CN111945676A

CN111945676A - Water tank, gate opening and closing device and control method of gate opening and closing device

Info

Publication number: CN111945676A
Application number: CN202010811775.2A
Authority: CN
Inventors: 吴有星; 占桂泉; 石向荣; 童昌平; 李四发
Original assignee: Zhejiang Jiuzhou Water Control Technology Co Ltd
Current assignee: Zhejiang Jiuzhou Water Control Technology Co Ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2020-11-17
Anticipated expiration: 2040-08-13
Also published as: CN111945676B

Abstract

The invention relates to the technical field of gate opening and closing, and discloses a water tank, a gate opening and closing device and a control method of the gate opening and closing device. The gate opening and closing device comprises a gate, a pulley assembly and the water tank; the pulley assembly comprises a pulley block and a flexible cable; one end of the flexible cable is connected with the box body, and the other end of the flexible cable bypasses the pulley block and is connected with the gate; the gate is opened or closed by injecting water into the tank or discharging water from the tank to increase or decrease the weight of the tank. Through the technical scheme, the water inlet and outlet mechanism can be used for injecting water into the box body or discharging the water in the box body so as to change the weight of the water inlet and outlet mechanism. Based on the arrangement of the pulley block and the flexible cable, the gate can be opened and closed, and resource waste and labor consumption are reduced.

Description

Water tank, gate opening and closing device and control method of gate opening and closing device

Technical Field

The invention relates to the technical field of gate opening and closing, in particular to a water tank, a gate opening and closing device and a control method of the gate opening and closing device.

Background

The water conservancy gate opening and closing device is a control facility for closing and opening a discharging or water discharging channel and an important component of a hydraulic building, and can be used for intercepting water flow, controlling water level, regulating flow, discharging silt and floating objects and the like. The gate is generally used for hydraulic buildings such as overflow dams, bank spillways, water discharge holes and hydraulic tunnels, and has the functions of intercepting water flow, controlling water level, adjusting flow, controlling shipping, discharging silt and floating objects and the like.

The river course of mountain and hilly areas slopes down steeply, and the water level of rich and dry water period becomes big greatly, needs to build the weir dam in the river course and raises the water level, then excavate the inlet channel on the bank side, and the induced river water is used for the field irrigation and rural residential quarter to improve the water environment. The gate needs to be opened to guide water under the condition that the water level of the river is low in the dry season, but the gate needs to be closed to prevent flood from pouring into farmlands or rural residential points when the water level of the river is high in the flood season.

The gate is usually small in scale, is located in a remote area, needs to be independently provided with a transformer when being provided with an electric hoist control gate, is not many in opening and closing times, is basically in an idling state, causes resource waste and is not economical; or a manual hoist is installed, the gate can be opened and closed only by manpower with better physical strength, so that great labor consumption is preferential.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the water tank, the gate opening and closing device and the control method of the gate opening and closing device, which can open and close the gate by utilizing the potential energy of water with higher river water level in the flood period, thereby reducing resource waste and labor consumption.

In order to achieve the above object, an aspect of the present invention provides a water tank including a tank body having a cavity therein and a water inlet and outlet mechanism provided on the tank body; the water inlet and outlet mechanism can inject water into the box body or discharge water in the box body according to the height of the water level of the river channel.

So, through business turn over water mechanism, can be according to the height of river course water level, to water injection or will the water discharging in the box to change its self weight. After the water tank is applied to the gate opening and closing device, the box body and the gate can be pulled by changing the weight of the box body, so that the effect of controlling the opening and closing of the gate is achieved. Resource waste and labor consumption are reduced.

Furthermore, the water inlet and outlet mechanism comprises an air pressure balance hole and a water inlet which are arranged on the top wall of the box body and are communicated with the inner space and the outer space of the box body;

the water inlet is provided with a siphon, and one end of the siphon extends to the lower part of the bottom wall of the box body from the water inlet and the other end of the bottom of the box body.

Further, an electromagnetic valve for opening and closing the siphon is arranged on the siphon.

Furthermore, the water tank also comprises an air closing device, the air closing device is fixed in position and comprises a flexible sheet and a connecting rod, the connecting rod penetrates through the air pressure balancing hole and extends into the tank body, and the flexible sheet is arranged at one end of the connecting rod, which is positioned in the tank body.

