Dual-drive end face sealing butterfly valve capable of dividing flow

Abstract

The invention provides a shunt dual-drive end face sealing butterfly valve which comprises a valve body, a partition plate is arranged in the valve body in the axial direction of the valve body, an inner cavity of the valve body is divided into two shunt channels by the partition plate, a valve plate is further arranged in each shunt channel, two actuators are further arranged outside the valve body, and the valve plate is connected with the two actuators. The split-flow valve has the advantages that the split-flow dual-drive design is adopted, the valve plates are opened along the flow direction, the split-flow valve is provided with two split-flow channels, the two channels can be opened or closed at the same time according to the specific requirement for flow adjustment, and the split-flow valve is simple in structure, convenient to use and high in practicability. And different opening degrees of the valve plates in the two channels can be controlled respectively, the flow dividing control function is achieved in fluid pipeline control, the precise flow adjusting function is achieved in the adjusting working condition, and meanwhile the torque is small, and the cost is low.

Description

Technical Field

[0001] The invention relates to the field of butterfly valve equipment, in particular to a divertable double-driven end-face sealing butterfly valve. Background Art

[0002] End-sealed butterfly valves are widely used in petrochemical, metallurgy, electric power, water supply and drainage, municipal construction, food, pharmaceutical and other industries due to their simple structure, small size, light weight, low cost, easy operation and good fluid control characteristics. They are widely used as pipeline control devices for regulating flow or cutting off gas or liquid media.

[0003] In certain regulating conditions, the valve is required to achieve precise flow regulation function and at the same time, the valve is required to achieve diversion effect. However, the current diversion valve is usually only set to divert two pipes, and the flow conditions inside it cannot be controlled, and the flow cannot be adjusted. Summary of the invention

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a divertable dual-drive end-face sealing butterfly valve to solve the technical problem that the prior art is usually only set up with two pipes for drainage, the internal flow conditions cannot be controlled, and the flow cannot be adjusted.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a divertable double-driven end-face sealing butterfly valve, comprising:

[0006] A valve body, wherein a partition is provided inside the valve body along its axial direction, and the partition divides the inner cavity of the valve body into two diversion channels;

[0007] A valve plate is also provided in each flow-dividing channel, and two actuators are also provided outside the valve body, the actuators correspond to the valve plates one by one, and the actuators are used to adjust the corresponding rotation angle of the valve plates;

[0008] The actuator includes a cylinder, a rack, a gear shaft, a stopper and a sealing ring. The rack is directly connected to the piston in the cylinder. When compressed air enters the cylinder, it pushes the piston to move linearly, thereby driving the rack to move linearly. The rack meshes with the teeth on the gear shaft. When the rack moves linearly, the gear shaft will rotate accordingly through the meshing of the gears, and the corresponding valve plate will rotate driven by the gear shaft. A self-locking mechanism is also provided on the actuator.

[0009] The advantage of adopting the above technical solution is that it adopts a divertable dual-drive design, the valve plate opens downstream, and has two diverter channels. The two channels can be opened or closed at the same time according to the specific needs of flow regulation, and the different openings of the valve plates in the two channels can also be controlled separately, thereby realizing diverter control in fluid pipeline control, and realizing precise flow regulation function in regulating conditions while having low torque and low cost.

[0010] Optionally, the valve body includes two axially connected auxiliary valve bodies, the interior of the auxiliary valve body is provided with a connecting plate along its axial direction, the connecting plate divides the inner cavity of the auxiliary valve body into two areas, when the two auxiliary valve bodies are connected, the connecting plates are pressed against each other and are located in the same plane, and the two connecting plates are pressed against each other to form the partition.

[0011] Optionally, one of the actuators and the corresponding valve plate are located on one auxiliary valve body, and another of the actuators and the corresponding valve plate are located on another auxiliary valve body.

[0012] Optionally, the valve plate is arranged in the auxiliary valve body through a valve stem, both ends of the valve stem extend out of the corresponding auxiliary valve body, and the other extended end of the valve stem is connected to the corresponding actuator.

[0013] Optionally, two bearing assemblies are further provided outside the auxiliary valve body, and the protruding ends of the valve stem correspond to each of the bearing assemblies, and the bearing assemblies are used to reduce the friction force of the valve stem when it rotates and provide guidance at the same time.

[0014] Optionally, a limiting device is further provided on the inner wall of the auxiliary valve body, and the limiting device is used to limit the corresponding rotation angle of the valve plate.

[0015] Optionally, a sealing assembly is further provided at the portion of the valve stem extending out of the auxiliary valve body, and the sealing assembly is used to seal the connection between the valve stem and the auxiliary valve body.

