A deep coalbed methane gas sampling device

Abstract

This utility model relates to the field of coalbed methane gas sampling technology, specifically a deep coalbed methane gas sampling device, including a collection box and a storage mechanism. The storage mechanism is installed on the left side of the inside of the collection box, and the collection mechanism is installed on the right side of the inside of the collection box. The storage mechanism includes a placement frame, a No. A protective cylinder, a No. B protective cylinder, and a collection cylinder. Multiple sets of No. A and No. B protective cylinders are placed in the placement frame, and a collection cylinder is placed inside each of the No. A and No. B protective cylinders. The collection mechanism includes a pusher and a positioning block. A filling port is opened in the positioning block, and the collection cylinder is filled into the filling port. The pusher pushes the collection cylinder to collect gas. The device is mounted on a mobile device via a mounting frame on the bottom side of the collection box, facilitating the collection of deep coalbed methane, saving time and reducing safety hazards. The upper and lower sealing cylinders provide secondary protection for the collection cylinder, further improving the sealing of the box and facilitating subsequent testing.

Description

Technical Field

[0001] This utility model relates to the field of coalbed methane gas sampling technology, specifically a deep coalbed methane gas sampling device. Background Technology

[0002] With the growth of energy demand and the gradual development of shallow coalbed methane resources, deep coalbed methane has become an important development target due to its abundant reserves. However, deep coal seams are characterized by high pressure, high temperature and complex geological structure, which makes gas sampling of deep coalbed methane face many challenges. Existing sampling technologies and equipment are difficult to meet the requirements of deep sampling, and targeted technical improvements are urgently needed. For example, CN215296855U discloses a coalbed methane gas sampling device, specifically relating to the field of coalbed methane technology. The device includes a sampling box, a control panel fixedly installed on the outside of the sampling box, a protective shell fixedly installed on the bottom surface of the inner cavity of the sampling box, a compressor housed inside the protective shell, an outlet pipe fixedly connected to one end of the compressor, an inlet pipe fixedly connected to the other end of the compressor, a gas storage tank located on the bottom surface of the inner cavity of the sampling box, a collection pipe connected to the outer wall of the gas storage tank, and a gas collection hood fixedly installed at one end of the collection pipe. In the above scheme, by setting up a compressor and a gas storage tank, the air inside the gas storage tank can be extracted first, and the coalbed methane can be drawn in using the pressure difference, thus achieving the effect of coalbed methane collection. This avoids the experimental errors caused by the drainage method and also saves working steps. By setting up a first solenoid valve and a second solenoid valve, it can be ensured that the gas will not leak out, which facilitates subsequent detection and sampling. Existing sampling devices are prone to coal and rock debris falling off and borehole collapse during the sampling process, making it difficult for traditional rigid samplers to be successfully lowered to the target layer, or the device may be damaged by mechanical impact during sampling, affecting the detection efficiency. At the same time, the content of coalbed methane varies in different locations of the coal seam, and a single storage chamber cannot collect data from the remaining parts separately, resulting in certain differences in the detection data. Therefore, it is urgent to design a deep coalbed methane gas sampling device to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a deep coalbed methane gas sampling device to solve the problems mentioned in the background art. Existing sampling devices are prone to coal and rock debris falling off and borehole collapse during the sampling process, which makes it difficult for traditional rigid samplers to be successfully lowered to the target layer, or the device may be damaged by mechanical impact during sampling, affecting the detection efficiency. At the same time, the content of coal seam varies in different locations, and a separate storage chamber cannot collect data from the remaining parts separately, resulting in certain differences in the detected data.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a deep coalbed methane gas sampling device, comprising a sampling box and a storage mechanism. The storage mechanism is installed on the left side inside the sampling box, and the sampling mechanism is installed on the right side inside the sampling box. The storage mechanism includes a placement frame, a No. A protective cylinder, a No. B protective cylinder, and a sampling cylinder. Multiple sets of No. A and No. B protective cylinders are placed inside the placement frame. Each No. A and No. B protective cylinder contains a sampling cylinder. The sampling mechanism includes a pusher and a positioning block. A filling port is opened in the positioning block, and the sampling cylinder is filled into the filling port. The pusher pushes the sampling cylinder to collect data.

