High-safety gas extraction device for coal mine gas control

By designing a gas extraction device with a step-incremented suction rod and a suction pipeline arranged in parallel, the problem of difficulty in pumping gas at long distance gaps in coal seams in the prior art is solved, and more efficient and thorough gas extraction is achieved, ensuring the safety of coal mining.

CN222879716UActive Publication Date: 2025-05-16CHINA COAL TECH & ENG GRP SHENYANG ENG CO +1
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Patent Information

Application Number
CN202421611915.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-09
Publication Date
2025-05-16
Estimated Expiration
2034-07-09

AI Technical Summary

Technical Problem

The existing coal mine gas extraction technology is difficult to effectively extract gas in the gap far away from the drilling hole in the coal seam, which affects the suction effect and thoroughness, and thus affects the safety of coal mine mining.

Method used

A gas extraction device including N suction rods is designed. The length of the suction rod is arranged stepwise. The suction of multiple suction chambers is realized through multiple suction pipe lines arranged in parallel and the sealing limit sleeve member. The controller is used to control the suction pump group and the control valve action to realize the gradual suction of suction rods of different lengths.

Benefits of technology

The multiple suction chambers are suctioned through suction rods of different lengths, which effectively extracts gas at long-distance gaps in the coal seam, improves the effect and thoroughness of suction, and ensures the safety of coal mining.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the field of gas extraction, and particularly relates to a high-safety gas extraction device for coal mine gas control, which comprises a suction interface, a suction main sleeve, a sealing limiting sleeve, N suction rods, a sealing sleeve component and a suction pump set, N is an integer greater than or equal to 3, the output end of the suction pump set is detachably connected to the suction interface, and the suction main sleeve is sleeved on the sealing limiting sleeve. The end of the suction connector is integrally connected to the suction main sleeve, the suction connector is communicated with the interior of the suction main sleeve, the end of each suction pipeline is connected with a suction rod in a sealed mode, the lengths of the suction rods are different, and each suction rod is provided with a sealing connector. The suction rods with different lengths are used for sucking a plurality of suction cavities, N suction rods can be used for sucking at the same time, a single suction rod can also be controlled for sucking, and finally extraction at the position of an extraction hole is completed.
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Description

Technical Field

[0001] The utility model belongs to the field of gas extraction, and in particular relates to a gas extraction device with high safety for coal mine gas management. Background Art

[0002] At present, in order to ensure the safety of coal mines, it is necessary to extract gas from coal seams at all times to reduce the gas content in the mine as much as possible. The current extraction is generally done by suction pumps, and the current suction method is generally simple. The suction pressure of this method is always in a relatively stable state, and the suction force is difficult to effectively amplify, and it is difficult to achieve gas extraction in the gaps in the coal seams far from the borehole, which affects the effect and thoroughness of the suction and is difficult to ensure the safety of coal mining. Utility Model Content

[0003] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a gas extraction device for coal mine gas control with high safety.

[0004] A gas extraction device for coal mine gas control with high safety, comprising a suction interface, a suction main sleeve, a sealing limit sleeve, N suction rods, a sealing sleeve component and a suction pump group, wherein N is an integer greater than or equal to 3, the output end of the suction pump group is detachably connected to the suction interface, the end of the suction interface is integrally connected to the suction main sleeve, a plurality of suction pipelines arranged in parallel are arranged in the suction main sleeve, each suction pipeline is connected to the suction interface, the end of each suction pipeline is sealed and connected to a suction rod, the lengths of the suction rods are different, and the lengths of the first suction rod to the Nth suction rod are arranged in a step-by-step manner. A sealing interface is arranged on each suction rod, the sealing interface of the ith suction rod is connected with the ith sealing sleeve component, and the ith+1th suction rod to the Nth suction rod are all sealed and penetrate the ith sealing sleeve component, and the 1st to the i-1th suction rods do not penetrate the ith sealing sleeve component, wherein i is an integer greater than or equal to 1 and less than or equal to N-1; the sealing sleeve component is arranged below the suction main sleeve, and the suction rod passes through the sealing sleeve component; during the extraction operation, the sealing sleeve of the sealing sleeve component is limited to be located in the extraction hole, and the sealing limit sleeve is positioned and blocked at the end of the extraction hole.

[0005] The spacing cavity between the sealing limit sleeve and the first sealing sleeve component is the first suction cavity, and the spacing cavity between the i+1th sealing sleeve component and the i-th sealing sleeve component is the i+1th suction cavity, wherein i is an integer greater than or equal to 1 and less than or equal to N-1, and the depth of the i-th suction cavity in the axial direction of the suction rod is greater than the depth of the i+1th suction cavity in the axial direction of the suction rod.

