Air pressure sealing mechanism for coal seam drill rod
By designing casing and sealing components on the coal seam drill pipe and using high-pressure gas to maintain high pressure inside the casing, the sealing problem of the coal seam drill pipe was solved, and safe and stable sealing was achieved during the drilling process.
Patent Information
- Application Number
- CN202520256721.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-18
AI Technical Summary
Existing technologies are insufficient to effectively seal coal seam drill pipes, leading to gas leaks and posing safety hazards.
A gas pressure sealing mechanism for coal seam drill pipes, comprising a casing, a sealing tube, a sealing assembly, and a pressurizing device, is designed. By injecting high-pressure gas into the casing, the gas pressure inside the casing is made higher than the gas pressure at the drill pipe head. Multiple sealing rings and rubber rings are used to achieve flexible connection, control the gas discharge rate, and prevent leakage.
It achieves efficient sealing of the drill pipe, reduces gas leakage, improves system stability and safety, and avoids sudden gas pressure fluctuations.
Smart Images
Figure CN223724568U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of sealing device, specifically, relate to a coal seam drill rod air pressure sealing mechanism. BACKGROUND
[0002] Coal seam drilling refers to drilling at relevant positions in the coal seam, passing through the drilling to pass through the gas extraction channel, and then extracting the gas through the drilling, and then in the drilling process or the extraction process, the hole may be ejected, that is, the sudden high-pressure gas is ejected from the drilling, and a large amount of coal powder is ejected, which not only pollutes the roadway, but also affects the gas extraction.
[0003] Therefore, during the drilling process, the surrounding of the drilling and the drill rod need to be sealed to avoid gas leakage, and the drill rod has a spiral groove structure on the surface, and the drill rod itself will vibrate at a certain frequency during the drilling process. Even if a sealing bearing is arranged on the drill rod, it is difficult to realize the real sealing of the drill rod, so that the gas leaks from the drill rod, causing certain danger. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a coal seam drill rod air pressure sealing mechanism which can efficiently seal the drill rod and avoid gas leakage from the drill rod.
[0005] The utility model discloses a coal seam drill rod air pressure sealing mechanism, which comprises a sleeve pipe sleeved on the outer wall of a drill rod, a pair of sealing pipes arranged at the two ends of the sleeve pipe, a sealing assembly arranged in the sleeve pipe away from the head of the drill rod, and a pressurizing device communicated with the end of the sleeve pipe close to the head of the drill rod.
[0006] Further, the sealing assembly is provided with a plurality of sealing assemblies distributed along the length direction of the sleeve pipe.
[0007] Further, the sealing assembly comprises a first sealing ring attached to the inner wall of the sleeve pipe, a second sealing ring sleeved on the outer wall of the drill rod, and a rubber ring used for connecting the first sealing ring and the second sealing ring.
[0008] Further, a sealing ring is arranged between the first sealing ring and the inner wall of the sleeve pipe.
[0009] Further, the length of the first sealing ring is greater than the length of the second sealing ring.
[0010] A pair of the rubber rings is arranged between the first sealing ring and the second sealing ring, and the interval of the pair of the rubber rings near the inner side of the second sealing ring is smaller than the interval of the pair of the rubber rings near the outer side of the second sealing ring.
[0011] Further, the sleeve is internally provided with a limiting ring between the sealing assembly and the connecting head.
[0012] Further, the sleeve is internally provided with a limiting ring between the sealing assembly and the connecting head.
[0013] The technical scheme of the utility model has at least the following advantages and beneficial effects: the coal seam drill rod air pressure sealing mechanism of the utility model can continuously inject high-pressure gas into the sleeve through the air compressor during use, so that the air pressure in the sleeve is always higher than the air pressure at the drill rod head, which can avoid the gas at the drill rod head from entering the sleeve during drilling, thereby sealing the drill hole and avoiding gas leakage. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 The utility model provides a coal seam drill rod air pressure sealing mechanism structure schematic view;
[0015] Figure 2 The utility model provides a coal seam drill rod air pressure sealing mechanism structure schematic view;
[0016] Figure 3 The utility model provides a coal seam drill rod air pressure sealing mechanism structure schematic view;
[0017] Figure: 10-drill rod, 11-drill rod head, 21-sleeve, 22-sealing pipe, 23-connecting head, 24-cover plate, 25-bolt, 26-limiting ring, 30-sealing assembly, 31-first sealing ring, 32-second sealing ring, 33-rubber ring. DETAILED DESCRIPTION
[0018] EMBODIMENT
[0019] The following will be further explained in combination with specific embodiments, such as the accompanying drawings Figure 1 -Appendix Figure 3As shown, the coal seam drill rod air pressure sealing mechanism of the embodiment comprises a sleeve 21 sleeved on the outer wall of the drill rod 10, a pair of sealing pipes 22 respectively arranged at both ends of the sleeve 21, a sealing assembly 30 arranged in the sleeve 21 away from the head end of the drill rod 10, and a pressurizing device communicated with the end of the sleeve 21 close to the head end of the drill rod 10; the pressurizing device comprises a connecting head 23 arranged on the side wall of the sleeve 21, and the connecting head 23 is used to connect the air compressor. Specifically, in use, the air compressor is used to continuously inject high-pressure gas into the sleeve 21, so that the air pressure in the sleeve 21 is always higher than that at the head end of the drill rod 10, thereby avoiding the gas at the head end of the drill rod 10 from entering the sleeve 21 during drilling, and further sealing the drilling hole to avoid gas leakage. In the sleeve 21, since the sealing assembly 30 is arranged at the end of the sleeve 21 away from the head end of the drill rod 10, the rate at which the gas in the sleeve 21 is discharged to the end of the sealing assembly 30 can be better controlled, the rate of gas overflow is smaller, the fluctuation range of the air pressure is smaller, and the sleeve 21 is less likely to suddenly have a larger or smaller air pressure, and the entire system is more secure and stable.
