Mining orifice blowout prevention and dust falling device

Abstract

The utility model discloses a blowout prevention and dust reduction device for a mining orifice, and relates to the technical field of coal mine tunnel drilling construction. The orifice pipe is inserted in the orifice position, water, gas or coal dust discharged from the orifice position can only be discharged along the orifice pipe, the outer end of the orifice pipe is communicated with the filter pipe, the spraying space of the water, the gas or the coal dust is prolonged and enlarged, meanwhile, the blowout prevention plug is arranged at the outer end of the filter pipe, and the water and the gas are isolated and blocked in the area of the filter pipe. A gas collecting pipe sleeves the outer side of the filter pipe, so that the water, the gas or the coal dust in the filter pipe enters the gas collecting pipe through a filter pipe through hole and is discharged through an outlet of the gas collecting pipe and a pumping and discharging pipeline, the buffer space of the water, the gas or the coal dust is further increased, and the flow speed of the water, the gas or the coal dust sprayed out of an orifice is greatly reduced; therefore, personnel injury caused by direct injection of water, gas or coal dust is avoided, and meanwhile, the problems of environment pollution caused by coal dust overflowing in the drilling process, gas concentration over-limit alarm on a construction site, pneumoconiosis of operators and the like are avoided.

Description

Technical Field

[0001] This application relates to the technical field of coal mine roadway drilling construction, and in particular to a mine orifice anti-blowout and dust reduction device. Background Art

[0002] During the process of a drill rig drilling into mine rock or coal body, a large amount of coal dust is generated, and gas also gushes out from the orifice. If the gas content and gas pressure in the original coal body are large, it is extremely easy to occur a blowout accident where a large amount of gas carrying coal dust gushes out from the orifice in a concentrated manner. The coal dust accumulating in the roadway may even cause a coal dust explosion accident, and in severe cases, it may also cause casualties, which poses a great threat to the safety of construction workers. On the other hand, whether using hydraulic slag discharge or pneumatic slag discharge during the drilling construction process, coal dust will be generated to varying degrees, especially pneumatic slag discharge generates the most serious coal dust. The gushing out of a large amount of coal dust will cause construction workers to suffer from pneumoconiosis. Content of the Utility Model

[0003] The utility model aims to solve the problems of blowout and coal dust scattering easily occurring at the orifice position during the drilling process, and thus provides a device that can effectively avoid blowout accidents and reduce dust at the same time.

[0004] The technical solution adopted by the utility model to solve the above problems is as follows:

[0005] A mine orifice anti-blowout and dust reduction device includes an orifice pipe, a filter pipe, and an anti-blowout plug. The orifice pipe is inserted at the orifice position of the drill hole of the drill rig. The outer end of the orifice pipe is communicated with the filter pipe. The outer end of the filter pipe is connected with an anti-blowout plug. The drill rod of the drill rig passes through the anti-blowout plug, the filter pipe, and the orifice pipe and extends towards the inner end of the orifice. A number of through holes are provided on the filter pipe. A gas collecting pipe is sleeved outside the filter pipe. At least one outlet is provided on the gas collecting pipe. The outlet is used to connect to an exhaust pipeline. The anti-blowout plug is used to isolate the water, gas, or coal dust gushing out from the orifice in the filter pipe area. The water, gas, or coal dust in the filter pipe area is discharged through the through holes, the outlet of the gas collecting pipe, and the exhaust pipeline.

[0006] The utility model adopting the above technical solution, compared with the prior art, has the following beneficial effects:

[0007] The utility model inserts an orifice pipe at the orifice position, so that the water, gas or coal dust discharged from the orifice position can only be discharged along the orifice pipe. The outer end of the orifice pipe is communicated with a filter pipe to extend and expand the spraying space of water, gas or coal dust. At the same time, an anti-spray plug is arranged at the outer end of the filter pipe to isolate and obstruct water and gas in the filter pipe area, avoiding the overflow of water, gas or coal dust. A gas collecting pipe is sleeved outside the filter pipe, so that the water, gas or coal dust in the filter pipe enters the gas collecting pipe through the through holes of the filter pipe and is discharged through the outlet of the gas collecting pipe and the exhaust pipeline, thereby further increasing the buffer space of water, gas or coal dust, greatly reducing the flow rate of the water, gas or coal dust ejected from the orifice, thus avoiding personal injury caused by the direct spraying of water, gas or coal dust, and at the same time avoiding the environmental pollution caused by the overflow of coal dust during the drilling process, resulting in the over-limit alarm of the gas concentration at the construction site and the problem that the operator suffers from pneumoconiosis, etc.

