CN115508517A - Toxic and harmful gas detection device based on composite gas-sensitive material and detection method thereof - Google Patents
Toxic and harmful gas detection device based on composite gas-sensitive material and detection method thereof Download PDFInfo
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- CN115508517A CN115508517A CN202211259855.7A CN202211259855A CN115508517A CN 115508517 A CN115508517 A CN 115508517A CN 202211259855 A CN202211259855 A CN 202211259855A CN 115508517 A CN115508517 A CN 115508517A
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Abstract
The invention discloses a toxic and harmful gas detection device based on a composite gas-sensitive material and a detection method thereof. The detection method comprises the following steps: s1, mounting; s2, lowering; s3, rising again; and S4, replacing. The invention can detect the toxic and harmful gas in the first time aiming at the high-corrosivity extremely-severe working environment and the characteristic that hydrogen sulfide gas is heavier than air, and can realize automatic replacement of the detection head to ensure that the detection precision is always kept at a higher level, thereby greatly reducing the risk that the toxic and harmful gas harms workers in the process of oil exploitation or mining field exploitation.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a toxic and harmful gas detection device based on a composite gas-sensitive material and a detection method thereof.
Background
The gas-sensitive semiconductor is used as a gas sensor for detecting gas components and concentration, and is widely applied to the aspects of detection of various flammable and combustible or harmful gases in factories, workshops and mines, detection of household combustible gas leakage and the like, so that the aims of fire prevention, explosion prevention and poisoning prevention are fulfilled, and the safety of life and property is ensured. And as the core of the sensor, the gas sensitive material determines the detection and use performance of the sensor. The gas sensitive material is very sensitive to some oxidizing gas, reducing gas or organic solvent steam in the environment atmosphere, and the adsorption and desorption of these gases on the surface of the material can cause the obvious change of the electrical property (such as resistivity) of the material, thereby achieving the purpose of alarming. Because of the sensitivity to gas, the semiconductor material is named as a semiconductor gas-sensitive material, and the semiconductor gas-sensitive material can be widely applied to the fields of detection, leakage detection, alarm, monitoring and the like of combustible gas and toxic gas.
The gas sensitive material toxic and harmful gas detector is designed to monitor the concentration of toxic and harmful gas in the ambient air, the measurement range of the gas sensitive material toxic and harmful gas detector is from 0-20/50/100ppm of a standard type to 10000ppm of a high measurement range type, the product adopts a solid metal oxide semiconductor sensing technology, and the sensor consists of two sheets: one is a heating plate, the other is a gas-sensitive plate sensitive to toxic and harmful gases, and the two thin plates are both arranged on a silicon chip in a vacuum coating mode. The heating sheet raises the working temperature of the gas-sensitive sheet to a level capable of reacting on the hydrogen sulfide gas, and the gas-sensitive sheet has metal oxide which can dynamically display the change of the concentration of the hydrogen sulfide gas. The sensitivity may vary from one part per billion to one percent.
The existing toxic and harmful gas detection device based on the gas-sensitive material has various types, can be used for 5-6 years or even more than 10 years under the general environment under most conditions, is firm and durable under the normal environmental condition and has stable work, but when used under the extremely severe environmental condition, the service life is greatly shortened. Especially, in the industries such as mine exploitation and oil exploitation, because poisonous and harmful gases such as hydrogen sulfide are heavier than air and are usually accumulated at the bottom of a well or in a slurry tank, if the poisonous and harmful gases are detected by a detection device positioned above the ground, the concentration of the gases is very high, and therefore the detection device needs to be installed in the well or in the slurry tank, the detection device can be in contact with the poisonous and harmful gases such as highly corrosive hydrogen sulfide or wastewater slurry containing the poisonous and harmful gases for a long time, the corrosion damage of the detection device is further aggravated, and certain measures need to be taken to improve the use durability of the poisonous and harmful gases in an extremely severe environment.
Patent CN211348158U discloses a hydrogen sulfide gas monitoring devices for septic tank, the power distribution box comprises a box body, a controller, the hydrogen sulfide sensor, wireless communication module, cantilever supporting component and mobile terminal, the bottom half is connected with cantilever supporting component, the top at the box is fixed to the hydrogen sulfide sensor, cantilever supporting component is including the cantilever that is on a parallel with the liquid level of septic tank and the guide rail of the liquid level of perpendicular to septic tank, the cantilever passes through the direction that motor drive control box is on a parallel with the liquid level of septic tank and stretches out and draws back the removal, the guide rail passes through slider and slide rail control box and removes in the direction of the liquid level of perpendicular to septic tank, the hydrogen sulfide sensor passes through wireless communication module and is connected with the controller, the controller passes through wireless communication module with mobile terminal and is connected. Can realize long-range real-time supervision, convenient and fast to the box can remove in the septic tank top, with the hydrogen sulfide gas concentration that detects different positions. However, the gas monitoring device also has the risk of corrosion damage when working in a high-corrosivity environment for a long time, and the monitoring precision of toxic and harmful gases is reduced.
