CN216843244U - Rotary valve and chromatographic experiment system with same - Google Patents
Rotary valve and chromatographic experiment system with same Download PDFInfo
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- CN216843244U CN216843244U CN202123000239.3U CN202123000239U CN216843244U CN 216843244 U CN216843244 U CN 216843244U CN 202123000239 U CN202123000239 U CN 202123000239U CN 216843244 U CN216843244 U CN 216843244U
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Abstract
The utility model discloses a rotary valve and a chromatography experiment system with the rotary valve, wherein a second valve body of the rotary valve can rotate relative to a first valve body, N groups of interface units are arranged on the first valve body to realize communication with N chromatography columns, the second valve body can be reasonably rotated to selectively conduct the communication between one chromatography column and external detection equipment, the reverse flow of the chromatography column can be realized by rotating the second valve body by a preset angle on the basis of the position, and in addition, when the second valve body is positioned at a specific position, an inlet and an outlet of the first valve body can be directly conducted without passing through the chromatography column, so that a bypass function is realized. Not only can realize system's bypass, positive current, palirrhea realization through rotating the second valve body in this application, can realize being connected of system and many chromatography columns moreover, simple structure, easily operation, and can reduce cost. And, the annular runner that sets up on the second valve body can avoid some fluid to be detained in the rotary valve runner inside, and fluid flow is more smooth and easy.
Description
Technical Field
The utility model relates to the technical field of fluid equipment, in particular to a rotary valve and a chromatography experimental system with the same.
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 by a chromatography apparatus, it is generally necessary to realize bypass, forward flow, and reverse flow paths by using a plurality of valves. For a complex chromatography experimental system, when a plurality of chromatography columns exist in the system, one of the chromatography columns needs to be selectively conducted according to experimental conditions. How to simplify the structure of the chromatography experimental system is a technical problem that those skilled in the art are always concerned about.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a rotary valve which is suitable for multi-column analysis and has a simple structure. Another object of the present invention is to provide a chromatography experimental system comprising the above rotary valve.
The utility model provides a rotary valve, which comprises a first valve body and a second valve body which can rotate relatively; the second valve body is at least partially positioned inside the first valve body;
the first valve body is provided with an inlet, an outlet and N groups of interface units, and each interface unit comprises a first interface and a second interface;
The first valve body and the second valve body are respectively provided with a first surface and a second surface which are opposite and in dynamic sealing fit; the second surface is provided with an annular flow passage and a radial flow passage communicated with the annular flow passage, a first auxiliary flow passage independent from the annular flow passage is further arranged in the second valve body, and communication ports at two ends of the first auxiliary flow passage are located on the second surface; the first surface is provided with openings which are communicated with the inlet and the outlet of the first valve body and the first interface and the second interface of each interface unit in a one-to-one opposite mode; the first surface is also provided with a second auxiliary flow channel;
the second valve body can rotate to 2N +1 positions relative to the first valve body, and the second valve body is sequentially a zero position, a first position, … … and an Nth position … … and a 2 Nth position along the circumferential direction;
when the second valve body is positioned at a zero position, an opening corresponding to the inlet of the first valve body is directly communicated with an opening corresponding to the outlet through the first auxiliary flow passage and the second auxiliary flow passage;
when the second valve body is located at the Nth position, the opening corresponding to the first port of the Nth interface unit is communicated with the opening corresponding to the inlet through the first auxiliary flow passage, and the opening corresponding to the second port of the Nth interface unit is communicated with the outlet through the annular flow passage and the radial flow passage; when the second valve body rotates for a preset angle from the Nth position, the opening corresponding to the second interface of the Nth interface unit is communicated with the inlet through the first auxiliary flow channel, and the opening corresponding to the first interface of the Nth interface unit is communicated with the opening corresponding to the first surface of the outlet through the annular flow channel and the radial flow channel.
