阅读说明：本技术 一种隐藏式地下拦水坝 (Hidden underground retaining dam ) 是由 刘明 于 2021-09-10 设计创作，主要内容包括：本发明属于拦水坝技术领域,尤其是一种隐藏式地下拦水坝,包括坝体和坝架,所述坝体的上表面设置有驱动装置、限位装置和伸缩装置,所述坝架固定安装在所述坝体的上表面,所述驱动装置位于所述坝体的内部并对河道的水进行自动拦水与放水。该隐藏式地下拦水坝,通过设置限位装置,能够对主闸门与副闸门进行限位的同时进行密封,通过主闸门上的梯形凹块在限位槽体内进行插接,能够对主闸门进行限位,梯形凹块与限位槽体的内壁呈梯形,增加了接触面积,起到密封效果,通过滚轮能够减小梯形凹块与限位槽体接触面的摩擦力,便于梯形凹块的滑动,副闸门上的梯形块能够在卡槽块内侧壁进行滑动插接,能够进行限位。(The invention belongs to the technical field of retaining dams, and particularly relates to a hidden underground retaining dam which comprises a dam body and a dam frame, wherein a driving device, a limiting device and a telescopic device are arranged on the upper surface of the dam body, the dam frame is fixedly installed on the upper surface of the dam body, and the driving device is located inside the dam body and is used for automatically retaining and discharging water in a river channel. This hidden underground retaining dam, through setting up stop device, can seal when carrying out spacingly main gate and vice gate, peg graft in the spacing groove through the trapezoidal concave piece on the main gate, can carry on spacingly to main gate, trapezoidal concave piece is trapezoidal with the inner wall of spacing groove, area of contact has been increased, play sealed effect, can reduce the frictional force of trapezoidal concave piece and spacing groove contact surface through the gyro wheel, the slip of the trapezoidal concave piece of being convenient for, trapezoidal piece on the vice gate can slide the grafting at the inside wall of draw-in groove piece, can carry on spacingly.)

1. The utility model provides a hidden underground retaining dam, includes dam body (1) and dam frame (11), its characterized in that: the dam comprises a dam body (1), and is characterized in that a driving device, a limiting device and a telescopic device are arranged on the upper surface of the dam body (1), a dam frame (11) is fixedly installed on the upper surface of the dam body (1), and the driving device is located inside the dam body (1) and is used for automatically blocking and discharging water in a river channel;

the limiting device is positioned on the outer side surface of the dam frame (11) and limits the driving device;

the telescopic device is positioned in the driving device and is used for blocking and discharging water at a high water level in a river channel.

2. A concealed underground barrage according to claim 1, wherein: the driving device comprises a driving mechanism, an overhauling mechanism and a drainage mechanism, wherein the driving mechanism can automatically block water and prevent water, the overhauling mechanism is convenient for an overhauling worker to overhaul the driving mechanism and the drainage mechanism, and the drainage mechanism conducts drainage work inside the driving mechanism.

3. A concealed underground barrage according to claim 2, wherein: actuating mechanism includes device chamber (2), set up in device chamber (2) the inside of dam body (1), the equal fixed mounting in inner diapire both sides of device chamber (2) has push hydraulic cylinder (21), the piston rod one end fixed mounting that pushes away hydraulic cylinder (21) has main gate (22), the one end of main gate (22) runs through the upper surface of dam body (1) extends to its outside.

4. A concealed underground barrage according to claim 3, wherein: the maintenance mechanism comprises a maintenance channel (23), the maintenance channel (23) is fixedly communicated with the inner top wall of the device cavity (2), one end of the upper surface through which maintenance is carried out is hinged with a sealing cover (24) through a pin shaft, the inner side wall of the maintenance channel (23) is fixedly provided with a ladder stand (25), and the other end of the ladder stand (25) is fixedly installed on the inner side wall of the device cavity (2).

5. A concealed underground barrage according to claim 3, wherein: the drainage mechanism comprises a drainage pump (26), the drainage pump (26) is fixedly installed on the inner bottom wall of the device cavity (2), an electromagnetic one-way valve (27) is fixedly installed at the water outlet end of the drainage pump (26) through a connecting pipe, one end of the one-way valve penetrates through the upper surface of the dam body (1) through the connecting pipe and extends to the outside of the dam body, and a water level sensor (28) is fixedly installed on the inner side wall of the device cavity (2).

