Farmland water diversion port regulation and control gate structure

Abstract

The utility model relates to the technical field of regulation and control gates, in particular to a farmland water diversion port regulation and control gate structure which comprises a lower movable gate, an upper fixed gate, a gate frame, a fixator, a chain and a fixing rod. The gate frame is fixed at the boundary of the main channel and the side channel, and the contact surface is sealed by glass cement; the upper fixed gate is in rigid connection with the gate frame, the lower movable gate is in sliding fit with the gate frame in the vertical direction through a sliding rail in the gate frame, and the lower movable gate is 2-3 cm longer than the upper fixed gate; the chain is composed of a plurality of closed chain rings and fixed to the top of the lower movable gate through a fixator, and the top end of the chain is connected with a pull ring. The fixed rod is vertically installed on the upper portion of the gate frame, and the pull ring is sleeved with the fixed rod to lock the opening degree of the lower movable gate. A stilling pool and an apron are arranged on the downstream of the side channel, and the apron is laid by masonry. According to the method, the channel water distribution and water resource utilization efficiency can be improved, and the channel irrigation accuracy is enhanced.

Description

Technical Field

[0001] This application relates to the technical field of control gates, and in particular to a control gate structure for a farmland water diversion outlet. Background Technology

[0002] The water distribution inlet of an irrigation canal is a crucial structure for water allocation and regulation within the irrigation district. In actual operation, the water conveyance system distributes flow based on demand and available capacity, controlling the flow through control gates and diversion gates to deliver the allocated water to the irrigation locations. Control gates, built within the canal, regulate upstream water levels and control downstream flow. They are typically located downstream of diversion and spillway gates, raising the water level to divert and discharge water. Diversion gates, located at the branching points of the irrigation canal, distribute the flow from the upper canal proportionally to the lower canal and can also function as water measurement facilities.

[0003] The hydraulic performance of gates directly affects the safety, stability, and economic benefits of engineering projects. Currently, researchers have conducted extensive studies on the flow rate and water level changes of diversion gates in trapezoidal channels under the control of gates of different shapes and sizes. However, there is less research on the impact of the layout and location of diversion gates on the control capacity and flow patterns of the main channel's water level and flow. Exploring the layout and location of diversion gates can help improve the efficiency of channel water distribution and water resource utilization, and enhance the precision of channel irrigation. Therefore, improvements are needed. Utility Model Content

[0004] In order to improve the efficiency of water distribution and water resource utilization in canals and enhance the precision of canal irrigation, this application provides a farmland water diversion gate structure.

[0005] The present application provides a farmland water diversion gate structure, which adopts the following technical solution: A farmland water diversion gate structure includes a lower movable gate, an upper fixed gate, a gate frame, a fixer, a chain, and a fixing rod;

[0006] The gate frame is fixed at the boundary between the main channel and the side channel, and the contact surface is sealed with glass glue to stop water.

[0007] The upper fixed gate is rigidly connected to the gate frame, and the lower movable gate slides vertically to the gate frame via a slide rail inside the gate frame. The lower movable gate is 2-3cm longer than the upper fixed gate.

[0008] The chain consists of several closed links. The chain is fixed to the top of the lower movable gate by a retainer, and a pull ring is connected to the top of the chain.

[0009] The fixing rod is installed vertically on the upper part of the gate frame, and the pull ring locks the opening of the lower movable gate by fitting it into the fixing rod;

[0010] A stilling basin and a seawall are set at the downstream of the side channel. The bottom elevation of the stilling basin is lower than that of the bottom of the side channel, and the seawall is paved with masonry.

[0011] Optionally, rubber waterstop strips are provided between the contact surfaces of the upper fixed gate and the gate frame, and between the contact surfaces of the lower movable gate and the gate frame, and waterstop steel plates with a thickness of ≥3mm and a width of ≥10cm are pre-embedded in the gate frame.

[0012] Optionally, the gate frame is adapted to the slope coefficient of the main channel. The net width calculation formula for the lower movable gate and the upper fixed gate is b=B-2d, where B is the total width of the gate structure and d is the width of the gate frame on one side, and the value of d is 2-4cm.

[0013] The sliding rails inside the gate frame are adapted to the sides of the lower movable gate and the upper fixed gate to limit the horizontal displacement of the lower movable gate and the upper fixed gate.

