Goaf coal spontaneous combustion monitoring device and use method thereof

Abstract

The invention relates to the technical field of goaf coal spontaneous combustion prevention and control, and particularly discloses a goaf coal spontaneous combustion monitoring device and a use method thereof. The goaf coal spontaneous combustion monitoring device provided by the invention is mounted at a monitoring point through the mounting plate, and impurities in a gas sample can be filtered when the gas sample collection mechanism collects the gas sample, so that the impurities in the gas sample are prevented from influencing an abnormal analysis result; through the arrangement of the cleaning mechanism, the inner wall of the pipeline of the gas sample collection mechanism can be cleaned, and the influence of residual impurities in the pipeline of the gas sample collection mechanism on the abnormal analysis result of the current gas sample in the long-term use process is prevented, so that the accuracy of the abnormal analysis result is improved; and a gas sample analysis result is transmitted to the control terminal, so that a user can remotely monitor abnormal conditions conveniently, and the defect that people cannot directly observe the abnormal conditions when the goaf is moved in an underground hidden space in the prior art is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of goaf coal spontaneous combustion prevention and control, and in particular to a goaf coal spontaneous combustion monitoring device and a use method thereof. Background Art

[0002] Coal spontaneous combustion is a complex physical and chemical process. It is an objective phenomenon in nature. However, coal spontaneous combustion occurs frequently, and the prevention and control of coal spontaneous combustion is particularly important, especially for goafs. The high-temperature points of coal spontaneous combustion in goafs migrate in hidden underground spaces, which cannot be directly observed by people. In addition, coal spontaneous combustion in goafs produces a large number of flammable and explosive gases.

[0003] In the prior art, the temperature method or the gas method is usually used for early warning of spontaneous combustion of coal in goafs. The temperature method is the most direct, but the heat storage conditions in goafs where coal spontaneous combustion generally occur are good (the heat conduction conditions are poor), resulting in poor representation of the temperature in the goafs. Therefore, the gas method is generally used for early warning of spontaneous combustion of coal. For example, CO has the characteristic of existing from room temperature to open flame, and the gas has good fluidity in the goaf, making it easier to observe. However, during the long-term collection process, gas samples will inevitably leave residues in the gas path, which will affect the purity of the gas samples analyzed later, thereby affecting the analysis results.

[0004] Therefore, there is an urgent need to provide a goaf coal spontaneous combustion monitoring device to prevent the residues on the gas path from affecting the purity of the current gas sample to be analyzed and to improve the accuracy of abnormal analysis results. Summary of the invention

[0005] The purpose of the present invention is to provide a goaf coal spontaneous combustion monitoring device and a use method thereof to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides a goaf area coal spontaneous combustion monitoring device, including a mounting plate, on which a mounting seat for fixing the mounting plate is provided; a gas sample collection mechanism, a gas analyzer and a cleaning mechanism are fixedly installed on the mounting plate; the gas sample collection mechanism is used to collect gas samples at the monitoring point and filter the collected gas samples; the gas analyzer is used to perform abnormal analysis on the collected gas samples and transmit the results of the abnormal analysis to a control terminal; the cleaning mechanism is used to clean the inner wall of the pipeline of the gas sample collection mechanism.

[0007] Preferably, the gas sample collection mechanism comprises:

[0008] A collection pipe, wherein a filter and an air pump are sequentially installed at the air inlet end of the collection pipe along the air inlet direction;

[0009] An air distribution pipe, wherein one end of the collection pipe away from the filter is detachably connected to the middle part of the air distribution pipe;

[0010] Two gas pipes, the two gas pipes are detachably mounted at both ends of the gas distribution pipe, and the gas analyzers are correspondingly arranged at the ends of the two gas pipes; one end of the gas pipe close to the gas distribution pipe is equipped with a solenoid valve 1, and one end of the gas pipe close to the gas analyzer is equipped with a solenoid valve 2; the cleaning mechanism is used for cleaning the inner wall of the gas pipe.

