Farmland water diversion port regulation and control gate structure

Abstract

The invention 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 regulating gates, and in particular to a regulating gate structure for farmland water diversion outlets. Background Art

[0002] The channel water diversion outlet is an important building for water volume distribution and scheduling in the irrigation area's water conveyance channels. In actual operation, the water conveyance system distributes the flow according to the water demand and adjustable water volume, and controls and schedules through the check gate and the diversion gate, and conveys the distributed water volume to the irrigation location. The check gate is a sluice built in the channel to regulate the upstream water level and control the downstream flow, often built downstream of the diversion gate and the drainage gate to raise the water level to play the role of water diversion and drainage. The diversion gate is a sluice built at the bifurcation of the irrigation channel to distribute the water conveyance volume, and distributes the upstream channel inflow to the downstream channels in proportion, and can also be used as a water measurement facility.

[0003] The regulating hydraulic performance of the gate can directly affect the engineering safety, stability and economic benefits. At present, researchers have studied more on the flow rate and water level changes under the regulation of check gates with different shapes and sizes at the trapezoidal channel water diversion outlet, but there is less research on the influence of the layout method and position of the diversion gate on the regulation ability and flow passing law of the main channel water level and flow rate. And by exploring the layout method and position of the diversion gate, it helps to improve the channel water volume distribution and water resource utilization efficiency, and enhance the accuracy of channel irrigation. Therefore, improvement is needed. Summary of the Invention

[0004] In order to improve the channel water volume distribution and water resource utilization efficiency, and enhance the accuracy of channel irrigation, this application provides a regulating gate structure for farmland water diversion outlets.

[0005] A regulating gate structure for farmland water diversion outlets provided by this application adopts the following technical solution: A regulating gate structure for farmland water diversion outlets includes a lower movable gate, an upper fixed gate, a gate frame, a fixator, 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 prevent water leakage;

[0007] The upper fixed gate is rigidly connected to the gate frame, and the lower movable gate is slidably fitted in the gate frame along the vertical direction through the slide rail in the gate frame, and the lower movable gate is 2-3 cm longer than the upper fixed gate;

[0008] The chain is composed of several closed chain links, the chain is fixed to the top of the lower movable gate through a fixator, and a pull ring is connected to the top end of the chain;

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

[0010] A stilling basin and a filter well are arranged downstream of the side channel. The bottom elevation of the stilling basin is lower than that of the side channel bottom, and the filter well is paved with dry-laid stone masonry.

[0011] Optionally, rubber waterstops are arranged 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 a waterstop steel plate is embedded in the gate frame, with a thickness ≥ 3 mm and a width ≥ 10 cm.

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

[0013] The slide rails in 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 of the chain are marked with different colors to indicate the opening levels, including fully open, half open and one-quarter open; the radius of the pull ring is 4 cm, and when the gate is fully closed, it is completely sleeved on the fixed rod.

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

[0016] The fixator is a 90° angle steel. One side of the fixator is installed on the lower movable gate, and the other side of the fixator is drilled and provided for the installation of the chain.

[0017] Optionally, the ratio of the apron length of the stilling basin to the channel width is 1:1.5 - 2.0. An anti-scouring groove is arranged at the end of the filter well. The length of the filter well ≥ 3 times the width of the side channel, and the surface slope of the filter well ≤ 1:10.

[0018] Optionally, scale marks are provided on the fixed rod, and the scale marks correspond to the opening percentage and flow value of the lower movable gate, with an accuracy error ≤ 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 rails in the gate frame are made of galvanized steel. The bottom of the gate frame is embedded in the main channel and is flush with the bottom elevation of the main channel; a slide rail limit groove is arranged at the lower part of the upper fixed gate to prevent the gate from shifting.

[0021] Optionally, counterweights are arranged at the bottom of the lower movable gate. The weight of the counterweights is 1.2 - 1.5 times the weight of the lower movable gate, which is used to enhance the closing tightness.

