CN114383051A

CN114383051A - Multifunctional gas leakage monitoring device

Info

Publication number: CN114383051A
Application number: CN202111603776.9A
Authority: CN
Inventors: 罗恪; 程则袁; 林飞; 黄思辰; 华思贝; 谭鸿博; 罗威; 覃雁南
Original assignee: Wuhan Dingye Environmental Protection Engineering Technology Co ltd
Current assignee: Wuhan Dingye Environmental Protection Engineering Technology Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-04-22
Anticipated expiration: 2041-12-24
Also published as: CN114383051B

Abstract

The invention is suitable for the technical field of monitoring equipment, and provides a multifunctional gas leakage monitoring device, which comprises: the gas leakage sensor comprises a shell, a gas pipeline and a gas leakage sensor, wherein the shell is sleeved outside the gas pipeline and is formed by surrounding two shells; the connecting mechanism comprises a first motor, a rotating disk, a connecting rod and an alarm unit, the alarm unit can receive signals of the gas leakage sensor A, the connecting mechanism further comprises an external monitoring unit, the external monitoring unit comprises a second motor, a box body, a third motor, a winding roller, a hose, a suction fan and a suction nozzle, a shell and a connecting mechanism are arranged, the two shells can be driven to be quickly separated or enclosed, workers can conveniently check leakage positions of gas pipeline joints or valves and the like, and maintenance is convenient; the external monitoring unit is arranged, so that monitoring in a wider range can be performed, and the monitoring effect is improved.

Description

Multifunctional gas leakage monitoring device

Technical Field

The invention belongs to the technical field of monitoring equipment, and particularly relates to a multifunctional gas leakage monitoring device.

Background

The coal gas is gas which is prepared by processing coal as a raw material and contains combustible components. According to the processing method, the coal gas property and the application, the method is divided into the following steps: the coal gasification obtains water gas, semi-water gas and air gas;

most of gas leakage leaks outwards from the joint of the pipeline, or leaks from the valve installed on the pipeline, gas poisoning can cause fatal injury to people, so the monitoring of gas leakage needs to be carried out, the existing monitoring device is generally fixedly installed at the monitoring position on the gas pipeline through bolts and the like, the disassembly, the assembly and the maintenance are troublesome, and the gas leakage is not beneficial to the inspection and the timely treatment of the leakage position by workers.

Disclosure of Invention

The invention provides a multifunctional gas leakage monitoring device, and aims to solve the problem that the existing device is troublesome to disassemble, assemble and maintain.

The invention is realized in this way, a multifunctional gas leakage monitoring device, comprising:

the gas leakage sensor comprises a shell, a gas pipeline and a gas leakage sensor, wherein the shell is sleeved outside the gas pipeline and is formed by surrounding two shells;

the connecting mechanism comprises a first motor, a rotating disk and connecting rods, the rotating disk is fixedly mounted on an output shaft of the first motor, the rotating disk is oppositely and eccentrically hinged with the two connecting rods, and the two connecting rods are respectively hinged with the two shells;

and the alarm unit can receive a signal of the gas leakage sensor A, and warns if the carbon monoxide leakage is monitored.

Preferably, the alarm unit comprises a warning lamp, a buzzer and a controller, the gas leakage sensor A is electrically connected with the controller, the controller is electrically connected with the warning lamp and the buzzer, and the warning lamp and the buzzer are fixedly arranged outside the shell.

Preferably, two be equipped with the seal cover between the contact surface of casing, on seal cover one end was fixed in a casing, in the seal groove of seting up on the other casing was inserted to the other end, wear to be equipped with many horizontally threaded rods with the hoop interval on the casing that the seal cover is fixed, threaded rod and casing threaded connection, set up on the seal cover and supply threaded rod male jack, under the natural state, the aperture of jack is less than the diameter of threaded rod.

Preferably, the housing is formed by two half-shells, which are connected by a hinge and a snap.

Preferably, every the inside wall of half shell is semi-circular, all is fixed with the arc gasbag on it, and the central angle that the arc gasbag corresponds is greater than 180 degrees and is less than 360 degrees, is connected with on the arc gasbag and fills the trachea, and the arc gasbag dislocation set on two half shells just contacts to the side.

Preferably, still including the protection subassembly, the protection subassembly includes installation pipe and pressure release gasbag, installation pipe one end is fixed in on a casing and with the inner chamber intercommunication, installation pipe other end demountable installation has the pressure release gasbag.