[0014] Optionally, the chain links are marked with different colors to indicate the opening level, including fully open, half open and quarter open; the pull ring has a radius of 4cm and is completely fitted into the fixing rod when the gate is fully closed.

[0015] Optionally, the thickness of the lower movable gate is 3mm-2cm, and it can be installed in reverse on the other side of the gate frame to achieve adjustment of the opening direction;

[0016] The fixing device is a 90° angle steel. One side of the fixing device is installed on the lower movable gate, and the other side of the fixing device has an opening for the installation of the chain.

[0017] Optionally, the ratio of the length of the apron to the width of the channel in the stilling basin is 1:1.5-2.0, an anti-scour groove is provided at the end of the apron, the length of the apron is ≥ 3 times the width of the side channel, and the surface slope of the apron is ≤ 1:10.

[0018] Optionally, the fixed rod is provided with scale markings, which correspond to the opening percentage and flow rate of the lower movable gate, with an accuracy error of ≤5%.

[0019] Optionally, the surfaces of the lower movable gate and the upper fixed gate are coated with a wear-resistant ceramic coating with a thickness of 0.2-0.5 mm and a hardness ≥ HV800.

[0020] Optionally, the slide rail inside the gate frame is made of galvanized steel, and the bottom of the gate frame is embedded in the main channel and is flush with the bottom of the main channel; the lower part of the upper fixed gate is provided with a slide rail limiting groove to prevent the gate from shifting.

[0021] Optionally, a counterweight is provided at the bottom of the lower movable gate, the weight of which is 1.2-1.5 times the weight of the lower movable gate, to enhance the closure and sealing performance.

[0022] In summary, this application includes the following beneficial technical effects:

[0023] 1. The lower movable gate moves up and down in the limiting direction to adjust the gate opening and measure the upstream and downstream water levels. It controls and measures the flow rate of the opposite channel based on the gate outlet principle. When in use, the regulating gate structure is installed before irrigation of the main channel to regulate and control the flow rate. It can be disassembled after irrigation. The regulating gate structure is easy to assemble and implement, and can regulate and control the flow rate. It has high measurement accuracy and achieves the purpose of supplying water on demand to meet irrigation needs.

[0024] 2. When the gate frame limits the lower movable gate and the upper fixed gate, it will cause a small change in the net width. The side contraction effect when the gate is overflowing is negligible. The upper part of the gate frame limits the maximum opening of the movable gate and controls the maximum flow. The lower part of the gate frame produces a good water blocking and sand blocking effect when the lower movable gate is fully closed.

[0025] 3. A simple stilling basin and a weir are set up downstream of the side channel. The bottom elevation of the stilling basin is lower than that of the side channel, forming a certain depth and length of basin. The function of the stilling basin is to raise the downstream water level, slow down the flow velocity, and make the water flow more smoothly connect to the downstream water surface. The stilling basin can also dissipate energy from the long-range hydraulic jump generated after the gate, so as to stabilize the water flow, reduce the downstream Froude number, and change the water flow from a rapid flow to a slow flow state, reducing the scouring effect on the farmland soil during actual irrigation. The location of the stilling basin can be manually controlled and excavated to dissipate energy using the hydraulic jump. If the outflow after the gate is submerged, that is, when the gate opening is large, the stilling basin may not be required. The weir is paved with masonry to make the water flow evenly diffused and gradually adjust the flow velocity distribution to a water flow pattern close to that of the farmland. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the control gate structure according to an embodiment of this application;

[0027] Figure 2 This is a front view of the regulating gate structure according to an embodiment of this application;

[0028] Figure 3 This is a left view of the regulating gate structure according to an embodiment of this application;

[0029] Figure 4 This is a top view of the regulating gate structure according to an embodiment of this application;

[0030] Figure 5 This is a cross-sectional view of the control gate structure according to an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the main channel and side channel in an embodiment of this application;

[0032] Figure 7 This is a dimensional diagram of the control gate structure in the embodiment of this application when it is closed;

[0033] Figure 8 This is a dimensional diagram of the control gate structure when it is opened according to an embodiment of this application.