[0008] As a preference, a further technical solution of the utility model is as follows:

[0009] At least one water mist nozzle is arranged on the gas collecting pipe, and the water mist nozzle is used for spraying water into the gas collecting pipe to reduce dust. By spraying water mist into the gas collecting pipe through the water mist nozzle, the volume and weight of the coal dust in the gas collecting pipe are increased, so as to achieve the purpose of dust reduction.

[0010] The diameters of the orifice pipe, the filter pipe and the gas collecting pipe gradually increase, and the flow rates of the water, gas or coal dust ejected from the orifice flowing through the orifice pipe, the filter pipe and the gas collecting pipe gradually decrease. Through the above structure, the flow rate of water, gas or coal dust can be gradually reduced, so as to achieve the purpose of anti-spray.

[0011] Flange plates are respectively sleeved at both ends of the filter pipe, and the outer ring walls of the two flange plates are fixed to the inner walls of both ends of the gas collecting pipe. Flange plates are sleeved on the outer end of the orifice pipe and the anti-spray plug. The flange plate at the inner end of the filter pipe is bolted to the flange plate at the outer end of the orifice pipe, and the flange plate at the outer end of the filter pipe and the flange plate of the anti-spray plug are bolted.

[0012] Exits are respectively arranged at the upper end and the lower end of the gas collecting pipe, and the upper exit and the lower exit are selectively set as reduced-diameter ports, and the reduced-diameter ports are used for connecting with the exhaust pipeline.

[0013] The anti-spray plug includes an anti-spray pipe, and a plurality of bristles are radially arranged in the anti-spray pipe, and the front ends of the bristles abut against the drill pipe. Most of the pulverized coal is isolated and blocked in the filter pipe area through the bristles. At the same time, by controlling the forward or backward movement of the drill pipe, the coal dust attached to the drill pipe can be cleaned by the bristles, so that the coal dust falls into the filter pipe and is discharged through the through holes.

[0014] The anti-spray plug includes an anti-spray pipe, and a rubber ring or a packing ring is coaxially fixed in the anti-spray pipe, and the inner ring of the rubber ring or the packing ring abuts against the drill pipe. Through the rubber ring or the packing ring, the outer port of the filter pipe is completely closed, and the water, gas or coal dust ejected from the orifice is completely isolated in the filter pipe area.

[0015] A skeleton air duct is sleeved on the upper outlet and the lower outlet, and the sleeved positions of the upper outlet and the lower outlet and the skeleton air duct are fixed by an air duct clamp. The distal end of the skeleton air duct is selectively set to be constricted. One end of the skeleton air duct is fastened on the upper outlet or the lower outlet of the gas collecting pipe by the air duct clamp. When coal dust is discharged through the skeleton air duct, part of the coal dust can be deposited on the inner wall of the skeleton air duct, so that the separation of gas, liquid and solid can be effectively carried out.

[0016] The orifice tube and the orifice outer wall are fixedly connected by a curing agent. The position of the orifice tube is fixed, and the device is further fixed at the orifice position. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of Embodiment 1 of the present application;

[0018] Figure 2 is a partial structural split diagram of Embodiment 1 of the present application;

[0019] Figure 3 is a partial structural split diagram of other parts of Embodiment 1 of the present application;

[0020] Figure 4 is a sectional view of Embodiment 1 of the present application;

[0021] Figure 5 is a three-dimensional structural schematic diagram of Embodiment 2 of the present application;

[0022] Figure 6 is a sectional view of the packing ring structure of Embodiment 3 of the present application;

[0023] Figure 7 is a sectional view of the rubber ring structure of Embodiment 3 of the present application;

[0024] In the figure: 1, orifice tube; 11, first flange; 12, curing agent; 2, gas collecting pipe; 21, water mist nozzle; 22, upper outlet; 23, lower outlet; 3, anti-spray plug; 31, anti-spray pipe; 32, fourth flange; 33, brush bristles; 34, packing ring; 35, rubber ring; 4, drill pipe; 5, skeleton air duct; 51, air duct clamp; 6, filter pipe; 61, through hole; 62, third flange; 63, second flange; 7, reduced diameter port; 8, PE pipe. Detailed Embodiments

