Corrosion-resistant plug valve and plug valve kit

Abstract

The utility model provides a corrosion-resistant plug valve and a plug valve kit, the corrosion-resistant plug valve comprises a shell and a valve core, and the valve core is rotatably connected in the shell; the shell is provided with three connectors, and the inner connector faces of the three connectors are evenly distributed relative to the center axis of the valve element. The valve element is provided with a fluid channel. When the valve element rotates, the fluid channel can be communicated with any two adjacent connectors or not connected with any connector. The fluid channel is a diversion trench, an arc-shaped hole or a corner hole. The corrosion-resistant plug valve and the plug valve kit provided by the utility model aim to overcome the defects in the prior art, and have the advantages of convenience in use, symmetrical structure, uniform stress, easiness in sealing and difficulty in abrasion.

Description

Technical Field

[0001] This utility model relates to the field of plug valve technology, and in particular to a corrosion-resistant plug valve and a plug valve kit. Background Technology

[0002] Drug synthesis has certain unique characteristics. The precise dosage of reagents used is crucial, and the reagents often contain corrosive substances such as acids, alkalis, and organic solvents. Furthermore, the labeling process involves radioactivity. Therefore, specific requirements are placed on drug synthesis equipment. In existing radiopharmaceutical synthesis equipment, flow control of reagent dispensing is typically achieved using a stopcock valve; rotating the valve core switches the flow path.

[0003] Existing plug valve cores mainly come in three forms: T-type, L-type, and oblique bore. For example... Figure 1 As shown; the main problem with the T-type is the presence of liquid residue, but it has four connection states plus one cut-off state. The L-type does not have the problem of liquid residue, but it cannot connect the left and right sides, and it cannot connect all three interfaces simultaneously; the oblique hole type does not have the problem of residue, and it can connect the left and right sides, but this design has poor symmetry, is difficult to seal, and the sharp edges of the oblique holes are prone to wear and chipping.

[0004] Therefore, corrosion-resistant plug valves and plug valve kits are proposed to address the above issues. Utility Model Content

[0005] The purpose of this utility model is to overcome the existing defects and provide a corrosion-resistant plug valve and plug valve kit, which has the advantages of being easy to use, having a symmetrical structure, uniform stress distribution, being easy to seal, and not being easily worn.

[0006] The technical solution to achieve the above objective is: a corrosion-resistant plug valve, comprising a housing and a valve core, wherein the valve core is rotatably connected within the housing; the housing has three ports, the inner interface surfaces of the three ports being evenly distributed relative to the central axis of the valve core; the valve core is provided with a fluid channel; when the valve core rotates, the fluid channel can connect any two adjacent ports or not connect any port.

[0007] Optionally, the fluid channel is a guide groove, which is formed on the outer wall of the valve core.

[0008] Optionally, an elastic adjustment hole is provided at the center of the valve core.

[0009] Optionally, the fluid channel is an arc-shaped hole or a corner hole.

[0010] Optionally, the diameters of the arc-shaped hole and the corner hole are the same as the diameter of the interface.

[0011] Accordingly, this utility model also provides a plug valve kit, which includes at least one row of valves, each row of valves including N corrosion-resistant plug valves as described in any one of the claims, the N corrosion-resistant plug valves being arranged side by side and sequentially sealed and connected, where N is a natural number.

[0012] Optionally, the central axis of the first interface and the central axis of the second interface of the corrosion-resistant plug valve are located on the same straight line, and the central axis of the third interface of the corrosion-resistant plug valve is perpendicular to the straight line.

[0013] Optionally, the plug valve assembly further includes: a male Luer connector, a female Luer connector, and a plate valve body;

[0014] The housings of the N corrosion-resistant plug valves are integrated with the plate-shaped valve body;

[0015] The male Luer connector is located on the first port of the first corrosion-resistant plug valve, and the female Luer connector is located on the second port of the Nth corrosion-resistant plug valve and the third port of each of the corrosion-resistant plug valves.

[0016] Optionally, the male Luer connector is provided with a Luer locking cap, and two adjacent valve groups are connected through the male Luer connector and the female Luer connector. The male Luer connector and the female Luer connector are fixedly connected by the Luer locking cap.

[0017] The beneficial effects of this utility model are as follows: This corrosion-resistant plug valve and plug valve kit, by opening a guide groove on the outer wall of the valve core, allows for a reasonable design of the groove shape and a smooth, gradual transition at the groove opening, thereby reducing chipping. Since the guide groove is positioned away from the central area of ​​the valve core, an elastic adjustment hole can be made in the central area of ​​the valve core, thus adjusting the overall hardness of the valve core. Simultaneously, with the hole drilled, the sealing surface of the valve core has an adaptive deformation capability to the valve body. By adjusting the overall hardness of the valve core through the hole, the interference fit of the sealing surface can be increased, reducing the precision requirements of the sealing surfaces of the valve body and valve core, thereby reducing manufacturing difficulty. The valve core's adaptive deformation capability, achieved through the hole, transforms the valve core structure into a stressed arch structure, ensuring a good fit even if the roundness of the valve body is not ideal. This improves the sealing's adaptability to different shapes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a plug valve in the prior art and its status;

