Flange type butterfly valve

Abstract

The utility model discloses a flange type butterfly valve which is mainly composed of a valve body, a flange plate, a valve rod, a butterfly plate and an opening and closing mechanism, the opening and closing mechanism comprises a shaft seat, a shell, a worm, a driving bevel gear, a worm gear, a driven bevel gear, a spline shaft, a clutch wheel and the like, the spline shaft is fixedly sleeved on the valve rod, and the clutch wheel is arranged on the spline shaft in a sliding mode. The clutch wheel can be meshed with the worm gear or the driven bevel gear, so that the valve rod is matched with different gears, and the requirements for quick opening and closing and fine adjustment are met. In the using process, torsion is increased by rotating the hand wheel, driving the worm or driving the bevel gear, meshing transmission of the worm and the worm gear, the valve closing device is suitable for the situation that a valve needs to be closed with large force, meanwhile, the driving bevel gear and the driven bevel gear are in meshing transmission, another transmission mode is provided, and operation is convenient. Due to the design of the clutch wheel, the valve rod is allowed to be matched with different gears, the transmission modes are flexibly switched, and different operation requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a flange type butterfly valve. Background Art

[0002] Flange butterfly valve is a type of butterfly valve. Its structural feature is that a butterfly plate is installed on the axis of the valve stem. The valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the effect of opening, closing or regulating. Flange butterfly valve has simple structure, small size, light weight, low material consumption, small installation size, small driving torque, easy and fast operation, and at the same time has good flow regulation function and closing sealing characteristics. It is the leading valve form in the use field of large and medium calibers and medium and low pressures.

[0003] In the prior art, a flange-type butterfly valve with a publication number of "CN203176385U" includes a valve body and a valve disc, a shaft is provided on the valve body, and the upper and lower ends of the valve disc are respectively provided on the shaft, the valve body has an inlet and an outlet, and the valve disc is located on the flow channel between the inlet and the outlet, and is characterized in that an annular groove is provided on the valve disc, and a sealing ring is installed in the annular groove. Due to the above structure, the flange-type butterfly valve has an annular groove on the outer ring of the valve disc, and a sealing ring is installed in the annular groove, which solves the sealing performance of the valve body and the valve disc, and has low processing difficulty, simple production process, low production cost, and improved product service life.

[0004] However, the existing technology still has major deficiencies, such as:

[0005] Traditional butterfly valves often have only one transmission mode. However, in different situations, the force required by the operator to open the valve is different. For example, when the pipeline is unloaded, it is easier to open and close the valve. When there is pressure in the pipeline, it is very difficult to open and close the valve. However, in the existing technology, the way to open and close the valve is relatively single, and it is difficult to change the opening speed of the same valve according to different situations. Utility Model Content

[0006] The purpose of the utility model is to provide a flange type butterfly valve to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A flange type butterfly valve, comprising a valve body, flanges are fixedly arranged at both ends of the valve body, a valve stem is rotatably arranged in the valve body, a butterfly plate for pipeline sealing is fixedly arranged on the valve stem, an opening and closing mechanism is fixedly arranged on the valve body, the opening and closing mechanism comprises a shaft seat fixedly arranged on the valve body, a housing is fixedly arranged on the shaft seat, and a driving bevel gear and a worm are rotatably arranged on the housing;

[0009] A driven bevel gear and a worm gear are rotatably arranged on the valve stem, a spline shaft is fixedly sleeved on the valve stem, a clutch wheel is slidably arranged on the spline shaft, and meshing wheels matching the clutch wheel are fixedly arranged on the driven bevel gear and the worm wheel, and the valve stem can be matched with different gears through the meshing of the clutch wheel with different gears;

[0010] The worm wheel is meshed with the worm for transmission, and the driving bevel gear is meshed with the driven bevel gear for transmission.

[0011] Preferably, a plurality of clutch baffles are provided at both ends of the clutch wheel, and a plurality of the clutch baffles are provided with inclined surfaces.

[0012] Preferably, the meshing wheel is provided with a meshing groove, and a plurality of meshing baffles are arranged in the meshing groove.

[0013] Preferably, an annular groove is provided on the clutch wheel, a shift lever is rotatably provided on the outer shell, a shift block is provided on the shift lever, and the shift block is used in conjunction with the annular groove. When the shift lever drives the clutch wheel to engage with the worm gear, the operator can drive the valve stem to rotate by rotating the worm gear. When the shift lever drives the clutch gear to engage with the driven bevel gear, the operator can drive the valve stem to rotate by rotating the driving bevel gear.

