Standard gas quantitative sampling device for gas chromatograph

Abstract

The utility model relates to the technical field of gas chromatographs, and discloses a standard gas quantitative sampling device for a gas chromatograph. By arranging a three-way plug, a first electromagnetic valve, a second electromagnetic valve, a first electromagnetic three-way valve, a second electromagnetic three-way valve and a third electromagnetic three-way valve, connection between pipelines is controlled, and therefore the equipment can suck cleaning liquid from a water tank according to actual conditions and send the cleaning liquid into the corresponding pipelines for cleaning according to actual needs; therefore, the problems of inaccurate experimental data and the like caused by the fact that the interior of the sampling device is polluted by the sample gas can be avoided. In addition, the cleaning process comprises three different cleaning modes, and independent cleaning of the injection inflator component, cleaning of the injection inflator component and the gas carrying pipe and cleaning of the injection inflator component and the gas feeding pipe can be completed. And therefore, the use scene of the equipment is wider, and sewage generated after cleaning is completed is discharged through the first blow-off pipe or the second blow-off pipe.

Description

Technical Field

[0001] The present application relates to the technical field of gas chromatographs, and in particular to a standard gas quantitative sampling device for gas chromatographs. Background Art

[0002] Gas chromatograph refers to a chromatographic analysis instrument that uses gas as the mobile phase. Its principle is mainly to use the differences in the boiling point, polarity and adsorption properties of substances to achieve the separation of mixtures. After the sample to be analyzed is vaporized in the vaporization chamber, it is carried into the chromatographic column by the inert gas (i.e., carrier gas, also called mobile phase). The column contains a liquid or solid stationary phase, and each component in the sample tends to form a distribution or adsorption equilibrium between the mobile phase and the stationary phase. As the carrier gas flows, the sample components are repeatedly distributed or adsorbed / desorbed during movement. The components with a large distribution concentration in the carrier gas flow out of the chromatographic column first, and the components with a large distribution concentration in the stationary phase flow out later.

[0003] The existing gas chromatograph sampling device cannot achieve self-cleaning, which causes the residual gas inside to liquefy and adhere to the inner wall, making the subsequent gas sample easily contaminated after sampling and affecting the final result. Utility Model Content

[0004] In view of the above problems, an embodiment of the present application provides a standard gas quantitative injection device for a gas chromatograph, which can perform its own self-cleaning function, thereby preventing the injection device from being contaminated by the sample.

[0005] According to one aspect of an embodiment of the present application, a standard gas quantitative sampling device for a gas chromatograph is provided. The standard gas quantitative sampling device for a gas chromatograph comprises an injection cylinder component, and an air intake component and an exhaust component respectively connected to the injection cylinder component, the injection cylinder component comprises an air intake pipe and an air outlet pipe, the air intake component comprises a three-way plug, the first port of the three-way plug is connected to the air intake pipe, the second port and the third port are respectively connected to a water tank and a carrier gas pipe through a first solenoid valve and a second solenoid valve, the other end of the carrier gas pipe is connected to a carrier gas device and a first sewage pipe through a first solenoid three-way valve, the outlet pipe is connected to a gas washing pipe and an air supply pipe through a second solenoid three-way valve, and the end of the air supply pipe is connected to a second sewage pipe through a third solenoid three-way valve.

[0006] In some embodiments, the injection cylinder component includes a cylinder body, one end of the cylinder body is connected to the air inlet pipe and the air outlet pipe respectively, and the other end is provided with a support plate, a connecting rod is horizontally arranged in the cylinder body, one end of the connecting rod is connected to the suction plate, the outer periphery of the suction plate is provided with a sealing plug, the other end of the connecting rod passes through and extends to the outside of the support plate and is connected to a support plate, and a telescopic component is commonly connected between the support plate and the support plate.

[0007] In some embodiments, the telescopic component includes a plurality of electric telescopic rods, one end of each electric telescopic rod is fixedly connected to the support plate and the other end of each electric telescopic rod is fixedly connected to the support plate.

[0008] In some embodiments, the plurality of electric telescopic rods are symmetrically arranged at equal intervals along the axial direction of the connecting rod.

[0009] In some embodiments, a scale plate is included, and a fixed platform is connected at an angle to the side of the support plate facing away from the cylinder body. A scale plate is fixed to the fixed platform. The scale plate is arranged parallel to the connecting rod, and a length mark is arranged on the top side of the scale plate.

[0010] In some embodiments, a pointer component is fixed to the support plate, and the needle of the pointer component extends to the top of the scale plate.

