Active one-way valve

Abstract

The utility model discloses an active one-way valve which comprises a valve body, a flowing cavity is formed in the valve body, an upper cover body connected with the valve body in a sealed mode is arranged at the top of the flowing cavity, a lower cover body connected with the valve body in a sealed mode is arranged at the bottom of the flowing cavity, and liquid guiding cavities communicated with the flowing cavity are formed in the surfaces of the upper cover body and the lower cover body. A sealing ball, a limiting baffle, a liquid guide column and a telescopic spring are sequentially and movably arranged in the flowing cavity from top to bottom, the limiting baffle is fixedly connected with the liquid guide column, the top of the telescopic spring is fixedly connected with the bottom of the limiting baffle, and the bottom of the telescopic spring is fixedly connected with the inner wall of the valve body. A first liquid guide groove and a second liquid guide groove which are symmetrically designed are formed in the bottom of the liquid guide column.

Description

Technical Field

[0001] This utility model belongs to the field of one-way valve technology, and more specifically, it relates to an active one-way valve. Background Technology

[0002] High-pressure infusion pumps are a crucial component of high-performance liquid chromatographs (HPLC), and their performance directly impacts analytical stability, repeatability, and accuracy. Within these pumps, the check valve is not only an indispensable part but its performance also directly determines the pump's effectiveness, thus influencing chromatographic analysis. A check valve prevents backflow of the flowing medium by automatically opening and closing a valve ball. It primarily controls the flow of fluid in one direction, stopping it from flowing in the opposite direction. Due to the low flow rate, high pressure, and stringent requirements for flow stability in HPLC, the internal structure and dimensions of check valves face significant demands. Traditional check valve designs struggle to provide stable unidirectional flow under these conditions, and the valve core is prone to merging with one side, leading to blockage or failure. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides an active one-way valve to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an active one-way valve, comprising a valve body, wherein a flow cavity is provided inside the valve body, an upper cover is provided at the top of the flow cavity and sealed to the valve body, and a lower cover is provided at the bottom of the flow cavity and sealed to the valve body; a liquid guiding cavity communicating with the flow cavity is provided on the surface of the upper cover and the lower cover; a sealing ball, a limiting baffle, a liquid guiding column and a telescopic spring are arranged sequentially from top to bottom in the flow cavity, the limiting baffle is fixedly connected to the liquid guiding column, the top of the telescopic spring is fixedly connected to the bottom of the limiting baffle, the bottom of the telescopic spring is fixedly connected to the inner wall of the valve body, and a first liquid guiding groove and a second liquid guiding groove are symmetrically designed at the bottom of the liquid guiding column.

[0005] Preferably, the valve body is provided with a screw housing for sealing and pressing connection, and the top of the screw housing is provided with an installation threaded ring.

[0006] Preferably, a sealing ring is provided at the connection and sealing point between the upper cover and the lower cover surface and the valve body.

[0007] Preferably, the bottom of the upper cover is provided with a guide groove that is adapted to the sealing sphere.

[0008] Preferably, the valve body surface has multiple reinforcing grooves.

[0009] Preferably, the diameter of the sealing sphere is smaller than the cross-sectional width of the flow cavity, and the cross-sectional width of the limiting baffle is smaller than the cross-sectional width of the flow cavity.

[0010] Preferably, the valve body is made of high-pressure resistant stainless steel.

[0011] This utility model provides an active one-way valve, which has the following beneficial effects:

[0012] 1. The overall structure is quick and easy to install and use. Through the structural design of the sealing sphere, limiting baffle, liquid guiding column and telescopic spring, it can ensure that the liquid passes through stably from top to bottom and prevent liquid backflow, thereby ensuring the accuracy of the analysis results.

[0013] 2. The valve body is made of high-pressure resistant stainless steel, and the sealing ball is made of ruby. These materials can withstand high-pressure environments, ensuring the stability and reliability of the system.

[0014] 3. Using a spring-loaded check valve can reduce flow formation, shorten response time, enhance sealing, and improve overall flow efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the valve body without a spring according to this utility model.

[0018] Figure 4 This is a schematic diagram of the valve body sealing structure without spring according to this utility model.

[0019] Figure 5 This is a front view of the present invention.

[0020] Figure 6 This is a cross-sectional view of the present invention.

[0021] In the diagram, 1. Valve body; 2. Flow chamber; 3. Upper cover; 4. Lower cover; 5. Liquid guiding chamber; 6. Sealing ball; 7. Limiting baffle; 8. Liquid guiding column; 9. Telescopic spring; 10. First liquid guiding groove; 11. Second liquid guiding groove; 12. Guide groove; 13. Sealing ring; 14. Screw housing; 15. Mounting threaded ring; 16. Reinforcing groove. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship 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, and 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. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please see Figures 1 to 6 This utility model provides a technical solution: an active one-way valve, including a valve body 1, a flow cavity 2 inside the valve body 1, an upper cover 3 sealed to the top of the flow cavity 2, and a lower cover 4 sealed to the bottom of the flow cavity 2. The surfaces of the upper cover 3 and the lower cover 4 are provided with liquid guiding cavities 5 communicating with the flow cavity 2. Inside the flow cavity 2, from top to bottom, are sequentially arranged a sealing ball 6, a limiting baffle 7, a liquid guiding column 8, and a telescopic spring 9. The limiting baffle 7 is fixedly connected to the liquid guiding column 8, the top of the telescopic spring 9 is fixedly connected to the bottom of the limiting baffle 7, and the bottom of the telescopic spring 9 is fixedly connected to the inner wall of the valve body 1. The bottom of the liquid guiding column 8 has a symmetrically designed first liquid guiding groove 10 and a second liquid guiding groove 11. The bottom of the upper cover 3 has a guide groove 12 adapted to the sealing ball 6, and the cross-section of this guide groove 12 is semi-circular. The diameter of the sealing sphere 6 is smaller than the cross-sectional width of the flow cavity 2, and the cross-sectional width of the limiting baffle 7 is smaller than the cross-sectional width of the flow cavity 2.

[0026] A sealing ring 13 is provided at the connection and sealing point between the upper cover 3 and the lower cover 4 and the valve body 1. The valve body 1 is provided with a screw housing 14 for sealing and tightening connection, and a mounting thread ring 15 is provided inside the top of the screw housing 14. The valve body 1 is made of high-pressure resistant stainless steel, and multiple reinforcing grooves 16 are formed on the surface.

[0027] The specific usage and function of this embodiment: The mounting threaded ring 15 provided inside the top of the screw housing 14 is used to connect the external pipeline. The liquid enters the liquid guiding cavity 5 on the surface of the upper cover 3 through the pipeline, and then enters the flow cavity 2 in the lower valve body 1. The sealing ball 6, which was originally in a state of no liquid flow, is pushed upward by the lower telescopic spring 9 and the limiting baffle 7. The sealing ball 6 is located in the semi-circular arc-shaped guide groove 12. The flow cavity 2 and the lower liquid guiding cavity 5 are in a sealed state. Since the liquid flows in from top to bottom, the sealing ball 6 and the limiting baffle 7 press the telescopic spring 9 downward. The liquid flows downward along the sealing ball 6 and the limiting baffle 7 on both sides, and flows into the liquid guiding cavity 5 on the surface of the lower cover 4 along the first liquid guiding groove 10 and the second liquid guiding groove 11 on both sides of the bottom of the liquid guiding column 8, and then flows out smoothly. To maintain the stability of the internal liquid flow of the liquid chromatograph and prevent backflow, a telescopic spring 9 and a limiting baffle 7 are used to push the sealing ball 6 upward to achieve a seal and prevent liquid leakage and backflow. In addition, the high hardness of the sapphire sealing valve ball can maintain a stable seal under high pressure.

[0028] The overall structure is quick and easy to install and use. Through the structural design of the sealing ball 6, limiting baffle 7, liquid guiding column 8, and telescopic spring 9, it ensures stable liquid flow from top to bottom, preventing backflow and thus guaranteeing the accuracy of analytical results. The valve body 1 is made of high-pressure resistant stainless steel, and the sealing ball 6 is made of ruby; these materials can withstand high-pressure environments, ensuring the stability and reliability of the system. The spring-loaded check valve reduces flow formation, shortens response time, enhances sealing, and improves overall flow efficiency.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An active check valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a flow cavity (2) inside. The top of the flow cavity (2) is provided with an upper cover (3) that is sealed and connected to the valve body (1). The bottom of the flow cavity (2) is provided with a lower cover (4) that is sealed and connected to the valve body (1). The surfaces of the upper cover (3) and the lower cover (4) are provided with a liquid guiding cavity (5) that communicates with the flow cavity (2). The flow cavity (2) is provided with a sealing ball (6), a limiting baffle (7), a liquid guiding column (8) and a telescopic spring (9) arranged sequentially from top to bottom. The limiting baffle (7) is fixedly connected to the liquid guiding column (8). The top of the telescopic spring (9) is fixedly connected to the bottom of the limiting baffle (7). The bottom of the telescopic spring (9) is fixedly connected to the inner wall of the valve body (1). The bottom of the liquid guiding column (8) is provided with a first liquid guiding groove (10) and a second liquid guiding groove (11) with symmetrical design.

2. The active check valve according to claim 1, characterized in that: The valve body (1) is provided with a screw housing (14) for sealing and pressing connection, and a mounting threaded ring (15) is provided inside the top of the screw housing (14).

3. The active check valve according to claim 1, characterized in that: A sealing ring (13) is provided at the connection and sealing point between the upper cover (3) and the lower cover (4) and the valve body (1).

4. The active check valve according to claim 1, characterized in that: The bottom of the upper cover (3) is provided with a guide groove (12) that is adapted to the sealing ball (6).

5. An active check valve according to claim 1, characterized in that: The valve body (1) has multiple reinforcing grooves (16) on its surface.

6. An active check valve according to claim 1, characterized in that: The diameter of the sealing sphere (6) is smaller than the cross-sectional width of the flow cavity (2), and the cross-sectional width of the limiting baffle (7) is smaller than the cross-sectional width of the flow cavity (2).

7. An active check valve according to claim 1, characterized in that: The valve body (1) is made of high-pressure resistant stainless steel.

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