Anti-scouring butterfly valve

Abstract

The utility model relates to an anti-scour butterfly valve, which relates to the technical field of valves, and comprises an inlet, an outlet, a valve body, a valve rod, a butterfly plate, a driving mechanism and a protection mechanism, the inlet and the outlet are both communicated with the valve body, the valve rod is rotatably connected to the valve body, the driving mechanism is arranged on the valve body, the driving mechanism is in transmission connection with the valve rod, and the protection mechanism is arranged on the butterfly plate. The driving mechanism is used for driving the valve rod to rotate, the butterfly plate is arranged at the end, away from the driving mechanism, of the valve rod and located in the valve body, the protection mechanism comprises a protection plate and a connecting assembly, and the protection plate is rotationally connected to the face, close to the inlet, of the butterfly plate through the connecting assembly. The butterfly valve can prevent a medium from scouring the sealing surface of the butterfly plate and protect the sealing ring, so that the valve can adapt to the working condition of a high-flow-rate medium, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The present application relates to the field of valves, and in particular to an anti-scouring butterfly valve. Background Art

[0002] The butterfly valve is a valve that opens and closes by rotating the valve stem and driving the valve plate to rotate. In the channel of the butterfly valve body, the valve plate rotates around the axis. When the butterfly valve is fully opened, it has a small flow resistance. When it is opened between about 15° and 70°, it can also perform sensitive flow control. Therefore, in the field of large-caliber regulation, the butterfly valve has become one of the fastest-growing valve varieties in the past decade due to its good flow regulation function and closing and sealing characteristics. The scope of use is very wide. Moreover, the variety and quantity of butterfly valves used are still expanding, and they are developing in the direction of high temperature, high pressure, large diameter, high sealing, long life, convenient adjustment, and one valve with multiple functions.

[0003] A butterfly valve in the related technology, currently, a sealed butterfly valve in the Chinese utility model patent application with a publication date of April 27, 2021 and publication number CN213064650U, includes an annular shell, and the annular shell is provided with a built-in groove, a through groove, a limit plate I and a limit plate II, the built-in groove is located at the bottom of the interior of the annular shell, the through groove is located above the interior of the annular shell, the limit plate I and the limit plate II are fixedly connected to the inner surface of the annular shell by welding, a bearing is provided inside the built-in groove, the bearing is connected to the butterfly plate through a fixed shaft, a driving shaft is provided inside the through groove, and a sealing gasket is provided on the outer surface of the butterfly plate.

[0004] However, the soft sealing layer on the side of the valve plate of this butterfly valve close to the fluid medium input end will be continuously eroded by the conveyed medium. Long-term frontal erosion will cause damage to the soft sealing layer of the valve plate, thereby shortening the service life of the valve; and failure of the valve seal will cause medium leakage. The potential safety hazard may cause production to be forced to stop, thereby reducing production efficiency, so improvement is needed. Utility Model Content

[0005] An embodiment of the present application provides an anti-scouring butterfly valve, which can improve the technical problem existing in the related art that the soft sealing layer on the side of the valve plate of the butterfly valve close to the fluid medium input end is constantly scoured by the conveyed medium, and long-term frontal scouring will cause damage to the soft sealing layer of the valve plate, thereby shortening the service life of the valve.

[0006] The embodiment of the present application provides an anti-scouring butterfly valve, comprising:

[0007] It includes an inlet, an outlet, a valve body, a valve stem, a butterfly plate, a driving mechanism and a protection mechanism, the inlet and the outlet are both connected to the valve body, the valve stem is rotatably connected to the valve body, the driving mechanism is arranged on the valve body, the driving mechanism is transmission-connected to the valve stem for driving the valve stem to rotate, the butterfly plate is arranged on the end of the valve stem away from the driving mechanism, the butterfly plate is located inside the valve body, the protection mechanism includes a protection plate and a connecting assembly, the protection plate is rotatably connected to a surface of the butterfly plate close to the inlet through the connecting assembly.

[0008] The above-mentioned technical scheme in the embodiment of the present application has at least the following technical effects: when the butterfly plate is opened, after the butterfly plate rotates to a certain angle, the butterfly plate will drive the protective plate to rotate together, so that the protective plate covers the circumferential surface of the butterfly plate, thereby preventing the soft sealing layer on the circumferential surface of the butterfly plate from being continuously eroded by the conveyed medium and causing damage, thereby increasing the service life of the valve. Since the size of the protective plate is larger than that of the butterfly plate, even if the butterfly plate is not fully rotated to a vertical state, the protective plate can still cover the soft sealing layer on the circumferential surface of the butterfly plate.