[0005] Preferably, the inside of the data collection box is equipped with a partition plate, the front end of the data collection box is equipped with an outer cover, the outer cover can be completely sealed when closed, a through opening is provided on the right side of the inside of the data collection box, and mounting brackets are installed on both sides of the bottom of the data collection box. The data collection box is mounted on a mobile device via the mounting brackets for convenient movement and data collection.

[0006] Preferably, the protective cylinders A and B have the same overall structure, with the protective cylinder A being taller than the protective cylinder B. The collection cylinder after collection is placed inside the protective cylinder A, and the collection cylinder for collection is placed inside the protective cylinder B.

[0007] Preferably, the protective cylinder A includes an upper sealing cylinder and a lower sealing cylinder. An upper sealing ring is installed on the outer side of the bottom end of the upper sealing cylinder, and a lower sealing ring is installed on the outer side of the top end of the lower sealing cylinder. A rolled foam pad is placed at the bottom inside the lower sealing cylinder, and the upper sealing ring and the lower sealing ring are fitted together.

[0008] Preferably, the collection tube includes an air extraction tube and a piston. A piston shaft is installed at the top of the inside of the air extraction tube, a piston is installed at the center of the piston shaft, a piston handle is installed at the top of the piston, and the top of the piston handle is L-shaped. An air inlet is opened at the bottom of the air extraction tube, and a sealing sleeve is wrapped around the bottom of the air inlet.

[0009] Preferably, the pushing component includes a battery and a servo motor. The servo motor is mounted on the top of the battery, and a reducer is mounted on the rear end of the servo motor. The rear end of the reducer drives the ball screw with a limit to rotate. A screw spool is threaded onto the center of the ball screw, and a pushing frame is mounted on the top of the screw spool. The two ends of the pushing frame are sleeved on the center of the slide rod. The front ends of the two sets of slide rods are fixed to the rear wall of the fixed block, and the top of the pushing frame is placed on the bottom side of the piston handle.

[0010] Preferably, the pusher includes a crossbar and side blocks. A fixing groove is provided at the center of the top of the crossbar. Side blocks are fixed on both sides inside the fixing groove. A rotatable rotating plate is installed at the center of the two sets of side blocks. The front side of the top of the crossbar is lower than the rear side.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This deep coalbed methane gas sampling device is mounted on a mobile device via a mounting bracket on the bottom side of the sampling box, facilitating the collection of deep coalbed methane, saving time and reducing safety hazards. The piston inside the sampling cylinder allows for convenient and quick collection of external coalbed methane. The upper and lower sealing cylinders provide secondary protection for the sampling cylinder, further enhancing the sealing and facilitating subsequent testing.

[0012] This deep coalbed methane gas sampling device improves sampling efficiency by installing multiple sets of A and B protective cylinders inside the mounting frame. It collects and detects data from multiple locations within the coal seam for more accurate results. The device can pump coalbed methane into the extraction cylinder by pulling the piston handle while moving the pusher frame. No manual extraction is required during the sampling process, further reducing safety hazards. Attached Figure Description

[0013] Figure 1 This is a front view of the unfolded part of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a side view of the storage mechanism of this utility model; Figure 4 This is a cross-sectional schematic diagram of the main body of the storage mechanism of this utility model; Figure 5 This is a side view of the data acquisition mechanism of this utility model; Figure 6 This is an enlarged schematic diagram of the pusher structure of this utility model.

[0014] In the diagram: 1. Collection box; 11. Spare plate; 12. Outer cover; 13. Through-hole; 2. Mounting frame; 3. Storage mechanism; 31. Placement rack; 32. Protective cylinder A; 321. Upper sealing cylinder; 3211. Upper sealing ring; 322. Lower sealing cylinder; 3221. Lower sealing ring; 3222. Foam pad; 33. Protective cylinder B; 34. Collection cylinder; 341. Evacuation cylinder; 342. Air inlet; 343. Sealing sleeve; 344 345. Piston; 346. Piston handle; 4. Acquisition mechanism; 41. Pushing component; 411. Battery; 412. Servo motor; 413. Reducer; 414. Ball screw; 415. Screw; 416. Pushing frame; 4161. Crossbar; 4162. Fixing groove; 4163. Side block; 4164. Rotating plate; 417. Slide rod; 418. Fixing block; 42. Positioning block; 421. Filling port. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-6 One embodiment provided by this utility model: A deep coalbed methane gas sampling device is disclosed. The servo motor 412, battery 411, and reducer 413 used in this application are commercially available products. Their principles and connection methods are existing technologies well known to those skilled in the art. The device includes a sampling box 1 and a storage mechanism 3. The storage mechanism 3 is installed on the left side of the inside of the sampling box 1, and a sampling mechanism 4 is installed on the right side of the inside of the sampling box 1. The storage mechanism 3 includes a placement frame 31, a protective cylinder A 32, a protective cylinder B 33, and a sampling cylinder 34. Multiple sets of protective cylinders A 32 and B 33 are placed in the placement frame 31. A sampling cylinder 34 is placed in each of the protective cylinders A 32 and B 33. The sampling mechanism 4 includes a pusher 41 and a positioning block 42. A filling port 421 is opened in the positioning block 421, and the sampling cylinder 34 is filled in the filling port 421. The pusher 41 pushes the sampling cylinder 34 to collect data.

