Gas chromatography carrier gas supply device

Abstract

The utility model relates to a gas chromatography carrier gas supply device which comprises a movable carrier, two carrier gas storage tanks, a first pipeline, a second pipeline and a carrier gas output main pipe, the two carrier gas storage tanks are arranged on the movable carrier, one end of the first pipeline is connected with a gas outlet of one carrier gas storage tank, and the other end of the first pipeline is connected with a gas outlet of the other carrier gas storage tank. One end of the second pipeline is connected with a gas outlet of the other carrier gas storage tank, the other ends of the first pipeline and the second pipeline are respectively connected with one end of a carrier gas output main pipe, and the first pipeline and the second pipeline are respectively provided with a first pressure regulating valve and a second pressure regulating valve; a first stop valve and a second stop valve are respectively arranged at the other ends of the first pipeline and the second pipeline, a third pressure regulating valve is arranged on the carrier gas output main pipe, and the set pressure of the first pressure regulating valve is higher than that of the third pressure regulating valve. The device has the advantages that the skid-mounted structure is more flexible to use, and carrier gas can be used up to the maximum extent; gas supply is stable, and continuous and normal work of chromatography is guaranteed; the method is easy to implement and high in operability.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas metering industry, in particular to a gas chromatography carrier gas supply device. Background Art

[0002] In gas chromatography, the mobile phase is a gas, which is called a carrier gas. The function of the carrier gas is to transport, assist the sample to vaporize at the injection port, and transport the sample to the chromatographic column for separation, and finally transport the sample to the detector for detection. For the carrier gas supply device of the gas chromatography, common gas supply methods include single gas supply and one-for-one (multiple) backup gas supply. In contrast, the single gas supply only realizes the function of gas supply, but after replacing the carrier gas, the chromatograph needs to be shut down and the carrier gas needs to be replaced. During the replacement, the gas chromatograph stops working. Stopping the chromatograph, replacing the carrier gas, and restarting the chromatograph to run steadily may affect the metering. At the same time, the single gas supply design cannot guarantee that the carrier gas in the gas cylinder is used up. One-for-one (multiple) backup gas supply realizes the continuous operation of the chromatograph, but there is also a phenomenon that the carrier gas cannot be completely used up. At the same time, for the existing patents for continuous gas supply devices, only continuous gas supply is considered, and the maximum use of carrier gas is not considered. In addition, the old-fashioned method does not have an integrated design. Before use, multiple components need to be carried, and transportation and use are not flexible.

[0003] Based on this, it is necessary to develop a gas chromatography carrier gas supply device that can be flexibly moved and can effectively and continuously supply gas. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a gas chromatography carrier gas supply device, which effectively overcomes the defects of the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A gas chromatography carrier gas supply device comprises a mobile carrier, two carrier gas storage tanks, a first pipeline, a second pipeline and a carrier gas output main pipe, the two carrier gas storage tanks are mounted on the mobile carrier, one end of the first pipeline is detachably connected to the gas outlet of one of the carrier gas storage tanks, one end of the second pipeline is detachably connected to the gas outlet of the other carrier gas storage tank, the other ends of the first pipeline and the second pipeline are respectively connected to one end of the carrier gas output main pipe, a first pressure regulating valve and a second pressure regulating valve are respectively provided on the first pipeline and the second pipeline, a first stop valve and a second stop valve are respectively provided on the other ends of the first pipeline and the second pipeline, a third pressure regulating valve is provided on the carrier gas output main pipe, and a set pressure of the first pressure regulating valve is higher than a set pressure of the third pressure regulating valve.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the mobile carrier includes a base, an armrest and a mounting bracket, the armrest is arranged on one side of the upper end of the base, the mounting bracket is installed on the upper end of the base, a plurality of walking wheels are provided at the lower end of the base, the two carrier gas storage tanks are installed in the mounting bracket, and the carrier gas output main pipe is arranged at the upper end of the mounting bracket.

[0009] Furthermore, a lifting device is provided at the upper end of the base, and the mounting bracket is installed at the upper end of the lifting device.

