CN219731888U - Water taking gate - Google Patents

Abstract

The utility model discloses a water taking gate, which relates to the technical field of hydraulic engineering and comprises a dam foundation; two blocks of the dam foundation are symmetrically arranged, a drainage channel is arranged in the dam foundation, first notch is symmetrically arranged on the dam foundation, and a first sliding rail is arranged in the first notch; the dam foundation is also provided with a second notch positioned at the drainage channel, and a second sliding rail with the same structure as the first sliding rail is arranged in the second notch; the first sliding rail is internally provided with a main door body in a sliding way; a side door body is arranged in the second sliding rail in a sliding manner; and the dam foundation is also provided with lifting mechanisms which are respectively connected with the main door body and the side door body and used for controlling the main door body and the side door body to move up and down. Through setting up drainage channel and shunting the rivers at the in-process of the main door body interception rivers, reduce the effort of rivers to the main door body, be convenient for close the main door body retaining, open drainage channel drainage through the side body, the effort of rivers to the main door body when reducing to open the main door body is convenient for open the drainage of main door body.

Description

Water taking gate

Technical Field

The utility model relates to the technical field of hydraulic engineering, in particular to a water taking gate.

Background

The water taking gate is built on a river channel or a channel for controlling flow and regulating water level, the existing gate is segmented and integrated, and for the integrated gate, the flow direction of water flow is towards the gate when the channel through which the water flow passes is gradually reduced due to the impact of the water flow in the process of closing the gate for storing water, the generated acting force directly acts on the gate, and the resistance of the water flow to closing the gate is continuously increased, so that the gate is difficult to close; meanwhile, when the gate is opened to discharge water after water storage, the water level at the water level gate is higher than the height of normal flow, the pressure at the gate is larger, the acting force of water flow pushing the gate is larger, and larger force is needed for opening the gate.

The utility model of patent number CN216445925U discloses a water conservancy block sand water intaking gate, through having set up dwang and handle on original basis, the moment of dwang can the extension control adjustment dish, can effectually reduce pivoted dynamics through the principle of extension moment and lever, play better auxiliary role, reach convenient to use's effect, the high direct hand handle rotation that needs the quick adjustment control gate when the gate does not receive the resistance can, be convenient for quick adjustment, through setting up the protection casing of easy to assemble and disassemble, the protection casing can play better guard action, avoid the rainwater directly to get into the junction of control valve switch and lead to its rust difficult use. In the patent, the moment of the adjusting disc is prolonged to reduce the rotating force, but the acting force of water flow on the gate is not changed in the process of closing and opening the gate, and the acting force of water flow on the gate is also needed to be overcome in the process of closing and opening the gate, so that the gate is inconvenient to close or open.

The foregoing is provided merely for the purpose of facilitating an understanding of the present utility model and is not intended to represent the closest prior art to the foregoing.

Disclosure of Invention

The utility model mainly aims to provide a water taking gate which is used for solving the problem that the existing integrated gate is inconvenient to operate due to the fact that the acting force of water flow on the gate is large in the closing or opening process.

To achieve the above object, the present utility model provides a water intake gate comprising:

a dam foundation; two blocks of the dam foundation are symmetrically arranged, a drainage channel is arranged in the dam foundation, first notch is symmetrically arranged on the dam foundation, and a first sliding rail is arranged in the first notch; the dam foundation is also provided with a second notch positioned at the drainage channel, and a second sliding rail with the same structure as the first sliding rail is arranged in the second notch; the first sliding rail is internally provided with a main door body in a sliding way; a side door body is arranged in the second sliding rail in a sliding manner; and the dam foundation is also provided with lifting mechanisms which are respectively connected with the main door body and the side door body and used for controlling the main door body and the side door body to move up and down.

Further, a diversion dam is arranged on the dam foundation; the flow guiding dam is arranged towards the water flow direction and is of a structure with a triangular or fan-shaped section.

