阅读说明：本技术 一种色谱仪连续供气系统气源快速切换装置 (Quick switching device of chromatograph continuous gas supply system air supply ) 是由 蔡洁云 王惠平 孟红明 顾健龙 李锦辉 薛海鸥 于 2019-02-25 设计创作，主要内容包括：本发明实施例公开了一种色谱仪连续供气系统气源快速切换装置,涉及检测设备领域,该切换装置包括壳体、转向连接管路和转向控制装置。转向连接管路包括至少两个活动连接管和至少两个固定连接管,固定连接管呈放射形布置于壳体内,相邻两个固定连接管的一端相互连通,活动连接管的中部设置有限位台阶,活动连接管的一端插入于连接孔,活动连接管的另一端插入于固定连接管的另一端,活动连接管另一端的外周面上套设有第一压缩弹簧。本发明实施例的色谱仪连续供气系统气源快速切换装置既能保证气源的连续供给,在更换气源时不影响仪器的正常使用；同时,可以根据待检样品量和气源供给设备的种类,选择合适供气模式,以降低检测成本。(The embodiment of the invention discloses a gas source quick switching device of a chromatograph continuous gas supply system, which relates to the field of detection equipment. Turn to connecting tube and include two at least swing joint pipes and two at least fixed connection pipes, fixed connection pipe is the radiation and arranges in the casing, two adjacent fixed connection pipe's one end communicates each other, swing joint pipe's middle part is provided with spacing step, swing joint pipe's one end inserts in the connecting hole, swing joint pipe's the other end inserts in fixed connection pipe's the other end, the cover is equipped with first compression spring on the outer peripheral face of the swing joint pipe other end. The gas source quick switching device of the chromatograph continuous gas supply system can ensure the continuous supply of the gas source and does not influence the normal use of the instrument when the gas source is replaced; meanwhile, a proper air supply mode can be selected according to the amount of a sample to be detected and the type of air source supply equipment, so that the detection cost is reduced.)

1. The utility model provides a quick auto-change over device of continuous gas supply system air supply of chromatograph, its characterized in that, the quick auto-change over device of continuous gas supply system air supply of chromatograph includes:

the device comprises a shell, a plurality of connecting holes and a plurality of connecting rods, wherein a cavity is formed in the shell, a mounting hole is formed in the top of the shell, and the side wall of the shell is provided with the connecting holes;

the steering connecting pipeline comprises at least two movable connecting pipes and at least two fixed connecting pipes, the fixed connecting pipes are arranged in the shell in a radial mode, one ends of every two adjacent fixed connecting pipes are mutually communicated, a limiting step is arranged in the middle of each movable connecting pipe, one end of each movable connecting pipe is inserted into the corresponding connecting hole, the other end of each movable connecting pipe is inserted into the other end of the corresponding fixed connecting pipe, and a first compression spring is sleeved on the outer peripheral surface of the other end of each movable connecting pipe;

and the steering control device is used for controlling the rotation of the steering connecting pipeline and the disconnection and communication of the movable connecting pipe and the connecting hole.

2. The fast switching device of the air source of the chromatograph continuous air supply system according to claim 1, wherein the steering control device comprises a fixed base cylinder, a control rod sleeved inside the fixed base cylinder, and at least two pull wires, the fixed base cylinder is of a tubular structure, the fixed base cylinder is rotatably inserted into the installation opening, the lower end surface of the fixed base cylinder is connected with the pipe wall at one end of the fixed connection pipe, the side wall at the lower end of the fixed base cylinder is provided with a plurality of wire through holes, the inner wall of the fixed base cylinder is symmetrically provided with two guide grooves, the lower end of the control rod is provided with two guide protrusions matched with the guide grooves, the upper end of the control rod is provided with a limit ring, and the outer peripheral surface at the upper end of the control rod is sleeved with a second compression spring abutted between the limit ring and the upper end surface of the fixed base cylinder; one end of the pull wire is connected with the lower end of the control rod, and the other end of the pull wire penetrates through the threading hole and then is connected with the limiting step.

3. The fast switching device for the air supply of the continuous air supply system of the chromatograph of claim 2, wherein the bottom of the cavity is provided with a blind hole, a rotating shaft is rotatably inserted into the blind hole, and the upper end of the rotating shaft is connected with the tube wall at one end of the fixed connecting tube.

4. The gas source fast switching device of a chromatograph continuous gas supply system according to claim 2 or 3, wherein a sealing ring is embedded on the inner wall of the connecting hole.

5. The fast gas source switching device for a continuous gas supply system of a chromatograph according to claim 4, wherein a sealing ring is embedded in an inner wall of the other end of the fixed connecting pipe.

