Collecting device for coal mine tunnel pulverized coal

Abstract

The invention relates to the technical field of mining equipment, and provides a coal mine tunnel pulverized coal collecting device which comprises a collecting bin, and the collecting bin is provided with a first inlet and a first outlet; the first screen is arranged in the collecting bin and divides the collecting bin into a first storage bin and a cleaning bin, the first storage bin is used for storing pulverized coal, and the first inlet, the first storage bin, the cleaning bin and the first outlet are sequentially communicated; the flow meter is arranged at the first outlet; the knocking piece is arranged on the collecting bin and used for knocking the first screen. By means of the technical scheme, the problem that in the prior art, blockage is likely to happen when pulverized coal in a coal mine tunnel is collected is solved.

Description

Technical Field

[0001] The invention relates to the technical field of mining equipment, and in particular to a device for collecting coal dust in a coal mine tunnel. Background Art

[0002] In the process of coal mining, tunnels are indispensable working spaces. With the progress of coal mining, tunneling and other operations, a large amount of coal dust will be generated. These coal dusts mainly come from the crushing, transportation and operation of coal bodies. For example, when a coal mining machine cuts a coal seam, it will break the coal body into fine particles, part of which will be dispersed in the air of the tunnel in the form of coal dust. According to statistics, in some coal mine tunnels, the amount of coal dust generated per hour can reach several cubic meters or even more, and the specific amount varies depending on factors such as the mining process of the coal mine and the conditions of the coal seam. The accumulation of coal dust in the tunnel will increase the risk of dust explosion. It poses a serious threat to the life safety of coal miners and mine facilities. Workers who are in an environment contaminated by coal dust for a long time are also prone to occupational diseases such as pneumoconiosis, which seriously affects their health. In addition, the accumulation of coal dust will also cause corrosion and damage to the equipment in the tunnel, shorten the service life of the equipment, and increase the maintenance cost of the coal mine.

[0003] Traditional coal dust collection devices often use simple dust collection methods, such as using fans to directly suck the air from the tunnel. However, as time goes by, the dust collection port is easily blocked by coal dust, further reducing the collection efficiency. Once blocked, not only does it need to be shut down for cleaning, affecting production progress, but it may also damage the equipment. Summary of the invention

[0004] The present invention provides a device for collecting coal powder in a coal mine tunnel, which solves the problem in the related art that coal powder in a coal mine tunnel is easily blocked.

[0005] The technical solution of the present invention is as follows: A device for collecting coal dust in a coal mine tunnel, comprising: a collection bin having a first inlet and a first outlet; a first screen, wherein the first screen is disposed in the collecting bin to separate the collecting bin into a first storage bin and a cleaning bin, wherein the first storage bin is used to store pulverized coal, and the first inlet, the first storage bin, the cleaning bin and the first outlet are sequentially connected; a flow meter, the flow meter being arranged at the first outlet; A knocking piece is arranged on the collecting bin, and is used for knocking the first screen.

[0006] Optionally, it also includes: A front separation bin, which is arranged on one side of the collection bin and has a second inlet and a second outlet; a second screen, wherein the second screen is arranged in the front separation bin to separate the front separation bin into a second storage bin and a buffer bin, and the second inlet, the second storage bin, the buffer bin and the second outlet are connected in sequence; A first connecting pipe, wherein two ends of the first connecting pipe are respectively connected to the second outlet and the first inlet.

[0007] Optionally, the collection bin further has a third inlet, the third inlet is communicated with the first storage bin, the front separation bin has a third outlet, the third outlet is communicated with the second storage bin, and further comprises: a second connecting pipe, wherein two ends of the second connecting pipe are respectively connected to the third inlet and the third outlet; A sealing plate, wherein two sealing plates are provided, and the sealing plates are slidably arranged at the third inlet and the third outlet.

[0008] Optionally, the second connecting pipe is linear.

[0009] Optionally, it also includes: The first guide plate is tiltedly arranged in the second storage bin, there are two first guide plates, a first air flow outlet is formed between the two first guide plates, and the first air flow outlet is close to the second screen.

[0010] Optionally, it also includes: A first flow equalizer plate is disposed in the second storage bin, the first air flow outlet is located below the first flow equalizer plate, and a first air outlet gap is formed between the first flow equalizer plate and the first guide plate.

