Water tank outlet water level control system

Abstract

The utility model discloses a water tank outlet water level control system, which is characterized by comprising a gate valve device, a water level detection device and a water level gate valve control circuit, the gate valve device comprises a gate plate vertically arranged at an outlet of the water tank, a rotatable threaded rod is upwards arranged on the upper surface of the gate plate, the upper end of the threaded rod is matched with a nut which is horizontally arranged and limited up and down in a screwed mode, and teeth are arranged on the outer surface of the nut to enable a driven gear and a driving gear to be meshed. The driving gear is mounted on a main shaft of a water level motor; the water level gate valve control circuit is connected with the water level motor and used for detecting the water level of the water tank outlet and controlling the water gate plate to move downwards or upwards. The utility model has the advantage that the water level at the outlet of the water tank can be automatically adjusted and controlled conveniently, quickly and accurately, so that the water tank test can be conveniently carried out, and the reliability of the water tank test result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic engineering test research, and particularly relates to a water level control system at the outlet of a flume. Background Technique

[0002] Flume test is an important means to carry out hydraulic engineering research. During the process of hydraulic engineering research, flume tests are often carried out to simulate and analyze the hydraulic state of hydraulic engineering. Among them, many flume tests need to control the boundary conditions at the outlet of the flume. For example, when we want to study the characteristics of sediment movement in the river flowing into the sea with variable incoming flow through flume tests, considering that although the incoming flow of the river channel is constantly changing and continuously injected into the sea, the proportion of the incoming flow in a short period is very small compared with the sea capacity, and the water supply of the river in a short period will not cause obvious rise or fall of the sea level. Therefore, in specific tests, the above inlet and outlet boundary conditions are usually generalized as the situation where the inlet flow changes while the outlet water level remains constant, and it is necessary to keep the water level at the outlet of the flume constant during the test.

[0003] In the prior art when conducting such tests, in order to keep the water level at the outlet of the flume constant, the current conventional method is to arrange a gate at the outlet of the flume and arrange a test personnel to stay near the gate to manually adjust the water level. This method not only consumes manpower but also has poor accuracy.

[0004] Therefore, how to better control the water level at the outlet of the flume, make it convenient to adjust, and finally improve the reliability of the test results has become a problem to be considered and solved by those skilled in the art. Content of the Utility Model

[0005] Aiming at the deficiencies of the above prior art, the technical problem to be solved by the utility model is: how to provide a water level control system at the outlet of a flume that can better realize the adjustment and control of the water level at the outlet of the test flume to improve the reliability of the test results.

[0006] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0007] A water tank outlet water level control system, characterized in that it includes a gate valve device, a water level detection device and a water level gate valve control circuit arranged at the water tank outlet position; the gate valve device includes a gate plate vertically arranged at the water tank outlet position, the lower end of the gate plate is immersed in the water tank and an outlet is formed between the lower end of the gate plate and the bottom surface of the water tank, both sides of the gate plate are slidably installed in corresponding chutes on the inner walls of both sides of the water tank, a rotatable threaded rod is arranged upward on the upper surface of the gate plate, the upper end of the threaded rod is screwed and matched with a horizontally arranged nut that is vertically limited, teeth are arranged on the outer surface of the nut and a passive gear is formed on the outer circle, the passive gear meshes with an active gear, and the active gear is installed on the main shaft of a water level motor; the water level gate valve control circuit is connected to the water level motor, the water level detection device is used to detect the water level at the water tank outlet and output a low water level signal and a high water level signal, when the water level gate valve control circuit receives the low water level signal, it controls the water level motor to rotate forward and drives the gate plate to move downward, and when the water level gate valve control circuit receives the high water level signal, it controls the water level motor to rotate reversely and drives the gate plate to move upward.

[0008] In this way, after water level detection, relying on the water level gate valve control circuit to drive the water level motor to perform forward and reverse control output, and then driving the gate valve to move up and down through the lead screw-nut transmission structure. When the water level is low, the gate valve moves downward to reduce the height of the lower outlet to raise the water level, and when the water level is high, the gate valve moves upward to increase the height of the lower outlet to lower the water level, realizing constant control of the water level with a simple structure and stable and reliable control.

