A flat gate valve with self-flushing structure

Abstract

The present invention discloses a flat gate valve with a self-flushing structure, which relates to the field of flat gate valves and comprises a valve body, a water inlet pipe is arranged on the left upper part of the valve body, a water outlet pipe is arranged on the right upper part of the valve body, a cylinder is arranged on the top of the valve body, a cover is arranged on the top of the cylinder, a lifting assembly is arranged inside the cover, a gate plate is arranged at the bottom of the lifting assembly, the gate plate and the valve body are connected with each other, a filter is arranged at the bottom of the gate plate, a circular plate is arranged on the left upper part of the gate plate, an adjusting assembly is arranged on the top of the circular plate, a first straight rod is arranged on the rear side of the adjusting assembly, a pneumatic assembly is arranged on the rear side of the first straight rod, the pneumatic assembly is located inside the gate plate, and through the cooperation of the circular plate and the nozzle and the gradually increasing flushing force, on the one hand, the accumulated impurities can be completely flushed away, and on the other hand, the overall cleanliness of the filter can be ensured to remain consistent.

Description

Technical Field

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

[0002] The flat gate valve is a sliding valve with a parallel gate as the closing part. There are two main types of flat gate valves: flat gate valve without diversion holes and flat gate valve with diversion holes. Flat gate valves are suitable for natural gas, petroleum, chemical, environmental protection, urban pipelines, gas pipelines and other pipelines, venting systems and steam storage devices, as opening and closing equipment.

[0003] Among them, the Chinese patent document with patent application number CN200920122880.4 discloses a self-flushing flat gate valve, including a valve body, a gate, a valve seat, a valve stem, a valve cover, a bracket, and a handwheel. The lower end of the gate is provided with a guide hole, which is characterized in that: the guide hole on the gate is semicircular in shape, the notch of the guide hole faces the groove at the bottom of the valve body, and the two sides of the bottom end of the gate are respectively formed with chamfers, and a transition surface is formed between the chamfer and the bottom edge of the guide hole, and the transition surface is lower than the center line of the guide hole itself. By implementing the utility model, the fluid medium passing through the valve is used to realize the function of automatically flushing the inside of the valve body and automatically removing debris from the valve cavity, which ensures that the flat gate valve works with high performance and long life in a wider range.

[0004] However, during use, some impurities may exist in the liquid, which may cause the filter inside the flat gate valve to be blocked, thereby reducing the amount of liquid delivered and the efficiency of liquid delivery. The impurities on the surface of the filter cannot be removed, and the dirt and impurities after cleaning are not convenient to discharge. Workers are required to manually disassemble the valve, affecting the efficiency of material transmission. In addition, during the process of discharging dirt, the sewage outlet may be blocked by dirt, further reducing the efficiency of the device.

[0005] Therefore, the present invention provides a flat gate valve with a self-flushing structure to solve the above problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a flat gate valve with a self-flushing structure, which effectively solves the blockage of the internal filter of the flat gate valve, reduces the efficiency of liquid transportation, and cannot remove impurities on the surface of the filter. It is inconvenient to discharge the cleaned dirt and impurities, and workers are required to manually disassemble the valve. In the process of discharging the dirt, the problem of dirt clogging the sewage outlet will occur.

[0007] To achieve the above object, the present invention provides the following technical solution: the present invention comprises a valve body, a water inlet pipe is provided on the left upper part of the valve body, a water outlet pipe is provided on the right upper part of the valve body, a cylinder is provided on the top of the valve body, a cover is provided on the top of the cylinder, a lifting assembly is provided inside the cover, a gate is provided at the bottom of the lifting assembly, the gate is connected to the valve body, and a filter is provided at the bottom of the gate;

[0008] A circular plate is provided on the left side of the top of the gate plate, an adjusting assembly is provided on the top of the circular plate, a first straight rod is provided on the rear side of the adjusting assembly, a pneumatic assembly is provided on the rear side of the first straight rod, the pneumatic assembly is located inside the gate plate, a right-angle rod is provided at the bottom of the pneumatic assembly, a nozzle is provided at the bottom of the right-angle rod, the nozzle and the gate plate are connected to each other, a slide groove is provided on the left side of the nozzle, the right-angle rod and the slide groove are connected to each other, a first water pipe is provided at the bottom of the circular plate, the first water pipe is located inside the gate plate, a second water pipe is provided at the bottom of the first water pipe, and the bottom of the second water pipe is connected to the nozzle;

