Hydraulically actuated flat gate valve

Abstract

The application discloses a hydraulic driving flat gate valve and relates to the technical field of flat gate valves. The hydraulic driving flat gate valve comprises a fixed pipe, the fixed pipe is fixedly connected to the outer side of a valve body, an inner cavity is formed in the inside of the fixed pipe, a filter screen is fixedly connected to the inner wall of the inner cavity far from the valve body, a rotating shaft is rotatably connected to the middle part of the filter screen, the rotating shaft penetrates through the filter screen, an impeller is fixedly connected to the outer side of the rotating shaft close to the valve body, a cleaning plate is fixedly connected to the end of the rotating shaft far from the impeller, a fixing rod is fixedly connected to the outer side of the rotating shaft, and a scraper is fixedly connected to the end of the fixing rod far from the rotating shaft. The hydraulic driving flat gate valve is characterized in that the rotating shaft drives the cleaning plate and the scraper to rotate, so that the cleaning plate cleans the outer side of the filter screen, the filter screen is prevented from being blocked, the scraper cleans the inside of the inner cavity, impurities are prevented from being accumulated in the pipeline, pipeline blockage and equipment failure are avoided, and the stable and reliable operation of the whole fluid conveying system is ensured.

Description

Technical Field

[0001] This invention relates to the field of flat gate valve technology, specifically a hydraulically driven flat gate valve. Background Technology

[0002] Gate valves are among the most commonly used shut-off valves, primarily used to connect or disconnect the medium in a pipeline to regulate the flow rate. Due to their wide range of operating pressures, temperatures, and diameters, gate valves are widely used in many fields. The main components of a gate valve include the valve seat, valve stem, and valve plate. The valve seat has a sealing ring on its inner side, which abuts against the end face of the valve plate to seal and thus block fluid flow. Flat gate valves are a common type of valve. The valve plate of a flat gate valve is flat and fits against the sealing surface of the valve seat to achieve the function of cutting off or connecting the fluid. This flat valve plate structure makes the movement of the valve plate relatively smooth during opening and closing.

[0003] When existing flat gate valves are in use, the medium often contains some impurities. When these impurities enter the valve, they can easily cause blockages inside the valve and damage its internal structure, affecting its performance and lifespan. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a hydraulically driven flat gate valve, comprising a valve body, a valve cover fixedly connected to the top of the valve body, a protective cylinder fixedly connected to the top of the valve cover, and a hydraulic cylinder fixedly connected to the top of the protective cylinder.

[0005] A connecting assembly is fixedly connected to the output end of the hydraulic cylinder. The connecting assembly is located inside the protective cylinder. A valve stem is fixedly connected to the end of the connecting assembly away from the hydraulic cylinder. The valve stem passes through the valve cover and extends into the interior of the valve body. The valve stem is located at the center of the protective cylinder.

[0006] The valve plate is fixedly installed at the end of the valve stem away from the connecting assembly, and the valve plate is located inside the valve body.

[0007] The fittings are fixedly installed on the outside of the valve body. There are two fittings, which are symmetrically arranged with the valve body as the center.

[0008] The fittings include a fixed pipe, which is fixedly connected to the outside of the valve body. The fixed pipe has an inner cavity that is tapered, with its diameter gradually decreasing towards the valve body. This gradual decrease in diameter causes the fluid velocity within the cavity to increase slowly. This relatively high velocity reduces the sedimentation and accumulation of impurities in the fluid, keeping the pipe clean and reducing the possibility of blockage. Simultaneously, the tapered shape allows the fluid to gradually contract within the cavity, adjusting the flow direction and velocity distribution of the medium. This allows the fluid to approach the valve plate more smoothly, effectively reducing direct impact and turbulence on the valve plate, decreasing erosion and wear on the valve plate's sealing surface, extending the service life of the valve plate and the entire valve, and improving the valve's sealing performance and reliability. A filter screen is fixedly connected to the inner wall of the cavity at the end furthest from the valve body. A rotating shaft is rotatably connected to the center of the filter screen, passing through it. An impeller is fixedly connected to the outer side of the valve body. A cleaning plate is fixedly connected to the end of the shaft away from the impeller. There are multiple cleaning plates, evenly distributed around the shaft. A fixing rod is fixedly connected to the outer side of the shaft. A scraper is fixedly connected to the end of the fixing rod away from the shaft. A water source is connected to the fixed pipe. Water enters the interior of the fixed pipe and passes through the filter screen, thus filtering impurities in the water. This prevents internal components from being worn, scratched, or blocked, ensuring the valve's sealing performance and normal opening and closing function, and extending the valve's service life. The water flow drives the impeller to rotate, which in turn drives the shaft to rotate. The shaft drives the cleaning plates and scraper to rotate, thus the cleaning plates clean the outer side of the filter screen to prevent clogging. At the same time, the scraper cleans the interior of the cavity to prevent impurities from accumulating in the pipe, causing pipe blockage and equipment failure. This ensures the stable and reliable operation of the entire fluid transport system. The outer side of the scraper contacts the interior cavity, and the impeller is located at the interval between the fixing rod and the filter screen.