[0009] Furthermore, the water level detection device includes a water level float well arranged at the water tank outlet, the lower end of the water level float well is communicated with the water tank, a water level float is floatingly arranged in the water level float well, a water level detection lifting rod is vertically fixed on the upper edge of the water level float, a water level signal output structure is arranged at the upper end of the water level detection lifting rod, the water level signal output structure includes an insulating section in the middle and two conductive sections at the upper and lower ends of the insulating section, a conductive ring that is relatively fixed to the water level float well is slidably sleeved on the insulating section, and the two conductive sections and the conductive ring are both connected to the water level gate valve control circuit and used to output a low water level signal and a high water level signal.

[0010] In this way, when the water level rises, the water level detection lifting rod rises following the water level float, so that the conductive ring contacts the lower conductive section to output a high water level signal. When the water level drops, the water level detection lifting rod drops following the water level float, so that the conductive ring contacts the upper conductive section to output a low water level signal; therefore, it has the advantages of simple structure, sensitive detection, and stable and reliable water level signal output.

[0011] Furthermore, the conductive ring is fixed on a horizontally arranged connecting rod, and the connecting rod is fixed on a fixed support at the upper end of the water level float well. This facilitates the fixation of the conductive ring.

[0012] Furthermore, the upper and lower ends of the conductive ring are frustum-shaped that bulge outward in the up and down directions, and the lower end surface of the upper conductive section and the upper end surface of the lower conductive section are correspondingly concave frustum-shaped grooves.

[0013] In this way, it can better facilitate the contact between the conductive ring and the conductive section, and more reliably output the water level detection signal.

[0014] Furthermore, the upper half of the water level detection lifting rod is provided with an external thread and is screwed and fitted with a first sleeve. The first sleeve is made of insulating material and forms the insulating section on its outer surface. The outer surface of the first sleeve is provided with an external thread and is screwed and fitted with a second sleeve at each of its upper and lower ends. The second sleeve is made of conductive material and is used to form two conductive sections.

[0015] In this way, it can not only adjust the control water level height by adjusting the position of the first sleeve on the water level detection lifting rod, but also adjust the range of the controllable water level height by adjusting the positions of the two second sleeves on the first sleeve. And it has the advantages of simple structure, convenient and reliable adjustment, etc.

[0016] Furthermore, the water level gate valve control circuit includes a power supply and two symmetrically arranged electromagnetic double-control switches. The electromagnetic double-control switch has a contact rod. One end of the contact rod is provided with a rotating shaft so that the other end can be rotatably arranged. On one side of the rotating end of the contact rod, a forward control electromagnet and a forward output fixed contact are respectively arranged. The forward control electromagnet acting on the contact rod can drive the contact rod to rotate and connect to the forward output fixed contact. On the other side of the rotating end of the contact rod, a reverse control electromagnet and a reverse output fixed contact are symmetrically arranged. The reverse control electromagnet acting on the contact rod can drive the contact rod to rotate and connect to the reverse output fixed contact. The electromagnetic double-control switch also includes a control spring. The control spring is connected to the contact rod and is used to keep the contact rod in the disconnected state in the middle of the two contacts when the contact rod is not affected by the electromagnetic force;

[0017] The positive pole of the power supply is sequentially connected to the contact rod of the first electromagnetic double-control switch and the conductive ring of the water level detection device through the water level control output line. The lower conductive section is externally connected to the water level forward control line. The water level forward control line is sequentially connected to the forward control electromagnets of the first electromagnetic double-control switch and the second electromagnetic double-control switch and then connected back to a water level control return line. The water level control return line is connected to the negative pole of the power supply; The forward output fixed contact of the first electromagnetic double-control switch is connected to the positive pole connector of the water level motor through a line. The forward output fixed contact of the second electromagnetic double-control switch is connected to the negative pole connector of the water level motor through a line. The contact rod of the second electromagnetic double-control switch is connected to the water level control return line;

[0018] The conductive section above the conductive ring is externally connected to a water level reverse control circuit. The water level reverse control circuit is sequentially connected to the reverse control electromagnet of the first electromagnetic double-control switch and the reverse control electromagnet of the second electromagnetic double-control switch, and then connected back to the water level control return circuit; the reverse output fixed contact of the first electromagnetic double-control switch is connected to the negative terminal of the water level motor through a circuit, and the reverse output fixed contact of the second electromagnetic double-control switch is connected to the positive terminal of the water level motor through a circuit.

