Mine explosion-proof dust sampling device

Abstract

A mine explosion-proof dust sampling device belongs to the technical field of dust sampling and comprises a shell, a battery and an air pump are arranged in the shell, the air pump is connected with an air inlet pipe and an air outlet pipe, and the ends, away from the air pump, of the air inlet pipe and the air outlet pipe transversely penetrate through the shell and extend outwards. A hollow filter membrane installation assembly is detachably installed at the position, extending out of a pipe opening of the shell, of the air inlet pipe and comprises a fixing cylinder fixedly arranged at the position of the pipe opening of the air inlet pipe, a connecting part is fixedly arranged at the end of the fixing cylinder, an air inlet cylinder is inserted into the connecting part, and an air inlet cover is detachably installed on the connecting part. One end of the air inlet cylinder extends out of the connecting part and is arranged in the air inlet cover, filter membrane mounting positions are arranged between the air inlet cover and the end of the air inlet cylinder and between the end of the air inlet cylinder and the connecting part, filter membranes are convenient to replace, and different filter membrane mounting positions can be selected according to actual environments due to the arrangement of the multiple filter membrane mounting positions. The influence of the external environment (especially rainy days) on filter membrane sampling is reduced, and the sampling precision is ensured.

Description

Technical Field

[0001] This utility model relates to the field of dust sampling technology, and in particular to a mine explosion-proof dust sampling device. Background Technology

[0002] Sampling of explosion-proof dust in mines is an important part of mine safety production and occupational health management. It is used to determine the concentration level of dust in the air in the mine workplace, to determine whether it exceeds the prescribed occupational exposure limits, and to determine the content of various chemical components in the dust, especially the content of free silica, to assess the degree of harm of dust to human health and provide a basis for taking appropriate dust prevention measures.

[0003] Explosion-proof dust samplers are commonly used for sampling explosion-proof dust in mines. These samplers collect dust particles through a filter membrane. Existing explosion-proof dust samplers (such as CN211179128U) install the filter membrane inside the sampler housing and fix it with a connecting flange. This allows the filter membrane to be connected to the inlet and outlet pipes. After the air pump is started, as the gas passes through the inlet pipe, filter membrane, and outlet pipe in sequence, the filter membrane can collect the dust carried by the gas for subsequent testing.

[0004] Existing explosion-proof dust samplers require opening the entire outer shell of the sampler and adjusting the connecting flange to remove and install the filter membrane. The entire operation is complicated and inconvenient to use. If the filter membrane is installed at the inlet / outlet of the air inlet / exhaust pipe outside the shell, it can improve the ease of installation. However, the filter membrane installed at the inlet will be exposed to the external environment and susceptible to the influence of rainwater and other water bodies, resulting in inaccurate sampling results and affecting the accuracy of the test. Utility Model Content

[0005] To address the technical problems of existing explosion-proof dust samplers, such as complex filter membrane installation and disassembly, inconvenience in use, and susceptibility to water contamination at the pipe inlet, this invention provides a mine explosion-proof dust sampling device.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model provides a mine explosion-proof dust sampling device, comprising: a housing, inside which a battery and an air pump are installed. The air pump is connected to an inlet pipe and an outlet pipe. The ends of the inlet and outlet pipes furthest from the air pump both extend laterally through the housing and outwards. The air pump generates suction, drawing in dust-laden air through the inlet pipe and discharging it through the outlet pipe, forming a stable airflow channel to ensure the continuity and stability of dust sampling. The lateral penetration through the housing prevents water from entering during rainy weather. A hollow filter membrane mounting assembly is detachably installed at the outlet of the inlet pipe extending out of the housing. The filter membrane mounting assembly includes components fixedly mounted on the inlet pipe. The fixed cylinder at the inlet has a connecting part fixed at its end. An air inlet cylinder is inserted into the connecting part, and an air inlet cover is detachably installed on the connecting part. One end of the air inlet cylinder extends outward from the connecting part and is placed inside the air inlet cover. There are filter membrane installation positions between the air inlet cover and the end of the air inlet cylinder, and between the end of the air inlet cylinder and the connecting part, which facilitates filter membrane replacement and improves work efficiency. The setting of multiple filter membrane installation positions allows for the selection of different filter membrane installation positions according to the actual environment, so as to reduce the impact of the external environment (especially rainy days) on filter membrane sampling and ensure sampling accuracy. At the same time, all components are tightly connected to prevent air leakage from affecting the sampling effect.

[0008] Preferably, one end of the air inlet extends outward to form a connecting part and is fixedly provided with a flange. A filter membrane mounting position is provided between the flange and the air inlet cover. The flange increases the contact area, which can further stabilize the filter membrane and prevent it from shifting under the impact of airflow, thus ensuring the dust filtration effect. At the same time, it facilitates the installation and removal of the filter membrane and improves the ease of operation.

