Butterfly valve for online inspection and maintenance

Abstract

The invention provides an online inspection and maintenance butterfly valve, which relates to the technical field of valves, and comprises a valve body and an inspection and maintenance assembly, the two ends of the valve body are fixedly connected with a front end flange and a rear end flange respectively, the valve body is provided with a maintenance assembly, and the check valve is characterized in that the maintenance assembly comprises a notch, the notch is formed in one end of the top of the valve body, and the two sides of the valve body are fixedly connected with extending convex plates. During maintenance, the main flow channel can be closed and switched to the flow dividing branch pipes to circulate media, the defect that in traditional maintenance, shutdown and flow cutoff are needed is overcome, economic losses caused by production stagnation due to shutdown are fundamentally eliminated, in addition, after limitation of the butt joint supporting plate is removed, parts in the valve body can be maintained, multiple sets of flange bolts do not need to be disassembled one by one, and the maintenance cost is reduced. The maintenance time is shortened, meanwhile, the risk of pipeline sealing failure caused by disassembly and assembly of a connecting bolt of the valve body and the pipeline is avoided, and the sealing performance of the pipeline is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a butterfly valve for online inspection and maintenance. Background Technology

[0002] In pipeline systems with extremely high requirements for continuous production and transportation, such as those in the petroleum, chemical, and municipal water supply and drainage industries, butterfly valves, with their advantages of compact structure, convenient opening and closing, and flexible flow regulation, have become the core component for controlling the on-off state and flow of the medium. They directly affect the operating efficiency and stability of the entire pipeline system. However, during long-term service, internal parts are prone to sealing failure due to media erosion, corrosion, and wear. Therefore, to ensure the safe operation of the pipeline system, when the internal parts of the butterfly valve experience sealing failure or performance degradation, they need to be disassembled regularly for inspection, repair, or replacement to restore the sealing performance and control function of the butterfly valve.

[0003] Currently, the maintenance of existing butterfly valves typically requires first shutting down the system and cutting off the flow, closing the pipeline valve at the top of the butterfly valve to cut off the medium flow, and then removing the entire butterfly valve from the pipeline by disassembling the flange bolts, etc., before internal component maintenance can be carried out. However, this maintenance method has several drawbacks: First, for some industries with continuous production, shutting down the system and cutting off the flow will cause the entire production line to stop, resulting in huge economic losses; Second, disassembling the butterfly valve requires disassembling multiple sets of flange bolts one by one, making the maintenance process cumbersome and time-consuming, which seriously reduces the operation and maintenance efficiency of the pipeline system; Third, repeated disassembly and assembly of the valve body can easily damage the flatness of the flange sealing surface, affecting the sealing performance of the connection. Therefore, developing a butterfly valve that can be maintained and repaired without shutting down the system has become a key requirement to solve the above problems. Summary of the Invention

[0004] In view of this, the present invention provides a butterfly valve for online inspection and maintenance. Through the configuration of the maintenance components and the coordinated action of the first shut-off valve, the diversion branch pipe, and the second shut-off valve, the main flow channel can be closed and the flow medium switched to the diversion branch pipe during maintenance. This avoids the drawback of traditional maintenance requiring machine shutdown and flow interruption, fundamentally eliminating economic losses caused by production stoppages. Furthermore, by releasing the limiting position of the connecting support plate, the internal parts of the valve body can be inspected without disassembling multiple sets of flange bolts one by one. This not only shortens maintenance time but also avoids the risk of pipeline sealing failure caused by disassembling the connecting bolts between the valve body and the pipeline, ensuring the pipeline's sealing performance. Through the configuration of the disassembly components, and the matching structure of the connecting bracket and the connecting groove, along with the engaging design of the locking block and locking slot, the valve plate and valve stem form a detachable connection. When damaged by media scouring, corrosion, or wear, it is not necessary to replace the entire valve plate and valve stem assembly; only the damaged valve plate needs to be disassembled and replaced individually. This significantly reduces the scrap rate of reusable parts, lowers the cost of spare parts procurement and replacement, and the convenient disassembly method allows for quick valve plate removal, shortening replacement time and improving operational efficiency. The filter assembly, with its filter screen, effectively filters impurities from the media, preventing internal parts from becoming stuck. Furthermore, it reduces the subsequent flow rate of the media as it passes through the filter screen, thereby reducing the impact force on the valve plate. The filter screen uses a plug-in design, combined with an automatic locking mechanism based on media pressure and a spring-reset unlocking mechanism after flow stops. This ensures the filter screen is stable during operation and allows for easy removal and cleaning after the media stops, eliminating the need for complex operations and improving maintenance efficiency.

