Selector valve

Abstract

The utility model relates to a selector valve which comprises a first valve body, the end face of the first valve body is provided with a liquid inlet groove, a liquid outlet groove and an extension groove, the extension groove is communicated with the liquid outlet groove, the liquid outlet groove comprises a first end and a second end, and a liquid feeding path of the liquid inlet groove and a liquid feeding path of the extension groove are located on the same straight line; the first valve body and the second valve body can rotate relatively, the second valve body comprises a liquid outlet hole, a liquid inlet hole and a plurality of groups of passages, each group of passages comprises two end holes, a connecting line of the two end holes in each group of passages passes through the liquid inlet hole, and an included angle formed by connecting lines between the two end holes located on the two sides of the liquid outlet hole in the circumferential direction and the liquid inlet hole is a first included angle; the end, close to the liquid inlet hole, of the liquid inlet groove is a third end, an included angle formed by connecting lines between the first end and the third end and between the second end and the third end is a second included angle, and the first included angle is larger than or equal to the second included angle. According to the selector valve, bidirectional flowing of liquid can be completed, and therefore the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to a selection valve. Background Art

[0002] In the fields of protein purification, nucleic acid synthesis, liquid chromatography, etc., columns are the main devices for purifying, synthesizing or differentiating analytes. During the experiment, a selection valve enables liquid to pass through different columns, so as to achieve the purposes of purifying, synthesizing or differentiating analytes. The current selection valve includes multiple groups of passages respectively corresponding to multiple columns. The two ends of the passage are a first port and a second port respectively, and the first port and the second port are communicated with the column. By rotating the selection valve, the liquid can enter different passages, so as to realize the function of the liquid entering different columns. The current selection valve can only complete the liquid entering the passage from the first port, but cannot complete the liquid entering the passage from the second port, resulting in low test efficiency. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the utility model is to provide a selection valve that can complete the bidirectional flow of liquid, thereby improving the test efficiency and meeting more complex process requirements.

[0004] To solve the above technical problem, the utility model provides a selection valve, including: a first valve body, the first valve body is provided with a liquid inlet groove, a liquid outlet groove and an extension groove, the extension groove is communicated with the liquid outlet groove, the liquid outlet groove includes a first end and a second end located at both ends of the liquid outlet groove, the liquid inlet groove is located between the first end and the second end, and the liquid delivery path of the liquid inlet groove and the liquid delivery path of the extension groove are on the same straight line; a second valve body, the first valve body and the second valve body can rotate relatively, the second valve body includes a liquid outlet hole, a liquid inlet hole and multiple pairs of end holes. In the working state, the liquid outlet hole can be located on the liquid delivery path of the liquid outlet groove, and the liquid inlet hole is located on the liquid delivery path of the liquid inlet groove. Multiple end holes can be located on the liquid delivery paths of the extension groove and the liquid inlet groove. The two end holes in each pair of end holes are arranged radially opposite to each other. The included angle formed by the connection lines between the two end holes located on both sides of the liquid outlet hole in the circumferential direction and the liquid inlet hole is a first included angle. The end of the liquid inlet groove communicated with the liquid inlet hole is a third end. The included angles formed by the connection lines between the first end and the second end and the third end respectively are second included angles. The first included angle is greater than or equal to the second included angle.

[0005] In an embodiment of the utility model, the extension groove extends from the liquid outlet groove towards the direction close to the edge of the first valve body, and multiple end holes are located between the liquid delivery path of the liquid outlet groove and the edge of the second valve body.

[0006] In an embodiment of the present utility model, the multiple pairs of the end holes include a first end hole, a second end hole, a third end hole, and a fourth end hole, wherein the first end hole and the second end hole form a pair, and the third end hole and the fourth end hole form a pair. When the first valve body and the second valve body rotate relative to each other such that both the liquid inlet hole and the liquid outlet hole are located on the liquid delivery path of the liquid inlet groove, the first end hole is radially aligned with the first end portion, the fourth end hole is radially aligned with the second end portion, the liquid inlet hole is located on the rotation axis, and the liquid outlet hole is circumferentially located between the adjacent first end hole and the fourth end hole.