[0016] Optionally, a sealing gap is further provided between the auxiliary valve body and the valve stem, and the sealing assembly comprises a packing base pad, a liner, a V-shaped packing, a packing gland and a seasoning pressure plate which are sequentially arranged in the sealing gap from the inside to the outside.

[0017] Optionally, both valve plates are opened in the direction of medium flow.

[0018] Optionally, the bearing assembly includes a lower bearing seat and an upper bearing seat, the lower bearing seat is installed on the outside of the auxiliary valve body, the lower bearing seat is an annular structure, a bearing is installed on the inner wall of the lower bearing seat, the inner ring of the bearing is tightly pressed against the corresponding end of the valve stem, and the upper bearing seat is installed on the lower bearing seat, and the upper bearing seat is used to axially limit the valve stem.

[0019] As described above, a divertable dual-drive end-face sealing butterfly valve of the present invention has the following beneficial effects: it adopts a divertable dual-drive design, the valve plate opens downstream, and has two diverter channels. The two channels can be opened or closed at the same time according to the specific needs of flow regulation, and the different openings of the valve plates in the two channels can also be controlled separately, thereby realizing diverter control in fluid pipeline control, realizing precise flow regulation function in regulating conditions, and having low torque and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a schematic diagram of the structure of an embodiment of the present invention;

[0021] Figure 2 Shown is a schematic cross-sectional structure diagram of a first viewing angle in one embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a cross-sectional structure of a second viewing angle in one embodiment of the present invention is shown;

[0023] Figure 4 Display as Figure 3 A partial enlarged view of the X in the middle;

[0024] Figure 5 Display as Figure 3 A partial enlarged view of the Y position in the middle;

[0025] Figure 6 Shown is a schematic diagram of the connection relationship between two adjacent partitions in one embodiment of the present invention.

[0026] Part Number Description

[0027] 1 Valve body

[0028] 101 Bulkhead

[0029] 102 Auxiliary valve body

[0030] 103 Sealing gasket

[0031] 2 Valve plate

[0032] 3 Actuator

[0033] 4 Valve stem

[0034] 5. Sealing components

[0035] 501 Filling pad

[0036] 502 Pad

[0037] 503 Filler

[0038] 504 Packing gland

[0039] 505 Seasoning Press Plate

[0040] 601 Lower bearing seat

[0041] 602 upper bearing seat

[0042] 7 Support structure DETAILED DESCRIPTION

[0043] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0044] See also Figures 1 to 6 It should be noted that the diagrams provided in the present embodiment only illustrate the basic concept of the present invention in a schematic manner. The diagrams only show the components related to the present invention rather than the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component during implementation can be changed at will, and the component layout type may also be more complicated. The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0045] See also Figures 1 to 6 As shown, the present invention provides a divertable double-driven end-face sealing butterfly valve, which has a simple structure and adopts two semicircular valve plates, realizes a dual-channel design through a double shaft in the same valve, and realizes diverting control and regulation through two actuators, including:

[0046] A valve body 1, wherein a partition plate 101 is provided inside the valve body 1 along its axial direction, and the partition plate 101 divides the inner cavity of the valve body 1 into two flow-dividing channels;

[0047] A valve plate 2 is also provided in each flow dividing channel, wherein the valve plate 2 is a semicircular valve plate used to match the cross section of the flow dividing channel, and two actuators 3 are also provided outside the valve body 1, the actuators 3 correspond to the valve plates 2 one by one, and the actuators 3 are used to adjust the corresponding rotation angle of the valve plates 2;

[0048] The actuator 3 includes a cylinder, a rack, a gear shaft, a stopper and a sealing ring. The rack is usually directly connected to the piston in the cylinder, or connected through a connecting mechanism (such as a connecting rod). When compressed air enters the cylinder, it pushes the piston to move linearly, thereby driving the rack to move linearly, and the rack meshes with the teeth on the gear shaft. When the rack moves linearly, the gear shaft will rotate with it through the meshing action of the gears, and the corresponding valve plate will rotate driven by the gear shaft. A self-locking mechanism is also provided on the actuator to provide additional self-locking force when the gear stops rotating to ensure the stability of the system.

[0049] Self-locking mechanisms such as springs, pins, ratchet mechanisms or electromagnetic locks can provide additional self-locking force when the gear stops rotating to ensure the stability of the system. These devices lock the position of the gear or rack mechanically or electromagnetically to prevent it from accidentally moving due to external factors.