The utility model discloses a second valve body of rotary valve can rotate first valve body relatively, through set up N group interface unit at first valve body and realize the intercommunication with N chromatography columns, rationally rotate second valve body and can selectively switch on the intercommunication of one of them chromatography column and external detection equipment, and rotate predetermined angle just can realize the backward flow of this chromatography column when the second valve body on this position basis, when the second valve body is located specific position in addition, the import and the export of first valve body can directly switch on through not passing through the chromatography column, realize the bypass function. Not only can realize system's bypass, positive current, palirrhea realization through rotating the second valve body in this application, can realize being connected of system and many chromatography columns moreover, simple structure, easily operation, and can reduce cost.
And, the annular runner that sets up on the second valve body can avoid some fluid to be detained in the rotary valve runner inside, and fluid flow is more smooth and easy.
Optionally, the annular flow channel is an annular groove, and the outlet is opposite to the notch of the annular groove.
Optionally, the first port and the second port of each port unit are arranged in a manner of being equal in diameter in each opening on the first surface, and each opening is located in a region where the first surface is located inside the circular groove, or each opening is located in a region where the first surface is located outside the circular groove.
Optionally, two openings communicating with the first port and the second port of the same interface unit are symmetrically arranged about the center of the first face.
Optionally, two openings corresponding to the inlet and the outlet on the first surface are a first opening and a second opening, respectively, one of the first opening and the second opening is located at the center of the first surface, and a distance from the other one of the first opening and the second opening to a central axis of the first surface is not equal to a distance from each opening corresponding to the interface unit to the central axis of the first surface.
Optionally, one of the two communication ports of the first auxiliary flow channel on the second surface is located at the center of the second surface, and the other communication port is located at the periphery of the annular flow channel.
Optionally, a communication port of the first auxiliary flow passage located at the center of the second surface is an oblong hole, and a projection of the oblong hole in a plane perpendicular to the rotation axis covers a projection of the first opening in a plane perpendicular to the rotation axis.
Optionally, the second auxiliary flow passage is a groove extending in the radial direction, and an opening of the outlet on the first surface is opened at a groove bottom of the groove.
Optionally, the number of the interface units is greater than or equal to 2.
In addition, the utility model also provides a chromatography experiment system, which comprises detection equipment, a pumping part, at least two chromatography columns and the rotary valve, wherein a first working port and a second working port of one chromatography column are respectively connected with a first interface and a second interface of an interface unit of the rotary valve, and an inlet and an outlet of the first valve body are respectively communicated with the pumping part and the detection equipment.
Drawings
FIG. 1 is a schematic illustration of a rotary valve in a bypass state according to an embodiment of the present invention; the figure shows a perspective view of the main structure of the rotary valve, wherein the dotted line is the main structure of the second valve body;
FIG. 2 is a schematic diagram showing the connections of the interfaces when a first interface unit of the chromatography experimental system flows in a first direction;
FIG. 3 shows a schematic connection diagram of the interfaces of a first interface unit of a chromatography experimental system flowing in the opposite direction to the first direction;
FIG. 4 is a schematic diagram of a chromatography experimental system in a bypass state according to an embodiment of the present invention;
FIG. 5 is a perspective schematic view of a first valve body of the present invention;
FIG. 6 is a three-dimensional schematic view of a second valve body according to an embodiment of the utility model;
FIG. 7 is a schematic view of a second face of the second valve body in one embodiment of the utility model.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
Please refer to fig. 1 to fig. 7, wherein fig. 1 and fig. 5 are perspective structural diagrams. The utility model provides a chromatography experimental system, which at least comprises a detection device 5, a pumping part 4 and a rotary valve. 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 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 motive force for the flow of sample liquid in the chromatography experimental system.
The utility model provides a rotary valve which comprises a first valve body 1 and a second valve body 2 which can rotate relatively, namely, the second valve body 2 can rotate around the central axes of the first valve body and the second valve body. The second valve body 2 is at least partially located inside the first valve body 1 in this application, and the first valve body 1 has the inner chamber promptly, and the second valve body 2 can be partially or totally located the inner chamber of first valve body 1, the cooperation of circumference of first valve body 1 and second valve body 2 rotates. The outer shapes of the first valve body 1 and the second valve body 2 can be designed according to needs, and are not particularly limited herein.
