CN115318022B - Harmful gas monitoring and early warning system for mine - Google Patents
Harmful gas monitoring and early warning system for mine Download PDFInfo
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- CN115318022B CN115318022B CN202210548018.XA CN202210548018A CN115318022B CN 115318022 B CN115318022 B CN 115318022B CN 202210548018 A CN202210548018 A CN 202210548018A CN 115318022 B CN115318022 B CN 115318022B
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- circular ring
- cavity
- elastic cloth
- early warning
- filter screen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention belongs to the technical field of mine monitoring, in particular to a harmful gas monitoring and early warning system for a mine, which comprises a gas detector, wherein the gas detector comprises a detector, a wire inlet hole, an alarm, a sensor and a gas bin; through setting up ring, spring and elastic cloth, the air pump is being stopped by the controller control, and the appeal disappears and the elastic cloth can drive the ring and move down rapidly, makes the ring drive the spring and collide with cavity bottom inner wall, makes the spring drive the ring and vibrate from top to bottom in the cavity, and then leads to filter screen bottom dust to drop under the effect of vibration, reduces a large amount of dust and accumulates in the filter screen bottom, leads to the filtration pore to block up on the filter screen surface, causes the phenomenon that the air flow in the air pump suction sensor reduces to appear, and then influences the accuracy that the gas-sensitive element detected air composition.
Description
Technical Field
The invention belongs to the technical field of mine monitoring, and particularly relates to a harmful gas monitoring and early warning system for a mine.
Background
How to use modern high-tech means to monitor mine air so as to protect the safety of miners and national property becomes an important topic of safety expert research; while surface air enters the well from the well bore into mine air and undergoes a series of changes, mainly: the oxygen content is reduced, the content of toxic and harmful gases is increased, the dust concentration is increased, and the physical states of the air such as temperature, humidity, pressure and the like are changed;
the gas detector is one of devices for monitoring the components of the mine air, is an instrument for detecting the concentration of the gas, is suitable for dangerous places where combustible or toxic gas exists, and can continuously detect the content of the toxic gas or the combustible gas in the air for a long time; the gas detector is provided with a distributed gas sampling pump and a pumping type gas sampling pump, the main difference between the distributed gas sampling pump and the pumping type gas sampling pump is that a gas sensitive element for detecting gas components is arranged in a sensor, the distributed gas is naturally diffused to an instrument sensor for detection, and the pumping type active suction gas is conveyed to the sensor for detection, and compared with the distributed gas sampling pump, the pumping type gas sampling pump has the advantages of short response time, long detection distance and the like;
because there is a large amount of dust in the mine, so be provided with the filter screen in pumping formula gas detector bottom, in the dust entering detector in reducing the mine through the filter screen, the phenomenon that leads to the damage of spare part in the detector appears, but when pumping formula gas detector after long-time use, probably there is a large amount of dust accumulation in the filter screen bottom, leads to the filtration pore on the filter screen surface to block up to the phenomenon that causes the air pump to draw in the air flow in the sensor to reduce appears, and then influences the accuracy that the gas-sensitive element detected the air composition.
Based on the above, the invention designs a harmful gas monitoring and early warning system for mines, so as to solve the technical problems.
Disclosure of Invention
In order to make up for the deficiency, solve the existing pumping type gas detector and possibly have a large amount of dust to accumulate at the bottom of the filter screen after long-time use, cause the filter hole on the surface of the filter screen to block up, thus cause the phenomenon that the air flow of the air pump is reduced to draw into the sensor to appear, and then influence the problem that the gas sensor detects the air composition accuracy, the invention has proposed a kind of mine and used the harmful gas to monitor the early warning system.
