Coal conveying early warning device

Abstract

The utility model provides a coal conveying early warning device, and belongs to the technical field of gas monitoring. The coal conveying early warning device comprises a gas monitor body, an air draft mechanism and a reversing valve, an air outlet of the air draft mechanism is communicated with the gas monitor body through the reversing valve, an air inlet of the air draft mechanism is fixedly communicated with a header pipe, the header pipe is arranged along a coal conveying line, air inlet valves are arranged on the header pipe in an axial array mode, and the air inlet valves are communicated with the reversing valve. A translation mechanism is arranged in the header pipe, and abutting wheels are arranged on the translation mechanism. The gas monitor has the advantages that the translation mechanism drives the abutting wheels to move along the main pipe, the air inlet valves are sequentially opened, the air draft mechanism exhausts air in a to-be-detected area to the outside through the current air inlet valve, the main pipe and the air draft mechanism are filled with to-be-detected gas, then the air draft mechanism is communicated with the gas monitor body through the reversing valve, and the gas monitor body is closed. And the process is repeated, so that cyclic measurement of a plurality of monitoring points by one gas monitor body is realized, and the input cost and the maintenance cost are reduced.

Description

Technical Field

[0001] This application relates to the field of gas monitoring technology, and more specifically, to a coal conveying early warning device. Background Technology

[0002] When coal is transported in the coal corridor, the concentration of harmful gases needs to be monitored at all times. Due to the long length of the corridor, a gas monitor needs to be installed at intervals. When the gas monitor detects that the concentration exceeds the standard, the central control system will take emergency measures according to the degree of exceedance, such as issuing warnings, activating forced ventilation, shutting down equipment, and spraying dust suppression and inerting. A large number of gas monitors increases the investment cost and is also not conducive to timely maintenance and calibration. Utility Model Content

[0003] To overcome the above deficiencies, this application provides a coal conveying early warning device, which aims to improve the problems mentioned in the background art.

[0004] This application provides a coal conveying early warning device, including a gas monitor body, an exhaust mechanism, and a reversing valve. The exhaust outlet of the exhaust mechanism is connected to the gas monitor body through the reversing valve. The exhaust inlet of the exhaust mechanism is fixedly connected to a main pipe. The main pipe is arranged along the coal conveying line. Air inlet valves are arranged in an axial array on the main pipe. A translation mechanism is arranged inside the main pipe. A stop wheel is arranged on the translation mechanism. The stop wheel controls the air inlet valves to open.

[0005] In one specific implementation, the exhaust mechanism includes an exhaust pipe with a fan connected in series on it. The fan's outlet is connected to the reversing valve, and the fan's inlet is fixedly connected to the main pipe.

[0006] In the above process, when the reversing valve reverses, the axial flow exhaust fan expels the air from the main pipe or expels the air from the main pipe into the gas monitor body.

[0007] In one specific implementation, the reversing valve is a two-position four-way valve, one of the inlets of the reversing valve is connected to the fan outlet, and the other inlet of the reversing valve is connected to a gas cylinder containing calibration gas.

[0008] In the above implementation process, when the reversing valve is in position one, the gas cylinder is connected to the gas monitor body, and the fan is connected to the exhaust pipe. A solenoid valve is installed at the gas cylinder nozzle to introduce calibration gas into the gas monitor body for calibration. At the same time, the gas at the test position is discharged through the exhaust pipe, so that both the main pipe and the exhaust pipe are filled with the test gas. When the reversing valve is in position two, the fan introduces the test gas in the main pipe into the gas monitor body for measurement. At the same time, the gas cylinder is connected to the exhaust pipe, but due to the action of the solenoid valve, the gas in the gas cylinder does not leak out. It should be noted that the gas cylinder contains compressed calibration gas, and the solenoid valve is servo controlled, which can precisely control the opening size, so that the calibration gas can enter the gas monitor body in small amounts multiple times during each calibration, reducing the maintenance cycle of the gas cylinder.

[0009] In one specific implementation, the upper end of the exhaust pipe is provided with a one-way valve and a rain cap.

[0010] In the above process, the one-way valve prevents external air from entering the exhaust pipe in the reverse direction, and the rain cap is used to protect against rain.