6. A concealed underground barrage according to claim 3, wherein: stop device includes spacing cell body (3), two spacing cell body (3) fixed mounting respectively is in the both sides lateral surface of dam frame (11), the surface of spacing cell body (3) with dam body (1) go up fixed surface installation after one end run through the interior roof of device chamber (2), the interior roof fixed mounting of spacing cell body (3) has draw-in groove piece (31), the equal fixed mounting in both sides surface of main gate (22) has trapezoidal concave piece (32), two the surface of trapezoidal concave piece (32) respectively with two the inside wall slip grafting of spacing cell body (3), two the inner wall of trapezoidal concave piece (32) respectively with two the lateral surface slip of draw-in groove piece (31) cup joints.

7. A concealed underground barrage according to claim 6, wherein: the equal fixed mounting in both sides lateral surface of trapezoidal concave block (32) has gyro wheel (33) that are the distribution of rectangular array, the surface of gyro wheel (33) with the inside wall of spacing cell body (3) rotates and connects, the equal fixed mounting in both sides inner wall of spacing cell body (3) has sealing strip (34), the surface of sealing strip (34) with the lateral surface of trapezoidal concave block (32) slides and pegs graft.

8. A concealed underground barrage according to claim 6, wherein: the telescopic device comprises a telescopic mechanism and a pushing mechanism, the telescopic mechanism can block and discharge water of high-water-level water flow, and the pushing mechanism drives the telescopic mechanism to perform telescopic work.

9. A concealed underground barrage according to claim 8, wherein: telescopic machanism includes spout (4), spout (4) are seted up the upper surface of main gate (22), the inner wall of spout (4) slides and pegs graft and have vice gate (41), the equal fixed mounting in both sides surface of vice gate (41) has trapezoidal piece (42), two the lateral surface of trapezoidal piece (42) slides respectively and pegs graft the inside wall of draw-in groove piece (31), the equal fixed mounting in both sides surface of trapezoidal piece (42) has pulley (43) that are the rectangular array and distribute, the surface of pulley (43) with the inside wall of draw-in groove piece (31) rotates and connects, the equal fixed mounting in both sides inner wall of draw-in groove piece (31) has waterproof strip (44), the surface of waterproof strip (44) with the lateral surface slip grafting of trapezoidal piece (42).

10. A concealed underground barrage according to claim 9, wherein: pushing mechanism includes master rack (5), two master rack (5) fixed mounting is two respectively the inside wall of spacing cell body (3), two the lateral surface of trapezoidal concave piece (32) all is seted up flutedly (51), two the equal fixed mounting of inside wall through the bearing of recess (51) has drive gear (52), the surface of drive gear (52) with the surface toothing of master rack (5), two the lateral surface fixed mounting of trapezoidal piece (42) has vice rack (53), the surface of vice rack (53) with the surface toothing of drive gear (52).

Technical Field

The invention relates to the technical field of retaining dams, in particular to a hidden underground retaining dam.

Background

The water retaining dam is a water retaining structure which intercepts water flow of a river channel to raise the water level or adjust the flow; the water level can be raised, the runoff can be adjusted, the water head can be centralized, and the water level can be used for flood control, water supply, irrigation, hydroelectric generation, shipping improvement and the like; the river course regulating and controlling device has the functions of regulating the river course and protecting the bank bed.

Current water blocking dam is blocked water and waterproof work through the lift of the rotation control gate of motor drive threaded rod, and long-time motor and threaded rod expose and cause rust and corrosion easily in the air, and the phenomenon of rupture appears easily in the threaded rod, influences the switching-on and switching-off work in later stage, and the motor needs the cooperation of high-power motor and high voltage to control opening and shutting of gate simultaneously.

Disclosure of Invention

The invention provides a hidden underground retaining dam, which is based on the technical problems that an existing device for controlling lifting of a gate is exposed in air, rusty and corroded easily occur, later-stage opening and closing work is influenced, and meanwhile, a high-power motor and a high voltage are matched to control opening and closing of the gate.

