CN212513855U

CN212513855U - Sampling device for enriching abamectin B2a in air

Info

Publication number: CN212513855U
Application number: CN202021402358.4U
Authority: CN
Inventors: 何健; 李菊颖; 孔德洋; 许静; 豆叶枝; 孔祥吉; 王赵青
Original assignee: Nanjing Institute of Environmental Sciences MEE
Current assignee: Nanjing Institute of Environmental Sciences MEE
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-02-09
Anticipated expiration: 2030-07-16

Abstract

The utility model discloses a sampling device for enriching abamectin B2a in air, including supporting component, sampling subassembly and air inlet assembly, sampling subassembly includes sampling box and abamectin B2a collection section of thick bamboo, sampling box establishes on supporting component, there is the protection casing on the sampling box, the inside chamber and the inlet channel of placing that are equipped with of sampling box, abamectin B2a collection section of thick bamboo is established in placing the chamber, the joint has the collection diaphragm in the abamectin B2a collection section of thick bamboo, air inlet assembly includes centrifugal fan and admission line, centrifugal fan establishes on supporting component, the last air inlet that is provided with of centrifugal fan, gas outlet and transmission rocker of air inlet line, an end expert and the inlet channel of admission line are connected, the other end is connected with the air inlet; the utility model has the advantages of reasonable design, the operation of being convenient for, abamectin B2a sampling efficiency is high, suitable a large amount of popularization.

Description

Sampling device for enriching abamectin B2a in air

Technical Field

The utility model relates to an air sampling equipment technical field, concretely relates to a sampling device for avermectin B2a in enrichment air.

Background

The avermectin B2 is a nerve toxin and has a unique action mechanism: gamma-aminobutyric acid system acting on insect neuronal synapses or neuromuscular synapses, stimulates nerve endings to emit GABA, a neurotransmitter inhibitor, and C1, which promotes GABA gating^-Extended open channel, large amount of C1^-The surging causes the electrical potential of the nerve membrane to be super-increased, so that the nerve membrane is in a suppression state, thereby blocking the nerve impulse conduction and leading the insects to be paralyzed, refused and killed. The abamectin B2 comprises two components B2a and B2B, and B2a occupies an absolute large amount, so that the overall toxicity of B2 is moderate and lower than that of B1, and the abamectin B2 is safer and more environment-friendly to use. Avermectin B2a (Avermectin B2a) chemical name: (13R,23S) -dihydro-5-O-dimethyl-23-hydroxy abamectin, molecular formula C48H74O15, relative molecular mass 890, light yellow to white crystal powder in appearance, and no odor. The melting point is 155-160 ℃, the vapor pressure is 2 multiplied by 10 < -7 > Pa, and the relative density is 1.16(21 ℃). Slightly soluble in water; the solubility is very high in organic solvents such as toluene, methanol, ethanol, DMF, acetone and the like at the temperature of more than 15 ℃. The melting point is 155-160 ℃. The stability is good in an aqueous solution (25 ℃) with the pH value of 5.5-7.0; sensitive to strong acid and strong base; under intense light irradiation, the structure is first transformed, yellowing, and then degraded.

The method is used for collecting the abamectin B2a in the air environment, is the key for researching the environmental behavior characteristics of the abamectin B2a, and can provide a basis for monitoring the abamectin B2a in the environment.

SUMMERY OF THE UTILITY MODEL

To the technical problem that above-mentioned exists, the utility model provides an easy operation, collection efficiency are high is arranged in gathering air avermectin B2 a's sampling device.

The technical scheme of the utility model is that: a sampling device for enriching abamectin B2a in air comprises a supporting assembly, a sampling assembly and an air inlet assembly; the supporting assembly comprises a base and a telescopic supporting rod, and the telescopic supporting rod is vertically arranged on the base; the sampling assembly comprises a sampling box and an abamectin B2a collecting cylinder, the sampling box is rotatably clamped at the top end of a telescopic supporting rod, a protective cover is connected to one end, far away from the telescopic supporting rod, of the sampling box through threads, 4-8 placing cavities are uniformly arranged in the sampling box, an air inlet channel is arranged at the position, corresponding to the placing cavities, of one end, close to the telescopic supporting rod, of the sampling box, the number of the abamectin B2a collecting cylinders is consistent with that of the placing cavities, the abamectin B2a collecting cylinder is formed by buckling two semicircular plates and is movably clamped in the placing cavities, and 2-4 collecting diaphragms are movably clamped between the two semicircular plates; the air inlet assembly comprises a centrifugal fan and an air inlet pipeline, the centrifugal fan is fixedly arranged on the telescopic supporting rod, an air inlet and an air outlet are formed in the centrifugal fan, a transmission rocker is connected to the centrifugal fan through gear engagement, the air inlet pipeline is fixedly arranged on the telescopic supporting rod, the upper end of the air inlet pipeline is movably connected with an air inlet channel through a pipe joint, and the lower end of the air inlet pipeline is connected with the air inlet through a connecting hose.

