Mine safety valve

Abstract

This application discloses a mine safety valve. At least one spiral guide line extending in the length direction and spiraling 1 to 10 degrees in the circumferential direction is provided on the inner wall of the oil inlet section near the oil outlet section. At least one straight guide line extending in the length direction is provided on the inner wall of the oil outlet section. The plug sealing section is columnar and forms a sliding fit with the oil outlet section. The plug guide section is separately and jointly disposed with the oil inlet section. The mine safety valve provided by this invention, by providing spiral guide lines on the valve body and spiral engaging guide lines on top, allows the axial impact energy of the movable plug to be offset by the frictional force between the spiral guide lines and the spiral engaging guide lines, thereby protecting the movable plug and the valve body. When the spiral guide line just engages with the spiral engaging guide line, the straight guide line and the straight engaging guide line are just separated, so that the straight guide line and the straight engaging guide line can restrict the rotation of the movable plug in some positions and release the rotation of the movable plug in other positions.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valves, and in particular to a safety valve for mining applications. Background Technology

[0002] A mine safety valve is a specially designed safety protection device for the mining industry. Its main function is to prevent explosions or destructive accidents caused by excessive pressure inside the mine. These safety valves are typically installed in the mine's ventilation system or on critical equipment to ensure the safe operation of the entire mine. When the pressure inside the mine accumulates to a preset safety threshold, the safety valve automatically activates, quickly opening to release the excessive pressure. This effectively prevents damage to the mine's internal structure or personnel casualties caused by excessive pressure, ensuring the stability of the mine's internal environment and the safety of miners.

[0003] A typical safety valve has a structure similar to a check valve, using a piston and a coil spring to achieve pressure relief. For example, when the oil pressure exceeds the elastic force provided by the coil spring, the piston is driven by the oil pressure to complete the pressure relief process; when the oil pressure is less than the elastic force provided by the coil spring, the piston is driven back to its original position by the coil spring to stop the pressure relief process. During the piston's operation, especially during the process of the coil spring returning the piston to its original position, it is susceptible to significant impacts. Soft seals may not meet the usage requirements in some scenarios and are easily damaged by impacts, and are also prone to aging. Summary of the Invention

[0004] The main objective of this invention is to provide a mine safety valve that addresses the problem of potential damage to the piston of the safety valve due to significant impact during operation.

[0005] To achieve the above objectives, the present invention provides a mine safety valve, comprising:

[0006] The valve body is cylindrical with a channel running through the middle. The channel includes an inlet section and an outlet section connected to each other. The inlet section is located at the front end, and the outlet section is located at the rear end with an inner diameter larger than that of the inlet section. The outlet section is provided with an outlet hole. At least one spiral guide line extending in the length direction and spiraling 1 to 10 degrees in the circumferential direction is provided on the inner wall of the section of the inlet section near the outlet section. At least one straight guide line extending in the length direction is provided on the inner wall of the outlet section.

[0007] The movable plug includes a plug guide section and a plug sealing section connected to each other. The plug sealing section is columnar and forms a sliding fit with the oil outlet section. The plug guide section is separately and jointly disposed with the oil inlet section. A helical fitting guide line is provided on the outer wall of the plug guide section corresponding to the helical guide line. A straight fitting guide line is provided on the outer wall of the plug sealing section corresponding to the straight guide line. When the helical guide line just engages with the helical fitting guide line, the straight guide line just separates from the straight fitting guide line.

[0008] The valve body is capped, connected, and sealed at its rear end.

[0009] A helical spring is compressed between the cap and the movable plug;

[0010] When the movable plug slides within the valve body, it closes and releases the oil outlet.

[0011] Furthermore, the end face of the plug sealing section is provided with a rod hole that is a blind hole at the central axis position, and the inner end of the cover is provided with a spring rod that extends into the rod hole. The helical spring is sleeved on the spring rod, and the spring rod and the rod hole are in clearance fit in the circumferential direction. When the movable plug slides, the spring rod and the rod hole are always in fit.

