Automatic control drainage device for farmland

Abstract

The invention discloses a farmland automatic control drainage device which comprises a three-way pipe, the three-way pipe is composed of a first pipe body and a second pipe body, a water inlet part of the first pipe body is rotationally connected with a flashboard, a balancing weight is arranged in the second pipe body, the balancing weight is connected with a rope, one end of the rope extends out of the second pipe body to be fixedly connected with the flashboard, and the other end of the rope extends out of the second pipe body to be fixedly connected with the flashboard. The flashboard is under the action of water pressure, the water pressure on the bottom of the flashboard is gradually increased along with the increase of the water depth of the farmland, and the water pressure on the top of the flashboard is relatively small, so that the flashboard is rotated under the action of the water pressure to open the water inlet part, and the flashboard is driven by the rope to lift the balancing weight to discharge the farmland water. The rope is pulled to enable the balancing weight to rise, at the moment, the farmland accumulated water enters the first pipe body and is automatically discharged into the field canal through the first pipe body, automatic drainage operation of the farmland accumulated water is achieved, and the device is of a mechanical structure, does not contain electric elements, control elements and the like and is suitable for being used in large-area farmland.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural water supply and drainage, and in particular to an automatic controlled drainage device for farmland. Background Art

[0002] With the improvement of agricultural production level, the transfer rate of farmland continues to increase. We vigorously implement the merger of small fields into large fields, farm management, and control of a large amount of farmland with a small amount of manpower. Automatic drainage management of farmland is particularly important.

[0003] Farmland drainage mainly includes surface runoff drainage and underground soil seepage drainage. When the rainfall is heavy (such as the plum rain season), the surface runoff is large, and a certain depth of surface water accumulates on the field surface. If it is not discharged in time, it will cause losses from waterlogging disasters on crops. In addition, when planting crops that consume more water, such as rice, a certain depth of water needs to be accumulated in the farmland, but too much water will also affect the initial growth of crops.

[0004] The traditional surface drainage mode of farmland by responsible entities is generally to artificially dig gaps on the ridges around the fields for drainage. This is not only time-consuming and labor-intensive, but also causes serious erosion and soil erosion at the gaps. When encountering heavy rainfall, for large areas of farmland managed by large households, it is impossible to dig gaps to drain water in a short period of time, resulting in accumulated water staying in the farmland for a long time, which has a negative impact on the growth of crops. Summary of the invention

[0005] The main purpose of the present invention is to provide an automatic controlled drainage device for farmland. The gate plate is acted upon by water pressure. As the water depth in the farmland increases, the water pressure at the bottom of the gate plate gradually increases, while the water pressure at the top of the gate plate is relatively small. Therefore, the gate plate is acted upon by the water pressure to rotate and open the water inlet, thereby pulling the rope to cause the counterweight to rise. At this time, the accumulated water in the farmland enters the first pipe body and is automatically discharged into the farm canal through the first pipe body, thereby realizing the automatic discharge operation of the accumulated water in the farmland.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A farmland automatic controlled drainage device comprises a tee pipe, which is composed of a first pipe body and a second pipe body. The water inlet portion of the first pipe body is rotatably connected to a gate plate, and a counterweight block is arranged in the second pipe body. A rope is connected to the counterweight block, and one end of the rope extends out of the second pipe body and is fixedly connected to the gate plate. The gate plate is used to rotate due to the pressure difference when the water in the farmland is deep, and drives the counterweight block to rise through the rope to discharge the farmland water.

[0007] Furthermore, a bayonet is provided at the top of the water inlet portion of the first tube body, and the gate is rotatably connected to the first tube body via a rotating shaft, and the rotating shaft is located in the bayonet.

[0008] Furthermore, the bottom of the gate plate is an arc-shaped surface, and the arc-shaped surface of the bottom of the gate plate is in contact with the inner bottom of the first tube body in a linear contact.

[0009] Furthermore, a first pulley is fixed on the second tube body, and the rope passes through the first pulley.

[0010] Furthermore, a second pulley is also provided in the second tube body, the rope passes through the second pulley and the second pulley is used to vertically connect the rope to the connecting surface of the counterweight block.

[0011] Furthermore, a mounting groove is provided at the top of one side of the second tube body, the first pulley is located in the mounting groove, and a cover plate is provided at the top of the second tube body.