[0010] Furthermore, the lifting device comprises a mounting platform and a hydraulic jack, and the mounting platform is mounted on the upper end of the hydraulic jack.

[0011] Furthermore, the first pressure regulating valve, the second pressure regulating valve and the third pressure regulating valve are all pressure regulating valves with a check function.

[0012] Furthermore, a first pressure gauge is provided on the first pipeline corresponding to the pipe section between the first pressure regulating valve and the first stop valve, and a second pressure gauge is provided on the second pipeline corresponding to the pipe section between the second pressure regulating valve and the second stop valve.

[0013] Furthermore, a third pressure gauge is provided on the carrier gas output main pipe at the rear corresponding to the gas flow direction of the third pressure regulating valve.

[0014] Furthermore, one end of the first pipeline and the second pipeline are respectively provided with a pipeline quick connector.

[0015] Furthermore, the gas outlets of the above-mentioned carrier gas storage tanks are respectively provided with switch valves.

[0016] Furthermore, the other end of the carrier gas output main pipe is connected to a bendable explosion-proof gas pipe.

[0017] The beneficial effects of the utility model are: the structural design is simple and reasonable, the whole can be moved and transported, the skid-mounted structure is more flexible to use, and at the same time, it can ensure that the carrier gas is used up to the maximum extent; and the gas supply is stable to ensure the continuous and normal operation of the chromatograph; it is easy to implement and has strong operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the gas chromatography carrier gas supply device of the utility model without the pipeline;

[0019] Figure 2 It is a schematic diagram of the structure of the gas circuit in the gas chromatography carrier gas supply device of the utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Carrier gas storage tank; 2. First pipeline; 3. Second pipeline; 4. Carrier gas output main pipe; 5. First pressure regulating valve; 6. Second pressure regulating valve; 7. First stop valve; 8. Second stop valve; 9. Third pressure regulating valve; 11. Switch valve; 21. First pressure gauge; 31. Second pressure gauge; 41. Third pressure gauge; 101. Base; 102. Handrail; 103. Mounting bracket; 104. Travel wheel; 105. Lifting device; 1051. Mounting table; 1052. Hydraulic jack. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] Example: Figure 1 and 2 As shown, the gas chromatography carrier gas supply device of this embodiment includes a mobile carrier, two carrier gas storage tanks 1, a first pipeline 2, a second pipeline 3 and a carrier gas output main pipe 4, the two above-mentioned carrier gas storage tanks 1 are installed on the above-mentioned mobile carrier, one end of the above-mentioned first pipeline 2 is detachably connected to the gas outlet of one of the above-mentioned carrier gas storage tanks 1, one end of the above-mentioned second pipeline 3 is detachably connected to the gas outlet of the other above-mentioned carrier gas storage tank 1, the other ends of the above-mentioned first pipeline 2 and the second pipeline 3 are respectively connected to one end of the above-mentioned carrier gas output main pipe 4, the first pipeline 2 and the second pipeline 3 are respectively provided with a first pressure regulating valve 5 and a second pressure regulating valve 6, the other ends of the above-mentioned first pipeline 2 and the second pipeline 3 are respectively provided with a first stop valve 7 and a second stop valve 8, the above-mentioned carrier gas output main pipe 4 is provided with a third pressure regulating valve 9, and the set pressure of the above-mentioned first pressure regulating valve 5 is higher than the set pressure of the above-mentioned third pressure regulating valve 9.

