Unpowered intercepting gate for automatically controlling runoff discharge of ditch

Abstract

The utility model relates to an unpowered intercepting gate for automatically controlling runoff discharge of a ditch. The unpowered intercepting gate comprises a support frame, a rotating plate (2), a rotating shaft (3), a weight (4), a fixed pulley and a connecting rope (6), one end of the connecting rope (6) bypasses the first fixed pulley (5.1) and then is fixedly connected with the heavy object (4); the other end of the connecting rope (6) bypasses the second fixed pulley (5.2) and then is fixedly connected with the upper part of the rotating plate (2); under the condition that external power is not needed, the intercepting gate is controlled to be automatically opened and closed completely through the synergistic effect of the gravity of the heavy object, the gravity of the rotating plate and the water pressure, it is ensured that when the runoff of the ditch suddenly increases, the intercepting gate can be automatically opened to achieve rapid drainage, and when the runoff of the ditch becomes small, the intercepting gate can be automatically closed to intercept more runoff; the problems of short retention time and high flowing speed of runoff in a ditch are solved, so that the pollutant removal rate and the recycling rate of the runoff in the ditch are improved.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural non-point source pollution control technology, and in particular to the field of a non-powered interception gate structure for automatic control of ditch runoff discharge. Background Technology

[0002] As an important component of farmland ecosystems, ditches have a certain capacity to reduce pollutants from farmland runoff. However, the pollutant reduction capacity of farmland ditches is generally weak, which is related to the fast flow speed and short residence time of runoff in ditches. Therefore, intercepting as much runoff as possible, slowing down the runoff velocity, and thus increasing the residence time of runoff are effective measures to improve the pollutant removal capacity of ditches.

[0003] In existing research and applications, setting up interception dams is a commonly used and effective measure to intercept ditch runoff. However, because interception dams cannot be automatically controlled to open and close, they severely affect the flood discharge capacity of ditches, preventing runoff from being quickly discharged during heavy rains and causing serious consequences such as farmland flooding. To overcome this shortcoming of interception dams, researchers have begun to develop automatically opening and closing ditch interception gates and have achieved some technological results. For example, Chinese patent (publication number: CN 115142387 A) discloses an ecological ditch with a liftable baffle, which reduces the runoff velocity in ecological ditches. However, this technology, as well as many other technologies that have been developed, mostly require electricity. In agricultural areas, there are not only difficulties in obtaining electricity, but also problems such as difficult equipment management, high investment and operating costs, and significant electrical safety hazards and awareness risks. Therefore, compared with electrically driven interception gates, developing non-powered interception gates that can automatically open and close according to the runoff size and installing them in agricultural ditches is of greater significance for intercepting ditch runoff, improving runoff residence time, and reducing pollutants. Summary of the Invention

[0004] This invention addresses the aforementioned problems and deficiencies by providing a non-powered interception gate for automatically controlling the discharge of runoff from ditches. The non-powered interception gate of this invention requires no power drive; it relies entirely on the interaction between gravity and water pressure to automatically control the opening and closing of the gate. This resolves the contradiction between intercepting and rapidly discharging runoff in farmland ditches. When runoff surges, the gate automatically opens to achieve rapid drainage, while when runoff decreases, it automatically closes to intercept the runoff, thereby improving the runoff's residence time, pollutant removal rate, and recharge utilization rate.

[0005] This utility model is achieved using the following technical solution.

[0006] A non-powered interception gate for automatically controlling the discharge of ditch runoff. The non-powered interception gate of this utility model includes a support frame, a rotating plate 2, a rotating shaft 3, a weight 4, a fixed pulley, a connecting rope 6, a U-shaped pad 7, and a gasket 8.

[0007] The support frame includes a first support frame 1.1 and a second support frame 1.2;

[0008] The fixed pulleys include a first fixed pulley 5.1 and a second fixed pulley 5.2;

[0009] The first fixed pulley 5.1 is fixedly installed in the middle of the first support frame 1.1; the second fixed pulley 5.2 is fixedly installed in the middle of the second support frame 1.2; the horizontal position of the first fixed pulley 5.1 is higher than the horizontal position of the second fixed pulley 5.2.

