Multi-pass switching valve for liquid chromatography tandem mass spectrometry

Abstract

The utility model discloses a multi-pass switching valve of liquid chromatography tandem mass spectrometry, and belongs to the technical field of multi-pass switching valves. Comprising a switching valve and further comprises a protective shell used for protecting the switching valve, the protective shell comprises a cylindrical shell body, the top of the shell body is detachably connected with a shell cover, a first threaded hole is formed in the end of the shell body, a first threaded rod used for being screwed into the first threaded hole is integrally formed on one side of the shell cover, and an opening used for the end of the switching valve to stretch out is formed in the shell cover. And a cylinder for protecting the end part of the switching valve is integrally formed at the top of the opening on the shell cover. According to the switching valve, when the switching valve is in contact with corrosive substances, dust or water vapor and the like, the external substances cannot enter the switching valve, corrosion and pollution to the interior of the switching valve cannot be caused, normal operation of the switching valve and the purity of fluid in the valve cannot be affected, the service life of the switching valve cannot be shortened, and the switching valve is very convenient to use.

Description

Technical Field

[0001] The utility model relates to a multi-way switching valve for liquid chromatography tandem mass spectrometry, belonging to the technical field of multi-way switching valves. Background Art

[0002] Multi-port switching valves in liquid chromatography-tandem mass spectrometry are primarily used to switch and connect multiple fluid channels to enable operations such as separation, mixing, or injection of different fluids. Multi-port switching valves typically consist of a valve body, valve core, drive mechanism, and associated seals and connectors.

[0003] In some specialized applications, such as those in the chemical, food processing, or pharmaceutical industries, multi-position switching valves are exposed to corrosive substances, dust, or moisture. These foreign substances can enter the valve interior, corroding and contaminating it. This not only affects its normal operation and the purity of the fluid within it, but also shortens its service life. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a multi-position switching valve for liquid chromatography-tandem mass spectrometry. This solves the problem in the prior art that multi-position switching valves are exposed to corrosive substances, dust, or water vapor. These foreign substances enter the interior of the switching valve, causing corrosion and contamination, which not only affects the normal operation of the switching valve and the purity of the fluid inside the valve, but also shortens the service life of the switching valve.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical scheme: a multi-position switching valve for liquid chromatography tandem mass spectrometry, comprising a switching valve and a protective shell for protecting the switching valve, the protective shell comprising a cylindrical shell, the top of the shell being detachably connected to a shell cover, a threaded hole being provided at the end of the shell, a threaded rod being integrally formed on one side of the shell cover for screwing into the threaded hole, an opening for the end of the switching valve to extend out being provided on the shell cover, a cylinder being integrally formed on the top of the opening on the shell cover for protecting the end of the switching valve, the bottom of the shell being detachably connected to the shell bottom through a fixing part, and a circular hole being provided on the shell bottom.

[0006] By adopting the above technical solution, when it is necessary to fix the protective shell on the switching valve, first place the switching valve in the shell, then pick up the shell cover, and align the opening with the end of the switching valve, and at the same time move the shell cover toward the shell, while rotating it, so that the threaded rod is rotated and stuck into the threaded hole, and the end of the switching valve is located in the cylinder, then, pass the line connecting one end of the switching valve and the outside through the circular hole, and then use the fixing parts to fix the bottom of the shell to the shell, and the protective shell can be installed on the outside of the switching valve. Through the structure of the present application, when the switching valve comes into contact with corrosive substances, dust or water vapor, these external substances will not enter the interior of the switching valve, and will not cause corrosion and pollution to the interior of the switching valve, will not affect the normal operation of the switching valve and the purity of the fluid in the valve, and will not shorten the service life of the switching valve, which is very convenient.

[0007] The utility model is further configured as follows: a plurality of rotating blocks are integrally formed on the outer peripheral wall of the cylinder.

[0008] By adopting the above technical solution, the setting of the rotating block allows the user to more easily grasp and rotate the cylinder with his hands or tools (such as a wrench) to rotate the shell cover, thereby improving the convenience and efficiency of operation, especially when the shell cover needs to be removed frequently.

[0009] The utility model is further configured as follows: the fixing part includes a fixing rod, a fixing hole for the fixing rod to be inserted is provided on the protrusion and the shell, a threaded structure is provided at one end of the fixing rod, a fixing seat is integrally formed on the inner wall of the shell, a threaded hole two is provided in the fixing seat for the fixing rod to be screwed in, and a nut is fixed on the fixing rod.

