CN210834821U - Three-belt monitoring device for spontaneous combustion in goaf - Google Patents
Three-belt monitoring device for spontaneous combustion in goaf Download PDFInfo
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- CN210834821U CN210834821U CN201921253681.7U CN201921253681U CN210834821U CN 210834821 U CN210834821 U CN 210834821U CN 201921253681 U CN201921253681 U CN 201921253681U CN 210834821 U CN210834821 U CN 210834821U
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Abstract
The utility model discloses a three area monitoring devices of collecting space area spontaneous combustion, including two monitoring boxes, the monitoring box includes double-deck steel guard box and circuit board, double-deck steel guard box is provided with gas appearance collection system and gas appearance detection mechanism, be provided with intake pipe and outlet duct on the gas appearance collection system, the intake pipe is linked together with the collecting space area after passing the lateral wall of double-deck steel guard box, the outlet duct is connected with gas appearance detection mechanism, gas appearance detection mechanism's gas outlet is connected with the blast pipe, the integration has first controller and communication module on the circuit board, first controller communicates through communication module and main control computer in the pit, communication module includes wired communication module and first wireless communication module. The utility model discloses an install gas sample collection system and gas sample detection mechanism in double-deck steel guard box to fix double-deck steel guard box in the collecting space area, can reduce gas sample collection system and gas sample detection mechanism's damage, improve monitoring devices's life, guarantee tester's safety.
Description
Technical Field
The utility model belongs to the technical field of three monitoring techniques in collecting space area spontaneous combustion, concretely relates to three monitoring devices in collecting space area spontaneous combustion.
Background
Coal spontaneous combustion is one of main disasters of mines, the safety of coal mine personnel is seriously threatened, and serious economic loss is caused. Three-zone observation of spontaneous combustion of coal in the goaf is an important ring for dividing a spontaneous combustion dangerous area of the goaf and is a precondition of a spontaneous combustion prevention technology of the coal in the goaf.
The existing coal mine goaf spontaneous combustion three-zone on-site observation method is that 150m of beam pipes are pre-laid along a roadway outwards at the air inlet side and the air return side respectively from the end position of a coal face, a preset pipeline is behind the roof span after a hydraulic support is removed along with the advance of the face, and the approximate distribution of three zones of the goaf is judged by collecting gas in the preset beam pipes and analyzing the gas components to obtain the data of oxygen and CO gas concentration in the goaf. However, this method of pre-laying pipes has many disadvantages, mainly: 1. the pre-buried pipe is easy to cause the damage, blockage and even pressure break of the pipeline in the process of the collapse of the top plate, thereby causing the pipeline failure; 2. near the coal face, a lot of heavy sundries (single hydraulic prop, wood, oil drum and the like) are placed on the outer side in the roadway, and the heavy sundries are overlapped with the position of a preset pipeline, so that certain difficulty is caused to pipeline laying, and the workload of pipeline laying is increased. 3. The pre-buried pipeline only can pre-lay a pipeline with the length of 150m in a roadway in consideration of the limitation of negative pressure of a gas collecting machine. When the working face advancing distance exceeds the length of the preset pipeline, the preset pipeline is buried in the goaf, and the requirement for monitoring cannot be met for a long time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a three area monitoring devices of collecting space area spontaneous combustion, its structural design is reasonable, it is convenient to install, through all installing gas sample collection system and gas sample detection mechanism inside double-deck steel guard box to fix this double-deck steel guard box in the collecting space area, can reduce gas sample collection system and gas sample detection mechanism's damage, improve whole monitoring devices's life, guaranteed tester's safety.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a three area monitoring devices of collecting space area spontaneous combustion which characterized in that: the monitoring box body comprises two double-layer steel protection boxes and a circuit board arranged in the double-layer steel protection boxes, the two double-layer steel protection boxes are arranged in the goaf through a fixing frame, a gas sample acquisition device and a gas sample detection mechanism are further arranged in the double-layer steel protection boxes, an air inlet pipe and an air outlet pipe are arranged on the gas sample acquisition device, an air inlet end of the air inlet pipe penetrates through the side wall of the double-layer steel protection box and then is communicated with the goaf, the air outlet pipe is connected with an air inlet of the gas sample detection mechanism, an air outlet of the gas sample detection mechanism is connected with an exhaust pipe, an outlet end of the exhaust pipe penetrates through the bottom of the double-layer steel protection box and then is communicated with the goaf, a first controller and a communication module are integrated on the circuit board, and the first controller is communicated with a main control computer on the well through the communication module, the communication module includes a wired communication module and a first wireless communication module.
