Gas buffer water slag separation semi-automatic two-stage blowout preventer

Abstract

The utility model discloses a kind of gas buffer water slag separation semi-automatic two-stage blowout preventer, including separation tank, composite blowout preventer and buffer intake pipe, separation tank has the overflow port of water discharge and the exhaust port of gas discharge, composite blowout preventer imports the water, coal cinder and gas mixture discharged by drilling to separation tank, buffer intake pipe is connected with composite blowout preventer, valve one is installed on buffer intake pipe, valve one opens when two-stage blowout, high-pressure gas in blowout preventer is formed pressure relief, realizes two-stage blowout. Operating personnel carry out manual control pneumatic switch according to the safety requirement of gas content, when pneumatic switch opens, valve three on water slag discharge pipe, valve one on buffer intake pipe and dead lock closing device are synchronously closed or opened, quickly realize semi-automatic control gas discharge import and export, reach control gas concentration below safety value, reaction is timely, cost and technical dependency are lower.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, specifically to a semi-automatic two-stage blowout prevention device for gas buffering and slag separation. Background Technology

[0002] By drilling holes into the gas-rich coal and rock strata before and during coal mining, the gas can be extracted, directly reducing the gas concentration in the mining face and the mine return air system, keeping it away from the explosion limit, and fundamentally eliminating the risk of explosion.

[0003] During drilling, water and slag need to be separated, and the gas that gushes out during drilling needs to be dealt with to prevent gas from exceeding the limit. Currently, there are manual anti-blowing control and automatic anti-blowing control.

[0004] While automatic blowout preventers react quickly, they are often bulky, have high purchase and operating costs, and require highly skilled technicians. In case of malfunction, professional engineers are needed to reprogram the parameters and perform repairs, making them highly dependent on technical expertise. To address these issues, this invention proposes a semi-automatic two-stage blowout preventer for gas buffering and water-slag separation. Utility Model Content

[0005] The purpose of this invention is to provide a semi-automatic two-stage anti-blowout device for gas buffer water slag separation, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a semi-automatic two-stage blowout prevention device for gas buffering and water-slag separation, comprising:

[0007] The separator has an overflow outlet for draining water and an exhaust outlet for venting gas.

[0008] A composite blowout shield guides the mixture of water, slag, and gas discharged from the borehole into the separation tank.

[0009] A buffer air inlet pipe is connected to the composite blowout preventer. A valve is installed on the buffer air inlet pipe. The valve opens during the secondary blowout preventer to relieve the pressure of the high-pressure gas inside the blowout preventer.

[0010] As a preferred technical solution, the separation box has a slag discharge port, and a valve is installed at the slag discharge port.

[0011] As a preferred technical solution, the buffer air intake pipe is connected to a buffer bag.

[0012] As a preferred technical solution, a stainless steel drain valve is provided at the bottom of the buffer bag.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] To achieve two-stage blowout prevention, operators manually control the pneumatic switch according to the safety requirements of gas content. When the pneumatic switch is opened, the valve three on the water slag discharge pipe, the valve one on the buffer air inlet pipe, and the locking and sealing device are simultaneously closed or opened, quickly realizing semi-automatic control of gas emission inlet and outlet, achieving control of gas concentration below the safe value, with timely response and low cost and technical dependence. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure;

[0016] In the diagram: 1. Separation box; 2. Drainage port; 3. Overflow port; 4. Slag discharge port; 5. Baffle plate; 6. Valve II; 7. Drainage pipe; 8. Downhole gas drainage main pipe; 9. Dust collection pipe; 10. Composite blowout preventer; 11. Water and slag discharge pipe; 12. Gas discharge pipe; 13. Valve III; 14. Locking and sealing device; 15. Buffer air inlet pipe; 16. Valve I; 17. Buffer bag; 18. Buffer exhaust pipe; 19. Pneumatic switch; 20. Air source; 21. Stainless steel drain valve. Detailed Implementation

[0017] The following is a detailed description of a semi-automatic two-stage blowout prevention device for gas buffer water-slag separation according to an embodiment of the present disclosure, with reference to the accompanying drawings. To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions in the embodiments of this disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure.

[0018] Therefore, the following detailed description of embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without inventive effort are within the scope of protection of the present disclosure.

[0019] The semi-automatic two-stage blowout preventer for gas buffer water slag separation mainly consists of a separation box 1, a composite blowout preventer 10, and a buffer air inlet pipe 15.

[0020] The composite blowout preventer 10 guides the mixture of water, slag, and gas (methane) discharged from the borehole into the separation box 1. The front end of the composite blowout preventer 10 is equipped with a dust collection pipe 9, which collects the mixture of water, slag, and gas discharged from the borehole. The composite blowout preventer 10 is connected to a water and slag discharge pipe 11 and a gas discharge pipe 12. The water and slag discharge pipe 11 and the gas discharge pipe 12 extend and connect to the separation box 1, respectively. The gas discharge pipe 12 discharges gas into the separation box 1, while the water and slag discharge pipe 11 discharges the mixture of water, slag, and gas into the separation box 1.

[0021] The slag discharge pipe 11 is equipped with valve 3 13, which is a pneumatic butterfly valve. The pneumatic butterfly valve can be pneumatically controlled to open or close the slag discharge pipe 11.

