Butterfly valve with good sealing effect

Abstract

The invention relates to the technical field of butterfly valves, in particular to a butterfly valve with a good sealing effect. The butterfly valve comprises a butterfly valve body, a valve shaft is mounted on the surface of the butterfly valve body, an actuator is mounted on the surface of the valve shaft, a mounting frame is fixedly connected to the inner wall of the butterfly valve body, a filter screen is slidably connected to the inner wall of the mounting frame, and the filter screen is made of metal. Two mounting blocks are fixedly connected to one end of the mounting frame, threaded rods are inserted into the two mounting blocks in a threaded mode, circular shafts are fixedly connected to the ends, away from each other, of the two threaded rods, a plurality of anti-skid grooves are formed in the arc surface of each circular shaft, and a circular groove is formed in the bottom surface of the inner wall of the mounting frame. The problems that when fluid contains impurities, particles and other substances, the impurities can enter the butterfly valve along with the fluid, key components such as a valve plate and a valve seat can be abraded along with time, the valve can be possibly blocked, and normal opening and closing operation is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valves, and in particular to a butterfly valve with good sealing effect. Background Art

[0002] As a commonly used shut-off valve, butterfly valve is widely used in many fields such as petroleum, chemical industry, electric power, metallurgy, water supply and drainage, etc. It is used to control the on-off and flow regulation of fluids in pipelines. In various scenarios of today's industrial production and daily life, butterfly valves have become key equipment in the field of fluid control due to their excellent sealing effect. In the process of food and beverage processing, the good sealing performance of butterfly valves ensures that there will be no leakage in the transportation and mixing links of the product, maintaining the smoothness and hygiene of the production process.

[0003] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: when the fluid contains impurities, particles and other substances, these impurities will enter the interior of the butterfly valve along with the fluid. Over time, they will not only wear out key components such as the valve plate and valve seat, but may also cause the valve to get stuck, affecting normal opening and closing operations; therefore, a butterfly valve with good sealing effect is proposed to address the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that when the fluid contains impurities, particles and other substances, these impurities will enter the interior of the butterfly valve along with the fluid. Over time, this will not only wear out key components such as the valve plate and valve seat, but may also cause the valve to get stuck, affecting normal opening and closing operations, and to propose a butterfly valve with good sealing effect.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a butterfly valve with good sealing effect, comprising a butterfly valve body, a valve shaft is installed on the surface of the butterfly valve body, an actuator is installed on the surface of the valve shaft, a mounting frame is fixedly connected to the inner wall of the butterfly valve body, a filter screen is slidably connected to the inner wall of the mounting frame, and the filter screen is made of metal.

[0006] The effect achieved by the above components is: by arranging a filter screen made of metal material in the butterfly valve body and slidably connected to the inner wall of the mounting frame, particulate impurities in the fluid can be filtered to prevent impurities from entering the pipeline or equipment, and reduce the wear of impurities on the internal structure of the butterfly valve. The metal material enhances the strength and corrosion resistance of the filter screen and extends the service life of the filter screen.

[0007] Preferably, one end of the mounting frame is fixedly connected to two mounting blocks, and threaded rods are threadedly inserted into the two mounting blocks.

[0008] The effect achieved by the above components is that the filter screen can be conveniently tightened or loosened by rotating the threaded rod, which facilitates the installation, disassembly, cleaning and maintenance of the filter screen, and ensures the continuous effectiveness of the filtering function in the butterfly valve body.

[0009] Preferably, the ends of the two threaded rods that are away from each other are fixedly connected to a round shaft, and the arc surface of the round shaft is provided with a plurality of anti-slip grooves.

[0010] The effect achieved by the above components is: the round shaft at the end of the threaded rod is provided with an anti-slip groove, which increases the friction when the operator's hand contacts the round shaft, allowing the operator to rotate the round shaft more easily and stably, thereby driving the threaded rod to rotate, making the installation, disassembly and fixation of the filter more convenient, thereby improving the convenience of use.

[0011] Preferably, a circular groove is provided on the bottom surface of the inner wall of the mounting frame, a spring is fixedly connected to the inner wall of the circular groove, a round rod is fixedly connected to the other end of the spring, the round rod is slidably connected to the inner wall of the circular groove, and an arc plate is fixedly connected to the end of the round rod away from the spring.

