Efficient energy-saving gas extraction system, method and equipment

Abstract

The invention discloses an efficient and energy-saving gas extraction system, method and equipment, and the system comprises a dynamic extraction device which achieves selective extraction at different drilling depths; the derrick is used for supporting and accurately positioning the dynamic extraction device; the lifting module is mounted on the derrick and can drive the dynamic extraction device to move in the drilling depth direction; the variable-frequency extraction pump set is connected with the lifting extraction pipe and used for generating negative pressure to extract gas; the real-time monitoring module is used for detecting gas concentration, flow and system energy consumption parameters; the intelligent control unit is used for dynamically adjusting the extraction depth, the extraction range and the pump set power according to the monitoring data; compared with the prior art, energy distribution is optimized, the extraction efficiency is enhanced through structural innovation, the problems of high energy consumption, poor adaptability and easy blockage are solved, and a core technical support is provided for safe and green mining of a coal mine.

Description

Technical Field

[0001] The present invention relates to the technical field of gas extraction, and in particular to a high-efficiency and energy-saving gas extraction system, method and equipment. Background Art

[0002] In coal mine gas extraction, the underground coal seam gas distribution shows significant heterogeneity, and the enrichment areas are discrete and dynamically migrated. Achieving precise extraction of the layers has become the key to improving efficiency and safety. Existing technologies mainly rely on three types of methods: First, mobile fixed-point extraction devices use mechanical struts or air bags to seal the target layer, but the well wall is not tightly fitted, resulting in negative pressure leakage, and the fixed extraction range is difficult to adapt to changes in the coal seam; second, segmented fixed sealing systems, with preset packers for segmented extraction, but the position is not adjustable and cannot respond to the migration of gas-enriched areas; third, constant power pump groups are used for full-well extraction, which continuously consumes high energy but does not work ineffectively in low-concentration areas. These methods generally have the defects of poor sealing reliability, rigid extraction range, and serious energy waste, which restrict extraction efficiency.

[0003] Therefore, it is necessary to provide a high-efficiency and energy-saving gas extraction system, method and equipment to solve the problems raised in the above background technology. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency and energy-saving gas extraction system, comprising:

[0005] Dynamic extraction device to achieve selective extraction at different drilling depths;

[0006] Derrick, used to support and precisely position the dynamic extraction device;

[0007] The lifting module is installed on the derrick and can drive the dynamic extraction device to move along the drilling depth direction;

[0008] The variable frequency extraction pump group is connected to the lifting extraction pipe to generate negative pressure to extract gas;

[0009] Real-time monitoring module to detect gas concentration, flow rate and system energy consumption parameters;

[0010] The intelligent control unit dynamically adjusts the extraction depth, extraction range and pumping power according to monitoring data.

[0011] Furthermore, the dynamic extraction device includes an extraction pipe, a circle of air inlet holes is provided on the side wall of the lower portion of the extraction pipe, and an upper casing and a lower casing are respectively provided on the outer walls of the extraction pipe above and below the air inlet holes, and the upper casing and the lower casing are symmetrically arranged;

[0012] Multiple support plates are distributed on the outer walls of the upper sleeve and the lower sleeve, and sealing rings are distributed on the ends of the upper sleeve and the lower sleeve away from the air inlet.

[0013] Furthermore, the upper sleeve or the lower sleeve is hinged to the corresponding support plate through a plurality of mutually parallel first connecting rods, and the upper sleeve and the lower sleeve are both slidably sleeved with a slip ring at a position between the corresponding support plate and the sealing ring, and a second connecting rod is hinged between the slip ring and the corresponding support plate:

[0014] Telescopic cylinders are fixed to the outer walls of the upper sleeve and the lower sleeve, and the piston shafts of the telescopic cylinders are connected to corresponding slip rings.