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

[0023] 1. By moving the lower movable gate up and down in the limiting direction to adjust the opening of the gate hole and measure the upstream and downstream water levels, and controlling and measuring the flow rate of the opposite channel based on the principle of flow through the gate hole. When in use, the regulating gate structure is installed before filling the main channel to regulate and control the flow rate, and can be disassembled after the filling is completed; the regulating gate structure is easy to assemble and implement, can adjust and control the flow rate, has high measurement accuracy, achieves the purpose of water supply on demand, and meets the irrigation requirements;

[0024] 2. When the gate frame limits the lower movable gate and the upper fixed gate, a small change in the clear width will occur. The side contraction effect during gate flow can be ignored. The upper part of the gate frame limits the maximum opening of the movable gate and controls the maximum flow rate. The lower part of the gate frame has a good water blocking and sediment blocking effect when the lower movable gate is completely closed;

[0025] 3. A simple reduced apron type stilling basin and a filter well are arranged downstream of the side channel. The bottom elevation of the stilling basin is lower than the bottom of the side channel, forming a certain length of pool depth and pool length. The function of the stilling basin is to raise the downstream water level, slow down the flow velocity, make the water flow connect with the downstream water surface more smoothly, and the stilling basin can dissipate the energy of the far - driving hydraulic jump generated behind the gate, make the water flow stable, reduce the downstream Froude number, make the water flow change from a rapid flow state to a sub - critical flow state, and reduce the scouring effect on the soil of the outlet farmland during actual irrigation; the position of the stilling basin can be manually controlled for excavation, and the hydraulic jump is used for energy dissipation. If the flow behind the gate is submerged outflow, that is, when the gate opening is large, the stilling basin can be not set; the filter well is paved with mortar - laid stones to make the water flow evenly diffuse and gradually adjust the flow velocity distribution to be close to the water flow form of the farmland. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the regulating gate structure of the embodiment of the present application;

[0027] Figure 2 is a front view of the regulating gate structure of the embodiment of the present application;

[0028] Figure 3 is a left view of the regulating gate structure of the embodiment of the present application;

[0029] Figure 4 is a top view of the regulating gate structure of the embodiment of the present application;

[0030] Figure 5 is a schematic sectional structural diagram of the regulating gate structure of the embodiment of the present application;

[0031] Figure 6 is a schematic structural diagram of the main channel and the side channel of the embodiment of the present application;

[0032] Figure 7 It is the dimensional drawing when the gate structure is regulated and closed in the embodiment of the present application;

[0033] Figure 8 It is the dimensional drawing when the gate structure is regulated and opened in the embodiment of the present application.

[0034] Reference numerals: 1, lower movable gate; 2, upper fixed gate; 3, gate frame; 4, fixator; 5, chain; 6, fixing rod; 7, pull ring; 8, main channel; 9, stilling basin; 10, apron. Detailed implementation manners

[0035] The following further describes the present application in detail in combination with the attached Figure 1-8 drawings.

[0036] The embodiment of the present application discloses a regulating gate structure for a farmland water diversion port. As Figures 1 to 8 shown, a regulating gate structure for a farmland water diversion port includes a lower movable gate 1, an upper fixed gate 2, a gate frame 3, a fixator 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 by screws and nuts, and the contact surface is sealed with glass glue to prevent water leakage.

[0038] The upper fixed gate 2 is rigidly connected to the gate frame 3. The lower movable gate 1 is slidably matched with the gate frame 3 along the vertical direction through the slide rail in the gate frame 3. The lower movable gate 1 is placed in contact with the upper fixed gate 2, and the lower movable gate 1 is 2-3 cm longer than the upper fixed gate 2, which is convenient for preventing water seepage when closed and flexible lifting when opened. By moving the lower movable gate 1 up and down in the limit direction, the opening of the gate hole is adjusted and the water levels upstream and downstream are measured. The flow rate of the side channel is controlled and measured based on the principle of gate hole outflow. When in use, the regulating gate structure is installed before the main channel 8 is filled with water to regulate and control the flow rate, and can be disassembled after the irrigation is completed; the regulating gate structure is easy to assemble and implement, can adjust and control the flow rate, has high measurement accuracy, achieves the purpose of water supply on demand, and meets the irrigation requirements.

[0039] Rubber water stop strips are provided 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, and a water stop steel plate is embedded in the gate frame 3 with a thickness ≥ 3 mm and a width ≥ 10 cm; 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, which have strong weather resistance and anti-aging properties. The transmission components are surface-treated with high-quality structural steel, which is wear-resistant, corrosion-resistant, and reduces friction and opening / closing force.

[0040] The slide rail in 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 sliding rails inside the gate frame 3 are made of galvanized steel. The bottom of the gate frame 3 is embedded in the main channel 8 and is flush with the bottom elevation of the main channel 8. When the lower movable gate 1 is fully closed, only the main channel 8 allows water to flow through, reducing seepage. The lower part of the upper fixed gate 2 is provided with a sliding rail limit 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 - 0.5 mm and a hardness of ≥ HV800.

