阅读说明：本技术 一种基于双层析柱的流体切换阀 (Fluid switching valve based on double chromatographic columns ) 是由 朱志勇 杨涛 翟晗朝 于 2019-11-19 设计创作，主要内容包括：本发明主要涉及流体控制技术领域,提供了一种基于双层析柱的流体切换阀,包括定子、转子、第一层析柱和第二层析柱,定子包括的第一连通口和第五连通口分别与上游流路连通,第二连通口和第二层析柱的第二端分别与下游流路连通,第六连通口与第七连通口连通,第一层析柱的第一端与第七连通口连通,第二端与第三连通口连通,第四连通口与第二层析柱的第一端连通；实施本发明仅需通过一个切换阀,通过转动转子,改变各个连通口之间的相互连通状态,从而实现流体直通、正向流经第一层析柱、逆向流经第一层析柱、串联第一层析柱和第二层析柱、流经第二层析柱等多种功能,有效节省成本,降低流体控制系统的设计难度,同时可提高流体控制体系的稳定性。(The invention mainly relates to the technical field of fluid control, and provides a fluid switching valve based on double chromatographic columns, which comprises a stator, a rotor, a first chromatographic column and a second chromatographic column, wherein a first communicating port and a fifth communicating port which are arranged on the stator are respectively communicated with an upstream flow path, second ends of the second communicating port and the second chromatographic column are respectively communicated with a downstream flow path, a sixth communicating port is communicated with a seventh communicating port, a first end of the first chromatographic column is communicated with the seventh communicating port, a second end of the first chromatographic column is communicated with a third communicating port, and a fourth communicating port is communicated with a first end of the second chromatographic column; the invention only needs one switching valve, and changes the mutual communication state of each communication port by rotating the rotor, thereby realizing multiple functions of fluid direct connection, forward flow through the first chromatographic column, reverse flow through the first chromatographic column, series connection of the first chromatographic column and the second chromatographic column, flow through the second chromatographic column and the like, effectively saving cost, reducing the design difficulty of a fluid control system, and simultaneously improving the stability of the fluid control system.)

1. A dual chromatography column based fluid switching valve, comprising:

a stator (7), a rotor (8), a first chromatographic column (A) and a second chromatographic column (B);

the stator (7) comprises a first communication port (0), a second communication port (1), a third communication port (2), a fourth communication port (3), a fifth communication port (4), a sixth communication port (5) and a seventh communication port (6);

wherein the first communication port (0) and the fifth communication port (4) are respectively in communication with an upstream flow path, the second communication port (1) is in communication with a downstream flow path, the sixth communication port (5) is in communication with the seventh communication port (6), the seventh communication port (6) is in communication with a first end (9) of the first chromatography column (A), the third communication port (2) is in communication with a second end (10) of the first chromatography column (A), the fourth communication port (3) is in communication with a first end (11) of the second chromatography column (B), and the second end (12) of the second chromatography column (B) is in communication with the downstream flow path.

2. The dual column based fluid switching valve according to claim 1, wherein the second communication port (1), the third communication port (2), the fourth communication port (3), the fifth communication port (4) and the sixth communication port (5) are evenly distributed at an outer ring of the stator (7), the seventh communication port (6) is located at an inner ring of the stator (7), and the first communication port (0) is located at a center of the stator (7).

3. The dual chromatography column based fluid switching valve according to claim 2, wherein the rotor (8) comprises a first part comprising a first port (13) and a second port (14) in communication with each other and a second part comprising a third port (15), a fourth port (16), a fifth port (17) and a sixth port (18) in communication with each other, wherein the sixth port (18) is in communication with the first communication port (0).

4. The dual chromatography column based fluid switching valve according to claim 3, wherein the first part is arc-shaped and has an arc length equal to the arc length between any two adjacent communication ports on the outer ring of the stator (7), wherein the arc length of the first part, the arc length of the stator (7) and the arc length between any two adjacent communication ports on the outer ring of the stator (7) are equal, and wherein the distance between the second port (14) and the third port (15) is equal to the distance between any two adjacent communication ports on the outer ring of the stator (7).

5. The dual column based fluid switching valve according to claim 4, wherein the first interface (13) and the second interface (14) each correspond to the second communication port (1), the third communication port (2), the fourth communication port (3), the fifth communication port (4) and the sixth communication port (5), respectively, and the third interface (15) corresponds to the second communication port (1) and the third communication port (2), respectively.