[0006] The sealing limit sleeve is provided with a controller, each suction pipeline is provided with a control valve, the control valve is arranged in the suction main sleeve, and the controller controls the action of the suction pump group and the control valve.

[0007] The controller is configured such that, at the initial stage of suction, the controller controls each control valve to open simultaneously so as to use the suction pipeline to simultaneously suction N suction rods; after suctioning for a certain period of time, the controller controls the control valve corresponding to the first suction rod to open, and the other control valves to close, to achieve suction of the first suction chamber; after suctioning for a set time, the controller controls the control valve corresponding to the second suction rod to open, and the other control valves to close, to achieve suction of the second suction chamber; and so on, until suction of the Nth suction chamber is achieved, and then, start from the Nth suction chamber until suction of the first suction chamber is achieved; then, start suction from the first suction chamber again, and so on, until the suction at the extraction hole is completed.

[0008] A one-way valve is provided between the sealing sleeve component and the sealing interface on the suction rod, and the one-way valve controls the expansion of the sealing sleeve component to achieve sealing with the inner wall of the extraction hole; after the suction rod and the sealing sleeve component are extended into the corresponding positions in the extraction hole and before suction, the suction pipeline and the suction rod are first used to flush the fluid medium into the sealing sleeve component, so that the sealing sleeve component expands under the action of the one-way valve to achieve sealing and blocking with the inner wall of the extraction hole.

[0009] The sealing sleeve component includes a first limiting ring disk, a second limiting ring disk and an expansion sleeve, the first limiting ring disk and the second limiting ring disk are respectively fixedly arranged on both sides of the expansion sleeve, and a plurality of limiting grooves are arranged in a circumferential array on the inner wall of the central hole of the first limiting ring disk and the second limiting ring disk; the expansion sleeve is an annular structure, and the first limiting ring disk, the second limiting ring disk and the expansion sleeve are composed of an integral sleeve arranged at the sealing interface of the suction rod, and the expansion sleeve is made of elastic material, and the fluid medium can flow into the expansion sleeve through the suction rod, the sealing interface and the one-way valve, so that the expansion sleeve expands in all directions in the radial direction.

[0010] A plurality of axially extending limiting shoulders are arranged in a circumferential array at the sealing interface, and the limiting shoulders are engaged with the limiting grooves to limit and fix the sealing sleeve component.

[0011] The sealing limit sleeve includes an outer sealing flange and a sealing ring. A sealing ring is coaxially fixed on the inner side of the outer sealing flange. A plurality of through holes are arranged in a circumferential array on the sealing ring. The end of the suction rod or the suction pipeline passes through the through hole. The sealing ring sealing sleeve is engaged with the inner wall of the end of the suction hole.

[0012] A pressure detector is provided on each suction pipeline of the suction main sleeve to detect the suction pressure in the suction pipeline.

[0013] The beneficial effects of the utility model are:

[0014] The utility model is provided with N suction rods, and the lengths of the suction rods are arranged in a stepped manner. The interval cavity between the sealing limit sleeve and the sealing sleeve component is the suction cavity. Suction rods of different lengths form a plurality of suction cavities. The utility model uses suction rods of different lengths to suction the plurality of suction cavities. N suction rods can be used for suction at the same time, or a single suction rod can be controlled for suction, thereby finally completing the extraction at the extraction hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall main structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the top-side three-dimensional structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the sealing limit sleeve of the utility model;

[0018] Figure 4 It is a partial structural schematic diagram of the suction rod of the utility model;

[0019] Figure 5 It is a schematic diagram of the main structure of the sealing sleeve component of the utility model;

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the sealing sleeve component of the utility model;

[0021] In the attached drawings: 1. suction interface; 2. suction main sleeve; 3. sealing limit sleeve; 4. suction rod; 5. sealing sleeve component; 6. suction chamber; 7. sealing ring; 8. through hole; 9. sealing interface; 10. first limit ring disk; 11. expansion sleeve; 12. second limit ring disk; 13. limit groove; 14. limit shoulder; 15. external sealing flange. DETAILED DESCRIPTION

