Mining flame-proof optical fiber temperature measurement host

Abstract

The invention discloses a mining explosion-proof optical fiber temperature measurement host which comprises a mining explosion-proof box, a machine shell, an intelligent gas production mechanism, a gas phase analyzer and an optical fiber channel. Wherein an optical fiber temperature measuring instrument is arranged in the mining explosion-proof box, the optical fiber temperature measuring instrument penetrates through an optical fiber channel through a plurality of groups of optical fibers to reach a monitoring position of a coal mine goaf, a vertically-arranged machine shell is fixed below the mining explosion-proof box, and an intelligent gas production mechanism is installed in the machine shell. The intelligent gas production mechanism is provided with a plurality of gas production branches corresponding to the optical fibers, the gas production branches and the optical fibers work in a matched mode to form a plurality of sets of coal spontaneous combustion monitoring points, and a gas phase analyzer is arranged on the side, located on the intelligent gas production mechanism, in the machine shell. And the gas phase analyzer is used for detecting and analyzing the concentration of the goaf gas collected in the intelligent gas production mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature measurement and fire prevention equipment in underground coal mines, in particular to a flameproof optical fiber temperature measurement host for mines. Background Art

[0002] Spontaneous combustion of coal is a major hidden danger in coal mine production safety. It will not only cause huge economic losses, but may also cause serious safety accidents. Spontaneous combustion of coal is particularly common in goafs, roof falls and compressed coal pillars. The coal in these areas is exposed to the air and has sufficient oxygen. Coupled with the oxidation of the coal itself, it is easy to accumulate heat. When the temperature reaches a certain level, spontaneous combustion may occur. The temperature detection instruments currently used are mainly infrared thermometers and thermistor, thermocouple, and semiconductor temperature measuring instruments. Since they are all single-point temperature measurements, there is a certain time lag, and each thermal unit requires an independent wiring layout, which makes the overall wiring complex and easy to damage, and the workload of manual maintenance is large.

[0003] Therefore, it is necessary to provide a flameproof optical fiber temperature measuring host for mining to solve the problems raised in the above background technology. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mine flameproof optical fiber temperature measurement host, comprising: a mine flameproof box, a casing, an intelligent gas collection mechanism, a gas phase analyzer and an optical fiber channel; wherein, the mine flameproof box is provided with an optical fiber thermometer, and the optical fiber thermometer reaches the coal mine goaf monitoring position through multiple groups of optical fibers through the optical fiber channel, a vertically fixed casing is fixed below the mine flameproof box, an intelligent gas collection mechanism is installed in the casing, the intelligent gas collection mechanism is provided with a plurality of gas collection branches corresponding to the optical fibers, the gas collection branches and the optical fibers cooperate with each other to form a plurality of coal spontaneous combustion monitoring points, a gas phase analyzer is provided on one side of the intelligent gas collection mechanism in the casing, and the gas phase analyzer is used to perform concentration detection and analysis on the gas in the goaf collected in the intelligent gas collection mechanism;

[0005] The intelligent gas extraction mechanism includes: a sealed pipeline, which is distributed in multiple pieces, and a water filter is provided at one end of the sealed pipeline close to the coal spontaneous combustion monitoring point, a flame arrester is provided on the sealed pipeline behind the water filter, an electric negative pressure pump is provided in the casing, the electric negative pressure pump is connected to the sealed pipeline, and an electromagnetic control valve is provided between the electric negative pressure pump and the sealed pipeline; gas extraction devices are provided on the sealed pipeline at the coal spontaneous combustion monitoring point.

[0006] Furthermore, preferably, two electric negative pressure pumps are provided, and a flow meter and a pressure gauge are also provided in the sealed pipeline.

[0007] Further, as a preferred embodiment, the gas extraction device comprises: an outer pipe sleeve, which is arranged as a multi-section structure, each section of the outer pipe sleeve is arranged on the roof of the coal mine goaf, a plurality of gas extraction pipes are evenly distributed on the outer pipe sleeve, three independently arranged gas supply pipes are arranged in the outer pipe sleeve, a four-way solenoid valve is arranged in the outer pipe, one of the valve ports of the four-way solenoid valve is connected to the gas extraction pipe, and the remaining three valve ports are connected to the gas supply pipe through connecting pipes respectively;

[0008] A circulating gas extraction component is installed at one end of the gas sampling pipe.

