A double-disc electric gate valve

Abstract

The present invention discloses a double-disc electric gate valve, which relates to the technical field of electric gate valves. The electric gate valve comprises an electric actuator, a connecting portion, and a valve body. A flow chamber and an adjustment chamber are provided in the valve body. Each flow chamber is provided with a flow guide portion connected to the adjustment chamber. The electric actuator can control the opening and closing portion to move in the adjustment chamber to seal and connect the two flow chambers. The present invention cooperates with the flow guide and the flow chamber. On the one hand, the flow guide effectively scrapes away impurities adsorbed on the side wall of the flow chamber, and seals the flow guide portion with a sealing member to complete the second-stage closure of the valve body. On the other hand, the pressure value of the fluid in the flow chamber is gradually changed by the continuous first-stage closure and second-stage closure to avoid the problem of water hammer effect caused by instantaneous increase of the pressure value of the fluid in the flow chamber.

Description

Technical Field

[0001] The present invention relates to the technical field of electric gate valves, in particular to a double-disc electric gate valve. Background Art

[0002] The double-disc electric gate valve is a special type of gate valve, primarily consisting of two parallel gates and a wedging mechanism. An electric actuator drives the valve stem up and down to open and close the valve. This unique design offers a variety of excellent performance characteristics. Double-disc electric gate valves are widely used in industries such as petroleum, chemical, metallurgy, electric power, and water conservancy, particularly where strict leakage control and high pressure environments are required.

[0003] Chinese patent application number 202311391470.0 discloses a parallel double-disc gate valve, comprising a valve body and a long stem. A valve cover is mounted on the vertical opening of the valve body. A support flange and a stand are fixedly mounted on the valve cover. A pneumatic drive is fixedly mounted on the stand. The top of the long stem is connected to the movable end of the pneumatic drive. This invention utilizes a manual drive and a pneumatic drive to ensure that the parallel double-disc gate valve can be closed and opened even in the event of a pneumatic drive failure.

[0004] Chinese patent application number 200910118054.7 discloses a parallel double-disc gate valve. The valve body has a sealing device that reciprocates up and down. The sealing component includes a core head with a tapered surface and a keyway that can accommodate a roller. The groove on the inclined plate is movably connected to the rib. The inclined surface, roller, end face, and flat surface are in contact with each other. The cone is inserted into a hole on one side of the gate plate. The gasket is placed on the step of the inclined plate and contacts the flat surface of the step in the gate plate. The outer cylindrical surface of the fixing plate is placed in the hole of the gate plate. The bolt is connected to the thread through the hole of the fixing plate. The valve maintains good sealing performance in high temperature and high pressure environments and can have a longer service life.

[0005] Similar to the above-mentioned electric gate valve of the prior art, when the electric actuator drives the valve body to seal the pipeline, the fluid in the pipeline will continue to flow forward due to inertia, which will cause the fluid speed in the pipeline to suddenly decrease and the pressure to increase sharply, thereby generating a water hammer effect, causing the pipeline to rupture and the valve to be damaged. The water hammer effect will also generate noise and vibration, which will have an adverse impact on the normal operation of the equipment and the surrounding environment.

[0006] Moreover, when the fluid in the pipeline is contaminated, it is usually necessary to completely close the pipeline and disassemble and inspect each electric gate valve on the pipeline one by one to find the source of the contaminated fluid and repair it. This method is time-consuming and labor-intensive and cannot quickly find the source of the contamination. At the same time, after long-term use, the sealing end of the electric gate valve will slide with the inner wall of the pipeline, so the sealing end will wear out, resulting in weakened sealing performance and failure to complete the closure of the pipeline.

[0007] Therefore, it is necessary to invent a double-disc electric gate valve to solve the above problems. Summary of the Invention

[0008] The object of the present invention is to provide a double-disc electric gate valve to solve the problems raised in the above background technology.