[0007] In an embodiment of the present utility model, the included angle formed by the connecting lines of the first end hole located on one side of the liquid outlet hole and the liquid outlet hole with the liquid inlet hole respectively is a third included angle, and the included angle between the connecting line between the second end portion and the third end portion and the liquid delivery path of the liquid inlet groove is a fourth included angle, and the third included angle is greater than or equal to the fourth included angle.

[0008] In an embodiment of the present utility model, the included angle formed by the connecting lines of the fourth end hole located on the other side of the liquid outlet hole and the liquid outlet hole with the liquid inlet hole respectively is a fifth included angle, and the included angle between the connecting line between the first end portion and the third end portion and the liquid delivery path of the liquid inlet groove is a sixth included angle, and the fifth included angle is greater than or equal to the sixth included angle.

[0009] In an embodiment of the present utility model, at least one end hole is further provided between the first end hole and the third end hole, and the included angle formed by the connecting lines of any two adjacent end holes between the first end hole and the third end hole with the liquid inlet hole respectively is a seventh included angle, and the seventh included angle is smaller than the first included angle.

[0010] In an embodiment of the present utility model, the connecting line of the liquid inlet hole and the liquid outlet hole is located at the middle position between the first end hole and the fourth end hole, and the liquid delivery path of the liquid inlet groove is located at the middle position between the first end portion and the second end portion.

[0011] In an embodiment of the present utility model, the liquid outlet groove is in an arc shape with the third end portion as the axis.

[0012] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0013] A selection valve according to the present utility model enables the liquid inlet groove and the extension groove to correspond to different groups of end holes through the relative rotation of the first valve body and the second valve body, so that after the liquid enters the liquid inlet groove from the liquid inlet hole, it can enter different end holes, then flow out from another end hole in the same group as the entered end hole, and finally flow into the liquid outlet hole through the liquid outlet groove. By setting the first angle to be greater than or equal to the second angle, both of the two end holes in a group can serve as inlets for liquid inflow and also as outlets for liquid outflow, and the outflowing liquid can all enter the liquid outlet groove, thereby realizing the two-way flow of liquid in the passage formed by the two end holes in a group, improving the test efficiency and meeting more complex process requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model in conjunction with the attached drawings, where

[0015] Figure 1 is a schematic structural view of the first valve body in a selection valve of the present utility model;

[0016] Figure 2 is a schematic structural view of the second valve body;

[0017] Figure 3 is a schematic view of the mating structure of the first valve body and the second valve body;

[0018] Figure 4 is a top view of the first valve body;

[0019] Figure 5 is a top view of the second valve body;

[0020] Figure 6 is a schematic view of the mating structure of the first valve body and the second valve body;

[0021] Figure 7 is a schematic view of the mating structure of the first valve body and the second valve body.

[0022] Explanation of the reference numerals in the drawings of the specification: 1. First valve body; 2. Second valve body; 11. Liquid outlet groove; 12. Extension groove; 13. First end; 14. Second end; 15. Liquid inlet groove; 16. Sixth angle; 17. Fourth angle; 18. Second angle; 21. Liquid inlet hole; 22. Liquid outlet hole; 23. First end hole; 24. Second end hole; 25. Third end hole; 26. Fourth end hole; 27. Fifth end hole; 28. Sixth end hole; 29. First angle; 151. Third end; 152. Fourth end; 221. Third angle; 261. Fifth angle; 271. Seventh end hole; 272. Ninth end hole; 273. Seventh angle; 281. Eighth end hole; 282. Tenth end hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it. However, the embodiments cited do not limit the present utility model.

