Automatic water cutoff mechanism and method of using same

Abstract

The application discloses an automatic water cutoff gate mechanism and a use method thereof. The automatic water cutoff gate mechanism comprises a gate plate which is hinged to the upstream and downstream junction of a water channel in a transverse direction and can intercept water flow by rotating, and the gate plate is provided with a counterweight which can move along the length direction perpendicular to the rotating shaft of the gate plate; when the gate plate rotates to the state that the downstream end is higher than the upstream end under the action of water flow impact and / or buoyancy, the counterweight can move from the downstream end to the upstream end under the action of gravity to drive the gate plate to rotate to the closed state. The use method comprises the steps of adjusting a floating body, moving the counterweight, automatically intercepting water and resetting, etc. The process that the automatic water cutoff gate mechanism changes from the normal water supply state to the water cutoff and supply stop state is completely controlled by the height of the downstream water level, and neither additional electronic devices are needed to realize monitoring and driving, nor manual intervention is needed, so that the cost can be reduced, the reliability can be improved, and the occupation of manpower can be avoided.

Description

Technical Field

[0001] This invention relates to the field of hydraulic gate valve technology, and in particular to an automatic water-cutting gate mechanism and its usage method. Background Technology

[0002] When the water level downstream of the canal outlet reaches the design value, water supply needs to be cut off, usually by closing a gate. Existing gates mostly use manual or electric methods for closure. Manual closure requires dedicated personnel for real-time monitoring; when the downstream water level reaches the design value, the gate is closed manually. Electric closure requires a linked detection and drive mechanism; when the drive mechanism receives a signal from the detection mechanism indicating that the downstream water level has reached the design value, it actuates the gate valve. It is clear that while manual closure is cheaper, it requires additional manpower and cannot achieve automated control. While electric closure eliminates human intervention, the detection and drive mechanisms increase the cost of the gate valve, and the reliability of electronic components gradually decreases over long-term use, potentially leading to failure. Therefore, there is an urgent need for an automatic gate that requires neither manual intervention nor electronic components, and can close solely based on the downstream water level. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an automatic water interception gate mechanism and its usage method.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An automatic water-blocking gate mechanism includes a gate plate that is laterally hinged at the junction of the upstream and downstream sections of a water channel and can intercept water flow by rotation. The gate plate is equipped with a counterweight that can move in the upstream and downstream directions. When the gate plate rotates to a position where its downstream end is higher than its upstream end under the impact of water flow and / or buoyancy, the counterweight can move from the downstream end to the upstream end under the action of gravity, thereby driving the gate plate to rotate to a closed state.

[0006] As a further improvement to the above technical solution:

[0007] The bottom plate of the water channel is formed with a reverse slope or a sealing threshold at the junction of the upstream and downstream sections. The bottom edge of the gate in the closed state is tightly fitted with the reverse slope or the sealing threshold. The contact surface between the reverse slope and the gate, or the contact surface between the sealing threshold and the gate, is provided with a sealing water-stop strip and / or mutually attractive magnetic bodies.

[0008] The sidewall of the water channel has a protrusion formed at the junction of the upstream and downstream sections. When the gate is closed, the side edge of the gate is in close contact with the protrusion. The contact surface between the protrusion and the gate is provided with a sealing water-stop strip and / or mutually attractive magnetic bodies.

[0009] The water channel has a breast wall formed at the junction of the upstream and downstream sections. A rotating shaft is installed below the breast wall, and a gate is hinged to the rotating shaft. A buffer strip is provided on the contact surface between the gate and the breast wall.

[0010] The upstream end of the gate is bent upward.

[0011] The gate is formed with a sliding groove along the upstream and downstream direction, and the sliding groove is filled with a counterweight.

[0012] The groove is configured as a sealed structure.

[0013] The downstream end is equipped with a float, which can drive the gate to rotate under the buoyancy exerted on it by the downstream water flow.

[0014] The float is vertically adjustable and installed at the downstream end.

[0015] Then, the present invention discloses a method of using an automatic water-blocking gate mechanism, the method of which is applied to the above-mentioned automatic water-blocking gate mechanism and includes the following steps:

[0016] Step S1: Adjust the buoy's descent depth according to the downstream water level design value.

