Portable downhole mine gas sampler

Abstract

The utility model discloses a portable underground mine gas sampler belongs to gas collection technical field, including handle, handle one side fixedly connected with protection subassembly, and the inside fixedly connected with collection mechanism of protection subassembly, it through collection mechanism cooperation leak protection subassembly and pneumatic control subassembly, can realize single -pass time -sharing sampling or multichannel simultaneous sampling, can complete the gas collection operation of different point, convenient operation, greatly shorten the sampling time, improve sampling efficiency, can prevent the gas that collected simultaneously effectively leaks or outside gas mixes, guarantee the purity and concentration accuracy of sample, through setting handle, make the sampler convenient to be carried and remove, alleviate the labor intensity, through the protection shell cooperation dust screen, can effectively resist the collision, extrusion under the well, can effectively block dust into the equipment inside, protect internal component safety, prolong the service life of equipment, ensure that equipment can stable operation in the well bad environment.

Description

Technical Field

[0001] This utility model relates to the field of gas sampling technology, and more specifically, to a portable underground mining gas sampler. Background Technology

[0002] Underground mining operations are complex and unique, and gas safety monitoring is one of the core aspects of ensuring mine production safety. Underground spaces are enclosed and ventilation is limited, making it easy for toxic, harmful, flammable, and explosive gases such as methane, carbon monoxide, and hydrogen sulfide to accumulate. Changes in the concentration of these gases directly affect the safety of workers and the production order of the mine. As a preliminary step in gas monitoring, gas sampling has a decisive impact on subsequent gas composition analysis, concentration judgment, and safety early warning due to its accuracy, timeliness, and convenience.

[0003] Existing underground mining gas sampling equipment has gradually revealed many shortcomings in practical applications. In terms of portability, traditional samplers are mostly fixed or bulky mobile structures, which are heavy and lack user-friendly carrying designs. When operators move through narrow underground tunnels and uneven working faces, carrying and operating them is extremely inconvenient, which not only increases the labor intensity but may also cause structural damage due to equipment collisions.

[0004] In terms of sampling efficiency and flexibility, most sampling devices only have a single sampling channel, which can only collect gas samples from one point at a time. If multiple sampling points are required for gases in different areas and at different depths, the sampling device must be repeatedly disassembled and reassembled, making the operation process cumbersome and time-consuming, which is difficult to meet the needs of multi-point sampling. In addition, some samplers lack an effective sealing and leak-proof structure for the gas flow channel, which can easily lead to gas leakage or the mixing of external gases during the sampling process, resulting in distorted sample concentrations and affecting subsequent gas analysis results, which may lead to the risk of misjudgment.

[0005] Therefore, a portable underground mining gas sampler is proposed to address the above problems. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] To address the problems existing in the prior art, the purpose of this utility model is to provide a portable underground mining gas sampler that can increase the number of samples collected and ensure the purity of the collected gas.

[0008] 2. Technical Solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] A portable underground mining gas sampler includes a handle, a protective component fixedly connected to one side of the handle, a collection mechanism fixedly connected inside the protective component, the collection mechanism including a connecting plate, a plurality of collection tubes fixedly connected to the inner surface of the connecting plate, a leak-proof component fixedly connected to the inner surface of each of the plurality of collection tubes, and a gas control component fixedly connected to the lower end of the connecting plate.

[0011] Furthermore, the leak-proof component includes a flow tube, a connecting ring fixedly connected to the inner surface of the flow tube, a plurality of connecting strips fixedly connected to the inner surface of the connecting ring, a retaining ring fixedly connected to the inner surface of the plurality of connecting strips, a spring fixedly connected to the lower end of the retaining ring, a sealing plate fixedly connected to the lower end of the spring, and a hollow tube fixedly connected to the upper end of the sealing plate.

[0012] Furthermore, the pneumatic control component includes a negative pressure pump, the output end of which is fixedly connected to an air extraction pipe, the outer surface of which is fixedly connected to and connected to a switching disc, the inner surface of which is fixedly connected to and connected to multiple connecting pipes, the outer surfaces of which are each equipped with a solenoid valve, and the inner surfaces of which are each fixedly connected to and connected to a flexible hose.

[0013] Furthermore, the protective component includes a protective housing, a display screen integrated on one side of the protective housing, multiple buttons integrated on one side of the protective housing, and a dustproof mesh fixedly connected to the inner surface of the protective housing.

[0014] Furthermore, the handle is fixedly installed on one side of the protective shell, the negative pressure pump is fixedly installed on the lower end of the connecting plate, and the connecting plate is fixedly installed on the inner wall of the protective shell.

