Sampling device for mine gas monitoring

Abstract

The utility model relates to the technical field of gas sampling, and particularly discloses a sampling device for mine gas monitoring, which comprises a collecting box and a sampling piece, the collecting box is provided with a storage groove for placing sampling pieces and a plurality of sampling cavities, sampling barrels capable of being taken out are arranged in the sampling cavities, filtering pieces are arranged at the bottoms of the sampling barrels, and the tops of the sampling cavities are connected with sealing plugs; the sampling piece comprises a positioning disc and a drill rod connected to one side of the positioning disc, a spiral blade is connected to the drill rod, and a driving piece for driving the drill rod to rotate is mounted on the positioning disc; the sampling piece is matched with the sampling cylinder, the sampled coal sample can be placed in the sampling cylinder and sealed in the sampling cavity, the gas content in the coal sample in the sampling cavity can be conveniently measured subsequently, the sampling piece and the sampling cylinder are conveniently and independently operated, a plurality of sampling points can be conveniently placed in the corresponding sampling cavity after being sampled, and the sampling efficiency is improved. Subsequent gas measurement operation is facilitated, and gas under the mine can be conveniently monitored according to the gas content of the multiple sampling points.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sampling, in particular to a sampling device for underground gas monitoring. Background Art

[0002] Gas sampling needs to be carried out regularly at fixed points in coal mines to monitor the gas content in the mine. By monitoring the gas concentration, gas exceeding the limit can be discovered in time to prevent gas explosions and suffocation accidents. Representative sampling points are selected according to the area and purpose to be monitored. The work of collecting coal samples from the core of the borehole to determine the gas content and composition in the coal seam. For sampling the gas content in the coal seam, the coal sample taken from the borehole is generally first put into a sealed can in time, and a part of it is taken out and the gas desorption amount in the coal sample is determined by a desorption instrument.

[0003] The coal mine gas sampling device disclosed in the existing patent announcement number CN217483955U includes a sampler body, a motor is arranged at the lower end of the sampler body, and a collecting tube is arranged at the rear end of the motor, a drill bit is rotatably connected to the bottom of the motor, and an interception net is arranged on the inner wall of the drill bit, a fixing frame is arranged on the outer wall of the drill bit, and a screw is threadedly connected to the fixing frame, a stabilizing ring is arranged on the outer wall of the drill bit, and a steel ball is rotatably connected to the outer wall of the stabilizing ring, a screw is rotatably connected to the upper end of the stabilizing ring, and a first limiting plate and a second limiting plate are arranged on the outer wall of the stabilizing ring, the second limiting plate and the first limiting plate are respectively located at the front and rear ends of the drill bit, and the second limiting plate and the first limiting plate are provided with bolts, and the second limiting plate and the first limiting plate are connected to the first limiting plate. There are slide grooves on the inner sides of the plates; when drilling, hold the sampler body by hand and insert the drill bit between the first limit plate and the second limit plate, then start the motor, the motor drives the drill bit to rotate and start drilling, as the drill bit enters the stabilizing ring and approaches the first limit plate and the second limit plate, the steel balls on the outer wall of the stabilizing ring are located in the slide groove and rotate, thereby increasing the stability of the drill bit. When the drilling work is completed, start the exhaust fan, and the coal mine gas in the coal mine layer enters the interior of the sampler body through the collecting pipe. When the coal mine gas enters the interior of the sampler body, it first contacts the condensing pipe for condensation, and then comes to the drying frame to contact and dry with the desiccant, and then passes through the exhaust fan and the gas collection port to enter the interior of the sampler body for collection.

[0004] The above sampling device can be used for gas sampling, but the sampling point is single, which is not convenient for sampling at multiple sampling points for subsequent analysis, and needs to be improved. In view of the above problems, a sampling device for underground gas monitoring is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a sampling device for underground gas monitoring to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A sampling device for underground gas monitoring, comprising a collection box and a sampling piece;

[0008] The collection box is provided with a storage slot for placing the sampling piece, and the collection box is also provided with a plurality of sampling cavities, in which a removable sampling cylinder is provided, a filter is provided at the bottom of the sampling cylinder, and a sealing plug is connected to the top of the sampling cavity;

[0009] The sampling component includes a positioning plate and a drill rod connected to one side of the positioning plate, a spiral blade is connected to the drill rod, a driving component for driving the drill rod to rotate is installed on the positioning plate, the positioning plate is connected to an operating frame on the side close to the driving component, and an insertion cavity for accommodating the positioning plate and the spiral blade is provided in the sampling tube.

[0010] In an optional solution: an air extraction pipe is installed on the side wall of the collection box, and the air extraction pipe is connected to the sampling chamber.

[0011] In an optional solution: the filter element includes a filter disc, and at least two groups of support rods for supporting the filter disc are provided at the bottom of the sampling chamber. The center of the bottom plate of the filter disc is connected to a fixing rod, and the fixing rod extends away from one end of the filter disc to the bottom of the sealing plug.

[0012] In an optional solution: the driving member includes a driving box installed on a side of the positioning plate away from the drill rod, a motor for driving the drill rod to rotate is installed in the driving box, and a storage component is also installed in the driving box.