Disclosure of Invention
The invention provides a method for solving the problems.
The technical scheme of the invention is as follows:
the toxic and harmful gas detection device based on the composite gas-sensitive material comprises a water storage tank, a control console and a cleaning tank, wherein the control console is positioned on the front side of the water storage tank, the cleaning tank is positioned below the control console, the cleaning tank is a tank body with a hollow interior, an opening is formed in the bottom of the cleaning tank, and a detection assembly capable of moving up and down and a conversion assembly used for replacing a main detection head in the detection assembly are arranged in the cleaning tank;
the detection assembly comprises a detection shell, a gas-sensitive assembly is arranged in the detection shell, the main detection head is installed at the bottom of the detection shell, a plurality of auxiliary detection heads are arranged at the upper part of the detection shell, a lifting rope sequentially penetrating through the top of the cleaning box and the console is arranged at the top of the detection shell, and the lifting rope is connected with a lifting assembly positioned in the console;
the conversion parts include one with detect the rotation section of thick bamboo that the casing set up side by side, be located rotation section of thick bamboo bottom and with the synchronous pivoted rolling disc of a rotation section of thick bamboo, the rotation section of thick bamboo top is equipped with and runs through in proper order wash the roof portion with the pivot of control cabinet, the pivot is cup jointed with the end rotation that is located the telescopic link on the inside drive assembly of control cabinet, drive assembly is located the inside dead slot that is equipped with of control cabinet, and the pivot top is equipped with can the inside gliding rotation motor of dead slot, a rotation section of thick bamboo side symmetry are equipped with and are used for placing a reserve main storage cylinder who detects the head and are used for depositing the main storage cylinder who detects the head that has used.
Furthermore, a display screen for displaying the detection data of the toxic and harmful gases is arranged above the console. The detection data can be conveniently observed through the display screen.
Further, the auxiliary detection heads are two and are respectively located on two sides of the upper portion of the detection shell, the detection shell is internally located, a weighting block is arranged below the gas sensitive assembly, the gas sensitive assembly comprises a hydrogen sulfide sensor, a carbon monoxide sensor and an ammonia gas sensor, the lifting rope is a steel wire rope, and the lifting assembly comprises a roller for winding the lifting rope and a driving motor for driving the roller to rotate. The lifting of the detection assembly can be realized through the roller, the weighting block and the driving motor.
Further, the water storage box bottom is equipped with 3 water pumps side by side, every the water pump bottom all is equipped with the aqueduct, and one of them aqueduct is connected the back lateral wall of wasing the case, and the left and right sides wall of wasing the case is connected respectively to all the other two aqueducts, washs the inside pressure boost shower nozzle that corresponds its rear side inner wall and left and right sides inner wall of incasement portion and is equipped with a disc respectively, 3 pressure boost shower nozzle is connected with 3 aqueducts one-to-one respectively, and the water storage box upper surface is equipped with the filter screen that is used for filtering the rainwater. Can wash the determine module through the water pump, also can utilize the rainwater of collecting simultaneously.
Further, it is equipped with the joint mouth to detect the casing bottom, joint mouth inner wall for circular setting and joint mouth inner wall with the sealed joint of rubber circle of main detection head outer wall, the inside cover of rubber circle of main detection head outer wall is equipped with a plurality of layers of hydrophobic ventilated membrane, and main detection head bottom and top all are equipped with the apron, apron center department is equipped with the through-hole, and main detection head top's the inside hydrophobic ventilated membrane that is equipped with of detection casing, every the inside hydrophobic ventilated membrane that all is equipped with of vice detection head inboard. The arrangement of the rubber ring can enable the card interface to be automatically butted with the main detection head in the descending process of the detection shell.
Furthermore, the two sides of the rotating motor are respectively provided with a sliding block, the two sides of the upper portion of the empty groove correspond to the positions of the sliding blocks and are respectively provided with a sliding groove used for enabling the sliding blocks to slide, the driving assembly comprises a telescopic motor used for driving the telescopic rod to stretch, the telescopic motor is fixedly arranged at the front end of the inner wall of the empty groove, and the top of the cleaning box is provided with a groove used for providing a space for the sliding of the rotating shaft. The sliding of the lifting motor and the driving assembly can be completed through the arrangement of the sliding groove and the empty groove.