[0017] Step S2: Move the counterweight to the downstream end of the gate so that the float floats on the downstream water surface.

[0018] In step S3, under the buoyancy of the downstream water flow, the float pushes the gate to rotate until the downstream end is higher than the upstream end. At this time, the counterweight moves from the downstream end to the upstream end under the action of gravity, thereby forcing the upstream end to sink until the gate is in a closed state.

[0019] Step S4: When the downstream water level is lower than the design value, move the counterweight to the downstream end of the gate to reset it.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] The automatic water cut-off gate mechanism is completely controlled by the downstream water level, which changes the water supply status from normal to interrupted. It does not require additional electronic devices for monitoring and driving, nor does it require manual intervention. This reduces costs and improves reliability while eliminating the need for manpower. Attached Figure Description

[0022] Figure 1 This is a cross-sectional schematic diagram of the automatic water-cutting gate mechanism in Embodiment 1;

[0023] Figure 2 This is a top view of the automatic water-blocking gate mechanism in Embodiment 1;

[0024] Figure 3This is a schematic diagram of the automatic closing process of the automatic water interception gate mechanism in Example 2;

[0025] Figure 4 This is a side view of the gate, counterweight, and float in Embodiment 2;

[0026] Figure 5 This is a top view of the gate, counterweight, and float in Embodiment 2;

[0027] Figure 6 This is a flowchart illustrating the operation of an automatic water-blocking gate mechanism.

[0028] The labels in the diagram represent: 1. Water channel; 11. Reverse slope; 12. Sealing threshold; 13. Boss; 14. Breast wall; 15. Rotating shaft; 2. Gate; 21. Downstream end; 22. Upstream end; 23. Slide groove; 3. Counterweight; 4. Float. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figure 1 and Figure 2 As shown, the automatic water-blocking gate mechanism of this embodiment includes a gate plate 2 that is laterally hinged at the junction of the upstream and downstream sides of the water channel 1 and can intercept water flow by rotation. The gate plate 2 is equipped with a counterweight 3 that can move in the upstream and downstream directions. When the gate plate 2 rotates to its downstream end 21 being higher than its upstream end 22 under the impact of water flow and / or buoyancy, the counterweight 3 can move from the downstream end 21 to the upstream end 22 under the action of gravity, thereby driving the gate plate 2 to rotate to a closed state. When water is supplied downstream through the water channel 1, the water flows from the upstream to the downstream side of the water channel 1. At this time, the downstream end 21 of the gate plate 2 installed at the junction of the upstream and downstream sides forms a gap with the bottom of the water channel 1 under the impact of water flow and / or the action of buoyancy of downstream water flow, and the water flows through this gap. When the downstream water level gradually rises to the design value, the impact of water flow on the gate plate 2 combined with the buoyancy of downstream water flow on the gate plate 2 pushes its downstream end 21 to gradually rise (i.e., Figure 1The gate 2 rotates counterclockwise until the downstream end 21 is higher than the upstream end 22. At this time, the counterweight 3 begins to move from the downstream end 21 to the upstream end 22 under its own weight. After it crosses the rotation axis of the gate 2, the counterweight 3 exerts downward pressure on the upstream end 22, thereby forming a counterclockwise rotational torque around the rotation axis 15. The gate 2 continues to rotate under the action of this torque until the gate 2 closes the water channel 1, thereby achieving water cut-off (i.e., the gate 2 blocks the upstream water flow to the downstream). When the downstream water level recedes to below the design value and it is necessary to restore the downstream water supply, the gate 2 only needs to be rotated in the opposite direction until the counterweight 3 moves from the upstream end 22 back to the downstream end 21. It can be seen that in this embodiment, the process of the automatic water-cutting gate mechanism changing from the normal water supply state to the water cut-off state is completely controlled by the height of the downstream water level. It does not require additional electronic devices for monitoring and driving, nor does it require manual intervention, thus reducing costs and improving reliability while eliminating the need for manpower.