[0005] This invention provides a butterfly valve for online inspection and maintenance, specifically including: a valve body and an inspection and maintenance assembly; The valve body is fixedly connected to a front flange and a rear flange at both ends, and the valve body is provided with a maintenance assembly, characterized in that the maintenance assembly includes: Notch: It is opened at one end of the top of the valve body. Extended protrusions are fixedly connected to both sides of the valve body. The extended protrusions are provided with moving grooves. Cross slide grooves are provided on the outer side of the moving grooves. The bottom of the extended protrusions is provided with a locking shaft groove. Rotary collar: Rotatably installed in the rotary shaft groove, with a connecting screw ring fixedly connected to the bottom of the rotary collar; Moving screw: It is located in the moving groove. A limit cross bar is fixedly connected to the outside of the moving screw. The limit cross bar is slidably installed in the cross groove. A limit arc plate is fixedly connected to the top end of the moving screw. Connecting support plate: Located at the notched slot, the connecting support plate has through slots on both sides of both ends. A valve seat is fixedly connected to the top of the connecting support plate, and a motor is fixedly installed on the top of the valve seat. The drive end of the motor is fixedly connected to the valve stem at the bottom. The bottom end of the valve stem is rotatably installed in the middle of the rotating support plate. At the same time, limit vertical plates are fixedly connected to both ends of the rotating support plate. Limiting ring: Located at the top of the connecting support plate, the limiting ring has a locking arc groove, and the limiting arc plate is fitted and locked in the locking arc groove. At the same time, the limiting ring also has a through groove that intersects with the locking arc groove. First shut-off valve: Located on the front flange, and a branch pipe is fixedly connected between the front flange and the rear flange, with a second shut-off valve fixedly installed at one end of the branch pipe.

[0006] Furthermore, the valve stem is provided with splitting components on both sides. The splitting components include connecting brackets, movable grooves and isolation plates. Connecting brackets are fixedly connected to both sides of the valve stem. Movable grooves are opened inside the connecting brackets. An isolation plate is fixedly connected to the middle of the movable groove.

[0007] Furthermore, fixed vertical rods are fixedly connected between the two sides of the isolation plate and the two ends of the movable groove, and a first spring is provided on the outer side of the fixed vertical rods.

[0008] Furthermore, the movable groove is provided with a movable slide plate, which has a limit hole. The movable slide plate is slidably installed on the outside of the fixed vertical rod through the limit hole, and a locking block is fixedly connected to one end of the outer side of the movable slide plate.

[0009] Furthermore, a sliding groove is provided on one side of the connecting bracket, and the movable sliding plate passes through the sliding groove and is fixedly connected to the outer connecting T plate.

[0010] Furthermore, valve plates are provided on both sides of the connecting protrusion, and a mating groove is provided on the side of the valve plate near the connecting protrusion. Locking slots are provided at the upper and lower ends of the mating groove, and locking blocks are inserted into the locking slots through the connecting protrusion.

[0011] Furthermore, the valve body is equipped with a filter assembly inside, which includes a limiting insert, a connecting frame, a filter screen, a connecting top plate, and a handle. The limiting insert is fixedly connected inside the valve body, and a connecting frame is inserted between the limiting inserts. The connecting frame is equipped with a filter screen inside, and a connecting top plate is fixedly connected to the top of the connecting frame. A handle is fixedly connected to the top center of the connecting top plate.

