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CN-121976839-A - On-site dust removal device for coal mine transportation

CN121976839ACN 121976839 ACN121976839 ACN 121976839ACN-121976839-A

Abstract

The invention discloses a field dust removing device for coal mine transportation, which comprises a pressure-bearing turning plate, a push rod, a hydraulic cylinder, a water storage tank and an atomization nozzle group. The pressure-bearing turning plate is hinged in the blanking funnel, the coal flow impacts the pressure-bearing turning plate to enable the pressure-bearing turning plate to deflect around the hinge shaft, the hydraulic cylinder piston is driven by the push rod to convert impact kinetic energy into water pressure, pressurized water enters the compression air chamber of the water storage tank, and after the air chamber stores energy, water is continuously supplied to the atomizing nozzle group to realize spraying dust fall. The pressure-bearing turning plate is reset by means of the balancing weight, and the return stroke of the hydraulic cylinder automatically supplements water. The whole process is independent of electric drive, and the spraying and dust production process is triggered synchronously.

Inventors

  • SUN SHOUBEI

Assignees

  • 山西金兑科技有限公司

Dates

Publication Date
20260505
Application Date
20260408

Claims (10)

  1. 1. The self-driven spraying dust settling device for the coal mine transfer point is characterized by comprising a pressure-bearing turning plate (2), a pressure-bearing plate and a dust collecting device, wherein the pressure-bearing turning plate is arranged inside a blanking funnel (1) in a swinging way through a hinge shaft (3), and the free end of the pressure-bearing turning plate (2) extends into a coal flow falling path to bear coal flow impact; the device comprises a counterweight (4) fixed at one end of a pressure-bearing turning plate (2) close to a hinged shaft (3) and positioned at one side deviating from a coal flow impact surface, a reset moment opposite to the coal flow impact deflection direction is generated by the counterweight (4) relative to the hinged shaft (3), a push rod (5) with the inner end hinged at one side of the pressure-bearing turning plate (2) deviating from the coal flow impact surface and spaced from the hinged shaft (3), the push rod (5) penetrates through the wall of a blanking funnel (1) to extend out, a hydraulic cylinder body (7) arranged outside the blanking funnel, a hydraulic cylinder piston rod (8) hinged with the outer end of the push rod, a hydraulic cylinder piston (9) divides the inner cavity of the hydraulic cylinder body into a rod cavity, a water outlet and a water supplementing port are arranged on the rod cavity, a water storage tank (14) with the water inlet communicated with the water outlet through a pressure pipeline (13), a water body area and a sealing air chamber positioned above the water body area liquid level are arranged in the inner cavity, an atomizing nozzle set (17) communicated with a water outlet of the water storage tank through an outlet pipeline (16) and arranged near the blanking area of the blanking funnel, wherein the pressure-bearing turning plate deflects the pressure-bearing around the hinged shaft, the push rod drives the piston of the hydraulic cylinder to extrude the water body in the rod cavity, the pressurized water body enters the compressed air chamber of the water storage tank through the pressure pipeline, and the compressed air pushes the water body in the water storage tank to be atomized and sprayed out through the outlet pipeline to the atomizing nozzle group.
  2. 2. The self-driven spray dust settling device for the coal mine transfer point according to claim 1, wherein a water drainage check valve (11) is arranged in the pressure pipeline, the water drainage check valve only allows water to flow from a water outlet of the hydraulic cylinder to the water storage tank and prevents water in the water storage tank from reversely flowing back to the hydraulic cylinder, the water supplementing port is connected to an external water source through a water supplementing pipeline (19), a water supplementing check valve (18) is arranged in the water supplementing pipeline, the water supplementing check valve only allows water to flow from the external water source to the rod cavity, the water in the rod cavity is prevented from flowing to the external water source through the water supplementing pipeline when the hydraulic cylinder piston moves forward, negative pressure is formed in the rod cavity when the hydraulic cylinder piston moves backward, and the water in the external water source is sucked into the rod cavity through the water supplementing pipeline and the water supplementing check valve under the action of a pressure difference to complete water supplementing.
