A gas source quick switching device for a chromatograph continuous gas supply system

Abstract

The embodiment of the present invention discloses a gas source rapid switching device for a chromatograph continuous gas supply system, which relates to the field of detection equipment. The switching device includes a housing, a steering connection pipeline and a steering control device. The steering connection pipeline includes at least two movable connection pipes and at least two fixed connection pipes, the fixed connection pipes are radially arranged in the housing, one end of two adjacent fixed connection pipes are connected to each other, a limited step is provided in the middle of the movable connection pipe, one end of the movable connection pipe is inserted into the connection hole, the other end of the movable connection pipe is inserted into the other end of the fixed connection pipe, and a first compression spring is sleeved on the outer peripheral surface of the other end of the movable connection pipe. The gas source rapid switching device for a chromatograph continuous gas supply system of the embodiment of the present invention can ensure the continuous supply of the gas source and does not affect the normal use of the instrument when the gas source is replaced; at the same time, the appropriate gas supply mode can be selected according to the amount of samples to be tested and the type of gas source supply equipment to reduce the detection cost.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of detection equipment, and in particular to a gas source fast switching device for a continuous gas supply system of a chromatograph. Background Art

[0002] Liquid chromatography-tandem mass spectrometry (LC-MS / MS) uses high-purity nitrogen as the reaction gas and carrier gas. Liquid nitrogen tanks, high-purity nitrogen bottles, or nitrogen generators can be selected as the gas source. Liquid nitrogen tanks have a large gas storage capacity and can be used continuously for 5-7 days, but they are expensive. When not in use, the tank absorbs heat, the liquid nitrogen vaporizes, and the pressure of the tank increases. When the safety pressure is reached, the gas will be released and the pressure will be released, resulting in natural loss of gas. Even if it is not used, it will be completely lost naturally after 3-4 weeks. When the number of samples to be tested is large, liquid nitrogen can meet the testing needs; when the number of samples to be tested is small and the test work can be completed in 3-6 hours, the use of liquid nitrogen tanks for gas supply will result in serious gas waste and high gas cost. At this time, it is suitable to use low-priced high-purity nitrogen bottles as the gas source. When a nitrogen generator is used as the gas source, if the nitrogen generator fails during the test, or the nitrogen generator needs to be maintained during a long test cycle, a liquid nitrogen tank or high-purity nitrogen bottle is required as the gas source. However, existing liquid chromatography-tandem mass spectrometers (LC-MS / MS) usually only have one gas supply path for high-purity nitrogen. If other gas sources are needed, the gas path needs to be rearranged, which is a cumbersome and time-consuming process. Summary of the invention

[0003] To this end, an embodiment of the present invention provides a gas source rapid switching device for a chromatograph continuous gas supply system to solve the problem that the existing chromatograph is cumbersome and time-consuming when using multiple gas sources.

[0004] In order to achieve the above-mentioned object, an embodiment of the present invention provides a gas source rapid switching device for a chromatograph continuous gas supply system, and the gas source rapid switching device for a chromatograph continuous gas supply system comprises:

[0005] A shell, wherein the interior of the shell has a cavity, the top of the shell is provided with a mounting opening, and the side wall of the shell is provided with a plurality of connection holes;

[0006] A steering connection pipeline, the steering connection pipeline comprises at least two movable connection pipes and at least two fixed connection pipes, the fixed connection pipes are radially arranged in the housing, one ends of two adjacent fixed connection pipes are connected to each other, a limiting step is provided in the middle of the movable connection pipe, one end of the movable connection pipe is inserted into the connection hole, the other end of the movable connection pipe is inserted into the other end of the fixed connection pipe, and a first compression spring is sleeved on the outer circumferential surface of the other end of the movable connection pipe;

[0007] A steering control device is used to control the rotation of the steering connection pipeline and the disconnection and connection between the movable connection pipe and the connection hole.