Further, the inlets of the drainage channels are located on opposite sides of the dam foundation.

Further, the lifting mechanism comprises a first lifting part connected with the main door body and used for controlling the main door body to move up and down, and a second lifting part connected with the side door body and used for controlling the side door body to move up and down.

Further, the first lifting part comprises a first lifting portal which is arranged on the dam foundation in a crossing way, and a first lifting screw rod is arranged on the first lifting portal; the first lifting screw is connected with the main door body, and a first transmission mechanism positioned on the first lifting door frame is arranged at one end of the first lifting screw connected with the first lifting door frame and used for driving the first lifting screw to rotate; the second lifting part comprises second lifting door frames symmetrically arranged on the dam foundation, and second lifting screw rods connected with the side door bodies are arranged on the second lifting door frames; and a second transmission mechanism positioned on the second lifting portal is arranged at one end, connected with the second lifting portal, of the second lifting screw and is used for driving the second lifting screw to rotate.

Further, the first transmission mechanism comprises a first rotating disc rotatably arranged on the first lifting portal frame and in threaded connection with the first lifting screw rod, and a first rotating handle arranged on the first rotating disc; the second transmission mechanism comprises a second rotating disc which is rotatably arranged on the second lifting portal and is in threaded connection with the second lifting screw, and a second rotating handle which is arranged on the second rotating disc.

Further, the lifting device also comprises a first driving mechanism arranged on the first lifting portal and connected with the first lifting screw rod, and a second driving part arranged on the second lifting portal and connected with the second lifting screw rod; the first driving mechanism is used for driving the first lifting screw to rotate; the second driving mechanism is used for driving the second lifting screw to rotate.

Further, the second lifting door frame is provided with a cross bar for connecting the two groups of second lifting door frames; the second lifting screw is provided with a first worm wheel disc which is in threaded connection with the second lifting screw and is in rotary connection with the second lifting door frame; the second rotating mechanism is arranged on the cross rod and used for driving the first worm wheel disc to rotate.

Further, the device also comprises a fourth driving part which is arranged on the cross rod and connected with the second transmission mechanism.

Further, the door also comprises a secondary door body; the auxiliary door body and the main door body are arranged in the first sliding rail in a pasting way; water passing channels are arranged on the main door body at intervals; and a third lifting part connected with the auxiliary door body is further arranged on the first lifting door frame and used for controlling the auxiliary door body to move up and down.

The beneficial effects of the utility model are as follows:

through setting up drainage channel and shunting the rivers at the in-process of the main door body interception rivers, reduce the effort of rivers to the main door body, be convenient for close the main door body retaining, open drainage channel drainage through the side body, the effort of rivers to the main door body when reducing to open the main door body is convenient for open the drainage of main door body.

Drawings

FIG. 1 is a schematic view of the overall structure of a water intake gate according to the present utility model;

FIG. 2 is a schematic view of a diversion dam structure of a water gate according to the present utility model;

FIG. 3 is a schematic view of another structure of a diversion dam of a water gate according to the present utility model;

FIG. 4 is a schematic view of a water drainage channel of a water intake gate according to the present utility model;

FIG. 5 is a schematic view of an interception net structure of a water gate according to the present utility model;

FIG. 6 is a schematic view of a sub-gate structure of the water intake gate of the present utility model;

FIG. 7 is a schematic view of a cross bar connection structure of a water intake gate according to the present utility model;

FIG. 8 is a schematic diagram of the structure of the first, second and third driving parts of the water gate according to the present utility model;

FIG. 9 is a schematic view of a fourth driving part of the water intake gate according to the present utility model;

reference numerals illustrate:

