CN211877521U

CN211877521U - Gas sampling socket

Info

Publication number: CN211877521U
Application number: CN202020541650.8U
Authority: CN
Inventors: 李艺
Original assignee: Shandong Institute Of Ecological Environment Planning
Current assignee: Shandong Institute Of Ecological Environment Planning
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-11-06
Anticipated expiration: 2030-04-13

Abstract

A gas sampling socket and a plug, the sampling socket comprises a shell, one end of the shell is provided with an air outlet, and a one-way sealing device for plugging the air outlet is arranged in an inner cavity of the shell; the sampling plug comprises a tube shell, a telescopic tube is connected onto the tube shell, a push block is arranged at the front end of the tube shell, and an air inlet is formed in the side wall of the push block. The sampling socket is installed on the air flue outer wall, and sampling plug connection is at the sampling rifle front end, and removal sampling rifle makes the sampling plug well to adjusting with the sampling socket. The sampling plug and the sampling socket form sealing firstly, and then the one-way sealing device in the sampling socket is opened, so that sampling can be carried out; when sampling is finished, the one-way sealing device is returned, the sampling gun sucks the gas in the sampling plug away, and finally the sealing between the sampling plug and the sampling socket is released. The utility model discloses a butt joint of plug and socket has realized that the automatic butt joint is sealed, can not make gas leakage, and outside atmosphere also can not get into the sampling gas, guarantees the primitive nature of sample, and the sampling is safe, reliable and accurate.

Description

Gas sampling socket

Technical Field

The utility model relates to a device for being directed at various gaseous analysis of sampling belongs to gaseous sampling technical field.

Background

Because various gases are generated by combustion and chemical reaction, the monitoring of a fixed gas pollution source is crucial, and in the working process of environment monitoring personnel, a sampling device is often required to be arranged at a specific place to collect samples of various gases at regular time and quantity. The appointed position is put to sampling equipment, inserts the monitoring hole with the sampling rifle, because the rifle body is great with the monitoring hole clearance at this in-process, gas inevitable can take place to leak the dew phenomenon, not only leads to the pollution to the environment and to sampling personnel's health hazard, and the outside air of this process can flow into the air flue moreover, leads to the sample of gathering to be diluted, influences the accuracy of monitoring data, and the data that obtain are not accurate enough.

The prior art realizes opening and closing and sealing of sampling holes through various sampling hole plugging devices, prevents to reveal, but the structure is all very complicated, and the operation is inconvenient, and sealed effect is unsatisfactory. For example, the patent document CN105276596A discloses a sealing device for sampling holes of boiler air passage and CN105784426A discloses a plugging device for sampling holes of air passage.

The CN205941100U discloses a sampling hole inflation plug for pollution source smoke monitoring and the CN106151528A discloses a sampling hole bracket plug for pollution source smoke monitoring, wherein the air bag is expanded to completely seal the gap between the sampling gun and the sampling hole. Although the sampling device can play a good sealing role in sampling, the air bag needs to be placed into and taken out of the sampling hole before and after sampling, and gas leakage can be caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that current gas sampling technique exists, the utility model provides a can realize self-sealing's gas sampling socket and plug, can not reveal in effectively guaranteeing the sampling process, guarantee the primitive nature of sample.

The utility model discloses a gaseous sampling socket and plug adopts following technical scheme:

the gas sampling socket comprises a shell, wherein two ends of an inner cavity of the shell are opened, one end of the inner cavity of the shell is provided with a gas outlet hole, and a one-way sealing device for plugging the gas outlet hole is arranged in the inner cavity of the shell. The one-way sealing device comprises a core seat and a guide partition plate which are arranged in an inner cavity of the shell, a guide rod is arranged on the core seat, the guide rod is arranged in a guide hole formed in the guide partition plate, and a spring is sleeved on the guide rod between the core seat and the guide partition plate. And a sealing gasket is arranged on the core seat. The spring promotes the core print seat and blocks up the venthole, guarantees that the gas in the air flue can not reveal.