[0009] To achieve the above objectives, the present invention provides the following technical solutions: a double-disc electric gate valve, comprising an electric actuator and a connecting portion, the electric gate valve further comprising: a valve body, the valve body defining a flow chamber and a regulating chamber, each flow chamber being provided with a flow guide communicating with the regulating chamber; an opening and closing portion, the opening and closing portion being disposed within the regulating chamber and capable of being controlled by the electric actuator to move within the regulating chamber to seal and communicate the two flow chambers; the opening and closing portion comprising two annular, deformable sealing members, each of the two sealing members being provided with a wedge at one end proximate the regulating chamber, the wedge being capable of pushing the sealing member to deform under the influence of fluid, thereby sealing the sealing member with the flow chamber; a flow guide being slidably connected to the end of each sealing member remote from the regulating chamber, the flow guide being slidably connected to the inner wall of the flow chamber, a pushing member being fixedly connected to the end of the wedge remote from the seal, a plurality of elastic return members being provided in an annular array at the end proximate the regulating chamber, and a limit member being fixedly connected to the other end of each elastic return member on the same pushing member.

[0010] Preferably, the regulating chamber is arranged between the two flow chambers, and the regulating chamber is connected to the intersection of the two flow chambers. When the opening and closing part moves from the regulating chamber to the flow chamber, the regulating chamber is connected to the flow chamber through the guide part; when the opening and closing part moves in the flow chamber and blocks the guide part, the regulating chamber and the guide part are not connected.

[0011] Preferably, a connecting hole is provided in the middle of each of the wedge-shaped member and the pushing member, and the diameter of the connecting hole is the same as the diameter of the inner ring of the sealing member.

[0012] Preferably, each of the guide members is fixedly connected to a sliding member in the central area of ​​one side close to the sealing member, and the sliding member includes a connecting end and a sliding end, one side of the connecting end is fixedly connected to the guide member, and the other side of the connecting end passes through the sealing member, the wedge member and the pushing member in sequence and is fixedly connected to the sliding end.

[0013] Preferably, the two sliding ends are connected to a driving member on one side close to each other, and each sliding end is provided with a wedge-shaped surface that cooperates with the driving member on the side in contact with the driving member, and the top of each sliding end is provided with a limiting plate for limiting the driving member, and the adjacent two limiting plates are connected by multiple elastic telescopic rods.

[0014] Preferably, the top of the driving member is connected to the electric actuator, the two ends of the driving member contacting the two sliding members are wedge-shaped surfaces, and the top and bottom of the driving member are flat surfaces.

[0015] Preferably, a limiting ring is provided on the outer side of each limiting member, and the limiting ring is slidably connected to the side of the flow chamber. A boss is fixedly connected to the middle of the bottom end of the regulating chamber, and a triangular opening and closing member is fixedly connected to the top of the boss. Two baffles that are compatible with the limiting ring are symmetrically arranged on both sides of the boss.

[0016] Preferably, the guide portion includes a guide groove, which is opened in the flow cavity and close to one end of the regulating cavity. A connecting groove is opened on the top of each guide groove, one end of the connecting groove is connected to the regulating cavity, and the other end of the connecting groove is connected to the flow cavity through the guide groove.

[0017] Preferably, the electric actuator includes a connecting shell and a transmission assembly, a drive motor is provided in the connecting shell, the output shaft of the drive motor is connected to the push rod through the transmission assembly, the drive motor is used to control the push rod to move up and down reciprocatingly, and the bottom of the push rod is fixedly connected to the driving member.

[0018] Preferably, the connecting portion includes a sealing cover, which is connected to the top of the valve body through multiple bolts. A support frame is fixedly connected to the sealing cover, and the push rod passes through the support frame and extends into the valve body, and a stabilizing member in contact with the push rod is provided on the support frame.

[0019] The technical effects and advantages of the present invention are as follows:

[0020] 1. The present invention utilizes the interaction between the flow guide and the flow chamber. On the one hand, the flow guide effectively scrapes away impurities adsorbed on the side wall of the flow chamber, and the seal seals the flow guide portion to complete the first-order and second-order closures of the valve body. On the other hand, the pressure of the fluid in the flow chamber is gradually changed through the continuous first-order and second-order closures, thereby avoiding the problem of water hammer effect caused by an instantaneous increase in the pressure of the fluid in the flow chamber.

