Large-flow flat gate valve

Abstract

The present invention relates to the technical field of valves, and discloses a large-flow flat gate valve, which includes a valve body. A valve cover is connected to the top of the valve body. A valve stem is slidably installed on the top of the valve cover. A top gate is connected to the bottom of the valve stem. Two bottom gates are slidably connected to the bottom of the top gate. It further includes an anti-deposition device for preventing sediment from depositing inside the valve body; a cleaning device for cleaning the surface of the bottom gate; and an ice-breaking device for breaking the ice layer attached to the surface of the bottom gate. Through the cooperation of the two bottom gates and the two movable valve seats, when the two bottom gates are closing downward, they can respectively move a certain distance towards the two movable valve seats, so that the two bottom gates are respectively in contact with the two movable valve seats. By utilizing the elastic action of the two rubber rings and the two rubber blocks, the two bottom gates can remain in contact with the two movable valve seats under different ambient temperatures, thereby ensuring the sealing performance.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a large-flux flat gate valve. Background Art

[0002] The flat gate valve is a sliding valve with a parallel gate as the closing part. The working principle of the flat gate valve is mainly based on the linear motion of the gate to achieve the opening and closing control of the fluid. The gate slides perpendicular to the direction of the fluid and cuts into the fluid to close. When the gate slides to completely cover the flow channel, the valve is closed; when the gate completely moves away from the flow channel, the valve is opened.

[0003] Chinese patent CN114593219A discloses "a flat gate valve", including a valve body, a power gate and an auxiliary gate, wherein the power gate and the auxiliary gate are wedge-type gates, which can be provided with a forced sealing force by the actuator when the valve is sealed, thereby ensuring the sealing performance of the valve at low pressure. Furthermore, the wedge-type elastic gate can effectively reduce the friction during the opening and closing of the valve, and effectively increase the service life of the valve. The structure of this patent enables the valve to be repaired online, improving the convenience of valve maintenance, the packing leakage detection mechanism can effectively prevent valve packing leakage, and the opening assistance mechanism effectively reduces the friction between the gate and the sealing surface after the valve is opened, thereby reducing the operating thrust of the valve.

[0004] However, the prior art has the following problems:

[0005] 1. When the existing flat gate valve is used in a large-flow pipeline, the temperature difference in different seasons causes the gate plate and valve seat in the gate valve to have gaps due to thermal expansion and contraction. Since the large-flow flat gate valve has a larger volume, the deformation caused by thermal expansion and contraction is also greater, resulting in a larger gap, which affects the sealing of the gate valve.

[0006] 2. When the water flow in a large-volume pipeline carries sediment, when the water flows through the gate valve, part of the sediment sinks into the gate valve body by gravity. Since there is a gap between the gate valve, the two valve seats and the valve body for the gate valve to move up and down, when more sediment is deposited in this gap, when the gate valve is closed, the bottom of the gate valve cannot be completely closed into the gap due to the obstruction of the sediment, causing the gate valve to be not tightly closed. At the same time, the sediment in the gap will also aggravate the wear of the gate valve and shorten the service life of the gate valve. Summary of the invention

[0007] The purpose of the present invention is to provide a large-flux flat gate valve in order to solve the above-mentioned problems and overcome the defects of the prior art, as described in detail below.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The large-flow flat gate valve provided by the present invention includes a valve body. A valve cover is connected to the top of the valve body. A valve stem is slidably installed on the top of the valve cover. The bottom of the valve stem is located inside the valve body. A top gate plate is connected to the bottom of the valve stem. Two bottom gate plates are slidably connected to the bottom of the top gate plate. The two bottom gate plates are arranged in a mirror image. Two mounting seats are installed on the inner wall of the valve body. Rubber blocks are connected to the mounting seats. The two rubber blocks are respectively located on the left and right sides of the bottom gate plate. Inclined blocks are respectively connected to the left and right sides of the bottom gate plate. The two inclined blocks on the two sides of the same bottom gate plate contact the two rubber blocks respectively during movement. Water passing holes are respectively arranged on the front and rear sides of the valve body. A fixing ring is installed in the water passing hole of the valve body. A movable valve seat is slidably connected to the inner side of the fixing ring. A rubber ring is sleeved between the movable valve seat and the fixing ring. The two bottom gate plates contact the two movable valve seats respectively during movement; it further includes an anti-deposition device for preventing sediment from depositing inside the valve body, and the anti-deposition device is arranged inside the valve body; a cleaning device for cleaning the surface of the bottom gate plate, and two cleaning devices are provided, and the two cleaning devices are respectively arranged on the inner walls of the front and rear sides of the valve body; an ice-breaking device for breaking the ice layer attached to the surface of the bottom gate plate, and two ice-breaking devices are provided, and the two ice-breaking devices are respectively arranged on the two bottom gate plates.

[0010] Preferably, the anti-deposition device includes two connecting frames. Both of the two connecting frames are installed on the top gate plate. A pull rod is connected to the connecting frame. A head is arranged at the bottom of the pull rod. The two pull rods are respectively located on the left and right sides of the top gate plate. A movable cover is slidably installed inside the valve body.

[0011] Preferably, the middle part of the movable cover is set to be arc-shaped. Slide holes are respectively arranged at both ends of the movable cover. The two pull rods are respectively slidably connected to the two slide holes of the movable cover. The head at the bottom of the pull rod contacts the bottom of the movable cover during movement. The movable cover is located below the two bottom gate plates. The top surface of the movable cover coincides with the two movable valve seats during movement.

