CN212180379U

CN212180379U - Simple gas closed sampling device

Info

Publication number: CN212180379U
Application number: CN202020906422.6U
Authority: CN
Inventors: 邬飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-12-18
Anticipated expiration: 2030-05-26

Abstract

The utility model belongs to the technical field of sampling, and relates to a simple gas closed sampling device, which comprises a pressure reducing valve, a sampling valve, a replacement valve, an ejector and a bladder; the pressure reducing valve is connected with the ejector; the pressure reducing valve is connected to the ejector through a sampling valve and a replacement valve in sequence; the sampling valve is connected with the bladder; the bladder is connected with a replacement valve; the pressure gauge is arranged between the pressure reducing valve and the ejector; the replacement valve is an adjusting valve or a spring angle valve; the sampling valve is a regulating valve or a spring angle valve. The utility model discloses a gas appearance flows through the sprayer and forms the airtight replacement of vacuum realization sample bladder interior gas appearance and sample, and simple structure and with low costs, the qualified representatives of gas appearance of getting can guarantee the accuracy of analysis result, sample process easy operation, safe and reliable, and application prospect is wide.

Description

Simple gas closed sampling device

Technical Field

The utility model belongs to the technical field of the sample, a gaseous airtight sampling device of simple and easy type is related to.

Background

In chemical production, gas components and the like in a pipeline in the production process often need to be detected, the gas needs to be sampled firstly, the existing sampling is to arrange a pressure reducing valve, a sampling valve and a bladder (as shown in figure 1) on a sampling pipeline, when qualified gas samples are required to be taken, the gas samples entering the bladder need to be sampled and lofted for multiple times to take representative gas samples, but the sampling arrangement shown in figure 1 is to vent the gas samples in the bladder at a high point on site during lofting, so that the safety requirements are not met; because the toxic gas sampling needs to be closed to sample according to the safety inspection requirement, the site is not allowed to be emptied.

At present, a part of chemical enterprises adopt a steel cylinder closed sampler for sampling (as shown in figure 2); although the safety requirement is met, the following problems exist, 1) the complete set of the device is high in cost; 2) the steel cylinder is heavy, and is inconvenient to carry when a plurality of gas samples are taken; 3) the steel cylinder quick connector is easy to leak, and the safety is reduced; 4) the ball bladder interface is arranged, but the outlet is connected with the torch, because the torch pipeline is slightly pressurized, the ball bladder is pressed to discharge without entering the torch, the ball bladder cannot be hermetically replaced, and only the ball bladder can be taken down to be discharged, inflated and discharged on site, so that the replacement is carried out; thus, the operation is troublesome, and the requirement of closed sampling cannot be met; therefore, for enterprises installing the steel cylinder sealed sampler, the steel cylinder sealed sampler is inconvenient to use and mostly idle, and the investment cost is wasted.

SUMMERY OF THE UTILITY MODEL

To the technical problem of inconvenient, with high costs of taking a sample in the airtight sampler of current, the utility model provides a gaseous airtight sampling device of simple and easy type, sample easy operation utilizes the ejector vacuum principle to carry out the airtight replacement of bladder, can realize airtight sample completely with ordinary bladder, and the security is good, does not have extra design evacuation equipment simultaneously, and simple structure and investment cost are low, and economic nature is good.

In order to realize the purpose, the utility model discloses a technical scheme is:

a simple gas-tight sampling device comprises a pressure reducing valve, a sampling valve, a replacement valve, an ejector and a bladder; the pressure reducing valve is connected to the ejector; the pressure reducing valve is connected to the ejector through a sampling valve and a replacement valve in sequence; the sampling valve is connected into the bladder; the bladder is connected to the replacement valve.

Furthermore, the simple gas-tight sampling device further comprises a pressure gauge arranged between the pressure reducing valve and the ejector.

Further, the replacement valve is a regulating valve or a spring angle valve.

Further, the sampling valve is a regulating valve or a spring angle valve.

The utility model has the advantages that:

1. the simple gas-tight sampling device comprises a pressure reducing valve, a sampling valve, a replacement valve, an ejector and a bladder; the pressure reducing valve is connected with the ejector; the pressure reducing valve is connected to the ejector through a sampling valve and a replacement valve in sequence; the sampling valve is connected with the bladder; the bladder is connected to the replacement valve. The ejector pumping port is in a vacuum state through the adjustment of a pressure reducing valve; through the switch of sampling valve and replacement valve for fill in the bladder gas appearance and inhale the torch through the sprayer vacuum and replace, easy operation can realize airtight sample.

2. The utility model discloses in, whole device comprises relief pressure valve, sample valve, replacement valve, manometer and sprayer, and simple structure does not add extra vacuum apparatus, and is with low costs.