1. a dam foundation; 101. a first notch; 102. a first slide rail; 1021. a main slide rail; 1022. an auxiliary sliding rail; 103. a foundation; 104. a second notch; 105. a second slide rail; 106. a diversion dam; 2. a main door body; 3. a side door body; 4. a first lifting part; 401. a first lifting mast; 402. a first lifting screw; 403. a first rotating disc; 404. a first rotary handle; 5. a second lifting part; 501. a second lifting mast; 502. a second lifting screw; 503. a second rotating disc; 504. a second rotating handle; 6. a drainage channel; 7. an interception net; 8. an auxiliary door body; 9. a third lifting part; 901. a third lifting screw; 902. a third rotating disc; 903. a third rotary handle; 10. a cross bar; 11. a first turbine disk; 12. a worm; 13. a transmission shaft; 14. a second turbine disk; 15. a rotating shaft; 16. a fourth rotating disc; 17. a fourth rotating handle; 18. a first servo motor; 19. a first transmission gear; 20. a first gear tooth; 21. a second servo motor; 22. a second transmission gear; 23. a second gear tooth; 24. a third servo motor; 25. a third transmission gear; 26. a third gear tooth; 27. a fourth servo motor; 28. a fourth transmission gear; 29. a fourth gear tooth; 30. a support bracket;

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the described embodiments are merely some, but not all embodiments of the present utility model. Embodiments of the utility model and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In an embodiment, referring to fig. 1, a water intake gate of the present utility model includes a dam 1, a drain 6, a main gate 2, a side gate 3, and a lifting mechanism.

Wherein, two sets of dam foundation 1 symmetry sets up, and the symmetry is equipped with first notch 101 on the dam foundation 1, is equipped with first slide rail 102 in the first notch 101, is equipped with the foundation 103 of two dam foundations 1 of connection between the dam foundation 1.

Preferably, the dam foundation 1 is made of reinforced concrete.

Preferably, the first notch 101 is disposed on opposite sides of the two dam bases 1, and the first sliding rail 102 has a U-shaped cross section.

Preferably, referring to fig. 2 and 3, the dam foundation 1 is provided with a guide dam 106, the guide dam 106 is arranged towards the direction of the water flow, the guide dam 106 has a triangular or fan-shaped cross section, and the long side end of the guide dam 106 is in contact with the water flow.

Specifically, referring to fig. 4, a drain 6 is provided in the dam 1, and the inlets of the drain 6 are located on opposite sides of the dam 1.

Preferably, the dam foundation 1 is further provided with a second notch 104 positioned at the drainage channel 6, and a second sliding rail 105 which is consistent with the first sliding rail 102 in structure is arranged in the second notch 104.

Preferably, the drain channel 6 is L-shaped, the short side end of the drain channel 6 communicates with the second notch 104, and the long side end of the drain channel 6 extends through the dam 1 towards the flow direction of the water flow.

Specifically, referring to fig. 1, the main door body 2 is integrally formed and slidably disposed in the first slide rail 102.

Preferably, the main door body 2 has a rectangular structure or an arc structure, and two ends of the main door body 2 are provided with sliding strips matched with the first sliding rail 102.

Specifically, referring to fig. 1, the side door body 3 is slidably mounted in the second slide rail 105 for controlling the opening or closing of the drain passage 6.

Preferably, the side door body 3 has a rectangular structure.

Specifically, referring to fig. 1, the lifting mechanism includes a first lifting part 4 connected to the main door body 2 for controlling the up-and-down movement of the main door body 2, and a second lifting part 5 connected to the side door body 3 for controlling the up-and-down movement of the side door body 3.

Preferably, referring to fig. 2, the first lifting portion 4 includes a first lifting gantry 401 that spans across the dam foundation 1, a first lifting screw 402 is disposed on the first lifting gantry 401, the first lifting screw 402 is connected with the main door body 2, and a first transmission mechanism located on the first lifting gantry 401 is disposed on an end of the first lifting screw 402 connected with the first lifting gantry 401 and is used for driving the first lifting screw 402 to rotate.

