阅读说明：本技术 一种甲烷传感器 (Methane sensor ) 是由 不公告发明人 于 2019-09-11 设计创作，主要内容包括：本发明属于传感器技术领域,具体的说是一种甲烷传感器,包括外壳,外壳一侧设有把手,外壳内依次设有处理器、激光传感器和抽风机；本发处理器与激光传感器电连接；本发抽风机的进气口连通有检测管,激光传感器的探头贯穿并伸入检测管；本发探头远离进气口的一侧设有可拆卸的过滤网；本发检测管伸出外壳外部并与外界大气连通；本发抽风机的排气管伸出外壳；本发明采用抽气机对航巷道内的空气主动进行抽取后检测甲烷含量,提高激光传感器的响应速度,同时采用过滤网对巷道内的空气粉尘进行过滤,可以减少粉尘对激光传感器的探头的污染,提高激光传感器的灵敏度和使用寿命。(The invention belongs to the technical field of sensors, and particularly relates to a methane sensor which comprises a shell, wherein a handle is arranged on one side of the shell, and a processor, a laser sensor and an exhaust fan are sequentially arranged in the shell; the laser processor is electrically connected with the laser sensor; an air inlet of the exhaust fan is communicated with a detection pipe, and a probe of the laser sensor penetrates through and extends into the detection pipe; a detachable filter screen is arranged on one side of the probe, which is far away from the air inlet; the detection tube extends out of the shell and is communicated with the outside atmosphere; the exhaust pipe of the hair exhaust fan extends out of the shell; the air extractor is adopted to actively extract air in the navigation tunnel and then detect the methane content, so that the response speed of the laser sensor is improved, and meanwhile, the filter screen is adopted to filter air dust in the tunnel, so that the pollution of the dust to the probe of the laser sensor can be reduced, the sensitivity of the laser sensor is improved, and the service life of the laser sensor is prolonged.)

1. a methane sensor, characterized by: comprises a shell (1), one side of the shell (1) is provided with a handle (11), and a processor (12), a laser sensor (13) and an exhaust fan (14) are sequentially arranged in the shell (1); the processor (12) is electrically connected with the laser sensor (13); an air inlet (15) of the exhaust fan (14) is communicated with the detection pipe (2), and a probe (16) of the laser sensor (13) penetrates through and extends into the detection pipe (2); a detachable filter screen (21) is arranged on one side of the probe (16) far away from the air inlet (15); the detection tube (2) extends out of the shell (1) and is communicated with the outside atmosphere; an exhaust pipe (17) of the exhaust fan (14) extends out of the shell (1).

2. A methane sensor according to claim 1, wherein: one end of the detection pipe (2) far away from the air inlet pipe is communicated with a plurality of stages of telescopic pipes (3), and one end of each telescopic pipe (3) far away from the detection pipe (2) is provided with an air inlet (31).

3. A methane sensor according to claim 2, wherein: the diameter of the air inlet (31) is gradually increased along with the reduction of the pipe diameter of the extension pipe (3).

4. A methane sensor according to claim 3, characterized in that: the pipe wall of the telescopic pipe (3) is internally provided with a vent pipe (32), and the vent pipe (32) is arranged in a Z shape; the adjacent telescopic pipes (3) are communicated through a vent pipe (32); a three-way valve (18) is arranged on the exhaust pipe (17), the three-way valve (18) is controlled by a handle (19), and the three-way valve (18) is communicated with a vent pipe (32) in the telescopic pipe (3) with the largest diameter; the three-way valve (18) is used for controlling the gas flow direction of the exhaust pipe (17).

5. a methane sensor according to claim 3, characterized in that: a groove (33) is formed in one side, close to the periphery of the telescopic pipe (3), of the air inlet (31), a cover plate (34) is hinged in the groove (33), and the cover plate (34) is used for sealing the air inlet (31); a tension spring (35) is arranged in the air inlet (31), one end of the tension spring (35) is fixedly connected with the inner wall of the extension tube (3), and the other end of the tension spring (35) is fixedly connected with the cover plate (34); a push rod (36) is connected in the tube wall of the telescopic tube (3) at one side of the air inlet (31) in a sliding manner, and an inclined plane is arranged at one end of the push rod (36) extending out of the inner wall of the telescopic tube (3); the ejector rod (36) is used for ejecting the cover plate (34).