Preferably, the protection subassembly still includes baffle, piston, movable rod, communicating pipe and small bell, the intraductal baffle that is fixed with of installation, the intraductal baffle that lies in of installation is equipped with the piston near one side of casing, is fixed with the movable rod on the piston, and the activity of movable rod runs through the baffle and extends to its opposite side, and it is equipped with the spring to lie in the cover between piston and the baffle on the movable rod, be connected with the communicating pipe that is used for communicateing the baffle both sides cavity on the installation pipe, under the natural state, the one end of communicating pipe is connected with the part that the installation pipe lies in between baffle and the piston, be fixed with the rack on the movable rod, install the pivot on the pipe perpendicular to its pipe wall rotation, the pivot lies in to be fixed with on the shaft section in the installation pipe with rack toothing's gear, the pivot lies in to tie on the outside shaft section of installation pipe and has the small bell.

Preferably, a rotor is fixedly mounted on the rotating shaft, a stator is fixed outside the rotor, and the rotor is connected with the gas leakage sensor A and the alarm unit through a conducting wire.

Preferably, the pressure relief gasbag is transparent, be equipped with the negative pressure pipeline section in communicating pipe, be equipped with the nozzle portion in the negative pressure pipeline section, the spout department of nozzle portion is equipped with the venturi tube portion, and the negative pressure pipeline section is located between nozzle portion and the waiting tube portion and is the suction chamber, and venturi tube portion end is equipped with the diffusion tube portion, the suction chamber passes through the pipeline and is connected with the pigment powder box.

Preferably, the gas leakage monitoring device further comprises an external monitoring unit, the external monitoring unit comprises a second motor, a box body, a third motor, a winding roller, a hose, a suction fan and suction nozzles, the second motor is fixedly arranged on a shell, the box body is fixed on an output shaft of the second motor, the third motor is fixed on a box wall of the box body opposite to the second motor, the output shaft of the third motor is fixedly connected with the winding roller in the box body, a through hole for the hose to pass through is formed in the winding roller, the hose is wound on the winding roller, two ends of the hose respectively penetrate through the side wall of the box body and extend to the outside of the box body, the suction nozzles are respectively arranged at two ends of the hose, a branch pipe is connected on a pipe section of the hose in the winding roller, the branch pipe extends to the outside of the winding roller and is rotatably connected with an air suction opening of the suction fan, a gas leakage sensor B is arranged in the box body and is electrically connected with the alarm unit, an opening is arranged on one side of the box wall of the box body, which is positioned at the gas leakage sensor.

Compared with the prior art, the embodiment of the application mainly has the following beneficial effects:

the gas leakage sensor is characterized by being provided with a shell which is sleeved outside a gas pipeline and is formed by surrounding two shells, and a gas leakage sensor A is fixedly arranged in the shell; the connecting mechanism comprises a first motor, a rotating disc and connecting rods, the rotating disc is driven by the first motor to rotate, the rotating disc drives the two connecting rods to move, and the two connecting rods respectively drive the two shells to be quickly separated or enclosed, so that workers can conveniently check the leakage positions of a gas pipeline joint or a valve and the like, and the maintenance is convenient;

the bell alarm device is characterized by being provided with a protection assembly, wherein the protection assembly comprises an installation pipe and a pressure relief air bag, the protection assembly further comprises a partition plate, a piston, a movable rod, a communication pipe and a bell, when the pressure in the shell is continuously increased, the piston is continuously pushed, the piston moves towards one side close to the partition plate, the piston drives the movable rod to move, the movable rod drives a gear and a rotating shaft to rotate through a rack, and the rotating shaft drives the bell to rotate, so that the bell can make a sound, and the alarm effect is further achieved;

be equipped with external monitoring unit, external monitoring unit includes the second motor, a box body, the third motor, around the roller, the hose, suction fan and suction nozzle, the suction fan produces suction, inhale the hose with outside air through the suction nozzle, then through the branch pipe, discharge to gas leakage inductor B department by the suction fan, it has gas leakage not the outside to monitor, it rotates to drive the box body through the second motor, the box body drives hose and suction nozzle rotation, under the effect of centrifugal force, the hose and the suction nozzle on it can the lateral movement, it slowly rotates around the roller to drive through the third motor, can unreel the hose gradually, make hose and shower nozzle move to the outside, the scope is bigger, can carry out the monitoring of wider, the monitoring effect is improved.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a rotary table and a connecting rod in embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of a housing in embodiment 1 of the present invention;

FIG. 4 is a schematic structural view of embodiment 2 of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is a schematic structural view of embodiment 3 of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6;

FIG. 8 is a schematic structural view of embodiment 4 of the present invention;

fig. 9 is a schematic structural view of the take-up reel in embodiment 4 of the present invention.