Preferably, referring to fig. 2, the second lifting part 5 includes a second lifting door frame 501 symmetrically disposed on the dam foundation 1, a second lifting screw 502 connected with the side door body 3 is disposed on the second lifting door frame 501, and a second transmission mechanism located on the second lifting door frame 501 is disposed on one end of the second lifting screw 502 connected with the second lifting door frame 501 and used for driving the second lifting screw 502 to rotate.

Further, referring to fig. 2, the first transmission mechanism includes a first rotating disc 403 rotatably disposed on the first lifting gantry 401 and in threaded connection with the first lifting screw 402, and a first rotating handle 404 disposed on the first rotating disc 403, and the second transmission mechanism includes a second rotating disc 503 rotatably disposed on the second lifting gantry 501 and in threaded connection with the second lifting screw 502, and a second rotating handle 504 disposed on the second rotating disc 503.

In this embodiment, when the main door body 2 is closed to store water, due to the direct impact of water flow during the downward movement of the main door body 2, the side edge of the main door body 2 is tightly attached to the side wall of the first sliding rail 102 under the impact of water flow, the friction between the main door body 2 and the first sliding rail 102 is increased under the impact of water flow, so that the downward movement of the main door body 2 is blocked, a larger acting force is required to push the main door body 2 to move downwards, and as the main door body 2 moves downwards, the distance between the main door body 2 and the foundation 103 is smaller, so that the size of a channel through which water flows is reduced, and as the acting force of water flow is converged on the main door body 2 is continuously increased, so that the force pushing the downward movement of the main door body 2 is increased, and the difficulty in the downward movement of the main door body 2 to store water is increased; in the design, the first rotating handle 404 is rotated to drive the first rotating disc 403 to rotate, the first rotating disc 403 acts on the first lifting screw 402 through threads to push the first lifting screw 402 to move downwards, the first lifting screw 402 drives the main door body 2 to move downwards in the first sliding rail 102, the size of a channel through which water flows is gradually reduced, in the process of moving downwards the main door body 2, water flow intercepted by the main door body 2 is subjected to resistance convergence to enable the water level to rise, therefore, the second rotating handle 504 is rotated to drive the second rotating disc 503 to rotate, the second lifting screw 502 is driven to drive the side door body 3 to move upwards to open the water drainage channel 6, part of the intercepted water flow is discharged from the water drainage channel 6 in the process of moving downwards the main door body 2, the water flow capacity intercepted by the main door body 2 is reduced, the acting force of the water flow on the main door body 2 is reduced, the friction between the main door body 2 and the first sliding rail 102 is reduced so that the main door body 2 moves downwards to intercept water flow, after the main door body 2 moves down on the foundation 103 completely, the water flow flowing through the gaps around the main door body 2 is intercepted (the water flow flowing out of the gaps around the main door body 2 is negligible), at this time, the water flow intercepted by the main door body 2 flows out of the water discharge channel 6, and then the side door body 3 is controlled to move downwards to close the water discharge channel 6, thereby completing the water storage of the water flow, in the embodiment, the water discharge channel 6 assists water discharge, the acting force applied in the process of intercepting the water flow by the main door body 2 is reduced, the water storage of the water flow intercepted by the main door body 2 moves downwards is facilitated, the water flow discharged through the water discharge channel 6 is intercepted by the side door body 3, the water flow interception is finally completed, the space for water flow flowing in the water discharge channel 6 is limited and is smaller than the space for water flow flowing between two groups of the dam bases 1, when the side door body 3 is used for sealing the drainage channel 6, the acting force on the side door body 3 is limited in the process of moving down the side door body 3 due to limited water flow flowing through the drainage channel 6, so that the side body can move down to seal the drainage channel 6 conveniently.