[0009] Further, as a preference, each of the circulating gas extraction components can transport the extracted gas from the goaf to the gas analyzer for analysis and detection through one of the gas delivery pipelines at the initial stage of operation, and a control module is provided in the housing, and a data analysis unit is provided in the control module for collecting and processing the gas concentration characteristic data detected in the gas analyzer, and dividing the goaf into different levels of monitoring areas according to the gas concentration in combination with database comparison;

[0010] The gas supply pipeline is arranged in sequence as a low-concentration tube, a medium-concentration tube, and a high-concentration tube. The circulating exhaust assembly in each level of monitoring area can use the best exhaust monitoring method to transport the gas to the gas analyzer through the low-concentration tube, the medium-concentration tube, or the high-concentration tube.

[0011] Further, as a preference, the circulating air extraction assembly comprises: a sealing cylinder, a partition is transversely fixed inside the sealing cylinder, the partition divides the sealing cylinder into two chambers, a vortex guide seat is fixed below the sealing cylinder, an inner tube is vertically arranged at the exhaust end of the vortex guide seat, and one end of the inner tube is penetrated and fixed on the partition;

[0012] The partition is provided with a plurality of rows of holes, and the sealing cylinder is provided with exhaust passages obliquely and symmetrically at both sides below the partition, and the exhaust passages are connected to the chamber below;

[0013] The sealing cylinder is vertically connected with a branch pipe, and the upper end of each branch pipe is connected with the collecting pipe;

[0014] An air guide device is provided at the air inlet end of the vortex guide seat.

[0015] Further, as a preferred embodiment, the gas guide device comprises: a gas guide sleeve, on which a shaft tube is coaxially fixed, a gas chamber is arranged in the shaft tube, a plurality of gas passages are circumferentially distributed in the shaft tube below the gas chamber, and the gas passages are connected to the gas chamber;

[0016] An airflow cover is connected below the air guide sleeve, and a flow cut-off block is installed in the airflow cover. A support rod is vertically slidably connected in the air guide sleeve, and the lower end of the support rod is connected to the flow cut-off block.

[0017] A central channel is provided in the middle of the intercepting block.

[0018] Further, as a preference, a sealing ring is provided between the air guide sleeve and the airflow cover, a fixing ring is coaxially fixed inside the sealing ring, a connecting pipe is vertically provided on the intercepting block, the connecting pipe is connected to the central channel, and the end of the support rod is fixed to the connecting pipe;

[0019] A retaining ring is sleeved on the connecting tube, and the retaining ring can be sealed and contacted with the fixed ring under the sliding action of the connecting tube. A blocking ball is arranged in the center of the sealing ring. A microporous wall with an arc-shaped cross-section is arranged in the connecting tube. One end of the blocking ball extends into the microporous wall of the connecting tube and slides and blocks the microporous wall.

[0020] Further, as a preference, when the connecting tube is slid upward in a vertical direction, the retaining ring gradually approaches the fixed ring, and at this time the retaining ball can be separated from the microporous wall of the connecting tube, thereby increasing the air flow in the central channel;

[0021] A telescopic driving part is arranged in the air guide sleeve, and a telescopic end of the telescopic driving part is fixed to the support rod.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The mine explosion-proof box used in the present invention can monitor the goaf area at a fixed point through optical fiber temperature measurement technology. The intelligent gas production mechanism also provided therein can integrate the distributed optical fiber temperature sensing technology with the gas detection technology through the gas production monitoring of the goaf in conjunction with the mine explosion-proof box temperature measurement technology, thereby verifying the correspondence between the gas changes in the goaf and the characteristic temperature, and realizing intelligent monitoring of the goaf based on the correspondence. The overall monitoring sensitivity is high and there will be no monitoring misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the intelligent gas extraction mechanism in the present invention;

[0026] Figure 3 It is a structural schematic diagram of the gas extraction device in the present invention;

[0027] Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle;

[0028] Figure 5 It is a structural schematic diagram of the circulating air extraction component in the present invention;

[0029] Figure 6 It is a structural schematic diagram of the air guide device in the present invention;

[0030] Figure 7 is a cross-sectional view of the airflow hood of the present invention;