[0015] Furthermore, the upper sleeve and the lower sleeve are fixed with a support ring on the side of the corresponding sealing ring close to the air inlet, and the support ring is provided with a plurality of arc-shaped through grooves running through the upper and lower parts. A wedge block is slidably passed through each through groove, and the wedge block is thinner towards the direction close to the air inlet, and the wedge block is fitted to the inner wall of the corresponding sealing ring.

[0016] Furthermore, a plurality of support strips that can slide in the radial direction are distributed around the circumference of the support ring, and the inner walls of the support strips fit into the corresponding wedge blocks.

[0017] Furthermore, each wedge is fixed to a corresponding slip ring.

[0018] Furthermore, the upper casing and the lower casing are both slidably connected to the extraction pipe, and a bottom plate is fixed to the bottom of the extraction pipe, and a block is fixed to the outer wall of the extraction pipe above the air inlet.

[0019] Furthermore, a side groove that passes through the inside and outside is opened on the side wall of the extraction tube corresponding to the position of the lower casing. A slider is slidably arranged in the extraction tube, and the slider is fixed to the inner wall of the lower casing through the side groove. A connecting rod is provided at the center of the slider, and a scraper is fixed to the upper end of the connecting rod, and the scraper is attached to the inner wall of the extraction tube.

[0020] Furthermore, the connecting rod is rotatably connected to the slider, a nut is fixed on the inner wall of the extraction tube below the side groove, a thread is provided on the outer wall of the connecting rod, and the connecting rod is threadedly connected to the nut.

[0021] A high-efficiency and energy-saving gas extraction method, comprising:

[0022] S1. Collect gas concentration, flow rate and system energy consumption parameters in the well through the real-time monitoring module;

[0023] S2. The intelligent control unit dynamically analyzes parameters and generates instructions:

[0024] Sending depth adjustment signals to the lifting module to drive the dynamic extraction device to move to the target coal seam;

[0025] Send power instructions to the variable frequency extraction pump group to adjust the extraction negative pressure intensity;

[0026] S3. Perform operations at the target depth:

[0027] The telescopic cylinder drives the slip ring of the upper casing, causing the support plate to radially expand and clamp the well wall, while pushing the wedge block to radially expand the sealing ring and press the well wall;

[0028] S4. Dynamically adjust the length of the closed section by raising and lowering the extraction pipe:

[0029] After moving the extraction pipe to change the distance between the upper and lower casings, similarly, the support plate and sealing ring corresponding to the lower casing are pressed against the well wall;

[0030] S5. Perform self-cleaning of the air intake holes:

[0031] When the casing is fixed, the lifting and extraction pipe drives the connecting rod to move axially;

[0032] The connecting rod rotates in engagement with the fixed nut through a large lead thread, driving the scraper to scrape the inner wall of the extraction pipe to remove coal ash.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] In the present invention, a breakthrough in efficiency and energy saving in the field of gas extraction is achieved through the deep coordination of intelligent control and mechanical innovation. The system relies on the real-time monitoring module to dynamically perceive the underground working conditions, and the intelligent control unit generates dual instructions: on the one hand, it accurately drives the lifting module to locate the gas-rich layer; on the other hand, it adjusts the power of the variable frequency pump group as needed, significantly reducing ineffective energy consumption.

[0035] In this invention, the dynamic extraction device innovatively adopts a linkage mechanism: a single action can simultaneously complete the radial expansion of the support plate and the tightening of the sealing ring by the wedge block, quickly forming a highly sealed closed extraction area on the well wall, eliminating negative pressure leakage and significantly increasing the gas concentration;

[0036] In the present invention, the extraction range can be flexibly expanded and contracted with changes in the coal seam to adapt to complex geological conditions; and the self-cleaning design converts the lifting movement of the extraction pipe into rotary scraping through mechanical transmission, automatically removing the coal ash from the air inlet hole and ensuring long-term and efficient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a structural diagram of a high-efficiency and energy-saving gas extraction system;