[0009] Preferably, the valve plate includes a fixed block, which is fixedly connected to the bottom of the valve stem. Side plates are slidably connected to the outer side of the fixed block. There are two side plates, symmetrically arranged around the fixed block, with their middle sections contacting each other. A through hole is formed at the end of each side plate away from the fixed block, penetrating both sides of the fixed block. A compression spring is fixedly connected to the side plate closest to the fixed block. When the valve is in the open state, the hydraulic cylinder is powered by an external power source. The output end of the hydraulic cylinder drives the valve stem downwards via a connecting assembly. The valve stem drives the fixed block downwards, which in turn drives the side plates downwards, causing the through holes on the outer sides of the side plates to move away from the circular holes. As the side plates continue to move downwards... The movement causes the bottom retaining ring to contact and compress with the protrusion inside the housing. The return spring is stretched, causing the retaining ring to slide on the side plates away from the protrusion. At this point, the side plates are in close contact with the inner walls of the housing, and the ring is located inside the inclined side of the circular hole. The ring is compressed and deformed, filling the gap between the valve plate and the valve body, preventing media leakage and ensuring good sealing performance of the valve. This prevents fluid from seeping out from the edge of the valve plate when the valve is closed. This is crucial for preventing media leakage, avoiding environmental pollution, and ensuring the normal operation of the system. The two ends of the compression spring are fixedly connected to the side plates on both sides, with the side plates closer to the fixed block... A baffle is fixedly connected to the side, with a gap between the baffles on both sides of the fixing block. A fixing ring is fixedly connected to the outer side of the side plate near the through hole, with the fixing ring inclined on the side away from the side plate. A cylinder is fixedly connected to the outer side of the side plate, and a sleeve is fitted onto the outer side of the cylinder. The sleeve and cylinder help enhance the stability of the valve plate during movement, especially under the action of high pressure and high speed fluids, reducing the vibration and shaking of the valve plate, making the valve operation smoother and more reliable. The sleeve and cylinder are slidably connected, and the sleeve is fixedly connected to the side plate. The sleeve and cylinder are respectively connected to the side plates on both sides. A return spring is fixedly connected to the outer side of the side plate. The return spring and compression spring, when the valve is closed, allow the elastic element to cause a slight deformation of the two side plates, thereby compensating for the deviation of the sealing surface angle caused during the processing, so that the valve plate and valve body can fit better and improve the sealing performance. At the same time, the elastic element can alleviate the impact force between the valve plate and valve body when the valve is closed, reduce wear and noise, and also help protect the structural components of the valve and extend the service life of the valve. The return spring is located at the interval between the fixed ring and the sleeve. A groove is opened on the side plate away from the fixed block. The groove is located inside the return spring. A ring is fixedly connected to the outside of the side plate near the groove. The ring is elastic and is sleeved on the outside of the groove.

[0010] Preferably, the valve body includes a housing, with a protrusion fixedly connected to the bottom of the inner wall of the housing. The protrusion is trapezoidal, and the inclination direction of the side of the protrusion is parallel to the inclination direction of the fixing ring. A circular hole is opened on the outer side of the housing, and the axis of the circular hole is on the same horizontal line as the axis of the fixing pipe. The fixing pipe communicates with the interior of the housing through the circular hole. The inner side of the circular hole is set as a bevel. A connecting block is fixedly connected to the inner wall of the housing. The hydraulic cylinder is powered by an external power source. The output end of the hydraulic cylinder drives the valve stem to move downward through the connecting assembly. The valve stem drives the fixing block to move downward. The fixing block drives the side plate and the baffle to move downward. The trapezoidal block is located inside the two side plates and the baffle. The baffle and the roller on the outer side of the trapezoidal block are in contact with each other. As the side plate moves, the baffle and the trapezoidal block come into contact and squeeze each other, causing the side plate to move away from the fixing block. This tightness The tight contact allows the valve to achieve bidirectional sealing in the closed state, ensuring a good sealing effect regardless of the direction from which the medium flows towards the valve. This improves the valve's versatility and reliability, while also allowing the valve plate to be better fixed in the valve body, enhancing the overall structural stability of the valve and reducing vibration and swaying of the valve plate under high pressure and high speed fluid impact. This reduces the risk of valve damage and improves the valve's operational reliability under harsh conditions. The connecting block is located at the end of the housing near the valve cover. There are two connecting blocks, symmetrically arranged around the valve plate. A trapezoidal block is fixedly connected to the side of the connecting block away from the housing. Rollers are rotatably connected to the outer side of the trapezoidal block. There are multiple rollers, evenly distributed on both sides of the trapezoidal block, which is located at the interval between the two side plates.

