A laser sensor for detecting carbon monoxide in mining

Abstract

This utility model discloses a laser-based carbon monoxide sensor for mining applications, comprising a housing and a backplate. The connection between the housing and the backplate is stepped, and a sealing gasket that mates with the connection is positioned between the housing and the backplate. The backplate is connected to the housing via bolts. A pressing component is positioned beside the sealing gasket on the housing to press the sealing gasket against the backplate. This utility model, through the stepped connection between the housing and the backplate and the sealing gasket, and the pressing component that presses the sealing gasket against the backplate, effectively solves the problem of poor sealing at the connection between the housing and the backplate in traditional sensors. It enhances the sensor's sealing performance, preventing harmful substances such as dust and moisture from entering the sensor, ensuring stable operation of the internal circuitry, and extending the sensor's lifespan.

Description

Technical Field

[0001] This utility model relates to a laser sensor for detecting carbon monoxide in mining applications. Background Technology

[0002] In mining environments such as coal mines, carbon monoxide is a common harmful gas, and accurate detection of its concentration is crucial for ensuring the safety of miners' lives and the safety of mine production.

[0003] Traditional sensors often have poor sealing at the connection between the outer shell and the backplate, making them susceptible to damage from the complex and harsh environment inside mines, such as dust and moisture. This can affect the normal operation and lifespan of the sensor.

[0004] Therefore, a laser sensor for detecting carbon monoxide in mining is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a laser carbon monoxide sensor for mining, which solves the problem mentioned in the background art that the sealing effect at the connection between the outer shell and the back plate of traditional sensors is poor, and the internal circuit is easily damaged due to the complex and harsh environment in the mine, thus affecting the normal operation and service life of the sensor.

[0006] To solve the above technical problems, the present invention provides the following technical solution: a mining laser carbon monoxide sensor, comprising a housing and a back plate of a carbon monoxide sensor device, wherein the connection end between the housing and the back plate is stepped, and a sealing gasket that mates with the connection end is provided between the housing and the back plate, and the back plate is connected to the housing by bolts. The outer casing is provided with a compression assembly next to the sealing gasket, so that the compression assembly can compress the sealing gasket toward the back plate side.

[0007] Preferably, the extrusion assembly includes an elastic cavity located on the side of the outer shell, a limiting plate is slidably connected inside the elastic cavity, and the limiting plate is connected to a sealing gasket via an extrusion plate away from the elastic cavity, the extrusion plate having an inverted funnel-shaped cross-section.

[0008] Preferably, the elastic cavity is provided with multiple sets of return springs, and the return springs are located at the upper end of the limiting plate, so that the compression plate connected to the limiting plate can move elastically on the elastic cavity side through the return springs.

[0009] Preferably, the sealing gasket includes a head gasket, a middle gasket, and a tail gasket, which are connected sequentially, and the combined shape of the head gasket, middle gasket, and tail gasket is stepped, so that the sealing gasket fits to the connection end between the outer shell and the back plate.

[0010] Preferably, the first gasket includes a first rubber gasket located on the side of the extrusion plate, the first rubber gasket is provided with a sealing section on the inner wall side of the outer shell, the sealing section has an inverted trapezoidal cross-sectional shape, and an airbag is provided on the side of the first gasket next to the sealing section. The central padding includes a second rubber pad arranged vertically, and the side of the second rubber pad that is attached to the back panel has multiple sets of triangular protrusions. The tail liner includes a third rubber pad arranged in an "L" shape, and an air cushion is provided at the third rubber pad. The airbag and the air cushion are connected by an air passage, and the air passage is located inside the second rubber pad.

[0011] The back plate has sealing grooves and concave grooves on the front and rear pad sides, respectively, which cooperate with the sealing section and the air cushion, so that the back plate is squeezed to the sealing section and the air cushion side.

[0012] Preferably, a circuit board is provided inside the outer casing. The circuit board includes a controller, a detection module, an alarm module, a communication module, and a display module, which are connected to the controller.