[0012] The effect achieved by the above components is: by arranging the spring and the round rod in the round groove, and the round rod connecting the arc plate, the arc plate can generate elastic pressing force on the filter screen by utilizing the elasticity of the spring, thereby enhancing the stability of the filter screen during filtration.

[0013] Preferably, a plurality of circular holes are opened on the surface of the arc-shaped plate, and the plurality of circular holes are evenly distributed on the surface of the arc-shaped plate.

[0014] The effect achieved by the above components is: when the fluid passes through, the circular holes can disperse the impact force of the fluid on the arc plate, avoid excessive local force, and make the arc plate more evenly stressed during the buffering process, thereby enhancing its buffering effect and service life, while also ensuring stable support against the filter.

[0015] Preferably, one end of the filter screen is fixedly connected to a long rod.

[0016] The effect achieved by the above components is that when the filter is disassembled or assembled, the filter can be easily and accurately placed or taken out in the installation frame by holding a long pole, avoiding operational inconvenience caused by space limitations.

[0017] Preferably, a self-cleaning mechanism is also provided in the butterfly valve body, which includes an electric telescopic rod fixed on the mounting frame, the telescopic end of the electric telescopic rod is connected to a cleaning brush, the bristles of the cleaning brush are in contact with the surface of the filter, and the electric telescopic rod is controlled by an external controller and automatically started at a fixed time or according to the degree of blockage of the filter to clean the filter.

[0018] Preferably, a pressure sensor is installed on the mounting frame. The pressure sensor is located on the upstream side of the filter and is used to detect the pressure of the fluid before passing through the filter. The pressure sensor is electrically connected to an external controller. When the detected pressure difference exceeds a preset threshold, it indicates that the filter is clogged, and the controller controls the electric telescopic rod to start.

[0019] Preferably, the valve seat of the butterfly valve body adopts a multi-layer composite sealing structure, which includes a rubber sealing layer, a metal supporting layer and a corrosion-resistant coating from the inside to the outside.

[0020] Preferably, a magnetic sealing ring is provided at the connection between the valve shaft and the butterfly valve body, the magnetic sealing ring is made of magnetic material, and a magnetic material layer matching the magnetic sealing ring is provided at corresponding positions of the valve shaft and the butterfly valve body.

[0021] In summary, the beneficial effects of the present invention are: In the present invention, by arranging a filter screen made of metal material and slidably connected to the inner wall of the mounting frame in the butterfly valve body, particulate impurities in the fluid can be filtered to prevent impurities from entering the pipeline or equipment, and reduce the wear of the impurities on the internal structure of the butterfly valve. The metal material enhances the strength and corrosion resistance of the filter screen and extends the service life of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure of the filter screen in the present invention; Figure 3 For the present invention Figure 2 A magnified image of point A; Figure 4 It is a structural schematic diagram of the mounting frame in the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of part of the structure.

[0023] Legend: 1. Butterfly valve body; 2. Valve shaft; 3. Actuator; 4. Mounting bracket; 5. Filter screen; 6. Mounting block; 7. Threaded rod; 8. Round shaft; 9. Anti-slip groove; 10. Round groove; 11. Spring; 12. Round rod; 13. Arc plate; 14. Round hole; 15. Long rod. DETAILED DESCRIPTION

