Anti-eruption device for gas extraction pipeline
By using anti-ejection devices on gas extraction pipelines to prevent ejected gas and filter and buffer it, the problem of injury to personnel and equipment caused by ejected materials during gas extraction is solved, and safe gas extraction and early warning functions are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN POLYTECHNIC UNIV
- Filing Date
- 2025-06-24
- Publication Date
- 2026-05-08
AI Technical Summary
During gas extraction, when drilling through gas-rich areas, impurities such as coal gas and coal dust are ejected, causing personal injury and equipment damage, and there is no timely warning.
An anti-eruption device for gas extraction pipelines was designed, including a cover block, an annular filter screen, a buffer component, and an alarm system. It is fixed to the borehole with bolts to block the ejected gas and perform filtering and buffering, while also sounding an alarm when the gas erupts.
It effectively prevents the ejected gas from affecting the outside environment, provides early warning and collection, protects personnel safety, avoids equipment damage, and facilitates subsequent cleanup, thus achieving safe gas extraction.
Smart Images
Figure CN224214150U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of gas extraction technology, specifically an anti-eruption device for gas extraction pipelines. Background Technology
[0002] Gas extraction is a core technology in coal mine safety production. It is mainly used to actively reduce the content and pressure of gas (mainly methane) in coal seams to eliminate potential hazards such as gas outbursts and explosions. During drilling, pressure imbalance in the coal seam can easily lead to the instantaneous high-speed ejection of coal and rock particles and gas (blowout). Blowout prevention devices suppress the impact of ejected materials through buffer chambers (such as dust collection boxes and separation boxes) or negative pressure extraction to avoid personnel casualties and equipment damage.
[0003] In existing technologies, gas extraction requires drilling to form extraction pipelines. However, during the drilling operation, when drilling penetrates some gas-rich areas, excessive amounts of gas, coal dust, or stone impurities may be ejected, which could harm nearby personnel and prevent timely warning operations.
[0004] Therefore, this utility model provides an anti-eruption device for gas extraction pipelines. Utility Model Content
[0005] In order to overcome the shortcomings of the existing technology and solve the problems raised in the background art.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The gas extraction pipeline anti-eruption device of this utility model includes a cover block; a first through groove is opened in the middle of the cover block; a first annular groove is opened on the inner wall of the first through groove; a second annular groove is opened at the top of the first annular groove; a set of bolt posts are opened on the outer wall of the cover block; a pair of symmetrically distributed gas outlet pipes are opened on the cover block; the gas outlet pipes and the second annular groove are connected to each other; a buffer is provided in the second annular groove.
[0007] Preferably, an annular filter screen is fixed between the bottom and top ends of the first annular groove, and the cross-section of the annular filter screen is arranged in an isosceles trapezoidal shape.
[0008] Preferably, the buffer includes an annular sealing plate; the annular sealing plate is slidably connected to the second annular groove; a set of buffer springs is fixedly connected to the top of the annular sealing plate, and the top of the buffer springs is fixedly connected to the bottom of the second annular groove; a positioning plate is fixedly connected to the outer wall of the second annular groove, and the positioning plate is located below the annular sealing plate; the air outlet is located above the positioning plate.
[0009] Preferably, a pair of symmetrically distributed arc-shaped inverted L-shaped plates are fixed to the top of the cover block; a semi-arc groove is formed on the inner wall of the arc-shaped inverted L-shaped plate; a fixing post is fixed to the top of the annular sealing plate, and the top of the fixing post extends out of the cover block and slides in the semi-arc groove.
[0010] Preferably, a positive electrode plate is fixedly connected to the bottom of the horizontal plate of the arc-shaped inverted L-shaped plate; a negative electrode plate is fixedly connected to the top of the fixed column; an alarm light is fixedly connected to the top of the arc-shaped inverted L-shaped plate; when the positive electrode plate and the negative electrode plate come into contact with each other, the alarm light will sound an alarm.