[0019] In this way, the above water level gate valve control circuit adopts two symmetrically arranged electromagnetic double-control switches and is cleverly connected, which can achieve the effect of supplying power to both the water level detection signal and the water level motor output by only relying on one power supply device, and can realize the forward and reverse rotation output of the water level motor according to different water level detection height signals. The circuit structure is ingenious and realizes the automatic detection and control process.

[0020] In summary, the utility model has the advantages of being able to conveniently, quickly and accurately realize the automatic adjustment and control of the water level at the outlet of the water tank, making it convenient to carry out the water tank test and improving the reliability of the water tank test results. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the water level control system at the outlet of the water tank adopted when the utility model is implemented. The arrow in the figure indicates the water flow direction.

[0022] Figure 2 is Figure 1 a schematic diagram of the separate water level signal output structure part in Detailed Description of the Preferred Embodiments

[0023] The following further detailed description of the present invention will be made in conjunction with the specific embodiments.

[0024] Embodiment 1: The realization of a water outlet control system at the outlet of a water tank is shown in Figure 1 - Figure 2, including a gate valve device, a water level detection device and a water level gate valve control circuit arranged at the water tank outlet position; the gate valve device includes a gate plate 1 vertically arranged at the water tank outlet position, the lower end of the gate plate 1 is immersed in the water tank and a water outlet is formed between the lower end of the gate plate and the bottom surface of the water tank, both sides of the gate plate 1 are slidably mounted in corresponding sliding grooves on the inner walls of both sides of the water tank, a rotatable threaded rod 2 is arranged upward on the upper surface of the gate plate, the upper end of the threaded rod 2 is screwed and matched with a horizontally arranged nut 3 which is limited up and down, teeth are arranged on the outer surface of the nut 3 and a passive gear is formed on the outer ring, the passive gear meshes with an active gear, and the active gear is mounted on the main shaft of a water level motor 5; the water level gate valve control circuit is connected to the water level motor 5, the water level detection device is used for detecting the water level at the water tank outlet and outputting a low water level signal and a high water level signal, when the water level gate valve control circuit receives the low water level signal, it controls the water level motor to rotate forward and drives the gate plate to move downward, and when the water level gate valve control circuit receives the high water level signal, it controls the water level motor to rotate reversely and drives the gate plate to move upward.

[0025] In this way, after water level detection, relying on the water level gate valve control circuit to drive the water level motor to perform forward and reverse rotation control output, and then driving the gate valve to move up and down through the lead screw-nut transmission structure. When the water level is low, the gate valve moves downward to reduce the height of the lower water outlet to raise the water level, and when the water level is high, the gate valve moves upward to increase the height of the lower water outlet to lower the water level, realizing the constant control of the water level with simple structure and stable and reliable control.

[0026] Among them, the water level detection device includes a water level float well 6 arranged at the water tank outlet, the lower end of the water level float well 6 is communicated with the water tank, a water level float 7 is floatingly arranged in the water level float well, a water level detection lifting rod 8 is vertically fixed on the upper edge of the water level float 7, a water level signal output structure is arranged at the upper end of the water level detection lifting rod 8, the water level signal output structure includes an insulating section 9 in the middle and two conductive sections at the upper and lower ends of the insulating section, a conductive ring 10 relatively fixed to the water level float well is slidably sleeved on the insulating section, and the two conductive sections and the conductive ring 10 are both connected to the water level gate valve control circuit and used for outputting a low water level signal and a high water level signal.

[0027] In this way, when the water level rises, the water level detection lifting rod rises following the water level float, so that the conductive ring contacts the lower conductive section to output a high water level signal. When the water level drops, the water level detection lifting rod drops following the water level float, so that the conductive ring contacts the upper conductive section to output a low water level signal; therefore, it has the advantages of simple structure, sensitive detection, stable and reliable water level signal output, etc.

[0028] Among them, the conductive ring 10 is fixed on a horizontally arranged connecting rod 11, and the connecting rod 11 is fixed on a fixed support 12 at the upper end of the water level float well. This facilitates the fixing of the conductive ring.

[0029] Among them, the upper and lower ends of the conductive ring 10 are frustum-shaped protruding outward in the up and down directions, and the lower end surface of the upper conductive section and the upper end surface of the lower conductive section are correspondingly concave frustum-shaped grooves.

[0030] In this way, it can better facilitate the contact between the conductive ring and the conductive section, and more reliably output the water level detection signal.

