Coal bunker fire monitoring and early warning system

Abstract

The utility model relates to the technical field of coal bunker fire monitoring, and discloses a coal bunker fire monitoring and early warning system, which comprises a steel pipe fixed on the wall body of a coal bunker in a penetrating manner; one end of the monitoring pipe is open, the other end of the monitoring pipe is closed, and the closed end is detachably connected with one end, in the coal bunker, of the steel pipe; the circuit board is arranged in the monitoring pipe, and a gas sensor is integrated on the circuit board. According to the coal bunker fire monitoring and early warning system, content changes of gases such as carbon monoxide, carbon dioxide, oxygen, methane, acetylene and ethylene in a coal bunker can be monitored through the gas sensors on the circuit board, data are transmitted to the upper computer outside the coal bunker, and the upper computer monitors the gas content and sends the monitored data to the coal bunker. According to the method, the coal piling area which is rapidly heated in the coal bunker can be found more accurately and timely in the early stage, and then the timeliness and accuracy of fire monitoring are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal bunker fire monitoring, in particular to a coal bunker fire monitoring and early warning system. Background Art

[0002] Storing coal in coal bunkers has its advantages, but there are also some problems. In particular, spontaneous combustion of coal in coal yards often occurs, and the frequency of spontaneous combustion is significantly higher than that in open-air coal yards.

[0003] Coal will produce CO gas in the initial stage of oxidation. As the oxidation continues to intensify and the temperature gradually rises, it will also produce CH4, C2H4, C2H2 and other gases under different temperature conditions. Once C2H4, C2H2 and other gases are produced, the oxidation of coal will develop to a violent stage, which will not only cause a large loss of coal calorific value, but also may cause instantaneous fire, bringing safety hazards and environmental accidents. Depending on the type of coal, it generally takes 20 to 90 days from the initial stage to the violent oxidation stage, and it only takes 3 to 7 days from the violent oxidation stage to spontaneous combustion, or even within one day. There is a critical temperature that needs to occur from the initial stage to the violent oxidation stage, and it will be accompanied by the appearance of characteristic gases.

[0004] In the prior art, the monitoring method used to prevent coal spontaneous combustion in coal yards is generally infrared thermal imaging. This monitoring method and method can detect the high temperature or spontaneous combustion of coal, but in actual application, there are the following shortcomings: The characteristic of infrared thermal imaging temperature measurement is surface temperature detection imaging, but in terms of coal spontaneous combustion detection, coal is a poor conductor of heat, and coal oxidation also starts from the inside. When oxidation heat storage problems occur somewhere outside the optical fiber detection range or inside the coal pile, this detection method cannot achieve timely and accurate detection, and it is easy to miss the best treatment opportunity. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a coal bunker fire monitoring and early warning system, which has the advantage of being able to prevent fires by monitoring gas changes in real time.

[0007] (II) Technical solution

[0008] In order to realize the above-mentioned ability to timely and accurately monitor the changes in gas in the coal bunker and achieve the purpose of fire prevention, the utility model provides the following technical solutions: a coal bunker fire monitoring and early warning system, comprising:

[0009] Steel pipes are passed through and fixed on the wall of the coal bunker;

[0010] The monitoring tube has an open end and a closed end away from the open end, and the closed end is detachably connected to an end of the steel pipe located in the coal bunker through a connecting piece; a partition is fixedly installed at the end of the monitoring tube away from the connecting piece, and an air pump is arranged in the partition, the air inlet pipe of the air pump faces the open end of the monitoring tube, and the air outlet pipe of the air pump faces the circuit board;

[0011] The circuit board is arranged in the monitoring tube and is integrated with a gas sensor.

[0012] As a preferred technical solution of the utility model, the connecting piece is a tail cylinder, which is fixedly installed on one closed end of the monitoring pipe and threadedly installed on the end of the steel pipe.

[0013] As a preferred technical solution of the utility model, the gas sensor includes a carbon monoxide sensor, a carbon dioxide sensor, an oxygen sensor, a methane sensor, an acetylene sensor and an ethylene sensor.

[0014] As a preferred technical solution of the utility model, a pre-filter is fixedly installed at the open end of the monitoring pipe.

[0015] As a preferred technical solution of the utility model, the wiring harness of the circuit board sequentially passes through the tail cylinder and the steel pipe to extend to the outside of the coal bunker, and is connected to a host computer arranged outside the coal bunker.

[0016] As a preferred technical solution of the utility model, a branch pipe is also connected to the side wall of the monitoring tube, and the branch pipe is connected to the space where the circuit board is located. A conical groove is formed on the inner wall of the branch pipe, and a conical block matching the conical groove is provided in the branch pipe. The conical block is supported by a spring on a support plate, and the support plate is fixedly installed in the branch pipe by a fixing rod.

[0017] As a preferred technical solution of the utility model, a plurality of columns are fixedly installed on the lower end of the conical block, and the columns are all penetrated by a supporting plate and are slidably connected to the supporting plate.

[0018] As a preferred technical solution of the utility model, it also includes a connecting tube, which is fixedly installed on the blocking rod. The length of the blocking rod is greater than the diameter of the branch pipe. The connecting tube is threadedly installed on the end of the column at the center of the supporting plate.