[0008] The embodiment of the present invention is also characterized in that the steering control device includes a fixed seat cylinder, a control rod sleeved inside the fixed seat cylinder and at least two pull wires, the fixed seat cylinder is a tubular structure, the fixed seat cylinder can be rotatably inserted into the installation port, the lower end face of the fixed seat cylinder is connected to the tube wall of one end of the fixed connecting tube, a plurality of threading holes are arranged on the side wall of the lower end of the fixed seat cylinder, two guide grooves are symmetrically arranged on the inner wall of the fixed seat cylinder, the lower end of the control rod is provided with two guide protrusions matching the guide grooves, a limiting ring is arranged on the upper end of the control rod, and a second compression spring is sleeved on the outer circumferential surface of the upper end of the control rod, which is abutted between the limiting ring and the upper end face of the fixed seat cylinder; one end of the pull wire is connected to the lower end of the control rod, and the other end of the pull wire is connected to the limiting step after passing through the threading hole.

[0009] The embodiment of the present invention is also characterized in that a blind hole is provided at the bottom of the cavity, a rotating shaft is rotatably inserted into the blind hole, and an upper end of the rotating shaft is connected to the tube wall of one end of the fixed connecting tube.

[0010] The embodiment of the present invention is also characterized in that a sealing ring is embedded on the inner wall of the connecting hole.

[0011] The embodiment of the present invention is also characterized in that a sealing ring is embedded on the inner wall of the other end of the fixed connecting pipe.

[0012] The embodiment of the present invention is also characterized in that the guide groove is L-shaped.

[0013] The embodiment of the present invention is also characterized in that the central angle between two adjacent connecting holes is 30°.

[0014] The embodiment of the present invention is also characterized in that the limiting step is an annular limiting step, and the outer diameter of the limiting step is larger than the outer diameter of the first compression spring and the inner diameter of the connecting hole.

[0015] The embodiments of the present invention have the following advantages: the gas source rapid switching device of the chromatograph continuous gas supply system of the embodiments of the present invention is suitable for rapid switching of the gas source of the gas supply systems of various chromatographic instruments such as liquid chromatography-tandem mass spectrometer (LC-MS / MS), gas chromatograph (GC), and inductively coupled plasma mass spectrometer (ICP-MS); it can ensure the continuous supply of the gas source and will not affect the normal use of the instrument when the gas source is replaced; at the same time, the appropriate gas supply mode can be selected according to the amount of samples to be tested and the type of gas source supply equipment to reduce the detection cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a gas source rapid switching device for a chromatograph continuous gas supply system provided in Example 1 of the present invention;

[0019] Figure 2 A schematic diagram of the three-dimensional structure of a housing provided in Example 1 of the present invention;

[0020] Figure 3 A schematic diagram of the side cross-sectional structure of the gas source quick switching device of the chromatograph continuous gas supply system provided in Example 1 of the present invention, in which the pull rope is in a relaxed state;

[0021] Figure 4 A schematic diagram of the side cross-sectional structure of the gas source quick switching device of the chromatograph continuous gas supply system provided in Example 1 of the present invention, in which the pull rope is in a tight state;

[0022] Figure 5 A schematic diagram of the connection between the fixed connecting pipe and the fixed seat cylinder provided in Example 1 of the present invention;

[0023] Figure 6 A schematic diagram of a side cross-sectional structure of a fixed seat cylinder provided in Example 1 of the present invention;

[0024] Figure 7 A schematic diagram of the structure of a gas source fast switching device for a chromatograph continuous gas supply system when the gas outlet pipe is connected to the second gas inlet pipe provided in Example 1 of the present invention;

[0025] Figure 8 A schematic diagram of the structure of a gas source fast switching device for a chromatograph continuous gas supply system when the gas outlet pipe is connected to the first gas inlet pipe provided in Example 1 of the present invention;

[0026] Fig. 9 A schematic diagram of the three-dimensional structure of a gas source rapid switching device for a chromatograph continuous gas supply system provided in Example 2 of the present invention;

[0027] Fig.10 A schematic diagram of the structure of a steering control device provided in Example 2 of the present invention;

[0028] Fig.11 A schematic diagram of the structure of a gas source fast switching device for a chromatograph continuous gas supply system when the gas outlet pipe provided in Example 2 of the present invention is connected to the first gas inlet pipe and the fourth gas inlet pipe respectively;

[0029] Fig.12 A schematic diagram of the structure of a gas source rapid switching device for a chromatograph continuous gas supply system when the gas outlet pipe provided in Example 2 of the present invention is connected to the first gas inlet pipe and the third gas inlet pipe respectively;