[0012] Furthermore, the shape of the counterweight block matches the inner cavity of the first tube body to block the inner cavity of the first tube body.

[0013] Furthermore, the cross-sections of the counterweight block, the first tube body and the second tube body are all rectangular, and the top of the counterweight block is always located in the second tube body.

[0014] Furthermore, the second tube is perpendicular to the first tube Furthermore, the counterweight, the gate plate, the first tube body and the second tube body are all made of PVC material.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the water in the farmland is too deep, the gate is affected by the water pressure. As the water depth in the farmland increases, the water pressure on the bottom of the gate gradually increases, while the water pressure on the top of the gate is relatively small. Therefore, the gate is rotated under the water pressure to open the water inlet, thereby pulling the rope to make the counterweight rise. At this time, the water in the farmland enters the first pipe body and is automatically discharged into the agricultural canal through the first pipe body, thereby realizing the automatic discharge operation of the water in the farmland. This device adopts a mechanical structure and does not contain electrical, control and other components. It is suitable for use in large areas of farmland.

[0016] When the water accumulation in the farmland does not exceed the preset depth, the counterweight block falls into the first tube body under the action of gravity, thereby applying force to the gate through the rope, so that the gate closes the water inlet. At this time, the farmland water cannot enter the first tube body, nor can it be discharged into the agricultural canal through the first tube body, thereby ensuring that a certain depth of water is accumulated in the farmland to facilitate the planting of crops such as rice.

[0017] When the gate of the present invention rotates, the bayonet will limit the gate from rotating clockwise, so that it can only rotate counterclockwise, thereby opening the water inlet.

[0018] The bottom of the gate plate of the present invention is an arc surface, and the arc surface is in line contact with the bottom of the first tube body, so it can prevent the gate plate from being unable to rotate due to the obstruction of the bottom wall of the first tube body.

[0019] When the accumulated water in the farmland is gradually discharged and is slightly above the reasonable depth range, the gate will gradually close due to the drop in water pressure at its bottom. However, there is still water in the first tube body at this time. The water will exert buoyancy on the counterweight, thereby preventing the gate from closing directly. A certain channel for water circulation remains in the first tube body, and the accumulated water in the farmland can still enter the first tube body, thereby ensuring that the first tube body can continue to discharge the excess water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of an undrained farmland automatic control drainage device according to the present invention.

[0021] Figure 2 It is a schematic diagram of drainage of an automatic controlled drainage device for farmland according to the present invention.

[0022] Figure 3 The present invention is a schematic diagram of the connection between the water inlet part and the gate plate of an automatic controlled drainage device for farmland.

[0023] Figure 4 The present invention is a schematic diagram of the connection between the first pipe body and the rotating shaft of an automatic controlled drainage device for farmland.

[0024] Figure 5 The present invention is a schematic diagram of the connection structure of a gate plate and a rotating shaft of an automatic controlled drainage device for farmland.

[0025] Figure 6 The present invention is a schematic diagram of the connection structure of a first pipe body, a second pipe body and a counterweight block of an automatic controlled drainage device for farmland.

[0026] Figure 7 This is a schematic diagram of the connection between the second pipe body and the first pulley of an automatic controlled drainage device for farmland of the present invention.

[0027] Figure 8 The figure is a schematic cross-sectional view of a second pipe body of an automatic controlled drainage device for farmland according to the present invention.

[0028] In the figure: 1. tee pipe; 101. first pipe body; 1011. water inlet; 1012. bayonet; 102. second pipe body; 1021. mounting groove; 2. counterweight; 3. gate; 4. rope; 5. first pulley; 6. second pulley; 7. cover plate; 8. rotating shaft. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] like Figure 1-8As shown, an automatic controlled drainage device for farmland includes a three-way pipe 1, which is composed of a first pipe body 101 and a second pipe body 102. The water inlet part 1011 of the first pipe body 101 is rotatably connected to a gate plate 3. A counterweight block 2 is arranged in the second pipe body 102, and a rope 4 is connected to the counterweight block 2. One end of the rope 4 extends out of the second pipe body 102 and is fixedly connected to the gate plate 3. The gate plate 3 is used to rotate due to the pressure difference when the water depth of the farmland is deep, and drives the counterweight block 2 to rise through the rope 4 to discharge the farmland water.