The technical scheme adopted for solving the technical problems is as follows: the invention discloses a harmful gas monitoring and early warning system for a mine, which comprises a gas detector, wherein the gas detector comprises a detector, a wire inlet hole, an alarm, a sensor and a gas bin, the wire inlet hole is fixedly connected to the side edge of the detector, the alarm is fixedly connected to one side, far away from the wire inlet hole, of the detector, the sensor is fixedly connected to the bottom of the detector, the gas bin is arranged at the bottom of the sensor, and the gas bin comprises:
the shell is in threaded connection with the bottom of the sensor, and a cavity is formed in the shell;
the outer side of the circular ring is in sliding connection with the inner wall of the cavity, and the inner side of the circular ring is fixedly connected with a filter screen;
the end part of the elastic cloth is fixedly connected with the bottom of the circular ring, and the other end part of the elastic cloth is fixedly connected with the inner wall of the bottom of the cavity;
the spring is positioned at the outer side of the elastic cloth and is fixedly connected with the bottom of the circular ring;
and the controller controls the operation of the internal parts of the gas detector.
Preferably, the inner wall of the cavity is fixedly connected with a clamping block, and the clamping block is positioned on the upper part of the circular ring.
Preferably, the cross section of the clamping block is semicircular.
Preferably, the outer side of the circular ring is fixedly connected with a rubber ring.
Preferably, the upper surface of the circular ring is provided with a foam-rubber cushion, and the bottom of the foam-rubber cushion is connected with the upper surface of the circular ring through magnets.
Preferably, the surface of the foam-rubber cushion is provided with vent holes, and the vent holes are positioned above the filter screen.
Preferably, the vent hole is shaped as a horn mouth.
Preferably, the elastic fabric is made of oxford fabric.
Preferably, the end part of the elastic cloth is connected with the inner wall of the bottom of the cavity through a magic tape.
Preferably, the surface of the elastic cloth is fixedly connected with a bump.
The beneficial effects of the invention are as follows:
1. according to the harmful gas monitoring and early warning system for the mine, the circular ring, the spring and the elastic cloth are arranged, the controller controls the air pump to stop, attractive force disappears, the elastic cloth can rapidly drive the circular ring to move downwards, the circular ring drives the spring to collide with the inner wall of the bottom of the cavity, the spring drives the circular ring to vibrate up and down in the cavity, dust at the bottom of the filter screen is further caused to fall off under the effect of vibration, a large amount of dust is reduced to accumulate at the bottom of the filter screen, the filter holes on the surface of the filter screen are blocked, the phenomenon that the air flow pumped into the sensor by the air pump is reduced occurs, and the accuracy of detecting air components by the gas sensor is further affected.
2. According to the harmful gas monitoring and early warning system for the mine, the clamping blocks are arranged, the multi-layer clamping blocks are uniformly arranged on the inner wall of the cavity, the clamping blocks and the inner wall of the cavity form the rugged path, when the suction force is eliminated due to the stop of the air pump, the elastic cloth can rapidly drive the circular ring to move downwards, and when the circular ring passes through the rugged path, the outer side of the circular ring is indirectly contacted with the clamping blocks, so that the circular ring is integrally vibrated, dust accumulated at the bottom of the filter screen is accelerated to shake off, and the working efficiency of dredging the filter holes of the filter screen is improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of a gas detector of a harmful gas monitoring and early warning system for mines in the invention;
FIG. 2 is a cross-sectional view of a gas cartridge of the gas detector of FIG. 1;
FIG. 3 is an enlarged view of the structure of FIG. 2 at A;
FIG. 4 is a schematic view of the related structure of the foam pad of FIG. 2;
FIG. 5 is an enlarged view of the structure at B in FIG. 4;
in the figure: 1. a detector; 2. a wire inlet hole; 3. an alarm; 4. a sensor; 5. a housing; 51. a cavity; 511. a clamping block; 52. a circular ring; 521. a filter screen; 522. a rubber ring; 523. a sponge cushion; 524. a vent hole; 53. an elastic cloth; 531. a bump; 54. and (3) a spring.