[0020] The sealing assembly 30 in the embodiment is provided in multiple numbers, and the multiple sealing assemblies 30 are distributed along the length direction of the sleeve 21. Specifically, only one sealing assembly 30 is drawn in the drawing as an example, and the multiple sealing assemblies 30 can improve the sealing effect and improve the fault tolerance of the device.
[0021] The sealing assembly 30 in the embodiment comprises a first sealing ring 31 attached to the inner wall of the sleeve 21, a second sealing ring 32 sleeved on the outer wall of the drill rod 10, and a rubber ring 33 used to connect the first sealing ring 31 and the second sealing ring 32. Specifically, during drilling, the drill rod 10 not only rotates, but also moves axially and slightly jumps, so that the first sealing ring 31 and the second sealing ring 32 are connected by the rubber ring 33, so that during the jumping of the drill rod 10, the second sealing ring 32 can move radially by stretching the rubber ring 33, thereby avoiding strong force between the drill rod 10 and the second sealing ring 32, and the first sealing ring 31 also does not generate strong force with the sleeve 21, so that the durability of the entire device is better,
[0022] The first sealing ring 31 in the embodiment is provided with a sealing ring between the first sealing ring 31 and the inner wall of the sleeve 21. Specifically, the sealing ring can seal the first sealing ring 31 and the inner wall of the sleeve 21.
[0023] The length of the first sealing ring 31 in the embodiment is greater than the length of the second sealing ring 32; a pair of rubber rings 33 are arranged between the first sealing ring 31 and the second sealing ring 32, and the spacing of the pair of rubber rings 33 close to the inner side of the second sealing ring 32 is smaller than the spacing of the outer side. Specifically, the pair of rubber rings 33 can make the connection strength between the first sealing ring 31 and the second sealing ring 32.
[0024] The inner wall of the sleeve 21 in the embodiment is fixedly provided with a limiting ring 26, which is arranged between the sealing assembly 30 and the connecting head 23.
[0025] The end of the sleeve 21 close to the sealing assembly 30 in the embodiment is provided with a cover plate 24, which is detachably connected with the sleeve 21 and abuts against the first sealing ring 31.
[0026] In conclusion, the coal seam drill rod air pressure sealing mechanism in the embodiment can continuously inject high-pressure gas into the sleeve 21 through the air compressor during use, so that the air pressure in the sleeve 21 is always higher than that at the head of the drill rod 10, which can avoid the gas at the head of the drill rod 10 from entering the sleeve 21 during drilling, thereby sealing the drilling and avoiding gas leakage. In the sleeve 21, since the sealing assembly 30 is arranged at the end of the sleeve 21 away from the head of the drill rod 10, the rate of the gas in the sleeve 21 discharged to the end of the sealing assembly 30 can be better controlled, the rate of the gas overflow is smaller, the fluctuation range of the air pressure is smaller, and the sleeve 21 is less likely to suddenly have a larger or smaller air pressure, so that the whole system is safer and more stable.
[0027] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A gas pressure seal mechanism for a coal seam drill pipe, characterized by: The sealing assembly (30) is arranged in the sleeve pipe (21) away from the head of the drill pipe (10), and the pressurizing device is communicated with the sleeve pipe (21) close to the head of the drill pipe (10). The pressurizing device comprises a connecting head (23) arranged on the side wall of the sleeve pipe (21), and the connecting head (23) is used to connect the air compressor.
2. The coal seam drill rod air pressure sealing mechanism according to claim 1, characterized in that: The sealing assembly (30) is arranged in the sleeve pipe (21) away from the head of the drill pipe (10), and the pressurizing device is communicated with the sleeve pipe (21) close to the head of the drill pipe (10).
3. The coal seam drill rod air pressure sealing mechanism according to claim 1, characterized in that: The sealing assembly (30) comprises a first sealing ring (31) arranged on the inner wall of the sleeve pipe (21), a second sealing ring (32) arranged on the outer wall of the drill pipe (10), and a rubber ring (33) used to connect the first sealing ring (31) and the second sealing ring (32).
4. The coal seam drill rod air pressure sealing mechanism according to claim 3, characterized in that: The first sealing ring (31) and the inner wall of the sleeve pipe (21) are provided with a sealing ring.
5. The coal seam drill rod air pressure sealing mechanism according to claim 3, characterized in that: The length of the first sealing ring (31) is greater than the length of the second sealing ring (32). The first sealing ring (31) and the second sealing ring (32) are provided with a pair of rubber rings (33), and the interval of the rubber rings (33) close to the inner side of the second sealing ring (32) is smaller than the interval of the rubber rings (33) close to the outer side of the second sealing ring (32).
6. The coal seam drill rod air pressure sealing mechanism according to claim 3, characterized in that: The inner wall of the sleeve pipe (21) is fixedly provided with a limiting ring (26), and the limiting ring (26) is arranged between the sealing assembly (30) and the connecting head (23).
7. The coal seam drill rod air pressure sealing mechanism according to claim 3, characterized in that: The end of the sleeve pipe (21) close to the sealing assembly (30) is provided with a cover plate (24), the cover plate (24) is detachably connected with the sleeve pipe (21), and the cover plate (24) abuts against the first sealing ring (31).