[0024] The gas chromatography carrier gas supply device of this embodiment can be flexibly transported to the target position by using a mobile carrier during use. Then, after installing various components and pipelines, the other end of the carrier gas output main pipe 4 is connected to the gas supply pipeline of the gas chromatograph. When in use, all valves are closed in advance, and then one of the carrier gas storage tanks 1 (represented by A in the figure) is opened for gas supply; the pressure is adjusted to 0.2MPa greater than the carrier gas pressure required by the gas chromatography by operating the first pressure regulating valve 5, and then the first stop valve 7 is opened; next, another carrier gas storage tank 1 (represented by B in the figure) is opened for gas supply; the pressure is adjusted to the carrier gas pressure required by the gas chromatography by operating the second pressure regulating valve 6; then, the second stop valve 8 is opened; finally, the pressure is adjusted to the carrier gas pressure required by the gas chromatography by operating the third pressure regulating valve 9. Since the set pressure of the first pressure regulating valve 5 is higher than the set pressure of the third pressure regulating valve 9, in the actual gas supply process, the regulating pressures of the first pressure regulating valve 5 and the second pressure regulating valve 6 are inconsistent, and since the pressure set by the first pressure regulating valve 5 is higher than the pressure set by the second pressure regulating valve 6, the carrier gas storage tank (A tank) and the carrier gas storage tank (B tank) are consumed first, and it can be ensured that the carrier gas in the carrier gas storage tank (A tank) is consumed to the maximum extent before the pressure of the carrier gas storage tank (B tank) is consumed. At the same time, after it is found that the pressure in the A tank is completely consumed, the A tank can be directly replaced, and then the third pressure regulating valve 9 is adjusted to a pressure greater than 0.2MPa required by the gas chromatography through the pressure regulating valve, and then the new carrier gas is replaced and adjusted to the pressure required by the gas chromatography. This alternating replacement not only ensures that the carrier gas is used up to the maximum extent, but also ensures that the chromatography works continuously, and is easy to implement and highly operable.

[0025] As a preferred embodiment, the mobile carrier includes a base 101, an armrest 102 and a mounting bracket 103, the armrest 102 is arranged on one side of the upper end of the base 101, the mounting bracket 103 is installed on the upper end of the base 101, a plurality of walking wheels 104 are provided at the lower end of the base 101, the two carrier gas storage tanks 1 are installed in the mounting bracket 103, and the carrier gas output main pipe 4 is arranged at the upper end of the mounting bracket 103.

[0026] In the above embodiment, the base 101 is pushed by the handrail 102, so that the running wheels 104 can move along the ground, and can be quickly moved to the target location, which is flexible and convenient to operate. At the same time, the design of the mounting bracket 103 is easy to arrange the carrier gas storage tank and pipelines, and the structure is more compact and the pipe layout is regular.

[0027] In this embodiment, a lifting device 105 is provided at the upper end of the base 101, and the mounting bracket 103 is mounted at the upper end of the lifting device 105. The height of the pipeline at the upper end of the mounting bracket 103 can be adjusted by the lifting device 105, so that the carrier gas output main pipe 4 is at a height that matches the gas supply pipeline of the gas chromatograph, which is convenient for pipe connection.

[0028] In this embodiment, the lifting device 105 includes a mounting platform 1051 and a hydraulic jack 1052 , and the mounting platform 1051 is mounted on the upper end of the hydraulic jack 1052 .

[0029] In this embodiment, the first pressure regulating valve 5, the second pressure regulating valve 6 and the third pressure regulating valve 9 are all pressure regulating valves with a check function, which can prevent the carrier gas from flowing back.

[0030] As a preferred embodiment, a first pressure gauge 21 is provided on the first pipeline 2 corresponding to the pipe section between the first pressure regulating valve 5 and the first stop valve 7, and a second pressure gauge 31 is provided on the second pipeline 3 corresponding to the pipe section between the second pressure regulating valve 6 and the second stop valve 8.

[0031] In the above embodiment, the first pressure gauge 21 and the second pressure gauge 31 provide real-time feedback of the pressure information of their respective pipelines, so as to adjust the pipeline pressure according to the pressure information.

[0032] In this embodiment, a third pressure gauge 41 is provided on the carrier gas output main pipe 4 at the rear of the gas flow direction of the third pressure regulating valve 9. The third pressure gauge 41 feeds back pipeline pressure information in real time, so as to facilitate operation and adjustment of the third pressure regulating valve 9 according to the pressure information.

[0033] In this embodiment, one end of the first pipeline 2 and the second pipeline 3 are respectively provided with pipeline quick connectors, which facilitate quick connection with the gas outlet of the carrier gas storage tank 1, and the disassembly and assembly of the carrier gas storage tank 1 is relatively fast and efficient.

