Gas detection device based on laser principle for coal mine

Abstract

The invention discloses a coal mine gas detection device based on a laser principle, which comprises a base, the top end of the base is provided with a vertical rod fixed with the base, the vertical rod is rotatably sleeved with a connecting sleeve, the top end of the connecting sleeve is provided with a detection box, and the detection box is internally provided with a detection channel. A laser transmitter and a laser receiver which are communicated into the detection channel are fixed to the two opposite sides of the detection channel respectively, an air pump with the output end communicated into the detection channel is fixed to the top end of the detection box, the input end of the air pump communicates with an air inlet pipe, the bottom end of the detection channel communicates with an air outlet pipe, and a dust blocking net is fixed to the front end of the air inlet pipe; a flying dust sensor is fixed at the front end of the detection box, a first processor is fixed in the detection box, a motor is fixed on one side of the vertical rod, the output end of the motor rotates through a belt transmission connecting sleeve, and the motor, the flying dust sensor and the first processor are electrically connected. According to the invention, dust raising detection is carried out around the mine, the dust blowing surface is automatically controlled to deviate, and the influence of dust raising on detection is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of gas detection, and in particular to a gas detection device based on the laser principle for coal mines. Background Art

[0002] The detection principle of the laser gas detection device is: the laser scans the gas to be detected, and the detection technology is used to detect the absorption of the laser by the gas to analyze the gas parameters. Although the existing laser gas detection device can realize gas detection, when performing gas detection in coal mines, a large amount of dust will be generated inside the mine due to mining operations, which is easy to adhere to the laser transmitter and laser receiver, affecting the detection effect. Summary of the invention

[0003] The purpose of this application is to provide a gas detection device based on the laser principle for coal mines to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a gas detection device based on the laser principle for coal mines, comprising a base, a vertical pole, a detection box, a connecting sleeve, a detection channel, a laser transmitter, a laser receiver, an air pump, an air inlet pipe, a dust screen, a first processor, a dust sensor, a motor, a belt and an air outlet pipe, wherein the top of the base is provided with a vertical pole fixedly connected thereto, a connecting sleeve is rotatably mounted on the vertical pole, a detection box fixedly connected thereto is provided at the top of the connecting sleeve, a cylindrical detection channel is vertically arranged inside the detection box, and opposite sides of the detection channel are respectively fixed A laser transmitter and a laser receiver which are passed into the interior are fixedly installed therein, an air pump whose output end passes into the interior of the detection channel is fixedly installed at the top of the detection box, the input end of the air pump is connected to an air inlet pipe, the bottom end of the detection channel is connected to an air outlet pipe, a dust screen is fixedly installed at the front end of the air inlet pipe, a dust sensor is fixedly installed at the front end of the detection box, a first processor is fixedly installed inside the detection box, a motor is fixedly installed on one side of the vertical pole, the output end of the motor drives the connecting sleeve to rotate through a belt, and the motor, the dust sensor and the first processor are electrically connected.

[0005] Preferably, an air duct is provided between the detection channel and the inner wall of the detection box, and a heat sink located outside the detection channel is fixedly mounted on the outer walls of the laser transmitter and the laser receiver, and the heat sink is located in the air duct.

[0006] Preferably, an air inlet connected to the air duct is provided on one side of the detection box, a fan is fixedly installed at the air inlet, and an air outlet connected to the air duct is provided on the other opposite side of the detection box.

[0007] Preferably, a branch pipe connected thereto is fixedly mounted on the air outlet, the output end of the branch pipe is arranged toward the dust screen, a second electrically-controlled valve is fixedly mounted on the branch pipe, and a first electrically-controlled valve is fixedly mounted on the air outlet.

[0008] Preferably, a display is fixedly mounted on the front side of the detection box, a second processor is fixedly mounted inside the detection box, and the second processor, the laser transmitter, the laser receiver and the display are electrically connected.

[0009] Preferably, a distribution box is fixedly mounted on the top of the base.

[0010] Preferably, the dust sensor and the air intake pipe are oriented in the same direction.