[0021] 2. The present invention arranges a seal, a guide member and a guide portion in the valve body. On the one hand, the pressure generated by the fluid on the push member changes the diameter of the seal so that the seal can effectively seal the valve body even if it is worn. On the other hand, the fluid is collected through the regulating chamber, which facilitates rapid transfer to the source of contamination when the fluid in the pipeline is contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic structural diagram of the present invention from another angle.

[0024] Figure 3 It is a schematic diagram of the half-section structure of the valve body of the present invention.

[0025] Figure 4 It is a schematic diagram of the half-section structure of the valve body and the opening and closing part of the present invention.

[0026] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure in the middle.

[0027] Figure 6 It is a schematic diagram of the explosion structure of the opening and closing part of the present invention.

[0028] Figure 7 This is a structural schematic diagram of the opening and closing portion of the present invention being located in the flow cavity.

[0029] Figure 8 This is a structural schematic diagram of the opening and closing portion of the present invention located in the adjustment cavity.

[0030] In the figure: 1. Electric actuator; 11. Connecting shell; 12. Push rod; 2. Connecting part; 21. Sealing cover; 22. Support frame; 23. Stabilizing member; 3. Valve body; 31. Flow chamber; 32. Adjusting chamber; 33. Guide part; 331. Guide groove; 332. Connecting groove; 34. Boss; 35. Opening and closing member; 36. Baffle; 4. Opening and closing part; 41. Sealing member; 42. Wedge-shaped member; 43. Guide member; 44. Pushing member; 45. Elastic reset member; 46. Limiting member; 47. Sliding member; 471. Connecting end; 472. Sliding end; 473. Limiting plate; 48. Driving member; 49. Limiting ring. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 2 As shown, the first embodiment of the present invention provides a double-disc electric gate valve, comprising an electric actuator 1 , a connecting portion 2 , a valve body 3 and an opening and closing portion 4 provided in the valve body 3 .

[0033] Among them, the electric actuator 1 includes a connecting shell 11 and a transmission assembly. A driving motor is provided in the connecting shell 11. The output shaft of the driving motor is connected to the push rod 12 through the transmission assembly. The driving motor is used to control the push rod 12 to move up and down. By arranging the transmission assembly and the driving motor in the connecting shell 11 and connecting the push rod 12 to the opening and closing part 4, when the valve body 3 needs to be closed, the driving motor is controlled to operate so that the output shaft of the driving motor drives the push rod 12 to move downward through the transmission assembly, so that the opening and closing part 4 seals the inside of the valve body 3 to achieve the closure of the valve body 3.

[0034] In this embodiment, the connecting part 2 includes a sealing cover 21, which is connected to the top of the valve body 3 by multiple bolts. A support frame 22 is fixedly connected to the sealing cover 21, and the push rod 12 passes through the support frame 22 and extends into the valve body 3. A stabilizing member 23 in contact with the push rod 12 is provided on the support frame 22. By arranging the support frame 22 on the sealing cover 21 and the stabilizing member 23 on the support frame 22, the push rod 12 is effectively supported and limited, thereby avoiding the problem of bending of the push rod 12 due to excessive pressure on the bottom during the up and down movement, which affects the closing problem.

[0035] like Figure 3 As shown, in this embodiment, a flow chamber 31 and a regulating chamber 32 are provided in the valve body 3. The regulating chamber 32 is provided between the two flow chambers 31, and the regulating chamber 32 is communicated with the intersection of the two flow chambers 31. By providing two flow chambers 31 in the valve body 3 and connecting the two flow chambers 31 through the regulating chamber 32, the fluid first flows in one flow chamber 31 after entering the valve body 3 and then flows into the other flow chamber 31 through the regulating chamber 32. When it is necessary to seal the two flow chambers 31, the electric actuator 1 drives the opening and closing part 4 to move from the top of the regulating chamber 32 to the bottom of the regulating chamber 32, thereby sealing the two flow chambers 31 provided below the regulating chamber 32, thereby achieving sealing of the two flow chambers 31.

