Coal mine underground orifice blowout prevention dustproof equipment

Abstract

The present application belongs to the field of coal mine, and relates to a coal mine underground orifice blowout prevention dust isolation device, which comprises, in sequence, a stamping dust isolation assembly, a gasket eccentric isolation assembly, a columnar brush array isolation assembly and a slag collecting main body, the slag collecting main body is connected with an orifice sealing pipe in a hole, and a drill rod is arranged through the stamping dust isolation assembly, the gasket eccentric isolation assembly, the columnar brush array isolation assembly and the slag collecting main body. The present application realizes the blocking of dust in the hole through the brush dust blocking of the columnar brush array isolation assembly, the eccentric dust isolation of the eccentric isolation assembly and the stamping dust isolation of the stamping dust isolation assembly, realizes the linkage control of the mechanism on the sealing assembly, and the greater the gas pressure sprayed out of the hole, the better the sealing effect of the sealing assembly, so that the safety hidden danger problem of gas spray hole in the drilling process can be effectively solved.

Description

Technical Field

[0001] This invention belongs to the field of coal mining and relates to blowout prevention and dust control equipment for underground coal mine orifices. Background Technology

[0002] During underground drilling in coal mines, it is necessary to isolate the gas and dust inside the borehole. To prevent safety accidents caused by the ejection of gas or high-pressure water, a four-way blowout preventer (BOP) is generally installed at the borehole opening. The four-way BOP is a commonly used safety device whose main function is to isolate the gas and dust inside the borehole, preventing the ejection of gas or high-pressure water. When gas or high-pressure water suddenly ejects from the borehole, a buffer is formed within the BOP's cavity, and the gas and water are diverted to the discharge pipeline through gas and liquid guide pipes. However, due to structural limitations, a certain gap always exists between the four-way device and the drill pipe. When the pressure of the gas or water ejected from the borehole exceeds a certain limit, it will gush out from the gap, causing excessive gas levels at the drilling site and creating a significant safety hazard.

[0003] To address this challenge, some existing blowout preventers have undergone structural optimization, incorporating internal sealing components that can mitigate gas outbursts to some extent. However, as the drill string rotates during drilling, the effectiveness of these sealing components decreases significantly. Therefore, current wellhead blowout preventers still cannot effectively prevent the ejection of high-pressure gas and water during drilling, posing a persistent safety hazard. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a blowout prevention and dust isolation device for underground coal mine orifices. Based on the installation of sealing components, the device uses methods such as stamping dust isolation, eccentric dust isolation, and brush dust blocking to block dust inside the orifice, thereby completely solving the blowout prevention problem at the orifice.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a blowout prevention and dust control device for underground coal mine orifices, comprising a stamped dust control component, a gasket eccentric isolation component, a columnar brush array isolation component, and a slag collection body connected in sequence. The slag collection body is connected to the borehole sealing pipe, and the drill rod is inserted through the stamped dust control component, the gasket eccentric isolation component, the columnar brush array isolation component, and the slag collection body. The dust inside the borehole is blocked by the brushes of the columnar brush array isolation component, the eccentric dust control of the eccentric isolation component, and the stamped dust control by the stamping of the stamped dust control component.

[0006] Optionally, the stamped dustproof assembly includes a guide sleeve, a first water connector, a stamped dustproof housing, a first flange, an air connector, and an air-water mixing annular groove;

[0007] An air-water mixing annular groove is fitted onto the outer surface of the stamped dustproof housing to form an annular cavity. The air connector and the first water connector are welded to the corresponding holes in the annular cavity. An array of holes is also provided on the stamped dustproof housing at the position of the annular cavity. High-pressure water and air enter the annular cavity and mix. Water mist is sprayed into the stamped dustproof housing through the array of holes to block the dust from flowing out of the cavity.

[0008] The direction of the array apertures is set at an angle to the axis of the stamped dustproof housing.

[0009] Optionally, the stamped dust isolation assembly is connected to the gasket eccentric isolation assembly via the first flange.

[0010] Optionally, the eccentric isolation assembly includes a second flange, a hollow shaft, a housing end cap, a dustproof gasket, a rear gasket, a rear lever, an eccentric housing, a front lever, and a front gasket and lever connecting rod.

[0011] The dustproof pad is a rubber pad with holes of different sizes. The larger hole is for the drill rod to pass through, and the smaller hole is for the ear hole, which is used to suspend it on the hollow shaft. There are 4 dustproof pads in total, strung together with the larger hole as the center. The ear hole parts of adjacent dustproof pads are 90 degrees apart.

[0012] Optionally, the eccentric shell is fixed in the shell end cap by welding to form a cavity. The shell end cap has a central hole, an intermediate array of holes, and an outer array of holes from the center outwards. The central hole is a drill rod through hole, the intermediate array of holes is a hollow shaft arrangement hole, and the outer array of holes is a threaded hole for bolt connection with the slag collection body.