Further, the water inlet and outlet mechanism comprises:

the air pressure balancing hole is positioned at the top of the box body;

the water inlet is positioned on the box body;

the water inlet pipe is positioned at the water inlet, one end of the water inlet pipe is connected with the water inlet, and the other end of the water inlet pipe is provided with a water pump; the water inlet pipe is provided with a one-way valve, and the one-way valve is used for only allowing liquid to enter the box body along the water inlet pipe;

the water outlet is arranged on the bottom wall of the box body;

the electromagnetic valve is arranged at the water outlet and used for opening and closing the water outlet;

the distance sensor is positioned on the box body and used for monitoring the liquid level height below the box body;

the controller is respectively electrically connected with the distance sensor, the water pump and the electromagnetic valve; the water pump is used for receiving signals collected by the distance sensor, and opening and closing the electromagnetic valve and controlling the working state of the water pump according to the signals.

The invention provides a gate opening and closing device in a second aspect, which comprises a gate, a pulley assembly and a water tank, wherein the gate is arranged on the water tank; the pulley assembly comprises a pulley block and a flexible cable; one end of the flexible cable is connected with the box body, and the other end of the flexible cable bypasses the pulley block and is connected with the gate; the gate is opened or closed by injecting water into the tank or discharging water from the tank to increase or decrease the weight of the tank.

As described above, after the water tank is applied to the gate opening and closing device, the liquid may be injected into the tank or discharged from the tank through the water inlet and outlet mechanism to change its own weight. Based on the arrangement of the pulley block and the flexible cable, the gate can be opened and closed, and resource waste and labor consumption are reduced.

The third aspect of the invention provides a method for controlling a gate opening and closing device, which comprises the gate opening and closing device, and comprises the following steps:

and injecting liquid into the box body or discharging the liquid in the box body by using a siphon principle so as to increase or reduce the weight of the box body and open or close the gate.

The method can automatically control the opening and closing of the gate according to the height of the river water level so as to reduce labor consumption and resource waste.

Furthermore, the highest point of the siphon and the box body are arranged between the river water level and the normal river water level in the flood period, the water inlet end of the siphon is always arranged in the river and below the normal river water level, and the box body is arranged outside the river.

Further, when the water level of the river channel is higher than the highest point of the siphon, the water in the river channel flows into the box body to increase the weight of the box body, so that the gate is pulled to be opened;

and when the water level of the river channel is lower than the water level in the box body, discharging the water in the box body to reduce the weight of the box body, thereby drawing the gate to be closed.

Further, the flexible cable comprises a first flexible cable and a second flexible cable, and the pulley block comprises a first pulley and a second pulley; one end of the first flexible cable is connected with the box body, and the other end of the first flexible cable is connected with the balancing weight by bypassing the first pulley; one end of the second flexible cable is connected with the balancing weight, and the other end of the second flexible cable is connected with the gate by bypassing the second pulley;

when the water level of the river channel is higher than the highest point of the siphon, water in the river channel flows into the box body to increase the weight of the box body, so that the gate is pulled to be closed;

when the water level of the river channel is lower than the water level in the box body, water in the box body is discharged to reduce the weight of the box body, so that the gate is pulled to be opened.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a schematic diagram of the construction of one embodiment of a water tank;

FIG. 2 is a schematic view of a first embodiment in use;

FIG. 3 is a schematic structural view of another embodiment of a water tank;

FIG. 4 is a schematic view of the structure of FIG. 3 from another perspective;

FIG. 5 is a schematic view of a second embodiment in use;

FIG. 6 is a schematic view of the structure of FIG. 1 from another perspective;

FIG. 7 is a schematic view of a third embodiment in use;

FIG. 8 is a schematic view of the gate opening and closing control device in a use state;

FIG. 9 is a schematic structural view of an embodiment of an air-lock apparatus;

fig. 10 is a schematic view showing the assembled relationship of the air-closing means and the case.

Description of the reference numerals

10 box 21 air pressure balancing hole

22 water inlet pipe 23 water pump

24 electromagnetic valve 31 second water inlet

41 siphon of third water inlet 42

50 gate 61 first flexible cable

62 second wire 631 first pulley

632 second pulley 70 counterweight

635 third deflector wheel 26 drain

25 siphon

Detailed Description

The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of the terms of orientation such as "upper and lower" in the case where no description is made to the contrary generally means the orientation in the assembled and used state. "inner and outer" refer to the inner and outer contours of the respective component itself.

