CN213773249U

CN213773249U - Gate for water conservancy channel

Info

Publication number: CN213773249U
Application number: CN202022736992.8U
Authority: CN
Inventors: 屠后翔; 苏成启; 杨昀梓
Original assignee: Anhui Kunyao Construction Engineering Co Ltd
Current assignee: Anhui Qingheng Construction Engineering Co.,Ltd.
Priority date: 2020-11-21
Filing date: 2020-11-21
Publication date: 2021-07-23
Anticipated expiration: 2030-11-21

Abstract

The application relates to a gate for a water conservancy channel, which relates to the field of water conservancy engineering technology and comprises a door frame and a gate plate arranged in the door frame in a sliding manner, wherein the door frame is provided with an opening and closing mechanism for starting the gate plate to slide along the height direction of the door frame; a filtering basket in the door frame is arranged in the door frame in a sliding manner; a steering mechanism for driving the flashboard and the filter basket to move reversely is arranged on the doorframe; the steering mechanism comprises first racks fixed on two sides of the flashboard, second racks fixed on two sides of the filtering basket and gears rotatably arranged on the inner side wall of the door frame; the first rack and the second rack are respectively meshed with two sides of the gear; when the flashboard is closed, the lower end surface of the filter basket is lower than the upper end surface of the flashboard. This application has the effect of conveniently clearing up debris in the filter basket.

Description

Gate for water conservancy channel

Technical Field

The application relates to the field of hydraulic engineering technology, in particular to a gate for a water conservancy channel.

Background

At present, a gate is indispensable water blocking and stopping equipment in water conservancy and hydropower engineering, can be used for adjusting the problem of dam water flow and can also be used for occasions with low sealing requirements in urban water supply and drainage and sewage treatment engineering, but is generally characterized in that the gate is opened and closed by still water.

Present, chinese utility model patent that bulletin number is CN211523129U discloses a gate for water conservancy channel, including the carriage, the gate board, adjusting screw, the rotation handle, the carriage is equipped with sealed arch, the gate board is equipped with the embedded groove, the carriage, sealed arch all is equipped with the sealing strip, the carriage is equipped with the instruction scale strip, the carriage is equipped with the reinforcing plate, the stiffener, the reinforcing plate, the diapire of carriage all is equipped with the picture peg, the carriage is equipped with the guide way, the gate board coating has waterproof coating, the carriage has set firmly and has filtered the piece, it is equipped with the filter chamber to filter the piece, it is equipped with the clearance mouth to filter the piece.

In view of the above-mentioned related art, the inventor believes that the fixing member is fixedly connected with the support frame, which is inconvenient for cleaning up the sundries in the filter element.

SUMMERY OF THE UTILITY MODEL

In order to solve the inconvenient problem of clearing up of debris in filtering, this application provides a gate for water conservancy channel.

The application provides a gate for water conservancy channel adopts following technical scheme:

a gate for a water conservancy channel comprises a gate frame and a gate plate arranged in the gate frame in a sliding mode, wherein an opening and closing mechanism used for starting the gate plate to slide along the height direction of the gate frame is arranged on the gate frame; the filter basket is arranged in the door frame in a sliding manner; a steering mechanism for driving the flashboard and the filter basket to move reversely is arranged on the doorframe; the steering mechanism comprises a first rack fixed on one side of the flashboard close to the filter basket, a second rack fixed on one side of the filter basket close to the flashboard and a gear rotatably arranged on the inner side wall of the door frame; two first racks are arranged and are respectively close to the inner side wall of the door frame; two second racks are arranged and respectively close to the inner side wall of the door frame; the number of the gears is two, and the two gears are respectively positioned on the two inner side walls of the door frame; the first rack and the second rack which are positioned on the same side of the door frame are respectively meshed with two sides of a gear; when the flashboard is closed, the lower end surface of the filter basket is lower than the upper end surface of the flashboard.

Through adopting above-mentioned technical scheme, set up opening and close mechanism and realize opening or closing the flashboard. The filter basket is arranged in the door frame in a sliding mode, the opening and closing mechanism controls the flashboard to be opened through the connection of the steering mechanism, the first rack is meshed with the gear, the second rack is meshed with the other side of the gear, and therefore the filter basket descends synchronously. In the in-process that the flashboard rises, the filtration basket descends, and after the flashboard was opened completely, the filtration basket stopped the rivers passageway completely, can realize the filter effect to rivers. When needs are closed the flashboard, filter the basket and can rise gradually, when the flashboard was closed completely, the position of filter the basket reached highest position, can conveniently clear up filterable debris in filtering the basket, need not to salvage the debris in filtering the basket at the bottom, convenient and fast more.