[0034] Reference numerals in the attached diagram: 1. Lower movable gate; 2. Upper fixed gate; 3. Gate frame; 4. Fixer; 5. Chain; 6. Fixing rod; 7. Pull ring; 8. Main channel; 9. Stilling basin; 10. Drainage basin. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0036] This application discloses a structure for regulating a farmland water diversion gate. For example... Figures 1 to 8 As shown, a farmland water diversion gate structure includes a lower movable gate 1, an upper fixed gate 2, a gate frame 3, a fixing device 4, a chain 5, and a fixing rod 6.

[0037] The gate frame 3 is fixed at the boundary between the main channel 8 and the side channel and is fixedly connected with screws and threaded sleeves. The contact surface is sealed with glass glue to stop water.

[0038] The upper fixed gate 2 is rigidly connected to the gate frame 3, and the lower movable gate 1 slides vertically along the gate frame 3 via a slide rail inside the gate frame 3. The lower movable gate 1 is placed close to the upper fixed gate 2, and the lower movable gate 1 is 2-3cm longer than the upper fixed gate 2 to facilitate water seepage prevention when closed and flexible lifting when opened. The lower movable gate 1 moves up and down in the limiting direction to adjust the gate opening and measure the upstream and downstream water levels. The flow rate of the opposite channel is controlled and measured based on the gate outlet principle. In use, the regulating gate structure is installed before irrigation of the main channel 8 to regulate and control the flow rate, and can be disassembled after irrigation. The regulating gate structure is easy to assemble and implement, can regulate and control the flow rate, has high measurement accuracy, achieves the purpose of supplying water on demand, and meets irrigation needs.

[0039] Rubber waterstop strips are installed between the contact surfaces of the upper fixed gate 2 and the gate frame 3, and between the contact surfaces of the lower movable gate 1 and the gate frame 3. Waterstop steel plates with a thickness of ≥3mm and a width of ≥10cm are pre-embedded in the gate frame 3. Rubber seals are used between the lower movable gate 1 and the gate frame 3, and between the upper fixed gate 2 and the gate frame 3. The seals are weather-resistant and anti-aging. The transmission components are made of high-quality structural steel with surface treatment, which is wear-resistant and corrosion-resistant, reducing friction and opening / closing force.

[0040] The slide rail inside the gate frame 3 is adapted to the sides of the lower movable gate 1 and the upper fixed gate 2 to limit the horizontal displacement of the lower movable gate 1 and the upper fixed gate 2.

[0041] The slide rail inside the gate frame 3 is made of galvanized steel. The bottom of the gate frame 3 is embedded in the main channel 8 and is level with the bottom of the main channel 8. When the lower movable gate 1 is fully closed, it ensures that only the main channel 8 flows through, reducing water seepage. The lower part of the upper fixed gate 2 is provided with a slide rail limiting groove to prevent the gate from shifting.

[0042] The surfaces of the lower movable gate 1 and the upper fixed gate 2 are coated with a wear-resistant ceramic coating with a thickness of 0.2-0.5mm and a hardness ≥HV800.

[0043] The width of the lower movable gate 1 and the upper fixed gate 2 can be set according to the size of the side channel. The net width of the flow is not limited by the side contraction coefficient ε, where ε = b / B. When the water distribution outlet is only equipped with a gate structure, the side contraction coefficient has little effect on the flow and does not need to be considered.

[0044] When the gate frame 3 limits the lower movable gate 1 and the upper fixed gate 2, it will cause a small change in the net width. The side contraction effect when the gate is overflowing is negligible. The upper part of the gate frame 3 limits the maximum opening of the movable gate and controls the maximum flow. The lower part of the gate frame 3 produces a good water blocking and sand blocking effect when the lower movable gate 1 is completely closed.

[0045] The gate frame 3 is adapted to the slope coefficient of the main channel 8. When laying out the gate, the net width of the gate can be calculated based on whether the gate frame 3 is attached to the side wall of the main channel 8 or embedded in the main channel 8. The gate frame 3 being attached to the side wall of the main channel 8 can avoid damaging the main channel 8 and facilitate assembly and disassembly. The formula for calculating the net width of the lower movable gate 1 and the upper fixed gate 2 is b=B-2d, where B is the total width of the gate structure and d is the width of the gate frame 3 on one side. The value of d ranges from 2 to 4 cm.