[0015] Furthermore, the outer surfaces of the multiple flexible tubes are respectively fixedly connected and communicate with the inner surfaces of the multiple collection tubes, and the flow tube is fixedly installed on the inner wall of the collection tube.

[0016] 3. Beneficial effects

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] (1) This solution, through the collection mechanism in conjunction with the leak prevention component and the gas control component, can realize single-channel time-sharing sampling or multi-channel simultaneous sampling, and can complete gas collection operations at different locations. It is easy to operate, greatly shortens the sampling time, and improves the sampling efficiency. At the same time, it can effectively prevent the collected gas from leaking or the external gas from mixing in, ensuring the purity and concentration accuracy of the sample.

[0019] (2) By setting a handle, the sampler can be easily carried and moved by the operators, reducing the labor intensity; by using a protective shell and a dustproof net, it can effectively resist underground collisions and squeezing, and at the same time effectively block dust from entering the equipment, protect the internal components, extend the service life of the equipment, and ensure that the equipment can operate stably in the harsh underground environment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the data acquisition mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the leak-proof component of this utility model;

[0023] Figure 4 This is a schematic diagram of the pneumatic control component of this utility model;

[0024] Figure 5 This is a schematic diagram of the protective component of this utility model.

[0025] Explanation of the labels in the diagram:

[0026] 1. Handle; 2. Protective components; 21. Protective housing; 22. Display screen; 23. Button; 24. Dustproof net; 3. Data collection mechanism; 31. Connecting plate; 32. Data collection tube; 33. Leakage prevention components; 331. Flow tube; 332. Connecting ring; 333. Connecting strip; 334. Retaining ring; 335. Spring; 336. Sealing plate; 337. Hollow tube; 34. Pneumatic control components; 341. Negative pressure pump; 342. Air extraction tube; 343. Switching panel; 344. Connecting tube; 345. Solenoid valve; 346. Hoses. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example 1:

[0031] Please see Figure 1 - Figure 4 A portable underground mining gas sampler includes a handle 1, a protective component 2 fixedly connected to one side of the handle 1, a collection mechanism 3 fixedly connected inside the protective component 2, the collection mechanism 3 includes a connecting plate 31, a plurality of collection tubes 32 fixedly connected to the inner surface of the connecting plate 31, a leak-proof component 33 fixedly connected to the inner surface of each of the plurality of collection tubes 32, and a gas control component 34 fixedly connected to the lower end of the connecting plate 31.

[0032] The leak-proof component 33 includes a flow tube 331, which is fixedly installed on the inner wall of the collection tube 32. A connecting ring 332 is fixedly connected to the inner surface of the flow tube 331. Multiple connecting strips 333 are fixedly connected to the inner surface of the connecting ring 332. A retaining ring 334 is fixedly connected to the inner surface of the multiple connecting strips 333. A spring 335 is fixedly connected to the lower end of the retaining ring 334. A sealing plate 336 is fixedly connected to the lower end of the spring 335. A hollow tube 337 is fixedly connected to the upper end of the sealing plate 336.

[0033] The sealing plate 336 is made of rubber, which has good elasticity and sealing properties. Its diameter is larger than the inner diameter of the flow pipe 331 and smaller than the outer diameter of the flow pipe 331. Under the action of the spring 335, it can be tightly attached to the lower end of the flow pipe 331 to achieve a seal.

[0034] The pneumatic control component 34 includes a negative pressure pump 341, which is fixedly installed at the lower end of the connecting plate 31. The output end of the negative pressure pump 341 is fixedly connected to a suction pipe 342. The outer surface of the suction pipe 342 is fixedly connected to and communicates with a switching disk 343. The inner surface of the switching disk 343 is fixedly connected to and communicates with multiple connecting pipes 344. The outer surface of each of the multiple connecting pipes 344 is provided with a solenoid valve 345. The inner surface of each of the multiple connecting pipes 344 is fixedly connected to and communicates with a flexible hose 346. The outer surface of each of the multiple flexible hoses 346 is fixedly connected to and communicates with the inner surface of each of the multiple collection pipes 32.

[0035] The negative pressure pump 341 is a miniature DC negative pressure pump, which is small in size, light in weight and low in power consumption, making it suitable for use in portable devices. It is fixed to the lower end of the connecting plate 31 by bolts and is used to provide the negative pressure required for gas collection.

[0036] The solenoid valve 345 is a miniature two-position two-way solenoid valve, which is installed on the outer surface of the connecting pipe 344 to control the on / off state of the corresponding connecting pipe 344 and realize the selection of the sampling channel.