[0011] Preferably, a filter 2 is detachably mounted on one end of the gas delivery pipe close to the gas distribution pipe, and the filter 2 is arranged on a side of the solenoid valve 1 close to the gas distribution pipe.

[0012] Preferably, the cleaning mechanism comprises:

[0013] A mounting tube, the mounting tube is fixedly mounted on the mounting plate, the gas distribution pipe is arranged in the mounting tube; a through hole is opened at one end of the mounting tube away from the mounting plate, the collection pipe is sleeved in the through hole;

[0014] A water tank, the water tank is fixedly mounted on the mounting plate and arranged below the mounting tube, a water pump is arranged in the water tank, and a water outlet of the water pump is fixedly connected to a water supply pipe;

[0015] Two water supply branches, the two water supply branches are detachably mounted at the ends of the water supply pipes through tees, the ends of the two water supply branches are respectively connected to one end of the two gas pipes close to the gas analyzer, the water supply branches are located on the side of the solenoid valve 2 away from the gas analyzer, and the two water supply branches are both installed with a solenoid valve 3 at one end close to the gas pipe;

[0016] A water return pipe, one end of which is fixedly connected to the bottom of the installation cylinder, and the other end of which extends into the water tank.

[0017] Preferably, a sewage purification component is provided inside the water tank, and the sewage purification component divides the interior of the water tank into a return water chamber and a water supply chamber. The water pump is arranged in the water supply chamber, and the end of the return water pipe is arranged in the return water chamber. The sewage purification component is used to purify the sewage flowing back from the return water pipe.

[0018] Preferably, the sewage purification component comprises a filter element, and the filter element is fixedly mounted on the inner bottom plate of the water tank, and the top end of the filter element is in contact with the inner top end of the water tank.

[0019] Preferably, the sewage purification component also includes a water baffle plate 1 and a water baffle plate 2 respectively arranged on both sides of the filter element, the height of the water baffle plate 1 is smaller than the height of the water baffle plate 2, the water baffle plate 1 is fixedly installed in the water supply chamber, and the water pump is located on the side of the water baffle plate 1 away from the filter element; the water baffle plate 2 is fixedly installed in the return water chamber, the height of the water baffle plate 2 is smaller than the height of the filter element, and the water outlet end of the return water pipe is located on the side of the water baffle plate 2 away from the filter element.

[0020] Preferably, an infrared temperature detector is fixedly mounted on the top of the mounting plate.

[0021] Preferably, the abnormality analysis includes methane concentration abnormality analysis, carbon dioxide concentration abnormality analysis, carbon monoxide concentration abnormality analysis, oxygen concentration abnormality analysis and ethylene concentration abnormality analysis.

[0022] The method for using the goaf area coal spontaneous combustion monitoring device provided by the present invention comprises the following steps:

[0023] The goaf coal spontaneous combustion monitoring device shall be installed at the monitoring point, and the distance between two adjacent goaf coal spontaneous combustion monitoring devices shall not exceed 5m;

[0024] Control the connection status of the two gas pipes in the gas sample collection mechanism, start the air pump in the gas sample collection mechanism, collect gas samples at the monitoring point, and use the gas analyzer to perform abnormal analysis on the collected gas samples. The results of the abnormal analysis are transmitted to the control terminal; wherein, the air pumping rate is 5L / min;

[0025] After the air pump works continuously for 40 to 60 minutes, the connection state of the two air pipes in the air sample collection mechanism is changed, and the air pipe in the cut-off state in the air sample collection mechanism is cleaned by the cleaning mechanism, and the cleaning time is 3 to 5 minutes;

[0026] After the gas pipeline is cleaned, turn off the cleaning mechanism and restart it after the air pump has worked continuously for 40 to 60 minutes.