Further, be provided with in the semicircle board and keep off ring and clamp ring that correspond with collection diaphragm quantity, each clamp ring slides the joint with the inner wall of semicircle board respectively, it has the threaded rod to rotate the joint on the semicircle board, the threaded rod respectively with each clamp ring threaded connection, during the use, place the collection diaphragm between keeping off ring and clamp ring, with two semicircle board locks, through rotatory threaded rod, make each clamp ring be close to corresponding fender ring, it is fixed to compress tightly the collection diaphragm, this design can improve the fixed effect of collecting the diaphragm on the one hand, on the other hand also is convenient for dismantle the collection diaphragm, thereby be convenient for monitor and analyze abamectin benzoate B2 a.

Furthermore, an elastic protective net is arranged on the baffle ring, and the collecting diaphragm is protected by the elastic protective net, so that the collecting diaphragm is prevented from being broken due to overlarge air pressure, and the reliability of the device is improved.

Furthermore, the movable sleeve of the pipe joint is arranged at the end part of the air inlet pipeline, a compression spring is arranged at the joint, one end of the compression spring is abutted to the pipe joint, the other end of the compression spring is abutted to the inner wall of the air inlet pipeline, and the compression spring is arranged at the joint of the pipe joint and the air inlet pipeline, so that the sampling box is convenient to rotate and the pipe joint is connected with an air inlet channel.

Further, sampling box one end is provided with the ring pipe, the ring pipe switches on with each inlet channel, be provided with the air guide mouth that corresponds with inlet channel quantity on the ring pipe, be provided with first manual gate valve between two adjacent air guide mouths, all be provided with the manual gate valve of second on each air guide mouth, the air guide mouth can be connected with the coupling, through setting up the ring pipe, first manual gate valve and the manual gate valve of second, can enough utilize the different abamectin B2a samples of gathering different places of collection diaphragm, also can utilize whole abamectin B2a samples of gathering in the air of collection diaphragm in same place.

The utility model discloses a theory of operation does: when the device is used, the device is moved to a sampling place, the collecting diaphragm is placed between the baffle rings and the compression rings of the semicircular arc plates, the two semicircular arc plates are buckled, each compression ring is close to the corresponding baffle ring by rotating the threaded rod, the collecting diaphragm is compressed and fixed, and the abamectin B2a collecting cylinder is placed in the placing cavity of the sampling box; and then adjusting the height of the telescopic support rod to a proper position, if the abamectin B2a samples are collected at different places, closing all first manual gate valves on the annular pipe, opening second manual gate valves on corresponding air guide nozzles, replacing and connecting pipe joints with the air guide nozzles, driving a centrifugal fan to rotate by using a transmission rocker, introducing air into all abamectin B2a collecting cylinders, discharging the air from an air outlet, collecting and intercepting the abamectin B2a in the air by a collecting diaphragm, if the abamectin B2a samples are required to be collected at the same place, opening all the first manual gate valves, reserving one second manual gate valve to be in an open state, closing all the rest parts, repeating the operation, and after the collection is finished, carrying out laboratory inspection and analysis on the abamectin B2a samples intercepted on the collecting diaphragm.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages of reasonable design, the operation of being convenient for, through setting up the sampling box that can rotate on telescopic support, set up a plurality of abamectin B2a collection tubes in the sampling box simultaneously, be convenient for this device once only gather the abamectin B2a sample in different places, avoided the staff to frequently change and collect the diaphragm in the abamectin B2a collection tube, when having improved sample collection efficiency, also reduced staff's intensity of labour; through setting up the annular tube for this device not only can be in the sample of same a plurality of abamectin B2a samples of gathering, can be applicable to the sample collection in a plurality of sample plots moreover, has improved the sample acquisition volume, has the effect of promoting to abamectin B2 a's research.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural diagram of the abamectin B2a collecting cylinder of the present invention;

FIG. 3 is a schematic view of the connection between the collecting diaphragm and the semi-circular arc plate according to the present invention;

FIG. 4 is a schematic view of the connection of the ring tube and the sampling box of the present invention;