6. A methane sensor according to claim 5, characterized in that: one end of the air inlet (31) close to the cover plate (34) is provided with a conical countersunk head (37); and a rubber boss (38) matched with the conical countersunk head (37) is arranged at the position of the cover plate (34) corresponding to the conical countersunk head (37).

Technical Field

The invention belongs to the technical field of sensors, and particularly relates to a methane sensor.

Background

The methane sensor is used for continuously monitoring the methane concentration in coal mine roadways, mining working faces, goafs, return air roadways, electromechanical chambers and the like in a coal mine safety detection system, can automatically give out sound and light alarms when the methane concentration exceeds the limit, can be used for carrying underground coal mine operators, methane detection personnel, underground managers and the like, and can also be used for fixing the places.

The fixed methane that carries on of multiple spot that adopts in current tunnel detects to transmit for surveillance center through the circuit, nevertheless laser methane sensor is when using, because the collection head exposes the outside, after long-time use, can adsorb a lot of dusts on the collection head, can receive the influence when carrying out methane information acquisition and lead to information acquisition inaccurate. Workers need to check and overhaul, and the workers hand the mobile methane sensor to inspect the roadway so as to compare the methane concentration data and find out the methane sensor with the abnormal data fixed point for maintenance and replacement to ensure that the roadway methane detection system works normally; but present handheld methane sensor test probe is direct and air contact, accumulates the dust easily and influences the precision, and handheld methane sensor simultaneously, detection distance is short, can not in time detect data when meetting the position of methane concentration sudden change, causes the personnel of patrolling and examining to miss and goes into the high concentration methane region easily, causes the potential safety hazard.

Disclosure of Invention

The invention provides a methane sensor, which aims to make up the defects of the prior art and solve the problems that the existing handheld methane sensor detection probe is directly contacted with air, dust is easy to accumulate to influence the precision, meanwhile, the handheld methane sensor is short in detection distance, data cannot be detected in time when encountering a position with a sudden methane concentration change, inspection personnel are easy to mistakenly enter a high-concentration methane area, and potential safety hazards are caused.

the technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a methane sensor which comprises a shell, wherein a handle is arranged on one side of the shell, and a processor, a laser sensor and an exhaust fan are sequentially arranged in the shell; the processor is electrically connected with the laser sensor; the air inlet of the exhaust fan is communicated with a detection pipe, and a probe of the laser sensor penetrates through and extends into the detection pipe; a detachable filter screen is arranged on one side of the probe, which is far away from the air inlet; the detection tube extends out of the outer shell and is communicated with the outside atmosphere; the exhaust pipe of the exhaust fan extends out of the shell; when the device is used, a handle is held by a hand to open a power supply of the exhaust fan and the laser sensor, the exhaust fan pumps air in a mine roadway into the detection pipe, dust in the air is filtered by the filter screen, the air with the dust filtered flows through the probe, so that the laser sensor detects the content of methane in the air, data of the laser sensor is displayed by the display after being processed by the processor, a maintainer records and stores the position of data and data acquisition, and finally the recorded data is compared with the data of the methane fixed-point detector, so that the methane fixed-point detector with problems can be maintained and replaced conveniently; adopt the air extractor to detect methane content after extracting the air in the navigation tunnel, change passive detection to initiative detection, improve laser sensor's response speed, adopt the filter screen to filter the air dust in the tunnel simultaneously, can reduce the pollution of dust to laser sensor's probe, improve laser sensor's sensitivity and life.

Preferably, one end of the detection pipe, which is far away from the air inlet pipe, is communicated with a multi-stage telescopic pipe, and one end of the telescopic pipe, which is far away from the detection pipe, is provided with an air inlet; can prolong laser sensor's detection distance through adopting multistage flexible pipe, can also reduce the equipment volume simultaneously, hold the handle when using, throw away flexible pipe hard, increase air intake and laser sensor's distance behind the extension of flexible pipe, the air intake on every flexible pipe all can the air inlet simultaneously, has improved the sampling degree of consistency of air, further increases the degree of accuracy that laser sensor detected methane content in the air.

