CN217482033U

CN217482033U - Rotary valve and chromatographic experiment system with same

Info

Publication number: CN217482033U
Application number: CN202123433511.7U
Authority: CN
Inventors: 孙章超; 孙文改
Original assignee: Taidu Bio Tech Suzhou Co ltd
Current assignee: Taidu Bio Tech Suzhou Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-09-23
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a rotary valve and a chromatography experiment system with the rotary valve, which comprises a first valve body and a second valve body which can rotate relatively; the utility model discloses well third interface and fourth interface on the first valve body are in normal intercommunication state through outside pipeline, when palirrhea position, intercommunication between import and the export can communicate with the help of the outside pipeline between intercommunication third interface and the fourth interface, this is favorable to reducing the setting of rotary valve inner channel, be applicable to the environment that second valve body rotation angle is limited, for example, have the positive current position to rotate to palirrhea position and need not rotatory 180 degrees, only need rotate the angle that is less than 180 degrees can, the application flexibility of rotary valve has been improved.

Description

Rotary valve and chromatographic experiment system with same

Technical Field

The utility model relates to a fluidic equipment technical field, in particular to rotary valve and have chromatography experimental system of this rotary valve.

Background

The chromatographic equipment is an analytical instrument for separation by utilizing the difference between the physicochemical properties of each component in a mixture and the difference between the distribution degree and the flow speed of each substance through a chromatographic column.

When analyzing a sample using a chromatography device, it is generally necessary to realize a bypass, a forward flow, and a reverse flow path using a column valve. The pipeline of present needs frequent manual operation connection column appearance valve is in order to realize bypass, positive flow and palirrhea function, introduces gas easily among the operation process, leads to sneaking into the bubble in the sample fluid and influences the experimental result.

How to improve the accuracy of the experiment is a technical problem that the technicians in this field are always concerned about.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can improve the chromatography experimental system and test the chromatography experimental system of rotary valve and have this rotary valve of chromatography experimental system experiment accuracy nature.

The utility model provides a rotary valve, which comprises a first valve body and a second valve body which can rotate relatively; the first valve body is provided with a connecting surface and a first matching surface, and the connecting surface is provided with an inlet, an outlet, a first interface, a second interface, a third interface and a fourth interface; the third interface is communicated with the fourth interface through an external pipeline, and the first matching surface is provided with a first opening, a second opening, a third opening, a fourth opening, a fifth opening and a sixth opening which correspond to the first interface, the second interface, the third interface, the fourth interface, the inlet and the outlet and are communicated through the interior of the first valve body;

the second valve body is provided with a first flow passage, a second flow passage, a third flow passage and a fourth flow passage, and the flow passages are not communicated with each other;

the second valve body can rotate relative to the first valve body to a bypass position, a positive flow position and a reverse flow position;

the fifth opening is in direct communication with the sixth opening through the fourth flow passage when the second valve body is in the bypass position;

when the second valve body is in the positive flow position, the fifth opening communicates with the first opening through the fourth flow passage, and the second opening communicates with the sixth opening through the third flow passage;

when the second valve body is in the reverse flow position, the fifth opening is communicated with the second opening through the fourth flow passage, the first opening is communicated with the fourth opening through the second flow passage, and the third opening is communicated with the sixth opening through the first flow passage.

Third interface and fourth interface in this application are in normal communicating state through the external piping, when the backward flow position, intercommunication between import and the export can communicate with the help of the external piping between intercommunication third interface and the fourth interface, this is favorable to reducing the setting of rotary valve inner channel, be applicable to the restricted environment of second valve body rotation angle, for example, have the positive flow position to rotate to the backward flow position and need not rotatory 180 degrees, only need rotate less than 180 degrees the angle can, the flexibility of using of rotary valve has been improved.

Optionally, the second valve body has a second mating surface arranged opposite to the first mating surface, and the first mating surface and the second mating surface are in sealing rotation fit; the first flow channel, the second flow channel, the third flow channel and the fourth flow channel are all groove-shaped flow channels arranged on the second matching surface.

Optionally, the first flow channel, the second flow channel, and the third flow channel are all arc-shaped groove segments with the same diameter, and distances between rotation centers of the first opening and the fourth opening to the first matching surface are equal.

Optionally, the fourth flow channel is a radially extending groove-shaped flow channel, one end of the fourth flow channel is located at the rotation center of the second matching surface, and the distance from the other end of the fourth flow channel to the rotation center of the second matching surface is greater than the distance from the arc-shaped groove section to the rotation center; the fifth opening is located at the center of rotation of the first mating face.