[0009] A control component is provided inside the valve body, a cross bar is provided at the bottom of the control component, an elastic cleaning brush is provided on the inner side of the cross bar, the inner side of the elastic cleaning brush contacts the gate plate, a sewage discharge component is provided at the bottom of the cross bar, a blocking block is provided at the bottom of the sewage discharge component, a circular hole is provided at the bottom of the valve body, and the blocking block is connected to the circular hole.

[0010] Preferably, the lifting assembly includes a rotary handle, the rotary handle is connected to the cover body, a first bevel gear is provided on the inner side of the rotary handle, and a second bevel gear is provided on the top of the first bevel gear.

[0011] Preferably, a threaded ring is provided inside the second bevel gear, a supporting plate is provided at the bottom of the threaded ring, the outer side of the supporting plate is connected to the cover body, a threaded rod is provided inside the threaded ring, a protrusion is provided at the bottom of the threaded rod, the bottom of the protrusion is connected to the gate plate, and a through hole is provided on the top of the cover body.

[0012] Preferably, the adjustment assembly includes a passive bevel gear, the passive bevel gear is connected to the top of the circular plate, an active bevel gear is provided on the right side of the passive bevel gear, and the active bevel gear is rotatably connected to the gate plate.

[0013] Preferably, a first gear is provided on the right side of the active bevel gear, a rack is provided at the bottom of the first gear, an electric telescopic rod is provided at the front end of the rack, the electric telescopic rod is located inside the gate plate, and the rear side of the rack is connected to the front end of the first straight rod.

[0014] Preferably, the pneumatic assembly includes a first piston plate, a front end of the first piston plate is interconnected with the first straight rod, a first cylinder is provided on the outer side of the first piston plate, the first cylinder is interconnected with the gate plate, and a connecting pipe is connected to the rear side of the first cylinder.

[0015] Preferably, the bottom of the connecting pipe is connected to a second cylinder, the second cylinder is connected to the gate plate, a second piston plate is provided inside the second cylinder, a second straight rod is provided at the bottom of the second piston plate, and the bottom of the second straight rod is connected to the right-angle rod.

[0016] Preferably, the control component includes a first electric push rod and a second electric push rod, both of which are located inside the gate plate, a groove is provided at the front end of the cross bar, and the bottom of the first electric push rod is connected to the groove.

[0017] Preferably, the sewage discharge assembly includes a connecting rod, the connecting rod is connected to the cross rod, a clamping rod is provided at the bottom of the connecting rod, a vertical rod is provided at the top of the blocking block, and the vertical rod is connected to the clamping rod.

[0018] Preferably, a cross body is provided at the top of the vertical rod, a plurality of springs are arranged circumferentially on the outer bottom of the cross body, and the bottom of the springs is connected to the bottom of the valve body.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention can control the circular plate to open gradually through the adjustment component. As the flipping angle of the circular plate gradually increases, the flow rate of the liquid sprayed from the nozzle increases, the greater the flow rate, the greater the kinetic energy, and the stronger the impact force of the liquid. Through the cooperation of the circular plate and the nozzle, it can be ensured that the upward spray speed of the nozzle is small, which can meet the flushing of a small amount of impurities. As the nozzle continues to rotate downward, the amount of liquid sprayed increases and the flow rate becomes faster, which can flush the impurities accumulated at the bottom. By gradually increasing the flushing force, on the one hand, the accumulated impurities can be completely flushed away, and on the other hand, the overall cleanliness of the filter can be ensured to remain consistent.

[0021] 2. During the flushing process of the filter, the first electric push rod and the second electric push rod are synchronously extended to drive the elastic cleaning brush to scrub the filter from top to bottom, and the left side of the filter is scrubbed by the elastic cleaning brush. The impurities entangled on the surface of the filter can be cleaned by the flushing of the nozzle. The first electric push rod is controlled to extend intermittently and quickly, thereby driving the cross bar and the elastic cleaning brush to rotate, thereby forming an angle with the horizontal filter wire to ensure the scrubbing effect of the elastic cleaning brush on the filter.