Preferably, the diameter of the air inlet is gradually increased along with the reduction of the pipe diameter of the telescopic pipe; after the multi-stage telescopic pipes are extended, the smaller the pipe diameter, the longer the distance between the air inlet on the telescopic pipe and the probe is, and the air inlet volume of each air inlet can be relatively uniform by gradually increasing the diameter of the air inlet along with the reduction of the pipe diameter of the telescopic pipe, so that the uniformity of sampling air in the detection pipe is ensured, and the detection precision of the laser sensor is improved.

Preferably, the pipe wall of the extension pipe is internally provided with a vent pipe which is arranged in a Z shape; the adjacent telescopic pipes are communicated through a vent pipe; the exhaust pipe is provided with a three-way valve which is controlled by a handle and communicated with a vent pipe in the telescopic pipe with the largest diameter; the three-way valve is used for controlling the gas flow direction of the exhaust pipe; after the methane sensor is used, the three-way valve is controlled through the handle, air in the exhaust pipe is filled into the vent pipe, and the multi-stage telescopic pipes retract after the vent pipe is filled with air, so that the volume of the methane sensor is reduced, and the methane sensor is convenient to carry.

Preferably, one side of the air inlet close to the periphery of the telescopic pipe is provided with a groove, a cover plate is hinged in the groove, and the cover plate is used for sealing the air inlet; a tension spring is arranged in the air inlet, one end of the tension spring is fixedly connected with the inner wall of the extension tube, and the other end of the tension spring is fixedly connected with the cover plate; the pipe wall of the telescopic pipe on one side of the air inlet is connected with a mandril in a sliding way, and one end of the mandril extending out of the inner wall of the telescopic pipe is provided with an inclined plane; the ejector rod is used for ejecting the cover plate; the cover plate is tensioned through the tension spring, the air inlet is sealed, air leakage of the air inlet during recovery of the telescopic pipe is prevented, and recovery efficiency of the telescopic pipe is reduced; when the telescopic pipe is completely extended out, the telescopic pipe with the smaller diameter extrudes the ejector rod on the telescopic pipe with the larger diameter, the ejector rod is ejected outwards under the action of the inclined plane, the cover plate is opened, and then the air inlet hole is opened to carry out normal detection on methane in the roadway.

Preferably, one end of the air inlet close to the cover plate is provided with a conical countersunk head; a rubber boss matched with the conical countersunk head is arranged at the position of the cover plate corresponding to the conical countersunk head; through the cooperation of rubber boss and toper countersunk head, further increase the leakproofness to the air intake when extension spring pulling apron to increase the speed of multistage flexible pipe withdrawal, save time.

The invention has the following beneficial effects:

1. According to the methane sensor, the air in the navigation tunnel is actively extracted by the air extractor, the methane content is detected, the response speed of the laser sensor is improved, meanwhile, air dust in the tunnel is filtered by the filter screen, the pollution of the dust to a probe of the laser sensor can be reduced, the sensitivity of the laser sensor is improved, and the service life of the laser sensor is prolonged.

2. According to the methane sensor, the detection distance of the laser sensor can be prolonged by adopting the multistage telescopic pipes, the size of equipment can be reduced, air can be fed into the air inlet of each telescopic pipe, the sampling uniformity of air is improved, and the accuracy of the laser sensor in detecting the methane content in the air is further improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a schematic diagram of the operation of the present invention;