[0011] In one specific implementation, the translation mechanism includes a lead screw and a slider. The lead screw is rotatably connected to both ends of the main pipe, the slider is threadedly connected to the lead screw, the slider is slidably connected to the inner wall of the main pipe, and the abutment wheel is rotatably connected to the slider.

[0012] In the above implementation process, ribs are provided on both sides of the inner wall of the main pipe, and the slider slides on the ribs to achieve circumferential fixation. In this way, when the lead screw rotates, it can drive the slider to move axially.

[0013] In one specific implementation, the translation mechanism further includes a motor, which is installed at one end of the main pipe, and the output end of the motor is fixedly connected to the lead screw.

[0014] In the above process, the servo motor drives the lead screw to rotate, thereby moving the abutment rollers on the slider to the air intake valve in sequence.

[0015] In one specific implementation, the air intake valve includes an air nozzle and a valve. The air nozzle is fixedly connected to the main pipe, and the valve is slidably connected to the inner wall of the air nozzle. A spring is provided on one side of the valve, and a push rod is provided at the other end of the valve to abut against the abutment wheel.

[0016] In the above process, when the abutment wheel presses against the push rod, it pushes the push rod down to open the valve and evacuate the current area. When the abutment wheel moves away, the spring pushes the valve to reset and automatically close it.

[0017] In one specific implementation, the air nozzle is provided with a sealing ring that abuts against the valve, the center of the valve is a solid structure, and the outer ring of the valve is a hollow structure.

[0018] In the above process, when the valve is opened, the gas passes through the perforated area and enters the main pipe. When the valve is closed, the valve presses against the sealing ring to achieve closure.

[0019] Compared with the prior art, the beneficial effects of this application are: the translation mechanism moves along the main pipe with the abutment wheel, and opens the air inlet valve in sequence, so that the exhaust mechanism exhausts the air in the area to be tested to the outside through the current air inlet valve, so that the main pipe and the exhaust mechanism are filled with the gas to be tested. Then the reversing valve connects the exhaust mechanism with the gas monitor body to realize the measurement of the gas to be tested. This process is repeated, realizing the cyclic measurement of multiple monitoring points by one gas monitor body, reducing investment and maintenance costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the coal conveying early warning device provided in the embodiments of this application;

[0022] Figure 2 A schematic diagram illustrating the connection relationship between the translation mechanism and the intake valve provided in the embodiments of this application;

[0023] Figure 3 A schematic diagram illustrating the connection relationship between the abutment wheel and the intake valve provided for an embodiment of this application;

[0024] Figure 4 This is a schematic cross-sectional view of the intake valve provided in an embodiment of this application.

[0025] In the diagram: 10-Gas monitor body; 20-Exhaust mechanism; 21-Exhaust pipe; 22-Fan; 23-One-way valve; 30-Reversing valve; 40-Main pipe; 50-Inlet valve; 51-Gas nozzle; 52-Valve; 53-Spring; 54-Push rod; 55-Sealing ring; 60-Translation mechanism; 61-Lead screw; 62-Slider; 63-Motor; 70-Abutment wheel; 80-Gas cylinder. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0027] Please see Figures 1-4This application provides a coal conveying early warning device, including a gas monitor body 10, an exhaust mechanism 20 and a reversing valve 30. The air outlet of the exhaust mechanism 20 is connected to the gas monitor body 10 through the reversing valve 30. The air inlet of the exhaust mechanism 20 is fixedly connected to a main pipe 40. The main pipe 40 is arranged along the coal conveying line. An air inlet valve 50 is arranged axially on the main pipe 40. A translation mechanism 60 is arranged inside the main pipe 40. A stop wheel 70 is arranged on the translation mechanism 60. The stop wheel 70 controls the air inlet valve 50 to be open. The translation mechanism 60 moves along the main pipe 40 with the abutment wheel 70, opening the air inlet valve 50 in sequence. This allows the exhaust mechanism 20 to exhaust the air in the area to be tested to the outside through the current air inlet valve 50, filling the main pipe 40 and the exhaust mechanism 20 with the gas to be tested. Then, the reversing valve 30 connects the exhaust mechanism 20 to the gas monitor body 10, enabling the measurement of the gas to be tested. This process is repeated, achieving cyclic measurement of multiple monitoring points by one gas monitor body 10, reducing investment and maintenance costs.