The invention provides a hidden underground water retaining dam which comprises a dam body and a dam frame, wherein the upper surface of the dam body is provided with a driving device, a limiting device and a telescopic device;

the limiting device is positioned on the outer side surface of the dam frame and limits the driving device;

the telescopic device is positioned in the driving device and is used for blocking and discharging water at a high water level in a river channel.

Preferably, the driving device comprises a driving mechanism, an overhauling mechanism and a drainage mechanism, wherein the driving mechanism can automatically block water and prevent water, the overhauling mechanism is convenient for an overhauling person to overhaul the driving mechanism and the drainage mechanism, and the drainage mechanism drains water inside the driving mechanism;

preferably, the driving mechanism comprises a device cavity, the device cavity is arranged in the dam body, pushing hydraulic cylinders are fixedly mounted on two sides of the inner bottom wall of the device cavity, a main gate is fixedly mounted at one end of a piston rod of each pushing hydraulic cylinder, and one end of each main gate penetrates through the upper surface of the dam body and extends to the outside of the dam body;

through above-mentioned technical scheme, promote main gate through promoting the pneumatic cylinder and go up and down, prevent that actuating mechanism from being located the outside and rustting for a long time, promote through promoting the pneumatic cylinder simultaneously, can not need powerful motor to drive the threaded rod and drive main gate and go up and down.

Preferably, the maintenance mechanism comprises a maintenance channel, the maintenance channel is fixedly communicated with the inner top wall of the device cavity, one end of the upper surface, which passes through maintenance, is hinged with a sealing cover through a pin shaft, a ladder stand is fixedly installed on the inner side wall of the maintenance channel, and the other end of the ladder stand is fixedly installed with the inner side wall of the device cavity;

through above-mentioned technical scheme, close the access way through sealed lid and seal, prevent that water from getting into the access way, through access way access arrangement intracavity, the maintainer can overhaul the work in the later stage of being convenient for, pushing hydraulic cylinder and drain pump etc. through the cat ladder access arrangement intracavity in the access way.

Preferably, the drainage mechanism comprises a drainage pump, the drainage pump is fixedly installed on the inner bottom wall of the device cavity, an electromagnetic one-way valve is fixedly installed at the water outlet end of the drainage pump through a connecting pipe, one end of the one-way valve penetrates through the upper surface of the dam body through the connecting pipe and extends to the outside of the dam body, and a water level sensor is fixedly installed on the inner side wall of the device cavity;

through above-mentioned technical scheme, wherein level sensor and drain pump electric connection, when the water level in the device intracavity surpassed the threshold value that level sensor set for, the control drain pump carries out drainage work, discharges the water in device chamber to the dam body upper surface through the electromagnetism check valve, and the electromagnetism drain valve controls through level sensor, and after the water level in the device intracavity descends, the control electromagnetism check valve was closed, prevents that outside water from passing through the electromagnetism check valve backward flow and getting into the device chamber.

Preferably, the limiting device comprises limiting groove bodies, the two limiting groove bodies are respectively and fixedly installed on the outer side surfaces of the two sides of the dam frame, one end of the outer surface of each limiting groove body penetrates through the inner top wall of the device cavity after the outer surface of each limiting groove body is fixedly installed on the upper surface of the dam body, clamping groove blocks are fixedly installed on the inner top wall of each limiting groove body, trapezoidal concave blocks are fixedly installed on the outer surfaces of the two sides of the main gate, the outer surfaces of the two trapezoidal concave blocks are respectively in sliding insertion connection with the inner side walls of the two limiting groove bodies, and the inner walls of the two trapezoidal concave blocks are respectively in sliding sleeve connection with the outer side surfaces of the two clamping groove blocks;

through the technical scheme, spacing cell body is spacing to main gate, carry out the slip grafting in spacing cell body through trapezoidal concave piece, can carry on spacingly to main gate, the lower extreme of spacing cell body is located the inside in device chamber, the slip grafting of the main gate of being convenient for, personally submit trapezoidal form through trapezoidal concave piece is transversal, increase with the area of contact of spacing cell body, can play sealed effect, it can follow the gap between spacing cell body and the trapezoidal concave piece and pass through to reduce the rivers, the draw-in groove piece constitutes for two V type pieces, can play spacing and sealed effect to the inside vice gate of main gate.

