CN110694193A - Device for detecting benzene protection time of toxin filtering box - Google Patents
Device for detecting benzene protection time of toxin filtering box Download PDFInfo
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- CN110694193A CN110694193A CN201911017462.3A CN201911017462A CN110694193A CN 110694193 A CN110694193 A CN 110694193A CN 201911017462 A CN201911017462 A CN 201911017462A CN 110694193 A CN110694193 A CN 110694193A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B27/00—Methods or devices for testing respiratory or breathing apparatus for high altitudes
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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
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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Abstract
The invention discloses a device for detecting benzene protection time of a canister, which comprises a base, and a benzene vapor buffer tank, an air buffer tank, a mixing tank, a first canister and a second canister which are arranged on the base, wherein the first canister and the second canister are completely consistent and are arranged on the surface of the base side by side, the first canister and the second canister are respectively connected with a benzene vapor alarm instrument and a benzene vapor purification device, and the benzene vapor alarm instrument is used for detecting the benzene vapor protection time in the first canister and the second canister. The test data is directly read by an instrument and is more accurate.
Description
Technical Field
The invention belongs to the technical field of safety protection, and particularly relates to a device for detecting benzene protection time of a toxin filtering box.
Background
With the rapid development and deepening of the national industrialization degree, the requirement on the labor safety protection of some special industries is increased day by day. In the process of production operation activities, various enterprises can encounter various leakages of flammable and explosive gases, toxic gases, high-temperature smoke and the like, and even can directly carry out production operation in the special environment, thereby directly threatening the life and property safety of enterprise personnel.
A common respirator consists of a face mask and a canister (or filter element). The mask comprises a mask body, an eye window, a communicator, a breathing valve, a head band (or a helmet) and the like. The filtering canister is used for purifying toxic gas, and is filled with filtering layer and adsorbent, or the filtering plate is made by mixing these 2 materials, and is assembled into filtering element. The lighter (about 200 g) canister or filter element can be directly connected to the face mask, the heavier canister is connected with the face mask through an air duct, and the protection time of the filter type gas mask filter piece, namely the filter element, is measured according to the requirements of the national standard GB2890-2009 respiratory protection self-priming filter type gas mask.
For example, patent application No. (CN201821484418.4) discloses a gas mask filter protection time detection system, which uses seven channels of media connected in parallel to share a set of pipeline gas distribution system, and samples and measures the concentration of a test medium at the upstream end of a sample test cover, and samples and measures the concentration of a penetrating medium at the downstream end of the sample test cover; the device is used for solving the problem that the filter piece type of various toxic media cannot be completely tested in the market at present, but the operation of the device for detecting the protection time of the filter chamber is complex in the detection process by a chemical method, and meanwhile, the device for detecting the benzene protection time of the existing filter cartridge has the following defects in the experimental process:
1. the conventional toxicity filtering box usually adopts a chemical analysis method for testing the protection time of benzene vapor, is controlled by an instrument, is complicated in operation through manual calculation, and needs to consume a certain amount of chemical reagents, so that the consumption of the chemical reagents is caused;
2. the conventional device for testing the protection time of the poison filtering box can only carry out single detection on the protection time of benzene vapor, cannot carry out comparative detection on the protection time of the benzene vapor with different concentrations, and needs to detect again when the protection time of the benzene vapor with different concentrations needs to be compared, thus wasting time and labor;
3. the canister in the existing canister protection time testing device is generally provided with the canister cover, the canister cover realizes the detection of the protection time of benzene vapor through the effect of the canister cover, and the canister can not effectively filter the benzene vapor only as a protection time detecting device in the using process, so that the canister has great limitation.
Disclosure of Invention
The invention aims to provide a device for detecting benzene protection time of a toxin filtering box, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a canister benzene protection time detection device, includes base and benzene vapor buffer tank, air buffer tank, blending tank, first canister and the second canister of setting on the base, first canister and second canister be identical and set up side by side on the surface of base, be connected with benzene vapor alarm appearance and benzene vapor clarification plant on first canister and the second canister respectively.