[0030] Fig.13 A schematic diagram of the structure of a gas source rapid switching device for a chromatograph continuous gas supply system when the gas outlet pipe provided in Example 2 of the present invention is connected to the first gas inlet pipe, the second gas inlet pipe, and the fourth gas inlet pipe respectively;

[0031] Fig.14 A schematic diagram of the structure of a gas source rapid switching device for a chromatograph continuous gas supply system when the gas outlet pipe provided in Example 2 of the present invention is connected to the first gas inlet pipe, the second gas inlet pipe, and the third gas inlet pipe respectively;

[0032] Fig.15 A schematic diagram of the three-dimensional structure of a gas source rapid switching device for a chromatograph continuous gas supply system provided in Example 3 of the present invention;

[0033] Explanation of the reference numerals: 10, housing; 20, steering connecting pipeline; 30, steering control device; 40, exhaust pipe; 50, first intake pipe; 60, second intake pipe; 70, third intake pipe; 80, fourth intake pipe; 11, mounting port; 12, connecting hole; 13, blind hole; 14, rotating shaft; 15, sealing ring; 21, movable connecting pipe; 22, fixed connecting pipe; 31, fixed seat tube; 32, control rod; 33, pull wire; 41, air valve; 211, limiting step; 221, first compression spring; 311, threading hole; 312, guide groove; 321, guide protrusion; 322, limiting ring; 323, second compression spring; 42, electronic pressure gauge; 43, notch; 44, indicator line. DETAILED DESCRIPTION

[0034] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1

[0036] like Figure 1 , 3 As shown in , 5 , the gas source quick switching device of the chromatograph continuous gas supply system includes a housing 10 , a steering connecting pipeline 20 and a steering control device 30 .

[0037] like Figure 2 As shown, the shell 10 has a cavity inside, a mounting port 11 is provided on the top of the shell 10, and 12 connecting holes 12 are provided on the side wall of the shell 10, but the number of the connecting holes 12 is not limited thereto. A sealing ring 15 is embedded on the inner wall of the connecting hole 12, and the sealing ring 15 is used to seal the gap between the connecting hole 12 and the movable connecting pipe 21. The central angle between two adjacent connecting holes 12 is 30°. A blind hole 13 is provided at the bottom of the cavity, and the axis of the blind hole 13 is in the same straight line as the axis of the mounting port 11.

[0038] like Figure 7 and 8 As shown, in this embodiment, the connection hole 12 at the 12 o'clock needle position is connected to the gas outlet pipe 40, and the end of the gas outlet pipe 40 away from the housing 10 is connected to the chromatograph. The gas outlet pipe 40 is provided with a gas valve 41 for controlling the gas volume. The gas valve 41 can be a nitrogen valve or a hydrogen valve, which is specifically determined according to the type of the chromatograph and the gas source. The connection hole 12 at the 4 o'clock needle position is connected to the first gas inlet pipe 50, and the connection hole 12 at the 8 o'clock needle position is connected to the second gas inlet pipe 60. The first gas inlet pipe 50 and the second gas inlet pipe 60 are respectively connected to different gas sources, and the remaining connection holes 12 are blocked with plugs to prevent gas leakage.

[0039] like Figure 5As shown, the steering connection pipeline 20 is used to connect the air outlet pipe 40 with the air inlet pipe. In this embodiment, the steering connection pipeline 20 includes two movable connection pipes 21 and two fixed connection pipes 22. The fixed connection pipes 22 are radially arranged in the housing 10. One ends of two adjacent fixed connection pipes 22 are connected to each other. The angle between the two fixed connection pipes 22 is 120°. A limiting step 211 is provided in the middle of the movable connection pipe 21. The limiting step 211 is an annular limiting step. The outer diameter of the limiting step 211 is larger than the outer diameter of the first compression spring 221 and the inner diameter of the air inlet hole. One end of the movable connection pipe 21 is inserted into the connection hole 12. Due to the insertion of the movable connection pipe 21, the sealing ring 15 is squeezed to prevent gas from leaking from the gap between the movable connection pipe 21 and the connection hole 12. The other end of the movable connection tube 21 is inserted into the other end of the fixed connection tube 22. Similarly, a sealing ring 15 is also embedded on the inner wall of the other end of the fixed connection tube 22. When the other end of the movable connection tube 21 is inserted, the sealing ring 15 is squeezed, thereby blocking the gap between the fixed connection tube 22 and the movable connection tube 21 to prevent gas leakage. The first compression spring 221 is sleeved on the outer circumferential surface of the other end of the movable connection tube 21. The two ends of the first compression spring 221 respectively abut against one side of the limiting step 211 and the end of the other end of the fixed connection tube 22. The first compression spring 221 is usually in a compressed state. The elastic force generated by the first compression spring 221 causes one end of the movable connection tube 21 to be inserted into the connection hole 12, so that the movable connection tube 21 will not be separated from the connection hole 12.