[0013] Preferably, the detection module includes a detection chamber disposed at the lower part of the back plate, and a laser is disposed at the detection chamber so that the laser transmits a laser signal into the detection chamber, and the laser signal is received by a photodetector and converted into an electrical signal.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention effectively solves the problem of poor sealing at the connection between the outer shell and the back plate in traditional sensors. It utilizes a stepped connection between the outer shell and the back plate, along with a sealing gasket and a pressing assembly to press the gasket against the back plate. This multi-faceted sealing structure enhances the sensor's sealing performance, preventing harmful substances such as dust and moisture from entering the sensor, ensuring stable operation of the internal circuitry, extending the sensor's lifespan, and improving the reliability of underground monitoring.

[0015] In response to the complex and harsh environment inside mines, this sealing design can better resist the erosion of dust and moisture, ensuring that the sensor can still maintain good working condition after long-term use, and providing continuous and reliable monitoring data for mine safety.

[0016] Compared with traditional structures, the sealing structure design of this utility model is more reasonable and stable, avoiding damage to the internal circuitry due to poor sealing, thereby improving the reliability of the entire sensor device. In mine environments where equipment reliability is extremely important, it can reduce the failure rate and number of repairs of sensors, lower maintenance costs, ensure continuous monitoring during mine production, and provide strong technical support for safe mine production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the bottom structure of an embodiment of the present utility model; Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 3 This is an enlarged schematic diagram of the structure at point A in an embodiment of this utility model; Figure 4 This is a schematic diagram of the sealing gasket structure according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the upper structure of an embodiment of the present utility model.

[0018] In the diagram: 1. Outer shell; 2. Back plate; 21. Sealing groove; 22. Recessed groove; 3. Sealing gasket; 31. Head gasket; 311. First rubber gasket; 312. Sealing section; 313. Airbag; 32. Middle gasket; 321. Second rubber gasket; 322. Protrusion; 323. Air passage; 33. Tail gasket; 331. Third rubber gasket; 332. Air cushion; 4. Extrusion assembly; 41. Elastic cavity; 42. Limiting plate; 43. Extrusion plate; 44. Return spring; 5. Circuit board; 6. Detection air chamber; 7. Laser. Detailed Implementation

[0019] To address the problem of poor sealing at the connection between the outer shell and backplate of traditional sensors, which can easily damage internal circuitry due to the complex and harsh environment of mines, thus affecting the normal operation and lifespan of the sensor, this utility model provides a mine-use laser carbon monoxide detection sensor. The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Please see Figure 1-5This utility model provides a carbon monoxide sensor for mining using laser detection, including a housing 1 and a back plate 2 for the carbon monoxide sensor device. The connection end between the housing 1 and the back plate 2 is stepped. A sealing gasket 3 is provided between the housing 1 and the back plate 2 to cooperate with the connection end. The sealing gasket 3 includes a head gasket 31, a middle gasket 32 ​​and a tail gasket 33. The head gasket 31, the middle gasket 32 ​​and the tail gasket 33 are connected sequentially, and the combined shape of the head gasket 31, the middle gasket 32 ​​and the tail gasket 33 is stepped, so that the sealing gasket 3 fits to the connection end between the housing 1 and the back plate 2. The first pad 31 includes a first rubber pad 311 located on the side of the extrusion plate 43. The first rubber pad 311 has a sealing section 312 on the inner wall side of the outer shell 1. The cross-sectional shape of the sealing section 312 is an inverted trapezoid. An airbag 313 is provided on the side of the first pad next to the sealing section 312. The middle pad 32 includes a second rubber pad 321 arranged vertically. The second rubber pad 321 has multiple sets of triangular protrusions 322 on the side that adheres to the back plate 2. The tail pad 33 includes a third rubber pad 331 arranged in an "L" shape. An airbag 332 is provided at the third rubber pad 331. The airbag 313 and the airbag 332 are connected by an air passage 323, and the air passage 323 is located inside the second rubber pad 321.