In this embodiment the first valve body 1 is provided with an inlet 1a 'and an outlet 1 b', the inlet 1a 'of the first valve body 1 being adapted for connection to the pumping member 4 and the outlet 1 b' being adapted for connection to an inlet of the detection device 5.
Furthermore, the first valve body 1 is further provided with at least N sets of interface units, each interface unit comprises a first interface and a second interface which are arranged on the first valve body 1, and one interface unit can be connected with one chromatographic column, namely, a first working port and a second working port of one chromatographic column can be respectively connected with the first interface and the second interface of one interface unit. The inlet 1a ', the outlet 1 b' and the interfaces of the interface units may be disposed at suitable positions on the outer surface of the first valve body 1, as long as reliable connection with other components is possible, and the interfaces of the interface units may be identified for the reliability of the connection pipeline and the improvement of the connection efficiency.
In the application, the first valve body 1 is provided with a first surface 1-1, the second valve body 2 is provided with a second surface 2-1, the first surface 1-1 and the second surface 2-1 are opposite and in dynamic sealing fit, and when the second valve body 2 rotates relative to the first valve body 1, the second surface 2-1 can act relative to the first surface 1-1. The second surface 2-1 is provided with an annular flow passage 21 and a radial flow passage 23, wherein the annular flow passage 21 is communicated with the radial flow passage 23. The second valve body 2 is further provided with a first auxiliary flow passage 22 independent of the annular flow passage 21, and communication ports at both ends of the first auxiliary flow passage 22 are located on the second surface 2-1, that is, the first auxiliary flow passage 22 is located inside the second valve body 2 except for the communication ports located on the second surface 2-1, and a flow path of a medium is not opened on the second surface 2-1. The two communication ports are defined as a first communication port 2a and a second communication port 2b, respectively.
In this embodiment, the first surface 1-1 is provided with openings which are respectively communicated with the inlet 1a 'and the outlet 1 b' of the first valve body 1 and the first interface and the second interface of each interface unit. Referring to fig. 1 to 5, the port 11 'is connected to the port 12' through the first flow channel connection opening 11, the port 12 'is connected to the port 12' through the second flow channel connection opening 12, the port 13 'is connected to the port 13' through the third flow channel connection opening 13, the port 14 'is connected to the port 14' through the fourth flow channel connection opening 14, the port 15 'is connected to the port 15' through the fifth flow channel connection opening 15, the port 16 'is connected to the port 16 through the sixth flow channel connection opening 16, the port 17' is connected to the port 17 'through the seventh flow channel connection opening 17, the port 18' is connected to the port 18 through the eighth flow channel connection opening 18, the port 19 outlet 'is connected to the port 19 through the ninth flow channel connection opening 19, the port 20' is connected to the port 20 through the tenth flow channel connection opening 20, and the inlet 1a 'is connected to the first opening 1a through the eleventh flow channel connection opening and the second opening 1 b' is connected to the twelfth flow channel connection opening 1 b. The first flow channel to the twelfth flow channel can have the same structure or different structures.
The first to twelfth flow passages may have the same structure, for example, all the flow passages 1c have the structure shown, but of course, the structures may also be different.
The first face 1-1 in this embodiment is also provided with a second auxiliary flow passage 1 d.