The first embodiment is as follows: as shown in fig. 1 and 2, a water tank includes a tank body 10 having a cavity therein and a water inlet and outlet mechanism provided on the tank body 10; the water inlet and outlet mechanism can inject water into the box body 10 or discharge water in the box body 10 according to the height of the water level of a river channel. The water inlet and outlet mechanism comprises an air pressure balancing hole 21 and a water inlet which are arranged on the top wall of the box body 10 and are communicated with the inner space and the outer space of the box body 10; wherein, a siphon 25 is arranged at the water inlet, and one end of the siphon 25 extends from the water inlet to the bottom of the tank 10 and the other end extends to the bottom of the tank 10. Preferably, a valve for opening and closing the siphon tube 25 is provided on the siphon tube 25. Further preferably, the valve is a solenoid valve. In the case of a controller, the solenoid valve may be controlled remotely by a control, opening and closing the siphon 25, to control the filling and draining of the tank 10.

Aiming at the water tank, the gate opening and closing device comprises a gate 50, a pulley assembly and the water tank, wherein the water inlet and outlet mechanism of the water tank adopts the water inlet and outlet mechanism in the specific embodiment mode. The pulley assembly comprises a pulley block and a flexible cable; one end of the flexible cable is connected with the box body 10, and the other end of the flexible cable bypasses the pulley block and is connected with the gate 50; the gate 50 is opened or closed by increasing or decreasing the weight of the tank 10 by injecting water into the tank 10 or discharging the water from the tank 10. Preferably, the flexible cable can be a steel cable or a chain.

Aiming at the gate opening and closing device, a control method of the gate opening and closing device is provided. The control method of the gate opening and closing device comprises the following steps: the liquid is injected into the tank 10 or the liquid in the tank 10 is discharged by using the siphon principle to increase or decrease the weight of the tank 10 to open or close the gate 50.

According to different requirements, the control method of the gate opening and closing device can be applied to different scenes.

Scene one: when the box body 10 is required to descend, the gate 50 ascends; when the case 10 is raised, the shutter 50 is lowered. Specifically, as shown in fig. 2, the highest point of the siphon 25 and the tank 10 are placed between the river level and the normal river level in the flood period, the water inlet end of the siphon 25 is always placed in the river and below the normal river level, and the tank 10 is placed outside the river. When the water level in the river channel is higher than the highest point of the siphon 25, the water in the river channel will flow into the box 10 to increase the weight of the box 10, thereby pulling the gate 50 to open; when the river level is lower than the water level in the tank 10, the water in the tank 10 is drained to reduce the weight of the tank 10, thereby drawing the gate 50 closed.

The term "water inlet end of the siphon tube 25" refers to an end of the siphon tube 25 not connected to the tank 10.

It should be emphasized that the above description of "always placing the water inlet end of the siphon tube 25 in the river below the normal river level" means that the water inlet end of the siphon tube 25 is always kept in the river below the normal river level even if the tank 10 is raised or lowered.

Scene two: when the box 10 is required to be lifted, the gate 50 is lifted; when the casing 10 descends, the shutter 50 descends. In this scenario, a weight 70, a wire, and a pulley assembly are required. As shown in fig. 8, specifically, the flexible cable includes a first flexible cable 61 and a second flexible cable 62, and the pulley group includes a first pulley 631 and a second pulley 632; one end of the first flexible cable 61 is connected to the case 10, and the other end is connected to the weight 70 by passing around the first pulley 631; one end of the second flexible cable 62 is connected to the weight 70, and the other end is connected to the gate by passing around the second pulley 632. When the water level in the river channel is higher than the highest point of the siphon 25, the water in the river channel will flow into the box 10 to increase the weight of the box 10, thereby pulling the gate 50 to close; when the river water level is lower than the water level in the tank 10, the water in the tank 10 is drained to reduce the weight of the tank 10, thereby drawing the gate 50 open. Preferably, as shown in fig. 8, the pulley assembly further includes a first guide wheel 633, a second guide wheel 634, and a third guide wheel 635. The first guide wheel 633 is located between the case 10 and the first pulley 631, the second guide wheel 634 is located between the first pulley 631 and the weight block 70, and the third guide wheel 635 is located between the weight block 70 and the second pulley 632.