[0022] 3. After the filter screen is cleaned, the first electric push rod and the second electric push rod are controlled to reciprocate and extend, driving the cross bar and the elastic cleaning brush to move and swing back and forth. Relying on the impact force of the internal liquid, the elastic cleaning brush is flushed to ensure the cleanliness of the elastic cleaning brush itself, and the elastic cleaning brush is driven to clean the step at the bottom of the valve body (that is, the area where the gate is at the lowest point) to prevent the flat gate valve from being closed tightly due to impurities at the bottom when closing the flat gate valve next time, resulting in water leakage.

[0023] 4. Control the first electric push rod and the second electric push rod to continue to move downward to the bottom, so that the card rod and the vertical rod contact each other, push the blockage downward, so that the remaining liquid in the valve body can be discharged. If there are many impurities in the discharge process, control the first electric push rod to extend alone, drive the cross bar to swing, thereby mobilizing the cross body and the vertical rod to swing, and realize the reciprocating movement and swinging of the vertical rod in the through hole at the bottom of the valve body, thereby solving the blockage and ensuring the efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention.

[0026] Figure 3 It is a left side view of the overall structure section of the present invention.

[0027] Figure 4 It is a rear cross-sectional view of the overall structure of the present invention.

[0028] Figure 5 It is a schematic diagram of the matching structure of the rotary handle and the protrusion of the present invention.

[0029] Figure 6 This is a schematic diagram of the cooperation structure between the first electric push rod, the second electric push rod and the cross bar of the present invention.

[0030] Figure 7 It is a schematic diagram of the matching structure of the clamping rod and the vertical rod of the present invention.

[0031] Figure 8 It is a schematic diagram of the matching structure of the circular plate and the gate plate of the present invention.

[0032] Fig. 9 It is a schematic diagram of the matching structure of the circular plate and the nozzle of the present invention.

[0033] Fig.10 For the present invention Fig. 9 A partial enlarged schematic diagram of part A in the middle.

[0034] Fig.11It is a schematic diagram of the matching structure of the connecting pipe and the nozzle of the present invention.

[0035] Fig.12 It is a schematic diagram of the exploded coordination of the first water delivery pipe and the nozzle of the present invention.

[0036] Numbers in the figure: 101, cover; 102, cylinder; 103, valve body; 104, water outlet pipe; 105, water inlet pipe; 201, rotary handle; 202, first bevel gear; 203, support plate; 204, second bevel gear; 205, threaded ring; 206, threaded rod; 207, bump; 208, gate; 209, filter; 301, first electric push rod; 302, second electric push rod; 303, cross bar; 304, elastic cleaning brush; 305, groove; 306, connecting rod; 307, clamping rod; 308, vertical rod; 309, cross body; 310, spring; 311, block; 401, round plate; 402, electric telescopic rod; 403, rack; 404, first gear; 405, active bevel gear; 406, passive bevel gear; 501, first straight rod; 502, first piston plate; 503, first cylinder; 504, connecting pipe; 505, second cylinder; 506, second piston plate; 507, second straight rod; 508, right-angle rod; 509, slide; 510, nozzle; 511, first water pipe; 512, second water pipe. DETAILED DESCRIPTION

[0037] The following will refer to the attached Figures 1 to 12 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. Example

