A mine gas monitoring and early warning device

Abstract

The utility model discloses a mine gas monitoring and early warning device, which belongs to the field of gas monitoring technology, including a mounting shell, a gas sensor is arranged in the mounting shell, a plurality of connecting tubes are arranged on the outer wall of the mounting shell, the connecting tubes are sealed and movably connected with a retractable sampling tube, a control plug for controlling the connection state between the connecting tube and the inside of the mounting shell is sealed and rotatably arranged in the mounting shell, a motor is fixedly installed at the bottom of the mounting shell, the output end of the motor is coaxially fixedly connected with the control plug, an L-shaped airway is opened in the control plug, and an exhaust fan is arranged at the output end of the airway. The mine gas monitoring and early warning device, by arranging a plurality of sampling tubes, intermittently driving the control plug to rotate by a motor, connecting different sampling tubes, and extracting the gas at the corresponding position of the sampling tube by the exhaust fan for detection, enables a single monitoring and early warning device to cover a wider detection range.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine gas monitoring, and in particular relates to a mine gas monitoring and early warning device. Background Art

[0002] When the gas concentration exceeds a certain limit, there is a risk of gas explosion, which directly threatens the life safety of mine workers. To ensure safety, combustible gas monitoring alarms are usually installed in coal mines. Combustible gas monitoring alarms can monitor the gas concentration in coal mines online. Once the gas concentration exceeds the standard, the combustible gas monitoring alarm will sound an alarm to alert relevant staff.

[0003] Gas density is less than that of air, and it usually floats in the upper layers of the mine. In the prior art, combustible gas monitoring alarms and gas detectors are usually installed on the top of the mine tunnel to monitor gas concentration. However, due to the poor gas flow in the mine, the gas escape speed is slow. If the monitoring alarm simply relies on gas escaping to the gas sensor to monitor gas concentration, the actual monitoring range is small. In practice, in order to ensure safe production in the mine, the installation interval of the monitoring device is small and the installation density is often large, which leads to increased costs.

[0004] For example, a coal mine gas detection device disclosed in CN202322515673.8 uses a turbofan to take in air from above, and then uses a gas sensor for detection, and its detection range is also very small. To this end, we propose a mine gas monitoring and early warning device to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that the gas monitoring device has a small monitoring range and requires a large installation density resulting in increased costs, and proposes a mine gas monitoring and early warning device.

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

[0007] A mine gas monitoring and early warning device comprises a mounting shell, a gas sensor is arranged in the mounting shell, a plurality of connecting pipes are arranged on the outer wall of the mounting shell, the connecting pipes are sealingly and movably connected with a retractable sampling tube, a control plug for controlling the connection state between the connecting pipe and the inside of the mounting shell is sealingly and rotatably arranged in the mounting shell, a motor is fixedly mounted on the bottom of the mounting shell, the output end of the motor is coaxially and fixedly connected with the control plug, an L-shaped airway is opened in the control plug, the airway and the connecting pipe are at the same horizontal height, when the input end of the airway is aligned with the connecting pipe, the connecting pipe is connected with the mounting shell, an exhaust fan is arranged on the output end of the airway, the exhaust fan corresponds to the gas sensor, an exhaust port is also opened on the outer wall of the mounting shell, and a protective net is arranged in the exhaust port.

[0008] Furthermore, the sampling tube includes a movable tube, and an extension tube is sealingly and slidably provided at one end of the movable tube away from the connecting tube. The end of the extension tube is bent downward and fixedly mounted with a conical cover, and a filter is provided at the opening of the conical cover.

[0009] Furthermore, a spherical cover is provided at the outer end of the connecting pipe, and a spherical sleeve is provided at one end of the movable pipe close to the connecting pipe, and the spherical cover and the spherical sleeve are sealed and movably connected.

[0010] Furthermore, it also includes a plurality of buzzer warning lights fixed on the outer wall of the mounting shell, the buzzer warning lights correspond one-to-one to the sampling tubes, and the buzzer warning lights are communicatively connected to the gas sensor, and the control plug is provided with a connection structure for controlling the connection state of the buzzer warning lights.

