CN211649148U

CN211649148U - Switching valve for mass spectrometer

Info

Publication number: CN211649148U
Application number: CN201922057298.0U
Authority: CN
Inventors: 方垂
Original assignee: Shenzhen Weinafi Biotechnology Co ltd
Current assignee: Shenzhen Weinafi Biotechnology Co ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-10-09
Anticipated expiration: 2029-11-25

Abstract

The utility model relates to a diverter valve for mass spectrometer, including inlet pipe, valve body, first connecting pipe, second connecting pipe and switching mechanism, switching mechanism includes lifting unit, valve plate, seal assembly and two sealing washers, seal assembly includes fixed plate, sealed piece and a plurality of spring, and this diverter valve for mass spectrometer realizes the switching to measured material flow path through switching mechanism, has improved the gas tightness to reduce the air disturbance in the mass spectrometer, thereby improved the practicality.

Description

Switching valve for mass spectrometer

Technical Field

The utility model relates to a mass spectrograph field, in particular to diverter valve for mass spectrometer.

Background

Mass spectrometers are also known as mass spectrometers. Apparatus for separating and detecting different isotopes. That is, based on the principle that charged particles can deflect in an electromagnetic field, the instrument separates and detects the composition of substances according to the mass difference of substance atoms, molecules or molecular fragments. The mass spectrometer usually comprises a switching valve which realizes the opening and closing of a valve plate by utilizing a connecting rod structure principle.

The existing switching valve is controlled by an electromagnetic valve, the state of the electromagnetic valve needs to be matched with the state of the switching valve, the switching valve is troublesome, the air tightness is not good, once the switching valve in a mass spectrometer leaks air, the measuring precision of an instrument is possibly influenced, and the practicability is reduced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to overcome the defects of the prior art, a switching valve for a mass spectrometer is provided.

The utility model provides a technical scheme that its technical problem adopted is: a switching valve for a mass spectrometer comprises a feeding pipe, a valve body, a first connecting pipe, a second connecting pipe and a switching mechanism, wherein the feeding pipe is communicated with one side of the valve body;

the switching mechanism comprises a lifting assembly, a valve plate, a sealing assembly and two sealing rings, wherein the lifting assembly is positioned above the valve body, one of the two sealing rings is fixed at the communication position of the first connecting pipe and the valve body, the other sealing ring is fixed at the communication position of the second connecting pipe and the valve body, the valve plate is abutted against one of the sealing rings, the lifting assembly is connected with the valve plate, a through hole is formed in the valve plate, the sealing assembly is positioned in the through hole, and the diameter of the through hole is larger than that of the sealing ring;

the sealing assembly comprises a fixing plate, a sealing block and a plurality of springs, the fixing plate is fixed on one side, close to the lifting assembly, in the through hole, the sealing block is connected with the inner wall of the through hole in a sealing mode, and two ends of each spring are fixed on the sealing block and the fixing plate respectively.

As preferred, in order to realize the function of switching, lifting unit includes motor, dead lever, lead screw and sleeve pipe, the top of valve body is equipped with the perforation, sleeve pipe and perforation sealing connection, the one end setting of lead screw is at the intraductal, sheathed tube and the junction of lead screw are equipped with the screw thread that matches with the lead screw, the motor passes through the outer wall fixed connection of dead lever with the top of valve body, the motor is connected with the other end transmission of lead screw, sheathed tube one end and valve plate fixed connection of keeping away from the lead screw.

Preferably, in order to limit the moving direction of the sleeve, one end, far away from the valve plate, of the sleeve is provided with a limiting ring, and the limiting ring is sleeved on the fixing rod.

Preferably, the motor is a servo motor in order to increase the driving force of the motor.

Preferably, in order to prevent air leakage from the perforations, the perforations are internally coated with a sealing grease.

Preferably, in order to improve the sealing performance, one end of the sealing block, which is far away from the fixing plate, is in the shape of a conical cylinder, and the side surface of the conical cylinder of the sealing block abuts against the sealing ring.