Detailed Description
For the purpose of making the objects, technical means and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The harmful gas monitoring and early warning system for the mine solves the problems that after the existing pumping type gas detector is used for a long time, a large amount of dust is possibly accumulated at the bottom of a filter screen, and a filter hole on the surface of the filter screen is blocked, so that the air flow pumped into a sensor by an air pump is reduced, and the accuracy of detecting air components by a gas sensor is affected;
the technical scheme in the embodiment of the invention aims to solve the technical problems, and the overall thought is as follows:
by arranging the circular ring 52, the spring 54 and the elastic cloth 53, as the filter holes of the filter screen 521 are in a blocking state, air is prevented from entering the cavity 51 through the filter screen 521, so that the air pump generates attractive force on the surface of the filter screen 521, the filter screen 521 drives the circular ring 52 to move on the inner wall of the cavity 51 under the action of the attractive force, the circular ring 52 drives the spring 54 to move, and the circular ring 52 pulls the elastic cloth 53 to stretch continuously; the controller controls the air pump to stop, attractive force disappears, the elastic cloth 53 can rapidly drive the circular ring 52 to move downwards, the circular ring 52 drives the spring 54 to collide with the inner wall of the bottom of the cavity 51, the spring 54 drives the circular ring 52 to vibrate up and down in the cavity 51 due to elasticity of the spring 54, and therefore dust at the bottom of the filter screen 521 falls off under the action of vibration.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 5, the harmful gas monitoring and early warning system for mines comprises a gas detector, wherein the gas detector comprises a detector 1, a wire inlet hole 2, an alarm 3, a sensor 4 and a gas bin, the wire inlet hole 2 is fixedly connected to the side edge of the detector 1, the alarm 3 is fixedly connected to the side, far away from the wire inlet hole 2, of the detector 1, the sensor 4 is fixedly connected to the bottom of the detector 1, the gas bin is arranged at the bottom of the sensor 4, and the gas bin comprises:
the shell 5 is in threaded connection with the bottom of the sensor 4, and a cavity 51 is formed in the shell 5;
the outer side of the circular ring 52 is in sliding connection with the inner wall of the cavity 51, and a filter screen 521 is fixedly connected with the inner side of the circular ring 52;
the end part of the elastic cloth 53 is fixedly connected with the bottom of the circular ring 52, and the other end part of the elastic cloth 53 is fixedly connected with the inner wall of the bottom of the cavity 51;
the spring 54 is positioned outside the elastic cloth 53 and is fixedly connected with the bottom of the circular ring 52;
and the controller controls the operation of the internal parts of the gas detector.
In the using process of the existing gas detector, the gas detector is firstly placed at a proper position on the mine wall, a notch is formed in the surface of the bottom plate of the detector 1, and nails penetrate through the notch to be in contact with the inner wall of the mine, so that the detector 1 is fixed on the mine wall through the nails; one side of the detector 1 is fixedly connected with a wire inlet hole 2, the other side of the detector 1 is fixedly connected with an alarm 3, the inside of the alarm 3 comprises a lamplight alarm and an acoustic alarm, the end parts of two core cables are connected with parts inside the detector 1 through the wire inlet hole 2, and the other end parts of the two core cables are connected with a flammable toxic gas alarm controller outside the detector 1;
when the device works, the power supply of the flammable toxic gas alarm controller is connected, so that the flammable toxic gas alarm controller starts the detector 1 through the two-core cable wires, the controller in the detector 1 controls the air pump to start, the bottom of the detector 1 is fixedly connected with the top of the sensor 4, the bottom of the sensor 4 is provided with an opening, a filter screen is arranged at the opening, a gas sensitive element is arranged in the sensor 4, when the air pump is started, surrounding air components pass through the opening and are pumped into the sensor 4, and then the air is detected through the gas sensitive element, so that the content of toxic gas in the air is ensured to be in a safe range; if the air exceeds the standard, the controller in the detector 1 starts an optical alarm and an acoustic alarm, and the controller feeds back the detection condition to the flammable and toxic gas alarm controller, so that the flammable and toxic gas alarm controller controls the exhaust fan, the electromagnetic valve, the spraying system and the acousto-optic alarm lamp to start, thereby dredging the air in the mine, warning the staff and evacuating the staff; however, after the detector 1 is used for a long time, a large amount of dust may accumulate on the surface of the filter screen at the opening, so that the filter holes on the surface of the filter screen are blocked, and the air flow pumped into the sensor 4 by the air pump is reduced, thereby affecting the accuracy of detecting the air components by the gas sensor.
