Wear-resistant three-eccentric center butterfly valve

Abstract

The utility model relates to the field of butterfly valves, and discloses a wear-resistant three-eccentric center butterfly valve which comprises a valve body, a valve plate device is movably arranged in the valve body and comprises a valve plate, a plurality of first threaded holes and grooves are formed in the valve plate, a sealing gasket is movably arranged at one end of the valve plate, and a plurality of second threaded holes are formed in the other end of the valve plate. A fixing plate is movably arranged at one end of the sealing gasket, a plurality of countersunk threaded holes and grooves are formed in the fixing plate, countersunk screws are in threaded connection with the interiors of the countersunk threaded holes, and the countersunk screws are in threaded connection with the first threaded holes through the countersunk threaded holes; and the sealing gasket is located in a groove between the valve plate and the fixing plate, and wear-resistant coatings are bonded to the surfaces of the valve plate, the sealing gasket and the fixing plate. Through the wear-resistant coating arranged on the surface of the valve plate device, the wear resistance of the sealing surface of the valve plate device can be enhanced, so that the wear coefficient in the opening and closing process is reduced, and the service life of the butterfly valve can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, in particular to a wear-resistant triple-eccentric butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve features a disc-shaped closing element (disc or disc) that rotates around the valve axis to open and close. The valve can be used to control the flow of various fluids, including air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. It primarily serves as a shutoff and throttling mechanism in pipelines. The opening and closing element of a butterfly valve is a disc-shaped disc that rotates around its axis within the valve body, achieving opening, closing, or regulating functions.

[0003] The existing triple eccentric butterfly valve is susceptible to erosion by the medium fluid and wear caused by the opening and closing of the butterfly valve during long-term operation, resulting in reduced sealing performance and shortened service life, affecting the safe and stable operation of the pipeline system.

[0004] To this end, we propose a wear-resistant triple eccentric butterfly valve. Utility Model Content

[0005] The main purpose of the utility model is to provide a wear-resistant three-eccentric butterfly valve, which can effectively solve the problem that the butterfly valve is easily eroded and worn by the medium fluid during long-term operation, resulting in reduced sealing performance and shortened service life.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a wear-resistant three-eccentric butterfly valve, comprising a valve body, a valve plate device movably provided in the valve body, the valve plate device comprising a valve plate, a plurality of first threaded holes and grooves are provided on the valve plate, a sealing gasket is movably provided at one end of the valve plate, and a fixed plate is movably provided at one end of the sealing gasket, a plurality of countersunk threaded holes and grooves are provided on the fixed plate, a countersunk screw is threadedly connected to the countersunk threaded hole, the countersunk screw is threadedly connected through the countersunk threaded hole and the first threaded hole, and the sealing gasket is located between the valve plate and the first threaded hole. Two fixing blocks are fixedly installed at one end of the valve plate in the groove between the fixing plates, and a second through hole is provided on the fixing blocks. A wear-resistant coating is bonded to the surface of the valve plate, the sealing gasket and the fixing plate. A boss is provided in the valve body, and a plurality of third threaded holes are provided on the boss. A silicon nitride seal is movably provided at one end of the boss, and a plurality of second threaded holes are provided on the silicon nitride seal, and the third threaded hole and the second threaded hole are threadedly connected with an external hexagonal screw. The valve plate device is located on one side of the silicon nitride seal, and the surface of the valve plate device fits into the inner wall of the silicon nitride seal.

[0007] Preferably, the lower end of the valve body is connected to a limiting sleeve, and a sealing cover is provided at the lower end of the limiting sleeve, and the sealing cover is bolted to the limiting sleeve.

[0008] Preferably, a square tube is fixedly mounted on the valve body, and a sealing sleeve is provided in the square tube. A square box is fixedly mounted on the upper end of the square tube, and a ball bearing is fixedly mounted on the inner wall of the square box.