[0011] Preferably, the connecting assembly includes two fixed frames. Bolts are provided on the outer side of the fixed frames, and the two fixed frames are fixedly connected by bolts. Connecting cylinders are fixedly connected inside the fixed frames. The two connecting cylinders are respectively fixedly connected to the output end of the hydraulic cylinder and the valve stem. By setting the connecting assembly, the force generated by the hydraulic cylinder can be accurately transmitted to the valve stem, so that the valve stem moves in the expected direction and force, thereby realizing the opening and closing action of the gate valve. This ensures that the driving force of the hydraulic cylinder can effectively overcome the friction between the valve plate and the valve body, the medium pressure and other resistances, and ensure the normal operation of the valve. There are two connecting cylinders, which are symmetrically arranged around the fixed frame. A circular plate is fixedly connected to the end of the connecting cylinder. The circular plate is located at the interval between the two connecting cylinders. There are two circular plates. An intermediate plate is fixedly connected to the outer side of the circular plate. The intermediate plate is elastic. During the opening and closing process of the valve, especially under high pressure and high speed fluid operation... When in use, it will generate a certain impact force and vibration. The intermediate plate can absorb and buffer these impact forces and vibrations, reducing their damage to the hydraulic cylinder, valve stem and the entire valve system, reducing component wear and fatigue, thereby extending the service life of the valve. The two ends of the intermediate plate are in contact with two circular plates, and a serpentine plate is fixedly connected to the outer side of the circular plates. Since there may be some errors in the installation position of the hydraulic cylinder and valve stem during the actual installation process, the serpentine plate is set to compensate for these installation errors by utilizing the elasticity of the serpentine plate. This allows the hydraulic cylinder and valve stem to achieve a good connection and coordinated work, so that the valve stem will not be subjected to additional resistance or jamming due to installation errors during the movement, reducing valve operation problems caused by inaccurate installation. The two circular plates are connected by the serpentine plate. A guide groove is opened on the outer side of the intermediate plate, and the serpentine plate is located inside the guide groove. An elastic ring is fixedly connected to the outer side of the connecting cylinder, and the elastic ring is located at the interval between the connecting cylinder and the fixed frame.

[0012] This invention provides a hydraulically driven flat gate valve. It has the following advantages:

[0013] 1. This hydraulically driven flat gate valve drives the cleaning plate and scraper to rotate via a rotating shaft. The cleaning plate cleans the outside of the filter screen to prevent clogging, while the scraper cleans the inside of the cavity to prevent impurities from accumulating in the pipeline, causing pipeline blockage and equipment failure, thus ensuring the stable and reliable operation of the entire fluid conveying system.

[0014] Second, this hydraulically driven flat gate valve, through its conical design, allows the fluid to gradually contract within the inner cavity. This adjusts the flow direction and velocity distribution of the medium to a certain extent, enabling it to approach the valve plate in a more stable state. This effectively reduces the direct impact and turbulence of the fluid on the valve plate, reduces erosion and wear on the valve plate sealing surface, and helps extend the service life of the valve plate and the entire valve.

[0015] Third, this hydraulically driven flat gate valve uses a compressed and deformed ring to fill the gap between the valve plate and the valve body, preventing media leakage and ensuring good sealing performance. This prevents fluid from seeping out from the edge of the valve plate when the valve is closed, which is crucial for preventing media leakage, avoiding environmental pollution, and ensuring the normal operation of the system.