[0009] Preferably, the top of the housing is detachably equipped with a rain shield to prevent rainwater from entering the sampling device in rainy or humid environments, protecting critical internal components and the filter membrane from moisture, and ensuring the accuracy of sampling data and the normal operation of the equipment.

[0010] Preferably, the rainproof assembly includes a storage box installed on the top of the housing. The storage box has a sliding groove, and a rainproof plate is slidably disposed in the sliding groove. The rainproof plate is located above the filter membrane mounting assembly. A push rod is fixedly connected to the rainproof plate, and one end of the push rod extends outward from the storage box. The storage box stores the rainproof plate, saving space. The sliding groove, together with the push rod, makes the unfolding and retraction of the rainproof plate simple and flexible. When used with the filter membrane mounting assembly, it can effectively prevent rainwater from interfering with the filter membrane sampling.

[0011] Preferably, the bottom of the housing has a bracket hole, which makes it easy to fix the device on various brackets to ensure the stability of the sampling position. The bottom of the housing is also equipped with a buffer pad to reduce the damage to the internal components caused by vibration during placement. The upper part of the housing is rotatably connected to a handle, which makes it easy to carry and move the device to adapt to different sampling locations.

[0012] Preferably, the air inlet pipe is equipped with a flow regulator, which can precisely adjust the air inlet flow according to the actual sampling needs, ensuring that representative dust samples can be collected under different working conditions, while optimizing the working status of the air pump and extending the service life of the equipment.

[0013] Preferably, a filter bag groove is provided on the outer wall of the housing. The filter bag groove is used to temporarily store the filter bag of the sampling filter membrane to prevent the sampling filter membrane and the filter bag from being mixed up and affecting the subsequent results. A control mechanism is also fixed on the outer wall of the housing. The control mechanism is connected to the air pump and the flow regulator.

[0014] As can be seen from the above technical solutions, the advantages of this utility model are:

[0015] 1. A filter membrane installation assembly is installed at the end of the air inlet pipe. Filter membrane installation positions are provided between the air inlet cover and the end of the air inlet cylinder, and between the end of the air inlet cylinder and the connecting part. The filter membrane can be quickly replaced by removing and installing the air inlet cover and air inlet cylinder, which is convenient and improves work efficiency. The multiple filter membrane installation positions allow for selection of different filter membrane installation locations according to the actual environment, reducing the impact of the external environment (especially rainy days) on filter membrane sampling and ensuring sampling accuracy. At the same time, the tight connection of each component prevents air leakage from affecting the sampling effect.

[0016] 2. A rainproof assembly is detachably installed on the top of the housing. The rainproof assembly has a retractable rainproof plate. The rainproof plate, together with the filter membrane installation assembly, can effectively prevent rainwater from interfering with the filter membrane sampling and ensure the accuracy of the sampling results. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the mine explosion-proof dust sampling device according to one or more embodiments of the present invention;

[0019] Figure 2 This is an exploded structural diagram of the mine explosion-proof dust sampling device according to one or more embodiments of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the filter membrane mounting assembly according to one or more embodiments of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of a rainproof component according to one or more embodiments of the present invention;

[0022] Figure 5 This is a cross-sectional structural schematic diagram of the mine explosion-proof dust sampling device according to one or more embodiments of the present invention;

[0023] The components represented by the various reference numerals in the diagram are:

[0024] 1. Housing; 101. Support hole; 102. Filter membrane bag groove; 2. Buffer pad; 3. Storage box; 301. Slide groove; 4. Rain guard; 401. Push rod; 5. Air inlet cover; 501. Air inlet cylinder; 502. Fixing cylinder; 6. Air inlet pipe; 7. Flow meter; 8. Time display; 9. Handle; 901. Connecting shaft; 10. Flow regulator; 11. Air pump; 12. Air outlet pipe; 13. Sampling button. Detailed Implementation

[0025] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0026] In a typical embodiment of this utility model, such as Figures 1-5 As shown, a mine explosion-proof dust sampling device is proposed, including: a housing 1, an air inlet pipe 6, an air pump 11, an air outlet pipe 12, and a control mechanism. A rainproof component is detachably installed on the top of the housing 1. The housing 1 is hollow inside, and the air pump 11 is installed inside. The air inlet of the air pump 11 is fixedly connected to the air inlet pipe 6, and the air outlet of the air pump 11 is fixedly connected to the air outlet pipe 12. The end of the air inlet pipe 6 away from the air pump 11 passes through the side wall of the housing 1 and extends laterally outward. This laterally arranged configuration allows for the placement of... When water enters, the end of the air outlet pipe 12 away from the air pump 11 also passes through the side wall of the housing 1 and extends outward. The control mechanism is electrically connected to the air pump 11 to control the operation of the air pump 11. The gas from the external environment flows through the air inlet pipe 6, the air pump 11, and the air outlet pipe 12 in sequence. A filter membrane mounting assembly is detachably installed at the end of the air inlet pipe 6 that extends out of the housing 1. The filter membrane is detachably installed in the filter membrane mounting assembly to protect the filter membrane and prevent the water from affecting the filter membrane.