The spontaneous combustion three-belt monitoring device for the goaf is characterized in that: and a power supply is also arranged in the double-layer steel protection box and is connected with the circuit board.
The spontaneous combustion three-belt monitoring device for the goaf is characterized in that: the double-layer steel protection box comprises an inner box body, an outer box body and memory sponge, wherein the outer box body is sleeved outside the inner box body, the memory sponge is filled between the inner box body and the outer box body, and a plurality of damping mechanisms are arranged between the inner box body and the outer box body.
The spontaneous combustion three-belt monitoring device for the goaf is characterized in that: the bottom of double-deck steel guard box is provided with a plurality of temperature sensor, temperature sensor is connected with first controller.
The spontaneous combustion three-belt monitoring device for the goaf is characterized in that: the fixing frame comprises a cubic supporting frame made of steel pipes, the top of the supporting frame is connected with a quadrangular pyramid-shaped top protection frame made of steel pipes, and the supporting frame is fixedly connected with the roadway coal side through anchor cables.
The spontaneous combustion three-belt monitoring device for the goaf is characterized in that: the double-layer steel protection box is fixedly arranged in the middle of the support frame.
The spontaneous combustion three-belt monitoring device for the goaf is characterized in that: the gas sample collection device is a miniature air pump, the air inlet pipe is connected to the air inlet of the miniature air pump, and the air outlet pipe is connected to the air outlet of the miniature air pump.
The spontaneous combustion three-belt monitoring device for the goaf is characterized in that: the gas sample detection mechanism comprises a sealed tank, wherein a CO gas concentration sensor and CH are arranged in the sealed tank4Gas concentration sensor, C2H4Gas concentration sensor and O2A gas concentration sensor.
The spontaneous combustion three-belt monitoring device for the goaf is characterized in that: and one side of the double-layer steel protection box is provided with a through hole for the multifunctional wire to pass through.
The spontaneous combustion three-belt monitoring device for the goaf is characterized in that: and an antenna matched with the first wireless communication module is arranged outside one side of the double-layer steel protection box.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses an air inlet side and return air side in collecting space area set up a monitoring box respectively and are used for monitoring the gas concentration and the temperature in collecting space area spontaneous combustion three-zone, and it is convenient to install, and field test personnel need not get into the working face danger area, have guaranteed tester's safety.
2. The utility model discloses an all install gas sample collection system and gas sample detection mechanism inside double-deck steel guard box, can reduce gas sample collection system and gas sample detection mechanism's damage, improve whole monitoring devices's life.
3. The utility model discloses an all install gas sample collection system and gas sample detection mechanism in the pit, can realize collecting the limit of collecting the collecting space area gas concentration and detect, and then carry out effective monitoring to collecting space area spontaneous combustion three-zone, can effectively improve its monitoring precision, reduce constructor's working strength, can solve collecting space area gas simultaneously and take out to the in-process on the pit to take place to leak and lead to detecting the unreliability of structure.
4. The utility model discloses a include wired communication module and first wireless communication module with communication module, can make wired communication module and first wireless communication module complement each other, when first wireless communication module lost the effect, can carry out the transmission of signal through wired communication module at once, prevent that the signal from losing the emergence that causes calamity accident in the pit, can satisfy long-time work, can satisfy the exploitation process of whole working face basically.
To sum up, the utility model has the advantages of reasonable design, it is convenient to install, through all installing gas sample collection system and gas sample detection mechanism inside double-deck steel guard box to fix this double-deck steel guard box in the collecting space area, can reduce gas sample collection system and gas sample detection mechanism's damage, improve whole monitoring devices's life, guaranteed tester's safety.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a usage state diagram of the present invention.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is a schematic block diagram of the circuit of the present invention.