In the invention, the inner wall of the opening at the bottom of the sensor 4 is provided with threads, so that the bottom of the sensor 4 is in threaded connection with the outer side surface of the top of the shell 5, and the shell 5 is in detachable connection with the sensor 4; the casing 5 is internally provided with a cavity 51, the upper end and the lower end of the cavity 51 are both openings, the opening at the upper part of the cavity 51 corresponds to the opening at the bottom of the sensor 4, a circular ring 52 is arranged in the cavity 51, the circular ring 52 is made of a corrosion-resistant plastic material, such as polytetrafluoroethylene, the plastic material is light in weight, and the circular ring 52 has the characteristics of heat resistance, cold resistance, corrosion resistance and the like, so that the service life of the circular ring 52 is prolonged; the inner side of the circular ring 52 is fixedly connected with a filter screen 521, the outer side of the circular ring 52 is in sliding connection with the inner wall of the cavity 51, the bottom of the circular ring 52 is connected with the inner wall of the bottom of the cavity 51 through an elastic cloth 53, and the end part of the elastic cloth 53 is positioned at the joint of the circular ring 52 and the filter screen 521, so that the elastic cloth 53 surrounds between the bottom of the filter screen 521 and the bottom of the cavity 51, springs 54 are uniformly arranged between the outer side of the elastic cloth 53 and the side wall of the cavity 51, the end part of each spring 54 is fixedly connected with the bottom of the circular ring 52, and one end of each spring 54 far away from the circular ring 52 is in a contact and non-fixedly connected state with the inner wall of the bottom of the cavity 51;
in the initial state, the filter holes of the filter screen 521 are in an unblocked state, the controller controls the air pump to start, so that the air pump sucks external air into the cavity 51 through the opening at the bottom of the cavity 51, the air moves into the sensor 4 through the filter screen 521 and then is detected by the gas sensitive element in the sensor 4, the air can directly pass through the filter holes due to the unblocked state of the filter holes, the circular ring 52 is not moved in the cavity 51 due to the air flow under the action of induced draft, the filter screen 521 is in a static state in the cavity 51, and the circular ring 52 is made of plastic materials, the weight is light and the spring 54 is not easy to bend, so that the spring 54 supports the circular ring 52 in the cavity 51, the distance between the bottom of the circular ring 52 and the bottom of the cavity 51 is equal to the length of the elastic cloth 53, and the spring 54 drives the elastic cloth 53 to be in a straightened and non-tensed state through the circular ring 52;
when the air pump is in work, the filter holes of the filter screen 521 are in a blocking state, the controller controls the air pump to start, the air pump sucks air to the periphery through the cavity 51, but because the filter holes are in a blocking state, air is prevented from entering the cavity 51 through the filter screen 521, so that the air pump generates attractive force on the surface of the filter screen 521, the filter screen 521 is fixedly connected with the inner side of the circular ring 52, the outer side of the circular ring 52 is in sliding connection with the inner wall of the cavity 51, the bottom of the circular ring 52 is connected with the bottom of the cavity 51 through the elastic cloth 53, and therefore, under the action of attractive force, the air pump drives the circular ring 52 to move on the inner wall of the cavity 51 through the filter screen 521, the circular ring 52 drives the spring 54 to move, the circular ring 52 pulls the elastic cloth 53 to stretch continuously, and the non-tightening state is changed into the tightening state; the controller controls the air pump to stop, so that the attractive force of the air pump on the surface of the circular ring 52 disappears, then the tightened elastic cloth 53 has downward pulling force on the circular ring 52, so that the elastic cloth 53 drives the circular ring 52 to move downwards on the inner wall of the cavity 51, the elastic force in the elastic cloth 53 is rapidly released due to the sudden disappearance of the attractive force, the elastic cloth 53 drives the circular ring 52 to move downwards rapidly, the circular ring 52 drives the spring 54 to collide with the inner wall of the bottom of the cavity 51, the shape of the spring 54 is further changed, and the spring 54 also pushes the circular ring 52 to move upwards in order to restore deformation, so that the circular ring 52 moves upwards and downwards on the movement track of the circular ring 52 in the cavity 51 under the action of the spring 54 and the elastic cloth 53 in the process of restoring the original position, the spring 54 repeatedly collides with the inner wall of the cavity 51, so that the phenomenon of vibration occurs on the surface of the circular ring 52, and the dust at the bottom of the filter screen 521 falls off under the action of vibration, and the effect of automatically cleaning the filter holes of the filter screen 521 is achieved.