6. The gas source fast switching device of the continuous gas supply system of the chromatograph according to claim 5 or 3, wherein the guiding groove is L-shaped.

7. The gas source fast switching device for a continuous gas supply system of a chromatograph according to claim 6, wherein a central angle between two adjacent connecting holes is 30 °.

8. The gas source fast switching device of a chromatograph continuous gas supply system according to claim 5 or 7, wherein the limiting step is an annular limiting step, and an outer diameter of the limiting step is larger than an outer diameter of the first compression spring and an inner diameter of the connecting hole.

Technical Field

The embodiment of the invention relates to the field of detection equipment, in particular to a gas source quick switching device of a chromatograph continuous gas supply system.

Background

Liquid chromatography-tandem mass spectrometry (LC-MS/MS) uses high purity nitrogen as the reactant gas and carrier gas, and a liquid nitrogen tank or a high purity nitrogen cylinder or a nitrogen generator may be selected as the gas supply source. The liquid nitrogen tank has large gas storage capacity and can be continuously used for 5-7 days, but the liquid nitrogen tank is high in price, and when the liquid nitrogen tank is not used, the tank body absorbs heat, the liquid nitrogen is gasified, the pressure of the tank body rises, and when the pressure reaches a safe pressure specified value, the liquid nitrogen tank can be deflated and decompressed, so that natural loss of gas is caused, and even if the liquid nitrogen tank is not used, the natural loss is complete after 3-4 weeks. When the number of samples to be detected is large, the detection requirement can be met by using liquid nitrogen; when the number of the detected samples is small and the detection work can be completed within 3-6 hours, the gas is seriously wasted by using a liquid nitrogen tank for gas supply, the gas supply cost is high, and a high-purity nitrogen bottle with lower price is suitable to be selected as a gas source. When the nitrogen generator is used as the gas supply source, if the nitrogen generator is in failure in the detection process, and the nitrogen generator needs to be maintained in a longer detection period, a liquid nitrogen tank or a high-purity nitrogen bottle is needed to be used as the gas supply source. However, the existing liquid chromatography-tandem mass spectrometer (LC-MS/MS) usually only has a high purity nitrogen gas supply channel, and if the gas supply needs to be replaced by other gas sources, the gas path needs to be rearranged, and the process is complicated and time-consuming.

Disclosure of Invention

Therefore, the embodiment of the invention provides a device for quickly switching gas sources of a continuous gas supply system of a chromatograph, which is used for solving the problems of complexity and time consumption when various gas sources are used in the conventional chromatograph.

In order to achieve the above object, an embodiment of the present invention provides a fast switching apparatus for an air source of a continuous air supply system of a chromatograph, where the fast switching apparatus for an air source of a continuous air supply system of a chromatograph includes:

the device comprises a shell, a plurality of connecting holes and a plurality of connecting rods, wherein a cavity is formed in the shell, a mounting hole is formed in the top of the shell, and the side wall of the shell is provided with the connecting holes;

the steering connecting pipeline comprises at least two movable connecting pipes and at least two fixed connecting pipes, the fixed connecting pipes are arranged in the shell in a radial mode, one ends of every two adjacent fixed connecting pipes are mutually communicated, a limiting step is arranged in the middle of each movable connecting pipe, one end of each movable connecting pipe is inserted into the corresponding connecting hole, the other end of each movable connecting pipe is inserted into the other end of the corresponding fixed connecting pipe, and a first compression spring is sleeved on the outer peripheral surface of the other end of each movable connecting pipe;

and the steering control device is used for controlling the rotation of the steering connecting pipeline and the disconnection and communication of the movable connecting pipe and the connecting hole.

The embodiment of the invention is further characterized in that the steering control device comprises a fixed seat barrel, a control rod sleeved inside the fixed seat barrel and at least two pull wires, wherein the fixed seat barrel is of a tubular structure, the fixed seat barrel is rotatably inserted into the mounting hole, the lower end face of the fixed seat barrel is connected with the pipe wall at one end of the fixed connecting pipe, a plurality of threading holes are formed in the side wall at the lower end of the fixed seat barrel, two guide grooves are symmetrically formed in the inner wall of the fixed seat barrel, two guide bulges matched with the guide grooves are formed in the lower end of the control rod, a limiting ring is arranged at the upper end of the control rod, and a second compression spring abutted between the limiting ring and the upper end face of the fixed seat barrel is sleeved on the outer peripheral face of the upper end of the control rod; one end of the pull wire is connected with the lower end of the control rod, and the other end of the pull wire penetrates through the threading hole and then is connected with the limiting step.