As a further scheme of the invention: the outlet end of benzene vapor buffer tank is connected with the blending tank through a pipeline, and a first pressure sensor, a first gas pressure reducer and a first low-pressure control valve are sequentially arranged on the pipeline connected with the benzene vapor buffer tank and the blending tank, the outlet end of the air buffer tank is connected with the blending tank through a pipeline, a second pressure sensor, a second gas pressure reducer and a second low-pressure control valve are sequentially arranged on the pipeline connected with the air buffer tank and the blending tank, the outlet end of the blending tank is connected with a three-way joint, one interface of the three-way joint is connected with the first canister through a pipeline, the other interface of the three-way joint is connected with the second canister through a pipeline, a first temperature sensor, a flow meter and a first one-way valve are sequentially connected on the pipeline between the outlet end of the blending tank and the three-way joint, and a first one-way valve is sequentially arranged on the pipeline between the three-way joint and the first canister, Third pressure sensor, second temperature sensor also have set gradually first check valve, third pressure sensor, second temperature sensor on being located the pipeline between three way connection and the second canister, be provided with the alarm instrument control valve on the pipeline that first canister and benzene vapour alarm instrument are connected, also be provided with the alarm instrument control valve on the pipeline that second canister and benzene vapour alarm instrument are connected, be provided with the evacuation stop valve on the pipeline that first canister and benzene vapour clarification plant are connected, also be provided with the evacuation stop valve on the pipeline that second canister and benzene vapour clarification plant are connected.
As a still further scheme of the invention: the base is square structure, and vertically is provided with a plurality of vertical supports in one side on base surface, vertical support is provided with four, and four vertical support is square structure setting on the surface of base, and is four the inboard level that the support formed square structure is provided with the baffle, with four through the baffle vertical support separates into two intervals, and places check out test set respectively in two intervals.
As a still further scheme of the invention: four corners of the bottom surface of the base are respectively provided with a foot cup pad, and the bottom surface of the foot cup pad is provided with a colloid shock absorption gasket.
As a still further scheme of the invention: first canister comprises jar body and cover, a plurality of screw hole has been seted up to first-class angle on the top surface circumference of jar body, and has also seted up the screw hole of a plurality of and jar body top surface screw hole looks adaptation in cover circumference border department, jar body and cover pass through locking screw fixed connection, the top surface central point of cover puts the fixed gas outlet that is provided with, and the gas outlet passes through pipe connection benzene vapour alarm instrument, the fixed canister that is provided with on the bottom surface of cover.
As a still further scheme of the invention: and an annular sealing rubber strip is arranged on the contact surface of the tank cover and the tank body.
As a still further scheme of the invention: the internal portion of jar is fixed and is provided with annular supporting shoe, the cross section of the vertical direction of annular supporting shoe is the wedge structure, and annular supporting shoe is located jar body middle upper position at the internal portion of jar, and erects through annular supporting shoe in the inside of jar body and purifies the subassembly, the gas vent has been seted up just to be located to purify the subassembly top on the lateral wall of the jar body, the internal thread has been seted up to the gas vent inside, and passes through threaded connection benzene steam purification equipment input pipeline on the gas vent.
As a still further scheme of the invention: purify the subassembly and include sponge smoke filtering layer, dry layer, charcoal catalyst layer and flooding charcoal layer, sponge smoke filtering layer, dry layer, charcoal catalyst layer and flooding charcoal layer are by supreme stack setting down at the internal jar, and be provided with a plurality of connector link on the surface of flooding charcoal layer, the connector link is provided with two, and two the connector link is symmetrical about flooding charcoal layer central line.
As a still further scheme of the invention: the sponge smoke filtering layer is of a conical structure, and the purifying assembly is erected on the wedge-shaped surface of the annular supporting block through the conical structure of the sponge smoke filtering layer.