[0009] An anti-scour butterfly valve provided in the embodiment of the present application can be provided with a protective plate and a connecting component on the butterfly plate. When the butterfly valve is opened, the connecting component can control the protective plate to approach the butterfly plate and cover the sealing ring on the butterfly plate, thereby protecting the sealing ring and preventing the medium from scouring the sealing ring, thereby improving the service life of the butterfly valve. At the same time, the setting of the limit assembly effectively limits the position of the butterfly plate when it rotates to be parallel to the annular shell, reduces the probability of water leakage when the butterfly valve is in use, and improves the sealing performance of the butterfly valve when it is closed.

[0010] In some embodiments, the protection plate includes a first diverter portion and a second diverter portion, the first diverter portion is rotatably connected to the butterfly plate close to the inlet side through a connecting assembly, and the second diverter portion is fixedly connected to the end of the first diverter portion away from the connecting assembly.

[0011] In some embodiments, the connecting assembly includes a support rod, a ball shell, a universal ball, a connecting rod and a connecting spring, one end of the support rod is arranged on the butterfly plate, the ball shell is arranged on the other end of the support rod, the universal ball is arranged in the ball shell, a through groove is opened on the ball shell, one end of the connecting rod passes through the through groove and is connected to the universal ball, the other end of the connecting rod is connected to the first diversion part, one end of the connecting spring is connected to the butterfly plate, and the other end of the connecting spring is fixedly connected to the first diversion part close to the butterfly plate.

[0012] In some embodiments, the connection assembly further includes a gasket, which is disposed on a surface of the butterfly plate close to the inlet, and one end of the connection spring is fixedly connected to the gasket.

[0013] In some embodiments, the driving mechanism includes a rotating handle, a rotating shaft, a rotating shaft, a driving wheel, a driven wheel and an installation box, the rotating shaft is horizontally arranged in the installation box, one end of the rotating shaft is rotatably connected to the inner wall of the installation box, the other end of the rotating shaft penetrates the installation box and extends outward, the rotating handle is arranged on the other end of the rotating shaft, the driving wheel is sleeved on the rotating shaft, the driven wheel is arranged inside the installation box, the driving wheel and the driven wheel are meshed with each other, one end of the top of the rotating shaft is fixedly connected to the driven wheel, the other end of the rotating shaft penetrates the installation box and extends outward, and the other end of the rotating shaft is fixedly connected to the valve stem.

[0014] In some embodiments, a sealing gasket is further provided on the butterfly plate, a groove is provided on the outer peripheral surface of the disc plate, the sealing gasket is sleeved on the disc plate, and the sealing gasket is located in the groove.

[0015] In some embodiments, a limit assembly is also provided inside the valve body, and the limit assembly includes a first limit plate and a second limit plate. The first limit plate is provided on a side close to the water inlet at the connection between the valve body and the butterfly plate, and the second limit plate is provided on a side close to the water outlet at the connection between the valve body and the butterfly plate. The first limit plate and the second limit plate are both fixedly connected to the inner wall of the valve body.

[0016] In some embodiments, a flange is provided at one end of the inlet and the outlet away from the valve body, and a plurality of flange holes are provided on the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an anti-scour butterfly valve provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the internal structure of an anti-scour butterfly valve provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of a connection assembly of an anti-scour butterfly valve provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of a drive assembly of an anti-scour butterfly valve provided in an embodiment of the present application.

[0022] Among them, the reference numerals in the figure are:

[0023] 100, valve body; 200, valve stem; 300, butterfly plate; 410, protection plate; 411, first diversion part; 412, second diversion part; 420, connecting rod; 421, support rod; 422, ball shell; 423, universal ball; 424, through groove; 425, gasket; 426, connecting spring; 510, rotating handle; 520, rotating shaft; 530, rotating shaft; 540, driving wheel; 550, driven wheel; 560, installation box; 600, sealing gasket; 710, first limit plate; 720, second limit plate; 810, flange; 820, flange hole. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] It should be noted that, in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] The butterfly valve is a valve that opens and closes by rotating the valve stem and driving the valve plate to rotate. In the channel of the butterfly valve body, the valve plate rotates around the axis. When the butterfly valve is fully opened, it has a small flow resistance. When it is opened between about 15° and 70°, it can also perform sensitive flow control. Therefore, in the field of large-caliber regulation, the butterfly valve has become one of the fastest-growing valve varieties in the past decade due to its good flow regulation function and closing and sealing characteristics. The scope of use is very wide. Moreover, the variety and quantity of butterfly valves used are still expanding, and they are developing in the direction of high temperature, high pressure, large diameter, high sealing, long life, convenient adjustment, and one valve with multiple functions.