[0025] The following further describes the present invention with reference to embodiments, and the purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0026] Refer to Figures 1-7, Embodiment 1 of the present application discloses a mine orifice anti - spray and dust - reduction device, which is applied to the rock mass or coal body in the mine. It includes an orifice pipe 1, a filter pipe 6, and an anti - spray plug 3. The outer diameter of the orifice pipe 1 is the same as the aperture of the orifice of the drill hole of the drill rig. The orifice pipe 1 is inserted into the orifice, and the connection position between the orifice pipe 1 and the outer wall of the orifice is fixedly connected by a curing agent 12. The curing agent 12 preferably uses cement, so as to firmly fix the orifice pipe 1 at the orifice position. A first flange 11 is fixedly sleeved at the outer end of the orifice pipe 1, and a second flange 63 is fixedly sleeved at the inner end of the filter pipe 6. The first flange 11 and the second flange 63 are fixed with bolts to coaxially and fixedly connect the orifice pipe 1 and the filter pipe 6. An anti - spray plug 3 is connected to the outer end of the filter pipe 6. A third flange 62 is fixedly sleeved at the outer end of the filter pipe 6, and a fourth flange 32 is fixedly sleeved at the inner end of the anti - spray plug 3. The third flange 62 and the fourth flange 32 are fixed with bolts to coaxially fix the outer end of the filter pipe 6 and the anti - spray plug 3. A number of radial and equidistant through - holes 61 are provided on the side wall of the filter pipe 6. A coaxial gas - collecting pipe 2 is sleeved outside the filter pipe 6. The outer diameter of the second flange 63 is equal to the inner diameter of the inner end of the gas - collecting pipe 2, and the outer wall of the outer ring of the second flange 63 is fixed to the inner wall of the inner end of the gas - collecting pipe 2. The outer diameter of the third flange 62 is equal to the inner diameter of the outer end of the gas - collecting pipe 2, and the outer wall of the outer ring of the third flange 62 is fixed to the inner wall of the outer end of the gas - collecting pipe 2. At least one outlet is provided on the gas - collecting pipe 2, and the outlet is used to connect the exhaust pipeline. The drill rod 4 of the drill rig sequentially passes through the channel formed among the anti - spray plug 3, the filter pipe 6, and the orifice pipe 1 and drills into the rock mass or coal body at the inner end of the orifice. The water, gas, or coal dust ejected from the orifice is isolated in the filter pipe 6 by the anti - spray plug 3, and the water, gas, or coal dust in the filter pipe 6 is discharged through the through - holes 61, the outlet of the gas - collecting pipe 2, and the exhaust pipeline.

[0027] In this embodiment, two water - mist nozzles 21 are radially arranged on the side wall of the gas - collecting pipe 2 near one end of the orifice pipe 1. The two water - mist nozzles 21 are circumferentially equidistantly arranged. The inner end of the water - mist nozzle 21 extends into the gas - collecting pipe 2, and the outer end of the water - mist nozzle 21 is connected to a water pipe. Water mist is sprayed into the gas - collecting pipe 2 through the water - mist nozzles 21, so that the volume and weight of the coal dust entering the gas - collecting pipe 2 through the orifice increase, thereby achieving the purpose of dust reduction.

[0028] In this embodiment, the diameters of the orifice pipe 1, the filter pipe 6, and the gas - collecting pipe 2 gradually increase. According to the Venturi effect and Bernoulli's principle, when the flow rate is constant, when passing through an enlarged cross - sectional area of the flow - through section, the fluid shows a phenomenon of decreasing flow velocity, and its flow velocity is inversely proportional to the area of the flow - through section. Then the flow velocities of the water, gas, or coal dust ejected from the orifice through the orifice pipe 1, the filter pipe 6, and the gas - collecting pipe 2 gradually decrease. Through the above structure, the flow velocities of the water, gas, or coal dust can be gradually reduced, avoiding the situation that the water, gas, or coal dust still has a high flow velocity when entering the gas - collecting pipe 2, thereby achieving the purpose of anti - spray.