[0012] Furthermore, the end face of the plug sealing section is provided with a rod hole that is a blind hole at the central axis position, and the inner end of the cover is provided with a spring rod that extends into the rod hole. The helical spring is sleeved on the spring rod, and the spring rod and the rod hole are clearance fit in the circumferential direction. The spring rod only forms a fit with the rod hole when the movable plug separates from the oil inlet section and releases the oil outlet.

[0013] Furthermore, the guide section of the movable plug is frustoconical with its free end as the top, and the oil inlet section corresponding to the position of the guide section is also frustoconical. The peripheral wall of the guide section is at an angle of 85 to 89 degrees to the central axis, and the dimensions of the spiral guide line and the spiral mating guide line in their height direction are uniform.

[0014] Furthermore, the cap is threadedly connected to the valve body.

[0015] Furthermore, the two ends of the helical spring are respectively connected to the movable plug and the cap.

[0016] Furthermore, there are multiple oil outlet holes, which are evenly distributed around the valve body.

[0017] Furthermore, the number of spiral guide lines is multiple and they are evenly spaced around the circumference of the valve body.

[0018] Furthermore, the spiral guide line has a groove-shaped structure, and the spiral mating guide line has a protruding structure.

[0019] Furthermore, the oil outlet hole is located at one end of the oil outlet section near the oil inlet section along the length direction of the oil outlet section.

[0020] The mine safety valve provided by this invention, by setting a spiral guide line on the valve body and a spiral engaging guide line on the upper part, makes the axial impact energy of the movable plug canceled out by the frictional force between the spiral guide line and the spiral engaging guide line, thereby protecting the movable plug and the valve body; when the spiral guide line just engages with the spiral engaging guide line, the straight guide line and the straight engaging guide line just separate, so that the straight guide line and the straight engaging guide line can restrict the rotation of the movable plug in some positions and release the rotation of the movable plug in other positions. Attached Figure Description

[0021] Figure 1 This is a cross-sectional schematic diagram of the valve body in the mine safety valve of the first embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram (first perspective) of the movable plug in the mine safety valve of the first embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional schematic diagram (second perspective) of the movable plug in the mine safety valve of the first embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional schematic diagram (closed state) of the mine safety valve according to the first embodiment of the present invention;

[0025] Figure 5 This is a cross-sectional schematic diagram of the mine safety valve according to the first embodiment of the present invention (straight guide line and straight mating guide line are just engaged);

[0026] Figure 6 This is a cross-sectional schematic diagram of the mine safety valve according to the first embodiment of the present invention (the straight guide line and the straight mating guide line are already connected);

[0027] Figure 7 This is a cross-sectional schematic diagram of the mine safety valve according to the second embodiment of the present invention (straight guide line and straight mating guide line are just engaged).

[0028] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0030] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any of the units and all combinations of one or more associated listed items.

[0031] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0032] Reference Figures 1 to 7 In one embodiment of the present invention, a mine safety valve includes:

[0033] The valve body 100 is cylindrical with a channel running through the middle. The channel includes an inlet section 110 and an outlet section 120 connected to each other. The inlet section 110 is located at the front end, and the outlet section 120 is located at the rear end with an inner diameter larger than that of the inlet section 110. An outlet hole 121 is provided on the outlet section 120. At least one spiral guide line 111 extending in the length direction and spiraling 1 to 10 degrees in the circumferential direction is provided on the inner wall of the inlet section 110 near the outlet section 120. At least one straight guide line 122 extending in the length direction is provided on the inner wall of the outlet section 120.

[0034] The movable plug 200 includes a plug guide section 210 and a plug sealing section 220 connected to each other. The plug sealing section 220 is columnar and forms a sliding fit with the oil outlet section 120. The plug guide section 210 is separately and jointly disposed with the oil inlet section 110. A helical guide line 211 is provided on the outer wall of the plug guide section 210 corresponding to the helical guide line 111. A straight guide line 221 is provided on the outer wall of the plug sealing section 220 corresponding to the straight guide line 122. When the helical guide line 111 just engages with the helical guide line 211, the straight guide line 122 and the straight guide line 221 are just separated.