[0014] Preferably, the lever is rotatably disposed on the housing via a support block.

[0015] Preferably, a hand wheel is fixedly provided on the shaft of the worm and the driving bevel gear.

[0016] Preferably, a reinforcing rib is fixedly provided between the shaft seat and the valve body.

[0017] Preferably, a sealing gasket is fixedly arranged in the valve body, and the sealing gasket is made of elastic material.

[0018] Preferably, the sealing gasket is rubber.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. Through the design of the clutch wheel, the butterfly valve can flexibly switch between different transmission modes, namely worm gear transmission and bevel gear transmission. This design allows operators to choose the appropriate operation mode according to actual needs, meeting different operation requirements.

[0021] 2. When the valve needs to be opened and closed quickly, the clutch wheel meshes with the driven bevel gear, and the valve stem and butterfly plate are driven by the bevel gear to rotate quickly, thus realizing the rapid opening and closing of the valve. When a large force is required to close the valve, the clutch wheel meshes with the worm wheel, and the principle of increasing torque by worm gear transmission is used to make the valve close more reliably.

[0022] During the use of the utility model, the clutch wheel in the opening and closing mechanism allows the valve stem to cooperate with different gears, such as a worm gear or a driven bevel gear. When closing the valve, the operator meshes the clutch wheel with the worm gear, and uses the worm gear transmission to increase the torque, so that the valve stem rotates to close the butterfly plate. When rapid opening and closing is required, the clutch wheel meshes with the driven bevel gear, and the butterfly plate is quickly opened or closed through the bevel gear transmission. This design provides a flexible transmission mode to meet different operation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the overall device of the utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the opening and closing mechanism of the utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the clutch wheel and the driven bevel gear of the utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the clutch wheel and the worm wheel of the utility model;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the clutch wheel and the spline shaft of the utility model.

[0028] In the figure: 1. valve body; 2. flange; 3. valve stem; 4. butterfly plate; 5. opening and closing mechanism; 6. shaft seat; 7. housing; 8. driving bevel gear; 9. worm; 10. driven bevel gear; 11. worm wheel; 12. spline shaft; 13. clutch wheel; 14. meshing wheel; 15. clutch baffle; 16. meshing groove; 17. meshing baffle; 18. annular groove; 19. lever; 20. lever block; 21. support block; 22. handwheel; 23. reinforcing rib; 24. sealing gasket. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In fluid control systems, butterfly valves play a vital role. In order to meet the growing industrial needs, we have designed a new type of flange butterfly valve, which is characterized by the design of its opening and closing mechanism, especially the application of the clutch wheel, which provides users with a more flexible and efficient operation method.

[0031] See also Figure 1-5 , the utility model provides a technical solution:

[0032] A flange type butterfly valve mainly includes a valve body 1, a flange 2, a valve stem 3, a butterfly plate 4 and a unique opening and closing mechanism 5. Flanges 2 are fixedly arranged at both ends of the valve body 1 for easy connection with a fluid pipeline. A valve stem 3 is rotatably arranged in the valve body 1, and a butterfly plate 4 is fixedly arranged on the valve stem 3 for pipeline sealing.

[0033] The opening and closing mechanism 5 is the core of this butterfly valve, which includes a shaft seat 6, a housing 7, a worm 9, a driving bevel gear 8, a worm wheel 11, a driven bevel gear 10, a spline shaft 12, a clutch wheel 13 and other components. The shaft seat 6 is fixedly set on the valve body 1, and the housing 7 is fixedly set on the shaft seat 6. The worm 9 and the driving bevel gear 8 are both rotatably set on the housing 7. The worm wheel 11 and the driven bevel gear 10 are rotatably set on the valve stem 3. In particular, a spline shaft 12 is fixedly sleeved on the valve stem 3, and a clutch wheel 13 is slidably set on the spline shaft 12. The design of the clutch wheel 13 allows the valve stem 3 to cooperate with different gears to achieve rapid opening and closing and fine-tuning.