Further, the rolling disc upper surface is equidistant to encircle and is equipped with a plurality of standing grooves that are used for placing the main detection head, the standing groove bottom is equipped with the outlet of avoiding ponding. Accumulated water in the cleaning process can be drained in time through the water outlet.
Furthermore, a first servo motor with double output ends is arranged at the top of the placing cylinder, the two output ends of the first servo motor are symmetrically arranged on two sides above the placing cylinder, connecting rods are arranged at the bottoms of the two output ends of the first servo motor, an I-shaped movable assembly is arranged at the bottom of each connecting rod, each movable assembly comprises an upper baffle, a lower baffle and a movable rod positioned between the upper baffle and the lower baffle, the top of each movable rod is rotatably connected with an upper joint arranged in the middle of the bottom surface of the upper baffle, the bottom of each movable rod is rotatably connected with a lower joint arranged in the middle of the top surface of the lower baffle, two side walls of the placing cylinder, which are positioned on the upper side and the lower side of each baffle, are provided with cavities for the movable rods, the upper baffles and the lower baffles to pass through, and the periphery of the top of the main detection head is provided with an arc-shaped chamfer for the upper baffles to slide in;
the storage cylinder top is equipped with second servo motor, and the storage cylinder sets up for bottom opening cavity, and inside second servo motor's output ran through and extend to the storage cylinder behind the storage cylinder top, second servo motor's output bottom was equipped with and is used for hooking the main hook that gets used main detection head, be close to its bottom position department on the main hook and be equipped with the crotch, main hook and crotch homoenergetic pass the outlet. The main detection head can be conveniently replaced by the arrangement of the placing barrel and the storage barrel.
Further, the inside wireless communication module that is equipped with of control cabinet, wireless communication module includes cloud ware, GPRS, loRa transmission module, 433Mhz transmission module and TCP/bridge transmission module.
The method for detecting the toxic and harmful gas by using the toxic and harmful gas detection device based on the composite gas-sensitive material comprises the following steps:
s1, installation: installing a detection device near a well mouth or a tank opening of a return liquid mud tank at the bottom of a well, wherein the detection device needs to detect toxic and harmful gases, stably installing a water storage tank on the ground, and enabling an opening at the bottom of a cleaning tank to correspond to the well mouth or the tank opening;
s2, lowering: starting the lifting assembly to lengthen the lifting rope, so that the detection assembly is lowered to the bottom of the well or the tank, toxic and harmful gas enters the detection shell through the main detection head and the auxiliary detection head, and the gas sensitive assembly is started to detect the toxic and harmful gas in the bottom of the well or the tank;
s3, rising: after a period of detection, the main detection head is contacted with sludge at the bottom of the well or the tank to cause the blockage of the main detection head and the auxiliary detection head, the lifting assembly is started to shorten the lifting rope, the detection assembly is lifted back to the inside of the cleaning tank, and the auxiliary detection head is washed by water in the water storage tank;
s4, replacement: when the main detection head blocks up and seriously needs to be replaced, then open drive assembly and make it drive telescopic link and conversion components and slide backward, open the rotation motor and make it drive pivot and rolling disc rotation, make the rolling disc correspond main detection head below, deposit the main detection head under the change and keep in the main detection head under the change through the storage cylinder again, transfer a new main detection head through placing a section of thick bamboo, install new main detection head in detecting the casing bottom again.
The invention has the beneficial effects that:
(1) The toxic and harmful gas detection device can be suitable for detecting toxic and harmful gas at the well bottom or in a slurry return liquid tank in oil exploitation or mine exploitation aiming at the working environment with high corrosivity and extreme abominability, can detect the type of toxic and harmful gas at the first time aiming at the characteristic that hydrogen sulfide gas is heavier than air, has strong corrosion resistance, can realize automatic replacement of the detection head to ensure that the detection precision is always kept at a higher level, and greatly reduces the risk that the toxic and harmful gas harms workers in the oil exploitation or mine exploitation process.
(2) The poisonous and harmful gas detection device can realize the placement of the standby main detection head by the matching of the conversion component and the placement barrel, can realize the temporary storage of the used main detection head by the matching of the conversion component and the storage barrel, and can clean the auxiliary detection head by the arrangement of the water storage tank and the cleaning tank.
(3) The poisonous and harmful gas detection device can realize common shaft bottom poisonous and harmful gases such as hydrogen sulfide, carbon monoxide and ammonia gas through the gas sensitive assembly, and can realize cloud platform monitoring, mobile phone monitoring and wireless data transmission through the wireless communication module.