[0024] Referring to Figure 1 and Figure 2 As shown, a selection valve of the present utility model includes: a first valve body 1, an end face of the first valve body 1 is provided with a liquid inlet groove 15, a liquid outlet groove 11 and an extension groove 12, the extension groove 12 communicates with the liquid outlet groove 11, the liquid outlet groove 11 includes a first end 13 and a second end 14 located at both ends of the liquid outlet groove 11, the liquid inlet groove 15 is located between the first end 13 and the second end 14, and a liquid delivery path of the liquid inlet groove 15 and a liquid delivery path of the extension groove 12 are on the same straight line; a second valve body 2, the first valve body 1 and the second valve body 2 can rotate relative to each other, the second valve body 2 includes a liquid outlet hole 22, a liquid inlet hole 21 and multiple groups of passages, each group of passages includes a pair of end holes, in a working state, the liquid outlet hole 22 can be located on the liquid delivery path of the liquid outlet groove 11, and the liquid inlet hole 21 is located on the liquid delivery path of the liquid inlet groove 15, two end holes in each group of passages can both be located on the liquid delivery paths of the extension groove 12 and the liquid inlet groove 15, multiple end holes are annularly distributed around the rotation axis, and a connection line between two end holes in each group of passages passes through the liquid inlet hole 21 located on the rotation axis (symmetric center), an included angle formed by connection lines between two end holes located on both sides of the liquid outlet hole 22 in the circumferential direction and the liquid inlet hole 21 is a first included angle 29, one end of the liquid inlet groove 15 communicating with the liquid inlet hole 21 is a third end 151, included angles formed by connection lines between the first end 13 and the second end 14 and the third end 151 respectively are second included angles 18, and the first included angle 29 is greater than or equal to the second included angle 18.

[0025] A selection valve according to this embodiment enables the liquid inlet groove 15 and the extension groove 12 to correspond to different sets of end holes by the relative rotation of the first valve body 1 and the second valve body 2. Thus, after the liquid enters the liquid inlet groove 15 from the liquid inlet hole 21, it can enter different sets of end holes, then flow out from another end hole of the same set as the entering end hole, and finally flow into the liquid outlet hole 22 through the extension groove 12 and the liquid outlet groove 11. The included angles formed by the connecting lines between the liquid inlet hole 21 and two end holes located on both sides of the liquid outlet hole 22 in the circumferential direction are the first included angle 29, and the included angles formed by the connecting lines between the first end part 13 and the second end part 14 and the third end part 151 are the second included angle 18. The setting that the first included angle 29 is greater than or equal to the second included angle 18 enables both end holes in a set to be used as inlets for liquid inflow and also as outlets for liquid outflow, and the outflowing liquid can all enter the liquid outlet groove 11, thereby realizing the two-way flow of liquid through the two end holes in a set, improving the test efficiency and meeting more complex process requirements.

[0026] A liquid inlet groove 15, a liquid outlet groove 11, and an extension groove 12 are provided on one end face of the first valve body 1. The extension groove 12 is communicated with the liquid outlet groove 11. The liquid outlet groove 11 includes a first end part 13 and a second end part 14 located at both ends of the liquid outlet groove 11. The liquid inlet groove 15 is located between the first end part 13 and the second end part 14, and the liquid delivery path of the liquid inlet groove 15 and the liquid delivery path of the extension groove 12 are on the same straight line. Specifically, the liquid outlet groove 11 is arc-shaped, the liquid inlet groove 15 is linear, and one end of the liquid inlet groove 15 surrounded by the liquid outlet groove 11 is the third end part 151, and the end of the liquid inlet groove 15 far from the third end part 151 is the fourth end part 152. The fourth end part 152 is located outside the position surrounded by the liquid outlet groove 11, that is, the liquid inlet groove 15 extends from the third end part 151 surrounded by the liquid outlet groove 11 through between the first end part 13 and the second end part 14 to the fourth end part 152. The extension groove 12 extends from the liquid outlet groove 11 towards the edge direction close to the first valve body 1. Preferably, the arc shape of the liquid outlet groove 11 is set with the third end part 151 as the center of the circle, and at the same time, the third end part 151 is located on the rotation axis.