[0038] Depend on Figure 1-Figure 12The present invention proposes a flat gate valve with a self-flushing structure: the present invention comprises a valve body 103, which is relatively large and convenient for control in a large pipeline system; an inlet pipe 105 is arranged on the upper left side of the valve body 103, the outer side of the inlet pipe 105 is connected to the water inlet system, which is connected by a plurality of screws and gaskets to prevent liquid overflow; an outlet pipe 104 is arranged on the upper right side of the valve body 103, the outer side of the outlet pipe 104 is connected to the water outlet system, which is connected by a plurality of screws and gaskets to ensure the sealing of the pipeline connection; a cylinder body 102 is arranged on the top of the valve body 103, the valve body 103 is connected to the bottom of the cylinder body 102 by a plurality of screws, a cover body 101 is arranged on the top of the cylinder body 102, and a lifting group is arranged inside the cover body 101 A gate plate 208 is provided at the bottom of the lifting assembly, and the gate plate 208 can be driven to lift and reciprocate through the lifting assembly. The gate plate 208 is connected to the valve body 103, and the gate plate 208 can be lifted and lowered inside the valve body 103. A filter screen 209 is provided at the bottom of the gate plate 208, and a circular through hole is provided in the middle of the gate plate 208. The filter screen 209 can filter the liquid flowing in the circular through hole to prevent excessive impurities in the liquid from clogging the subsequent pipeline system. When the gate plate 208 is at the bottom inside the valve body 103, the surface of the upper end of the gate plate 208 can block the inner side of the water inlet pipe 105. When the gate plate 208 moves upward, the circular through hole in the middle of the gate plate 208 is aligned with the water inlet pipe 105, and the liquid can flow at this time and be discharged from the outlet pipe 104.

[0039] A circular plate 401 is provided on the left side of the top of the gate 208, and an adjusting component is provided on the top of the circular plate 401. The circular plate 401 is in a closed state at ordinary times to prevent liquid from entering the inside of the gate 208. The opening and closing angle of the circular plate 401 can be controlled by the adjusting component, so as to control the flow rate of liquid entering the gate 208. A first straight rod 501 is provided on the rear side of the adjusting component, and the adjusting component can drive the first straight rod 501 to move back and forth. A pneumatic component is provided on the rear side of the first straight rod 501, and the pneumatic component is located inside the gate 208. The first straight rod 501 drives the pneumatic component to operate. A right-angle rod 508 is provided at the bottom of the pneumatic component, and a nozzle 510 is provided at the bottom of the right-angle rod 508. The nozzle 510 is connected to the gate 208. A slide groove 509 is provided on the left side of the nozzle 510, and the right-angle rod 508 and the slide groove 509 are connected to each other. The pneumatic assembly can drive the right-angle rod 508 to move downward as the first straight rod 501 moves backward. A cylindrical protrusion is provided at the bottom of the right-angle rod 508, which can be slidably connected to the slide groove 509 in the nozzle 510. The rear side of the nozzle 510 is rotatably connected to the valve body 103. When the right-angle rod 508 moves downward, it will drive the nozzle 510 to rotate downward, thereby changing the spray angle of the nozzle 510. A first water pipe 511 is provided at the bottom of the circular plate 401. The right side of the circular plate 401 has a circular cavity. The circular plate 401 opens the liquid to enter the circular cavity. The first water pipe 511 is located inside the gate plate 208. A second water pipe 512 is provided at the bottom of the first water pipe 511. The bottom of the second water pipe 512 is connected to the nozzle 510. The liquid is input into the interior of the nozzle 510 through the first water pipe 511 and the second water pipe 512.

[0040] Specifically, when there are impurities on the surface of the filter 209, the flow efficiency of the liquid is affected. At this time, the gate plate 208 is controlled to descend, and the flat gate valve is closed. The circular plate 401 can be controlled to gradually open through the adjustment component. As the flip angle of the circular plate 401 gradually increases, the liquid flow inside the first water pipe 511 and the second water pipe 512 increases. Since the pipe volumes of the first water pipe 511 and the second water pipe 512 remain unchanged, the larger the flip angle of the circular plate 401, the greater the flow rate of the liquid sprayed by the nozzle 510. Since the shape of the filter 209 is circular and vertical, That is to say, there is less impurities on the top of the filter 209. As the top of the filter 209 is flushed, the impurities gradually move downward and accumulate at the bottom. Through the cooperation of the circular plate 401 and the nozzle 510, it can be ensured that the upward spray speed of the nozzle 510 is relatively small, which can meet the flushing of a small amount of impurities. As the nozzle 510 continues to rotate downward, the amount of liquid sprayed increases and the flow rate becomes faster, which can flush out the impurities accumulated at the bottom. By gradually increasing the flushing force, on the one hand, the accumulated impurities can be completely flushed away, and on the other hand, the overall cleanliness of the filter 209 can be ensured to remain consistent.