[0011] Optionally, it also includes: a second guide plate, the second guide plate being tiltedly arranged in the first storage bin, the second guide plate being provided with two, a second air flow outlet being formed between the two second guide plates, and the second air flow outlet being close to the first screen; A second flow equalizer plate is provided in the first storage bin, the second air flow outlet is located below the second flow equalizer plate, and a second air outlet gap is formed between the second flow equalizer plate and the second guide plate.

[0012] Optionally, the first screen and the second screen have the same structure, and the first screen comprises: A screening frame, the screening frame is arranged in the collecting bin; A transverse plate, wherein the transverse plates are provided in plurality and the plurality of transverse plates are arranged on the screening frame at intervals; There are multiple longitudinal plates, and the multiple longitudinal plates are arranged on the screening frame at intervals, and the longitudinal plates and the transverse plates are perpendicular to each other.

[0013] Optionally, it also includes: A dispersion plate is arranged on the transverse plate and is used for abutting against the striking member.

[0014] Optionally, it also includes: A guide rod, one end of which is disposed on the sealing plate, and the other end of which passes through the bottom of the collecting bin or the front separation bin; a first telescopic member, wherein the first telescopic member is disposed on the collecting bin; A connecting plate is arranged on the output end of the first telescopic member, and the guide rod is arranged on the connecting plate.

[0015] The working principle and beneficial effects of the present invention are: In the present invention, a first screen is installed inside the collecting bin to separate it into a first storage bin and a cleaning bin. The first inlet is connected to the tunnel and the collecting bin, and the first outlet is connected to the exhaust fan. After the exhaust fan is working, the coal powder enters the first storage bin of the collecting bin from the first inlet. After the coal powder is collected for a period of time, it may block the first screen. At this time, the knocking piece set on the collecting bin works to knock the first screen, so that the coal powder attached to the first screen falls off, thereby ensuring the filtering effect of the first screen. Gas and other substances filtered by the first screen enter the cleaning bin and are finally discharged from the first outlet. A flow meter is installed at the first outlet to monitor the flow rate of the exhaust gas. By setting up a special collecting bin and a first storage bin, a specific storage space is provided for coal powder, which can effectively collect coal powder in the coal mine tunnel and prevent the coal powder from floating around at will to cause harm to the environment and workers.

[0016] The setting of the first screen realizes the preliminary separation of coal powder and other substances, so that the substances entering the cleaning bin are relatively pure, which is conducive to subsequent processing or discharge. Due to the existence of the first screen, the risk of exhaust fan blockage is greatly reduced. Through the coordinated use of the first screen and the knocking piece, once blockage occurs, the first screen can be cleaned in time to prevent it from being blocked by coal powder accumulation, ensuring the continuous and stable operation of the collection device and improving work efficiency.

[0017] The installation of the flow meter can monitor the flow of materials discharged from the first outlet in real time, provide data reference for the staff, and facilitate the understanding of the operating status of the device and related regulation. In the same time period, the concentration of coal powder can be monitored in real time through the monitoring of the flow meter. Once the concentration exceeds the limit, it is convenient for the staff to take safety measures in time to improve the safety of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the local structure of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic diagram of a local structure from another angle of the present invention; Figure 6 This is a schematic diagram of the internal structure of the collection bin of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at B in the middle.

[0020] In the figure: 1, collecting bin, 101, first inlet, 102, first outlet, 2, first screen, 103, first storage bin, 104, cleaning bin, 3, flow meter, 4, knocking piece, 5, front separation bin, 501, second inlet, 502, second outlet, 6, second screen, 503, second storage bin, 504, buffer bin, 7, first connecting pipe, 106, third inlet, 105, third outlet, 8, second connecting pipe, 9, sealing plate, 11, first guide plate, 111, first air flow outlet, 12, first uniform flow plate, 112, first air outlet gap, 21, second guide plate, 211, second air flow outlet, 22, second uniform flow plate, 212, second air outlet gap, 201, screening frame, 202, horizontal plate, 203, vertical plate, 204, dispersion plate, 13, guide rod, 14, first telescopic member, 15, connecting plate. DETAILED DESCRIPTION In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0021] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0022] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] Reference Figure 1 to Figure 7 , which is the first embodiment of the present invention, proposes a device for collecting coal powder in a coal mine tunnel, including a collecting bin 1, the collecting bin 1 having a first inlet 101 and a first outlet 102; a first screen 2 is arranged in the collecting bin 1, dividing the collecting bin 1 into a first storage bin 103 and a cleaning bin 104, the first storage bin 103 is used to store coal powder, the first inlet 101, the first storage bin 103, the cleaning bin 104 and the first outlet 102 are connected in sequence; a flow meter 3 is arranged at the first outlet 102; a knocking piece 4 is arranged on the collecting bin 1, and the knocking piece 4 is used to knock the first screen 2.

