Greenhouse rainfall collection and utilization system

Abstract

The invention discloses a greenhouse rainfall collection and utilization system, which comprises a greenhouse, rainwater collection tanks, a water storage tank and a drip irrigation system, the rainwater collection tanks are installed on two sides of the greenhouse, the bottom of each rainwater collection tank is provided with a first water outlet, the first water outlets are connected to the water storage tank through a first water supply pipeline, and the water storage tank is connected with the drip irrigation system; the greenhouse comprises an air vent greenhouse film and aprons, the aprons are arranged along the two sides of the bottom of the greenhouse, the rain collecting grooves are formed in the tops of the aprons and are in seamless connection with the aprons, and the rain collecting grooves are as long as the greenhouse. When the air vent greenhouse film is put down, the air vent greenhouse film, the rain collecting groove and the apron form a closed surface; the rain collecting groove comprises a bottom plate and a fence, the side, close to the greenhouse, of the fence is perpendicular to the bottom plate, and the side, away from the greenhouse, of the fence and the bottom plate form an obtuse angle. The system can collect and store rainwater, performs drip irrigation according to the water demand of crops in a specific period, is convenient to install and high in rainwater collecting capacity, does not affect the heat preservation property of the greenhouse, saves water and enables the crops to grow healthily.

Description

Technical Field

[0001] This invention relates to the field of precipitation collection and utilization technology, specifically to a greenhouse precipitation collection and utilization system. Background Technology

[0002] The Bashang region in northwestern Hebei Province has a cool climate, abundant sunshine, and large diurnal temperature range, giving it a unique advantage in producing high-quality, cool-climate vegetables. After nearly 20 years of development, the current area under open-field vegetable cultivation is approximately 700,000 mu (about 46,667 hectares), and greenhouse vegetable cultivation exceeds 20,000 mu (about 1,333 hectares). Before the implementation of the program to reduce irrigated land in the Bashang area, the blind expansion of irrigated crop cultivation areas, driven by economic interests and coupled with a lack of water conservation awareness, resulted in over-extraction of groundwater despite the adoption of drip irrigation under mulch.

[0003] Rainwater is a precious resource bestowed upon humankind by nature. The rational utilization of this resource through rainwater harvesting technology and equipment is of great significance, enabling efficient and effective water use, which is beneficial for crop growth and achieving high and stable yields. Due to the cool climate of northwestern Hebei, many vegetable crops need to be grown in greenhouses. These greenhouses are arched, and rainwater falling onto them slides down the sides of the arch. During periods of heavy rainfall, rainwater flows through the vents into the soil between the greenhouse walls, not only wasting water resources but also leading to weed growth and increased humidity due to seepage, thus exacerbating pests and diseases. Summary of the Invention

[0004] The purpose of this invention is to provide a greenhouse rainwater collection and utilization system. This system can collect and store rainwater and perform drip irrigation according to the water requirements of crops at specific times. It is also easy to install, has a strong rainwater collection capacity, does not affect the airtightness of the greenhouse, saves water, and promotes healthy crop growth.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A greenhouse rainwater collection and utilization system includes a greenhouse, a first water supply pipeline, and a first return water pipeline. It also includes a rainwater collection trough, a water storage tank, and a drip irrigation system. The rainwater collection trough is installed on both sides of the greenhouse, and a first outlet is provided at the bottom of the trough. The first outlet is connected to the water storage tank through the first water supply pipeline. Rainwater collected in the rainwater collection trough flows into the water storage tank through the first water supply pipeline and then flows to the drip irrigation system through the first return water pipeline. The greenhouse includes a vent film and a skirt. The skirt is set on both sides of the bottom of the greenhouse. The rain collection trough is set on the top of the skirt and is seamlessly connected to the skirt. The length of the rain collection trough is equal to that of the greenhouse, and the position of the vent film is not higher than the top of the rain collection trough. The vent film can be rolled up or down. When the vent film is lowered into the rain collection trough, the vent film, the rain collection trough and the skirt form a closed surface. The rain collection trough includes a bottom plate and a fence. The side of the fence near the greenhouse is perpendicular to the bottom plate, and the side of the fence away from the greenhouse is at an obtuse angle to the bottom plate.

[0007] Preferably, the greenhouse further includes a greenhouse frame, insect-proof netting, an upper film netting slot, and a lower film netting slot. The upper film netting slot is fixed to the greenhouse frame, and the lower film netting slot is located in the rainwater collection trough. The lower film netting slot and the rainwater collection trough are simultaneously fixed to the greenhouse frame by self-drilling screws. One end of the insect-proof netting is fixed in the upper film netting slot by a first retaining spring, and the other end of the insect-proof netting is fixed in the lower film netting slot by a second retaining spring.

