Bidirectional metal-to-metal triple eccentric butterfly valve

Abstract

The present invention relates to the technical field of butterfly valves, and discloses a bidirectional metal hard-to-hard three-eccentric butterfly valve, comprising a valve body, and also comprising: a control mechanism arranged on the top surface of the valve body; a valve stem arranged inside the valve body; a valve disc arranged on the outside of the valve stem; a sealing seat arranged on the outside of the valve body, wherein the control mechanism is used to control the rotation of the valve stem, the valve stem is used to drive the valve disc to rotate, the valve disc is used to seal the valve body, and the sealing seat is used to cooperate with the valve disc to seal the valve body; a connecting mechanism arranged on both sides of the top surface of the valve body, wherein the connecting mechanism is used to connect the equipment to the pipeline; and a filtering mechanism arranged inside the valve body, wherein the filtering mechanism is used to filter impurities in the liquid, which can improve the sealing performance of the valve, and also make the opening and closing torque smaller, and the operation more flexible and convenient. ‌Therefore, energy consumption is reduced, work efficiency is improved, and a strong guarantee is provided for the stable operation of the system.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valves, in particular to a bidirectional metal-on-hard triple-eccentric butterfly valve. Background Art

[0002] The butterfly valve is a control valve with an exquisite design and simple structure. Its core working principle is to easily open and close the valve by rotating a disc-shaped closing member, i.e., the valve disc, about ninety degrees around its own axis in the valve body. In the fluid pipeline system, the butterfly valve mainly plays an important role in cutting off the flow of fluid and regulating the flow of fluid.

[0003] During the use of existing butterfly valves, the valve stem will wear due to long-term contact with bearings, seals, etc. This wear or deformation will make the valve stem no longer fit tightly with the bearing during movement, thereby generating additional friction and resistance. These additional friction and resistance will not only increase the opening and closing torque, making the operation more laborious, but also increase the complexity of the operation and energy consumption.

[0004] To this end, the present invention provides a bidirectional metal-on-metal triple-eccentric butterfly valve. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The present invention provides a bidirectional metal-hard-on-hard three-eccentric butterfly valve, comprising a valve body, and also includes: a control mechanism arranged on the top surface of the valve body; a valve stem arranged inside the valve body; a valve disc arranged on the outside of the valve stem; a sealing seat arranged on the outside of the valve body, the control mechanism is used to control the rotation of the valve stem, the valve stem is used to drive the valve disc to rotate, the valve disc is used to seal the valve body, and the sealing seat is used to cooperate with the valve disc to seal the valve body; connecting mechanisms are arranged on both sides of the top surface of the valve body, the connecting mechanisms are used to connect the equipment to the pipeline; a filtering mechanism is arranged inside the valve body, the filtering mechanism is used to filter impurities in the liquid.

[0007] By adopting the above technical solution, the sealing performance of the valve can be improved, the opening and closing torque can be reduced, and the operation can be more flexible and convenient, thereby reducing energy consumption, improving work efficiency, and providing a strong guarantee for the stable operation of the system.

[0008] Preferably, the top of the valve stem is provided with a mounting groove 1, the inner wall of the mounting groove 1 is fixedly connected with teeth, the control mechanism comprises a sliding tube fixedly connected to the top surface of the valve body, the interior of the sliding tube is slidably connected with a rotating tube 1, the lower end of the rotating tube 1 is fixedly connected with a gear, the gear and the teeth are meshed with each other, the top of the rotating tube 1 is fixedly connected with a bevel gear 1, the outer side of the sliding tube is fixedly connected with a mounting tube, the interior of the mounting tube is rotatably connected with a rotating tube 2, the outer side of the rotating tube 2 is fixedly connected with a bevel gear 2, a fixing groove is provided at the connection between the sliding tube and the mounting tube, the bevel gear 1 and the bevel gear 2 are meshed with each other, one end of the rotating tube 2 passes through and is rotatably connected to the mounting tube, and one end of the rotating tube 2 passes through the mounting tube and is fixedly connected to a handwheel.