[0032] In this embodiment, a sealing threshold 12 is formed at the junction of the upstream and downstream sections of the bottom plate of the water channel 1. The bottom edge of the gate 2 in the closed state is tightly fitted with the sealing threshold 12. The contact surface between the sealing threshold 12 and the gate 2 is provided with a sealing water-stop strip and mutually attracting magnetic bodies. A boss 13 is formed at the junction of the upstream and downstream sections of the side wall of the water channel 1. The side edge of the gate 2 in the closed state is tightly fitted with the boss 13. The contact surface between the boss 13 and the gate 2 is provided with a sealing water-stop strip and mutually attracting magnetic bodies. By setting the sealing threshold 12 on the bottom plate of the water channel 1 and setting the boss 13 on the side wall of the water channel 1, when the gate 2 is rotated to the closed state, its bottom edge and side edge can be blocked by the sealing threshold 12 and the boss 13 to prevent the gate 2 from rotating excessively and causing its bottom edge to recreate a gap that allows water to flow through with the bottom plate of the water channel 1. On the other hand, this tightly fitted structure can also block the water flow. Furthermore, to further improve sealing performance, sealing strips are provided on the mating surfaces of the sealing sill 12 and the gate 2, and on the mating surfaces of the boss 13 and the gate 2. When the edge of the gate 2 is mated with the sealing sill 12 and the boss 13 respectively, the elastic sealing strips are squeezed and filled into the gaps in the mating surfaces, thereby further blocking the water flow. At the same time, mutually attractive magnetic bodies are also provided on the mating surfaces of the sealing sill 12 and the gate 2, and on the mating surfaces of the boss 13 and the gate 2. The attraction of the magnetic bodies makes the mating between the gate 2 and the sealing sill 12 and between the gate 2 and the boss 13 more tight, and can also effectively prevent the gate 2 from automatically loosening from the sealing sill 12 and between the gate 2 and the boss 13.

[0033] In this embodiment, a breast wall 14 is formed at the junction of the upstream and downstream sections of the water channel 1. A rotating shaft 15 passes through the bottom of the breast wall 14, and a gate 2 is hinged to the rotating shaft 15. A buffer strip is provided on the contact surface between the gate 2 and the breast wall 14. By setting the breast wall 14, the flow cross-section of the water can be restricted when the upstream water level is too high, while the rotating shaft 15 provides a hinged base for the gate 2. The rotating shaft 15 passes through the water channel 1 perpendicular to the water flow direction. One end of the shaft is fixed to one side wall of the water channel 1, and the other end is fixed to the other side wall of the water channel 1. It passes through the hinge seat formed in the middle of the gate 2, allowing the gate 2 to rotate around the rotating shaft 15. By providing a buffer strip on the contact surface between the gate 2 and the breast wall 14, the gate 2 can avoid a hard collision with the breast wall 14 when rotating to the closed state, thereby protecting the gate 2 and the breast wall 14. Meanwhile, the buffer strip also has a sealing function, which can prevent water leakage from occurring between the gate 2 and the breast wall 14 when the water level upstream of the water channel 1 is higher than the contact surface between the gate 2 and the breast wall 14. Specifically, the buffer strip can be set as an elastic rubber strip or a foam strip, etc.

[0034] In this embodiment, a float 4 is provided at the downstream end 21. The float 4 can drive the gate 2 to rotate under the buoyancy exerted on it by the downstream water flow. The float 4 is vertically adjustable and installed at the downstream end 21. By providing the float 4 at the downstream end 21 of the gate 2, the float 4 can use the buoyancy generated by the water flow to push the gate 2 to rotate. In this embodiment, the float 4 floats on the water surface so that the downstream end 21 of the gate 2 does not contact the water flow. In other embodiments, the float 4 can also be submerged in the water flow, which is not particularly limited here. Moreover, the connection between the float 4 and the downstream end 21 is set to be vertically adjustable. By moving the float 4, its depth relative to the downstream end 21 can be changed, thereby adapting to different downstream water level design values. Specifically, a nut can be provided on the downstream end 21, and a screw can be provided vertically on the upper end of the float 4. The screw is inserted into the nut, and the depth of the float 4 relative to the downstream end 21 can be changed by screwing it.