[0038] Figure 2 It is a structural diagram of a dynamic extraction device;

[0039] Figure 3 It is a structural diagram of the upper casing;

[0040] Figure 4 It is a structural diagram of the sealing ring;

[0041] Figure 5 Schematic diagram of the structure inside the casing and the extraction pipe;

[0042] In the figure: 1. extraction tube; 201. upper casing; 202. lower casing; 203. side groove; 204. slider; 205. connecting rod; 206. scraper; 207. nut; 21. support plate; 22. first connecting rod; 23. slip ring; 24. second connecting rod; 25. clamping strip; 3. sealing ring; 31. support ring; 32. support strip; 33. wedge block; 34. through groove; 35. limit block; 4. bottom plate; 5. air inlet; 6. telescopic cylinder; 7. stop block. DETAILED DESCRIPTION

[0043] See also Figure 1-Figure 5 In an embodiment of the present invention, a high-efficiency and energy-saving gas extraction system is characterized by comprising:

[0044] Dynamic extraction device to achieve selective extraction at different drilling depths;

[0045] Derrick, used to support and precisely position the dynamic extraction device;

[0046] The lifting module is installed on the derrick and can drive the dynamic extraction device to move along the drilling depth direction;

[0047] The variable frequency extraction pump group is connected to the lifting extraction pipe to generate negative pressure to extract gas;

[0048] Real-time monitoring module to detect gas concentration, flow rate and system energy consumption parameters;

[0049] The intelligent control unit dynamically adjusts the extraction depth, extraction range and pumping power according to monitoring data.

[0050] The system continuously collects gas concentration, flow and energy consumption data through the real-time monitoring module, and transmits it to the intelligent control unit for dynamic analysis; the control unit generates dual instructions based on the monitoring results: on the one hand, it sends a depth / range adjustment signal to the lifting module to drive the dynamic extraction device to accurately position itself on the derrick to the target coal seam; on the other hand, it outputs power instructions to the variable frequency extraction pump group to implement selective extraction through the negative pressure pipeline; after the extracted gas is merged into the collection system, the new operating condition data is fed back to the monitoring module in real time to achieve adaptive matching of extraction depth, range and extraction power, ultimately achieving the dual goals of efficient extraction and energy saving and consumption reduction.

[0051] In this embodiment, the dynamic extraction device includes an extraction tube 1, a circle of air inlet holes 5 is formed on the side wall of the lower portion of the extraction tube 1, and an upper casing 201 and a lower casing 202 are respectively sleeved on the outer wall of the extraction tube 1 above and below the air inlet holes 5, and the upper casing 201 and the lower casing 202 are symmetrically arranged;

[0052] Multiple support plates 21 are distributed on the outer walls of the upper sleeve 201 and the lower sleeve 202 , and sealing rings 3 are distributed on the ends of the upper sleeve 201 and the lower sleeve 202 away from the air inlet 5 .

[0053] When the support plates 21 of the two upper casings 201 and the lower casing 202 are supported on the well wall of the gas-enriched section, the boreholes above and below the air inlet 5 are sealed by the sealing ring 3, so that the negative pressure generated by the extraction pump only acts on the borehole within the range of the two sealing rings 3, thereby improving the extraction efficiency.

[0054] In this embodiment, the upper sleeve 201 or the lower sleeve 202 is hinged to the corresponding support plate 21 through multiple mutually parallel first connecting rods 22. The upper sleeve 201 and the lower sleeve 202 are both slidably provided with a slip ring 23 at the position between the corresponding support plate 21 and the sealing ring 3, and a second connecting rod 24 is hinged between the slip ring 23 and the corresponding support plate 21.

[0055] That is, by sliding the slip ring 23 toward the air inlet 5 , the support plate 21 can be expanded to support the borehole walls of different diameters.