[0012] Preferably, a plurality of sliding grooves are formed on the top surface of the movable cover. An inner sliding plate is slidably installed inside the movable cover. A plurality of convex blocks are connected to the inner sliding plate. The plurality of convex blocks are respectively slidably connected to the plurality of sliding grooves on the top surface of the movable cover. A rotating shaft is rotatably installed inside the movable cover. The top end of the rotating shaft is rotatably connected to a water wheel. An arc-shaped block is connected to the outer wall of the rotating shaft. A long groove is formed in the central part of the inner sliding plate. The rotating shaft is located in the long groove of the inner sliding plate. The rotating shaft slides in contact with the edge of the long groove of the inner sliding plate when rotating.

[0013] Preferably, the cleaning device comprises a mounting box, the mounting box is mounted on the inner wall of the valve body, a scraper is mounted in the mounting box, and two scrapers of the two cleaning devices are in contact with the surface of the lower gate plate respectively.

[0014] Preferably, the cleaning device also includes a collection box, and the two collection boxes are respectively mounted on the front and rear outer walls of the valve body, and two rebound sliders are slidably mounted on the outer wall edge of the installation box close to the lower gate plate, and a return spring is arranged between the rebound slider and the installation box, and the two rebound sliders on the same installation box are set as a group, and lower pressure frames are respectively installed on the front and rear sides of the upper gate plate, and the two lower pressure frames respectively contact with the two groups of rebound sliders on the two installation boxes during movement, and a connecting rod is hinged at the bottom of the rebound slider, and a push frame and a slide seat are slidably installed in the installation box, and the slide seat is a U-shaped setting, a rotating plate is rotatably connected to the slide seat, and a limiting rod is installed on the slide seat.

[0015] Preferably, one end of the two connecting rods away from the rebound slider is hinged to the push frame, the rotating plate is in sliding contact with the top of the push frame, the push frame is in contact with the slide seat during movement, and the rotating plate abuts against the limit rod during movement, and a plurality of return springs are arranged between the slide seat and the inner wall of the installation box, and a drain hole is opened on the inner wall of the installation box on the side away from the lower gate plate, and the drain hole passes through the connecting valve body and the collecting box, and a check valve is arranged inside the drain hole.

[0016] Preferably, the ice breaking device includes an inner sliding rod, a mounting groove is provided on the lower gate plate, the inner sliding rod is slidably installed in the mounting groove, a mounting shaft is installed in the mounting groove, two ice crushing plates are rotatably installed on the outer wall of the mounting shaft, the two ice crushing plates are mirror-imaged, a curved block is connected to the side of the ice crushing plate facing the mounting groove, an inclined top block is slidably installed in the mounting groove, the inclined top block is connected to the inner sliding rod, a return spring is connected between the inclined top block and the mounting groove, the inclined top block slides in contact with the two curved blocks when moving, and a spring is connected between the ice crushing plate and the mounting groove.

[0017] Preferably, two interference rods are installed on the inner wall of the valve body, and the end of the inner sliding rod away from the installation groove is set as an arc-shaped end. The arc-shaped ends of the two inner sliding rods of the two ice-breaking devices are in sliding contact with the two interference rods respectively during movement.

[0018] The beneficial effects are:

[0019] 1. The large-flow flat gate valve, through the cooperation of two lower gate plates and two movable valve seats, when the two lower gate plates close downward, they can respectively move a certain distance towards the two movable valve seats, so that the two lower gate plates are respectively attached to the two movable valve seats. By the elastic action of two rubber rings and two rubber blocks, at different ambient temperatures, the two lower gate plates can be kept attached to the two movable valve seats, thus ensuring the sealing performance.

[0020] 2. The large-flow flat gate valve, through the setting of the anti-deposition device, after the two lower gate plates are opened, the movable cover can move upward between the two movable valve seats to block the sediment in the water from sinking to the bottom of the valve body, maintaining the smoothness of the movement tracks of the two lower gate plates, and avoiding the accumulation of sediment in the valve body to block the normal closing of the two lower gate plates; through the setting of the inner slide plate and multiple bumps, the multiple bumps continuously lift the sediment deposited on the top surface of the movable cover through reciprocating up and down movements, causing the sediment at this position to surge and flow along with the water flow, avoiding the attachment of more sediment on the top surface of the movable cover and affecting the use effect.

[0021] 3. The large-flow flat gate valve, through the setting of two cleaning devices, when the two lower gate plates are opened, the two scraping strips respectively scrape off the attachments on the surfaces of the two lower gate plates, avoiding that after the lower gate plates are used for a long time, there are too many attachments accumulated on the surface and caking occurs, which affects the fitting degree with the movable valve seats and thus affects the sealing performance; through the cooperation of the sliding seat and the rotating plate, the rotating plate can catch the attachments scraped off from the lower gate plates. When the lower gate plates close downward, the rotating plate can flip and discharge the attachments into the collection box through the sewage discharge hole in cooperation with the sliding seat, which is convenient for the staff to clean and avoids the accumulation of attachments in the valve body.

[0022] 4. The large-flow flat gate valve, through the setting of two ice-breaking devices, when the two lower gate plates open upward, the two ice-breaking plates on the lower gate plates break the ice layer by flipping outward, so that the ice layer on the lower gate plates falls off, avoiding the generation of a large frictional force due to the attachment of the ice layer on the lower gate plates when the lower gate plates move upward, increasing the operating pressure of the valve stem and the driving part, and generating the risk of valve stem fracture and driving part damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is the external view schematic diagram of the present invention;

[0025] Figure 2It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the valve body structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the lower gate structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the inclined plane block structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the movable valve seat structure of the present invention;

[0030] Figure 7 It is a schematic diagram of the anti-deposition device structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the arc-shaped block structure of the present invention;

[0032] Figure 9 It is a schematic diagram of the cleaning device structure of the present invention;

[0033] Figure 10 It is a schematic diagram of the installation box structure of the present invention;

[0034] Figure 11 It is a schematic diagram of the scraping strip structure of the present invention;

[0035] Figure 12 It is a schematic diagram of the rotating plate structure of the present invention;

[0036] Figure 13 It is a schematic diagram of the ice-breaking device structure of the present invention;

[0037] Figure 14 It is a schematic diagram of the ice-breaking plate structure of the present invention.

