foam stock solution tank, and the foam stock solution tank is connected to a junction of a pipeline between the foam generator and the waterway interface through a foam stock solution pump so as to inject the foam stock solution into the pipeline before the foam generator to be mixed with water to form foam mixed solution.
The foam stock solution is added into the water flow in advance, the foam stock solution is fully mixed in the pipeline at the junction point to form foam mixed solution, and the foam mixed solution enters the foam generator to be mixed with gas in a rushing manner, so that the foaming is facilitated.
Furthermore, a check valve is arranged on a pipeline between the water input port and the junction.
When the foam nozzle and the pipeline at the cutter head are blocked or the water pressure is lower than the pressure of compressed air, the equipment damage caused by the reverse flow of the foam and the water flow is prevented.
Furthermore, flow meters are arranged on pipelines between the waterway interface and the water input port, between the foam stock solution tank and the junction point, and between the gas circuit interface and the gas input port; an electric regulating valve is also arranged on the pipeline between the gas path interface and the gas input port;
the flow meters are all connected to a controller with a user interaction interface, and the controller is also in control connection with a foam raw liquid pump and an electric regulating valve.
The controller can automatically adjust the foam raw liquid pump and the electric adjusting valve according to the measuring result of the flowmeter, so that the output foam meets the requirement.
Furthermore, a pressure gauge for measuring the pressure of the foam is arranged on a pipeline at the foam output port and is connected to the controller.
Further, still including setting up the belt feeder spout in belt feeder connects slag connection department, the belt feeder spout links to each other with the foam delivery outlet.
The foam can increase the adhesion capability of the slag soil and is convenient for the belt conveyor to discharge slag.
Further, in the above TBM foam dust settling system, the pipeline between the foam output port and the cutter head nozzle is communicated with the pipeline outside the cutter head through a cutter head rotary joint.
Further, in the above TBM foam dust settling system, the output end of the water pump is connected to the output end of the foam concentrate pump and then connected to the input port of the foam generator.
Further, in the TBM foam dust settling system, the foam generator is provided with a glass lens for conveniently observing the foam generation condition.
The foam generation condition and the foam pressure condition can be conveniently observed and known by an operator.
Further, in the TBM foam dust settling system, a valve is arranged between the nozzle of the belt conveyor and the foam output port and is connected to the controller.
In addition, the utility model also provides a heading machine using the TBM foam dust settling system, and the structure and the beneficial effects of the TBM foam dust settling system are the same as those of the TBM foam dust settling system, and are not repeated herein.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Wherein 11 is a waterway connector, 12 is a centrifugal water pump, 13 is a water flowmeter, 21 is a foam stock solution tank, 22 is a variable-frequency foam stock solution pump, 23 is a foam stock solution flowmeter, 31 is an air passage connector, 32 is a compressed air electric regulating valve, 33 is a compressed air flowmeter, 4 is a check valve, 5 is a foam generator, 6 is a pressure gauge, 7 is a pneumatic ball valve, 8 is an excavation bin, and 9 is a cutter head rotary joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following detailed description is provided for the technical principles and practical applications of the present invention with reference to the accompanying drawings and embodiments.
The utility model discloses a TBM foam dust settling system which mainly comprises a waterway connector 11, a centrifugal water pump 12, a water flow meter 13, a foam stock solution tank 21, a variable-frequency foam stock solution pump 22, a foam stock solution flow meter 23, an air passage connector 31, a compressed air electric regulating valve 32, a compressed air flow meter 33, a check valve 4, a foam generator 5, a pressure gauge 6, a pneumatic ball valve 7, an excavation bin 8, a cutter head rotary joint 9, a cutter head nozzle 81, a belt conveyor slag receiving nozzle 82, an upper computer and a pipeline, as shown in figure 1.
The external water supply system is connected to the waterway interface 11 through a pipeline to provide industrial water, and the waterway interface 11, the centrifugal water pump 12 and the water flow meter 13 are connected through pipelines in sequence to form a water flow channel. The foam stock solution tank 21, the variable-frequency foam stock solution pump 22 and the foam stock solution flowmeter 23 are connected in sequence through pipelines to form a foam stock solution flow passage. The compressed air path interface 31 is connected with an air compressor to provide compressed air, and the air path interface 31, the compressed air flow meter 33 and the compressed air electric regulating valve 32 are connected through pipelines in sequence to form a compressed air path. The water flow passage firstly intersects with the foam stock solution flow passage to generate foam mixed liquid, and the foam mixed liquid passes through the check valve 4 and then is respectively connected with the compressed air passage to the input port of the foam generator 5 to generate foam.
