CN212568762U

CN212568762U - Silo combustible gas monitoring system

Info

Publication number: CN212568762U
Application number: CN202021161952.9U
Authority: CN
Inventors: 王永红; 贾海森
Original assignee: China Electric Industry Technology Development Co ltd
Current assignee: China Electric Industry Technology Development Co ltd
Priority date: 2020-06-20
Filing date: 2020-06-20
Publication date: 2021-02-19
Anticipated expiration: 2030-06-20

Abstract

The utility model discloses a silo combustible gas monitoring system belongs to silo monitoring facilities technical field, its technical scheme main points are silo combustible gas monitoring system, including gaseous collection system, preprocessing unit and gaseous analytical equipment, gaseous collection system includes the pick head, air pumping pump and solenoid valve, the top intercommunication of pick head and silo, preprocessing unit includes collecting box and filter screen, the filter screen sets up along the gaseous flow direction of perpendicular to process collecting box, air pumping pump and solenoid valve all communicate the setting between pick head and collecting box, gaseous analytical equipment is including handling case and analysis module, analysis module is used for detecting combustible gas concentration and reports to the police. The function of improving the accuracy of detecting the concentration of the combustible gas in the silo is achieved.

Description

Silo combustible gas monitoring system

Technical Field

The utility model relates to a silo monitoring facilities technical field, in particular to silo combustible gas monitoring system.

Background

The silo is a facility for storing bulk materials, has the advantages of convenience in use, environmental protection, reduced occupied area and the like, the coal storage silo needs to pay attention to the problems of spontaneous combustion and explosion of the silo, the heat is slowly diffused to the periphery due to the small heat conductivity coefficient of coal, the heat is accumulated in a coal pile to raise the internal temperature of the coal pile, when the temperature is raised, the coal pile can release combustible gases such as carbon monoxide (CO), ethane (C2H6) and propane (C3H8), and the temperature of the coal pile can be represented by the appearance of the combustible gases. These combustible gases are mixed with air, and when the temperature, the concentration of the combustible gases and the concentration of dust reach certain values, explosion is initiated, so that the concentration of the combustible gases in the silo needs to be detected at any time.

The traditional method is that a fixed combustible gas sensor P is installed at the top of a silo, and an output signal of the combustible gas sensor P is sent to a microprocessor for judging the gas concentration in the silo.

The defects of the prior art are as follows: due to the large amount of pulverized coal in the coal silo, the pulverized coal may block the inductive probe of the combustible gas sensor P, which may result in inaccurate measurement accuracy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a silo combustible gas monitoring system, reach the function that improves the interior combustible gas concentration detection accuracy of silo.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a silo combustible gas monitoring system, including gaseous collection system, preprocessing unit and gas analysis device, gaseous collection system includes the pick head, pump and solenoid valve take out and send air pump and solenoid valve, the top intercommunication of pick head and silo, preprocessing unit includes collecting box and filter screen, the filter screen sets up along the gaseous flow direction of perpendicular to process collecting box, pump and solenoid valve all communicate the setting between pick head and collecting box, gas analysis device is including handling case and analysis module, the collecting box with handle the case intercommunication, the exit intercommunication of handling the case is provided with the on-off valve, analysis module includes:

the sensor P is used for detecting the concentration of combustible gas in the gas and outputting a combustible gas concentration signal;

the comparison circuit compares the combustible gas concentration detection signal with a reference concentration signal, and the combustible gas concentration detection signal is higher than the reference concentration signal to output an alarm signal;

and the alarm circuit responds to the alarm signal and gives an alarm.

By adopting the technical scheme, when the concentration of the combustible gas in the silo is detected, the electromagnetic valve is controlled to be opened, the opening and closing valve is closed, the pumping air pump is started, the gas in the silo is pumped into the collection box by the pumping air pump, impurities in the mixed coal powder in the combustible gas are filtered by the filter screen, and the cleaner combustible gas enters the treatment box to be contacted with the sensor P, so that the induction probe of the sensor P is not easily blocked by the impurities in the coal powder, and the detection precision and the service life of the detection system are improved; when the detected gas concentration value is higher than the reference concentration signal, the alarm circuit gives an alarm to warn that the gas concentration in the silo of a worker is too high, and after the detection is finished, the opening and closing valve is opened to discharge the combustible gas in the treatment box, so that the next detection is facilitated.