[0011] Furthermore, the connection structure includes a U-shaped conductive rod fixedly mounted on the control plug, the conductive rod being located on the side where the airway input end is located, a mounting ring being fixedly mounted in the mounting shell, two slots being provided on the inner wall of the mounting ring, the positive and negative terminals of the buzzer warning light being respectively extended into different slots, and the two ends of the conductive rod being respectively fitted with different inner walls of the slots.

[0012] Furthermore, a C-shaped mounting frame is arranged on the top of the mounting shell, a mounting hole is opened on the mounting frame, and an expansion bolt is arranged in the mounting hole.

[0013] In summary, the utility model has the following beneficial technical effects:

[0014] The utility model can control the positions of different sampling tubes by arranging multiple sampling tubes, monitor different areas at the same time, and can connect different sampling tubes by intermittently driving the control plug to rotate through the motor, and extract the gas at the corresponding position of the sampling tube by the exhaust fan for detection, so that a single monitoring and early warning device can cover a wider detection range, so the design and installation density of the detection device can be reduced during installation, thereby reducing the cost.

[0015] The utility model cooperates with the buzzer warning light and can make the buzzer warning light at the corresponding position flash and emit a prompt sound when the gas content exceeds the standard, so as to remind the staff to take measures in time and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the internal cross-sectional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the utility model when viewed from above;

[0019] Figure 4 It is a structural schematic diagram of the longitudinal section of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the cross section of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the control plug in the utility model;

[0022] Figure 7 It is a schematic cross-sectional structural diagram of the installation shell in the utility model.

[0023] In the figure: 1. Mounting shell; 11. Connecting pipe; 12. Spherical cover; 13. Mounting ring; 14. Slot; 15. Mounting frame; 16. Protective net; 2. Sampling tube; 21. Movable tube; 22. Extension tube; 23. Conical cover; 24. Filter; 25. Spherical sleeve; 3. Gas sensor; 4. Control plug; 41. Airway; 42. Exhaust fan; 43. Conductive rod; 5. Motor; 6. Buzzer warning light. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0025] Reference Figure 1-3 A mine gas monitoring and early warning device includes a mounting shell 1, in which a gas sensor 3 is arranged. The gas sensor 3 is a prior art and is used to detect the gas content in the air. A C-shaped mounting frame 15 is arranged on the top of the mounting shell 1. The mounting frame 15 is provided with a mounting hole. An expansion bolt is arranged in the mounting hole. During installation, a hole is drilled at a suitable position of the mine tunnel, and the mounting frame 15 is fixed by the expansion bolt to keep the monitoring and early warning device stable.

[0026] Reference Figure 1-5The outer wall of the installation shell 1 is provided with a plurality of connecting tubes 11, and the connecting tube 11 is sealed and movably connected with a retractable sampling tube 2. Through the sampling tube 2, gases at different positions can be introduced into the installation shell 1 for detection, so as to achieve the purpose of expanding the monitoring range, thereby reducing the installation density of the monitoring and early warning device and reducing the cost. A control plug 4 for controlling the connection state between the connecting tube 11 and the inside of the installation shell 1 is provided in a sealed and rotatable manner inside the installation shell 1. A motor 5 is fixedly installed at the bottom of the installation shell 1, and the output end of the motor 5 is coaxially fixedly connected to the control plug 4. The motor 5 is a servo motor, and the motor 5 rotates intermittently to drive the control plug 4 to rotate. An L-shaped airway 41 is provided in the control plug 4, and the airway 41 and the connecting tube 11 are at the same horizontal height. When the input end of the airway 41 is aligned with the connecting tube 11, the connecting tube 11 is connected to the inside of the installation shell 1. Each time the control plug 4 rotates, the airway 41 can only One of the connecting pipes 11 is connected, and the other connecting pipes 11 are in a closed state. Therefore, only the connecting pipe 11 in the connected state can take in air into the installation shell 1. At this time, the end of the sampling tube 2 is the monitoring area. The motor 5 drives the control plug 4 to rotate intermittently, so that the monitoring and early warning device monitors the corresponding positions of different sampling tubes 2, thereby achieving the purpose of expanding the monitoring range. Since the gas escape process is not explosive, continuous monitoring is not required. The above intermittent monitoring can not only achieve the purpose of large-scale monitoring, but also reduce equipment cost and equipment energy consumption.

