One-way valve

Abstract

The utility model relates to the field of medical instruments, in particular to a one-way valve which comprises a valve body, a cavity is formed in the middle of the valve body, a first fluid channel and a second fluid channel are communicated with the two sides of the cavity respectively, and a plurality of connecting columns are arranged on the side, close to the first fluid channel, of the cavity in the circumferential direction of the first fluid channel. A gap is reserved between the height of the connecting column and the side, close to the second fluid channel, of the cavity. The valve element comprises a valve element base plate and a limiting part extending upwards, the valve element base plate is matched with the ends of the connecting columns, and the valve element limiting part is matched with the inner side faces of the connecting columns. The one-way valve has the advantages that due to the structural arrangement of the valve element, it is guaranteed that the one-way valve can respond in the flowing direction of fluid, one-way flowing control over the fluid is achieved, the backflow phenomenon of the fluid is prevented, and safety and stability of medical work are guaranteed; the structure of a one-way valve in the prior art is simplified, parts can be replaced, the structure is stable, the medical cost is reduced, and the use efficiency of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and specifically relates to a one-way valve. Background Art

[0002] Medical one-way valves are key components in modern medical technology and are widely used in various medical devices. At present, the manufacturing technology of medical one-way valves has developed to a certain extent. They are mainly used to control the one-way flow of fluids, prevent backflow and contamination, and ensure the safety and hygiene of the medical process. The existing medical one-way valves have a relatively complex structure, are cumbersome to assemble, and lack reliability. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a one-way valve to control the one-way flow of fluids, prevent backflow and contamination, and optimize the structure of the one-way valve.

[0004] To achieve the above purpose, a one-way valve is designed, including: a valve body, a cavity is provided in the middle of the valve body, one side of the cavity communicates with a first fluid channel, the other side of the cavity communicates with a second fluid channel, several connecting columns are provided along the circumferential direction of the first fluid channel on the side of the cavity close to the first fluid channel, and there is a gap between the height of the connecting columns and the side of the cavity close to the second fluid channel; a valve core, the valve core includes a valve core chassis and a limiting part extending upward, the valve core chassis cooperates with the end of the connecting column, and the end of the connecting column is used to limit the longitudinal movement of the valve core in the gap between the connecting column and the cavity, and the limiting part of the valve core cooperates with the inner sides of several connecting columns, and the connecting columns are used to limit the lateral movement of the valve core.

[0005] Preferably, a sealing ring is provided on the side of the cavity of the utility model close to the second fluid channel, and the sealing ring cooperates with the valve core chassis for sealing.

[0006] Preferably, several connecting columns of the utility model form a channel, the radius of the valve core chassis is greater than the radius of the channel, and the radius of the limiting part of the valve core is less than the radius of the channel.

[0007] Compared with the prior art, the utility model has the following advantages:

[0008] 1. The utility model ensures that the one-way valve can respond to the flow direction of the fluid through the structural setting of the valve core, realizes the control of the one-way flow of the fluid, prevents the backflow phenomenon of the fluid, and ensures the safety and stability of medical work.

[0009] 2. The structure of the one-way valve in the prior art is simplified, the parts are replaceable and the structure is stable, reducing the medical cost and improving the use efficiency of the equipment. Brief Description of the Drawings

[0010] Figure 1 ... is the perspective view of the utility model in an oblique view.

[0011] Figure 2 is a perspective view of the present utility model from another oblique angle;

[0012] Figure 3 is a perspective view of the cooperation between the first fluid passage part of the valve body and the valve core in perspective;

[0013] Figure 4 is a perspective view of the valve core structure;

[0014] Figure 5 is a perspective view of the first fluid passage part of the valve body;

[0015] In the figure: 1 valve body; 1.1 connecting column; 1.2 gap; 2 valve core; 2.1 valve core chassis; 2.2 limiting part; 3 cavity; 3.1 first fluid passage; 3.2 second fluid passage; 3.3 sealing ring. Specific embodiments

[0016] To make the purpose, principle and structure of the present utility model clearer, the following further elaborates with reference to the accompanying drawings and specific embodiments.

[0017] The present utility model provides a one-way valve, including a valve body 1 and a valve core 2.

[0018] See Figure 1 , the valve body 1 is of a split design, divided into a first fluid passage 3.1 part and a second fluid passage 3.2 part. A cavity 3 is formed inside the valve body 1, and the valve core 2 is movably arranged in the cavity 3. The first fluid passage 3.1 part and the second fluid passage 3.2 part are of a funnel-shaped structure, and the two fluid passages respectively extend towards both ends with gradually narrowing connecting nozzles, and the connecting nozzles can be cooperatively connected with an infusion tube. The two fluid passages gradually expand towards the side close to the valve core and the connection part is a stepped structure, and ultrasonic welding method can be used to realize the fixed and sealed cooperation of the two fluid passages.

[0019] See Figure 2 , Figure 3 , Figure 5 , a plurality of connecting columns 1.1 are arranged in a circumferential form at one end of the first fluid passage 3.1 of the valve body 1 towards the valve core 2, the connecting columns are arranged at intervals to form a plurality of gaps 1.2, and the diameter of the circle formed by the arrangement positions of the connecting columns 1.1 is smaller than the radius of the outermost side of the first fluid passage 3.1 of the valve core.

[0020] See Figure 2 , a sealing ring 3.3 is arranged on the second fluid passage 3.2 of the valve body 1 towards the valve core 2, the radius of the sealing ring is equal to the circumferential radius of the connecting column 1.1, and the radius of the sealing ring is smaller than the radius of the base 2.1 of the valve core 2.

[0021] See Figure 2-4, the valve core 2 is provided with a disc-shaped chassis 2.1, and the radius of the base is greater than the radius of the circumference of the connecting column 1.1 and the radius of the sealing ring 3.3. The valve core is provided with a limiting part 2.2 on the side of the first fluid passage 3.1. The limiting part 2.2 is an annular protrusion, and the radius of the limiting part is less than the radius of the circumference of the connecting part 1.1, and the limiting part 2.2 is in close contact with the connecting part 1.1. The valve core 2 can move up and down in the cavity 3, and the connecting part 1.1 and the limiting part 2.2 limit the valve core 2, so that the valve core 2 is limited in the left and right directions and can only move up and down.

[0022] When the fluid enters from one side of the first fluid passage 3.1, the fluid pressure drives the valve core 2 to move towards the second fluid passage 3.2. The valve core chassis 2.1 abuts against the sealing ring 3.3 under the fluid pressure. The radius of the chassis 2.1 is greater than the radius of the sealing ring 3.3, sealing off the cavity 3 from the second fluid passage 3.2 to achieve flow interception.

[0023] When the fluid enters from one side of the second fluid passage 3.2, the fluid pressure drives the valve core 2 to move towards the first fluid passage 3.1. The valve core chassis 2.1 abuts against the end of the connecting column 1.1 under the fluid pressure. The fluid enters the cavity 3 from the second fluid passage 3.2 and flows into the first fluid passage 3.1 through the gap 1.2 between the connecting columns 1.1 to achieve conduction.

[0024] The above two working modes together achieve the one-way conduction and one-way flow interception functions of the one-way valve, effectively preventing the reverse flow of the fluid.

[0025] The above is only the specific implementation manner of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by this utility model, according to the technical solution and the concept of this utility model, makes equivalent replacements or changes, and should be covered within the protection scope of this utility model.

Claims

1. A one-way valve, characterized in that include A valve body, wherein a cavity is provided in the middle of the valve body, one side of the cavity is connected to the first fluid channel, and the other side of the cavity is connected to the second fluid channel. The cavity is close to the first fluid channel, and a plurality of connecting columns are provided along the circumferential direction of the first fluid channel. The height of the connecting columns leaves a gap with the side of the cavity close to the second fluid channel; The valve core includes a valve core chassis and a limiting portion extending upward, the valve core chassis cooperates with the end of the connecting column, the end of the connecting column is used to limit the longitudinal movement of the valve core in the gap between the connecting column and the cavity, the valve core limiting portion cooperates with the inner side surfaces of several connecting columns, and the connecting column is used to limit the lateral movement of the valve core.

2. A one-way valve as claimed in claim 1, characterized in that A sealing ring is provided on one side of the cavity close to the second fluid channel, and the sealing ring cooperates with the valve core bottom plate for sealing.

3. A one-way valve as claimed in claim 1, characterized in that The plurality of connecting columns form a channel, the radius of the valve core bottom plate is larger than the radius of the channel, and the radius of the valve core limiting portion is smaller than the radius of the channel.

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