The beneficial effects of the utility model are that, this diverter valve for mass spectrograph realizes the switching to the measured object material flow path through switching mechanism, compares with current switching mechanism, and this switching mechanism has improved the gas tightness to reduce the air disturbance in the mass spectrograph, thereby improved the practicality.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a switching valve for a mass spectrometer of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

in the figure: 1. the valve comprises a feeding pipe, a valve body, a first connecting pipe, a second connecting pipe, a valve plate, a sealing ring, a fixing plate, a sealing block, a spring, a motor, a fixing rod, a screw rod, a sleeve and a limiting ring, wherein the feeding pipe comprises 2, the valve body, 3, the first connecting pipe, 4, the second connecting pipe, 5, the valve plate, 6, the sealing ring, 7, the fixing plate, 8, the sealing block.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, a switching valve for a mass spectrometer includes a feeding pipe 1, a valve body 2, a first connecting pipe 3, a second connecting pipe 4 and a switching mechanism, wherein the feeding pipe 1 is communicated with one side of the valve body 2, the first connecting pipe 3 and the second connecting pipe 4 are respectively communicated with the upper part and the lower part of the other side of the valve body 2, and the switching mechanism is arranged in the valve body 2;

in fact, in this diverter valve for mass spectrometer, first connecting pipe 3 and vacuum pump connection, switching mechanism opens first connecting pipe 3 earlier, seals second connecting pipe 4, makes the vacuum pump with evacuation in the valve body 2, and switching mechanism seals first connecting pipe 3 again, opens second connecting pipe 4, and the measured material of being convenient for enters into valve body 2 from inlet pipe 1 in, flows into second connecting pipe 4 again to realize the function of switching.

As shown in fig. 2, the switching mechanism includes a lifting assembly, a valve plate 5, a sealing assembly and two sealing rings 6, the lifting assembly is located above the valve body 2, one of the two sealing rings 6 is fixed at a communication position of the first connecting pipe 3 and the valve body 2, the other sealing ring 6 is fixed at a communication position of the second connecting pipe 4 and the valve body 2, the valve plate 5 abuts against one of the sealing rings 6, the lifting assembly is connected with the valve plate 5, a through hole is formed in the valve plate 5, the sealing assembly is located in the through hole, and the diameter of the through hole is larger than that of the sealing ring 6;

the sealing assembly comprises a fixing plate 7, a sealing block 8 and a plurality of springs 9, the fixing plate 7 is fixed on one side, close to the lifting assembly, in the through hole, the sealing block 8 is in sealing connection with the inner wall of the through hole, two ends of each spring 9 are fixed on the sealing block 8 and the fixing plate 7 respectively, and the springs 9 are in a compression state.

Switching mechanism during operation, lifting unit drive valve plate 5 from a sealing washer 6 on moving another sealing washer 6, when valve plate 5 left original sealing washer 6, sealed piece 8 drove spring 9 and compresses, sealed piece 8 is retracted to the through-hole in, when valve plate 5 removed the back and supported and lean on another sealing washer 6, spring 9 drove sealed piece 8 and moves to the direction of keeping away from fixed plate 7 to make sealed piece 8 also support and lean on sealing washer 6, strengthen sealing performance.

Preferably, in order to realize the switching function, the lifting assembly comprises a motor 10, a fixing rod 11, a screw rod 12 and a sleeve 13, a through hole is formed above the valve body 2, the sleeve 13 is hermetically connected with the through hole, one end of the screw rod 12 is arranged in the sleeve 13, a thread matched with the screw rod 12 is arranged at the joint of the sleeve 13 and the screw rod 12, the motor 10 is fixedly connected with the outer wall of the upper part of the valve body 2 through the fixing rod 11, the motor 10 is in transmission connection with the other end of the screw rod 12, and one end of the sleeve 13, which is far away from the screw rod 12, is fixedly connected with the valve plate 5.

Preferably, in order to limit the moving direction of the sleeve 13, a limit ring 14 is arranged at one end of the sleeve 13 far away from the valve plate 5, and the limit ring 14 is sleeved on the fixing rod 11.

The motor 10 drives the screw rod 12 to rotate, the sleeve 13 is driven to move, meanwhile, the sleeve 13 drives the limiting ring 14 to slide along the fixing rod 11, and the sleeve 13 drives the valve plate 5 to move, so that the switching function is realized.