[0027] Reference Figure 2-3 The sampling tube 2 includes a movable tube 21, and an extension tube 22 is sealed and slidably provided at one end of the movable tube 21 away from the connecting tube 11. The distance adjustment of the monitoring area can be achieved through the telescopic sliding of the extension tube 22, thereby improving the scope of application. The end of the extension tube 22 is bent downward and a conical cover 23 is fixedly installed thereon, thereby preventing falling dust and debris from entering the sampling tube 2 and causing blockage. A filter screen 24 is provided at the opening of the conical cover 23, and the gas extracted from the sampling tube 2 can be filtered through the filter screen 24, thereby preventing dust diffused in the mine air from entering the installation shell 1 and affecting the monitoring of the gas sensor 3.

[0028] Reference Figure 4-5 A spherical cover 12 is provided at the outer end of the connecting tube 11, and a spherical sleeve 25 is provided at one end of the movable tube 21 close to the connecting tube 11. The spherical cover 12 and the spherical sleeve 25 are sealed and movably connected. Through the cooperation of the spherical sleeve 25 and the spherical cover 12, the movable tube 21 can be freely rotated at the connection position of the connecting tube 11. Therefore, the sampling range can be any position within the spherical area with the spherical sleeve 25 as the center and the sampling tube 2 as the radius. It should be noted that the range covered by the contraction limit of the sampling tube 2 is excluded.

[0029] The movable tube 21 and the extension tube 22 are tightly fitted, and the spherical sleeve 25 and the spherical cover 12 are tightly fitted, and there is sufficient static friction, so that the relative positions of the movable tube 21 and the extension tube 22 and the spherical sleeve 25 and the spherical cover 12 remain in the original state without the action of external force.

[0030] An exhaust fan 42 is provided at the output end of the air duct 41. The exhaust fan 42 provides power for gas circulation. Air is extracted by the exhaust fan 42 so that the gas is transported from the outer end of the sampling tube 2 to the installation shell 1. The exhaust fan 42 corresponds to the gas sensor 3. An exhaust port is also opened on the outer wall of the installation shell 1. A protective net 16 is provided in the exhaust port. Exhaust is carried out through the exhaust port to ensure the balance of air pressure inside the installation shell 1. Under the protection of the protective net 16, the inside of the installation shell 1 is kept clean.

[0031] Reference Figure 1 , 4 , 6 and 7, the monitoring and early warning device also includes a plurality of buzzer warning lights 6 fixed on the outer wall of the mounting shell 1, the buzzer warning lights 6 are of prior art and contain batteries, which are not shown in the figure, wherein the positive and negative terminals of the buzzer warning lights 6 are in an open circuit state, the buzzer warning lights 6 correspond to the sampling tubes 2 one by one, and the buzzer warning lights 6 are communicatively connected with the gas sensor 3, and a connection structure for controlling the connection state of the buzzer warning lights 6 is provided on the control plug 4, and the positive and negative terminals of the buzzer warning lights 6 can be connected through the connection structure, and the buzzer warning lights 6 can operate normally only after the positive and negative terminals of the buzzer warning lights 6 are connected.

[0032] Reference Figure 1 , 4 , 6 and 7, the connection structure includes a U-shaped conductive rod 43 fixedly arranged on the control plug 4, the conductive rod 43 is located at one side of the input end of the airway 41, so as the control plug 4 rotates, the conductive rod 43 rotates with the control plug 4, a mounting ring 13 is fixedly arranged in the mounting shell 1, and two card slots 14 are opened on the inner wall of the mounting ring 13, the positive and negative wiring terminals of the buzzer warning light 6 are respectively extended to different card slots 14, and the two ends of the conductive rod 43 are respectively fitted with different inner walls of the card slots 14. When the input end of the airway 41 is aligned with the connecting pipe 11, the two ends of the conductive rod 43 are respectively connected to the positive and negative wiring terminals of the buzzer warning light 6 corresponding to the connecting pipe 11, so that the buzzer warning light 6 can work normally. When the gas content in the gas extracted by one of the sampling tubes 2 exceeds the standard, the corresponding buzzer warning light 6 flashes and emits a prompt sound, and the remaining buzzer warning lights 6 are in an open circuit state, so that the gas concentration in the corresponding monitoring area can be grasped.