[0040] like Figure 3 , 4As shown in FIGS. 6 and 7 , the steering control device 30 is used to control the rotation of the steering connection pipeline 20 and the disconnection and connection between the movable connection pipe 21 and the air inlet. The steering control device 30 includes a fixed seat tube 31, a control rod 32 and two pull wires 33. Of course, the number of pull wires 33 is not limited thereto, and is specifically determined according to the number of movable connection pipes 21. The fixed seat tube 31 is a tubular structure, and the fixed seat tube 31 can be rotatably inserted into the installation port 11. The lower end surface of the fixed seat tube 31 is connected to the pipe wall at one end of the fixed connection pipe 22. By rotating the fixed seat tube 31, the steering connection pipeline 20 can be driven to rotate axially together. A plurality of threading holes 311 are provided on the side wall of the lower end of the fixed seat tube 31, and two guide grooves 312 are symmetrically provided on the inner wall of the fixed seat tube 31. The guide grooves 312 are L-shaped. The control rod 32 is sleeved inside the fixed seat tube 31. The control rod 32 is coaxially arranged with the fixed seat tube 31. Two guide protrusions 321 are symmetrically arranged at the lower end of the control rod 32. The guide protrusions 321 cooperate with the guide grooves 312 to limit the movement trajectory of the control rod 32 in the fixed seat tube 31. When the guide protrusions 321 are at the bottom of the guide grooves 312, the control rod 32 can rotate a certain angle along its own axis; when the guide protrusions 321 are at the upper part of the guide grooves 312, the control rod 32 can move up and down along its own axis. A limit ring 322 is arranged on the upper end of the control rod 32. A second compression spring 323 is sleeved on the outer circumference of the upper end of the control rod 32. The upper end of the second compression spring 323 abuts against the lower end surface of the limit ring 322, and the lower end of the second compression spring 323 abuts against the upper end surface of the fixed seat tube 31. One end of the pull wire 33 is connected to the lower end of the control rod 32, and the other end of the pull wire 33 passes through the threading hole 311 and is connected to the limit step 211. Furthermore, in order to make the fixed seat cylinder 31 and the steering connection pipe 20 rotate more smoothly, a rotating shaft 14 is rotatably inserted into the blind hole 13, and the upper end of the rotating shaft 14 is welded to the pipe wall of one end of the fixed connection pipe 22 or formed integrally.

[0041] like Figure 3 and 4As shown, during the use of the quick switching device, the guide protrusion 321 of the control rod 32 is always at the lower part of the guide groove 312. At this time, the pull rope is in a relaxed state, and one end of the movable connecting tube 21 is inserted into the connecting hole 12. The movable connecting tube 21 will not be separated from the connecting hole 12 under the elastic force of the first compression spring 221. When it is necessary to switch the air source, the control rod 32 is rotated clockwise to make the guide protrusion 321 enter the upper part of the guide groove 312. At this time, under the elastic force of the second compression spring 323, the control rod 32 moves upward. Under the action of the second compression spring 323, the pull rope is in a taut state, the first compression spring 221 is further compressed, and one end of the movable connecting pipe 21 is pulled out from the connecting hole 12. Then, the fixed seat cylinder 31 is rotated to make the steering connecting pipe 20 rotate to a predetermined angle, and then the control rod 32 is pressed downward to make the control rod 32 move downward. At this time, the pull rope is in a relaxed state. Under the elastic force of the first compression spring 221, one end of the movable connecting pipe 21 is inserted into the connecting hole 12, and ensure that the movable connecting pipe 21 will not be separated from the connecting hole 12. Then, the control rod 32 is rotated counterclockwise to make the guide protrusion 321 enter the lower part of the guide groove 312. At this time, due to the cooperation between the guide protrusion 321 and the guide groove 312, the control rod 32 cannot move upward.