Preferably, the outer side surfaces of two sides of the trapezoidal concave block are fixedly provided with rollers distributed in a rectangular array, the outer surface of each roller is rotatably connected with the inner side wall of the limiting groove body, the inner walls of two sides of the limiting groove body are fixedly provided with sealing strips, and the outer surface of each sealing strip is in sliding insertion connection with the outer side surface of the trapezoidal concave block;

through the technical scheme, the gyro wheel comprises support body and wheel, and the gyro wheel rotates to be connected on the support body, through the removal that promotes pneumatic cylinder promotion main gate, trapezoidal concave piece can slide in spacing cell body, and the gyro wheel can reduce the frictional force between trapezoidal concave piece and the spacing cell body, has increased the smoothness nature that trapezoidal concave piece removed in spacing cell body, and the sealing strip can play sealed effect to between spacing cell body and the trapezoidal concave piece simultaneously.

Preferably, the telescopic device comprises a telescopic mechanism and a pushing mechanism, the telescopic mechanism can block and discharge water from high-water-level water flow, and the pushing mechanism drives the telescopic mechanism to perform telescopic work;

preferably, the telescopic mechanism comprises a sliding chute, the sliding chute is arranged on the upper surface of the main gate, an auxiliary gate is inserted into the inner wall of the sliding chute in a sliding manner, trapezoidal blocks are fixedly mounted on the outer surfaces of two sides of the auxiliary gate, the outer side surfaces of the two trapezoidal blocks are respectively inserted into the inner side wall of the clamping groove block in a sliding manner, pulleys distributed in a rectangular array are fixedly mounted on the outer surfaces of the two sides of the trapezoidal blocks, the outer surfaces of the pulleys are rotatably connected with the inner side wall of the clamping groove block, waterproof strips are fixedly mounted on the inner walls of the two sides of the clamping groove block, and the outer surfaces of the waterproof strips are inserted into the outer side surfaces of the trapezoidal blocks in a sliding manner;

through the technical scheme, the height of main gate has been increased through the lift of vice gate, the shortcoming that the stroke that has compensatied the push hydraulic cylinder is not enough, simultaneously can block water and waterproof work fast, the trapezoidal piece can slide in the draw-in groove piece and peg graft, can play spacing and sealed effect, waterproof strip constitutes for rubber materials, can play sealed effect, the pulley has reduced the frictional force of vice gate and draw-in groove piece contact surface, make vice gate can go up and down fast, the inside wall fixed mounting of spout has joint strip, can prevent that water from passing through the gap flow direction opposite side between vice gate and the main gate.

Preferably, the pushing mechanism comprises main racks, the two main racks are respectively and fixedly installed on the inner side walls of the two limiting groove bodies, grooves are formed in the outer side surfaces of the two trapezoidal concave blocks, driving gears are respectively and fixedly installed on the inner side walls of the two grooves through bearings, the outer surfaces of the driving gears are meshed with the outer surfaces of the main racks, auxiliary racks are fixedly installed on the outer side surfaces of the two trapezoidal blocks, and the outer surfaces of the auxiliary racks are meshed with the outer surfaces of the driving gears;

through the technical scheme, the ascending of main gate can drive gear on the trapezoidal concave piece in both sides and rotate on main rack, when drive gear anticlockwise rotates, the vice rack with it meshing can rise, it rises together to drive vice gate, can increase the height of main gate, accelerate the closing speed, when main gate descends, can drive gear clockwise rotation, can drive vice rack and descend the work, it withdraws in the spout to drive vice gate, the both ends of main rack can set up limit switch and carry out spacingly to drive gear's removal.

The beneficial effects of the invention are as follows:

1. by arranging the driving device, the lifting operation of the main gate can be controlled by pushing the hydraulic cylinder, the driving mechanism can be hidden underground without affecting the appearance by arranging the device cavity underground, the main gate can be controlled to lift without high voltage by pushing the hydraulic cylinder, when water is fed into the cavity of the device, the water can be drained through the drainage pump in the drainage mechanism, when the pushing hydraulic cylinder and the drainage pump in the cavity need to be overhauled, an overhaul worker can enter the cavity of the device through the ladder stand to overhaul, thereby controlling the lifting of the main gate without a motor, hiding the driving device underground, solving the problems that the prior device for controlling the lifting of the gate of the water retaining dam is exposed in the air, is easy to generate rust and corrosion and affects the later work of opening and closing the gate, meanwhile, the motor needs a high-power motor and high voltage to be matched to control the opening and closing of the gate.