[0035] Example 2

[0036] like Figures 3 to 5As shown, the second embodiment of the automatic water-blocking gate mechanism of the present invention is basically the same as that of embodiment 1, except that: in this embodiment, the bottom plate of the water channel 1 is formed with a reverse slope 11 at the junction of the upstream and downstream, and the bottom edge of the gate plate 2 in the closed state is tightly fitted with the reverse slope 11; the contact surface between the reverse slope 11 and the gate plate 2 is provided with a sealing water-stop strip and mutually attracting magnetic bodies. The side wall of the water channel 1 is formed with a boss 13 at the junction of the upstream and downstream, and the side edge of the gate plate 2 in the closed state is tightly fitted with the boss 13; the contact surface between the boss 13 and the gate plate 2 is provided with a sealing water-stop strip and mutually attracting magnetic bodies. By setting a reverse slope 11 on the bottom plate of the water channel 1 and a protrusion 13 on the side wall of the water channel 1, when the gate 2 rotates to the closed state, its bottom edge and side edge can be blocked by the reverse slope 11 and the protrusion 13 to prevent the gate 2 from rotating excessively and causing its bottom edge to re-create a gap that allows water to flow through with the bottom plate of the water channel 1. On the other hand, this tight-fitting structure can also block the water flow. Moreover, in order to further improve the sealing performance, sealing water-stop strips are also provided on the contact surfaces of the reverse slope 11 and the gate 2, and on the contact surfaces of the protrusion 13 and the gate 2. When the edge of the gate 2 is in contact with the reverse slope 11 and the protrusion 13 respectively, the elastic sealing water-stop strips are squeezed and filled into the gaps of the contact surfaces, thereby further cutting off the water flow. Meanwhile, magnetic bodies that attract each other are provided on the mating surfaces of the reverse slope 11 and the gate plate 2, and on the mating surfaces of the boss 13 and the gate plate 2. The attraction of the magnetic bodies can make the mating between the gate plate 2 and the reverse slope 11 and the gate plate 2 and the boss 13 more compact, and can also effectively prevent the gate plate 2 and the reverse slope 11 and the gate plate 2 and the boss 13 from automatically loosening.

[0037] In this embodiment, the upstream end 22 of the gate 2 is bent upwards. According to the driving principle of the automatic water-cutting gate mechanism, for the gate 2 to change from a normal water supply state to a water-cut-off state, the counterweight 3 needs to move from the downstream end 21 to the upstream end 22 of the gate 2, and the counterweight 3 is driven by its own weight. When the gate 2 is set in a shape where the upstream end 22 is bent upwards, i.e., the gate 2 is in an upward-opening "V" shape, when the downstream water flow lifts the gate 2 to its downstream half (referring to the section from the middle of the gate 2 to the downstream end 21) by buoyancy, it tilts slightly upwards in the direction of the water flow (i.e., the middle of the gate 2 is lower than the downstream end 21, see...). Figure 3 (See diagram of the middle state). The counterweight 3 moves toward the middle of the gate 2. At this time, the upstream half of the gate 2 (from the middle of the gate 2 to the upstream end 22) is still inclined downward in the direction of water flow (i.e., the middle of the gate 2 is lower than the upstream end 22, see diagram). Figure 3(Diagram showing the intermediate state) Under the influence of gravity, the counterweight 3 can only move to the middle of the gate 2 and cannot reach the upstream end 22. Therefore, the gate 2 cannot continue to rotate to the closed state due to the downward pressure of the counterweight 3. If the downstream water level drops, causing the downstream half of the gate 2 to tilt downward in the direction of water flow, the counterweight 3 will move back to the downstream end 21. If the downstream water level continues to rise, causing the upstream half of the gate 2 to tilt upward in the direction of water flow, the counterweight 3 will move to the upstream end 22 and, under its gravity, force the gate 2 to continue rotating to the closed state. Water flow may generate waves under the action of wind or collision. The height of the waves cannot reflect the true water level, but it can drive the float 4 to move. By setting the gate 2 with the upstream end 22 bent upward, when the downstream water level is less than the design value but the water flow generates waves, the float 4 may be pushed up so that the downstream half of the gate 2 tilts slightly upward in the direction of the water flow. However, the counterweight 3 cannot move to the upstream end 22, so it will not drive the gate 2 to rotate to the closed state. In other words, this "V" shaped gate 2 structure can effectively eliminate the influence of waves, thereby avoiding premature closure of the water gate.