Notations for reference numerals: 1-gas pipeline, 2-shell, 3-threaded rod, 4-sealing sleeve, 5-warning lamp, 6-buzzer, 7-gas leakage inductor A, 8-connecting rod, 9-rotating disk, 10-first motor, 11-mounting plate, 12-guide plate, 13-half shell, 14-arc air bag, 15-charging and discharging pipe, 16-protection component, 17-mounting pipe, 18-communicating pipe, 19-bell, 20-rotor, 21-stator, 22-gear, 23-movable rod, 24-clapboard, 25-spring, 26-piston, 27-pressure relief air bag, 28-negative pressure pipe section, 29-pigment powder box, 30-second motor, 31-gas leakage inductor B, etc, 32-suction nozzle, 33-box, 34-hose, 35-third motor, 36-winding roller, 37-suction fan.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Example 1

The embodiment of the invention provides a multifunctional gas leakage monitoring device, as shown in figures 1-3, comprising:

the gas leakage sensor comprises a shell, a gas pipeline 1 and a gas leakage sensor, wherein the shell is sleeved outside the gas pipeline 1, can be the outside of the joint of the two gas pipelines 1, and can also be the position of a valve of the gas pipeline 1, the gas leakage possibility of the two positions is higher, the shell is formed by surrounding two shells 2, a gas leakage sensor A7 is fixedly installed in the shell, and the gas leakage sensor is the prior art, is widely applied and is not described any more;

the driving mechanism is used for driving the two shells 2 to be quickly separated or enclosed, the connecting mechanism comprises a first motor 10, a rotating disk 9 and connecting rods 8, in the embodiment, the first motor 10 is preferably fixedly installed on an installation plate 11 and can be fixed through screws, the installation plate 11 is fixedly connected with the pipe wall of the gas pipeline 1 and can be welded, guide plates 12 are fixed on the two shells 2, guide holes for the installation plate 11 to penetrate through are formed in the guide plates 12, the rotating disk 9 is fixedly installed on an output shaft of the first motor 10, the rotating disk 9 is oppositely and eccentrically hinged with the two connecting rods 8, and the two connecting rods 8 are respectively hinged with the two shells 2;

the alarm unit can receive a signal of the gas leakage sensor A7, and warns if carbon monoxide leakage is monitored;

during the use, drive rotary disk 9 through first motor 10 and rotate, rotary disk 9 drives two connecting rods 8 motions, and two connecting rods 8 drive two casings 2 quickly separating respectively or surround, make things convenient for the staff to look over the position of revealing such as gas piping 1 junction or valve, conveniently maintain.

Specifically, alarm unit includes warning light 5, bee calling organ 6 and controller, and gas leakage inductor A7 is connected with the controller electricity, and the controller is connected with warning light 5 and bee calling organ 6 electricity, and the preferred singlechip that is of controller, and warning light 5 and bee calling organ 6 fixed mounting are outside the shell, and when gas leakage inductor A7 monitored there is gas leakage, feed back to the controller, and controller control warning light 5 is bright and bee calling organ 6 sounds, reminds the staff.

Further, two be equipped with seal cover 4 between the contact surface of casing 2, on 4 one ends of seal cover were fixed in a casing 2, the other end inserted in the seal groove of seting up on another casing 2, wear to be equipped with many horizontally threaded rod 3 with the casing 2 that seal cover 4 is fixed to the annular interval, threaded rod 3 and casing 2 threaded connection, set up on the seal cover 4 and supply threaded rod 3 male jack, under the natural state, the aperture of jack is less than the diameter of threaded rod 3, makes the sealed effect between two casings 2 better through seal cover 4, reduces the leakage of coal gas, through rotating threaded rod 3, makes it crowd into in the jack that corresponds, because the aperture of jack is less than the diameter of threaded rod 3 to make seal cover 4 bloated tightly, further improved sealed effect.

The preferred, in order to conveniently pull down whole device, casing 2 comprises two half shells 13, through hinge and hasp connection between two half shells 13, can realize the separation of two half shells 13 through the hasp, and easy operation, convenient and practical can set up the sealing strip between the contact surface of two half shells 13, and is further, every the inside wall of half shell 13 is semi-circular, all is fixed with arc gasbag 14 on it, and the central angle that arc gasbag 14 corresponds is greater than 180 degrees and is less than 360 degrees, is connected with on the arc gasbag 14 and fills trachea 15, and arc gasbag 14 dislocation set and side on two half shells 13 contact, and the setting of arc gasbag 14 can adapt to the gas pipeline 1 of different external diameters, and two arc gasbags 14 cooperate can play better sealed effect, reduce the leakage of coal gas.