The utility model discloses further set up to: the pretreatment unit also comprises a dehumidification module, one end of the dehumidification module is communicated with the output end of the collection box, and the other end of the dehumidification module is communicated with the input end of the treatment box.

Through adopting above-mentioned technical scheme, the combustible gas after the filter screen filters dehumidifies through dehumidification module for moisture in the combustible gas is difficult for causing the influence to sensor P.

The utility model discloses further set up to: the collecting box and the processing box are arranged at the bottom of the silo, a sampling pipeline is communicated between the collecting box and the collecting head, the pumping and air-supplying pump and the electromagnetic valve are communicated with the sampling pipeline, a leakage detection device is arranged on the sampling pipeline, and the air tightness of the sampling pipeline can be detected through the leakage detection device.

By adopting the technical scheme, the collecting box is fixedly arranged at the bottom of the silo, so that the filtering net piece can be cleaned and replaced by workers in time; the processing box is arranged at the bottom of the silo, so that a worker can conveniently receive the alarm signal and conveniently overhaul the analysis module; because the silo sets up vertically and highly higher, consequently the condition that the gas leakage may exist after long-term the use of longer sampling line, carries out gas tightness through leak hunting device to the sampling line untimely and detects, has improved detecting system's reliability.

The utility model discloses further set up to: the leak detection device comprises a pressure gauge, a reversing solenoid valve and a sealing valve, wherein the sealing valve is arranged at one end of a sampling pipeline communicated with a collecting box, a pumping air pump is arranged at one end, close to a collecting head, of the sampling pipeline, the solenoid valve is communicated with one side, far away from the collecting head, of the pumping air pump and is arranged at the end of the sampling pipeline, the sampling pipeline is communicated with a branch pipe, a first outlet of the reversing solenoid valve is communicated with the branch pipe, a leak detection air pump is communicated with the branch pipe, the output end of the leak detection air pump is communicated with the input port of the reversing solenoid valve, the input end of the leak detection air pump is communicated with an external air source.

By adopting the technical scheme, when the air tightness of the sampling pipeline is detected, the electromagnetic valve and the sealing valve are controlled to be closed, the first outlet of the reversing electromagnetic valve is communicated with the branch pipe, the leakage detection air pump is controlled to work, the external air source is conveyed into the sampling pipeline by the leakage detection air pump, then the first outlet of the reversing electromagnetic valve is controlled to be closed, the leakage detection air pump is controlled to stop, the pressure in the sampling pipeline is a fixed value at the moment, and if the pressure value of the pressure gauge is unchanged within a certain observation time, the air tightness of the sampling pipeline is good.

The utility model discloses further set up to: the detection system further comprises a back-blowing unit, the back-blowing unit comprises a back-blowing stop valve and a back-blowing pipe, a conveying pipe is communicated and arranged between the output end of the dehumidification module and the treatment box, the back-blowing pipe is communicated with a second outlet of the reversing electromagnetic valve, and the back-blowing stop valve is communicated and arranged on the conveying pipe and located on one side, close to the dehumidification module, of the back-blowing pipe.

Through adopting above-mentioned technical scheme, in order to make the combustible gas that persists in the processing case be difficult for causing the influence to next measurement, after the concentration to combustible gas in the silo detects finishing, the staff will the switching-over solenoid valve the second export with the blowback pipe switch-on, close the blowback stop valve, start the leak hunting air pump, the leak hunting air pump blows external air supply to the processing incasement, reached and to handle the gas in the incasement clean, improve the effect that detects the precision next time.

The utility model discloses further set up to: the bottom intercommunication of collecting box is provided with the passage, and the passage is located the filter screen and keeps away from one side of handling the case, and the passage slope sets up, and the passage is kept away from the collecting box tip and is provided with the discharge valve, discharge valve and receipts material case intercommunication.

Through adopting above-mentioned technical scheme, behind the filtration of the mixed buggy impurity in the combustible gas process filter screen group spare, impurity can fall down in the guide pipe, then control the discharge valve and open, impurity falls to in the workbin, has realized the function of conveniently separating the dust collection alone for the difficult gathering of dust is in the collecting box, makes the dust be difficult for turning over in the collecting box under the effect of wind and raises.

