Self-cleaning device for coal mine underground dust sensor

Abstract

The utility model relates to a coal mine underground dust sensor self-cleaning device which comprises a supporting frame, a dust sensor and a cleaning mechanism and is characterized in that the dust sensor is fixed on the side face of the supporting frame, the center line of the dust sensor is parallel to the horizontal plane, and a longitudinal linear module is fixed on the upper surface of the supporting frame. A sliding block of the longitudinal linear module is connected with a right-angle supporting plate, a horizontal section of the right-angle supporting plate is connected with the sliding block, a pressurizer is fixed to the upper surface of the right-angle supporting plate, an inlet of the pressurizer is connected with an induced draft fan, and a filter screen is arranged at an inlet of the induced draft fan. And a nozzle of the spray head assembly is arranged opposite to a detection port of the dust sensor in the horizontal direction. The device is good in cleaning effect, and meanwhile it is guaranteed that the detection range of the dust sensor is wider.

Description

Technical Field

[0001] This utility model relates to a dust sensor cleaning device, specifically a self-cleaning device for a dust sensor in underground coal mines. Background Technology

[0002] In underground coal mine production, dust sensors are typically used to monitor dust concentration in the underground environment to ensure production safety. However, because the dust sensors operate in environments with high dust concentrations, dust particles accumulate on the surfaces of the sensor's laser emitter and receiver after a period of operation, affecting monitoring accuracy. Therefore, regular cleaning of the dust sensors is necessary.

[0003] CN 216791961 U discloses a laser dust sensor with self-cleaning function, comprising a housing with a detection cavity. The detection cavity is connected to the outside through an air inlet channel and an air outlet channel. A suction device is installed in the air outlet channel and / or the air inlet channel. A laser emitting device and a photodetector are installed inside the housing. The sensor also includes two cleaning devices, one on the side of the laser emitting device and the other on the side facing the detection cavity. These two cleaning devices are used to clean dust deposited on the surfaces of the laser emitting device and the photodetector. This patent aims to automatically clean dust deposited on the surfaces of the laser emitting device and the photodetector, ensuring measurement accuracy. However, the following problems still exist: 1. It can only detect the dust concentration in the gas entering the detection cavity, which is limited by the detection cavity, resulting in a narrow detection range; 2. It uses a dust scraper to clean dust deposited on the surface of the laser emitting device or the photodetector, but during its return stroke, some dust tends to adhere to the surface being wiped, making it difficult to remove completely and resulting in poor cleaning effect. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning device for underground coal mine dust sensors that has a reasonable structure and reliable operation, solves the above-mentioned problems, has a good cleaning effect, and ensures a wider detection range for the dust sensors.

[0005] The technical solution of this utility model is:

[0006] A self-cleaning device for a dust sensor in a coal mine includes a support frame, a dust sensor, and a cleaning mechanism. The key technical features are as follows: the dust sensor is fixed to the side of the support frame with its centerline parallel to the horizontal plane; a longitudinal linear module is fixed to the upper surface of the support frame; the slider of the longitudinal linear module is connected to a right-angle support plate; the horizontal section of the right-angle support plate is connected to the slider, and a pressure device is fixed to its upper surface; the inlet of the pressure device is connected to an induced draft fan, and the inlet of the induced draft fan is equipped with a filter screen; a nozzle assembly is fixed to the lower part of the vertical section of the right-angle support plate; the nozzle nozzle is horizontally aligned with the detection port of the dust sensor; a compressed gas pipeline connects the inlet of the nozzle assembly to the outlet of the pressure device; a protective sleeve is provided around the nozzle assembly on the vertical section; a sliding sleeve is provided on the outer side of the protective sleeve; a horizontal electric push rod is also provided on the vertical section; the front end of the telescopic section of the horizontal electric push rod is connected and fixed to the outer wall of the sliding sleeve; and multiple U-shaped notches are evenly distributed at the front end of the sliding sleeve.