[0022] The following will be combined with the attached Figure 1-6 The utility model is described in detail, and the technical solutions in the embodiments are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a gas extraction device for coal mine gas control with high safety, which comprises a suction interface 1, a suction main sleeve 2, a sealing limit sleeve 3, N suction rods 4, a sealing sleeve component 5 and a suction pump group, wherein N is an integer greater than or equal to 3, the output end of the suction pump group is detachably connected to the suction interface 1, the end of the suction interface 1 is integrally connected to the suction main sleeve 2, a plurality of suction pipelines arranged in parallel are arranged in the suction main sleeve 2, each of the suction pipelines is connected to the suction interface 1, and the end of each suction pipeline is sealed and connected to a suction rod 4, the lengths of the suction rods 4 are different, and the first suction rod 4 to the Nth suction rod 4 are connected to the suction rod 4. The length of 4 is arranged in a step-by-step manner, and a sealing interface 9 is arranged on each of the suction rods 4. The sealing interface 9 of the i-th suction rod is connected with the i-th sealing sleeve component 5, and the i+1-th suction rods 4 to the N-th suction rods 4 are all sealed and penetrate the i-th sealing sleeve component 5, and the 1st to the i-1-th suction rods 4 do not penetrate the i-th sealing sleeve component 5, wherein i is an integer greater than or equal to 1 and less than or equal to N-1; the sealing sleeve component 5 is arranged below the suction main sleeve 2, and the suction rod 4 passes through the sealing sleeve component 5; during the extraction operation, the sealing sleeve component 5 is limited to be located in the extraction hole, and the sealing limit sleeve 3 is positioned and blocked at the end of the extraction hole.

[0024] In this embodiment, during extraction, the interval cavity between the sealing limit sleeve 3 and the first sealing sleeve component 5 is the first suction cavity 6, and the interval cavity between the i+1th sealing sleeve component 5 and the i-th sealing sleeve component 5 is the i+1th suction cavity 6, wherein i is an integer greater than or equal to 1 and less than or equal to N-1, and the depth of the i-th suction cavity in the axial direction of the suction rod is greater than the depth of the i+1th suction cavity 6 in the axial direction of the suction rod.

[0025] As a preferred embodiment, the utility model further comprises a controller and a plurality of control valves arranged in the suction main sleeve 2, each of the suction pipelines is provided with a control valve, and the controller controls the actions of the suction pump group and the control valves.

[0026] Wherein, the controller is configured such that, at the initial stage of suction, the controller controls each control valve to open simultaneously so as to utilize the suction pipeline to simultaneously suction N suction rods; after suctioning for a certain period of time, the controller controls the control valve corresponding to the first suction rod to open, and the other control valves to close, so as to realize suction of the first suction chamber; after suctioning to the set time, the control valve corresponding to the second suction rod is controlled to open, and the other control valves are controlled to close, so as to realize suction of the second suction chamber; and so on, until suction of the Nth suction chamber is realized, and then, starting from the Nth suction chamber until suction of the first suction chamber is realized; then, suction is started from the first suction chamber again, and so on, until the suction at the extraction hole is completed.

[0027] A one-way valve is provided between the sealing sleeve component 5 and the sealing interface 9 on the suction rod 4, and the one-way valve controls the expansion of the sealing sleeve component 5 to achieve sealing with the inner wall of the extraction hole; after the suction rod 4 and the sealing sleeve component 5 are extended into the corresponding positions in the extraction hole and before suction, the suction pipeline and the suction rod 4 are used to first flush the fluid medium into the sealing sleeve component 5, so that the sealing sleeve component 5 expands under the action of the one-way valve to achieve sealing and blocking with the inner wall of the extraction hole.

[0028] The sealing sleeve component 5 includes a first limiting ring disk 10, a second limiting ring disk 12 and an expansion sleeve 11. The first limiting ring disk 10 and the second limiting ring disk 12 are respectively fixedly arranged on both sides of the expansion sleeve 11. A plurality of limiting grooves 13 are arranged in a circumferential array on the inner wall of the center hole of the first limiting ring disk 10 and the second limiting ring disk 12. The expansion sleeve 11 is an annular structure. The first limiting ring disk 10, the second limiting ring disk 12 and the expansion sleeve 11 are integrally sleeved at the sealing interface 9 of the suction rod 4. The expansion sleeve 11 is made of elastic material. The fluid medium can flow into the expansion sleeve 11 through the suction rod 4, the sealing interface 9 and the one-way valve, so that the expansion sleeve expands in all directions in the radial direction.

[0029] A plurality of axially extending limiting shoulders 14 are arranged in a circumferential array at the sealing interface 9 , and the limiting shoulders 14 are engaged with the limiting grooves 13 to limit and fix the sealing sleeve component.