As a still further scheme of the invention: introducing benzene vapor into a benzene vapor buffer tank, reducing the pressure of the benzene vapor in a pipeline to low pressure through a first pressure sensor and a first gas pressure reducer, controlling the gas flow to the flow required by an experiment through a first low-pressure control valve, introducing the benzene vapor into a mixing tank, introducing air into an air buffer tank, reducing the pressure of the air in the pipeline to low pressure through a second pressure sensor and a second gas pressure reducer, controlling the gas flow to the flow required by the experiment through a second low-pressure control valve, introducing the benzene vapor into the mixing tank, fully mixing the benzene vapor and the air in the mixing tank, opening a first one-way valve, introducing the benzene vapor mixed gas of the mixing tank into a first canister or a second canister respectively, testing the temperature and the flow of the benzene vapor mixed gas through a first temperature sensor and a flow meter, opening a second one-way valve when the benzene vapor mixed gas is introduced into the first canister, compensating the pressure and the temperature through a third pressure sensor and a second temperature sensor, and correcting the flow data, introducing the benzene vapor mixed gas into the first canister, allowing the benzene vapor mixed gas filtered by the first canister to enter the benzene vapor alarm instrument through the alarm instrument control valve, and when the benzene vapor alarm instrument gives an alarm, namely a canister in the first canister fails, so that the protection time of the canister is obtained.
Compared with the prior art, the invention has the beneficial effects that:
1. the benzene vapor protection time test adopts instrument control, so that benzene vapor mixed gas is led into the canister, and leaks to the benzene vapor alarm instrument through the canister in the canister, the benzene protection time of the canister is detected, the use of chemical reagents in the detection process can be effectively reduced, the operation is simpler and more convenient, and test data is read directly through the instrument and is more accurate;
2. the benzene vapor mixed gas in the mixing tank can be simultaneously guided into the first canister and the second canister by arranging the first canister and the second canister, and also can be respectively guided into the first canister and the second canister, when the benzene vapor mixed gas is simultaneously guided into the first canister and the second canister, the concentration of the benzene vapor mixed gas is adjusted by the third pressure sensor and the second temperature sensor on the connecting pipelines of the first canister and the second canister, so that experimental tests under different conditions are carried out, the operation is simple and feasible, different canisters can be continuously tested, and the testing efficiency is improved;
3. through setting up dismantled and assembled purification subassembly in first canister and second canister inside, can carry out effective toxin filtering operation to vapor mist gaseous mixture through first canister and second canister, dust and moisture that contain in the detached gas through sponge smoke filter layer and dry layer, avoid treating that the inside moisture that contains of toxin filtering gas leads to the jam of toxin filtering structure, guarantee the normal clear of toxin filtering process, and through the good absorption of flooding charcoal, catalytic performance, realize the high-efficient comprehensive antitoxic of canister, toxic gases such as the absorption vapor that can be fine, protect the health, make canister can carry out the guard time test promptly and can be to harmful gas's purification simultaneously, strong practicality has.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a perspective view of a benzene protection time detection device of a toxicity filtering box.
FIG. 2 is a schematic view of the canister structure of the benzene-protecting time detecting device of the canister.
Fig. 3 is a schematic structural diagram of a canister cover in a device for detecting benzene protection time of a poison filtering cartridge.
Fig. 4 is a half sectional view of a tank body in the benzene protection time detection device of the toxicity filtering box.
Fig. 5 is a schematic structural diagram of a purification assembly in a device for detecting benzene protection time of a toxin filtering box.
Fig. 6 is a block flow diagram of a device for detecting benzene protection time of a toxin filter box.