[0038] Explanation of reference numerals is as follows: 1. Valve body; 2. Valve cover; 3. Anti-deposition device; 31. Connecting frame; 32. Pull rod; 33. Movable cover; 34. Inner sliding plate; 35. Protrusion; 36. Rotating shaft; 37. Water wheel; 38. Arc-shaped block; 4. Cleaning device; 41. Installation box; 42. Scraping strip; 43. Pressing frame; 44. Rebound slider; 45. Connecting rod; 46. Pushing frame; 47. Sliding seat; 48. Rotating plate; 49. Limiting rod; 410. Drainage hole; 411. Collection box; 5. Ice-breaking device; 51. Contact rod; 52. Installation groove; 53. Inner sliding rod; 54. Installation shaft; 55. Ice-breaking plate; 56. Curved surface block; 57. Inclined plane top block; 58. Elastic sheet; 6. Valve rod; 7. Upper gate; 8. Lower gate; 9. Installation seat; 10. Rubber block; 11. Inclined plane block; 12. Fixed ring; 13. Movable valve seat; 14. Rubber ring. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0040] Embodiment 1

[0041] Please refer to Figure 1 - Figure 6, a large-flow flat gate valve, including a valve body 1, a valve cover 2 is connected to the top of the valve body 1, a valve stem 6 is slidably installed on the top of the valve cover 2, the bottom of the valve stem 6 is located inside the valve body 1, the bottom of the valve stem 6 is connected to an upper gate plate 7, two lower gate plates 8 are slidably connected to the bottom of the upper gate plate 7, the two lower gate plates 8 are arranged in a mirror image, a connecting flange is arranged on the top of the valve cover 2, and the connecting flange can be connected and installed with a driving member according to actual needs. After the driving member is connected to the top of the valve stem 6, the valve stem 6 is driven to move up and down by the driving member. When the valve stem 6 moves upward, it drives the upper gate plate 7 to move up and down, and the upper gate plate 7 drives the two lower gate plates 8 to move up and down. When the two lower gate plates 8 move upward in place, the flow channel is opened, and when the two lower gate plates 8 move downward in place, the flow channel is closed. Two mounting seats 9 are installed on the inner wall of the valve body 1, rubber blocks 10 are connected to the mounting seats 9, and the two rubber blocks 10 are respectively located on the left and right sides of the lower gate plate 8. Slope blocks 11 are respectively connected to the left and right sides of the lower gate plate 8. The two slope blocks 11 on the same side of the same lower gate plate 8 contact the two rubber blocks 10 respectively during movement. Taking the same side of the two lower gate plates 8 as an example, when the two slope blocks 11 move downward and contact the rubber blocks 10, the rubber blocks 10 squeeze the two slope blocks 11 to both sides, so that the two slope blocks 11 drive the two lower gate plates 8 to move away from each other. Water passing holes are respectively arranged on the front and back sides of the valve body 1. A fixed ring 12 is installed in the water passing hole of the valve body 1. A movable valve seat 13 is slidably connected to the inner side of the fixed ring 12. A rubber ring 14 is sleeved between the movable valve seat 13 and the fixed ring 12. The two lower gate plates 8 contact the two movable valve seats 13 respectively during movement. The four slope blocks 11 drive the two lower gate plates 8 to move away from each other for a certain distance through the cooperation with the two rubber blocks 10. The surfaces of the two lower gate plates 8 are respectively abutted against the two movable valve seats 13. Since the rubber ring 14 always abuts against the movable valve seat 13, the movable valve seat 13 can have a certain amount of expansion and contraction on the fixed ring 12. When the lower gate plate 8 abuts against the movable valve seat 13, the movable valve seat 13 can contract a certain distance into the fixed ring 12 by using the elasticity of the rubber ring 14, so that the movable valve seat 13 maintains the extrusion force on the surface of the lower gate plate 8. In different temperature environments, due to the certain elastic deformation of the rubber ring 14 and the rubber block 10, the two lower gate plates 8 and the two movable valve seats 13 can always maintain a fitting state, thus ensuring the sealing performance; through the cooperation of the two lower gate plates 8 and the two movable valve seats 13, when the two lower gate plates 8 are closed downward, they can respectively move a certain distance toward the two movable valve seats 13, so that the two lower gate plates 8 are respectively fitted with the two movable valve seats 13. By using the elastic action of the two rubber rings 14 and the two rubber blocks 10, in different ambient temperatures, the two lower gate plates 8 can always maintain a fitting state with the two movable valve seats 13, thus ensuring the sealing performance.