[0031] In the figure: 1. Mine explosion-proof box; 11. Machine; 12. Optical fiber channel; 13. Coal spontaneous combustion monitoring point; 14. Gas phase analyzer; 2. Intelligent gas collection mechanism; 21. Sealed pipeline; 22. Water filter; 23. Flame arrester; 24. Electric negative pressure pump; 25. Solenoid control valve; 3. Gas collection device; 31. Outer pipe sleeve; 32. Gas collection pipe; 33. Gas delivery pipeline; 34. Four-way solenoid valve; 35. Take-over; 4. Circulation and exhaust assembly; 41. Sealing cylinder; 42. Partition; 43. Vortex guide seat; 44. Inner tube; 45. Exhaust duct; 46. Collecting pipe; 5. Air guide device; 51. Air guide sleeve; 52. Shaft tube; 53. Air duct; 54. Air flow cover; 55. Cut-off block; 56. Support rod; 57. Center channel; 6. Sealing ring; 61. Fixed ring; 62. Connecting pipe; 63. Retaining ring; 64. Block ball. DETAILED DESCRIPTION

[0032] See also Figure 1-Figure 7 In the embodiment of the present invention, a flameproof optical fiber temperature measuring host for mines comprises: a flameproof box for mines 1, a casing 11, an intelligent gas collection mechanism 2, a gas phase analyzer 14 and an optical fiber channel 12; wherein, an optical fiber thermometer is arranged in the flameproof box for mines 1, and the optical fiber thermometer reaches the monitoring position of the coal mine goaf area through multiple groups of optical fibers through the optical fiber channel 12, and a casing 11 arranged vertically is fixed below the flameproof box for mines 1, and an intelligent gas collection mechanism 2 is installed in the casing 11, and the intelligent gas collection mechanism 2 is provided with a plurality of gas collection branches corresponding to the optical fibers, and the gas collection branches are connected to the monitoring position of the coal mine goaf area. The optical fibers cooperate with each other to form multiple groups of coal spontaneous combustion monitoring points 13. A gas phase analyzer 14 is arranged on one side of the intelligent gas collection mechanism 2 in the casing 1. The gas phase analyzer 14 is used to detect and analyze the concentration of the gas in the goaf collected in the intelligent gas collection mechanism 2; wherein, the online monitoring of the goaf gas includes gas components such as O2, CO, CO2, CH4, C2H2, and C2H4; that is, by measuring the temperature and monitoring the gas in the goaf, the authenticity of the abnormal signal can be judged more accurately, the false alarm caused by the fluctuation of a single indicator can be reduced, and the reliability of the monitoring system can be improved;

[0033] The intelligent gas extraction mechanism 2 includes: a sealed pipeline 21, which is distributed in multiple pieces, and a water filter 22 is provided at one end of the sealed pipeline 21 close to the coal spontaneous combustion monitoring point 13, a flame arrester 23 is provided on the sealed pipeline 21 behind the water filter 22, an electric negative pressure pump 24 is provided in the casing 11, and the electric negative pressure pump 24 is connected to the sealed pipeline 21, and an electromagnetic control valve 25 is provided between the electric negative pressure pump 24 and the sealed pipeline 21; a gas extraction device 3 is provided at each coal spontaneous combustion monitoring point 13 on the sealed pipeline 21; the system design can be combined with the site to achieve correct matching and reasonable combination, so that the gas phase analyzer and each gas extraction branch can adapt well to the special process conditions of gas analysis in the goaf, and continuously and automatically monitor the gas content in the production work of the goaf.

[0034] In this embodiment, two electric negative pressure pumps 24 are equipped. During normal operation, the two negative pressure pumps work alternately to prevent the electric negative pressure pumps from aging and damage due to long working hours. A flow meter and a pressure gauge are also provided in the sealed pipe 21. The flow meter range is 0.2-2L / min. A needle valve is integrated at the bottom of the flow meter to adjust the gas flow rate according to the instrument requirements; the pressure sensor has a measurement range of 0-1MPa, and the output is a standard current signal of 4-20ma.

[0035] As a preferred embodiment, the gas production device 3 includes: an outer pipe sleeve 31, which is set to a multi-section structure, each section of the outer pipe sleeve 31 is arranged on the roof of the coal mine goaf, and multiple gas production pipes 32 are evenly distributed on the outer pipe sleeve 31. Three independently arranged gas supply pipes 33 are arranged in the outer pipe sleeve 31. A four-way solenoid valve 34 is arranged in the outer pipe 31, and one of the valve ports of the four-way solenoid valve 34 is connected to the gas production pipe 32, and the remaining three valve ports are connected to the gas supply pipe 33 through the connecting pipe 35; that is, each gas production pipe can pump the gas at the corresponding position of the goaf into the gas supply pipe, and send it into the gas phase analyzer through the gas supply pipe, wherein the gas passes through the water filter, flame arrester and electromagnetic control valve on the sealing pipe in turn;

[0036] A circulating gas extraction component 4 is installed at one end of the gas sampling pipe 32 .