In the figure: a base 1, a foot cup pad 101, a vertical support 102, a clapboard 103, a benzene vapor buffer tank 2, a first pressure sensor 201, a first gas pressure reducer 202, a first low-pressure control valve 203, an air buffer tank 3, a second pressure sensor 301, a second gas pressure reducer 302, a second low-pressure control valve 303, a mixing tank 4, a first temperature sensor 401, a flowmeter 402, a first one-way valve 403, a first canister 5, a second one-way valve 501, a third pressure sensor 502 and a second temperature sensor 503, the device comprises a tank body 504, an annular supporting block 5041, an exhaust port 5042, a tank cover 505, an air outlet 5051, a locking screw 506, a toxin filtering box 5061, a threaded hole 507, a second toxin filtering box 6, a benzene vapor alarm instrument 7, an alarm instrument control valve 701, a benzene vapor purification device 8, an exhaust device 801, a purification component 9, a sponge smoke filtering layer 901, a drying layer 902, a carbon catalyst layer 903, an impregnated carbon layer 904 and a connecting buckle 905.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, in an embodiment of the present invention, a device for detecting benzene protection time of a canister includes a base 1, and a benzene vapor buffer tank 2, an air buffer tank 3, a mixing tank 4, a first canister 5 and a second canister 6 that are disposed on the base 1, where the first canister 5 and the second canister 6 are completely identical and are disposed side by side on a surface of the base 1, the first canister 5 and the second canister 6 are respectively connected to a benzene vapor alarm 7 and a benzene vapor purification device 8, the benzene vapor alarm 7 is used to detect benzene vapor protection time in the first canister 5 and the second canister 6, and the benzene vapor purification device 8 is used to purify a benzene vapor mixed gas after detection of the protection time is completed.
The exit end of benzene steam buffer tank 2 passes through the pipeline and is connected with blending tank 4, and has set gradually first pressure sensor 201, first gas pressure reducer 202 and first low pressure control valve 203 on the pipeline that benzene steam buffer tank 2 and blending tank 4 are connected, reduces to the low pressure through first pressure sensor 201 and first gas pressure reducer 202 to the interior benzene steam of pipeline to through first low pressure control valve 203 control gas flow to the required flow of experiment.
The exit end of air buffer tank 3 passes through the pipeline and is connected with blending tank 4, and has set gradually second pressure sensor 301, the gaseous pressure reducer 302 of second and second low pressure control valve 303 on the pipeline that air buffer tank 3 and blending tank 4 are connected, reduces the pipeline interior air to the low pressure through second pressure sensor 301 and the gaseous pressure reducer 302 of second to through the required flow of second low pressure control valve 303 control gas flow to experiment.
The exit end pipe connection of blending tank 4 has three way connection, three way connection one of them interface passes through the first canister 5 of pipe connection, and another interface of three way connection passes through the pipe connection second canister 6, makes the benzene vapour mist in the blending tank 4 can leading-in first canister 5 and second canister 6 simultaneously through three way connection, also can lead-in first canister 5 and second canister 6 respectively, improves this guard time detection device's practicality.
A first temperature sensor 401, a flow meter 402 and a first one-way valve 403 are sequentially connected to a pipeline between the outlet end of the mixing tank 4 and the three-way joint, and the temperature and the flow of the steam-benzene mixed gas are tested through the first temperature sensor 401 and the flow meter 402.
A first check valve 501, a third pressure sensor 502 and a second temperature sensor 503 are sequentially arranged on a pipeline between the three-way joint and the first canister 5, a first check valve 501, a third pressure sensor 502 and a second temperature sensor 503 are also sequentially arranged on a pipeline between the three-way joint and the second canister 6, and pressure and temperature are compensated through the third pressure sensor 502 and the second temperature sensor 503 to correct flow data.
An alarm instrument control valve 701 is arranged on a pipeline connected with the first canister 5 and the benzene vapor alarm instrument 7, an alarm instrument control valve 701 is also arranged on a pipeline connected with the second canister 6 and the benzene vapor alarm instrument 7, an emptying stop valve 801 is arranged on a pipeline connected with the first canister 5 and the benzene vapor purification equipment 8, and an emptying stop valve 801 is also arranged on a pipeline connected with the second canister 6 and the benzene vapor purification equipment 8.
Base 1 is square structure, and is provided with a plurality of vertical supports 102 at the vertical one side on base 1 surface, vertical support 102 is provided with four, and four vertical support 102 is square structure setting on base 1's surface, and is four the inboard level that support 102 formed square structure is provided with baffle 103, with four through baffle 103 vertical support 102 separates into two intervals, and places check out test set respectively in two intervals, makes the check out test set among the guard time detection device place more conveniently.