Drawings
FIG. 1 is a schematic view of the overall structure of the detecting device of the present invention;
FIG. 2 is a schematic bottom structure of the detecting device of the present invention;
FIG. 3 is a schematic view of the internal structure of the console of the inspection apparatus of the present invention;
FIG. 4 is a schematic view of the internal structure of a cleaning tank of the detecting device of the present invention;
FIG. 5 is a sectional view showing the inner structure of the console and the washing tank of the inspection apparatus of the present invention;
FIG. 6 is a schematic view of the structure of the empty slot and the sliding slot of the detecting device of the present invention;
FIG. 7 is a schematic view of the internal structure of the detection housing of the detection device of the present invention;
FIG. 8 is a schematic view of the structure of the rotary disk, the placing cylinder and the storage cylinder of the detecting device of the present invention;
FIG. 9 is a schematic view of the inner structure of the cartridge for holding the detecting unit according to the present invention;
FIG. 10 is a schematic view of the internal structure of the cartridge of the detecting unit of the present invention.
The device comprises a water storage tank, a water pump, a water guide pipe, a filter screen, a control console, a roller 21, a driving motor 22, a hollow groove 23, a display screen 24, a sliding groove 25, a telescopic rod 26, a telescopic motor 27, a cleaning box 3, a pressurizing spray head 31, a slotted groove 32, a detection shell 4, a main detection head 41, an auxiliary detection head 42, a lifting rope 43, a weighting block 44, a clamping interface 45, a rubber ring 46, a hydrophobic breathable film 47, a cover plate 48, a through hole 49, a gas sensitive component 5, a hydrogen sulfide sensor 51, a carbon monoxide sensor 52, an ammonia gas sensor 53, a rotating disc 6, a rotating cylinder 61, a rotating shaft 62, a rotating motor 63, a sliding block 64, a placement groove 65, a placement cylinder 66, a placement cylinder 7, a first servo motor 71, a connecting rod 72, an upper baffle 73, a lower baffle 74, a movable rod 75, an upper joint 76, a lower joint 77, a cavity 78, a water outlet 81, a storage cylinder 79, a wireless communication module 83, a wireless hook 9 and a wireless communication module.
Detailed Description
Example 1
As shown in fig. 1 and 2, the toxic and harmful gas detection device based on the composite gas sensitive material comprises a water storage tank 1, a console 2 located on the front side of the water storage tank 1, and a cleaning tank 3 located below the console 2, wherein the cleaning tank 3 is a tank body with a hollow interior, an opening is arranged at the bottom of the cleaning tank 3, and a detection assembly capable of moving up and down and a conversion assembly for replacing a main detection head 41 in the detection assembly are arranged in the cleaning tank 3;
as shown in fig. 2 and 3, 3 water pumps 11 are arranged at the bottom of the water storage tank 1 side by side, a water guide pipe 12 is arranged at the bottom of each water pump 11, one water guide pipe 12 is connected with the rear side wall of the cleaning tank 3, the other two water guide pipes 12 are respectively connected with the left side wall and the right side wall of the cleaning tank 3, a disc-shaped pressurizing nozzle 31 is arranged in the cleaning tank 3 corresponding to the inner wall of the rear side and the inner wall of the left side and the right side wall of the cleaning tank 3, the 3 pressurizing nozzles 31 are respectively connected with the 3 water guide pipes 12 in a one-to-one correspondence manner, a filter screen 13 for filtering rainwater is arranged on the upper surface of the water storage tank 1, a display screen 24 for displaying toxic and harmful gas detection data is arranged above the console 2, a wireless communication module 9 is arranged in the console 2, and the wireless communication module 9 comprises a cloud server, a GPRS, a LoRa transmission module, a 433Mhz transmission module and a TCP/bridge transmission module;