[0037] In this embodiment, each of the circulating gas extraction components 4 can transport the extracted gas from the goaf to the gas analyzer 14 for analysis and detection through one of the gas delivery pipes 33 at the initial stage of operation. A control module is provided in the housing 11, and a data analysis unit is provided in the control module for collecting and processing the gas concentration characteristic data detected in the gas analyzer 14, and dividing the goaf into different levels of monitoring areas according to the gas concentration in combination with the database comparison;

[0038] The gas delivery pipeline 33 is sequentially arranged as a low-concentration pipe, a medium-concentration pipe, and a high-concentration pipe. The circulating gas extraction component 4 in each level of monitoring area can use the best gas extraction monitoring method to transport the gas to the gas analyzer 14 through the low-concentration pipe, the medium-concentration pipe or the high-concentration pipe. In other words, the gas sampling device is preferentially arranged as a whole so that the gas sampling pipe on the outer pipe sleeve can be located at the corresponding monitoring point. At this time, each gas sampling pipe samples the gas at each monitoring point, thereby identifying the initial gas concentration distribution corresponding to the monitoring point of the goaf area, and judging whether the monitoring point is a low-concentration area, a medium-concentration area or a high-concentration area. Then, the gas sampling pipes in the same concentration range can uniformly transport the gas through the same gas delivery pipeline; this advantage is:

[0039] 1. By identifying the initial gas concentration distribution of the monitoring points in the goaf, it is possible to quickly determine which areas belong to low-concentration areas, medium-concentration areas or high-concentration areas. This classification is helpful for subsequent resource allocation and risk assessment, thereby providing high-frequency and high-precision gas extraction detection for high concentrations;

[0040] 2. Connecting the gas sampling pipes within the same concentration range to the same gas delivery pipeline can reduce the number of pipelines required in the processing and analysis process and simplify the structure of the entire system. Even if there is a certain deviation in the gas concentration in the same concentration area, the overall deviation is small and has little effect on the monitoring results;

[0041] 3. Centralized processing of gas samples in the same concentration range makes the system easier to manage and maintain. Once abnormal concentration changes occur, they can be quickly located and resolved with the help of optical fiber temperature measurement technology.

[0042] In this embodiment, the circulating exhaust assembly 4 includes: a sealing cylinder 41, a partition 42 is transversely fixed inside the sealing cylinder 41, and the partition 42 divides the sealing cylinder 41 into two chambers in the upper and lower parts. A vortex guide seat 43 is fixed below the sealing cylinder 41, and an inner tube 44 is vertically arranged at the exhaust end of the vortex guide seat 43, and one end of the inner tube 44 is fixed on the partition 42; the vortex guide seat can pump the gas in the goaf into the sealing cylinder through the inner tube during operation;

[0043] The partition plate 42 is provided with a plurality of rows of holes, and the sealing cylinder 41 is provided with exhaust passages 45 obliquely and symmetrically at both sides below the partition plate 42, and the exhaust passages 45 are connected to the chamber below;

[0044] The sealing cylinder 41 is vertically connected with branch pipes, and the upper end of each branch pipe is connected to the manifold 46;

[0045] The air inlet end of the vortex guide seat 43 is provided with a gas guide device 5, wherein the vortex guide seat can realize gas circulation pumping to the monitoring point under continuous operation. By continuously circulating and pumping gas, it can ensure that the monitoring instrument continuously receives fresh samples, avoids measurement deviations caused by gas retention, and thus improves the accuracy and real-time nature of the monitoring data.

[0046] In this embodiment, the air guide device 5 comprises: an air guide sleeve 51, on which a shaft tube 52 is coaxially fixed, an air chamber is arranged in the shaft tube 52, and a plurality of air passages 53 are circumferentially distributed below the air chamber in the shaft tube 52, and the air passages 53 are connected to the air chamber;

[0047] An airflow cover 54 is connected below the air guide sleeve 51, and a cut-off block 55 is installed in the airflow cover 54. A support rod 56 is vertically slidably connected in the air guide sleeve 51, and the lower end of the support rod 56 is connected to the cut-off block 55.