The working principle of the first scenario is as follows: when the river level is below the highest point of the siphon 10, as shown in fig. 2, the siphon 10 will be filled with water, since there is no water in the tank 10 and the tank 10 is below the river level. According to the siphon effect, the water in the river will flow into the tank 10, and the tank 10 is lowered due to the increase of the weight, thereby drawing the gate 50 up (i.e., opening the gate). In this way, it is achieved that the water in the channel will be led to another channel or used for irrigating farmlands. When the water level of the river falls below the water level in the tank 10, the water in the tank 10 flows out (is discharged) also based on the siphon effect, and the tank 10 is raised due to the weight reduction, and the gate 50 is lowered (i.e., the gate is closed). The principle is that the potential energy of the high utilization water of the river course water level in the flood period is utilized to realize opening and closing of the gate, and manual interference is not needed in the process. Greatly reduces the labor consumption and the resource waste and overcomes the technical problems in the prior art.

The working principle of the scene two is as follows:

as shown in fig. 8, when the water level of the river is lower than the highest point of the siphon tube 10, the siphon tube 10 is filled with water, since there is no water in the tank 10 and the tank 10 is located below the water level of the river. According to the siphon effect, the water in the river will flow into the box 10, the box 10 will descend due to the weight increase, the counterweight block 70 will ascend due to the traction, the gate 50 will descend (i.e. the gate 50 will be closed), and the flood in the river is prevented from entering the irrigation canal, thereby playing the role of flood control. When the water level in this river course drops to the water level that is less than in box 10, also be based on the siphon effect, the water in box 10 will flow out (discharge), and box 10 rises because of weight reduction, and balancing weight 70 descends, and gate 50 rises (gate 50 opens promptly), draws river course water to get into and irrigates the inlet channel and be used for irrigating the farmland and improve the resident's spot water environment.

The second embodiment is as follows:

as shown in fig. 3 and 4, the water tank includes a tank body 10 having a cavity therein and a water inlet and outlet mechanism provided on the tank body 10; the water inlet and outlet mechanism can inject water into the box body 10 or discharge water in the box body 10 according to the height of the water level of a river channel.

Wherein, business turn over water mechanism includes:

an air pressure balancing hole 21 positioned at the top of the case 10;

a water inlet on the box body 10;

the water inlet pipe 22 is positioned at the water inlet, one end of the water inlet pipe is connected with the water inlet, and the other end of the water inlet pipe is provided with a water pump 23; a one-way valve is arranged on the water inlet pipe 22 and is used for only allowing liquid to enter the box body 10 along the water inlet pipe 22;

a drain port provided in the bottom wall of the case 10;

an electromagnetic valve 24 provided at the drain port for opening and closing the drain port;

the distance sensor is positioned on the box body 10 and used for monitoring the liquid level below the box body 10;

the controller is respectively electrically connected with the distance sensor, the water pump 23 and the electromagnetic valve 24; for receiving the signal collected by the distance sensor, and opening or closing the electromagnetic valve 24 and controlling the working state of the water pump 23 according to the signal. The 'working state' comprises the starting, stopping, running power and the like of the water pump. Preferably, the controller is a PLC controller.

It should be noted that the weight of the gate 50 should be greater than the weight of the tank when water is not being filled. This allows the gate 50 to be closed when the tank is not filled with water.

Aiming at the water tank, the gate opening and closing device is provided and comprises a gate 50, a pulley assembly and the water tank; the pulley assembly comprises a pulley block and a flexible cable; one end of the flexible cable is connected with the box body 10, and the other end of the flexible cable bypasses the pulley block and is connected with the gate 50; the gate 50 is opened or closed by increasing or decreasing the weight of the tank 10 by injecting water into the tank 10 or discharging the water from the tank 10.

The second embodiment is different from the first embodiment in actual use. Specifically, in the second embodiment, as shown in fig. 5, the casing 10 is suspended above the river. When the water level rises, the distance sensor collects corresponding signals, the signals are transmitted to the controller, the controller controls the water pump 23 to pump water in the river channel into the box body 10 according to the signals, and the height of the box body 10 is reduced along with the increase of the weight. One end of the flexible cable is connected with the box body 10, and the other end of the flexible cable bypasses the pulley block and is connected with the gate 50. Thus, when the tank 10 is lowered, the shutter is opened and vice versa closed. When the water level drops, the distance sensor collects a corresponding signal and transmits the signal to the controller, and the electromagnetic valve is opened according to the signal to discharge the water in the tank body 10. At this time, the weight of the casing 10 is gradually reduced, and the height of the gate 50 is gradually lowered, that is, the gate 50 is closed.