2. Through setting up stop device, can seal when carrying on spacingly main gate and vice gate, peg graft in the spacing groove through the trapezoidal concave piece on the main gate, can carry on spacingly to main gate, trapezoidal concave piece is trapezoidal with the inner wall of spacing groove body, area of contact has been increased, play sealed effect, can reduce the frictional force of trapezoidal concave piece and spacing groove body contact surface through the gyro wheel, the slip of the trapezoidal concave piece of being convenient for, trapezoidal piece on the vice gate can slide the grafting at the inside wall of draw-in groove piece, can carry on spacingly, thereby the water blocking effect of main gate and vice gate has been increased, simultaneously main gate and vice gate can carry out the elevating work fast.

3. Through setting up the telescoping device, can block water and waterproof work fast, compensate the not enough shortcoming of stroke of propelling movement pneumatic cylinder, through the removal of main gate, drive gear can rotate on main rack, can drive the vice rack of meshing with it and go up and down, and the removal of vice rack can drive the vice gate in the main gate and go up and down to can realize closing the action of floodgate and switching off fast, be convenient for block water and waterproof work.

Drawings

FIG. 1 is a schematic view of a concealed underground barrage according to the present invention;

FIG. 2 is a perspective view of a pushing cylinder structure of a concealed underground barrage according to the present invention;

FIG. 3 is a perspective view of a main gate structure of a hidden underground barrage according to the present invention;

FIG. 4 is a perspective view of a drainage pump structure of a hidden underground barrage according to the present invention;

FIG. 5 is a perspective view of a structure of a position-limiting groove of a hidden underground retaining dam according to the present invention;

FIG. 6 is a perspective view of a groove block structure of a hidden underground barrage according to the present invention;

FIG. 7 is a perspective view of a driving gear structure of a concealed type underground water barrier according to the present invention;

fig. 8 is a perspective view of a pulley structure of a concealed type underground barrage according to the present invention.

In the figure: 1. a dam body; 11. a dam frame; 2. a device cavity; 21. pushing the hydraulic cylinder; 22. a main gate; 23. overhauling the channel; 24. a sealing cover; 25. climbing a ladder; 26. draining pump; 27. an electromagnetic check valve; 28. a water level sensor; 3. a limiting groove body; 31. a slot clamping block; 32. a trapezoidal concave block; 33. a roller; 34. a sealing strip; 4. a chute; 41. an auxiliary gate; 42. a trapezoidal block; 43. a pulley; 44. a waterproof strip; 5. a main rack; 51. a groove; 52. a drive gear; 53. and a secondary rack.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-8, the hidden underground water retaining dam comprises a dam body 1 and a dam frame 11, wherein a driving device, a limiting device and a telescopic device are arranged on the upper surface of the dam body 1, and the dam frame 11 is fixedly arranged on the upper surface of the dam body 1.

As shown in fig. 2-4, the driving device is located inside the dam body 1 and automatically blocks and discharges water in the river channel;

the driving device comprises a driving mechanism, an overhauling mechanism and a drainage mechanism, the driving mechanism can automatically perform water blocking and water proofing work, the overhauling mechanism is convenient for overhauling personnel to overhaul the driving mechanism and the drainage mechanism, and the drainage mechanism performs drainage work inside the driving mechanism;

the driving mechanism is arranged at the inner position of the dam body 1, the device cavity 2 is formed in the dam body 1 for hiding the driving mechanism, the pushing hydraulic cylinders 21 are fixedly arranged on two sides of the inner bottom wall of the device cavity 2 for automatic water blocking and discharging, the main gate 22 is fixedly arranged at one end of the piston rod of each pushing hydraulic cylinder 21 for water blocking and discharging, and then one end of each main gate 22 penetrates through the upper surface of the dam body 1 and extends to the outside of the dam body;