[0009] By adopting the above technical solution, it is ensured that when the gear rotates, the teeth will also rotate at the corresponding speed and direction. Finally, the rotation of the teeth is transmitted to the valve stem, causing the valve stem to start rotating, thereby achieving precise control of the entire valve system.

[0010] Preferably, the sealing seat comprises metal rings fixedly connected to both sides of the inner wall of the valve body.

[0011] Preferably, the connecting mechanism comprises mounting rings fixedly connected to both ends of the valve body, a connecting hole is formed on a side of the mounting ring away from the valve body, and the connecting hole passes through the mounting ring.

[0012] By adopting the above technical solution, the well-designed metal ring and the valve disc are tightly matched to ensure that the valve body is sealed firmly and reliably, effectively preventing any fluid leakage. At the same time, with the help of the preset connection holes on the mounting ring, the valve body can be conveniently and firmly connected to various pipeline systems, ensuring the integrity and efficient operation of the entire fluid control system.

[0013] Preferably, the filtering mechanism includes a fixing component and a filtering component, the fixing component includes an installation cavity opened on both sides of the valve body, a fixing ring 1 is fixedly connected to the lower side wall of the installation cavity, and a mounting groove 2 is opened inside the fixing ring 1.

[0014] Preferably, a fixing ring 2 is fixedly connected inside the mounting groove 2, a mounting groove 3 is opened on the inner wall of the fixing ring 2, flexible plates are fixedly connected on both sides of the fixing ring 2, one side of the flexible plate is fixedly connected to the inner wall of the fixing ring 1, and a reset spring 1 is fixedly connected to the outer side of the fixing ring 2.

[0015] Preferably, one end of the return spring is fixedly connected to the inner wall of the fixing ring 1, a sliding groove is provided at the top of the fixing ring 1, and a filter assembly is slidably connected to the upper end of the sliding groove.

[0016] Preferably, the filter assembly includes a filter plate inserted into the second mounting groove, the top end of the filter plate is slidably connected to a fixing ring three, and the side of the filter plate facing the first reset spring is fixedly connected to a reset spring three.

[0017] Preferably, the other end of the reset spring three is fixedly connected to the fixing ring three, the lower end of the fixing ring three is fixedly connected with a fixing block, the fixing block is located inside the sliding groove, and a connecting groove is provided on the side of the fixing block away from the sliding groove.

[0018] Preferably, the connecting groove passes through the fixing ring 1, the inner wall of the connecting groove is fixedly connected with the reset spring 2, the inner wall of the connecting groove is located inside the reset spring 2 and is fixedly connected with a telescopic column, and the outer side of the telescopic column is fixedly connected with the mounting block.

[0019] By adopting the above technical solution, not only can the clogging of the filter plate by dust be effectively avoided, but also the continuous stability of the filtering effect can be ensured. Through regular vibration cleaning, the service life of the filter plate can be extended and the operating efficiency of the entire filtering system can be improved.

[0020] The bidirectional metal-hard-to-hard three-eccentric butterfly valve described in the present invention achieves a stable and reliable connection through the connecting mechanism when connecting the valve body and the pipeline, and the valve body and the pipeline are tightly combined, which provides a solid foundation for subsequent fluid control. Next, the filtering mechanism can effectively remove various impurities in the liquid to ensure the purity of the fluid and the normal operation of the system. In the structural design of the valve, three eccentric points are set. The first eccentric point is located between the center line of the valve stem and the rotation axis of the valve disc. The offset between the center of the valve stem and the rotation axis of the valve disc causes the valve disc to contact the sealing surface at an oblique angle when opening and closing, rather than completely vertically contacting the sealing surface. This reduces the friction when the valve disc contacts the sealing seat, reduces the wear of the sealing surface, and makes the valve smoother when opening. The second eccentric point is located between the rotation center of the valve disc and the sealing seat. The center point of the valve disc deviates from the center of the sealing seat, resulting in the contact surface between the valve disc and the sealing seat is not fully sealed when closing, but gradually contacting, starting from one side of the valve disc and gradually advancing to the opposite side. This eccentric design makes the sealing pressure distribution more uniform, reduces the initial impact force of the sealing surface contact, optimizes the sealing effect, and reduces wear. The third eccentric point is located at the center of the contact surface between the inner wall of the sealing seat and the valve disc. The center of contact between the sealing seat and the valve disc is offset, so that when the valve disc is closed, the contact between the sealing seat and the valve disc occurs gradually, starting from one side and evenly distributing the pressure, avoiding the uneven distribution of sealing pressure when the valve is closed. This eccentric design reduces the operating force, improves the sealing performance, and extends the service life of the valve. This design not only improves the sealing performance of the valve, but also makes the opening and closing torque smaller, and the operation is more flexible and convenient, thereby reducing energy consumption, improving work efficiency, and providing a strong guarantee for the stable operation of the system.