[0027] The second valve body 2 and the first valve body 1 can rotate relative to each other. Specifically, the second valve body 2 is stationary, and the first valve body 1 can rotate relative to the second valve body 2. Preferably, both the second valve body 2 and the first valve body 1 are cylindrical, and the diameters of the second valve body 2 and the first valve body 1 are the same. The second valve body 2 includes a liquid outlet hole 22, a liquid inlet hole 21, and multiple groups of passages. Specifically, each group of passages includes two end holes. The multiple end holes, the liquid inlet hole 21, and the liquid outlet hole 22 penetrate the upper surface and the lower surface of the second valve body 2 along the axial direction of the cylinder. The lower surface of the second valve body 2 is attached to the upper surface of the first valve body 1, and the liquid inlet groove 15 of the first valve body 1 is located on the upper surface of the first valve body 1. The relative rotation axis of the first valve body 1 and the second valve body 2 is the symmetry axis of the cylinders of the first valve body 1 and the second valve body 2, and this axis passes through the third end 151 of the liquid inlet hole 21 and the liquid inlet groove 15. Thus, when the selection valve is in the working state, during the relative rotation of the first valve body 1 and the second valve body 2, the liquid inlet hole 21 can always remain on the liquid supply path of the liquid inlet groove 15, that is, the liquid inlet hole 21 can always remain in communication with the liquid inlet groove 15.

[0028] Referring to Figure 3 As shown, the distance between the liquid outlet hole 22 and the liquid inlet hole 21 is equal to the radius of the arc formed by the liquid outlet groove 11 and is less than the length of the liquid inlet groove 15. Thus, during the relative rotation of the second valve body 2 and the first valve body 1, the liquid outlet hole 22 can be Figure 3 at the position shown in Figures 6-7 on the liquid supply path of the liquid inlet groove 15, and can also be at the position shown in, for example, Figure 3 on the liquid supply path of the liquid outlet groove 11. Preferably, the straight line where the connection line of the liquid outlet hole 22 and the liquid inlet hole 21 is located is between the two end holes, so that the straight line where the connection line of the liquid outlet hole 22 and the liquid inlet hole 21 is located does not pass through the end holes. As Figure 3 shown, when the liquid outlet hole 22 and the liquid inlet hole 21 are both on the liquid supply path of the liquid inlet groove 15, the liquid can directly flow from the liquid inlet hole 21 through the liquid inlet groove 15 to the liquid outlet hole 22.

[0029] A plurality of end holes are annularly distributed around the rotation axis. The included angles between the respective end holes may be equal or unequal, and the distances between the respective end holes and the rotation axis are equal and greater than the radius of the arc formed by the liquid outlet groove 11. The end holes are located between the liquid delivery path of the liquid outlet groove 11 and the edge of the second valve body 2. The liquid delivery path distance of the extension groove 12 is greater than or equal to the distance between the end hole and the rotation axis minus the radius of the arc formed by the liquid outlet groove 11, and the distance of the liquid inlet groove 15 from the third end 151 to the fourth end 152 is greater than or equal to the distance between the end hole and the rotation axis. Thus, during the relative rotation of the first valve body 1 and the second valve body 2, a plurality of end holes can all be located on the liquid delivery paths of the extension groove 12 and the liquid inlet groove 15, that is, the end holes can communicate with the extension groove 12 and the liquid inlet groove 15. The two end holes of each group of passages communicate with each other, and the two end holes of each group of passages are connected to the column. The connection line of the two end holes in each group of passages passes through the rotation axis, that is, the two end holes in each group of passages are radially symmetrically arranged. When one end hole is located on the liquid delivery path of the liquid inlet groove 15, the other end hole in the same group is located on the liquid delivery path of the extension groove 12.