[0028] Please see Figures 1-4 The exhaust mechanism 20 includes an exhaust pipe 21, with a fan 22 connected in series on the exhaust pipe 21. The air outlet of the fan 22 is connected to a reversing valve 30, and the air inlet of the fan 22 is fixedly connected to the main pipe 40. When the reversing valve 30 is switched on, the axial flow exhaust fan 22 either exhausts the air in the main pipe 40 or exhausts the air in the main pipe 40 into the gas monitor body 10.

[0029] Please see Figures 1-4 The reversing valve 30 is a two-position four-way valve. One of the inlets of the reversing valve 30 is connected to the outlet of the fan 22, and the other inlet of the reversing valve 30 is connected to a gas cylinder 80 containing calibration gas. When the reversing valve 30 is in position one, the gas cylinder 80 is connected to the gas monitor body 10, and the fan 22 is connected to the exhaust pipe 21. The gas cylinder 80 is equipped with a solenoid valve to introduce calibration gas into the gas monitor body 10 for calibration. At the same time, the gas at the test position is discharged through the exhaust pipe 21, so that the main pipe 40 and the exhaust pipe 21 are filled with the test gas. When the reversing valve 30 is in position two, the fan 22 introduces the test gas in the main pipe 40 into the gas monitor body 10 for measurement. At the same time, the gas cylinder 80 is connected to the exhaust pipe 21, but due to the action of the solenoid valve, the gas in the gas cylinder 80 does not leak out. It should be noted that the gas cylinder 80 contains compressed calibration gas, and the solenoid valve is servo controlled, which can precisely control the opening size, so that the calibration gas can enter the gas monitor body 10 in small amounts multiple times during each calibration, reducing the maintenance cycle of the gas cylinder 80.

[0030] Please see Figures 1-4 The upper end of the exhaust pipe 21 is equipped with a one-way valve 23 and a rain cap. The one-way valve 23 prevents outside air from entering the exhaust pipe 21 in the reverse direction, and the rain cap is used to protect against rain.

[0031] Please see Figures 1-4 The translation mechanism 60 includes a lead screw 61 and a slider 62. The lead screw 61 is rotatably connected to both ends of the main pipe 40, and the slider 62 is threadedly connected to the lead screw 61. The slider 62 is slidably connected to the inner wall of the main pipe 40, and the abutment wheel 70 is rotatably connected to the slider 62. Ribs are provided on both sides of the inner wall of the main pipe 40. The slider 62 slides on the ribs, achieving circumferential fixation. Thus, when the lead screw 61 rotates, it can drive the slider 62 to move axially.

[0032] Please see Figures 1-4 The translation mechanism 60 also includes a motor 63, which is mounted at one end of the main pipe 40. The output end of the motor 63 is fixedly connected to the lead screw 61. The servo motor 63 drives the lead screw 61 to rotate, thereby moving the abutment rollers 70 on the slider 62 to the air intake valve 50 in sequence.

[0033] Please see Figures 1-4 The intake valve 50 includes an air nozzle 51 and a valve 52. The air nozzle 51 is fixedly connected to the main pipe 40, and the valve 52 is slidably connected to the inner wall of the air nozzle 51. A spring 53 is provided on one side of the valve 52, and a push rod 54 is provided on the other end of the valve 52, which abuts against the push wheel 70. When the push wheel 70 presses against the push rod 54, it pushes the push rod 54 down to open the valve 52 and evacuate the current area. When the push wheel 70 moves away, the spring 53 pushes the valve 52 to reset and automatically close.

[0034] Please see Figures 1-4 The gas nozzle 51 is equipped with a sealing ring 55 that abuts against the valve 52. The center of the valve 52 is a solid structure, while the outer ring of the valve 52 is a hollow structure. When the valve 52 is open, the gas passes through the hollow area and enters the main pipe 40. When the valve 52 is closed, it presses against the sealing ring 55 to achieve closure.