[0031] In this embodiment, the first tube body 101 is arranged horizontally, the water inlet 1011 is located in the farmland, the water outlet is located in the farm canal and is higher than the water surface of the farm canal, and the second tube body 102 is perpendicular to the first tube body 101 and stands upright. When the water in the farmland is not too deep, Figure 1 As shown, the counterweight 2 falls into the first tube body 101 under the action of gravity, thereby applying force to the gate plate 3 through the rope 4, so that the gate plate 3 closes the water inlet 1011. At this time, farmland water cannot enter the first tube body 101, nor can it be discharged into the farm canal through the first tube body 101.

[0032] When the farmland is flooded too deeply, Figure 2 As shown, the gate plate 3 is acted upon by water pressure. As the water depth in the farmland increases, the water pressure at the bottom of the gate plate 3 gradually increases, while the water pressure at the top of the gate plate 3 is relatively small. That is, from the perspective of hydraulics, the hydrostatic pressure is distributed in a triangular shape from the bottom to the top, with the greatest force at the bottom and the least force at the top. Therefore, the gate plate 3 is acted upon by water pressure to rotate the shaft 8 to open the water inlet 1011, thereby pulling the rope 4 to cause the counterweight 2 to rise. At this time, the accumulated water in the farmland enters the first pipe body 101 and is automatically discharged into the farm canal through the first pipe body 101.

[0033] When the accumulated water in the farmland is drained, the water pressure at the bottom of the gate plate 3 becomes smaller. At this time, the rope 4 cannot lift the height of the counterweight block 2, so that the counterweight block 2 falls to the bottom of the first tube body 101 again, and then the rope 4 applies force to the gate plate 3, so that the gate plate 3 closes the water inlet 1011 to realize the farmland water storage operation.

[0034] When the accumulated water in the farmland is gradually discharged and is slightly higher than the reasonable depth range (that is, the water level in the farmland is flush with or slightly higher than the bottom of the water inlet 1011 of the first tube body 101), the gate 3 will gradually close due to the drop in water pressure at its bottom, but in this process, there is still water left in the first tube body 101. These waters will exert a certain buoyancy on the counterweight 2, thereby preventing the gate 3 from closing directly, so that there are still certain channels for water circulation in the first tube body 1 and the accumulated water in the farmland can still enter the first tube body 1, thereby ensuring that the first tube body 101 can continue to discharge the excess accumulated water. When the accumulated water in the farmland is discharged to a reasonable range, only a small amount of water is left in the first tube body 101, and the gravity of the counterweight 2 can overcome the buoyancy of the water on it and drop to the bottom of the first tube body 101, thereby closing the gate 3 and sealing the flow channel of the first tube body 1; this principle can ensure that when the water level in the farmland drops to a level slightly higher than the reasonable depth range, the device continues to perform drainage operations until the water level reaches a reasonable range.

[0035] Among them, Figure 3 As shown, a bayonet 1012 is provided on the top of the water inlet portion 1011 of the first tube body 101, and the gate plate 3 is rotatably connected to the first tube body 101 through the rotating shaft 8, and the rotating shaft 8 is located in the bayonet 1012. When the gate plate 3 is vertically arranged to close the water inlet portion 1011, the bayonet 1012 will be in close contact with the gate plate 3, and when the gate plate 3 rotates, the bayonet 1012 will limit the gate plate 3 from rotating clockwise, so that it can only rotate counterclockwise.

[0036] Among them, Figure 3 and Figure 5 As shown, the bottom of the gate plate 3 is an arc surface, and the arc surface at the bottom of the gate plate 3 is in contact with the bottom of the first tube body 101 and is in line contact, so the friction generated between the gate plate 3 and the first tube body 101 is small, so that the gate plate 3 can rotate easily. Moreover, since the gate plate 3 is in line contact with the bottom of the first tube body 101, during the rotation of the gate plate 3, the obstruction caused by the bottom of the first tube body 101 to the gate plate 3 can be easily overcome, ensuring that the gate plate 3 can rotate.

[0037] Among them, Figure 1 and Figure 8 As shown, a first pulley 5 is fixed on the second tube body 102, and the rope 4 passes through the first pulley 5, which can avoid the rope 4 from directly contacting the top opening of the second tube body 102, thereby reducing the resistance received by the rope 4 when being pulled. A second pulley 6 is also arranged in the second tube body 102, and the rope 4 passes through the second pulley 6, and the second pulley 6 is used to vertically connect the rope 4 to the connecting surface of the counterweight block 2. Therefore, the counterweight block 2 is subjected to the force of the rope 4 vertically upward, which facilitates the counterweight block 2 to be lifted upward.