6. The dual chromatography column based fluid switching valve according to claim 5, wherein the first port (13) is in communication with the fifth communication port (4), the second port (14) is in communication with the sixth communication port (5), the third port (15) is in communication with the second communication port (1) when the rotor (8) is in a first position, which is a position between the fifth communication port (4) and the sixth communication port (5).

7. The dual chromatography column based fluid switching valve according to claim 5, wherein the first port (13) is in communication with the sixth communication port (5), the second port (14) is in communication with the second communication port (1), the third port (15) is in communication with the third communication port (2) when the rotor (8) is in a second position, which is a position between the sixth communication port (5) and the second communication port (1).

8. The dual chromatography column based fluid switching valve according to claim 5, wherein the first port (13) is in communication with the second communication port (1), the second port (14) is in communication with the third communication port (2), the fifth port (17) is in communication with the seventh communication port (6) when the rotor (8) is in a third position, which is a position between the second communication port (1) and the third communication port (2).

9. The dual chromatography column based fluid switching valve according to claim 5, wherein the first port (13) is in communication with the third communication port (2), the second port (14) is in communication with the fourth communication port (3), the fourth port (16) is in communication with the seventh communication port (6), and the fourth position is a position between the third communication port (2) and the fourth communication port (3) when the rotor (8) is in a fourth position.

10. The dual chromatography column based fluid switching valve according to claim 5, wherein the first port (13) is in communication with the fourth communication port (3), the second port (14) is in communication with the fifth communication port (4) when the rotor (8) is in a fifth position, the fifth position being a position between the fourth communication port (3) and the fifth communication port (4).

Technical Field

The invention relates to the technical field of fluid control, in particular to a fluid switching valve based on double chromatographic columns.

Background

In the fluid control system, it is often necessary to realize functions such as changing the direction of a fluid, selecting a different flow path, and connecting flow paths in series, but in the prior art, it is often necessary to use two or more devices such as switching valves and pumps. However, too many switching valves and pumps increase the complexity of the fluid control system, which results in an increase in the difficulty of designing the fluid control system.

Disclosure of Invention

The embodiment of the invention provides a fluid switching valve based on double chromatographic columns, which can simultaneously realize the purposes of changing the direction of fluid, selecting different chromatographic columns and reversely using the functions of the chromatographic columns, and mainly aims to solve the technical problem that the design difficulty of a fluid control system is increased due to excessive switching valves, pumps and other equipment in a fluid control system in the prior art.

Provided is a dual chromatography column based fluid switching valve, which specifically comprises:

the device comprises a stator, a rotor, a first chromatographic column and a second chromatographic column;

the stator comprises a first communication port, a second communication port, a third communication port, a fourth communication port, a fifth communication port, a sixth communication port and a seventh communication port;

wherein the first communication port and the fifth communication port are respectively communicated with an upstream flow path, the second communication port is communicated with a downstream flow path, the sixth communication port is communicated with the seventh communication port, the seventh communication port is communicated with the first end of the first chromatography column, the third communication port is communicated with the second end of the first chromatography column, the fourth communication port is communicated with the first end of the second chromatography column, and the second end of the second chromatography column is communicated with the downstream flow path.

Preferably, the second communication port, the third communication port, the fourth communication port, the fifth communication port and the sixth communication port are uniformly distributed on an outer ring of the stator, the seventh communication port is located on an inner ring of the stator, and the first communication port is located at the center of the stator.

Preferably, the rotor includes a first member and a second member, the first member includes a first port and a second port that are communicated with each other, the second member includes a third port, a fourth port, a fifth port and a sixth port that are communicated with each other, and the sixth port is communicated with the first communication port.

Preferably, the first part is arc-shaped, the arc-shaped length of the first part is equal to the arc-shaped length between any two adjacent communication ports on the stator outer ring, the radian of the first part, the radian of the stator and the radian between any two adjacent communication ports on the stator outer ring are equal, and the distance between the second interface and the third interface is equal to the distance between any two adjacent communication ports on the stator outer ring.

Preferably, the first interface, the second interface and the third interface respectively correspond to the second communication port, the third communication port, the fourth communication port, the fifth communication port and the sixth communication port, and the third interface respectively corresponds to the second communication port and the third communication port.