[0046] The thickness of the lower movable gate 1 is 3mm-2cm. Increasing the thickness can increase the support strength of the lower movable gate 1 and reduce the scouring of the lower movable gate 1. The lower movable gate 1 can be installed in the opposite direction on the other side of the gate frame 3 to realize the adjustment of the opening direction without affecting the flow capacity.

[0047] The bottom of the lower movable gate 1 is equipped with a counterweight block, the weight of which is 1.2-1.5 times the weight of the lower movable gate 1, to enhance the closure and sealing performance.

[0048] The fixing device 4 is a 90° angle steel. One side of the fixing device 4 is installed on the lower movable gate 1, and the other side of the fixing device 4 has an opening for the installation of the chain 5.

[0049] Chain 5 consists of several closed links that are interconnected. When pulled, the links are subjected to force and form a regular tightening shape along the direction of the force. When the appropriate opening is adjusted, the corresponding links can be inserted into the fixing rod 6 to fix the opening.

[0050] The chain link has a net length of 2cm and a net width of 1.5cm. The chain 5 is fixed to the top of the lower movable gate 1 by the fixing device 4, and the top of the chain 5 is connected to a pull ring 7. The pull ring 7 is larger than the chain link and has a radius of 4cm, which makes it easy to lift manually and easy to fit into the fixing rod 6 for fixing. The chain links of the chain 5 are marked with different colors to indicate the opening level, including fully open, half open and quarter open. The pull ring 7 has a radius of 4cm and is fully fitted into the fixing rod 6 when the gate is fully closed.

[0051] The fixing rod 6 is vertically welded to the upper part of the gate frame 3. The pull ring 7 locks the opening degree of the lower movable gate 1 by fitting it into the fixing rod 6. The fixing rod 6 is provided with scale marks, which correspond to the opening percentage and flow rate of the lower movable gate 1, with an accuracy error of ≤5%.

[0052] A simple stilling basin 9 with a lowered apron and a seawall 10 are installed downstream of the side channel. The bottom elevation of the stilling basin 9 is lower than that of the side channel, forming a basin of a certain depth and length. The ratio of the length of the apron of the stilling basin 9 to the width of the channel is 1:1.5-2.0. The function of the stilling basin 9 is to raise the downstream water level, slow down the flow velocity, and make the water flow more smoothly connect to the downstream water surface. In addition, the stilling basin 9 can dissipate energy from the long-range hydraulic jump generated after the gate, so as to stabilize the water flow, reduce the downstream Froude number, and transform the water flow from a rapid flow to a smooth flow. The slow flow reduces the scouring effect on the farmland soil during actual irrigation; the stilling basin 9 can be manually excavated to dissipate energy using hydraulic jump; if the outflow after the gate is submerged, i.e., the gate opening is large, the stilling basin 9 may not be required; the end of the sluice gate 10 is equipped with an anti-scouring trough, the length of the sluice gate 10 is ≥ 3 times the width of the side channel, the surface slope of the sluice gate 10 is ≤ 1:10, and the sluice gate 10 is paved with masonry to ensure uniform water flow and gradually adjust the flow velocity distribution to a pattern close to that of farmland.

[0053] It is worth noting that the gate structure of this application can be fitted to the main channel 8 with different slope coefficients during the installation process. When the side channel does not pass through, the water-blocking effect of the gate structure is the same as the water-blocking effect of the wall of the main channel 8.

