Bidirectional hard sealing butterfly valve

Abstract

The utility model discloses a bidirectional hard sealing butterfly valve, which relates to the technical field of butterfly valves and comprises a valve body and a connecting shell arranged outside the valve body. Further auxiliary sealing is carried out on the valve body sealing ring and the butterfly plate sealing ring through cooperation of the auxiliary sealing plate, the sealing inclined plate and the sealing attaching plate, the problem that the sealing effect is poor when the butterfly valve is used only through the sealing ring and the butterfly plate is solved, and the sealing performance of the butterfly valve can be improved; and meanwhile, the adjusting block drives the positioning ring and the plug pin to move, then the plug pin is inserted into the inserting groove of the locking ring, the problem that when the butterfly valve works, due to the fact that the adjusting rod and the valve rod are touched by other external factors, the angle of the butterfly plate deflects, and conveyed liquid is affected is solved, and the stability of the butterfly valve in the working process is advantageously improved.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically a bidirectional hard-seal butterfly valve. Background Technology

[0002] Hard-seal butterfly valves, also known as flap valves, are a type of simple regulating valve that can also be used for on / off control of liquids in low-pressure pipelines. Hard-seal butterfly valves mainly function as shut-off and throttling valves in pipelines.

[0003] Chinese patent application CN182119682111.6 discloses a bidirectional hard-seal butterfly valve, specifically relating to the field of butterfly valve technology. The valve includes a valve body, with flanges fixedly connected to both sides of the valve body and a connecting frame fixedly connected to the inner wall of the valve body. A protective shell is fixedly connected to the other end of the connecting frame, and an adjustment mechanism assembly is provided on the inner wall of the protective shell.

[0004] 1. When this patent is used on the construction site, the complex environment of the construction site makes it easy to touch the adjusting rod, which causes the angle of the butterfly plate to deflect and affects the liquid being transported, resulting in poor stability during operation.

[0005] 2. Currently, when a butterfly valve is closed by rotating the butterfly plate, the sealing ring comes into contact with the rotating butterfly plate to achieve the sealing effect. However, since the liquid flowing inside the pipeline has a certain impact, direct contact sealing can easily cause leakage of the flowing liquid, resulting in poor sealing performance of the butterfly valve. Utility Model Content

[0006] To address the above problems, this utility model provides a bidirectional hard-seal butterfly valve, which solves the aforementioned issues.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional hard-seal butterfly valve, comprising a valve body and a connecting shell disposed outside the valve body, wherein an adjusting box is connected to the top of the connecting shell, an adjusting rod is rotatably connected inside the adjusting box, a valve body sealing ring is fixedly connected inside the valve body, grooves are respectively provided on both sides of the valve body sealing ring, and auxiliary sealing parts are respectively provided on both sides of the valve body sealing ring.

[0008] Both of the auxiliary sealing parts include a plurality of springs, each spring being disposed inside a groove. One end of each spring is connected to a displacement block disposed inside the groove. An auxiliary sealing plate is fixedly connected to one side of the displacement block. A sealing inclined plate is connected to the side of the auxiliary sealing plate. A sealing bonding plate is connected to one side of the sealing inclined plate.

[0009] A locking ring is fixedly connected to the outside of the adjusting rod. A slot is provided on one side of the locking ring. An adjusting block is provided on the outside of the adjusting rod. A positioning ring is connected to one side of the adjusting block. A pin is fixedly connected to one side of the positioning ring.

[0010] Preferably, the adjustment box is internally rotatably connected to a single-threaded shaft, and the threaded portion of the single-threaded shaft is connected to the internal thread of the adjustment block.

[0011] Preferably, a limiting circular plate is fixedly connected to the other end of the single-threaded shaft, and a rotating disk is fixedly connected to one end of the single-threaded shaft.

[0012] Preferably, one end of the adjusting rod is connected to an adjusting handwheel, a first bevel gear is connected to the outside of the adjusting rod, and a second bevel gear is connected to the outside of the first bevel gear.

[0013] Preferably, the valve body has a valve stem inside, which is rotatably connected to the inside of the regulating box, and the outside of the valve stem is fixedly connected to the inside of the second bevel gear.

[0014] Preferably, the valve stem is externally connected to a butterfly plate located inside the valve body, and the butterfly plate is provided with a butterfly plate sealing ring on its exterior.

[0015] Preferably, the outer side of the butterfly plate sealing ring is provided with a sealing bevel, which is adapted to the sealing bevel.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This application uses an auxiliary sealing plate, a sealing inclined plate, and a sealing fitting plate to further assist in sealing the valve body sealing ring and the butterfly plate sealing ring. It also uses two auxiliary sealing parts to simultaneously apply a clamping force to both sides of the butterfly plate, thereby achieving auxiliary sealing. This solves the problem that the sealing effect of the butterfly valve is poor when relying solely on the sealing ring and the butterfly plate, and is beneficial to improving the sealing performance of the butterfly valve.