[0027] Compared with the prior art, the present invention has the following advantages and technical effects:

[0028] The goaf coal spontaneous combustion monitoring device provided by the present invention can filter impurities in the gas sample when collecting gas samples through the gas sample collection mechanism, so as to prevent the impurities in the gas sample from affecting the abnormal analysis results; through the provision of the cleaning mechanism, the inner wall of the pipeline of the gas sample collection mechanism can be cleaned, so as to prevent the impurities remaining in the pipeline of the gas sample collection mechanism from affecting the abnormal analysis results of the current gas sample during long-term use, thereby improving the accuracy of the abnormal analysis results; the gas sample analysis results are transmitted to the control terminal, so that the user can remotely monitor the abnormal situation, and solves the defect that the goaf moves in the underground hidden space and people cannot directly observe it. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of the goaf area coal spontaneous combustion monitoring device of the present invention;

[0031] Figure 2 This is a front view of the goaf area coal spontaneous combustion monitoring device of the present invention;

[0032] Figure 3 for Figure 2 The cross-sectional view along the AA direction;

[0033] Figure 4 It is a schematic diagram of the internal structure of the water tank of the present invention;

[0034] In the figure: 1. Mounting plate; 2. Mounting seat; 3. Gas analyzer; 4. Collection tube; 5. Filter 1; 6. Air pump; 7. Gas distribution pipe; 8. Gas transmission pipe; 9. Solenoid valve 1; 10. Solenoid valve 2; 11. Filter 2; 12. Mounting tube; 13. Water tank; 14. Water pump; 15. Water supply pipe; 16. Water supply branch pipe; 17. Solenoid valve 3; 18. Return pipe; 19. Filter element; 20. Water baffle 1; 21. Water baffle 2. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0036] like Figures 1 to 4 As shown, the present invention provides a goaf coal spontaneous combustion monitoring device, including a mounting plate 1, on which a mounting seat 2 for fixing the mounting plate 1 is arranged; a gas sample collection mechanism, a gas analyzer 3 and a cleaning mechanism are fixedly installed on the mounting plate 1; the gas sample collection mechanism is used to collect gas samples at the monitoring point and filter the collected gas samples; the gas analyzer 3 is used to perform abnormal analysis on the collected gas samples and transmit the results of the abnormal analysis to the control terminal; the cleaning mechanism is used to clean the inner wall of the pipeline of the gas sample collection mechanism.

[0037] When the present invention collects gas samples through the gas sample collection mechanism, impurities in the gas sample can be filtered to prevent the impurities in the gas sample from affecting the abnormal analysis results; through the setting of the cleaning mechanism, the inner wall of the pipeline of the gas sample collection mechanism can be cleaned to prevent the impurities remaining in the pipeline of the gas sample collection mechanism from affecting the abnormal analysis results of the current gas sample during long-term use, thereby improving the accuracy of the abnormal analysis results; the gas sample analysis results are transmitted to the control terminal, which is convenient for users to remotely monitor abnormal situations, and solves the defect that the goaf moves in the underground hidden space and people cannot directly observe it.

[0038] To further optimize the scheme, in order to realize uninterrupted abnormal analysis of the gas at the monitoring point and make the abnormal analysis unaffected by the cleaning mechanism, the gas sample collection mechanism includes:

[0039] A collection pipe 4, the air inlet end of the collection pipe 4 is sequentially installed with a filter 5 and an air pump 6 along the air inlet direction;

[0040] The gas distribution pipe 7, the end of the collection pipe 4 away from the filter 5 is detachably connected to the middle part of the gas distribution pipe 7;

[0041] Two gas pipes 8 are detachably mounted at both ends of the gas distribution pipe 7, and gas analyzers 3 are provided at the ends of the two gas pipes 8; a solenoid valve 1 9 is installed at one end of the gas pipe 8 close to the gas distribution pipe 7, and a solenoid valve 2 10 is installed at one end of the gas pipe 8 close to the gas analyzer 3; a cleaning mechanism is used to clean the inner wall of the gas pipe 8.

[0042] To further optimize the solution, in order to ensure the filtering effect of the collected gas samples and prevent impurities in the gas samples from affecting the accuracy of abnormal analysis results, a filter 11 is detachably installed on one end of the gas supply pipe 8 close to the gas distribution pipe 7, and the filter 11 is arranged on the side of the solenoid valve 9 close to the gas distribution pipe 7.