[0008] Preferably, the bottom plate is inclined along the length of the water tank at an angle of 1-3 degrees, and the bottom plate is concave downward; the first water outlet is located at the lowest point of the inclined bottom plate.

[0009] Preferably, it also includes a sedimentation tank, through which water collected in the rainwater collection trough is sent to the sedimentation tank via the first water supply pipeline, and through the second water supply pipeline, water in the sedimentation tank is sent to a water storage tank.

[0010] Preferably, the water storage tank is equipped with a submersible pump, which is connected to the first return water pipeline.

[0011] Preferably, it also includes a second water outlet, which is located in the middle of the rainwater collection trough along the length of the rainwater collection trough, and the second water outlet is connected to the first water supply pipeline.

[0012] Preferably, the drip irrigation system includes a fertilizer applicator, a main pipe, drip irrigation tape, drippers, and valves. The fertilizer applicator is connected to a first return water pipe, and the other end of the fertilizer applicator is connected to the main pipe. The main pipe is connected to the drip irrigation tape. Drippers are provided on the drip irrigation tape, and valves are provided on each drip irrigation tape. The water flow of each drip irrigation tape is controlled by controlling the opening and closing of the valves.

[0013] Preferably, a filter screen is provided in the rainwater collection trough; a pressing line is provided on the outside of the greenhouse, and the pressing line is located on the outside of the rainwater collection trough.

[0014] Preferably, the surface of the rainwater collection trough is galvanized, and the water storage tank is a fiberglass water storage tank.

[0015] Preferably, the sedimentation tank is exposed on the ground surface, and the water storage tank is located below the frost layer.

[0016] In the above technical solution, rainwater is collected and utilized by setting rainwater collection troughs on both sides of the greenhouse. The rainwater collection troughs are connected to a sedimentation tank through a first water supply pipeline, and the sedimentation tank is connected to a water storage tank through a second water supply pipeline. The water storage tank is connected to a drip irrigation system through a first return water pipeline. The rainwater collection troughs are the same length as the greenhouse and are installed on the greenhouse frame. The lower mesh film slot is installed in the rainwater collection troughs and will not affect the rolling up or lowering of the vent film. When the temperature is low or the rainfall is heavy, the vent film is lowered into the rainwater collection troughs. At this time, the vent film, the rainwater collection troughs and the skirt form a closed curved surface, that is, the greenhouse is in a closed state, avoiding damage to the crops in the greenhouse due to excessively low temperature or excessive rainfall. Rainwater flows into the rainwater collection trough along the vents of the greenhouse film. The trough collects rainwater falling on the greenhouse. Its bottom plate is inclined and concave, causing rainwater to collect at the lowest point of the plate due to gravity. A first outlet is located at this lowest point, allowing the collected rainwater to flow into a storage tank. Furthermore, when rainfall is heavy, it's difficult to collect all the rainwater through the first outlet into the first water supply pipe. Also, heavy rain may cause soil, stones, and other debris to fall. Therefore, a second outlet is installed to further enhance rainwater collection and prevent the first outlet from being blocked, thus ensuring the rainwater flows into the first water supply pipe. Finally, the rainwater collection trough is equipped with a filter screen to prevent weeds, branches, and other debris from falling into the trough and clogging the first and second outlets.

[0017] The rainwater collection trough consists of a base plate and a fence. During installation, since the side of the fence closest to the greenhouse is perpendicular to the base plate, when the user installs the lower mesh card slot and the rainwater collection trough simultaneously with self-drilling screws, the perpendicularity of the fence side closest to the greenhouse allows for better fixation of the rainwater collection trough and the lower mesh card slot together. Furthermore, the user needs to place their hand in the rainwater collection trough during installation, but due to the narrow width of the trough, it is not easy to operate. By setting the side of the fence furthest from the greenhouse at an obtuse angle to the base plate, the space of the rainwater collection trough is increased, and the user can operate more easily.