[0056] In this embodiment, telescopic cylinders 6 are fixed to the outer walls of the upper sleeve 201 and the lower sleeve 202 , and the piston shafts of the telescopic cylinders 6 are connected to the corresponding slip rings 23 .

[0057] That is to say, the corresponding slip ring 23 can be driven to slide by the telescopic cylinder 6 .

[0058] In this embodiment, the upper sleeve 201 and the lower sleeve 202 are fixed with a support ring 31 on the side of the corresponding sealing ring 3 close to the air inlet hole 5. The support ring 31 is provided with a plurality of arc-shaped through grooves 34 running through the upper and lower parts. A wedge block 33 is slidably passed through each through groove 34. The wedge block 33 is thinner in the direction close to the air inlet hole 5, and the wedge block 33 is fitted to the inner wall of the corresponding sealing ring 3.

[0059] By sliding the wedge 33 so that the thicker portion is located inside the sealing ring 3, the sealing ring 3 can be stretched open, thereby fitting it to the well wall to seal the well.

[0060] In this embodiment, a plurality of radially slidable support bars 32 are distributed around the support ring 31 , and inner walls of the support bars 32 fit into corresponding wedge blocks 33 .

[0061] That is to say, when the wedge block 33 stretches the sealing ring 3, it will also cause the support bar 32 to slide outward, so that the support bar 32 can limit the movement of the sealing ring 3 toward the air inlet 5, and when the sealing ring 3 is in a contracted state, the support bar 32 can move inward to avoid getting stuck on the well wall.

[0062] In this embodiment, a plurality of limit blocks 35 are fixed between the gaps between the wedge blocks 33 on the side of the upper sleeve 201 and the lower sleeve 202 away from the air inlet 5 to limit the movement of the sealing ring 3 away from the air inlet 5.

[0063] In this embodiment, a vertical clip 25 is fixed to the outer wall of each support plate 21 .

[0064] When the support plate 21 is attached to the well wall, the clip 25 can be embedded in the well wall, thereby improving the stability of the support.

[0065] In this embodiment, each wedge block 33 is fixed to a corresponding slip ring 23 .

[0066] That is, when the slip ring 23 slides toward the air inlet 5 to expand the support plate 21, the wedge 33 will also expand the sealing ring 3, so that the upper casing 201 or the lower casing 202 is fixed to the well wall and the sealing ring 3 automatically seals the drilling at that location.

[0067] In this embodiment, the upper casing 201 and the lower casing 202 are both slidably connected to the extraction pipe 1, and a bottom plate 4 is fixed to the bottom of the extraction pipe 1, and a block 7 is fixed to the outer wall of the extraction pipe 1 above the air inlet 5.

[0068] That is to say, when the support plate 21 is in a contracted state, the upper casing 201 is attached to the block 7 under the action of gravity. When the support plate 21 of the upper casing 201 is expanded, the upper casing 201 is fixed to the well wall. By raising and lowering the extraction pipe 1, the relative position of the upper casing 201 and the extraction pipe 1 can be changed to change the distance between the upper casing 201 and the lower casing 202, thereby changing the length of the extraction area.

[0069] In this embodiment, a side groove 203 that passes through the inside and outside of the extraction tube 1 is provided on the side wall of the extraction tube 1 corresponding to the position of the lower casing 202. A slider 204 is slidingly provided in the extraction tube 1, and the slider 204 is fixed to the inner wall of the lower casing 202 through the side groove 203. A connecting rod 205 is provided at the center of the slider 204, and a scraper 206 is fixed to the upper end of the connecting rod 205, and the scraper 206 is attached to the inner wall of the extraction tube 1.

[0070] When the support plate 21 of the lower casing 202 is opened, the lower casing 202 is fixed to the well wall. At this time, the position of the slider 204 is also fixed. By slightly raising and lowering the extraction tube 1, the scraper 206 can scrape up and down the inner wall of the extraction tube 1, thereby cleaning the inner wall of the extraction tube 1 at the air inlet hole 5 to scrape off the coal ash at the air inlet hole 5.