3. In the utility model, the sampling valve is a spring angle valve, and the operation is convenient and fast when the spring angle valve is used; the replacement valve is a spring angle valve, if the spring angle valve is adopted, the spring angle valve only needs to be pulled open during replacement, the replacement valve is automatically closed by elasticity at ordinary times, air suction is avoided, the tightness and safety of the device are guaranteed, qualified gas samples are taken simultaneously, the accuracy of analysis results is guaranteed, the operability is strong, the safety and the reliability are high, the economy is good, and the valve can be widely used for sampling chemical gas.

Drawings

Fig. 1 is a schematic view of a sampling device according to a first prior art of the present invention;

fig. 2 is a schematic view of a sampling device according to the second prior art of the present invention;

fig. 3 is a schematic view of a sampling device provided in embodiment 1 of the present invention;

fig. 4 is a schematic view of a sampling device provided in embodiment 2 of the present invention;

fig. 5 is a schematic view of a sampling device provided in embodiment 3 of the present invention;

wherein:

1-a pressure reducing valve; 2-a sampling valve; 3-replacing the valve; 4-an ejector; 5, a bladder; 6-pressure gauge.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings and examples.

The utility model provides a simple gas-tight sampling device, which comprises a pressure reducing valve 1, a sampling valve 2, a replacement valve 3, an ejector 4 and a bladder 5; the pressure reducing valve 1 is connected to an ejector 4; the pressure reducing valve 1 is connected to the ejector 4 through the sampling valve 2 and the replacement valve 3 in sequence; the sampling valve 2 is connected to the bladder 5; the bladder 5 is connected to the displacement valve 3.

The utility model provides a gaseous airtight sampling device of simple and easy type is still including setting up manometer 6 between relief pressure valve 1 and sprayer 4.

The utility model discloses in, replacement valve 3 is governing valve or spring angle valve. The sampling valve 2 is a regulating valve or a spring angle valve.

The utility model discloses in, simple and easy type airtight sampling device's sampling method, including following step:

1) connecting a sampling pipeline to a pressure reducing valve 1; the ejector 4 is connected into a flare pipeline; the bladder 5 is connected, and the pressure reducing valve 1, the sampling valve 2 and the replacement valve 3 are all in a closed state; adjusting the pressure of the gas sample flowing through the sampling pipeline through a pressure reducing valve 1;

2) opening the replacement valve 3, keeping the replacement valve 3 in a vacuum state, and deflating the bladder 5; opening the sampling valve 2, filling the gas sample into the bladder 5 from the sampling pipeline, closing the sampling valve 2, opening the replacement valve 3, replacing the gas sample filled into the bladder 5 by the replacement valve 3 and the ejector 4 and sucking the gas sample into the torch pipeline, repeating the steps for two times and three times, and finishing the replacement of the gas sample in the bladder (5) to obtain a qualified gas sample;

3) opening the sampling valve 2, and filling the qualified gas sample into the bladder 5; the sample valve 2, the replacement valve 3 and the pressure reducing valve 1 are closed.

The utility model discloses in step 1), open relief pressure valve 1, the gas appearance in the sample pipeline passes through sprayer 4 and gets into the torch pipeline to according to the pressure that 6 manometers show, adjust relief pressure valve 1's valve aperture, the pressure of gas appearance is flowed through in the adjustment, and gas appearance flow direction torch pipeline 2-3 minutes back, get into step 2).

Example 1

Referring to fig. 3, in the present embodiment, the pressure reducing valve 1 is connected to the injector 4; the pressure reducing valve 1 is connected into an injector 4 after passing through a sampling valve 2 and a replacement valve 3; the sampling valve 2 is connected to the bladder 5; the bladder 5 is connected to the displacement valve 3.

In this embodiment, a pressure gauge 6 is provided on a pipe connecting the pressure reducing valve 1 to the injector 4, and the pressure gauge 6 is provided before the secondary line of the sampling valve 2.

In this embodiment, the ejector 4 is a vacuum obtaining device that uses fluid to transfer energy and mass, and uses air flow with certain pressure to be ejected through nozzles symmetrically and uniformly distributed with certain side slopes, and the air flow is converged on a focus. Since the jet gas flow rate is extremely high, the pressure energy is converted into velocity energy, so that the suction area is reduced in pressure to generate vacuum.

This embodiment, it is concrete, sampling valve 2 links to each other with replacement valve 3, and has the sample connection between two valves, is connected with bladder 5 on the sample connection, and sampling valve 2 inserts in bladder 5, and bladder 5 inserts in replacement valve 3.

In this embodiment, the replacement valve 3 is a regulator valve. The sampling valve 2 is a regulating valve.

In the present embodiment, the opening or closing of the substitution valve 3 and the sampling valve 2 is adjusted by manual rotation.

Example 2

Referring to fig. 4, unlike embodiment 1, in the present embodiment, the replacement valve 3 is a spring angle valve. The sampling valve 2 is a regulating valve.

