Coal mine underground gas concentration monitoring equipment

Abstract

The utility model provides coal mine underground gas concentration monitoring equipment which comprises a conical cover arranged on a columnar sensor of a monitoring alarm body in a sleeving mode, the conical cover is formed by splicing two symmetrical parts, the large end of the conical cover is connected with a filter screen in a clamped mode, the small end of the conical cover is connected with a connecting piece in an inserted mode, and a pressing ring is screwed on the columnar sensor. And the smaller end of the conical cover is pressed on the convex edge of the end part of the columnar sensor by the pressing ring. According to the invention, the conical cover is fixed outside the columnar sensor through the pressing ring, so that adverse effects on monitoring results due to the fact that pulverized coal enters the sensor can be reduced.

Description

Technical Field

[0001] This application relates to the field of gas monitoring technology, and in particular to a gas concentration monitoring device for underground coal mines. Background Technology

[0002] Combustible gas detectors are typically installed in underground coal mines to monitor methane concentration online. If the methane concentration exceeds the standard, the detector will sound an alarm to alert personnel. Methane gas primarily enters through the columnar sensor at the bottom of the detector and is detected. However, coal dust floating in the mine can enter the sensor and affect the accuracy of the monitoring. Therefore, the inventor has proposed a methane concentration monitoring device for underground coal mines. Utility Model Content

[0003] This application provides a coal mine underground gas concentration monitoring device that can reduce the adverse effects on monitoring results caused by coal dust entering the sensor.

[0004] The technical solution of this application is as follows:

[0005] This application provides a coal mine underground gas concentration monitoring device, including a conical cover fitted onto a cylindrical sensor on the main body of the monitoring alarm. The conical cover is formed by splicing two symmetrical parts. A filter screen is snapped into the larger end of the conical cover, and a connector is inserted into the smaller end of the conical cover. A pressure ring is screwed onto the cylindrical sensor, and the pressure ring presses the smaller end of the conical cover onto the protruding edge at the end of the cylindrical sensor.

[0006] By using the technical solution of this application, the conical cover is fixed to the outside of the columnar sensor by a pressure ring, which can reduce the adverse effects on the monitoring results caused by coal dust entering the sensor.

[0007] In some implementations, the inner wall of the larger end of the cone-shaped cover is provided with a slot.

[0008] In some implementations, the slot is constructed as a circle arranged coaxially with the conical cover.

[0009] In some implementations, the filter screen and the conical shroud are arranged coaxially.

[0010] In some implementations, the smaller end of the conical cover has a positioning hole for inserting a connector.

[0011] In some implementations, the positioning holes are symmetrically arranged on both sides of the seam of the conical cover.

[0012] In some implementations, the axis of the positioning hole is parallel to the axis of the conical cover.

[0013] In some implementations, the connector includes an arc-shaped plate and a positioning post fixed to the arc-shaped plate.

[0014] In some implementations, the curved plate and the conical cover are arranged coaxially.

[0015] In some implementations, the pressure ring and the flange are arranged coaxially. Attached Figure Description

[0016] Exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments described below are for illustrative purposes only and are not intended to limit the scope of this application. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of a coal mine underground gas concentration monitoring device according to an embodiment of this application;

[0018] Figure label:

[0019] 10. Monitoring and alarm device main body;

[0020] 20. Columnar sensor; 21. Pressure ring; 22. Raised edge;

[0021] 30. Conical cover; 31. Slot; 32. Filter screen; 33. Positioning hole; 34. Arc plate; 35. Positioning post. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of this application is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0023] In related technologies, combustible gas monitoring alarms are usually installed in coal mines to monitor the gas concentration in the mine online. Once the gas concentration exceeds the standard, the combustible gas monitoring alarm will sound an alarm to alert relevant personnel. The gas mainly enters through the columnar sensor at the bottom of the combustible gas monitoring alarm and is detected by the gas concentration. Coal dust floating in the coal mine can enter the sensor and affect the accuracy of the monitoring.

[0024] This embodiment provides a coal mine underground gas concentration monitoring device, which can reduce the adverse effects on monitoring results caused by coal dust entering the sensor.

