Butterfly valve with high reliability

Abstract

The utility model provides a butterfly valve with high reliability, and relates to the technical field of butterfly valves. The butterfly valve with the high reliability comprises a valve body, a butterfly plate is arranged in the valve body, an air groove is formed in the butterfly plate, the outer end of the butterfly plate is connected with a sealing ring, a valve shaft is connected into the butterfly plate, an air inlet hole and an exhaust hole are formed in the valve shaft, and an air inlet pipe is arranged at the upper end of the valve shaft. According to the butterfly valve with the high reliability, the heater is arranged, gas in the gas inlet pipe can be heated by starting the heater, so that hot gas is injected into the gas groove to heat the sealing ring, and the problems that the elasticity is reduced and the sealing performance is reduced due to the fact that the temperature of the sealing ring is too low are solved; and the exhaust speed of the exhaust hole can be adjusted through the electric push rod and the adjusting block, so that it is guaranteed that the air pressure in the air groove is stable, the sealing ring can be expanded while being heated, the device can still effectively prevent medium leakage under the action of a low-temperature environment and a low-temperature medium, and the reliability of the device is high.

Description

Technical Field

[0001] This utility model relates to a valve, specifically a highly reliable butterfly valve, belonging to the field of butterfly valve technology. Background Technology

[0002] A butterfly valve is a simple regulating valve mainly used for the on / off control of low-pressure pipeline media. Its closing element (valve disc or butterfly plate) is generally a disc that rotates around the valve shaft to achieve the purpose of opening and closing. It has the advantages of simple structure, low fluid resistance, and convenient opening and closing.

[0003] The sealing performance of a butterfly valve mainly relies on the sealing ring at the outer end of the butterfly plate. However, in traditional butterfly valves, the force between the sealing ring and the inner wall of the valve body will decrease after repeated friction, which can easily lead to leakage. Moreover, in low-temperature environments or when the temperature of the flowing medium is low, the sealing ring will be at a low temperature. Low temperature will reduce the elasticity of the sealing ring, making it hard and brittle, and prone to cracking, resulting in a decrease in sealing performance and thus affecting its reliability.

[0004] To address these issues, we offer a highly reliable butterfly valve. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a highly reliable butterfly valve. The specific technical solution is as follows:

[0006] A highly reliable butterfly valve includes a valve body, a butterfly plate disposed within the valve body, an air groove formed within the butterfly plate, a sealing ring connected to the outer end of the butterfly plate, a valve shaft connected within the butterfly plate, an air inlet and an air outlet formed within the valve shaft, an air inlet pipe disposed at the upper end of the valve shaft, an air inlet fan disposed at the side end of the air inlet pipe, a heater disposed at the outer end of the air inlet pipe, a lower connecting pipe connected within the valve body, a pressure gauge connected to the side end of the lower connecting pipe, an electric push rod connected within the lower connecting pipe, an adjusting block connected to the drive end of the electric push rod, and a temperature sensor connected within the valve body.

[0007] Preferably, the valve body is provided with connecting flanges at both ends, the valve body is made of high-strength metal alloy material, such as a composite material of stainless steel and nickel alloy, the butterfly plate is made of high-strength wear-resistant metal material, such as stainless steel, and the butterfly plate is designed as a concave arc shape with its concave surface facing the water inlet end of the valve body.

[0008] Preferably, the outer end of the butterfly plate is connected to a reinforcing rib, which is radial in shape and extends outward from the center axis of the butterfly plate. The sealing ring is made of an elastic sealing material, such as high-quality rubber or polytetrafluoroethylene.

[0009] Preferably, the valve shaft is made of high-strength alloy steel, such as chromium-molybdenum steel. An upper connecting pipe is connected to the valve body. The valve shaft is rotatably connected to the upper connecting pipe and the lower connecting pipe. The air inlet and air outlet are respectively connected to the air groove.

[0010] Preferably, the air intake pipe is connected to the air intake hole, the lower end of the air intake pipe is connected to a connecting ring, the valve shaft is rotatably connected in the connecting ring, the side end of the air intake fan is provided with a dustproof mesh cover, and the heater is provided with a resistance heating wire.