The gas sampling plug comprises a tube shell, wherein an elastic sealing device is connected onto the tube shell, a push block is arranged at the front end of the tube shell, an air inlet hole is formed in the side wall of the push block, and the air inlet hole is communicated with the inner cavity of the tube shell. The elastic sealing device adopts a telescopic pipe, and a sealing gasket is arranged at the outer end of the telescopic pipe. The front end of the tube shell is provided with a camera so as to observe the moving position of the sampling plug and the alignment condition of the sampling plug and the sampling socket.

The outer diameter of the push block is smaller than that of the air outlet hole in the sampling socket, and the length of the push block is larger than the distance between the outer end face of the air outlet hole in the sampling socket and the core seat, so that the core seat can be opened by the push block to enable the air outlet hole to be communicated with the inner cavity of the shell. The distance between the front end of the push block and the outer end of the extension tube enables the extension tube to be in contact with the shell in the sampling socket before the push block is in contact with the core seat, so that a channel between the sampling plug and the sampling socket is isolated from the outside atmosphere before sampling, the sampling in a sealed state is realized, leakage cannot occur, and the sampling accuracy is also ensured. The front end of the push block is arranged in the telescopic pipe, so that the push block is protected.

During the use, the sampling socket is installed on the air flue outer wall, and the tip at the sampling rifle is connected through the control valve to the sampling plug, removes the sampling rifle and makes the sampling plug adjust well with the sampling socket. The sampling plug forms a seal with the sampling socket through the telescopic pipe, then the one-way sealing device in the sampling socket is opened, and the sampling gun and the control valve are started to sample. When sampling is finished, the one-way sealing device is returned to ensure that gas cannot be leaked, the sampling gun continues to keep sampling operation, the gas in the sampling plug is sucked away, then the control valve is closed, finally the sealing between the sampling plug and the sampling socket is released, and sampling is finished.

The utility model discloses a butt joint of plug and socket has realized that automatic butt joint is sealed, has effectively guaranteed to make gas leakage, and outside atmosphere also can not get into the sampling gas, guarantees the primitive nature of sample, and sampling safety, reliable and accuracy, simple structure, convenient operation.

Drawings

Fig. 1 is a schematic structural diagram of a gas sampling socket and a plug of the present invention.

In the figure: 1. the air duct comprises an air duct wall 2, a housing 3, a guide rod 4, a spring 5, a core seat 6, a sealing gasket 7, an air outlet hole 8 and a guide partition plate 9; 10. the device comprises an extension tube, 11, a sampling plug, 12, a push rod, 13, an air inlet, 14, an electric control valve, 15, a sealing gasket and 16, a bracket; 17. a sampling gun.

Detailed Description

Fig. 1 shows a gas sampling socket and plug according to the present invention.

Sampling socket, including casing 3, the one end of casing has the flange to install on the air flue outer wall 2 of air flue 1, the other end of casing is venthole 8, casing 3's inner chamber and 1 intercommunication of air flue. A one-way sealing device for sealing the air outlet hole 8 is arranged in the inner cavity of the shell 3. The one-way sealing device comprises a core seat 6 and a guide partition plate 9 which are arranged in an inner cavity of a shell 3, wherein a guide rod 4 is arranged on the core seat 6, the guide rod 4 is arranged in a guide hole formed in the guide partition plate 9, a spring 5 is sleeved on the guide rod 4, and the spring 5 is positioned between the core seat 6 and the guide partition plate 9. The guide partition 9 is provided with holes through which gas passes. The outer end of the core seat 6 is provided with a sealing gasket 7. The core print 6 presses to 8 outer fringe of venthole under the elasticity promotion of spring 5, blocks up venthole 8 through taking elastic sealed pad 7, guarantees that the gas in the air flue 1 can not reveal.