[0030] Refer to Figures 4 to 7 As shown, the included angle formed by the connection lines between two end holes located on both sides of the liquid outlet hole 22 in the circumferential direction and the liquid inlet hole 21 respectively is the first included angle 29, and the included angles formed by the connection lines between the first end 13 and the second end 14 and the third end 151 respectively are the second included angle 18. The first included angle 29 is greater than or equal to the second included angle 18. Thus, the two end holes in a group of passages can both serve as inlets for liquid to flow in and can also serve as outlets for liquid to flow out, and the liquid flowing out can all enter the liquid outlet groove 11. Specifically, five groups of passages are illustrated in the figure. The multiple pairs of end holes include the first end hole 23, the second end hole 24, the third end hole 25, the fourth end hole 26, the fifth end hole 27, and the sixth end hole 28 、The seventh end hole 271, the eighth end hole 281, the ninth end hole 272 and the tenth end hole 282, wherein the first end hole 23 and the second end hole 24 are a pair and are connected, the third end hole 25 and the fourth end hole 26 are a pair and are connected, the fifth through hole 27 and the sixth through hole 28 are a pair and are connected, the seventh end hole 271 and the eighth end hole 281 are a pair and are connected, the ninth end hole 272 and the tenth end hole 282 are a pair and are connected. Among them, the first end hole 23, the third end hole 25, the fifth end hole 27, the seventh end hole 271 and the ninth end hole 272 are the forward inlet end holes / reverse outlet end holes of each group of passages, and the second end hole 24, the fourth end hole 26, the sixth end hole 28, the eighth end hole 281 and the tenth end hole 282 are the forward outlet end holes / reverse inlet end holes of each group of passages. It can be seen from the figure that the forward inlet end holes / reverse outlet end holes of each group of passages, namely the first end hole 23, the third end hole 25, the fifth end hole 27, the seventh end hole 271 and the ninth end hole 272, are adjacent to each other, and the forward outlet end holes / reverse inlet end holes of each group of passages, namely the second end hole 24, the fourth end hole 26, the sixth end hole 28, the eighth end hole 281 and the tenth end hole 282, are adjacent to each other. The adjacent forward outlet end holes / reverse inlet end holes and forward outlet end holes / reverse inlet end holes are only the first end hole 23 and the fourth end hole 26, and the third end hole 25 and the second end hole 24.

[0031] The straight line where the connection line between the liquid inlet hole 21 and the liquid outlet hole 22 is located is between the first end hole 23 and the fourth end hole 26, that is, the liquid outlet hole 22 is arranged in the circumferential direction between the adjacent forward inlet end hole / reverse outlet end hole and the forward outlet end hole / reverse inlet end hole. The included angle formed by the connection lines of the first end hole 23 and the fourth end hole 26 with the liquid inlet hole 21 respectively is the first included angle 29. The setting that the first included angle 29 is greater than the second included angle 18 enables the sixth through hole 28 to be located in the extension groove 12 when the fifth end hole 27 is located in the liquid inlet groove 15, and the fifth end hole 27 to be located in the extension groove 12 when the sixth end hole 28 is located in the liquid inlet groove 15, so as to realize the bidirectional flow of the liquid in the passage formed by the fifth end hole 27 and the sixth end hole 28.

[0032] Preferably, the forward inlet end holes / reverse outlet end holes are equally angularly distributed, so that the forward outlet end holes / reverse inlet end holes are also equally angularly and equidistantly distributed. There is at least one end hole between the first end hole 23 and the third end hole 25, as Figure 5 shown, the included angle formed by the connection lines of any two adjacent end holes between the first end hole 23 and the third end hole 25 with the liquid inlet hole 21 respectively is the seventh included angle, and the seventh included angle is less than the first included angle 29.

[0033] Specifically, in this embodiment, a fifth end hole 27, a seventh end hole 271, and a ninth end hole 272 are provided between the first end hole 23 and the third end hole 25. Among the first end hole 23, the third end hole 25, the fifth end hole 27, the seventh end hole 271, and the ninth end hole 272, the angle formed by the connection lines of any two adjacent end holes with the liquid inlet hole 21 is the seventh angle 273. The angles formed by the connection lines of the first end hole 23 and the fourth end hole 26 with the liquid inlet hole 21 are the first angles 29. The seventh angle 273 is less than the first angle 29, so that the angles formed by the connection lines of any two adjacent end holes among the second end hole 24, the fourth end hole 26, the sixth end hole 28, the eighth end hole 281, and the tenth end hole 282 with the liquid inlet hole 21 are also less than the first angle 29.

[0034] Preferably, as Figure 3 shown, when the first valve body 1 and the second valve body 2 rotate relative to each other such that both the liquid inlet hole 21 and the liquid outlet hole 22 are located on the liquid delivery path of the liquid inlet groove 15, the end hole closest to the first end portion 13 is the first end hole 23, so that the first end hole 23 is radially aligned with the first end portion 13, and the end hole closest to the second end portion 14 is located at the fourth end hole 26, so that the fourth end hole 26 is radially aligned with the second end portion 14.