Preferably, the door frame comprises two opposite vertical frames, an upper transverse frame connected with the tops of the two vertical frames and a lower transverse frame connected with the bottoms of the two vertical frames; one side of one vertical frame, which is close to the other vertical frame, is provided with a first sliding chute and a second sliding chute which are arranged at intervals; the first sliding groove and the second sliding groove are arranged along the height direction of the door frame; the first rack is arranged in the first sliding groove in a sliding manner; the second rack is arranged in the second sliding groove in a sliding mode.

Through adopting above-mentioned technical scheme, set up first spout and second spout, can make flashboard and filter the basket and can slide along respective track, the slip orbit is reliable and stable.

Preferably, the opening and closing mechanism comprises a motor fixed on the upper end surface of the doorframe, a rotating rod rotatably arranged on the upper end surface of the doorframe and a screw rod rotatably arranged on the upper end of the flashboard; a worm wheel is rotatably arranged on the upper end face of the door frame; the worm wheel is provided with a slot in threaded connection with the lead screw; the rotating rod is horizontally arranged, and an output shaft of the motor is fixedly connected with one end of the rotating rod; a worm meshed with the worm wheel is arranged on the rotating rod; the upper end of the screw rod sequentially penetrates through the door frame and the slot and extends towards the direction far away from the upper end face of the door frame.

Through adopting above-mentioned technical scheme, open the motor, the motor drives the dwang and rotates, rotates with the worm wheel of the worm meshing on the dwang for the worm wheel rotates with the lead screw relatively, because the worm wheel rotates and sets up in the up end of door frame, makes the lead screw rise, and the lead screw drives the flashboard and rises, thereby can open the flashboard. The motor reverse rotation for the motor drives dwang reverse rotation, and the worm wheel is reverse to rotate, thereby makes the lead screw descend gradually, and then closes the flashboard. This structure is convenient for open automatically and close the flashboard, because the both sides of flashboard and the both sides of door frame slide and be connected for the flashboard removes the in-process more reliable and more stable.

Preferably, a buffering mechanism is arranged on the inner top wall of the door frame; the buffer mechanism comprises a buffer plate with two ends respectively arranged in the first sliding groove in a sliding manner and a buffer spring for connecting the wall of the first sliding groove with the buffer plate.

Through adopting above-mentioned technical scheme, set up buffer gear, open at the flashboard and rise the back, in order to reduce flashboard up end and door frame and bump the possibility, be favorable to buffering the flashboard, improve the protection to the flashboard.

Preferably, a buffer component is arranged between the inner top wall of the door frame and the buffer plate; the top of the buffer plate is provided with a strip-shaped groove; the strip-shaped grooves are arranged along the length direction of the buffer plate; two strip-shaped grooves are symmetrically arranged around the vertical central line of the door frame; buffering subassembly is including sliding the connecting spring and the one end that set up buffer block, connection buffer block and bar inslot wall in the bar inslot and articulate on the door frame roof and the other end articulates the buffer beam in the buffer block up end.

Through adopting above-mentioned technical scheme, set up the buffering subassembly, can further improve the protection to the flashboard for the buffer board's buffer capacity is stronger, and when the flashboard received the impact, the buffer block can remove along the length direction in bar groove, thereby transmits the impact force for coupling spring, improves the buffering effect of buffer board.

Preferably, one side of the buffer plate, which is far away from the inner top wall of the door frame, is provided with a rubber pad.

Through adopting above-mentioned technical scheme, the terminal surface sets up the rubber pad under the buffer board, can further improve the buffer capacity of buffer board, strengthens the protection effect to the flashboard.

Preferably, the filter basket comprises a first filter plate and a second filter plate, wherein two sides of the first filter plate are arranged in the door frame in a sliding mode, and the second filter plate is fixed on one side, far away from the flashboard, of the first filter plate; two second filter plates are arranged at intervals along the width direction of the first filter plate; a third filter plate is connected between the two second filter plates; a filtering bottom plate is arranged on one side of the first filtering plate, which is far away from the flashboard; two sides of the filtering bottom plate in the width direction are respectively connected with the two second filtering plates, and one side of the filtering bottom plate, which is far away from the first filtering plate, is abutted against the third filtering plate; the height of the first filter plate is greater than that of the flashboard; the height of the first filter plate is greater than that of the third filter plate.

