CN212082992U

CN212082992U - Automatic sample injector for gas steel cylinder

Info

Publication number: CN212082992U
Application number: CN202020586953.1U
Authority: CN
Inventors: 乔雨; 谭智耀; 景行
Original assignee: Xinxin Instrument Technology Shanghai Co ltd
Current assignee: Xinxin Instrument Technology Shanghai Co ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-12-04
Anticipated expiration: 2030-04-20

Abstract

The utility model provides an automatic sample injector for gas steel cylinders, which comprises a power supply, a control circuit, an analyzer, a purging port, a selection valve, a filter and a plurality of sample inlets; the selection valve is provided with a first through interface, a second through interface and a plurality of third through interfaces, the first through interface is connected with the analyzer, and a purging port is connected to a pipeline between the analyzer and the selection valve in a shunting manner; the second communication port is connected with the filter; the number of the sample inlets is consistent with that of the third through ports, and each third through port is connected with each sample inlet in a one-to-one correspondence manner; the power supplies power for the control circuit, the control circuit is respectively in circuit connection with the computer, the analyzer, the purging port and the selection valve, and the computer drives the selection valve through the control circuit to enable the first communication interface to be communicated with the second communication interface or the first communication interface to be communicated with any third communication interface. In this application, convenient quick leading-in analysis appearance with gaseous or liquid state's sample.

Description

Automatic sample injector for gas steel cylinder

Technical Field

The utility model relates to an analysis and detection field especially relates to a gas cylinder autosampler.

Background

The existing sampling analysis mode is complex and needs manual auxiliary operation, the traditional method is to manually collect samples for many times in a short time according to actual requirements, then to analyze the samples one by one off-line, the sampling process and the sample storage process are very easy to generate errors, and the sampling analysis method is very complicated and difficult in actual operation. In order to improve the accuracy of the experiment as much as possible. Meanwhile, under the condition that a plurality of samples need to be detected, the single detection mode is not suitable for a large amount of detections in factories and the like.

In order to detect the gas, the residual gas needs to be purged every time the gas is detected in order to eliminate the influence of the gas remaining in the previous detection, but the detected gas cannot be guaranteed to be non-toxic and pollution-free and cannot be directly discharged into the air, so secondary treatment needs to be performed after the detection is finished.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gas steel bottle autosampler, when cleaing away the remaining gas of previous detection, the influence that causes when eliminating harmful gas through the filter and discharging.

In order to achieve the above object, the utility model provides an automatic sample injector for gas steel cylinders, which comprises a power supply, a control circuit, an analyzer, a purging port, a selection valve, a filter and a plurality of sample inlets;

the selection valve is provided with a first through interface, a second through interface and a plurality of third through interfaces, the first through interface is connected with the analyzer, and the purging port is connected to a pipeline between the analyzer and the selection valve in a shunting manner; the second communication port is connected with the filter; the number of the sample inlets is consistent with that of the third through ports, and the third through ports are correspondingly connected with the sample inlets one by one;

the power supply supplies power to the control circuit, the control circuit is respectively connected with the computer, the analyzer, the purging port and the selection valve circuit, and the computer drives the selection valve through the control circuit to connect the first communication interface with the second communication interface or connect the first communication interface with any third communication interface.

Further, in the gas cylinder autosampler, the sample inlet is connected to a sample cylinder.

Further, in the gas cylinder autosampler, an air pump is provided between the analyzer and the selector valve.

Further, in the gas cylinder autosampler, the air pump is a vacuum diaphragm pump.

Furthermore, in the gas steel cylinder automatic sample injector, the number of the third through ports on the selector valve is 2-50.

Furthermore, in the automatic sample injector for gas steel cylinders, pipelines connected among the analyzers, the purge ports, the selector valves, the filters and the sample injection ports are glass tubes, plastic tubes, stainless steel tubes or composite material tubes.

Further, in the gas cylinder autosampler, the outer diameter of the tubing was 1/16 ".

Further, in the gas cylinder autosampler, the pipeline is a passivation pipeline.

Further, in the gas cylinder autosampler, the power supply is 24V dc.

Compared with the prior art, the beneficial effects of the utility model are mainly embodied in that: the sampling control is carried out through a multi-position selection valve, and the sampling can be carried out by a 2-50-position sample steel cylinder. The air pump applies negative pressure to the pipeline, and the communicated sample is directly pressed into the analyzer from the sample inlet, so that automatic sample introduction is realized. The sweeping function that the cooperation of sweeping mouth and filter was realized can in time clear away remaining gas to avoid exhaust gas to the harm of environment, still avoid remaining the gas in the pipeline and produce cross contamination with the gas of new appearance, in order to avoid influencing subsequent gas sample and carry out accurate detection. The control circuit can selectively control the sample introduction sequence, the repeated times, the single sample introduction time length, the sweeping and blowing time length, display the current sample introduction state and the like. The whole device has simple and safe structure, can realize full automation of sample introduction, improves the analysis efficiency and provides the reliability of analysis data.

Drawings

FIG. 1 is a schematic diagram of the schematic structure of an automatic sample injector for gas cylinders according to the present invention;

fig. 2 and 3 are schematic views of the external structure of the automatic sample injector for gas steel cylinders according to the present invention.

Wherein: the device comprises a power supply 1, a control circuit 2, an analyzer 3, a purging port 4, a selector valve 5, a first through interface 51, a second through interface 52, a third through interface 53, a filter 6, a sample inlet 7 and a terminal row 8.