[0021] The bidirectional metal hard-on-hard three-eccentric butterfly valve described in the present invention is to install the filter plate by first inserting it into the installation groove three in the fixing ring two. This step is the starting point of the installation process to ensure that the filter plate can be accurately positioned at the predetermined position. Next, by pressing the installation block and utilizing the telescopic characteristics of the return spring two, the installation block is extended into the connecting groove. The realization of this action depends on the elastic deformation ability of the return spring two, which allows the installation block to be displaced when subjected to pressure, thereby being tightly combined with the connecting groove. Subsequently, the fixing block is inserted into the sliding groove, and the telescopic characteristics of the return spring two are utilized again to push the installation block to move. In this process In the process, the telescopic column plays a key guiding role, which ensures the stability and smoothness of the mounting block during the movement and prevents installation errors caused by shaking or offset. Finally, the mounting block is successfully moved into the fixing ring one, realizing the fixed connection between the fixing ring one and the fixing ring three. The completion of this step marks the basic completion of the installation of the filter assembly. At this time, the filter assembly has been firmly installed in the predetermined position, ready for subsequent filtering work. When the filter assembly needs to be repaired or replaced, the filter plate can be easily removed from the fixing ring two by simply reversing the operation. This design not only improves the maintenance efficiency, but also reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a stereogram of an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure inside the valve body of the present invention; Figure 3 is a schematic side view of the structure of an embodiment of the present invention; Figure 4 It is a schematic diagram of a half-section structure of a sliding tube and a mounting tube of the present invention; Figure 5 It is a schematic diagram of the control mechanism of the present invention; Figure 6 yes Figure 5 A partial enlarged view of the middle part; Figure 7 It is a schematic diagram of the structure of the fixing assembly of the present invention; Figure 8 is a schematic diagram of the structure of the filter assembly of the present invention; Fig. 9 It is a schematic diagram of the structure of the valve flap of the present invention when it is sealed.

[0023] Description of reference numerals: 1. Valve body; 2. Control mechanism; 21. Sliding tube; 22. Rotating tube 1; 23. Gear; 24. Bevel gear 1; 25. Mounting tube; 26. Rotating tube 2; 27. Bevel gear 2; 28. Fixed groove; 29. ​​Hand wheel; 3. Valve stem; 31. Mounting groove 1; 32. Tooth; 4. Valve disc; 5. Sealing seat; 51. Metal ring; 6. Connecting mechanism; 61. Mounting ring; 62. Connecting hole; 7. Filter mechanism; 71. Fixed assembly Parts; 711, installation cavity; 712, fixing ring one; 713, installation slot two; 714, installation slot three; 715, reset spring one; 716, sliding slot; 717, flexible plate; 718, fixing ring two; 72, filter assembly; 721, filter plate; 722, fixing ring three; 723, fixing block; 724, connecting slot; 725, reset spring two; 726, telescopic column; 727, installation block; 728, reset spring three. DETAILED DESCRIPTION