Preferably, when the rotor is located at a first position, the first port is communicated with the fifth communication port, the second port is communicated with the sixth communication port, the third port is communicated with the second communication port, and the first position is a position between the fifth communication port and the sixth communication port.

At this time, the fluid flows in from the first communication port through the upstream flow path, the first communication port communicates with the sixth port, the sixth port and the third port communicate with each other, and the third port communicates with the second communication port, so that the fluid flows out from the second communication port after flowing in from the first communication port, and does not need to pass through the first chromatography column and the second chromatography column in the middle, and the fluid switching valve is in the through mode.

Preferably, when the rotor is located at a second position, the first port is communicated with the sixth communication port, the second port is communicated with the second communication port, the third port is communicated with the third communication port, and the second position is a position between the sixth communication port and the second communication port.

At this time, the fluid flows in from the first communication port through the upstream flow path, flows through the third port, the third port communicates with the third communication port, the third communication port communicates with the second end of the first chromatography column, so the fluid enters the second end of the first chromatography column through the third communication port, the seventh communication port communicates with the first end of the first chromatography column, so the fluid flows through the first end of the first chromatography column again and enters the switching valve from the seventh communication port, the first port communicates with the sixth communication port due to the communication between the sixth communication port and the seventh communication port, the second port communicates with the second communication port, and the first port and the second port communicate with each other, so the fluid finally flows out from the second communication port after passing through the sixth communication port, and the second communication port communicates with the downstream flow path, the fluid flows to the downstream flow path, and the fluid flows through the first chromatography column from the second end to the first end of the first chromatography column, so that the fluid switching valve is in a reverse flow mode.

Preferably, when the rotor is located at a third position, the first port is communicated with the second communication port, the second port is communicated with the third communication port, the fifth port is communicated with the seventh communication port, and the third position is a position between the second communication port and the third communication port.

At this time, the fluid flows in from the first communication port through the upstream flow path, the first communication port communicates with the sixth port, the sixth port communicates with the fifth port, and the fifth connection port communicates with the seventh communication port, so that the fluid flows into the seventh communication port after flowing into the first communication port, the seventh communication port communicates with the first end of the first chromatography column, and the third communication port communicates with the second end of the first chromatography column, so that the fluid flows into the first end of the first chromatography column after flowing through the seventh communication port, flows into the second end of the first chromatography column, passes through the second end of the first chromatography column, and then flows into the third communication port, at this time, the third communication port communicates with the second port, the fluid enters the second port, and the first port communicates with the second port, therefore, since the fluid flows into the first port from the second port and the first port communicates with the second communication port, the fluid flows into the second communication port from the first port and the second communication port communicates with the downstream flow path, the fluid finally flows out from the second communication port, and the fluid flows through the first chromatography column from the first end to the second end thereof, and thus the fluid switching valve is in the forward flow through first chromatography column mode.

Preferably, when the rotor is located at a fourth position, the first port is communicated with the third communicating port, the second port is communicated with the fourth communicating port, the fourth port is communicated with the seventh communicating port, and the fourth position is a position between the third communicating port and the fourth communicating port.

At this time, since the fluid flows in from the first communication port through the upstream flow path, since the first communication port communicates with the sixth port, the sixth port communicates with the fourth port, and the fourth connection port communicates with the seventh communication port, the fluid flows in the seventh communication port after flowing in the first communication port, the seventh communication port communicates with the first end of the first chromatography column, and the third communication port communicates with the second end of the first chromatography column, so that the fluid flows in the first end of the first chromatography column after flowing through the seventh communication port, flows in the second end of the first chromatography column, passes through the second end of the first chromatography column, and then flows in from the third communication port, and at this time, since the third communication port communicates with the first port, the first port and the second port communicate with each other, thus, fluid flows from the third communication port into the second port, the second port is in communication with the fourth communication port, fluid flows into the fourth communication port through the second port, the fourth communication port is in communication with the first end of the second chromatography column, and the second end of the second chromatography column is in communication with the downstream flow path, such that fluid enters the second chromatography column through the fourth communication port, flows from the second end of the second chromatography column, and flows out through the downstream flow path, and the fluid switching valve is in a series first chromatography column and second chromatography column mode.