[0019] Figure 2 This is a cross-sectional view of the corrosion-resistant plug valve according to Embodiment 1 of this utility model;

[0020] Figure 3 This is a cross-sectional view of the corrosion-resistant plug valve according to Embodiment 2 of this utility model;

[0021] Figure 4 This is a cross-sectional view of the corrosion-resistant plug valve according to Embodiment 3 of this utility model;

[0022] Figure 5 This is a diagram showing the various adjustment states of the guide groove in Embodiment 1 of this utility model;

[0023] Figure 6 This is a cross-sectional view of the valve assembly according to an embodiment of the present invention;

[0024] Figure 7 This is a diagram showing the various adjustment states of the corner hole in Embodiment 3 of this utility model;

[0025] Figure 8 This is a diagram showing the various adjustment states of the arc-shaped hole in Embodiment 2 of this utility model;

[0026] Figure 9 This is a cross-sectional view of the valve assembly according to an embodiment of the present invention;

[0027] Figure 10 This is a cross-sectional view of the plug valve assembly in the valve assembly docking position according to an embodiment of the present invention;

[0028] Figure 11 This is an isometric view of the valve assembly according to an embodiment of this utility model.

[0029] In the diagram: 1. Housing; 2. Valve core; 3. Interface; 4. Guide groove; 5. Arc-shaped hole; 6. Corner hole; 7. Elastic adjustment hole; 8. Plate-shaped valve body. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Example 1

[0033] Please refer to Figure 2 and Figure 5 This is a schematic diagram of the corrosion-resistant plug valve according to Embodiment 1 of this utility model. Figure 2-and Figure 5 As shown, the corrosion-resistant plug valve includes a housing 1 and a valve core 2, with the valve core 2 rotatably connected inside the housing 1. The housing 1 has three ports 3, and the inner interface surfaces of the three ports 3 are evenly distributed relative to the central axis of the valve core 2. The valve core 2 is provided with a fluid channel. When the valve core 2 rotates, the fluid channel can connect any two adjacent ports 3 or not connect any port 3.

[0034] Specifically, the housing 1 is made of PPSU plastic, which has good corrosion resistance and hardness. The valve core 2 is made of HDPE plastic, which has good corrosion resistance and flexibility.

[0035] Specifically, the housing 1, also called the valve body, has three ports 3. The inner port surfaces of the three ports 3 (i.e., the end faces of ports 3 facing the valve core 2) are approximately uniformly distributed relative to the central axis of the valve body (i.e., the central axis of the valve core 2). Figure 2 As shown, the central axis of each interface 3 intersects with the corresponding inner interface surface at a point, and the angle between two adjacent intersection points and the central axis of the valve core 2 is 120 degrees.

[0036] In this embodiment, the corrosion-resistant plug valve uses the guide groove 4 as the fluid channel, and the guide groove 4 is formed on the outer wall of the valve core 2. By rotating the valve core 2, the relative position of the guide groove 4 and the interface 3 can be adjusted. During the rotation, the guide groove 4 can better connect any two interfaces 3, or connect only one interface.

[0037] This corrosion-resistant plug valve features a guide groove 4 on the outer wall of the valve core 2. The groove shape can be rationally designed, and the groove opening details can achieve a smooth, gradual transition, thus reducing chipping. The guide groove 4 effectively avoids the central area of ​​the valve core. Therefore, an elastic adjustment hole 7 can be made in the central area of ​​the valve core, thereby adjusting the overall hardness of the valve core. Simultaneously, with the hole made, the sealing surface of the valve core has an adaptive deformation capability to the valve body. By adjusting the overall hardness of the valve core through the hole, the interference fit of the sealing surface can be increased, reducing the precision requirements of the sealing surfaces of the valve body and valve core, thus reducing manufacturing difficulty. The valve core's adaptive deformation capability after the hole is made transforms its structure into a stressed arch structure, ensuring a good fit even if the roundness of the valve body is not ideal. This improves the sealing's adaptability to different shapes.

[0038] In this embodiment, the valve core 2 has an elastic adjustment hole 7 at its center; by adjusting the size of this hole, the overall hardness of the valve core can be changed. Reducing the overall hardness can increase the interference fit of the sealing surface, thereby reducing the precision requirements of the sealing surface. Another advantage is that the arched structure formed by the valve core automatically adapts to the roundness of the valve body hole, thereby improving the compatibility of the seal.

[0039] Example 2

[0040] like Figure 3 ,8 As shown, the fluid channel on the valve core 2 can also be an arc-shaped hole 5, with the end face of the arc-shaped hole 5 approximately perpendicular to the outer circumference of the valve core. Rotating the arc-shaped hole 5 allows for easy connection between any two interfaces; additionally, rotating the arc-shaped hole 5 allows for the avoidance of connecting any interface. The arc-shaped hole 5 effectively avoids sharp edge problems and reduces wear and chipping.