[0029] In this embodiment, upper and lower outlets 22 and 23 are respectively formed at the upper and lower ends of the gas collecting pipe 2. The gas collecting pipe 2 can adopt an existing four-way pipe. Generally, the water, rock coal powder, particles, and slag discharged from the hole are discharged from the lower outlet under the influence of gravity, and the harmful gas with a density lower than that of air is discharged from the upper outlet. Preferably, the exhaust pipeline adopts a skeleton air duct 5, or a steel wire hose can also be used. The upper and lower outlets can be connected to the skeleton air duct 5 with the same diameter according to the spray hole intensity, and the export distance can be extended. The lower end of the skeleton air duct 5 is sleeved on the outer wall of the upper outlet 22 or the lower outlet 23, and the socket position of the upper outlet 22 or the lower outlet 23 and the skeleton air duct 5 is fixed by an air duct clamp 51, so as to tightly hoop the skeleton air duct 5 on the upper outlet 22 or the lower outlet 23, enabling sealed circulation between the skeleton air duct 5 and the gas collecting pipe 2; by using the air duct clamp 51 to tightly hoop the lower end of the skeleton air duct 5 on the upper outlet 22 or the lower outlet 23 of the gas collecting pipe 2, when the coal dust is discharged through the skeleton air duct 5, part of the coal dust can be deposited on the inner wall of the skeleton air duct 5, so that the separation of gas, liquid, and solid can be effectively carried out, and the harmful gas can be fully exported and shunted; preferably, the distal end of the skeleton air duct 5 can be selectively set to have a closed end with the same diameter as the connecting pipe of the exhaust device; this embodiment is applicable to pneumatic exhaust.

[0030] In this embodiment, the anti-blowout plug 3 includes an anti-blowout pipe 31, and a fourth flange 32 is fixedly sleeved on the inner end of the anti-blowout pipe 31. A plurality of brush hairs 33 are radially fixed on the inner wall of the anti-blowout pipe 31. The lengths of the brush hairs 33 are the same, and a circular through hole is formed in the middle of the front end of each brush hair 33. The diameter of the circular through hole is slightly smaller than the rod diameter of the drill rod 4, so that the front ends of the brush hairs 33 can abut against the drill rod 4. Most of the coal powder is isolated in the filter pipe 6 area by the brush hairs 33. At the same time, by controlling the forward or backward movement of the drill rod 4, the coal dust attached to the drill rod 4 can be cleaned by the brush hairs 33, so that the coal dust falls into the filter pipe 6 and is discharged through the through hole 61 and the outlet of the gas collecting pipe 2.

[0031] In this embodiment, an orifice pipe 1 is inserted at the orifice position of the present utility model, so that the water, gas, or coal dust discharged from the orifice position can only be discharged along the orifice pipe 1. The outer end of the orifice pipe 1 is communicated with the filter pipe 6 to extend the spraying space of the water, gas, or coal dust. At the same time, an anti-blowout plug 3 is arranged at the outer end of the filter pipe 6 to isolate the water and gas in the filter pipe 6, avoiding the overflow of water, gas, or coal dust. A gas collecting pipe 2 is sleeved outside the filter pipe 6, so that the water, gas, or coal dust in the filter pipe 6 enters the gas collecting pipe 2 through the through hole 61 and is discharged through the outlet of the gas collecting pipe 2 and the exhaust pipeline, thereby further increasing the buffer space for water, gas, or coal dust, greatly reducing the flow rate of the water, gas, or coal dust ejected from the orifice, thus avoiding personal injury caused by the direct spraying of water, gas, or coal dust, and at the same time avoiding the environmental pollution caused by the overflow of coal dust during the drilling process and preventing construction workers from suffering from pneumoconiosis.

[0032] Embodiment 2 of the present utility model discloses a mine orifice anti-blowout and dust reduction device. The difference from Embodiment 1 is that this embodiment also has the function of pumping and discharging gas. The upper outlet 22 of this embodiment is set as a reduced-diameter orifice 7, and the lower outlet 23 can be optionally set as a reduced-diameter orifice 7. The exhaust pipeline adopts a PE pipe 8, and the reduced-diameter orifice 7 is hermetically connected to the PE pipe 8. This embodiment is applicable to hydrodynamic slag and powder discharge. Under the influence of gravity, the slag and powder particles are naturally discharged from the lower outlet of the gas collecting pipe under the carrying of the returned water in the hole. The gas is pumped and discharged to a remote end through the negative pressure pipeline of the upper outlet passing through the reduced-diameter orifice and the PE pipe 8.