[0035] The cap 300 connects to and seals the rear end of the valve body 100;

[0036] A helical spring 400 is compressed between the cover 300 and the movable plug 200;

[0037] When the movable plug 200 slides within the valve body 100, it closes and releases the oil outlet 121.

[0038] In the existing technology, during the piston's operation, especially during the process of the helical spring resetting the piston, it is easily subjected to a large impact. Soft seals cannot meet the usage conditions in some scenarios and are easily damaged by impacts, and are also prone to aging problems.

[0039] The mine safety valve provided by the present invention includes a valve body 100, a movable plug 200, a cover 300, and a helical spring 400.

[0040] The valve body 100 is cylindrical with a channel running through its center. The channel includes an inlet section 110 and an outlet section 120 connected to each other. The inlet section 110 is located at the front end, and the outlet section 120 is located at the rear end with an inner diameter larger than that of the inlet section 110. The outlet section 120 is provided with an outlet hole 121. The inlet section 110 is the entry point for high-pressure oil, and the outlet hole 121 on the outlet section 120 is the pressure relief point for high-pressure oil. The number of outlet holes 121 is not limited to one, and multiple outlet holes 121 can be connected by a hook structure to improve the smoothness of operation. At least one spiral guide line 111 extending in the length direction and spiraling 1 to 10 degrees in the circumferential direction is provided on the inner wall of the section near the outlet section 120. At least one straight guide line 122 extending in the length direction is provided on the inner wall of the outlet section 120. The spiral guide line 111 has a spiral structure, but it can also be a groove or a protrusion on the inner wall of the oil inlet section 110. The straight guide line 122 has a straight structure, which can specifically be a groove or a protrusion. The spiral guide line 111 and the straight guide line 122 can be machined by integral molding or post-processing finishing.

[0041] The movable plug 200 includes a plug guide section 210 and a plug sealing section 220 connected to each other. The plug sealing section 220 is cylindrical and forms a sliding fit with the oil outlet section 120. When the movable plug 200 slides based on the plug sealing section 220, the plug guide section 210 of the movable plug 200 is engaged with the oil inlet section 110. A helical guide line 211 is provided on the outer wall of the plug guide section 210 corresponding to the helical guide line 111, and a straight guide line 221 is provided on the outer wall of the plug sealing section 220 corresponding to the straight guide line 122. When the helical guide line 111 just engages with the helical guide line 211, the straight guide line 122 and the straight guide line 221 are just separated. During one operation, when the plug guide section 210 of the movable plug 200 just engages with the oil inlet section 110 of the valve body 100, the helical guide line 111 also just engages with the helical guide line 211.

[0042] The spiral guide line 111 and the spiral mating guide line 211 have a small spiral angle in the circumferential direction, such as 1, 2, 3 or 8 degrees; then during the separation and engagement of the plug guide section 210 and the oil inlet section 110 of the movable plug 200, the engagement between the spiral guide line 111 and the spiral mating guide line 211 will not generate excessive resistance, thus affecting the operation of the safety valve.

[0043] The cap 300 connects to and seals the rear end of the valve body 100, providing a foundation for the operation of the oil outlet section 120. The connection between the cap 300 and the valve body 100 can be a threaded connection, etc.

[0044] A helical spring 400 is compressed between the cover 300 and the movable plug 200. The working pressure of the mine safety valve can be adjusted by selecting the stiffness coefficient of the helical spring 400. When the movable plug 200 slides within the valve body 100, it closes and releases the oil outlet 121. When the working pressure of the high-pressure oil cannot overcome the elastic force of the helical spring 400, the entire mine safety valve will not open; when the working pressure of the high-pressure oil overcomes the helical spring 400 and presses down the movable plug 200, the pressure relief process can be completed at the oil outlet 121.

[0045] During operation, after the safety valve is assembled, the front end of the valve body 100 is connected to the pipeline. When the pressure of the high-pressure oil does not exceed the working pressure, the movable plug 200, under the action of the helical spring 400, isolates the valve body 100, thereby sealing the oil outlet 121.