In the figure: the device comprises a shell 1, a handle 11, a processor 12, a laser sensor 13, an exhaust fan 14, an air inlet 15, a probe 16, a detection pipe 2, a filter screen 21, an exhaust pipe 17, an extension pipe 3, an air inlet 31, an air pipe 32, a three-way valve 18, a handle 19, a groove 33, a cover plate 34, a tension spring 35, an ejector rod 36, a conical countersunk head 37 and a rubber boss 38.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 2, the methane sensor of the present invention comprises a housing 1, a handle 11 is disposed on one side of the housing 1, and a processor 12, a laser sensor 13 and an exhaust fan 14 are sequentially disposed in the housing 1; the processor 12 is electrically connected with the laser sensor 13; an air inlet 15 of the exhaust fan 14 is communicated with the detection pipe 2, and a probe 16 of the laser sensor 13 penetrates through and extends into the detection pipe 2; a detachable filter screen 21 is arranged on one side of the probe 16, which is far away from the air inlet 15; the detection tube 2 extends out of the shell 1 and is communicated with the outside atmosphere; the exhaust pipe 17 of the exhaust fan 14 extends out of the shell 1; when the device is used, a user holds the handle 11 to open the power supplies of the exhaust fan 14 and the laser sensor 13, the exhaust fan 14 pumps air in a mine roadway into the detection pipe 2, dust in the air is filtered by the filter screen 21, the air with the dust filtered out flows through the probe 16, so that the laser sensor 13 detects the content of methane in the air, data of the laser sensor 13 is processed by the processor 12 and then is displayed by the display, a maintainer records and stores the data and the position where the data are acquired, and finally the recorded data is compared with the data of the methane fixed-point detector, so that the methane fixed-point detector with problems can be maintained and replaced conveniently; adopt the air extractor to detect methane content after extracting the air in the navigation tunnel, change passive detection into initiative detection, improve laser sensor 13's response speed, adopt filter screen 21 to filter the air dust in the tunnel simultaneously, can reduce the pollution of dust to laser sensor 13's probe 16, improve laser sensor 13's sensitivity and life.

As an embodiment of the invention, one end of the detection pipe 2, which is far away from the air inlet pipe, is communicated with a multi-stage telescopic pipe 3, and one end of the telescopic pipe 3, which is far away from the detection pipe 2, is provided with an air inlet 31; can prolong laser sensor 13's detection distance through adopting multistage flexible pipe 3, can also reduce the equipment volume simultaneously, hold handle 11 when using, throw away flexible pipe 3 strength, increase air intake 31 and laser sensor 13's distance behind the extension of flexible pipe 3, air intake 31 on every flexible pipe 3 all can the air inlet simultaneously, has improved the sampling degree of consistency of air, further increases the degree of accuracy that laser sensor 13 detected methane content in the air.

As an embodiment of the present invention, the diameter of the air inlet 31 increases step by step with the decrease of the diameter of the extension tube 3; after the multi-stage telescopic pipe 3 is extended, the length from the air inlet 31 on the telescopic pipe 3 with the smaller pipe diameter to the probe 16 is longer, so that the air inlet volume of each air inlet 31 is relatively uniform through the gradual increase of the diameter of the air inlet 31 along with the reduction of the pipe diameter of the telescopic pipe 3, the uniformity of air sampling in the detection pipe 2 is further ensured, and the detection precision of the laser sensor 13 is improved.

As an embodiment of the present invention, a vent pipe 32 is arranged in the pipe wall of the telescopic pipe 3, and the vent pipe 32 is arranged in a Z shape; the adjacent telescopic pipes 3 are communicated through a vent pipe 32; the exhaust pipe 17 is provided with a three-way valve 18, the three-way valve 18 is controlled by a handle 19, and the three-way valve 18 is communicated with a vent pipe 32 in the telescopic pipe 3 with the largest diameter; the three-way valve 18 is used for controlling the gas flow direction of the exhaust pipe 17; after the methane sensor is used, the three-way valve 18 is controlled through the handle 19, so that air in the exhaust pipe 17 is filled into the vent pipe 32, and the multi-stage telescopic pipe 3 retracts after the vent pipe 32 is filled with air, so that the volume of the methane sensor is reduced, and the methane sensor is convenient to carry.

As an embodiment of the present invention, a groove 33 is disposed on one side of the air inlet 31 near the outer periphery of the telescopic tube 3, a cover plate 34 is hinged in the groove 33, and the cover plate 34 is used for closing the air inlet 31; a tension spring 35 is arranged in the air inlet 31, one end of the tension spring 35 is fixedly connected with the inner wall of the extension tube 3, and the other end of the tension spring 35 is fixedly connected with the cover plate 34; a top rod 36 is connected in the tube wall of the telescopic tube 3 at one side of the air inlet 31 in a sliding manner, and an inclined surface is arranged at one end of the top rod 36 extending out of the inner wall of the telescopic tube 3; the ejector rod 36 is used for ejecting the cover plate 34; the cover plate 34 is tightened through the tension spring 35 to seal the air inlet 31, so that air leakage of the air inlet 31 during the recovery of the extension tube 3 is prevented, and the recovery efficiency of the extension tube 3 is reduced; when the telescopic pipe 3 is completely extended out, the telescopic pipe 3 with the smaller diameter extrudes the ejector rod 36 on the telescopic pipe 3 with the larger diameter, the ejector rod 36 is ejected outwards under the action of the inclined surface, the cover plate 34 is opened, and then the air inlet hole is opened to carry out normal detection on methane in the roadway.