[0035] See Figure 5 , the angles formed by the connection lines of the first end hole 23 and the liquid outlet hole 22 with the liquid inlet hole 21 are the third angles 221. See Figure 4 , the angle between the connection line between the second end portion 14 and the third end portion 151 and the liquid delivery path of the liquid inlet groove 15 is the fourth angle 17. The third angle 221 is greater than or equal to the fourth angle 17. See Figure 5 , the angles formed by the connection lines of the fourth end hole 26 and the liquid outlet hole 22 with the liquid inlet hole 21 are the fifth angles 261. See Figure 4 , the angle between the connection line between the first end portion 13 and the third end portion 151 and the liquid delivery path of the liquid inlet groove 15 is the sixth angle 16. The fifth angle 261 is greater than or equal to the sixth angle 16. The setting that the third angle 221 is greater than the fourth angle 17 and the setting that the fifth angle 261 is greater than the sixth angle 16 enable the two end holes of each group of channels to achieve bidirectional liquid flow.

[0036] The first angle 29 is equal to the sum of the third angle 221 and the fifth angle 261, and the second angle 18 is equal to the sum of the fourth angle 17 and the sixth angle 16. Due to the setting that the third angle 221 is greater than the fourth angle 17 and the setting that the fifth angle 261 is greater than the sixth angle 16, the first angle 29 is greater than or equal to the second angle 18.

[0037] Preferably, the connection line between the liquid inlet hole 21 and the liquid outlet hole 22 is located at the middle position between the first end hole 23 and the fourth end hole 26. The liquid delivery path of the liquid inlet groove 15 is located at the middle position between the first end portion 13 and the second end portion 14. The diameters of the liquid inlet hole 21, the liquid outlet hole 22 and the end holes are equal. The widths of the liquid inlet groove 15, the liquid outlet groove 11 and the extension groove 12 are equal. Thus, when two end holes of each group of passages need to have bidirectional flow, the relative rotation angle of the first valve body 1 and the second valve body 2 is 180°.

[0038] During use, the first valve body 1 and the second valve body 2 rotate relative to each other. As Figure 3 shown, when both the liquid inlet hole 21 and the liquid outlet hole 22 are located on the liquid delivery path of the liquid inlet groove 15, the liquid enters the liquid inlet groove 15 from the liquid inlet hole 21, and flows out from the liquid outlet hole 22 after passing through the liquid inlet groove 15. At this position, the liquid does not flow through any passage, that is, it does not flow through the column. When the liquid needs to flow through the column, taking the liquid flowing from the first end hole 23 to the second end hole 24, that is, flowing forward through the passage composed of the first end hole 23 and the second end hole 24 as an example, as Figure 6 shown, the first valve body 1 and the second valve body 2 rotate relative to each other, so that the first end hole 23 is located on the liquid delivery path of the liquid inlet groove 15, and the second end hole 24 is located on the liquid delivery path of the extension groove 12. The liquid enters the first end hole 23 from the liquid inlet hole 21 through the liquid inlet groove 15. After the liquid passes through the column between the first end hole 23 and the second end hole 24, it flows out from the second end hole 24. Finally, the liquid flows out from the liquid outlet hole 22 through the extension groove 12 and the liquid outlet groove 11. When the liquid needs to flow from the second end hole 24 to the first end hole 23, that is, flowing backward through the passage composed of the first end hole 23 and the second end hole 24, as Figure 7 shown, the first valve body 1 and the second valve body 2 rotate relative to each other, so that the first end hole 23 is located on the liquid delivery path of the extension groove 12, and the second end hole 24 is located on the liquid delivery path of the liquid inlet groove 15, and the liquid can flow from the second end hole 24 to the first end hole 23.

