Air and water pressure hole bottom dust removal device of down-the-hole percussion drill

Abstract

The utility model provides a down-the-hole percussion drill air and water pressure hole bottom dust removal device which comprises a main air pipe, a branch air pipe, a water pipe, an air and water mixing chamber, a safety exhaust pipe and a pressure air and water pipe. A main path of the main air pipe is connected with a dust removal air duct of the drilling machine, and a main control valve is mounted on the main air pipe; the branch air pipe is a branch of the main air pipe and is provided with a branch air pipe valve, and the tail end of the branch air pipe is communicated with a first inlet of the air-water mixing chamber; the water pipe is communicated with a second inlet of the air-water mixing chamber through a water pipe valve; the safety exhaust pipe and the exhaust valve are arranged at the upper end of the air-water mixing chamber; an outlet of the air-water mixing chamber is communicated with a compressed air-water pipe, an output valve is installed on the compressed air-water pipe, and the compressed air-water pipe is used for providing air-water mixed fluid for a dust removal air duct of the drilling machine. The device has the advantages that wind-water linkage is achieved, the dust removal effect is remarkably improved, and the control flexibility is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of water and electricity, mine, geotechnical engineering drilling construction equipment, and concretely relates to a down-the-hole hammer air and water pressure hole bottom dust removal device. BACKGROUND

[0002] When drilling with the down-the-hole hammer, the drilling efficiency is high, but a large amount of dust is easily generated, the dust cannot be discharged in time when operating in a closed space, the operating personnel are in long-term contact with productive dust, and diseases such as rhinitis, pharyngitis and bronchitis are easily caused, and serious diseases are easily caused pneumoconiosis.

[0003] At present, hole bottom cuttings and dust are mainly discharged through single air or water movement. The traditional air movement dust removal has the problems of serious dust diffusion and poor working environment; although the water movement dust removal can inhibit dust raising, the hole bottom cuttings are prone to cause poor discharge due to mud viscosity.

[0004] In addition, the existing air and water combined dust removal device mainly adopts branch air supply and water supply, the system is complex and pressure matching is difficult, and efficient collaborative operation is difficult to realize.

[0005] In the prior art, the utility model with the application number 202221031733.8 and the name of down-the-hole hammer hole dust removal device of the utility model patent combines the air inlet pipe and the water inlet pipe into a mixed pipe output, which has certain advantages compared with the traditional separate output, but this control method is relatively extensive and can be further optimized and transformed. UTILITY MODEL CONTENTS

[0006] The utility model aims at the deficiencies of the prior art, and provides a down-the-hole hammer air and water pressure hole bottom dust removal device with air and water linkage, significantly improved dust removal effect and higher control flexibility.

[0007] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme that a down-the-hole hammer air and water pressure hole bottom dust removal device, comprising a main air pipe, a branch air pipe, a water pipe, an air and water mixing chamber, a safety exhaust pipe and a pressure air and water pipe;

[0008] The main road of the main air pipe is connected with the dust removal air duct of the drilling machine, and a main control valve is installed on the main air pipe;

[0009] The branch air pipe is a branch of the main air pipe and is provided with a branch air pipe valve, and the tail end of the branch air pipe is communicated with the first inlet of the air and water mixing chamber;

[0010] The water pipe is communicated with the second inlet of the air and water mixing chamber through a water pipe valve;

[0011] The upper end of the air and water mixing chamber is provided with the safety exhaust pipe and the exhaust valve;

[0012] The outlet of the air-water mixing chamber is communicated with a pressurized air-water pipe, and an output valve is installed on the pressurized air-water pipe.

[0013] Preferably, the tail end of the pressurized air-water pipe is communicated with the main air pipe.

[0014] Preferably, the connection position of the pressurized air-water pipe and the main air pipe is located on the downstream side of the main control valve.

[0015] Preferably, the air pressure of the branch air pipe is greater than or equal to 1.2 MPa.

[0016] Preferably, the main control valve, the branch air pipe valve, the water pipe valve, the exhaust valve and the output valve are all electric control valves.

[0017] Preferably, the volume of the air-water mixing chamber is greater than or equal to 100 L.

[0018] Preferably, the branch air pipe is a φ25 high-pressure air pipe.