[0024] Reference Figure 1-Figure 5As shown, the present invention provides a technical solution: a butterfly valve with good sealing effect, comprising a butterfly valve body 1, a valve shaft 2 is installed on the surface of the butterfly valve body 1, an actuator 3 is installed on the surface of the valve shaft 2, a mounting frame 4 is fixedly connected to the inner wall of the butterfly valve body 1, a filter screen 5 is slidably connected to the inner wall of the mounting frame 4, and the filter screen 5 is made of metal. By arranging the filter screen 5 made of metal material and slidably connected to the inner wall of the mounting frame 4 in the butterfly valve body 1, particulate impurities in the fluid can be filtered to prevent impurities from entering the pipeline or equipment, and reduce the wear of the impurities on the internal structure of the butterfly valve. The metal material enhances the strength and corrosion resistance of the filter screen 5. The filter screen 5 is corrosion-resistant and prolongs the service life of the filter screen 5. One end of the mounting frame 4 is fixedly connected to two mounting blocks 6. The two mounting blocks 6 are threaded with threaded rods 7. The filter screen 5 can be conveniently tightened or loosened by rotating the threaded rods 7, which is convenient for the installation, disassembly, cleaning and maintenance of the filter screen 5, and ensures the continuous effectiveness of the filtering function in the butterfly valve body 1. The ends of the two threaded rods 7 that are away from each other are fixedly connected to a round shaft 8. The arc surface of the round shaft 8 is provided with a plurality of anti-skid grooves 9. The round shaft 8 at the end of the threaded rod 7 is provided with an anti-skid groove 9, which increases the friction when the operator's hand contacts the round shaft 8, allowing the operator to rotate more easily and stably. The circular shaft 8 drives the threaded rod 7 to rotate, making the installation, removal and fixing of the filter 5 more convenient, and improving the convenience of use. A circular groove 10 is provided on the bottom surface of the inner wall of the mounting frame 4, and a spring 11 is fixedly connected to the inner wall of the circular groove 10. The other end of the spring 11 is fixedly connected to a circular rod 12, and the circular rod 12 is slidably connected to the inner wall of the circular groove 10. An end of the circular rod 12 away from the spring 11 is fixedly connected to an arc plate 13. By arranging the spring 11 and the circular rod 12 in the circular groove 10, and the circular rod 12 is connected to the arc plate 13, the elasticity of the spring 11 can be used to make the arc plate 13 produce an elastic pressing force on the filter 5, thereby enhancing the filter 5. In order to ensure stability during filtration, a plurality of circular holes 14 are provided on the surface of the arc plate 13, and the plurality of circular holes 14 are evenly distributed on the surface of the arc plate 13. When fluid passes through, the circular holes 14 can disperse the impact force of the fluid on the arc plate 13, avoiding excessive local force, making the arc plate 13 more evenly stressed during the buffering process, thereby enhancing its buffering effect and service life, while also ensuring stable support for the filter screen 5. A long rod 15 is fixedly connected to one end of the filter screen 5. When disassembling and assembling the filter screen 5, the filter screen 5 can be easily and accurately placed or taken out of the mounting frame 4 by holding the long rod 15, avoiding inconvenience in operation due to space limitations.

[0025] In the present invention, a self-cleaning mechanism is further provided in the butterfly valve body 1, and the self-cleaning mechanism comprises an electric telescopic rod fixed on the mounting frame 4, and a cleaning brush is connected to the telescopic end of the electric telescopic rod, and the bristles of the cleaning brush are in contact with the surface of the filter 5. The electric telescopic rod is controlled by an external controller, and can be automatically started at a fixed time or according to the degree of blockage of the filter 5 to clean the filter 5 to prevent impurities from accumulating too much on the filter and affecting the filtering effect.

[0026] In the present invention, a pressure sensor is installed on the mounting frame 4, and the pressure sensor is located on the upstream side of the filter 5, and is used to detect the pressure of the fluid before passing through the filter 5. The pressure sensor is electrically connected to an external controller, and when the detected pressure difference exceeds a preset threshold, it indicates that the filter 5 is clogged, and the controller controls the electric telescopic rod to start, thereby realizing automatic cleaning of the filter 5.

[0027] In the present invention, the valve seat of the butterfly valve body 1 adopts a multi-layer composite sealing structure, which includes a rubber sealing layer, a metal supporting layer and a corrosion-resistant coating from the inside to the outside. The rubber sealing layer provides good sealing performance, the metal supporting layer enhances the structural strength of the valve seat, and the corrosion-resistant coating prevents the valve seat from being corroded by the fluid. The multi-layer structure works together to effectively improve the sealing effect and service life of the butterfly valve.

[0028] In the present invention, a magnetic sealing ring is provided at the connection between the valve shaft 2 and the butterfly valve body 1. The magnetic sealing ring is made of magnetic material, and a magnetic material layer matching the magnetic sealing ring is provided at the corresponding positions of the valve shaft 2 and the butterfly valve body 1. When the valve shaft 2 rotates, the magnetic attraction between the magnetic sealing ring and the valve shaft 2 and the butterfly valve body 1 can form a sealing barrier to prevent fluid leakage, while reducing the friction resistance when the valve shaft 2 rotates, thereby improving the operational flexibility of the butterfly valve.