[0010] One end of the connecting rope 6 passes over the first fixed pulley 5.1 and is fixedly connected to the weight 4;

[0011] The other end of the connecting rope 6 passes over the second fixed pulley 5.2 and is fixedly connected to the upper part of the rotating plate 2;

[0012] The two ends of the rotating shaft 3 are fixedly installed at the bottom of the ditch and are perpendicular to the ditch;

[0013] The bottom of the rotating plate 2 is fixedly connected to the rotating shaft 3, and the rotating plate 2 moves in a fan-shaped motion through the rotating shaft 3.

[0014] Furthermore, in this invention, the height of the first fixed pulley 5.1 from the surface of the ditch is greater than the height of the rotating plate 2.

[0015] Furthermore, the second support frame 1.2 of this utility model is fixedly installed near the lower part of the ditch surface.

[0016] Furthermore, when the rotating plate 2 of this utility model is in a vertical state, the connecting rope 6 between the second fixed pulley 5.2 and the rotating plate 2 is in a horizontal or nearly horizontal state.

[0017] Furthermore, when the rotating plate 2 of this utility model is in a horizontal state, the connecting rope 6 between the second fixed pulley 5.2 and the rotating plate 2 forms a 45° angle with the horizontal.

[0018] Furthermore, the present invention provides a U-shaped pad 7 fixedly disposed in front of the rotating plate 2 and the rotating shaft 3. The outer side of the U-shaped pad 7 is fixed on the inner wall of the ditch and is perpendicular to the ditch. When the rotating plate 2 is in a vertical state, the rotating plate 2 and the U-shaped pad 7 are in contact.

[0019] Furthermore, the present invention provides a U-shaped gasket 8 on the side of the U-shaped pad 7 near the rotating plate 2.

[0020] Furthermore, the two ends of the rotating shaft 3 of this utility model are fixedly set at the bottom of the ditch, specifically: a base is provided on both sides of the bottom of the ditch, and the two ends of the rotating shaft 3 are fixedly and rotatably set in the base.

[0021] Furthermore, the rotating plate 2 of this utility model is made of PP board.

[0022] The beneficial effects of this utility model are as follows:

[0023] (1) The non-powered interception gate of the present invention does not require power drive and relies entirely on the cooperation between gravity and water pressure to automatically control the opening and closing of the interception gate;

[0024] (2) The non-powered interception gate of the present invention can automatically open to achieve rapid drainage when the runoff increases sharply, and automatically close to intercept the runoff when the runoff in the ditch decreases, so as to improve the residence time of the runoff, the pollutant removal rate and the recharge utilization rate.

[0025] (3) The powerless interception gate of the present invention has low manufacturing cost, requires no human operation, is easy to operate and manage, has no operating cost, and is easy to promote and apply.

[0026] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0027] Figure 1 Diagram (longitudinal section) showing the closed state of a non-powered intercepting gate during hourly runoff in a ditch.

[0028] Figure 2 Diagram (longitudinal section) showing the opening state of a non-powered intercepting gate when there is high runoff in a ditch;

[0029] Figure 3 Diagram showing the closed state of a non-powered intercepting gate during hourly runoff in a ditch (rear view);

[0030] Figure 4 Rear view of the unpowered interception gate opening status when the ditch runoff is large.

[0031] The numbers in the diagram are: 1.1-First support frame, 1.2-Second support frame, 2-Rotating plate, 3-Rotating shaft, 4-Weight, 5.1-First fixed pulley, 5.2-Second fixed pulley, 6-Connecting rope, 7-U-shaped pad, 8-Pad. Detailed Implementation

[0032] The following embodiments are only a part of the technical solution of this utility model, and are not intended to limit all the technical solutions of this utility model. The embodiments of this utility model are provided to further explain and illustrate the details of the technical solution of this utility model.

[0033] See Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown.

