Butterfly valve

Abstract

The utility model discloses a butterfly valve which comprises a valve body, a flow channel for fluid to pass through is formed in the valve body, one end of the flow channel is an inlet end, the other end of the flow channel is an outlet end, a valve seat and a butterfly plate matched with the valve seat are arranged in the flow channel, and a valve rod connected with the butterfly plate and an actuator for controlling the valve rod to rotate are arranged on the valve body. The butterfly valve is characterized in that the valve rod comprises a fixing section and a connecting section connected with the butterfly plate, the fixing section is connected to the two ends of the connecting section, connected with the actuator and fixed to the bottom of the valve body respectively, a driving piece is arranged on the fixing section, a driving groove located at the inlet end is formed in the flow channel, and the driving piece is arranged in the driving groove. The connecting section slides between the two fixing sections, and when the valve body is cut off, the driving piece drives the connecting section to extrude towards the valve seat. The utility model has the following advantages and effects: when the valve is cut off, the butterfly plate is pressed by using the pressure on one side, so that the sealing property of the butterfly plate is ensured.

Description

Technical Field

[0001] The utility model relates to the field of valves, and more particularly to a butterfly valve that is easy to open. Background Art

[0002] Butterfly valves mainly play the role of cutting off and throttling in pipelines. The emergence of butterfly valves has brought great convenience to industries such as hydraulic power, power generation and water treatment. However, there are still some defects in the specific use of butterfly valves.

[0003] Butterfly valves can often only be opened and closed by manually operating the operating hand plate on the top. In addition, when the existing butterfly valve is cut off, the pressure on one side of the valve body is relatively high, and the sealing performance of the valve disc is insufficient. Therefore, there is an urgent need for a butterfly valve structure that can enhance the sealing performance of the butterfly valve when it is cut off. Utility Model Content

[0004] The utility model provides a butterfly valve with strong sealing performance. The valve enhances the sealing performance of the butterfly valve through a bypass.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a butterfly valve, comprising a valve body, a flow channel for fluid to pass through formed in the valve body, one end of the flow channel being an inlet end, and the other end being an outlet end, a valve seat and a butterfly plate cooperating with the valve seat are arranged in the flow channel, a valve stem connected to the butterfly plate and an actuator for controlling the rotation of the valve stem are provided on the valve body, and the characteristic is that: the valve stem comprises a fixed section and a connecting section connecting the butterfly plate, the fixed section is connected to the two ends of the connecting section and is respectively connected to the actuator and fixed to the bottom of the valve body, a driving member is provided on the fixed section, a driving groove is provided at one end of the inlet end on the flow channel, the driving member is arranged in the driving groove, the connecting section slides between the two fixed sections, and when the valve body is cut off, the driving member drives the connecting section to be squeezed toward the valve seat.

[0006] The utility model is further configured as follows: a sliding groove is formed on one side of the connecting section, and when the valve body is cut off, a sliding gap is formed between the sliding groove on the connecting section and the valve body for the connecting section to slide.

[0007] The utility model is further configured as follows: a sliding recess is formed on the fixed section, a sliding block is protruded from the connecting section and inserted into the sliding recess, and an elastic member connecting the sliding block and the sliding recess is further provided in the sliding recess.

[0008] The utility model is further configured as follows: the elastic member includes an elastic protrusion and an elastic block, the elastic protrusion is arranged in the sliding recess, the elastic block slides on the elastic protrusion, and a first spring connected to the elastic block is arranged in the elastic protrusion.

[0009] The utility model is further configured as follows: a driving block opposite to the sliding block is provided on the fixed section, an opening groove communicating with the outside and the elastic groove is opened on the fixed section, the driving block slides in the opening groove, and the driving member drives the driving block to move and drives the connecting section to move

[0010] The utility model is further configured as follows: extrusion protrusions protrude from both ends of the fixing member, and a clamping groove is recessed on the valve body. When the extrusion protrusions are clamped in the clamping grooves, a sealing gap of an extrusion sealing section is formed between the fixing member and the valve body.

[0011] The utility model is further configured as follows: the driving member includes a driving groove, a driving slider is provided in the driving groove, a driving rod is provided at one end of the driving slider, and when the driving slider moves, the driving rod drives the butterfly plate to be close to the valve seat.

[0012] The utility model is further configured as follows: a sealing ring is provided on the outer periphery of the driving slider, and a second spring is sleeved on the driving rod.

[0013] The utility model has the following effects: when the valve is cut off, the driving member is driven by the pressure on one side of the inlet end, and the connecting section is offset, so that the pressure on one side of the inlet end can drive the butterfly plate to press the valve body, effectively enhancing the sealing ability of the valve when it is cut off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0015] Figure 2 This is an enlarged view of part A;

[0016] Figure 3 This is a structural schematic diagram of the valve stem fixing part and the connecting part of the utility model.

[0017] In the figure: 1. valve body; 2. butterfly plate; 32. connecting section; 33. fixed section; 34. sliding gap; 4. sliding recess; 41. sliding block; 51. elastic protrusion; 52. elastic block; 53. first spring; 54. driving block; 6. driving groove; 61. driving slider; 62. driving rod; 63. sealing ring; 64. second spring. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0019] 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 positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on 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.

[0020] Reference Figures 1 to 3 The embodiments of the present invention are further described.