[0012] Furthermore, a fixed support frame is fixedly connected to both sides of one end of the limiting insert, and guide grooves are provided at the upper and lower ends of the fixed support frame. A fixed slide rod is fixedly connected inside the guide groove, and a second spring is provided on the outside of the fixed slide rod.

[0013] Furthermore, a movable slider is provided in the middle of the fixed support frame, and extension protrusions are fixedly connected to the upper and lower ends of the movable slider. The extension protrusions are slidably mounted on the fixed slide rod through guide holes.

[0014] Furthermore, a connecting protrusion is fixedly connected to one side of the movable slider opposite to it, and a connecting rod is fixedly connected to the side of the movable slider near the limiting insert. A limiting insert hole is opened in the middle of the connecting frame, and the connecting rod is inserted into the limiting insert hole.

[0015] The butterfly valve for online inspection and maintenance provided by this invention has the following beneficial effects: By configuring the maintenance components and coordinating the first shut-off valve, the branch pipe, and the second shut-off valve, the main flow path can be closed and the flow medium switched to the branch pipe during maintenance. This avoids the drawback of traditional maintenance requiring shutdown and flow interruption, fundamentally eliminating economic losses caused by production stoppages. Furthermore, by releasing the limiting position of the connecting support plate, the internal parts of the valve body can be inspected without disassembling multiple sets of flange bolts one by one. This not only shortens maintenance time but also avoids the risk of pipeline sealing failure caused by disassembling the connecting bolts between the valve body and the pipeline, ensuring the pipeline's sealing performance.

[0016] By designing the components separately, and through the matching structure of the connecting bracket and mating groove, and the engaging design of the locking block and locking slot, the valve plate and valve stem can be detachably connected. When the valve plate is damaged due to media erosion, corrosion, or wear, it is not necessary to replace the entire valve plate and valve stem assembly. Only the damaged valve plate needs to be disassembled and replaced separately. This significantly reduces the scrap rate of reusable parts, lowers the cost of spare parts procurement and replacement, and the convenient disassembly method allows for quick valve plate disassembly, shortening the valve plate replacement time and improving operational efficiency.

[0017] By configuring the filter components and the filter screen, impurities in the medium can be filtered out, preventing internal parts from getting stuck due to impurities. On the other hand, the flow rate of the medium as it passes through the filter screen can be reduced, thereby reducing the impact force of the medium on the valve plate. Moreover, the filter screen adopts an insert design, combined with a structure that automatically locks the medium pressure and unlocks it with a spring after the flow stops. This ensures that the filter screen is stable during operation and can be easily pulled out for cleaning after the medium stops, eliminating the need for complicated operations and improving maintenance efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 A schematic diagram of the overall structure according to the present invention is shown; Figure 2 A schematic diagram of the maintenance component structure according to the present invention is shown; Figure 3A schematic diagram of the structure of the first part of the maintenance assembly according to the present invention is shown; Figure 4 A schematic diagram of the moving screw and limiting ring structure in the maintenance assembly according to the present invention is shown; Figure 5 A schematic diagram of the structure of the second part of the maintenance assembly according to the present invention is shown; Figure 6 A schematic diagram of the split component structure according to the present invention is shown; Figure 7 A schematic diagram of the component structure of the split component according to the present invention is shown; Figure 8 A schematic diagram of the filter assembly structure according to the present invention is shown; Figure 9 A schematic diagram of the structure of some components in the filter assembly according to the present invention is shown; Figure 10 A schematic diagram of the connecting frame and filter screen structure in the filter assembly according to the present invention is shown; Figure label: 1. Valve body; 101. Front flange; 102. Rear flange; 2. Inspect components; 201. Notch; 2011. Extended convex plate; 2012. Moving groove; 2013. Cross slide groove; 2014. Locking shaft groove; 202. Snap-on collar; 2021. Connecting threaded ring; 203. Moving screw; 2031. Limiting cross bar; 2032. Limiting arc plate; 204. Connecting support plate; 2041. Through slot; 2042. Valve seat; 2043. Motor; 2044. Valve stem; 2045. Rotating support plate; 2046. Limiting vertical plate; 205. Limiting ring; 2051. Locking arc groove; 2052. Through groove; 206. First shut-off valve; 2061. Diversion branch pipe; 2062. Second shut-off valve; 3. Split components; 301. Connecting bracket; 3011. Movable groove; 3012. Isolation plate; 302. Fixed vertical rod; 3021. First spring; 303. Movable sliding plate; 3031. Limiting hole; 3032. Locking block; 3033. Sliding groove; 3034. Connecting T-plate; 304, valve plate; 3041, mating groove; 3042, locking slot; 4. Filter components; 401. Limiting strip; 4011. Connecting frame; 4012. Filter screen; 4013. Connecting top plate; 4014. Handle; 402. Fixed support frame; 4021. Guide groove; 4022. Fixed slide rod; 4023. Second spring; 403. Movable slider; 4031. Extending protrusion; 4032. Guide slide hole; 4033. Connecting protrusion; 4034. Connecting rod; 4035. Limiting hole. Detailed Implementation