[0013] Four dust-proof pads are stacked on top of each other and connected together through the central hole, placed in the concave cavity, and pressed down with a cap.

[0014] Optionally, the parts strung on the hollow shaft, from right to left, are a rear washer, a rear shifter, a housing end cap, a pressure cap, a front shifter, and a front washer, and are locked by a nut at the end of the hollow shaft. The centers of the connected parts are aligned, and the front and rear shifters are connected by a shifter connecting rod.

[0015] Optionally, the front and rear paddles have contours. By pulling the front and rear paddles through the paddle connecting rod, the hollow shaft rolls along the front and rear paddles, thereby causing the four dust-proof pads to be eccentrically pressed against the drill rod.

[0016] Optionally, the columnar brush array isolation assembly is installed in the central body at one end away from the end of the in-hole sealing pipe, including columnar brushes, a second water connector, a columnar brush seat, a bristle pressing cover, a spring, and a nozzle;

[0017] One end of the columnar brush holder has a conical hole, a middle array hole, an outer edge array hole and a positioning hole in sequence from the center outwards. The other end has a conical surface structure. The middle array hole is equipped with columnar brushes that match its number. The columnar brushes are set in close contact with the conical surface and are covered by a conical bristle pressing cover.

[0018] Optionally, a spring is provided between the bristle pressing cap and the cylindrical brush seat for resetting the bristle pressing cap. After the bristle pressing cap is compressed under the action of air pressure in the hole, it resets after the pressure is released.

[0019] A second water connector and a nozzle are also provided in the cavity between the bristle cap and the columnar brush to spray water into the cavity.

[0020] Optionally, the slag collection body consists of a third flange and a slag collection body, used to connect the slag collection body to the sealing pipe inside the hole.

[0021] The beneficial effects of the present invention are as follows: The coal mine underground orifice blowout prevention and dust isolation device of the present invention realizes the linkage control of the mechanism on the sealing component through components such as stamping dust isolation, eccentric dust isolation, and brush dust blocking. Moreover, the greater the pressure of the gas ejected from the hole, the better the sealing effect of the sealing component, which can effectively solve the problem of safety hazards of gas blowout during drilling.

[0022] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the overall internal structure of the coal mine underground orifice blowout prevention and dust control device of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall external structure of the coal mine underground orifice blowout prevention and dust control device of the present invention;

[0026] Figure 3 for Figure 1 A cross-sectional view of JJ;

[0027] Figure 4 for Figure 1 A cross-sectional view of GG;

[0028] Figure 5 This is a schematic diagram of the shell end cover of the coal mine underground orifice blowout prevention and dust isolation device of the present invention;

[0029] Figure 6 This is a schematic diagram of the columnar brush seat of the coal mine underground orifice blowout prevention and dust control device of the present invention;

[0030] Figure 7The diagram shows the front and rear levers of the coal mine underground orifice blowout prevention and dust control device of the present invention; wherein Figure (a) is a schematic diagram of the rear lever; and Figure (b) is a schematic diagram of the front lever.

[0031] Figure 8 This is a schematic diagram of the stamped dust-proof housing of the coal mine underground orifice blowout prevention and dust-proof device of the present invention;

[0032] Figure 9 This is a schematic diagram of the columnar brush array isolation component of the coal mine underground orifice blowout prevention and dust control device of the present invention.

[0033] Reference numerals: 1. Guide sleeve; 2. First water connector; 3. Stamped dustproof housing; 4. First flange; 5. Second flange; 6. Dustproof gasket; 7. Columnar brush; 8. Second water connector; 9. Columnar brush seat; 10. Slag collection body; 11. Third flange; 12. Pressing cover; 13. Spring; 14. Nozzle; 15. Rear gasket; 16. Rear lever; 17. Housing end cover; 18. Front lever; 19. Pressure cover; 20. Front gasket; 21. Nut; 22. Air connector; 23. Air-water mixing ring groove; 24. Lever connecting rod; 25. Hollow shaft; 26. Eccentric housing; 27. Fixing hole; 28. Retention hole. Detailed Implementation

[0034] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0036] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0037] Please see Figures 1-9 This is a blowout prevention and dust control device for underground coal mine orifices, comprising a stamped dust control component, a gasket eccentric isolation component, a columnar brush array isolation component, and a slag collection body connected in sequence. The slag collection body is connected to the borehole sealing pipe, and the drill rod is installed through the stamped dust control component, the gasket eccentric isolation component, the columnar brush array isolation component, and the slag collection body. The dust inside the borehole is blocked by the brushes of the columnar brush array isolation component, the eccentric dust control component, and the stamped dust control component.