It should be noted that, in general, the controller has a signal conversion module, such as an a/D conversion module. Therefore, there is no technical obstacle to signal transmission between the distance sensor, the controller, and the solenoid valve 24.

It should be noted that the signal collected by the distance sensor specifically refers to the distance between the water surface and the bottom wall of the tank 10. For example, when the distance between the water surface and the bottom wall of the tank 10 is less than or equal to H, a threshold value for the distance sensor to transmit a signal to the controller may be reached, and the controller may control the water pump 23 to pump water in the river channel into the tank 10 according to the signal. When the distance between the water surface and the bottom wall of the box body 10 is larger than H, the controller controls the water pump 23 to pump the water in the river channel into the box body 10.

To summarize this specific embodiment: when the water level rises, water is pumped into the box body 10, the weight of the box body 10 is increased, the box body 10 descends, and the gate 50 rises and opens; the water level is lowered, the weight of the tank 10 is reduced, the tank 10 is raised, and the gate 5 is lowered and closed.

The second embodiment is further provided with a counterweight 70, a flexible cable and a pulley assembly. The condition that the gate needs to be opened to introduce water into the river channel when the water level is low can be realized. Specifically, referring to fig. 8, the wire includes a first wire 61 and a second wire 62, and the pulley block includes a first pulley 631 and a second pulley 632. One end of the first flexible cable 61 is connected to the case 10, and the other end is connected to the weight 70 by passing around the first pulley 631; one end of the second flexible cable 62 is connected to the weight 70, and the other end is connected to the gate by passing around the second pulley 632. In use, referring to figure 8, the tank 10 is suspended above the river. When the water level rises, the distance sensor collects corresponding signals, the signals are transmitted to the controller, the controller controls the water pump 23 to pump water in the river channel into the box body 10 according to the signals, and the height of the box body 10 is reduced along with the increase of the weight. Accordingly, the weight 70 is lifted by the lowering of the housing 10, and the gate 50 is lowered, i.e., closed. When the water level drops, the distance sensor collects a corresponding signal and transmits the signal to the controller, and the electromagnetic valve is opened according to the signal to discharge the water in the tank body 10. At this time, the weight of the case 10 is gradually reduced, the case 10 is raised, the weight 70 is lowered, and the gate 50 is raised, that is, the gate 50 is opened.

This embodiment considers the situation that when the water level is low, the gate needs to be opened to introduce water into the river. The gate 50 is raised as the casing 10 is raised, and is lowered as the gate 50 is lowered.

It should be noted that in the above-described embodiment, it is ensured that the tank 10 cannot come into contact with the water surface even when the tank 10 is lowered to the lowest point.

On the one hand, the consideration of preventing the wire from contacting the river, and on the other hand, the intention is to make the box 10 naturally sag. Referring to fig. 8, the pulley assembly further includes a first guide wheel 633, a second guide wheel 634, and a third guide wheel 635; the first guide wheel 633 is located between the case 10 and the first pulley 631, the second guide wheel 634 is located between the first pulley 631 and the weight block 70, and the third guide wheel 635 is located between the weight block 70 and the second pulley 632.

According to the technical scheme of the second embodiment, water can be injected into the box body 10 or the water in the box body 10 can be discharged according to the water level of the river channel, so that the weight of the box body can be changed. The gate 50 is dragged, so that the effect of automatically controlling the opening and closing of the gate 50 is achieved, the resource waste and the labor consumption are reduced, and the technical problem in the prior art is solved.

The third concrete implementation mode:

as shown in fig. 1 and 6, the water tank includes a tank body 10 having a cavity therein and a water inlet and outlet mechanism provided on the tank body 10; the water inlet and outlet mechanism can inject water into the box body 10 or discharge water in the box body 10 according to the height of the water level of a river channel. The water inlet and outlet mechanism comprises an air pressure balancing hole 21 and a water inlet which are arranged on the top wall of the box body 10 and are communicated with the inner space and the outer space of the box body 10; wherein, a siphon 25 is arranged at the water inlet, and one end of the siphon 25 extends from the water inlet to the bottom of the tank 10 and the other end extends to the bottom of the tank 10. A drain hole 26 is formed in the bottom wall of the box body 10, and the aperture of the drain hole 26 is far smaller than the aperture of the water inlet. The siphon 25 is provided with a water injection port on the wall.