Preferably, when the rotor is located at a fifth position, the first port communicates with the fourth communication port, the second port communicates with the fifth communication port, and the fifth position is a position between the fourth communication port and the fifth communication port.

The fifth communication port is communicated with the upstream flow path, and the third port, the fourth port and the fifth port are not communicated with other communication ports, at this time, the fluid flows in from the fifth communication port through the upstream flow path, because the fifth communication port is communicated with the second port, and the first port is communicated with the second port, the fluid enters the first port through the fifth communication port, and the first port is communicated with the fourth communication port, the fluid enters the fourth communication port after passing through the first port, the fourth communication port is communicated with the first end of the second chromatographic column, and the second end of the second chromatographic column is communicated with the downstream flow path, so the fluid flows out from the second end of the second chromatographic column after entering the second chromatographic column through the fourth communication port and through the downstream flow path, at this time, the fluid switching valve is in a mode of flowing through only the second chromatography column.

Has the advantages that: the invention mainly provides a fluid switching valve based on a double chromatographic column, which comprises a stator, a rotor, a first chromatographic column and a second chromatographic column, wherein the stator comprises a first communication port, a second communication port, a third communication port, a fourth communication port, a fifth communication port, a sixth communication port and a seventh communication port, the first communication port and the fifth communication port are respectively communicated with an upstream flow path, the second communication port is communicated with a downstream flow path, the sixth communication port is communicated with the seventh communication port, the seventh communication port is communicated with a first end of the first chromatographic column, the third communication port is communicated with a second end of the first chromatographic column, the fourth communication port is communicated with a first end of the second chromatographic column, a second end of the second chromatographic column is communicated with the downstream flow path, and the rotor comprises a first part and a second part, the first component comprises a first interface and a second interface which are communicated with each other, the second component comprises a third interface, a fourth interface, a fifth interface and a sixth interface which are communicated with each other, and the sixth interface is communicated with the first communication port. The fluid switching valve changes the mutual communication state among the communication ports only by one switching valve and only by rotating the rotor, so that various switching modes of fluid direct connection, forward flow through the first chromatographic column, reverse flow through the first chromatographic column, series connection of the first chromatographic column and the second chromatographic column, flow through the second chromatographic column only and the like can be realized, multiple functions are realized, the cost is effectively saved, the design difficulty of a fluid control system is reduced, and the stability of the fluid control system can be improved.

These and other aspects of the invention are apparent from and will be elucidated with reference to the embodiments described hereinafter.

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 is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a fluid switching valve based on a dual chromatography column according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a rotor of a fluid switching valve based on a dual-chromatography column according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a straight-through mode of a dual chromatography column-based fluid switching valve according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a reverse flow-through first chromatography column mode of a fluid switching valve based on a dual chromatography column according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a forward flow through first chromatography column mode of a fluid switching valve based on a dual chromatography column according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a first chromatography column and a second chromatography column connected in series of a fluid switching valve based on a dual chromatography column according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a flow-through second chromatography column mode of a fluid switching valve based on a dual chromatography column according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Embodiments of the present application will be described below with reference to the accompanying drawings, but the present invention is not limited thereto.

As shown in fig. 1, a schematic structural diagram of a fluid switching valve based on a dual-chromatography column provided in an embodiment of the present invention is shown, where the fluid switching valve specifically includes: the device comprises a stator 7, a rotor 8, a first chromatographic column A and a second chromatographic column B; the stator 7 comprises seven fluid communication ports, namely a first communication port 0, a second communication port 1, a third communication port 2, a fourth communication port 3, a fifth communication port 4, a sixth communication port 5 and a seventh communication port 6; wherein the first communication port 0 and the fifth communication port 4 are in communication with an upstream flow path, the second communication port 1 is in communication with a downstream flow path, the sixth communication port 5 is in communication with the seventh communication port 6, the seventh communication port 6 is in communication 9 with the first end of the first chromatography column a, the third communication port 2 is in communication with the second end 10 of the first chromatography column a, the fourth communication port 3 is in communication with the first end 11 of the second chromatography column B, and the second end 12 of the second chromatography column B is in communication with the downstream flow path.