[0035] The working principle of this coal conveying early warning device is as follows: Motor 63 drives screw 61 to rotate, thereby moving the abutment wheel 70 on slider 62 to one of the push rods 54, pushing down the push rod 54 and opening valve 52. At this time, reversing valve 30 is in position one, connecting gas cylinder 80 to the gas monitor body 10, and simultaneously connecting fan 22 to exhaust pipe 21. A solenoid valve at the nozzle of gas cylinder 80 introduces calibration gas into the gas monitor body 10 for calibration. Simultaneously, gas at the test position is discharged from the opened valve 52 through exhaust pipe 21, filling both main pipe 40 and exhaust pipe 21 with the test gas. When reversing valve 30 is in position two, fan 22 introduces the test gas from main pipe 40 into the gas monitor body 10 for measurement. After the measurement is completed, the abutment wheel 70 moves to the next push rod 54 to continue the measurement. In this way, automatic calibration and cyclic measurement of multiple monitoring positions are realized using one gas monitor body 10, which effectively reduces costs and improves monitoring accuracy. In summary, the translation mechanism 60 moves the abutment wheel 70 along the main pipe 40, and opens the air inlet valve 50 in sequence, so that the exhaust mechanism 20 exhausts the air in the area to be measured to the outside through the current air inlet valve 50, so that the main pipe 40 and the exhaust mechanism 20 are filled with the gas to be measured. Then the reversing valve 30 connects the exhaust mechanism 20 with the gas monitor body 10 to realize the measurement of the gas to be measured. This process is repeated to realize the cyclic measurement of multiple monitoring points by one gas monitor body 10, which reduces investment and maintenance costs.

[0036] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A coal conveying early warning device, characterized in that, The gas monitoring instrument body (10) is communicated with the air outlet of the air extraction mechanism (20) through the reversing valve (30), the air inlet of the air extraction mechanism (20) is fixedly communicated with the main pipe (40), the main pipe (40) is arranged along the coal conveying line, the main pipe (40) is axially arranged with the air inlet valve (50), the main pipe (40) is provided with the translation mechanism (60), the translation mechanism (60) is provided with the abutting wheel (70), and the abutting wheel (70) controls the air inlet valve (50) to be conductive.

2. The coal conveying early warning device according to claim 1, characterized in that, The air extraction mechanism (20) comprises an exhaust pipe (21), a fan (22) is connected in series on the exhaust pipe (21), the air outlet of the fan (22) is communicated with the reversing valve (30), and the air inlet of the fan (22) is fixedly communicated with the main pipe (40).

3. The coal conveying early warning device according to claim 2, characterized in that, The reversing valve (30) is a two-position four-way valve, one of the inlets of the reversing valve (30) is communicated with the outlet of the fan (22), and the other inlet of the reversing valve (30) is communicated with the gas cylinder (80) containing calibration gas.

4. The coal delivery early warning device of claim 3, wherein, The upper end of the exhaust pipe (21) is provided with a one-way valve (23) and a rain cap.

5. The coal conveying early warning device according to claim 4, characterized in that, The translation mechanism (60) comprises a sliding block (62), the sliding block (62) is slidably connected with the inner wall of the main pipe (40), and the abutting wheel (70) is rotatably connected with the sliding block (62).

6. The coal conveying early warning device according to claim 5, characterized in that, The translation mechanism (60) further comprises a lead screw (61), the lead screw (61) is rotatably connected with both ends of the main pipe (40), and the sliding block (62) is threadedly connected with the lead screw (61).

7. The coal conveying early warning device according to claim 6, characterized in that, The translation mechanism (60) further comprises a motor (63), the motor (63) is installed at one end of the main pipe (40), and the output end of the motor (63) is fixedly connected with the lead screw (61).

8. The coal conveying early warning device according to claim 7, characterized in that, The air inlet valve (50) comprises an air nozzle (51) and a valve (52), the air nozzle (51) is fixedly communicated with the main pipe (40), and the valve (52) is slidably connected with the inner wall of the air nozzle (51).

9. The coal conveying early warning device according to claim 8, characterized in that, One side of the valve (52) is provided with a spring (53), the other end of the valve (52) is provided with a top rod (54) and abuts against the abutting wheel (70).

10. The coal conveying early warning device according to claim 9, characterized in that, The air nozzle (51) is provided with a sealing ring (55) and abuts against the valve (52), the center of the valve (52) is a solid structure, and the outer ring of the valve (52) is a hollow structure.

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