[0009] Preferably, an austenitic stainless steel valve shaft is inserted into the second through hole opened on the fixed block, and a fixing pin is inserted between the fixed block and the austenitic stainless steel valve shaft, the austenitic stainless steel valve shaft is sleeved in the limiting sleeve and the sealing sleeve, and a second bevel gear is fixedly installed on the upper end of the austenitic stainless steel valve shaft.

[0010] Preferably, a rotating shaft is movably inserted in the square box, one end of the rotating shaft is fixedly installed in a ball bearing, and a rotating wheel is fixedly installed on the other end of the rotating shaft. A first bevel gear is fixedly sleeved on the rotating shaft, and the first bevel gear is located between the ball bearing and the rotating wheel, and the first bevel gear and the second bevel gear are engaged with each other.

[0011] Preferably, connecting plates are fixedly installed at both ends of the valve body, and a plurality of first through holes are formed on the valve body and the two connecting plates.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The utility model provides a valve plate device, and the countersunk screw provided in the valve plate device is threadedly connected through the countersunk threaded hole and the first threaded hole to connect the valve plate and the fixed plate, and the sealing gasket is fixed in the groove between the valve plate and the fixed plate. A wear-resistant coating is bonded on the surface of the valve plate, the sealing gasket and the fixed plate. The wear-resistant coating has high-strength wear resistance and is also corrosion-resistant and high-temperature resistant, which can enhance the wear resistance, corrosion resistance and high-temperature resistance of the valve plate device. The wear-resistant coating provided on the surface of the valve plate device can enhance the wear resistance of the sealing surface of the valve plate device, thereby reducing the wear coefficient during the opening and closing process, and effectively extending the service life of the butterfly valve.

[0014] 2. The utility model has a wide range of applicability through the silicon nitride seal and austenitic stainless steel valve shaft, and can operate stably under various harsh working conditions. The silicon nitride seal has the physical properties of silicon nitride including high hardness of 1500-1900H, high melting point of about 1900℃, low thermal expansion coefficient, excellent thermal conductivity, good electrical insulation and anti-oxidation and corrosion resistance. The austenitic stainless steel valve shaft has good corrosion resistance and mechanical properties, as well as certain corrosion resistance. The surface of the valve plate device fits the inner wall of the silicon nitride seal, which can make the sealing performance stable and reliable, and can effectively prevent medium leakage.

[0015] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a wear-resistant triple-eccentric butterfly valve of the utility model from a first perspective.

[0017] Figure 2 This is a second perspective overall structural diagram of a wear-resistant triple-eccentric butterfly valve of the utility model.

[0018] Figure 3 This is an exploded view of a wear-resistant triple-eccentric butterfly valve of the utility model.

[0019] Figure 4 The figure is a side view of the valve body of a wear-resistant triple-eccentric butterfly valve of the utility model.

[0020] Figure 5 This is a front sectional view of the valve body of a wear-resistant triple-eccentric butterfly valve of the utility model.

[0021] Figure 6 This is a cross-sectional view of a square tube and a square box of a wear-resistant triple-eccentric butterfly valve of the utility model.

[0022] Figure 7 This is a structural schematic diagram of a valve plate device of a wear-resistant triple-eccentric butterfly valve of the utility model.

[0023] Figure 8 This is an exploded view of the valve plate device of a wear-resistant triple-eccentric butterfly valve of the utility model.