as shown in fig. 4, 5, and 7, the detection assembly includes a detection housing 4, a gas sensitive assembly 5 is disposed inside the detection housing 4, a main detection head 41 is installed at the bottom of the detection housing 4, a plurality of auxiliary detection heads 42 are disposed on the upper portion of the detection housing 4, a lifting rope 43 sequentially penetrating the top of the cleaning tank 3 and the console 2 is disposed on the top of the detection housing 4, the lifting rope 43 is connected with a lifting assembly located inside the console 2, the two auxiliary detection heads 42 are respectively located on both sides of the upper portion of the detection housing 4, a weight 44 is disposed below the gas sensitive assembly 5 inside the detection housing 4, the gas sensitive assembly 5 includes a hydrogen sulfide sensor 51, a carbon monoxide sensor 52 and an ammonia sensor 53, the lifting rope 43 is a steel wire rope, the lifting assembly includes a drum 21 for winding the lifting rope 43 and a driving motor 22 for driving the drum 21 to rotate, a clamp port 45 is disposed at the bottom of the detection housing 4, an inner wall of the clamp port 45 is circularly disposed, an inner wall of the clamp port 45 is hermetically clamped with a rubber ring 46 on the outer wall of the main detection head 41, a plurality of layers of gas permeable films 47 are disposed inside the rubber ring 46, a central through hole 47 disposed at the detection head 4, a central portion of the detection housing 4 is disposed at the bottom of the detection head 48, and a permeable film 47 disposed at the central portion of the detection head 4;
as shown in fig. 5, 6, and 8, the conversion assembly includes a rotary drum 61 arranged side by side with the detection housing 4, a rotary disc 6 located at the bottom of the rotary drum 61 and rotating synchronously with the rotary drum 61, a rotary shaft 62 sequentially penetrating through the top of the cleaning box 3 and the console 2 is arranged at the top of the rotary drum 61, the rotary shaft 62 is rotatably sleeved with the end of a telescopic rod 26 on a driving assembly located inside the console 2, the driving assembly is located in a hollow slot 23 arranged inside the console 2, a rotary motor 63 capable of sliding inside the hollow slot 23 is arranged at the top of the rotary shaft 62, a placing drum 7 for placing a spare main detection head 41 and a storage drum 8 for storing a used main detection head 41 are symmetrically arranged at one side of the rotary drum 61, a sliding block 64 is arranged at each of two sides of the rotary motor 63, a sliding slot 25 for sliding the sliding block 64 is arranged at each of two sides of the upper portion of the hollow slot 23 corresponding to the position of the sliding block 64, the driving assembly includes a telescopic motor 27 for driving the telescopic rod 26 to stretch, the telescopic motor 27 is fixedly arranged at the front end of the inner wall of the hollow slot 23, a slot 32 for providing a space for the sliding of the rotary shaft 62, a slot 32 is arranged at the top of the cleaning box 3, a drainage port 65 for placing head 65 arranged around the surface of the rotary disc 6, and a drainage port 65 for avoiding the placement of the main detection head 41, and the placement slot 65 for placing slot 65;
as shown in fig. 8 and 9, a first servo motor 71 with two output ends is arranged at the top of the placing cylinder 7, two output ends of the first servo motor 71 are symmetrically arranged at two sides above the placing cylinder 7, a connecting rod 72 is arranged at the bottom of each of the two output ends of the first servo motor 71, an i-shaped movable assembly is arranged at the bottom of the connecting rod 72, the movable assembly comprises an upper baffle 73, a lower baffle 74 and a movable rod 75 positioned between the upper baffle 73 and the lower baffle 74, the top of the movable rod 75 is rotatably connected with an upper joint 76 arranged in the middle of the bottom surface of the upper baffle 73, the bottom of the movable rod 75 is rotatably connected with a lower joint 77 arranged in the middle of the top surface of the lower baffle 74, two side walls of the placing cylinder 7 corresponding to the center of the movable rod 75 are provided with convex stoppers 78, two side walls of the placing cylinder 7 positioned at the upper and lower sides of the stoppers 78 are provided with cavities 79 for the movable rod 75, the upper baffle 73 and the lower baffle 74 to pass through, and the periphery of the top of the main detection head 41 is provided with an arc-shaped chamfer for the upper baffle 73 to slide in;
as shown in fig. 8 and 10, a second servo motor 81 is disposed on the top of the storage cylinder 8, the storage cylinder 8 is hollow with an opening at the bottom, an output end of the second servo motor 81 penetrates through the top of the storage cylinder 8 and then extends into the storage cylinder 8, a main hook 82 for hooking the used main detection head 41 is disposed at the bottom of the output end of the second servo motor 81, a hook 83 is disposed on the main hook 82 near the bottom thereof, and both the main hook 82 and the hook 83 can pass through the water outlet 66.
The motor, the wireless communication module 9, the display screen 24, the hydrogen sulfide sensor 51, the carbon monoxide sensor 52 and the ammonia sensor 53 according to the present embodiment are all commercially available products.