[0038] The stamped dustproof assembly includes a guide sleeve 1, a first water connector 2, a stamped dustproof housing 3, a first flange 4, an air connector 22, and an air-water mixing annular groove 23. The air-water mixing annular groove 23 is fitted onto the outer surface of the stamped dustproof housing 3 to form an annular cavity. The air connector 22 and the first water connector 2 are welded to the corresponding holes in the annular cavity. The stamped dustproof housing 3 is also provided with an array of holes at the position of the annular cavity. High-pressure water and air enter the annular cavity and mix, and are sprayed into the stamped dustproof housing 3 through the array of holes to form a water mist isolation ring, which isolates the dust in the holes and the washing dust, and blocks the dust from flowing out of the cavity.

[0039] In this embodiment, the direction of the array apertures is set at a certain angle to the axis of the stamped dustproof housing 3, and the water outlet of the apertures is directed toward the side of the eccentric isolation component of the gasket. At this time, a negative pressure is formed on the side away from the eccentric isolation component of the gasket, which can better block dust.

[0040] In this embodiment, the stamped dustproof assembly is fixed to the second flange 5 of the gasket eccentric isolation assembly via the first flange 4.

[0041] The eccentric isolation assembly includes a second flange 5, a hollow shaft 25, a housing end cap 17, a dustproof gasket 6, a rear gasket 15, a rear lever 16, an eccentric housing 26, a front lever 18, a front gasket 20, and a lever connecting rod 24. The dustproof gasket 6 is a rubber pad with holes of different sizes. The larger hole is a drill rod through hole, and the smaller hole is an ear hole for suspension on the hollow shaft 25. There are 4 dustproof gaskets 6 in total, strung together with the larger hole as the center. The ear hole portions of adjacent dustproof gaskets 6 are 90 degrees apart.

[0042] In this embodiment, after the front and rear paddles are rotated at a small angle, the fixing hole 28 on the rear paddle and the fixing hole 27 on the columnar brush seat 9 are aligned and then fixed with screws.

[0043] The eccentric housing 26 is fixed to the housing end cap 17 by welding, forming a cavity. The housing end cap 17 has a central hole, an intermediate array hole, and an outer edge array hole from the center outwards. The central hole is the drill rod through hole, the intermediate array hole is the hole for arranging the hollow shaft 25, and the outer edge array hole is the threaded hole for bolt connection with the slag collection body. Four dust-proof pads 6 are stacked on top of each other and connected together through the central hole, placed in the cavity, and pressed down by the pressure cap 19. The parts strung on the hollow shaft 25 from right to left are the rear pad 15, the rear lever 16, the housing end cap 17, the pressure cap 19, the front lever 18, and the front pad 20, and are locked by the nut 21 at the shaft end of the hollow shaft 25. The centers of the connected parts are aligned. The front lever 18 and the rear lever 16 are connected by the lever connecting rod 24. The front and rear paddles have contours. By pulling the paddle connecting rod 24 to rotate circumferentially, the hollow shaft 25 rolls along the contours of the front and rear paddles and expands radially under the guidance of the waist-shaped holes in the housing end cap 17 and the pressure cap 19. At this time, the dustproof pad 6 connected to the hollow shaft 25 moves radially, causing the center hole of the dustproof pad 6 to be eccentric. If a drill rod is placed in the center hole at this time, one side of the dustproof pad 6 will firmly stick to the surface of the drill rod. The four pads sticking to the drill rod in different directions will cause the drill rod to be tightly sealed circumferentially.

[0044] The columnar brush array isolation assembly is installed inside the main body at the end away from the sealing pipe inside the hole. It includes columnar brushes 7, a second water connector 8, a columnar brush seat 9, a bristle pressing cover 12, a spring 13, and a nozzle 14. One end of the columnar brush seat 9 has a conical hole, a middle array hole, an outer edge array hole, and a positioning hole arranged sequentially from the center outwards. The other end has a conical surface structure. The middle array hole is equipped with columnar brushes 7 in matching numbers. The columnar brushes 7 are fitted against the conical surface and are covered by a conical bristle pressing cover 12. A spring 13 is provided between the bristle pressing cover 12 and the columnar brush seat 9 for the reset of the bristle pressing cover 12. After the bristle pressing cover 12 is compressed under the action of air pressure inside the hole, it resets after the pressure is released. A second water connector 8 and a nozzle 14 are also provided in the cavity between the bristle pressing cover 12 and the columnar brushes 7 to spray water into the cavity.

[0045] In this embodiment, the length of the columnar brush 7 is greater than the length of the conical surface, causing the ends of the columnar brush 7 to converge towards the center of the conical structure, thereby forming an annular extruded bristle partition. When the drill rod is placed in the middle of the columnar brush array isolation assembly, the annular extruded bristle partition can form the first barrier against dust.