[0034] A non-powered interception gate for automatically controlling the discharge of ditch runoff, wherein two support frames (1) are fixedly connected to the ditch embankment, and each of them is connected to a fixed pulley 5 in the center. One end of the fixed pulley 5 is connected to a weight 4 of a certain mass through a connecting rope 6. The upper end of the rotating plate 2 is connected to the other end of the connecting rope 6, and the lower end is fixed to the bottom of the ditch through a rotating shaft 3. The outer side of the U-shaped pad 7 is fixed to the inner wall of the ditch, perpendicular to the ditch, and located in front of the rotating plate 2 and the rotating shaft 3. A pad 8 is fixed on the side of the U-shaped pad 7 close to the rotating plate 2 and the rotating shaft 3.

[0035] Preferably, when the rotating plate 2 is closed (e.g. Figure 1 The connecting rope 6 between the fixed pulley 5.2 and the rotating plate 2 should be kept horizontal to maximize the pulling arm of the weight 4, and the fixed pulley 5.2 should be as close as possible to the rotating plate 2 so that when the rotating plate 2 is opened (e.g., Figure 2 The angle between the connecting rope 6 and the rotating plate 2 should be as close to 45° as possible to obtain the maximum lever arm, thereby reducing the weight of the weight 4.

[0036] The weight 4 should be an inexpensive and readily available object, such as a bucket filled with water, and its weight should meet the requirement of 250 L / h. 2 <m 物 <250Lh1h, with the middle value being optimal.

[0037] The weight of the rotating plate 2 should meet the requirement that, while ensuring sufficient strength, the weight should be as small as possible. A high-strength and low-density board material, such as PP board, should be selected so that the rotating plate 2 can be more easily pulled up and closed after the runoff is reduced.

[0038] Let the height of the rotating plate be h, the depth of the ditch be h1, h < h1, and the width of the ditch be L, ρ 水 =1000kg / m 3 .

[0039] When there is no heavy rainfall and the runoff in the ditches is small, and rapid drainage is not required, in order to ensure that the ditches retain as much runoff as possible, increase the residence time of the runoff and the pollutant reduction rate, the interception gate should remain closed when the water level is greater than h (e.g., Figure 1 At this time, the weight of the object is m. 物 The following conditions must be met:

[0040]

[0041] That is, m 物 >250Lh 2 (2)

[0042] Meanwhile, when heavy rain occurs and the ditch runoff is large, in order to ensure that the ditch can drain water quickly and prevent the runoff from overflowing the ditch embankment, the intercepting gate must open quickly and automatically when the water level is less than h1. At this time, the weight m of the heavy object... 物The following conditions must be met:

[0043]

[0044] That is, m 物 <250Lh1h(4)

[0045] In summary, the weight m of the object 物 The scope is:

[0046] 250Lh 2 <m 物 <250Lh1h (5)

[0047] When the interception gate is open and the rapid drainage task is completed (e.g.) Figure 2 The gate needs to be pulled back to the closed state by the weight of a heavy object to ensure that as much runoff as possible is retained in the ditch after the flow decreases. Assume that at a water level of h2 (h2 < h1), the weight of the heavy object can pull the rotating plate back to the closed state. At this time, the weight m of the rotating plate... 板 The following conditions must be met:

[0048]

[0049] If the angle θ between the connecting rope and the rotating plate is 45°, then:

[0050] m 板 <1.414m 物 -1000Lhh2 (7)

[0051] Because the weight m of the rotating plate 板 It must be greater than 0, therefore:

[0052]

[0053] This invention proposes a non-powered interception gate for automatically controlling ditch runoff discharge. It can be installed in ditches of any size. The height and width of the rotating plate are determined according to the dimensions of the ditch, and the weight of the load and the rotating plate are calculated using the aforementioned formula. The implementation process is described in detail below through a specific example.