[0011] Preferably, a first groove is formed on the inner arc wall of the inverted L-shaped plate; a locking block is slidably connected in the first groove; a movable plate is slidably connected in the first groove, and the movable plate is connected to the locking block by a spring; a first threaded rod is rotatably connected to the side wall of the movable plate, and the end of the first threaded rod extends out of the inverted L-shaped plate and is threadedly connected to the protrusion; an annular locking groove is formed on the side wall of the fixed column.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. The gas extraction pipeline anti-ejection device of this utility model covers the drilled extraction pipeline with a cover block and fixes it with bolts, so that the first through groove corresponds to the drilling position. During drilling, if an ejection occurs, the first through groove will be covered by the drilling device, and the ejected gas and other impurities will be directly blocked by the cover block to avoid affecting the external environment. At the same time, the splashed gas will be buffered by the buffer component, and a warning will be given. The splashed gas will also be collected to avoid interference and impact on outside personnel.
[0014] 2. The gas extraction pipeline anti-ejection device of this utility model, when an ejection occurs, the gas rises. Due to the blockage of the first through groove, the gas is filtered by the annular filter screen and then enters the second annular groove. This pushes the annular sealing plate upwards, ensuring it is an ejection and preventing simple gas leakage. The upward force of the air jet pushes the annular sealing plate, causing the fixed column to move upwards. When the fixed column reaches the top, the positive and negative plates come into contact, triggering an alarm light. Simultaneously, since an ejection is confirmed, the locking block engages with the annular locking groove under the action of a spring, thus limiting the fixed column and preventing the annular sealing plate from moving downwards, which would affect subsequent gas ejection and collection. In later operations, the cover block is moved upwards to clean impurities, and then the first threaded rod is rotated to disengage the moving plate and locking block from the annular locking groove, allowing the annular sealing plate to move downwards, completing the initial state for easy reuse. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings.
[0016] Figure 1 This is a perspective view of the present invention;
[0017] Figure 2 This is a cross-sectional view of the present invention;
[0018] Figure 3 yes Figure 2 Enlarged view of a portion of point A in the middle;
[0019] Figure 4 yes Figure 3 Enlarged view of a section at point B in the middle;
[0020] Figure 5 It is an exploded view of an inverted L-shaped curved plate;
[0021] Figure 6 It is a 3D view of a ring-shaped filter screen;
[0022] In the diagram: 1. Cover block; 11. First through groove; 12. First annular groove; 13. Bolt post; 14. Second annular groove; 15. Air outlet pipe; 16. Annular filter screen; 2. Annular sealing plate; 21. Buffer spring; 22. Positioning plate; 23. Arc-shaped inverted L-shaped plate; 24. Semi-arc groove; 25. Fixing post; 26. Positive electrode plate; 27. Negative electrode plate; 28. Alarm light; 3. First groove; 31. Locking block; 32. Annular locking groove; 33. Moving plate; 34. First threaded rod. Detailed Implementation
[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0024] like Figures 1 to 6As shown, the present invention discloses an anti-eruption device for a gas extraction pipeline, comprising a cover block 1; a first through groove 11 is formed in the middle of the cover block 1; a first annular groove 12 is formed on the inner wall of the first through groove 11; a second annular groove 14 is formed at the top of the first annular groove 12; a set of bolt posts 13 are formed on the outer wall of the cover block 1; a pair of symmetrically distributed gas outlet pipes 15 are formed on the cover block 1; the gas outlet pipes 15 and the second annular groove 14 are interconnected; a buffer is provided in the second annular groove 14; in the prior art, gas extraction requires drilling to form an extraction pipeline, but during the drilling operation, when drilling penetrates some gas-rich areas, it can lead to... Excessive ejection of gas, coal dust, or stone impurities could harm nearby personnel and prevent timely warning. Therefore, this device, during operation, covers the borehole extraction pipe with a cover block 1 and secures it with bolts 13, aligning the first channel 11 with the borehole position. During drilling, if an ejection occurs, the cover block 1 directly blocks the ejected gas and other impurities, preventing impact on the external environment. Simultaneously, the splashed gas is buffered by a buffer component, providing warning and collecting the splashed gas to avoid interference with personnel.
