CN218600969U

CN218600969U - But gaseous sampling subassembly of recoil that VOC detected

Info

Publication number: CN218600969U
Application number: CN202222609631.6U
Authority: CN
Inventors: 黄红娟; 王苏成; 舒烨
Original assignee: Jiangsu Lanchuang Intelligent Technology Co ltd
Current assignee: Jiangsu Lanchuang Intelligent Technology Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-03-10
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses a gaseous sampling subassembly of can backflushing that VOC detected, be in including sampling head casing and setting filter core body in the sampling head casing inner chamber, filter core body contains at least two sets of secondary filter cores that are the interval setting on the air current direction, and on gaseous backflushing direction, arbitrary constitute the backflushing chamber between the recoil blow-off end of secondary filter core and the recoil inlet end of adjacent secondary filter core, the drain has been seted up corresponding to the backflushing chamber on the sampling head casing, drain department corresponds and is provided with and opens or closed the shutoff subassembly of drain, the secondary filter core that sets up through a plurality of intervals can carry out the multistage formula with the filter path when backflushing and cut apart for each secondary filter core can carry out gaseous recoil respectively.

Description

But gaseous sampling subassembly of recoil that VOC detected

Technical Field

The utility model belongs to the gas sampling field, in particular to gaseous sampling subassembly of recoil that VOC detected.

Background

When carrying out content detection to organic volatile gas (VOC) in the environment, need earlier to gas sampling in the environment, in gaseous sampling head subassembly, filter dust and debris through the filter core to carry out gaseous recoil through the sampling gas circuit to gaseous sampling head subassembly after the gaseous sampling of at every turn, thereby carry out the automatically cleaning to the filter core, prevent that the filter core from blockking up.

However, because the diameter of the gas sampling head is generally a slender tube structure, the length of the filter element in the shell of the sampling head is relatively long and thin, and when gas is backflushed, part of particles are clamped by the filter element in the backflushing separation process and cannot be backflushed out due to the relatively long filter channel, so that the backflushing effect is limited.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the utility model provides a VOC detection backflushable gas sampling assembly, which can realize multi-stage segmentation of a filter channel during backflushing through a plurality of secondary filter elements arranged at intervals, so that each secondary filter element can respectively carry out gas backflushing.

The technical scheme is as follows: in order to achieve the above purpose, the technical scheme of the utility model is as follows:

a backflushing gas sampling assembly for VOC detection comprises a sampling head shell and a filter element body arranged in an inner cavity of the sampling head shell, wherein the filter element body comprises at least two groups of secondary filter elements arranged at intervals in an airflow direction, a backflushing cavity is formed between a backflushing sewage discharge end of any one secondary filter element and a backflushing air inlet end of an adjacent secondary filter element in the gas backflushing direction, a sewage discharge outlet is formed in the sampling head shell corresponding to the backflushing cavity, and a plugging assembly for opening or closing the sewage discharge outlet is correspondingly arranged at the sewage discharge outlet; and each secondary filter element independently backflushs and discharges sewage through backflushing gas.

Furthermore, a plurality of circumferentially distributed sewage outlets are respectively formed on the sampling head shell corresponding to each backflushing cavity.

Furthermore, be provided with limit structure corresponding to each secondary filter core in the inner chamber of sampling head casing, secondary filter core passes through limit structure relatively fixed in the sampling head casing.

Furthermore, limit structure includes that two sets of settings are at the retaining ring of secondary filter core recoil inlet end and recoil blowdown end respectively.

Furthermore, a separation net is respectively arranged in each backflushing cavity, and the separation net is positioned behind the sewage discharge outlet in the direction of backflushing airflow; the separation net is used for separating particles which are backflushed and separated from the secondary filter element.

Further, the plugging assembly comprises a sliding sleeve which slides outside the sampling head shell in a sealed and damping manner; the sliding sleeve is closed or far away from the sewage draining exit.