Description of reference numerals:
1-double-layer steel protection box; 2-a circuit board; 3-1-a support frame;
3-2-top protection rack; 4-a gas sample collection device; 4-1-air inlet pipe;
4-2-air outlet pipe; 5, an aboveground main control machine; 6, an exhaust pipe;
7-a first controller; 8-1-a wired communication module; 8-2 — a first wireless communication module;
9-a power supply; 10-memory sponge; 11-a damping mechanism;
12-a temperature sensor; 13-anchor cable; 14-roadway coal side;
15-sealing the tank; 16-CO gas concentration sensor;
17—CH4a gas concentration sensor;18—C2H4a gas concentration sensor;
19—O2a gas concentration sensor;20-an antenna;
21-LoRa base station; 22-a first positioning module; 23-a multifunctional wire;
24 — a second controller; 25-a second wireless communication module;
26 — second positioning module.
Detailed Description
As shown in figures 1 and 4, the utility model comprises two monitoring boxes symmetrically arranged at two sides of a goaf, wherein the monitoring boxes comprise a double-layer steel protection box 1 and a circuit board 2 arranged in the double-layer steel protection box 1, the two double-layer steel protection boxes 1 are both arranged in the goaf through a fixing frame, a gas sample acquisition device 4 and a gas sample detection mechanism are also arranged in the double-layer steel protection box 1, an air inlet pipe 4-1 and an air outlet pipe 4-2 are arranged on the gas sample acquisition device 4, the air inlet end of the air inlet pipe 4-1 is communicated with the goaf after passing through the side wall of the double-layer steel protection box 1, the air outlet pipe 4-2 is connected with the air inlet of the gas sample detection mechanism, the air outlet of the gas sample detection mechanism is connected with an exhaust pipe 6, the outlet end of the exhaust pipe 6 is communicated with the goaf after passing through the bottom, the circuit board 2 is integrated with a first controller 7 and a communication module, the first controller 7 is communicated with the main control computer 5 on the well through the communication module, and the communication module comprises a wireless communication module 8-1 and a first wireless communication module 8-2.
As shown in fig. 2, in practical use, one of the double-layer steel protection boxes 1 is installed on one side close to the air inlet side in the goaf through a fixing frame, the other double-layer steel protection box 1 is installed on one side close to the air return side in the goaf through a fixing frame, the monitoring boxes are respectively arranged on the air inlet side and the air return side of the goaf and used for monitoring the gas concentration and the temperature of three spontaneous combustion zones of the goaf, the installation is convenient, on-site testing personnel do not need to enter a dangerous area of a working face, the safety of the testing personnel is guaranteed, the monitoring device is installed near a stoping line to monitor the gas change of the goaf around the stoping line, meanwhile, the monitoring of the goaf after the sealing of the working face can be realized, the workload of coal mine technicians can be greatly reduced, and the coal.
It should be noted that, the gas sample collection device 4 and the gas sample detection mechanism are both installed inside the double-layer steel protection box 1, so that the damage to the gas sample collection device 4 and the gas sample detection mechanism can be reduced, and the service life of the whole monitoring device is prolonged.
In this embodiment, through all installing gas sample collection system 4 and gas sample detection mechanism in the pit, can realize collecting while detecting of collecting space area gas concentration, and then effectively monitor three areas of collecting space area spontaneous combustion, can effectively improve its monitoring precision, reduce constructor's working strength, can solve collecting space area gas simultaneously and take place to leak and lead to detecting the unreliable of structure to the in-process on the well.
In actual use, the communication module comprises the wired communication module 8-1 and the first wireless communication module 8-2, so that the wired communication module 8-1 and the first wireless communication module 8-2 can supplement each other, when the first wireless communication module 8-2 loses the function, signals can be transmitted through the wired communication module 8-1 at once, the occurrence of underground disaster accidents caused by signal loss is prevented, long-time work can be met, and the mining process of the whole working face can be basically met.
It should be noted that the first controller 7 is preferably an ARM microcontroller of the type stm32F103 or an ARM microcontroller of the type RT 3399.
In this embodiment, for a new working face just beginning to be mined, a position with a reasonable topography is selected within a range of 10m to 20m from a cut hole to arrange the monitoring device, and the height of the monitoring device from the roadway ground is preferably 2 m.
In practical use, the circuit board 2 is further integrated with a first positioning module 22 connected with the first controller 7, a positioner is arranged on a coal mining machine for working face mining, the positioner comprises a second controller 24, a second wireless communication module 25 and a second positioning module 26, the second positioning module 26 is connected with the second controller 24, the second controller 24 is communicated with the main control machine 5 in the well through the second wireless communication module 25, and by collecting data of the first positioning module 22 and the second positioning module 26, in the working face advancing process, the distance between the device and the coal mining machine can be obtained by analyzing the data of the first positioning module 22 and the second positioning module 26, so that changes of gas concentration and temperature of three zones of a mined-out area along with the continuous advancing of the coal mining working face can be analyzed.