[0071] In this embodiment, the connecting rod 205 is rotatably connected to the slider 204 , a nut 207 is fixed on the inner wall of the extraction tube 1 below the side groove 203 , and a thread is formed on the outer wall of the connecting rod 205 , and the connecting rod 205 is threadedly connected to the nut 207 .

[0072] The threads on the outer wall of the nut 207 and the connecting rod 205 are large lead threads. When the connecting rod 205 slides up and down relative to the nut 207, the connecting rod 205 rotates, so that the scraper 206 rotates as it scrapes up and down the inner wall of the extraction tube 1 to improve the cleaning effect.

[0073] A high-efficiency and energy-saving gas extraction method, comprising:

[0074] S1. Collect gas concentration, flow rate and system energy consumption parameters in the well through the real-time monitoring module;

[0075] S2. The intelligent control unit dynamically analyzes parameters and generates instructions:

[0076] Sending depth adjustment signals to the lifting module to drive the dynamic extraction device to move to the target coal seam;

[0077] Send power instructions to the variable frequency extraction pump group to adjust the extraction negative pressure intensity;

[0078] S3. Perform linkage operations at the target depth:

[0079] The telescopic cylinder 6 drives the slip ring 23 of the upper casing 201, causing the support plate 21 to radially expand and clamp the well wall, while pushing the wedge 33 to radially expand the sealing ring 3 and press the well wall;

[0080] S4. Dynamically adjust the length of the closed section by raising and lowering the extraction pipe 1:

[0081] After the extraction pipe 1 is moved to change the distance between the upper casing 201 and the lower casing 202, similarly, the support plate 21 and the sealing ring 3 corresponding to the lower casing 202 are pressed against the well wall;

[0082] S5. Perform self-cleaning of the air intake holes:

[0083] When the lower casing 202 is fixed, the lifting and extraction pipe 1 drives the connecting rod 205 to move axially;

[0084] The connecting rod 205 is engaged and rotated with the fixing nut 207 through a large lead thread, driving the scraper 206 to scrape the inner wall of the extraction pipe 1 to remove the coal ash.

[0085] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-efficiency and energy-saving gas extraction system, characterized in that: include: Dynamic extraction device to achieve selective extraction at different drilling depths; Derrick, used to support and precisely position the dynamic extraction device; The lifting module is installed on the derrick and can drive the dynamic extraction device to move along the drilling depth direction; The variable frequency extraction pump group is connected to the lifting extraction pipe to generate negative pressure to extract gas; Real-time monitoring module to detect gas concentration, flow rate and system energy consumption parameters; The intelligent control unit dynamically adjusts the extraction depth, extraction range and pumping power according to monitoring data.

2. The high-efficiency and energy-saving gas extraction system according to claim 1, characterized in that: The dynamic extraction device comprises an extraction tube (1), wherein a circle of air inlet holes (5) are provided on the side wall of the lower portion of the extraction tube (1), and an upper casing (201) and a lower casing (202) are respectively sleeved on the outer wall of the extraction tube (1) above and below the air inlet holes (5), wherein the upper casing (201) and the lower casing (202) are symmetrically arranged; Multiple support plates (21) are distributed on the outer walls of the upper sleeve (201) and the lower sleeve (202), and sealing rings (3) are distributed on the ends of the upper sleeve (201) and the lower sleeve (202) away from the air inlet (5).

3. The high-efficiency and energy-saving gas extraction system according to claim 2, characterized in that: The upper sleeve (201) or the lower sleeve (202) is hinged to the corresponding support plate (21) through a plurality of mutually parallel first connecting rods (22), and the upper sleeve (201) and the lower sleeve (202) are both slidably provided with a slip ring (23) at a position between the corresponding support plate (21) and the sealing ring (3), and a second connecting rod (24) is hinged between the slip ring (23) and the corresponding support plate (21): A telescopic cylinder (6) is fixed to the outer walls of the upper sleeve (201) and the lower sleeve (202), and the piston shaft of the telescopic cylinder (6) is connected to the corresponding slip ring (23).