[0032] However, a sealed butterfly valve applied for in Chinese utility model patent with publication number CN213064650U has a soft sealing layer on the side of the valve plate close to the fluid medium input end which is constantly eroded by the conveyed medium. Long-term frontal erosion may damage the soft sealing layer of the valve plate, thereby shortening the service life of the valve. Moreover, failure of the valve seal may cause medium leakage. The potential safety hazard may cause production to be forced to stop, thereby reducing production efficiency. Therefore, improvement is needed.

[0033] Based on this, in order to improve the technical problem in the related art that the soft sealing layer on the side of the butterfly valve plate close to the fluid medium input end is constantly eroded by the transported medium, and long-term frontal erosion will cause damage to the soft sealing layer of the valve plate, thereby shortening the service life of the valve, the embodiment of the present application provides the following solution.

[0034] Please also read Figures 1 to 3 The embodiment of the present application provides an anti-scour butterfly valve, including an inlet, an outlet, a valve body 100, a valve stem 200, a butterfly plate 300, a driving mechanism and a protection mechanism, the inlet and the outlet are both connected to the valve body 100, the valve stem 200 is rotatably connected to the valve body 100, the driving mechanism is arranged on the valve body 100, the driving mechanism is transmission-connected to the valve stem 200, and is used to drive the valve stem 200 to rotate, the butterfly plate 300 is arranged on an end of the valve stem 200 away from the driving mechanism, the butterfly plate 300 is located inside the valve body 100, the protection mechanism includes a protection plate 410 and a connecting assembly, and the protection plate 410 is rotatably connected to a surface of the butterfly plate 300 close to the inlet through the connecting assembly.

[0035] From the above, it can be seen that when the butterfly plate 300 is opened, after the butterfly plate 300 rotates to a certain angle, the butterfly plate 300 will drive the protection plate 410 to rotate together, so that the protection plate 410 covers the circumferential surface of the butterfly plate 300, thereby preventing the soft sealing layer on the circumferential surface of the butterfly plate 300 from being continuously eroded by the conveyed medium and causing damage, thereby increasing the service life of the valve. Since the protection plate 410 is larger than the butterfly plate 300, even if the butterfly plate 300 is not fully rotated to a vertical state, the protection plate 410 can also cover the soft sealing layer on the circumferential surface of the butterfly plate 300.

[0036] In some embodiments, please refer to Figures 1 to 3 The protection plate 410 includes a first diverter portion 411 and a second diverter portion 412. The first diverter portion 411 is rotatably connected to the butterfly plate 300 close to the inlet side through a connecting component, and the second diverter portion 412 is fixedly connected to the first diverter portion 411 away from the connecting component.

[0037] In this way, when the butterfly plate 300 rotates to drive the first diversion part 411 to rotate, the angle formed between the second diversion part 412 and the first diversion part 411 will wrap the soft sealing layer on the circumferential surface of the butterfly plate 300, thereby protecting the soft sealing layer on the circumferential surface of the butterfly plate 300, preventing the medium from scouring the soft sealing layer, and improving the service life of the butterfly valve. At the same time, the first diversion part 411 and the second diversion part 412 can divert water.

[0038] Optionally, in some embodiments, see Figures 1 to 3The connecting assembly includes a support rod 421, a ball shell 422, a universal ball 423, a connecting rod 420 and a connecting spring 426, one end of the support rod 421 is arranged on the butterfly plate 300, the ball shell 422 is arranged on the other end of the support rod 421, the universal ball 423 is arranged in the ball shell 422, a through groove 424 is opened on the ball shell 422, one end of the connecting rod 420 passes through the through groove 424 and is connected to the universal ball 423, the other end of the connecting rod 420 is connected to the first diversion part 411, one end of the connecting spring 426 is connected to the butterfly plate 300, and the other end of the connecting spring 426 is fixedly connected to the first diversion part 411 close to the butterfly plate 300.