[0036] like Figure 4-Figure 8As shown, in this embodiment, the opening and closing part 4 is arranged in the regulating chamber 32, and the electric actuator 1 can control the opening and closing part 4 to move in the regulating chamber 32 to seal and connect the two flow chambers 31. The opening and closing part 4 includes two annular and deformable seals 41, and each seal 41 is slidably connected to a guide member 43 at one end away from the regulating chamber 32. The guide member 43 is slidably connected to the inner wall of the flow chamber 31. Each guide member 43 is fixedly connected to a sliding member 47 in the central area of ​​one side close to the seal 41. The sliding member 47 includes a connecting end 471 and a sliding end 472. One side of the connecting end 471 is fixedly connected to the guide member 43, and the other side of the connecting end 471 passes through the seal 41, the wedge member 42 and the push member 44 in sequence and is fixedly connected to the sliding end 472.

[0037] By providing a guide member 43 at the end of each seal 41 away from the regulating chamber 32, when the seal 41 needs to be moved from the regulating chamber 32 to the flow chamber 31, the guide member 43 will first enter the flow chamber 31 and scrape the inner wall of the flow chamber 31, thereby cleaning the impurities adsorbed on the inner wall of the flow chamber 31, avoiding the problem of excessive wear of the seal 41 by impurities, and improving the service life of the seal 41.

[0038] In this embodiment, the two sliding ends 472 are connected to a driving member 48 on one side where they are close to each other, and a wedge-shaped surface that cooperates with the driving member 48 is provided on the side where each sliding end 472 is in contact with the driving member 48, and a limiting plate 473 is provided on the top of each sliding end 472 to limit the driving member 48, and the two adjacent limiting plates 473 are connected by a plurality of elastic telescopic rods, the bottom of the push rod 12 is fixedly connected to the driving member 48, and a boss 34 is fixedly connected to the middle of the bottom end of the adjustment cavity 32, and a triangular opening and closing member 35 is fixedly connected to the top of the boss 34.

[0039] The top of the driving member 48 is connected to the electric actuator 1, and the two ends of the driving member 48 that contact the two sliding members 47 are wedge-shaped surfaces. The top and bottom of the driving member 48 are flat surfaces. By setting the sliding ends 472 of the driving member 48 and the sliding member 47 as wedge-shaped surfaces, the driving member 48 can push the two sliding ends 472 to separate from each other during the downward movement.

[0040] In this embodiment, when it is necessary to control the sealing member 41 to seal the flow chamber 31, the push rod 12 is driven to move downward by the electric actuator 1, and the push rod 12 will drive the driving member 48 to move downward. During this process, since the two limit plates 473 are connected by multiple elastic telescopic rods, the force of the driving member 48 on the two sliding ends 472 is less than the pulling force of the elastic telescopic rod on the limit plate 473. Therefore, the driving member 48 will drive the two sliding ends 472 to move from the upper side of the regulating chamber 32 to the lower side of the regulating chamber 32, thereby realizing the first-order closure of the flow chamber 31.

[0041] When the bottom of the sliding end 472 contacts the top of the opening and closing member 35, the push rod 12 continues to move downward, but the sliding end 472 cannot continue to move downward under the limit of the opening and closing member 35. Therefore, the force of the push rod 12 on the sliding end 472 will gradually increase. At this time, the action of the push rod 12 on the sliding end 472 will be greater than the pulling force of the elastic telescopic rod on the limit plate 473. In this state, through the downward force of the driving member 48 and the limit of the opening and closing member 35, the two sliding ends 472 will move away from the driving member 48. Since the sliding end 472 is fixedly connected to the connecting end 471, the sliding end 472 can drive the connecting end 471 and the guide member 43 to move into the flow chamber 31, thereby moving the guide member 43 and the sealing member 41 into the flow chamber 31, performing a second-stage closure on the flow chamber 31, thereby completing the closure of the valve body 3.

[0042] However, when the electric actuator 1 drives the valve body 3 to seal the pipeline, the fluid in the pipeline will continue to flow forward due to inertia, which will cause the fluid speed in the pipeline to suddenly decrease and the pressure to increase sharply, thereby generating a water hammer effect, causing the pipeline to rupture and the valve to be damaged.