[0034] In this embodiment, the gas outlets of the above-mentioned carrier gas storage tanks 1 are respectively provided with switch valves 11. When the carrier gas storage tanks 1 are replaced, the switch valves 11 are operated to open or close, making disassembly and assembly safer.

[0035] In this embodiment, a bendable explosion-proof gas pipe is connected to the other end of the carrier gas output main pipe 4. The explosion-proof gas pipe is connected to the gas chromatograph docking line, and can be flexibly bent as needed to facilitate pipeline docking.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0041] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A gas chromatography carrier gas supply device, characterized in that: The invention comprises a mobile carrier, two carrier gas storage tanks (1), a first pipeline (2), a second pipeline (3) and a carrier gas output main pipe (4), wherein the two carrier gas storage tanks (1) are mounted on the mobile carrier, one end of the first pipeline (2) is detachably connected to the gas outlet of one of the carrier gas storage tanks (1), one end of the second pipeline (3) is detachably connected to the gas outlet of the other carrier gas storage tank (1), the other ends of the first pipeline (2) and the second pipeline (3) are respectively connected to one end of the carrier gas output main pipe (4), the first pipeline (2) and the second pipeline (3) are respectively provided with a first pressure regulating valve (5) and a second pressure regulating valve (6), the other ends of the first pipeline (2) and the second pipeline (3) are respectively provided with a first stop valve (7) and a second stop valve (8), the carrier gas output main pipe (4) is provided with a third pressure regulating valve (9), and the set pressure of the first pressure regulating valve (5) is higher than the set pressure of the third pressure regulating valve (9).

2. A gas chromatography carrier gas supply device according to claim 1, characterized in that: The mobile carrier comprises a base (101), an armrest (102) and a mounting bracket (103), wherein the armrest (102) is arranged on one side of the upper end of the base (101), the mounting bracket (103) is installed on the upper end of the base (101), a plurality of running wheels (104) are provided at the lower end of the base (101), the two carrier gas storage tanks (1) are installed in the mounting bracket (103), and the carrier gas output main pipe (4) is arranged at the upper end of the mounting bracket (103).

3. A gas chromatography carrier gas supply device according to claim 2, characterized in that: A lifting device (105) is provided at the upper end of the base (101), and the mounting bracket (103) is mounted on the upper end of the lifting device (105).

4. A gas chromatography carrier gas supply device according to claim 3, characterized in that: The lifting device (105) comprises a mounting platform (1051) and a hydraulic jack (1052), wherein the mounting platform (1051) is mounted on the upper end of the hydraulic jack (1052).

5. A gas chromatography carrier gas supply device according to claim 1, characterized in that: The first pressure regulating valve (5), the second pressure regulating valve (6) and the third pressure regulating valve (9) are all pressure regulating valves with a check function.

6. A gas chromatography carrier gas supply device according to claim 5, characterized in that: A first pressure gauge (21) is provided on the first pipeline (2) at a pipe section corresponding to the first pressure regulating valve (5) and the first stop valve (7), and a second pressure gauge (31) is provided on the second pipeline (3) at a pipe section corresponding to the second pressure regulating valve (6) and the second stop valve (8).

7. A gas chromatography carrier gas supply device according to claim 6, characterized in that: A third pressure gauge (41) is provided on the carrier gas output main pipe (4) at the rear of the gas flow direction corresponding to the third pressure regulating valve (9).

8. A gas chromatography carrier gas supply device according to claim 1, characterized in that: One end of the first pipeline (2) and the second pipeline (3) are respectively provided with a pipeline quick connector.

9. A gas chromatography carrier gas supply device according to claim 1, characterized in that: The gas outlets of the carrier gas storage tanks (1) are respectively provided with switch valves (11).

10. A gas chromatography carrier gas supply device according to any one of claims 1 to 9, characterized in that: The other end of the carrier gas output main pipe (4) is connected to a bendable explosion-proof gas pipe.

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