[0042] Further, please refer to Figure 4 , Figure 7 - Figure 8, further comprising an anti-deposition device 3 for preventing sediment from depositing inside the valve body 1. The anti-deposition device 3 is arranged inside the valve body 1 and includes two connecting frames 31. Both of the two connecting frames 31 are installed on the upper gate 7. A pull rod 32 is connected to the connecting frame 31. The bottom of the pull rod 32 is provided with an end head. The two pull rods 32 are respectively located on the left and right sides of the upper gate 7. An activity cover 33 is slidably installed inside the valve body 1. The middle part of the activity cover 33 is set to be arc-shaped. Slide holes are respectively provided at both ends of the activity cover 33. The two pull rods 32 are respectively slidably connected to the two slide holes of the activity cover 33. The end heads at the bottom of the pull rods 32 contact the bottom of the activity cover 33 during the movement process. When the upper gate 7 moves upward, the two pull rods 32 are respectively driven to move upward through the two connecting frames 31, so that the two pull rods 32 slide upward in the two slide holes of the activity cover 33. The two end heads move upward until they contact the bottom of the activity cover 33. When the two pull rods 32 continue to move upward, the two end heads lift the activity cover 33 upward. The activity cover 33 is located below the two lower gates 8. The top surface of the activity cover 33 coincides with the two movable valve seats 13 during the movement process. After the upper gate 7 moves upward in place, the activity cover 33 moves to a position where it fits with the water passing holes of the valve body 1. At this time, the activity cover 33 can form a complete flow channel with the two water passing holes of the valve body 1 and the two movable valve seats 13. The sediment carried in the water flow cannot sink to the bottom of the valve body 1 after being blocked by the activity cover 33, greatly reducing the accumulation of sediment in the movement range of the two lower gates 8; a plurality of sliding grooves are formed on the top surface of the activity cover 33. An inner sliding plate 34 is slidably installed inside the activity cover 33. A plurality of convex blocks 35 are connected to the inner sliding plate 34. The plurality of convex blocks 35 are respectively slidably connected to the plurality of sliding grooves on the top surface of the activity cover 33. A rotating shaft 36 is rotatably installed inside the activity cover 33. The top end of the rotating shaft 36 is rotatably connected to a water wheel 37. An arc-shaped block 38 is connected to the outer wall of the rotating shaft 36. The water flow drives the water wheel 37 to rotate. The water wheel 37 drives the arc-shaped block 38 to rotate through the rotating shaft 36. A long groove is formed in the central part of the inner sliding plate 34. The rotating shaft 36 is located in the long groove of the inner sliding plate 34. When the rotating shaft 36 rotates, it slidably contacts the edge of the long groove of the inner sliding plate 34. When the arc-shaped block 38 rotates, it can drive the inner sliding plate 34 to move up and down reciprocally through the long groove. The plurality of convex blocks 35 on the inner sliding plate 34 follow the inner sliding plate 34 to move up and down reciprocally. The plurality of convex blocks 35 can continuously lift the sediment on the surface of the activity cover 33 through the up and down reciprocating movement, so that the sediment on the surface of the activity cover 33 surges and then flows along with the water flow, avoiding part of the sediment from depositing on the top surface of the activity cover 33 when the water flow velocity is slow; through the setting of the anti-deposition device 3, after the two lower gates 8 are opened, the activity cover 33 can move upward between the two movable valve seats 13, blocking the sediment in the water from sinking to the bottom of the valve body 1, maintaining the smoothness of the movement track of the two lower gates 8, and avoiding the accumulation of sediment in the valve body 1 from blocking the normal closing of the two lower gates 8;Through the setting of the inner slide plate 34 and the multiple bumps 35, the multiple bumps 35 continuously lift the sediment deposited on the top surface of the movable cover 33 through reciprocating up and down movement, causing the sediment at this position to surge and flow along with the water flow, avoiding excessive sediment attachment on the top surface of the movable cover 33 and affecting the use effect.

[0043] Furthermore, please refer to Figure 9 - Figure 12, a cleaning device 4 is used to clean the surface of the lower gate plate 8. Two cleaning devices 4 are provided. The two cleaning devices 4 are respectively arranged on the inner walls of the front and rear sides of the valve body 1. The cleaning device 4 includes a mounting box 41. The mounting box 41 is mounted on the inner wall of the valve body 1. A scraper 42 is installed in the mounting box 41. The two scrapers 42 of the two cleaning devices 4 are in contact with the surface of the lower gate plate 8 respectively. When the two lower gate plates 8 move upward, the two scrapers 42 in the two mounting boxes 41 can scrape off the attachments on the surface of the lower gate plate 8, thereby maintaining the smoothness of the surface of the lower gate plate 8, and avoiding the accumulation of more attachments on the surface of the lower gate plate 8 after long-term use, which affects the fit between the lower gate plate 8 and the movable valve seat 13;The cleaning device 4 also includes a collection box 411, and the two collection boxes 411 are respectively installed on the outer walls of the front and rear sides of the valve body 1. Two rebound sliders 44 are slidably installed on the outer wall edge of the installation box 41 near the lower gate plate 8. A return spring is arranged between the rebound slider 44 and the installation box 41. The two rebound sliders 44 on the same installation box 41 are set as a group. Lower pressure frames 43 are respectively installed on the front and rear sides of the upper gate plate 7. The two lower pressure frames 43 contact the two groups of rebound sliders 44 on the two installation boxes 41 during movement. The bottom of the rebound slider 44 is hinged with a connecting rod 45. A push frame 46 and a slide seat 47 are slidably installed in the installation box 41. The slide seat 47 is a U-shaped setting, and a rotating spring is rotatably connected to the slide seat 47. The attachments scraped off by the scraper strip 42 fall on the rotating plate 48, and a limiting rod 49 is installed on the slide seat 47. The ends of the two connecting rods 45 away from the rebound slider 44 are hinged to the push frame 46. When the two rebound sliders 44 move downward, the push frame 46 is driven by the two connecting rods 45 to move in the direction away from the lower gate plate 8. The rotating plate 48 slides in contact with the top of the push frame 46. The push frame 46 contacts the slide seat 47 during the movement. The rotating plate 48 abuts against the limiting rod 49 during the movement. In the process of moving in the direction away from the lower gate plate 8, the push frame 46 first pushes the rotating plate 48 through its top to make the rotating plate 48 flip over. During the flipping process of the rotating plate 48, it contacts the limiting rod 49, and the limiting rod 49 abuts against the rotating plate 48 The rotating plate 48 stops turning over. At this time, the rotating plate 48 and the sliding seat 47 set as a 凵 shape form a plane. A plurality of return springs are arranged between the sliding seat 47 and the inner wall of the installation box 41. A drain hole 410 is opened on the inner wall of the installation box 41 away from the lower gate plate 8. The drain hole 410 passes through the connecting valve body 1 and the collecting box 411. The plane formed by the rotating plate 48 and the sliding seat 47 squeezes the attachments toward the drain hole 410 when moving in the direction away from the lower gate plate 8. A check valve is arranged inside the drain hole 410. After being squeezed by the rotating plate 48 and the sliding seat 47, the attachments flow into the collecting box 411 through the drain hole 410. The check valve in the drain hole 410 can prevent the attachments from flowing back. The collection box 411 can be cleaned regularly. Through the setting of the two cleaning devices 4, when the two lower gates 8 are opened, the two scrapers 42 respectively scrape off the attachments on the surfaces of the two lower gates 8, so as to avoid the attachments accumulated on the surface of the lower gates 8 after long-term use and agglomeration, which affects the fit between the movable valve seat 13 and the sealing performance; through the cooperation of the slide seat 47 and the rotating plate 48, the rotating plate 48 can catch the attachments scraped off the lower gate 8. When the lower gate 8 is closed downward, the rotating plate 48 can flip over and discharge the attachments through the drainage hole 410 into the collection box 411 through the cooperation with the slide seat 47, so as to facilitate the cleaning of the staff and avoid the accumulation of attachments in the valve body 1. ;