Through adopting above-mentioned technical scheme, first filter plate, second filter plate and third filter plate and filter the bottom plate and enclose the filtration basket that establishes, can effectively intercept rubbish debris through first filter plate for rubbish debris can stay in filtering the basket, after will filtering the basket and salvage, can be convenient for clear up the rubbish debris of salvaging.

Preferably, the filter bottom plate is obliquely arranged from bottom to top in the direction close to the third filter plate; arc-shaped grooves are formed in the opposite sides of the two second filter plates and in positions close to the third filter plate; guide blocks which are arranged in the arc-shaped grooves in a sliding mode are arranged on two sides of the third filter plate; the guide block and the wall of the arc-shaped groove are connected with a guide spring; one side of the third filter plate, which is close to the first filter plate, is hinged with the first filter plate; the center of the arc-shaped groove is superposed with the axis of the rotary connection of the first filter plate and the second filter plate.

Through adopting above-mentioned technical scheme, when intercepting a small amount of rubbish, the filter base plate that the slope set up can be close to one side of first filter plate with rubbish debris direction, because the height of third filter plate is shorter, sets up the omission that can effectively reduce rubbish debris like this, and when rubbish debris is stacked more, the weight of rubbish debris forces the both sides of filter base plate to slide downwards along the arc wall, can bear more rubbish debris.

In summary, the present application includes at least one of the following beneficial technical effects:

when the flashboard is required to be closed, the filtering basket gradually rises until the flashboard is completely closed, the position of the filtering basket reaches the highest position, so that sundries filtered in the filtering basket can be conveniently cleaned, the sundries in the filtering basket do not need to be fished at the bottom, and the filtering basket is more convenient and faster;

the buffer mechanism is arranged, so that the possibility of collision between the upper end surface of the gate plate and a door frame is reduced after the gate plate is opened and ascended, the buffer mechanism is favorable for buffering the gate plate, and the protection of the gate plate is improved;

the opening and closing mechanism is convenient for automatically opening and closing the flashboard, and the two sides of the flashboard are connected with the two sides of the doorframe in a sliding manner, so that the flashboard is more stable and reliable in the moving process.

Drawings

Fig. 1 is a schematic structural diagram of the whole of the embodiment of the present application.

Fig. 2 is a schematic structural view of a filter basket according to an embodiment of the present disclosure.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is an enlarged schematic view of a portion B in fig. 1.

Fig. 5 is an enlarged schematic view of a portion C in fig. 1.

Description of reference numerals: 1. a door frame; 11. a mullion; 111. a first chute; 112. a second chute; 12. an upper horizontal frame; 13. a lower horizontal frame; 2. a shutter plate; 3. a filter basket; 31. a first filter plate; 32. a second filter plate; 321. an arc-shaped slot; 322. a guide block; 323. a guide spring; 33. a third filter plate; 34. a filter base plate; 4. an opening and closing mechanism; 41. a motor; 42. rotating the rod; 43. a worm; 44. a worm gear; 441. a slot; 45. a lead screw; 5. a steering mechanism; 51. a first rack; 52. a second rack; 53. a gear; 6. a buffer mechanism; 61. a buffer plate; 611. a strip-shaped groove; 62. a buffer spring; 63. a buffer assembly; 631. a buffer block; 632. a connecting spring; 633. a buffer rod; 64. and (7) a rubber pad.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses gate for water conservancy channel. Referring to fig. 1, a gate for a water conservancy channel includes a frame 1, a gate plate 2, and a filter basket 3. The gate plate 2 and the filter basket 3 are connected in the door frame 1 in a sliding manner.

Referring to fig. 1, a door frame 1 includes a mullion 11, an upper transom 12, and a lower transom 13. The mullions 11 are provided at intervals in two. The two ends of the upper horizontal frame 12 are respectively fixedly connected with the two sides of the vertical frame 11 close to the upper end, and the two ends of the lower horizontal frame 13 are respectively fixedly connected with the two sides of the vertical frame 11 close to the lower end.