[0021] A butterfly valve comprises a valve body 1, wherein a flow channel for fluid to pass through is formed in the valve body 1, wherein one end of the flow channel is an inlet end and the other end is an outlet end, a valve seat and a butterfly plate 2 cooperating with the valve seat are arranged in the flow channel, and a valve stem connected to the butterfly plate 2 and an actuator for controlling the rotation of the valve stem are provided on the valve body 1, wherein the valve stem comprises a fixed section 33 and a connecting section 32 connected to the disc plate, the fixed section 33 is connected to both ends of the connecting section 32 and is respectively connected to the actuator and fixed to the bottom of the valve body 1, a driving member is provided on the fixed section 33, a driving groove 6 is provided on the flow channel at one end of the inlet end, the driving member is arranged in the driving groove 6, the connecting section 32 slides between the two fixed sections 33, and when the valve body 1 is cut off, the driving member drives the connecting section 32 to be squeezed toward the valve seat. When the valve is cut off, the pressure on the inlet side drives the driving member, and the connecting section 32 is offset, so that the pressure on the inlet side can drive the butterfly plate 2 to press the valve body 1, effectively enhancing the sealing ability of the valve when it is cut off.

[0022] One side of the connecting section 32 is recessed to form a sliding groove. When the valve body 1 is cut off, a sliding gap 34 is formed between the sliding groove on the connecting section 32 and the valve body 1 for the connecting section 32 to slide. The sliding gap 34 allows the connecting section 32 to deflect during cutting, and prevents the connecting section 32 from contacting the valve body 1.

[0023] A sliding recess 4 is formed on the fixed section 33, and a sliding block 41 is protruded from the connecting section 32 and inserted into the sliding recess 4. An elastic member connecting the sliding block 41 and the sliding recess 4 is also provided in the sliding recess 4. The setting of the elastic member ensures that the connecting section 32 and the fixed section 33 are not offset when used, and when cut off, the connecting section 32 can be offset and squeezed toward the valve seat under the action of pressure.

[0024] The elastic member includes an elastic protrusion 51 and an elastic block 52. The elastic protrusion 51 is arranged in the sliding recess 4. The elastic block 52 slides on the elastic protrusion 51. A first spring 53 connected to the elastic block 52 is arranged in the elastic protrusion 51 to facilitate automatic reset between the connecting section 32 and the fixed section 33 when opening.

[0025] The fixed section 33 is provided with a driving block 54 opposite the sliding block 41. An opening is provided on the fixed section 33, connecting the elastic groove with the outside world. The driving block 54 slides within the opening. The driving member drives the driving block 54 and the connecting section 32, facilitating actuation and avoiding the risk of jamming compared to direct contact with the sliding block 41.

[0026] The driving member includes a driving groove 6, in which a driving slider 61 is provided. A driving rod 62 is provided at one end of the driving slider 61. When the driving slider 61 moves, the driving rod 62 drives the butterfly plate 2 to be close to the valve seat, and the pressure drives the driving slider 61 to move. The driving rod 62 drives the driving block 54 to move, and then drives the connecting section 32 to deviate toward the valve seat.

[0027] A sealing ring 63 is provided on the outer periphery of the driving slider 61 , and a second spring 64 is sleeved on the driving rod 62 , thereby ensuring sealing and facilitating resetting.

[0028] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A butterfly valve, comprising a valve body, wherein a flow channel for fluid to pass therethrough is formed in the valve body, wherein one end of the flow channel is an inlet end and the other end is an outlet end, wherein a valve seat and a butterfly plate cooperating with the valve seat are provided in the flow channel, wherein the valve body is provided with a valve stem connected to the butterfly plate and an actuator for controlling the rotation of the valve stem, wherein the valve body is provided with: The valve stem includes a fixed section and a connecting section connected to the disc plate. The fixed section is connected to both ends of the connecting section and is respectively connected to the actuator and fixed to the bottom of the valve body. A driving member is provided on the fixed section. A driving groove located at one end of the inlet end is provided on the flow channel. The driving member is provided in the driving groove. The connecting section slides between the two fixed sections. When the valve body is cut off, the driving member drives the connecting section to be squeezed toward the valve seat.

2. A butterfly valve according to claim 1, characterized in that: One side of the connecting section is recessed to form a sliding groove. When the valve body is cut off, a sliding gap is formed between the sliding groove on the connecting section and the valve body for the connecting section to slide.

3. A butterfly valve according to claim 2, characterized in that: A sliding recess is formed on the fixed section, a sliding block protrudes from the connecting section and is inserted into the sliding recess, and an elastic member connecting the sliding block and the sliding recess is further provided in the sliding recess.

4. A butterfly valve according to claim 3, characterized in that: The elastic member includes an elastic protrusion and an elastic block. The elastic protrusion is arranged in the sliding recess. The elastic block slides on the elastic protrusion. A first spring connected to the elastic block is arranged in the elastic protrusion.

5. A butterfly valve according to claim 4, characterized in that: The fixed section is provided with a driving block opposite to the sliding block. The fixed section is provided with an open groove connecting the outside and the elastic groove. The driving block slides in the open groove, and the driving member drives the driving block to move and drives the connecting section to move.

6. The butterfly valve according to claim 3, characterized in that: The driving member includes a driving groove, a driving slider is provided in the driving groove, and a driving rod is provided at one end of the driving slider. When the driving slider moves, the driving rod drives the butterfly plate to be close to the valve seat.

7. The butterfly valve according to claim 6, characterized in that: A sealing ring is provided on the outer periphery of the driving slider, and a second spring is sleeved on the driving rod.

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