[0025] In this embodiment, a first screen 2 is installed inside the collecting bin 1 to separate it into a first storage bin 103 and a cleaning bin 104. The first inlet 101 connects the tunnel with the collecting bin 1, and the first outlet 102 is connected to the exhaust fan. After the exhaust fan works, the coal powder enters the first storage bin 103 of the collecting bin 1 from the first inlet 101. After the coal powder is collected for a period of time, it may block the first screen 2. At this time, the knocking piece 4 set on the collecting bin 1 works to knock the first screen 2, so that the coal powder attached to the first screen 2 falls off, thereby ensuring the filtering effect of the first screen 2. The gas and other substances filtered by the first screen 2 enter the cleaning bin 104, and finally discharged from the first outlet 102. A flow meter 3 is installed at the first outlet 102 to monitor the flow rate of the discharged gas. By setting up a special collecting bin 1 and a first storage bin 103, a specific storage space is provided for the coal powder, which can effectively collect the coal powder in the coal mine tunnel and prevent the coal powder from floating randomly to cause harm to the environment and workers.

[0026] The setting of the first screen 2 realizes the preliminary separation of coal powder and other substances, so that the substances entering the cleaning bin 104 are relatively pure, which is conducive to subsequent processing or discharge. Due to the presence of the first screen 2, the risk of blockage of the exhaust fan is greatly reduced. Through the coordinated use of the first screen 2 and the knocking piece 4, once blockage occurs, the first screen 2 can be cleaned in time to prevent it from being blocked by coal powder accumulation, thereby ensuring the continuous and stable operation of the collection device and improving work efficiency.

[0027] The installation of the flow meter 3 can monitor the flow of the material discharged from the first outlet 102 in real time, provide data reference for the staff, and facilitate the understanding of the operating status of the device and related regulation. In the same time period, the concentration of the coal powder can be monitored in real time through the monitoring of the flow meter 3. Once the concentration exceeds the limit, it is convenient for the staff to take safety measures in time to improve the safety of production.

[0028] Furthermore, it also includes a front separation bin 5, which is arranged on one side of the collecting bin 1, and has a second inlet 501 and a second outlet 502; a second screen 6 is arranged in the front separation bin 5, and divides the front separation bin 5 into a second storage bin 503 and a buffer bin 504, and the second inlet 501, the second storage bin 503, the buffer bin 504 and the second outlet 502 are connected in sequence; and both ends of the first connecting pipe 7 are connected to the second outlet 502 and the first inlet 101 respectively.

[0029] In this embodiment, a pre-separation bin 5 is arranged on one side of the collection bin 1. The coal powder in the coal mine roadway first enters the second storage bin 503 of the pre-separation bin 5 through the second entrance 501. Due to the presence of the second screen 6, the coal powder can be initially separated, and the blocked coal powder enters and falls into the second storage bin 503. The remaining gas enters the buffer bin 504 and then enters the collection bin 1 through the first connecting pipe 7, so that the pre-separated material is further processed in the collection bin 1. The addition of the pre-separation bin 5 and the second screen 6 forms a two-stage separation structure, which can more effectively separate and collect the coal powder in the coal mine roadway, and improve the separation effect and accuracy.

[0030] The setting of the buffer bin 504 can play a certain buffering role, making the material flow from the front separation bin 5 into the collection bin 1 more stable, extending the flow path of the inhaled gas in the collection device, reducing the impact on the collection device, and extending the service life of the equipment.

[0031] Furthermore, the collecting bin 1 also has a third inlet 106, which is connected to the first storage bin 103; the front separation bin 5 has a third outlet 105, which is connected to the second storage bin 503; and the second connecting pipe 8 has two ends connected to the third inlet 106 and the third outlet 105 respectively; there are two sealing plates 9, and sealing plates 9 are slidably arranged at the third inlet 106 and the third outlet 105.

