CN216847096U

CN216847096U - Four-channel constant-flow atmospheric sampler

Info

Publication number: CN216847096U
Application number: CN202123333094.9U
Authority: CN
Inventors: 陈卫军
Original assignee: Wuxi Deersi Indoor Environmental Testing Management Co ltd
Current assignee: Wuxi Deersi Indoor Environmental Testing Management Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-06-28
Anticipated expiration: 2031-12-28

Abstract

The utility model discloses a four-channel constant-current atmospheric sampler, which adopts a four-channel design, has flexible sampling mode, can collect two to four gases or parallel samples, and can be respectively and independently controlled; by using the design of the efficient suck-back prevention dryer, suck-back of absorption liquid caused by misoperation is effectively prevented, and the safety of the instrument is enhanced; the high-quality filter element is adopted, so that solid particles are prevented from entering the gas path to interfere sampling, and the sampling pump and the gas path are protected; the flow is automatically and accurately controlled through the electronic flowmeter, so that the flow is free of fluctuation, the pressure and the temperature are measured by real-time monitoring, the flow deviation is automatically compensated, and the flow accuracy is further optimized.

Description

Four-channel constant-flow atmospheric sampler

Technical Field

The utility model relates to a gas sampling field, especially a four-channel constant current atmospheric sampling ware.

Background

The gas sampling is commonly found in a plurality of fields, in the routine and emergency monitoring of gaseous substances and aerosol carried out by departments such as environmental protection, sanitation, labor, safety supervision, military, scientific research, education and the like, the gas to be sampled often contains various harmful gases, the common gas sampler on the market is adopted, in order to enable the collected sample to be more representative, a sampler needs to pay greater labor intensity, the sampling is carried out for a plurality of times in a longer time, in order to reduce the labor intensity of the sampler, the four-channel constant-flow atmosphere sampler is greatly improved in the aspects of small size, portability, flow stability and the like.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides a four-channel constant current atmosphere sample thief, it is small-size portable, the stable performance, convenient operation, gaseous collection flow is stable, intensity of labour that has significantly reduced.

The technical scheme is as follows: in order to realize the above object, the utility model discloses a four-channel constant current atmospheric sampling ware, including four gas circuits, per the gas circuit is all including the absorption bottle, the absorption bottle is through the interface one on the preceding gas circuit connecting pipe connection desicator, the air pump that the interface two-pass on the desicator was connected on the host computer in back gas circuit connecting pipe connects, air pump connects through built-in trachea connection in the aspiration pump, aspiration pump fixed mounting in the host computer, be provided with liquid crystal display on the quick-witted case qianmen of host computer.

Further, the absorption bottle is a special-shaped glass bent pipe; the whole absorption bottle is in a U-shaped pipe shape, the end ports of the side pipes on the two sides of the absorption bottle respectively extend horizontally outwards to form an air inlet and an air outlet, the side pipe connected with the air inlet is an air inlet pipe, the side pipe connected with the air outlet is an air-liquid mixing pipe, and the air inlet pipe is connected with the bottom end of the air-liquid mixing pipe through a transition bent pipe; the air inlet, the air inlet pipe, the transition bent pipe, the gas-liquid mixing pipe and the air outlet are communicated in sequence to form an absorption air path, and the air outlet is connected to the front air path connecting pipe.

Furthermore, the air inlet is sleeved with a dust filtering device, the dust filtering device comprises a core pipe, the opening end of the core pipe is inserted into the air inlet, the closed end of the core pipe is fixed with a spherical filtering structure through threads, a plurality of air holes are uniformly distributed on the outer wall of the spherical filtering structure, filter cotton is filled in the spherical inner cavity of the spherical filtering structure, and a plurality of through holes for air to pass through are uniformly distributed on the partial end face and the side wall of the closed end extending into the spherical inner cavity.

Furthermore, the outer side of the pipe wall of the core pipe protrudes outwards to form an annular pressing block, a rubber pad is padded between the annular pressing block and the end face of the air inlet, and part of the rubber pad extends to be padded between the outer wall of the core pipe and the inner wall of the air inlet; the annular pressing block and the threaded port of the spherical filtering structure are padded with a rubber pad sleeve, and the rubber pad sleeve is arranged on the outer wall of the air inlet and on the annular pressing block.

Furthermore, the absorption bottle is placed in an absorption bottle groove, and the absorption bottle groove is formed in the upper end face of the case of the host machine; the dryer is placed on a dryer support, and the dryer support is fixedly installed on the outer wall of the case of the host.