[0011] Preferably, the lower end of the exhaust port extends into the lower connecting pipe, the air pressure gauge is connected to the exhaust port, the adjusting block is slidably connected in the lower connecting pipe, a bearing is connected in the upper connecting pipe, and the valve shaft is connected in the bearing.

[0012] Preferably, the upper end of the upper connecting pipe is connected to a protective box, the side end of the protective box is provided with an intelligent controller, the upper end of the protective box is connected to a support ring, and the heater is connected inside the support ring.

[0013] Preferably, a worm gear is connected to the outer end of the valve shaft, the worm gear is located inside the protective box, a worm is rotatably connected inside the protective box, the worm meshes with the worm gear, and a handwheel is connected to the side end of the worm, the handwheel is located at the outer end of the protective box.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This highly reliable butterfly valve is equipped with a heater. When the temperature of the flowing medium is low, activating the heater heats the gas in the inlet pipe, injecting hot gas into the gas groove. This heats the sealing ring, solving the problem of reduced elasticity, hardening, and cracking of the sealing ring due to low temperature, which leads to decreased sealing performance. Furthermore, the exhaust speed of the exhaust port can be adjusted via an electric push rod and adjusting block to ensure stable gas pressure in the gas groove. This allows the sealing ring to expand while being heated. Therefore, this device can effectively prevent media leakage even in low-temperature environments and with low-temperature media, demonstrating its high reliability.

[0016] 2. This highly reliable butterfly valve has an air groove inside the butterfly plate. When the air intake fan is started, air is injected into the air groove through the air intake pipe and air intake hole. The air pressure in the air groove increases, which causes the sealing ring to expand, thereby better fitting with the inner wall of the valve body. This results in a greater force between the sealing ring and the inner wall of the valve body, thus achieving a better sealing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2This is a front view structural diagram of the present utility model;

[0019] Figure 3 This is a schematic diagram of the butterfly plate structure of this utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 5 For the present utility model Figure 4 Schematic diagram of Area A;

[0022] Figure 6 For the present utility model Figure 4 Schematic diagram of area B.

[0023] Figure Descriptions: 1. Valve body; 2. Butterfly plate; 3. Air groove; 4. Sealing ring; 5. Valve shaft; 6. Air inlet; 7. Exhaust port; 8. Air inlet pipe; 9. Air inlet fan; 10. Heater; 11. Lower connecting pipe; 12. Air pressure gauge; 13. Electric push rod; 14. Adjusting block; 15. Temperature sensor; 16. Reinforcing rib; 17. Upper connecting pipe; 18. Bearing; 19. Protective box; 20. Intelligent controller; 21. Support ring; 22. Worm gear; 23. Worm; 24. Handwheel. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] Please see Figure 1 — Figure 6 The valve body 1 includes a valve body with connecting flanges at both ends and sealing rings inside the flanges. The valve body 1 is made of high-strength metal alloy material, such as a composite material of stainless steel and nickel alloy, which has good corrosion resistance and pressure resistance, and can maintain structural stability in various harsh working environments. A butterfly plate 2 is installed inside the valve body 1. The butterfly plate 2 is made of high-strength wear-resistant metal material, such as stainless steel, so that it can resist the scouring and corrosion of fluids. The butterfly plate 2 is designed as a concave arc shape, with its concave surface facing the water inlet end of the valve body 1. This design can effectively reduce stress concentration during sealing. A reinforcing rib 16 is connected to the outer end of the butterfly plate 2. The reinforcing rib 16 is radial in shape and extends outward from the central axis of the butterfly plate 2, which can ensure that the butterfly plate 2 will not deform when subjected to large pressure, thereby enhancing the reliability of the butterfly plate 2.