[0013] In an optional solution: the operating frame includes a mounting frame and an extension frame connected to one side of the mounting frame.

[0014] In an optional solution: an opening groove for the extension frame to pass through is provided on one side of the sampling barrel, the opening groove is communicated with the insertion cavity, and the outer wall of the positioning plate is slidably matched with the inner wall of the sampling barrel.

[0015] In an optional solution: the sealing plug includes a disc and a plug body connected to the bottom of the disc, the outer wall of the plug body is threadedly matched with the inner wall of the top of the sampling chamber, the outer diameter of the disc is larger than the outer diameter of the plug body, and the top of the disc is connected to a handle.

[0016] In an optional solution: a box handle is rotatably connected to the collection box.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The sampling piece in the utility model cooperates with the sampling tube to sample the coal sample at the sampling point. The sampled coal sample can be placed in the sampling tube and sealed in the sampling cavity, which is convenient for measuring the gas content in the coal sample in the sampling cavity later. The sampling piece and the sampling tube are convenient for separate operation, which is conducive to placing the samples at multiple sampling points in the corresponding sampling cavity, which is convenient for subsequent gas measurement operations and convenient for monitoring the gas in the mine according to the gas content of multiple sampling points.

[0019] The utility model is convenient to carry as a whole, and is convenient to carry to a target sampling point for sampling operation. After sampling, it can be sealed in time to reduce gas leakage, which is convenient for subsequent gas measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a schematic diagram of the partial split structure of the utility model.

[0022] Figure 3 It is a structural schematic diagram of the sampling component in the utility model.

[0023] Figure 4 It is a schematic diagram of the structure of the coordinated use of the sampling member and the sampling tube in the utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the filter plate and the fixing rod in the utility model.

[0025] In the figure: 11, collecting box; 12, box handle; 13, sealing plug; 14, exhaust pipe; 15, sampling tube; 16, sampling piece; 17, storage slot; 18, positioning plate; 19, drill rod; 20, spiral blade; 21, drive box; 22, mounting frame; 23, extension frame; 24, opening slot; 25, filter plate; 26, fixing rod; 27, sampling chamber. DETAILED DESCRIPTION

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 5 , In this embodiment, a sampling device for underground gas monitoring includes a collection box 11 and a sampling member 16;

[0029] The collecting box 11 is provided with a storage slot 17 for placing the sampling member 16, and the collecting box 11 is also provided with a plurality of sampling cavities 27, in which a removable sampling cylinder 15 is provided, a filter is provided at the bottom of the sampling cylinder 15, and a sealing plug 13 is connected to the top of the sampling cavity 27;

[0030] The sampling member 16 includes a positioning plate 18 and a drill rod 19 connected to one side of the positioning plate 18, the drill rod 19 is connected to a spiral blade 20, a driving member for driving the drill rod 19 to rotate is installed on the positioning plate 18, the positioning plate 18 is connected to an operating frame on the side close to the driving member, and an insertion cavity for accommodating the positioning plate 18 and the spiral blade 20 is provided in the sampling tube 15;

[0031] In this embodiment, the mobile device is moved to the target position, the sampling member 16 is taken out, and the corresponding sampling cartridge 15 is taken out. Figure 4 As shown, the sampling tube 15 is placed outside the coal seam, and the positioning plate 18 is pressed to continuously go deeper into the cavity. At the same time, the driving member drives the drill rod 19 to rotate, and the coal sample can be placed in the gap between the spiral blades 20. Then the drill rod 19 and the spiral blades 20 are rotated out in opposite directions, and the sampling member 16 and the sampling tube 15 move synchronously. The coal sample is placed in the sampling tube 15, and the sampling tube 15 is placed in the sampling cavity 27. The coal sample is placed in the sampling cavity 27, and then the sealing plug 13 covers the top opening of the sampling cavity 27. Subsequently, a desorber can be used to determine the gas in the coal sample.

[0032] In another embodiment, an exhaust pipe 14 is installed on the side wall of the collecting box 11, and the exhaust pipe 14 is connected to the sampling chamber 27; the exhaust pipe 14 can be used for subsequent gas extraction.

[0033] In another embodiment, the filter element includes a filter disc 25, and at least two groups of support rods for supporting the filter disc 25 are provided at the bottom of the sampling cavity 27. The center of the bottom plate of the filter disc 25 is connected to a fixing rod 26, and the fixing rod 26 extends to the bottom of the sealing plug 13 away from one end of the filter disc 25; the sampling tube 15 is placed in the sampling cavity 27, and the coal sample can be placed on the top of the filter disc 25; the filter disc 25 can be taken out and cleaned through the fixing rod 26.

[0034] In another embodiment, the driving member includes a driving box 21 installed on the side of the positioning plate 18 away from the drill rod 19, and a motor for driving the drill rod 19 to rotate is installed in the driving box 21. A storage component is also installed in the driving box 21; the motor can drive the drill rod 19 to rotate, and the drill rod 19 cooperates with the spiral blade 20 to drill into the coal sample for sampling.