Four edges of the bottom surface of the base 1 are respectively provided with a foot cup pad 101, and the bottom surface of the foot cup pad 101 is provided with a colloid shock absorption gasket, so that the erection of the base 1 is more stable.
The first canister 5 is composed of a canister body 504 and a canister cover 505, a plurality of threaded holes 507 are formed in the circumference of the top surface of the canister body 504 at equal angles, a plurality of threaded holes 507 matched with the threaded holes 507 in the top surface of the canister body 504 are also formed in the circumferential edge of the canister cover 505, and the canister body 504 and the canister cover 505 are fixedly connected through locking screws 506, so that the canister body 504 and the canister cover 505 can be quickly disassembled and assembled.
The fixed gas outlet 505 that is provided with in top surface central point of cover 505, and gas outlet 505 passes through pipe connection benzene vapor alarm 7, the fixed poison filtering box 5061 that is provided with on the bottom surface of cover 505 realizes the detection to benzene vapor mist in the poison filtering box through poison filtering box 5061.
An annular sealing rubber strip is arranged on the contact surface of the tank cover 505 and the tank body 504, so that the sealing performance of the tank cover 505 and the tank body 504 is improved.
The inside of jar body 504 is fixed and is provided with annular supporting block 5041, the vertical direction's of annular supporting block 5041 cross section is wedge structure, and annular supporting block 5041 is located jar body middle upper position in jar body 504, and erects purification subassembly 9 through annular supporting block 5041 in the inside of jar body 504, is convenient for the installation of purification subassembly 9 in the canister through annular supporting block 5041.
Gas vent 5042 has been seted up on the lateral wall of jar body 504 and being located the purification subassembly 9 top, the internal thread has been seted up to gas vent 5042 is inside, and has 8 connecting tubes of benzene vapor purification equipment through threaded connection on gas vent 5042.
The purification component 9 comprises a sponge smoke filtering layer 901, a drying layer 902, a carbon catalyst layer 903 and an impregnated carbon layer 904, the sponge smoke filtering layer 901, the drying layer 902, the carbon catalyst layer 903 and the impregnated carbon layer 904 are arranged in the tank body 504 from bottom to top in an overlapped mode, dust and moisture contained in gas are removed through the sponge smoke filtering layer 901 and the drying layer 902, the blockage of a virus filtering structure caused by the moisture contained in the gas to be filtered is avoided, the normal operation of the virus filtering process is ensured, and the high-efficiency comprehensive virus prevention of the virus filtering tank is realized through the good adsorption and catalysis performance of the impregnated carbon layer 904.
And be provided with a plurality of connector link 905 on impregnated carbon layer 904's surface, connector link 905 is provided with two, and two the connector link 905 is symmetrical about impregnated carbon layer 904 central line, is convenient for purify the installation of subassembly 9 in jar body 504.
The sponge smoke filtering layer 901 is of a conical structure, and the purifying component 9 is erected on the wedge-shaped surface of the annular supporting block 5041 through the conical structure of the sponge smoke filtering layer 901.