[0027] like Figure 3As shown, the filter membrane mounting assembly includes an air inlet cover 5, an air inlet cylinder 501, and a fixing cylinder 502. All three components—air inlet cover 5, air inlet cylinder 501, and fixing cylinder 502—are hollow structures. One end of the air inlet cylinder 501 is fixedly provided with a flange, which is perpendicular to the axis of the air inlet cylinder 501. The flange of the air inlet cylinder 501 is placed inside the air inlet cover 5 and is used to cooperate with the air inlet cover 5 to achieve compression and limiting of the filter membrane. One end of the fixing cylinder 502 is fixedly connected to the inlet of the air inlet pipe 6 by welding, and the other end of the fixing cylinder 502 is fixedly provided with a connecting part for connecting... The inner diameter of the part is larger than the pipe diameter of the fixed cylinder 502, and the inner diameter of the connecting part is the same as the outer diameter of the air inlet cylinder 501, so as to be used for the insertion of the air inlet cylinder 501. The pipe diameter of the air inlet cylinder 501 is larger than that of the fixed cylinder 502, and the outer diameter of the connecting part is the same as the outer diameter of the flange of the air inlet cylinder 501. The end of the air inlet cylinder 501 with the flange extends outward from the connecting part and is placed inside the air inlet cover 5. The outer wall of the connecting part is provided with external threads, and the air inlet cover 5 is provided with internal threads, so as to realize the quick connection between the air inlet cover 5 and the connecting part by means of threaded connection, and to restrict the position of the air inlet cylinder 501 by means of the air inlet cover 5.

[0028] In this embodiment, the filter membrane mounting assembly has two filter membrane mounting positions: one located between the flange of the air inlet cylinder 501 and the air inlet cover 5, and the other located between the end of the air inlet cylinder 501 and the end of the fixed cylinder 502. When there is no rain or water in the outside, the filter membrane is installed between the flange of the air inlet cylinder 501 and the air inlet cover 5. The fit between the flange of the air inlet cylinder 501 and the air inlet cover 5 is used to press and limit the filter membrane. The filter membrane can be installed and removed simply by removing the air inlet cover 5, which is simple to operate. When there is rain or water in the outside, the filter membrane is installed between the end of the air inlet cylinder 501 and the end of the fixed cylinder 502. The fit between the end of the air inlet cylinder 501 and the inner wall of the connection is used to limit the installation of the filter membrane. The filter membrane can be protected by the air inlet cover 5, the air inlet cylinder 501 and the connection to avoid the influence of water. The installation and removal of the filter membrane only requires removing the air inlet cover 5 and pulling out the air inlet cylinder 501, which is simple and convenient to operate.

[0029] A flow regulator 10 is also installed on the intake pipe 6. The flow regulator 10 is located inside the housing 1 and is electrically connected to the control mechanism. It can adjust the intake flow to meet different needs.

[0030] To further reduce the impact of water on the filter membrane, a water-blocking component is also installed on the top of the housing 1, such as... Figure 2 and Figure 4As shown, the water-blocking assembly includes a storage box 3 and a rain shield 4. The storage box 3 is detachably installed on the top of the housing 1 by means of bolt connection. The storage box 3 has several sliding grooves 301, and a rain shield 4 is slidably installed in each sliding groove 301. When it rains, the rain shield 4 can be pulled out from the storage box 3 to protect the device.

[0031] Specifically, in this embodiment, two sliding grooves 301 are provided on the side wall of the storage box 3, one of which is located above the filter membrane installation assembly and the other is located above the control mechanism, so as to shield the filter membrane installation assembly and the control mechanism respectively, so as to prevent water from contacting the filter membrane installation assembly and the control mechanism. Each rain shield 4 is fixedly provided with a push rod 401, one end of the push rod 401 extends outward from the storage box 3, so as to push the rain shield 4 to move.

[0032] like Figure 5 As shown, the bottom of the housing 1 has a bracket hole 101, which is a stepped hole structure for quick connection with the bracket. The entire sampling device can be made using the bracket to adapt to sampling needs at different heights. A buffer pad 2 is also fixedly installed at the bottom of the housing 1 to provide cushioning. A handle 9 is also hinged to the upper part of the housing 1. The handle 9 is rotatably connected to the housing 1 through a connecting shaft 901 to facilitate the overall movement of the sampling device. A filter bag groove 102 is also provided on one outer wall of the housing 1 to temporarily store the filter bag corresponding to the sampling filter membrane, preventing the sampling filter membrane and filter bag from being mixed up and affecting subsequent results.