Detailed Description

The gas cylinder autosampler of the present invention will now be described in greater detail with reference to the schematic drawings, in which preferred embodiments of the invention are shown, it being understood that those skilled in the art may modify the invention herein described while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected", if any, are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

As shown in fig. 1 to 3, the utility model provides an automatic sample injector for gas steel cylinders, which comprises a power supply 1, a control circuit 2, an analyzer 3, a purging port 4, a selection valve 5, a filter 6 and a plurality of sample inlets 7; the selector valve 5 is provided with a first through port 51, a second through port 52 and a plurality of third through ports 53, the first through port 51 is connected with the analyzer 3, and a purging port 4 is connected to a pipeline between the analyzer 3 and the selector valve 5 in a shunting manner; the second communication port 52 is connected to the filter 6; the number of the sample inlets 7 is the same as that of the third through ports 53, and each third through port 53 is connected with each sample inlet 7 in a one-to-one correspondence manner. The power supply 1 supplies power to the control circuit 2, the control circuit 2 is respectively in circuit connection with the computer, the analyzer 3, the purging port 4 and the selector valve 5 through the terminal strip 8, and the computer drives the selector valve 5 through the control circuit 2 to connect the first communication port 51 with the second communication port 52 or connect the first communication port 51 with any third communication port 53.

Further, as shown in fig. 3, the sample inlet 7 is connected to the sample steel cylinder, and the number of the third through-ports 53 on the selector valve 5 is 2-50, that is, the sample inlet control is performed through the multi-position selector valve 5, and the sample inlet of 2-50 positions can be performed simultaneously.

Further, as shown in fig. 1, a suction pump is provided between the analyzer 3 and the selector valve 5, and the suction pump is a vacuum diaphragm pump. The suction pump is used for applying negative pressure to the pipeline, and the communicated sample is directly pressed into the analyzer 3 from the sample inlet 7, so that excellent sample introduction repeatability is ensured, and the pollution and damage to the suction pump can be avoided. The pipelines connected among the analyzers 3, the purge ports 4, the selector valves 5, the filters 6 and the sample inlets 7 are glass tubes, plastic tubes, stainless steel tubes or composite material tubes, the outer diameter of the pipeline is 1/16 ″, and the pipeline can be a passivation pipeline and used for analyzing components such as sulfide. The passivation pipeline can avoid corrosion and adsorption and is suitable for detecting trace substances of sulfides and oxides.

Meanwhile, as shown in fig. 1 to 3, in the present embodiment, the brand selected for the analyzer 3 includes, but is not limited to, agilent, american thermoelectric, PE, shimadzu, and the like, and the analyzer 3 of each brand can perform the automatic sample injection control in the present embodiment, thereby improving the analysis efficiency. The sample inlet 7 is a plate-penetrating ferrule joint of standard 1/4', the power supply 1 is 24V direct current, a display panel is arranged on the surface of the sample injector, and the current working state of the sample injector is marked on the display panel.

The specific operating conditions are as follows:

1) controlling the selection valve 5 to communicate the first communication port 51 with the second communication port 52, communicating the purging port 4 with the analyzer 3 and the filter 6, so as to conveniently perform purging to remove the gasified part in the initial sample, and eliminating harmful substances in the purged gas by using the filter 6;

2) after purging is finished, a sample steel bottle is externally hung on the sample inlet 7, and a suction pump is controlled to apply negative pressure to a pipeline between the analyzer 3 and the selection valve 5;

3) the selection valve 5 is controlled to connect the first through interface 51 with any one third through interface 53, even if the sample inlet 7 is connected with the analyzer 3, the gas in the sample steel cylinder enters the analyzer 3 under the negative pressure;

4) after the sample introduction is finished, controlling the analyzer 3 to analyze, and sending an analysis result to a computer;

5) after the analysis is finished, the selection valve 5 is controlled to connect the first through port 51 with the second through port 52, purging is performed again, and residual gas is removed through the filter 6 to perform next sample injection inspection.

Wherein, the purging duration, the sample introduction sequence, the repeated sample introduction duration and the balance time can be set and controlled by the computer through the control circuit.

In summary, in the gas cylinder autosampler proposed in this embodiment, the sample injection control is performed by the multi-position selector valve, and the sample can be injected from the 2-position to 50-position sample cylinders. The air pump applies negative pressure to the pipeline, and the communicated sample is directly pressed into the analyzer from the sample inlet, so that automatic sample introduction is realized. The sweeping function that the cooperation of sweeping mouth and filter was realized can in time clear away remaining gas to avoid exhaust gas to the harm of environment, still avoid remaining the gas in the pipeline and produce cross contamination with the gas of new appearance, in order to avoid influencing subsequent gas sample and carry out accurate detection. The control circuit can selectively control the sample introduction sequence, the repeated times, the single sample introduction time length, the sweeping and blowing time length, display the current sample introduction state and the like. The whole device has simple and safe structure, can realize full automation of sample introduction, improves the analysis efficiency and provides the reliability of analysis data.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims

1. An automatic sample injector for gas steel cylinders is characterized by comprising a power supply, a control circuit, an analyzer, a purging port, a selection valve, a filter and a plurality of sample inlets;

2. The gas cylinder autosampler of claim 1, wherein the sample inlet is connected to a sample cylinder.

3. The gas cylinder autosampler of claim 1, wherein a suction pump is provided between said analyzer and said selector valve.

4. The gas cylinder autosampler of claim 3, wherein said suction pump is a vacuum diaphragm pump.

5. The gas cylinder autosampler of claim 1, wherein the number of third ports on said selector valve is 2-50.

6. The gas cylinder autosampler of claim 1, wherein the piping connected between each of the analyzers, purge ports, selector valves, filters and sample ports is a glass tube, plastic tube, stainless steel tube or composite tube.

7. The gas cylinder autosampler of claim 6, wherein the tubing has an outer diameter of 1/16 ".

8. The gas cylinder autosampler of claim 7, wherein the tubing is passivated tubing.

9. The gas cylinder autosampler of claim 1, wherein said power source is 24V dc.