[0018] 2. This application uses an adjusting block to move the positioning ring and the pin, thereby inserting the pin into the slot of the locking ring to lock the adjusting rod and the valve stem. This solves the problem that when the butterfly valve is in operation, external factors may cause the adjusting rod and valve stem to touch, resulting in the deflection of the butterfly plate angle and affecting the transmitted liquid. This is beneficial to improving the stability of the butterfly valve during operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the regulating box of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of region A of this utility model;

[0022] Figure 4 This is a first cross-sectional view of the valve body of this utility model.

[0023] Figure 5 This is a second cross-sectional view of the valve body of this utility model.

[0024] Figure 6 This is a partial structural schematic diagram of the present invention.

[0025] The diagram shows the following components: 1. Valve body; 2. Connecting shell; 3. Adjusting box; 4. Valve body sealing ring; 5. Groove; 6. Spring; 7. Displacement block; 8. Auxiliary sealing plate; 9. Sealing inclined plate; 10. Sealing fitting plate; 11. Locking ring; 12. Slot; 13. Adjusting block; 14. Positioning ring; 15. Pin; 16. Single-threaded shaft; 17. Limiting circular plate; 18. Rotary disc; 19. Adjusting rod; 20. Adjusting handwheel; 21. First bevel gear; 22. Second bevel gear; 23. Valve stem; 24. Butterfly plate; 25. Butterfly plate sealing ring. Detailed Implementation

[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0027] Please see Figures 1 to 6 A bidirectional hard-seal butterfly valve includes a valve body 1 and a connecting shell 2 disposed outside the valve body 1. The butterfly valve of this application is an eccentric butterfly valve. The technology of eccentric butterfly valves is currently very mature and is known. Those skilled in the art can and should understand its specific functions and structure, so it will not be described in detail here. A flange is provided on the outside of the valve body 1. Multiple bolt holes are evenly distributed around the perimeter of the flange. During installation, bolts are passed through these holes and connected to the flange on the corresponding pipeline and tightened to achieve a stable connection between the valve body 1 and the pipeline. An adjusting box 3 is connected to the top of the connecting shell 2. An adjusting rod 19 is rotatably connected inside the adjusting box 3. A valve body sealing ring 4 is fixedly connected inside the valve body 1. The valve body sealing ring 4 is made of hard alloy, which has the advantages of high hardness, good wear resistance, high temperature resistance, and corrosion resistance. It can withstand the scouring and wear of high-speed fluid. Grooves 5 are opened on both sides of the valve body sealing ring 4, and auxiliary sealing parts are provided on both sides of the valve body sealing ring 4.

[0028] Both auxiliary sealing parts include several springs 6, which are located inside the groove 5. One end of each spring 6 is connected to a displacement block 7 located inside the groove 5. An auxiliary sealing plate 8 is fixedly connected to one side of the displacement block 7. A sealing inclined plate 9 is connected to the side of the auxiliary sealing plate 8. A sealing fitting plate 10 is connected to one side of the sealing inclined plate 9. The sealing inclined plate 9, the auxiliary sealing plate 8, and the sealing fitting plate 10 are integrally prefabricated, and their sealing surfaces are close to the butterfly plate 24 when the butterfly valve is closed. When the butterfly plate 24 is open, the displacement block 7 is inside the groove 5, and the auxiliary sealing plate 8 is also in contact with the side of the valve body sealing ring 4. Note that at this time, the sealing inclined plate 9 does not match the sealing inclined surface of the butterfly plate sealing ring 25. That is to say, when the butterfly plate 24 is closed, the butterfly plate sealing ring 25 is closed. The sealing ring 25 and the valve body sealing ring 4 are fitted together to form a sealing surface. The two sealing rings are tightly fitted together to achieve a seal. It should be noted that at this time, the butterfly plate sealing ring 25 will push the auxiliary sealing plate 8 and the sealing inclined plate 9 to move, so that the sealing inclined plate 9 can be adapted to and tightly fitted with the sealing inclined surface on the butterfly plate sealing ring 25. When the auxiliary sealing plate 8 and the sealing inclined plate 9 are displaced, the spring 6 will be stretched and at the same time, the spring 6 will also generate a contraction force to resist the stretching. This makes the auxiliary sealing part fit tightly with the butterfly plate sealing ring 25 for further sealing and to assist the valve body sealing ring 4 in sealing. Of course, the liquid pressure on the liquid inlet side will also compress the auxiliary sealing part on that side to fit tightly with the butterfly plate sealing ring 25, which is beneficial to improving the sealing performance of the butterfly valve.