  3. 3. The self-driven spray dust settling device for coal mine transfer points according to claim 2, wherein a throttle valve (12) is connected in series in the pressure pipeline between the water drainage check valve and the water storage tank along the water flow direction, and the throttle valve is used for adjusting the flow rate of water flowing into the water storage tank from the hydraulic cylinder so as to control the compression rate of gas in the air chamber.
  4. 4. The self-driven spray dust settling device for coal mine transfer points according to claim 1, wherein a guide sealing sleeve (6) is arranged at the position of the push rod penetrating through the blanking funnel wall, the guide sealing sleeve is fixedly embedded in the blanking funnel wall, an inner hole of the guide sealing sleeve is in clearance fit with the outer diameter of the push rod to restrain radial displacement of the push rod, a sealing groove is arranged on the inner hole wall surface of the guide sealing sleeve, a sealing ring is embedded in the sealing groove, the inner circle surface of the sealing ring is elastically abutted against the outer surface of the push rod, and dynamic sealing is formed between the push rod and the guide sealing sleeve to prevent dust and water vapor in the blanking funnel from leaking along the push rod.
  5. 5. The self-driven spray dust settling device for the coal mine transfer point according to claim 1, wherein two coaxial trunnions are fixed on the outer side wall of the hydraulic cylinder body, the axes of the trunnions are parallel to the hinge shaft, a U-shaped bracket (10) is fixed on the outer wall of the blanking funnel, a bearing seat matched with the trunnions is arranged on the U-shaped bracket, the trunnions are arranged in the bearing seat and can rotate around the axes of the trunnions, so that the hydraulic cylinder body can swing in a vertical plane to adapt to the change of the movement direction of the push rod, and the axes of the hydraulic cylinder body are consistent with the movement direction of the push rod.
  6. 6. The self-driven spray dust settling device for the coal mine transfer point according to claim 1, wherein an elastic air bag (15) is arranged in the water storage tank, the elastic air bag is arranged in the top area of the inner cavity of the water storage tank, air is sealed in the elastic air bag, the outer part of the elastic air bag is in contact with water in the water storage tank, the air in the air bag is completely isolated from the water by the elastic air bag, when the pressurized water enters the water storage tank, the water extrudes the elastic air bag to enable the air in the air bag to be compressed, the volume is reduced and the pressure is increased, and during the intermittent period of coal flow impact, the compressed air in the elastic air bag expands to push the wall of the elastic air bag to expand outwards, the pressure is exerted on the water through the wall of the elastic air bag, and the water is pushed to flow to the atomizing nozzle group through the outlet pipeline.
  7. 7. The self-driven spraying dust settling device for the coal mine transfer point according to claim 1, wherein a limit stop (20) is fixed on the inner wall of the blanking funnel, the limit stop is located in a movement path of the bearing turning plate in the deflection direction, when the bearing turning plate deflects to a preset maximum angle, the plate surface of the bearing turning plate abuts against the limit stop to prevent the bearing turning plate from continuing to deflect, an initial position limit stop is arranged at the hinge shaft, and the bearing turning plate abuts against the initial position limit stop when reset under the action of a balancing weight, so that the bearing turning plate is restrained at the initial position.
  8. 8. The self-driven spraying dust fall device for the coal mine transfer point according to claim 1, wherein the face of the pressure-bearing turning plate, which faces the coal flow impact, is provided with a wear-resistant lining plate (21), the wear-resistant lining plate is detachably connected to the face of the pressure-bearing turning plate through bolts, and the wear-resistant lining plate directly bears the coal flow impact and friction.
  9. 9. The self-driven spray dust settling device for coal mine transfer points according to claim 1, wherein the atomizing nozzle group comprises a plurality of atomizing nozzles arranged along the axis direction of the hinge shaft, and the adjacent atomizing nozzles are kept at intervals so that the spray coverage areas of the atomizing nozzles are mutually connected in the blanking area, and a continuous water mist curtain is formed along the width direction of the blanking funnel so as to cover the whole blanking section.
  10. 10. The self-driven spray dust settling device for coal mine transfer points according to claim 6, wherein compressed gas is pre-filled in the elastic air bag, so that the elastic air bag has preset pressure in an initial state, and the existing gas pressure in the elastic air bag is overlapped with the extrusion action of the newly added water body when the coal flow is impacted for the first time, so that the response time of spray establishment is shortened.