Referring to fig. 1, an opening and closing mechanism 4 is fixedly installed on an upper end surface of an upper cross frame 12, and is used for starting the gate plate 2 to slide along the height direction of the door frame 1. The opening and closing mechanism 4 includes a motor 41, a rotating lever 42, a worm 43, a worm wheel 44, and a lead screw 45. Motor 41 is fixedly mounted on the upper end surface of upper horizontal frame 12 at a position close to one side of upper horizontal frame 12. The length direction of the rotating rod 42 is consistent with the length direction of the upper cross frame 12, and the output shaft of the motor 41 is fixedly connected with one end of the rotating rod 42. The worm 43 is fixed to the rotating lever 42, and two worms 43 are provided at an interval in the longitudinal direction of the rotating lever 42. An installation seat is fixed on the upper horizontal frame 12, the worm wheel 44 is rotatably connected in the installation seat, a slot 441 is formed in the center of the worm wheel 44, and an internal thread is formed on the inner wall of the slot 441. Two worm wheels 44 are provided, and the worm wheels 44 are engaged with the worm 43. The upper end of the screw 45 passes through the slot 441 and is in threaded connection with the slot 441. The lower end of the screw rod 45 passes through the upper horizontal frame 12 and is rotatably connected with the upper end surface of the shutter 2. The gate plate 2 is connected through the two lead screws, so that the stability of connection of the gate plate 2 is further improved.

Referring to fig. 2 and 3, the filter basket 3 includes a first filter sheet 31, a second filter sheet 32, a third filter sheet 33, and a filter bottom 34. Both sides of the first filter plate 31 are slidably connected to the inside of the doorframe 1. The second filter plates 32 are fixed on one side of the first filter plate 31 far away from the gate plate 2, two second filter plates 32 are arranged at intervals along the width direction of the first filter plate 31, and the two second filter plates 32 are respectively close to two inner side walls of the doorframe 1. The third filter plate 33 is parallel to the first filter plate 31, and both sides of the third filter plate 33 are fixedly connected to the two second filter plates 32. The two second filter plates 32 are provided with arc-shaped grooves 321 at opposite sides and positions close to the third filter plate 33, the filter bottom plate 34 is inclined from bottom to top in a direction close to the third filter plate 33, guide blocks 322 are fixed at two sides of the third filter plate 33, the guide blocks 322 are slidably connected in the arc-shaped grooves 321, and guide springs 323 are fixedly connected to the guide blocks 322 and the groove walls of the arc-shaped grooves 321. The third filter plate 33 is hinged to the first filter plate 31 on the side close to the first filter plate 31, and the center of the arc-shaped groove 321 coincides with the axis of the rotary connection between the first filter plate 31 and the second filter plate 32. Two sides of the third filter plate 33 are respectively in sliding fit with the opposite sides of the two second filter plates 32. When the garbage is deposited on the filtering bottom plate 34, the guide block 322 slides along the arc-shaped slot 321, and when the garbage is fully piled in the filtering basket 3, the filtering bottom plate 34 is in a horizontal state. The height of the first filter plate 31 is greater than the height of the shutter 2, and the height of the first filter plate 31 is greater than the height of the third filter plate 33.

Referring to fig. 1 and 4, a steering mechanism 5 is installed on the door frame 1 in order to drive the shutter 2 and the filter basket 3 to move in opposite directions in synchronization. The steering mechanism 5 includes a first rack 51, a second rack 52, and a pinion 53. The first chute 111 and the second chute 112 that the interval set up are seted up to one side that a mullion 11 is close to another mullion 11, and first chute 111 and second chute 112 all set up along the direction of height of door frame 1. The interval of first rack 51 is provided with two, and two first racks 51 all are fixed in one side that flashboard 2 is close to filter basket 3, and two first racks 51 are close to the both sides of door frame 1 inside wall respectively. The two first racks 51 are respectively slidably disposed in the first sliding grooves 111 of the two inner sidewalls of the door frame 1. The number of the second racks 52 is two, the two second racks 52 are fixed on one side of the filter basket 3 close to the gate plate 2, and the two second racks 52 are respectively close to two sides of the inner side wall of the door frame 1. The two second racks 52 are respectively slidably disposed in the second sliding grooves 112 of the two inner side walls of the door frame 1. The gear 53 is rotatably connected to the inner side wall of the door frame 1 at a position between the first sliding groove 111 and the second sliding groove 112, and the gear 53 is located at a middle position of the mullion 11. The first and

second racks

51 and 52 are engaged with both sides of the gear 53, respectively. When the shutter 2 is closed, the lower end surface of the filter basket 3 is lower than the upper end surface of the shutter 2, and the first filter plate 31 and the shutter 2 are partially overlapped.