[0024] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0025] Example: The following is a further detailed description of the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments. Figures 1 to 9 , please refer to the bidirectional metal hard-to-hard three-eccentric butterfly valve provided in this application Figure 1 , Figure 2 and Fig. 9 , including a valve body 1, and also including: a control mechanism 2 arranged on the top surface of the valve body 1; a valve stem 3 arranged inside the valve body 1; a valve disc 4 arranged on the outside of the valve stem 3; a sealing seat 5 arranged on the outside of the valve body 1, the control mechanism 2 is used to control the rotation of the valve stem 3, the valve stem 3 is used to drive the valve disc 4 to rotate, the valve disc 4 is used to seal the valve body 1, and the sealing seat 5 is used to cooperate with the valve disc 4 to seal the valve body 1; connecting mechanisms 6 are arranged on both sides of the top surface of the valve body 1, and the connecting mechanism 6 is used to connect the equipment to the pipeline; a filtering mechanism 7 is arranged inside the valve body 1, and the filtering mechanism 7 is used to filter impurities in the liquid.

[0026] Specifically, when connecting the valve body 1 and the pipeline, firstly, a stable and reliable connection is achieved through the connecting mechanism 6, and the valve body 1 and the pipeline are tightly combined, which provides a solid foundation for the subsequent fluid control. Next, the filtering mechanism 7 can effectively remove various impurities in the liquid to ensure the purity of the fluid and the normal operation of the system. In the structural design of the valve, three eccentric points are set. The first eccentric point is located between the center line of the valve stem 3 and the rotation axis of the valve disc 4. The offset between the center of the valve stem 3 and the rotation axis of the valve disc 4 causes the valve disc 4 to contact the sealing surface at an oblique angle when opening and closing, instead of contacting the sealing surface completely vertically. In this way, the friction between the valve disc 4 and the sealing seat 5 is reduced, the wear of the sealing surface is reduced, and the valve opening is smooth. It is smoother when opening. The second eccentric point is located between the rotation center of the valve disc 4 and the sealing seat 5. The center point of the valve disc 4 deviates from the center of the sealing seat 5, resulting in that the contact surface between the valve disc 4 and the sealing seat 5 is not fully sealed when closing, but gradually contacts, starting from one side of the valve disc 4 and gradually advancing to the opposite side. This eccentric design makes the sealing pressure distribution more uniform, reduces the impact force of the initial contact of the sealing surface, optimizes the sealing effect, and reduces wear. The third eccentric point is located at the center of the contact surface between the inner wall of the sealing seat 5 and the valve disc 4. The center of the contact between the sealing seat 5 and the valve disc 4 is offset, so that when the valve disc 4 is closed, the contact between the sealing seat 5 and the valve disc 4 gradually occurs, starting from one side and evenly distributing the pressure, avoiding the uneven distribution of the sealing pressure when the valve is closed. This eccentric design reduces the operating force, improves the sealing performance, and prolongs the service life of the valve. This design not only improves the sealing performance of the valve, but also makes the opening and closing torque smaller, and the operation is more flexible and convenient, thereby reducing energy consumption, improving work efficiency, and providing a strong guarantee for the stable operation of the system.

[0027] Please refer to Figure 4 , Figure 5 and Figure 6 A mounting groove 31 is provided at the top of the valve stem 3, and teeth 32 are fixedly connected to the inner wall of the mounting groove 31. The control mechanism 2 includes a sliding tube 21 fixedly connected to the top surface of the valve body 1, a rotating tube 22 is slidably connected inside the sliding tube 21, a gear 23 is fixedly connected to the lower end of the rotating tube 22, the gear 23 and the teeth 32 are meshed with each other, a bevel gear 24 is fixedly connected to the top of the rotating tube 22, a mounting tube 25 is fixedly connected to the outside of the sliding tube 21, a rotating tube 26 is rotatably connected inside the mounting tube 25, and a bevel gear 27 is fixedly connected to the outside of the rotating tube 26, a fixing groove 28 is provided at the connection between the sliding tube 21 and the mounting tube 25, the bevel gear 1 24 and the bevel gear 27 are meshed with each other, one end of the rotating tube 26 passes through and is rotatably connected to the mounting tube 25, and one end of the rotating tube 26 passing through the mounting tube 25 is fixedly connected to a hand wheel 29.