[0033] The working principle of the utility model is as follows:

[0034] When in use, a hole is drilled at a suitable position of the mine tunnel, and the mounting frame 15 is fixed by an expansion bolt. The angle of the sampling tube 2 is adjusted by rotating the sampling tube 2, and the length of the sampling tube 2 is adjusted by pulling the extension tube 22, so that the conical cover 23 at the end of the sampling tube 2 is located at the center of the monitoring area, and the exhaust fan 42 and the motor 5 are started. The motor 5 drives the control plug 4 to rotate intermittently. Each time the control plug 4 rotates, the airway 41 is connected to one of the connecting tubes 11, and the remaining connecting tubes 11 are in a closed state. The connecting tube 11 in the connected state can take in air into the mounting shell 1, and the exhaust fan 42 is used to exhaust air, so that the gas is transported from the outer end of the sampling tube 2 to the mounting shell 1 and reaches the position of the gas sensor 3 for detection. At the same time, the two ends of the conductive rod 43 are respectively connected to the positive and negative terminals of the buzzer warning light 6 corresponding to the connecting tube 11 in the connected state, so that the buzzer warning light 6 can work normally. When the gas content in the gas extracted by one of the sampling tubes 2 exceeds the standard, the corresponding buzzer warning light 6 flashes and emits a prompt sound, reminding the staff to take measures in time, thereby improving safety.

Claims

1. A mine gas monitoring and early warning device, comprising a mounting shell (1), wherein a gas sensor (3) is arranged in the mounting shell (1), characterized in that: The outer wall of the installation shell (1) is provided with a plurality of connecting tubes (11), the connecting tubes (11) being sealingly and movably connected with a retractable sampling tube (2), the installation shell (1) being provided with a control plug (4) for controlling the connection state between the connecting tubes (11) and the inside of the installation shell (1), a motor (5) being fixedly mounted at the bottom of the installation shell (1), the output end of the motor (5) being coaxially and fixedly connected with the control plug (4), an L-shaped air passage (41) being provided in the control plug (4), the air passage (41) and the connecting tube (11) being at the same horizontal height, when the input end of the air passage (41) is aligned with the connecting tube (11), the connecting tube (11) is connected with the inside of the installation shell (1), an exhaust fan (42) is provided at the output end of the air passage (41), the exhaust fan (42) corresponding to the gas sensor (3), an exhaust port is also provided in the outer wall of the installation shell (1), a protective net (16) is provided in the exhaust port.

2. A mine gas monitoring and early warning device according to claim 1, characterized in that: The sampling tube (2) comprises a movable tube (21), an end of the movable tube (21) away from the connecting tube (11) is provided with an extension tube (22) in a sealing and sliding manner, the end of the extension tube (22) is bent downward and fixedly provided with a conical cover (23), and a filter screen (24) is provided at the opening of the conical cover (23).

3. A mine gas monitoring and early warning device according to claim 2, characterized in that: The outer end of the connecting tube (11) is provided with a spherical cover (12), and the end of the movable tube (21) close to the connecting tube (11) is provided with a spherical sleeve (25), and the spherical cover (12) and the spherical sleeve (25) are sealed and movably connected.

4. A mine gas monitoring and early warning device according to claim 1, characterized in that: It also comprises a plurality of buzzer warning lights (6) fixed to the outer wall of the mounting shell (1), the buzzer warning lights (6) corresponding one to one with the sampling tubes (2), and the buzzer warning lights (6) are communicatively connected to the gas sensor (3), and the control plug (4) is provided with a connection structure for controlling the connection state of the buzzer warning lights (6).

5. A mine gas monitoring and early warning device according to claim 4, characterized in that: The connection structure comprises a U-shaped conductive rod (43) fixedly mounted on the control plug (4), the conductive rod (43) being located on the side where the airway (41) input end is located, a mounting ring (13) being fixedly mounted inside the mounting shell (1), two slots (14) being formed on the inner wall of the mounting ring (13), the positive and negative wiring terminals of the buzzer warning light (6) being respectively extended into different slots (14), and the two ends of the conductive rod (43) being respectively in contact with the inner walls of different slots (14).

6. A mine gas monitoring and early warning device according to claim 1, characterized in that: A C-shaped mounting frame (15) is arranged on the top of the mounting shell (1), a mounting hole is provided on the mounting frame (15), and an expansion bolt is arranged in the mounting hole.

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