[0041] The lifting assembly includes a handle 201, which is connected to the cover body 101 and is rotatably connected to the cover body 101. A first bevel gear 202 is provided on the inner side of the handle 201, and a second bevel gear 204 is provided on the top of the first bevel gear 202. The rotation of the handle 201 drives the fixedly connected first bevel gear 202 to rotate, and the first bevel gear 202 drives the meshing second bevel gear 204 to rotate in the opposite direction.

[0042] A threaded ring 205 is provided inside the second bevel gear 204, and the rotation of the second bevel gear 204 can drive the internal threaded ring 205 to rotate. A supporting plate 203 is provided at the bottom of the threaded ring 205, and the threaded ring 205 is rotatably connected to the top of the supporting plate 203. The outer side of the supporting plate 203 is connected to the cover body 101, and the supporting plate 203 is fixedly connected to the inner wall of the cover body 101. A threaded rod 206 is provided inside the threaded ring 205, and the rotation of the threaded ring 205 can drive the threaded rod 206 to move up and down. A protrusion 207 is provided at the bottom of the threaded rod 206, and the bottom of the protrusion 207 is connected to the gate plate 208. A through hole is provided at the top of the cover body 101, and the threaded rod 206 drives the protrusion 207 to rise and fall, and the protrusion 207 drives the gate plate 208 to rise and fall synchronously, so as to realize the opening and closing of the valve, and the threaded rod 206 can extend from the top of the cover body 101.

[0043] The regulating assembly comprises a passive bevel gear 406, which is interconnected with the top of the circular plate 401, an active bevel gear 405 is arranged on the right side of the passive bevel gear 406, and the active bevel gear 405 is rotatably connected with the gate plate 208, a first gear 404 is arranged on the right side of the active bevel gear 405, a rack 403 is arranged at the bottom of the first gear 404, an electric telescopic rod 402 is arranged at the front end of the rack 403, the electric telescopic rod 402 is located inside the gate plate 208, the rear side of the rack 403 is interconnected with the front end of the first straight rod 501, the electric telescopic rod 402 can be freely extended and retracted, and when the electric telescopic rod 402 is extended, it will drive the fixedly connected rack 403 to move backward, the rack 403 drives the first gear 404 meshed at the top to rotate, the first gear 404 drives the active bevel gear 405 to rotate, and the active bevel gear 405 drives the meshed passive bevel gear 406 to rotate in the opposite direction, thereby realizing the opening and closing of the circular plate 401 and completing the regulation of the liquid flushing flow.

[0044] The pneumatic assembly includes a first piston plate 502, the front end of the first piston plate 502 is connected to the first straight rod 501, the outer side of the first piston plate 502 is provided with a first cylinder 503, the first cylinder 503 is connected to the gate plate 208, the movement of the first straight rod 501 can drive the first piston plate 502 to move back and forth inside the first cylinder 503, the rear side of the first cylinder 503 is connected to a connecting pipe 504, the first piston plate 502 moves to the rear side to squeeze the gas inside the first cylinder 503 into the interior of the connecting pipe 504, the bottom of the connecting pipe 504 is connected to The second cylinder 505, the high-pressure gas enters the interior of the second cylinder 505 through the connecting pipe 504, the second cylinder 505 is connected to the gate plate 208, a second piston plate 506 is provided inside the second cylinder 505, a second straight rod 507 is provided at the bottom of the second piston plate 506, the bottom of the second straight rod 507 is connected to the right-angle rod 508, as the gas inside the second cylinder 505 increases, the air pressure begins to increase, which will push the second piston plate 506 to move downward inside the second cylinder 505, and push the second straight rod 507 and the right-angle rod 508 to move downward synchronously. Example

[0045] On the basis of Example 1, this embodiment takes into account that the device may not be cleaned thoroughly if it only uses high-pressure water, and the filter 209 can be cleaned by an elastic cleaning brush 304. However, after use, impurities may accumulate or entangle on the surface of the elastic cleaning brush 304, and the cleaned dirt and impurities are not convenient to discharge, requiring workers to manually disassemble the valve, and during the process of discharging the dirt, the sewage outlet may be blocked by dirt.