[0021] Example 1: Please refer to Figures 1 to 10 : This invention proposes an online inspection and maintenance butterfly valve, comprising: valve body 1 and inspection and maintenance assembly 2; A front flange 101 and a rear flange 102 are fixedly connected to both ends of the valve body 1, and a maintenance assembly 2 is provided on the valve body 1. The maintenance assembly 2 comprises: Slot 201: It is opened at one end of the top of the valve body 1. Extended protrusions 2011 are fixedly connected to both sides of the valve body 1. A moving groove 2012 is opened on the extended protrusion 2011. A cross slide groove 2013 is opened on the outside of the moving groove 2012. A locking shaft groove 2014 is opened at the bottom of the extended protrusion 2011. Rotary collar 202: Rotatably installed in rotary shaft groove 2014, with a connecting screw ring 2021 fixedly connected to the bottom of rotary collar 202; Moving screw 203: It is located in the moving groove 2012. The outer side of the moving screw 203 is fixedly connected to the limiting cross bar 2031. The limiting cross bar 2031 is slidably installed in the cross groove 2013. The top end of the moving screw 203 is fixedly connected to the limiting arc plate 2032. Connecting support plate 204: Located at notch 201, the connecting support plate 204 has through slots 2041 on both sides of both ends. A valve seat 2042 is fixedly connected to the top of the connecting support plate 204. A motor 2043 is fixedly installed on the top of the valve seat 2042. The driving end of the motor 2043 is fixedly connected to the valve stem 2044 at the bottom. The bottom end of the valve stem 2044 is rotatably installed in the middle of the rotating support plate 2045. At the same time, the two ends of the rotating support plate 2045 are fixedly connected to limit vertical plates 2046. Limiting ring 205: Located on the top of the docking support plate 204, the limiting ring 205 has a locking arc groove 2051, and the limiting arc plate 2032 is fitted and snapped into the locking arc groove 2051. At the same time, the limiting ring 205 also has a through groove 2052 that intersects with the locking arc groove 2051. First shut-off valve 206: Located on front flange 101, and a branch pipe 2061 is fixedly connected between front flange 101 and rear flange 102, and a second shut-off valve 2062 is fixedly installed at one end of branch pipe 2061.