[0046] When the pressure of the high-pressure oil exceeds the working pressure, the movable plug 200 is pressed down and twisted until the oil outlet 121 is released by the movable plug 200. At this time, the helical spring 400 is compressed, and the meshing between the helical guide line 111 and the helical mating guide line 211 during the twisting process of the movable plug 200 introduces a certain frictional force to form a buffer, preventing the movable plug 200 from being damaged by excessive impact. When the movable plug 200 is pressed down and twisted, just as the helical guide line 111 is about to disengage from the helical mating guide line 211, the straight guide line 122 and the straight mating guide line 221 form a mating. At this time, the rotation of the movable plug 200 is restricted, but it can be pressed down by the high-pressure oil again.

[0047] When the pressure of the high-pressure oil drops again and falls below the working pressure, the movable plug 200 moves towards the oil inlet section 110 under the action of the helical spring 400. During the initial movement, the movable plug 200 does not rotate due to the action of the straight guide line 122 and the straight mating guide line 221. When the straight guide line 122 and the straight mating guide line 221 just separate, the helical guide line 111 just mates with the helical mating guide line 211. During the subsequent movement, the movable plug 200 rotates, and the meshing between the helical guide line 111 and the helical mating guide line 211 generates friction. The impact of the movable plug 200 is offset by the generation of the above friction.

[0048] In summary, by providing a helical guide line 111 on the valve body 100 and a helical engagement guide line 211 on it, the axial impact energy of the movable plug 200 is offset by the frictional force between the helical guide line 111 and the helical engagement guide line 211, thereby protecting the movable plug 200 and the valve body 100. When the helical guide line 111 just engages with the helical engagement guide line 211, the straight guide line 122 and the straight engagement guide line 221 are just separated. Thus, the straight guide line 122 and the straight engagement guide line 221 can restrict the rotation of the movable plug 200 in some positions and release the rotation of the movable plug 200 in other positions.

[0049] Reference Figures 1 to 6 In one embodiment, the end face of the plug sealing section 220 is provided with a rod hole 222, which is a blind hole, at the central axis position. The inner end of the cover 300 is provided with a spring rod 310 extending into the rod hole 222. The helical spring 400 is sleeved on the spring rod 310. The spring rod 310 and the rod hole 222 are in clearance fit in the circumferential direction. When the movable plug 200 slides, the spring rod 310 and the rod hole 222 are always in fit.

[0050] In this embodiment, during the operation of the movable plug 200, when the movable plug 200 is pressed down by pressurized oil and pushed up by the spring rod 310, the gap between the rod hole 222 and the spring rod 310 serves as the oil outlet position, creating a damping effect and protecting the structure of the movable plug 200. This configuration is particularly suitable for applications with lower operating pressures in mining safety valves.

[0051] Reference Figure 7 In one embodiment, the end face of the plug sealing section 220 is provided with a rod hole 222, which is a blind hole, at the central axis position. The inner end of the cover 300 is provided with a spring rod 310 extending into the rod hole 222. The helical spring 400 is sleeved on the spring rod 310. The spring rod 310 and the rod hole 222 are in clearance fit in the circumferential direction. The spring rod 310 only forms a fit with the rod hole 222 when the movable plug 200 separates from the oil inlet section 110 and releases the oil outlet 121.

[0052] In this embodiment, during the operation of the movable plug 200, when the movable plug 200 is pressed down by pressurized oil and the oil outlet 121 is not yet exposed, the damping effect is not yet formed between the rod hole 222 and the spring rod 310, resulting in a rapid response from the movable plug 200. Only when the movable plug 200 continues to slide does the spring rod 310 engage with the rod hole 222, creating a damping effect and preventing excessive impact on the movable plug 200. When the movable plug 200 is pushed up by the helical spring 400, before the helical guide line 111 engages with the helical engagement guide line 211, the damping effect between the spring rod 310 and the rod hole 222 provides buffering. After the spring rod 310 separates from the rod hole 222, the engagement between the helical guide line 111 and the helical engagement guide line 211 provides buffering. Through these settings, a rapid pressure relief response is achieved while providing buffering during other processes, thus protecting the movable plug 200. These settings are applicable when the working pressure of the mine safety valve is high.