the maintenance mechanism is arranged at the position of the inner top wall of the device cavity 2, in order to facilitate maintenance personnel to enter the device cavity 2 for maintenance work, the inner top wall of the device cavity 2 is fixedly communicated with a maintenance channel 23, in order to prevent water from entering the device cavity 2 through the maintenance channel 23, one end of the upper surface of the maintenance channel 23 is hinged with a sealing cover 24 through a pin shaft, in order to facilitate maintenance personnel to enter the device cavity 2 through maintenance, a ladder stand 25 is fixedly arranged on the inner side wall of the maintenance channel 23, and then the other end of the ladder stand 25 is fixedly arranged on the inner side wall of the device cavity 2;

a drainage mechanism installed on the inner bottom wall of the device cavity 2, a drainage pump 26 is fixedly installed on the inner bottom wall of the device cavity 2 for draining water entering the device cavity 2, an electromagnetic check valve 27 is fixedly installed on the water outlet end of the drainage pump 26 through a connecting pipe for preventing water from flowing back, a water level sensor 28 is fixedly installed on the inner side wall of the device cavity 2 for monitoring the water in the device cavity 2 for automatically draining water after the water outlet end of the electromagnetic check valve 27 is fixedly installed on the inner side wall of the device cavity 2 through a connecting pipe and then extends to the outside through the upper surface of the dam body 1, and the water level sensor 28 is respectively electrically connected with the drainage pump 26 and the electromagnetic check valve 27 for automatically draining water and stopping the operation.

As shown in fig. 5-6, the limiting device is located on the outer side surface of the dam holder 11 and limits the driving device;

the limiting device is arranged on the outer side surface of the dam frame 11, in order to limit the main gate 22, the limiting groove bodies 3 are fixedly arranged on the outer surfaces of two sides of the dam frame 11, then the outer surfaces of the limiting groove bodies 3 and the upper surface of the dam body 1 are fixedly arranged, one end of each limiting groove body penetrates through the inner top wall of the device cavity 2, in order to increase the contact area between the limiting groove bodies 3 and the main gate 22, trapezoidal concave blocks 32 are fixedly arranged on the outer surfaces of two sides of the main gate 22, then the outer side surfaces of the two trapezoidal concave blocks 32 are respectively inserted into the inner side walls of the limiting groove bodies 3 in a sliding mode, the trapezoidal concave blocks 32 are in a trapezoidal shape and used for increasing the sealing performance, in order to limit the telescopic device, clamping groove blocks 31 are fixedly arranged on the inner top wall of the limiting groove bodies 3, the clamping groove blocks 31 are formed by V-shaped blocks, and in order to increase the sealing performance, the inner side walls of the trapezoidal concave blocks 32 are slidably sleeved on the outer surfaces of the clamping groove blocks 31;

further, in order to facilitate the lift of main gate 22, at the equal fixed mounting gyro wheel 33 of both sides surface of trapezoidal concave piece 32, gyro wheel 33 is the lateral surface of rectangle array distribution at trapezoidal concave piece 32, gyro wheel 33 comprises support body and wheel, the wheel rotates to be connected on the support body, then the surface of gyro wheel 33 rotates with the inside wall of spacing cell body 3 to be connected and is used for reducing frictional force, realize the smoothness nature of main gate 22 lift, in order to seal up waterproof, at the equal fixed mounting sealing strip 34 of both sides inner wall of spacing cell body 3, then the surface of sealing strip 34 is used for carrying out waterproof work with the lateral surface slip grafting of trapezoidal concave piece 32, sealing strip 34 is formed by the rubber materials preparation.

As shown in fig. 7-8, the telescopic device is located inside the driving device and is used for blocking and discharging water at a high water level in the river.