[0039] In this arrangement, the universal ball 423 is rotatably connected in the cavity formed by the ball shell 422, and a through groove for the connection rod 420 to rotate is provided on the surface of the ball shell 422. Driven by the connection rod 420, the protection plate 410 rotates to protect the soft sealing layer on the circumferential surface of the butterfly plate 300. At the same time, under the action of the elastic force of the connecting spring 426, the first diversion part 411 and the second diversion part 412 can be prevented from being washed out of the predetermined position, thereby failing to play a protective effect.

[0040] Optionally, see Figures 1 to 3 The connecting assembly further includes a gasket 425 , which is disposed on a surface of the butterfly plate 300 close to the inlet, and one end of the connecting spring 426 is fixedly connected to the gasket 425 .

[0041] In this configuration, the direct connection between the connecting spring 426 and the butterfly plate 300 may damage the surface of the butterfly plate 300. By disposing a gasket 425 on the surface of the butterfly plate 300, the butterfly plate 300 can be protected.

[0042] In some embodiments, see Figures 1 to 3 The driving mechanism includes a rotating handle 510, a rotating shaft 520, a rotating shaft 530, a driving wheel 540, a driven wheel 550 and an installation box 560. The rotating shaft 520 is horizontally arranged in the installation box 560, one end of the rotating shaft 520 is rotatably connected to the inner wall of the installation box 560, and the other end of the rotating shaft 520 penetrates the installation box 560 and extends outwardly. The rotating handle 510 is arranged on the other end of the rotating shaft 520, the driving wheel 540 is sleeved on the rotating shaft 520, and the driven wheel 550 is arranged inside the installation box 560. The driving wheel 540 and the driven wheel 550 are meshed with each other, and one end of the top of the rotating shaft 530 is fixedly connected to the driven wheel 550, the other end of the rotating shaft 530 penetrates the installation box 560 and extends outwardly, and the other end of the rotating shaft 530 is fixedly connected to the valve stem 200.

[0043] With such arrangement, when the butterfly plate 300 is to be controlled, the rotating handle is turned to drive the rotating shaft 520 and the driving wheel 540 sleeved thereon to rotate, and the driving wheel 540 drives the driven wheel 550 meshing therewith to rotate, so that the rotating shaft 530 rotates with the valve stem 200 fixedly connected thereto, thereby driving the rotation of the butterfly plate 300, thereby achieving the function of switching and closing the butterfly valve. The structure is simple to use and has improved practicality.

[0044] Optionally, see Figures 1 to 3 A sealing gasket 600 is also provided on the butterfly plate 300. A groove is opened on the outer peripheral surface of the butterfly plate 300. The sealing gasket 600 is sleeved on the butterfly plate 300, and the sealing gasket 600 is located in the groove.

[0045] In this way, by arranging the sealing gasket 600 on the butterfly plate 300, the probability of water leakage when the butterfly valve is in use can be reduced, and the sealing performance of the butterfly valve when it is closed can be improved.

[0046] Optionally, in some embodiments, see Figures 1 to 3 A limit assembly is also provided inside the valve body 100, and the limit assembly includes a first limit plate 710 and a second limit plate 720. The first limit plate 710 is provided on a side of the connection between the valve body 100 and the butterfly plate 300 close to the water inlet, and the second limit plate 720 is provided on a side of the connection between the valve body 100 and the butterfly plate 300 close to the water outlet. The first limit plate 710 and the second limit plate 720 are both fixedly connected to the inner wall of the valve body 100.

[0047] With such arrangement, when the butterfly plate 300 is closed, the sealing gasket 600 on the butterfly plate 300 will adhere to the surfaces of the first limit plate 710 and the second limit plate 720, effectively limiting the position of the butterfly plate 300 when it rotates to be parallel to the annular shell, reducing the probability of water leakage when the butterfly valve is in use and improving the sealing of the butterfly valve when it is closed.

[0048] Optionally, see Figures 1 to 3 A flange 810 is provided at one end of the inlet and the outlet away from the valve body 100 , and a plurality of flange holes 820 are provided on the flange 810 .