[0043] The widths of the lower movable gate 1 and the upper fixed gate 2 can be set according to the dimensions of the side channels. The net width of the water flow is not restricted by the side contraction coefficient ε, where ε = b / B. When only the gate structure is provided at the water diversion outlet, the influence of the side contraction coefficient on the water flow is very small 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 influence of side contraction during the water flow through the gate can be ignored. The upper part of the gate frame 3 limits the maximum opening of the movable gate and controls the maximum flow rate. The lower part of the gate frame 3 produces a good water blocking and sediment blocking effect when the lower movable gate 1 is completely closed.

[0045] The gate frame 3 adapts to the side slope coefficient of the main channel 8. When laying out, the net width of the gate can be calculated according to whether the gate frame 3 fits the side channel wall of the main channel 8 or is embedded inside the main channel 8. The gate frame 3 fitting the side channel wall of the main channel 8 can avoid damaging the main channel 8 and is convenient for installation and disassembly. 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 single-sided gate frame 3, and the value range of d is 2 - 4 cm.

[0046] The thickness of the lower movable gate 1 is 3 mm - 2 cm. Increasing the thickness can increase the support strength of the lower movable gate 1 and reduce the scouring of the lower movable gate 1. Moreover, the lower movable gate 1 can be reversely installed on the other side of the gate frame 3 to realize the adjustment of the opening direction and has no influence on the water flow capacity.

[0047] A counterweight is provided at the bottom of the lower movable gate 1, and the weight of the counterweight is 1.2 - 1.5 times the weight of the lower movable gate 1, which is used to enhance the closing tightness.

[0048] The fixer 4 is a 90° angle steel. One side of the fixer 4 is installed on the lower movable gate 1, and the other side of the fixer 4 is drilled and provided for the installation of the chain 5.

[0049] The chain 5 is composed of several closed chain links. The chain links are mutually closed and connected. When lifted, the chain links are subjected to force and form a regular tightening shape along the direction of the acting force. When adjusted to the appropriate opening, the corresponding chain links can be sleeved into the fixing rod 6 for fixing the opening.

[0050] The net length of the link is 2 cm and the net width is 1.5 cm. The chain 5 is fixed to the top of the lower movable gate 1 through the fixer 4, and a pull ring 7 is connected to the top end of the chain 5. The pull ring 7 is larger in size than the link. The radius of the pull ring 7 is 4 cm, which is convenient for manual lifting and for being sleeved into the fixing rod 6 for fixation; the links of the chain 5 are marked with opening levels in different colors, including fully open, half open and one-quarter open; the radius of the pull ring 7 is 4 cm, and when the gate is fully closed, it is completely sleeved into the fixing rod 6.

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

[0052] A simple stilling basin 9 with a reduced apron and a filter apron 10 are arranged downstream of the side channel. The bottom elevation of the stilling basin 9 is lower than the bottom of the side channel, forming a certain pool depth and pool length. The ratio of the apron length of the stilling basin 9 to the channel width 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, make the water flow connect with the downstream water surface more smoothly, and the stilling basin 9 can dissipate the energy of the supercritical hydraulic jump generated behind the gate, make the water flow stable, reduce the downstream Froude number, make the water flow change from a rapid flow state to a subcritical flow state, and reduce the scouring effect on the outlet farmland soil during actual irrigation; the position of the stilling basin 9 can be manually controlled for excavation to dissipate energy using the hydraulic jump. If the outflow behind the gate is a submerged outflow, that is, when the gate opening is large, the stilling basin 9 can be not provided; an erosion control trench is arranged at the end of the filter apron 10. The length of the filter apron 10 ≥ 3 times the width of the side channel, and the surface slope of the filter apron 10 ≤ 1:10. The filter apron 10 is laid with rubble masonry to make the water flow evenly diffuse and gradually adjust the flow velocity distribution to be close to the water flow pattern of the farmland.

[0053] It should be noted that the gate structure of the present application can be placed in a fitting manner for the main channel 8 with different side slope coefficients during layout. When the side channel has no water flow, the water retaining effect of the gate structure is the same as that of the wall of the main channel 8.