[0011] In summary, the technical effects and advantages of the present invention are as follows:

[0012] In the present invention, air is sucked from the air inlet pipe by an air pump and sent into the detection channel, the laser emitted by the laser transmitter is received by the laser receiver, and the absorption of the laser by the measured gas is detected to analyze the gas parameters, the air inlet pipe is protected from dust by a dust screen, and the dust sensor detects the dust in the mine cave. When the dust in the air inlet direction reaches a set concentration threshold, the first processor controls the motor to start, and the motor drives the connecting sleeve to rotate through the belt, so that the detection box rotates to adjust the angle, so that the air inlet end of the air inlet pipe is away from the dust blowing surface, so that the dust entering the detection channel is reduced, the influence on the work of the laser transmitter and the laser receiver is reduced, and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic structural diagram of a gas detection device based on the laser principle for coal mines in an embodiment of the present application;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of a detection box of a gas detection device based on the laser principle for coal mines in an embodiment of the present application; Figure 3 This is a schematic diagram of the detection channel structure of a gas detection device based on the laser principle for coal mines in the embodiment of the present application.

[0016] 1. Base; 2. Pole; 3. Detection box; 4. Connecting sleeve; 5. Detection channel; 6. Laser transmitter;

[0017] 7. Laser receiver; 8. Heat sink; 9. Air inlet; 10. Fan; 11. Air pump; 12. Air inlet pipe; 13. Dust screen;

[0018] 14. Air outlet; 15. First electric-controlled valve; 16. Branch pipe; 17. Second electric-controlled valve; 18. First processor; 19. Second processor; 20. Dust sensor; 21. Motor; 22. Belt; 23. Air outlet pipe; 24. Distribution box. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] It should also be noted that the standard parts used in this application document can be purchased from the market, and can be customized according to the description in the specification and drawings. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to the specific circumstances, and in the absence of clear limitations, machines, parts and equipment can all adopt conventional models in the prior art.

[0022] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0023] Example: Reference Figure 1-3 The gas detection device based on the laser principle for coal mines shown in the figure comprises a base 1, a vertical pole 2, a detection box 3, a connecting sleeve 4, a detection channel 5, a laser transmitter 6, a laser receiver 7, an air pump 11, an air inlet pipe 12, a dust screen 13, a first processor 18, a dust sensor 20, a motor 21, a belt 22 and an air outlet pipe 23. The top of the base 1 is provided with a vertical pole 2 fixedly connected thereto, a connecting sleeve 4 is rotatably mounted on the vertical pole 2, a detection box 3 fixedly connected thereto is provided at the top of the connecting sleeve 4, a vertically arranged cylindrical detection channel 5 is provided inside the detection box 3, a laser transmitter 6 and a laser receiver 7 which are passed into the interior of the detection channel 5 are fixedly mounted on opposite sides of the detection channel 5, an air pump 11 whose output end passes into the interior of the detection channel 5 is fixedly mounted on the top of the detection box 3, an air pump 11 whose input end is connected to the air inlet pipe 12, a bottom end of the detection channel 5 is connected to the air outlet pipe 23, a dust screen 13 is fixedly mounted at the front end of the air inlet pipe 12, and the A dust sensor 20 is fixedly installed at the front end of the detection box 3, a first processor 18 is fixedly installed inside the detection box 3, a motor 21 is fixedly installed on one side of the upright pole 2, and the output end of the motor 21 drives the connecting sleeve 4 to rotate through a belt 22. The motor 21, the dust sensor 20 and the first processor 18 are electrically connected, and air is sucked from the air inlet pipe into the detection channel through an air pump. The laser emitted by the laser transmitter is received by the laser receiver, and the absorption of the laser by the measured gas is detected to analyze the gas parameters. The air inlet pipe is protected from dust by a dust shield net, and the dust sensor detects dust in the mine. When the dust in the air inlet direction reaches the set concentration threshold, the first processor controls the motor to start, and the motor drives the connecting sleeve to rotate through the belt, so that the detection box rotates to adjust the angle, so that the air inlet end of the air inlet pipe is away from the dust blowing surface, so that the dust entering the detection channel is reduced, the impact on the work of the laser transmitter and the laser receiver is reduced, and the work efficiency is improved.

[0024] With the above structure: an air duct is provided between the detection channel 5 and the inner wall of the detection box, and the outer walls of the laser transmitter 6 and the laser receiver 7 are fixedly mounted with a heat sink 8 located outside the detection channel, and the heat sink 8 is located in the air duct for heat dissipation.

[0025] By means of the above structure: an air inlet 9 connected to the air duct is provided on one side of the detection box 3, a fan 10 is fixedly installed at the air inlet 9, and an air outlet 14 connected to the air duct is provided on the other side of the detection box 3. The fan supplies air into the air duct, takes away the heat from the heat sink and is discharged from the air outlet.