[0035] like Figure 3 As shown, in another embodiment, the operating frame includes a mounting frame 22 and an extension frame 23 connected to one side of the mounting frame 22 ; the sampling member 16 is conveniently operated through the mounting frame 22 or the extension frame 23 .

[0036] In another embodiment, an open groove 24 is provided on one side of the sampling barrel 15 for the extension frame 23 to pass through, and the open groove 24 is connected to the insertion cavity. The outer wall of the positioning plate 18 slides with the inner wall of the sampling barrel 15; the drill rod 19 and the spiral blade 20 are continuously inserted into the coal sample of the coal seam, the sampling barrel 15 can be placed outside the coal seam, the positioning plate 18 slides in the sampling barrel 15, and the extension frame 23 slides in the open groove 24.

[0037] In another embodiment, the sealing plug 13 includes a disc and a plug body connected to the bottom of the disc, the outer wall of the plug body is threadedly matched with the inner wall of the top of the sampling chamber 27, the outer diameter of the disc is larger than the outer diameter of the plug body, and the top of the disc is connected to a handle; the sealing plug 13 can be conveniently rotated as a whole through the handle, which is beneficial to the installation and use of the sealing plug 13.

[0038] In another embodiment, the collection box 11 is rotatably connected to a box handle 12; the box handle 12 facilitates the carrying device to move to a target location.

[0039] When the utility model is used, the mobile device is moved to the target position, the sampling member 16 is taken out, and the corresponding sampling cartridge 15 is taken out. Figure 4 As shown, the sampling tube 15 is placed outside the coal seam, and the positioning plate 18 is pressed to continuously go deeper into the cavity. At the same time, the driving member drives the drill rod 19 to rotate, and the drill rod 19 and the spiral blade 20 are continuously placed in the coal sample of the coal seam. The sampling tube 15 can be placed outside the coal seam, and the positioning plate 18 slides in the sampling tube 15, and the extension frame 23 slides in the opening groove 24. The coal sample can be placed in the gap of the spiral blade 20, and then the drill rod 19 and the spiral blade 20 are rotated out in the opposite direction, and the sampling member 16 and the sampling tube 15 move synchronously, and the coal sample is placed in the sampling tube 15, and the sampling tube 15 is placed in the sampling cavity 27, and the coal sample is placed in the sampling cavity 27. Then the sealing plug 13 covers the top opening of the sampling cavity 27, and the desorber can be used to measure the gas in the coal sample later.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A sampling device for underground gas monitoring, comprising a collecting box (11) and a sampling member (16); Features: The collecting box (11) is provided with a storage slot (17) for placing the sampling member (16), and the collecting box (11) is also provided with a plurality of sampling cavities (27), wherein a removable sampling cylinder (15) is provided in the sampling cavity (27), a filter is provided at the bottom of the sampling cylinder (15), and a sealing plug (13) is connected to the top of the sampling cavity (27); The sampling member (16) comprises a positioning plate (18) and a drill rod (19) connected to one side of the positioning plate (18); a spiral blade (20) is connected to the drill rod (19); a driving member for driving the drill rod (19) to rotate is installed on the positioning plate (18); a side of the positioning plate (18) close to the driving member is connected to an operating frame; and an insertion cavity for accommodating the positioning plate (18) and the spiral blade (20) is provided in the sampling tube (15).

2. A sampling device for underground gas monitoring according to claim 1, characterized in that: An air extraction pipe (14) is installed on the side wall of the collection box (11), and the air extraction pipe (14) is connected to the sampling chamber (27).

3. The sampling device for underground gas monitoring according to claim 1 is characterized in that: The filter element comprises a filter disc (25), at least two groups of support rods for supporting the filter disc (25) are provided at the bottom of the sampling chamber (27), the center of the bottom plate of the filter disc (25) is connected to a fixing rod (26), and the fixing rod (26) extends away from one end of the filter disc (25) to the bottom of the sealing plug (13).

4. The sampling device for underground gas monitoring according to claim 1 is characterized in that: The driving member comprises a driving box (21) installed on a side of the positioning plate (18) away from the drill rod (19), a motor for driving the drill rod (19) to rotate is installed in the driving box (21), and a power storage component is also installed in the driving box (21).

5. The sampling device for underground gas monitoring according to claim 1 is characterized in that: The operating frame comprises a mounting frame (22) and an extension frame (23) connected to one side of the mounting frame (22).

6. A sampling device for underground gas monitoring according to claim 5, characterized in that: An opening groove (24) for the extension frame (23) to pass through is provided on one side of the sampling tube (15); the opening groove (24) is communicated with the insertion cavity; and the outer wall of the positioning plate (18) is slidably matched with the inner wall of the sampling tube (15).

7. The sampling device for underground gas monitoring according to claim 1 is characterized in that: The sealing plug (13) comprises a disk and a plug body connected to the bottom of the disk, the outer wall of the plug body is threadedly matched with the inner wall of the top of the sampling chamber (27), the outer diameter of the disk is larger than the outer diameter of the plug body, and the top of the disk is connected to a handle.

8. The sampling device for underground gas monitoring according to claim 1 is characterized in that: The collecting box (11) is rotatably connected to a box handle (12).

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