Optionally, the first flow channel and the third flow channel are arranged asymmetrically with respect to the fourth flow channel.

Optionally, when the valve body is rotated from the positive flow position to the reverse flow position, the rotation angle of the second valve body ranges from 120 ° to 140 °.

Optionally, when the valve body is rotated from the positive flow position to the reverse flow position, the rotation angle of the second valve body is 135 °.

Optionally, the first mating surface and the second mating surface are both planar.

Optionally, the first to fourth ports, the inlet and the outlet are all located on the same cross section of the first valve body.

Furthermore, the utility model also provides a chromatography experimental system, including check out test set and pump sending part, still include two at least chromatography columns and above-mentioned arbitrary rotary valve, the first working port of chromatography column, second working port are connected respectively first interface, second interface, the import and the export of first valve body communicate respectively pump sending part with check out test set.

The utility model discloses a chromatography experimental system has arbitrary the implementation of the aforesaid rotary valve, so chromatography experimental system also has the above-mentioned technological effect of above-mentioned rotary valve.

Drawings

Fig. 1 is a schematic structural view of a rotary valve in a bypass state according to an embodiment of the present invention; there is shown a perspective view of the main structure of the rotary valve with the dashed lines being the main structure of the second valve body;

the structural diagram of the chromatography experimental system in a positive flow state is shown in FIG. 2;

FIG. 3 shows a schematic diagram of a chromatography experimental system in a reflux state;

fig. 4 is a perspective schematic view of a first valve body of the present invention;

fig. 5 is a three-dimensional schematic view of a second valve body according to an embodiment of the present invention;

fig. 6 is a schematic view illustrating a second mating surface of a second valve body according to an embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The technical scheme and technical effects are described by taking a rotary valve as an example for a chromatography experiment system, and a person skilled in the art should understand that the rotary valve in the present application can also be applied to other systems.

Referring to fig. 1 to 6, fig. 1 is a schematic structural view illustrating a rotary valve in a bypass state according to an embodiment of the present invention; the structural diagram of the chromatography experimental system in a positive flow state is shown in FIG. 2; FIG. 3 shows a schematic diagram of a chromatography experimental system in a reflux state;

fig. 4 is a perspective schematic view of a first valve body of the present invention; fig. 5 is a three-dimensional schematic view of a second valve body according to an embodiment of the present invention; fig. 6 is a schematic view of a second mating surface of a second valve body according to an embodiment of the present invention; fig. 1 to 4 are perspective structural views, and dotted lines in fig. 1 to 3 are main structures of the second valve body.

The utility model provides a chromatography experiment system includes check out test set 5, pumping unit 4 and rotary valve at least. The specific structure of the detection device 5 and the pumping member 4 is not described herein, but this does not hinder the understanding of the solution herein by the person skilled in the art.

The specific structure of the detection device 5 for analyzing the sample liquid is not specifically described herein, and reference is made to the prior art.

The pumping means 4 may be a pump, primarily for providing the motive force for the flow of the sample liquid in the chromatography experimental system.

The utility model provides a rotary valve, it is including the first valve body 1 and the second valve body 2 that can the relative rotation, that is to say, the second valve body 2 can rotate around the rotation center pin of the two. Usually, the second valve body may be partially located inside the first valve body 1, that is, the first valve body 1 has an inner cavity, and the second valve body 2 may be partially or completely located in the inner cavity of the first valve body 1, and the first valve body 1 and the second valve body 2 are rotated in a circumferential matching manner. The shapes of the first valve body 1 and the second valve body 2 can be designed according to needs, and are not limited in detail herein.

Of course, the second valve body 2 can also be located completely outside the first valve body 1.

In this embodiment, the first valve body 1 has a connecting surface 10 and a first mating surface 11, wherein the connecting surface 10 is provided with an inlet a for connecting the pumping means 4, an outlet B for connecting the inlet of the detection device 5, a first port E11, a second port E12, a third port E13 and a fourth port E14. The first interface E11 and the second interface E12 are respectively used for connecting a first working port and a second working port of the chromatographic column; the third port E13 and the fourth port E14 are communicated by a pipeline.

As will be appreciated from the above description, the connection surface 10 is primarily intended to provide a connection port for the tubing to the pumping means, chromatography column and detection equipment. The connecting surface 10 is typically the outer surface of the first valve body.