[0044] For further information, see Figure 13 - Figure 14The ice-breaking device 5 is used to break the ice layer attached to the surface of the lower gate plate 8. Two ice-breaking devices 5 are provided. The two ice-breaking devices 5 are respectively arranged on the two lower gate plates 8. The ice-breaking device 5 includes an inner slide bar 53. The lower gate plate 8 is provided with a mounting groove 52. The inner slide bar 53 is slidably installed in the mounting groove 52. Two abutment rods 51 are installed on the inner wall of the valve body 1. One end of the inner slide bar 53 away from the mounting groove 52 is set as an arc end. The arc ends of the two inner slide bars 53 of the two ice-breaking devices 5 are respectively in sliding contact with the two abutment rods 51 during the movement. When the lower gate plate 8 is opened upward, the arc of the inner slide bar 53 The inner end of the inner slide bar 53 contacts the abutment rod 51, and the inner slide bar 53 is subjected to the reverse thrust of the abutment rod 51, so that the inner slide bar 53 slides into the mounting groove 52. A mounting shaft 54 ​​is installed in the mounting groove 52. Two ice crushing plates 55 are rotatably installed on the outer wall of the mounting shaft 54. The two ice crushing plates 55 are mirror-imaged. When the two ice crushing plates 55 are not turned over, they form a plane with the surface of the lower gate plate 8. A curved surface block 56 is connected to the side of the ice crushing plate 55 facing the mounting groove 52. An inclined top block 57 is slidably installed in the mounting groove 52. The inclined top block 57 is connected to the inner slide bar 53, and a return spring is connected between the inclined top block 57 and the mounting groove 52. The inclined top block 57 slides with the two curved surface blocks 56 during movement, and the inner slide rod 53 drives the inclined top block 57 to slide in the direction close to the two curved surface blocks 56. The inclined surface of the inclined top block 57 applies thrust to the two curved surface blocks 56, so that the two curved surface blocks 56 drive the two ice crushing plates 55 to flip outward with the installation shaft 54 ​​as the axis. When the two ice crushing plates 55 flip outward, they can crush the lower gate plate 8 and the ice layer attached to their own surface, so that the ice layer on the surface of the lower gate plate 8 falls off. A spring piece 58 is connected between the ice crushing plate 55 and the installation groove 52. After the ice layer is broken, the two ice crushing plates 55 are reset by the elastic force of the two spring pieces 58 , the two ice-breaking plates 55 and the surface of the lower gate plate 8 form a plane again, and the two ice-breaking plates 55 are flipped outward only when the lower gate plate 8 is opened upward, and are immediately reset after flipping, so as to avoid affecting the movement trajectory of the lower gate plate 8; through the arrangement of the two ice-breaking devices 5, when the two lower gate plates 8 are opened upward, the two ice-breaking plates 55 on the lower gate plates 8 break the ice layer by flipping outward, so that the ice layer on the lower gate plates 8 falls off, and it is avoided that when the lower gate plates 8 move upward, a large friction force is generated due to the ice layer attached to themselves, which increases the operating pressure of the valve stem 6 and the driving component, and generates the risk of the valve stem 6 breaking and the driving component being damaged.