[0030] The sealing limit sleeve 3 includes an outer sealing flange 15 and a sealing ring 7. The sealing ring 7 is coaxially fixedly arranged at the end of the outer sealing flange 15. A plurality of through holes 8 are arranged in a circumferential array on the sealing ring. The end of the suction rod 4 or the suction pipeline is arranged through the through hole 8. The sealing ring 7 sealing sleeve is engaged with the inner wall of the end of the suction hole 4.

[0031] A pressure detector is provided on each suction pipeline of the suction main sleeve to detect the suction pressure in the suction pipeline.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model, and the standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas extraction device for coal mine gas control with high safety, characterized in that: The invention comprises a suction interface, a suction main sleeve, a sealing limit sleeve, N suction rods, a sealing sleeve component and a suction pump group, wherein N is an integer greater than or equal to 3, the output end of the suction pump group is detachably connected to the suction interface, the end of the suction interface is integrally connected to the suction main sleeve, a plurality of suction pipelines arranged in parallel are arranged in the suction main sleeve, each suction pipeline is connected to the suction interface, the end of each suction pipeline is sealed and connected to a suction rod, the lengths of the suction rods are different, and the lengths of the first suction rod to the Nth suction rod are arranged in a step-by-step manner, and each suction rod is provided with There is a sealing interface, the sealing interface of the i-th suction rod is connected with the i-th sealing sleeve component, and the i+1-th suction rod to the N-th suction rod are all sealed and penetrate the i-th sealing sleeve component, and the 1st to the i-1-th suction rods do not penetrate the i-th sealing sleeve component, wherein i is an integer greater than or equal to 1 and less than or equal to N-1; the sealing sleeve component is arranged below the suction main sleeve, and the suction rod passes through the sealing sleeve component; during the extraction operation, the sealing sleeve of the sealing sleeve component is limited to be located in the extraction hole, and the sealing limit sleeve is positioned and blocked at the end of the extraction hole.

2. A gas extraction device for coal mine gas control with high safety according to claim 1, characterized in that: The spacing cavity between the sealing limit sleeve and the first sealing sleeve component is the first suction cavity, and the spacing cavity between the i+1th sealing sleeve component and the i-th sealing sleeve component is the i+1th suction cavity, wherein i is an integer greater than or equal to 1 and less than or equal to N-1, and the depth of the i-th suction cavity in the axial direction of the suction rod is greater than the depth of the i+1th suction cavity in the axial direction of the suction rod.

3. A gas extraction device for coal mine gas control with high safety according to claim 1, characterized in that: The sealing limit sleeve is provided with a controller, each suction pipeline is provided with a control valve, the control valve is arranged in the suction main sleeve, and the controller controls the action of the suction pump group and the control valve.

4. A gas extraction device for coal mine gas control with high safety according to claim 1, characterized in that: A one-way valve is arranged between the sealing sleeve component and the sealing interface on the suction rod, and the one-way valve controls the expansion of the sealing sleeve component to achieve sealing between the sealing sleeve component and the inner wall of the extraction hole.

5. A gas extraction device for coal mine gas control with high safety according to claim 1, characterized in that: The sealing sleeve component includes a first limiting ring disk, a second limiting ring disk and an expansion sleeve. The first limiting ring disk and the second limiting ring disk are respectively fixedly arranged on both sides of the expansion sleeve. A plurality of limiting grooves are arranged in a circumferential array on the inner wall of the center hole of the first limiting ring disk and the second limiting ring disk. The expansion sleeve is an annular structure. The first limiting ring disk, the second limiting ring disk and the expansion sleeve are integrally arranged at the sealing interface of the suction rod. The expansion sleeve is made of elastic material.

6. A gas extraction device for coal mine gas control with high safety according to claim 5, characterized in that: A plurality of axially extending limiting shoulders are arranged in a circumferential array at the sealing interface, and the limiting shoulders are limitedly engaged with the limiting grooves.

7. A gas extraction device for coal mine gas control with high safety according to claim 1, characterized in that: The sealing limit sleeve includes an outer sealing flange and a sealing ring. A sealing ring is coaxially fixed on the inner side of the outer sealing flange. A plurality of through holes are arranged in a circumferential array on the sealing ring. The end of the suction rod or the suction pipeline passes through the through hole. The sealing ring sealing sleeve is engaged with the inner wall of the end of the suction hole.

8. A gas extraction device for coal mine gas control with high safety according to claim 1, characterized in that: A pressure detector is provided on each suction pipeline of the suction main sleeve.