Aiming at the water tank, the gate opening and closing device comprises a gate 50, a pulley assembly and the water tank; the pulley assembly comprises a pulley block and a flexible cable; one end of the flexible cable is connected with the box body 10, and the other end of the flexible cable bypasses the pulley block and is connected with the gate 50; the gate 50 is opened or closed by increasing or decreasing the weight of the tank 10 by injecting water into the tank 10 or discharging the water from the tank 10.

Aiming at the gate opening and closing device, a control method of the gate opening and closing device is provided. When in use, as shown in fig. 7, the other end of the siphon 25 is placed in the river channel a, and the box body 10 is placed below the liquid level of the river channel a. When the water level in the watercourse a is higher than the tank 10, water is injected into the tank 10 according to the siphon effect, the weight of the tank 10 is increased, the tank 10 is lowered, and the gate 50 is opened by being raised. At this time, the water in the river channel A can be drained to the river channel B.

It is considered that when the gate 50 is opened, if the gate 50 is closed, the water in the case 10 needs to be discharged to close the gate 50. For this purpose, a drain hole 26 is provided in the bottom wall of the case 10 as shown in fig. 2. In theory, it is sufficient if the diameter of the drain hole 26 is smaller than the diameter of the water inlet. Preferably, the aperture of the drain hole 26 is set to be much smaller than the aperture of the water inlet. Further preferably, the water discharge hole 26 is one-half to one-tenth of the aperture of the water inlet.

Based on the arrangement of the drainage hole 26, when the water level in the channel a is higher than the tank 10, the water in the channel a flows into the tank 10 along the siphon 25 due to the siphon effect. The water inlet speed of the tank 10 is much higher than the water discharge speed due to the difference between the aperture of the water discharge hole 26 and the aperture of the water inlet. Therefore, the weight of the box 10 still tends to increase, and as the box 10 increases, the box 10 descends, and the gate 50 ascends and opens, so that the water in the river channel a is guided to the river channel B. The siphon 25 is separated from the river a, and the water in the tank 10 is discharged through the drain hole 26, so that the weight of the tank 10 is reduced, the tank 10 is lifted, and the gate 50 is lowered and closed.

It is considered that if there is no water in the siphon tube 25, it is difficult to generate a siphon effect. Therefore, a water injection port is provided on the pipe wall of the siphon tube 25. Water can be injected into the siphon tube 25 through the water injection port. In addition, a valve for opening and closing the siphon tube 25 is provided on the siphon tube 25. The valve can be an electromagnetic valve.

In one embodiment, the "other end of the siphon tube 25" refers to an end located outside the tank 10.

Through the technical scheme of the third specific implementation mode, the automatic opening and closing of the gate can be controlled, and manual interference is not needed. The technical problems of the prior art can be overcome.

The fourth concrete implementation mode:

in the fourth embodiment, an air-lock device is added to the first embodiment. As shown in fig. 9 and 10, the air-lock device includes a flexible sealing sheet 81 and a connecting rod 82, the connecting rod 82 extends into the case 10 through the air pressure balancing hole 21, and one end of the connecting rod 82 located in the case 10 is provided with the flexible sealing sheet 81. The air-tight device is fixed in position, and the connecting rod 82 is fixedly connected to a peripheral wall or a fixture. Preferably, the flexible sealing sheet 81 is made of rubber, for example.

It should be noted that when the tank 10 is lowered to the bottom, the water in the tank 10 is not filled, and a certain gas space is still present at the top of the tank 10.

Thus, when the tank 10 is lowered to the lowest point (i.e. lowered to the lowest point), the siphon tube 25 continues to supply water, the air in the tank 10 is pressurized, the flexible sealing sheet 81 seals the air pressure balancing hole 21 more tightly, the water flow is prevented, and the siphon tube 25 stops supplying water. After the water level of the river channel is reduced, compressed air in the water tank 10 is pressed out, and when the water flows to a certain degree, the air pressure in the water tank 10 is smaller than the atmospheric pressure, the atmospheric pressure can press the flexible sealing sheet 81 into the water tank 10, the air pressure balance hole 21 is opened, water is continuously discharged through the siphon 25, the water level in the water tank 10 is reduced, and the weight of the water tank 10 is reduced.

According to the technical scheme of the fourth embodiment, the effect of automatically controlling the opening and closing of the gate 50 can be realized according to the height of the water level of the river channel, manual interference is not needed, and manual consumption is greatly reduced.

