Laser methane sensor for coal mine

Abstract

The utility model discloses a laser methane sensor for coal mine, which relates to the field of mining equipment, and comprises a protective shell, one surface of the protective shell is provided with a square protruding end, the protruding end is internally provided with a buzzer and a display screen, the two sides of the inner part of the protruding end in the long edge direction are both provided with sliding grooves, and the sliding grooves are arranged in the protective shell. In the actual operation of the methane detection device, external gas can smoothly enter the detection end through the conical opening, whether the content of methane in the gas exceeds the standard or not is detected in real time through the sensing head, and when the air enters the conical opening, the conical opening is arranged, so that the content of the methane in the gas can be detected in real time. The dust in the air can be blocked, and the accumulated dust can automatically slide to the outer side of the detection end through an inclined slope due to the conical arrangement.

Description

Technical Field

[0001] The utility model relates to the field of mining equipment, in particular to a laser methane sensor for coal mines. Background Art

[0002] Methane sensors are used in coal mine safety monitoring systems to continuously monitor methane concentrations in coal mine shafts, mining faces, goafs, return air tunnels, electromechanical chambers, etc.

[0003] Since it is located in a coal mine with high dust content, the sensor is in the air and is easily covered by dust. It is quite troublesome and requires personnel to clean the sensor regularly.

[0004] Therefore, it is necessary to propose a laser methane sensor for coal mines to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a laser methane sensor for coal mines, so as to solve the problem that the dust in the coal mine is large, the sensor is in the air and is easily covered by dust, and personnel need to clean the sensor regularly, which is troublesome.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a laser methane sensor for coal mines, comprising a protective shell, a protruding end is provided on one side of the protective shell, the protruding end is arranged in a square shape, and a buzzer and a display screen are arranged inside the protruding end, sliding grooves are provided on both sides of the long side direction of the inside of the protruding end, a sponge strip is slidably fitted between the two sliding grooves, a connecting end is provided at the bottom end of the protective shell, a detection end is connected to the bottom end of the connecting end, a plurality of detection grooves are provided on the outer circle of the detection end, a tapered mouth is provided inside the plurality of detection grooves, the radius of the outer side of the tapered mouth is greater than the radius of the inner side, the connecting end and the detection end are both arranged in a cylindrical shape, the connecting end is elastic, and a small vibrator is fixed on the inner wall of the detection end.

[0007] Preferably, a circuit board is disposed inside the protective shell, a sensor head is disposed in the hollow interior of the detection end, the top of the sensor head is fixed to the bottom of the connection end, and the sensor head and the circuit board are signal-connected.

[0008] Preferably, inclined blocks are fixed on both sides of the bottom end inside the detection end, and a plurality of leakage holes are arranged below between the two inclined blocks, and the plurality of leakage holes are opened at the bottom end of the detection end.

[0009] Preferably, fixing seats are fixed on both sides of the top of the protective shell, and a lifting handle is rotatably connected between the two fixing seats.

[0010] Preferably, L-shaped moving blocks are fixed to both ends of the sponge strip, the two L-shaped moving blocks extend out of the corresponding sliding grooves, and the two L-shaped moving blocks are slidably matched with the two sides of the protective shell.

[0011] Preferably, warning lights are provided on both sides of the detection end, and the two warning lights are fixed to the bottom end of the protective shell.

[0012] Technical effects and advantages of the utility model:

[0013] 1. In the actual operation of the utility model, by setting the conical mouth, the external gas can smoothly enter the interior of the detection end, and the sensor head detects whether the methane content in the gas exceeds the standard in real time. When the air enters the interior of the conical mouth, the setting of the conical mouth can block the dust in the air, and the conical setting can allow the accumulated dust to automatically slide down to the outside of the detection end through the inclined slope. If some dust enters the interior of the detection end, the dust will fall between the two inclined blocks until it is discharged from the leak hole. At the same time, the small vibrator is started, which can drive the detection end to vibrate slightly and speed up the discharge of dust. The connecting end has a certain elasticity, which can reduce the impact of vibration on the protective shell.

[0014] 2. In the actual operation of the utility model, the protective shell is installed at the position that needs to be detected. Since there is a lot of dust in the coal mine, personnel can regularly push the L-shaped moving block downward to make the L-shaped moving block drive the sponge bar to slide, thereby wiping the buzzer and the display screen to avoid dust accumulation and affect the use. When the hand is released, the L-shaped moving block loses thrust and automatically drives the sponge bar to slide downward and wipe again until it slides to the bottom of the protruding end without affecting the use of the buzzer and the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the structure of a laser methane sensor for coal mines.

[0016] Figure 2 It is a structural schematic diagram of the sensor head of the utility model.

[0017] In the figure: 1. Protective shell; 2. Fixed seat; 3. Lifting handle; 4. Protruding end; 5. Moving block; 6. Sliding groove; 7. Sponge strip; 8. Buzzer; 9. Display screen; 10. Connecting end; 11. Detection end; 12. Detection groove; 13. Warning light; 14. Conical mouth; 15. Sensor head; 16. Small vibrator; 17. Tilting block; 18. Leak hole. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clarify the technical solutions in the embodiments of the utility model; it is completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] The utility model provides Figure 1 - Figure 2 A laser methane sensor for coal mines shown in the figure includes a protective shell 1, a protruding end 4 is provided on one side of the protective shell 1, the protruding end 4 is set in a square shape, and a buzzer 8 and a display screen 9 are provided inside the protruding end 4, sliding grooves 6 are opened on both sides of the long side direction of the inside of the protruding end 4, a sponge strip 7 is slidably fitted between the two sliding grooves 6, L-shaped moving blocks 5 are fixed at both ends of the sponge strip 7, the two L-shaped moving blocks 5 extend out of the corresponding sliding grooves 6, and the two L-shaped moving blocks 5 are slidably fitted on both sides of the protective shell 1.