[0042] Liquid chromatography-tandem mass spectrometer (LC-MS / MS) uses high-purity nitrogen as reaction gas and carrier gas, and liquid nitrogen tanks and / or high-pressure nitrogen bottles can be selected as gas supply sources. When in use, the first air inlet pipe 50 is connected to the high-pressure nitrogen bottle, and the second air inlet pipe 60 is connected to the liquid nitrogen tank. When the number of test samples is large, the use of liquid nitrogen tanks for gas supply can meet the test needs, and can save gas and test costs; when the number of test samples is small and the test work can be completed in 3-6 hours, the use of liquid nitrogen tanks for gas supply will result in serious gas waste and high gas costs. Therefore, it is necessary to close the gas valve 41 of the liquid nitrogen tank, turn the steering connection pipeline 20 clockwise by 120°, connect the air outlet pipe 40 to the first air inlet pipe 50, and use a relatively low-priced high-pressure nitrogen bottle as the gas source. By using the gas source rapid switching device of the chromatograph continuous gas supply system, the continuous supply of the gas source can be guaranteed, and the normal use of the instrument will not be affected when the gas source is replaced; at the same time, according to the amount of samples to be tested and the type of gas source supply equipment, a suitable gas supply mode can be selected to reduce the test cost.

[0043] Example 2

[0044] like Fig. 9 and 10As shown, this embodiment is based on embodiment 1, and the difference between this embodiment and embodiment 1 is that the steering connecting pipeline 20 in this embodiment includes seven movable connecting tubes 21 and seven fixed connecting tubes 22. By increasing the number of movable connecting tubes 21 and fixed connecting tubes 22, the chromatograph can use more types of gas sources and provide multiple gas supply modes to reduce the detection cost. In this embodiment, the connecting hole 12 at the four-o'clock needle position is connected to the first air inlet pipe 50, the connecting hole 12 at the eight-o'clock needle position is connected to the second air inlet pipe 60, the connecting hole 12 at the seven-o'clock needle position is connected to the third air inlet pipe 70, and the connecting hole 12 at the five-o'clock needle position is connected to the fourth air inlet pipe 80, wherein the first air inlet pipe 50 and the fourth air inlet pipe 80 are respectively connected to the high-pressure nitrogen cylinder, the second air inlet pipe 60 is connected to the liquid nitrogen tank, and the third air inlet pipe 70 is connected to the nitrogen generator. Fig.11 As shown in the figure, when the amount of samples to be tested is small, 1-2 bottles of high-pressure nitrogen can be used to supply gas to complete the sample testing and save costs. Fig.12 and 13 As shown, when the number of test samples is large or the instrument needs to run continuously, a liquid nitrogen tank is used as the gas supply source; if during the test, one tank of liquid nitrogen cannot meet the test requirements or the instrument needs to run continuously for a long time, close the gas valve 41 of the liquid nitrogen tank, open the gas valve 41 of the high-pressure nitrogen bottle, and use 1-2 high-pressure nitrogen bottles for temporary gas supply. After the empty liquid nitrogen tank is pulled to the gas supply point, filled with liquid nitrogen and transported back, switch back to the liquid nitrogen tank as the gas supply source; or when the nitrogen generator fails during the test, or the nitrogen generator needs to be maintained during a long test cycle, etc., 1-2 high-purity nitrogen bottles can be temporarily used as the gas supply source. After the nitrogen generator resumes normal gas supply, switch back to the nitrogen generator as the gas supply source. As shown Fig.14 As shown, a nitrogen generator, a liquid nitrogen tank and a high-pressure nitrogen bottle are connected at the same time as gas supply sources. According to the number of test samples, this device is used, and a multi-way connecting pipeline is selected for the gas pipeline, and a gas source that meets the gas supply demand and has low cost is selected.