[0019] Preferably, the pressurized air-water pipe is a φ25 air-water pipe.

[0020] The utility model discloses relative prior art has substantial characteristics and progress, specifically speaking, the utility model has the following advantages:

[0021] 1. The application designs an air-water mixing chamber, and the pressurized air flow is mixed with water, and then is discharged from the pressurized air-water pipe to form air-water mixed fluid, which enters the dust removal air duct of the drilling machine to treat the generated dust. This mixing method has higher mixing degree and better mixing uniformity compared with direct mixing.

[0022] 2. Further, after the main air pipe and the pressurized air-water pipe are finally connected, they enter the dust removal air duct of the drilling machine together. The driving power in the air-water mixing chamber is all from the air duct pressure, which ensures the same pressure control of the air duct and the waterway, makes the mixing degree of air and water more balanced, and the amount of water carried by air is automatically adjusted based on the air pressure, avoiding the problem of insufficient matching degree caused by excessive water pressure or air pressure. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a principle diagram of the air-water same pressure hole bottom dust removal device of the down-the-hole percussion drilling machine in the utility model.

[0024] In the drawing: 1. Main air pipe; 2. Branch air pipe; 3. Branch air pipe valve; 4. Water pipe; 5. Water pipe valve; 6. Exhaust valve; 7. Safety exhaust pipe; 8. Output valve; 9. Pressurized air-water pipe; 10. Main control valve; 11. Air-water mixing chamber. DETAILED DESCRIPTION

[0025] The technical scheme of the utility model will be described in further detail below with specific embodiments.

[0026] As Figure 1 shown, a pneumatic drill rig air-water same pressure hole bottom dust removal device, including main air pipe 1, branch air pipe 2, water pipe 4, air-water mixing chamber 11, safety exhaust pipe 7 and pressure air-water pipe 9.

[0027] Specifically, in the embodiment, the pipe diameter of main air pipe 1 is φ50 air pipe, the pipe diameter of branch air pipe 2 is φ25 air pipe, and the pipe diameter of safety exhaust pipe 7 and pressure air-water pipe 9 is both φ25 pipe, and the unit of the above pipe diameter is mm.

[0028] The main road of main air pipe 1 is connected to the dust removal air duct of the drill rig, and a main control valve 10 is installed on the main air pipe as the output control of the main road air path.

[0029] The branch air pipe 2 is a branch of the main air pipe 1 and is provided with a branch air pipe valve 3, and the tail end of the branch air pipe 2 is communicated with the first inlet of the air-water mixing chamber 11, and in use, the branch air pipe 2 provides driving power and empties the air-water mixing chamber 11, and in the embodiment, the air pressure of the branch air pipe 2 is controlled to be above 1.2 MPa.

[0030] The water pipe 4 is communicated with the second inlet of the air-water mixing chamber 11 through a water pipe valve 5, and is used to provide water.

[0031] The upper end of the air-water mixing chamber 11 is provided with the safety exhaust pipe 7 and an exhaust valve 6, and the main function of the pipeline is to open the valve and exhaust the air in the interior when water is introduced into the air-water mixing chamber 11, and in the embodiment, the volume of the air-water mixing chamber is ≥100L.

[0032] The outlet of the air-water mixing chamber 11 is communicated with the pressure air-water pipe 9, the output valve 8 is installed on the pressure air-water pipe 9, and the pressure air-water pipe 9 is used to provide air-water mixed fluid for the dust removal air duct of the drill rig, and in the embodiment, the tail end of the pressure air-water pipe 9 is communicated with the main air pipe 1, and the connection position of the pressure air-water pipe 9 and the main air pipe 1 is located on the downstream side of the main control valve 10.

[0033] In other embodiments, the pressure air-water pipe 9 can be directly connected to the dust removal air duct of the drill rig for dust removal.

[0034] Working process is briefly described as follows:

[0035] Before use, open the water pipe valve 5 and the exhaust valve 6, and close other valves, and fill the air-water mixing chamber 11 with water.