[0010] By adopting the above technical solution, after the protrusion is inserted into the U-shaped groove, it is only necessary to insert the fixing rod into the fixing hole while rotating the nut so that the fixing rod is inserted into the fixing seat along the second threaded hole to complete the fixing of the shell bottom, which is very convenient.

[0011] The utility model is further configured as follows: a sealing ring is fixed on one side of the shell cover close to the shell body.

[0012] By adopting the above technical solution, a sealing ring is set. When the shell cover is rotated and stuck into the shell, the sealing ring will deform due to the downward pressure on the shell cover, filling the gap between the shell cover and the shell, thereby achieving a sealing effect and further preventing liquid or dust from contacting the switching valve, which is very effective.

[0013] The beneficial effect of the present invention is as follows: when it is necessary to fix the protective shell on the switching valve, first place the switching valve in the shell, then pick up the shell cover, and align the opening with the end of the switching valve, and at the same time move the shell cover toward the shell, while rotating it, so that the threaded rod is rotated and stuck into the threaded hole, and the end of the switching valve is located in the cylinder, then, pass the line connecting one end of the switching valve and the outside through the circular hole, and then use the fixing parts to fix the shell bottom to the shell, and the protective shell can be installed on the outside of the switching valve. Through the structure of the present application, when the switching valve comes into contact with corrosive substances, dust or water vapor, these external substances will not enter the interior of the switching valve, and will not cause corrosion and pollution to the interior of the switching valve, will not affect the normal operation of the switching valve and the purity of the fluid in the valve, and will not shorten the service life of the switching valve, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is an explosion diagram of the utility model;

[0016] Figure 3 It is a half-section view of the shell and a schematic diagram of the shell bottom in the utility model.

[0017] In the figure: 1. Switching valve; 2. Shell; 3. Shell cover; 4. Threaded hole 1; 5. Threaded rod 1; 6. Opening; 7. Round hole; 8. Shell bottom; 9. Rotating block; 10. U-shaped groove; 11. Fixing rod; 12. Fixing hole; 13. Fixing seat; 14. Threaded hole 2; 15. Nut; 16. Protective shell; 17. Sealing ring; 18. Cylinder; 19. Bump. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0019] like Figure 1 and Figure 2 As shown, a multi-position switching valve 1 for liquid chromatography tandem mass spectrometry includes a switching valve 1 and a protective shell 16 for protecting the switching valve 1. The protective shell 16 includes a cylindrical shell 2, the top of the shell 2 is detachably connected to a shell cover 3, the end of the shell 2 is provided with a threaded hole 4, and one side of the shell cover 3 is integrally formed with a threaded rod 5 for screwing into the threaded hole 4, an opening 6 for the end of the switching valve 1 to extend out is provided on the shell cover 3, and a cylinder 18 for protecting the end of the switching valve 1 is integrally formed on the shell cover 3 at the top of the opening 6, and the bottom of the shell 2 is detachably connected to a shell bottom 8 through a fixing part, and the shell bottom 8 is provided with a circular hole 7.

[0020] When it is necessary to fix the protective shell 16 on the switching valve 1, first place the switching valve 1 in the shell 2, then pick up the shell cover 3, and align the opening 6 with the end of the switching valve 1. At the same time, move the shell cover 3 toward the shell 2, and rotate it while moving, so that the threaded rod 15 is rotated and stuck into the threaded hole 14, and the end of the switching valve 1 is located in the cylinder 18. Then, pass the connection line between one end of the switching valve 1 and the outside through the circular hole 7, and then use the fixing parts to fix the shell bottom 8 to the shell 2, and the protective shell 16 can be installed on the outside of the switching valve 1. Through the structure of the present application, when the switching valve 1 comes into contact with corrosive substances, dust or water vapor, these external substances will not enter the interior of the switching valve 1, and will not cause corrosion and pollution to the interior of the switching valve 1, will not affect the normal operation of the switching valve 1 and the purity of the fluid in the valve, and will not shorten the service life of the switching valve 1, which is very convenient.

[0021] like Figure 1 As shown, a plurality of rotating blocks 9 are integrally formed on the outer peripheral wall of the cylinder 18 .