Description

On-site dust removal device for coal mine transportation Technical Field The invention relates to the technical field of underground coal mine dust treatment, in particular to an on-site dust removal device for coal mine transportation. Background The coal mine transfer point is one of areas with higher underground dust concentration, and in the process that coal flows are transferred from an upper belt to a lower belt through a blanking funnel, a large amount of dust is dissipated due to collision between coal blocks and between the coal blocks and the blanking funnel wall, and the health and safety of underground operators are threatened. The conventional transfer point spray dust removal system generally adopts a scheme of matching an electromagnetic valve with a high-pressure water pump, wherein the high-pressure water pump continuously operates to maintain pipeline pressure, and when the belt coal conveying is detected, the electromagnetic valve is opened, and a nozzle sprays dust fall. However, the scheme has the following defects that firstly, the electromagnetic valve and the high-pressure water pump are driven by electric power, the underground power supply environment is complex, the spraying system is disabled when power supply fluctuates or fails, dust cannot be restrained in the transfer process, secondly, the high-pressure water pump still needs to continuously operate in the blanking-free period to maintain pipeline pressure, unnecessary electric energy consumption is caused, thirdly, the electromagnetic valve is frequently opened and closed in the underground environment with dust, a valve core sealing element is prone to aging failure caused by dust erosion and wet corrosion, water leakage or clamping stagnation is caused, and the reliability of the system is reduced. Disclosure of Invention The invention provides a coal mine transfer point self-driven spraying dust settling device, which solves the technical problems that an electric control spraying system in the related art depends on electric power driving, fails under abnormal power supply conditions, continuously operates during a blanking-free period of a high-pressure water pump to cause energy consumption waste, and an electromagnetic valve is frequently opened and closed in a dust-containing wet underground environment to cause ageing and failure of a valve core sealing element. The invention discloses a self-driven spraying dust-settling device for a coal mine transfer point, which comprises a pressure-bearing turning plate, a balancing weight, a push rod, a hydraulic cylinder body, a water storage tank and an atomization nozzle group. The automatic coal flow atomizing device comprises a blanking funnel, a pressure-bearing turning plate, a balancing weight, an atomizing nozzle group, a pushing rod, a hydraulic cylinder body, a water tank, a water outlet and an atomizing nozzle group, wherein the pressure-bearing turning plate is arranged in the blanking funnel in a swinging way through a hinge shaft, the free end of the pressure-bearing turning plate extends into a coal flow falling path to bear coal flow impact, the balancing weight is fixed at one end of the pressure-bearing turning plate, which is close to the hinge shaft, and is positioned at one side, which is away from a coal flow impact surface, of the blanking funnel, the balancing weight generates a reset moment opposite to the coal flow impact deflection direction relative to the hinge shaft, the inner end of the pushing rod is hinged at one side, which is away from the coal flow impact surface, and is spaced from the hinge shaft, the pushing rod penetrates through the blanking funnel wall to extend to the outside, the hydraulic cylinder body is arranged outside the blanking funnel, a hydraulic cylinder body is hinged with the outer end of the pushing rod, the hydraulic cylinder body separates the inner cavity of the hydraulic cylinder body into a rod cavity, the rod cavity is provided with a water outlet and a water supplementing port, the water tank is communicated with the water outlet through a pressure pipeline, the water tank cavity is provided with the water body area and a sealing air chamber positioned above the water level of the water body area, the water tank is provided with the water outlet and a sealing air chamber above the water level, the water tank is sprayed into the water tank through the water outlet and the atomizing nozzle group through the water outlet, and the atomizing nozzle group is arranged near the blanking area. The hydraulic cylinder piston is characterized in that a hydraulic cylinder piston is arranged in the hydraulic cylinder piston, a water outlet check valve is arranged in the pressure pipeline, the water outlet check valve only allows water to flow from a water outlet of the hydraulic cylinder to a water storage tank and prevents water in the water storage tank from reversely flowing back to the hydraulic cylinder, a water supplem