[0017] As a further feature of this invention, a partition plate 11 is installed inside the collection box 1, and an outer cover 12 is installed at the front end of the collection box 1. The outer cover 12 can be completely sealed when closed. A through opening 13 is provided on the right side inside the collection box 1. Mounting brackets 2 are installed on both sides of the bottom end of the collection box 1. The collection box 1 is mounted on a mobile device through the mounting brackets 2 for convenient movement and collection, thereby improving efficiency.

[0018] Furthermore, the overall structure of protective cylinder A 32 and protective cylinder B 33 is the same, with protective cylinder A 32 being higher than protective cylinder B 33. Protective cylinder A 32 contains the collection cylinder 34 after collection, while protective cylinder B 33 contains the collection cylinder 34 for collection. Protective cylinder A 32 includes an upper sealing cylinder 321 and a lower sealing cylinder 322. An upper sealing ring 3211 is installed on the outer side of the bottom end of the upper sealing cylinder 321, and a lower sealing ring 3221 is installed on the outer side of the top end of the lower sealing cylinder 322. A [missing information - likely a type of sealing ring] is placed at the bottom of the lower sealing cylinder 322. The foam pad 3222 is rolled up, and the upper sealing ring 3211 and the lower sealing ring 3221 are fitted together. The collection cylinder 34 includes an air extraction cylinder 341 and a piston 344. A piston shaft 345 is installed at the top of the inside of the air extraction cylinder 341, and a piston 344 is installed at the center of the piston shaft 345. A piston handle 346 is installed at the top of the piston 344. The top of the piston handle 346 is L-shaped. An air inlet 342 is opened at the bottom of the air extraction cylinder 341. The bottom of the air inlet 342 is wrapped with a sealing sleeve 343, which facilitates the collection of coalbed methane and improves efficiency.

[0019] As a further improvement of this utility model, the pusher 41 includes a battery 411 and a servo motor 412. The servo motor 412 is mounted on the top of the battery 411, and a reducer 413 is mounted on the rear end of the servo motor 412. The rear end of the reducer 413 drives the ball screw 414, which is a limiter, to rotate. A screw spool 415 is threaded onto the center of the ball screw 414, and a pusher frame 416 is mounted on the top of the screw spool 415. The two ends of the pusher frame 416 are sleeved on the center of the slide rod 417. The front ends of the two sets of slide rods 417 are fixed to the rear wall of the fixing block 418. The pusher frame 416... The top of 16 is placed on the bottom side of the piston handle 346. The pusher frame 416 includes a crossbar 4161 and side blocks 4163. A fixing groove 4162 is opened at the center of the top of the crossbar 4161. Side blocks 4163 are fixed on both sides inside the fixing groove 4162. A rotating plate 4164 that can rotate is installed at the center of the two sets of side blocks 4163. The front side of the top of the crossbar 4161 is lower than the rear side, which is beneficial to the fact that the pusher frame can pull the piston handle to draw coalbed methane into the extraction cylinder when it moves. There is no need for manual extraction during the sampling process, which further reduces safety hazards.