[0043] Further optimization scheme, in order to realize the cleaning of the two gas pipelines 8 in sequence, so as to ensure that the gas sample collection mechanism can continuously collect gas samples and perform abnormal analysis on the collected gas samples, at the same time, in order to realize the recycling of cleaning water, the cleaning mechanism includes:

[0044] The mounting tube 12 is fixedly mounted on the mounting plate 1, and the gas distribution pipe 7 is arranged in the mounting tube 12; a through hole is opened at one end of the mounting tube 12 away from the mounting plate 1, and the collection pipe 4 is sleeved in the through hole;

[0045] A water tank 13, which is fixedly mounted on the mounting plate 1 and disposed below the mounting tube 12. A water pump 14 is disposed in the water tank 13, and a water outlet of the water pump 14 is fixedly connected to a water supply pipe 15;

[0046] Two water supply branch pipes 16, the two water supply branch pipes 16 are detachably installed at the end of the water supply pipe 15 through a tee, the ends of the two water supply branch pipes 16 are respectively connected to one end of the two gas pipes 8 close to the gas analyzer 3, the water supply branch pipes 16 are located on the side of the solenoid valve 2 10 away from the gas analyzer 3, and the ends of the two water supply branch pipes 16 close to the gas pipe 8 are both installed with a solenoid valve 3 17;

[0047] A water return pipe 18 , one end of which is fixedly connected to the bottom of the mounting tube 12 , and the other end of which extends into the water tank 13 .

[0048] To further optimize the solution, in order to ensure the cleanliness of the cleaning water, a sewage purification component is provided inside the water tank 13, which divides the interior of the water tank 13 into a return water chamber and a water supply chamber. The water pump 14 is arranged in the water supply chamber, and the end of the return water pipe 18 is arranged in the return water chamber. The sewage purification component is used to purify the sewage flowing back from the return water pipe 18.

[0049] To further optimize the solution, in order to filter the cleaning return water and prevent impurities in the water from affecting the cleaning effect, the sewage purification component includes a filter element 19, which is fixedly mounted on the inner bottom plate of the water tank 13, and the top of the filter element 19 is in contact with the inner top of the water tank 13.

[0050] To further optimize the solution, in order to achieve sedimentation of the cleaning return water and thus improve the purification effect of the cleaning return water, the sewage purification component also includes a water baffle plate 20 and a water baffle plate 21 respectively arranged on both sides of the filter element 19, the height of the water baffle plate 20 is less than the height of the water baffle plate 21, the water baffle plate 20 is fixedly installed in the water supply chamber, and the water pump 14 is located on the side of the water baffle plate 20 away from the filter element 19; the water baffle plate 21 is fixedly installed in the return water chamber, the height of the water baffle plate 21 is less than the height of the filter element 19, and the water outlet end of the return pipe 18 is located on the side of the water baffle plate 21 away from the filter element 19.

[0051] To further optimize the solution, an infrared temperature detector is fixedly installed on the top of the mounting plate 1 to monitor whether spontaneous combustion of coal in the goaf occurs by utilizing temperature changes.

[0052] To further optimize the scheme, the abnormality analysis includes methane concentration abnormality analysis, carbon dioxide concentration abnormality analysis, carbon monoxide concentration abnormality analysis, oxygen concentration abnormality analysis and ethylene concentration abnormality analysis.