[0039] A selection valve of the present utility model enables the liquid inlet groove 15 and the extension groove 12 to correspond to different groups of end holes through the relative rotation of the first valve body 1 and the second valve body 2. Thus, after the liquid enters the liquid inlet groove 15 from the liquid inlet hole 21, it can enter different end holes, and then flow out from another end hole of the same group as the entered end hole, and finally flow into the liquid outlet hole 22 through the liquid outlet groove 11. By setting the first included angle 29 to be greater than or equal to the second included angle 18, both end holes in a group can be used as inlets for the liquid to flow in, and can also be used as outlets for the liquid to flow out. Moreover, the flowing-out liquid can all enter the liquid outlet groove 11, thereby realizing the bidirectional flow of the liquid in the passage composed of two end holes in a group, improving the test efficiency and meeting more complex process requirements.

[0040] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the creation of the present utility model.

Claims

1. A selector valve, characterized in that: include: a first valve body, the first valve body being provided with a liquid inlet groove, a liquid outlet groove and an extension groove, the extension groove being communicated with the liquid outlet groove, the liquid outlet groove comprising a first end portion and a second end portion located at both ends of the liquid outlet groove, the liquid inlet groove being located between the first end portion and the second end portion, and a liquid delivery path of the liquid inlet groove and a liquid delivery path of the extension groove being located on the same straight line; The second valve body, the first valve body and the second valve body can rotate relative to each other, the second valve body includes a liquid outlet, a liquid inlet and a plurality of pairs of end holes, in the working state, the liquid outlet can be located on the liquid delivery path of the liquid outlet groove, and the liquid inlet is located on the liquid delivery path of the liquid inlet groove, and the plurality of end holes can all be located on the liquid delivery path of the extension groove and the liquid inlet groove, the two end holes in each pair of end holes are radially arranged opposite to each other, the angle formed by the line connecting the two end holes located on both sides of the liquid outlet in the circumferential direction and the liquid inlet is a first angle, the end of the liquid inlet groove connected to the liquid inlet is a third end, the angle formed by the line connecting the first end and the second end and the third end is a second angle, and the first angle is greater than or equal to the second angle.

2. The selector valve according to claim 1, characterized in that: The extension groove extends from the liquid outlet groove toward the direction close to the edge of the first valve body, and the plurality of end holes are located between the liquid delivery path of the liquid outlet groove and the edge of the second valve body.

3. The selector valve according to claim 1, characterized in that: The multiple pairs of end holes include a first end hole, a second end hole, a third end hole and a fourth end hole, wherein the first end hole and the second end hole are a pair, and the third end hole and the fourth end hole are a pair, when the first valve body and the second valve body rotate relative to each other so that the liquid inlet hole and the liquid outlet hole are both located in the liquid delivery path of the liquid inlet groove, the first end hole is radially aligned with the first end portion, the fourth end hole is radially aligned with the second end portion, the liquid inlet hole is located on the rotation axis, and the liquid outlet hole is circumferentially located between the adjacent first end hole and the fourth end hole.

4. The selector valve according to claim 3, characterized in that: The angle formed by the first end hole located on one side of the liquid outlet and the connecting line of the liquid outlet and the liquid inlet hole is the third angle, the angle between the connecting line between the second end and the third end and the liquid delivery path of the liquid inlet groove is the fourth angle, and the third angle is greater than or equal to the fourth angle.

5. The selector valve according to claim 3, characterized in that: The angle formed by the fourth end hole located on the other side of the liquid outlet and the liquid outlet and the line connecting the liquid inlet hole is the fifth angle, the angle between the line connecting the first end and the third end and the liquid delivery path of the liquid inlet groove is the sixth angle, and the fifth angle is greater than or equal to the sixth angle.

6. The selector valve according to claim 3, characterized in that: At least one end hole is further provided between the first end hole and the third end hole, and the angle formed by the connecting line between any two adjacent end holes between the first end hole and the third end hole and the liquid inlet hole is the seventh angle, and the seventh angle is smaller than the first angle.

7. The selector valve according to claim 3, characterized in that: The connecting line between the liquid inlet and the liquid outlet is located in the middle between the first end hole and the fourth end hole, and the liquid delivery path of the liquid inlet groove is located in the middle between the first end and the second end.

8. The selector valve according to claim 1, characterized in that: The liquid outlet groove is in an arc shape with the third end as the axis.

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