As an embodiment of the present invention, one end of the air inlet 31 near the cover plate 34 is provided with a conical countersunk head 37; a rubber boss 38 matched with the conical countersunk head 37 is arranged at the position of the cover plate 34 corresponding to the conical countersunk head 37; through the cooperation of the rubber boss 38 and the conical countersunk head 37, the sealing performance of the air inlet 31 is further increased when the tension spring 35 pulls the cover plate 34, so that the retraction rate of the multi-stage telescopic pipe 3 is increased, and the time is saved.

When the device works, a user holds the handle 11 to open the power supplies of the exhaust fan 14 and the laser sensor 13, the exhaust fan 14 pumps air in a mine roadway into the detection pipe 2, dust in the air is filtered by the filter screen 21, the air with the dust filtered out flows through the probe 16, so that the laser sensor 13 detects the content of methane in the air, data of the laser sensor 13 is processed by the processor 12 and then is displayed by the display, a maintainer records and stores the data and the position where the data are acquired, and finally the recorded data is compared with the data of the methane fixed-point detector, so that the methane fixed-point detector with problems can be maintained and replaced conveniently; the methane content is detected after the air in the navigation tunnel is extracted by the air extractor, passive detection is changed into active detection, the response speed of the laser sensor 13 is improved, meanwhile, air dust in the tunnel is filtered by the filter screen 21, the pollution of the dust to the probe 16 of the laser sensor 13 can be reduced, the sensitivity of the laser sensor 13 is improved, and the service life of the laser sensor 13 is prolonged; the detection distance of the laser sensor 13 can be prolonged by adopting the multistage telescopic pipes 3, the size of the equipment can be reduced, when the telescopic pipes are used, the handle 11 is held by hand, the telescopic pipes 3 are thrown out by force, the distance between the air inlet 31 and the laser sensor 13 is increased after the telescopic pipes 3 are extended, and meanwhile, the air inlet 31 on each telescopic pipe 3 can be used for introducing air, so that the sampling uniformity of the air is improved, and the accuracy of the laser sensor 13 for detecting the methane content in the air is further increased; after the multi-stage telescopic pipe 3 is extended, the length from the air inlet 31 on the telescopic pipe 3 with the smaller pipe diameter to the probe 16 is longer, so that the air inlet volume of each air inlet 31 is relatively uniform through the gradual increase of the diameter of the air inlet 31 along with the reduction of the pipe diameter of the telescopic pipe 3, the uniformity of air sampling in the detection pipe 2 is further ensured, and the detection precision of the laser sensor 13 is improved; after the methane sensor is used, the three-way valve 18 is controlled through the handle 19, so that air in the exhaust pipe 17 is filled into the vent pipe 32, and the multi-stage telescopic pipes 3 retract after the vent pipe 32 is filled with air, so that the volume of the methane sensor is reduced, and the methane sensor is convenient to carry; the cover plate 34 is tightened through the tension spring 35 to seal the air inlet 31, so that air leakage of the air inlet 31 during the recovery of the extension tube 3 is prevented, and the recovery efficiency of the extension tube 3 is reduced; when the telescopic pipe 3 is completely extended out, the telescopic pipe 3 with the smaller diameter extrudes the ejector rod 36 on the telescopic pipe 3 with the larger diameter, the ejector rod 36 is ejected outwards under the action of the inclined surface, the cover plate 34 is opened, and then the air inlet hole is opened to carry out normal detection on methane in the roadway; through the cooperation of the rubber boss 38 and the conical countersunk head 37, the sealing performance of the air inlet 31 is further increased when the tension spring 35 pulls the cover plate 34, so that the retraction rate of the multi-stage telescopic pipe 3 is increased, and the time is saved.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to 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 those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.