[0050] Furthermore, by using helical gears or bevel gears, the greater friction force generated by the inclination of the tooth surfaces can be utilized to enhance the self-locking effect.

[0051] In one embodiment, the partition 101 and the valve body 1 are manufactured in an integrally formed manner to improve the structural strength.

[0052] It should also be noted that a dual-driven end-face sealing butterfly valve is provided in the present application, which is mainly designed for low-pressure, large-diameter working conditions that require diversion or precise flow control. The overall structure is two semicircular valve plates 2 that drive the semicircular valve plates 2 respectively through actuators 3, and each realizes the switching or switching angle of the valve plates 2 of the two channels, thereby realizing the regulation or cutting off of the medium flow. The two valve plates 2 are respectively controlled by two actuators 3, and can be opened and closed at the same time, opened at the same time, closed at the same time, or opened at different angles at the same time. The flow state in the two diversion channels can be accurately controlled according to the user's adjustment needs, or the diversion function of the medium. When any one of the two valve plates 2 is opened, the diversion function is realized, and the two valve plates are fully opened to realize the confluence of the medium.

[0053] Exemplarily, the valve body 1 includes two axially connected auxiliary valve bodies 102, and a connecting plate is provided inside the auxiliary valve body 102 along its axial direction. The connecting plate divides the inner cavity of the auxiliary valve body 102 into two areas. When the two auxiliary valve bodies 102 are connected, the connecting plates are pressed against each other and are located in the same plane, and the two connecting plates are pressed against each other to form the partition 101.

[0054] It should also be noted that the valve body 1 of the present application is formed by axially connecting two auxiliary valve bodies 102, and the two auxiliary valve bodies 102 are connected by a flange to ensure the stability of the connection.

[0055] It is further explained that when the two auxiliary valve bodies 102 are axially connected, their connection plates abut against each other, and a sealing gasket 103 is provided between two adjacent connection plates, and the sealing gasket 103 is used to enhance the sealing between the connection plates.

[0056] In one of the embodiments, the connection between the two partitions 101 is thickened to provide installation space for the sealing gasket 103 and improve the sealing effect.

[0057] In one of the embodiments, the connection between the two auxiliary valve bodies 102 is sealed and a sealing ring may be provided. When the two auxiliary valve bodies 102 are connected, the sealing ring is tightened by rotating the bolts on the connecting flange to ensure the sealing effect between the two auxiliary valve bodies 102. The sealing ring may be made of rubber material.

[0058] Exemplarily, one actuator 3 and the corresponding valve plate 2 are located on one auxiliary valve body 102 , and another actuator 3 and the corresponding valve plate 2 are located on another auxiliary valve body 102 .

[0059] It should also be noted that when one of the actuators 3 is damaged, the corresponding auxiliary valve body 102 can be replaced to reduce the difficulty and cost of maintenance.

[0060] Exemplarily, the valve plate 2 is disposed in the auxiliary valve body 102 via a valve stem 4 , both ends of the valve stem 4 extend out of the corresponding auxiliary valve body 102 , and the other extended end of the valve stem 4 is connected to the corresponding actuator 3 .

[0061] Among them, a connecting tube is provided at one end of the valve plate 2, and the valve plate 2 is sleeved on the valve stem 4 through the connecting tube. A plurality of reinforcing ribs are also provided between the outer wall of the connecting tube and the side of the valve plate 2, and the distribution direction of the reinforcing ribs is perpendicular to the length direction of the valve stem 4.

[0062] It should also be noted that a stepped anti-falling structure is also provided on the valve stem 4 to prevent the valve stem 4 from flying out during use.

[0063] The stepped anti-falling structure is achieved by gradually reducing the valve stem 4 along its axial direction and providing a corresponding stepped hole on the corresponding valve body 1, so that the valve stem 4 cannot move in the axial direction after installation, thereby preventing the valve body from falling off during long-term use.

[0064] Exemplarily, two bearing assemblies are further provided on the outside of the auxiliary valve body 102, and the protruding ends of the valve stem 4 correspond to each of the bearing assemblies, and the bearing assemblies are used to reduce the friction force of the valve stem 4 when it rotates and provide guidance at the same time.

[0065] It should also be noted that the purpose of setting the bearing assembly is to support and guide the valve stem 4, so that the valve stem 4 can effectively reduce friction when rotating, ensuring the safety performance of the valve. At the same time, the external bearing structure can provide good guidance to ensure that the valve switches smoothly without jamming during use.