[0022] When online maintenance of the butterfly valve is required, first close the first shut-off valve 206 on the front flange 101 to block the main flow passage of the valve body 1; then open the second shut-off valve 2062 at one end of the branch pipe 2061 to allow the medium to be continuously transported through the branch pipe 2061, avoiding the drawback of traditional maintenance requiring shutdown and flow interruption, and fundamentally eliminating the economic losses caused by production stoppage due to shutdown. Then, turn the connecting threaded ring 2021 at the bottom of the retaining ring 202, and use its meshing characteristic with the internal thread of the moving screw 203 to drive the moving screw 203 to move. Since the limiting cross bar 2031 on the outer side of the moving screw 203 is slidably embedded in the cross groove 2013 of the extension convex plate 2011, it can play a precise limiting and guiding role for the moving screw 203, ensuring its stable movement along the moving groove 2012. As valve 203 moves, the limiting arc plate 2032 at its top gradually disengages from the locking arc groove 2051 of the limiting ring 205, releasing the fixation of the limiting ring 205. Then, the limiting ring 205 is rotated so that the through groove 2052 on the ring body aligns with the limiting arc plate 2032, allowing the limiting ring 205 to be removed. At this point, the connecting support plate 204 at the notch 201 is no longer constrained and can be directly removed, thereby exposing the internal structure of the valve body 1. This facilitates the inspection of internal components by maintenance personnel or the removal and replacement of faulty parts. It not only does not hinder normal operation but also eliminates the need to disassemble the butterfly valve for maintenance, greatly improving the maintenance efficiency of the butterfly valve. The setting of the limiting vertical plate 2046 not only increases the sealing performance of the valve plate 304 but also limits the rotation of the valve plate 304, preventing over-rotation and resulting in a poor seal.

[0023] Example 2: Based on Example 1, wherein, as Figure 6 and Figure 7 As shown, the valve stem 2044 is provided with splitting components 3 on both sides. The splitting components 3 include connecting brackets 301, movable grooves 3011 and isolation plates 3012. Connecting brackets 301 are fixedly connected to both sides of the valve stem 2044. Movable grooves 3011 are opened inside the connecting brackets 301. Isolation plates 3012 are fixedly connected to the middle of the movable grooves 3011.

[0024] A fixed vertical rod 302 is fixedly connected between the two sides of the isolation plate 3012 and the two ends of the movable groove 3011, and a first spring 3021 is provided on the outer side of the fixed vertical rod 302.

[0025] The movable slot 3011 has a movable slide plate 303 inside. The movable slide plate 303 has a limiting hole 3031. The movable slide plate 303 is slidably installed on the outside of the fixed vertical rod 302 through the limiting hole 3031. At the same time, a locking block 3032 is fixedly connected to one end of the outer side of the movable slide plate 303.

[0026] A sliding groove 3033 is provided on one side of the connecting bracket 301, and the movable slide plate 303 passes through the sliding groove 3033 and is fixedly connected to the outer connecting T plate 3034.

[0027] Valve plates 304 are provided on both sides of the connecting bracket 301. A mating groove 3041 is provided on the side of the valve plate 304 near the connecting bracket 301. Locking slots 3042 are provided at the upper and lower ends of the mating groove 3041. Locking blocks 3032 pass through the connecting bracket 301 and are fitted into the locking slots 3042.

[0028] When the valve plate 304 is damaged due to the medium, it is not necessary to replace both the valve plate 304 and the valve stem 2044. Simply pull the connecting T plate 3034 to move the movable slide plate 303. The movable slide plate 303 will then disengage the locking block 3032 from the locking slot 3042, allowing the damaged valve plate 304 to be disassembled and replaced individually, reducing the scrap rate of usable materials. During installation, simply snap the mating groove 3041 of the valve plate 304 onto both ends of the connecting protrusion 301, and then loosen the connecting T plate 3034. As the movable slide plate 303 moves, it compresses the first spring 3021 on the outside of the fixed vertical rod 302, causing the first spring 3021 to undergo elastic deformation. When the first spring 3021 loses pressure, it releases its elasticity, thereby pushing the movable slide plate 303 to move. The movable slide plate 303 will then move the locking block 3032 back into the locking slot 3042, thus completing the replacement.