The second valve body 2 can rotate to 2N +1 positions relative to the first valve body 1, and is sequentially a zero position, a first position, … … and an Nth position … … and a 2 Nth position along the circumferential direction; wherein N is a natural number greater than or equal to 2. The number of interface units may be greater than or equal to 2. In one example, 5 sets of interface units, i.e. 10 interfaces, 5 first interfaces and 5 second interfaces, are provided on the first valve body 1, and the first interface unit, the second interface unit, the third interface unit, the fourth interface unit and the fifth interface unit are defined clockwise by taking fig. 1 as an example, wherein the first interface unit includes an interface 11 'and an interface 15', the second interface unit includes interfaces 12 'and 16', the third interface unit includes interfaces 13 'and 17', the fourth interface unit includes interfaces 14 'and 18', and the fifth interface unit includes interfaces 19 'and 20'. One of the two interfaces of each interface unit is a first interface, and the other interface is a second interface. Of course, the number of the ports on the first valve body 1 is not limited to that described herein, and may be other numbers as long as it is sufficient to connect at least two chromatography columns.
Before the rotary valve is used, pipelines are used for communicating an inlet of a first valve body 1 of the rotary valve with an outlet of a pumping part 4, pipelines are used for communicating an outlet of the first valve body 1 with an inlet of a detection device 5, and pipelines are used for communicating a first working port and a second working port of each chromatographic column with a first interface and a second interface of a corresponding interface unit.
When the second valve body 2 is located at the zero position, the opening corresponding to the inlet 1a 'of the first valve body 1 on the first surface 1-1 is directly communicated with the opening corresponding to the outlet 1 b' through the first auxiliary flow passage 22 and the second auxiliary flow passage 1d, and the flow passage directions are as follows: the inlet 1a '→ the first opening 1a → the first auxiliary flow passage 22 → the second auxiliary flow passage 1d → the second opening 1b → the outlet 1 b'.
When the second valve body 2 is located at the nth position, the opening corresponding to the first port of the nth port unit is communicated with the opening corresponding to the inlet through the first auxiliary flow passage 22, and the opening corresponding to the second port of the nth port unit is communicated with the outlet through the annular flow passage 21 and the radial flow passage 23; taking the first interface unit as an example, the flow path direction is: the inlet 1a '→ the first opening 1a → the first auxiliary flow passage 22 → the opening 11 → the interface 11' → the chromatographic column → the interface 15 '→ the opening 15 → the radial flow passage 23 → the annular flow passage 21 → the second opening 1b → the outlet 1 b'.
When the second valve body 2 rotates a predetermined angle from the nth position, the opening corresponding to the second port of the nth port unit is communicated with the inlet through the first auxiliary flow channel 22, and the opening corresponding to the first port of the nth port unit is communicated with the opening corresponding to the outlet on the first surface 1-1 through the annular flow channel 21 and the radial flow channel 23. Taking the first interface unit as an example, the flow path direction is: the inlet 1a '→ the first opening 1a → the first auxiliary flow passage 22 → the opening 15 → the interface 15' → the chromatographic column → the interface 11 '→ the opening 11 → the radial flow passage 23 → the annular flow passage 21 → the second opening 1b → the outlet 1 b'.
Similarly, when the second valve body 2 rotates to the second position, the port 12 and the port 16 of the second port unit communicate the inlet and the outlet through the internal flow passages of the first valve body 1 and the second valve body 2; after rotating 180 degrees from the second position, the port 12 and the port 16 of the second port unit are communicated with the outlet and the inlet through the internal flow passages of the first valve body 1 and the second valve body 2, so that the fluid flows in the forward direction and the reverse direction.
By analogy, the forward and reverse flows of the other interface units are the same as the action principle of the second valve body 2.
The second valve body 2 of the rotary valve disclosed in the application can rotate relative to the first valve body 1, through set up N group interface unit at first valve body 1 and realize the intercommunication with a N chromatographic column, rationally rotate second valve body 2 and can selectively switch on one of them chromatographic column and external detection equipment 5's intercommunication, and rotate predetermined angle and just can realize the reverse flow of this chromatographic column when second valve body 2 on this position basis, when second valve body 2 is located the particular position in addition, the import and the export of first valve body 1 can directly switch on through not passing through the chromatographic column, realize the bypass function. Not only can realize the realization of system bypass, positive current, palirrhea through rotating second valve body 2 in this application, can realize being connected of system and many chromatography columns moreover, simple structure, easily operation, and can reduce cost.