[0066] Exemplarily, a limit device is also provided on the inner wall of the auxiliary valve body 102, and the limit device is used to limit the corresponding rotation angle of the valve plate 2. The limit device is a baffle, which is arranged on the inner wall of the valve body 1 and the inner wall of the partition 101, and the baffle is perpendicular to the inner wall of the valve body 1 and the inner wall of the partition 101.

[0067] It should also be noted that the purpose of providing the limiting device is to prevent the valve plate 2 from rotating at an excessively large angle during rotation, thereby preventing the valve plate 2 from being damaged.

[0068] Exemplarily, a sealing component 5 is further provided at the portion of the valve stem 4 extending out of the auxiliary valve body 102 , and the sealing component 5 is used to seal the connection between the valve stem 4 and the auxiliary valve body 102 .

[0069] It should also be noted that the purpose of providing the sealing assembly 5 is to prevent the medium from leaking out from the gap between the valve stem 4 and the auxiliary valve body 102 during use of the valve.

[0070] Exemplarily, a sealing gap is further provided between the auxiliary valve body 102 and the valve stem 4, and the sealing assembly 5 includes a packing base 501, a gasket 502, a V-shaped packing 503, a packing gland 504 and a seasoning pressure plate 505 which are sequentially arranged in the sealing gap from the inside to the outside.

[0071] It should also be noted that the use of V-type PTFE packing can effectively solve the problem of valve medium leakage. At the same time, the friction coefficient of V-type PTFE packing is small, which can reduce the overall friction resistance of the valve, thereby further reducing the torque required by the actuator, further reducing the actuator configuration of the valve, and reducing the cost of the whole machine.

[0072] Exemplarily, the two valve plates 2 are both opened in the direction of medium flow.

[0073] It should also be noted that both valve plates 2 are opened in the direction of medium flow. The innovative application of this structure allows the valve to work under the push of the medium, with a very low opening torque, thereby reducing the configuration of the actuator, and the cost is well controlled, avoiding the need for higher power requirements when opening or closing the valve plate.

[0074] Exemplarily, the bearing assembly includes a lower bearing seat 601 and an upper bearing seat 602, wherein the lower bearing seat 601 is installed on the outside of the auxiliary valve body 102, the lower bearing seat 601 is an annular structure, a bearing is installed on the inner wall of the lower bearing seat 601, the inner ring of the bearing is tightly pressed against the corresponding end of the valve stem 4, the upper bearing seat 602 is installed on the lower bearing seat 601, and the upper bearing seat 602 is used to axially limit the valve stem 4.

[0075] A through hole is provided on the upper bearing seat 602 close to the actuator 3 , and the valve stem 4 passes through the through hole to be connected with the corresponding actuator 3 .

[0076] In one embodiment, the actuator 3 is driven by a motor, and the motor drives the corresponding valve stem 4 to rotate, and the rotation angle is between 0-90°. The motor of the actuator 3 is a low-speed motor.

[0077] In one embodiment, the actuator 3 is a gear rack actuator, which is a linear actuator with mechanical gear transmission, and has a relatively simple structure, consisting of a motor, a reduction mechanism, a gear, a rack, etc. This simple structure makes the actuator easy to install and maintain, and the gear transmission method also has strong anti-impact and anti-vibration capabilities, ensuring the stability of the actuator during operation.

[0078] Among them, the limit blocks are usually installed at both ends of the actuator to limit the stroke of the rack. When the rack moves to the limit block, it will be blocked and stop moving, thereby ensuring that the actuator moves within the specified range. When compressed air enters the cylinder, it pushes the piston to move linearly. The movement of the piston is transmitted to the rack in some way (direct connection or indirect connection), causing the rack to move linearly. The movement of the rack meshes with the gear on the gear shaft, driving the gear shaft to rotate. Finally, the opening and closing of the valve is controlled by the rotation of the gear shaft.

[0079] It should also be noted that the upper bearing seat 602 is installed on the lower bearing seat 601 by bolts, and its bearing is a deep groove ball bearing. This type of bearing has a small friction coefficient and a high maximum speed, which helps to reduce energy loss and heat and improve mechanical efficiency. The structure of the deep groove ball bearing is relatively simple, usually consisting of an outer ring, an inner ring, a group of steel balls and a retaining cage, which makes its cost relatively low.

[0080] In one of the embodiments, a support structure 7 is further provided below the valve body 1, and the support structure 7 is connected to the flange surface of the auxiliary valve body 102 by screws. The support structure 7 is a height-adjustable support bracket, and the support structure 7 supports the valve body 1 to reduce the pipeline load on site.