[0007] The aforementioned self-cleaning device for underground dust sensors in coal mines comprises a main cavity, multiple nozzles located on the front end of the main cavity, and an inlet located on the rear end of the main cavity, with each nozzle evenly arranged around the center of the main cavity.

[0008] In the aforementioned self-cleaning device for underground dust sensors in coal mines, a first inclined tie plate is provided between the horizontal section of the right-angle support plate and the slider, and a second inclined tie plate is provided between the upper part of the horizontal section and the vertical section of the right-angle support plate.

[0009] The aforementioned self-cleaning device for underground coal mine dust sensors has a filter screen composed of an activated carbon filter layer and a fiber filter layer. It performs fine filtration on the introduced underground air, removing impurities, moisture, and tiny coal dust particles to ensure the cleanliness of the gas used for purging.

[0010] The beneficial effects of this utility model are:

[0011] 1. When in operation, the dust sensor is not constrained by the housing, allowing for a longer and wider detection range.

[0012] 2. Excellent cleaning effect: When cleaning is required, the longitudinal linear module is activated, and the slider drives the right-angle support plate downward, aligning the nozzle assembly with the detection port of the dust sensor. Then, the horizontal electric push rod pushes the sliding sleeve so that its front end contacts the front side wall of the dust sensor. Finally, the exhaust fan and pressurizer are activated, so that the outside air is filtered by the filter screen, pressurized, and sprayed through the nozzle assembly onto the detection port of the dust sensor, removing the dust on the surface of the detection port. The dust is discharged through the various U-shaped notches of the sliding sleeve. The sliding sleeve restricts the dust blowing range and the dust discharge direction, preventing large-scale dust in the detection environment and ensuring excellent cleaning effect. Attached Figure Description

[0013] Figure 1 Here is a schematic diagram of the structure of this utility model:

[0014] Figure 2 yes Figure 1 Side view;

[0015] Figure 3 This is a schematic diagram of the state to be cleaned in this utility model;

[0016] Figure 4 This is a schematic diagram of the clean state of this utility model.

[0017] In the diagram: 1. Longitudinal linear module, 2. Filter screen, 3. Exhaust fan, 4. Pressure booster, 5. Right-angle support plate, 6. Compressed gas pipeline, 7. Slider, 8. First diagonal tie plate, 9. Second diagonal tie plate, 10. Sliding sleeve, 11. Horizontal electric push rod, 12. Sheath, 13. Nozzle assembly, 14. Dust sensor, 15. Support frame, 16. U-shaped notch. Detailed Implementation

[0018] The present invention will be described in detail with reference to the accompanying drawings.

[0019] like Figures 1-4 As shown, the self-cleaning device for underground dust sensors in coal mines includes a support frame 15, a dust sensor 14, and a cleaning mechanism.

[0020] The dust sensor 14 is fixed to the side of the support frame 15, and its centerline is parallel to the horizontal plane. A longitudinal linear module 1 is fixed to the upper surface of the support frame 15, and the slider 7 of the longitudinal linear module 1 is connected to the right-angle support plate 5. In this embodiment, a first diagonal bracing plate 8 is provided between the horizontal section of the right-angle support plate 5 and the slider 7, and a second diagonal bracing plate 9 is provided between the upper part of the horizontal section and the vertical section of the right-angle support plate 5.

[0021] The horizontal section of the right-angle support plate 5 is connected to the slider 7 and a pressure booster 4 is fixed on its upper surface. The inlet of the pressure booster 4 is connected to the induced draft fan 3 and the inlet of the induced draft fan 3 is equipped with a filter screen 2. The filter screen 2 is composed of an activated carbon filter layer and a fiber filter layer, which finely filters the introduced underground air to remove impurities, moisture and tiny coal dust particles, ensuring that the gas used for purging is clean.