[0054] The implementation principle of the regulating gate structure for the farmland water diversion outlet in the embodiments of this application is as follows: The lower movable gate 1 moves up and down in the limiting direction to adjust the opening of the gate hole and measure the water levels upstream and downstream. The flow rate of the opposite channel is controlled and measured based on the principle of gate hole outflow. When in use, the regulating gate structure is installed before the main channel 8 is irrigated to regulate and control the flow rate, with high measurement accuracy, achieving the purpose of water supply on demand and meeting the irrigation requirements; the stilling basin 9 raises the downstream water level and slows down the flow velocity, making the water flow connect with the downstream water surface more smoothly. Moreover, the stilling basin 9 can dissipate the energy of the supercritical hydraulic jump generated behind the gate, making the water flow stable, reducing the downstream Froude number, and changing the water flow from a rapid flow state to a subcritical flow state, reducing the scouring effect on the soil of the outlet farmland during actual irrigation; an anti-scouring groove is provided at the end of the apron 10, and the apron 10 is laid with rubble masonry to evenly disperse the water flow and gradually adjust the flow velocity distribution to be close to the water flow pattern of the farmland.

[0055] The above are all the preferred embodiments of this application. Without restricting the protection scope of this application based on this, therefore: All equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A farmland water diversion gate control structure, characterized in that: It comprises a lower movable gate (1), an upper fixed gate (2), a gate frame (3), a fixer (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 and watertight using glass glue; The upper fixed gate (2) is rigidly connected to the gate frame (3), and the lower movable gate (1) is slidably matched with the gate frame (3) along the vertical direction through the slide rail in the gate frame (3), and the lower movable gate (1) is 2-3 cm longer than the upper fixed gate (2); The chain (5) is composed of a plurality of closed chain links, the chain (5) is fixed to the top of the lower movable gate (1) through a fixing device (4), and a pull ring (7) is connected to the top of the chain (5); The fixing rod (6) is vertically mounted on the upper part of the gate frame (3), and the pull ring (7) is inserted into the fixing rod (6) to lock the opening of the lower movable gate (1); An energy dissipation pool (9) and ambush (10) are arranged downstream of the side channel. The bottom elevation of the energy dissipation pool (9) is lower than the bottom of the side channel, and the ambush (10) is paved with mortar masonry.

2. A farmland water diversion gate control structure according to claim 1, characterized in that: A rubber water stop strip is provided between the contact surface between the upper fixed gate (2) and the gate frame (3) and between the contact surface between the lower movable gate (1) and the gate frame (3), and a water stop steel plate is embedded in the gate frame (3) with a thickness of ≥3 mm and a width of ≥10 cm.

3. The farmland water diversion control gate structure according to claim 1, characterized in that: The gate frame (3) is adapted to the slope coefficient of the main channel (8), and the net width of the lower movable gate (1) and the upper fixed gate (2) is calculated by the formula b=B-2d, where B is the total width of the gate structure, d is the width of the single-side gate frame, and the value range of d is 2-4 cm; The slide rails in the gate frame (3) are 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 water diversion control 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 levels, including fully open, half open and one quarter open; the pull ring (7) has a radius of 4 cm and is completely inserted into the fixing rod (6) when the gate is fully closed.

5. The farmland water diversion control gate structure according to claim 1, characterized in that: The lower movable gate (1) has a thickness of 3 mm to 2 cm and can be reversely installed on the other side of the gate frame (3) to achieve adjustment of the opening direction; The fixer (4) is a 90° angle steel, one side of the fixer (4) is mounted on the lower movable gate (1), and the other side of the fixer (4) has a hole for mounting a chain (5).

6. The farmland water diversion gate control structure according to claim 1, characterized in that: The ratio of the length of the apron of the energy dissipation pool (9) to the width of the channel is 1:1.5-2.0, an anti-scouring groove is arranged at the end of the apron (10), the length of the apron (10) is ≥3 times the width of the side channel, and the surface slope of the apron (10) is ≤1:

10.

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

8. The farmland water diversion gate control 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 0.2-0.5 mm and a hardness of ≥ HV800.

9. The farmland water diversion control gate structure according to claim 1, characterized in that: The slide rail in 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 flush with the bottom of the main channel (8). A slide rail limit groove is provided at the bottom of the upper fixed gate (2) to prevent the gate from shifting.

10. The farmland water diversion control gate structure according to claim 1, characterized in that: A counterweight block is arranged at the bottom of the lower movable gate (1), and the weight of the counterweight block is 1.2-1.5 times the weight of the lower movable gate (1) and is used to enhance the closing sealing performance.

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