[0028] Specifically, by rotating the hand wheel 29 clockwise or counterclockwise, the rotational torque generated by the hand wheel 29 will be transmitted to the rotating tube 26 closely connected thereto, causing the rotating tube 26 to start rotating. As the rotating tube 26 rotates, the bevel gear 27 on its outer side rotates accordingly. The bevel gear 27 maintains a precise meshing relationship with the bevel gear 1 24, so when the bevel gear 27 rotates, it drives the bevel gear 1 24 to rotate in the same direction of rotation. The rotation of the bevel gear 1 24 is transmitted to the rotating tube 1 22 connected thereto, causing the rotating tube 1 22 to also start rotating around its axis. The rotation of the rotating tube 1 22 drives the gear 23, which is tightly meshed with the teeth 32 in the mounting groove 1 31. This meshing relationship ensures that when the gear 23 rotates, the teeth 32 will also rotate at the corresponding speed and direction. Finally, the rotation of the teeth 32 is transmitted to the valve stem 3, causing the valve stem 3 to start rotating, thereby achieving precise control of the entire valve system.

[0029] Please refer to Figure 2 and Figure 3 The sealing seat 5 includes metal rings 51 fixedly connected to both sides of the inner wall of the valve body 1, and the connecting mechanism 6 includes mounting rings 61 fixedly connected to both ends of the valve body 1. A connecting hole 62 is opened on the side of the mounting ring 61 away from the valve body 1, and the connecting hole 62 passes through the mounting ring 61.

[0030] Specifically, since the metal ring 51 is designed as a semicircular arc, the contact between the metal ring 51 and the valve disc 4 occurs gradually, starting from one side and evenly distributing the pressure, which can ensure that the valve is sealed firmly and reliably, effectively preventing any fluid leakage. At the same time, with the help of the preset connection hole 62 on the mounting ring 61, the valve body 1 can be conveniently and firmly connected to various pipeline systems, ensuring the integrity and efficient operation of the entire fluid control system.

[0031] Please refer to Figure 7 and Figure 8The filter mechanism 7 includes a fixing assembly 71 and a filter assembly 72. The fixing assembly 71 includes an installation cavity 711 opened on both sides of the valve body 1. The lower side wall of the installation cavity 711 is fixedly connected with a fixing ring 1 712. The interior of the fixing ring 1 712 is provided with a mounting groove 2 713. The interior of the mounting groove 2 713 is fixedly connected with a fixing ring 2 718. The inner wall of the fixing ring 2 718 is provided with a mounting groove 3 714. Both sides of the fixing ring 2 718 are fixedly connected with flexible plates 717. One side of the flexible plate 717 is fixedly connected to the inner wall of the fixing ring 1 712. The outer side of the fixing ring 2 718 is fixedly connected with a return spring 1 715. One end of the return spring 1 715 is fixedly connected to the inner wall of the fixing ring 1 712. The top of the fixing ring 1 712 is provided with a sliding groove 716. The upper end of the sliding groove 716 is slidably connected with the filter assembly 7 2. The filter assembly 72 includes a filter plate 721 inserted into the second mounting groove 713, the top of the filter plate 721 is slidably connected with a fixing ring 3 722, the side of the filter plate 721 facing the return spring 1 715 is fixedly connected with a return spring 3 728, the other end of the return spring 3 728 is fixedly connected to the fixing ring 3 722, the lower end of the fixing ring 3 722 is fixedly connected with a fixing block 723, the fixing block 723 is located inside the sliding groove 716, a connecting groove 724 is provided on the side of the fixing block 723 away from the sliding groove 716, the connecting groove 724 runs through the fixing ring 1 712, the inner wall of the connecting groove 724 is fixedly connected with the second return spring 725, the inner wall of the connecting groove 724 is located on the inner side of the return spring 2 725 and is fixedly connected with a telescopic column 726, and the outer side of the telescopic column 726 is fixedly connected to the mounting block 727.