High-pressure water flow of the foam mixed liquid enters the foam generator 5 to form high-speed water flow, the compressed air passage is connected to the foam generator 5, and high-speed air flow formed after the compressed air enters the foam generator 5 impacts the high-speed water flow from one side to excite foaming and form foam in the foam generator 5. Specifically, a porous filter plate is horizontally arranged in the foam generator 5, the upward moving air flow collides with water entering from a water inlet through the filter plate, when the air flow passes through sieve holes in the filter plate, air and water are fully contacted, a boiling-shaped foam layer is formed on the filter plate, and the foam enters a downstream pipeline from a foam outlet of the foam generator 5 under the pressure of water flow and air flow.
The foam generator 5 has a glass lens for the operator to observe the mixing effect, and the check valve 4 prevents the reverse flow of the foam with excessive pressure inside the foam generator 5 into the upstream waterway or foam system. In another embodiment, the bubble generation may be performed by exciting the high-speed water flow with only compressed air without providing the foam raw liquid flow path.
The foam output port of the foam generator 5 is provided with a pressure gauge 6, the foam output port is divided into two branches, one branch is connected to a cutter head nozzle 81 arranged at the back of a cutter head in the excavation bin 8, wherein a pipeline in the cutter head is communicated with a pipeline outside the cutter head through a cutter head rotary joint 9, and the other branch is connected to a nozzle 82 at the slag receiving position of the belt conveyor above a slag receiving port of the belt conveyor through a pneumatic ball valve 7.
The water flow meter 12, the foam raw liquid flow meter 22, the compressed air flow meter 32 and the pressure gauge 6 are connected to an upper computer to display the flow and pressure measurement results, and the upper computer is connected to the variable-frequency foam raw liquid pump 21, the compressed air electric regulating valve 31 and the pneumatic ball valve 7 to control the flow of the foam raw liquid, the compressed air and the foam flow above the slag receiving port of the belt conveyor. The upper computer can automatically calculate and adjust the variable frequency foam raw liquid pump 22 and the compressed air electric regulating valve 32 according to the input foam raw liquid proportion and the foam expansion rate and by combining the measurement results of the water flowmeter 13, the foam raw liquid flowmeter 23 and the compressed air flowmeter 33 so that the mixed foam meets the conditions of the foam raw liquid proportion and the foam expansion rate. Foam stock solution proportion formula:
wherein P is the mixture ratio, F is the foam stock solution flow, and W is the water flow; foam expansion ratio FER equation:
where V is the flow rate.
The method comprises the following specific operation steps:
1. and setting the foam stock solution ratio and the foam expansion rate on an upper computer interface.
2. And pressing a start button on an upper computer interface, starting the whole system, starting the centrifugal water pump 12 and displaying the water flow meter 13. After being regulated by the system, the foam is sprayed out from a nozzle at the back of the cutter head.
3. And controlling a pneumatic ball valve 7 on an upper computer interface, and opening or closing the belt conveyor to remove the foam dust at the slag receiving position.
4. After the operation is finished, a stop button is pressed on the interface of the upper computer, and the centrifugal water pump 12, the variable-frequency foam raw liquid pump 22, the compressed air electric regulating valve 32 and the pneumatic ball valve 7 are closed.
The utility model also protects the heading machine with the TBM foam dust-settling system, and the dust-settling system on the heading machine is the same as the TBM foam dust-settling system, so the details are not repeated herein.
Claims (10)
1. A TBM foam dust-settling system is characterized by comprising a cutter head nozzle arranged on the back surface of a cutter head in an excavation bin and used for settling dust when the cutter head breaks stones; also comprises a foam generating device;
the foam generating device comprises a water pump and a waterway interface for connecting a water system; the air channel interface is used for connecting a compressed air source; and a foam generator;
the waterway interface is connected with a water inlet of the foam generator through a water pump so as to form a fast flowing water channel in the foam generator; the gas path interface is connected with a gas input port of the foam generator to form an airflow channel crossed with the water flow channel, and a porous sieve plate is arranged at the crossed position of the water flow channel and the airflow channel in the foam generator; a foam output port is also arranged at the tail end of the water flow channel on the foam generator;
the cutter head nozzle is connected with a foam output port.