[0054] Assuming a 0.3m wide and 0.5m deep interception gate with a rotating plate height of 0.4m is installed in a ditch, the required weight range is 12-15kg according to formula (5). To achieve the most reliable effect, a more moderate value of 13.5kg is selected as the optimal weight. At this time, according to formula (8), it can be calculated that the rotating plate can only be pulled up and closed when the water level h2 is less than 0.16m and it is in a fully open state. The higher the water level at which the rotating plate closes, the more beneficial it is for intercepting runoff. Therefore, it is possible to choose when the water level h2 is 0.15m to pull up and close the rotating plate. At this time, according to formula (7), the weight m of the rotating plate is... 板 The weight should be less than 1.1 kg. Since the rotating plate needs to have high strength to ensure it doesn't deform when closed, a lightweight PP plastic plate is recommended. A heavier iron plate is also possible, but the increased weight will cause it to close only when the water level is lower. For example, if the rotating plate weighs m... 板 When the weight is 15kg, the water level height h2 can only be closed when it is below 0.034m. Therefore, in order to achieve the best runoff interception effect, the rotating plate should be as light as possible while ensuring that it does not deform when closed.

[0055] The key point and protection point of this invention is that, without the need for external power, the automatic opening and closing of the interception gate is controlled entirely by the synergistic effect of the weight of the heavy object, the weight of the rotating plate, and the water pressure. This ensures that when the ditch runoff increases sharply, the interception gate can automatically open to achieve rapid drainage, and when the ditch runoff decreases, it can automatically close to intercept more runoff. This solves the problems of short residence time and fast flow speed of runoff in the ditch, thereby improving the pollutant removal rate and recycling rate of ditch runoff.

[0056] The above descriptions are merely specific embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A passive interceptor gate for automatically controlling the discharge of gutter runoff, characterized in that The non-powered interception gate includes a support frame, a rotating plate (2), a rotating shaft (3), a weight (4), a fixed pulley, and a connecting rope (6); The support frame includes a first support frame (1.1) and a second support frame (1.2); The fixed pulleys include a first fixed pulley (5.1) and a second fixed pulley (5.2); The first fixed pulley (5.1) is fixedly installed in the middle of the first support frame (1.1); the second fixed pulley (5.2) is fixedly installed in the middle of the second support frame (1.2); the horizontal position of the first fixed pulley (5.1) is higher than the horizontal position of the second fixed pulley (5.2); One end of the connecting rope (6) passes over the first fixed pulley (5.1) and is fixedly connected to the weight (4); The other end of the connecting rope (6) passes over the second fixed pulley (5.2) and is fixedly connected to the upper part of the rotating plate (2); The two ends of the rotating shaft (3) are fixedly set at the bottom of the ditch and are perpendicular to the ditch; The bottom of the rotating plate (2) is fixedly connected to the rotating shaft (3), and the rotating plate (2) moves in a fan shape through the rotating shaft (3).

2. The unpowered intercepting dam according to claim 1, characterized in that, The height of the first fixed pulley (5.1) above the surface of the ditch is greater than the height of the rotating plate (2).

3. The unpowered intercepting dam according to claim 1, characterized in that, The second support frame (1.2) is fixedly installed near the lower part of the ditch surface.

4. The unpowered intercepting dam according to claim 1, wherein, When the rotating plate (2) is in a vertical state, the connecting rope (6) between the second fixed pulley (5.2) and the rotating plate (2) is in a horizontal or nearly horizontal state.

5. The unpowered intercepting dam according to claim 1, wherein, When the rotating plate (2) is in a horizontal state, the connecting rope (6) between the second fixed pulley (5.2) and the rotating plate (2) forms a 45° angle with the horizontal.

6. The unpowered intercepting dam according to claim 1, wherein, A U-shaped pad (7) is fixedly installed in front of the rotating plate (2) and the rotating shaft (3). The outer side of the U-shaped pad (7) is fixed on the inner wall of the ditch and is perpendicular to the ditch. When the rotating plate (2) is in a vertical state, the rotating plate (2) and the U-shaped pad (7) are in contact.

7. The unpowered intercepting dam according to claim 6, characterized in that, A U-shaped gasket (8) is provided on the side of the U-shaped pad (7) near the rotating plate (2).

8. The unpowered intercepting dam according to claim 1, wherein, The two ends of the rotating shaft (3) are fixedly set at the bottom of the ditch. Specifically, bases are set opposite each other on both sides of the bottom of the ditch, and the two ends of the rotating shaft (3) are fixedly and rotatably set in the bases.

9. The unpowered intercepting dam according to claim 1, wherein, The rotating plate (2) is made of PP board.

Images