The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. A water tank is characterized by comprising a tank body (10) with a cavity inside and a water inlet and outlet mechanism arranged on the tank body (10); the water inlet and outlet mechanism can inject water into the box body (10) or discharge the water in the box body (10) according to the height of the water level of the river channel.

2. The water tank as claimed in claim 1, wherein the water inlet and outlet means comprises a pressure equalizing hole (21) and a water inlet provided on a top wall of the tank body (10) and communicating an inner space and an outer space of the tank body (10);

wherein, the water inlet is provided with a siphon (25), and one end of the siphon (25) extends to the bottom of the box (10) from the water inlet and the other end extends to the bottom of the box (10).

3. A tank according to claim 2, characterized in that the siphon (25) is provided with a solenoid valve for opening and closing the siphon (25).

4. The water tank according to claim 1, characterized in that it further comprises an air-closing means, which is fixed in position and comprises a flexible sealing sheet (81) and a connecting rod (82), said connecting rod (82) extending into said tank (10) through said air pressure balancing hole (21), and its end located inside said tank (10) is provided with said flexible sealing sheet (81).

5. The water tank as claimed in claim 1, wherein the water inlet and outlet mechanism comprises:

the air pressure balancing hole (21) is positioned at the top of the box body (10);

the water inlet is positioned on the box body (10);

the water inlet pipe (22) is positioned at the water inlet, one end of the water inlet pipe is connected with the water inlet, and the other end of the water inlet pipe is provided with a water pump (23); the water inlet pipe (22) is provided with a one-way valve, and the one-way valve is used for only allowing liquid to enter the box body (10) along the water inlet pipe (22);

a water outlet arranged on the bottom wall of the box body (10);

an electromagnetic valve (24) provided at the drain port for opening and closing the drain port;

the distance sensor is positioned on the box body (10) and used for monitoring the liquid level height below the box body (10);

the controller is respectively and electrically connected with the distance sensor, the water pump (23) and the electromagnetic valve (24); the device is used for receiving signals collected by the distance sensor, opening and closing the electromagnetic valve (24) according to the signals and controlling the working state of the water pump (23).

6. A gate opening and closing device, characterized by comprising a gate (50), a pulley assembly and a water tank according to any one of claims 1 to 4; the pulley assembly comprises a pulley block and a flexible cable; one end of the flexible cable is connected with the box body (10), and the other end of the flexible cable bypasses the pulley block and is connected with the gate (50); the gate 50 is opened or closed by increasing or decreasing the weight of the tank 10 by injecting water into the tank 10 or discharging water from the tank 10.

7. A method of controlling a gate opening and closing device, comprising the gate opening and closing device of claim 6, the method comprising:

injecting liquid into the tank (10) or discharging the liquid in the tank (10) by using a siphon principle to increase or decrease the weight of the tank (10) to open or close the gate (50).

8. The gate opening and closing device control method according to claim 7, characterized in that the highest point of the siphon (25) and the box body (10) are placed between the river level and the normal river level in the flood period, the water inlet end of the siphon (25) is always placed in the river and below the normal river level, and the box body (10) is placed outside the river.

9. The gate opening and closing device control method according to claim 8, characterized in that when the water level of the river channel is higher than the highest point of the siphon (25), the water in the river channel flows into the box body (10) to increase the weight of the box body (10) so as to draw the gate (50) to open;

when the river water level is lower than the water level in the box body (10), the water in the box body (10) is discharged to reduce the weight of the box body (10), so that the gate (50) is pulled to be closed.

10. The gate hoist control method of claim 7, characterized in that the flexible cable includes a first flexible cable (61) and a second flexible cable (62), the pulley block includes a first pulley (631) and a second pulley (632); one end of the first flexible cable (61) is connected with the box body (10), and the other end of the first flexible cable is connected with a balancing weight (70) by bypassing the first pulley (631); one end of the second flexible cable (62) is connected with the balancing weight (70), and the other end of the second flexible cable is connected with the gate by bypassing the second pulley (632);

when the water level of the river channel is higher than the highest point of the siphon (25), the water in the river channel flows into the box body (10) to increase the weight of the box body (10), so that the gate (50) is pulled to be closed;

when the river water level is lower than the water level in the tank body (10), the water in the tank body (10) is drained to reduce the weight of the tank body (10), thereby pulling the gate (50) to open.