[0053] In one embodiment, the plug guide section 210 on the movable plug 200 is frustoconical with the free end being the top, and the oil inlet section 110 is also frustoconical at the position corresponding to the plug guide section 210. The peripheral wall of the plug guide section 210 is at an angle of 85 to 89 degrees to the central axis, and the dimensions of the spiral guide line 111 and the spiral mating guide line 211 in their height direction are uniform.

[0054] In this embodiment, to improve the smoothness of the fit between the spiral guide line 111 and the spiral mating guide line 211, the guide section 210 of the movable plug 200 is designed as a frustum, and the oil inlet section 110 on the valve body 100 is also designed as a frustum corresponding to the guide section 210. Therefore, when the movable plug 200 engages with the oil inlet section 110 of the valve body 100, an initial clearance fit is formed in the circumferential direction. This makes it less likely for abnormalities to occur during the engagement of the movable plug 200 and the valve body 100, and also facilitates the fit between the spiral guide line 111 and the spiral mating guide line 211. Specifically, the taper of the two frustum structures cannot be too large; otherwise, the spiral guide line 111 will not fit with the spiral guide line 211 during the initial process of the movable plug 200 sliding into the oil section 110.

[0055] Reference Figures 1 to 6 In one embodiment, the cap 300 is threaded to the valve body 100.

[0056] In this embodiment, the degree of compression of the helical spring 400 can be adjusted by rotating the cover 300, thereby enabling the mine safety valve to adjust its working pressure. A fixing structure can also be provided for the cover 300 to reduce looseness between the cover 300 and the valve body 100.

[0057] In one embodiment, the two ends of the helical spring 400 are connected to the movable plug 200 and the cap 300, respectively.

[0058] In this embodiment, by fixing both ends of the helical spring 400, during the separation of the movable plug 200 from the oil inlet section 110, the helical spring 400 assists in the separation process with its torsional elastic force. This prevents the hydraulic oil from encountering excessive resistance during the downward pressure on the movable plug 200, thus ensuring the safety valve function. This feature is even more effective when the helical guide line 111 has a large circumferential spiral angle.

[0059] In one embodiment, there are multiple oil outlet holes 121, which are evenly distributed around the valve body 100.

[0060] In this embodiment, the number of oil outlet holes 121 is limited to multiple, which makes the flow of hydraulic oil from the valve body 100 smoother and facilitates the pressure relief process. For example, there are four oil outlet holes 121, spaced 90 degrees apart.

[0061] In one embodiment, the number of spiral guide lines 111 is multiple and they are evenly spaced around the valve body 100.

[0062] In this embodiment, the number of spiral guide lines 111 is increased, and the number of spiral mating guide lines 211 is also increased accordingly. By increasing the number of spiral guide lines 111, the buffering effect on the movable plug 200 is stronger and more uniform. In a specific implementation, the number of spiral guide lines 111 is four, and they are evenly distributed around the perimeter.

[0063] In one embodiment, the spiral guide line 111 has a groove-shaped structure, and the spiral mating guide line 211 has a protruding structure.

[0064] In this embodiment, the spiral guide line 111 on the valve body 100 is set as a groove structure, which can be easily produced by machine tool cutting; the spiral mating guide line 211 on the movable plug 200 is set as a protruding structure, which can be easily processed by casting or machine tool.

[0065] In one embodiment, the oil outlet 121 is located at one end of the oil outlet section 120 near the oil inlet section 110 along its length.

[0066] In this embodiment, the position of the oil outlet 121 is marginalized, thereby reducing the length of the movable plug 200 as much as possible.

[0067] In summary, the mine safety valve provided by the present invention, by setting a spiral guide line 111 on the valve body 100 and a spiral engaging guide line 211 on it, allows the axial impact energy of the movable plug 200 to be offset by the frictional force between the spiral guide line 111 and the spiral engaging guide line 211, thereby protecting the movable plug 200 and the valve body 100; when the spiral guide line 111 just engages with the spiral engaging guide line 211, the straight guide line 122 and the straight engaging guide line 221 just separate, so that the straight guide line 122 and the straight engaging guide line 221 can restrict the rotation of the movable plug 200 in some positions and release the rotation of the movable plug 200 in other positions.