Referring to fig. 1 and 5, a damper mechanism 6 is attached to an inner ceiling wall of the door frame 1 to improve protection of the shutter 2. The damper mechanism 6 includes a damper plate 61, a damper spring 62, and a damper assembly 63. The both ends of buffer board 61 are sliding connection respectively in first spout 111, and seted up two on the buffer board 61 and changeed the hole, change the diameter in hole and be greater than the diameter of lead screw 45, buffer board 61 cover locate on the lead screw 45 and with lead screw 45 sliding fit. The rubber pad 64 is bonded to the side of the buffer plate 61, which is far away from the inner top wall of the door frame 1, so that the buffer capacity of the buffer plate 61 is further improved. The two ends of the buffer spring 62 are respectively and fixedly connected with the groove wall of the first sliding groove 111 and the upper end surface of the buffer plate 61. The top of the buffer plate 61 is provided with a strip-shaped groove 611, and the length direction of the strip-shaped groove 611 is consistent with the length direction of the buffer plate 61. The two strip grooves 611 are symmetrically provided about a vertical center line of the door frame 1. Damper assembly 63 includes a damper block 631, a connecting spring 632, and a damper rod 633. The buffer block 631 is slidably coupled in the bar groove 611. The two ends of the connecting spring 632 are fixedly connected with the buffer block 631 and the inner wall of the strip-shaped groove 611 respectively. Buffering pole 633 is from bottom to top to the position slope setting that is close to door frame 1 middle part, and buffering pole 633's one end articulates on the roof in door frame 1, and buffering pole 633's the other end articulates in the up end of buffer block 631. When the gate rises, can contact with buffer board 61, the in-process that flashboard 2 continues to rise extrudees buffer board 61 for buffer spring 62 is compressed, and buffer block 631 slides along bar groove 611, extrudees connecting spring 632, can effectively improve the protection to flashboard 2.

The embodiment of the application provides an implementation principle of gate for water conservancy channel does: when the gate plate 2 needs to be opened, the motor 41 is started, the motor 41 drives the rotating rod 42 to rotate, the worm wheel 44 meshed with the worm 43 on the rotating rod 42 rotates, the worm wheel 44 and the lead screw 45 rotate relatively, the lead screw 45 rises due to the fact that the worm wheel 44 is arranged on the upper end face of the door frame 1 in a rotating mode, the lead screw 45 drives the gate plate 2 to rise, and therefore the gate plate 2 can be opened. In the ascending process of flashboard 2, first rack 51 meshes with gear 53 mutually, drives gear 53 and rotates, and gear 53 meshes with second rack 52 for second rack 52 drives filter basket 3 and moves down along the direction of height of door frame 1, and then can filter the rivers through door frame 1.

When the shutter 2 needs to be closed, the motor 41 is started to rotate reversely, so that the motor 41 drives the rotating rod 42 to rotate reversely, the worm wheel 44 rotates reversely, the screw rod 45 gradually descends, and the shutter 2 is closed. The gate plate 2 drives the first rack 51 to move downwards, and the gear 53 meshed with the first rack 51 rotates reversely, so that the second rack 52 rises, the filter basket 3 can be lifted, and sundries in the filter basket 3 can be cleaned conveniently.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a gate for water conservancy channel, includes door frame (1) and slides and set up flashboard (2) in door frame (1), its characterized in that: the door frame (1) is provided with an opening and closing mechanism (4) for starting the sliding of the flashboard (2) along the height direction of the door frame (1); the filter basket (3) is arranged in the door frame (1) in a sliding manner; a steering mechanism (5) for driving the flashboard (2) and the filter basket (3) to move reversely is arranged on the door frame (1); the steering mechanism (5) comprises a first rack (51) fixed on one side of the gate plate (2) close to the filter basket (3), a second rack (52) fixed on one side of the filter basket (3) close to the gate plate (2) and a gear (53) rotatably arranged on the inner side wall of the door frame (1); two first racks (51) are arranged, and the two first racks (51) are respectively close to the inner side wall of the door frame (1); two second racks (52) are arranged, and the two second racks (52) are respectively close to the inner side wall of the door frame (1); two gears (53) are arranged, and the two gears (53) are respectively positioned on two inner side walls of the door frame (1); the first rack (51) and the second rack (52) which are positioned on the same side of the door frame (1) are respectively meshed with two sides of a gear (53); when the flashboard (2) is closed, the lower end face of the filter basket (3) is lower than the upper end face of the flashboard (2).