[0037] This solution starts the sampler by pressing the power button. The display screen 22 shows the sampler's standby status and various initial parameters. By pressing the channel switching button and parameter setting button, the corresponding sampling tube 32 can be selected, and parameters such as sampling time can be set. After the parameters are set, the sampling start button is pressed to start sampling. After the controller receives the sampling start command, it immediately controls the negative pressure pump 341 to start. The negative pressure pump 341 works to generate negative pressure, and at the same time controls the solenoid valve 345 corresponding to the selected sampling channel to open, while the solenoid valve 345 of the unselected channel remains closed.

[0038] The gas inside the corresponding collection tube 32 will be extracted by the negative pressure pump 341. After the original gas inside the collection tube 32 is extracted, the external air pressure is higher than the internal air pressure of the collection tube 32. The sealing plate 336 will move downward under the combined action of the pressure and the negative pressure pump 341. At this time, the spring 335 will extend. Since the sealing plate 336 is away from the bottom of the flow tube 331, the gas will enter from the gap between the connecting ring 332, the connecting strip 333 and the retaining ring 334, and enter the collection tube 32 along the flow tube 331. After the gas enters the collection tube 32, the negative pressure pump 341 can continue to be turned on for a period of time to allow the gas at the sampling point to blow out the gas remaining in the collection tube 32, ensuring the accuracy of the sampled gas.

[0039] Then, the negative pressure pump 341 and the solenoid valve 345 corresponding to the sampling channel are closed, and the gas in the collection tube 32 is no longer drawn in, so that the gas can remain in the collection tube 32. As the gas pressure in the collection tube 32 gradually increases, the sealing plate 336 will be reattached to the bottom of the flow tube 331 under the combined action of the spring 335 and the gas pressure, so that the lower half of the collection tube 32 becomes a closed space, effectively preventing the collected gas from leaking or the outside gas from mixing in, and ensuring the accuracy of the sample.

[0040] Please see Figure 1 and Figure 5 The protective component 2 includes a protective shell 21, a connecting plate 31 fixedly installed on the inner wall of the protective shell 21, a handle 1 fixedly installed on one side of the protective shell 21, a display screen 22 integrated on one side of the protective shell 21, multiple buttons 23 integrated on one side of the protective shell 21, and a dustproof net 24 fixedly connected to the inner surface of the protective shell 21.

[0041] The display screen 22 is integrated on the front of the protective housing 21. It uses an industrial-grade LCD screen with high brightness and wide viewing angle, allowing operators to clearly see the displayed content even in dimly lit underground environments. It is mainly used to display parameters such as sampling channel number, sampling time, working status of negative pressure pump 341, and on / off status of solenoid valve 345. The button 23 is also integrated on the front of the protective housing 21, located below the display screen 22. It uses waterproof and dustproof buttons, including a power button, sampling start button, channel switching button, and parameter setting button, which are used to realize operations such as powering on / off, sampling control, channel selection, and parameter adjustment. The dustproof net 24 is fixedly connected to the ventilation opening of the protective housing 21. It is made of nylon and can effectively prevent underground dust from entering the equipment.

[0042] It should be noted that this utility model uses a rechargeable lithium battery pack for power supply. The lithium battery pack has a capacity of 12V / 5Ah and is fixedly installed at the bottom of the inner cavity of the protective shell 21. The lithium battery pack is connected to the controller, negative pressure pump 341, display screen 22, solenoid valve 345 and other electrical components through power cords to provide them with working power. The device is also equipped with a charging interface to facilitate charging of the lithium battery pack. By pressing the button 23, a command is sent to the controller, and the controller controls the corresponding components to perform gas sampling according to the command. The display screen 22 is electrically connected to the controller, and the controller transmits the collected equipment operating parameters, such as the speed of the negative pressure pump 341, the status of the solenoid valve 345, and the sampling time, to the display screen 22 for display, so that the operator can monitor the equipment status in real time.

[0043] The controller uses a microcontroller as the core control unit, model STM32F103, which features small size, low power consumption and strong processing power, and can realize coordinated control of various electrical components.

[0044] It should be noted that the specific installation methods, circuit connection methods, and control methods of the negative pressure pump 341, display screen 22, and solenoid valve 345 in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0045] Working principle:

[0046] After the operator arrives at the sampling location underground with this sampler, they first start the sampler by pressing the power button on the protective casing 21. The display screen 22 shows the sampler's standby status and various initial parameters. According to the sampling requirements, the operator selects the corresponding sampling tube 32 by pressing the channel switching button and the parameter setting button, and sets parameters such as the sampling time. After the parameters are set, the operator presses the sampling start button to start sampling. After receiving the sampling start command, the controller immediately controls the negative pressure pump 341 to start. The negative pressure pump 341 generates negative pressure and simultaneously controls the solenoid valve 345 corresponding to the selected sampling channel to open, while the solenoid valve 345 of the unselected channel remains closed.