Example 2

On the basis of embodiment 1, as shown in fig. 4-5, the present embodiment further includes a protection component 16, the protection component 16 includes an installation pipe 17 and a pressure relief airbag 27, one end of the installation pipe 17 is fixed on one casing 2 and is communicated with the inner cavity, and can be welded and fixed together, the pressure relief airbag 27 is detachably installed at the other end of the installation pipe 17, and can be tightened by a flexible belt, when gas continuously leaks, and the internal pressure of the casing is relatively high, the gas enters the pressure relief airbag 27 through the installation pipe 17, so that the pressure can be relieved on the one hand, and on the other hand, whether the gas leakage occurs is judged by the size of the pressure relief airbag 27.

Further, the protection component 16 further includes a partition plate 24, a piston 26, a movable rod 23, a communicating pipe 18 and a bell 19, the partition plate 24 is fixed in the installation pipe 17, the piston 26 is arranged on one side of the partition plate 24 close to the casing 2 in the installation pipe 17, the movable rod 23 is fixed on the piston 26, the movable rod 23 movably penetrates through the partition plate 24 and extends to the other side of the partition plate, a spring 25 is sleeved on the movable rod 23 and located between the piston 26 and the partition plate 24, the spring 25 is a compression spring 25, the installation pipe 17 is connected with the communicating pipe 18 for communicating chambers on two sides of the partition plate 24, a pipe joint is adopted for connection, in a natural state, one end of the communicating pipe 18 is connected with a part of the installation pipe 17 located between the partition plate 24 and the piston 26, a rack is fixed on the movable rod 23, a rotating shaft is rotatably installed on the installation pipe 17 perpendicular to the pipe wall, a gear 22 meshed with the rack is fixed on a shaft section of the rotating shaft located in the installation pipe 17, a bell 19 is tied on the shaft section of the rotating shaft positioned outside the mounting pipe 17;

when the pressure in the shell continuously increases, the piston 26 is continuously pushed, the piston 26 moves towards one side close to the partition plate 24, the piston 26 drives the movable rod 23 to move, the movable rod 23 drives the gear 22 and the rotating shaft to rotate through the rack, the rotating shaft drives the bell 19 to rotate when rotating, the bell 19 can be made to emit sound, the warning effect is further achieved, when the buzzer 6, the warning lamp 5, the gas leakage sensor A7 and the like cannot work due to power failure or damage and the like, the whole device cannot play a monitoring role, when the piston 26 moves to the position of the communicating pipe 18, gas enters the chamber on the other side of the mounting pipe 17 through the communicating pipe 18 and then enters the pressure relief air bag 27, the pressure relief effect is achieved, and under the action of the spring 25, the piston 26 returns to the initial position.

Furthermore, a rotor 20 is fixedly mounted on the rotating shaft, a stator 21 is fixed outside the rotor 20, the rotor 20 is connected with the gas leakage inductor A7 and the alarm unit through a conducting wire, the rotor 20 and the stator 21 adopt a generator technology, a certain electric quantity can be generated for the gas leakage inductor A7 and the alarm unit, and gas leakage cannot be monitored due to outage reasons.

Example 3

In this embodiment, on the basis of embodiment 2, as shown in fig. 6 to 7, the pressure relief airbag 27 is transparent, the negative pressure pipe section 28 is arranged in the communication pipe 18, the nozzle section is arranged in the negative pressure pipe section 28, the throat section is arranged at the ejection port of the nozzle section, a suction chamber is arranged between the nozzle section and the waiting pipe section in the negative pressure pipe section 28, the end of the throat section is provided with a diffusion pipe section which diffuses to the periphery, the suction chamber is connected with the pigment powder box 29 through a pipeline, during pressure relief, the coal gas in the communication pipe 18 flows faster and is ejected from the nozzle section, and then passes through the throat section and the diffusion pipe section in sequence, so that negative pressure is generated in the suction chamber, and therefore pigment powder in the pigment powder box 29 is sucked into the communication pipe 18 and then enters the pressure relief airbag 27, so that the pressure relief airbag 27 has color, and is more easily noticed by working personnel.