[0029] Example 3: Based on Examples 1 and 2, wherein, as shown in Example 3... Figure 8 , Figure 9 and Figure 10 As shown, the valve body 1 is equipped with a filter assembly 4 inside. The filter assembly 4 includes a limiting insert 401, a connecting frame 4011, a filter screen 4012, a connecting top plate 4013, and a handle 4014. The limiting insert 401 is fixedly connected inside the valve body 1. The connecting frame 4011 is inserted between the limiting inserts 401. The filter screen 4012 is provided inside the connecting frame 4011. The connecting top plate 4013 is fixedly connected to the top of the connecting frame 4011. The handle 4014 is fixedly connected to the middle of the top of the connecting top plate 4013.

[0030] One end of the limiting insert 401 is fixedly connected to two sides of a fixed support frame 402. The upper and lower ends of the fixed support frame 402 are provided with guide grooves 4021. A fixed slide rod 4022 is fixedly connected inside the guide groove 4021. A second spring 4023 is provided on the outside of the fixed slide rod 4022.

[0031] A movable slider 403 is provided in the middle of the fixed support frame 402. The upper and lower ends of the movable slider 403 are fixedly connected with extension protrusions 4031. The extension protrusions 4031 are slidably installed on the fixed slider 4022 through the guide slide hole 4032.

[0032] A connecting protrusion 4033 is fixedly connected to one side of the movable slider 403, and a connecting rod 4034 is fixedly connected to one side of the movable slider 403 near the limiting insert 401. A limiting insert hole 4035 is opened in the middle of the connecting insert frame 4011, and the connecting rod 4034 is inserted into the limiting insert hole 4035.

[0033] The filter screen 4012 serves two purposes: firstly, it filters impurities in the medium, preventing internal parts from becoming stuck due to impurities; secondly, it reduces the subsequent flow rate of the medium as it passes through the filter screen 4012, thereby reducing the impact force of the medium on the valve plate 304. When cleaning the filter screen 4012 is required, simply grasp the handle 4014 to pull it out for cleaning. To ensure the stability of the filter screen 4012 during operation, the impact force during medium flow pushes the connecting convex plate 4033, causing the movable slider 403 to move. When the connecting rod 4034 is inserted into the limiting socket 4035, the filter screen 4012 cannot be pulled out by the handle 4014. When the medium stops, the moving slider 403 compresses the second spring 4023 on the outside of the fixed slider 4022 through the extending protrusion 4031, causing the second spring 4023 to become elastic. When the impact force is lost, the second spring 4023 generates a reaction force, thereby pushing the moving slider 403 to move. The moving slider 403 then drives the connecting rod 4034 to disengage from the limiting socket 4035, at which point the filter screen 4012 can be easily pulled out.