The utility model discloses further set up to: the frame is fixedly arranged on the outer side of the filter screen, the frame is fixedly arranged on the inner side wall of the collecting box, a rubber layer is fixedly arranged between the frame and the collecting box, and a vibrating motor is fixedly arranged on one side, close to the treatment box, of the frame.

By adopting the technical scheme, the vibration motor drives the frame and the filter screen in the frame to vibrate, so that the function of cleaning impurities on the filter screen is realized, and the filter screen is not easy to block; because vibrating motor is located the frame and is close to the one side of handling the case, consequently vibrating motor is difficult for receiving the influence of dust.

The utility model discloses further set up to: a flexible rope is fixedly arranged on the frame, and an elastic ball is fixedly connected to the end part of the flexible rope.

Through adopting above-mentioned technical scheme, shut down when taking out the air pump, when needing to carry out further clearance to the filter screen, the staff can start vibrating motor, and vibrating motor vibrates and drives the elastic ball and strikes the filter screen, can realize carrying out the effect of further clearance with the impurity of jam in the filter screen.

To sum up, the utility model discloses following beneficial effect has:

1. by adopting the structure of the acquisition device, the pretreatment unit and the gas analysis device, the effects of preventing the induction probe of the sensor P from being blocked and improving the detection precision of the detection device are achieved;

2. by adopting the structure of the leakage detection device, the function of conveniently carrying out air tightness detection on the long-distance sampling pipeline is realized;

3. by adopting the structure of the back flushing unit, the function of improving the detection precision of the detection system is realized.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a two-dimensional schematic view of the present detection system;

FIG. 3 is a partial three-dimensional schematic view highlighting a filter screen and a vibration motor;

FIG. 4 is a circuit schematic of a highlight analysis module.

Reference numerals: 1. a gas collection device; 11. a pick head; 12. pumping the air pump; 13. an electromagnetic valve; 2. a pre-processing unit; 21. a collection box; 211. a filter screen; 2111. a frame; 212. a vibration motor; 213. a rubber layer; 214. a flexible cord; 215. an elastic ball; 216. a material guide pipe; 2161. a discharge valve; 2162. a material receiving box; 22. a dehumidification module; 3. a gas analysis device; 31. a treatment tank; 32. an analysis module; 311. opening and closing a valve; 312. a delivery pipe; 4. a sampling line; 41. a branch pipe; 5. a leak detection device; 51. a pressure gauge; 52. a reversing solenoid valve; 53. a sealing valve; 54. a leak detection air pump; 6. a blowback unit; 61. a blowback stop valve; 62. a blowback pipe; 7. a silo.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A silo combustible gas monitoring system, refer to fig. 1 and 2, including gas collection system 1, pretreatment unit 2 and gas analysis device 3, gas collection system 1 is used for pumping the gas at the top of silo 7 to pretreatment unit 2, pretreatment unit 2 filters and dehumidifies the impurity in the combustible gas, the combustible gas after handling enters into gas analysis device 3, gas analysis device 3 is used for detecting the concentration of combustible gas, send out the warning when the combustible gas concentration is too high, warn the staff that the combustible gas concentration is too high in the silo 7.