[0032] Specifically, when installing the filter plate 721, it is first inserted into the installation groove 3 714 in the fixing ring 2 718. This step is the starting point of the installation process to ensure that the filter plate 721 can be accurately positioned at the predetermined position. Next, by pressing the installation block 727 and utilizing the telescopic characteristics of the return spring 2 725, the installation block 727 is extended into the connecting groove 724. The realization of this action depends on the elastic deformation ability of the return spring 2 725, which allows the installation block 727 to be displaced when subjected to pressure, thereby tightly combining with the connecting groove 724. Subsequently, the fixing block 723 is inserted into the fixing ring 718. After the cam 727 is in the state of being moved to the sliding groove 716, the expansion and contraction of the return spring 2 725 is used again to push the mounting block 727 to move. In this process, the expansion column 726 plays a key guiding role, which ensures the stability and stability of the mounting block 727 during the movement, and prevents installation errors caused by shaking or deviation. Finally, the mounting block 727 is successfully moved into the fixing ring 1 712, and the inner rings of the fixing ring 1 712 and the fixing ring 3 722 are both provided with rubber sealing rings to ensure that the moisture in the valve body 1 will not leak out, thereby realizing the fixed connection between the fixing ring 1 712 and the fixing ring 3 722. The completion of this step is marked. This indicates that the installation of the filter assembly 72 is basically completed. At this time, the filter assembly 72 has been firmly installed in the predetermined position, and is ready for subsequent filtering work. When the filter assembly 72 needs to be repaired or replaced, the filter plate 721 can be easily removed from the fixing ring 718 by simply performing a reverse operation. This design not only improves the maintenance efficiency, but also reduces the maintenance cost. In addition, when the valve flap 4 rotates to open the valve body 1, it will push the filter plate 721 to move; and when the valve flap 4 rotates to close the valve body 1, it will be separated from the filter plate 721. The realization of this action depends on the valve flap 4 and the filter plate 721. Due to the interaction force between the two, the filter plate 721 can be displaced under the push of the valve disc 4, thereby realizing the filtering function; when the valve disc 4 is detached, the filter plate 721 remains stationary, waiting for the next filtering task. Finally, the reset spring 1 715 will drive the fixing ring 2 718 to move, so that the filter plate 721 vibrates, thereby shaking off the dust attached to the filter plate 721. This design not only effectively avoids the clogging of the filter plate 721 by dust, but also ensures the continuous and stable filtering effect. Through regular vibration cleaning, the service life of the filter plate 721 can be extended and the operating efficiency of the entire filtering system can be improved.