[0045] Example 3

[0046] Fig.15As shown, this embodiment is based on embodiment 2. The difference between this embodiment and embodiment 2 is that in this embodiment, an electronic pressure gauge 42 is provided on the outlet pipe 40. The electronic pressure gauge 42 is used to measure the pressure in the outlet pipe 40. The electronic pressure gauge 42 is preferably a YBS-C digital pressure gauge. The YBS-C digital pressure gauge has a built-in buzzer. The YBS-C digital pressure gauge can set the minimum pressure value by pressing a button. When the air pressure in the outlet pipe 40 is lower than the preset pressure, the buzzer alarms to remind the user to switch the air supply source to ensure the normal experiment. Further, in order to facilitate the rotation of the control rod 32, a notch 43 is provided on the edge of the limit ring 322. The notch 43 can increase the friction between the limit ring 322 and the hand. In addition, an indicator line 44 corresponding to the fixed connecting pipe 22 is provided on the edge of the upper end surface of the fixed seat cylinder 31. The indicator line 44 and the fixed connecting pipe 22 are in the same plane. When the steering connecting pipeline 20 is rotated, the indicator line 44 can clearly indicate the real-time position of each fixed connecting pipe 22.

[0047] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A gas source rapid switching device for a chromatograph continuous gas supply system, characterized in that: The gas source rapid switching device of the chromatograph continuous gas supply system comprises: A shell, wherein the interior of the shell has a cavity, the top of the shell is provided with a mounting opening, and the side wall of the shell is provided with a plurality of connection holes; A steering connection pipeline, the steering connection pipeline comprises at least two movable connection pipes and at least two fixed connection pipes, the fixed connection pipes are radially arranged in the housing, one ends of two adjacent fixed connection pipes are connected to each other, a limiting step is provided in the middle of the movable connection pipe, one end of the movable connection pipe is inserted into the connection hole, the other end of the movable connection pipe is inserted into the other end of the fixed connection pipe, and a first compression spring is sleeved on the outer circumferential surface of the other end of the movable connection pipe; A steering control device, the steering control device is used to control the rotation of the steering connection pipeline and the disconnection and connection of the movable connection pipe with the connection hole; The steering control device comprises a fixed seat cylinder, a control rod sleeved inside the fixed seat cylinder and at least two pull wires. The fixed seat cylinder is a tubular structure, and the fixed seat cylinder can be rotatably inserted into the installation opening, and the lower end surface of the fixed seat cylinder is connected to the tube wall of one end of the fixed connecting tube, and a plurality of threading holes are arranged on the side wall of the lower end of the fixed seat cylinder, and two guide grooves are symmetrically arranged on the inner wall of the fixed seat cylinder, and the lower end of the control rod is provided with two guide protrusions matching the guide grooves. A limiting ring is arranged on the upper end of the control rod, and a second compression spring is sleeved on the outer circumferential surface of the upper end of the control rod, which abuts against the limiting ring and the upper end surface of the fixed seat cylinder; one end of the pull wire is connected to the lower end of the control rod, and the other end of the pull wire is connected to the limiting step after passing through the threading hole; The control rod is sleeved inside the fixed seat tube, and the control rod and the fixed seat tube are coaxially arranged.

2. The gas source rapid switching device for the chromatograph continuous gas supply system according to claim 1, characterized in that: A blind hole is arranged at the bottom of the cavity, a rotating shaft is rotatably inserted into the blind hole, and the upper end of the rotating shaft is connected to the tube wall of one end of the fixed connecting tube.

3. The gas source rapid switching device for the chromatograph continuous gas supply system according to claim 1 or 2, characterized in that: A sealing ring is embedded on the inner wall of the connecting hole.

4. The gas source rapid switching device for the chromatograph continuous gas supply system according to claim 3, characterized in that: A sealing ring is embedded on the inner wall of the other end of the fixed connecting pipe.

5. The gas source rapid switching device for the chromatograph continuous gas supply system according to claim 4 or 2, characterized in that: The guide groove is L-shaped.

6. The gas source rapid switching device for the chromatograph continuous gas supply system according to claim 5, characterized in that: The central angle between two adjacent connecting holes is 30°.

7. The gas source rapid switching device for the chromatograph continuous gas supply system according to claim 4 or 6, characterized in that: The limiting step is an annular limiting step, and the outer diameter of the limiting step is larger than the outer diameter of the first compression spring and the inner diameter of the connecting hole.

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