[0024] In the figure: 1. valve body; 2. connecting plate; 3. first through hole; 4. square tube; 5. square box; 6. runner; 7. valve plate; 8. sealing gasket; 9. fixing plate; 10. fixing block; 11. first threaded hole; 12. countersunk threaded hole; 13. countersunk screw; 14. second through hole; 15. silicon nitride seal; 16. second threaded hole; 17. external hexagon screw; 18. limiting sleeve; 19. sealing cover; 20. bolt; 21. rotating shaft; 22. ball bearing; 23. first bevel gear; 24. second bevel gear; 25. austenitic stainless steel valve shaft; 26. sealing sleeve; 27. third threaded hole; 28. boss; 29. wear-resistant coating; 30. valve plate assembly; 31. fixing pin. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figure 1 - Figure 8As shown, a wear-resistant three-eccentric butterfly valve includes a valve body 1, a valve plate device 30 is movably provided in the valve body 1, the valve plate device 30 includes a valve plate 7, a plurality of first threaded holes 11 and grooves are provided on the valve plate 7, a sealing gasket 8 is movably provided on one end of the valve plate 7, and a fixing plate 9 is movably provided on one end of the sealing gasket 8, a plurality of countersunk threaded holes 12 and grooves are provided on the fixing plate 9, a countersunk screw 13 is threadedly connected to the countersunk threaded hole 12, the countersunk screw 13 is threadedly connected through the countersunk threaded hole 12 and the first threaded hole 11, and the sealing gasket 8 is located on the valve plate 7. In the groove between the valve plate 7 and the fixed plate 9, two fixing blocks 10 are fixedly installed at one end of the valve plate 7, and a second through hole 14 is provided on the fixing block 10. A wear-resistant coating 29 is bonded to the surface of the valve plate 7, the sealing gasket 8 and the fixed plate 9. A boss 28 is provided in the valve body 1, and a plurality of third threaded holes 27 are provided on the boss 28. A silicon nitride seal 15 is movably provided at one end of the boss 28, and a plurality of second threaded holes 16 are provided on the silicon nitride seal 15, and the third threaded hole 27 and the second threaded hole 16 are both threadedly connected with an external hexagonal screw 17, and the valve plate device 3 0 is located on one side of the silicon nitride seal 15, and the surface of the valve plate device 30 is in contact with the inner wall of the silicon nitride seal 15; by adopting the above technical solution: the countersunk screw 13 provided in the valve plate device 30 is threadedly connected through the countersunk threaded hole 12 and the first threaded hole 11, so that the valve plate 7 and the fixed plate 9 are connected, and the sealing gasket 8 is fixed in the groove between the valve plate 7 and the fixed plate 9, and the wear-resistant coating 29 is bonded to the surface of the valve plate 7, the sealing gasket 8 and the fixed plate 9, and the provided external hexagonal screw 17 is threadedly connected through the second threaded hole 16 and the third threaded hole 27, so that The silicon nitride seal 15 is fixed at one end of the boss 28, and the surface of the valve plate device 30 is in contact with the inner wall of the silicon nitride seal 15, which can achieve sealing inside the valve body 1. The silicon nitride seal 15 has the physical properties of silicon nitride including high hardness of 1500~1900H, high melting point of about 1900℃, low thermal expansion coefficient, excellent thermal conductivity, good electrical insulation and anti-oxidation and corrosion resistance. The wear-resistant coating 29 has high-strength wear resistance and corrosion resistance and high temperature resistance, which can enhance the wear resistance, corrosion resistance and high temperature resistance of the valve plate device 30.

[0027] like Figure 1 - Figure 6 As shown, the lower end of the valve body 1 is connected to the limiting sleeve 18. The lower end of the limiting sleeve 18 is provided with a sealing cover 19, and the sealing cover 19 and the limiting sleeve 18 are connected by bolts 20. By adopting the above technical solution: the provided bolts 20 can connect and fix the sealing cover 19 and the limiting sleeve 18.

[0028] like Figure 1 - Figure 8As shown, a square tube 4 is fixedly mounted on the valve body 1, and a sealing sleeve 26 is provided inside the square tube 4, a square box 5 is fixedly mounted on the upper end of the square tube 4, and a ball bearing 22 is fixedly mounted on the inner wall of the square box 5. By adopting the above technical solution: the square tube 4 installed on the valve body 1 and the sealing sleeve 26 provided inside can play a sealing role, and the square box 5 and the ball bearing 22 installed on the inner wall can be used to protect and limit the components in the square box 5.