[0032] In this embodiment, the third inlet 106 and the third outlet 105 are connected by the second connecting pipe 8, so that another connecting passage is formed between the collection bin 1 and the front separation bin 5, and the opening and closing of the third inlet 106 and the third outlet 105 are controlled by the sliding sealing plate 9. Since the front separation bin 5 is first in contact with the coal powder, after working for a period of time, the second screen 6 is prone to blockage. At this time, although the second screen 6 can be cleaned by the knocking member 4, the gas flow through the second screen 6 is reduced, which not only affects the collection efficiency of the coal powder, but also easily causes danger if the power of the exhaust fan is not adjusted in time. Therefore, when cleaning the second screen 6, the third inlet 106 and the third outlet 105 can be opened by sliding the sealing plate 9, so that the inhaled gas does not pass through the second screen 6, but directly passes through the second connecting pipe 8 and enters the collection bin 1. After the second screen 6 is cleaned, the sealing plate 9 is slid in the opposite direction to close the third inlet 106 and the third outlet 105, and the normal operation of the front separation bin 5 is restored. When the flow meter 3 detects a sudden change in gas flow, the pressure in the two chambers can be balanced, which not only improves the convenience and flexibility of equipment maintenance, but also makes the operation of the equipment safer and more stable.

[0033] Furthermore, the second connecting pipe 8 is linear.

[0034] In this embodiment, the second connecting pipe 8 is designed to be linear. During the installation process, ensure that the second connecting pipe 8 connects the third inlet 106 of the collection bin 1 and the third outlet 105 of the pre-separation bin 5 in a linear manner. The linear design makes the flow of the material in the second connecting pipe 8 smoother, reduces the resistance and blockage risk that may be caused by the bending of the pipe, and reduces the probability of equipment failure. At the same time, it is relatively simpler and more convenient in terms of manufacturing and installation, reduces the cost and construction difficulty, and saves installation time and labor costs.

[0035] Furthermore, it also includes a first guide plate 11, which is tiltedly arranged in the second storage bin 503, and has two first guide plates 11. A first airflow outlet 111 is formed between the two first guide plates 11, and the first airflow outlet 111 is close to the second screen 6.

[0036] In this embodiment, two first guide plates 11 are obliquely arranged in the second storage bin 503 of the front separation bin 5. When coal powder and other materials enter the second storage bin 503, they will flow along the oblique direction of the first guide plates 11 under the action of gravity and airflow, and finally flow to the second screen 6 through the first airflow outlet 111 for filtration. This design can guide the flow direction of coal powder, so that it can be separated and filtered more orderly, thereby improving the separation efficiency. Under the action of gravity and the resistance of the first guide plate 11, coal powder is more likely to fall into the second storage bin 503. By optimizing the flow path of coal powder, coal powder can be separated from air more quickly and more fully, further improving the working performance of the entire collection device. The inclined first guide plate 11 has a simple structure, is easy to manufacture and install, and can achieve optimized control of coal powder flow without adding too much complex equipment, and has high practicality and economy.

[0037] Furthermore, it also includes a first flow equalizer 12, which is arranged in the second storage bin 503, and the first air flow outlet 111 is located below the first flow equalizer 12, and a first air outlet gap 112 is formed between the first flow equalizer 12 and the first guide plate 11.

[0038] In this embodiment, a first flow-distributing plate 12 is provided in the second storage bin 503 of the front separation bin 5. When the gas is discharged through the first airflow outlet 111, it will first pass through the first flow-distributing plate 12, making the gas flow rate more uniform and the flow direction more dispersed. The first flow-distributing plate 12 can play a certain role in blocking and dispersing the gas, so that the gas can be discharged evenly through the first air outlet gap 112, avoiding the impact of concentrated gas discharge on the equipment and subsequent processing links, and ensuring the stability and reliability of the equipment operation. At the same time, it also helps to improve the separation effect of gas and coal powder and other substances.

[0039] Furthermore, it also includes a second guide plate 21, which is obliquely arranged in the first storage bin 103, and has two second guide plates 21, and a second air flow outlet 211 is formed between the two second guide plates 21, and the second air flow outlet 211 is close to the first screen 2; the second flow equalizer 22 is arranged in the first storage bin 103, and the second air flow outlet 211 is located below the second flow equalizer 22, and a second air outlet gap 212 is formed between the second flow equalizer 22 and the second guide plate 21.

[0040] In this embodiment, two second guide plates 21 are obliquely arranged in the first storage bin 103 of the collecting bin 1, and the second airflow outlet 211 is located below the second flow equalizer 22. When the coal powder and other materials are in the first storage bin 103, the second guide plate 21 guides the coal powder to flow to the second airflow outlet 211, and the second flow equalizer 22 performs flow equalization on the discharged gas, so that the gas can be evenly discharged through the second air outlet gap 212, thereby ensuring the stable operation and efficient work of the equipment.