The embodiment of the invention is mainly applied to the chemical analysis and chemical synthesis automatic system based on continuous flow for fluid control, the double chromatographic columns, namely the first chromatographic column A and the second chromatographic column B, are utilized by rotating the rotor 8, so that the mutual communication state among all fluid communication ports contained in the stator is changed, the functions of changing the direction of fluid, connecting the two chromatographic columns in series, shielding a single chromatographic column, independently using the single chromatographic column, reversely using the chromatographic column and enabling the fluid not to pass through the two chromatographic columns are realized only by one fluid switching valve, the cost can be effectively saved, the flow path design is simplified, the more complicated fluid control function is realized, the design difficulty of a fluid control system is reduced, and the stability of the fluid control system can be improved.

The second communication port 1, the third communication port 2, the fourth communication port 3, the fifth communication port 4, and the sixth communication port 5 are uniformly distributed on an outer ring of the stator 7, the seventh communication port 6 is located on an inner ring of the stator 7, and the first communication port is located at the center of the stator 7. The distances between any two adjacent communication ports of the second communication port 1, the third communication port 2, the fourth communication port 3, the fifth communication port 4, and the sixth communication port 5 are equal to each other.

As shown in fig. 2, for a schematic structural diagram of a rotor of a fluid switching valve based on a dual chromatography column provided in an embodiment of the present invention, the rotor 8 includes a first component and a second component, wherein the first component includes a first port 13 and a second port 14 that are communicated with each other, the second component includes a third port 15, a fourth port 16, a fifth port 17 and a sixth port 18 that are communicated with each other, and the sixth port 18 is communicated with the first communication port 0.

The first part is arc-shaped, the arc length of the first part is equal to the arc length between any two adjacent communication ports on the outer ring of the stator 7, the radian of the first part, the radian of the stator 7 and the radian between any two adjacent communication ports on the outer ring of the stator 7 are equal, and the first interface 13, the second interface 14 and the third interface 15 are equally divided into two parts, namely the second communication port 1, the third communication port 2, the fourth communication port 3, the fifth communication port 4 and the sixth communication port 5, which are corresponding to each other. That is, when the rotor 8 rotates around the center point of the stator 7, i.e., the communication point between the first communication port 0 and the sixth port 18, two ports of the first member of the rotor 8 can always communicate with any adjacent two of the second communication port 1, the third communication port 2, the fourth communication port 3, the fifth communication port 4, and the sixth communication port 5. And the distance between the second port 14 and the third port 15 is equal to the distance between any two adjacent communication ports on the outer ring of the stator 7, the third port 15 corresponds to the second communication port 1 and the third communication port 2, and when the rotor 8 rotates, the third port 15 can be communicated with the second communication port 1 and the third communication port 2 included in the stator 7.

As shown in fig. 3, in order to provide a structural schematic diagram of a straight-through mode of a dual-chromatography column-based fluid switching valve according to an embodiment of the present invention, when the rotor 8 is rotated to be located at a first position between the fifth communication port 4 and the sixth communication port 5, the third port 15 is communicated with the second communication port 1, and the first position is located between the fifth communication port 4 and the sixth communication port 5, it should be noted that when the rotor 8 is located between the fifth communication port 4 and the sixth communication port 5, the first port of the rotor 8 is communicated with the fifth communication port 4, the second port is communicated with the sixth communication port 5, and when the third port 15 is rotated to just reach the second communication port 1, the third port 15 is communicated with the second communication port 1.

At this time, the fluid flows in from the first communication port 0 through the upstream flow path, the fluid flows into the sixth port 18 through the first communication port 0 because the first communication port 0 communicates with the sixth port 18, the fluid flows into the sixth port 18 through the first communication port 0, and the sixth port 18 communicates with the third port 15, so the fluid flows into the third port 15 through the sixth port 18, and at this time, the third port 15 communicates with the second communication port 1, so the fluid flows out through the second communication port 1, the second communication port 1 communicates with the downstream flow path, and finally the fluid flows out from the second communication port 1 to the downstream flow path, and the whole process fluid does not need to pass through the first column a and the second column B, and at this time, the fluid switching valve is in the straight mode.