Furthermore, preceding gas circuit connecting pipe and back gas circuit connecting pipe all adopt the rubber tube, preceding gas circuit connecting pipe and back gas circuit connecting pipe pass through the colour differentiation mark.

Further, a sample is extracted by the air pump, gas is filtered by the dust filter to obtain solid particles, and absorption liquid in the absorption bottle reacts with the gas to obtain test liquid for testing and analyzing to obtain gas detection data; the gas flows through the dryer and then enters the built-in pipe, the gas flows through the electronic flowmeter, the flow signal is sent to the microprocessor for processing, the instantaneous flow is obtained, the sampling volume is accumulated, and meanwhile, the standard condition sampling volume is converted according to the collected pre-metering temperature and the pre-metering pressure and is displayed on the liquid crystal display screen.

Has the advantages that: the four-channel constant-current atmospheric sampler adopts a four-channel design, has flexible sampling mode, can collect two to four gases or parallel samples, and can be respectively and independently controlled; by using the design of the efficient suck-back prevention dryer, suck-back of absorption liquid caused by misoperation is effectively prevented, and the safety of the instrument is enhanced; the high-quality filter element is adopted, so that solid particles are prevented from entering the gas path to interfere sampling, and the sampling pump and the gas path are protected; the flow is automatically and accurately controlled through the electronic flowmeter, so that the flow is free of fluctuation, the pressure and the temperature are monitored in real time, the flow deviation is automatically compensated, and the flow accuracy is further optimized; automatically calculating the accumulated sampling volume, and simultaneously converting the standard sampling volume according to the air pressure and the temperature; the high-performance ultra-low sound inlet diaphragm pump is used, so that the stability is greatly improved, the service life is long, and the noise is ultra-low; the Chinese liquid crystal display screen capable of automatically adjusting the contrast is suitable for sampling in cold and low-pressure areas and popular software display interfaces, and good human-computer interaction is realized; in the sampling process, the power supply state of the system is automatically monitored, when the alternating current is disconnected or the voltage of the built-in lithium battery is low, the current sampling state is automatically memorized, and the previous sampling is automatically recovered when the incoming call comes.

Drawings

FIG. 1 is a structural diagram of a four-channel constant-flow atmospheric sampler;

FIG. 2 is a schematic view of a gas circuit connection at the dryer;

FIG. 3 is a view showing the structure of an absorption bottle;

FIG. 4 is a sectional view of the dust filter;

fig. 5 is an external structural view of the dust filter.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The four-channel constant-current atmosphere sampler as shown in the attached figures 1-5 comprises four gas channels, wherein each gas channel comprises an absorption bottle 1, the absorption bottle 1 is connected with a first interface 4 on a dryer 3 through a front gas channel connecting pipe 2, a second interface 5 on the dryer 3 is connected with an air pump connector 8 on a host 7 through a rear gas channel connecting pipe 6, the air pump connector 8 is connected with an air pump through a built-in gas pipe, the air pump is fixedly arranged in the host 7, and a liquid crystal display screen 9 is arranged on a front door 7-2 of a case of the host 7;

the dryers are arranged in the gas path, so that the absorption liquid is effectively prevented from being sucked backwards due to misoperation, the safety of the instrument is enhanced, before sampling, allochroic silica gel with sufficient drying capacity is filled in each dryer, the drying capacity of the drying agent is convenient to pay attention to, and when the drying agent 2/3 changes color, the drying agent is updated timely; the whole structure is simple, small and exquisite, light and convenient to carry, and can adapt to various environments for use.

The absorption bottle 1 is a special-shaped glass bent pipe; the whole absorption bottle 1 is in a U-shaped tubular shape, the end ports of the side pipes on the two sides of the absorption bottle 1 respectively extend horizontally outwards to form an air inlet 10 and an air outlet 11, the side pipe connected with the air inlet 10 is an air inlet pipe 12, the side pipe connected with the air outlet 11 is an air-liquid mixing pipe 13, and the air inlet pipe 12 is connected with the bottom end of the air-liquid mixing pipe 13 through a transition bent pipe 14; the air inlet 10, the air inlet pipe 12, the transition bent pipe 14, the gas-liquid mixing pipe 13 and the air outlet 11 are communicated in sequence to form an absorption air path, and the air outlet 11 is connected to the front air path connecting pipe 2; the outer wall of the air inlet pipe 12 is connected with the outer wall of the gas-liquid mixing pipe 13 through a glass short shaft 24