[0016] IV. This hydraulically driven flat gate valve, through the return spring and compression spring between the two side plates, allows the elastic element to cause slight deformation of the two side plates when the valve is closed, thereby compensating for the deviation of the sealing surface angle during the processing, so that the valve plate and valve body can fit better and improve the sealing performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-sectional view of the present invention;

[0019] Figure 3 This is a structural schematic diagram of a cross-sectional view of the pipe fitting of the present invention;

[0020] Figure 4 This is a schematic diagram of the valve plate of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the valve plate of the present invention (cross-sectional view).

[0022] Figure 6 For the present invention Figure 5 A structural schematic diagram of the enlarged view at point A in the middle;

[0023] Figure 7 This is a structural schematic diagram of the valve body cross-section of the present invention;

[0024] Figure 8 This is a schematic diagram of the structure of the connecting component of the present invention;

[0025] Figure 9 This is a partial structural schematic diagram of the connecting component of the present invention;

[0026] Figure 10 This is a schematic diagram of the structure of the intermediate plate of the present invention.

[0027] In the diagram: 1. Valve body; 11. Housing; 12. Protrusion; 13. Circular hole; 14. Bevel; 15. Connecting block; 16. Trapezoidal block; 17. Roller; 2. Pipe fitting; 21. Fixed pipe; 22. Filter screen; 23. Rotating shaft; 24. Cleaning plate; 25. Inner cavity; 26. Impeller; 27. Fixed rod; 28. Scraper; 3. Valve cover; 4. Protective sleeve; 5. Connecting assembly; 51. Fixing frame; 52. 53. Bolt; 54. Connecting cylinder; 55. Elastic ring; 56. Serpentine plate; 57. Intermediate plate; 58. Circular plate; 69. Guide groove; 60. Valve plate; 61. Fixing block; 62. Side plate; 63. Through hole; 64. Return spring; 65. Baffle; 66. Circular ring; 67. Groove; 68. Fixing ring; 69. Compression spring; 610. Cylinder; 611. Sleeve; 7. Valve stem; 8. Hydraulic cylinder. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] First embodiment, such as Figures 1 to 3 As shown, the present invention provides a technical solution: a hydraulically driven flat gate valve, including a valve body 1, a valve cover 3 fixedly connected to the top of the valve body 1, a protective cylinder 4 fixedly connected to the top of the valve cover 3, and a hydraulic cylinder 8 fixedly connected to the top of the protective cylinder 4.

[0030] Connecting component 5 is fixedly connected to the output end of hydraulic cylinder 8. Connecting component 5 is located inside protective cylinder 4. A valve stem 7 is fixedly connected to the end of connecting component 5 away from hydraulic cylinder 8. The valve stem 7 passes through valve cover 3 and extends into the interior of valve body 1. The valve stem 7 is located at the center of protective cylinder 4.

[0031] Valve plate 6 is fixedly installed on the end of valve stem 7 away from connecting component 5, and valve plate 6 is located inside valve body 1;

[0032] Fitting 2 is fixedly installed on the outside of valve body 1. There are two fittings 2, which are symmetrically arranged with valve body 1 as the center.

[0033] The fitting 2 includes a fixed pipe 21, which is fixedly connected to the outside of the valve body 1. An inner cavity 25 is formed inside the fixed pipe 21. The inner cavity 25 is tapered, and its diameter gradually decreases towards the end near the valve body 1. Because the diameter of the inner cavity 25 gradually decreases, the fluid velocity inside the inner cavity 25 slowly increases. This relatively high fluid velocity within the fixed pipe 21 reduces the sedimentation and accumulation of impurities in the fluid, keeping the pipe clean and reducing the possibility of blockage. Simultaneously, the tapered shape allows the fluid within the inner cavity 25 to... The inner cavity 25 undergoes a gradual contraction process, which adjusts the flow direction and velocity distribution of the medium to a certain extent, allowing it to approach the valve plate 6 in a more stable state. This effectively reduces the direct impact and turbulence of the fluid on the valve plate 6, reduces erosion and wear on the sealing surface of the valve plate 6, and helps extend the service life of the valve plate 6 and the entire valve, improving the valve's sealing performance and reliability. A filter screen 22 is fixedly connected to the inner wall of the inner cavity 25 away from the valve body 1. A rotating shaft 23 is rotatably connected to the middle of the filter screen 22, passing through the filter screen 22. The rotating shaft 23 is fixed near the outer side of the valve body 1. An impeller 26 is connected to the rotating shaft 23. A cleaning plate 24 is fixedly connected to the end of the shaft 23 furthest from the impeller 26. Multiple cleaning plates 24 are evenly distributed around the rotating shaft 23. A fixing rod 27 is fixedly connected to the outside of the rotating shaft 23. A scraper 28 is fixedly connected to the end of the fixing rod 27 furthest from the rotating shaft 23. A water source is connected to a fixed pipe 21. Water enters the fixed pipe 21 and passes through a filter screen 22, thus filtering impurities in the water. This prevents wear, scratches, or blockage of internal components, ensuring the valve's sealing performance and normal operation. The opening and closing function extends the service life of the valve. Under the flow of water, the impeller 26 rotates, which in turn drives the shaft 23 to rotate. The shaft 23 drives the cleaning plate 24 and the scraper 28 to rotate. Thus, the cleaning plate 24 cleans the outside of the filter screen 22 to prevent the filter screen 22 from clogging. At the same time, the scraper 28 cleans the inside of the inner cavity 25 to prevent impurities from accumulating in the pipeline, causing pipeline blockage and equipment failure, and ensuring the stable and reliable operation of the entire fluid conveying system. The outside of the scraper 28 contacts the inner cavity 25, and the impeller 26 is located at the interval between the fixed rod 27 and the filter screen 22.