[0011] In some embodiments, a sewage drain pool is included, and one end of the first sewage drain pipe away from the first electromagnetic three-way valve and one end of the second electromagnetic three-way valve away from the three electromagnetic three-way valves both extend to the sewage drain pool.

[0012] The beneficial effects of the present application are as follows: in the present application, by setting a three-way plug, the first solenoid valve, the second solenoid valve, the first solenoid three-way valve, the second solenoid three-way valve and the third solenoid three-way valve control the connection between the pipelines, so that the present device can inhale the cleaning liquid from the water tank according to the actual situation and send the cleaning liquid into the corresponding pipeline for cleaning according to the actual needs, thereby avoiding the problem of inaccurate experimental data caused by the internal contamination of the sample gas by the sample gas. And in the present application, the cleaning process includes three different cleaning methods, which can complete the cleaning of the injection cylinder parts alone, the cleaning of the injection cylinder parts + carrier gas pipes and the cleaning of the injection cylinder parts + air supply pipes. The use scenario of the present device is more extensive, and the sewage after cleaning will be discharged through the first sewage pipe or the second sewage pipe.

[0013] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0015] Figure 1 A schematic diagram of the overall structure of a standard gas quantitative sampling device for a gas chromatograph provided in an embodiment of the present application;

[0016] Figure 2 for Figure 1 Enlarged view at A.

[0017] The reference numerals in the specific implementation manner are as follows:

[0018] A standard gas quantitative sampling device 100 for a gas chromatograph, an injection cylinder component 110, an air inlet pipe 111, an air outlet pipe 112, a cylinder body 113, a support plate 114, a connecting rod 115, an air suction plate 116, a sealing plug 116a, a support plate 117, an air inlet component 120, a three-way plug 121, a first solenoid valve 122, a second solenoid valve 123, a water tank 124, a carrier gas pipe 125, a first solenoid three-way valve 125a, a carrier gas device 125b, a first sewage pipe 125c, an exhaust component 130, a gas washing pipe 131, an air supply pipe 132, a second solenoid three-way valve 133, a third solenoid three-way valve 134, a second sewage pipe 134a, a telescopic component 140, a scale plate 150, a fixing table 160, a pointer component 170, and a sewage pool 180. DETAILED DESCRIPTION

[0019] The following will describe in detail the embodiments of the technical solution of the present application in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only used as examples and cannot be used to limit the scope of protection of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned description of the drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0020] Specifically, please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the overall structure of a standard gas quantitative sampling device for a gas chromatograph provided in an embodiment of the present application. Figure 2 for Figure 1Enlarged view at A. The standard gas quantitative sampling device 100 for gas chromatograph includes an injection cylinder component 110, and an air intake component 120 and an exhaust component 130 respectively connected to the injection cylinder component 110. In the embodiment of the present application, the injection cylinder component 110 can be set with reference to the prior art or purchased on the market. The injection cylinder component 110 has the function of pumping and suction. Usually, the injection cylinder component 110 changes the air pressure of its own cavity through the reciprocating motion of its internal piston, so as to quantitatively inhale the sample gas from the air intake component 120, and inject the inhaled sample gas into the gas chromatograph through the exhaust component 130. In the embodiment of the present application, the air intake component 120 is usually connected to the sample gas storage device, and the exhaust component 130 is connected to the gas chromatograph. The injection cylinder component 110 includes an air inlet pipe 111 and an air outlet pipe 112, and the air inlet component 120 includes a three-way plug 121. The first port of the three-way plug 121 is connected to the air inlet pipe 111, and the second port and the third port are connected to the water tank 124 and the carrier gas pipe 125 through the first solenoid valve 122 and the second solenoid valve 123 respectively. The three-way plug 121 can connect the water tank 124 and the carrier gas pipe 125 with the air inlet pipe 111. The first solenoid valve 122 is used to control the on-off of the water tank 124 and the air inlet pipe 111, and the second solenoid valve 123 is used to control the on-off between the carrier gas pipe 125 and the air inlet pipe 111. When the carrier gas pipe 125 is connected to the air inlet pipe 111, the gas sample in the gas sample storage device connected to the carrier gas pipe 125 can enter the injection cylinder. The other end of the carrier gas pipe 125 is connected to the carrier gas device 125b and the first sewage pipe 125c through the first electromagnetic three-way valve 125a. The first sewage pipe 125c is used to discharge sewage when cleaning the carrier gas pipe 125. The outlet pipe 112 is connected to the air washing pipe 131 and the air supply pipe 132 through the second electromagnetic three-way valve 133. The air washing pipe 131 is used to send external air into the injection cylinder or discharge sewage in the injection cylinder. The end of the air supply pipe 132 is connected to the second sewage pipe 134a through the third electromagnetic three-way valve 134. The second sewage pipe 134a is used to discharge sewage in the air supply pipe 132.