According to the invention, the circular ring 52, the spring 54 and the elastic cloth 53 are arranged, and as the filter holes of the filter screen 521 are in a blocking state, air is prevented from entering the cavity 51 through the filter screen 521, so that the air pump generates attractive force on the surface of the filter screen 521, the filter screen 521 drives the circular ring 52 to move on the inner wall of the cavity 51 under the action of the attractive force, the circular ring 52 drives the spring 54 to move, and the circular ring 52 pulls the elastic cloth 53 to stretch continuously;
the controller controls the air pump to stop, attractive force disappears, the elastic cloth 53 can rapidly drive the circular ring 52 to move downwards, the circular ring 52 drives the spring 54 to collide with the inner wall of the bottom of the cavity 51, the spring 54 drives the circular ring 52 to vibrate up and down in the cavity 51 due to elasticity of the spring 54, and therefore dust at the bottom of the filter screen 521 falls off under the action of vibration.
As an embodiment of the present invention, as shown in fig. 2, a clamping block 511 is fixedly connected to the inner wall of the cavity 51, and the clamping block 511 is located at the upper portion of the ring 52;
as an embodiment of the present invention, as shown in fig. 3, the cross-section of the clamping block 511 is semicircular;
as an embodiment of the present invention, as shown in fig. 2 and fig. 3, a rubber ring 522 is fixedly connected to the outer side of the circular ring 52;
in the invention, a plurality of layers of clamping blocks 511 are uniformly arranged on the inner wall of a cavity 51, the cross section of each layer of clamping block 511 is semicircular, and gaps are arranged between each layer of clamping block 511; when the filtering holes of the filtering net 521 are blocked, the air pump will generate attractive force to the surface of the circular ring 52, so that the circular ring 52 moves on the inner wall of the cavity 51, and because the circular ring 52 has upward traction force to the elastic cloth 53 and downward traction force to the circular ring 52, the circular ring 52 slowly moves upwards on the inner wall of the cavity 51 under the action of attractive force, and when the circular ring 52 passes through the multi-layer clamping blocks 511, the clamping blocks 511 and the inner wall of the cavity 51 form uneven paths, and the paths contact with the outer side of the circular ring 52, so that the vibration amplitude of the circular ring 52 is small, and dust accumulated at the bottom of the filtering net 521 is difficult to shake off;
when the suction force disappears due to the stop of the air pump, the elastic cloth 53 drives the circular ring 52 to move downwards rapidly through the self elastic force, and the moving speed of the circular ring 52 influences the vibration amplitude of the circular ring 52 on the rugged path, so that when the rugged path passes, the circular ring 52 is indirectly contacted with the clamping block 511 through the outer side, the vibration amplitude of the circular ring 52 is increased, and dust accumulated at the bottom of the filter screen 521 is accelerated to shake off; a rubber ring 522 is arranged on the outer side of the circular ring 52, and the outer side of the circular ring 52 is tightly contacted with the inner wall of the cavity 51 and the clamping block 511 through the rubber ring 522, so that the circular ring 52 is in sliding sealing connection on the inner wall of the cavity 51; meanwhile, the cross section of the clamping block 511 is semicircular, friction force between the clamping block 511 and the outer side of the circular ring 52 is reduced, and smoothness of movement of the outer side of the circular ring 52 on the surface of the clamping block 511 is improved.
According to the invention, the clamping blocks 511 are uniformly arranged on the inner wall of the cavity 51, the clamping blocks 511 and the inner wall of the cavity 51 form an uneven path, when the suction force is eliminated due to stopping of the air pump, the elastic cloth 53 can rapidly drive the circular ring 52 to move downwards, and when the air pump passes through the uneven path, the outer side of the circular ring 52 is indirectly contacted with the clamping blocks 511, so that the whole circular ring 52 vibrates, dust accumulated at the bottom of the filter screen 521 is accelerated to shake off, and the working efficiency of dredging the filter holes of the filter screen 521 is improved.