[0046] The slag collection body consists of a third flange 11 and a slag collection body 10, which is used to connect the slag collection body 10 to the sealing pipe inside the hole.

[0047] This invention connects the blowout prevention and dust control equipment at the underground orifice of a coal mine with the sealing pipe inside the orifice. Through the first dust blocking by brush, the second dust blocking by eccentricity, and the third dust blocking by stamping, the mechanism realizes the linkage control of the sealing components.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A blowout dust prevention device for a borehole in a coal mine, characterized in that: It includes a stamped dust-proof assembly, a gasket eccentric isolation assembly, a columnar brush array isolation assembly and a slag collection body connected in sequence. The slag collection body is connected to the hole sealing pipe, and the drill rod is installed through the stamped dust-proof assembly, the gasket eccentric isolation assembly, the columnar brush array isolation assembly and the slag collection body. Dust inside the hole is blocked by a columnar brush array isolation component, an eccentric isolation component, and a stamping dust isolation component. The eccentric isolation gasket assembly includes a second flange, a hollow shaft, a housing end cap, a dustproof gasket, a rear gasket, a rear lever, an eccentric housing, a front lever, and a connecting rod between the front gasket and the lever. The dustproof pad is a rubber pad with holes of different sizes. The larger hole is for the drill rod to pass through, and the smaller hole is for the ear hole, which is used to suspend it on the hollow shaft. There are 4 dustproof pads in total, strung together with the larger hole as the center. The ear hole parts of the adjacent dustproof pads are 90 degrees apart. The parts strung on the hollow shaft, from right to left, are: rear gasket, rear lever, housing end cap, pressure cap, front lever, and front gasket. They are locked together by a nut at the end of the hollow shaft, and the centers of the connected parts are aligned. The front lever and the rear lever are connected by a lever connecting rod. The front lever and the rear lever have contours. By pulling the front lever and the rear lever through the lever connecting rod, the hollow shaft is rotated along the front lever and the rear lever, so that the four dust-proof gaskets are eccentrically pressed against the drill rod.

2. The coal mine borehole blowout preventer dust separator apparatus according to claim 1, characterised in that: The stamped dustproof assembly includes a guide sleeve, a first water connector, a stamped dustproof housing, a first flange, an air connector, and an air-water mixing annular groove; An air-water mixing annular groove is fitted onto the outer surface of the stamped dustproof housing to form an annular cavity. The air connector and the first water connector are welded to the corresponding holes in the annular cavity. An array of holes is also provided on the stamped dustproof housing at the position of the annular cavity. High-pressure water and air enter the annular cavity and mix. Water mist is sprayed into the stamped dustproof housing through the array of holes to block the dust from flowing out of the cavity. The direction of the array apertures is set at an angle to the axis of the stamped dustproof housing.

3. The coal mine borehole blowout preventer dust separator apparatus according to claim 2, characterised in that: The stamped dustproof assembly is connected to the gasket eccentric isolation assembly via the first flange.

4. The coal mine borehole blowout preventer dust separator apparatus of claim 1, wherein: The eccentric shell is fixed to the shell end cap by welding to form a cavity. The shell end cap has a central hole, an intermediate array of holes, and an outer array of holes from the center outwards. The central hole is the drill rod through hole, the intermediate array of holes is the hollow shaft arrangement hole, and the outer array of holes is the threaded hole for bolt connection with the slag collection body. Four dust-proof pads are stacked on top of each other and connected together through the central hole, placed in the concave cavity, and pressed down with a cap.

5. The coal mine borehole blowout preventer dust separator apparatus as defined in claim 1, wherein: The columnar brush array isolation assembly is installed inside the central body at one end away from the sealing pipe inside the hole, and includes columnar brushes, a second water connector, a columnar brush seat, a bristle pressing cover, a spring, and a nozzle; One end of the columnar brush holder has a conical hole, a middle array hole, an outer edge array hole and a positioning hole in sequence from the center outwards. The other end has a conical surface structure. The middle array hole is equipped with columnar brushes that match its number. The columnar brushes are set in close contact with the conical surface and are covered by a conical bristle pressing cover.

6. The coal mine borehole blowout preventer dust separator apparatus as claimed in claim 5, wherein: A spring is provided between the bristle pressing cap and the cylindrical brush seat to reset the bristle pressing cap. After the bristle pressing cap is compressed by the air pressure in the hole, it resets after the pressure is released. A second water connector and a nozzle are also provided in the cavity between the bristle cap and the columnar brush to spray water into the cavity.

7. The coal mine borehole blowout preventer dust containment apparatus of claim 1, wherein: The slag collection body consists of a third flange and a slag collection body, which is used to connect the slag collection body to the sealing pipe inside the hole.

Images