[0046] Specifically, a control assembly is provided inside the valve body 103, a cross bar 303 is provided at the bottom of the control assembly, an elastic cleaning brush 304 is provided on the inner side of the cross bar 303, and the elastic cleaning brush 304 is composed of a plurality of elastic bristles. When the cross bar 303 is at the highest point, the inner side of the elastic cleaning brush 304 and the gate plate 208 are in conflict with each other, and the elastic cleaning brush 304 is in a bent state at this time. When the cross bar 303 moves downward and begins to gradually align with the through hole at the bottom of the gate plate 208, the bristles of the elastic cleaning brush 304 are in the elastic state. Under the action of, it returns to a non-bending state, and the surface of the filter screen 209 can be brushed. A sewage discharge component is provided at the bottom of the cross bar 303, and a blocking block 311 is provided at the bottom of the sewage discharge component. A circular hole is provided at the bottom of the valve body 103, and the blocking block 311 is connected to the circular hole. In the normal state, the blocking block 311 is aligned with the circular hole at the bottom of the valve body 103 to ensure that there will be no leakage. When it is necessary to discharge dirt, the control component cooperates with each other to push the blocking block 311 downward to facilitate the discharge of impurities at the bottom of the valve body 103.

[0047] The control assembly includes a first electric push rod 301 and a second electric push rod 302. The lengths of the first electric push rod 301 and the second electric push rod 302 can be freely extended. The first electric push rod 301 and the second electric push rod 302 are both located inside the gate plate 208. The first electric push rod 301 and the second electric push rod 302 are fixedly connected to the inside of the valve body 103. The front end of the cross bar 303 is provided with a groove 305. The bottom of the first electric push rod 301 and the bottom of the second electric push rod 302 are connected to each other. They are all equipped with cylindrical pins, which can be connected to the cross bar 303. The cylindrical pin at the bottom of the first electric push rod 301 can be slidably connected to the groove 305. When the first electric push rod 301 and the second electric push rod 302 are synchronously extended and retracted, the cross bar 303 can be driven to rise and fall. When the length of the second electric push rod 302 remains unchanged, the extension and retraction of the first electric push rod 301 can drive the cross bar 303 to swing. The moving trajectory is centered at the hinge point of the second electric push rod 302 and the cross bar 303, and the length of the cross bar 303 is the radius for circular deflection.

[0048] The sewage discharge assembly includes a connecting rod 306, which is connected to the cross rod 303. A clamping rod 307 is provided at the bottom of the connecting rod 306. The shape of the clamping rod 307 is relatively special. A vertical rod 308 is provided at the top of the blocking block 311. The top of the vertical rod 308 is provided with a depression corresponding to the shape of the clamping rod 307. The vertical rod 308 and the clamping rod 307 are connected to each other. A cross body 309 is provided at the top of the vertical rod 308. A plurality of springs 310 are arranged on the circumference of the outer bottom of the cross body 309. The bottom of the spring 310 is connected to the bottom of the valve body 103. The four springs 310 can exert an upward elastic force on the cross body 309, thereby ensuring that the blocking block 311 is tightly connected to the valve body 103 under normal conditions.

[0049] During use: the middle through hole of the gate plate 208 is aligned with the water inlet pipe 105. At this time, the filter screen 209 can filter the liquid transported inside the water inlet pipe 105. As the use time increases, impurities will accumulate on the left side of the filter screen 209, resulting in a decrease in the transmission efficiency of the liquid. At this time, the gate plate 208 is controlled to move downward to close the flat gate valve. The circular plate 401 can be controlled to gradually open through the adjustment component. As the flip angle of the circular plate 401 gradually increases, the flow rate of the liquid sprayed by the nozzle 510 increases. The greater the flow rate, the greater the kinetic energy, and the stronger the impact force of the liquid. Through the cooperation of the circular plate 401 and the nozzle 510, it can be ensured that the upward spray speed of the nozzle 510 is small, which can meet the flushing of a small amount of impurities. As the nozzle 510 continues to rotate downward, the amount of liquid sprayed increases and the flow rate becomes larger, which can flush the impurities accumulated at the bottom. By gradually increasing the flushing force, on the one hand, the accumulated impurities can be completely flushed away, and on the other hand, the overall cleanliness of the filter screen 209 can be ensured to remain consistent.