When the main door body 2 is opened to drain, if the main door body 2 is directly opened to drain, the acting force of the water flow with higher water level after interception on the main door body 2 is larger, the friction force between the main door body 2 and the first sliding rail 102 is larger, larger acting force is needed when the main door body 2 is lifted, the side door body 3 can be moved upwards to open the drainage channel 6, the drainage operation is firstly carried out through the drainage channel 6, the water capacity is gradually reduced, thereby reducing the acting force of the water flow on the main door body 2, then the main door body 2 is moved upwards to drain, the acting force of the water flow with reduced capacity on the main door body 2 is reduced, thereby being convenient to move upwards to drain the main door body 2, the up-and-down movement of the main door body 2 and the side door body 3 is driven by the first lifting screw 402 and the second lifting screw 502.

Further, referring to fig. 6, the door further includes an auxiliary door body 8, the auxiliary door body 8 and the main door body 2 are both disposed in the first sliding rail 102, water channels are disposed on the main door body 2 at intervals, and a third lifting portion 9 connected with the auxiliary door body 8 is further disposed on the first lifting door frame 401 and used for controlling the auxiliary door body 8 to move up and down.

Preferably, referring to fig. 6, the first sliding rail 102 is divided into a main sliding rail 1021 and a sub sliding rail 1022, and the main door body 2 and the sub door body 8 are respectively slidably disposed in the main sliding rail 1021 and the sub sliding rail 1022.

Preferably, referring to fig. 6, the third lifting portion 9 includes a third lifting screw 901, and a third transmission mechanism located on the first lifting gantry 401 is disposed on an end of the third lifting screw 901 connected to the first lifting gantry 401, for driving the third lifting screw 901 to rotate.

Preferably, referring to fig. 6, the third transmission mechanism includes a third rotating disc 902 rotatably provided on the first lifting mast 401 in threaded connection with the third lifting screw 901, and a third rotating handle 903 provided on the third rotating disc 902.

In the process of operating the main door body 2 to move downwards to intercept water flow, the water flow is split through the drainage channel 6, the acting force of the water flow on the main door body 2 can be reduced, and therefore the friction force between the main door body 2 and the first sliding rail 102 is reduced, through setting the water flow channel, in the process of operating the main door body 2 to move downwards to intercept water flow, the water flow can flow out from the water flow channel through the main door body 2, the acting force of the water flow on the main door body 2 is reduced again, the main door body 2 is convenient to move downwards, after the main door body 2 moves downwards, the third rotating handle 903 is rotated to drive the third rotating disc 902 to rotate, the third lifting screw 901 is rotated to drive the auxiliary door body 8 to move downwards under the action of threads to seal the water flow channel, and therefore the water flow is cut off.

When draining, the water is drained through the water inlet and drain channel 6 of the side door body 3, the auxiliary door body 8 is opened, the water is drained through the water channel, and finally the main door body 2 is opened for draining.

Further, referring to fig. 5, an interception net 7 is provided at the short side end of the drainage channel 6 to prevent impurities in the water flow from entering the drainage channel 6 to block the drainage channel 6.

In an embodiment, referring to fig. 7, the second lifting gantry 501 is provided with a cross bar 10 connecting two groups of second lifting gantries 501, the second lifting screw 502 is provided with a first worm wheel disc 11 in threaded connection with the second lifting screw 502 and rotationally connected with the second lifting gantry 501, and the second rotation mechanism is disposed on the cross bar 10 and is used for driving the first worm wheel disc 11 to rotate.

Preferably, referring to fig. 7, the second rotating mechanism includes a fourth rotating disc 16 disposed on the cross bar 10, a rotating shaft 15 is disposed between the fourth driving disc and the cross bar 10, a second worm wheel disc 14 is disposed on the rotating shaft 15, support plates are symmetrically disposed on the cross bar 10, a transmission shaft 13 is rotatably disposed on the support plates, worms 12 meshed with the first worm wheel disc 11 and the second worm wheel disc 14 are disposed on the transmission shaft 13 at intervals, and a fourth rotating handle 17 is disposed on the fourth rotating disc 16.