Furthermore, a lock accessory which can lock the sliding sleeve on the sampling head shell in an elastic mode is arranged on the sliding sleeve.

Has the advantages that: the utility model discloses a fall into a plurality of secondary filter cores that are the interval setting with longer filter core body to recoil filter channel when backflushing with gas carries out the multistage formula and cuts apart, forms the recoil filter channel of a plurality of little distances, and each secondary filter core falls into the particulate matter that breaks away from by gas recoil and discharges in the recoil chamber and through the drain, makes each secondary filter core can carry out gas recoil respectively, thereby filter channel is blockked up when avoiding backflushing, promotes gas recoil effect.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is a schematic half-section view of the overall structure of the present invention;

FIG. 3 isbase:Sub>A schematic view of the A-A half section of the present invention;

fig. 4 is a schematic view of one of the secondary filter elements of the present invention in a backflush state.

Detailed Description

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

As shown in the accompanying drawings 1 to 4, a backflush gas sampling assembly for VOC detection comprises a sampling head shell 1 and a filter element body arranged in an inner cavity of the sampling head shell, wherein the filter element body comprises at least two sets of secondary filter elements 2 arranged at intervals in the air flow direction, a backflush cavity 3 is formed between a backflush sewage discharge end of each secondary filter element 2 and a backflush air inlet end of the adjacent secondary filter element in the gas backflush direction, namely the interval between any two adjacent secondary filter elements 2 forms the backflush cavity 3, and the backflush cavity 3 is used for receiving and containing particles separated after the backflush of the secondary filter elements. The sampling head shell 1 is provided with at least one drain outlet 4 corresponding to the backflushing cavity 3, the drain outlet 4 is correspondingly provided with a plugging component 5 for opening or closing the drain outlet, when backflushing, the drain outlet is opened to be used for backflushing airflow to flow out, and meanwhile, the particles separated from the drain outlet are discharged along with the airflow.

The working mode is as follows: during backflushing, gas enters backflushing gas from the tail end of the sampling head shell 1, and the secondary filter elements 2 perform backflushing exhaust in sequence in the direction of backflushing airflow. The plugging component on the drain outlet of one backflushing cavity 3 closest to the sampling head shell 1 is opened, so that the backflushing cavity is communicated with the outside through the drain outlet, the drain outlets of the rest other backflushing cavities are still in a closed state, when gas backflushing the secondary filter element, because the gas flow is smoother through the drain outlet, a small part of the gas flow is discharged through the secondary filter element at the rear part, a large part of the backflushing gas flow is discharged through the drain outlet, after the backflushing of the secondary filter element is finished, the drain outlet of the backflushing cavity is closed, and then the backflushing is carried out on the other secondary filter elements in sequence, so that each secondary filter element can independently backflush and discharge the gas respectively.

The secondary cartridge 2 comprises the following three structural embodiments: the first embodiment is as follows: the filter holes of a plurality of groups of the secondary filter elements 2 are the same in size.

Example two: in the air current recoil direction, a plurality of groups the filtration pore of secondary filter core 2 distributes the setting from minimumly to big for each secondary filter core 2 can filter the particulate matter of different particle sizes respectively, reduces and blocks up the possibility, and when gaseous recoil, filter core recoil difficult and easy degree also just with recoil air current intensity for, guarantees the recoil effect.

And (3) implementation three: the filter holes in the secondary filter elements 2 are distributed from the back flushing air inlet side to the back flushing sewage discharge side from small to large, so that the secondary filter elements 2 can respectively filter particles with different particle sizes, the blocking possibility is reduced, and when gas is back flushed, the back flushing difficulty degree of the filter elements is just opposite to the back flushing air flow strength, and the back flushing effect is guaranteed.

The sampling head shell 1 is provided with a plurality of circumferentially distributed drain outlets 4 corresponding to the backflushing cavities 3 respectively, the airflow flux of the corresponding backflushing cavities can be increased through the plurality of drain outlets 4, and the particles separated from the backflushing cavities can be discharged conveniently.