[0022] The separation box 1 has an overflow port 3 and a drainage port 2. The drainage port 2 is connected to a drainage pipe 7, which is connected to the underground gas drainage main pipe 8. The separation box 1 has a slag discharge port 4, which is located below the overflow port 3. The slag discharge port 4 is equipped with a valve 6, which is either a pneumatic butterfly valve or a manual butterfly valve, preferably a manual butterfly valve. The coal slag that settles at the bottom of the separation box 1 is cleaned by workers periodically during drill pipe replacement intervals. This can be done by manually opening the valve, thus avoiding the problem of underground water and coal slag merging and being difficult to handle, causing environmental pollution and a harsh working environment.

[0023] Overflow port 3 is sealed by water inside separation box 1. Due to the water seal, gas cannot escape from overflow port 3. During normal drilling, it is a first-level blowout prevention (minor blowout). Coal slag settles at the bottom of separation box 1, and gas rises to the top of separation box 1 and is discharged through extraction pipe 7. Gas extraction main pipe 8 continuously extracts gas from separation box 1 under negative pressure, and gas will not overflow.

[0024] The composite blowout preventer 10 is also equipped with a locking and sealing device 14. The locking and sealing device 14 is a blowout preventer gate. The locking and sealing device 14 can also be pneumatically controlled. When a secondary blowout (strong blowout) occurs, the operator can judge whether a strong blowout has occurred by observing whether there is rapid water overflow at the overflow port 3 of the separation box 1 or by the noise generated by the blowout. When the locking and sealing device 14 locks the drill rod through the through hole, it can seal the gap between the composite blowout preventer 10 and the drill rod to prevent gas from overflowing.

[0025] The buffer air inlet pipe 15 is connected to the composite blowout preventer 10. The buffer air inlet pipe 15 is equipped with valve 16, which is a pneumatic butterfly valve. It can respond quickly when a secondary blowout preventer (strong blowout) occurs. The buffer air inlet pipe 15 is connected to a buffer bag 17, which is connected to a buffer exhaust pipe 18. The buffer exhaust pipe 18 extends and connects to the downhole gas drainage main pipe 8. When a secondary blowout preventer (strong blowout) occurs, valve 16 opens the buffer air inlet pipe 15 to release the high-pressure gas in the blowout preventer, thereby achieving two-stage blowout prevention. A stainless steel drain valve 21 is installed at the bottom of the buffer bag 17 to drain excess water.

[0026] The pneumatic butterfly valve and the locking and sealing device are connected to the air source, which is synchronously controlled by the pneumatic switch 19, so that one action can be controlled at the same time.

[0027] Working principle:

[0028] The first-level blowout prevention system utilizes the composite blowout preventer 10 and the water seal design of the separator 1. During normal drilling, for minor blowouts, the amount of gas ejected is small, and the separator 1 has a certain buffer volume. Furthermore, the extraction pipe 7 is connected to the negative-pressure downhole gas extraction main pipe 8, continuously extracting and releasing gas from the separator 1. Although the pressure inside the separator 1 increases slightly, it will not overflow, allowing for continuous drilling with blowout prevention. The second-level blowout prevention system, in the event of a strong blowout, firstly, uses the composite blowout preventer 10 to buffer the blowout velocity and reduce the blowout pressure. The drilling operator observes whether there is any gas leaking from the overflow port 3 of the separator 1. The operator determines whether a secondary blowout preventer (high-pressure blowout) has occurred based on rapid water overflow or noise generated by the nozzle. When a secondary blowout preventer (high-pressure blowout) occurs, the operator operates the pneumatic switch 19 at hand, and three valves operate simultaneously: First, the locking and sealing device 14 is opened to prevent gas leakage from the gap between the composite blowout preventer 10 and the drill rod; second, valve 13 on the water slag discharge pipe 11 is closed to limit gas leakage from the water slag discharge pipe 11; third, valve 16 on the buffer air inlet pipe 15 is opened to release the high-pressure gas inside the blowout preventer, thus achieving two-stage blowout prevention.

[0029] The semi-automatic two-stage blowout prevention device for gas buffering and water-slag separation is used in coal mines for separating water, slag, and gas, and for gas buffering and blowout prevention when using pressurized water to discharge gas through perforated holes. It achieves two-stage blowout prevention. The operator manually controls the pneumatic switch 19 according to the safety requirements of the gas content. When the pneumatic switch 19 is opened, the valve 13 on the water-slag discharge pipe 11, the valve 16 on the buffer air inlet pipe 15, and the locking and sealing device 14 are simultaneously closed or opened, quickly realizing semi-automatic control of the gas discharge inlet and outlet, achieving control of the gas concentration below the safe value, with timely response and low cost and technical dependence.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-automatic two-stage blowout preventer for separating gas and water slurry, characterized in that, include: The separator has an overflow outlet for draining water and an exhaust outlet for venting gas. A composite blowout shield guides the mixture of water, slag, and gas discharged from the borehole into the separation tank. A buffer air inlet pipe is connected to the composite blowout preventer. A valve is installed on the buffer air inlet pipe. The valve opens during the secondary blowout preventer to relieve the pressure of the high-pressure gas inside the blowout preventer.

2. The gas buffer water cake separation semi-automatic two-stage blowout prevention device according to claim 1, characterized in that, The separation box has a slag discharge port, and a valve is installed at the slag discharge port.

3. The semi-automatic two-stage blowout prevention device for gas buffering and slag separation according to claim 1, characterized in that, The buffer air intake pipe is connected to a buffer bag.

4. The semi-automatic two-stage blowout prevention device for gas buffer water-slag separation according to claim 3, characterized in that, The bottom of the cushioning bag is equipped with a stainless steel drain valve.

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