[0043] Therefore, based on a double-disc electric gate valve in the above embodiment, in another embodiment of the present invention, the electric gate valve further includes: each flow chamber 31 is provided with a guide portion 33 connected to the regulating chamber 32, and when the opening and closing portion 4 moves from the regulating chamber 32 to the flow chamber 31, the regulating chamber 32 is connected to the flow chamber 31 through the guide portion 33; when the opening and closing portion 4 moves in the flow chamber 31 and blocks the guide portion 33, the regulating chamber 32 and the guide portion 33 are not connected, and the guide portion 33 includes a guide groove 331, which is opened in the flow chamber 31 and close to one end of the regulating chamber 32, and a connecting groove 332 is opened on the top of each guide groove 331, one end of the connecting groove 332 is connected to the regulating chamber 32, and the other end of the connecting groove 332 is connected to the flow chamber 31 through the guide groove 331.

[0044] When it is necessary to block the flow of fluid in the flow chamber 31 through the valve body 3, the driving member 48 is first driven by the control push rod 12 to move from top to bottom in the regulating chamber 32 to achieve a first-order closure of the valve body 3. During this process, the guide members 43 located on both sides of the driving member 48 will gradually coincide with the opening of the flow chamber 31 due to the drive of the driving member 48. At this time, the fluid flowing in the flow chamber 31 is blocked by the guide members 43, and part of the fluid will move through the guide groove 331 provided on the flow chamber 31 to the connecting groove 332, and move into the regulating chamber 32 through the connecting groove 332, thereby achieving buffering of the fluid in the flow chamber 31, and effectively avoiding the problem of damage to the valve body 3 caused by excessive fluid pressure in the flow chamber 31 when closing.

[0045] When the driving member 48 cooperates with the opening and closing member 35 to move the two sliding ends 472 away from each other to perform a second-stage closure of the flow chamber 31 during the movement, the guide member 43 will drive the sealing member 41 to move in the direction away from the driving member 48. In this process, the impurities adsorbed on the side wall of the flow chamber 31 are scraped off through the setting of the guide member 43, and the impurities in this area are moved into the regulating chamber 32 through the flow of the fluid, and then the sealing member 41 is moved into the flow chamber 31 to seal the guide groove 331 set in the flow chamber 31, thereby completing the closure of the valve body 3.

[0046] It should be noted that when the valve body 3 is opened, the impurities moved into the regulating chamber 32 will follow the fluid and move from the regulating chamber 32 to the flow chamber 31, and finally flow out of the electric gate valve, thereby avoiding the problem of excessive impurities in the closed area of ​​the electric gate valve causing excessive wear of the seal 41. Moreover, since the diameter of the guide member 43 is slightly smaller than the diameter of the flow chamber 31, when the guide member 43 coincides with the flow chamber 31 and moves into the flow chamber 31, and the seal 41 has not moved into the flow chamber 31, part of the fluid moves toward the seal 41 through the gap between the guide member 43 and the flow chamber 31, thereby flushing the side of the seal 41, avoiding the side of the seal 41 from absorbing impurities, resulting in poor sealing effect or excessive wear of the seal 41.

[0047] However, when the fluid in the pipeline is contaminated, it is usually necessary to completely close the pipeline and disassemble and inspect each electric gate valve on the pipeline one by one to find the source of the contaminated fluid and repair it. This method is time-consuming and labor-intensive and cannot quickly find the source of the contamination. At the same time, after long-term use, the sealing end of the electric gate valve will slide against the inner wall of the pipeline, so the sealing end will wear out, resulting in weakened sealing performance and inability to complete the closure of the pipeline.

[0048] Therefore, based on a double-gate electric gate valve in the above embodiment, in another embodiment of the present invention, the electric gate valve further includes: a wedge-shaped member 42 is respectively provided at one end of the two sealing members 41 close to the regulating chamber 32, and the wedge-shaped member 42 can push the sealing member 41 to deform under the drive of the fluid so that the sealing member 41 is sealed and connected to the flow chamber 31. The end of the wedge-shaped member 42 away from the sealing member 41 is fixedly connected to a pushing member 44, and each pushing member 44 is provided with a plurality of elastic reset members 45 in a ring array at the end close to the regulating chamber 32. The other end of each elastic reset member 45 on the same pushing member 44 is fixedly connected to a limiting member 46, and a limiting ring 49 is sleeved on the outer side of each limiting member 46, and the limiting ring 49 is slidably connected to the side of the flow chamber 31.