[0038] In this embodiment, the gate 2 is formed with a groove 23 along the upstream and downstream direction, and a counterweight 3 is filled in the groove 23. The groove 23 is configured as a sealed structure. The two ends of the groove 23 face the downstream end 21 and the upstream end 22 of the gate 2, respectively, so that the counterweight 3 filled in it can reciprocate at the upstream and downstream ends of the gate 2. The groove 23 can be set on the back side of the gate 2 or on its front side, and the number of grooves in the groove 23 is not limited, nor is the number of counterweights 3 filled in each groove. Preferably, the counterweight 3 is spherical, and both the counterweight 3 and the groove 23 are smooth to reduce resistance. At the same time, in order to avoid the water flow from hindering the movement of the counterweight 3, the groove 23 is configured as a sealed structure.

[0039] Then, as Figure 6 As shown, the present invention also discloses a method for using an automatic water-blocking gate mechanism. In one embodiment, the method is applied to the above-mentioned automatic water-blocking gate mechanism and includes the following steps:

[0040] Step S1: Adjust the descent depth of the float 4 according to the downstream water level design value.

[0041] Step S2: Move the counterweight 3 to the downstream end 21 of the gate 2 so that the float 4 floats on the downstream water surface.

[0042] In step S3, under the buoyancy of the downstream water flow, the float 4 pushes the gate 2 to rotate until the downstream end 21 is higher than the upstream end 22. At this time, the counterweight 3 moves from the downstream end 21 to the upstream end 22 under the action of gravity, thereby forcing the upstream end 22 to sink until the gate 2 is in a closed state.

[0043] Step S4: When the downstream water level is lower than the design value, move the counterweight 3 to the downstream end 21 of the gate 2 to reset it.

[0044] When water is supplied downstream via canal 1, the water flows from upstream to downstream. At this time, the downstream end 21 of the gate 2 installed at the junction of upstream and downstream forms a gap with the bottom of canal 1 under the impact of the water flow and / or the buoyancy of the downstream water flow, and the water flows through this gap. When the downstream water level gradually rises to the design value, the impact of the water flow on the gate 2, combined with the buoyancy of the downstream water flow on the gate 2, pushes the downstream end 21 to gradually rise until the downstream end 21 is higher than the upstream end 22. At this time, the counterweight 3 begins to move from the downstream end 21 towards the upstream end 22 under its own weight. After it crosses the rotation axis of the gate 2, the counterweight 3 exerts downward pressure on the upstream end 22, thereby forming a counterclockwise rotational torque around the rotation axis 15. The gate 2 continues to rotate under the action of this torque until the gate 2 closes the canal 1, thereby achieving the water supply interruption (i.e., the gate 2 blocks the upstream water flow to the downstream). When using the automatic sluice gate mechanism, the initial adjustment of the buoy 4 relative to the gate 2's depth is based on the downstream water level design value. This ensures that when the downstream water level reaches the design value, the buoy 4 pushes the gate 2 upwards, rotating it until the middle of the gate 2 is slightly higher than the upstream end 22. This allows the counterweight 3 to smoothly move from the downstream end 21 to the upstream end 22, driving the gate 2 to rotate into a closed state. Then, by moving the counterweight 3 to the downstream end 21 of the gate 2 and allowing the buoy 4 to float on the downstream water surface, the automatic sluice gate mechanism is in its normally open state. When the downstream water level rises to the design level, the buoy 4, under buoyancy, pushes the gate 2 to rotate until the downstream end 21 is higher than the upstream end 22. At this point, the counterweight 3, under gravity, moves from the downstream end 21 to the upstream end 22, forcing the upstream end 22 to sink until the gate 2 is in a closed state, thus blocking the water flow. Finally, when the downstream water level recedes below the design value and water supply to the downstream needs to be restored, simply rotating the gate 2 in the reverse direction until the counterweight 3 moves from the upstream end 22 to the downstream end 21 will reset the automatic water-blocking gate mechanism, allowing it to regain its automatic water-blocking capability. As can be seen, in this embodiment, the process of the automatic water-blocking gate mechanism changing from a normal water supply state to a water-stopped state is entirely controlled by the downstream water level. It requires neither additional electronic components for monitoring and operation nor manual intervention, thus reducing costs and improving reliability while eliminating the need for manpower.