[0034] In this embodiment, the valve body 1 of the flange butterfly valve is connected to the fluid pipeline through the flange 2. The valve stem 3 passes through the valve body 1 and is fixed with a butterfly plate 4, which is used to seal the pipeline. The opening and closing mechanism 5 includes a shaft seat 6, a housing 7, a worm 9, a driving bevel gear 8, a worm wheel 11, a driven bevel gear 10, a spline shaft 12, a clutch wheel 13, a meshing wheel 14 and other components;

[0035] When the butterfly valve needs to be opened or closed, the hand wheel 22 is turned to drive the worm 9 or the bevel gear 8 to rotate, and the worm 9 is meshed with the worm wheel 11 to rotate the worm wheel 11, and then the valve stem 3 is driven to rotate through the spline shaft 12 to open or close the butterfly plate 4.

[0036] At the same time, the driven bevel gear 10 can also be driven by meshing the driving bevel gear 8 with the driven bevel gear 10 to realize the rotation of the driven bevel gear 10, and the driven bevel gear 10 rotates and then drives the valve stem 3 to rotate through the spline shaft 12 to realize the opening and closing of the butterfly plate 4;

[0037] The design of the clutch wheel 13 allows the valve stem 3 to cooperate with different gears (it should be noted that the clutch wheel 13 can only mesh with one of the clutch wheels 13 at a time), so as to achieve rapid opening and closing and fine adjustment. Through the control of the lever 19 and the shift block 20, the clutch wheel 13 can be meshed with different meshing wheels 14, so as to select the worm wheel 11 and worm 9 transmission or the bevel gear transmission. This design provides a flexible transmission mode, so that the operator can choose the appropriate operation mode according to the needs;

[0038] When fluid passes through the pipeline, it takes a large force to close the valve. The worm wheel 11 and the worm 9 can increase the torque by transmission. The operator uses the lever 19 to mesh the clutch wheel 13 with the worm wheel 11. Before this, since the worm wheel 11 is rotatably arranged on the valve stem 3, the worm wheel 11 cannot drive the valve stem 3 to rotate. After the clutch wheel 13 is meshed with the worm wheel 11, the worm wheel 11 can drive the clutch baffle 15 to move through the meshing baffle 17, thereby driving the clutch wheel 13 to rotate. The clutch wheel 13 drives the valve stem 3 to rotate through the spline shaft 12, thereby closing the butterfly plate 4.

[0039] If the operator needs to open or quickly open and close the valve, the operator can use the lever 19 to mesh the clutch wheel 13 with the driven bevel gear 10. Before this, since the driven bevel gear 10 is rotatably arranged on the valve stem 3, the driven bevel gear 10 cannot drive the valve stem 3 to rotate. After the clutch wheel 13 is meshed with the driven bevel gear 10, the driven bevel gear 10 can drive the clutch baffle 15 to move through the meshing baffle 17, thereby driving the clutch wheel 13 to rotate. The clutch wheel 13 drives the valve stem 3 to rotate through the spline shaft 12, thereby realizing the opening or rapid opening and closing of the butterfly plate 4.

[0040] The clutch wheel 13 is the core component of the flange butterfly valve, and its structural design enables the butterfly valve to flexibly switch different transmission modes. A plurality of clutch baffles 15 are arranged at both ends of the clutch wheel 13, and each clutch baffle 15 has a bevel design, which helps to achieve smooth engagement and disengagement between the clutch wheel 13 and the meshing wheel 14. Correspondingly, a meshing groove 16 is provided on the meshing wheel 14, and a plurality of meshing baffles 17 are arranged in the groove, which closely cooperate with the clutch baffle 15 to ensure the stability and reliability of the transmission.

[0041] In order to facilitate the operation of the meshing state of the clutch wheel 13, an annular groove 18 is specially provided on the clutch wheel 13. A rotatable lever 19 is configured on the housing 7, and a shift block 20 is installed on the lever 19. The shift block 20 cooperates with the annular groove 18, so that the operator can easily switch the meshing state of the clutch wheel 13 and the worm wheel 11 or the driven bevel gear 10 through the action of the lever 19. When the lever 19 drives the clutch wheel 13 to mesh with the worm wheel 11, the operator can rotate the worm 9 to drive the valve stem 3 to close the butterfly plate 4; and when the lever 19 drives the clutch wheel 13 to mesh with the driven bevel gear 10, the operator can drive the valve stem 3 by rotating the driving bevel gear 8 to open or quickly open and close the butterfly plate 4.