[0029] Working principle: when the butterfly valve body 1 is in operation, the fluid flows through the butterfly valve body 1, and the filter screen 5 made of metal material and slidably connected to the inner wall of the mounting frame 4 will filter the fluid flowing through, block particulate impurities, prevent them from entering the pipeline or equipment, and reduce the wear on the internal structure of the butterfly valve. The threaded rod 7 with internal threads inserted in the two mounting blocks 6 at one end of the mounting frame 4 can tighten or loosen the filter screen 5 by rotating the threaded rod 7. The anti-skid groove 9 on the round shaft 8 at its end facilitates the operator to rotate the round shaft 8 to drive the threaded rod 7 to operate, thereby improving the convenience of installation, disassembly and fixing. The spring 11 and the round rod 12 in the round groove 10 on the bottom surface of the inner wall of the mounting frame 4 and the connected arc plate 13 use the elasticity of the spring 11 to make the arc plate 13 produce an elastic pressing force on the filter screen 5, thereby enhancing the stability of the filter screen 5 during filtration. The circular holes 14 evenly distributed on the surface of the arc plate 13 disperse the fluid impact force, so that the arc plate 13 is evenly stressed, ensuring the buffering effect and service life, while ensuring stable pressing against the filter screen 5. When installing or removing the filter 5, the long rod 15 fixed at one end of the filter 5 can be held to easily and accurately place or take out the filter 5 in the mounting frame 4, thus overcoming the inconvenience caused by space limitation.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

Claims

1. A butterfly valve with good sealing effect, comprising a butterfly valve body (1), characterized in that: A valve shaft (2) is mounted on the surface of the butterfly valve body (1), an actuator (3) is mounted on the surface of the valve shaft (2), a mounting frame (4) is fixedly connected to the inner wall of the butterfly valve body (1), a filter screen (5) is slidably connected to the inner wall of the mounting frame (4), and the filter screen (5) is made of metal; A circular groove (10) is formed on the bottom surface of the inner wall of the mounting frame (4); a spring (11) is fixedly connected to the inner wall of the circular groove (10); a round rod (12) is fixedly connected to the other end of the spring (11); the round rod (12) is slidably connected to the inner wall of the circular groove (10); and an arc-shaped plate (13) is fixedly connected to one end of the round rod (12) away from the spring (11).

2. A butterfly valve with good sealing effect according to claim 1, characterized in that: One end of the mounting frame (4) is fixedly connected to two mounting blocks (6), and threaded rods (7) are threadedly inserted into the two mounting blocks (6).

3. A butterfly valve with good sealing effect according to claim 2, characterized in that: The ends of the two threaded rods (7) that are away from each other are both fixedly connected to a circular shaft (8), and the circular arc surface of the circular shaft (8) is provided with a plurality of anti-slip grooves (9).

4. A butterfly valve with good sealing effect according to claim 1, characterized in that: A plurality of circular holes (14) are provided on the surface of the arc-shaped plate (13), and the plurality of circular holes (14) are evenly distributed on the surface of the arc-shaped plate (13).

5. A butterfly valve with good sealing effect according to claim 1, characterized in that: One end of the filter screen (5) is fixedly connected to a long rod (15).

6. A butterfly valve with good sealing effect according to claim 1, characterized in that: The butterfly valve body (1) is also provided with a self-cleaning mechanism, which comprises an electric telescopic rod fixed on the mounting frame (4), the telescopic end of the electric telescopic rod being connected to a cleaning brush, the bristles of the cleaning brush being in contact with the surface of the filter screen (5), the electric telescopic rod being controlled by an external controller and automatically started at a fixed time or according to the degree of blockage of the filter screen (5), so as to clean the filter screen (5).

7. A butterfly valve with good sealing effect according to claim 6, characterized in that: A pressure sensor is mounted on the mounting frame (4). The pressure sensor is located on the upstream side of the filter (5) and is used to detect the pressure of the fluid before it passes through the filter (5). The pressure sensor is electrically connected to an external controller. When the detected pressure difference exceeds a preset threshold, it indicates that the filter (5) is clogged, and the controller controls the electric telescopic rod to start.

8. A butterfly valve with good sealing effect according to claim 1, characterized in that: The valve seat of the butterfly valve body (1) adopts a multi-layer composite sealing structure, which comprises a rubber sealing layer, a metal support layer and a corrosion-resistant coating from the inside to the outside.

9. A butterfly valve with good sealing effect according to claim 1, characterized in that: A magnetic sealing ring is provided at the connection between the valve shaft (2) and the butterfly valve body (1); the magnetic sealing ring is made of magnetic material; and a magnetic material layer matching the magnetic sealing ring is provided at corresponding positions of the valve shaft (2) and the butterfly valve body (1).

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