As an embodiment of the present invention, as shown in fig. 4, a sponge pad 523 is disposed on the upper surface of the ring 52, and the bottom of the sponge pad 523 is connected to the upper surface of the ring 52 through a magnet;
as an embodiment of the present invention, as shown in fig. 4, the surface of the foam-rubber cushion 523 is provided with ventilation holes 524, and the ventilation holes 524 are located above the filter screen 521;
as an embodiment of the present invention, as shown in fig. 5, the vent 524 is configured as a bell mouth;
in the invention, a foam-rubber cushion 523 is arranged on the upper surface of a circular ring 52, an iron sheet is arranged at the bottom of the foam-rubber cushion 523, and a magnet is fixedly connected on the upper surface of the circular ring 52, so that the foam-rubber cushion 523 and the circular ring 52 are connected through the magnet, and the foam-rubber cushion 523 and the circular ring 52 are detachably connected; the humidity of the mine air may influence the detection result of the gas sensor and may damage the parts inside the detector 1, so that the sponge cushion 523 absorbs the moisture in the air, the humidity of the air is reduced to influence the accuracy of detecting the harmful gas by the gas sensor, and the service life of the gas detector 1 is prolonged;
and vent holes 524 are formed in the surface of the foam-rubber cushion 523, under the action of air suction, air is in contact with the gas sensitive element through the filter screen 521 and the vent holes 524, on one hand, the resistance of the foam-rubber cushion 523 to the air flow is reduced by the vent holes 524, on the other hand, the contact area of the foam-rubber cushion 523 and the air is increased, the air moisture absorption speed of the foam-rubber cushion 523 is accelerated, the vent holes 524 are arranged into horn mouths, the air absorption range of the vent holes 524 is increased under the action of air suction, the air passing through the inside of the foam-rubber cushion 523 is accelerated, and when the air passes through the vent holes 524, the inclined inner wall of the vent holes 524 further increases the contact area with the air, and the air moisture absorption efficiency of the foam-rubber cushion 523 is improved.
According to the invention, the foam-rubber cushion 523 and the vent holes 524 are arranged, when air is in contact with the foam-rubber cushion 523 through the filter screen 521, the foam-rubber cushion 523 absorbs moisture in the air, the humidity of the air is reduced to enter the sensor 4 and the detector 1, the corrosion of parts in the detector 1 is possibly caused, and the vent holes 524 are arranged on the surface of the foam-rubber cushion 523, so that the contact area between the foam-rubber cushion 523 and the air is increased, the speed of the foam-rubber cushion 523 absorbing the moisture in the air is increased, and meanwhile, the foam-rubber cushion 523 is detachably connected with the upper surface of the circular ring 52, so that after the foam-rubber cushion 523 is used for a period of time, the foam-rubber cushion 523 is replaced, the contact between the dry air and the gas sensor is ensured, and the accuracy of the gas sensor for detecting harmful gas is reduced due to the influence of the humidity of the air.