[0029] It should also be noted that the valve body sealing ring 4 is provided with a closed sealing plate on each side of the auxiliary sealing part, so that no liquid will enter between the auxiliary sealing plate 8 and the valve body sealing ring 4 after the displacement block 7 is displaced, thereby ensuring the auxiliary function of the auxiliary sealing part.

[0030] Meanwhile, in order not to affect the normal rotation of the butterfly plate 24, two auxiliary sealing parts are respectively set on both sides of the butterfly plate 24 and both auxiliary sealing parts are arc-shaped. The two auxiliary sealing parts are used to simultaneously apply a clamping force to both sides of the butterfly plate 24 to perform auxiliary sealing.

[0031] A locking ring 11 is fixedly connected to the outside of the adjusting rod 19. A slot 12 is provided on one side of the locking ring 11. An adjusting block 13 is provided on the outside of the adjusting rod 19. A positioning ring 14 is connected to one side of the adjusting block 13. A pin 15 is fixedly connected to one side of the positioning ring 14. When the butterfly valve is working, in order to prevent other external factors from touching the adjusting rod 19 and the valve stem 23 and causing the angle of the butterfly plate 24 to deflect, thus affecting the transmitted liquid, when the butterfly valve is working, whether it is open or closed, the operator must rotate the rotating disk 18 so that the rotating disk 18 drives the single valve. When the threaded shaft 16 rotates, the adjusting block 13 moves along the single-threaded shaft 16 to adjust the outside of the adjusting rod 19. This causes the adjusting block 13 to move the positioning ring 14 and the pin 15, thereby inserting the pin 15 into the slot 12 of the locking ring 11 to lock the adjusting rod 19 and the valve stem 23. This helps to improve the stability of the butterfly valve. Of course, when adjusting the butterfly plate 24, the operator should first release the locking of the adjusting rod 19 and the valve stem 23, and then adjust the opening and closing of the butterfly plate 24. After the adjustment is completed, the butterfly plate 24 should be locked again.

[0032] The internal rotating connection of the regulating box 3 is a single-threaded shaft 16, and the threaded part of the single-threaded shaft 16 is connected to the internal thread of the regulating block 13.

[0033] The other end of the single-threaded shaft 16 is fixedly connected to a limiting circular plate 17. The limiting circular plate 17 is used to limit the movement distance of the adjusting block 13 to prevent the adjusting block 13 from moving excessively. One end of the single-threaded shaft 16 is fixedly connected to a rotating disk 18.

[0034] One end of the adjusting rod 19 is connected to an adjusting handwheel 20. The adjusting rod 19 is externally connected to a first bevel gear 21. The first bevel gear 21 is externally connected to a second bevel gear 22. When the operator adjusts the butterfly valve, the adjusting handwheel 20 is rotated, causing the adjusting handwheel 20 to drive the adjusting rod 19 to rotate. At this time, the adjusting rod 19 drives the first bevel gear 21 to rotate, and the first bevel gear 21 drives the second bevel gear 22 to rotate. In turn, the second bevel gear 22 drives the valve stem 23 to rotate. The rotation of the valve stem 23 drives the butterfly plate 24 to rotate, thereby controlling the opening and closing of the butterfly plate 24.

[0035] The valve body 1 is provided with a valve stem 23 inside, which is rotatably connected to the inside of the regulating box 3, and the outside of the valve stem 23 is fixedly connected to the inside of the second bevel gear 22.

[0036] The valve stem 23 is externally connected to a butterfly plate 24 located inside the valve body 1. The butterfly plate 24 is externally provided with a butterfly plate sealing ring 25. The butterfly plate sealing ring 25 is made of stainless steel and graphite asbestos. It combines the corrosion resistance of stainless steel with the good elasticity and high temperature resistance of graphite asbestos. Stainless steel provides structural strength and corrosion resistance, while graphite asbestos gives the sealing ring good flexibility and sealing performance, so that the butterfly plate sealing ring 25 can maintain a good sealing effect in high temperature environments.

[0037] The outer side of the butterfly plate sealing ring 25 is provided with a sealing bevel, which is adapted to the sealing bevel plate 9.

[0038] When using this utility model:

[0039] First, the valve body 1 is provided with a flange on the outside. Multiple bolt holes are evenly distributed around the perimeter of the flange. During installation, bolts are passed through these holes and connected to the flange on the corresponding pipeline and tightened, thereby achieving a stable connection between the valve body 1 and the pipeline.

[0040] Secondly, the operator rotates the rotary disk 18, causing the rotary disk 18 to drive the single-threaded shaft 16 to rotate. At this time, the adjusting block 13 will move and adjust along the single-threaded shaft 16 outside the adjusting rod 19, causing the adjusting block 13 to drive the positioning ring 14 and the pin 15 to move, thereby inserting the pin 15 into the slot 12 of the locking ring 11 to lock the adjusting rod 19 and the valve stem 23. Of course, when adjusting the butterfly plate 24, the operator first releases the locking of the adjusting rod 19 and the valve stem 23, then adjusts the opening and closing of the butterfly plate 24, and locks it again after the adjustment is completed.