[0041] Example 3

[0042] like Figure 4 , 7 As shown, the fluid channel on the valve core 2 can also be a corner hole 6, with the end face of the corner hole 6 approximately perpendicular to the outer circumferential surface of the valve core. Rotating the corner hole 6 allows for easy connection of any two interfaces; additionally, rotating the corner hole 6 allows for the avoidance of connecting any interface. The corner hole 6 effectively avoids sharp edge issues and reduces wear and chipping.

[0043] Accordingly, this embodiment also provides a plug valve kit. Please refer to... Figure 9-11 The plug valve assembly includes at least one row of valves, each row of valves including N corrosion-resistant plug valves as described above, the N corrosion-resistant plug valves being arranged side by side and sequentially sealed and connected, where N is a natural number.

[0044] Specifically, the central axis of the first port and the central axis of the second port in the corrosion-resistant plug valve are located on the same straight line, and the central axis of the third port of the corrosion-resistant plug valve is perpendicular to the straight line.

[0045] The plug valve assembly further includes: a male Luer connector, a female Luer connector, and a plate valve body 8; the housings 1 of the N corrosion-resistant plug valves are integrated with the plate valve bodies 8; the male Luer connector is disposed on the first port of the first corrosion-resistant plug valve, and the female Luer connector is disposed on the second port of the Nth corrosion-resistant plug valve and the third port of each corrosion-resistant plug valve. A Luer locking cap is provided on the male Luer connector, and two adjacent valve groups are connected via the male and female Luer connectors, with the male and female Luer connectors fixedly connected by the Luer locking cap.

[0046] like Figure 6As shown, in this embodiment, the valve assembly consists of six corrosion-resistant plug valves arranged side by side and sequentially sealed. When the valve core 2 is rotated to a non-preset connection position within the housing 1, the three ports 3 are not interconnected, and all corrosion-resistant plug valves are in a closed state (see the last three corrosion-resistant plug valves in the figure). When the valve core 2 is rotated to a preset connection position within the housing 1, the guide groove 4 can connect the first port to the second port, or the first port to the third port, or the second port to the third port, and all corrosion-resistant plug valves are in a connected state (see the first three corrosion-resistant plug valves in the figure).

[0047] For a plug valve kit with multiple corrosion-resistant plug valves, the connection position of the guide groove 4 of any one of the corrosion-resistant plug valves can be independently controlled, thereby enabling the selective addition of multiple reagents for drug synthesis using multiple reagents.

[0048] The plug valve can be rotated manually or used in conjunction with a drive device, which controls the rotation position of the valve core 2.

[0049] In this embodiment, the plug valve assembly uses a corrosion-resistant plug valve with a flow guide groove 4 as the fluid channel. In other embodiments, corrosion-resistant plug valves with arc-shaped holes 5 or corner holes 6 as the fluid channel can also be used. Both types of corrosion-resistant plug valves can also achieve conduction between any two ports 3, or non-conductivity between the three ports 3. The specific structure and working state will not be described here.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A corrosion-resistant plug valve, characterized in that, The device includes a housing (1) and a valve core (2), the valve core (2) being rotatably connected inside the housing (1); the housing (1) has three interfaces (3), the inner interface surfaces of the three interfaces (3) being evenly distributed relative to the central axis of the valve core (2); the valve core (2) is provided with a fluid channel; when the valve core (2) rotates, the fluid channel can connect any two adjacent interfaces (3) or not connect any one interface (3).

2. The corrosion-resistant plug valve according to claim 1, characterized in that, The fluid channel is a guide groove (4), which is opened on the outer wall of the valve core (2).

3. The corrosion-resistant plug valve according to claim 2, characterized in that, An elastic adjustment hole (7) is provided at the center of the valve core (2).

4. The corrosion-resistant plug valve according to claim 1, characterized in that, The fluid channel is an arc-shaped hole (5) or a corner hole (6).

5. The corrosion-resistant plug valve according to claim 4, characterized in that, The diameters of the arc-shaped hole (5) and the corner hole (6) are the same as the diameter of the interface (3).

6. A plug valve assembly, characterized in that, It includes at least one row of valves, each row of valves including N corrosion-resistant plug valves as described in any one of claims 1 to 5, wherein the N corrosion-resistant plug valves are arranged side by side and sequentially sealed and connected, where N is a natural number.

7. The plug valve assembly according to claim 6, characterized in that, The central axis of the first port and the central axis of the second port of the corrosion-resistant plug valve are on the same straight line, and the central axis of the third port of the corrosion-resistant plug valve is perpendicular to the straight line.

8. The plug valve assembly according to claim 6, characterized in that, Also includes: Male Luer connector, female Luer connector and plate valve body (8); The housings (1) of the N corrosion-resistant plug valves are connected to the plate valve body (8) as one unit; The male Luer connector is located on the first port of the first corrosion-resistant plug valve, and the female Luer connector is located on the second port of the Nth corrosion-resistant plug valve and the third port of each of the corrosion-resistant plug valves.

9. The plug valve assembly according to claim 8, characterized in that, The male Luer connector is equipped with a Luer locking cap. Two adjacent valve groups are connected through the male Luer connector and the female Luer connector. The male Luer connector and the female Luer connector are fixedly connected by the Luer locking cap.

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