[0019] As a preferred technical solution of the utility model, a small filter is fixedly installed in the branch pipe.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the utility model provides a coal bunker fire monitoring and early warning system, which has the following beneficial effects:

[0022] 1. The coal bunker fire monitoring and early warning system can monitor the changes in the content of carbon monoxide, carbon dioxide, oxygen, methane, acetylene, ethylene and other gases in the coal bunker through the gas sensors on the circuit board, and transmit the data to the host computer outside the coal bunker. By monitoring the gas content, the host computer can more accurately and timely detect the coal pile area in the coal bunker that is rapidly heating up at an early stage, and then issue an early warning to improve the timeliness and accuracy of fire monitoring.

[0023] 2. The coal bunker fire monitoring and early warning system can draw air from the coal bunker to the gas sensor when the air pump is running, making the air flow faster and further ensuring the accuracy and timeliness of gas content monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a cross-sectional view of the monitoring pipe part of the utility model;

[0026] Figure 3 It is an enlarged schematic diagram of the branch pipe part of the utility model.

[0027] In the figure: 1. steel pipe; 2. monitoring pipe; 3. tail pipe; 4. pre-filter; 5. circuit board; 6. gas sensor; 7. wiring harness; 8. branch pipe; 9. partition; 10. air pump; 11. air inlet pipe; 12. air outlet pipe; 13. conical groove; 14. conical block; 15. column; 16. support plate; 17. fixing rod; 18. spring; 19. small filter; 20. connecting tube; 21. stop rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.

[0029] Embodiment 1:

[0030] See also Figure 1 and Figure 2 A coal bunker fire monitoring and early warning system comprises a steel pipe 1, the steel pipe 1 is passed through and fixed on the wall of the coal bunker, one end of the steel pipe 1 is located inside the coal bunker, and the other end is located outside the coal bunker;

[0031] like Figure 2As shown, a monitoring tube 2 is also provided. The interiors of the steel tube 1 and the monitoring tube 2 are both hollow. One end of the monitoring tube 2 is open, and the end away from the open end is closed. The closed end is detachably connected to the end of the steel tube 1 located in the coal bunker through a connecting piece. In the present embodiment, the connecting piece is a tail cylinder 3, which is fixedly mounted on the closed end of the monitoring tube 2 and can be threadedly mounted on the end of the steel tube 1 located in the coal bunker. The steel tube 1 acts as a bracket, and the entire monitoring tube 2 can also be quickly disassembled and assembled on the steel tube 1.

[0032] In this embodiment, a circuit board 5 is provided in the monitoring tube 2, and a gas sensor 6 is integrated on the circuit board 5. The gas sensor 6 includes a carbon monoxide sensor, a carbon dioxide sensor, an oxygen sensor, a methane sensor, an acetylene sensor and an ethylene sensor, which can monitor the content changes of carbon monoxide, carbon dioxide, oxygen, methane, acetylene, ethylene and other gases in the coal bunker;

[0033] The wiring harness 7 of the circuit board 5 passes through the tail cylinder 3 and the steel pipe 1 in sequence and then extends to the outside of the coal bunker, and is connected to a host computer located outside the coal bunker. The gas sensor 6 monitors changes in the content of gases such as carbon monoxide, carbon dioxide, oxygen, methane, acetylene, and ethylene in the coal bunker, and transmits the data to the host computer outside the coal bunker. By monitoring the gas content, the host computer can more accurately and timely discover the coal pile area in the coal bunker that is rapidly heating up at an early stage, thereby improving the timeliness and accuracy of fire monitoring.

[0034] In the present invention, multiple groups of steel pipes 1 and monitoring pipes 2 can be provided, and each group of monitoring equipment monitors the fire situation in an area, so that the monitoring is more comprehensive and specific.

[0035] like Figure 1 As shown, a pre-filter 4 is fixedly installed at the open end of the monitoring pipe 2 to play a filtering role and can filter dust and coal ash in the air.

[0036] Embodiment 2:

[0037] See also Figure 2 On the basis of the first embodiment, in this embodiment, a partition 9 is fixedly installed at one end of the monitoring tube 2 away from the connecting piece, and an air pump 10 is arranged in the partition 9. The air inlet pipe 11 of the air pump 10 faces the open part of the monitoring tube 2, and the air outlet pipe 12 of the air pump 10 faces the circuit board 5; the operation of the air pump 10 can draw the air in the coal bunker to the gas sensor 6, and the air circulation is faster, which further ensures the accuracy and timeliness of the gas content monitoring.

[0038] In addition, a branch pipe 8 is connected through the side wall of the monitoring tube 2, and the branch pipe 8 is connected to the space where the circuit board 5 is located. A conical groove 13 is formed on the inner wall of the branch pipe 8, and a conical block 14 matching the conical groove 13 is arranged in the branch pipe 8. The conical block 14 is supported by a spring 18 on a supporting plate 16, and the supporting plate 16 is fixedly installed in the branch pipe 8 by a fixing rod 17;

[0039] The branch pipe 8 serves to exhaust air. When the air pump 10 is running, the air pressure pushes the conical block 14 to move and compresses the spring 18. At this time, the excess air in the monitoring tube 2 will be discharged through the gap between the conical block 14 and the conical groove 13. On the contrary, when the air pump 10 is not running, with the support of the spring 18, the conical block 14 is close to the conical groove 13, and can seal the branch pipe 8.