[0053] The method for using the goaf area coal spontaneous combustion monitoring device provided by the present invention comprises the following steps:

[0054] The goaf coal spontaneous combustion monitoring device shall be installed at the monitoring point, and the distance between two adjacent goaf coal spontaneous combustion monitoring devices shall not exceed 5m;

[0055] Control the connection state of the two gas pipes 8 in the gas sample collection mechanism, keep one gas pipe 8 in an unobstructed state and the other gas pipe 8 in a cut-off state, start the air pump 6 in the gas sample collection mechanism, collect gas samples at the monitoring point, and use the gas analyzer 3 to perform abnormal analysis on the collected gas samples, and transmit the results of the abnormal analysis to the control terminal; wherein, the air pump 6 has a pumping rate of 5L / min;

[0056] After the air pump 6 works continuously for 40 to 60 minutes, the connection state of the two air pipes 8 in the gas sample collection mechanism is changed, and the gas pipe 8 in the cut-off state in the gas sample collection mechanism is cleaned by the cleaning mechanism, and the cleaning time is 3 to 5 minutes; at this time, the water supply branch pipe 16 connected to the unblocked gas pipe 8 is in a cut-off state to prevent the cleaning water from affecting the abnormal analysis of the gas analyzer 3;

[0057] After the cleaning of the gas pipe 8 is completed, the cleaning mechanism is closed, and after the air pump 6 works continuously for 40 minutes to 60 minutes again, the cleaning mechanism is restarted. At this time, the connection status of the two gas pipes 8 is changed. The gas pipe 8 that was originally in a cut-off state becomes a smooth state, and the gas pipe 8 that was originally in a smooth state becomes a cut-off state. At the same time, the connection status of the two water supply branches 16 is also changed, so that the gas pipe 8 in the cut-off state in the gas sample collection mechanism is cleaned again;

[0058] By repeating the above operation, the gas pipe 8 can be cleaned while maintaining continuous and uninterrupted gas abnormality analysis at the monitoring point, preventing impurities remaining in the gas pipe 8 from affecting the abnormal analysis results of the current gas sample, thereby improving the accuracy of the abnormal analysis results.

[0059] The above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A goaf coal spontaneous combustion monitoring device, characterized in that: It comprises a mounting plate (1), on which a mounting seat (2) for fixing the mounting plate (1) is arranged; a gas sample collection mechanism, a gas analyzer (3) and a cleaning mechanism are fixedly mounted on the mounting plate (1); The gas sample collection mechanism is used to collect gas samples from monitoring points and filter the collected gas samples; the gas analyzer (3) is used to perform abnormality analysis on the collected gas samples and transmit the results of the abnormality analysis to the control terminal; the cleaning mechanism is used to clean the inner wall of the pipeline of the gas sample collection mechanism.

2. The goaf coal spontaneous combustion monitoring device according to claim 1 is characterized in that: The gas sample collection mechanism comprises: A collection pipe (4), wherein a filter (5) and an air pump (6) are sequentially installed at the air inlet end of the collection pipe (4) along the air inlet direction; An air distribution pipe (7), wherein one end of the collection pipe (4) away from the filter (5) is detachably connected to the middle part of the air distribution pipe (7); Two gas supply pipes (8), the two gas supply pipes (8) are detachably mounted at the two ends of the gas distribution pipe (7), and the gas analyzer (3) is correspondingly arranged at the ends of the two gas supply pipes (8); a solenoid valve 1 (9) is mounted at one end of the gas supply pipe (8) close to the gas distribution pipe (7), and a solenoid valve 2 (10) is mounted at one end of the gas supply pipe (8) close to the gas distribution pipe (3); the cleaning mechanism is used for cleaning the inner wall of the gas supply pipe (8).

3. The goaf coal spontaneous combustion monitoring device according to claim 2 is characterized in that: A filter 2 (11) is detachably mounted on one end of the gas delivery pipe (8) close to the gas distribution pipe (7), and the filter 2 (11) is arranged on one side of the solenoid valve 1 (9) close to the gas distribution pipe (7).