Example 2
The embodiment provides a method for detecting toxic and harmful gas based on a toxic and harmful gas detection device with a composite gas-sensitive material on the basis of embodiment 1, which comprises the following steps:
s1, installation: installing a detection device near a well mouth or a tank mouth of a return liquid mud tank at the bottom of a well, wherein the detection device needs to detect toxic and harmful gases, stably installing a water storage tank 1 on the ground, and enabling an opening at the bottom of a cleaning tank 3 to correspond to the well mouth or the tank mouth;
s2, lowering: starting the lifting assembly to lengthen the lifting rope 43, so that the detection assembly is lowered to the bottom of the well or the tank, toxic and harmful gas enters the detection shell 4 through the main detection head 41 and the auxiliary detection head 42, and the gas-sensitive assembly 5 is started to detect the toxic and harmful gas in the bottom of the well or the tank;
s3, rising: after a period of detection, the main detection head 41 is contacted with sludge at the bottom of the well or the tank to cause the blockage of the main detection head 41 and the auxiliary detection head 42, the lifting assembly is started to shorten the lifting rope 43, the detection assembly is lifted back to the inside of the cleaning tank 3, and the auxiliary detection head 42 is washed by water in the water storage tank 1;
s4, replacement: when the main detection head 41 is blocked and needs to be replaced seriously, the driving assembly is started to drive the telescopic rod 26 and the conversion assembly to slide backwards, the rotating motor 63 is started to drive the rotating shaft 62 and the rotating disc 6 to rotate, the rotating disc 6 corresponds to the lower part of the main detection head 41, the replaced main detection head 41 is stored and temporarily stored in the storage cylinder 8, the new main detection head 41 is placed through the storage cylinder 7, and the new main detection head 41 is installed at the bottom of the detection shell 4.
Example 3
The present embodiment is different from embodiment 1 in that: the upper surface of the rotary disk 6 is provided with 10 placing grooves 65 for placing the main detection head 41 at equal intervals.
Example 4
The present embodiment is different from embodiment 1 in that: the upper surface of the rotary disk 6 is provided with 6 placing grooves 65 for placing the main detection head 41 at equal intervals.
The working principle is as follows: the operation principle of the detection method and the detection device of the present invention will be further described with reference to the detection method of the toxic and harmful gas detection device in embodiment 2.
In the lifting or lifting process, the driving motor 22 is started to drive the roller 21 to rotate, so that the lifting rope 43 is lifted;
in the process of flushing, the water pump 11 is started to spray water in the water storage tank 1 out through the water guide pipe 12 and the pressurizing nozzle 31;
during the replacement process, the telescopic motor 27 is started to push the telescopic rod 26 to slide, so as to drive the rotating shaft 62 to slide in the empty slot 23, the sliding block 64 slides in the sliding slot 25, when the lower part of the main detection head 41 corresponds to the rotary disc 6, the rotary motor 63 is started to enable the empty placement slot 65 to correspond to the main detection head 41, the driving motor 22 is started to enable the lower part of the detection assembly until the main detection head 41 is contacted with the placement slot 65, the rotary motor 63 is started to slightly rotate the rotary disc 6 in a reciprocating manner to enable the main detection head 41 to fall off and fall into the placement slot 65, the detection assembly is lifted, the rotary disc 6 is rotated to the lower part of the storage barrel 8, the second servo motor 81 is started to enable the main hook 82 to penetrate through the hydrophobic film 47 in the main detection head 41 and the through hole 49 of the cover plate 48, and finally the main hook 82 is lifted after penetrating through the water outlet 66, so that the hook 83 hooks the main detection head 41 to lift up, and the main detection head 41 is temporarily stored in the storage barrel 8;
then, an empty placing groove 65 is arranged below the placing cylinder 7 correspondingly, a plurality of standby main detection heads 41 are placed in the placing cylinder 7 from top to bottom, the first servo motor 71 is started to enable the connecting rod 72 to slide inwards, the movable rod 75 is inclined under the action of the stop 78, the two upper baffles 73 slide towards the inner side of the cavity 79, the two lower baffles 74 slide towards the outer side of the cavity, the lower baffle 74 no longer blocks the main detection head 41 located at the lowest part, the main detection head 41 located at the lowest part falls into the placing groove 65, then the first servo motor 71 is started to enable the connecting rod 72 to slide outwards, the movable rod 75 is inclined under the action of the stop 78, the two upper baffles 73 slide towards the outer side of the cavity 79, the two lower baffles 74 slide towards the inner side of the cavity, the upper baffle 73 no longer blocks the main detection head 41 located at the lowest part at the moment, the main detection head 41 falls onto the lower baffles 74, and then the connecting rod 72 and the movable rod 75 are reset;
then, the rotating motor 63 is started to enable the placing groove 65, on the rotating disc 6, where the main detection head 41 is newly placed, to correspond to the lower portion of the card interface 45, the driving motor 22 is started to enable the card interface 45 to be in butt joint with the main detection head 41, the outer wall rubber ring 46 of the main detection head 41 is in butt joint with the card interface 45, replacement and installation of the main detection head 41 are completed, and the detection steps from the step S1 to the step S4 are continuously and repeatedly performed.