[0020] Working principle: In use, the user first installs the collection box 1 on the mobile device via the mounting bracket 2. Then, after opening the outer cover 12, a set of unused B-type protective cylinders 33 can be taken out. After opening, the L-shaped top of the piston handle 346 in the collection cylinder 34 is placed downwards into the filling port 421 in the center of the positioning block 42. Then, the servo motor 412 is started and driven by the reducer 413 to rotate the ball screw 414. The rotation of the ball screw 414 drives the centrally mounted screw drum 415 and the pusher 416 to move towards the positioning block 42. When the crossbar 4161 moves to the piston... After the handle 346 is moved to the inner side by the rotation of the rotating plate 4164, the servo motor 412 is reversed to drive the ball screw 414 to rotate, which in turn drives the crossbar 4161 to move forward. When the rotating plate 4164 moves, it drives the piston handle 346 to push the piston 344 forward. When the piston 344 moves, it can draw the coalbed methane from the outside into the extraction cylinder 341. After collection, the sealing sleeve 343 can be put into the air inlet 342. Finally, the collection cylinder 34 is placed into the protective cylinder 32. The above is the complete working principle of this utility model.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A deep coalbed methane gas sampling device, comprising a sampling box (1) and a storage mechanism (3), wherein the storage mechanism (3) is installed on the left side inside the sampling box (1), and a sampling mechanism (4) is installed on the right side inside the sampling box (1), characterized in that: The storage mechanism (3) includes a placement rack (31), a protective cylinder A (32), a protective cylinder B (33), and a collection cylinder (34). Multiple sets of protective cylinders A (32) and B (33) are placed in the placement rack (31). A collection cylinder (34) is placed in both the protective cylinder A (32) and the protective cylinder B (33). The collection mechanism (4) includes a pusher (41) and a positioning block (42). A filling port (421) is opened in the positioning block (421). The collection cylinder (34) is filled in the filling port (421). The pusher (41) pushes the collection cylinder (34) to collect samples.

2. The deep coalbed gas sampling device of claim 1, wherein: The inside of the collection box (1) is equipped with a partition plate (11), and the front end of the collection box (1) is equipped with an outer cover (12). The outer cover (12) can be completely sealed when closed. A through opening (13) is provided on the right side of the inside of the collection box (1). Mounting brackets (2) are installed on both sides of the bottom end of the collection box (1). The collection box (1) is installed on the mobile device through the mounting brackets (2) for easy movement and collection.

3. The deep coalbed gas sampling device of claim 1, wherein: The protective cylinder A (32) and the protective cylinder B (33) have the same overall structure. The protective cylinder A (32) is higher than the protective cylinder B (33). The collection cylinder (34) after collection is placed inside the protective cylinder A (32), and the collection cylinder (34) for collection is placed inside the protective cylinder B (33).

4. The deep coalbed methane gas sampling device according to claim 1, characterized in that: The protective cylinder A (32) includes an upper sealing cylinder (321) and a lower sealing cylinder (322). An upper sealing ring (3211) is installed on the outer side of the bottom end of the upper sealing cylinder (321), and a lower sealing ring (3221) is installed on the outer side of the top end of the lower sealing cylinder (322). A rolled foam pad (3222) is placed at the bottom inside the lower sealing cylinder (322). The upper sealing ring (3211) and the lower sealing ring (3221) are fitted together.

5. The deep coalbed gas sampling device of claim 1, wherein: The collection cylinder (34) includes an air extraction cylinder (341) and a piston (344). A piston shaft (345) is installed at the top of the inside of the air extraction cylinder (341). A piston (344) is installed at the center of the piston shaft (345). A piston handle (346) is installed at the top of the piston (344). The top of the piston handle (346) is L-shaped. An air inlet (342) is opened at the bottom of the air extraction cylinder (341). A sealing sleeve (343) is wrapped around the bottom of the air inlet (342).

6. The deep coalbed gas sampling device of claim 1, wherein: The pusher (41) includes a battery (411) and a servo motor (412). The servo motor (412) is mounted on the top of the battery (411). A reducer (413) is mounted on the rear end of the servo motor (412). The rear end of the reducer (413) drives the ball screw (414) to rotate. A screw spool (415) is threaded onto the center of the ball screw (414). A pusher frame (416) is mounted on the top of the screw spool (415). The two ends of the pusher frame (416) are sleeved on the center of the slide rod (417). The front ends of the two sets of slide rods (417) are fixed to the rear wall of the fixing block (418). The top of the pusher frame (416) is placed on the bottom side of the piston handle (346).

7. The deep coalbed gas sampling device of claim 6, wherein: The pusher (416) includes a crossbar (4161) and side blocks (4163). A fixing groove (4162) is provided at the center of the top of the crossbar (4161). Side blocks (4163) are fixed on both sides inside the fixing groove (4162). A rotating plate (4164) that can rotate is installed at the center of the two sets of side blocks (4163). The front side of the top of the crossbar (4161) is lower than the rear side.

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