[0021] The back plate 2 is connected to the outer shell 1 by bolts to the sealing gasket 3; A compression assembly 4 is disposed beside the sealing gasket 3 on the outer shell 1. The compression assembly 4 includes an elastic cavity 41 located on the side of the outer shell 1. A limiting plate 42 is slidably connected inside the elastic cavity 41. The limiting plate 42, away from the elastic cavity 41, is connected to the sealing gasket 3 via a compression plate 43. The compression plate 43 has an inverted funnel-shaped cross-section. Multiple sets of return springs 44 are disposed inside the elastic cavity 41, and the return springs 44 are located at the upper end of the limiting plate 42, so that the compression plate 43 and the limiting plate 42 can move elastically on the side of the elastic cavity 41 via the return springs 44. This allows the compression assembly 4 to compress the sealing gasket 3 towards the back plate 2.

[0022] The back plate 2 has sealing grooves 21 and concave grooves 22 on the front pad 31 and rear pad 33 sides, respectively, which cooperate with the sealing section 312 and air cushion 332, so that the back plate 2 is squeezed to the sealing section 312 and air cushion 332 sides.

[0023] The outer casing 1 houses a circuit board 5, which includes a controller, a detection module, an alarm module, a communication module, and a display module. These modules are connected to the controller. The detection module includes a detection chamber 6 located at the lower part of the back panel 2. A laser 7 is positioned within the detection chamber 6 to transmit laser signals into it. A photodetector receives the laser signals and converts them into electrical signals.

[0024] The working principle of the mining laser carbon monoxide detection sensor provided by this utility model is as follows: During assembly, the sealing gasket 3 is placed between the outer shell 1 and the back plate 2. Its shape matches the stepped connection end of the outer shell 1 and the back plate 2, thus playing a preliminary sealing role.

[0025] When the back plate 2 is tightened toward the outer shell 1 by bolts, the outer shell 1 and the back plate 2 are relatively close, and the compression assembly 4 begins to function.

[0026] The extrusion plate 43 is subjected to extrusion forces from the back plate 2 and the outer shell 1. The extrusion plate 43 drives the limiting plate 42 to slide inside the elastic cavity 41. At this time, the return spring 44 is compressed (the return spring 44 can offset some of the effects of changes in the performance of the sealing gasket 3 caused by factors such as temperature changes and material aging, and maintain the tight fit between the sealing gasket 3 and the connection end between the outer shell 1 and the back plate 2, thereby ensuring the stability of the entire sensor seal). The cross-section of the extrusion plate 43 is an inverted funnel shape, which allows the extrusion plate 43 to evenly transmit the extrusion force to the sealing gasket 3. Under the action of the extrusion force, the sealing gasket 3 is further compressed and adheres to the back plate 2 side.

[0027] When the sealing gasket 3 is compressed, its head gasket 31, middle gasket 32 ​​and tail gasket 33 are tightly fitted to the connection ends of the outer shell 1 and the back plate 2, respectively.

[0028] The sealing section 312 of the head gasket 31 engages with the sealing groove 21 of the back plate 2. Under the action of compressive force, the sealing section 312 is pressed towards the back plate 2 and gradually enters the sealing groove 21. Because the sealing section 312 is an inverted trapezoidal shape, its structure, which is wider at the bottom and narrower at the top, allows it to fit tightly against the side wall of the sealing groove 21 during its entry into the sealing groove 21. As the bolts are further tightened, the compressive force continues to increase, and the fit between the sealing section 312 and the sealing groove 21 becomes even tighter, thus forming a good sealing interface.

[0029] The air cushion 332 of the tail pad 33 cooperates with the concave groove 22 of the back plate 2. Under the compression action, the gas inside the air bag 313 is output to the air cushion 332 through the air passage 323, which fully compresses the air cushion 332 into the concave groove 22. The elastic deformation of the air cushion 332 can fill the tiny gaps that may exist between it and the concave groove 22, thereby effectively preventing harmful substances such as dust and moisture from the outside from entering the sensor from the tail end of the connection between the outer shell 1 and the back plate 2.