In this embodiment, when the replacement valve 3 is a spring angle valve, and the gas sample in the bladder 5 needs to be replaced in the flare pipeline, the replacement valve 3 is opened (or pulled) to be sucked into the flare pipeline by the vacuum of the ejector, and the replacement valve 3 is normally in an automatic closing state by the elastic force, so that air is prevented from entering from the replacement valve 3, the tightness of the replacement valve 3 is ensured, and the replacement valve is safe and reliable.

Example 3

Referring to fig. 5, the present embodiment is different from embodiment 1 in that the replacement valve 3 is a spring angle valve. The sampling valve 2 is a spring angle valve.

In this embodiment, when the replacement valve 3 is a spring angle valve and the gas sample in the bladder 5 needs to be replaced into the flare pipeline, the replacement valve 3 is pressed open (or pulled open), the gas sample in the bladder 5 is sucked into the flare pipeline in vacuum by the ejector 4, and the replacement valve 3 is automatically closed by the elastic force at ordinary times, so that the tightness of the replacement valve 3 is ensured, and the safety and reliability are ensured.

In this embodiment, when sampling valve 2 adopts the spring angle valve, need open sampling valve 2 convenient and fast to the time of inflating the gas appearance in bladder 5.

In this embodiment, the sampling method includes:

preparation before sampling. Connecting a sampling pipeline into a pressure reducing valve 1, and connecting an ejector 4 into a flare pipeline; during sampling, the bladder 5 is connected to a sampling port, and the pressure reducing valve 1, the sampling valve 2 and the replacement valve 3 are checked to be in a closed state;

1) the line replacement is sampled first. Opening the pressure reducing valve 1, adjusting the pressure (the pressure is observed from a pressure gauge 6 and is generally about 0.3 Mpa) of the gas sample flowing through by the opening size of a valve of the pressure reducing valve 1, placing the gas sample in the sampling pipeline into a torch pipeline for replacement for 2-3 minutes, and then entering the step 2) to start the replacement of the bladder;

2) the bladder is then replaced. Opening the replacement valve 3 (adopting a spring angle valve which is opened during replacement and is automatically closed by elasticity at ordinary times to prevent air suction), wherein the replacement valve is in a vacuum state, and the bladder 5 is deflated; then the sampling valve 2 is opened to charge the air sample into the bladder 5; closing the sampling valve 2, opening the replacement valve 3, so that the gas sample in the bladder 5 is sucked into a torch pipeline in vacuum through the ejector 4 through the replacement valve 3, repeating the process for two times and three times, finishing the replacement of the gas sample in the bladder 5, and ensuring that the obtained gas sample is qualified;

3) and finally sampling. Opening the sampling valve 2 to fill the replaced qualified gas sample into the bladder 5; after sampling, closing the sampling valve 2, checking that the replacement valve 3 is closed, and closing the pressure reducing valve 1; the pressure gauge 6 should be slightly positive in the flare line at this point.

In the embodiment, because the ejector 4 and the replacement valve 3 form vacuum, when the sampling valve 2 is closed and the replacement valve 3 is opened, the gas sample in the bladder 5 can be automatically sucked into the torch pipeline to finish the closed replacement sampling of the bladder, and after the bladder is subjected to two times of closed replacement, the obtained gas sample is representative and is qualified. The embodiment effectively solves the problems that in the prior art, toxic gas is not allowed to be discharged on site, the flare pipeline is at micro-positive pressure, and the bladder 5 is difficult to discharge into the flare pipeline during inflation-exhaust replacement.

In the utility model, the gas closed sampling device has simple structure and low cost; the gas sample flows through the ejector to form vacuum to realize airtight replacement and sampling of the gas sample in the bladder, the obtained gas sample is qualified and representative, the accuracy of an analysis result can be ensured, and the method is safe, reliable, good in economical efficiency, strong in operability and wide in application prospect.

Claims

1. The utility model provides a gaseous airtight sampling device of simple and easy type which characterized in that: the simple gas closed sampling device comprises a pressure reducing valve (1), a sampling valve (2), a replacement valve (3), an ejector (4) and a bladder (5); the pressure reducing valve (1) is connected to an ejector (4); the pressure reducing valve (1) is connected to the ejector (4) through the sampling valve (2) and the replacement valve (3) in sequence; the sampling valve (2) is connected into the bladder (5); the bladder (5) is connected to the replacement valve (3).

2. The simplified gas-tight sampling device according to claim 1, wherein: the simple gas closed sampling device further comprises a pressure gauge (6) arranged between the pressure reducing valve (1) and the ejector (4).

3. The simplified gas-tight sampling device according to claim 1, wherein: the replacement valve (3) is an adjusting valve or a spring angle valve.

4. The simplified gas-tight sampling device according to claim 3, wherein: the sampling valve (2) is an adjusting valve or a spring angle valve.