[0033] Embodiment 3 of the present utility model discloses a mine orifice anti-blowout and dust reduction device. The difference from Embodiment 1 is that in the blowout prevention pipe 31 of this embodiment, multiple circles of rubber rings 35 or packing rings 34 are coaxially fixed. The inner diameter of the rubber ring 35 or packing ring 34 is 0.1 mm - 0.5 mm larger than the outer diameter of the drill pipe 4, so that the inner circle of the rubber ring 35 or packing ring 34 abuts against the drill pipe 4. Through the rubber ring 35 or packing ring 34, the outer port of the filter pipe 6 is completely closed, and the water, gas or coal dust ejected from the orifice are all completely isolated and sealed in the area of the filter pipe 6.

[0034] The above are only the preferred and feasible embodiments of the present utility model, and do not limit the scope of rights of the present utility model. Any equivalent changes made by using the content of the specification and drawings of the present utility model are included in the scope of rights of the present utility model.

Claims

1. A mine orifice anti-spray and dust suppression device, characterized in that: It includes an orifice pipe, a filter pipe and a blowout prevention plug. The orifice pipe is inserted at the orifice position of the hole drilled by the drilling rig. The outer end of the orifice pipe is connected to the filter pipe, and the outer end of the filter pipe is connected to the blowout prevention plug. The drill rod of the drilling rig passes through the blowout prevention plug, the filter pipe and the orifice pipe to extend to the inner end of the orifice. A plurality of through holes are opened on the filter pipe, and a gas collecting pipe is sleeved on the outer side of the filter pipe. The gas collecting pipe is provided with at least one outlet, and the outlet is used to connect the extraction and drainage pipeline. The blowout prevention plug is used to isolate the water, gas or coal dust sprayed out of the orifice in the filter pipe, and the water, gas or coal dust in the filter pipe are discharged through the through holes, the outlet of the gas collecting pipe and the extraction and drainage pipeline.

2. The mine opening dust suppression device according to claim 1, characterized in that: At least one water mist nozzle is arranged on the air collecting pipe, and the water mist nozzle is used to spray water into the air collecting pipe to reduce dust.

3. The mine opening dust suppression device according to claim 1 is characterized in that: The diameters of the orifice pipe, filter pipe and gas collecting pipe gradually increase, and the flow rate of water, gas or coal dust sprayed from the orifice flowing through the orifice pipe, filter pipe and gas collecting pipe gradually decreases.

4. The mine opening dust suppression device according to claim 1, characterized in that: Both ends of the filter tube are respectively sleeved with flanges, the outer ring walls of the flanges at both ends are respectively fixed to the inner walls of the two ends of the gas collecting pipe, the outer end of the orifice pipe and the anti-blowout plug are both sleeved with flanges, the flange at the inner end of the filter tube is connected to the flange at the outer end of the orifice pipe by bolts, and the flange at the outer end of the filter tube is connected to the flange of the anti-blowout plug by bolts.

5. The mine opening dust suppression device according to claim 1, characterized in that: The upper end and the lower end of the gas collecting pipe are both provided with outlets, and the upper outlet and the lower outlet can be selectively set as reduced-diameter ports, and the reduced-diameter ports are used to connect with the extraction and exhaust pipelines.

6. The mine opening dust suppression device according to claim 1, characterized in that: The blowout prevention plug comprises a blowout prevention pipe, in which a plurality of bristles are radially arranged, and the front end of each bristle abuts against the drill rod.

7. The mine opening dust suppression device according to claim 1 is characterized in that: The blowout prevention plug comprises a blowout prevention pipe, in which a rubber ring or a packing ring is coaxially fixed, and the inner ring of the rubber ring or the packing ring abuts against the drill pipe.

8. The mine opening dust suppression device according to claim 5, characterized in that: The upper outlet and the lower outlet are sleeved with a skeleton air duct, and the sleeved positions of the upper outlet and the lower outlet and the skeleton air duct are fixed by air duct throat clamps, and the far end of the skeleton air duct can be optionally set to be closed.

9. The mine opening dust suppression device according to claim 1, characterized in that: The orifice tube is fixedly connected to the outer wall of the orifice through a curing agent.

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