[0033] Working principle: When connecting the valve body 1 to the pipeline, the valve body 1 can be conveniently and firmly connected to various pipeline systems by means of the connection hole 62 preset on the mounting ring 61, ensuring the integrity and efficient operation of the entire fluid control system. By rotating the hand wheel 29 clockwise or counterclockwise, the rotation torque generated by the hand wheel 29 will be transmitted to the rotating tube 26 closely connected to it, prompting the rotating tube 26 to start rotating. As the rotating tube 26 rotates, the bevel gear 27 on its outer side rotates accordingly. The bevel gear 27 maintains a precise meshing relationship with the bevel gear 1 24, so when the bevel gear 27 rotates, it drives the bevel gear 1 24 to rotate in the same direction of rotation. The rotation of the bevel gear 1 24 is transmitted to the rotating tube 1 22 connected thereto, causing the rotating tube 1 22 to also start rotating around its axis. The rotation of the rotating tube 1 22 drives the gear 23, and the gear 23 is closely meshed with the teeth 32 in the mounting groove 1 31. This meshing relationship ensures that when the gear 23 rotates, the teeth 32 will also rotate at a corresponding speed and direction.Finally, the rotation of the teeth 32 is transmitted to the valve stem 3, so that the valve stem 3 starts to rotate, and then drives the valve disc 4 to rotate. The close fit between the metal ring 51 with a semicircular arc design in the sealing seat 5 and the valve disc 4 can ensure that the valve body 1 is sealed firmly and reliably, thereby achieving precise control of the entire valve system. When installing the filter plate 721, it must first be inserted into the installation groove 3 714 in the fixing ring 2 718. This step is the starting point of the installation process to ensure that the filter plate 721 can be accurately positioned at the predetermined position. Next, by pressing the installation block 727 and utilizing the telescopic characteristics of the return spring 2 725, the installation block 727 is The mounting block 727 is inserted into the connecting groove 724. The realization of this action depends on the elastic deformation ability of the second return spring 725, which allows the mounting block 727 to be displaced when under pressure, so as to be tightly combined with the connecting groove 724. Subsequently, the fixing block 723 is inserted into the sliding groove 716, and the expansion and contraction of the second return spring 725 is used again to push the mounting block 727 to move. In this process, the telescopic column 726 plays a key guiding role. It ensures the stability and stability of the mounting block 727 during the movement, and prevents installation errors caused by shaking or offset. Finally, the mounting block 727 is successfully moved into the fixing ring 1 712, and the fixation is achieved. The fixed connection between the ring 1 712 and the fixing ring 3 722. The completion of this step indicates that the installation work of the filter assembly 72 is basically completed. At this time, the filter assembly 72 has been firmly installed in the predetermined position, and is ready for subsequent filtering work. When the filter assembly 72 needs to be repaired or replaced, the filter plate 721 can be easily removed from the fixing ring 2 718 by simply performing a reverse operation. This design not only improves the maintenance efficiency, but also reduces the maintenance cost. In addition, when the valve disc 4 rotates to open the valve body 1, it will push the filter plate 721 to move; and when the valve disc 4 rotates to close the valve body 1, it will be separated from the filter plate 721. The realization of this action is Relying on the interaction force between the valve flap 4 and the filter plate 721, the filter plate 721 can be displaced under the push of the valve flap 4, thereby realizing the filtering function; when the valve flap 4 is detached, the filter plate 721 remains stationary, waiting for the next filtering task. Finally, the reset spring 1 715 will drive the fixing ring 2 718 to move, causing the filter plate 721 to vibrate, thereby shaking off the dust attached to the filter plate 721. This design not only effectively avoids the clogging of the filter plate 721 by dust, but also ensures the continuous and stable filtering effect. Through regular vibration cleaning, the service life of the filter plate 721 can be extended and the operating efficiency of the entire filtering system can be improved.

[0034] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A bidirectional metal-on-metal triple-eccentric butterfly valve, comprising a valve body (1); characterized in that: Also includes; A control mechanism (2) disposed on the top surface of the valve body (1); A valve stem (3) disposed inside the valve body (1); A valve flap (4) arranged on the outside of the valve stem (3); a sealing seat (5) arranged on the outside of the valve body (1), the control mechanism (2) being used to control the rotation of the valve stem (3), the valve stem (3) being used to drive the valve flap (4) to rotate, the valve flap (4) being used to seal the valve body (1), and the sealing seat (5) being used to cooperate with the valve flap (4) to seal the valve body (1); Connecting mechanisms (6) are arranged on both sides of the top surface of the valve body (1), and the connecting mechanisms (6) are used to connect the device to the pipeline; A filtering mechanism (7) disposed inside the valve body (1), the filtering mechanism (7) being used to filter impurities in the liquid; The filtering mechanism (7) comprises a fixing assembly (71) and a filtering assembly (72); the fixing assembly (71) comprises a mounting cavity (711) provided on both sides of the valve body (1); a fixing ring 1 (712) is fixedly connected to the lower side wall of the mounting cavity (711); a mounting groove 2 (713) is provided inside the fixing ring 1 (712).