[0034] The specific usage and function of this embodiment are as follows: In this invention, when the butterfly valve is normally conveying the medium, it first enters the valve body 1 from the front flange 101. The medium then passes through the filter screen 4012 to intercept solid impurities mixed in the medium, preventing impurities from entering and causing parts to jam or wear. Simultaneously, as the medium passes through the filter screen 4012, the pore structure of the filter screen 4012 disperses the medium flow, reducing the impact of subsequent media on the valve plate 304 and extending the service life of the valve plate 304. When online maintenance is required, simply close the first shut-off valve 206 and then open the second shut-off valve 2062, allowing the medium to continue running through the branch pipe 2061, preventing transmission... This method avoids the drawback of requiring machine shutdown and flow interruption during maintenance, fundamentally eliminating the economic losses caused by production stoppages. Then, the connecting ring 2021 is tightened to engage with the moving screw 203 via its internal thread. The moving screw 203 is then guided and limited within the cross groove 2013 by the limiting cross bar 2031, causing it to move within the moving groove 2012. The moving screw 203 then disengages the limiting arc plate 2032 from the locking arc groove 2051, releasing the limiting ring 205. The limiting ring 205 is then rotated to align the through groove 2052 with the limiting arc plate 2032, allowing the limiting ring to be moved. After removing the positioning ring 205, the connecting support plate 204 can be removed, allowing for internal inspection of the valve body 1 and replacement of internal parts. This not only does not hinder normal operation but also eliminates the need to disassemble multiple sets of flange bolts one by one, shortening maintenance time. It also avoids the risk of pipeline seal failure caused by disassembling the connecting bolts between the valve body and the pipeline, ensuring pipeline sealing. When the valve plate 304 is damaged by the medium, it is not necessary to replace the entire valve plate 304 and valve stem 2044. Simply pull the connecting T-plate 3034 to move the movable slide plate 303, which in turn causes the locking block 3032 to disengage from the locking slot 304. 2. The damaged valve plate 304 can then be disassembled and replaced separately, reducing the scrap rate of usable materials. During installation, simply snap the mating groove 3041 of the valve plate 304 onto both ends of the connecting bracket 301, and then loosen the connecting T plate 3034. As the movable slide plate 303 moves, it compresses the first spring 3021 on the outside of the fixed vertical rod 302, causing the first spring 3021 to undergo elastic deformation. When the first spring 3021 loses pressure, it releases its elasticity, thereby pushing the movable slide plate 303 to move. The movable slide plate 303 then drives the locking block 3032 to reset and insert into the locking slot 3042, thus completing the replacement.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Detachable installation can take many forms, such as through a combination of plug-in and snap-fit ​​connections, or through bolted connections, etc.

[0036] The foregoing, in conjunction with the embodiments and accompanying drawings, has clearly and completely described the concept, specific structure, and technical effects of the present invention, so as to fully understand the purpose, features, and effects of the present invention.

[0037] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages mentioned herein do not refer solely to direct contact between components, but rather to the possibility of creating a better connection structure by adding or removing connecting accessories, depending on the specific implementation.

[0038] The above embodiments, which describe the specific features of the present invention, are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above description of the invention shall fall within the scope of protection of the present invention.

Claims

1. A butterfly valve for online inspection and maintenance, comprising: Valve body (1) and maintenance assembly (2); The valve body (1) is fixedly connected to a front flange (101) and a rear flange (102) at both ends, and the valve body (1) is provided with a maintenance assembly (2). The maintenance assembly (2) includes: Notch (201): It is opened at the top end of the valve body (1). Extended protrusions (2011) are fixedly connected to both sides of the valve body (1). A moving groove (2012) is opened on the extended protrusion (2011). A cross slide groove (2013) is opened on the outside of the moving groove (2012). A locking shaft groove (2014) is opened at the bottom of the extended protrusion (2011). Snap-in collar (202): Rotatably installed in snap-in groove (2014), with a connecting screw ring (2021) fixedly connected to the bottom of snap-in collar (202). Moving screw (203): It is located in the moving groove (2012). The outer side of the moving screw (203) is fixedly connected to the limiting cross bar (2031). The limiting cross bar (2031) is slidably installed in the cross groove (2013). The top end of the moving screw (203) is fixedly connected to the limiting arc plate (2032). Connecting support plate (204): Located at the notch (201), the connecting support plate (204) has through slots (2041) on both sides of both ends. A valve seat (2042) is fixedly connected to the top of the connecting support plate (204). A motor (2043) is fixedly installed on the top of the valve seat (2042). The driving end of the motor (2043) is fixedly connected to the valve stem (2044) at the bottom. The bottom end of the valve stem (2044) is rotatably installed in the middle of the rotating support plate (2045). At the same time, the two ends of the rotating support plate (2045) are fixedly connected to limit vertical plates (2046). Limiting ring (205): Located at the top of the docking support plate (204), the limiting ring (205) has a locking arc groove (2051), and the limiting arc plate (2032) is fitted and fastened in the locking arc groove (2051). At the same time, the limiting ring (205) also has a through groove (2052) that intersects with the locking arc groove (2051). First shut-off valve (206): It is installed on the front flange (101), and a branch pipe (2061) is fixedly connected between the front flange (101) and the rear flange (102). A second shut-off valve (2062) is fixedly installed at one end of the branch pipe (2061).