[0025] An annular filter screen 16 is fixed between the bottom and top ends of the first annular groove 12, and the cross-section of the annular filter screen 16 is an isosceles trapezoid. During operation, the annular filter screen 16 performs a filtration operation, and hard impurities in the splashed gas are initially blocked by the annular filter screen 16. The annular filter screen 16 is inclined, which facilitates the blocking and falling operation, and avoids the impurities attached to the annular filter screen 16 from affecting the gas filtration operation.
[0026] The buffer component includes an annular sealing plate 2; the annular sealing plate 2 is slidably connected to the second annular groove 14; a set of buffer springs 21 are fixedly connected to the top of the annular sealing plate 2, and the top of the buffer springs 21 are fixedly connected to the bottom of the second annular groove 14; a positioning plate 22 is fixedly connected to the outer annular wall of the second annular groove 14, and the positioning plate 22 is located below the annular sealing plate 2; the air outlet pipe 15 is located above the positioning plate 22.
[0027] The top of the cover block 1 is fixed with a pair of symmetrically distributed arc-shaped inverted L-shaped plates 23; a semi-arc groove 24 is provided on the inner wall of the arc-shaped inverted L-shaped plates 23; a fixing post 25 is fixed to the top of the annular sealing plate 2, and the top of the fixing post 25 extends out of the cover block 1 and slides in the semi-arc groove 24.
[0028] A positive electrode plate 26 is fixedly connected to the bottom of the horizontal plate of the arc-shaped inverted L-shaped plate 23; a negative electrode plate 27 is fixedly connected to the top of the fixed column 25; an alarm light 28 is fixedly connected to the top of the arc-shaped inverted L-shaped plate 23; when the positive electrode plate 26 and the negative electrode plate 27 come into contact with each other, the alarm light 28 will sound an alarm.
[0029] A first groove 3 is formed on the inner arc wall of the inverted L-shaped plate 23; a locking block 31 is slidably connected in the first groove 3; a moving plate 33 is slidably connected in the first groove 3, and the moving plate 33 is connected to the locking block 31 by a spring; a first threaded rod 34 is rotatably connected to the side wall of the moving plate 33, and the end of the first threaded rod 34 extends out of the inverted L-shaped plate 23 and is threadedly connected to the protrusion; an annular locking groove 32 is formed on the side wall of the fixed column 25.
[0030] During operation, when the nozzle is activated, the gas rises. Because the first passage 11 is blocked, the rising gas is filtered by the annular filter 16 and then enters the second annular groove 14. This pushes the annular sealing plate 2 upwards, ensuring the nozzle is functioning correctly and preventing simple air leakage. The upward force of the gas pushes the annular sealing plate 2, causing the fixing post 25 to move upwards. When the fixing post 25 reaches its top, the positive plate 26 and the negative plate 27 come into contact, triggering the alarm light 28. Simultaneously, this... When it is determined that it is a spray hole, the locking block 31 will be locked into the annular locking groove 32 under the action of the spring, thereby completing the limiting of the fixed column 25 and preventing the annular sealing plate 2 from moving down, which would affect the subsequent gas spraying and collection. In the later operation, the cover block 1 is moved up as a whole to clean the impurities, and then the first threaded rod 34 is rotated to make the moving plate 33 and the locking block 31 disengage from the annular locking groove 32, thereby allowing them to disengage and the annular sealing plate 2 to move down, completing the initial state and facilitating repeated operation.