The working principle of the detection device is as follows: introducing benzene vapor into a benzene vapor buffer tank 2, reducing the pressure of the benzene vapor in a pipeline to a low pressure through a first pressure sensor 201 and a first gas pressure reducer 202, controlling the gas flow to a flow required by an experiment through a first low-pressure control valve 203, introducing the benzene vapor into a mixing tank 4, simultaneously introducing air into an air buffer tank 3, reducing the pressure of the air in the pipeline to a low pressure through a second pressure sensor 301 and a second gas pressure reducer 302, controlling the gas flow to a flow required by the experiment through a second low-pressure control valve 303, introducing the benzene vapor into the mixing tank 4, fully mixing the benzene vapor with the air in the mixing tank 4, opening a first one-way valve 501, introducing the benzene vapor mixed gas of the mixing tank 4 into a first canister 5 or a second canister 6 respectively, testing the temperature and the flow of the benzene vapor mixed gas through a first temperature sensor 401 and a flow meter 402, when introducing the benzene vapor mixed gas into the first canister 5, and opening a second one-way valve 501, compensating pressure and temperature through a third pressure sensor 502 and a second temperature sensor 503, correcting flow data, introducing the benzene vapor mixed gas into the first canister 5, introducing the benzene vapor mixed gas filtered by the first canister 5 into a benzene vapor alarm 7 through an alarm control valve 701, and when the benzene vapor alarm 8 gives an alarm, namely a toxin filtering box 5061 in the first canister 5 fails, obtaining the protection time of the canister.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a poison filtering box benzene protection time detection device which characterized in that: the device comprises a base (1), and a benzene vapor buffer tank (2), an air buffer tank (3), a mixing tank (4), a first canister (5) and a second canister (6) which are arranged on the base (1), wherein the first canister (5) and the second canister (6) are completely consistent and are arranged on the surface of the base (1) side by side, and the first canister (5) and the second canister (6) are respectively connected with a benzene vapor alarm instrument (7) and a benzene vapor purification device (8);
the exit end of benzene vapor buffer tank (2) passes through the pipeline and is connected with blending tank (4), and has set gradually first pressure sensor (201), first gas pressure reducer (202) and first low pressure control valve (203) on the pipeline that benzene vapor buffer tank (2) and blending tank (4) are connected, the exit end of air buffer tank (3) passes through the pipeline and is connected with blending tank (4), and has set gradually second pressure sensor (301), second gas pressure reducer (302) and second low pressure control valve (303) on the pipeline that air buffer tank (3) and blending tank (4) are connected, the exit end pipe connection of blending tank (4) has three way connection, one of them interface of three way connection passes through pipe connection first canister (5), and another interface of three way connection passes through pipe connection second canister (6), and is located to be connected gradually first temperature on the pipeline between blending tank (4) exit end and the three way connection and passes through The device comprises a sensor (401), a flowmeter (402) and a first one-way valve (403), wherein a first one-way valve (501), a third pressure sensor (502) and a second temperature sensor (503) are sequentially arranged on a pipeline between a three-way joint and a first canister (5), a first one-way valve (501), a third pressure sensor (502) and a second temperature sensor (503) are sequentially arranged on a pipeline between the three-way joint and a second canister (6), an alarm instrument control valve (701) is arranged on a pipeline between the first canister (5) and a benzene vapor alarm instrument (7), an alarm instrument control valve (701) is also arranged on a pipeline between the second canister (6) and the benzene vapor alarm instrument (7), an emptying stop valve (801) is arranged on a pipeline between the first canister (5) and the benzene vapor purification equipment (8), and an emptying stop valve is also arranged on a pipeline between the second canister (6) and the benzene vapor purification equipment (8) A stop valve (801).
2. The device for detecting the benzene protection time of the toxin filtering box according to claim 1, wherein the base (1) is of a square structure, a plurality of vertical supports (102) are vertically arranged on one side of the surface of the base (1), four vertical supports (102) are arranged, and four vertical supports (102) are arranged on the surface of the base (1) in a square structure, a partition plate (103) is horizontally arranged on the inner side of the square structure formed by the four vertical supports (102), the four vertical supports (102) are divided into two intervals through the partition plate (103), and detection equipment is respectively arranged in the two intervals.
3. The device for detecting benzene protection time of a poison filtering box according to claim 1, wherein foot cup pads (101) are respectively arranged at four corners of the bottom surface of the base (1), and rubber shock absorption gaskets are arranged on the bottom surfaces of the foot cup pads (101).
4. The device for detecting the benzene protection time of the canister cap according to claim 1, wherein the first canister (5) is composed of a canister body (504) and a canister cap (505), a plurality of threaded holes (507) are formed in the circumference of the top surface of the canister body (504) at equal angles, a plurality of threaded holes (507) matched with the threaded holes (507) in the top surface of the canister cap (504) are also formed in the circumferential edge of the canister cap (505), the canister body (504) and the canister cap (505) are fixedly connected through locking screws (506), an air outlet (505) is fixedly arranged in the center of the top surface of the canister cap (505), the air outlet (505) is connected with the benzene vapor alarm (7) through a pipeline, and a canister cap (5061) is fixedly arranged on the bottom surface of the canister cap (505).