The inlet a, the outlet B and the interfaces may be disposed at suitable positions on the connecting surface 10 of the first valve body 1, as long as they can be reliably connected with other components, and the interfaces of the interface units may be identified for the reliability of the connecting pipeline and the improvement of the connecting efficiency.

The first mating surface 11 in this application is provided with first opening K11, second opening K12, third opening K13, fourth opening K14, fifth opening K15 and sixth opening K16, respectively through first valve body internal passage intercommunication first interface E11, second interface E12, third interface E13, fourth interface E14, import, export, an opening on the first mating surface 11 communicates interface or import or export on the connecting surface 10 through a passageway. As shown, the internal passages of the first valve body may be of the same shape or of different shapes.

The second valve body 2 is provided with a first flow passage S1, a second flow passage S2, a third flow passage S3, and a fourth flow passage L, which are non-conductive with each other; that is, the flow passages are independent of each other.

The second valve body 2 in the present application can rotate to a bypass position, a forward flow position and a reverse flow position relative to the first valve body 1; when the second valve body 2 is located at the bypass position, the fifth opening K15 is directly communicated with the sixth opening K16 through the fourth flow passage L; the flow direction of the fluid is: A-L-B.

When the second valve body 2 is located at the positive flow position, the fifth opening K15 communicates with the first opening K11 through the fourth flow passage, and the second opening K12 communicates with the sixth opening K16 through the third flow passage; the flow direction of the fluid is: A-L-E11-chromatographic column 3-E12-S3-B.

When the second valve body is in the reverse flow position, the fifth opening K15 is communicated with the second opening K12 through the fourth flow passage L, the first opening K11 is communicated with the fourth opening K14 through the second flow passage, and the third opening K13 is communicated with the sixth opening K16 through the first flow passage S1; the flow direction of the fluid is: A-L1-E12-chromatographic column 3-E11-S2-E14-E13-S1-B.

Third interface E13 and fourth interface E14 in this application are in the normal intercommunication state through the outside pipeline, when the palirrhea position, intercommunication between import A and the export B can communicate with the help of the outside pipeline between third interface E13 and the fourth interface E14 of intercommunication, this is favorable to reducing the setting of rotary valve inner channel, be applicable to the limited environment of second valve body 2 rotation angle, for example, have the positive current position to rotate to the palirrhea position and need not rotatory 180 degrees, only need rotate the angle that is less than 180 degrees can, the application flexibility of rotary valve has been improved.

In one embodiment, the second valve body 2 has a second mating surface 21 disposed opposite the first mating surface 11, the first mating surface 11 and the second mating surface 21 being in sealing rotational engagement; the first flow channel S1, the second flow channel S2, the third flow channel S3 and the fourth flow channel L1 are groove-shaped flow channels which are arranged on the second matching surface 21, the opening of each groove-shaped flow channel faces the first matching surface 11, the groove-shaped flow channel is simple in forming process, and forming cost of the second valve body is reduced. The groove-shaped flow channel can be formed in an injection molding integrated forming mode or a machining mode and the like.

In this embodiment, the first flow channel S1, the second flow channel S2, and the third flow channel S3 are all arc-shaped groove segments with the same diameter, and fig. 6 shows that the radius from the center line of the first flow channel S1, the second flow channel S2, and the third flow channel S3 to the rotation center O2 is R. Adjacent two of the first flow passage S1, the second flow passage S2, and the third flow passage S3 are spaced apart by a certain distance. The fourth flow passage L is a radially extending groove-shaped flow passage, one end of the fourth flow passage L is located at the rotation center O2 of the second matching surface 21, and the distance from the other end of the fourth flow passage L to the rotation center O2 of the second matching surface 21 is greater than the distance from the arc-shaped groove section to the rotation center, and the embodiment that the other end of the fourth flow passage L and the arc-shaped groove section have substantially the same diameter is shown in the figure. Accordingly, the fifth opening in the first valve body is located at the center of rotation of the first mating surface 11, so that the fifth opening and the fourth flow passage can be always aligned and communicated during rotation.

In this embodiment, the length of arc groove section can be decided according to specific product, and the arc groove section has certain arc length along circumference, all can keep bypass, positive current or palirrhea to switch on like this in certain rotation angle, can compensate the influence of processing and assembly error, improves the reliability of rotary valve work.

In this embodiment, the first flow passage S1 and the third flow passage S3 are asymmetrically arranged with respect to the fourth flow passage.