[0031] Working principle: When the cover block 1 is placed over the drilling extraction pipe and fixed with bolts 13, the first through slot 11 aligns with the drilling position. During drilling, if a blowout occurs, the cover block 1 directly blocks the ejected gas and other impurities, preventing impact on the external environment. Simultaneously, the splashed gas is buffered by the buffer component, providing an early warning and collecting the splashed gas to avoid interference with personnel. The gas is then filtered by the annular filter 16, which initially blocks hard impurities in the splashed gas. The annular filter 16 is angled for easy blocking and prevents impurities from adhering to it and affecting the filtration process. When a blowout occurs, the gas rises, blocked by the blockage of the first through slot 11, and is then further blocked by the annular filter. The filter screen 16 performs filtration, and then the gas enters the second annular groove 14, pushing the annular sealing plate 2 upward to ensure it is a nozzle, preventing simple gas leakage. The jet force pushes the annular sealing plate 2 upward, causing the fixing post 25 to move upward. When the fixing post 25 moves to the top, the positive electrode plate 26 and the negative electrode plate 27 come into contact with each other, triggering the alarm light 28. At the same time, since it is confirmed to be a nozzle, the locking block 31 will be locked into the annular locking groove 32 under the action of the spring, thus limiting the fixing post 25 and preventing the annular sealing plate 2 from moving downward, which would affect the subsequent gas ejection and collection. In later operations, the cover block 1 is moved upward to clean the impurities, and then the first threaded rod 34 is rotated to disengage the moving plate 33 and the locking block 31 from the annular locking groove 32, allowing them to disengage and the annular sealing plate 2 to move downward, completing the initial state for easy reuse.
[0032] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.
[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, they should not be construed as limiting the scope of protection of this utility model.
[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A gas extraction pipeline anti-eruption device, characterized in that, The device includes a cover block; a first through groove is formed in the middle of the cover block; a first annular groove is formed on the inner wall of the first through groove; a second annular groove is formed at the top of the first annular groove; a set of bolt posts are formed on the outer wall of the cover block; a pair of symmetrically distributed air outlets are formed on the cover block; the air outlets and the second annular groove are connected to each other; a buffer is provided in the second annular groove.
2. The anti-eruption device for a gas extraction pipeline according to claim 1, characterized in that, An annular filter screen is fixed between the bottom and top ends of the first annular groove, and the cross-section of the annular filter screen is arranged in an isosceles trapezoidal shape.
3. The anti-eruption device for a gas extraction pipeline according to claim 2, characterized in that, The buffer component includes an annular sealing plate; the annular sealing plate is slidably connected to the second annular groove; a set of buffer springs is fixedly connected to the top of the annular sealing plate, and the top of the buffer springs is fixedly connected to the bottom of the second annular groove; a positioning plate is fixedly connected to the outer wall of the second annular groove, and the positioning plate is located below the annular sealing plate; the air outlet is located above the positioning plate.
4. The anti-eruption device for a gas extraction pipeline according to claim 3, characterized in that, A pair of symmetrically distributed arc-shaped inverted L-shaped plates are fixed to the top of the cover block; a semi-arc groove is formed on the inner wall of the arc-shaped inverted L-shaped plate; a fixing post is fixed to the top of the annular sealing plate, and the top of the fixing post extends out of the cover block and slides in the semi-arc groove.
5. The anti-eruption device for a gas extraction pipeline according to claim 4, characterized in that, A positive electrode plate is fixed to the bottom of the horizontal plate of the arc-shaped inverted L-shaped plate; a negative electrode plate is fixed to the top of the fixed column; an alarm light is fixed to the top of the arc-shaped inverted L-shaped plate; when the positive electrode plate and the negative electrode plate come into contact with each other, the alarm light will sound an alarm.
6. The anti-eruption device for a gas extraction pipeline according to claim 5, characterized in that, A first groove is formed on the inner arc wall of the inverted L-shaped plate; a locking block is slidably connected in the first groove; a movable plate is slidably connected in the first groove, and the movable plate is connected to the locking block by a spring; a first threaded rod is rotatably connected to the side wall of the movable plate, and the end of the first threaded rod extends out of the inverted L-shaped plate and is threadedly connected to the protrusion; an annular locking groove is formed on the side wall of the fixed column.