[0022] A nozzle assembly 13 is fixed to the lower part of the vertical section of the right-angle support plate 5. The nozzle of the nozzle assembly 13 is arranged horizontally opposite to the detection port of the dust sensor 14. A compressed gas pipeline 6 is connected between the inlet of the nozzle assembly 13 and the outlet of the pressurizer 4. In this embodiment, the nozzle assembly 13 consists of a main cavity, multiple nozzles located on the front end face of the main cavity, and an inlet located on the rear end face of the main cavity. The nozzles are evenly arranged around the center of the main cavity.

[0023] The vertical section is provided with a protective sleeve 12 on the outer periphery of the nozzle assembly 13. A sliding sleeve 10 is provided on the outer side of the protective sleeve 12. A horizontal electric push rod 11 is also provided on the vertical section. The front end of the telescopic section of the horizontal electric push rod 11 is connected and fixed to the outer wall of the sliding sleeve 10. The front end of the sliding sleeve 10 is provided with a plurality of U-shaped notches 16 evenly.

[0024] Working principle:

[0025] 1. Start the longitudinal linear module 1. The slider 7 drives the right-angle support plate 5 and its upper components to move down synchronously, so that the nozzle assembly 13 is aligned with the detection port of the dust sensor 14.

[0026] 2. Use the horizontal electric push rod 11 to push the sliding sleeve 10 and make its front end contact the front side wall of the dust sensor 14. The sliding sleeve 10 wraps around the outside of the detection port of the dust sensor 14.

[0027] 3. Start the induced draft fan 3 and the pressurizer 4 so that the underground gas is filtered by the filter screen 2, then pressurized by the pressurizer 4 and sprayed through the nozzle assembly 13 to the detection port of the dust sensor 14 to remove the dust on the surface of the detection port. The dust is discharged through the various U-shaped notches 16 of the sliding sleeve 10 until the cleaning is completed.

[0028] 4. After cleaning, all components are reset, and dust sensor 14 will operate normally.

[0029] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A self-cleaning device for a dust sensor in an underground coal mine, comprising a support frame, a dust sensor, and a cleaning mechanism, characterized in that: The dust sensor is fixed to the side of the support frame with its centerline parallel to the horizontal plane. A longitudinal linear module is fixed to the upper surface of the support frame. The slider of the longitudinal linear module is connected to a right-angle support plate. The horizontal section of the right-angle support plate is connected to the slider, and a pressure booster is fixed to its upper surface. The inlet of the pressure booster is connected to an induced draft fan, and the inlet of the induced draft fan is equipped with a filter screen. A nozzle assembly is fixed to the lower part of the vertical section of the right-angle support plate. The nozzle of the nozzle assembly is arranged horizontally opposite to the detection port of the dust sensor. A compressed gas pipeline is connected between the inlet of the nozzle assembly and the outlet of the pressure booster. A protective sleeve is provided on the outer periphery of the nozzle assembly on the vertical section. A sliding sleeve is provided on the outer side of the protective sleeve. A horizontal electric push rod is also provided on the vertical section. The front end of the telescopic section of the horizontal electric push rod is connected and fixed to the outer wall of the sliding sleeve. The front end of the sliding sleeve is evenly provided with multiple U-shaped notches.

2. The self-cleaning device for underground dust sensors in coal mines according to claim 1, characterized in that: The nozzle assembly consists of a main cavity, multiple nozzles located on the front end of the main cavity, and an inlet located on the rear end of the main cavity. Each nozzle is evenly arranged around the center of the main cavity.

3. The self-cleaning device for underground dust sensors in coal mines according to claim 1, characterized in that: A first diagonal bracing plate is provided between the horizontal section of the right-angle support plate and the slider, and a second diagonal bracing plate is provided between the upper part of the horizontal section and the vertical section of the right-angle support plate.

4. The self-cleaning device for underground dust sensors in coal mines according to claim 1, characterized in that: The filter screen consists of an activated carbon filter layer and a fiber filter layer.

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