[0068] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A mine safety valve, characterized in that, include: The valve body (100) is cylindrical with a channel running through the middle. The channel includes an inlet section (110) and an outlet section (120) connected to each other. The inlet section (110) is located at the front end, and the outlet section (120) is located at the rear end with an inner diameter larger than that of the inlet section (110). An outlet hole (121) is provided on the outlet section (120). At least one spiral guide line (111) extending in the length direction and spiraling 1 to 10 degrees in the circumferential direction is provided on the inner wall of the inlet section (110) near the outlet section (120). At least one straight guide line (122) extending in the length direction is provided on the inner wall of the outlet section (120). The movable plug (200) includes a plug guide section (210) and a plug sealing section (220) connected to each other. The plug sealing section (220) is columnar and forms a sliding fit with the oil outlet section (120). The plug guide section (210) is separated from the oil inlet section (110). A spiral fitting guide line (211) is provided on the outer wall of the plug guide section (210) corresponding to the spiral guide line (111). A straight fitting guide line (221) is provided on the outer wall of the plug sealing section (220) corresponding to the straight guide line (122). When the spiral guide line (111) just engages with the spiral fitting guide line (211), the straight guide line (122) and the straight fitting guide line (221) are just separated. A cap (300) is attached to and closes the rear end of the valve body (100); A helical spring (400) is compressed between the cover (300) and the movable plug (200); When the movable plug (200) slides within the valve body (100), it closes and releases the oil outlet (121).

2. The mine safety valve according to claim 1, characterized in that, The end face of the plug sealing section (220) is provided with a rod hole (222) that is a blind hole at the central axis position. The inner end of the cover (300) is provided with a spring rod (310) that extends into the rod hole (222). The helical spring (400) is sleeved on the spring rod (310). The spring rod (310) and the rod hole (222) are in clearance fit in the circumferential direction. When the movable plug (200) slides, the spring rod (310) and the rod hole (222) are always in fit.

3. The mine safety valve according to claim 1, characterized in that, The end face of the plug sealing section (220) is provided with a rod hole (222) that is a blind hole at the central axis position. The inner end of the cover (300) is provided with a spring rod (310) that extends into the rod hole (222). The helical spring (400) is sleeved on the spring rod (310). The spring rod (310) and the rod hole (222) are in clearance fit in the circumferential direction. The spring rod (310) only forms a fit with the rod hole (222) when the movable plug (200) separates from the oil inlet section (110) and releases the oil outlet (121).

4. The mine safety valve according to claim 1, characterized in that, The plug guide section (210) on the movable plug (200) is frustoconical with the free end being the top. The oil inlet section (110) is also frustoconical at the position corresponding to the plug guide section (210). The peripheral wall of the plug guide section (210) is at an angle of 85 to 89 degrees to the central axis. The dimensions of the spiral guide line (111) and the spiral mating guide line (211) are uniform in their height direction.

5. The mine safety valve according to any one of claims 1 to 4, characterized in that, The cap (300) is threaded to the valve body (100).

6. The mine safety valve according to any one of claims 1 to 4, characterized in that, The two ends of the helical spring (400) are respectively connected to the movable plug (200) and the cap (300).

7. The mine safety valve according to any one of claims 1 to 4, characterized in that, The number of oil outlet holes (121) is multiple, and they are evenly distributed around the valve body (100).

8. The mine safety valve according to any one of claims 1 to 4, characterized in that, The number of spiral guide lines (111) is multiple and they are evenly spaced around the valve body (100).

9. The mine safety valve according to any one of claims 1 to 4, characterized in that, The spiral guide line (111) has a groove structure, and the spiral mating guide line (211) has a protruding structure.

10. The mine safety valve according to claim 1, characterized in that, The oil outlet (121) is located at one end of the oil outlet section (120) near the oil inlet section (110) along its length.

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