[0048] A central channel 57 is provided in the middle of the cut-off block 55, that is to say, the air guide device can pump gas through the gap channel between the airflow hood and the cut-off block in cooperation with the vortex guide seat in the circulation pumping, and can also pump gas through the central channel in the cut-off block.

[0049] As a preferred embodiment, a sealing ring 6 is provided between the air guide sleeve 51 and the airflow cover 54, a fixing ring 61 is coaxially fixed inside the sealing ring 6, a connecting pipe 62 is vertically provided on the intercepting block 55, the connecting pipe 62 is connected to the central channel 57, and the end of the support rod 56 is fixed to the connecting pipe 62;

[0050] A retaining ring 63 is sleeved on the connecting tube 62, and the retaining ring 63 can be in sealing contact with the fixed ring 61 under the sliding action of the connecting tube 62. A blocking ball 64 is arranged at the center of the sealing ring 6. A microporous wall with an arc-shaped cross-section is arranged in the connecting tube 62. One end of the blocking ball 64 extends into the microporous wall of the connecting tube and slides to seal the microporous wall.

[0051] In this embodiment, when the connecting tube 62 is slid upward in a vertical direction, the retaining ring 63 gradually approaches the fixed ring 61, and the blocking ball 64 can be separated from the microporous wall of the connecting tube 62, thereby increasing the air flow in the central channel 57;

[0052] The gas guide sleeve 51 is provided with a telescopic driving part, and the telescopic end of the telescopic driving part is fixed to the support rod 56. In the gas extraction detection for different gas concentration areas, the gas guide device can adjust the gas flow ratio between the gas flow hood and the central channel in the self-adjustment, so as to change the gas extraction range, so as to achieve the best gas extraction monitoring mode for gas extraction detection in different gas concentration areas. For example, for high concentration areas, diffuse gas extraction can be mainly performed through the gas flow hood, which can more effectively cover a large area of ​​space, capture more gas molecules, avoid insufficient representation caused by local sampling, and improve detection sensitivity and response time, which is particularly important for rapidly changing gas concentrations.

[0053] Therefore, according to the different gas concentrations, the gas guide device can automatically adjust the gas extraction strategy to improve detection efficiency and accuracy.

[0054] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flameproof optical fiber temperature measurement host for mines, Features: It includes: A mine flameproof box (1), a casing (11), an intelligent gas collection mechanism (2), a gas phase analyzer (14) and an optical fiber channel (12); wherein the mine flameproof box (1) is provided with an optical fiber thermometer, and the optical fiber thermometer reaches a coal mine goaf monitoring position through a plurality of optical fibers passing through the optical fiber channel (12); a casing (11) arranged vertically is fixed below the mine flameproof box (1); an intelligent gas collection mechanism (2) is installed in the casing (11); the intelligent gas collection mechanism (2) is provided with a plurality of gas collection branches corresponding to the optical fibers, and the gas collection branches cooperate with the optical fibers to form a plurality of coal spontaneous combustion monitoring points (13); a gas phase analyzer (14) is provided in the casing (1) on one side of the intelligent gas collection mechanism (2); the gas phase analyzer (14) is used to detect and analyze the concentration of the goaf gas collected in the intelligent gas collection mechanism (2); The intelligent gas extraction mechanism (2) comprises: a plurality of sealed pipes (21) distributed in a distributed manner, and a water filter (22) is provided at one end of the sealed pipe (21) close to the coal spontaneous combustion monitoring point (13), a flame arrester (23) is provided on the sealed pipe (21) behind the water filter (22), an electric negative pressure pump (24) is provided in the housing (11), the electric negative pressure pump (24) is connected to the sealed pipe (21), and an electromagnetic control valve (25) is provided between the electric negative pressure pump (24) and the sealed pipe (21); and a gas extraction device (3) is provided at each of the coal spontaneous combustion monitoring points (13) on the sealed pipe (21).

2. A flameproof optical fiber temperature measuring host for mining according to claim 1, Features: Two electric negative pressure pumps (24) are provided, and a flow meter and a pressure gauge are also provided in the sealed pipeline (21).