4. The goaf coal spontaneous combustion monitoring device according to claim 2 is characterized in that: The cleaning mechanism comprises: A mounting tube (12), wherein the mounting tube (12) is fixedly mounted on the mounting plate (1), and the gas distribution pipe (7) is arranged in the mounting tube (12); a through hole is formed at one end of the mounting tube (12) away from the mounting plate (1), and the collection pipe (4) is sleeved in the through hole; A water tank (13), the water tank (13) is fixedly mounted on the mounting plate (1), and the water tank (13) is arranged below the mounting tube (12), a water pump (14) is arranged in the water tank (13), and a water outlet end of the water pump (14) is fixedly connected to a water supply pipe (15); Two water supply branch pipes (16), the two water supply branch pipes (16) are detachably mounted at the ends of the water supply pipe (15) through a tee, the ends of the two water supply branch pipes (16) are respectively connected to one end of the two gas pipes (8) close to the gas analyzer (3), the water supply branch pipes (16) are located on the side of the solenoid valve 2 (10) away from the gas analyzer (3), and the two water supply branch pipes (16) are both installed with a solenoid valve 3 (17) at one end close to the gas pipe (8); A water return pipe (18), one end of which is fixedly connected to the bottom of the installation cylinder (12), and the other end of which extends into the water tank (13).

5. The goaf coal spontaneous combustion monitoring device according to claim 4 is characterized in that: A sewage purification component is arranged inside the water tank (13), and the sewage purification component divides the inside of the water tank (13) into a return water chamber and a water supply chamber. The water pump (14) is arranged in the water supply chamber, and the end of the return water pipe (18) is arranged in the return water chamber. The sewage purification component is used to purify the sewage flowing back from the return water pipe (18).

6. The goaf coal spontaneous combustion monitoring device according to claim 5, characterized in that: The sewage purification component comprises a filter element (19), wherein the filter element (19) is fixedly mounted on the inner bottom plate of the water tank (13), and the top end of the filter element (19) is in contact with the inner top end of the water tank (13).

7. The goaf coal spontaneous combustion monitoring device according to claim 6, characterized in that: The sewage purification component further comprises a water baffle plate 1 (20) and a water baffle plate 2 (21) respectively arranged on both sides of the filter element (19); the height of the water baffle plate 1 (20) is smaller than the height of the water baffle plate 2 (21); the water baffle plate 1 (20) is fixedly installed in the water supply chamber, and the water pump (14) is located on the side of the water baffle plate 1 (20) away from the filter element (19); the water baffle plate 2 (21) is fixedly installed in the return water chamber, the height of the water baffle plate 2 (21) is smaller than the height of the filter element (19), and the water outlet end of the return water pipe (18) is located on the side of the water baffle plate 2 (21) away from the filter element (19).

8. The goaf coal spontaneous combustion monitoring device according to claim 1, characterized in that: An infrared temperature detector is fixedly mounted on the top of the mounting plate (1).

9. The goaf coal spontaneous combustion monitoring device according to claim 1, characterized in that: The abnormality analysis includes methane concentration abnormality analysis, carbon dioxide concentration abnormality analysis, carbon monoxide concentration abnormality analysis, oxygen concentration abnormality analysis and ethylene concentration abnormality analysis.

10. The method for using the goaf coal spontaneous combustion monitoring device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The goaf coal spontaneous combustion monitoring device shall be installed at the monitoring point, and the distance between two adjacent goaf coal spontaneous combustion monitoring devices shall not exceed 5m; Controlling the connection state of the two gas transmission pipes (8) in the gas sample collection mechanism, starting the gas pump (6) in the gas sample collection mechanism, collecting the gas sample at the monitoring point, and using the gas analyzer (3) to perform abnormal analysis on the collected gas sample, and transmitting the abnormal analysis result to the control terminal; wherein the air pump (6) has a gas extraction rate of 5L / min; After the air pump (6) works continuously for 40 to 60 minutes, the connection state of the two air pipes (8) in the air sample collection mechanism is changed, and the air pipe (8) in the air sample collection mechanism that is in a cut-off state is cleaned by a cleaning mechanism, and the cleaning time is 3 to 5 minutes; After the cleaning of the gas delivery pipe (8) is completed, the cleaning mechanism is closed, and after the air pump (6) has been working continuously for 40 minutes to 60 minutes again, the cleaning mechanism is restarted.

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