[0040] In practical applications, the air pump 10 can be controlled to run intermittently (correspondingly, when the air pump 10 is working, the gas sensor 6 is also working, and vice versa), so that the gas content in the air in the coal bunker can be detected once every period of time.

[0041] Embodiment three:

[0042] See also Figure 3 On the basis of the first and second embodiments, in the present embodiment, a plurality of columns 15 are fixedly installed at the lower end of the conical block 14, and the columns 15 are all penetrated by a supporting plate 16 and are slidably connected to the supporting plate 16. By inserting the columns 15, the up and down movement of the conical block 14 can be made more stable.

[0043] like Figure 3 As shown, a connecting tube 20 is also provided, and the connecting tube 20 is fixedly mounted on the blocking rod 21, the length of the blocking rod 21 is greater than the diameter of the branch pipe 8, and the connecting tube 20 is threadedly mounted on the end of the column 15 at the center of the supporting plate 16;

[0044] Pull down the column 15 with your fingers and connect the bottom end of the column 15 to the connecting tube 20. With the obstruction of the blocking rod 21, the column 15 and the conical block 14 can be prevented from resetting. At this time, the branch pipe 8 will be in a normally open state, and the external air and the air in the monitoring tube 2 can be freely exchanged. In this way, the air pump 10 is no longer used, and the gas content in the air can be directly monitored in real time through the gas sensor 6. The difference from the second embodiment is that in this embodiment, the gas sensor 6 needs to be in a working state at all times.

[0045] like Figure 3 As shown, a small filter 19 is fixedly installed in the branch pipe 8, and the air passing through the branch pipe 8 can be filtered through the small filter 19 to filter out dust and coal ash.

[0046] Figure 2The size of the middle branch pipe 8 is only exemplary. For those skilled in the art, the size of the branch pipe 8 can be increased or decreased according to actual needs.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal bunker fire monitoring and early warning system, characterized in that: include: A steel pipe (1) is passed through and fixed on the wall of the coal bunker; The monitoring tube (2) has an open end and a closed end away from the open end, and the closed end is detachably connected to an end of the steel pipe (1) located in the coal bunker via a connecting piece; a partition (9) is fixedly installed at the end of the monitoring tube (2) away from the connecting piece, and an air pump (10) is arranged in the partition (9); an air inlet pipe (11) of the air pump (10) faces the open end of the monitoring tube (2), and an air outlet pipe (12) of the air pump (10) faces the circuit board (5); the monitoring tube (2) is provided with a plurality of air inlets (11) and an air outlet pipe (12) of the air pump (10) faces the circuit board (5); A branch pipe (8) is also connected through the side wall of the tube (2), the branch pipe (8) is connected to the space where the circuit board (5) is located, a conical groove (13) is formed on the inner wall of the branch pipe (8), a conical block (14) matching the conical groove (13) is provided in the branch pipe (8), the conical block (14) is supported by a spring (18) on a support plate (16), and the support plate (16) is fixedly installed in the branch pipe (8) by a fixing rod (17); The circuit board (5) is arranged in the monitoring tube (2) and has a gas sensor (6) integrated thereon.

2. A coal bunker fire monitoring and early warning system according to claim 1, characterized in that: The connecting piece is a tail cylinder (3), which is fixedly mounted on a closed end of the monitoring pipe (2) and threadedly mounted on the end of the steel pipe (1).

3. A coal bunker fire monitoring and early warning system according to claim 1, characterized in that: The gas sensor (6) comprises a carbon monoxide sensor, a carbon dioxide sensor, an oxygen sensor, a methane sensor, an acetylene sensor and an ethylene sensor.

4. A coal bunker fire monitoring and early warning system according to claim 1, characterized in that: A pre-filter (4) is fixedly mounted on the open end of the monitoring pipe (2).

5. A coal bunker fire monitoring and early warning system according to claim 2, characterized in that: The wiring harness (7) of the circuit board (5) passes through the tail cylinder (3) and the steel pipe (1) in sequence, extends to the outside of the coal bunker, and is connected to a host computer located outside the coal bunker.

6. A coal bunker fire monitoring and early warning system according to claim 1, characterized in that: A plurality of columns (15) are also fixedly mounted on the lower end of the conical block (14), and the columns (15) are all penetrated by a supporting plate (16) and are slidably connected to the supporting plate (16).

7. A coal bunker fire monitoring and early warning system according to claim 6, characterized in that: It also includes a connecting tube (20) fixedly mounted on a blocking rod (21), the length of the blocking rod (21) being greater than the diameter of the branch pipe (8), and the connecting tube (20) being threadedly mounted on the end of a column (15) at the center of the supporting plate (16).

8. A coal bunker fire monitoring and early warning system according to claim 7, characterized in that: A small filter screen (19) is also fixedly installed in the branch pipe (8).

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