The sampling plug comprises a tube shell 11, and an elastic sealing device is arranged on the outer side of the tube shell 11. The elastic sealing device adopts an extension tube 10 made of the existing rubber, and the outer end of the extension tube 10 is provided with a sealing gasket 15. The front end of the tube shell 11 is provided with a push block 12, the side wall of the push block 12 is provided with an air inlet 13, the air inlet 13 is communicated with the inner cavity of the tube shell 11, and the rear end of the inner cavity of the tube shell 11 is open, so that the sampling gas can enter the sampling gun 20 through the tube shell 11 and the electric control valve 14.

The external diameter of ejector pad 12 is less than the external diameter of venthole 8 in the sampling socket, and the length of ejector pad 12 is greater than the distance between the outer terminal surface (8 outer ends of venthole) of casing 3 and core print 6 in the sampling socket to guarantee that ejector pad 12 can open core print 6, make venthole 8 and the inner chamber intercommunication of casing 3. The distance between the front end of the push block 12 and the sealing gasket 15 at the outer end of the telescopic pipe 10 can ensure that the contact between the telescopic pipe 10 and the shell 3 in the sampling socket is prior to the contact between the push block 12 and the core seat 6, so that the channel between the sampling plug and the sampling socket is isolated from the external atmosphere before sampling, the sampling is carried out in a sealed state, the leakage cannot occur, and the sampling accuracy is also ensured. The front end of the push block 12 is preferably not exposed out of the outer end of the telescopic tube 10, so that the push block 12 is protected.

In order to facilitate observation of the moving position of the sampling plug and the alignment of the sampling plug and the sampling socket, a camera 16 may be mounted at the front end of the case 11.

The process of inserting the sampling plug into the sampling receptacle is as follows.

The sampling socket is arranged on the outer wall 2 of the air flue 1 through a flange at one end of the shell 3, and the sampling plug is connected to the end part of the sampling gun 20 through the tube shell 11. The sampling gun 20 is moved towards the air passage 1, the moving direction of the sampling plug and the alignment condition of the sampling plug and the sampling socket can be observed through the miniature camera 16, and the pipe shell 11 is positioned at the position where the pipe shell can enter the air outlet 8 to continue to be pushed. The gasket 15 at the front end of the bellows 10 is first brought into contact with the front end of the housing 3 and compressed, sealing the envelope 11. Then the pushing block 12 enters the air outlet hole 8 and pushes the core seat 6 to move, the spring 5 is compressed, the core seat 6 forms a gap with the front end of the shell 3, the air outlet hole 8 is communicated with the inner cavity of the shell 3, and air enters the tube shell 11 through an air inlet hole 13 in the side wall of the pushing block 12. The electrically controlled valve 14 is opened, and the sample can be taken by the sampling gun 20.

When the sampling is finished, the push block 12 moves backwards along with the tube shell 11, and the core seat 6 is pressed at the front end of the inner cavity of the shell 3 under the action of the spring 5 to block the air outlet 8, so that the air is prevented from being leaked. At this time, the sampling gun 20 continues to maintain the sampling operation, the air in the tube housing 11 and the telescopic tube 10 is sucked away, then the electric control valve 14 is closed, the telescopic tube 10 is separated from the contact with the front end of the shell 3, and the sampling is finished.

The gas can not be leaked in the process, the external atmosphere can not enter the sampling gas, and the safety, reliability and accuracy of sampling are guaranteed.

Claims

1. A gas sampling socket is characterized by comprising a shell, wherein two ends of an inner cavity of the shell are opened, one end of the inner cavity of the shell is provided with a gas outlet hole, and a one-way sealing device for plugging the gas outlet hole is arranged in the inner cavity of the shell.

2. The gas sampling socket of claim 1, wherein the one-way sealing device comprises a core seat and a guide partition plate arranged in the inner cavity of the housing, the core seat is provided with a guide rod, the guide rod is arranged in a guide hole formed in the guide partition plate, and a spring is sleeved on the guide rod between the core seat and the guide partition plate.

3. A gas sampling socket according to claim 2 wherein the cartridge is provided with a sealing gasket.