[0045] With the above structure, the working principle of this case is as follows: a connecting flange is provided at the top of the valve cover 2, and the connecting flange can be connected and installed with a driving member according to actual requirements. After the driving member is connected to the top of the valve stem 6, the valve stem 6 is driven to move up or down by the driving member. When the valve stem 6 moves upward, the upper gate plate 7 is driven to move upward, and the upper gate plate 7 drives the two lower gate plates 8 to move upward. When the driving member drives the valve stem 6 to move downward, the upper gate plate 7 and the two lower gate plates 8 move downward. When the two lower gate plates 8 move upward to the in-place position, the flow channel is opened. When the two lower gate plates 8 move downward to the in-place position, the flow channel is closed. When the two lower gate plates 8 are about to move downward to the in-place position, the two rubber blocks 10 on the two mounting seats 9 respectively contact the four inclined plane blocks 11 on the two lower gate plates 8. Taking the same side of the two lower gate plates 8 as an example, when the two inclined plane blocks 11 move downward and contact the rubber blocks 10, the rubber blocks 10 squeeze the two inclined plane blocks 11 to both sides, so that the two inclined plane blocks 11 respectively drive the two lower gate plates 8 to move away from each other. The same is true for the two inclined plane blocks 11 on the other side. The four inclined plane blocks 11 drive the two lower gate plates 8 to move away from each other for a certain distance through the cooperation with the two rubber blocks 10. The surfaces of the two lower gate plates 8 are respectively abutted against the two movable valve seats 13. Since the rubber ring 14 always abuts against the movable valve seat 13, the movable valve seat 13 can have a certain amount of expansion and contraction on the fixed ring 12. When the lower gate plate 8 abuts against the movable valve seat 13, the movable valve seat 13 can contract a certain distance into the fixed ring 12 by using the elasticity of the rubber ring 14, so that the movable valve seat 13 maintains the squeezing force on the surface of the lower gate plate 8. In different temperature environments, due to the certain elastic deformation of the rubber ring 14 and the rubber block 10, the two lower gate plates 8 and the two movable valve seats 13 can always maintain a fitting state, thus ensuring the sealing performance; through the cooperation of the two lower gate plates 8 and the two movable valve seats 13, when the two lower gate plates 8 are closed downward, they can respectively move a certain distance toward the two movable valve seats 13, so that the two lower gate plates 8 are respectively fitted with the two movable valve seats 13. By using the elastic action of the two rubber rings 14 and the two rubber blocks 10, the two lower gate plates 8 can maintain a fitting state with the two movable valve seats 13 in different ambient temperatures, thus ensuring the sealing performance.

[0046] When the two lower gate plates 8 are closed, the ends of the two pull rods 32 are at a certain distance from the bottom of the movable cover 33. When the upper gate plate 7 moves upward, it drives the two pull rods 32 to move upward through the two connecting frames 31 respectively, so that the two pull rods 32 slide upward in the two sliding holes of the movable cover 33. The two ends move upward until they contact the bottom of the movable cover 33. When the two pull rods 32 continue to move upward, the two ends lift the movable cover 33 upward, causing the movable cover 33 to move upward. When the upper gate plate 7 moves upward in place, the movable cover 33 moves to a position where it fits with the water passing holes of the valve body 1. At this time, the movable cover 33 can form a complete flow channel with the two water passing holes of the valve body 1 and the two movable valve seats 13. The sediment carried in the water flow cannot sink to the bottom of the valve body 1 due to the blockage of the movable cover 33, greatly reducing the accumulation of sediment in the moving range of the two lower gate plates 8 and preventing the two lower gate plates 8 from being blocked by sediment when closing downward. When the two lower gate plates 8 close downward, they contact the top surface of the movable cover 33 and push the movable cover 33 downward to reset it; when the movable cover 33 is located in the flow channel, the water flow drives the water wheel 37 to rotate, the water wheel 37 drives the rotating shaft 36 to rotate, and when the rotating shaft 36 rotates, it drives the arc-shaped block 38 to rotate. During the rotation of the arc-shaped block 38, when the arc-shaped block 38 contacts the edge of the long groove of the inner sliding plate 34, the arc surface of the arc-shaped block 38 slides along the edge of the long groove and applies an upward thrust to the inner sliding plate 34 through the long groove, causing the inner sliding plate 34 to move upward. When the arc-shaped block 38 does not contact the edge of the long groove and is entirely located in the long groove, the inner sliding plate 34 resets by its own gravity, enabling the arc-shaped block 38 to drive the inner sliding plate 34 to move up and down reciprocally. The multiple bumps 35 on the inner sliding plate 34 move up and down reciprocally with the inner sliding plate 34. When the bump 35 moves to the lowest point, the bump 35 and the top surface of the movable cover 33 form a plane. When the bump 35 moves upward, the top surface of the bump 35 protrudes from the top surface of the movable cover 33. Through the up and down reciprocating movement of the multiple bumps 35, the sediment on the surface of the movable cover 33 can be continuously lifted and form a fine water flow, causing the sediment on the surface of the movable cover 33 to surge and flow along with the water flow, preventing part of the sediment from depositing on the top surface of the movable cover 33 when the water flow velocity is slow. After the movable cover 33 resets downward, the sediment moves into the valve body 1 along with the movable cover 33, thus affecting the two lower gate plates 8; through the setting of the anti-deposition device 3, after the two lower gate plates 8 are opened, the movable cover 33 can move upward between the two movable valve seats 13, blocking the sediment in the water from sinking to the bottom of the valve body 1, maintaining the smoothness of the movement track of the two lower gate plates 8, and preventing the valve body 1 from accumulating sediment and blocking the normal closing of the two lower gate plates 8; through the setting of the inner sliding plate 34 and the multiple bumps 35, the multiple bumps 35 continuously lift the sediment deposited on the top surface of the movable cover 33 through the up and down reciprocating movement, causing the sediment at this position to surge and flow along with the water flow, preventing too much sediment from adhering to the top surface of the movable cover 33 and affecting the use effect.