2. The TBM foam dedusting system of claim 1, wherein the foam generating apparatus further includes a foam concentrate tank that is connected to a junction of the piping between the foam generator and the waterway interface via a foam concentrate pump to enable foam concentrate to be injected into the piping before the foam generator to mix with water to form a foam mixture.
3. The TBM foam dedusting system of claim 2, wherein a check valve is further disposed on the pipeline between the water input port and the junction.
4. The TBM foam dust settling system of claim 3, wherein flow meters are arranged on pipelines between the waterway interface and the water input port, between the foam stock solution tank and the junction, and between the gas circuit interface and the gas input port; an electric regulating valve is also arranged on the pipeline between the gas path interface and the gas input port;
the flow meters are all connected to a controller with a user interaction interface, and the controller is also in control connection with a foam raw liquid pump and an electric regulating valve.
5. The TBM foam dedusting system of claim 4, wherein a pressure gauge for measuring foam pressure is arranged on a pipeline at the foam outlet, and the pressure gauge is connected to a controller.
6. The TBM foam dust settling system of claim 1, further comprising a belt conveyor nozzle arranged at a belt conveyor slag receiving opening, wherein the belt conveyor nozzle is connected with the foam output opening.
7. The TBM foam dust settling system of claim 1, wherein the pipeline between the foam output port and the cutter head nozzle is communicated with the pipeline outside the cutter head through a cutter head rotary joint.
8. The TBM foam dedusting system of claim 2, wherein the foam generator has a glass lens to facilitate observation of foam generation.
9. The TBM foam dedusting system of claim 6, wherein a valve is arranged between the belt conveyor nozzle and the foam output port, and the valve is connected to the controller.
10. A heading machine using a TBM foam dust settling system, characterized in that a foam dust settling system according to any one of claims 1 to 9 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122471260.5U CN215949551U (en) | 2021-10-13 | 2021-10-13 | TBM foam dust fall system and entry driving machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122471260.5U CN215949551U (en) | 2021-10-13 | 2021-10-13 | TBM foam dust fall system and entry driving machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215949551U true CN215949551U (en) | 2022-03-04 |
Family
ID=80412396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122471260.5U Active CN215949551U (en) | 2021-10-13 | 2021-10-13 | TBM foam dust fall system and entry driving machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215949551U (en) |
-
2021
- 2021-10-13 CN CN202122471260.5U patent/CN215949551U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101251025B (en) | Coal mine down-hole foam dedusting system | |
| CN108608338B (en) | A kind of preceding mix grinding material jet flow generating apparatus | |
| CA2565290A1 (en) | Method and arrangement for producing compressed air foam for fire fighting and decontamination | |
| CN106703869B (en) | A kind of fully mechanized workface comprehensive dust prevention system | |
| CN106425887B (en) | A kind of forward and backward hybrid ice pellets gas jet device and method | |
| CN205924767U (en) | Formula proportioning device is gone into to mechanical pump | |
| CN104492008B (en) | The pouring-in positive/negative-pressure foam proportioning system of a kind of foam truck | |
| WO2015058561A1 (en) | Curing foam fluid generation device for preventing and extinguishing fire in coal mine | |
| CN102228813B (en) | Apparatus for automatically adding foaming agent | |
| CN102606164B (en) | Foam injection system for shield machine and operating method of foam injection system | |
| CN201546750U (en) | Foam generator for coal mine dust control | |
| CN102182492A (en) | Underground dust-removing foam generator and foam dust-removing equipment | |
| CN215949551U (en) | TBM foam dust fall system and entry driving machine | |
| CN103388484A (en) | No-air-source foam plug dust removing system applied to underground coal mine | |
| CN102226411A (en) | Foam dust-settling device for negative pressure-type mines | |
| CN105080252A (en) | Dust collection method for mine jaw crusher and device thereof | |
| CN112627878B (en) | Tunnel dust removal equipment | |
| CN202015582U (en) | Foaming device for use in coal mine and foam dedusting equipment | |
| CN104437229A (en) | Electric-driven liquid-powder continuous mixing device | |
| CN103452557A (en) | Heading machine with onboard foam dust collection system | |
| WO2024045249A1 (en) | Fire-fighting foam foaming apparatus, system and method | |
| CN112761707B (en) | Integrated preparation system of active agent solution for underground coal mine spraying dust fall | |
| CN209500601U (en) | A kind of compressed gas fixed froth installation | |
| CN103386372A (en) | Bottom agent-adding device for flotation machine | |
| CN103195465A (en) | Water curtain foam dust removal device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |