High-sealing check valve

Abstract

The utility model discloses a high-sealing check valve which comprises a valve body, a cut-off face is formed in the valve body, a valve clack is arranged in the valve body, a valve rod which is connected with the valve clack and drives the valve clack to cut off is arranged on the valve body, an actuator which is connected with the valve rod is arranged on the valve body, and a sealing piece which is connected with the valve clack is arranged in the valve body. The sealing piece comprises a sealing sleeve and a driving piece, the sealing sleeve is arranged on the valve rod in a sliding and sleeving mode and slides on the valve rod, one end of the sealing sleeve extends to the flow channel, when the actuator drives the valve clack to conduct cutting-off, the driving piece drives the sealing sleeve to move to abut against the valve clack, the driving piece comprises a driving sleeve, the driving sleeve slides on the valve body, and the driving sleeve drives the sealing sleeve to abut against the valve clack. One end of the driving sleeve is located outside, and the driving sleeve is in threaded connection with the valve body. The valve has the advantages that the sealing sleeve is arranged, when the valve clack is sealed, the sealing sleeve can abut against the valve clack, and the sealing performance of the valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of valves, and more specifically, it relates to a high-sealing check valve. Background Art

[0002] A check valve refers to a valve in which the closing member is a circular valve flap and the valve flap moves by its own weight and the pressure of the medium to block the reverse flow of the medium. It belongs to the category of automatic valves and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The movement mode of the valve flap is divided into a lifting type and a swing type.

[0003] After the current check valve is closed, the valve flap will be impacted and pressured by the fluid. Especially after long-term use, leakage is likely to occur at the valve flap, affecting the normal use of the valve. Therefore, the sealing performance of the valve is particularly crucial. Summary of the Utility Model

[0004] The utility model provides a high-sealing check valve, aiming to solve the problem of weak sealing performance of the existing globe valve.

[0005] To achieve the above object, the utility model provides the following technical solution: A high-sealing check valve includes a valve body. A cut-off surface is formed inside the valve body, and a valve flap is provided. A valve stem is provided on the valve body to connect the valve flap and drive the valve flap to perform cutting. An actuator is provided on the valve body to connect the valve stem. The feature is that a sealing member connecting the valve flap is provided inside the valve body. The sealing member includes a sealing sleeve and a driving member. The sealing sleeve is slidably sleeved and slides on the valve stem. One end of the sealing sleeve extends to the flow channel. When the actuator drives the valve flap to perform cutting, the driving member drives the sealing sleeve to move to abut against the valve flap. The driving member includes a driving sleeve. The driving sleeve slides on the valve body. One end of the driving sleeve is located outside, and the driving sleeve is threadedly connected to the valve body.

[0006] The utility model has the following effects: When the valve flap performs cut-off, the driving sealing sleeve abuts tightly, so that the sealing sleeve presses the valve flap, further strengthening the sealing effect of the valve flap. At the same time, the double structure has better sealing.

[0007] The utility model is further: A rotating part is formed at one end of the driving sleeve located outside. A plurality of locking holes are provided on the rotating part. A clamping rod and a return spring are provided in the locking holes. The return spring connects the clamping rod and drives it towards the valve body direction. A clamping groove matching the clamping rod is recessed on the valve body.

[0008] The utility model has the following effects: It can be automatically clamped and fixed after rotation to prevent the driving sleeve from rotating back. At the same time, a return spring is provided to drive the clamping rod to clamp the clamping groove.

[0009] The present utility model is further configured as follows: a limiting protrusion is formed on the valve body, and a limiting recess mating with the limiting protrusion is recessed on the rotating part.

[0010] The present utility model has the following effects: the limiting protrusion and the limiting recess cooperate with each other, enabling better clamping and positioning during installation.

[0011] The present utility model is further configured as follows: a driving part is formed at one end of the sealing sleeve close to the driving sleeve, a sliding groove for the driving part to slide is formed in the valve body, and a driving spring connecting the driving part is arranged in the sliding groove.

[0012] The present utility model has the following effects: the above structure enables the sealing sleeve to reset, and the structure is simple and practical.

[0013] The present utility model is further configured as follows: a sealing edge is arranged in the sliding groove, a sealing gap is formed between the sealing edge and the valve body, the driving spring is located in the sealing gap, and when the sealing sleeve moves downward, the driving part presses the sealing edge and drives the sealing edge to deform.

[0014] The present utility model has the following effects: the provision of the sealing edge can deform when the sealing sleeve moves, closely adhering between the sealing sleeve and the valve body, ensuring the sealing performance between the two.

[0015] The present utility model is further configured as follows: a sealing ring is arranged in the sliding groove between the driving part and the driving sleeve, a limiting protrusion protrudes in the direction of the driving sleeve on the driving part, and the sealing ring is sleeved on the valve stem.

[0016] The present utility model has the following effects: ensuring the sealing performance between the two and ensuring no leakage. Description of the Drawings

[0017] Figure 1 is a structural diagram of an embodiment of the present utility model;

[0018] Figure 2 is an enlarged view of part A.

[0019] In the figure: 1, valve body; 2, sealing sleeve; 3, driving sleeve; 31, rotating part; 32, locking hole; 21, clamping rod; 22, return spring; 23, driving part; 24, driving spring; 4, limiting protrusion; 5, sliding groove; 6, sealing edge; 7, sealing ring. Detailed Description of the Invention

[0020] The technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] Refer to Figures 1 to 2 A further description will be made of the embodiments of the present utility model.

[0023] A highly sealed check valve includes a valve body 1. A cut-off surface is formed inside the valve body 1, and a valve flap is provided. A valve stem is provided on the valve body 1 to connect the valve flap and drive the valve flap to cut off. An actuator is provided on the valve body 1 to connect the valve stem. A sealing member is provided inside the valve body 1 to connect the valve flap. The sealing member includes a sealing sleeve 2 and a driving member. The sealing sleeve 2 is slidably sleeved and slides on the valve stem. One end of the sealing sleeve 2 extends to the flow channel. When the actuator drives the valve flap to cut off, the driving member drives the sealing sleeve 2 to move to abut against the valve flap. The driving member includes a driving sleeve 3. The driving sleeve 3 slides in the valve body 1. One end of the driving sleeve 3 is located outside, and the driving sleeve 3 is threadedly connected to the valve body 1. When the valve flap is closed, when the driving sealing sleeve 2 abuts tightly, the sealing sleeve 2 presses the valve flap, further strengthening the sealing effect of the valve flap. At the same time, the double structure has a better sealing effect.

[0024] When the valve flap is closed, when the driving sealing sleeve 2 abuts tightly, the sealing sleeve 2 presses the valve flap, further strengthening the sealing effect of the valve flap. At the same time, the double structure has a better sealing effect.

[0025] A rotating part 31 is formed at one end of the driving sleeve 3 located outside. A plurality of locking holes 32 are provided on the rotating part 31. A clamping rod 21 and a return spring 22 are provided in the locking holes 32. The return spring 22 connects the clamping rod 21 and drives it towards the valve body 1. A clamping groove for cooperating with the clamping rod 21 is recessed on the valve body 1. It can be automatically clamped and fixed after rotation to prevent the driving sleeve 3 from rotating back. At the same time, a return spring 22 is provided to drive the clamping rod 21 to clamp the clamping groove.

[0026] A limiting projection 4 is formed on the valve body 1, and a mating limiting recess is recessed on the rotating part 31. The limiting projection 4 and the limiting recess cooperate with each other, enabling better clamping in place during installation.

[0027] One end of the sealing sleeve 2 close to the driving sleeve 3 is formed with a driving part 23. A sliding groove 5 for the driving part 23 to slide is formed in the valve body 1, and a driving spring 24 connecting the driving part 23 is arranged in the sliding groove 5. The above structure enables the sealing sleeve 2 to reset, and the structure is simple and practical.

[0028] A sealing edge 6 is arranged in the sliding groove 5. A sealing gap is formed between the sealing edge 6 and the valve body 1. The driving spring 24 is located in the sealing gap. When the sealing sleeve 2 moves downward, the driving part 23 presses the sealing edge 6 and drives the sealing edge 6 to deform. The arrangement of the sealing edge 6 can deform when the sealing sleeve 2 moves and closely adhere to between the sealing sleeve 2 and the valve body 1, ensuring the sealing performance between the two.

[0029] A sealing ring 7 is arranged in the sliding groove 5 between the driving part 23 and the driving sleeve 3. A limiting projection 4 protrudes from the driving part 23 towards the driving sleeve 3. The sealing ring 7 is sleeved on the valve stem. Ensure the sealing between the two and ensure no leakage.

[0030] This specific embodiment is only an explanation of the present invention, and it is not a limitation to the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A highly sealed check valve, comprising a valve body. A cut-off surface is formed inside the valve body, and a valve flap is provided. A valve stem is provided on the valve body to connect the valve flap and drive the valve flap to perform cutting. An actuator is provided on the valve body to connect the valve stem, and it is characterized in that: A seal is provided inside the valve body and is connected to the valve flap. The seal includes a sealing sleeve and a driving member. The sealing sleeve is slidably sleeved and slides on the valve stem. One end of the sealing sleeve extends into the flow passage. When the actuator drives the valve flap to cut off, the driving member drives the sealing sleeve to move to abut against the valve flap. The driving member includes a driving sleeve. The driving sleeve slides in the valve body. One end of the driving sleeve is located outside, and the driving sleeve is threadedly connected to the valve body.

2. The high-sealing check valve according to claim 1, characterized in that: A rotating portion is formed at one end of the driving sleeve located outside. A number of locking holes are provided on the rotating portion. A clamping rod and a return spring are provided in the locking holes. The return spring connects the clamping rod and drives it towards the valve body direction. A clamping groove for cooperating with the clamping rod is recessed on the valve body.

3. The high-sealing check valve according to claim 2, characterized in that: A limiting protrusion is formed on the valve body, and a limiting recess for cooperating with it is recessed on the rotating portion.

4. A highly sealed check valve according to claim 1, characterized in that: A driving portion is formed at one end of the sealing sleeve close to the driving sleeve. A sliding groove for the driving portion to slide is formed in the valve body. A driving spring connecting the driving portion is provided in the sliding groove.

5. The high-sealing check valve according to claim 4, characterized in that: A sealing edge is provided in the sliding groove. A sealing gap is formed between the sealing edge and the valve body. The driving spring is located in the sealing gap. When the sealing sleeve moves downwards, the driving portion presses the sealing edge and drives the sealing edge to deform.

6. The high-sealing check valve according to claim 5, characterized in that: A sealing ring is provided in the sliding groove between the driving portion and the driving sleeve. A limiting protrusion protrudes in the direction of the driving sleeve on the driving portion. The sealing ring is sleeved on the valve stem.

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