Referring to fig. 1 and 2, the gas collecting device 1 comprises a collecting head 11, an air pumping and delivering pump 12 and an electromagnetic valve 13, a sampling hole is formed in the top of a silo 7, the collecting head 11 is communicated with the sampling hole, the pretreatment unit 2 comprises a collecting box 21 and a dehumidifying module 22, a sampling pipeline 4 is communicated between the collecting head 11 and the collecting box 21, the collecting head 11 can be a filtering type collecting head 11 with a filtering device, the air pumping and delivering pump 12 is communicated with one end of the sampling pipeline 4 close to the collecting head 11, the collecting box 21 is arranged on one side of the bottom of the silo 7, and the electromagnetic valve 13 is arranged on the end part of the sampling pipeline 4 close to the air pumping and delivering pump 12; the dehumidification module 22 is communicated between the collection box 21 and the gas analysis device 3, and the dehumidification module 22 can adopt a dryer; referring to fig. 3 again, a filter screen 211 is fixedly disposed in the collection box 21, a frame 2111 is fixedly disposed on an outer side edge of the filter screen 211, the filter screen 211 is disposed in a direction perpendicular to a flow direction of the gas passing through the collection box 21, a rubber layer 213 is fixedly disposed between the frame 2111 and an inner side wall of the collection box 21, a vibration motor 212 is fixedly disposed on one side of the frame 2111 away from the dehumidification module 22, a material guide pipe 216 obliquely disposed is communicated with a bottom of the collection box 21, and the material guide pipe 216 abuts against the bottom of the frame 2111. When the concentration of combustible gas in the silo 7 is detected, the electromagnetic valve 13 is opened, the pumping air pump 12 is started, the pumping air pump 12 pumps the gas in the silo 7 to the filter screen 211 through the sampling pipeline 4 by the collecting head 11, the filter screen 211 filters large-particle impurities and dust in the gas, the filtered gas is dried by the dehumidification module 22 through the filter screen 211 and then is conveyed into the gas analysis device 3, the impurities mixed in the gas are blocked by the filter screen 211 and then fall into the material guide pipe 216, and at the moment, the dust impurities and moisture mixed in the gas are not easy to influence the gas analysis device 3; when the filter screen 211 needs to be cleaned, the vibration motor 212 can be started, the vibration motor 212 drives the frame 2111 to vibrate, so that impurities deposited on the filter screen 211 can fall into the material guide pipe 216 and are not easy to block the filter screen 211, the rubber layer 213 enables the frame 2111 to be not easy to rigidly collide with the inner side wall of the collection box 21, and the noise reduction effect is achieved.

The filter screen 211 can adopt the stereoplasm metal mesh, can mix some large granule impurity in the gas, and large granule impurity blocks up the mesh of filter screen 211 easily, for the convenience further clearance to filter screen 211, refer to fig. 3, the utility model discloses fixed flexible rope 214 that is provided with on frame 2111, the fixed elastic ball 215 that is provided with on the tip of flexible rope 214, elastic ball 215 can adopt rubber material. The vibration motor 212 drives the frame 2111 to vibrate, and the frame 2111 drives the elastic ball 215 to knock the filter screen 211, so that the filter screen 211 is further cleaned.

In order to conveniently clear up the impurity of deriving the passage 216, refer to fig. 1 and fig. 3, the utility model discloses the end intercommunication of keeping away from collecting box 21 at passage 216 is provided with and receives workbin 2162, is provided with discharge valve 2161 in the passage 216, and impurity can fall behind the passage 216, and control discharge valve 2161 is opened, and impurity falls into in the workbin 2162, conveniently separates the function of back collection alone with the dust, and the dust is difficult for gathering in collecting box 21, makes the dust be difficult for turning up in collecting box 21 under the effect of wind simultaneously.

In order to facilitate the workers to clean and replace the filter screen 211 in time and to overhaul the gas analyzer 3 conveniently, the collecting box 21 and the gas analyzer 3 are both fixed at the bottom of the silo 7, and the sampling pipeline 4 has a long length due to the high height of the silo 7 in the axial direction, so the sampling pipeline 4 is easy to leak for a long time, and in order to improve the detection precision, the airtightness of the sampling pipeline 4 needs to be detected occasionally, therefore, the utility model provides a leak detection device 5 for detecting the airtightness of the sampling pipeline 4 on the sampling pipeline 4, referring to fig. 1, the leak detection device 5 comprises a pressure gauge 51, a reversing solenoid valve 52 and a sealing valve 53, the sealing valve 53 is arranged at one end of the sampling pipeline 4 communicated with the collecting box 21, the sampling pipeline 4 is communicated with a branch pipe 41, and a first outlet of the reversing solenoid valve 52 is communicated with the branch pipe, a leak detection air pump 54 is communicated with the branch pipe 41, the output end of the leak detection air pump 54 is communicated with the input port of the reversing solenoid valve 52, the input end of the leak detection air pump 54 is communicated with an external air source, and a pressure gauge 51 is communicated with and arranged on the sampling pipeline 4 and used for detecting the gas pressure in the sampling pipeline 4. When the air tightness of the sampling pipeline 4 is detected, the control solenoid valve 13 and the sealing valve 53 are closed, the first outlet of the reversing solenoid valve 52 is communicated with one end of the branch pipe 41 communicated with the sampling pipeline 4, the leak detection air pump 54 is controlled to work, the leak detection air pump 54 conveys an external air source into the sampling pipeline 4, then the first outlet of the reversing solenoid valve 52 is controlled to be closed, meanwhile, the leak detection air pump 54 is controlled to stop, at the moment, the pressure in the sampling pipeline 4 is a constant value, if the pressure value of the pressure gauge 51 is unchanged within a certain observation time, the air tightness of the sampling pipeline 4 is good, otherwise, the leakage of the sampling pipeline 4 is detected.