FIG. 5 is an enlarged schematic view of the present invention at A in FIG. 1;

the device comprises a support component 1, a base 10, a telescopic supporting rod 11, a sampling component 2, a sampling box 20, a protective cover 200, a placing cavity 201, an air inlet channel 202, an abamectin B2a collecting cylinder 21, a semicircular arc plate 210, a retaining ring 211, an elastic protective net 2110, a pressing ring 212, a threaded rod 213, a collecting diaphragm 22, a ring pipe 23, an air guide nozzle 230, a first manual gate valve 231, a second manual gate valve 232, an air inlet component 3, a centrifugal fan 30, an air inlet 300, an air outlet 301, a transmission rocker 302, an air inlet pipeline 31, a pipe joint 310, a connecting hose 311 and a compression spring 312.

Detailed Description

Example (b): the sampling device for enriching the abamectin B2a in the air as shown in figure 1 comprises a support assembly 1, a sampling assembly 2 and an air inlet assembly 3; the supporting assembly 1 comprises a base 10 and a telescopic supporting rod 11, wherein the telescopic supporting rod 11 is vertically arranged on the base 10;

as shown in fig. 2, 3, 4 and 5, the sampling assembly 2 includes a sampling box 20 and an abamectin B2a collection cylinder 21, the sampling box 20 is rotatably clamped at the top end of a telescopic supporting rod 11, a protective cover 200 is connected to one end of the sampling box 20 far away from the telescopic supporting rod 11 through threads, 5 placing cavities 201 are uniformly arranged in the sampling box 20, an air inlet channel 202 is arranged at a position corresponding to the position of the placing cavity 201 at one end of the sampling box 20 close to the telescopic supporting rod 11, the number of the abamectin B2a collection cylinders 21 is consistent with that of the placing cavities 201, the abamectin B2a collection cylinder 21 is formed by buckling two semicircular plates 210 and is movably clamped in the placing cavity 201, and 3 collection diaphragms 22 are movably clamped between the two semicircular plates 210; baffle rings 211 and compression rings 212 corresponding to the number of the collecting diaphragms 22 are arranged in the semicircular arc plate 210, each compression ring 212 is respectively clamped with the inner wall of the semicircular arc plate 210 in a sliding manner, a threaded rod 213 is rotatably clamped on the semicircular arc plate 210, the threaded rod 213 is respectively in threaded connection with each compression ring 212, when the collecting diaphragm 22 is used, the two semicircular arc plates 210 are buckled, and each compression ring 212 is close to the corresponding baffle ring 211 by rotating the threaded rod 213 to compress and fix the collecting diaphragm 22, so that the fixing effect of the collecting diaphragm 22 can be improved, the collecting diaphragm 22 can be conveniently detached, and the monitoring and analysis on the abamectin benzoate B2a are facilitated; the baffle ring 211 is provided with an elastic protective net 2110, and the collection diaphragm 22 is protected by the elastic protective net 2110, so that the collection diaphragm 22 is prevented from being broken due to excessive air pressure, and the reliability of the device is improved; the annular pipe 23 is arranged at one end of the sampling box 20, the annular pipe 23 is communicated with the air inlet channels 202, the annular pipe 23 is provided with the air guide nozzles 230 corresponding to the air inlet channels 202 in number, a first manual gate valve 231 is arranged between every two adjacent air guide nozzles 230, each air guide nozzle 230 is provided with a second manual gate valve 232, the air guide nozzles 230 can be connected with the pipe connectors 310, and by arranging the annular pipe 23, the first manual gate valves 231 and the second manual gate valves 232, abamectin B2a samples in different places can be collected by using different collecting diaphragms 22, and abamectin B2a samples in the air can be collected by using all the collecting diaphragms 22 in the same place;

as shown in fig. 1 and 5, the air intake assembly 3 includes a centrifugal fan 30 and an air intake duct 31, the centrifugal fan 30 is fixedly disposed on the telescopic support rod 11, the centrifugal fan 30 is provided with an air inlet 300 and an air outlet 301, the centrifugal fan 30 is connected with a transmission rocker 302 through gear engagement, the air intake duct 31 is fixedly disposed on the telescopic support rod 11, the upper end of the air intake duct 31 is movably connected with the air intake passage 202 through a pipe joint 310, and the lower end is connected with the air inlet 300 through a connection hose 311; the pipe joint 310 is movably sleeved at the end of the air inlet pipeline 31, a compression spring 312 is arranged at the joint, one end of the compression spring 312 is abutted against the pipe joint 310, the other end of the compression spring 312 is abutted against the inner wall of the air inlet pipeline 31, and the compression spring 312 is arranged at the joint of the pipe joint 310 and the air inlet pipeline 31, so that the pipe joint 310 is connected with the air inlet channel 202 in the rotating process of the sampling box 20.