In this embodiment, since the two sets of auxiliary door bodies 8 are symmetrically arranged, in the process of opening or closing the drainage channel 6 through the auxiliary door bodies 8, the auxiliary door bodies 8 can be controlled to move up and down simultaneously, the fourth rotating disc 16 is rotated to drive the rotating shaft 15 to rotate, so that the second worm wheel disc 14 rotates, the second worm wheel disc 14 is meshed with one set of worm 12 on the transmission shaft 13 to drive the transmission shaft 13 to rotate, the rest of worm 12 on the transmission shaft 13 is meshed with the first worm wheel disc 11 to drive the first worm wheel disc 11 to rotate, and the first worm wheel disc 11 is in threaded fit with the second lifting screw 502 to drive the second lifting screw 502 and the side door body 3 to move up and down to control the opening or closing of the drainage channel 6.

In an embodiment, based on the above embodiment, referring to fig. 8, the lifting device further includes a first driving mechanism disposed on the first lifting gantry 401 and connected to the first lifting screw 402, a second driving portion disposed on the second lifting gantry 501 and connected to the second lifting screw 502, and a third driving mechanism disposed on the first lifting gantry 401 and connected to the third lifting screw 901, where the first driving mechanism is used to drive the first lifting screw 402 to rotate, and the second driving mechanism is used to drive the second lifting screw 502 to rotate.

Preferably, the first driving mechanism comprises a first servo motor 18, a first transmission gear 19 is arranged at the output end of the first servo motor 18, first gear teeth 20 meshed with the first gear are arranged on a first rotating disc 403, the second driving mechanism comprises two groups of second servo motors 21, second transmission gears 22 are arranged at the output ends of the second servo motors 21, second gear teeth 23 meshed with the second gears are arranged on a second rotating disc 503, the third driving mechanism comprises a third servo motor 24, a third transmission gear 25 is arranged at the output end of the third servo motor 24, and third gear teeth 26 meshed with the third gear are arranged on a third rotating disc 902.

The first lifting screw 402 is driven to rotate by the first servo motor 18, and the first servo motor 18 is controlled to rotate forward or reversely, so that the first lifting screw 402 is controlled to move up or down, and the main door body 2 is controlled to move up and down; the second servo motor 21 drives the second lifting screw 502 to rotate, and the second servo motor 21 is controlled to rotate forward or reversely, so that the second lifting screw 502 is controlled to move up or down, and the side door body 3 is controlled to move up or down; the third servo motor 24 drives the third lifting screw 901 to rotate, and the third servo motor 24 is controlled to rotate forward or reversely, so that the third lifting screw 901 is controlled to move up or down, and the auxiliary door body 8 is controlled to move up and down.

In an embodiment, based on the above embodiment, referring to fig. 9, a fourth driving part is further included on the cross bar 10 and connected to the rotation shaft 15.

Preferably, the fourth driving part comprises a fourth servo motor 27, a fourth transmission gear 28 is arranged at the output end of the fourth servo motor 27, and fourth gear teeth 29 meshed with the fourth gear are arranged on the fourth rotating disk 16.

In this embodiment, the fourth servo motor 27 drives the rotation shaft 15 to rotate, so as to control the second lifting screws 502 at two sides of the dam foundation 1 to synchronously rotate, and the transmission mode is the same as the manual transmission mode, so that the fourth servo motor 27 is controlled to rotate forward or reversely, and the second lifting screws 502 are controlled to move up or down, so that the auxiliary door bodies 8 at two sides of the dam foundation 1 are controlled to synchronously move up or down.