[0031] Among them, an external thread is provided on the upper half of the water level detection lifting rod 8, and a first sleeve 13 is rotatably connected and fitted. The first sleeve 13 is made of insulating material and forms the insulating section on its outer surface. External threads are provided on the outer surface of the first sleeve 13, and a second sleeve 14 is rotatably connected and fitted at each of its upper and lower ends. The second sleeve 14 is made of conductive material and is used to form two conductive sections.

[0032] In this way, the adjustment of the control water level height can be achieved by adjusting the position of the first sleeve on the water level detection lifting rod, and the adjustment of the range of the controllable water level height can be achieved by adjusting the positions of the two second sleeves on the first sleeve. And it has the advantages of simple structure, convenient and reliable adjustment, etc.

[0033] Among them, the water level gate valve control circuit includes a power supply 15 and two symmetrically arranged electromagnetic double-control switches. The electromagnetic double-control switch has a contact rod 16. One end of the contact rod 16 is provided with a rotating shaft so that the other end can be rotatably arranged. On one side of the rotating end of the contact rod 16, a forward control electromagnet 17 and a forward output fixed contact 18 are respectively arranged. The forward control electromagnet 17 acting on the contact rod 16 can drive the contact rod to rotate and connect to the forward output fixed contact 18. On the other side of the rotating end of the contact rod, a reverse control electromagnet 19 and a reverse output fixed contact 20 are symmetrically arranged. The reverse control electromagnet 19 acting on the contact rod 16 can drive the contact rod to rotate and connect to the reverse output fixed contact 20. The electromagnetic double-control switch also includes a control spring 21. The control spring 21 is connected to the contact rod 16 and is used to keep the contact rod in the open state between the two contacts when it is not affected by electromagnetic force;

[0034] The positive electrode of the power supply 15 is connected to the contact rod of the first electromagnetic double-control switch and the conductive ring 10 of the water level detection device in sequence through the water level control output line 22. The conductive section located below is externally connected with a water level forward control line 23. The water level forward control line 23 is connected to the forward control electromagnet 17 of the first electromagnetic double-control switch and the forward control electromagnet of the second electromagnetic double-control switch in sequence, and then connected back to a water level control return line 24. The water level control return line 24 is connected to the negative electrode of the power supply 15; the forward output fixed contact 18 of the first electromagnetic double-control switch is connected to the positive electrode connector 25 of the water level motor 5 through a line, the forward output fixed contact of the second electromagnetic double-control switch is connected to the negative electrode connector 26 of the water level motor 5 through a line, and the contact rod of the second electromagnetic double-control switch is connected to the water level control return line;

[0035] The conductive section above the conductive ring 10 is externally connected with a water level reverse control line 27. The water level reverse control line 27 is connected to the reverse control electromagnet 19 of the first electromagnetic double-control switch and the reverse control electromagnet of the second electromagnetic double-control switch in sequence, and then connected back to the water level control return line 24; the reverse output fixed contact 20 of the first electromagnetic double-control switch is connected to the negative electrode connector 26 of the water level motor 5 through a line, and the reverse output fixed contact of the second electromagnetic double-control switch is connected to the positive electrode connector 25 of the water level motor 5 through a line.

[0036] In this way, the above water level gate valve control circuit adopts two symmetrically arranged electromagnetic double-control switches and is cleverly connected, which can achieve the effect of supplying power to both the water level detection signal and the water level motor output by only relying on one power supply device, and can realize the forward and reverse rotation output of the water level motor according to different water level detection height signals. The circuit structure is ingenious and the automatic detection and control process is realized.

Claims

1. A water level control system for a water tank outlet, characterized in that: The utility model comprises a gate valve device arranged at the outlet of a water tank, a water level detection device and a water level gate valve control circuit; the gate valve device comprises a gate plate arranged vertically at the outlet of the water tank, the lower end of the gate plate is immersed in the water tank and a water outlet is formed between the lower end of the gate plate and the bottom surface of the water tank, the two sides of the gate plate can be slidably installed in corresponding slide grooves on the inner walls of the two sides of the water tank, a rotatable threaded rod is arranged upward on the upper surface of the gate plate, the upper end of the threaded rod is screwed with a nut arranged horizontally and limited by upper and lower positions, the outer surface of the nut is provided with teeth and a passive gear is formed on the outer ring, the passive gear is meshed with the active gear, and the active gear is installed on the main shaft of a water level motor; the water level gate valve control circuit is connected to the water level motor, the water level detection device is used to detect the water level at the outlet of the water tank and output a low water level signal and a high water level signal, when the water level gate valve control circuit receives a low water level signal, the water level motor is controlled to rotate forward and drive the gate plate to move downward, and when the water level gate valve control circuit receives a high water level signal, the water level motor is controlled to reverse and drive the gate plate to move upward.

