Sealed anti-crystallization butterfly valve

Abstract

The utility model discloses a sealing anti-crystallization butterfly valve, belongs to the technical field of butterfly valves, and solves the problems that solid crystals on a valve seat can cause structural damage to the valve seat and a valve plate when the valve seat and the valve plate are subjected to hard sealing, and then the sealing effect between the valve seat and the valve plate is influenced. Comprising a valve body, a valve plate rotationally connected into the valve body and a valve seat fixedly connected to an inner ring of the valve body, and a plurality of horizontal air grooves evenly arranged at intervals and vertical air grooves communicated with the horizontal air grooves are formed in the valve plate. In the process that the valve plate blocks the valve body, external air is introduced by starting the air pump, sequentially passes through the connecting air pipe, the air channel and the vertical air groove and is finally sprayed out through the air spraying holes in the two ends of the horizontal air groove, the air expands outwards when being sprayed out and keeps a high-speed flowing state, and when the valve plate is close to the valve seat, high-speed air flow impacts the valve seat and the end face of the valve plate, so that the valve body is blocked. Crystallized solid particles on the valve seat are effectively removed, and solid particles accumulated on the valve plate due to fluid scouring are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a sealed anti-crystallization butterfly valve. Background Art

[0002] The butterfly valve is a valve with a simple structure and convenient operation. It controls the flow rate and direction of the medium in the pipeline by rotating the butterfly plate. The butterfly plate is usually located in the center of the pipeline, perpendicular to the diameter of the pipeline. When the butterfly plate is fully opened, the flow area of ​​the pipeline is the largest and the fluid resistance is the smallest. The characteristics of the butterfly valve are small size, light weight, fast opening and closing, and convenient flow adjustment. It is suitable for the control of water, air, steam, oil and some corrosive media. The butterfly valve has good sealing performance, but it is not suitable for high pressure or high viscosity media. In addition, the butterfly valve also has the advantages of compact structure, easy maintenance, and reliable sealing. It is widely used in petroleum, chemical, metallurgy, hydropower and other industries.

[0003] When the current butterfly valve closes the valve body, it usually needs to cooperate with the valve seat in the inner circle of the valve body to achieve a hard seal, thereby completing the blockage of the flow channel in the valve body and maintaining a good sealing effect. When the butterfly valve is transporting fluid, the fluid will adhere to the valve seat during the process, and then a clean situation will occur. As a result, the solid crystals on the valve seat will cause structural damage to the valve seat and the valve plate when they are hard sealed, thereby affecting the sealing effect between the two.

[0004] Therefore, a sealed anti-crystallization butterfly valve is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a sealed anti-crystallization butterfly valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A sealed anti-crystallization butterfly valve comprises a valve body, a valve plate rotatably connected to the valve body, and a valve seat fixedly connected to the inner ring of the valve body, wherein the valve plate is provided with a plurality of evenly spaced horizontal air grooves and a vertical air groove connecting the plurality of horizontal air grooves, the valve body is provided with an air passage connected to the vertical air grooves, and the valve plate is rotatably connected to the valve body at the connection point, the air passage is connected to an air pump via a connecting air pipe, and both ends of the horizontal air grooves are provided with air injection holes arranged opposite to the valve seat.

[0008] Preferably, the opening cross-sectional area of ​​the air injection hole is larger than the opening cross-sectional area of ​​the horizontal air groove.

[0009] Preferably, a rotatably connected connecting pipe is embedded at the junction of the vertical air groove and the air channel.

[0010] Preferably, it also includes a valve stem, which is fixedly connected to the upper end of the valve plate and penetrates the valve body.

[0011] Preferably, it also includes a connecting seat fixedly connected to the valve body and communicated with the valve body, the top surface of the connecting seat is fixedly connected to a flange seat, the flange seat is fixedly connected to a casing, the top surface of the casing is fixedly connected to a servo motor, the output shaft of the servo motor passes through the casing, the valve stem passes through the connecting seat to the casing, and the valve stem and the output shaft of the servo motor are connected by a coupling.

[0012] Preferably, it also includes a connecting flange, which is fixedly connected to the end surface of the valve body.

[0013] The utility model has the following beneficial effects:

[0014] The utility model introduces outside air by starting the air pump during the process of the valve plate blocking the valve body, and the air passes through the connecting air pipe, the airway, and the vertical air groove in sequence, and is finally ejected through the air jet holes at both ends of the horizontal air groove. The air expands outward when ejected, and maintains a high-speed flow state. When the valve plate and the valve seat are close to each other, the high-speed airflow impacts the valve seat and the end face of the valve plate, effectively removing the crystallized solid particles on the valve seat, reducing the solid particles accumulated on the valve plate due to the scouring of the fluid, avoiding the collision of the crystal particles when the valve plate and the valve seat are fitted, preventing the damage of the valve seat or the valve plate, and ensuring the stability of the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a partial cross-sectional view of the utility model;

[0017] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0018] Figure 4 It is a cross-sectional view of the valve plate in the utility model;