[0020] In the actual operation of the utility model, the protective shell 1 is installed at the position that needs to be detected. Due to the large amount of dust in the coal mine, personnel can regularly push the L-shaped moving block 5 downward to make the L-shaped moving block 5 drive the sponge bar 7 to slide, thereby wiping the buzzer 8 and the display screen 9 to avoid dust accumulation and affect the use. When the hand is released, the L-shaped moving block 5 loses thrust and automatically drives the sponge bar 7 to slide downward and wipe again until it slides to the bottom end inside the protruding end 4, and will not affect the use of the buzzer 8 and the display screen 9.

[0021] A connecting end 10 is provided at the bottom end of the protective shell 1, and a detecting end 11 is connected to the bottom end of the connecting end 10. A plurality of detecting grooves 12 are provided on the outer circle of the detecting end 11, and a conical mouth 14 is provided inside the plurality of detecting grooves 12. The radius of the outer side of the conical mouth 14 is greater than the radius of the inner side. Both the connecting end 10 and the detecting end 11 are configured to be cylindrical, and the connecting end 10 is elastic. A small vibrator 16 is fixed on the inner wall of the detecting end 11.

[0022] A circuit board is arranged inside the protective shell 1, and a sensor head 15 is arranged in the hollow inside the detection end 11. The top of the sensor head 15 is fixed to the bottom of the connection end 10, and the sensor head 15 is connected to the circuit board signal. The circuit board is composed of a power supply circuit, a methane detection circuit, an infrared remote control receiving circuit, a single-chip microcomputer circuit, a display circuit and a communication circuit. It takes a low-power single-chip microcomputer as the core, and realizes real-time measurement and display of methane through a laser sensitive element. When the methane concentration reaches the set alarm value, an audible and visual alarm is issued. The sensor can also simultaneously detect parameters such as the alarm value, the sensor address and the self-check point. Alarm lights 13 are arranged on both sides of the detection end 11, and the two alarm lights 13 are fixed to the bottom of the protective shell 1. Specifically, the alarm is issued by the alarm light 13 and the buzzer 8.

[0023] Tilted blocks 17 are fixed on both sides of the bottom end of the detection end 11, and multiple leakage holes 18 are arranged below the two tilted blocks 17. Multiple leakage holes 18 are opened at the bottom of the detection end 11. Fixed seats 2 are fixed on both sides of the top of the protective shell 1, and a lifting handle 3 is rotatably connected between the two fixed seats 2.

[0024] In the actual operation of the utility model, by setting the conical mouth 14, the external gas can smoothly enter the interior of the detection end 11, and the sensor head 15 detects whether the methane content in the gas exceeds the standard in real time. When the air enters the interior of the conical mouth 14, the setting of the conical mouth 14 can block the dust in the air, and the conical setting can allow the accumulated dust to automatically slide down to the outside of the detection end 11 through the inclined slope. If some dust enters the interior of the detection end 11, the dust will fall between the two inclined blocks 17 until it is discharged from the leak hole 18. At the same time, the small vibrator 16 is started, which can drive the detection end 11 to vibrate slightly and accelerate the discharge of dust. In addition, the connection end 10 has a certain elasticity, which can reduce the impact of vibration on the protective shell 1.

[0025] A filter screen may be provided at the connection point between the conical opening 14 and the inside of the detection end 11 to enhance the dust prevention effect.

Claims

1. A laser methane sensor for coal mines, comprising a protective housing (1), characterized in that: A protruding end (4) is provided on one side of the protective shell (1), the protruding end (4) is arranged in a square shape, and a buzzer (8) and a display screen (9) are arranged inside the protruding end (4), sliding grooves (6) are provided on both sides of the long side direction of the inside of the protruding end (4), and a sponge strip (7) is slidably fitted between the two sliding grooves (6), a connecting end (10) is provided at the bottom end of the protective shell (1), and the bottom end of the connecting end (10) is connected to a detection end (11), the outer circle of the detection end (11) is provided with a plurality of detection grooves (12), and a conical mouth (14) is arranged inside the plurality of detection grooves (12), and the outer radius of the conical mouth (14) is greater than the inner radius, the connecting end (10) and the detection end (11) are both arranged in a cylindrical shape, the connecting end (10) is elastic, and a small vibrator (16) is fixed on the inner wall of the detection end (11).

2. A laser methane sensor for coal mine according to claim 1, characterized in that: A circuit board is arranged inside the protective shell (1), a sensor head (15) is arranged in the hollow space inside the detection end (11), the top end of the sensor head (15) is fixed to the bottom of the connection end (10), and the sensor head (15) is signal-connected to the circuit board.

3. A laser methane sensor for coal mine according to claim 1, characterized in that: Inclined blocks (17) are fixed on both sides of the bottom end of the detection end (11), and a plurality of leakage holes (18) are arranged below the two inclined blocks (17). The plurality of leakage holes (18) are opened at the bottom end of the detection end (11).

4. The laser methane sensor for coal mine according to claim 1, characterized in that: Fixed seats (2) are fixed on both sides of the top of the protective shell (1), and a lifting handle (3) is rotatably connected between the two fixed seats (2).

5. The laser methane sensor for coal mine according to claim 1, characterized in that: L-shaped moving blocks (5) are fixed to both ends of the sponge strip (7), the two L-shaped moving blocks (5) extend out of corresponding sliding grooves (6), and the two L-shaped moving blocks (5) are slidably matched on both sides of the protective shell (1).

6. The laser methane sensor for coal mine according to claim 1, characterized in that: Warning lights (13) are provided on both sides of the detection end (11), and the two warning lights (13) are fixed to the bottom end of the protective shell (1).

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