[0034] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 4 to 7As shown, the valve plate 6 includes a fixing block 61, which is fixedly connected to the bottom of the valve stem 7. Side plates 62 are slidably connected to the outer side of the fixing block 61. There are two side plates 62, symmetrically arranged around the fixing block 61, with their middle parts contacting each other. A through hole 63 is provided at the end of each side plate 62 away from the fixing block 61, penetrating both sides of the side plates 62. A compression spring 69 is fixedly connected to the side of each side plate 62 near the fixing block 61. When the valve is in the open state, the hydraulic cylinder 8 is powered by an external power source. The output end of the hydraulic cylinder 8 drives the valve stem 7 downward through the connecting assembly 5. The valve stem 7 drives the fixing block 61 downward, and the fixing block 61 drives the side plates 62 on both sides downward, causing the side plates 62 to... The outer through hole 63 is away from the circular hole 13. As the side plate 62 continues to move downward, the bottom fixing ring 68 contacts and is squeezed against the protrusion 12 inside the housing 11. The return spring 64 is stretched, causing the fixing ring 68 to slide on the fixing block 61 away from the protrusion 12. At this time, the side plate 62 is in close contact with the inner walls of both sides of the housing 11. The circular ring 66 is located inside the inclined side 14 of the circular hole 13. The circular ring 66 is compressed and deformed, filling the gap between the valve plate 6 and the valve body 1, preventing medium leakage, ensuring good sealing performance of the valve, and preventing fluid from seeping out from the edge of the valve plate when the valve is closed. This is important for preventing medium leakage, avoiding environmental pollution, and ensuring the normal operation of the system. Compression spring 69 Both ends of the valve plate are fixedly connected to the side plates 62 on both sides. A baffle 65 is fixedly connected to the side plate 62 near the fixed block 61. There is a gap between the baffles 65 on both sides of the fixed block 61. A fixing ring 68 is fixedly connected to the outer side of the side plate 62 near the through hole 63. The side of the fixing ring 68 away from the side plate 62 is inclined. A cylinder 610 is fixedly connected to the outer side of the side plate 62. A sleeve 611 is sleeved on the outer side of the cylinder 610. By setting the sleeve 611 and the cylinder 610, the stability of the valve plate during movement is enhanced. Especially under the action of high pressure and high speed fluid, the vibration and shaking of the valve plate 6 can be reduced, making the valve operation more stable and reliable. The sleeve 611 is slidably connected to the cylinder 610 and fixedly connected to the side plate 62. Next, sleeve 611 and cylinder 610 are respectively connected to the side plates on both sides. A return spring 64 is fixedly connected to the outer side of the side plate 62. By setting the return spring 64 and compression spring 69 between the two side plates 62, when the valve is closed, the elastic element can cause a slight deformation of the two side plates 62, thereby compensating for the deviation of the sealing surface angle during processing, so that the valve plate 6 and the valve body 1 can fit better and improve the sealing performance. At the same time, the elastic element can alleviate the impact force between the valve plate 6 and the valve body 1 when the valve is closed, reduce wear and noise, and also help protect the structural components of the valve and extend the service life of the valve. The return spring 64 is located at the interval between the fixing ring 68 and sleeve 611. A groove 67 is opened on the side of the side plate 62 away from the fixing block 61.The groove 67 is located inside the return spring 64. A ring 66 is fixedly connected to the side plate 62 near the outer side of the groove 67. The ring 66 is elastic and is fitted onto the outer side of the groove 67.