It should be noted that the first positioning module 22 and the second positioning module 26 both use positioning chips with a model TD1030, the second wireless communication module 25 is the same as the first wireless communication module 8-1, and the second controller 24 is the same as the first controller 7.
In this embodiment, a power supply 9 is further disposed in the double-layer steel protection box 1, and the power supply 9 is connected to the circuit board 2.
During the in-service use, power supply 9 is the lithium cell, the power cord of circuit board 2 is connected on power supply 9, power supply 9 fixed mounting is in the inside of double-deck steel guard box 1.
In this embodiment, the double-layer steel protection box 1 includes an inner box body, an outer box body sleeved outside the inner box body, and a memory sponge 10 filled between the inner box body and the outer box body, and a plurality of damping mechanisms 11 are arranged between the inner box body and the outer box body.
During the in-service use, the interior box and the outer box of double-deck steel guard box 1 are the same rectangle steel case of structure, interior box and outer box are seal structure, double-deck steel guard box 1 forms according to the manufacturing of woodpecker skull shock attenuation principle, and the effect of outer box mainly is used for fixing whole monitoring devices on the mount, and the impact of foreign object can be resisted to the outer box simultaneously, has the ability of stronger anti striking, and the effect of interior box is used for fixed circuit board 2, inside electronic components such as gas appearance collection system 4 and gas appearance detection mechanism, also has certain intensity and waterproof function simultaneously.
It should be noted that, by erecting a plurality of damping mechanisms 11 between the inner box body and the outer box body, and filling memory sponges 10 in the gaps between the inner box body and the outer box body, when a roof coal seam or a rib coal body hits the device, the double-layer steel protection box 1 can protect the circuit board 2, the gas sample collection device 4, the gas sample detection mechanism and other internal electronic components, thereby preventing the electronic components from being damaged, and effectively prolonging the service life of the electronic components.
In this embodiment, the damping mechanism 11 is a spring, and the spring is vertically connected between the inner box and the outer box.
In this embodiment, a plurality of temperature sensors 12 are disposed at the bottom of the double-layer steel protection box 1, and the temperature sensors 12 are connected to the first controller 7.
In actual use, each side of the double-layer steel protection box 1 is fixedly provided with a temperature sensor 12, and the temperature sensor 12 is preferably a temperature sensor with the model number AD590 JH.
As shown in fig. 3, in this embodiment, the fixing frame includes a cubic support frame 3-1 made of a steel pipe, a square pyramid-shaped top protection frame 3-2 made of a steel pipe is connected to the top of the support frame 3-1, and the support frame 3-1 is fixedly connected to a roadway coal side 14 through an anchor cable 13.
During the in-service use, install and fix double-deck steel guard box 1 through setting up the mount, the installation and the fixing of the double-deck steel guard box 1 of being convenient for can make double-deck steel guard box 1 install at appointed height simultaneously, improve monitoring data's reliability.
In the embodiment, the middle part of the top protection frame 3-2 is provided with the stiffening rib, the stiffening rib is a rectangular frame which is horizontally arranged, and the top protection frame 3-2 is arranged on the upper part of the support frame 3-1, so that large coal rocks can be prevented from being hit to the double-layer steel protection box 1 in the top plate coal seam collapse process, and the service life of the double-layer steel protection box 1 is prolonged.
It should be noted that the support frame 3-1 is fastened and connected with the roadway coal side 14 through the anchor cable 13, so that the whole fixing frame can be vertically arranged, the stability of the fixing frame is improved, and the fixing frame is prevented from overturning when the top coal seam collapses to affect the reliability of monitoring data.
In this embodiment, the double-layer steel protection box 1 is fixedly installed in the middle of the support frame 3-1.
When the double-layer steel protection box is used in practice, the middle of the support frame 3-1 is provided with a mounting platform for fixing the double-layer steel protection box 1, the double-layer steel protection box 1 is fixed on the mounting platform, and the mounting platform is horizontally arranged.
In this embodiment, the gas sample collecting device 4 is a micro air pump, the gas inlet pipe 4-1 is connected to the gas inlet of the micro air pump, and the gas outlet pipe 4-2 is connected to the gas outlet of the micro air pump.