[0042] In order to ensure the stable rotation of the lever 19, the lever 19 is arranged on the housing 7 through the support block 21. At the same time, a hand wheel 22 is fixedly arranged on the shaft of the worm 9 and the driving bevel gear 8, which is convenient for the operator to rotate. In order to enhance the structural strength of the valve body 1, a reinforcing rib 23 is fixedly arranged between the shaft seat 6 and the valve body 1. A sealing gasket 24 is fixedly arranged in the valve body 1. This sealing gasket 24 is made of elastic material, such as rubber, which can effectively improve the sealing performance of the butterfly valve and prevent fluid leakage.

[0043] Working principle: During the use of the utility model, the clutch wheel 13 is meshed with different gears to achieve the matching of the valve stem 3 and the worm wheel 11 or the bevel gear, thereby controlling the opening and closing of the butterfly plate 4. When the valve needs to be closed, the clutch wheel 13 is meshed with the worm wheel 11, and the worm wheel 11 is driven by the worm 9 to rotate and drive the worm wheel 11, and then the valve stem 3 and the butterfly plate 4 are rotated and closed through the spline shaft 12. When the valve needs to be opened and closed quickly, the clutch wheel 13 is meshed with the driven bevel gear 10, and the driven bevel gear 8 is driven to rotate and drive the driven bevel gear 10, and the valve stem 3 and the butterfly plate 4 are also quickly rotated through the spline shaft 12 to achieve opening and closing. The design of the clutch wheel 13 enables the butterfly valve to flexibly switch between different transmission modes to meet different operating requirements. The sealing gasket 24 in the valve body 1 ensures the sealing of the fluid and prevents leakage. The entire working principle reflects the flexibility and efficiency of the butterfly valve, ensuring its stable operation in various environments.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flange type butterfly valve, comprising a valve body (1), flanges (2) are fixedly arranged at both ends of the valve body (1), a valve stem (3) is rotatably arranged in the valve body (1), a butterfly plate (4) for pipeline sealing is fixedly arranged on the valve stem (3), and the characteristics are: An opening and closing mechanism (5) is fixedly arranged on the valve body (1), and the opening and closing mechanism (5) comprises a shaft seat (6) fixedly arranged on the valve body (1), a housing (7) is fixedly arranged on the shaft seat (6), and a driving bevel gear (8) and a worm (9) are rotatably arranged on the housing (7); A driven bevel gear (10) and a worm gear (11) are rotatably arranged on the valve stem (3); a spline shaft (12) is fixedly sleeved on the valve stem (3); a clutch wheel (13) is slidably arranged on the spline shaft (12); and meshing wheels (14) matching the clutch wheel (13) are fixedly arranged on the driven bevel gear (10) and the worm gear (11); and the valve stem (3) can be matched with different gears by meshing the clutch wheel (13) with different gears; The worm wheel (11) is meshed with the worm (9) for transmission, and the driving bevel gear (8) is meshed with the driven bevel gear (10) for transmission.

2. A flange type butterfly valve according to claim 1, characterized in that: A plurality of clutch baffles (15) are provided at both ends of the clutch wheel (13), and a plurality of the clutch baffles (15) are provided with inclined surfaces.

3. A flange type butterfly valve according to claim 2, characterized in that: The meshing wheel (14) is provided with a meshing groove (16), and a plurality of meshing baffles (17) are arranged in the meshing groove (16).

4. A flange type butterfly valve according to claim 3, characterized in that: The clutch wheel (13) is provided with an annular groove (18), the housing (7) is rotatably provided with a lever (19), the lever (19) is provided with a lever block (20), the lever block (20) is used in conjunction with the annular groove (18), when the lever (19) drives the clutch wheel (13) to engage with the worm wheel (11), the operator can drive the valve stem (3) to rotate by rotating the worm (9), and when the lever (19) drives the clutch gear to engage with the driven bevel gear (10), the operator can drive the valve stem (3) to rotate by rotating the driving bevel gear (8).

5. A flange type butterfly valve according to claim 4, characterized in that: The shifting rod (19) is rotatably arranged on the housing (7) via a supporting block (21).

6. A flange type butterfly valve according to claim 3, characterized in that: A hand wheel (22) is fixedly arranged on the shaft of the worm (9) and the driving bevel gear (8).

7. A flange type butterfly valve according to claim 2, characterized in that: A reinforcing rib (23) is fixedly arranged between the shaft seat (6) and the valve body (1).

8. The flange type butterfly valve according to claim 1, characterized in that: A sealing gasket (24) is fixedly arranged in the valve body (1), and the sealing gasket (24) is made of elastic material.

9. A flange type butterfly valve according to claim 8, characterized in that: The sealing gasket (24) is made of rubber.

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