Referring to fig. 1 and 2, the gas analysis apparatus 3 includes a processing box 31 and an analysis module 32 disposed in the processing box 31, a switch 311 is disposed in communication with a side of the processing box 31 away from the dehumidification module 22, and referring to fig. 4, the analysis module 32 includes a sensor P, a comparison circuit and an alarm circuit, the comparison circuit includes a comparator OA1, the alarm circuit includes a transistor Q1, a transistor Q2, a resistor R1, a resistor R2, a resistor R3 and a speaker N, the sensor P is configured to detect a concentration of a combustible gas in the gas and output a combustible gas concentration signal, an output terminal of the sensor P is coupled to a forward input terminal of the comparator 1, a reverse input terminal of the comparator OA1 is coupled to a reference concentration signal, the transistor Q1 is an NPN-type transistor, the transistor Q2 is a PNP-type transistor, a base of the transistor Q1 is coupled to an output terminal of the comparator OA1, an emitter of the transistor Q1 is coupled to the resistor, the other end of the resistor R2 is grounded, the collector of the triode Q1 is coupled with the resistor R1, and the other end of the resistor R1 is coupled with a power supply; the emitter of the transistor Q2 is coupled to the power supply, the base of the transistor Q2 is coupled to the connection node between the resistor R1 and the transistor Q1, the collector of the transistor Q2 is coupled to the speaker N, the speaker N is coupled to the resistor R3, and the other end of the resistor R3 is grounded. The cleaner gas processed by the preprocessing mechanism enters the processing box 31 to contact with the sensor P, when the gas concentration value detected by the sensor P is higher than a reference concentration signal, the triode Q1 is conducted, the triode Q2 is conducted, the loudspeaker N gives an alarm, and workers are warned that the gas concentration in the silo 7 is too high.

Detecting system needs the interval after a period to carry out a lot of detection to the gas in the silo 7, for make the flammable gas who persists in handling the case 31 be difficult for causing the influence to next measurement, refer to fig. 1, the utility model discloses a detecting system still includes blowback unit 6, and blowback unit 6 includes blowback stop valve 61 and blowback pipe 62, and the intercommunication is provided with conveyer pipe 312 between dehumidification module 22 and handling case 31, and blowback pipe 62 and switching-over solenoid valve 52's second export intercommunication, and blowback stop valve 61 intercommunication sets up on conveyer pipe 312 and is located one side that blowback pipe 62 is close to collecting box 21. When carrying out the blowback, the staff can be with the second export and the blowback pipe 62 switch-on of switching-over solenoid valve 52, close blowback stop valve 61, start leak detection air pump 54, leak detection air pump 54 blows external air supply to treatment box 31 in, blows through the time of predetermineeing, can clean, improve next detection precision with the gas in the treatment box 31.

The utility model discloses a use as follows:

when the concentration of combustible gas in the silo 7 is detected, the electromagnetic valve 13 and the sealing valve 53 are opened, the first outlet of the reversing electromagnetic valve 52 is closed, the leakage detection air pump 54 is controlled to stop, the opening and closing valve 311 is closed, gas in the silo 7 is pumped by the pumping and conveying air pump 12, the gas enters the collecting box 21 through the sampling pipeline 4 and is filtered by the filter screen 211, impurities and dust in the gas fall into the material guide pipe 216 after being filtered by the filter screen 211, the gas passing through the filter screen 211 reaches the dryer to be dehumidified, then the gas reaches the processing box 31 and contacts the sensor P, when the concentration signal of the combustible gas output by the sensor P is higher than the reference concentration signal, the triode Q1 is conducted, the triode Q2 is conducted, the loudspeaker N gives an alarm, and workers are warned that the concentration of the combustible gas in the silo.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A silo combustible gas monitoring system which characterized in that: including gaseous collection system (1), preprocessing unit (2) and gas analysis device (3), gaseous collection system (1) is including collection head (11), pump (12) and solenoid valve (13) pump, the top intercommunication of collection head (11) and silo (7), preprocessing unit (2) are including collecting box (21) and filter screen (211), filter screen (211) set up along the flow direction of the gas of perpendicular to process collecting box (21), pump (12) and solenoid valve (13) all communicate the setting between collection head (11) and collecting box (21), gas analysis device (3) are including handling case (31) and analysis module (32), collecting box (21) and handling case (31) intercommunication, the exit intercommunication of handling case (31) is provided with on-off valve (311), analysis module (32) include:

and the alarm circuit responds to the alarm signal and gives an alarm.

2. A silo combustible gas monitoring system according to claim 1 wherein: the pretreatment unit (2) further comprises a dehumidification module (22), one end of the dehumidification module (22) is communicated with the output end of the collection box (21), and the other end of the dehumidification module is communicated with the input end of the treatment box (31).

3. A silo combustible gas monitoring system according to claim 2 wherein: the collecting box (21) and the processing box (31) are arranged at the bottom of the silo (7), a sampling pipeline (4) is communicated between the collecting box (21) and the collecting head (11), the pumping and air-supplying pump (12) and the electromagnetic valve (13) are communicated with the sampling pipeline (4), a leakage detection device (5) is arranged on the sampling pipeline (4), and the air tightness of the sampling pipeline (4) can be detected through the leakage detection device (5).

4. A silo combustible gas monitoring system according to claim 3 wherein: the leak detection device (5) comprises a pressure gauge (51), the sampling device comprises a reversing electromagnetic valve (52) and a sealing valve (53), wherein the sealing valve (53) is arranged at one end of a sampling pipeline (4) communicated with a collecting box (21), a pumping air pump (12) is positioned at one end of the sampling pipeline (4) close to a collecting head (11), the electromagnetic valve (13) is communicated with one side of the pumping air pump (12) far away from the collecting head (11) and positioned at the end part of the sampling pipeline (4), the sampling pipeline (4) is communicated with a branch pipe (41), a first outlet of the reversing electromagnetic valve (52) is communicated with the branch pipe (41), a leakage detection air pump (54) is communicated with the branch pipe (41), an output end of the leakage detection air pump (54) is communicated with an input port of the reversing electromagnetic valve (52), an input end of the leakage detection air pump (54) is communicated with an external air source, and a pressure gauge (51) is communicated with the sampling pipeline (4) and arranged.

5. A silo combustible gas monitoring system according to claim 4 wherein: the monitoring system further comprises a back-blowing unit (6), the back-blowing unit (6) comprises a back-blowing stop valve (61) and a back-blowing pipe (62), a conveying pipe (312) is communicated between the output end of the dehumidification module (22) and the treatment box (31), the back-blowing pipe (62) is communicated with a second outlet of the reversing electromagnetic valve (52), and the back-blowing stop valve (61) is communicated with the conveying pipe (312) and is located on one side, close to the dehumidification module (22), of the back-blowing pipe (62).

6. A silo combustible gas monitoring system according to claim 1 wherein: the bottom of the collecting box (21) is communicated with a material guide pipe (216), the material guide pipe (216) is positioned on one side, away from the treatment box (31), of the filter screen (211), the material guide pipe (216) is obliquely arranged, a discharge valve (2161) is arranged at the end part, away from the collecting box (21), of the material guide pipe (216), and the discharge valve (2161) is communicated with a material collecting box (2162).

7. A silo combustible gas monitoring system according to claim 6 wherein: a frame (2111) is fixedly arranged on the outer side of the filter screen (211), the frame (2111) is fixedly arranged on the inner side wall of the collecting box (21), a rubber layer (213) is fixedly arranged between the frame (2111) and the collecting box (21), and a vibration motor (212) is fixedly arranged on one side, close to the treatment box (31), of the frame (2111).

8. A silo combustible gas monitoring system according to claim 7 wherein: a flexible rope (214) is fixedly arranged on the frame (2111), and an elastic ball (215) is fixedly connected to the end part of the flexible rope (214).