The annular flow passage 21 provided in the second valve body 2 can prevent part of the fluid from remaining in the flow passage of the rotary valve, and the fluid can flow more smoothly.
In the above embodiment, the annular flow passage 21 may be an annular groove, but may also be a non-annular groove. The corresponding opening (second opening 1b) of the outlet of the first valve body 1 on the first surface 1-1 is opposite to the notch of the circular groove. The notch can completely cover the second opening 1 b.
The circular groove has simple structure and is easy to process.
The first interface and the second interface of each interface unit are arranged in a way that the openings on the first surface 1-1 are in the same diameter, and each opening is positioned in the area of the first surface 1-1, which is positioned in the circular groove, or each opening is positioned in the area of the first surface 1-1, which is positioned outside the circular groove. The first port and the second port of each port unit are shown in the figure with the respective openings in the first side 1-1 in the area outside the circular groove, i.e. with the respective openings having a radius larger than the outer diameter of the circular groove, outside the circular groove. The first auxiliary flow passage 22 can communicate with the openings from the inside of the second valve body across the annular groove.
In a specific example, two openings communicating with the first and second ports of the same interface unit are symmetrically arranged about the center of the first face 1-1. Therefore, the forward flow path and the reverse flow path can be switched by rotating the rotary valve by 180 degrees, and the design of the flow passage in the valve body is simpler.
As described above, the two openings corresponding to the inlet and the outlet on the first surface 1-1 are the first opening 1a and the second opening 1b, respectively, one of the first opening 1a and the second opening 1b is located at the center of the first surface 1-1, and the distance from the other one of the first opening 1a and the second opening 1b to the central axis of the first surface 1-1 is not equal to the distance from each opening corresponding to the interface unit to the central axis of the first surface 1-1, so that the layout of each opening on the first surface 1-1 is reasonable, and it is convenient to arrange a plurality of sets of openings of the interface unit on the first surface 1-1. The figure shows that the first opening 1a is located in the centre of the first side 1-1, the second opening 1b is located at a distance R1 from the centre, and the openings opposite the interface elements are arranged on a circle with a radius R2.
In the above embodiment, one of the two communication ports of the first auxiliary flow passage 22 on the second face 2-1 is located at the center of the second face 2-1, and the other is located at the periphery of the annular flow passage 21. The first auxiliary flow passage 22 is directly opposed to the first opening 1 a.
In this embodiment, the communication opening of the first auxiliary flow passage 22 located at the center of the second face 2-1 may be an oblong hole, and a projection of the oblong hole in a plane perpendicular to the rotation axis covers a projection of the first opening 1a in a plane perpendicular to the rotation axis. In this way, the flow surface of the communication opening of the first auxiliary flow passage 22 is larger than the flow surface of the first opening, which is advantageous for ensuring that the fluid entering from the first opening 1a smoothly flows into the first auxiliary flow passage 22.
In the above embodiments, the second auxiliary flow passage 1d is a groove extending in the radial direction, and the second opening 1b is opened at the bottom of the groove. The flow channel setting mode has a simple structure.
As mentioned above, the chromatography experimental system may further comprise at least two chromatography columns 3 and any one of the above-mentioned rotary valves, wherein the first working port and the second working port of one chromatography column are respectively connected to the first interface and the second interface 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 component 4 and the detection device 5.
The chromatographic test system of the present invention has the rotary valve described in any of the above embodiments, and therefore the chromatographic test system also has the above-described technical effects of the rotary valve.