The gas-liquid mixing pipe 13 is divided into two sections along the axial direction, one section close to the transition bent pipe 14 is a straight pipe with the pipe diameter slightly larger than that of the gas inlet pipe 12, and the other section is a special pipe with a spherical outline inner cavity;

before the sampling, with the absorption bottle vertical placement, the bottled quantitative absorption liquid that packs into, the intake pipe is equal high with the intraductal liquid level of gas-liquid mixture, when the air-bleed pump during operation, the air of the intraductal liquid level top of extraction gas-liquid mixture, under atmospheric pressure, make the absorption liquid in the intake pipe flow into in the gas-liquid mixture through the transition return bend, when all absorption liquids all get into gas-liquid mixture pipe one side, because the intraductal pipe diameter of gas-liquid mixture crescent, liquid rising speed slows down, the outside gas that is located the liquid below passes the absorption liquid and rises, and then in getting into preceding gas circuit connecting pipe, at this in-process, the gaseous and absorption liquid intensive mixing reaction that awaits measuring, obtain the mixed test solution, accessible experimental analysis obtains gaseous detection data.

A dust filtering device 15 is sleeved on the air inlet 10, the dust filtering device 15 comprises a core pipe 16, the open end 16-1 of the core pipe 16 is inserted into the air inlet 10, the closed end 16-2 of the core pipe 16 is fixed with a spherical filtering structure 17 through threads, a plurality of air holes 18 are uniformly distributed on the outer wall of the spherical filtering structure 17, filtering cotton is filled in the spherical inner cavity 17-1 of the spherical filtering structure 17, and a plurality of through holes for air to pass through are uniformly distributed on the partial end surface and the side wall of the closed end 16-2 extending into the spherical inner cavity 17-1;

the collection area is increased through the spherical filtering structure, gas can be sucked from multiple directions, the influence of one-way sampling on the representativeness of a sample is avoided, the gas is sucked through the air holes, passes through the filter cotton, blocks solid particles carried in the lower gas, enters the inner cavity of the core pipe through the through hole with the closed end of the filtered gas, and then enters the air inlet through the inner cavity of the core pipe, the part of the core pipe inserted into the inner cavity of the spherical filtering structure adopts the form of the closed opening, the filter cotton is prevented from being sucked into the absorption bottle, so that the solid particles are brought into the absorption bottle, and the air path is protected; the closed end and the spherical filtering structure are fixed by threads, so that the filter cotton can be conveniently replaced, the old filter cotton is taken out, the spherical inner cavity is filled with the new filter cotton, the closed end is screwed by threads, and the closed end extends into the part of the spherical inner cavity, so that the filter cotton around the outside of the closed end is compressed, the gap between the filter cotton is smaller, the step-type filtering from coarse to fine is realized from outside to inside, smaller solid particles are filtered, and the gas circuit and the host are better protected.

The outer side of the tube wall of the core tube 16 protrudes outwards to form an annular pressing block 19, a rubber gasket plug 20 is arranged between the annular pressing block 19 and the end face of the air inlet 10 in a cushioning mode, and part of the rubber gasket plug 20 extends to be lined between the outer wall of the core tube 16 and the inner wall of the air inlet 10; a rubber cushion cover 21 is arranged between the annular pressing block 19 and the threaded port of the spherical filtering structure 17 in a cushioning mode, and the rubber cushion cover 21 is sleeved on the outer walls of the annular pressing block 19 and the air inlet 10;

through rubber pad stopper and rubber pad cover, guaranteed the gas tightness of filter equipment with the absorption bottle junction, avoid gas leakage, perhaps have the interference gas to get into, influence the result, simultaneously, one inside one increases frictional force outward for filter equipment is connected more firmly with the absorption bottle, has improved the security of device.

The absorption bottle 1 is placed in an absorption bottle groove 22, and the absorption bottle groove 22 is formed in the upper end face of the case of the host 7; the dryer 3 is placed on a dryer support 23, and the dryer support 23 is fixedly installed on the outer wall of the case of the host 7; the whole structure is more compact and ordered, and the upper end face of the case of the host 7 is also provided with a carrying handle 7-1, so that the portable multifunctional portable computer is convenient to carry.