[0047] When the two lower gate plates 8 move upward, the two scraper strips 42 in the two installation boxes 41 can scrape off the attachments on the surface of the lower gate plates 8, thereby maintaining the smoothness of the surface of the lower gate plates 8 and avoiding the accumulation of a large number of attachments on the surface of the lower gate plates 8 after long-term use, which affects the fit between the lower gate plates 8 and the movable valve seat 13; taking one of the cleaning devices 4 as an example, when the lower gate plates 8 move upward, the attachments scraped off by the scraper strips 42 fall on the rotating plate 48, and when the upper gate plates 7 and the lower gate plates 8 move downward, the upper gate plate 7 drives the lower pressure frame 43 to move downward. When the upper gate plate 7 is about to move downward into place, the lower pressure frame 43 contacts the two rebound sliders 44 of the same group and pushes them downward, and the two rebound sliders 44 move downward When the push frame 46 is in motion, the two connecting rods 45 drive the push frame 46 to move in the direction away from the lower gate plate 8. In the process of moving in the direction away from the lower gate plate 8, the push frame 46 first pushes the rotating plate 48 through its top to turn the rotating plate 48 over. During the turning process of the rotating plate 48, it contacts the limit rod 49, and the limit rod 49 abuts against the rotating plate 48 to stop the turning of the rotating plate 48. At this time, the rotating plate 48 and the sliding seat 47 set as a U-shaped form a plane. At this time, the push frame 46 contacts the sliding seat 47, and the push frame 46 continues to move in the direction away from the lower gate plate 8. The push frame 46 pushes the sliding seat 47 and the rotating plate 48 in the direction away from the lower gate plate 8. When the rotating plate 48 turns over, the attachments on its surface are turned over between the rotating plate 48 and the inner wall of the mounting box 41. The rotating plate 48 and the sliding seat 47 are When the plane formed by the upper gate plate 7 moves in the direction away from the lower gate plate 8, it squeezes the attachments in the direction close to the drainage hole 410. Since the attachments usually have a high water content, the scraped attachments are usually in a state similar to fluid. After being squeezed by the rotating plate 48 and the slide seat 47, the attachments flow into the collection box 411 through the drainage hole 410. The check valve in the drainage hole 410 can prevent the attachments from flowing back. The staff can clean the collection box 411 regularly. After the upper gate plate 7 moves upward, the lower pressure frame 43 moves upward and breaks away from the contact with the two rebound sliders 44. The rebound slider 44 is reset by the elastic force of the reset spring and drives the push frame 46 to reset through the connecting rod 45. The slide seat 47 is also reset by the elastic force of the reset spring. After the slide 47 is reset, the rotating plate 48 is reset by gravity rotation; through the setting of the two cleaning devices 4, when the two lower gates 8 are opened, the two scrapers 42 respectively scrape off the attachments on the surfaces of the two lower gates 8, so as to avoid the lower gates 8 from accumulating a lot of attachments on the surface and agglomerating after long-term use, which affects the fit between the movable valve seat 13 and the sealing performance; through the cooperation of the slide 47 and the rotating plate 48, the rotating plate 48 can catch the attachments scraped off the lower gate 8. When the lower gate 8 is closed downward, the rotating plate 48 can be turned over, and through the cooperation with the slide 47, the attachments are discharged into the collection box 411 through the drain hole 410, which is convenient for the staff to clean and avoid the attachments from accumulating in the valve body 1.

[0048] When the ice breaker 55 is in the closed position, the ice breaker 51 will move forward and the ice breaker 51 will move backward. The ice layer on the surface of the lower gate plate 8 is broken, and the ice layer on the surface of the lower gate plate 8 falls off. After that, the resistance rod 51 is out of contact with the inner sliding rod 53, and the inclined top block 57 drives the inner sliding rod 53 to reset through the elastic force of the reset spring, and the two ice-breaking plates 55 are reset by the elastic force of the two spring pieces 58. The two ice-breaking plates 55 and the surface of the lower gate plate 8 form a plane again. The two ice-breaking plates 55 are only flipped outward when the lower gate plate 8 is opened upward, and are reset immediately after flipping, so as to avoid affecting the movement trajectory of the lower gate plate 8; through the arrangement of the two ice-breaking devices 5, when the two lower gate plates 8 are opened upward, the two ice-breaking plates 55 on the lower gate plate 8 will break the ice layer by flipping outward, so that the ice layer on the lower gate plate 8 falls off, avoiding the lower gate plate 8 from generating a large friction force due to the ice layer attached to itself when moving upward, increasing the operating pressure of the valve stem 6 and the driving member, and generating the risk of the valve stem 6 breaking and the driving member being damaged.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A large-flux flat gate valve, comprising a valve body (1), characterized in that: The top of the valve body (1) is connected to a valve cover (2), a valve stem (6) is slidably mounted on the top of the valve cover (2), the bottom of the valve stem (6) is located in the valve body (1), the bottom of the valve stem (6) is connected to an upper gate plate (7), the bottom of the upper gate plate (7) is slidably connected to two lower gate plates (8), the two lower gate plates (8) are arranged in a mirror image, two mounting seats (9) are mounted on the inner wall of the valve body (1), the mounting seats (9) are connected to rubber blocks (10), the two rubber blocks (10) are respectively located on the left and right sides of the lower gate plate (8), the lower gate plate The left and right sides of the lower gate plate (8) are respectively connected with inclined plane blocks (11), and the two inclined plane blocks (11) on both sides of the same lower gate plate (8) are respectively in contact with the two rubber blocks (10) when moving. The front and rear sides of the valve body (1) are respectively provided with water holes, and a fixing ring (12) is installed in the water hole of the valve body (1). The inner side of the fixing ring (12) is slidably connected with a movable valve seat (13), and a rubber ring (14) is sleeved between the movable valve seat (13) and the fixing ring (12). The two lower gate plates (8) are respectively in contact with the two movable valve seats (13) when moving; It also includes an anti-deposition device (3) for preventing sediment from being deposited inside the valve body (1); the anti-deposition device (3) is arranged inside the valve body (1); A cleaning device (4) for cleaning the surface of the lower gate plate (8), wherein two cleaning devices (4) are provided, and the two cleaning devices (4) are respectively provided on the inner walls of the front and rear sides of the valve body (1); An ice-breaking device (5) for breaking ice layers attached to the surface of the lower gate plate (8), wherein two ice-breaking devices (5) are provided, and the two ice-breaking devices (5) are respectively provided on the two lower gate plates (8); The ice breaking device (5) comprises an inner slide rod (53), a mounting groove (52) is provided on the lower gate plate (8), the inner slide rod (53) is slidably mounted in the mounting groove (52), a mounting shaft (54) is installed in the mounting groove (52), and two ice breaking plates (55) are rotatably mounted on the outer wall of the mounting shaft (54).