Example 4

In this embodiment, on the basis of embodiment 3, as shown in fig. 8 to 9, the external monitoring unit further includes an external monitoring unit, the external monitoring unit includes a second motor 30, a box 33, a third motor 35, a winding roller 36, a hose 34, a suction fan 37 and a suction nozzle 32, the second motor 30 is fixedly mounted on one housing 2, and can be fixed by screws, the fixing position is not limited too much, and can be determined according to actual conditions on site, the box 33 is fixed on an output shaft of the second motor 30, the third motor 35 is fixed on a box wall of the box 33 opposite to the second motor 30, the output shaft of the third motor 35 is fixedly connected with the winding roller 36 in the box 33, a through hole for the hose 34 to pass through is formed on the winding roller 36, the hose 34 is wound on the winding roller 36, two ends of the hose 34 respectively penetrate through a side wall of the box 33 and extend to the outside of the box 33, the suction nozzles 32 are respectively mounted at two ends of the hose 34, a heavy ball can be arranged at the position of the suction nozzle 32, a branch pipe is connected to a pipe section of the hose 34 positioned in the winding roller 36, the branch pipe extends to the outside of the winding roller 36 and is rotatably connected with an air suction opening of the suction fan 37, the branch pipe can be rotatably connected through a bearing, a gas leakage inductor B31 is arranged in the box body 33, the gas leakage inductor B31 is electrically connected with the alarm unit, an opening is formed in one side, positioned on the gas leakage inductor, of the box wall of the box body 33, and the third motor 35, the suction fan 37 and the gas leakage inductor B31 can be powered by adopting an electric brush mode;

during operation, suction fan 37 produces suction, inhale hose 34 with outside air through suction nozzle 32, then through the branch pipe, discharge to gas leakage inductor B31 department by suction fan 37, it has gas leakage not the outside to monitor, it rotates to drive box body 33 through second motor 30, box body 33 drives hose 34 and suction nozzle 32 and rotates, under the effect of centrifugal force, hose 34 and the suction nozzle 32 thereon can move to the outside, it slowly rotates around roller 36 to drive through third motor 35, can unreel hose 34 gradually, make hose 34 and shower nozzle move to the outside, the scope is bigger, can carry out the monitoring of wider range, the monitoring effect is improved.

In summary, the working principle of the invention is as follows:

when the device is used, the rotating disc 9 is driven to rotate by the first motor 10, the rotating disc 9 drives the two connecting rods 8 to move, the two connecting rods 8 respectively drive the two shells 2 to be quickly separated or enclosed, so that a worker can conveniently check the leakage positions of the joints of the gas pipeline 1 or the valves and the like, the maintenance is convenient, when the pressure in the shells is continuously increased, the piston 26 is continuously pushed, the piston 26 moves towards one side close to the partition plate 24, the piston 26 drives the movable rod 23 to move, the movable rod 23 drives the gear 22 and the rotating shaft to rotate through the rack, the rotating shaft drives the bell 19 to rotate when rotating, the bell 19 can emit sound, the warning effect is further achieved, when the buzzer 6, the warning lamp 5, the gas leakage sensor A7 and the like cannot work due to power failure or damage and other problems, the whole device cannot play a monitoring role, when the piston 26 moves to the position of the communicating pipe 18, coal gas enters the chamber on the other side of the mounting pipe 17 through the communicating pipe 18 and then enters the pressure relief air bag 27 to achieve the pressure relief effect, and the piston 26 returns to the initial position under the action of the spring 25; suction fan 37 produces the suction, inhale hose 34 with outside air through suction nozzle 32, then through the branch pipe, discharge to gas leakage inductor B31 department by suction fan 37, it has gas leakage not the outside to monitor, it rotates to drive box body 33 through second motor 30, box body 33 drives hose 34 and suction nozzle 32 and rotates, under the effect of centrifugal force, hose 34 and the suction nozzle 32 thereon can move to the outside, it slowly rotates around roller 36 to drive through third motor 35, can unreel hose 34 gradually, make hose 34 and shower nozzle move to the outside, the scope is bigger, can carry out monitoring of wider range, the monitoring effect is improved.

The above examples are only used to illustrate the technical solutions of the present invention, and do not limit the scope of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from these embodiments without making any inventive step, fall within the scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still make various combinations, additions, deletions or other modifications of the features of the embodiments of the present invention according to the situation without conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present invention, and these technical solutions also fall within the protection scope of the present invention.