The front gas circuit connecting pipe 2 and the rear gas circuit connecting pipe 6 are both made of rubber pipes, and the front gas circuit connecting pipe 2 and the rear gas circuit connecting pipe 6 are marked by color distinction; rubber tube frictional force is big, establish alright with more firm with the glass device cooperation through the cover, and be convenient for dismantle the equipment fast, and then portable.

The specific working principle is as follows:

the air pump is used for pumping a sample, gas is filtered by the dust filter 15 to obtain solid particles, and absorption liquid in the absorption bottle 1 reacts with the gas to obtain test liquid for testing and analyzing to obtain gas detection data; the gas flows through the dryer and then enters the built-in pipe, the gas flows through the electronic flowmeter, the flow signal is sent to the microprocessor to be processed, the instantaneous flow is obtained, the sampling volume is accumulated, meanwhile, the sampling volume is converted into the standard condition sampling volume according to the collected pre-metering temperature and the pre-metering pressure and is displayed on the liquid crystal display screen 9, and the concentration of the gas can be calculated according to the collected harmful gas content and the standard condition volume in the later period.

The above is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A four-channel constant-flow atmospheric sampler is characterized in that: the air dryer comprises four air paths, wherein each air path comprises an absorption bottle (1), the absorption bottle (1) is connected with a first connector (4) on the dryer (3) through a front air path connecting pipe (2), a second connector (5) on the dryer (3) is connected with an air pump connector (8) on the host (7) through a rear air path connecting pipe (6), the air pump connector (8) is connected with an air pump through a built-in air pipe, the air pump is fixedly installed in the host (7), and a liquid crystal display (9) is arranged on a front cabinet door (7-2) of the host (7);

the absorption bottle (1) is a special-shaped glass bent pipe; the absorption bottle (1) is integrally in a U-shaped tubular shape, ports of side pipes on two sides of the absorption bottle (1) extend horizontally outwards to form an air inlet (10) and an air outlet (11), the side pipe connected with the air inlet (10) is an air inlet pipe (12), the side pipe connected with the air outlet (11) is an air-liquid mixing pipe (13), and the air inlet pipe (12) is connected with the bottom end of the air-liquid mixing pipe (13) through a transition bent pipe (14); the gas inlet (10), the gas inlet pipe (12), the transition bent pipe (14), the gas-liquid mixing pipe (13) and the gas outlet (11) are communicated in sequence to form an absorption gas path, and the gas outlet (11) is connected to the front gas path connecting pipe (2).

2. The four-channel constant-flow atmosphere sampler according to claim 1, characterized in that: the dust filtering device is characterized in that a dust filtering device (15) is sleeved on the air inlet (10), the dust filtering device (15) comprises a core pipe (16), the open end (16-1) of the core pipe (16) is inserted into the air inlet (10), the closed end (16-2) of the core pipe (16) is fixed with a spherical filtering structure (17) through threads, a plurality of air holes (18) are uniformly distributed on the outer wall of the spherical filtering structure (17), filter cotton is filled in the spherical inner cavity (17-1) of the spherical filtering structure (17), and a plurality of through holes for air to pass through are uniformly distributed on the partial end face and the side wall of the spherical inner cavity (17-1) of the closed end (16-2).

3. The four-channel constant-flow atmosphere sampler according to claim 2, characterized in that: the outer side of the pipe wall of the core pipe (16) protrudes outwards to form an annular pressing block (19), a rubber pad plug (20) is padded between the annular pressing block (19) and the end face of the air inlet (10), and part of the rubber pad plug (20) extends to be padded between the outer wall of the core pipe (16) and the inner wall of the air inlet (10); annular briquetting (19) with fill up between the screw thread port of spherical filtration (17) and establish rubber pad cover (21), rubber pad cover (21) cover is located annular briquetting (19) and on air inlet (10) outer wall.

4. The four-channel constant-flow atmosphere sampler according to claim 3, characterized in that: the absorption bottle (1) is placed in an absorption bottle groove (22), and the absorption bottle groove (22) is formed in the upper end face of the case of the host (7); the dryer (3) is placed on a dryer support (23), and the dryer support (23) is fixedly installed on the outer wall of the case of the host (7).

5. The four-channel constant-flow atmosphere sampler according to claim 1, characterized in that: preceding gas circuit connecting pipe (2) and back gas circuit connecting pipe (6) all adopt the rubber tube, preceding gas circuit connecting pipe (2) and back gas circuit connecting pipe (6) are through the color differentiation mark.