[0025] Please see Figure 1In this embodiment, a coal mine underground gas concentration monitoring device includes a conical cover 30 fitted onto a cylindrical sensor 20 on the main body 10 of the monitoring alarm device. The conical cover 30 is formed by splicing two symmetrical parts. A filter screen 32 is snapped onto the larger end of the conical cover 30, and a connector is inserted into the smaller end of the conical cover 30. A pressure ring 21 is screwed onto the cylindrical sensor 20, and the pressure ring 21 presses the smaller end of the conical cover 30 onto the protruding edge 22 at the end of the cylindrical sensor 20.

[0026] By using the technical solution of this embodiment, the conical cover 30 is fixed to the outside of the columnar sensor 20 by the pressure ring 21, which can reduce the adverse effects on the monitoring results caused by coal dust entering the sensor.

[0027] In this embodiment, the conical cover 30 is generally conical in shape, narrower at the top and wider at the bottom, and is formed by splicing two symmetrically arranged parts. A groove 31 is provided on the inner wall of the larger end of the conical cover 30. The groove 31 is constructed to be a circle arranged coaxially with the conical cover 30. The inside of the groove 31 is used to hold the filter screen 32. The filter screen 32 is constructed to be a circle arranged coaxially with the conical cover 30. The filter screen 32 is used to prevent coal dust from entering the interior of the columnar sensor 20.

[0028] In addition, the smaller end of the conical cover 30 is provided with a positioning hole 33 for inserting a connector. The positioning holes 33 are symmetrically arranged on both sides of the splice seam of the conical cover 30, and the axis of the positioning holes 33 is parallel to the axis of the conical cover 30. The connector includes an arc plate 34 and a positioning post 35 fixed on the arc plate 34. The arc plate 34 and the conical cover 30 are arranged coaxially. The positioning post 35 is inserted into the corresponding positioning hole 33. The connector connects the two parts of the conical cover 30 into one piece, so that the conical cover 30 can be disassembled as a whole, so as to facilitate the disassembly of the filter screen 32 and the installation of the conical cover 30 as a whole on the columnar sensor 20.

[0029] Furthermore, the pressure ring 21 and the convex edge 22 are arranged coaxially. The pressure ring 21 is screwed onto the outside of the columnar sensor 20. When the pressure ring 21 is screwed toward the convex edge 22, the pressure ring 21 can press the positioning post 35 of the connector into the positioning hole 33, and press the smaller end of the conical cover 30 onto the convex edge 22 through the connector, thereby connecting the conical cover 30 to the columnar sensor 20.

[0030] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A coal mine underground gas concentration monitoring device, characterized in that, The device includes a conical cover fitted onto a cylindrical sensor on the main body of the monitoring alarm. The conical cover is formed by splicing two symmetrical parts. A filter screen is snapped onto the larger end of the conical cover, and a connector is inserted into the smaller end of the conical cover. A pressure ring is screwed onto the cylindrical sensor, and the pressure ring presses the smaller end of the conical cover against the protruding edge at the end of the cylindrical sensor.

2. The coal mine underground gas concentration monitoring equipment as described in claim 1, characterized in that, The inner wall of the larger end of the conical cover is provided with a slot.

3. The coal mine underground gas concentration monitoring equipment as described in claim 2, characterized in that, The slot is configured as a circle arranged coaxially with the conical cover.

4. The coal mine underground gas concentration monitoring equipment as described in claim 3, characterized in that, The filter screen and the conical cover are arranged coaxially.

5. The coal mine underground gas concentration monitoring equipment as described in claim 4, characterized in that, The smaller end of the conical cover is provided with a positioning hole for inserting the connector.

6. The coal mine underground gas concentration monitoring equipment as described in claim 5, characterized in that, The positioning holes are symmetrically arranged on both sides of the splice seam of the conical cover.

7. The coal mine underground gas concentration monitoring equipment as described in claim 6, characterized in that, The axis of the positioning hole is parallel to the axis of the conical cover.

8. The coal mine underground gas concentration monitoring equipment as described in claim 7, characterized in that, The connector includes an arc-shaped plate and a positioning post fixed to the arc-shaped plate.

9. The coal mine underground gas concentration monitoring equipment as described in claim 8, characterized in that, The arc-shaped plate and the conical cover are arranged coaxially.

10. The coal mine underground gas concentration monitoring equipment as described in claim 9, characterized in that, The pressure ring and the convex edge are arranged coaxially.

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