[0026] The butterfly plate 2 has an air groove 3 inside, and a sealing ring 4 is connected to the outer end of the butterfly plate 2. The sealing ring 4 is made of elastic sealing material, such as high-quality rubber or polytetrafluoroethylene. When the butterfly plate 2 is closed, it can form a good seal with the inner wall of the valve body 1. A valve shaft 5 is connected inside the butterfly plate 2. The valve shaft 5 is made of high-strength alloy steel, such as chromium-molybdenum steel, and its surface is chrome-plated to improve surface hardness and wear resistance. The valve shaft 5 has an air inlet 6 and an air outlet 7 inside, which are connected to the air groove 3 respectively. The upper end of the valve shaft 5 An air intake pipe 8 is provided, which is connected to an air intake hole 6. A connecting ring is connected to the lower end of the air intake pipe 8, and the valve shaft 5 is rotatably connected in the connecting ring. An air intake fan 9 is provided on the side of the air intake pipe 8, and a dustproof screen is provided on the side of the air intake fan 9. The dustproof screen is used to filter external dust. A heater 10 is provided on the outer end of the air intake pipe 8. A resistance heating wire is provided inside the heater 10. When the heater 10 is energized, it can generate heat, which is transferred to the air intake pipe 8 to heat the airflow in the air intake pipe 8.

[0027] A lower connecting pipe 11 is connected inside the valve body 1, and an upper connecting pipe 17 is also connected inside the valve body 1. The valve shaft 5 is rotatably connected inside the upper connecting pipe 17 and the lower connecting pipe 11. A pressure gauge 12 is connected to the side end of the lower connecting pipe 11. The pressure gauge 12 is connected to the exhaust port 7. The pressure gauge 12 is used to detect the pressure in the air tank 3. An electric push rod 13 is connected inside the lower connecting pipe 11. An adjusting block 14 is connected to the drive end of the electric push rod 13. The lower end of the exhaust port 7 extends into the lower connecting pipe 11. The adjusting block 14 is slidably connected inside the lower connecting pipe 11. The electric push rod 13 can drive the adjusting block 14 to move, thereby adjusting the size of the air hole in the exhaust port 7 and thus changing the exhaust speed of the exhaust port 7.

[0028] A bearing 18 is connected inside the upper connecting pipe 17, and the valve shaft 5 is connected inside the bearing 18. The bearing 18 has the characteristics of low friction coefficient, high temperature resistance and wear resistance, which can ensure the flexible rotation of the valve shaft 5 during long-term operation, reduce energy loss and improve service life. A protective box 19 is connected to the upper end of the upper connecting pipe 17. The protective box 19 is used to protect its internal equipment. An intelligent controller 20 is set on the side of the protective box 19. The intelligent controller 20 is used to control the inflation and heating of the device. A support ring 21 is connected to the upper end of the protective box 19. The heater 10 is connected inside the support ring 21. The support ring 21 is used to support and fix the heater 10. A temperature sensor 15 is connected inside the valve body 1.

[0029] A worm gear 22 is connected to the outer end of the valve shaft 5. The worm gear 22 is located inside the protective box 19. A worm 23 is rotatably connected inside the protective box 19. The worm 23 meshes with the worm gear 22. A handwheel 24 is connected to the side end of the worm 23. The handwheel 24 is located outside the protective box 19. Rotating the handwheel 24 will drive the worm 23 to rotate. The rotation of the worm 23 interacts with the worm gear 22, which will drive the valve shaft 5 to rotate, thereby driving the butterfly plate 2 to rotate. The worm gear 22 and worm 23 have a self-locking function. When the butterfly plate 2 is adjusted to the required position, it can automatically lock to prevent the valve from changing due to vibration or other reasons.

[0030] The electric actuator 13 in this application is a common electrical device in the prior art. This application will not elaborate on its model or internal structure. It can also be replaced by other power sources.

[0031] In use, after the butterfly plate 2 is closed, the intelligent controller 20 starts the intake fan 9, which injects gas into the air groove 3 through the intake pipe 8 and the intake hole 6, thereby causing the sealing ring 4 to expand outward and fit tightly against the inner wall of the valve body 1, thus improving the sealing effect. When the temperature sensor 15 detects that the ambient temperature is low or the temperature of the medium flowing through the valve body 1 is low, the intelligent controller 20 will power on the heater 10, thereby heating the air in the intake pipe 8, thus injecting hot air into the air groove 3, which in turn heats the sealing ring 4. The intelligent controller 20 moves the adjusting block 14 through the electric push rod 13 to adjust the exhaust speed of the exhaust hole 7. The air pressure in the air groove 3 is detected by the air pressure detector 12. When the air pressure in the air groove 3 reaches the set air pressure, the exhaust speed of the exhaust hole 7 is maintained. This allows the air pressure in the air groove 3 to be in dynamic equilibrium, so that the device can continuously fill the air groove 3 with hot air and keep the sealing ring 4 in an expanded state.