2. The water level control system of the water tank outlet according to claim 1, characterized in that: The water level detection device comprises a water level float well arranged at the outlet of the water tank, the lower end of the water level float well is connected to the water tank, a water level float is floated in the water level float well, a water level detection lifting rod is vertically fixed on the upper edge of the water level float, a water level signal output structure is arranged on the upper end of the water level detection lifting rod, the water level signal output structure comprises an insulating section located in the middle and two conductive sections located at the upper and lower ends of the insulating section, a conductive ring relatively fixed to the water level float well is slidably sleeved on the insulating section, the two conductive sections and the conductive ring are connected to the water level gate valve control circuit and are used to output low water level signals and high water level signals.

3. The water level control system of the water tank outlet according to claim 2, characterized in that: The conductive ring is fixed on a horizontally arranged connecting rod, and the connecting rod is fixed on a fixed support at the upper end of the water level float well.

4. The water level control system of the water tank outlet according to claim 2, characterized in that: The upper and lower ends of the conductive ring are in the shape of a cone convex in the up and down directions, and the lower end surface of the upper conductive segment and the upper end surface of the lower conductive segment are in the shape of a corresponding concave cone groove.

5. The water level control system of the water tank outlet according to claim 2, characterized in that: The upper half of the water level detection lifting rod is provided with an external thread and is screwed together with a first sleeve. The first sleeve is made of insulating material and the insulating section is formed on its outer surface. The outer surface of the first sleeve is provided with an external thread and a second sleeve is screwed together at each of its upper and lower ends. The second sleeve is made of conductive material and is used to form two conductive sections.

6. The water level control system of a water tank outlet according to claim 1, characterized in that: The water level gate valve control circuit includes a power supply and two symmetrically arranged electromagnetic double-control switches, the electromagnetic double-control switch has a touch rod, a rotating shaft is set at one end of the touch rod so that the other end can be rotatably set, and a forward control electromagnet and a forward output fixed contact are respectively set on one side of the rotating end of the touch rod, and the forward control electromagnet acts on the touch rod to drive the touch rod to rotate until it is connected with the forward output fixed contact, and a reverse control electromagnet and a reverse output fixed contact are symmetrically arranged on the other side of the rotating end of the touch rod, and the reverse control electromagnet acts on the touch rod to drive the touch rod to rotate until it is connected with the reverse output fixed contact, and the electromagnetic double-control switch also includes a control spring, which is connected to the touch rod and is used to keep the touch rod in a disconnected state between the two contacts when the touch rod is not subjected to electromagnetic force; The positive pole of the power supply is connected to the touch rod of the first electromagnetic double-control switch and the conductive ring of the water level detection device in sequence through the water level control output circuit, and the conductive section located below is externally connected to a water level positive control circuit, and the water level positive control circuit is connected to the positive control electromagnet of the first electromagnetic double-control switch and the positive control electromagnet of the second electromagnetic double-control switch in sequence, and then connected back to a water level control return circuit, and the water level control return circuit is connected to the negative pole of the power supply; the positive output fixed contact of the first electromagnetic double-control switch is connected to the positive pole connector of the water level motor through the circuit, the positive output fixed contact of the second electromagnetic double-control switch is connected to the negative pole connector of the water level motor through the circuit, and the touch rod of the second electromagnetic double-control switch is connected to the water level control return circuit; The conductive segment above the conductive ring is externally connected to a water level reverse control circuit, which is connected in sequence to the reverse control electromagnet of the first electromagnetic double-control switch and the reverse control electromagnet of the second electromagnetic double-control switch, and then connected back to the water level control return circuit; the reverse output fixed contact of the first electromagnetic double-control switch is connected to the negative pole connector of the water level motor through the circuit, and the reverse output fixed contact of the second electromagnetic double-control switch is connected to the positive pole connector of the water level motor through the circuit.

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