[0050] During the flushing process of the filter 209, the first electric push rod 301 and the second electric push rod 302 are synchronously extended to first drive the elastic cleaning brush 304 to brush the filter 209 from top to bottom, and the left side of the filter 209 is brushed by the elastic cleaning brush 304. The impurities entangled on the surface of the filter 209 can be cleaned with the flushing of the nozzle 510. However, the vertical movement of the cross bar 303 and the elastic cleaning brush 304 can only brush the vertical wire of the filter 209. Dirt will still be entangled on the horizontal surface of the filter 209. During the simultaneous extension of the first electric push rod 301 and the second electric push rod 302, the first electric push rod 301 can be controlled to extend intermittently and quickly, thereby driving the cross bar 303 and the elastic cleaning brush 304 to rotate, thereby forming an angle with the horizontal wire of the filter 209 to ensure the brushing effect of the elastic cleaning brush 304 on the filter 209.

[0051] After the filter screen 209 is cleaned, the gate plate 208 is controlled to move upward so that the flat gate valve continues to be in a connected state for liquid transportation. The cleaned liquid is accumulated inside the valve body 103. At this time, the first electric push rod 301 and the second electric push rod 302 are controlled to reciprocate and extend, or in the process of the first electric push rod 301 and the second electric push rod 302 extending at the same time, the first electric push rod 301 is controlled to extend intermittently and quickly, thereby driving the cross bar 303 and the elastic cleaning brush 304 to move and swing back and forth, relying on the impact force of the internal liquid to flush the elastic cleaning brush 304 to ensure the cleanliness of the elastic cleaning brush 304 itself. With the extension of the first electric push rod 301 and the second electric push rod 302, the elastic cleaning brush 304 can be driven to the step at the bottom of the valve body 103 (that is, the area where the gate plate 208 is at the lowest point), and the area can be cleaned to prevent the flat gate valve from being not closed tightly due to impurities at the bottom when the flat gate valve is closed next time, resulting in water leakage.

[0052] Then, the first electric push rod 301 and the second electric push rod 302 are controlled to continue to move downward to the bottom, so that the locking rod 307 and the vertical rod 308 contact each other, and the blocking block 311 is pushed downward, so that the remaining liquid in the valve body 103 can be discharged. If there are too many impurities in the discharge process, the bottom hole of the valve body 103 will be blocked. The first electric push rod 301 is controlled to extend alone again to drive the cross bar 303 to swing, thereby mobilizing the cross body 309 and the vertical rod 308 to swing, and then the first electric push rod 301 and the second electric push rod 302 are extended synchronously to realize the reciprocating movement and swinging of the vertical rod 308 in the bottom hole of the valve body 103, thereby solving the blockage problem and ensuring the efficiency of the device.

[0053] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A flat gate valve with a self-flushing structure, characterized in that: It comprises a valve body (103), a water inlet pipe (105) is provided on the left upper part of the valve body (103), a water outlet pipe (104) is provided on the right upper part of the valve body (103), a cylinder (102) is provided on the top of the valve body (103), a cover (101) is provided on the top of the cylinder (102), a lifting assembly is provided inside the cover (101), a gate plate (208) is provided at the bottom of the lifting assembly, the gate plate (208) and the valve body (103) are connected to each other, and a filter screen (209) is provided at the bottom of the gate plate (208); A circular plate (401) is provided on the left side of the top of the gate plate (208); an adjustment assembly is provided on the top of the circular plate (401); a first straight rod (501) is provided on the rear side of the adjustment assembly; a pneumatic assembly is provided on the rear side of the first straight rod (501); the pneumatic assembly is located inside the gate plate (208); a right-angle rod (508) is provided at the bottom of the pneumatic assembly; a nozzle (510) is provided at the bottom of the right-angle rod (508); the nozzle (510) is connected to the gate plate ( 208) are interconnected, a slide groove (509) is provided on the left side of the nozzle (510), the right-angle rod (508) and the slide groove (509) are interconnected, a first water pipe (511) is provided at the bottom of the circular plate (401), the first water pipe (511) is located inside the gate plate (208), a second water pipe (512) is provided at the bottom of the first water pipe (511), and the bottom of the second water pipe (512) is communicated with the nozzle (510); A control component is provided inside the valve body (103), a cross bar (303) is provided at the bottom of the control component, an elastic cleaning brush (304) is provided on the inner side of the cross bar (303), the inner side of the elastic cleaning brush (304) is in contact with the gate plate (208), a sewage discharge component is provided at the bottom of the cross bar (303), a blocking block (311) is provided at the bottom of the sewage discharge component, a circular hole is provided at the bottom of the valve body (103), and the blocking block (311) and the circular hole are connected to each other.