2. The large flux flat gate valve according to claim 1, characterized in that: The anti-deposition device (3) comprises two connecting frames (31), both of which are mounted on the upper gate plate (7), a pull rod (32) is connected to the connecting frame (31), an end is provided at the bottom of the pull rod (32), the two pull rods (32) are respectively located on the left and right sides of the upper gate plate (7), and a movable cover (33) is slidably mounted inside the valve body (1).

3. The large flux flat gate valve according to claim 2, characterized in that: The middle part of the movable cover (33) is arranged in an arc shape, and sliding holes are arranged at both ends of the movable cover (33). The two pull rods (32) are respectively slidably connected with the two sliding holes of the movable cover (33), and the end of the bottom of the pull rod (32) contacts the bottom of the movable cover (33) during the movement. The movable cover (33) is located below the two lower gate plates (8), and the top surface of the movable cover (33) coincides with the two movable valve seats (13) during the movement.

4. The large flux flat gate valve according to claim 3 is characterized in that: A plurality of slide grooves are provided on the top surface of the movable cover (33); an inner slide plate (34) is slidably installed inside the movable cover (33); a plurality of protrusions (35) are connected to the inner slide plate (34); the plurality of protrusions (35) are respectively slidably connected to the plurality of slide grooves on the top surface of the movable cover (33); a rotating shaft (36) is rotatably installed inside the movable cover (33); a water wheel (37) is rotatably connected to the top end of the rotating shaft (36); an arc block (38) is connected to the outer wall of the rotating shaft (36); a long groove is provided at the center of the inner slide plate (34); the rotating shaft (36) is located in the long groove of the inner slide plate (34); and when the rotating shaft (36) rotates, it slides in contact with the edge of the long groove of the inner slide plate (34).

5. The large flux flat gate valve according to claim 4, characterized in that: The cleaning device (4) comprises a mounting box (41), the mounting box (41) being mounted on the inner wall of the valve body (1), a scraper (42) being mounted in the mounting box (41), and the two scrapers (42) of the two cleaning devices (4) respectively contact the surface of the lower gate plate (8).

6. The large flux flat gate valve according to claim 5, characterized in that: The cleaning device (4) further comprises a collecting box (411), wherein the two collecting boxes (411) are respectively mounted on the outer walls of the valve body (1) on the front and rear sides, and the mounting box (41) is slidably mounted with two rebound sliders (44) near the outer wall edge of the lower gate plate (8). A return spring is arranged between the rebound slider (44) and the mounting box (41), and the two rebound sliders (44) on the same mounting box (41) are arranged as a group. A lower pressure frame (43) is installed. The two lower pressure frames (43) are in contact with two groups of rebound sliders (44) on the two installation boxes (41) respectively during movement. The bottom of the rebound slider (44) is hinged with a connecting rod (45). A push frame (46) and a slide seat (47) are slidably installed in the installation box (41). The slide seat (47) is a U-shaped setting. A rotating plate (48) is rotatably connected to the slide seat (47). A limit rod (49) is installed on the slide seat (47).

7. The large flux flat gate valve according to claim 6, characterized in that: One end of the two connecting rods (45) away from the rebound slider (44) is hinged to the push frame (46), the rotating plate (48) is in sliding contact with the top of the push frame (46), the push frame (46) is in contact with the slide seat (47) during movement, and the rotating plate (48) is in contact with the limit rod (49) during movement. A plurality of return springs are arranged between the slide seat (47) and the inner wall of the installation box (41). A drain hole (410) is provided on the inner wall of the installation box (41) away from the lower gate plate (8). The drain hole (410) passes through the connecting valve body (1) and the collecting box (411), and a check valve is arranged inside the drain hole (410).

8. The large flux flat gate valve according to claim 7, characterized in that: The two ice crushing plates (55) are arranged in a mirror image. A curved surface block (56) is connected to the side of the ice crushing plate (55) facing the mounting groove (52). An inclined top block (57) is slidably mounted in the mounting groove (52). The inclined top block (57) is connected to the inner sliding rod (53). A return spring is connected between the inclined top block (57) and the mounting groove (52). When the inclined top block (57) moves, it is in sliding contact with the two curved surface blocks (56). A spring piece (58) is connected between the ice crushing plate (55) and the mounting groove (52).

9. The large flux flat gate valve according to claim 8, characterized in that: Two abutment rods (51) are installed on the inner wall of the valve body (1), and one end of the inner slide rod (53) away from the installation groove (52) is arranged as an arc-shaped end. The arc-shaped ends of the two inner slide rods (53) of the two ice-breaking devices (5) respectively slide in contact with the two abutment rods (51) during movement.

Images