[0032] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A butterfly valve with high reliability, comprising a valve body (1), characterized in that: The valve body (1) is provided with a butterfly plate (2), the butterfly plate (2) is provided with a gas groove (3), the outer end of the butterfly plate (2) is connected with a sealing ring (4), the butterfly plate (2) is connected with a valve shaft (5), the valve shaft (5) is provided with an air inlet hole (6) and an air outlet hole (7), the upper end of the valve shaft (5) is provided with an air inlet pipe (8), the side end of the air inlet pipe (8) is provided with an air inlet fan (9), the outer end of the air inlet pipe (8) is provided with a heater (10), the valve body (1) is connected with a lower connecting pipe (11), the side end of the lower connecting pipe (11) is connected with a gas pressure detection table (12), the lower connecting pipe (11) is connected with an electric push rod (13), the driving end of the electric push rod (13) is connected with an adjusting block (14), and the valve body (1) is connected with a temperature sensor (15).

2. The strong reliability butterfly valve according to claim 1, characterized in that: The valve body (1) is provided with a connecting flange at both ends, the valve body (1) is made of high-strength metal alloy material, such as stainless steel and nickel alloy composite material, the butterfly plate (2) is made of high-strength wear-resistant metal material, such as stainless steel, and the butterfly plate (2) is designed as a concave arc, and the concave surface of the butterfly plate (2) faces the water inlet end of the valve body (1).

3. The strong reliability butterfly valve according to claim 1, characterized in that: The outer end of the butterfly plate (2) is connected with a reinforcing rib (16), the reinforcing rib (16) is radially shaped and extends outward from the central axis of the butterfly plate (2), and the sealing ring (4) is made of elastic sealing material, such as high-quality rubber or polytetrafluoroethylene.

4. The strong reliability butterfly valve according to claim 1, characterized in that: The valve shaft (5) is made of high-strength alloy steel, such as chromium-molybdenum steel, the valve body (1) is connected with an upper connecting pipe (17), the valve shaft (5) is rotatably connected in the upper connecting pipe (17) and the lower connecting pipe (11), and the air inlet hole (6) and the air outlet hole (7) are respectively communicated with the gas groove (3).

5. The strong reliability butterfly valve according to claim 1, characterized in that: The air inlet pipe (8) is communicated with the air inlet hole (6), the lower end of the air inlet pipe (8) is connected with a connecting ring, the valve shaft (5) is rotatably connected in the connecting ring, the side end of the air inlet fan (9) is provided with a dustproof mesh cover, and the heater (10) is internally provided with a resistance heating wire.

6. The strong reliability butterfly valve according to claim 4, characterized in that: The lower end of the air outlet hole (7) extends into the lower connecting pipe (11), the gas pressure detection table (12) is communicated with the air outlet hole (7), the adjusting block (14) is slidably connected in the lower connecting pipe (11), the upper connecting pipe (17) is connected with a bearing (18), and the valve shaft (5) is connected in the bearing (18).

7. The strong reliability butterfly valve according to claim 4, characterized in that: The upper end of the upper connecting pipe (17) is connected with a protection box (19), the side end of the protection box (19) is provided with an intelligent controller (20), the upper end of the protection box (19) is connected with a supporting ring (21), and the heater (10) is connected in the supporting ring (21).

8. The strong reliability butterfly valve according to claim 7, characterized in that: The outer end of the valve shaft (5) is connected with a worm wheel (22), the worm wheel (22) is located in the protection box (19), the protection box (19) is rotatably connected with a worm (23), the worm (23) is engaged with the worm wheel (22), the side end of the worm (23) is connected with a hand wheel (24), and the hand wheel (24) is located at the outer end of the protection box (19).

Images