4. The high-efficiency and energy-saving gas extraction system according to claim 3, characterized in that: The upper sleeve (201) and the lower sleeve (202) are fixed with a support ring (31) on one side of the corresponding sealing ring (3) close to the air inlet (5), and the support ring (31) is provided with a plurality of arc-shaped through grooves (34) extending vertically therethrough, and a wedge block (33) is slidably passed through each through groove (34), and the wedge block (33) is thinned in a direction close to the air inlet (5), and the wedge block (33) is fitted to the inner wall of the corresponding sealing ring (3).

5. The high-efficiency and energy-saving gas extraction system according to claim 4, characterized in that: A plurality of radially slidable support strips (32) are distributed around the support ring (31), and the inner walls of the support strips (32) fit into corresponding wedge blocks (33).

6. The high-efficiency and energy-saving gas extraction system according to claim 4, characterized in that: Each wedge (33) is fixed to a corresponding slip ring (23).

7. The high-efficiency and energy-saving gas extraction system according to claim 1, characterized in that: The upper casing (201) and the lower casing (202) are both slidably connected to the extraction pipe (1), and a bottom plate (4) is fixed to the bottom of the extraction pipe (1), and a stopper (7) is fixed to the outer wall of the extraction pipe (1) above the air inlet (5).

8. The high-efficiency and energy-saving gas extraction system according to claim 7, characterized in that: A side groove (203) is provided on the side wall of the extraction tube (1) corresponding to the position of the lower casing (202), and the side groove (203) is penetrated from inside to outside. A slider (204) is provided in the extraction tube (1) for sliding, and the slider (204) is fixed to the inner wall of the lower casing (202) through the side groove (203). A connecting rod (205) is provided at the center of the slider (204), and a scraper (206) is fixed to the upper end of the connecting rod (205), and the scraper (206) is attached to the inner wall of the extraction tube (1).

9. The high-efficiency and energy-saving gas extraction system according to claim 8, characterized in that: The connecting rod (205) is rotatably connected to the slider (204); a nut (207) is fixedly mounted on the inner wall of the extraction tube (1) below the side groove (203); a thread is formed on the outer wall of the connecting rod (205); and the connecting rod (205) is threadedly connected to the nut (207).

10. A high-efficiency and energy-saving gas extraction method, using a high-efficiency and energy-saving gas extraction system and device according to any one of claims 1 to 9, characterized in that: include: S1. Collect gas concentration, flow rate and system energy consumption parameters in the well through the real-time monitoring module; S2. The intelligent control unit dynamically analyzes parameters and generates instructions: Sending depth adjustment signals to the lifting module to drive the dynamic extraction device to move to the target coal seam; Send power instructions to the variable frequency extraction pump group to adjust the extraction negative pressure intensity; S3. Perform operations at the target depth: The telescopic cylinder (6) drives the slip ring (23) of the upper casing (201), so that the support plate (21) is radially expanded and clamped to the well wall, and at the same time pushes the wedge block (33) to radially expand the sealing ring (3) and press the well wall; S4. Dynamically adjust the length of the closed section by raising and lowering the extraction pipe (1): After the extraction pipe (1) is moved to change the distance between the upper casing (201) and the lower casing (202), similarly, the support plate (21) and the sealing ring (3) corresponding to the lower casing (202) are pressed against the well wall; S5. Perform self-cleaning of the air intake holes: When the lower casing (202) is fixed, the lifting and extraction pipe (1) drives the connecting rod (205) to move axially; The connecting rod (205) is engaged and rotated with the fixing nut (207) through the large lead thread, driving the scraper (206) to scrape the inner wall of the extraction pipe (1) to remove the coal ash.

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