[0049] By providing a limiting groove on the side wall of one end of the two flow chambers 31 close to the regulating chamber 32, and allowing the limiting ring 49 to slide with the side wall of the flow chamber 31 through the limiting groove, the limiting ring 49 can only slide vertically on the side wall of the flow chamber 31. When the push rod 12 pushes the driving member 48 to move downward and the bottom of the sliding end 472 does not contact the opening and closing member 35, the driving member 48 will drive the sliding end 472 to move downward. At this time, due to the bottom of the sliding end 472 and the bottom inner of the limiting member 46, the limiting ring 49 can only slide vertically on the side wall of the flow chamber 31. The two sides are in contact with each other, so the sliding end 472 will drive the limiting ring 49 to slide downward synchronously through the limiting member 46. At the same time, since the limiting member 46 and the pushing member 44 are elastically connected through the elastic reset member 45, the elastic force of the elastic reset member 45 applies an extrusion force to the pushing member 44, so that the pushing member 44 always drives the wedge member 42 to fit and extrude the sealing member 41, thereby avoiding the problem that the sealing member 41 deviates from the valve body 3 due to the flow of fluid during movement.

[0050] In this embodiment, a connecting hole is provided in the middle of the wedge-shaped member 42 and the push member 44. The diameter of the connecting hole is the same as the diameter of the inner ring of the sealing member 41. Two baffles 36 adapted to the limit ring 49 are symmetrically arranged on both sides of the boss 34. A sampling hole is provided on the sealing cover 21, and a water level sensor is provided in the regulating chamber 32.

[0051] First, when the valve body 3 needs to be closed, the push rod 12 is driven by the electric actuator 1 to drive the driving member 48 to move downward, thereby driving the sliding ends 472 arranged on both sides of the driving member 48 to move downward. In this process, since the sliding ends 472 are arranged on the inner side of the limiting member 46, the limiting member 46 will drive the limiting ring 49 to move downward synchronously with the sliding end 472. When the limiting ring 49 contacts the baffle 36 arranged at the bottom of the regulating chamber 32, the bottom of the sliding end 472 contacts the top of the opening and closing member 35, and the guide member 4 3 and the flow chamber 31 overlap with each other, completing the first-order closure of the valve body 3. At this time, part of the fluid in the flow chamber 31 will move into the regulating chamber 32 through the guide part 33 due to the resistance of the guide member 43, thereby reducing the pressure of the fluid in the flow chamber 31, avoiding the problem of water hammer effect caused by excessive fluid pressure in the flow chamber 31 and causing damage to the valve body 3. At the same time, another part of the fluid flows into the regulating chamber 32 through the gap between the guide member 43 and the flow chamber 31 to flush the seal 41, avoiding the problem of impurities adsorbed on the seal 41 affecting the sealing effect.

[0052] Secondly, when the bottom of the sliding end 472 contacts the top of the opening and closing member 35 and the push rod 12 continues to drive the driving member 48 to move downward, the force of the driving member 48 on the sliding end 472 will gradually increase, thereby overcoming the elastic force of the elastic telescopic rod and driving the two sliding ends 472 to move away from the driving member 48. In this process, the sliding end 472 will drive the guide member 43 to move into the flow chamber 31 through the connecting end 471. Since the fluid in the flow chamber 31 continues to move into the regulating chamber 32, the pressure in the regulating chamber 32 will continue to increase. The seal 41 and the wedge-shaped member 42 are always clamped between the pusher 44 to prevent the seal 41 from deflecting and losing the sealing effect. At the same time, the impurities adsorbed on the side wall of the flow chamber 31 are effectively scraped off by the guide member 43, and the guide portion 33 is sealed by the seal 41 to complete the second-order closure of the valve body 3. The pressure value of the fluid in the flow chamber 31 is gradually changed by the continuous first-order closure and second-order closure to avoid the problem of water hammer effect caused by the instantaneous increase of the fluid pressure value in the flow chamber 31.