[0029] like Figure 1 - Figure 8 As shown, an austenitic stainless steel valve shaft 25 is inserted into the second through hole 14 opened on the fixed block 10, and a fixing pin 31 is inserted between the fixed block 10 and the austenitic stainless steel valve shaft 25, the austenitic stainless steel valve shaft 25 is sleeved in the limiting sleeve 18 and the sealing sleeve 26, and the upper end of the austenitic stainless steel valve shaft 25 is fixedly installed with a second bevel gear 24. By adopting the above technical solution: the set fixing pin 31 can fix the austenitic stainless steel valve shaft 25 inserted into the second through hole 14 on the fixed block 10 to avoid separation of the components, the set limiting sleeve 18 and the sealing sleeve 26 can limit and seal the austenitic stainless steel valve shaft 25, and the second bevel gear 24 installed on the austenitic stainless steel valve shaft 25 can be used for meshing transmission. The set austenitic stainless steel valve shaft 25 has good corrosion resistance and mechanical properties, and also has certain corrosion resistance.

[0030] like Figure 1 - Figure 6 As shown, a rotating shaft 21 is movably inserted in the square box 5, one end of the rotating shaft 21 is fixedly mounted in a ball bearing 22, and a rotating wheel 6 is fixedly mounted on the other end of the rotating shaft 21. A first bevel gear 23 is fixedly sleeved on the rotating shaft 21, and the first bevel gear 23 is located between the ball bearing 22 and the rotating wheel 6. The first bevel gear 23 and the second bevel gear 24 are meshed with each other. By adopting the above technical solution: rotating the rotating wheel 6 can rotate the rotating shaft 21 sleeved in the ball bearing 22, and the first bevel gear 23 and the second bevel gear 24 can be meshed and transmitted.

[0031] like Figure 1 - Figure 6 As shown, connecting plates 2 are fixedly installed at both ends of the valve body 1, and a plurality of first through holes 3 are opened on the valve body 1 and the two connecting plates 2. By adopting the above technical solution: the connecting plates 2 installed at both ends of the valve body 1 and the plurality of first through holes 3 opened can facilitate the connection of pipelines.

[0032] It should be noted that the present invention is a wear-resistant triple-eccentric butterfly valve. When in use, the device is fixedly installed in a designated position. First, the staff rotates the wheel 6 to rotate the shaft 21 sleeved in the ball bearing 22 installed on the inner wall of the square box 5. At the same time, the first bevel gear 23 sleeved on the shaft 21 rotates. The first bevel gear 23 engages the second bevel gear 24 to transmit the sealing sleeve 26 provided in the square tube 4 and the limiting sleeve 18 and the austenitic stainless steel valve shaft 25 sleeved in the second through hole 14 on the fixed block 10. The sealing sleeve 26 can achieve a sealing effect to prevent the medium from flowing back. The bolt 20 between the limiting sleeve 18 and the sealing cover 19 can be connected to The austenitic stainless steel valve shaft 25 is limited to prevent deviation during the rotation process. A fixing pin 31 is inserted between the austenitic stainless steel valve shaft 25 sleeved in the second through hole 14 on the fixed block 10. The austenitic stainless steel valve shaft 25 drives the valve plate device 30 in the valve body 1 to rotate. The countersunk screw 13 provided on the valve plate device 30 is threadedly connected through the countersunk threaded hole 12 and the first threaded hole 11 to connect the valve plate 7 and the fixed plate 9, and the sealing gasket 8 is fixed in the groove between the valve plate 7 and the fixed plate 9. A wear-resistant coating 29 is bonded to the surface of the valve plate 7, the sealing gasket 8 and the fixed plate 9, so that the surface of the valve plate device 30 no longer fits the inner wall of the silicon nitride seal 15 to achieve opening and closing;

[0033] The silicon nitride seal 15 is threadedly connected through the second threaded hole 16 and the third threaded hole 27 by an external hexagonal screw 17 to be fixed to one end of the boss 28 provided in the valve body 1. The wear-resistant coating 29 provided on the surface of the valve plate device 30 during the opening and closing process can enhance the wear resistance of the sealing surface of the valve plate device 30, thereby reducing the wear coefficient during the opening and closing process, thereby effectively extending the service life of the butterfly valve;