Claims (10)
1. The toxic and harmful gas detection device based on the composite gas-sensitive material is characterized by comprising a water storage tank (1), a control console (2) positioned on the front side of the water storage tank (1), and a cleaning tank (3) positioned below the control console (2), wherein the cleaning tank (3) is a tank body with a hollow interior, an opening is formed in the bottom of the cleaning tank (3), and a detection assembly capable of moving up and down and a conversion assembly for replacing a main detection head (41) in the detection assembly are arranged in the cleaning tank (3);
the detection assembly comprises a detection shell (4), a gas-sensitive assembly (5) is arranged in the detection shell (4), the main detection head (41) is installed at the bottom of the detection shell (4), a plurality of auxiliary detection heads (42) are arranged on the upper portion of the detection shell (4), a lifting rope (43) which sequentially penetrates through the top of the cleaning box (3) and the console (2) is arranged on the top of the detection shell (4), and the lifting rope (43) is connected with a lifting assembly located in the console (2);
conversion parts include one with detect a rotation section of thick bamboo (61) that casing (4) set up side by side, be located rotation section of thick bamboo (61) bottom and with rotation section of thick bamboo (61) synchronous pivoted rolling disc (6), rotation section of thick bamboo (61) top is equipped with and runs through in proper order wash case (3) top with pivot (62) of control cabinet (2), pivot (62) rotate with the end that is located telescopic link (26) on the drive assembly of control cabinet (2) inside and cup joint, drive assembly is located inside dead slot (23) that are equipped with of control cabinet (2), and pivot (62) top is equipped with can dead slot (23) inside gliding rotation motor (63), and rotation section of thick bamboo (61) one side symmetry is equipped with and is used for placing a section of thick bamboo (7) of placing reserve main detection head (41) and is used for depositing storage cylinder (8) of main detection head (41).
2. The gas-sensitive material-based toxic and harmful gas detection apparatus according to claim 1, wherein a display screen (24) for displaying the detection data of toxic and harmful gas is arranged above the console (2).
3. The composite gas-sensitive material-based poisonous and harmful gas detection device as claimed in claim 1, wherein the number of the secondary detection heads (42) is two and the two secondary detection heads are respectively located at two sides of the upper portion of the detection shell (4), a weight (44) is located inside the detection shell (4) and below the gas-sensitive component (5), the gas-sensitive component (5) comprises a hydrogen sulfide sensor (51), a carbon monoxide sensor (52) and an ammonia sensor (53), the lifting rope (43) is a steel wire rope, and the lifting component comprises a drum (21) for winding the lifting rope (43) and a driving motor (22) for driving the drum (21) to rotate.
4. The composite gas-sensitive material-based toxic and harmful gas detection device according to claim 1, wherein 3 water pumps (11) are arranged at the bottom of the water storage tank (1) side by side, each water pump (11) is provided with a water conduit (12) at the bottom, one water conduit (12) is connected with the rear side wall of the cleaning tank (3), the other two water conduits (12) are respectively connected with the left and right side walls of the cleaning tank (3), a disc-shaped pressurizing nozzle (31) is respectively arranged on the inner wall of the rear side and the inner wall of the left and right sides of the cleaning tank (3) corresponding to the inside of the cleaning tank (3), 3 pressurizing nozzles (31) are respectively connected with the 3 water conduits (12) in a one-to-one correspondence manner, and a filter screen (13) for filtering rainwater is arranged on the upper surface of the water storage tank (1).
5. The composite gas-sensitive material-based toxic and harmful gas detection device according to claim 1, wherein a joint interface (45) is arranged at the bottom of the detection housing (4), the inner wall of the joint interface (45) is in a circular shape, the inner wall of the joint interface (45) is in sealing joint with the rubber ring (46) on the outer wall of the main detection head (41), a plurality of layers of hydrophobic gas-permeable membranes (47) are sleeved inside the rubber ring (46) on the outer wall of the main detection head (41), a cover plate (48) is arranged at the bottom and the top of the main detection head (41), a through hole (49) is arranged at the center of the cover plate (48), the hydrophobic gas-permeable membranes (47) are arranged inside the detection housing (4) above the main detection head (41), and each hydrophobic gas-permeable membrane (47) is arranged inside the detection housing (4) on the inner side of the auxiliary detection head (42).