[0021] In the specific working process of the embodiment of the present application, when it is necessary to inlet gas to the gas chromatograph, by controlling the opening and closing of each valve body, during the suction process of the injection cylinder component 110, the gas sample enters the three-way plug 121, the air inlet pipe 111 and the injection cylinder from the carrier gas pipe 125 in sequence. At this time, the opening and closing of each valve body is changed, and the injection cylinder component 110 is pushed, and the gas sample in the injection cylinder component 110 will be sent to the gas chromatograph after passing through the outlet pipe 112 and the air delivery pipe 132 in sequence. When it is necessary to clean the injection cylinder, the first solenoid valve 122 is controlled to open and the second solenoid valve 123 is closed. At this time, during the suction process of the injection cylinder component 110, the cleaning liquid in the water tank 124 is sucked into the injection cylinder. At this time, the cleaning method can be selected according to the actual situation; 1. When it is necessary to clean the air supply pipe 132, close the remaining valve bodies and open the third electromagnetic three-way valve 134. During the pushing process of the injection cylinder component 110, the cleaning liquid enters the air outlet pipe 112 and the air supply pipe 132 in sequence, and flows out from the second sewage pipe 134a after the cleaning is completed. 2. When it is necessary to clean the carrier gas pipe 125, close the remaining valves and open the second electromagnetic valve 123 and the first electromagnetic three-way valve 125a. At this time, during the pushing process of the injection cylinder component 110, the cleaning liquid enters the air inlet pipe 111, the three-way plug 121 and the carrier gas pipe 125 in sequence. After the cleaning of the carrier gas pipe 125 is completed, the cleaning liquid enters the first sewage pipe 125c and is discharged. 3. When only the injection cylinder component 110 needs to be cleaned, control the second electromagnetic three-way valve 133 to connect the wash pipe 131 and the outlet pipe 112. At this time, during the pushing process of the injection cylinder component 110, the cleaning liquid will be directly discharged from the wash pipe 131.

[0022] As can be seen from the above, in the embodiment of the present application, by setting the three-way plug 121, the first solenoid valve 122, the second solenoid valve 123, the first solenoid three-way valve 125a, the second solenoid three-way valve 133 and the third solenoid three-way valve 134, the connection between the pipelines is controlled, so that the device can inhale the cleaning liquid from the water tank 124 according to the actual situation and send the cleaning liquid into the corresponding pipeline for cleaning according to the actual needs, thereby avoiding the problem of inaccurate experimental data caused by the internal contamination of the sample gas of the injection device. And in the embodiment of the present application, the cleaning process includes three different cleaning methods, which can complete the cleaning of the injection cylinder component 110 alone, the cleaning of the injection cylinder component 110 + the carrier gas pipe 125, and the cleaning of the injection cylinder component 110 + the air delivery pipe 132. Make the use scenario of the present device more extensive, and the sewage after cleaning will be discharged through the first sewage pipe 125c or the second sewage pipe 134a.

[0023] In some embodiments, the injection cylinder component 110 includes a cylinder body 113, one end of the cylinder body 113 is respectively connected to the air inlet pipe 111 and the air outlet pipe 112, and the other end is provided with a support plate 114. A connecting rod 115 is horizontally arranged in the cylinder body 113, one end of the connecting rod 115 is connected to the suction plate 116, and the outer periphery of the suction plate 116 is provided with a sealing plug 116a. The other end of the connecting rod 115 passes through and extends to the outside of the support plate 114 and is connected to a support plate 117. A telescopic component 140 is commonly connected between the support plate 117 and the support plate 114. The embodiment of the present application proposes a specific setting method for the injection cylinder component 110. Specifically, during the working process, the telescopic component 140 will drive the support plate 117 to move to the side away from the support disk 114 after being extended, and the support plate 117 drives the connecting rod 115 to move horizontally, and the connecting rod 115 further drives the suction disk 116 to slide in the cylinder body 113. At this time, the external gas sample can be sucked in. Conversely, when the telescopic component 140 is retracted, the gas sample can be discharged from the inner cavity of the cylinder body 113 and sent into the gas chromatograph.