[0034] When the valve plate device 30 is opened and closed, the medium in the valve body 1 can flow. The connecting plates 2 installed at both ends of the valve body 1 and the plurality of first through holes 3 opened therein can facilitate the connection of pipelines.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant triple-eccentric butterfly valve, comprising a valve body (1), characterized in that: A valve plate device (30) is movably provided in the valve body (1), and the valve plate device (30) includes a valve plate (7), and a plurality of first threaded holes (11) and grooves are provided on the valve plate (7), and a sealing gasket (8) is movably provided at one end of the valve plate (7), and a fixed plate (9) is movably provided at one end of the sealing gasket (8), and a plurality of countersunk threaded holes (12) and grooves are provided on the fixed plate (9), and a plurality of countersunk screws (13) are threadedly connected in the plurality of countersunk threaded holes (12), and a plurality of countersunk screws (13) are threadedly connected through the countersunk threaded holes (12) and the first threaded holes (11), and the sealing gasket (8) is located in the groove between the valve plate (7) and the fixed plate (9), and two fixed blocks (10) are fixedly installed at one end of the valve plate (7), and the fixed block ( 10) are provided with a second through hole (14), the surfaces of the valve plate (7), the sealing gasket (8) and the fixed plate (9) are all bonded with a wear-resistant coating (29), a boss (28) is provided in the valve body (1), and a plurality of third threaded holes (27) are provided on the boss (28), a silicon nitride seal (15) is movably provided at one end of the boss (28), and a plurality of second threaded holes (16) are provided on the silicon nitride seal (15), and the second threaded hole (16) is internally threadedly connected with an external hexagonal screw (17), the external hexagonal screw (17) is threadedly connected through the second threaded hole (16) and the third threaded hole (27), the valve plate device (30) is located on one side of the silicon nitride seal (15), and the surface of the valve plate device (30) is in contact with the inner wall of the silicon nitride seal (15).

2. A wear-resistant triple-eccentric butterfly valve according to claim 1, characterized in that: The lower end of the valve body (1) is connected to a limiting sleeve (18), and a sealing cover (19) is provided at the lower end of the limiting sleeve (18). The sealing cover (19) and the limiting sleeve (18) are connected by bolts (20).

3. A wear-resistant triple-eccentric butterfly valve according to claim 2, characterized in that: A square tube (4) is fixedly mounted on the valve body (1), and a sealing sleeve (26) is provided inside the square tube (4). A square box (5) is fixedly mounted on the upper end of the square tube (4), and a ball bearing (22) is fixedly mounted on the inner wall of the square box (5).

4. The wear-resistant triple-eccentric butterfly valve according to claim 2, characterized in that: An austenitic stainless steel valve shaft (25) is inserted into the second through hole (14) opened on the fixed block (10), and a fixing pin (31) is inserted between the fixed block (10) and the austenitic stainless steel valve shaft (25). The austenitic stainless steel valve shaft (25) is sleeved in both the limiting sleeve (18) and the sealing sleeve (26), and a second bevel gear (24) is fixedly mounted on the upper end of the austenitic stainless steel valve shaft (25).

5. The wear-resistant triple-eccentric butterfly valve according to claim 3, characterized in that: A rotating shaft (21) is movably inserted into the square box (5), one end of the rotating shaft (21) is fixedly mounted in a ball bearing (22), and a rotating wheel (6) is fixedly mounted on the other end of the rotating shaft (21). A first bevel gear (23) is fixedly sleeved on the rotating shaft (21), and the first bevel gear (23) is located between the ball bearing (22) and the rotating wheel (6), and the first bevel gear (23) and the second bevel gear (24) are meshed with each other.

6. The wear-resistant triple-eccentric butterfly valve according to claim 1, characterized in that: Connecting plates (2) are fixedly mounted on both ends of the valve body (1), and a plurality of first through holes (3) are provided on the valve body (1) and the two connecting plates (2).

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