The rotary valve and the chromatography experimental system with the rotary valve provided by the utility model are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A rotary valve characterized by comprising a first valve body and a second valve body which are relatively rotatable; the second valve body is at least partially positioned inside the first valve body;
the first valve body is provided with an inlet, an outlet and N groups of interface units, wherein each interface unit comprises a first interface and a second interface;
the first valve body and the second valve body are respectively provided with a first surface and a second surface which are opposite and in dynamic sealing fit; the second surface is provided with an annular flow passage and a radial flow passage communicated with the annular flow passage, a first auxiliary flow passage independent of the annular flow passage is further arranged in the second valve body, and communication ports at two ends of the first auxiliary flow passage are located on the second surface; the first surface is provided with openings which are communicated with the inlet and the outlet of the first valve body and the first interface and the second interface of each interface unit in a one-to-one opposite mode; the first surface is also provided with a second auxiliary flow channel;
the second valve body can rotate to 2N +1 positions relative to the first valve body, and the second valve body is sequentially a zero position, a first position, … … and an Nth position … … and a 2 Nth position along the circumferential direction;
when the second valve body is positioned at a zero position, an opening corresponding to the inlet of the first valve body is directly communicated with an opening corresponding to the outlet through the first auxiliary flow passage and the second auxiliary flow passage;
When the second valve body is located at the Nth position, the opening corresponding to the first port of the Nth interface unit is communicated with the opening corresponding to the inlet through the first auxiliary flow passage, and the opening corresponding to the second port of the Nth interface unit is communicated with the outlet through the annular flow passage and the radial flow passage; when the second valve body rotates for a preset angle from the Nth position, the opening corresponding to the second interface of the Nth interface unit is communicated with the inlet through the first auxiliary flow channel, and the opening corresponding to the first interface of the Nth interface unit is communicated with the opening corresponding to the first surface through the annular flow channel and the radial flow channel.
2. The rotary valve as claimed in claim 1 wherein said annular flow passage is an annular groove and said outlet is opposite a notch of said annular groove.
3. The rotary valve of claim 2, wherein the first and second ports of each port unit are arranged with equal diameters at each opening in the first face, each opening being in an area of the first face that is inside the annular groove, or each opening being in an area of the first face that is outside the annular groove.
4. A rotary valve as claimed in claim 3, wherein two openings communicating with the first and second ports of the same port unit are arranged symmetrically about the centre of the first face.
5. The rotary valve according to claim 3, wherein the two openings corresponding to the inlet and the outlet on the first surface are a first opening and a second opening, respectively, one of the first opening and the second opening is located at the center of the first surface, and the distance from the other opening to the central axis of the first surface is not equal to the distance from each opening corresponding to the interface unit to the central axis of the first surface.
6. The rotary valve as claimed in claim 5, wherein said first auxiliary flow passage has two communication ports on said second face, one of which is located at a center of said second face and the other of which is located at an outer periphery of said annular flow passage.
7. The rotary valve according to claim 6, wherein the communication port of the first auxiliary flow passage at the center of the second face is an oblong hole, and a projection of the oblong hole in a plane perpendicular to the rotation axis covers a projection of the first opening in a plane perpendicular to the rotation axis.
8. A rotary valve as claimed in any one of claims 1 to 7 wherein said second auxiliary flow passage is a radially extending groove, the opening of said outlet in said first face opening to the base of said groove.
9. A rotary valve as claimed in any one of claims 1 to 7 wherein the number of interface units is 2 or greater.
10. A chromatography experimental system, comprising a detection device and a pumping component, and further comprising at least two chromatography columns and a rotary valve according to any one of claims 1 to 9, wherein a first working port and a second working port of one chromatography column are respectively connected with a first interface and a second interface of an interface unit of the rotary valve, and an inlet and an outlet of the first valve body are respectively communicated with the pumping component and the detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123000239.3U CN216843244U (en) | 2021-11-30 | 2021-11-30 | Rotary valve and chromatographic experiment system with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123000239.3U CN216843244U (en) | 2021-11-30 | 2021-11-30 | Rotary valve and chromatographic experiment system with same |
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| Publication Number | Publication Date |
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| CN216843244U true CN216843244U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123000239.3U Active CN216843244U (en) | 2021-11-30 | 2021-11-30 | Rotary valve and chromatographic experiment system with same |
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| CN (1) | CN216843244U (en) |
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2021
- 2021-11-30 CN CN202123000239.3U patent/CN216843244U/en active Active
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