The angle of rotation of the second valve body when rotated from the forward flow position to the reverse flow position may range from 120 ° to 140 °, i.e., the angle of rotation of the second valve body may be any value within the range of 120 ° to 140 ° (including boundary values), and may be dependent upon the particular product application. For example, in one specific example, the angle of rotation of the second valve body is 135 °.

Both the first mating surface 11 and the second mating surface in this embodiment may also be curved or otherwise configured for mating.

In the above embodiments, the first port E11 to the fourth port E14, the inlet and the outlet of the first valve body are all located on the same cross section of the first valve body, which is convenient for processing, and of course, the first port E11 to the fourth port E14, the inlet and the outlet may all be located on different cross sections of the first valve body, so that the connection pipe can be identified for convenience.

In addition, the first valve body can be further provided with a standby interface: the first matching surface 11 is provided with openings communicated with the corresponding interfaces one by one, as shown in fig. 4, the opening K15 ' is communicated with the fifth interface E15, the opening K16 ' is communicated with the sixth interface E16, and the opening K17 ' is communicated with the seventh interface E17. The interfaces on the first valve body can be arranged according to the same angle, so that the universality of the first valve body can be improved. The number of ports on the first valve body is not limited to that described herein, and may be other values.

As mentioned above, the chromatography experimental system may further comprise a chromatography column and any one of the above rotary valves, wherein the first working port and the second working port of the chromatography column are respectively connected with the first interface E11 and the second interface E12 of one interface unit of the rotary valve, and the inlet 1a 'and the outlet 1 b' of the first valve body 1 are respectively communicated with the pumping unit 4 and the detection device 5.

The utility model discloses a chromatography experimental system has arbitrary the implementation of above-mentioned rotary valve, so chromatography experimental system also has the above-mentioned technological effect of above-mentioned rotary valve.

It is right above the utility model provides a chromatography experimental system of rotary valve and having this rotary valve has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A rotary valve comprising a first valve body and a second valve body which are relatively rotatable; the first valve body is provided with a connecting surface and a first matching surface, and the connecting surface is provided with an inlet, an outlet, a first interface, a second interface, a third interface and a fourth interface; the third interface is communicated with the fourth interface through an external pipeline, and the first matching surface is provided with a first opening, a second opening, a third opening, a fourth opening, a fifth opening and a sixth opening which correspond to the first interface, the second interface, the third interface, the fourth interface, the inlet and the outlet and are communicated through the interior of the first valve body;

when the second valve body is in the reverse flow position, the fifth opening communicates with the second opening through the fourth flow passage, the first opening communicates with the fourth opening through the second flow passage, and the third opening communicates with the sixth opening through the first flow passage;

the second valve body is provided with a second matching surface arranged opposite to the first matching surface, and the first matching surface and the second matching surface are in sealing rotation matching; the first flow channel, the second flow channel, the third flow channel and the fourth flow channel are all groove-shaped flow channels arranged on the second matching surface; the first flow channel, the second flow channel and the third flow channel are all arc-shaped groove sections with the same diameter, and the distances from the first opening to the fourth opening to the rotation center of the first matching surface are equal; the fourth flow channel is a radially extending groove-shaped flow channel, one end of the fourth flow channel is positioned at the rotation center of the second matching surface, and the distance from the other end of the fourth flow channel to the rotation center of the second matching surface is greater than the distance from the arc-shaped groove section to the rotation center; the fifth opening is located at the center of rotation of the first mating face.

2. The rotary valve of claim 1, wherein the first flow channel and the third flow channel are asymmetrically disposed about the fourth flow channel.

3. The rotary valve as set forth in claim 2 wherein the angle of rotation of said second valve body ranges from 120 ° to 140 ° when rotated from said forward flow position to said reverse flow position.

4. The rotary valve as set forth in claim 3 wherein the angle of rotation of said second valve body when rotated from said forward flow position to said reverse flow position is 135 °.

5. A rotary valve as claimed in any one of claims 1 to 4 wherein said first mating surface and said second mating surface are both planar.

6. A rotary valve as claimed in any one of claims 1 to 4, wherein said first to fourth ports, said inlet and said outlet are all located on the same cross-section of said first valve body.

7. A chromatography experiment system, comprising a detection device and a pumping part, and further comprising at least two chromatography columns and a rotary valve of any one of claims 1 to 6, wherein a first working port and a second working port of each chromatography column are respectively connected with the first interface and the second interface, and an inlet and an outlet of the first valve body are respectively communicated with the pumping part and the detection device.