[0038] Among them, Figure 6 and Figure 7As shown, a mounting groove 1021 is provided on the top of one side of the second tube body 102, the first pulley 5 is located in the mounting groove 1021, the rope 4 is in the mounting groove 1021 and extends out of the second tube body 102 through the mounting groove 1021, and a cover plate 7 is provided on the top of the second tube body 102, the cover plate 7 closes the top opening of the second tube body 102 to prevent foreign objects such as leaves and weeds from falling into the second tube body 102.

[0039] like Figure 6 As shown, the shape of the counterweight 2 matches the inner cavity of the first tube body 101. When the counterweight 2 is located in the first tube body 101, it can block the inner cavity of the first tube body 101 to prevent water from flowing in the first tube body 101. The cross-sections of the counterweight 2, the first tube body 101 and the second tube body 102 are all rectangular. The height of the counterweight 2 is higher than the height of the inner cavity of the first tube body 101, so the top of the counterweight 2 is always located in the second tube body 102. Therefore, the lifting path of the counterweight 2 is determined to prevent the counterweight 2 from being unable to enter the second tube body 102 after multiple lifting movements.

[0040] Among them, the counterweight block 2, the gate plate 3, the first tube body 101 and the second tube body 102 are all made of PVC material. The overall structure is light in weight, corrosion-resistant and has a long service life.

[0041] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic controlled drainage device for farmland, comprising a three-way pipe (1), characterized in that: The three-way pipe (1) is composed of a first pipe body (101) and a second pipe body (102); the water inlet portion (1011) of the first pipe body (101) is rotatably connected to a gate plate (3); a counterweight (2) is arranged in the second pipe body (102); a rope (4) is connected to the counterweight (2); one end of the rope (4) extends out of the second pipe body (102) and is fixedly connected to the gate plate (3); the gate plate (3) is used to rotate due to a pressure difference when the water depth of the farmland is deep, and drives the counterweight (2) to rise through the rope (4) to discharge the farmland water.

2. The automatic controlled drainage device for farmland according to claim 1, characterized in that: A bayonet (1012) is provided at the top of the water inlet portion (1011) of the first tube body (101), and the gate plate (3) is rotatably connected to the first tube body (101) via a rotating shaft (8), and the rotating shaft (8) is located in the bayonet (1012).

3. The automatic controlled drainage device for farmland according to claim 2, characterized in that: The bottom of the gate plate (3) is an arc-shaped surface, and the arc-shaped surface at the bottom of the gate plate (3) is in line contact with the inner bottom of the first tube body (101).

4. The automatic controlled drainage device for farmland according to any one of claims 1 to 3, characterized in that: A first pulley (5) is fixed on the second tube body (102), and the rope (4) passes through the first pulley (5).

5. The automatic controlled drainage device for farmland according to claim 4, characterized in that: A second pulley (6) is also provided in the second tube body (102), the rope (4) passes through the second pulley (6), and the second pulley (6) is used to vertically connect the rope (4) to the counterweight (2).

6. The automatic controlled drainage device for farmland according to claim 5, characterized in that: A mounting groove (1021) is provided at the top of one side of the second tube body (102), the first pulley (5) is located in the mounting groove (1021), and a cover plate (7) is provided at the top of the second tube body (102).

7. The automatic controlled drainage device for farmland according to claim 1, characterized in that: The shape of the counterweight block (2) matches the inner cavity of the first tube body (101) so as to block the inner cavity of the first tube body (101).

8. The automatic controlled drainage device for farmland according to claim 7, characterized in that: The cross-sections of the counterweight block (2), the first tube body (101) and the second tube body (102) are all rectangular, and the top of the counterweight block (2) is always located inside the second tube body (102).

9. The automatic controlled drainage device for farmland according to claim 8, characterized in that: The second tube body (102) is perpendicular to the first tube body (101).

10. The automatic controlled drainage device for farmland according to claim 1, characterized in that: The counterweight block (2), the gate plate (3), the first tube body (101) and the second tube body (102) are all made of PVC material.

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