As shown in fig. 4, in order to provide a schematic structural diagram of a mode of reverse flow through a first chromatography column of a fluid switching valve based on a dual chromatography column according to an embodiment of the present invention, when the fluid switching valve based on a dual chromatography column is used, when the rotor 8 is rotated to be located at a second position, the first port 13 is communicated with the sixth communication port 5, the second port 14 is communicated with the second communication port 1, at this time, the third port 15 is rotated to just reach the third communication port 2, at this time, the third port 15 is communicated with the third communication port 2, and the second position is a position between the sixth communication port 5 and the second communication port 1.

At this time, the fluid flows in from the first communication port 0 through the upstream flow path, the fluid flows into the sixth port 18 through the first communication port 0 because the first communication port 0 communicates with the sixth port 18, the fluid flows into the sixth port 18 through the first communication port 0, and the sixth port 18 communicates with the third port 15, so the fluid flows into the third port 15 through the sixth port 18, the third port 15 communicates with the third communication port 2, the third communication port 2 communicates with the second end 10 of the first column a, so the fluid enters the second end 10 of the first column a through the third communication port 2, the seventh communication port 6 communicates with the first end 9 of the first column a, and the fluid flows into the switching valve from the seventh communication port 6 after flowing through the first end 9 of the first column a again, and the sixth communication port 5 communicates with the seventh communication port 6, the fluid flows into the sixth communication port 5 through the seventh communication port 6, the first port 13 communicates with the sixth communication port 5, the fluid flows into the first port 13 through the sixth communication port 5, the first port 13 and the second port 14 communicate with each other, and the second port 14 communicates with the second communication port 1, so the fluid flows into the second communication port 1 through the first port 13, the second communication port 1 communicates with the downstream flow path, the fluid flows out to the downstream flow path through the second communication port 1, and the fluid flows through the first chromatography column a from the second end 10 of the first chromatography column a to the first end 9 of the first chromatography column a without flowing through the second chromatography column B, so the fluid switching valve is in a reverse flow mode through the first chromatography column a.

As shown in fig. 5, in order to provide a schematic structural diagram of a mode of forward flow through the first chromatography column of the fluid switching valve based on the dual chromatography column according to the embodiment of the present invention, when the rotor 8 is rotated to a third position in which the first port 13 is communicated with the second communication port 1, the second port 14 is communicated with the third communication port 2, the fifth port 17 is communicated with the seventh communication port 6, and the third position is a position between the second communication port 1 and the third communication port 2, when the fluid switching valve based on the dual chromatography column is used.

At this time, since the fluid flows in from the first communication port 0 through the upstream flow path, the first communication port 0 communicates with the sixth port 18, the sixth port 18 communicates with the fifth port 17, and the fifth connection port 17 communicates with the seventh communication port 6, the fluid flows in the first communication port, then flows through the sixth port 18 into the fifth port 17, and then flows in the seventh communication port 6 through the fifth port 17; since the seventh communication port 6 communicates with the first end 9 of the first chromatography column a and the third communication port 2 communicates with the second end 10 of the first chromatography column a, the fluid flows through the seventh communication port 6, enters the first end 9 of the first chromatography column a, flows to the second end 10 of the first chromatography column a, passes through the second end 10 of the first chromatography column a, enters the third communication port 2, at this time, the third communication port 2 communicates with the second port 14, the fluid enters the second port 14, and since the first port 13 and the second port 14 are in communication with each other, the fluid flows from the second port 14 into the first port 13, and the first port 13 communicates with the second communication port 1, the fluid flows from the first port 13 into the second communication port 1, and the second communication port 1 communicates with the downstream flow path, therefore, the fluid finally flows out from the second communication port 1 to the downstream channel, and when the fluid flows through the first chromatography column a, the fluid flows from the first end 9 of the first chromatography column a to the second end 10 of the first chromatography column a, and therefore, at this time, the fluid switching valve is in the forward flow first chromatography column a mode.

As shown in fig. 6, in order to provide a schematic structural diagram of a serial connection mode of a first chromatography column and a second chromatography column of a fluid switching valve based on a double chromatography column according to an embodiment of the present invention, when the fluid switching valve based on a double chromatography column is used, when the rotor 8 is rotated to be located at a fourth position, the first port 13 is communicated with the third communication port 2, the second port 14 is communicated with the fourth communication port 3, the fourth port 16 is communicated with the seventh communication port 6, and the fourth position is a position between the third communication port 2 and the fourth communication port 3.