[0041] The setting of the second guide plate 21 optimizes the flow path of the coal powder in the first storage bin 103, and improves the collection efficiency and filtering effect of the coal powder. The function of the second flow plate 22 is similar to that of the first flow plate 12, which can make the gas discharge uniformly, reduce the impact of the gas flow on the equipment, and ensure the stability and reliability of the equipment operation. The function of the collection bin 1 is further improved, and the comprehensive performance of the entire collection device is improved, so that it can operate more efficiently and stably in the coal mine roadway coal powder collection work.

[0042] Furthermore, the first screen 2 and the second screen 6 have the same structure. The first screen 2 includes a screening frame 201, which is arranged in the collecting bin 1; there are multiple transverse plates 202, which are spaced apart on the screening frame 201; there are multiple longitudinal plates 203, which are spaced apart on the screening frame 201, and the longitudinal plates 203 and the transverse plates 202 are perpendicular to each other.

[0043] In this embodiment, the first screen 2 and the second screen 6 adopt the same structural design. The screening frame 201 of the screen is installed in the corresponding collecting bin 1 or the front separation bin 5. A plurality of transverse plates 202 and longitudinal plates 203 are arranged at intervals on the screening frame 201, and the transverse plates 202 and the longitudinal plates 203 are perpendicular to each other. This structure forms a relatively fine screen structure, which can effectively separate coal powder and other substances.

[0044] The screening frame 201 and the horizontal plate 202 and the vertical plate 203 thereon form a relatively stable structure, which can withstand certain pressure and impact force, ensure the stability and reliability of the screen during operation, and extend the service life of the screen. At the same time, the horizontal plate 202 and the vertical plate 203 are all modularly designed, which is more convenient for maintenance. When the first screen 2 or the second screen 6 cannot be cleaned by knocking, the screening frame 201, the horizontal plate 202 and the vertical plate 203 can be disassembled and cleaned separately.

[0045] Furthermore, a dispersion plate 204 is included. The dispersion plate 204 is arranged on the transverse plate 202 , and the dispersion plate 204 is used to abut against the knocking member 4 .

[0046] In this embodiment, a dispersion plate 204 is provided on the horizontal plate 202 of the first screen 2. When the knocking member 4 knocks the first screen 2, the dispersion plate 204 can abut against the knocking member 4. The function of the dispersion plate 204 is to evenly disperse the knocking force of the knocking member 4 to the first screen 2 or the second screen 6, so as to avoid damage due to excessive local force, thereby extending the service life of the equipment. When used in conjunction with the knocking member 4, the effect of cleaning the screen is further improved, ensuring that the screen always maintains a good filtering state, and reducing the problems of equipment failure and reduced work efficiency caused by screen blockage.

[0047] Furthermore, it also includes a guide rod 13, one end of which is arranged on the sealing plate 9, and the other end passes through the bottom of the collecting bin 1 or the front separation bin 5; the first telescopic member 14 is arranged on the collecting bin 1; the connecting plate 15 is arranged at the output end of the first telescopic member 14, and the guide rod 13 is arranged on the connecting plate 15.

[0048] In this embodiment, when it is necessary to control the sliding of the sealing plate 9, the connecting plate 15 is moved by the telescopic action of the first telescopic member 14, and then the sealing plate 9 is driven to slide at the corresponding entrance or exit through the guide rod 13. For example, when it is necessary to close the third entrance 106 or the third exit 105, the first telescopic member 14 is extended, and the sealing plate 9 is pulled to slide to the closed position through the guide rod 13; when it is necessary to open, the first telescopic member 14 is retracted, and the sealing plate 9 is pushed to slide to the open position. Through the cooperation of the guide rod 13 and the first telescopic member 14, the sliding position of the sealing plate 9 can be accurately controlled, and the third entrance 106 and the third exit 105 can be accurately opened and closed, thereby improving the accuracy and reliability of the equipment operation.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for collecting coal dust in coal mine tunnels, characterized in that: include: A collecting bin (1), the collecting bin (1) having a first inlet (101) and a first outlet (102); a first screen (2), the first screen (2) being arranged in the collecting bin (1) to separate the collecting bin (1) into a first storage bin (103) and a cleaning bin (104), the first storage bin (103) being used to store coal powder, the first inlet (101), the first storage bin (103), the cleaning bin (104) and the first outlet (102) being connected in sequence; a flow meter (3), the flow meter (3) being arranged at the first outlet (102); A knocking piece (4), the knocking piece (4) being arranged on the collecting bin (1), the knocking piece (4) being used to knock the first screen (2).