[0041] Then, when adjusting the butterfly valve, the operator rotates the adjusting handwheel 20, which in turn drives the adjusting rod 19 to rotate. At this time, the adjusting rod 19 drives the first bevel gear 21 to rotate, and the first bevel gear 21 drives the second bevel gear 22 to rotate. In turn, the second bevel gear 22 drives the valve stem 23 to rotate, and the rotation of the valve stem 23 drives the butterfly plate 24 to rotate, thereby controlling the opening and closing of the butterfly plate 24.

[0042] Finally, when the butterfly plate 24 is open, the displacement block 7 is inside the groove 5, and the auxiliary sealing plate 8 also fits against the side of the valve body sealing ring 4. Note that at this time, the sealing inclined plate 9 does not match the sealing inclined surface of the butterfly plate sealing ring 25. That is to say, when the butterfly plate 24 is closed, the butterfly plate sealing ring 25 and the valve body sealing ring 4 fit together to form a sealing surface. The two sealing rings fit tightly together to seal. It should be noted that at this time, the butterfly plate sealing ring 25 will push the auxiliary sealing plate 8 and the sealing inclined plate 9 to move, so that the sealing inclined plate 9 matches and fits tightly with the sealing inclined surface on the butterfly plate sealing ring 25. When the auxiliary sealing plate 8 and the sealing inclined plate 9 move, the spring 6 will be stretched and the spring 6 will also generate a contraction force to resist the stretching. This makes the auxiliary sealing part fit tightly with the butterfly plate sealing ring 25 for further sealing to assist the valve body sealing ring 4 in sealing. Of course, the liquid pressure on the liquid entry side will also compress the auxiliary sealing part on that side to fit tightly with the butterfly plate sealing ring 25, which is beneficial to improving the sealing performance of the butterfly valve.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bidirectional hard-seal butterfly valve, comprising a valve body (1) and a connecting shell (2) disposed outside the valve body (1), wherein an adjusting box (3) is connected to the top of the connecting shell (2), and an adjusting rod (19) is rotatably connected inside the adjusting box (3), characterized in that: A valve body sealing ring (4) is fixedly connected inside the valve body (1). Grooves (5) are respectively opened on both sides of the valve body sealing ring (4). Auxiliary sealing parts are respectively provided on both sides of the valve body sealing ring (4). Both of the auxiliary sealing parts include a plurality of springs (6), the springs (6) are disposed inside the groove (5), one end of the springs (6) is connected to a displacement block (7) disposed inside the groove (5), one side of the displacement block (7) is fixedly connected to an auxiliary sealing plate (8), the side of the auxiliary sealing plate (8) is connected to a sealing inclined plate (9), and one side of the sealing inclined plate (9) is connected to a sealing bonding plate (10). A locking ring (11) is fixedly connected to the outside of the adjusting rod (19). A slot (12) is provided on one side of the locking ring (11). An adjusting block (13) is provided on the outside of the adjusting rod (19). A positioning ring (14) is connected to one side of the adjusting block (13). A pin (15) is fixedly connected to one side of the positioning ring (14).

2. The bidirectional hard-seal butterfly valve according to claim 1, characterized in that: The adjustment box (3) is internally rotatably connected to a single-threaded shaft (16), and the threaded part of the single-threaded shaft (16) is connected to the internal thread of the adjustment block (13).

3. A bidirectional hard-seal butterfly valve according to claim 2, characterized in that: The other end of the single-threaded shaft (16) is fixedly connected to a limiting circular plate (17), and one end of the single-threaded shaft (16) is fixedly connected to a rotating disk (18).

4. A bidirectional hard-seal butterfly valve according to claim 1, characterized in that: One end of the adjusting rod (19) is connected to an adjusting handwheel (20), and the outside of the adjusting rod (19) is connected to a first bevel gear (21), and the outside of the first bevel gear (21) is connected to a second bevel gear (22).

5. A bidirectional hard-seal butterfly valve according to claim 1, characterized in that: The valve body (1) is provided with a valve stem (23) inside. The valve stem (23) is rotatably connected to the inside of the regulating box (3). The outside of the valve stem (23) is fixedly connected to the inside of the second bevel gear (22).

6. A bidirectional hard-seal butterfly valve according to claim 5, characterized in that: The valve stem (23) is externally connected to a butterfly plate (24) located inside the valve body (1), and the butterfly plate (24) is provided with a butterfly plate sealing ring (25) on its exterior.

7. A bidirectional hard-seal butterfly valve according to claim 6, characterized in that: The outer side of the butterfly plate sealing ring (25) is provided with a sealing slope, which is adapted to the sealing slope plate (9).

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