[0045] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. An automatic water-blocking gate mechanism, characterized in that: The system includes a gate (2) that is laterally hinged at the junction of the upstream and downstream sides of the water channel (1) and can intercept water flow by rotation. The gate (2) is equipped with a counterweight (3) that can move in the upstream and downstream directions. When the gate (2) rotates to its downstream end (21) higher than its upstream end (22) under the impact of water flow and / or buoyancy, the counterweight (3) can move from the downstream end (21) to the upstream end (22) under the action of gravity, thereby driving the gate (2) to rotate to the closed state.

2. The automatic water-blocking gate mechanism according to claim 1, characterized in that: The bottom plate of the water channel (1) is formed with a reverse slope (11) or a sealing threshold (12) at the junction of the upstream and downstream. The bottom edge of the gate (2) in the closed state is closely fitted with the reverse slope (11) or the sealing threshold (12). The mating surface of the reverse slope (11) and the gate (2), or the mating surface of the sealing threshold (12) and the gate (2) is provided with a sealing water-stop strip or / and mutually attractive magnetic bodies.

3. The automatic water-blocking gate mechanism according to claim 2, characterized in that: The sidewall of the water channel (1) has a protrusion (13) formed at the junction of the upstream and downstream. The side edge of the gate (2) in the closed state is closely fitted with the protrusion (13). The mating surface of the protrusion (13) and the gate (2) is provided with a sealing water-stop strip and / or mutually attractive magnetic bodies.

4. The automatic water-blocking gate mechanism according to claim 1, characterized in that: The water channel (1) has a breast wall (14) formed at the junction of the upstream and downstream sections. A rotating shaft (15) is provided below the breast wall (14), and a gate (2) is hinged on the rotating shaft (15). A buffer strip is provided on the contact surface between the gate (2) and the breast wall (14).

5. The automatic water-cutting gate mechanism according to any one of claims 1-4, characterized in that: The upstream end (22) of the gate (2) is bent upward.

6. The automatic water-cutting gate mechanism according to any one of claims 1-4, characterized in that: The gate (2) is formed with a groove (23) along the upstream and downstream direction, and a counterweight (3) is filled in the groove (23).

7. The automatic water-blocking gate mechanism according to claim 6, characterized in that: The groove (23) is configured as a sealed structure.

8. The automatic water-cutting gate mechanism according to any one of claims 1-4, characterized in that: The downstream end (21) is provided with a float (4), which can drive the gate (2) to rotate under the buoyancy exerted on it by the downstream water flow.

9. The automatic water-blocking gate mechanism according to claim 8, characterized in that: The float (4) is vertically adjustable and mounted at the downstream end (21).

10. A method of using an automatic water-blocking gate mechanism, characterized in that: The automatic water-blocking gate mechanism applied to any one of claims 1-9 specifically includes the following steps: Step S1: Adjust the depth of the buoy (4) according to the downstream water level design value; Step S2, move the counterweight (3) to the downstream end (21) of the gate (2) so that the float (4) floats on the downstream water surface; In step S3, under the buoyancy of the downstream water flow, the float (4) pushes the gate (2) to rotate until the downstream end (21) is higher than the upstream end (22). At this time, the counterweight (3) moves from the downstream end (21) to the upstream end (22) under the action of gravity, thereby forcing the upstream end (22) to sink until the gate (2) is in a closed state. Step S4: When the downstream water level is lower than the design value, move the counterweight (3) back to the downstream end (21) of the gate (2) to reset it.

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