[0033] The control mechanism is fixedly installed on the outer wall of the housing 1. The control mechanism includes a flow meter 7, a time display 8 and several control buttons. The flow meter 7 is connected to the flow regulator 10 for detecting the flow rate. The time display 8 is used to display the time. The control buttons include an air intake flow adjustment knob, a time adjustment knob, a sampling key 13, etc., for controlling the air intake flow rate, time, and start / stop operation.

[0034] Understandably, a battery is also installed inside the housing 1 to provide power for the various working components.

[0035] The specific working principle is as follows:

[0036] According to the type of dust, install the corresponding sampling filter membrane at the inlet of the air inlet pipe 6, and select different installation positions of the filter membrane according to the actual environment. Specifically, when sampling in a dry mine environment, remove the air inlet cover 5 and place the filter membrane inside the air inlet cover 5, so that the filter membrane and the air inlet cover 5 are coaxially set. Reinstall the air inlet cover 5 containing the filter membrane onto the fixed cylinder 502. The flange at the end of the air inlet cylinder 501 and the inner wall of the air inlet cover 5 are used to achieve the compression and limiting of the filter membrane. When sampling in a water-permeable mine or a rainy mine, remove the air inlet cover 6. The air cover 5 and the air inlet cylinder 501 are used to place the sampling filter membrane into the connecting part at the end of the fixed cylinder 502, so that the filter membrane is coaxial with the connecting part. Then, the air inlet cylinder 501 is inserted into the connecting part to press the filter membrane. Finally, the air inlet cover 5 is reinstalled on the fixed cylinder 502. The air inlet cover 5 and the air inlet cylinder 501 are used to cover the filter membrane to prevent water from affecting the filter membrane. In actual use, in order to further improve the waterproof ability, the rain shield 4 above the filter membrane installation assembly can be pulled out to block the seepage or rainwater falling from above.

[0037] As needed, the bracket hole 101 at the bottom of the housing 1 is attached to the bracket. The air intake flow rate and sampling time are adjusted according to the sampling environment and dust type. The sampling button 13 is pressed to perform sampling. After sampling, the sampling filter membrane is removed for subsequent research.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mine explosion-proof dust sampling device, comprising: The housing (1) is characterized in that a battery and an air pump (11) are provided inside the housing (1). The air pump (11) is connected to an air inlet pipe (6) and an air outlet pipe (12). The ends of the air inlet pipe (6) and the air outlet pipe (12) that are away from the air pump (11) both pass through the housing (1) laterally and extend outward. A hollow filter membrane mounting assembly is detachably installed at the port of the air inlet pipe (6) extending out of the housing (1). The filter membrane mounting assembly includes a fixing cylinder (502) fixedly installed at the port of the air inlet pipe (6). A connecting part is fixedly provided at the end of the fixing cylinder (502). An air inlet cylinder (501) is inserted into the connecting part. An air inlet cover (5) is detachably installed on the connecting part. One end of the air inlet cylinder (501) extends outward from the connecting part and is placed inside the air inlet cover (5). Filter membrane mounting positions are provided between the air inlet cover (5) and the end of the air inlet cylinder (501), and between the end of the air inlet cylinder (501) and the connecting part.

2. The mine explosion-proof dust sampling device according to claim 1, characterized in that, One end of the air inlet cylinder (501) extends outward to the connecting part and is fixedly provided with a flange. A filter membrane installation position is provided between the flange and the air inlet cover (5).

3. The mine explosion-proof dust sampling device according to claim 1, characterized in that, The top of the housing (1) is detachably fitted with a rain shield assembly.

4. The mine explosion-proof dust sampling device according to claim 3, characterized in that, The rainproof assembly includes a storage box (3) installed on the top of the housing (1). A groove (301) is provided on the storage box (3). A rainproof plate (4) is slidably provided in the groove (301). The rainproof plate (4) is located above the filter membrane mounting assembly. A push rod (401) is fixedly connected to the rainproof plate (4). One end of the push rod (401) extends outward from the storage box (3).

5. The mine explosion-proof dust sampling device according to claim 1, characterized in that, The bottom of the housing (1) is provided with a bracket hole (101), and a buffer pad (2) is fixedly provided at the bottom of the housing (1). A handle (9) is rotatably connected to the upper part of the housing (1).

6. The mine explosion-proof dust sampling device according to claim 1, characterized in that, A flow regulator (10) is installed on the intake pipe (6).

7. The mine explosion-proof dust sampling device according to claim 6, characterized in that, A filter membrane bag groove (102) is provided on the outer wall of the housing (1), and a control mechanism is also fixed on the outer wall of the housing (1). The control mechanism is connected to the air pump (11) and the flow regulator (10).

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