As an embodiment of the present invention, as shown in fig. 2, the material of the elastic fabric 53 is oxford fabric material;
as an embodiment of the present invention, as shown in fig. 2, the end of the elastic fabric 53 is connected to the inner wall of the bottom of the cavity 51 through a magic tape;
as an embodiment of the present invention, as shown in fig. 4 and as shown in fig. 5, the surface of the elastic cloth 53 is fixedly connected with a bump 531;
in the invention, one end of the elastic cloth 53 far away from the bottom of the circular ring 52 is provided with a male magic tape, the inner wall of the opening at the bottom of the cavity 51 is fixedly connected with a female magic tape, the inner surface of the male magic tape is woven with a plurality of loops, the inner side surface of the female magic tape is woven with a plurality of small hooks, the male magic tape is aligned with the female magic tape and then lightly pressed, the loops are hooked by the hooks, the male magic tape is connected with the female magic tape, the end part of the elastic cloth 53 is connected with the inner wall at the bottom of the cavity 51 through the male magic tape and the female magic tape, the end part of the elastic cloth 53 is connected with the inner wall at the bottom of the cavity 51 in a detachable way, after a period of use, the end part of the elastic cloth 53 is disconnected with the inner wall at the bottom of the cavity 51 through the separation of the male magic tape and then the elastic cloth 53 is taken out from the cavity 51, the inner side of the elastic cloth 53 can be cleaned, and the surface of the elastic cloth 53 can be cleaned;
the oxford fabric 53 is made of oxford fabric material, has the characteristics of good elasticity, good waterproofness, wear resistance and the like, and compared with plush fabric, the plush fabric generates static electricity due to mutual friction among surface fluff, so that dust in air is adsorbed on the surface of the plush fabric, the oxford fabric has the anti-static characteristic, and the dust is reduced to be adsorbed on the surface of the oxford fabric 53; meanwhile, the inner side surface of the elastic cloth 53 is uniformly provided with the convex blocks 531, when the air pump pumps ambient air through the cavity 51, part of the air moves towards the filter screen 521 along the surface of the elastic cloth 53, and when the air flows between the convex blocks 531, gaps between the convex blocks 531 can prevent dust in the air from moving, and the dust stays between the convex blocks 531; when the ring 52 vibrates in the cavity 51, the ring 52 drives the elastic cloth 53 to shake, so that dust between the protrusions 531 breaks away from the elastic cloth 53 under the shaking effect, and the elastic cloth 53 has an air purifying effect through the protrusions 531, so that the frequency of blocking the filter net 521 caused by accumulation of a large amount of dust at the bottom of the filter net 521 is reduced.
According to the invention, the magic tape and the convex blocks 531 are arranged, when air flows between the convex blocks 531, gaps between the convex blocks 531 can prevent dust in the air from moving, dust stays between the convex blocks 531, when the circular ring 52 vibrates in the cavity 51, the circular ring 52 drives the elastic cloth 53 to shake, so that the dust between the convex blocks 531 breaks away from the elastic cloth 53 under the shaking effect, the inner side surface of the elastic cloth 53 is cleaned, meanwhile, the end part of the elastic cloth 53 and the inner wall of the cavity 51 are detachably connected through the arrangement of the magic tape, after the elastic cloth 53 is used for a period of time, the elastic cloth 53 can be taken out from the cavity 51 and cleaned inside the elastic cloth 53, residues between the convex blocks 531 are reduced, the air purifying effect of the elastic cloth 53 through the convex blocks 531 is improved, a large amount of dust is accumulated at the bottom of a filter screen 521, and the filter screen is blocked.
The specific working procedure is as follows:
in the invention, the bottom of the sensor 4 is in threaded connection with the top of the shell 5, the foam-rubber cushion 523 is connected with the magnet on the upper surface of the circular ring 52, and the end part of the elastic cloth 53 is connected with the inner wall of the bottom of the cavity 51 through a magic tape, so that the sensor 4 is detachably connected with the shell 5, the foam-rubber cushion 523 is detachably connected with the circular ring 52, and the elastic cloth 53 is detachably connected with the cavity 51;
when the filtering holes of the filtering net 521 are in an unblocked state, the controller controls the air pump to start, so that the air pump sucks external air into the cavity 51 through the opening at the bottom of the cavity 51, the air moves into the sensor 4 through the filtering net 521 and the foam-rubber cushion 523 and then is detected by the gas sensitive element in the sensor 4, and the air can directly pass through the filtering holes due to the unblocked state of the filtering holes, so that under the action of induced draft, the circular ring 52 does not move in the cavity 51 by the air flow, thereby the filtering net 521 is in a static state in the cavity 51, the circular ring 52 is supported by the spring 54 in the cavity 51, and the distance between the bottom of the circular ring 52 and the bottom of the cavity 51 is equal to the length of the elastic cloth 53, so that the elastic cloth 53 is driven by the spring 54 through the circular ring 52 to be in a straightened and non-tightening state;
when the filtering holes of the filter screen 521 are in a blocking state, the controller controls the air pump to start, the air pump sucks air to the surrounding through the cavity 51, but because the filtering holes are in a blocking state, air is prevented from entering the cavity 51 through the filter screen 521, so that the air pump generates attractive force on the surface of the filter screen 521, under the action of the attractive force, the air pump drives the circular ring 52 to move on the inner wall of the cavity 51 through the filter screen 521, the circular ring 52 drives the spring 54 to move, the circular ring 52 pulls the elastic cloth 53 to stretch continuously, and the non-tightening state is changed into the tightening state; the controller controls the air pump to stop, so that the attractive force of the air pump on the surface of the circular ring 52 disappears, and then the stretched elastic cloth 53 has downward pulling force on the circular ring 52, so that the elastic cloth 53 drives the circular ring 52 to move downwards on the inner wall of the cavity 51, and the elastic force in the elastic cloth 53 is rapidly released due to the sudden disappearance of the attractive force, so that the elastic cloth 53 drives the circular ring 52 to move downwards rapidly; when the elastic cloth 53 is moved to the original position, the circular ring 52 moves up and down along the movement track of the circular ring 52 in the cavity 51, so that the spring 54 repeatedly collides with the inner wall of the cavity 51 until the original state is restored.