[0053] Again, when the seal 41 is severely worn after long-term use and loses its sealing effect, at this time, since the diameter of the guide groove 331 is larger than the diameter of the flow chamber 31, when the seal 41 moves to the guide groove 331, the seal 41 can still seal the flow chamber 31. In this state, the fluid in the flow chamber 31 will continuously enter the regulating chamber 32 through the guide groove 331, causing the pressure of the fluid in the regulating chamber 32 to continuously increase. Under the action of pressure, the fluid in the regulating chamber 32 will overcome the elastic force of the elastic telescopic rod and continue to drive the pushing member 44 to move in the direction of the guide member 43. Since the seal 41 is annular in structure as a whole and is made of a material with deformation ability, when the pushing member 44 drives the wedge member 42 to move toward the seal 41, the wedge member 42 will continuously squeeze the seal 41 to cause the seal 41 to deform outward, thereby increasing the diameter of the seal 41 and fitting with the guide groove 331, so that the seal 41 can still effectively seal the valve body 3 when severe wear occurs.

[0054] It should be noted that, by arranging a water level sensor in the regulating chamber 32, the water level of the fluid in the regulating chamber 32 is detected in real time, and an electrically controlled sealing valve is arranged in the communicating groove 332. When it is detected that the water level of the fluid in the regulating chamber 32 reaches the preset value and continues to increase, it means that the sealing member 41 is severely worn and loses its sealing effect, and the fluid continuously enters the regulating chamber 32 through the guide portion 33. At this time, by controlling the closing of the electrically controlled sealing valve on the communicating groove 332 at the water outlet end, the fluid pressure in the regulating chamber 32 is continuously increased, thereby driving the push member 44 to move to realize the closure of the valve body 3.

[0055] Finally, when it is detected that the fluid in a pipeline in a certain area is contaminated, the two electrically controlled sealing valves on the same valve body 3 are controlled to close, so that the regulating chamber 32 is completely sealed, and the fluid in the regulating chamber 32 in each valve body 3 is sampled by setting a sampling hole on the sealing cover 21, so as to determine the specific location of the pollution source in this area, thereby realizing rapid maintenance of multiple valve bodies 3 in the same area, effectively solving the problem in the prior art that the pollution source cannot be quickly found and each electric gate valve on this pipeline needs to be disassembled and inspected.

[0056] It should be noted that the present invention provides a sealing member 41, a guide member 43 and a guide portion 33 in the valve body 3, so that the electric actuator 1 drives the guide member 43 to move vertically and horizontally, and divides the closing of the valve body 3 into two parts. On the one hand, the pressure of the fluid in the flow chamber 31 is gradually relieved, effectively avoiding the occurrence of the water hammer effect. On the other hand, the fluid in the flow chamber 31 is discharged into the regulating chamber 32, and the pressure generated by the fluid on the push member 44 changes the diameter of the sealing member 41, so that the sealing member 41 can effectively seal the valve body 3 even if it is worn. At the same time, the impurities adsorbed on the flow chamber 31 are effectively cleaned by the movement of the guide member 43, avoiding the problem of excessive impurities affecting the sealing effect or causing excessive wear of the seal 41, and the fluid is collected through the regulating chamber 32, so that when the fluid in the pipeline is contaminated, it is convenient to quickly transfer it to the source of pollution.

[0057] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-disc electric gate valve, comprising an electric actuator (1) and a connecting portion (2), characterized in that: The electric gate valve also includes: A valve body (3), wherein a flow chamber (31) and a regulating chamber (32) are provided in the valve body (3), and each flow chamber (31) is provided with a flow guide portion (33) communicating with the regulating chamber (32); An opening and closing portion (4), the opening and closing portion (4) being arranged in the regulating chamber (32), and the electric actuator (1) being capable of controlling the opening and closing portion (4) to move in the regulating chamber (32) to seal and connect the two flow chambers (31); The opening and closing portion (4) includes two annular and deformable sealing members (41), each of the two sealing members (41) having one end close to the regulating chamber (32) provided with a wedge-shaped member (42), the wedge-shaped member (42) being able to push the sealing member (41) to deform under the drive of the fluid so that the sealing member (41) is sealed and connected to the flow chamber (31), and each of the sealing members (41) having one end away from the regulating chamber (32) is slidably connected to a flow guide member (43), the flow guide member (43) being slidably connected to the inner wall of the flow chamber (31), the end of the wedge-shaped member (42) away from the sealing member (41) is fixedly connected to a pushing member (44), and each of the pushing members (44) having one end close to the regulating chamber (32) is provided with a plurality of elastic reset members (45) in an annular array, and the other end of each elastic reset member (45) on the same pushing member (44) is fixedly connected to a limiting member (46).