2. The device for collecting coal dust in coal mine tunnels according to claim 1, characterized in that: Also includes: A front separation bin (5), the front separation bin (5) being arranged on one side of the collection bin (1), the front separation bin (5) having a second inlet (501) and a second outlet (502); a second screen (6), wherein the second screen (6) is arranged in the front separation bin (5) to separate the front separation bin (5) into a second storage bin (503) and a buffer bin (504), wherein the second inlet (501), the second storage bin (503), the buffer bin (504) and the second outlet (502) are sequentially connected; A first connecting pipe (7), wherein two ends of the first connecting pipe (7) are respectively connected to the second outlet (502) and the first inlet (101).

3. The device for collecting coal dust in coal mine tunnels according to claim 2, characterized in that: The collecting bin (1) further comprises a third inlet (106), the third inlet (106) being in communication with the first storage bin (103); the front separation bin (5) comprises a third outlet (105), the third outlet (105) being in communication with the second storage bin (503); and further comprises: A second connecting pipe (8), wherein two ends of the second connecting pipe (8) are respectively connected to the third inlet (106) and the third outlet (105); A sealing plate (9), wherein two sealing plates (9) are provided, and the sealing plates (9) are slidably arranged at both the third inlet (106) and the third outlet (105).

4. The device for collecting coal dust in coal mine tunnels according to claim 3, characterized in that: The second connecting pipe (8) is linear.

5. The device for collecting coal dust in coal mine tunnels according to claim 2, characterized in that: Also includes: A first guide plate (11), the first guide plate (11) being arranged obliquely in the second storage bin (503), the first guide plate (11) having two first guide plates (11), a first air flow outlet (111) being formed between the two first guide plates (11), the first air flow outlet (111) being close to the second screen (6).

6. The device for collecting coal dust in coal mine tunnels according to claim 5, characterized in that: Also includes: A first flow equalizer plate (12), wherein the first flow equalizer plate (12) is arranged in the second storage bin (503), the first air flow outlet (111) is located below the first flow equalizer plate (12), and a first air outlet gap (112) is formed between the first flow equalizer plate (12) and the first guide plate (11).

7. The device for collecting coal dust in coal mine tunnels according to claim 4, characterized in that: Also includes: a second guide plate (21), the second guide plate (21) being arranged obliquely in the first storage bin (103), the second guide plate (21) having two second guide plates (21), a second air flow outlet (211) being formed between the two second guide plates (21), the second air flow outlet (211) being close to the first screen (2); A second flow equalizer plate (22), wherein the second flow equalizer plate (22) is arranged in the first storage bin (103), the second air flow outlet (211) is located below the second flow equalizer plate (22), and a second air outlet gap (212) is formed between the second flow equalizer plate (22) and the second guide plate (21).

8. The device for collecting coal dust in coal mine tunnels according to claim 2, characterized in that: The first screen (2) and the second screen (6) have the same structure, and the first screen (2) comprises: A screening frame (201), the screening frame (201) being arranged in the collecting bin (1); A transverse plate (202), wherein a plurality of the transverse plates (202) are provided, and the plurality of the transverse plates (202) are arranged at intervals on the screening frame (201); A longitudinal plate (203), wherein the longitudinal plates (203) are provided in plurality, and the plurality of longitudinal plates (203) are arranged at intervals on the screening frame (201), and the longitudinal plates (203) and the transverse plates (202) are perpendicular to each other.

9. The device for collecting coal dust in coal mine tunnels according to claim 8, characterized in that: Also includes: A dispersion plate (204), the dispersion plate (204) being arranged on the transverse plate (202), the dispersion plate (204) being used for abutting against the striking member (4).

10. The device for collecting coal dust in coal mine tunnels according to claim 3, characterized in that: Also includes: A guide rod (13), one end of the guide rod (13) being arranged on the sealing plate (9), and the other end of the guide rod (13) passing through the bottom of the collecting bin (1) or the front separation bin (5); A first telescopic member (14), wherein the first telescopic member (14) is arranged on the collecting bin (1); A connecting plate (15), the connecting plate (15) being arranged at the output end of the first telescopic member (14), and the guide rod (13) being arranged on the connecting plate (15).

Images