[0047] The gas inside the corresponding collection tube 32 will be extracted by the negative pressure pump 341. After the original gas inside the collection tube 32 is extracted, the external air pressure is higher than the internal air pressure of the collection tube 32. The sealing plate 336 will move downward under the combined action of the pressure and the negative pressure pump 341. At this time, the spring 335 will extend. Since the sealing plate 336 is away from the bottom of the flow tube 331, the gas will enter from the gap between the connecting ring 332, the connecting strip 333 and the retaining ring 334, and enter the collection tube 32 along the flow tube 331. After the gas enters the collection tube 32, the negative pressure pump 341 can continue to be turned on for a period of time to allow the gas at the sampling point to blow out the gas remaining in the collection tube 32, ensuring the accuracy of the sampled gas.

[0048] Then, the negative pressure pump 341 and the solenoid valve 345 corresponding to the sampling channel are closed, and the gas in the collection tube 32 is no longer drawn in, so that the gas can remain in the collection tube 32. As the gas pressure in the collection tube 32 gradually increases, the sealing plate 336 will be reattached to the bottom of the flow tube 331 under the combined action of the spring 335 and the gas pressure, so that the lower half of the collection tube 32 becomes a closed space, effectively preventing the collected gas from leaking or the outside gas from mixing in, and ensuring the accuracy of the sample.

[0049] During the sampling process, the display screen 22 shows the current sampling channel number, the working status of the negative pressure pump 341, the sampling time, and other parameters in real time. The operator can keep track of the sampling progress by observing the display screen 22. If it is necessary to collect gas samples from multiple points, the operator can select different sampling channels in sequence through the channel switching button and repeat the above sampling process to achieve multi-point time-sharing sampling. If it is necessary to collect multiple gas samples from the same point at the same time, multiple channels can be selected for simultaneous sampling. The controller will open the solenoid valves 345 corresponding to the four channels at the same time to achieve parallel sampling of multiple channels. After the sampling is completed, press the power button to turn off the equipment.

[0050] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A portable underground mining gas sampler, comprising a handle (1), characterized in that: A protective component (2) is fixedly connected to one side of the handle (1). A collection mechanism (3) is fixedly connected inside the protective component (2). The collection mechanism (3) includes a connecting plate (31). Multiple collection tubes (32) are fixedly connected to the inner surface of the connecting plate (31). A leak-proof component (33) is fixedly connected to the inner surface of each of the multiple collection tubes (32). A pneumatic control component (34) is fixedly connected to the lower end of the connecting plate (31).

2. The portable underground mining gas sampler according to claim 1, characterized in that: The leak-proof component (33) includes a flow pipe (331), a connecting ring (332) is fixedly connected to the inner surface of the flow pipe (331), a plurality of connecting strips (333) are fixedly connected to the inner surface of the connecting ring (332), a retaining ring (334) is fixedly connected to the inner surface of the plurality of connecting strips (333), a spring (335) is fixedly connected to the lower end of the retaining ring (334), a sealing plate (336) is fixedly connected to the lower end of the spring (335), and a hollow tube (337) is fixedly connected to the upper end of the sealing plate (336).

3. A portable underground mining gas sampler according to claim 2, characterized in that: The pneumatic control component (34) includes a negative pressure pump (341), the output end of which is fixedly connected to an air extraction pipe (342). The outer surface of the air extraction pipe (342) is fixedly connected to and connected to a switching disk (343). The inner surface of the switching disk (343) is fixedly connected to and connected to multiple connecting pipes (344). The outer surface of each of the multiple connecting pipes (344) is provided with a solenoid valve (345), and the inner surface of each of the multiple connecting pipes (344) is fixedly connected to and connected to a flexible hose (346).

4. A portable underground mining gas sampler according to claim 3, characterized in that: The protective component (2) includes a protective shell (21), a display screen (22) is integrated on one side of the protective shell (21), a plurality of buttons (23) are integrated on one side of the protective shell (21), and a dustproof mesh (24) is fixedly connected to the inner surface of the protective shell (21).

5. A portable underground mining gas sampler according to claim 4, characterized in that: The handle (1) is fixedly installed on one side of the protective shell (21), the negative pressure pump (341) is fixedly installed on the lower end of the connecting plate (31), and the connecting plate (31) is fixedly installed on the inner wall of the protective shell (21).

6. A portable underground mining gas sampler according to claim 3, characterized in that: The outer surfaces of the multiple hoses (346) are fixedly connected and communicate with the inner surfaces of the multiple collection tubes (32), and the flow tube (331) is fixedly installed on the inner wall of the collection tube (32).

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