[0054] The implementation principle of the farmland water diversion gate structure in this application embodiment is as follows: the lower movable gate 1 moves up and down in the limiting direction to adjust the gate opening and measure the upstream and downstream water levels. The flow rate of the opposite channel is controlled and measured based on the gate outlet principle. When in use, the regulating gate structure is installed before irrigation in the main channel 8 to regulate and control the flow rate. It has high measurement accuracy and achieves the purpose of supplying water on demand to meet irrigation needs. The stilling basin 9 raises the downstream water level and slows down the flow velocity, so that the water flow can connect to the downstream water surface more smoothly. The stilling basin 9 can also dissipate the energy of the long-distance hydraulic jump generated after the gate, so that the water flow is stable, the downstream Froude number is reduced, and the water flow changes from a rapid flow to a slow flow state, reducing the scouring effect on the farmland soil at the outlet during actual irrigation. The end of the seawall 10 is equipped with an anti-scouring trough, and the seawall 10 is paved with masonry to make the water flow evenly diffused and gradually adjust the flow velocity distribution to a water flow pattern close to that of the farmland.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A regulating gate structure for farmland irrigation diversion, characterized in that: It includes a lower movable gate (1), an upper fixed gate (2), a gate frame (3), a fixture (4), a chain (5), and a fixing rod (6); The gate frame (3) is fixed at the boundary between the main channel (8) and the side channel, and the contact surface is sealed with glass glue to stop water. The upper fixed gate (2) is rigidly connected to the gate frame (3), and the lower movable gate (1) slides vertically to the gate frame (3) through the slide rail inside the gate frame (3), and the lower movable gate (1) is 2-3cm longer than the upper fixed gate (2). The chain (5) is composed of several closed links. The chain (5) is fixed to the top of the lower movable gate (1) by a fixing device (4), and a pull ring (7) is connected to the top of the chain (5). The fixing rod (6) is vertically installed on the upper part of the gate frame (3), and the pull ring (7) locks the opening of the lower movable gate (1) by fitting it into the fixing rod (6); A stilling basin (9) and a seawall (10) are set downstream of the side channel. The bottom elevation of the stilling basin (9) is lower than that of the bottom of the side channel, and the seawall (10) is paved with masonry.

2. The farmland irrigation diversion gate structure according to claim 1, characterized in that: Rubber waterstop strips are provided between the contact surfaces of the upper fixed gate (2) and the gate frame (3) and between the lower movable gate (1) and the gate frame (3), and waterstop steel plates with a thickness ≥3mm and a width ≥10cm are pre-embedded in the gate frame (3).

3. The farmland irrigation diversion gate structure according to claim 1, characterized in that: The gate frame (3) is adapted to the slope coefficient of the main channel (8). The net width calculation formula for the lower movable gate (1) and the upper fixed gate (2) is b=B-2d, where B is the total width of the gate structure and d is the width of the gate frame on one side. The value of d is 2-4cm. The slide rail inside the gate frame (3) is adapted to the sides of the lower movable gate (1) and the upper fixed gate (2) to limit the horizontal displacement of the lower movable gate (1) and the upper fixed gate (2).

4. The farmland irrigation diversion gate structure according to claim 1, characterized in that: The chain links of the chain (5) are marked with different colors to indicate the opening level, including fully open, half open and quarter open; the pull ring (7) has a radius of 4cm and is completely inserted into the fixing rod (6) when the gate is fully closed.

5. The farmland irrigation diversion gate structure according to claim 1, characterized in that: The lower movable gate (1) is 3mm-2cm thick and can be installed in reverse on the other side of the gate frame (3) to adjust the opening direction; The fixing device (4) is a 90° angle steel. One side of the fixing device (4) is installed on the lower movable gate (1), and the other side of the fixing device (4) has an opening for the installation of the chain (5).

6. The farmland irrigation diversion gate structure according to claim 1, characterized in that: The ratio of the length of the stilling basin (9) to the width of the channel is 1:1.5-2.

0. An anti-scouring groove is provided at the end of the seawall (10). The length of the seawall (10) is ≥ 3 times the width of the side channel, and the surface slope of the seawall (10) is ≤ 1:

10.

7. The farmland irrigation diversion gate structure according to claim 1, characterized in that: The fixed rod (6) is provided with scale markings, which correspond to the opening percentage and flow rate of the lower movable gate (1), with an accuracy error of ≤5%.

8. The farmland irrigation diversion gate structure according to claim 1, characterized in that: The surfaces of the lower movable gate (1) and the upper fixed gate (2) are coated with a wear-resistant ceramic coating with a thickness of 0.2-0.5mm and a hardness ≥HV800.

9. The farmland irrigation diversion gate structure according to claim 1, characterized in that: The slide rail inside the gate frame (3) is made of galvanized steel. The bottom of the gate frame (3) is embedded in the main channel (8) and is level with the bottom of the main channel (8). The lower part of the upper fixed gate (2) is provided with a slide rail limiting groove to prevent the gate from shifting.

10. The farmland irrigation diversion gate structure according to claim 1, characterized in that: The lower movable gate (1) is equipped with a counterweight at its bottom. The weight of the counterweight is 1.2-1.5 times that of the lower movable gate (1) to enhance the sealing performance.

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