[0035] The valve body 1 includes a housing 11. A protrusion 12 is fixedly connected to the bottom of the inner wall of the housing 11. The protrusion 12 is trapezoidal, and the inclination direction of the side of the protrusion 12 is parallel to the inclination direction of the fixing ring 68. A circular hole 13 is opened on the outer side of the housing 11. The axis of the circular hole 13 is on the same horizontal line as the axis of the fixing tube 21. The fixing tube 21 communicates with the interior of the housing 11 through the circular hole 13. The inner side of the circular hole 13 is set as a bevel 14. A connecting block is fixedly connected to the inner wall of the housing 11. 15. When the hydraulic cylinder 8 is powered by an external power source, its output end drives the valve stem 7 downward through the connecting assembly 5. The valve stem 7 drives the fixed block 61 downward, and the fixed block 61 drives the side plate 62 and the baffle 65 downward. The trapezoidal block 16 is located inside the two side plates 62 and the baffle 65. The baffle 65 is in contact with the roller 17 on the outer side of the trapezoidal block 16. As the side plate 62 moves, the baffle 65 comes into contact with the trapezoidal block 16 and is squeezed, causing the side plate 62 to... Moving away from the fixed block 61, this close contact enables the valve to achieve bidirectional sealing in the closed state. That is, no matter which direction the medium flows into the valve, a good sealing effect can be guaranteed, improving the versatility and reliability of the valve. At the same time, it allows the valve plate 6 to be better fixed in the valve body 1, enhancing the overall structural stability of the valve and reducing the vibration and shaking of the valve plate under the impact of high pressure and high speed fluid, thereby reducing the risk of valve damage and improving the working reliability of the valve under harsh conditions. The connecting block 15 is located at the end of the housing 11 near the valve cover 3. There are two connecting blocks 15, which are symmetrically arranged with the valve plate 6 as the center. A trapezoidal block 16 is fixedly connected to the side of the connecting block 15 away from the housing 11. Rollers 17 are rotatably connected to the outside of the trapezoidal block 16. There are multiple rollers 17, which are evenly distributed on both sides of the trapezoidal block 16. The trapezoidal block 16 is located at the interval between the two side plates 62.

[0036] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figures 8 to 10As shown, the connecting assembly 5 includes a fixed frame 51, of which there are two. Bolts 52 are provided on the outer side of the fixed frame 51, and the two fixed frames 51 are fixedly connected by the bolts 52. A connecting cylinder 53 is fixedly connected inside the fixed frame 51. The two connecting cylinders 53 are respectively fixedly connected to the output end of the hydraulic cylinder 8 and the valve stem 7. By setting the connecting assembly 5, the connecting assembly 5 can accurately transmit the force generated by the hydraulic cylinder 8 to the valve stem 7, causing the valve stem 7 to move in the expected direction and force, thereby realizing the opening and closing action of the gate valve. This ensures that the driving force of the hydraulic cylinder 8 can effectively overcome the frictional force between the valve plate 6 and the valve body 1, the medium pressure, and other resistances, ensuring the normal operation of the valve. There are two connecting cylinders 53, symmetrically arranged around the fixed frame 51. A circular plate 57 is fixedly connected to the end of the connecting cylinder 53, located at the interval between the two connecting cylinders 53. There are two circular plates 57, and an intermediate plate 56 is fixedly connected to the outer side of the circular plate 57. The intermediate plate 56 is elastic. During the opening and closing process of the valve, especially under high pressure and high speed... Under the action of fluid, a certain impact force and vibration will be generated. The intermediate plate 56 can absorb and buffer these impact forces and vibrations, reducing their damage to the hydraulic cylinder 8, valve stem 7 and the entire valve system, reducing component wear and fatigue, and thus extending the service life of the valve. The two ends of the intermediate plate 56 are in contact with two circular plates 57. A serpentine plate 55 is fixedly connected to the outer side of the circular plates 57. Since there may be a certain error in the installation position of the hydraulic cylinder 8 and valve stem 7 during the actual installation process, the serpentine plate 55 is set to utilize its elasticity. Yes, it can compensate for these installation errors, enabling good connection and coordinated operation between the hydraulic cylinder 8 and the valve stem 7. This prevents the valve stem 7 from experiencing additional resistance or jamming during movement due to installation errors, reducing valve operation problems caused by inaccurate installation. The two circular plates 57 are connected by a serpentine plate 55. A guide groove 58 is provided on the outer side of the intermediate plate 56, and the serpentine plate 55 is located inside the guide groove 58. An elastic ring 54 is fixedly connected to the outer side of the connecting cylinder 53, and the elastic ring 54 is located at the interval between the connecting cylinder 53 and the fixed frame 51.