2. The gate of claim 1, wherein the gate comprises: the door frame (1) comprises two vertical frames (11) which are arranged oppositely, an upper transverse frame (12) connected with the tops of the two vertical frames (11) and a lower transverse frame (13) connected with the bottoms of the two vertical frames (11); one side, close to the other vertical frame (11), of one vertical frame (11) is provided with a first sliding chute (111) and a second sliding chute (112) which are arranged at intervals; the first sliding groove (111) and the second sliding groove (112) are arranged along the height direction of the door frame (1); the first rack (51) is arranged in the first sliding groove (111) in a sliding manner; the second rack (52) is arranged in the second sliding groove (112) in a sliding mode.

3. The gate of claim 1, wherein the gate comprises: the opening and closing mechanism (4) comprises a motor (41) fixed on the upper end surface of the doorframe (1), a rotating rod (42) rotatably arranged on the upper end surface of the doorframe (1) and a screw rod (45) rotatably arranged on the upper end of the flashboard (2); a worm wheel (44) is rotatably arranged on the upper end face of the door frame (1); the worm wheel (44) is provided with a slot (441) in threaded connection with the screw rod (45); the rotating rod (42) is horizontally arranged, and an output shaft of the motor (41) is fixedly connected with one end of the rotating rod (42); a worm (43) meshed with the worm wheel (44) is arranged on the rotating rod (42); the upper end of the screw rod (45) sequentially penetrates through the door frame (1) and the slot (441) and extends towards the direction far away from the upper end face of the door frame (1).

4. The gate of claim 1, wherein the gate comprises: a buffer mechanism (6) is arranged on the inner top wall of the door frame (1); the buffer mechanism (6) comprises a buffer plate (61) with two ends respectively arranged in the first sliding groove (111) in a sliding manner and a buffer spring (62) connected with the groove wall of the first sliding groove (111) and the buffer plate (61).

5. The gate of claim 4, wherein the gate comprises: a buffer component (63) is arranged between the inner top wall of the door frame (1) and the buffer plate (61); the top of the buffer plate (61) is provided with a strip-shaped groove (611); the strip-shaped groove (611) is arranged along the length direction of the buffer plate (61); the two strip-shaped grooves (611) are symmetrically arranged relative to the vertical central line of the door frame (1); buffer component (63) including slide set up buffer block (631) in bar groove (611), connect buffer block (631) and bar groove (611) inner wall connecting spring (632) and one end articulate on door frame (1) interior roof and the other end articulates buffer lever (633) in buffer block (631) up end.

6. The gate of claim 5, wherein the gate comprises: and a rubber pad (64) is arranged on one side of the buffer plate (61) far away from the inner top wall of the door frame (1).

7. The gate of claim 1, wherein the gate comprises: the filter basket (3) comprises a first filter plate (31) arranged in the door frame (1) in a sliding mode and a second filter plate (32) fixed on one side, far away from the flashboard (2), of the first filter plate (31); two second filter plates (32) are arranged at intervals along the width direction of the first filter plate (31); a third filter plate (33) is connected between the two second filter plates (32); a filtering bottom plate (34) is arranged on one side, away from the flashboard (2), of the first filtering plate (31); two sides of the width direction of the filtering bottom plate (34) are respectively connected with the two second filter plates (32), and one side of the filtering bottom plate (34) far away from the first filter plate (31) is abutted against the third filter plate (33); the height of the first filter plate (31) is greater than that of the flashboard (2); the height of the first filter plate (31) is greater than that of the third filter plate (33).

8. The gate of claim 7, wherein the gate comprises: the filter bottom plate (34) is obliquely arranged from bottom to top in the direction close to the third filter plate (33); arc-shaped grooves (321) are formed in the opposite sides of the two second filter plates (32) and the positions close to the third filter plate (33); guide blocks (322) which are arranged in the arc-shaped grooves (321) in a sliding manner are arranged on two sides of the third filter plate (33); the guide block (322) and the wall of the arc-shaped groove (321) are connected with a guide spring (323); one side of the third filter plate (33) close to the first filter plate (31) is hinged with the first filter plate (31); the center of the arc-shaped groove (321) is superposed with the axis of the rotary connection of the first filter plate (31) and the second filter plate (32).