At this time, since the fluid flows in from the first communication port 0 through the upstream flow path, the first communication port 0 communicates with the sixth port 18, the sixth port 18 communicates with the fourth port 16, and the fourth connection port 16 communicates with the seventh communication port 6, the fluid flows in the first communication port 0, then flows through the sixth port 18, then flows into the fourth port 16, then flows into the seventh communication port 6 via the fourth port 16, the seventh communication port 6 communicates with the first end 9 of the first column a, and the third communication port 2 communicates with the second end 10 of the first column a, the fluid flows in the first end 9 of the first column a via the seventh communication port, then flows in the second end 10 of the first column a, then flows in the third communication port 2 via the second end 10 of the first column a, at this time, since the third communication port 2 communicates with the first port 13, the first port 13 and the second port 14 communicate with each other, therefore, the fluid flows into the second port 14 from the third communication port 2, at which time the second port 14 is communicated with the fourth communication port 3 again, so that the fluid flows into the fourth communication port 3 through the second port 14, and the fourth communication port 3 communicates with the first end 11 of the second chromatography column B, the second end 12 of the second chromatography column B communicates with the downstream flow path, therefore, after the fluid enters the second chromatographic column B through the fourth communication port 3, the fluid flows from the second end 12 of the second chromatographic column B, and flows out to the downstream flow path, and at this time, the fluid in the fluid switching valve needs to flow through the first chromatographic column A and the second chromatographic column B simultaneously, and is in a series connection first chromatographic column and second chromatographic column mode.

As shown in fig. 7, in order to provide a schematic structural diagram of a flow-through second chromatography column mode of a fluid switching valve based on a dual chromatography column according to an embodiment of the present invention, when the fluid switching valve based on a dual chromatography column is used, when the rotor 8 is rotated to be located at a fifth position, the first port 13 is communicated with the fourth communication port 3, the second port 14 is communicated with the fifth communication port 4, and the fifth position is a position between the fourth communication port 3 and the fifth communication port 4.

In this case, since the fluid flows from the fifth communication port 4 through the upstream flow path, the fifth communication port 4 communicates with the second port 14, and the first port 13 communicates with the second port 14, the fluid enters the first port 13 through the fifth communication port 4, the first port 13 communicates with the fourth communication port 3 through the first port 13, the fluid enters the fourth communication port 3 through the fourth communication port 3 communicates with the first end 11 of the second column B, the second end 12 of the second column B communicates with the downstream flow path, and the fluid enters the second column B through the fourth communication port 3 and then passes through the second end 12 of the second column B, and flows out to the downstream flow path, and at this time, the fluid of the fluid switching valve flows through only the second chromatography column B, and shields the first chromatography column a, and the fluid switching valve is in a mode of flowing through only the second chromatography column.

Has the advantages that: the invention mainly provides a fluid switching valve based on a double chromatographic column, which comprises a stator, a rotor, a first chromatographic column and a second chromatographic column, wherein the stator comprises a first communication port, a second communication port, a third communication port, a fourth communication port, a fifth communication port, a sixth communication port and a seventh communication port, the first communication port and the fifth communication port are respectively communicated with an upstream flow path, the second communication port is communicated with a downstream flow path, the sixth communication port is communicated with the seventh communication port, the seventh communication port is communicated with a first end of the first chromatographic column, the third communication port is communicated with a second end of the first chromatographic column, the fourth communication port is communicated with a first end of the second chromatographic column, a second end of the second chromatographic column is communicated with the downstream flow path, and the rotor comprises a first part and a second part, the first component comprises a first interface and a second interface which are communicated with each other, the second component comprises a third interface, a fourth interface, a fifth interface and a sixth interface which are communicated with each other, and the sixth interface is communicated with the first communication port. The fluid switching valve changes the mutual communication state among the communication ports only by one switching valve and only by rotating the rotor, so that the fluid can directly pass through, positively flow through the first chromatographic column, reversely flow through the first chromatographic column, serially connect the first chromatographic column and the second chromatographic column, shield the first chromatographic column and other switching modes, and realize multiple functions, thereby effectively saving the cost, reducing the design difficulty of a fluid control system and simultaneously improving the stability of the fluid control system.

The foregoing detailed description of the embodiments of the present invention has been presented for the purpose of illustrating the principles and implementations of the present invention, and the description of the embodiments is only provided to assist understanding of the core concepts of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.