2. The bidirectional metal-on-metal triple-eccentric butterfly valve according to claim 1 is characterized in that: The top end of the valve stem (3) is provided with a mounting groove (31), and the inner wall of the mounting groove (31) is fixedly connected with teeth (32). The control mechanism (2) comprises a sliding tube (21) fixedly connected to the top surface of the valve body (1), the interior of the sliding tube (21) is slidably connected with a rotating tube (22), the lower end of the rotating tube (22) is fixedly connected with a gear (23), the gear (23) and the teeth (32) are meshed with each other, the top end of the rotating tube (22) is fixedly connected with a bevel gear (24), and the sliding tube (21) is fixedly connected with a rotating tube (22). The outer side of the sliding tube (21) is fixedly connected to a mounting tube (25), the interior of the mounting tube (25) is rotatably connected to a rotating tube 2 (26), the outer side of the rotating tube 2 (26) is fixedly connected to a bevel gear 2 (27), a fixing groove (28) is provided at the connection between the sliding tube (21) and the mounting tube (25), the bevel gear 1 (24) and the bevel gear 2 (27) are meshed with each other, one end of the rotating tube 2 (26) passes through and is rotatably connected to the mounting tube (25), and one end of the rotating tube 2 (26) passing through the mounting tube (25) is fixedly connected to a hand wheel (29).

3. The bidirectional metal-on-metal triple-eccentric butterfly valve according to claim 1 is characterized in that: The sealing seat (5) comprises metal rings (51) fixedly connected to two sides of the inner wall of the valve body (1).

4. The bidirectional metal-on-metal triple-eccentric butterfly valve according to claim 1 is characterized in that: The connection mechanism (6) comprises a mounting ring (61) fixedly connected to both ends of the valve body (1), a connecting hole (62) being formed on a side of the mounting ring (61) away from the valve body (1), and the connecting hole (62) passes through the mounting ring (61).

5. The bidirectional metal-on-metal triple-eccentric butterfly valve according to claim 4 is characterized in that: A second fixing ring (718) is fixedly connected inside the second mounting groove (713), a third mounting groove (714) is provided on the inner wall of the second fixing ring (718), flexible plates (717) are fixedly connected on both sides of the second fixing ring (718), one side of the flexible plate (717) is fixedly connected to the inner wall of the first fixing ring (712), and a return spring (715) is fixedly connected on the outer side of the second fixing ring (718).

6. The bidirectional metal-on-metal triple-eccentric butterfly valve according to claim 5, characterized in that: One end of the return spring 1 (715) is fixedly connected to the inner wall of the fixing ring 1 (712); a sliding groove (716) is provided at the top of the fixing ring 1 (712); and a filter assembly (72) is slidably connected to the upper end of the sliding groove (716).

7. The bidirectional metal-on-metal triple-eccentric butterfly valve according to claim 6, characterized in that: The filter assembly (72) comprises a filter plate (721) inserted into the interior of the second mounting groove (713); a fixing ring (722) is slidably connected to the top of the filter plate (721); and a reset spring (728) is fixedly connected to the side of the filter plate (721) facing the first reset spring (715).

8. The bidirectional metal-on-metal triple-eccentric butterfly valve according to claim 7, characterized in that: The other end of the return spring three (728) is fixedly connected to the fixing ring three (722), and the lower end of the fixing ring three (722) is fixedly connected with a fixing block (723), and the fixing block (723) is located inside the sliding groove (716). A connecting groove (724) is provided on a side of the fixing block (723) away from the sliding groove (716).

9. The bidirectional metal-on-metal triple-eccentric butterfly valve according to claim 8, characterized in that: The connecting groove (724) passes through the fixing ring 1 (712); the inner wall of the connecting groove (724) is fixedly connected to the reset spring 2 (725); the inner wall of the connecting groove (724) is located inside the reset spring 2 (725) and is fixedly connected to a telescopic column (726); the outer side of the telescopic column (726) is fixedly connected to the mounting block (727).

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