[0024] In some embodiments, the telescopic component includes a plurality of electric telescopic rods, one end of which is fixedly connected to the support plate 114 and the other end of which is fixedly connected to the support plate 117. The embodiment of the present application uses electric telescopic rods as the telescopic component, so that the telescopic component has the characteristics of low cost, easy installation and purchase, and convenient operation.

[0025] In some embodiments, multiple electric telescopic rods are symmetrically arranged at equal intervals along the axial direction of the connecting rod 115. In the embodiment of the present application, the symmetrically arranged electric telescopic rods exert force on the support plate 117 more steadily and evenly, making the device more stable during operation.

[0026] In some embodiments, a scale plate 150 is included, and a fixed platform 160 is connected at an angle on one side of the support plate 114 away from the cylinder body 113, and a scale plate 150 is fixed on the fixed platform 160. The scale plate 150 is arranged in parallel with the connecting rod 115, and a length mark is arranged on one side of the top of the scale plate 150. In the embodiment of the present application, through the above arrangement, when the connecting rod 115 drives the suction disc 116 to move, the longer the displacement distance is, the more gas sample is inhaled, and the reading on the scale plate 150 corresponding to the support plate 117 at this time will also be different, so the operator can confirm the amount of gas sample in the inner cavity of the cylinder body by observing the reading on the scale plate 150 corresponding to the support plate 117.

[0027] In some embodiments, a pointer component 170 is fixed to the support plate 117, and the needle of the pointer component 170 extends to the top of the scale plate 150. In the embodiment of the present application, by setting a pointer, the operator can more quickly and conveniently confirm the relative indication of the scale plate 150 at this time through the pointer.

[0028] In some embodiments, a sewage drain pool 180 is included, and one end of the first sewage drain pipe 125c away from the first electromagnetic three-way valve 125a and one end of the second electromagnetic three-way valve 133 away from the three electromagnetic three-way valves are extended to the sewage drain pool 180. In the embodiment of the present application, the sewage drain pool 180 is set to recycle the cleaning liquid after cleaning.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A standard gas quantitative sampling device for gas chromatograph, characterized in that: It includes an injection cylinder component, and an air intake component and an air exhaust component respectively communicated with the injection cylinder component; The injection cylinder component includes an air inlet pipe and an air outlet pipe, the air inlet component includes a three-way plug, the first port of the three-way plug is connected to the air inlet pipe, the second port and the third port are connected to the water tank and the air carrier pipe through the first solenoid valve and the second solenoid valve respectively, and the other end of the air carrier pipe is connected to the air carrier device and the first sewage pipe through the first solenoid three-way valve; The air outlet pipe is connected to an air washing pipe and an air supply pipe through a second electromagnetic three-way valve, and the end of the air supply pipe is connected to a second sewage discharge pipe through a third electromagnetic three-way valve.

2. The standard gas quantitative sampling device for gas chromatograph according to claim 1, characterized in that: The injection cylinder component includes a cylinder body, one end of which is connected to the air inlet pipe and the air outlet pipe respectively, and the other end is provided with a support plate, a connecting rod is transversely arranged in the cylinder body, one end of the connecting rod is connected to an air suction plate, and a sealing plug is provided on the outer periphery of the air suction plate, the other end of the connecting rod passes through and extends to the outer side of the support plate and is connected to a support plate, and a telescopic component is commonly connected between the support plate and the support plate.

3. The standard gas quantitative sampling device for gas chromatograph according to claim 2, characterized in that: The telescopic component includes a plurality of electric telescopic rods, one end of the electric telescopic rod is fixedly connected to the support plate and the other end of the electric telescopic rod is fixedly connected to the support plate.

4. The standard gas quantitative sampling device for gas chromatograph according to claim 3, characterized in that: The plurality of electric telescopic rods are symmetrically arranged at equal intervals along the axial direction of the connecting rod.

5. The standard gas quantitative sampling device for gas chromatograph according to claim 2, characterized in that: It includes a scale plate, a fixed platform is connected to the support plate at an angle on one side away from the cylinder body, a scale plate is fixed on the fixed platform, the scale plate is arranged parallel to the connecting rod, and a length mark is arranged on one side of the top of the scale plate.

6. The standard gas quantitative sampling device for gas chromatograph according to claim 5, characterized in that: A pointer component is fixed to the support plate, and the needle of the pointer component extends to the top of the scale plate.

7. The standard gas quantitative sampling device for gas chromatograph according to claim 1, characterized in that: It comprises a sewage drain pool, wherein one end of the first sewage drain pipe away from the first electromagnetic three-way valve and one end of the second electromagnetic three-way valve away from the three electromagnetic three-way valves both extend to the sewage drain pool.

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