[0019] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0020] 1. Valve body; 2. Connecting flange; 3. Connecting seat; 4. Flange seat; 5. Casing; 6. Servo motor; 7. Valve plate; 8. Valve seat; 9. Connecting air pipe; 10. Jet hole; 11. Air duct; 12. Vertical air groove; 13. Horizontal air groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Sealed anti-crystallization butterfly valve, such as Figure 1 and 2 As shown, it includes a valve body 1, a valve plate 7 rotatably connected to the valve body 1, a valve seat 8 fixedly connected to the inner ring of the valve body 1, a valve stem, a connecting seat 3 fixedly connected to the valve body 1 and communicated with the valve body 1, and a connecting flange 2. The valve stem is fixedly connected to the upper end of the valve plate 7 and penetrates the valve body 1. The top surface of the connecting seat 3 is fixedly connected to the flange seat 4. The flange seat 4 is fixedly connected to the casing 5. The top surface of the casing 5 is fixedly connected to a servo motor 6. The output shaft of the servo motor 6 penetrates into the casing 5. The valve stem penetrates the connecting seat 3 to the casing 5. The valve stem and the output shaft of the servo motor 6 are connected by a coupling. The connecting flange 2 is fixedly connected to the end surface of the valve body 1.

[0023] like Figure 3-5 As shown, a plurality of evenly spaced horizontal air grooves 13 and vertical air grooves 12 connecting the plurality of horizontal air grooves 13 are provided in the valve plate 7, an air channel 11 connecting the vertical air grooves 12 is provided in the valve body 1, and the valve plate 7 is rotatably connected to the valve body 1 at the connection point, a rotatably connected connecting pipe is embedded at the junction of the vertical air grooves 12 and the air channel 11, the air channel 11 is connected to an air pump through a connecting air pipe 9, and jet holes 10 arranged opposite to the valve seat 8 are provided at both ends of the horizontal air grooves 13, and the opening cross-sectional area of ​​the jet holes 10 is larger than the opening cross-sectional area of ​​the horizontal air grooves 13.

[0024] The utility model can drive the outside air to leave from the jet holes 10 at both ends of the horizontal air grooves 13 in the process of the valve plate 7 blocking the inside of the valve body 1 by starting the air pump in the order of the connecting air pipe 9, the air channel 11, the vertical air groove 12, and the plurality of horizontal air grooves 13, and because the opening cross-sectional area of ​​the jet holes 10 is larger than the opening cross-sectional area of ​​the horizontal air grooves 13, the high-speed flowing air can show a trend of outward expansion when flowing outward from the jet holes, and because the volume of the horizontal air grooves 13 is larger than the volume of the jet holes 10, the air leaving from the jet holes 10 still maintains a high-speed and outward expansion state, so that the utility model can be used for the utility model. When the valve plate 7 and the valve seat 8 are close to each other, the air can impact on the end surfaces of the valve seat 8 and the valve plate 7 facing each other. Since the valve plate 7 usually needs to be flushed by the fluid, the possibility of crystalline solid particles remaining on the valve plate 7 is much smaller than the possibility of crystalline solid particles existing on the valve seat 8. Then, under the guidance of the air quickly ejected from the jet hole 10 on the valve plate 7, the crystalline solid that may exist on the valve seat 8 will fall down. When the valve plate 7 and the valve seat 8 are fitted together, there will be no possibility of collision between the crystalline particles and the two, thereby avoiding the problem of collision damage to the valve seat 8 or the valve plate 7 and ensuring the sealing effect between the two.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Sealed anti-crystallization butterfly valve, characterized in that: The invention comprises a valve body (1), a valve plate (7) rotatably connected to the inside of the valve body (1), and a valve seat (8) fixedly connected to the inner ring of the valve body (1); the valve plate (7) is provided with a plurality of horizontal air grooves (13) evenly spaced apart, and a vertical air groove (12) connecting the plurality of horizontal air grooves (13); the valve body (1) is provided with an air channel (11) connected to the vertical air grooves (12); the valve plate (7) is rotatably connected to the valve body (1) at the connection point; the air channel (11) is connected to an air pump via a connecting air pipe (9); and both ends of the horizontal air groove (13) are provided with air injection holes (10) arranged opposite to the valve seat (8).

2. The sealed anti-crystallization butterfly valve according to claim 1, characterized in that: The opening cross-sectional area of ​​the air injection hole (10) is larger than the opening cross-sectional area of ​​the horizontal air groove (13).

3. The sealed anti-crystallization butterfly valve according to claim 1, characterized in that: A rotatably connected connecting pipe is embedded at the junction of the vertical air groove (12) and the air channel (11).

4. The sealed anti-crystallization butterfly valve according to claim 1, characterized in that: It also comprises a valve stem, which is fixedly connected to the upper end of the valve plate (7) and penetrates the valve body (1).

5. The sealed anti-crystallization butterfly valve according to claim 4, characterized in that: It also comprises a connecting seat (3) fixedly connected to the valve body (1) and in communication therewith, the top surface of the connecting seat (3) being fixedly connected to a flange seat (4), the flange seat (4) being fixedly connected to a housing (5), the top surface of the housing (5) being fixedly connected to a servo motor (6), the output shaft of the servo motor (6) passing through the housing (5), the valve stem passing through the connecting seat (3) into the housing (5), and the valve stem and the output shaft of the servo motor (6) being connected by a coupling.

6. The sealed anti-crystallization butterfly valve according to claim 1, characterized in that: It also comprises a connecting flange (2), wherein the connecting flange (2) is fixedly connected to the end surface of the valve body (1).

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