[0022] The provision of the rotating block 9 allows the user to more easily grasp and rotate the cylinder 18 with his hands or a tool (such as a wrench) to rotate the shell cover 3, thereby improving the convenience and efficiency of the operation, especially when the shell cover 3 needs to be frequently disassembled.

[0023] like Figure 3 As shown, a U-shaped groove 10 is formed on one side of the bottom of the shell 2 along the circumferential direction, and a protrusion 19 for being inserted into the U-shaped groove 10 is integrally formed on one side of the top of the shell bottom 8 along the circumferential direction.

[0024] When the shell bottom 8 needs to be connected to the shell body 2, it is only necessary to insert the protrusion 19 into the U-shaped groove 10 to complete the process, which is very convenient.

[0025] like Figure 3 As shown, the fixing part includes a fixing rod 11, and a fixing hole 12 for the fixing rod 11 to be inserted is provided on the protrusion 19 and the shell 2. A threaded structure is provided at one end of the fixing rod 11, and a fixing seat 13 is integrally formed on the inner wall of the shell 2. A threaded hole 14 is provided in the fixing seat 13 for the fixing rod 11 to be screwed in, and a nut 15 is fixed on the fixing rod 11.

[0026] When the protrusion 19 is inserted into the U-shaped groove 10, the fixing rod 11 only needs to be inserted into the fixing hole 12 while rotating the nut 15 so that the fixing rod 11 is inserted into the fixing seat 13 along the second threaded hole 14 to complete the fixing of the shell bottom 8, which is very convenient.

[0027] like Figure 2 As shown, a sealing ring 17 is fixed to the side of the housing cover 3 close to the housing 2 .

[0028] The sealing ring 17 is provided. When the shell cover 3 is rotated and clamped into the shell 2, the shell cover 3 is subjected to downward pressure, and the sealing ring 17 will be deformed to fill the gap between the shell cover 3 and the shell 2, thereby achieving a sealing effect and further preventing liquid or dust from contacting the switching valve 1, which is very effective.

[0029] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art will appreciate that the present invention is not limited to the above embodiments and that various modifications and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such modifications and improvements fall within the scope of protection claimed by the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-position switching valve for liquid chromatography tandem mass spectrometry, comprising a switching valve (1), characterized in that: The invention also includes a protective shell (16) for protecting the switching valve (1), wherein the protective shell (16) includes a shell (2), the top of the shell (2) is detachably connected to a shell cover (3), the end of the shell (2) is provided with a threaded hole (4), one side of the shell cover (3) is provided with a threaded rod (5) for screwing into the threaded hole (4), the shell cover (3) is provided with an opening (6) for the end of the switching valve (1) to extend out, the bottom of the shell (2) is detachably connected to a shell bottom (8) through a fixing member, and the shell bottom (8) is provided with a circular hole (7).

2. The multi-position switching valve for liquid chromatography tandem mass spectrometry according to claim 1, characterized in that: A cylinder (18) for protecting the end of the switching valve (1) is provided on the shell cover (3) at the top of the opening (6).

3. The multi-position switching valve for liquid chromatography tandem mass spectrometry according to claim 2, characterized in that: A plurality of rotating blocks (9) are provided on the outer peripheral wall of the cylinder (18).

4. The multi-position switching valve for liquid chromatography tandem mass spectrometry according to claim 1, characterized in that: A U-shaped groove (10) is provided at the bottom of the shell (2), and a protrusion (19) for snapping into the U-shaped groove (10) is provided at the top of the shell bottom (8).

5. The multi-position switching valve for liquid chromatography tandem mass spectrometry according to claim 4, characterized in that: The fixing member comprises a fixing rod (11), and both the protrusion (19) and the housing (2) are provided with a fixing hole (12) for the fixing rod (11) to be snapped into.

6. The multi-position switching valve for liquid chromatography tandem mass spectrometry according to claim 5, characterized in that: One end of the fixing rod (11) is provided with a threaded structure, and a fixing seat (13) is provided on the inner wall of the housing (2). A second threaded hole (14) for screwing the fixing rod (11) is provided in the fixing seat (13).

7. The multi-position switching valve for liquid chromatography tandem mass spectrometry according to claim 6, characterized in that: A nut (15) is provided on the fixing rod (11).

8. The multi-position switching valve for liquid chromatography tandem mass spectrometry according to claim 1, characterized in that: A sealing ring (17) is provided on one side of the shell cover (3).

Images