[0030] The triangular protrusions 322 of the central pad 32 fit against the sides of the back plate 2. Under the action of extrusion force, the triangular protrusions 322 are tightly fitted to the surface of the back plate 2, forming a good sealing interface; in summary, a multi-layer sealing structure is formed.

[0031] When external dust or moisture attempts to enter the sensor, these sealing structures effectively block its intrusion, thus achieving a good sealing effect and protecting the internal circuitry from damage.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser sensor for detecting carbon monoxide in mining, characterized in that: The device includes a housing (1) and a back plate (2) for a carbon monoxide sensor. The connection end between the housing (1) and the back plate (2) is stepped. A sealing gasket (3) that mates with the connection end is provided between the housing (1) and the back plate (2). The back plate (2) is connected to the housing (1) by bolts to the sealing gasket (3). The outer shell (1) is provided with a compression assembly (4) on the side of the sealing gasket (3) so that the compression assembly (4) compresses the sealing gasket (3) toward the back plate (2).

2. The mine-use laser carbon monoxide detection sensor according to claim 1, characterized in that: The extrusion assembly (4) includes an elastic cavity (41) located on the side of the outer shell (1). A limiting plate (42) is slidably connected inside the elastic cavity (41). The limiting plate (42) is connected to the sealing gasket (3) away from the elastic cavity (41) through an extrusion plate (43). The cross-sectional shape of the extrusion plate (43) is an inverted funnel shape.

3. A mining laser carbon monoxide detection sensor according to claim 2, characterized in that: Multiple sets of reset springs (44) are provided inside the elastic cavity (41), and the reset springs (44) are located at the upper end of the limiting plate (42) so that the pressing plate (43) connected to the limiting plate (42) can move elastically on the side of the elastic cavity (41) through the reset springs (44).

4. A mining laser carbon monoxide detection sensor according to claim 3, characterized in that: The sealing gasket (3) includes a head gasket (31), a middle gasket (32) and a tail gasket (33), which are connected sequentially. The combined shape of the head gasket (31), the middle gasket (32) and the tail gasket (33) is stepped, so that the sealing gasket (3) fits to the connection end between the outer shell (1) and the back plate (2).

5. A mining laser carbon monoxide detection sensor according to claim 4, characterized in that: The head gasket (31) includes a first rubber gasket (311) located on the side of the extrusion plate (43). The first rubber gasket (311) is provided with a sealing section (312) on the inner wall side of the outer shell (1). The cross-sectional shape of the sealing section (312) is an inverted trapezoidal shape. An airbag (313) is provided on the side of the first rubber gasket (311) next to the sealing section (312). The middle pad (32) includes a second rubber pad (321) arranged vertically, and the second rubber pad (321) has multiple sets of triangular protrusions (322) on the side of the back plate (2). The tail pad (33) includes a third rubber pad (331) arranged in an "L" shape, and an air cushion (332) is provided at the third rubber pad (331). The airbag (313) and the air cushion (332) are connected by an air passage (323), and the air passage (323) is located inside the second rubber pad (321).

6. A mining laser carbon monoxide detection sensor according to claim 5, characterized in that: The back plate (2) has sealing grooves (21) and concave grooves (22) respectively on the front pad (31) and tail pad (33) sides, which cooperate with the sealing section (312) and air cushion (332) so that the back plate (2) is squeezed to the sealing section (312) and air cushion (332) sides.

7. A mining laser carbon monoxide detection sensor according to claim 1, characterized in that: The outer casing (1) is equipped with a circuit board (5), which includes a controller, a detection module, an alarm module, a communication module and a display module. The detection module, alarm module, communication module and display module are connected to the controller.

8. A mining laser carbon monoxide detection sensor according to claim 7, characterized in that: The detection module includes a detection chamber (6) located at the lower part of the back plate (2), and a laser (7) is provided at the detection chamber (6) so that the laser (7) transmits the laser signal to the detection chamber (6), and receives the laser signal through a photodetector and converts it into an electrical signal.

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