Support brackets 30 may be provided to support the first, second, third, and fourth servomotors 18, 21, 24, and 27, respectively.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A water intake gate, characterized by: comprises a dam foundation (1); two dams (1) are symmetrically arranged, a drainage channel (6) is arranged in each dam (1), first notches (101) are symmetrically arranged on each dam (1), and first sliding rails (102) are arranged in each first notch (101); the dam foundation (1) is also provided with a second notch (104) positioned at the drainage channel (6), and a second slide rail (105) with the same structure as the first slide rail (102) is arranged in the second notch (104); a main door body (2) is arranged in the first sliding rail (102) in a sliding manner; a side door body (3) is arranged in the second sliding rail (105) in a sliding way; and lifting mechanisms which are respectively connected with the main door body (2) and the side door body (3) and used for controlling the main door body (2) and the side door body (3) to move up and down are also arranged on the dam foundation (1).

2. A water gate as defined in claim 1, wherein: a diversion dam (106) is arranged on the dam foundation (1); the flow guide dam (106) is arranged towards the direction of the water flow, and the flow guide dam (106) is of a structure with a triangular or fan-shaped cross section.

3. A water gate as claimed in claim 2, wherein: the inlets of the drainage channels (6) are positioned on the opposite sides of the dam foundation (1).

4. A water gate as claimed in claim 3, wherein: the lifting mechanism comprises a first lifting part (4) connected with the main door body (2) and used for controlling the main door body (2) to move up and down, and a second lifting part (5) connected with the side door body (3) and used for controlling the side door body (3) to move up and down.

5. A water gate as defined in claim 4, wherein: the first lifting part (4) comprises a first lifting portal (401) which is transversely arranged on the dam foundation (1), and a first lifting screw rod (402) is arranged on the first lifting portal (401); the first lifting screw (402) is connected with the main door body (2), and a first transmission mechanism positioned on the first lifting door frame (401) is arranged at one end of the first lifting screw (402) connected with the first lifting door frame (401) and used for driving the first lifting screw (402) to rotate; the second lifting part (5) comprises second lifting door frames (501) symmetrically arranged on the dam foundation (1), and second lifting screw rods (502) connected with the side door bodies (3) are arranged on the second lifting door frames (501); and a second transmission mechanism positioned on the second lifting portal (501) is arranged at one end of the second lifting screw (502) connected with the second lifting portal (501) and used for driving the second lifting screw (502) to rotate.

6. A water gate as defined in claim 5, wherein: the first transmission mechanism comprises a first rotating disc (403) rotatably arranged on the first lifting portal (401) and in threaded connection with the first lifting screw (402), and a first rotating handle (404) arranged on the first rotating disc (403); the second transmission mechanism comprises a second rotating disc (503) which is rotatably arranged on the second lifting portal (501) and is in threaded connection with the second lifting screw (502), and a second rotating handle (504) which is arranged on the second rotating disc (503).

7. A water gate as defined in claim 5, wherein: the lifting device further comprises a first driving mechanism arranged on the first lifting portal (401) and connected with the first lifting screw (402), and a second driving part arranged on the second lifting portal (501) and connected with the second lifting screw (502); the first driving mechanism is used for driving the first lifting screw (402) to rotate; the second driving part is used for driving the second lifting screw rod (502) to rotate.

8. A water gate as defined in claim 7, wherein: the second lifting door frames (501) are provided with cross bars (10) for connecting the two groups of second lifting door frames (501); the second lifting screw (502) is provided with a first worm wheel disc (11) which is in threaded connection with the second lifting screw (502) and is in rotary connection with the second lifting portal (501); the second transmission mechanism is arranged on the cross rod (10) and used for driving the first worm wheel disc (11) to rotate.

9. A water gate as defined in claim 8, wherein: the device also comprises a fourth driving part which is arranged on the cross rod (10) and connected with the second transmission mechanism.

10. A water intake gate as claimed in claim 9, wherein: the door also comprises a secondary door body (8); the auxiliary door body (8) is arranged in the first sliding rail (102) in a manner of being attached to the main door body (2); water passing channels are arranged on the main door body (2) at intervals; and a third lifting part (9) connected with the auxiliary door body (8) is further arranged on the first lifting door frame (401) and used for controlling the auxiliary door body (8) to move up and down.