[0026] By means of the above structure: a branch pipe 16 connected to the air outlet 14 is fixedly installed on the air outlet 14, the output end of the branch pipe 16 is arranged toward the dust screen 13, a second electric-controlled valve 17 is fixedly installed on the branch pipe 18, and a first electric-controlled valve 15 is fixedly installed on the air outlet 14. When the first electric-controlled valve is opened and the second electric-controlled valve is closed, the air outlet is exhausted normally. When the dust screen needs to be dust-removed and maintained, the first electric-controlled valve is closed and the second electric-controlled valve is opened, and the wind in the air duct is ejected from the branch pipe to the surface of the dust screen to realize air blowing and dust removal.

[0027] With the above structure: a display is fixedly installed on the front side of the detection box 3, a second processor 19 is fixedly installed inside the detection box 3, and the second processor 19, the laser transmitter 6, the laser receiver 7 and the display are electrically connected.

[0028] With the above structure: a distribution box 24 is fixedly mounted on the top of the base 1 .

[0029] With the above structure, the dust sensor 20 and the air intake pipe 12 are oriented in the same direction.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas detection device based on the laser principle for coal mines, characterized in that: The invention comprises a base (1), a vertical pole (2), a detection box (3), a connecting sleeve (4), a detection channel (5), a laser emitter (6), a laser receiver (7), an air pump (11), an air inlet pipe (12), a dust screen (13), a first processor (18), a dust sensor (20), a motor (21), a belt (22) and an air outlet pipe (23), wherein the top of the base (1) is provided with a vertical pole (2) fixedly connected thereto, a connecting sleeve (4) is rotatably sleeved on the vertical pole (2), the top of the connecting sleeve (4) is provided with a detection box (3) fixedly connected thereto, a cylindrical detection channel (5) is vertically arranged inside the detection box (3), and laser emitters (6) and laser receivers (7) are fixedly installed on opposite sides of the detection channel (5) so as to pass into the interior thereof. A laser receiver (7), an air pump (11) whose output end is connected to the inside of the detection channel (5) is fixedly installed at the top of the detection box (3), the input end of the air pump (11) is connected to an air inlet pipe (12), the bottom end of the detection channel (5) is connected to an air outlet pipe (23), a dust screen (13) is fixedly installed at the front end of the air inlet pipe (12), a dust sensor (20) is fixedly installed at the front end of the detection box (3), a first processor (18) is fixedly installed inside the detection box (3), a motor (21) is fixedly installed on one side of the vertical pole (2), the output end of the motor (21) drives the connecting sleeve (4) to rotate through a belt (22), and the motor (21), the dust sensor (20) and the first processor (18) are electrically connected.

2. The gas detection device based on the laser principle for coal mine according to claim 1 is characterized in that: An air duct is provided between the detection channel (5) and the inner wall of the detection box, and a heat sink (8) located outside the detection channel is fixedly mounted on the outer walls of the laser transmitter (6) and the laser receiver (7), and the heat sink (8) is located in the air duct.

3. The gas detection device based on the laser principle for coal mine according to claim 1 is characterized in that: An air inlet (9) communicating with the air duct is provided on one side of the detection box (3), a fan (10) is fixedly installed at the air inlet (9), and an air outlet (14) communicating with the air duct is provided on the other side of the detection box (3).

4. The gas detection device based on the laser principle for coal mine according to claim 1, characterized in that: A branch pipe (16) in communication with the air outlet (14) is fixedly mounted on the air outlet (14), the output end of the branch pipe (16) being arranged toward the dust screen (13), a second electrically controlled valve (17) is fixedly mounted on the branch pipe (18), and a first electrically controlled valve (15) is fixedly mounted on the air outlet (14).

5. The gas detection device based on the laser principle for coal mine according to claim 1, characterized in that: A display is fixedly mounted on the front side of the detection box (3), a second processor (19) is fixedly mounted inside the detection box (3), and the second processor (19), the laser transmitter (6), the laser receiver (7) and the display are electrically connected.

6. The gas detection device based on the laser principle for coal mine according to claim 1, characterized in that: A distribution box (24) is fixedly mounted on the top of the base (1).

7. The gas detection device based on the laser principle for coal mine according to claim 1, characterized in that: The dust sensor (20) and the air intake pipe (12) are oriented in the same direction.

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