Be provided with limit structure 6 corresponding to each secondary filter core 2 in the inner chamber of sampling head casing 1, secondary filter core 2 is fixed in the sampling head casing relatively through limit structure 6, limit structure 6 includes two sets of fender rings that set up respectively at secondary filter core 2 recoil inlet end and recoil blowdown end, prevents each secondary filter core drunkenness.

Each backflushing cavity 3 is internally provided with a separation net 7, and the separation net 7 is positioned behind the sewage outlet 4 in the direction of backflushing airflow; the separation net 7 separates particles separated by backflushing from the secondary filter element, the meshes of the separation net are larger than the filter holes of the corresponding secondary filter element, the separated particles are blocked to a certain degree through the separation net, and the particles reducing the backflushing are attached to the adjacent secondary filter elements.

The plugging component 5 comprises a sliding sleeve 8, and the sliding sleeve 8 slides outside the sampling head shell 1 in a sealed and damping manner; the sliding sleeve is closed or is far away from the sewage draining port 4, the inner side of the sliding sleeve 8 is provided with a sealing ring, and the sewage draining port is sealed through the sealing ring.

The sliding sleeve 8 is provided with a lock accessory 9 which can lock and loosen the sliding sleeve on the sampling head shell 1, and the lock accessory is a bolt piece arranged on the sliding sleeve.

The plugging component 5 may also be a plug, such as a plug block, a stud, or other structures.

The above description 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, a plurality of modifications and decorations can be made, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a gaseous sampling subassembly of recoil that VOC detected, includes sampling head casing (1) and sets up filter core body in the sampling head casing inner chamber, its characterized in that: the filter element body comprises at least two groups of secondary filter elements (2) which are arranged at intervals in the airflow direction, a backflushing cavity (3) is formed between the backflushing sewage discharge end of any one secondary filter element (2) and the backflushing air inlet end of the adjacent secondary filter element in the gas backflushing direction, a sewage discharge outlet (4) is formed in the sampling head shell (1) corresponding to the backflushing cavity (3), and a plugging component (5) for opening or closing the sewage discharge outlet is correspondingly arranged at the sewage discharge outlet (4); and each secondary filter element independently backflushs and discharges sewage through backflushing gas.

2. A VOC detecting backflushable gas sampling assembly according to claim 1, wherein: the sampling head shell (1) is provided with a plurality of circumferentially distributed sewage outlets (4) corresponding to the backflushing cavities (3).

3. The VOC-detected backflushable gas sampling assembly according to claim 1, wherein: the sampling head is characterized in that limiting structures (6) are arranged in the inner cavity of the sampling head shell (1) corresponding to the secondary filter elements (2), and the secondary filter elements (2) are relatively fixed on the sampling head shell through the limiting structures (6).

4. A VOC detecting backflushable gas sampling assembly according to claim 3, wherein: the limiting structure (6) comprises two groups of baffle rings which are respectively arranged at a backflushing air inlet end and a backflushing sewage discharging end of the secondary filter element (2).

5. A VOC detecting backflushable gas sampling assembly according to claim 1, wherein: each backflushing cavity (3) is internally provided with a separation net (7), and the separation net (7) is positioned behind the sewage outlet (4) in the direction of backflushing airflow; the separation net (7) separates the particles which are back-washed and separated from the secondary filter element.

6. A VOC detecting backflushable gas sampling assembly according to claim 1, wherein: the plugging assembly (5) comprises a sliding sleeve (8), and the sliding sleeve (8) slides outside the sampling head shell (1) in a sealed damping mode; the sliding sleeve is closed or far away from the sewage draining exit (4).

7. A VOC detected backflushable gas sampling assembly as recited in claim 6, wherein: the sliding sleeve (8) is provided with a lock accessory (9) which can lock the sliding sleeve on the sampling head shell (1).