In practical use, the micro air pump is preferably a vacuum pump with the model number of VBY7505, the gas sample collection device 4 is electrically connected with the first controller 7, and the first controller 7 can control the opening and closing of the gas sample collection device 4 at any time.
In this embodiment, the gas sample detection mechanism includes a seal pot 15, and a CO gas concentration sensor 16 and CH are provided in the seal pot 154 Gas concentration sensor 17, C2H4Gas concentration sensor 18 and O2A gas concentration sensor 19.
During actual use, an air inlet is formed in one end of the seal tank 15, an air outlet is formed in the other end of the seal tank 15, the air inlet of the seal tank 15 is communicated with the air outlet of the miniature air pump through an air outlet pipe 4-2, the air outlet of the seal tank 15 discharges air to the outside of the double-layer steel protection box 1 through the exhaust pipe 6, the seal tank 15 is arranged between the air outlet pipe 4-2 and the exhaust pipe 6, so that an air concentration sensor can be mounted conveniently, after the miniature air pump extracts air in a goaf through the air inlet pipe 4-1, the air can be discharged to the outside of the double-layer steel protection box 1 after passing through the air outlet pipe 4-2, the seal tank 15 and the exhaust pipe 6 in sequence, and when the extracted air passes through the seal tank 15, the air concentration sensor acts and transmits data.
The CO gas concentration sensor 16, CH4 Gas concentration sensor 17, C2H4Gas concentration sensor 18 and O2The gas concentration sensors 19 are electrically connected to the first controller 7, and the CO gas concentration sensors 16 and CH are provided in the hermetic vessel 154 Gas concentration sensors 17 and C2H4A gas concentration sensor 18 for detecting CO and CH in the gas extracted into the seal tank 154And C2H4The concentration of the goaf is monitored, and the state of the goaf is analyzed.
In this embodiment, the CO gas concentration sensor 16 is preferably a carbon monoxide gas sensor of model ME2-CO, and the CH is4The gas concentration sensor 17 is preferably a catalytic combustion type gas sensor model MJC4/3.0L, C2H4The gas concentration sensor 18 is preferably an ethylene sensor of type SGA-700-C2H4, O2The gas concentration sensor 19 is preferably an oxygen sensor of the type ME 2-O2.
In this embodiment, a through hole for the multifunctional wire 23 to pass through is formed on one side of the double-layer steel protection box 1.
In practical use, the multifunctional wire 23 has a bidirectional transmission function, when the data capacity required to be transmitted is too large, the multifunctional wire 23 is connected between the wired communication module 8-1 and the above-well main control computer 5, so that the first wireless communication module 8-2 can be assisted to transmit signals, and the multifunctional wire 23 can also be used as a power supply line to supply power to the circuit board 2.
In this embodiment, a PVC pipe for the multifunctional electric wire 23 to pass through is buried in the bottom of the tunnel, one end of the PVC pipe is buried in the bottom corner of the tunnel side, and the other end of the PVC pipe extends to the end of the tunnel from the bottom corner of the tunnel side, so that the PVC pipe is sleeved outside the multifunctional electric wire 23 to protect the multifunctional electric wire 23.
In actual use, the wired communication module 8-1 is an RS485 communication module.
In this embodiment, an antenna 20 cooperating with the first wireless communication module 8-2 is disposed outside one side of the double-layer steel protection box 1.
During actual use, the first wireless communication module 8-2 and the second wireless communication module 25 are preferably LoRa modules of LoRa6500AES model numbers, the antenna 20 is preferably a sucker antenna matched with the LoRa modules, and the antenna 20 is connected with the first wireless communication module 8-2.