3. A flameproof optical fiber temperature measuring host for mining according to claim 1, Features: The gas extraction device (3) comprises: an outer pipe sleeve (31) which is arranged as a multi-section structure, each section of the outer pipe sleeve (31) is arranged on the roof of the coal mine goaf, a plurality of gas extraction pipes (32) are evenly distributed on the outer pipe sleeve (31), three independently arranged gas supply pipes (33) are arranged in the outer pipe sleeve (31), a four-way solenoid valve (34) is arranged in the outer pipe (31), one of the valve ports of the four-way solenoid valve (34) is connected to the gas extraction pipe (32), and the other three valve ports are connected to the gas supply pipe (33) through connecting pipes (35) respectively; A circulating gas extraction component (4) is installed at one end of the gas sampling pipe (32).

4. A flameproof optical fiber temperature measuring host for mining according to claim 3, Features: Each of the circulating gas extraction components (4) can deliver the extracted gas from the goaf to the gas analyzer (14) for analysis and detection through one of the gas delivery pipes (33) at the initial stage of operation. The housing (11) is provided with a control module, and the control module is provided with a data analysis unit for collecting and processing gas concentration characteristic data detected in the gas analyzer (14), and dividing the goaf into different levels of monitoring areas according to gas concentration in combination with database comparison; The gas delivery pipeline (33) is sequentially arranged as a low-concentration tube, a medium-concentration tube, and a high-concentration tube, and the circulating gas extraction component (4) in each level of monitoring area can use the best gas extraction monitoring method to transport the gas to the gas phase analyzer (14) through the low-concentration tube, the medium-concentration tube, or the high-concentration tube.

5. A flameproof optical fiber temperature measuring host for mining according to claim 3, Features: The circulating air extraction component (4) comprises: a sealing cylinder (41), inside which a partition (42) is transversely fixed, the partition (42) divides the sealing cylinder (41) into two chambers in an upper and lower manner, a vortex guide seat (43) is fixed below the sealing cylinder (41), an inner tube (44) is vertically arranged at the exhaust end of the vortex guide seat (43), and one end of the inner tube (44) penetrates and is fixed on the partition (42); The partition (42) is provided with a plurality of rows of holes, and exhaust passages (45) are obliquely and symmetrically arranged on both sides of the sealing cylinder (41) below the partition (42), and the exhaust passages (45) are connected to the chamber below; The sealing cylinder (41) is vertically connected with a branch pipe, and the upper end of each branch pipe is connected to the collecting pipe (46); An air guide device (5) is provided at the air inlet end of the vortex guide seat (43).

6. A flameproof optical fiber temperature measuring host for mining according to claim 5, Features: The air guide device (5) comprises: an air guide sleeve (51), on which a shaft tube (52) is coaxially fixed, an air chamber is arranged in the shaft tube (52), a plurality of air passages (53) are circumferentially distributed in the shaft tube (52) below the air chamber, and the air passages (53) are connected to the air chamber; An airflow cover (54) is connected below the air guide sleeve (51), and a cut-off block (55) is installed inside the air guide sleeve (54). A support rod (56) is vertically slidably connected inside the air guide sleeve (51), and the lower end of the support rod (56) is connected to the cut-off block (55); A central channel (57) is provided in the middle of the intercepting block (55).

7. A flameproof optical fiber temperature measuring host for mining according to claim 6, Features: A sealing ring (6) is arranged between the air guide sleeve (51) and the airflow cover (54), a fixing ring (61) is coaxially fixed inside the sealing ring (6), a connecting pipe (62) is vertically arranged on the intercepting block (55), the connecting pipe (62) is connected to the central channel (57), and the end of the support rod (56) is fixed to the connecting pipe (62); A retaining ring (63) is sleeved on the connecting tube (62). The retaining ring (63) can be in sealing contact with the fixed ring (61) under the sliding action of the connecting tube (62). A blocking ball (64) is arranged at the center of the sealing ring (6). A microporous wall with an arc-shaped cross section is arranged in the connecting tube (62). One end of the blocking ball (64) extends into the microporous wall of the connecting tube and slides to seal the microporous wall.

8. A flameproof optical fiber temperature measuring host for mining according to claim 7, Features: When the connecting tube (62) is slid upward in a vertical direction, the blocking ring (63) gradually approaches the fixed ring (61), and the blocking ball (64) can be separated from the microporous wall of the connecting tube (62), thereby increasing the air flow in the central channel (57); A telescopic driving part is arranged inside the air guide sleeve (51), and a telescopic end of the telescopic driving part is fixed to a support rod (56).

Images