The front, rear, left, right, up and down are based on the viewing angle of the person, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a harmful gas monitoring early warning system for mine, this system includes the gas detection appearance, the gas detection appearance includes detector (1), entrance hole (2), alarm (3), sensor (4) and gas storehouse, entrance hole (2) have been linked firmly to detector (1) side, detector (1) keep away from one side of entrance hole (2) and have linked firmly alarm (3), detector (1) bottom has linked firmly sensor (4), a serial communication port, sensor (4) bottom is provided with the gas storehouse, the gas storehouse includes:
the shell (5) is in threaded connection with the bottom of the sensor (4), and a cavity (51) is formed in the shell (5);
the outer side of the circular ring (52) is in sliding connection with the inner wall of the cavity (51), and a filter screen (521) is fixedly connected with the inner side of the circular ring (52);
the end part of the elastic cloth (53) is fixedly connected with the bottom of the circular ring (52), and the other end part of the elastic cloth (53) is fixedly connected with the inner wall of the bottom of the cavity (51);
the spring (54) is positioned at the outer side of the elastic cloth (53) and is fixedly connected with the bottom of the circular ring (52);
the controller controls the operation of the internal parts of the gas detector;
the inner wall of the cavity (51) is fixedly connected with a clamping block (511), and the clamping block (511) is positioned on the upper portion of the circular ring (52).
2. The harmful gas monitoring and early warning system for a mine according to claim 1, wherein: the cross section of the clamping block (511) is semicircular.
3. The harmful gas monitoring and early warning system for a mine according to claim 1, wherein: the outer side of the circular ring (52) is fixedly connected with a rubber ring (522).
4. A harmful gas monitoring and early warning system for mines according to claim 3, wherein a foam-rubber cushion (523) is arranged on the upper surface of the circular ring (52), and the bottom of the foam-rubber cushion (523) is connected with the upper surface of the circular ring (52) through a magnet.
5. The harmful gas monitoring and early warning system for a mine according to claim 4, wherein: the surface of the foam-rubber cushion (523) is provided with vent holes (524), and the vent holes (524) are positioned above the filter screen (521).
6. The harmful gas monitoring and early warning system for a mine according to claim 5, wherein: the vent hole (524) is shaped as a bell mouth.
7. The harmful gas monitoring and early warning system for a mine according to claim 1, wherein: the elastic fabric (53) is made of oxford fabric.
8. The harmful gas monitoring and early warning system for a mine according to claim 7, wherein: the end part of the elastic cloth (53) is connected with the inner wall of the bottom of the cavity (51) through a magic tape.
9. The harmful gas monitoring and early warning system for a mine according to claim 8, wherein: the surface of the elastic cloth (53) is fixedly connected with a bump (531).
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| CN209069898U (en) * | 2018-11-02 | 2019-07-05 | 天津市恒一机电科技有限公司 | A kind of mining environment monitoring device |
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