[0037] In use, the fixed pipe 21 is connected to an external water source. Water enters the interior of the fixed pipe 21 and passes through the filter screen 22, thereby filtering out impurities in the water. This prevents internal components from being worn, scratched, or blocked, thus ensuring the valve's sealing performance and normal opening and closing function, and extending the valve's service life. The water flow drives the impeller 26 to rotate, which in turn drives the rotating shaft 23 to rotate. The rotating shaft 23 drives the cleaning plate 24 and the scraper 28 to rotate. Thus, the cleaning plate 24 cleans the outside of the filter screen 22 to prevent it from clogging, while the scraper 28 cleans the inside of the inner cavity 25.

[0038] With the valve in the open state, the hydraulic cylinder 8 is powered by an external power source. The output end of the hydraulic cylinder 8 drives the valve stem 7 to move downward through the connecting assembly 5. The valve stem 7 drives the fixing block 61 to move downward, and the fixing block 61 drives the side plates 62 on both sides to move downward, so that the through holes 63 on the outer side of the side plates 62 move away from the round hole 13. As the side plates 62 continue to move downward, the bottom fixing ring 68 contacts and squeezes the protrusion 12 inside the housing 11. The return spring 64 is stretched by force, so that the fixing ring 68 is forced to drive the side plates 62 on both sides to slide on the fixing block 61 and move away from the protrusion 12. At this time, the side plates 62 are in close contact with the inner walls on both sides of the housing 11. The ring 66 is located inside the inclined side 14 of the round hole 13. The ring 66 is compressed and deformed, filling the gap between the valve plate 6 and the valve body 1, preventing medium leakage, ensuring that the valve has good sealing performance, and thus closing the valve.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic actuated flat gate valve characterized by, Include: Valve body (1), the top of the valve body (1) is fixedly connected with valve cover (3), the top of the valve cover (3) is fixedly connected with protective cylinder (4), the top of the protective cylinder (4) is fixedly connected with hydraulic cylinder (8); Connecting assembly (5), the output end of the connecting assembly (5) is fixedly connected with the hydraulic cylinder (8), the connecting assembly (5) is located in the inside of the protective cylinder (4), one end of the connecting assembly (5) away from the hydraulic cylinder (8) is fixedly connected with valve stem (7), the valve stem (7) penetrates through the valve cover (3) and extends to the inside of the valve body (1), the valve stem (7) is located in the center of the protective cylinder (4); Valve plate (6), the valve plate (6) is fixedly installed at one end of the valve stem (7) away from the connecting assembly (5), the valve plate (6) is located in the inside of the valve body (1); Pipe fitting (2), the pipe fitting (2) is fixedly installed on the outside of the valve body (1), the number of the pipe fitting (2) is two, and the two pipe fittings (2) are symmetrically arranged with the valve body (1) as the center; Wherein, the pipe fitting (2) includes a fixed pipe (21), the fixed pipe (21) is fixedly connected with the outside of the valve body (1), an inner cavity (25) is formed in the inside of the fixed pipe (21), the inner cavity (25) is tapered, and the diameter of the inner cavity (25) gradually decreases towards the end close to the valve body (1), the inner wall of the end of the inner cavity (25) away from the valve body (1) is fixedly connected with a filter screen (22), a rotating shaft (23) is rotatably connected to the middle of the filter screen (22), the rotating shaft (23) penetrates through the filter screen (22), a impeller (26) is fixedly connected to the outside of the rotating shaft (23) close to the valve body (1), a cleaning plate (24) is fixedly connected to the end of the rotating shaft (23) away from the impeller (26); The valve plate (6) includes a fixed block (61), the fixed block (61) is fixedly connected with the bottom of the valve stem (7), a side plate (62) is slidably connected to the outside of the fixed block (61), the number of the side plate (62) is two, and the two side plates (62) are symmetrically arranged with the fixed block (61) as the center; A through hole (63) is formed in one end of the side plate (62) away from the fixed block (61), the through hole (63) penetrates through the side plates (62) on both sides of the fixed block (61), a compression spring (69) is fixedly connected to one side of the side plate (62) close to the fixed block (61), the both ends of the compression spring (69) are fixedly connected with the side plates (62) on both sides respectively, a baffle (65) is fixedly connected to the side of the side plate (62) close to the fixed block (61), and there is a gap between the baffles (65) on both sides of the fixed block (61). The valve body (1) includes a housing (11), and a connecting block (15) is fixedly connected to the inner wall of the housing (11). The connecting block (15) is located at one end of the housing (11) near the valve cover (3). There are two connecting blocks (15), and the two connecting blocks (15) are symmetrically arranged with the valve plate (6) as the center. A trapezoidal block (16) is fixedly connected to the side of the connecting block (15) away from the housing (11). A roller (17) is rotatably connected to the outer side of the trapezoidal block (16). There are multiple rollers (17), and the multiple rollers (17) are evenly distributed on both sides of the trapezoidal block (16). The trapezoidal block (16) is located at the interval between the two side plates (62). The connecting component (5) includes a fixing frame (51), and there are two fixing frames (51). Bolts (52) are provided on the outside of the fixing frame (51). The two fixing frames (51) are fixedly connected by bolts (52). A connecting cylinder (53) is fixedly connected inside the fixing frame (51). There are two connecting cylinders (53). The two connecting cylinders (53) are symmetrically arranged with the fixing frame (51) as the center. A circular plate (57) is fixedly connected to the end of the connecting cylinder (53). The circular plate (57) is located at the interval between the two connecting cylinders (53). There are two circular plates (57).