6. The composite gas-sensitive material-based toxic and harmful gas detection device according to claim 1, wherein two sides of the rotating motor (63) are respectively provided with a sliding block (64), two sides of the upper portion of the empty groove (23) are respectively provided with a sliding groove (25) for enabling the sliding block (64) to slide corresponding to the position of the sliding block (64), the driving assembly comprises a telescopic motor (27) for driving the telescopic rod (26) to stretch, the telescopic motor (27) is fixedly arranged at the front end of the inner wall of the empty groove (23), and the top of the cleaning box (3) is provided with a slot (32) for providing a space for the sliding of the rotating shaft (62).
7. The composite gas-sensitive material-based toxic and harmful gas detection device according to claim 1, wherein a plurality of placement grooves (65) for placing the main detection head (41) are formed around the upper surface of the rotating disc (6) at equal intervals, and a water drainage port (66) for avoiding water accumulation is formed in the bottom of each placement groove (65).
8. The composite gas-sensitive material-based toxic and harmful gas detection device according to claim 7, wherein a first servo motor (71) with two output ends is arranged at the top of the placement cylinder (7), the two output ends of the first servo motor (71) are symmetrically arranged at two sides above the placement cylinder (7), connecting rods (72) are arranged at the bottoms of the two output ends of the first servo motor (71), an i-shaped movable assembly is arranged at the bottom of each connecting rod (72), the movable assembly comprises an upper baffle (73), a lower baffle (74) and a movable rod (75) positioned between the upper baffle (73) and the lower baffle (74), the top of the movable rod (75) is rotatably connected with an upper joint (76) arranged in the middle of the bottom surface of the upper baffle (73), the bottom of the movable rod (75) is rotatably connected with a lower joint (77) arranged in the middle of the top surface of the lower baffle (74), protruding stoppers (78) are arranged at positions of two side walls of the placement cylinder (7) corresponding to two side walls of the movable rod (75), the upper and the lower baffle (7) is provided with a main baffle (73) for enabling the upper baffle (73) to pass through a chamfer (73), and a main baffle (73) is arranged at the periphery of the upper baffle (79);
storage cylinder (8) top is equipped with second servo motor (81), and storage cylinder (8) are bottom opening cavity setting, and the output of second servo motor (81) runs through inside storage cylinder (8) top is extended to storage cylinder (8), and the output bottom of second servo motor (81) is equipped with main hook (82) that are used for hooking main detection head (41) that have used, be close to its bottom position department on main hook (82) and be equipped with crotch (83), main hook (82) and crotch (83) homoenergetic are passed outlet (66).
9. The composite gas-sensitive material-based toxic and harmful gas detection device according to claim 1, wherein a wireless communication module (9) is arranged inside the console (2), and the wireless communication module (9) comprises a cloud server, a GPRS (general packet radio service), a LoRa (Lora) transmission module, a 433Mhz transmission module and a TCP/network bridge transmission module.
10. The method for detecting poisonous and harmful gas by using the poisonous and harmful gas detection device based on the composite gas-sensitive material as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:
s1, installation: installing a detection device near a well mouth or a tank opening of a bottom return liquid mud tank, which needs to be subjected to toxic and harmful gas detection, stably installing a water storage tank (1) on the ground, and enabling an opening at the bottom of a cleaning tank (3) to correspond to the well mouth or the tank opening;
s2, lowering: starting a lifting assembly to lengthen a lifting rope (43), so that a detection assembly is lowered to the bottom of a well or a tank, toxic and harmful gas enters the detection shell (4) through a main detection head (41) and an auxiliary detection head (42), and the toxic and harmful gas in the bottom of the well or the tank is detected by starting a gas sensitive assembly (5);
s3, rising again: when the main detection head (41) is in contact with sludge at the bottom of a well or the tank to cause the blockage of the main detection head (41) and the auxiliary detection head (42) after a period of detection, the lifting assembly is started to shorten the lifting rope (43), the detection assembly is lifted back to the inside of the cleaning tank (3), and the auxiliary detection head (42) is washed by water in the water storage tank (1);
s4, replacement: when main detection head (41) blockked up seriously and need to be changed, then open drive assembly and make it drive telescopic link (26) and conversion components and slide backward, open rotation motor (63) and make it drive pivot (62) and rolling disc (6) and rotate, make rolling disc (6) correspond main detection head (41) below, deposit main detection head (41) rethread storage cylinder (8) under the change and temporarily store main detection head (41), transfer a new main detection head (41) through placing a section of thick bamboo (7), install new main detection head (41) in detecting casing (4) bottom again.
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