Preferably, the motor 10 is a servo motor in order to increase the driving force of the motor 10.

Preferably, in order to improve the sealing performance, one end of the sealing block 8 far away from the fixing plate 7 is in the shape of a conical cylinder, and the side surface of the conical cylinder of the sealing block 8 abuts against the sealing ring 6.

The vacuum pump is through first connecting pipe 3 with evacuation in the valve body 2, then motor 10 drive lead screw 12 rotates, sleeve pipe 13 drives valve plate 5 rebound, because the one end of keeping away from fixed plate 7 of sealed piece 8 is the toper, can contract in the through-hole when sealed piece 8 rebound, and drive the compression of spring 9, support when leaning on the sealing washer 6 that is close to first connecting pipe 3 after valve plate 5 removes, spring 9 drives sealed piece 8 and removes to the direction of keeping away from fixed plate 7, make sealed piece 8 support and lean on being close to first connecting pipe 3 sealing washer 6, strengthen sealing performance, the measured object matter is followed inlet pipe 1 again and is entered into in the valve body 2, rethread second connecting pipe 4 flows, thereby realize the function of switching.

Compared with the prior art, the switching valve for the mass spectrometer realizes switching of the flow path of the measured object through the switching mechanism, and compared with the existing switching mechanism, the switching mechanism improves the air tightness so as to reduce air disturbance in the mass spectrometer and improve the practicability.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The switching valve for the mass spectrometer is characterized by comprising a feeding pipe (1), a valve body (2), a first connecting pipe (3), a second connecting pipe (4) and a switching mechanism, wherein the feeding pipe (1) is communicated with one side of the valve body (2), the first connecting pipe (3) and the second connecting pipe (4) are respectively communicated with the upper part and the lower part of the other side of the valve body (2), and the switching mechanism is arranged in the valve body (2);

the switching mechanism comprises a lifting assembly, a valve plate (5), a sealing assembly and two sealing rings (6), the lifting assembly is located above the valve body (2), one sealing ring (6) is fixed at the communication position of the first connecting pipe (3) and the valve body (2), the other sealing ring (6) is fixed at the communication position of the second connecting pipe (4) and the valve body (2), the valve plate (5) abuts against one sealing ring (6), the lifting assembly is connected with the valve plate (5), a through hole is formed in the valve plate (5), the sealing assembly is located in the through hole, and the diameter of the through hole is larger than that of the sealing ring (6);

the sealing assembly comprises a fixing plate (7), a sealing block (8) and a plurality of springs (9), wherein the fixing plate (7) is fixed on one side, close to the lifting assembly, in the through hole, the sealing block (8) is connected with the inner wall of the through hole in a sealing mode, two ends of each spring (9) are fixed on the sealing block (8) and the fixing plate (7) respectively, and each spring (9) is in a compression state.

2. The switching valve for mass spectrometer as claimed in claim 1, wherein the lifting assembly comprises a motor (10), a fixing rod (11), a screw rod (12) and a sleeve (13), a through hole is formed above the valve body (2), the sleeve (13) is hermetically connected with the through hole, one end of the screw rod (12) is arranged in the sleeve (13), a thread matched with the screw rod (12) is arranged at the joint of the sleeve (13) and the screw rod (12), the motor (10) is fixedly connected with the outer wall above the valve body (2) through the fixing rod (11), the motor (10) is in transmission connection with the other end of the screw rod (12), and one end of the sleeve (13) far away from the screw rod (12) is fixedly connected with the valve plate (5).

3. The switching valve for mass spectrometer as claimed in claim 2, wherein a limit ring (14) is disposed at one end of the sleeve (13) far away from the valve plate (5), and the limit ring (14) is sleeved on the fixing rod (11).

4. The switching valve for mass spectrometers as claimed in claim 2, characterized in that the motor (10) is a servomotor.

5. The switching valve for mass spectrometer as claimed in claim 2, wherein said through hole is coated with a sealing grease.

6. The switching valve for a mass spectrometer as claimed in claim 1, characterized in that the end of the sealing block (8) remote from the fixed plate (7) is shaped as a conical cylinder, the side of the conical cylinder of the sealing block (8) resting on the sealing ring (6).