[0036] During construction, the water pipe valve 5 and the exhaust valve 6 are closed, the branch air pipe valve 3, the output valve 8 and the main control valve 10 are opened, part of the airflow is directly transmitted to the drilling machine along the main road, and the other part of the airflow enters the branch air pipe 2 with a smaller diameter and provides air pressure for the air-water mixing chamber. Under the action of air pressure, air and water are mixed in the air-water mixing chamber, and under the action of air pressure, they are discharged into the pressure air-water pipe, and finally mixed with the air in the main air pipe, and finally output to the dust removal pipeline of the drilling machine for dust removal.

[0037] When drilling is stopped, the main control valve 10 of the main air pipe 1 is closed first, and then the output valve 8 on the pressure air-water pipe 9 is closed.

[0038] Since all the pressure comes from the air pressure, the air-water mixing pressure also depends on the size of the air pressure, and it is not necessary to test and determine the optimal air pressure, water pressure and water volume as required by the traditional dust removal method to achieve the dust removal effect.

[0039] The scheme is based on the experiment of Jiufengshan Pumped Storage Power Station, which is located in Huangshui Village, Huixian City, Xinxiang City, Henan Province. Most of the drilling construction parts are in narrow and closed caverns, including plant drainage gallery drainage hole drilling, drainage gallery drainage hole drilling of the water diversion system, consolidation grouting drilling of the water diversion system, etc. The smallest cavern size is 3m×3m city gate type, and the largest cavern size is 5.61~6.18m×6.9~7.6m horseshoe shape. The drainage hole drilling is about 237,000m, and the consolidation grouting drilling is about 280,000m. The drilling engineering quantity is large. When the rotary drilling is used, the drilling efficiency cannot meet the time limit requirement. When the percussion drilling is used, the drilling efficiency is high, but a large amount of dust is easily produced. In the closed and narrow underground chamber, dust is not easy to discharge. By using a downhole percussion drilling machine hole bottom dust removal device, dust can be effectively removed, the working environment of the operating personnel is improved, the water consumption is reduced to meet the engineering environmental protection requirements, and the drilling efficiency also meets the time limit requirement.

[0040] Finally, it should be noted that: the above has made a detailed description of the preferred embodiments of the patent, but the patent is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the art without departing from the purpose of the patent.

Claims

1. A dust removal device for the bottom of a down-the-hole impact drill under the same air and water pressure, characterized in that: This includes main air ducts, branch air ducts, water pipes, air-water mixing chambers, safety exhaust pipes, and pressurized air-water pipes; The main air duct is connected to the dust removal air duct of the drilling rig, and a main control valve is installed on the main air duct; The branch duct is a branch of the main duct and is equipped with a branch duct valve. The end of the branch duct is connected to the first inlet of the ventilation and water mixing chamber. The water pipe is connected to the second inlet of the ventilation and water mixing chamber via a water pipe valve; The safety exhaust pipe and exhaust valve are installed at the upper end of the feng shui mixing chamber; The outlet of the air-water mixing chamber is connected to a pressurized air-water pipe, and an output valve is installed on the pressurized air-water pipe. The pressurized air-water pipe is used to provide air-water mixing fluid to the dust removal duct of the drilling rig.

2. The down-the-hole impact drilling rig ventilation and water pressure bottom dust removal device according to claim 1, characterized in that: The end of the pressurized air pipe is connected to the main air pipe.

3. The down-the-hole impact drilling rig ventilation and water pressure bottom dust removal device according to claim 2, characterized in that: The connection point between the pressurized air duct and the main air duct is located downstream of the main control valve.

4. The down-the-hole impact drilling rig ventilation and water pressure bottom dust removal device according to claim 3, characterized in that: The air pressure of the branch duct is ≥1.2MPa.

5. The down-the-hole impact drilling rig ventilation and water pressure bottom dust removal device according to claim 4, characterized in that: The main control valve, branch duct valve, water pipe valve, exhaust valve, and output valve are all electrically controlled valves.

6. The down-the-hole impact drilling rig ventilation and water pressure bottom dust removal device according to claim 5, characterized in that: The volume of the feng shui mixing chamber is ≥100L.

7. The down-the-hole impact drilling rig ventilation and water pressure bottom dust removal device according to claim 6, characterized in that: The branch duct is a φ25 high-pressure duct.

8. The down-the-hole impact drilling rig ventilation and water pressure bottom dust removal device according to claim 7, characterized in that: The pressurized air duct is a φ25 air duct.

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