The embodiment of the invention is further characterized in that the bottom of the cavity is provided with a blind hole, a rotating shaft is rotatably inserted into the blind hole, and the upper end of the rotating shaft is connected with the pipe wall at one end of the fixed connecting pipe.

The embodiment of the invention is also characterized in that a sealing ring is embedded in the inner wall of the connecting hole.

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

An embodiment of the invention is further characterized in that the guide groove is L-shaped.

The embodiment of the invention is further characterized in that the central angle between two adjacent connecting holes is 30 degrees.

The embodiment of the invention is further 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.

The embodiment of the invention has the following advantages: the gas source fast switching device of the chromatograph continuous gas supply system is suitable for fast switching of gas sources of gas supply systems of various chromatograph instruments such as a liquid chromatogram-tandem mass spectrometer (LC-MS/MS), a Gas Chromatograph (GC), an inductively coupled plasma mass spectrometer (ICP-MS) and the like; the continuous supply of the air source can be ensured, and the normal use of the instrument is not influenced when the air source is replaced; meanwhile, a proper air supply mode can be selected according to the amount of a sample to be detected and the type of air source supply equipment, so that the detection cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a schematic perspective view of an air source fast switching device of a continuous air supply system of a chromatograph according to embodiment 1 of the present invention;

fig. 2 is a schematic perspective view of a housing according to embodiment 1 of the present invention;

fig. 3 is a schematic side view cross-sectional structure view of a quick air source switching device of a continuous air supply system of a chromatograph according to embodiment 1, in a relaxed state;

fig. 4 is a schematic side view cross-sectional structure view of a stretched rope of a fast switching device for an air source of a continuous air supply system of a chromatograph according to embodiment 1 of the present invention in a taut state;

fig. 5 is a schematic connection diagram of a fixed connection tube and a fixed seat tube provided in embodiment 1 of the present invention;

fig. 6 is a schematic side sectional view of a stationary base provided in embodiment 1 of the present invention;

fig. 7 is a schematic structural diagram of a fast gas source switching device of a continuous gas supply system of a chromatograph when a gas outlet pipe is communicated with a second gas inlet pipe according to embodiment 1 of the present invention;

fig. 8 is a schematic structural diagram of a fast gas source switching device of a continuous gas supply system of a chromatograph when a gas outlet pipe is communicated with a first gas inlet pipe according to embodiment 1 of the present invention;

fig. 9 is a schematic perspective view of an air source fast switching device of a continuous air supply system of a chromatograph according to embodiment 2 of the present invention;

fig. 10 is a schematic structural view of a steering control device according to embodiment 2 of the present invention;

fig. 11 is a schematic structural diagram of a fast gas source switching device of a chromatograph continuous gas supply system when a gas outlet pipe provided in embodiment 2 of the present invention is respectively communicated with a first gas inlet pipe and a fourth gas inlet pipe;

fig. 12 is a schematic structural diagram of a fast gas source switching device of a continuous gas supply system of a chromatograph when a gas outlet pipe provided in embodiment 2 of the present invention is respectively communicated with a first gas inlet pipe and a third gas inlet pipe;

fig. 13 is a schematic structural view of a fast gas source switching device of a chromatograph continuous gas supply system when a gas outlet pipe provided in embodiment 2 of the present invention is respectively communicated with a first gas inlet pipe, a second gas inlet pipe, and a fourth gas inlet pipe;

fig. 14 is a schematic structural view of a fast gas source switching device of a chromatograph continuous gas supply system when a gas outlet pipe provided in embodiment 2 of the present invention is respectively communicated with a first gas inlet pipe, a second gas inlet pipe, and a third gas inlet pipe;

fig. 15 is a schematic perspective view of an air source fast switching device of a continuous air supply system of a chromatograph according to embodiment 3 of the present invention;

description of reference numerals: 10. a housing; 20. a steering connecting pipeline; 30. a steering control device; 40. an air outlet pipe; 50. a first intake pipe; 60. a second intake pipe; 70. a third intake pipe; 80. a fourth intake pipe; 11. an installation port; 12. connecting holes; 13. blind holes; 14. a rotating shaft; 15. a seal ring; 21. a movable connecting pipe; 22. fixing the connecting pipe; 31. a stationary seat cylinder; 32. a control lever; 33. a pull wire; 41. an air valve; 211. a limiting step; 221. a first compression spring; 311. threading holes; 312. a guide groove; 321. a guide projection; 322. a limiting ring; 323. a second compression spring; 42. an electronic pressure gauge; 43. a notch; 44. lines are indicated.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.