[0081] It is further explained that the supporting leg includes a fixed part and a movable part, the movable part is arranged on the fixed part through a screw thread, and the height between the two is adjusted by rotating the screw, wherein the fixed part is used to support the ground or other components, and the fixed part may include three supporting legs, and the supporting legs are used to increase the contact area.

[0082] To sum up, a divertable dual-drive end-face sealing butterfly valve of the present invention adopts a divertable dual-drive design, and the valve plate opens downstream and has two diverter channels. The two channels can be opened or closed at the same time according to the specific needs of flow regulation, and the different openings of the valve plates in the two channels can also be controlled separately, thereby realizing diverter control in fluid pipeline control, realizing precise flow regulation function in regulating conditions, and having low torque and low cost.

[0083] When in use, the present application can also be connected to multiple auxiliary valve bodies 102, so that the two flow channels in the valve body 1 formed by the connection have multiple valve plates along the flow direction of the medium. The flow rate of the medium can be adjusted in the fluid pipeline control by controlling the different openings of the multi-gradient control valve plates.

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A divertable double-drive end-face sealing butterfly valve, characterized in that: include: A valve body, wherein a partition is provided inside the valve body along its axial direction, and the partition divides the inner cavity of the valve body into two diversion channels; A valve plate is also provided in each flow-dividing channel, and two actuators are also provided outside the valve body, the actuators correspond to the valve plates one by one, and the actuators are used to adjust the corresponding rotation angle of the valve plates; The actuator includes a cylinder, a rack, a gear shaft, a stopper and a sealing ring. The rack is directly connected to the piston in the cylinder. When compressed air enters the cylinder, it pushes the piston to move linearly, thereby driving the rack to move linearly. The rack meshes with the teeth on the gear shaft. When the rack moves linearly, the gear shaft rotates through the meshing action of the gears, and the corresponding valve plate is driven to rotate by the gear shaft. A self-locking mechanism is also provided on the actuator.

2. A divertible double-drive end-face sealing butterfly valve according to claim 1, characterized in that: The valve body includes two axially connected auxiliary valve bodies, and a connecting plate is provided inside the auxiliary valve body along its axial direction. The connecting plate divides the inner cavity of the auxiliary valve body into two areas. When the two auxiliary valve bodies are connected, the connecting plates are pressed against each other and located in the same plane, and the two connecting plates are pressed against each other to form the partition.

3. A divertible double-drive end-face sealing butterfly valve according to claim 2, characterized in that: One of the actuators and the corresponding valve plate is located on one auxiliary valve body, and another of the actuators and the corresponding valve plate is located on another auxiliary valve body.

4. A divertible double-drive end-face sealing butterfly valve according to claim 3, characterized in that: The valve plate is arranged in the auxiliary valve body through a valve stem, two ends of the valve stem extend out of the corresponding auxiliary valve body, and the other extended end of the valve stem is connected to the corresponding actuator.

5. A divertable double-drive end-face sealing butterfly valve according to claim 4, characterized in that: Two bearing assemblies are also provided outside the auxiliary valve body, and the protruding ends of the valve stem correspond to each of the bearing assemblies. The bearing assemblies are used to reduce the friction force of the valve stem when it rotates and provide guidance at the same time.

6. A divertible double-drive end-face sealing butterfly valve according to claim 5, characterized in that: A limiting device is also provided on the inner wall of the auxiliary valve body, and the limiting device is used to limit the corresponding rotation angle of the valve plate.

7. A divertible double-drive end-face sealing butterfly valve according to claim 6, characterized in that: A sealing assembly is also provided at the portion where the valve stem extends out of the auxiliary valve body, and the sealing assembly is used to seal the connection between the valve stem and the auxiliary valve body.

8. A divertible double-drive end-face sealing butterfly valve according to claim 7, characterized in that: A sealing gap is also arranged between the auxiliary valve body and the valve stem, and the sealing assembly comprises a packing base pad, a liner, a V-shaped packing, a packing gland and a seasoning pressure plate which are arranged in the sealing gap from the inside to the outside in sequence.

9. A divertible double-drive end-face sealing butterfly valve according to claim 8, characterized in that: The two valve plates are both opened in the direction of medium flow.

10. A divertable double-drive end-face sealing butterfly valve according to claim 9, characterized in that: The bearing assembly includes a lower bearing seat and an upper bearing seat, wherein the lower bearing seat is mounted on the outside of the auxiliary valve body, the lower bearing seat is an annular structure, a bearing is mounted on the inner wall of the lower bearing seat, the inner ring of the bearing is tightly pressed against the corresponding end of the valve stem, and the upper bearing seat is mounted on the lower bearing seat, and the upper bearing seat is used to axially limit the valve stem.

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