2. A flat gate valve with a self-flushing structure according to claim 1, characterized in that: The lifting assembly comprises a rotary handle (201), the rotary handle (201) being connected to the cover body (101), a first bevel gear (202) being provided on the inner side of the rotary handle (201), and a second bevel gear (204) being provided on the top of the first bevel gear (202).

3. A flat gate valve with a self-flushing structure according to claim 2, characterized in that: A threaded ring (205) is provided inside the second bevel gear (204), a supporting plate (203) is provided at the bottom of the threaded ring (205), the outer side of the supporting plate (203) is connected to the cover body (101), a threaded rod (206) is provided inside the threaded ring (205), a protrusion (207) is provided at the bottom of the threaded rod (206), the bottom of the protrusion (207) is connected to the gate plate (208), and a through hole is provided at the top of the cover body (101).

4. The flat gate valve with a self-flushing structure according to claim 1, characterized in that: The adjustment assembly comprises a passive bevel gear (406), the passive bevel gear (406) being connected to the top of the circular plate (401), and an active bevel gear (405) being provided on the right side of the passive bevel gear (406), and the active bevel gear (405) being rotatably connected to the gate plate (208).

5. A flat gate valve with a self-flushing structure according to claim 4, characterized in that: A first gear (404) is provided on the right side of the active bevel gear (405), a rack (403) is provided at the bottom of the first gear (404), an electric telescopic rod (402) is provided at the front end of the rack (403), the electric telescopic rod (402) is located inside the gate plate (208), and the rear side of the rack (403) is connected to the front end of the first straight rod (501).

6. The flat gate valve with a self-flushing structure according to claim 1, characterized in that: The pneumatic assembly comprises a first piston plate (502), the front end of the first piston plate (502) being interconnected with the first straight rod (501), a first cylinder (503) being provided on the outer side of the first piston plate (502), the first cylinder (503) being interconnected with the gate plate (208), and a connecting pipe (504) being connected to the rear side of the first cylinder (503).

7. A flat gate valve with a self-flushing structure according to claim 6, characterized in that: The bottom of the connecting pipe (504) is connected to a second cylinder (505), the second cylinder (505) and the gate plate (208) are connected to each other, a second piston plate (506) is provided inside the second cylinder (505), a second straight rod (507) is provided at the bottom of the second piston plate (506), and the bottom of the second straight rod (507) is connected to the right-angle rod (508).

8. The flat gate valve with a self-flushing structure according to claim 1, characterized in that: The control assembly comprises a first electric push rod (301) and a second electric push rod (302), the first electric push rod (301) and the second electric push rod (302) are both located inside the gate plate (208), a groove (305) is provided at the front end of the cross bar (303), and the bottom of the first electric push rod (301) is connected to the groove (305).

9. The flat gate valve with a self-flushing structure according to claim 1, characterized in that: The sewage discharge assembly comprises a connecting rod (306), wherein the connecting rod (306) and the cross rod (303) are connected to each other, a clamping rod (307) is provided at the bottom of the connecting rod (306), a vertical rod (308) is provided at the top of the blocking block (311), and the vertical rod (308) and the clamping rod (307) are connected to each other.

10. A flat gate valve with a self-flushing structure according to claim 9, characterized in that: A cross body (309) is provided at the top of the vertical rod (308), and a plurality of springs (310) are arranged circumferentially at the outer bottom of the cross body (309), and the bottom of the springs (310) is connected to the bottom of the valve body (103).

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