[0049] In this configuration, the flange 810 is welded and fixed to the inlet and outlet, and a plurality of flange holes 820 are provided on the flange 810 to facilitate the connection of the inlet and outlet with external pipelines for drainage and gas transmission.

[0050] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An anti-scour butterfly valve, characterized in that: The valve comprises an inlet, an outlet, a valve body (100), a valve stem (200), a butterfly plate (300), a driving mechanism and a protection mechanism, wherein the inlet and the outlet are both connected to the valve body (100), the valve stem (200) is rotatably connected to the valve body (100), the driving mechanism is arranged on the valve body (100), the driving mechanism is transmission-connected to the valve stem (200) and is used to drive the valve stem (200) to rotate, the butterfly plate (300) is arranged on one end of the valve stem (200) away from the driving mechanism, and the butterfly plate (300) is located inside the valve body (100); The protection mechanism comprises a protection plate (410) and a connection assembly, and the protection plate (410) is rotatably connected to a surface of the butterfly plate (300) close to the inlet through the connection assembly.

2. The anti-scour butterfly valve according to claim 1, characterized in that: The protection plate (410) comprises a first diverter portion (411) and a second diverter portion (412); the first diverter portion (411) is rotatably connected to a surface of the butterfly plate (300) close to the inlet via a connecting assembly; and the second diverter portion (412) is fixedly connected to an end of the first diverter portion (411) away from the connecting assembly.

3. The anti-scour butterfly valve according to claim 2, characterized in that: The connecting assembly comprises a support rod (421), a ball shell (422), a universal ball (423), a connecting rod (420) and a connecting spring (426); one end of the support rod (421) is arranged on the butterfly plate (300); the ball shell (422) is arranged on the other end of the support rod (421); the universal ball (423) is arranged in the ball shell (422); a through slot (424) is provided on the ball shell (422); one end of the connecting rod (420) passes through the through slot (424) and is connected to the universal ball (423); the other end of the connecting rod (420) is connected to the first diversion part (411); one end of the connecting spring (426) is connected to the butterfly plate (300); and the other end of the connecting spring (426) is fixedly connected to a side of the first diversion part (411) close to the butterfly plate (300).

4. The anti-scour butterfly valve according to claim 3, characterized in that: The connection assembly further comprises a gasket (425), wherein the gasket (425) is arranged on a surface of the butterfly plate (300) close to the inlet, and one end of the connection spring (426) is fixedly connected to the gasket (425).

5. The anti-scour butterfly valve according to claim 4, characterized in that: The driving mechanism comprises a rotating handle (510), a rotating shaft (520), a rotating shaft (530), a driving wheel (540), a driven wheel (550) and an installation box (560); the rotating shaft (520) is horizontally arranged in the installation box (560); one end of the rotating shaft (520) is rotatably connected to the inner wall of the installation box (560); the other end of the rotating shaft (520) penetrates the installation box (560) and extends outward; the rotating handle (510) is arranged on the rotating shaft (5 20), the driving wheel (540) is sleeved on the rotating shaft (520), the driven wheel (550) is arranged inside the mounting box (560), the driving wheel (540) and the driven wheel (550) are meshed with each other, one end of the top of the rotating shaft (530) is fixedly connected to the driven wheel (550), the other end of the rotating shaft (530) passes through the mounting box (560) and extends outward, and the other end of the rotating shaft (530) is fixedly connected to the valve stem (200).

6. The anti-scour butterfly valve according to claim 5, characterized in that: The butterfly plate (300) is also provided with a sealing gasket (600). A groove is provided on the outer peripheral surface of the butterfly plate (300). The sealing gasket (600) is sleeved on the butterfly plate (300), and the sealing gasket (600) is located in the groove.

7. The anti-scour butterfly valve according to claim 6, characterized in that: A limit assembly is also arranged inside the valve body (100), and the limit assembly comprises a first limit plate (710) and a second limit plate (720). The first limit plate (710) is arranged on a side close to the water inlet at the connection between the valve body (100) and the butterfly plate (300), and the second limit plate (720) is arranged on a side close to the water outlet at the connection between the valve body (100) and the butterfly plate (300). The first limit plate (710) and the second limit plate (720) are both fixedly connected to the inner wall of the valve body (100).

8. The anti-scour butterfly valve according to claim 7, characterized in that: A flange (810) is provided at one end of the inlet and the outlet away from the valve body (100), and a plurality of flange holes (820) are provided on the flange (810).

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