2. A hydraulic actuated flat gate valve according to claim 1, characterized in that: There are multiple cleaning plates (24), and the multiple cleaning plates (24) are evenly distributed around the rotating shaft (23). A fixing rod (27) is fixedly connected to the outside of the rotating shaft (23). A scraper (28) is fixedly connected to the end of the fixing rod (27) away from the rotating shaft (23). The outside of the scraper (28) is in contact with the inner cavity (25). The impeller (26) is located at the interval between the fixing rod (27) and the filter screen (22).

3. A hydraulic actuated flat gate valve according to claim 1, wherein: A fixing ring (68) is fixedly connected to the outer side of the side plate (62) near the through hole (63). The fixing ring (68) is inclined on the side away from the side plate (62). A cylinder (610) is fixedly connected to the outer side of the side plate (62). A sleeve (611) is sleeved on the outer side of the cylinder (610). The sleeve (611) is slidably connected to the cylinder (610). The sleeve (611) is fixedly connected to the side plate (62). The sleeve (611) and the cylinder (610) are respectively connected to the side plates on both sides.

4. A hydraulic actuated flat gate valve according to claim 3, wherein: A return spring (64) is fixedly connected to the outer side of the side plate (62). The return spring (64) is located at the interval between the fixing ring (68) and the sleeve (611). A groove (67) is provided on the side of the side plate (62) away from the fixing block (61). The groove (67) is located inside the return spring (64). A ring (66) is fixedly connected to the outer side of the side plate (62) near the groove (67). The ring (66) is sleeved on the outer side of the groove (67).

5. A hydraulic actuated flat gate valve as defined in claim 1, wherein: A protrusion (12) is fixedly connected to the bottom of the inner wall of the housing (11). The protrusion (12) is trapezoidal. The inclination direction of the side of the protrusion (12) is parallel to the inclination direction of the fixing ring (68). A circular hole (13) is opened on the outer side of the housing (11). The axial direction of the circular hole (13) is on the same horizontal straight line as the axis of the fixing tube (21). The fixing tube (21) communicates with the interior of the housing (11) through the circular hole (13). The inner side of the circular hole (13) is set as a bevel (14).

6. A hydraulic actuated flat gate valve as defined in claim 1, wherein: An intermediate plate (56) is fixedly connected to the outer side of the circular plate (57). The two ends of the intermediate plate (56) are in contact with the two circular plates (57). A serpentine plate (55) is fixedly connected to the outer side of the circular plate (57). The two circular plates (57) are connected by the serpentine plate (55). A guide groove (58) is provided on the outer side of the intermediate plate (56). The serpentine plate (55) is located inside the guide groove (58). An elastic ring (54) is fixedly connected to the outer side of the connecting cylinder (53). The elastic ring (54) is located at the interval between the connecting cylinder (53) and the fixed frame (51).

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