5. The device for detecting the benzene protection time of the poison filtering box according to claim 4, wherein an annular sealing rubber strip is arranged on the contact surface of the tank cover (505) and the tank body (504).
6. The device for detecting the benzene protection time of the toxicity filtering box according to claim 4, wherein an annular supporting block (5041) is fixedly arranged inside the tank body (504), the cross section of the annular supporting block (5041) in the vertical direction is of a wedge-shaped structure, the annular supporting block (5041) is located in the tank body (504) and is located at the upper position of the middle of the tank body, the purifying assembly (9) is erected inside the tank body (504) through the annular supporting block (5041), an exhaust port (5042) is formed in the side wall of the tank body (504) and located above the purifying assembly (9), an internal thread is formed in the exhaust port (5042), and the exhaust port (5042) is connected with an air inlet pipeline of the benzene vapor purifying equipment (8) through a thread.
7. The device for detecting the benzene protection time of the toxicity filtering box according to claim 6, wherein the purification component (9) comprises a sponge smoke filtering layer (901), a drying layer (902), a carbon catalyst layer (903) and an impregnated carbon layer (904), the sponge smoke filtering layer (901), the drying layer (902), the carbon catalyst layer (903) and the impregnated carbon layer (904) are stacked from bottom to top in the tank body (504), a plurality of connecting buckles (905) are arranged on the surface of the impregnated carbon layer (904), two connecting buckles (905) are arranged, and the two connecting buckles (905) are symmetrical about the center line of the impregnated carbon layer (904).
8. The device for detecting the benzene protection time of the toxicity filtering box according to claim 7, wherein the sponge smoke filtering layer (901) is of a conical structure, and the purifying component (9) is erected on the wedge-shaped surface of the annular supporting block (5041) through the conical structure of the sponge smoke filtering layer (901).
9. The apparatus for detecting benzene protection time of a toxicant-filtering box according to claim 1, wherein the detecting step of the apparatus is as follows:
introducing benzene vapor into a benzene vapor buffer tank (2), reducing the pressure of the benzene vapor to a low pressure in a pipeline through a first pressure sensor (201) and a first gas pressure reducer (202), controlling the gas flow to the flow required by an experiment through a first low-pressure control valve (203), introducing into a mixing tank (4), simultaneously introducing air into an air buffer tank (3), reducing the pressure of the air in the pipeline to a low pressure through a second pressure sensor (301) and a second gas pressure reducer (302), controlling the gas flow to the flow required by the experiment through a second low-pressure control valve (303), introducing into the mixing tank (4), fully mixing the benzene vapor with the air in the mixing tank (4), opening a first one-way valve (501), introducing the benzene vapor mixed gas of the mixing tank (4) into a first canister (5) or a second canister (6) respectively, and testing the temperature and the flow of the benzene vapor mixed gas through a first temperature sensor (401) and a flow meter (402), when the benzene vapor mixed gas is led into the first canister (5), the second one-way valve (501) is opened, the pressure and the temperature are compensated through the third pressure sensor (502) and the second temperature sensor (503), flow data are corrected, then the benzene vapor mixed gas is led into the first canister (5), the benzene vapor mixed gas filtered by the first canister (5) enters the benzene vapor alarm (7) through the alarm control valve (701), and when the benzene vapor alarm (8) gives an alarm, namely the poison filtering box (5061) in the first canister (5) is invalid, the protection time of the canister is obtained.
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| CN111426620A (en) * | 2020-04-23 | 2020-07-17 | 湖北华强科技有限责任公司 | Canister protection time detection device |
| CN113237682A (en) * | 2021-04-30 | 2021-08-10 | 湖北华强科技股份有限公司 | Detection device for simulating carbon layer protection time of canister and use method |
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