2. The electric gate valve according to claim 1, characterized in that: The regulating chamber (32) is arranged between the two flow chambers (31), and the regulating chamber (32) and the two flow chambers (31) are communicated with each other at their intersection. When the opening and closing portion (4) moves from the regulating chamber (32) into the flow chamber (31), the regulating chamber (32) is communicated with the flow chamber (31) via the flow guide portion (33); when the opening and closing portion (4) moves in the flow chamber (31) and blocks the flow guide portion (33), the regulating chamber (32) and the flow guide portion (33) are not communicated with each other.

3. The electric gate valve according to claim 2, characterized in that: A connecting hole is provided in the middle of each of the wedge-shaped member (42) and the pushing member (44), and the diameter of the connecting hole is the same as the diameter of the inner ring of the sealing member (41).

4. The electric gate valve according to claim 3, characterized in that: A sliding member (47) is fixedly connected to the central area of ​​one side of each guide member (43) close to the sealing member (41), and the sliding member (47) includes a connecting end (471) and a sliding end (472). One side of the connecting end (471) is fixedly connected to the guide member (43), and the other side of the connecting end (471) passes through the sealing member (41), the wedge member (42) and the pushing member (44) in sequence and is fixedly connected to the sliding end (472).

5. The electric gate valve according to claim 4, characterized in that: The two sliding ends (472) are connected to a driving member (48) on one side thereof, and a wedge-shaped surface matching the driving member (48) is provided on the side of each sliding end (472) that is in contact with the driving member (48). A limiting plate (473) for limiting the driving member (48) is provided on the top of each sliding end (472), and two adjacent limiting plates (473) are connected by a plurality of elastic telescopic rods.

6. The electric gate valve according to claim 5, characterized in that: The top of the driving member (48) is connected to the electric actuator (1), the two ends of the driving member (48) in contact with the two sliding members (47) are wedge-shaped surfaces, and the top and bottom of the driving member (48) are flat surfaces.

7. The electric gate valve according to claim 6, characterized in that: A limiting ring (49) is sleeved on the outer side of each limiting member (46), and the limiting ring (49) is slidably connected to the side of the flow chamber (31). A boss (34) is fixedly connected to the middle of the bottom end of the regulating chamber (32), and a triangular opening and closing member (35) is fixedly connected to the top of the boss (34). Two baffles (36) adapted to the limiting ring (49) are symmetrically arranged on both sides of the boss (34).

8. The electric gate valve according to claim 7, characterized in that: The guide portion (33) comprises a guide groove (331), the guide groove (331) being provided in the flow chamber (31) and close to one end of the regulating chamber (32), and a connecting groove (332) being provided at the top of each guide groove (331), one end of the connecting groove (332) being connected to the regulating chamber (32), and the other end of the connecting groove (332) being connected to the flow chamber (31) via the guide groove (331).

9. The electric gate valve according to claim 8, characterized in that: The electric actuator (1) comprises a connecting housing (11) and a transmission assembly. A drive motor is provided in the connecting housing (11). The output shaft of the drive motor is connected to the push rod (12) through the transmission assembly. The drive motor is used to control the push rod (12) to move up and down. The bottom of the push rod (12) is fixedly connected to the driving member (48).

10. The electric gate valve according to claim 9, characterized in that: The connecting portion (2) includes a sealing cover (21), the sealing cover (21) is connected to the top of the valve body (3) through a plurality of bolts, a support frame (22) is fixedly connected to the sealing cover (21), the push rod (12) passes through the support frame (22) and extends into the valve body (3), and a stabilizing member (23) in contact with the push rod (12) is provided on the support frame (22).

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