Claims

1. A multifunctional gas leakage monitoring device is characterized by comprising:

2. The multifunctional gas leakage monitoring device according to claim 1, wherein the alarm unit comprises a warning lamp, a buzzer and a controller, the gas leakage sensor A is electrically connected with the controller, the controller is electrically connected with the warning lamp and the buzzer, and the warning lamp and the buzzer are fixedly arranged outside the shell.

3. The multifunctional gas leakage monitoring device according to claim 1, wherein a sealing sleeve is disposed between the contact surfaces of the two housings, one end of the sealing sleeve is fixed to one housing, the other end of the sealing sleeve is inserted into a sealing groove formed in the other housing, a plurality of horizontal threaded rods are arranged on the housing fixed to the sealing sleeve in a penetrating manner at intervals in the circumferential direction, the threaded rods are in threaded connection with the housings, insertion holes into which the threaded rods are inserted are formed in the sealing sleeve, and the diameter of the insertion holes is smaller than that of the threaded rods in a natural state.

4. The multifunctional gas leakage monitoring device according to claim 1, wherein said housing is formed of two half-shells connected by a hinge and a snap.

5. The multifunctional gas leakage monitoring device according to claim 4, wherein the inner side wall of each half-shell is semicircular, an arc-shaped air bag is fixed on the inner side wall, the central angle corresponding to the arc-shaped air bag is larger than 180 degrees and smaller than 360 degrees, an inflation/deflation pipe is connected to the arc-shaped air bag, and the arc-shaped air bags on the two half-shells are arranged in a staggered manner and are in contact with each other on the side surfaces.

6. The multifunctional gas leakage monitoring device according to claim 1, further comprising a protection assembly, wherein the protection assembly comprises a mounting tube and a pressure relief airbag, one end of the mounting tube is fixed on a housing and is communicated with the inner cavity, and the other end of the mounting tube is detachably provided with the pressure relief airbag.

7. The multifunctional gas leakage monitoring device according to claim 6, wherein the protection assembly further comprises a partition plate, a piston, a movable rod, a communicating pipe and a bell, a partition board is fixed in the installation pipe, a piston is arranged on one side of the partition board close to the shell in the installation pipe, a movable rod is fixed on the piston, the movable rod movably penetrates through the partition board and extends to the other side of the partition board, a spring is sleeved on the movable rod between the piston and the partition board, the mounting pipe is connected with a communicating pipe for communicating chambers at two sides of the partition plate, one end of the communicating pipe is connected with the part of the mounting pipe between the partition plate and the piston in a natural state, the movable rod is fixed with a rack, the installation pipe is provided with a rotating shaft which is perpendicular to the pipe wall of the installation pipe in a rotating mode, a gear meshed with the rack is fixed on a shaft section of the rotating shaft in the installation pipe, and a bell is tied on a shaft section of the rotating shaft outside the installation pipe.

8. The multifunctional gas leakage monitoring device according to claim 7, wherein a rotor is fixedly mounted on the rotating shaft, a stator is fixed outside the rotor, and the rotor is connected with the gas leakage sensor A and the alarm unit through a conducting wire.

9. The multifunctional gas leakage monitoring device according to claim 7, wherein the pressure relief airbag is transparent, the communicating pipe is provided with a negative pressure pipe section, the negative pressure pipe section is provided with a nozzle portion, a throat portion is provided at an outlet of the nozzle portion, a suction chamber is provided between the nozzle portion and the waiting portion in the negative pressure pipe section, a diffuser portion is provided at a distal end of the throat portion, and the suction chamber is connected to the toner cartridge through a pipe.

10. The multifunctional gas leakage monitoring device according to any one of claims 1 to 9, further comprising an external monitoring unit, wherein the external monitoring unit comprises a second motor, a box body, a third motor, a winding roller, a hose, a suction fan and a suction nozzle, the second motor is fixedly mounted on a housing, the box body is fixed on an output shaft of the second motor, the third motor is fixed on a box wall of the box body opposite to the second motor, the output shaft of the third motor is fixedly connected with the winding roller in the box body, the winding roller is provided with a through hole for the hose to pass through, the hose is wound on the winding roller, two ends of the hose respectively penetrate through the side wall of the box body and extend to the outside of the box body, the suction nozzle is respectively mounted at two ends of the hose, a branch pipe is connected to a pipe section of the hose in the winding roller, the branch pipe extends to the outside of the winding roller and is rotatably connected with a suction opening of the suction fan, a gas leakage sensor B is installed in the box body and electrically connected with the alarm unit, and an opening is formed in one side, located on the gas leakage sensor, of the box wall of the box body.