In this embodiment, be provided with a plurality of LoRa basic stations 21 from inside to outside along the extending direction in tunnel, when carrying out radio communication, first radio communication module 8-2 accessible antenna 20 transmits the signal of monitoring to a plurality of LoRa basic stations 21 in proper order after retransmission to aboveground main control computer 5 and carries out analysis and demonstration, second radio communication module 25 accessible antenna transmits the signal of monitoring to a plurality of LoRa basic stations 21 in proper order after retransmission to aboveground main control computer 5 and carries out analysis and demonstration.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (10)
1. The utility model provides a three area monitoring devices of collecting space area spontaneous combustion which characterized in that: the monitoring box body comprises two monitoring box bodies symmetrically arranged on two sides of a goaf, the monitoring box body comprises a double-layer steel protection box (1) and a circuit board (2) arranged in the double-layer steel protection box (1), the two double-layer steel protection boxes (1) are both arranged in the goaf through fixing frames, a gas sample acquisition device (4) and a gas sample detection mechanism are further arranged in the double-layer steel protection box (1), an air inlet pipe (4-1) and an air outlet pipe (4-2) are arranged on the gas sample acquisition device (4), the air inlet end of the air inlet pipe (4-1) is communicated with the goaf after penetrating through the side wall of the double-layer steel protection box (1), the air outlet pipe (4-2) is connected with the air inlet of the gas sample detection mechanism, the air outlet of the gas sample detection mechanism is connected with an exhaust pipe (6), the outlet end of the exhaust pipe (6) penetrates through the bottom of the double-layer steel, the circuit board (2) is integrated with a first controller (7) and a communication module, the first controller (7) is communicated with the main control computer (5) on the well through the communication module, and the communication module comprises a wired communication module (8-1) and a first wireless communication module (8-2).
2. The goaf spontaneous combustion three-zone monitoring device according to claim 1, wherein: still be provided with power supply (9) in double-deck steel guard box (1), power supply (9) are connected with circuit board (2).
3. The goaf spontaneous combustion three-zone monitoring device according to claim 1, wherein: the double-layer steel protection box (1) comprises an inner box body, an outer box body and memory sponge (10), wherein the outer box body is sleeved outside the inner box body, the memory sponge (10) is filled between the inner box body and the outer box body, and a plurality of damping mechanisms (11) are arranged between the inner box body and the outer box body.
4. The goaf spontaneous combustion three-zone monitoring device according to claim 1, wherein: the bottom of double-deck steel guard box (1) is provided with a plurality of temperature sensor (12), temperature sensor (12) are connected with first controller (7).
5. The goaf spontaneous combustion three-zone monitoring device according to claim 2, wherein: the fixing frame comprises a cubic supporting frame (3-1) made of steel pipes, the top of the supporting frame (3-1) is connected with a quadrangular pyramid-shaped top protection frame (3-2) made of steel pipes, and the supporting frame (3-1) is fixedly connected with a roadway coal side (14) through anchor cables (13).
6. The goaf spontaneous combustion three-zone monitoring device according to claim 5, wherein: the double-layer steel protection box (1) is fixedly arranged in the middle of the support frame (3-1).
7. The goaf spontaneous combustion three-zone monitoring device according to claim 1, wherein: the gas sample collection device (4) is a micro air pump, the air inlet pipe (4-1) is connected to an air inlet of the micro air pump, and the air outlet pipe (4-2) is connected to an air outlet of the micro air pump.
8. The goaf spontaneous combustion three-zone monitoring device according to claim 1, wherein: the gas sample detection mechanism comprises a seal pot (15), wherein a CO gas concentration sensor (16) and CH are arranged in the seal pot (15)4Gas concentration sensor (17), C2H4Gas concentration sensor (18) and O2A gas concentration sensor (19).
9. The goaf spontaneous combustion three-zone monitoring device according to claim 1, wherein: one side of the double-layer steel protection box (1) is provided with a through hole for the multifunctional wire (23) to pass through.
10. The goaf spontaneous combustion three-zone monitoring device according to claim 1, wherein: and an antenna (20) matched with the first wireless communication module (8-2) is arranged outside one side of the double-layer steel protection box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921253681.7U CN210834821U (en) | 2019-08-05 | 2019-08-05 | Three-belt monitoring device for spontaneous combustion in goaf |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921253681.7U CN210834821U (en) | 2019-08-05 | 2019-08-05 | Three-belt monitoring device for spontaneous combustion in goaf |
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| Publication Number | Publication Date |
|---|---|
| CN210834821U true CN210834821U (en) | 2020-06-23 |
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|---|---|---|---|
| CN201921253681.7U Expired - Fee Related CN210834821U (en) | 2019-08-05 | 2019-08-05 | Three-belt monitoring device for spontaneous combustion in goaf |
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| Country | Link |
|---|---|
| CN (1) | CN210834821U (en) |
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2019
- 2019-08-05 CN CN201921253681.7U patent/CN210834821U/en not_active Expired - Fee Related
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