2. The butterfly valve for online inspection and maintenance according to claim 1, characterized in that: The valve stem (2044) is provided with a split assembly (3) on both sides. The split assembly (3) includes a connecting bracket (301), a movable groove (3011) and a partition plate (3012). The valve stem (2044) is fixedly connected to the connecting bracket (301) on both sides. The connecting bracket (301) is provided with a movable groove (3011) inside. The partition plate (3012) is fixedly connected to the middle of the movable groove (3011).

3. The butterfly valve for online inspection and maintenance according to claim 2, characterized in that: Fixed vertical rods (302) are fixedly connected between the two sides of the isolation plate (3012) and the two ends of the movable groove (3011), and a first spring (3021) is provided on the outside of the fixed vertical rods (302).

4. The butterfly valve for online inspection and maintenance according to claim 2, characterized in that: The movable slot (3011) is provided with a movable slide plate (303) inside. A limit hole (3031) is provided on the movable slide plate (303). The movable slide plate (303) is slidably installed on the outside of the fixed vertical rod (302) through the limit hole (3031). At the same time, a locking plug (3032) is fixedly connected to one end of the outer side of the movable slide plate (303).

5. The butterfly valve for online inspection and maintenance according to claim 2, characterized in that: A sliding groove (3033) is provided on one side of the connecting bracket (301), and the movable slide plate (303) passes through the sliding groove (3033) and is fixedly connected to the outer connecting T plate (3034).

6. The butterfly valve for online inspection and maintenance according to claim 2, characterized in that: The connecting bracket (301) has valve plates (304) on both sides. The valve plate (304) has a mating groove (3041) on the side near the connecting bracket (301). The upper and lower ends of the mating groove (3041) have locking slots (3042). The locking block (3032) passes through the connecting bracket (301) and is fitted into the locking slot (3042).

7. The butterfly valve for online inspection and maintenance according to claim 1, characterized in that: The valve body (1) is provided with a filter assembly (4) inside. The filter assembly (4) includes a limiting insert (401), a connecting frame (4011), a filter screen (4012), a connecting top plate (4013), and a handle (4014). The limiting insert (401) is fixedly connected inside the valve body (1). The connecting frame (4011) is inserted between the limiting inserts (401). The filter screen (4012) is provided inside the connecting frame (4011). The connecting top plate (4013) is fixedly connected to the top of the connecting frame (4011). The handle (4014) is fixedly connected to the middle of the top of the connecting top plate (4013).

8. The butterfly valve for online inspection and maintenance according to claim 7, characterized in that: The limiting insert (401) has a fixed support frame (402) fixedly connected to both sides of one end. The fixed support frame (402) has guide grooves (4021) at both ends. A fixed slide rod (4022) is fixedly connected inside the guide groove (4021). A second spring (4023) is provided on the outside of the fixed slide rod (4022).

9. A butterfly valve for online inspection and maintenance according to claim 8, characterized in that: The fixed support frame (402) is provided with a movable slider (403) in the middle. The upper and lower ends of the movable slider (403) are fixedly connected with extension protrusions (4031). The extension protrusions (4031) are slidably installed on the fixed slide rod (4022) through the guide slide hole (4032).

10. A butterfly valve for online inspection and maintenance according to claim 9, characterized in that: A connecting convex plate (4033) is fixedly connected to one side of the movable slider (403), and a connecting rod (4034) is fixedly connected to the side of the movable slider (403) near the limiting insert (401). A limiting insertion hole (4035) is opened in the middle of the connecting frame (4011), and the connecting rod (4034) is inserted into the limiting insertion hole (4035).

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