The telescopic device comprises a telescopic mechanism and a pushing mechanism, the telescopic mechanism can block and discharge water for high-water-level water flow, and the pushing mechanism drives the telescopic mechanism to perform telescopic work;

the telescopic mechanism is arranged at the inner position of the main gate 22, in order to facilitate the main gate 22 to drive the telescopic mechanism to extend and retract, the upper surface of the main gate 22 is provided with a sliding groove 4, in order to make up for the defect that the stroke of the pushing hydraulic cylinder 21 is limited, an auxiliary gate 41 is slidably inserted into the inner wall of the sliding groove 4, in order to limit the auxiliary gate 41, trapezoidal blocks 42 are fixedly arranged on the outer surfaces of two sides of the auxiliary gate 41, in order to limit the trapezoidal blocks 42, the outer side surfaces of the trapezoidal blocks 42 are slidably inserted into the inner side wall of the clamping groove block 31, in order to facilitate the lifting of the auxiliary gate 41, pulleys 43 distributed in a rectangular array are fixedly arranged on the outer surfaces of two sides of the trapezoidal blocks 42, then the outer surfaces of the pulleys 43 are rotatably connected with the inner side wall of the clamping groove block 31 to reduce friction, in order to prevent water, waterproof strips 44 are fixedly arranged on the inner walls of two sides of the clamping groove block 31, and the waterproof strips 44 are made of rubber materials, then the outer surface of the waterproof strip 44 is in sliding splicing with the outer side surface of the trapezoidal block 42 to prevent water from flowing through a gap between the trapezoidal block 42 and the clamping groove block 31;

the pushing mechanism is installed on the inner side wall of the limit groove body 3, the auxiliary gate 41 is driven to move by the force of the main gate 22, the main rack 5 is fixedly installed on the inner side wall of the limit groove body 3, the force is transmitted by the main gate 22 conveniently, a groove 51 is formed in the outer side face of the trapezoidal bump, then the driving gear 52 is fixedly installed on the inner wall of the groove 51 through a bearing, the driving gear 52 is driven to rotate, the outer surface of the driving gear 52 is meshed with the outer surface of the main rack 5, the auxiliary gate 41 is driven to lift along with the lifting of the main gate 22, the auxiliary rack 53 is fixedly installed on the outer surface of the trapezoidal block 42, and then the outer surface of the auxiliary rack 53 is meshed with the outer surface of the driving gear 52 to drive the auxiliary rack 53 to lift.

The working principle is as follows: when the water retaining dam needs to retain water, the main gate 22 is pushed to ascend through the pushing hydraulic cylinder 21 in the device cavity 2, the trapezoidal concave blocks 32 on two sides of the main gate 22 slide upwards in the limiting groove body 3, the inner walls of the trapezoidal concave blocks 32 are in sliding connection with the outer side faces of the clamping groove blocks 31, meanwhile, the rollers 33 can rotate on the inner side walls of the limiting groove body 3, the sealing strips 34 prevent water from flowing through gaps between the limiting groove body 3 and the trapezoidal concave blocks 32, the driving gears 52 among the grooves 51 on the trapezoidal concave blocks 32 can rotate anticlockwise on the main racks 5 in the limiting groove body 3 to drive the auxiliary racks 53 on the trapezoidal blocks 42 to ascend, the ascending of the auxiliary racks 53 drives the auxiliary gate 41 to move upwards in the sliding groove 4 on the main gate 22 through the trapezoidal blocks 42, meanwhile, the outer surfaces of the trapezoidal blocks 42 ascend along the clamping groove blocks 31, and the clamping groove blocks 31 limit the trapezoidal blocks 42, the pulley 43 rotates on the inner wall of the clamping groove block 31, and the waterproof strip 44 can prevent water on one side from flowing to the other side through a gap between the trapezoidal block 42 and the clamping groove block 31;

when water is required to be prevented, the piston rod of the hydraulic cylinder 21 is pushed to pull the main gate 22 to descend, so that the driving gear 52 can rotate clockwise on the main rack 5 to drive the auxiliary rack 53 to descend, the auxiliary gate 41 is retracted into the chute 4, and water can be discharged above the auxiliary gate 41;

when the pushing hydraulic cylinder 21 and the drainage pump 26 in the device cavity 2 need to be maintained, a maintainer can open the sealing cover 24 to enter the maintenance passage 23 and enter the device cavity 2 through the ladder 25 to maintain the pushing hydraulic cylinder 21 or the drainage pump 26 inside, when water enters the device cavity 2 and the water level exceeds a threshold value set by the water level sensor 28, the water level sensor 28 controls the drainage pump 26 and the electromagnetic one-way valve 27 to be started, water in the device cavity 2 is drained to the upper part of the dam body 1, and after the water is drained, the drainage pump 26 and the electromagnetic one-way valve 27 are controlled to be closed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.