When the device is used, the device is moved to a sampling place, the collecting diaphragm 22 is placed between the baffle ring 211 and the pressing ring 212 of the semicircular arc plates 210, the two semicircular arc plates 210 are buckled, each pressing ring 212 is close to the corresponding baffle ring 211 by rotating the threaded rod 213, the collecting diaphragm 22 is pressed and fixed, and the abamectin B2a collecting cylinder 21 is placed in the placing cavity 201 of the sampling box 20; then the height of the telescopic supporting rod 11 is adjusted to a proper position, if the abamectin B2a sample is collected at different places, all the first manual gate valves 231 on the annular pipe 23 are closed, and the second manual gate valve 232 on the corresponding air guide nozzle 230 is opened, the pipe joint 310 is connected with each air guide nozzle 230 in a replacement way, the transmission rocker 302 is used for driving the centrifugal fan 30 to rotate, air is introduced into each abamectin B2a collecting cylinder 21, and is discharged from the air outlet 301, the abamectin B2a in the air is trapped and collected by the collection diaphragm 22, if the abamectin B2a sample is required to be collected at the same place, all the first manual gate valves 231 are opened, one second manual gate valve 232 is reserved to be in an open state, and closing all the rest parts, repeating the operation, and carrying out laboratory test analysis on the abamectin B2a sample intercepted on the collection diaphragm 22 after collection.

Claims

1. A sampling device for enriching abamectin B2a in air is characterized by comprising a supporting assembly (1), a sampling assembly (2) and an air inlet assembly (3); the supporting assembly (1) comprises a base (10) and a telescopic supporting rod (11), and the telescopic supporting rod (11) is vertically arranged on the base (10); the sampling assembly (2) comprises a sampling box (20) and an abamectin B2a collecting cylinder (21), the sampling box (20) is rotatably clamped at the top end of a telescopic supporting rod (11), a protective cover (200) is in threaded connection with one end, far away from the telescopic supporting rod (11), of the sampling box (20), 4-8 placing cavities (201) are uniformly formed in the sampling box (20), an air inlet channel (202) is arranged at a position, corresponding to the placing cavity (201), of one end, close to the telescopic supporting rod (11), of the sampling box (20), the number of the abamectin B2a collecting cylinders (21) is corresponding to the placing cavity (201), the abamectin B2a collecting cylinder (21) is formed by buckling two semicircular plates (210) and is movably clamped in the placing cavity (201), and 2-4 collecting diaphragms (22) are movably clamped between the two semicircular plates (210); air inlet assembly (3) include centrifugal fan (30) and admission line (31), and centrifugal fan (30) are fixed to be set up on telescopic support rod (11), are provided with air inlet (300) and gas outlet (301) on centrifugal fan (30), are connected with transmission rocker (302) through gear engagement on centrifugal fan (30), admission line (31) are fixed to be set up on telescopic support rod (11), admission line (31) upper end through coupling (310) with admission passage (202) swing joint, the lower extreme through coupling hose (311) with air inlet (300) are connected.

2. The sampling device for enriching abamectin B2a in air according to claim 1, wherein a baffle ring (211) and a compression ring (212) are arranged in the semicircular plate (210) and correspond to the number of the collection diaphragms (22), each compression ring (212) is slidably clamped with the inner wall of the semicircular plate (210), a threaded rod (213) is rotatably clamped on the semicircular plate (210), and the threaded rod (213) is in threaded connection with each compression ring (212).

3. The sampling device for enriching abamectin B2a in air according to claim 2, wherein an elastic protective net (2110) is arranged on the baffle ring (211).

4. The sampling device for enriching abamectin B2a in air according to claim 1, wherein the pipe joint (310) is movably sleeved at an end of the air inlet pipe (31), a compression spring (312) is arranged at the joint, one end of the compression spring (312) abuts against the pipe joint (310), and the other end of the compression spring abuts against the inner wall of the air inlet pipe (31).

5. The sampling device for the abamectin B2a in the enriched air according to claim 1, wherein a ring pipe (23) is arranged at one end of the sampling box (20), the ring pipe (23) is communicated with the air inlet channels (202), air guide nozzles (230) corresponding to the air inlet channels (202) in number are arranged on the ring pipe (23), a first manual gate valve (231) is arranged between every two adjacent air guide nozzles (230), a second manual gate valve (232) is arranged on each air guide nozzle (230), and the air guide nozzles (230) can be connected with a pipe connector (310).