[0018] By connecting a sedimentation tank between the storage tank and the rainwater collection trough, the system addresses the challenge of cleaning the underground storage tank. The collected rainwater is filtered and settled before flowing into the storage tank, reducing cleaning frequency and enhancing the system's practicality. Simultaneously, water from the storage tank is pumped into the greenhouse to irrigate crops, preventing debris from entering the pump and further avoiding clogging of the drip irrigation tape. Placing the pressing line on the outside of the rainwater collection trough, pressing it against the greenhouse, further increases its stability. Galvanizing the surface of the rainwater collection trough prevents rusting after being soaked in rainwater. Using a fiberglass storage tank prevents leakage and facilitates installation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the rainwater collection trough structure of the present invention;

[0021] Figure 3 This is a schematic diagram showing the connection between the upper membrane mesh slot and the first retaining spring of the present invention;

[0022] Figure 4 This is a schematic diagram showing the connection between the lower membrane mesh slot and the second retaining spring of the present invention.

[0023] In the diagram: 1. Greenhouse; 11. Ventilation opening; 12. Upper film mesh slot; 13. First spring clip; 14. Insect-proof netting; 15. Lower film mesh slot; 16. Second spring clip; 17. Apron; 18. Greenhouse frame; 2. Rainwater collection trough; 21. First water outlet; 22. Second water outlet; 23. Base plate; 24. Enclosure; 3. First water supply pipeline; 4. Sedimentation tank; 5. Second water supply pipeline; 6. Water storage tank; 61. Submersible pump; 7. First return water pipeline; 8. Irrigation system; 81. Main pipe; 82. Drip irrigation tape; 83. Drip emitter; 9. Film pressing line. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figures 1 to 4 As shown, this greenhouse rainwater collection and utilization system includes a greenhouse 1. Rainwater collection troughs 2 are installed on both sides of the greenhouse 1. A first outlet 21 is located at the bottom of each rainwater collection trough 2, connected to a first water supply pipe 3. The other end of the first water supply pipe 3 is connected to a sedimentation tank 4. Since the water storage tank 6 is located underground and difficult to clean, the collected rainwater is filtered through sedimentation. The filtered rainwater flows into the water storage tank 6, reducing the frequency of cleaning and enhancing the practicality of the system. The sedimentation tank 4 is connected to the water storage tank 6 via a second water supply pipe 5. A submersible pump 61 is installed in the water storage tank 6, connected to a drip irrigation system 8 via a first return water pipe 7. By installing rainwater collection troughs 2 on both sides of the existing greenhouse 1, rainwater is collected and stored in the underground water storage tank 6. When irrigation is needed, the water in the water storage tank 6 is discharged into the drip irrigation system 8, saving water resources. Furthermore, the rainwater collection troughs 2 are low-cost, easy to manufacture and install, and convenient for users.

[0026] Greenhouse 1 includes a greenhouse frame 18, a ventilation opening film 11, an upper film mesh slot 12, a first retaining spring 13, an insect-proof netting 14, a lower film mesh slot 15, a second retaining spring 16, and an apron 17. The apron 17 is installed along both sides of the bottom of greenhouse 1. The upper film mesh slot 12 is fixedly installed on the greenhouse frame 18 on both sides of greenhouse 1. The lower film mesh slot 15 is fixedly installed in the rainwater collection trough 2. The lower film mesh slot 15 and the rainwater collection trough 2 are simultaneously fixed to the greenhouse frame 18 on both sides of greenhouse 1 using self-drilling screws. One side of the insect-proof netting 14 is fixed to the upper film mesh slot 12 by the first retaining spring 13, and the other side is fixed to the lower film mesh slot 15 by the second retaining spring 16. The ventilation opening film 11 can be rolled up and down. When the ventilation opening film 11 is rolled down, the insect-proof netting 14 can be completely rolled up. Covering; the rain collection trough 2 is set on top of the apron 17 and seamlessly connected to the apron 17. The rain collection trough 2 is the same length as the greenhouse 1 and is fixed to the greenhouse frame by a self-drilling screw. The lower mesh card slot is located in the rain collection trough, which facilitates the replacement of insect-proof netting. This installation method does not affect the rolling up or lowering of the vent film 11. When the temperature is low or the rainfall is heavy, the vent film 11 is lowered into the rain collection trough 2. At this time, the vent film 11, the rain collection trough 2 and the apron 17 form a closed curved surface, that is, the greenhouse 1 is in a closed state, which avoids damage to the crops in the greenhouse due to low temperature or heavy rain. At the same time, the film pressing line 9 is set on the outside of the rain collection trough 2, pressing the rain collection trough 2 onto the lower mesh card slot 15, further increasing the stability of the rain collection trough 2.

[0027] The drip irrigation system 8 includes a fertilizer applicator (not shown in the figure), a main pipe 81, drip irrigation tape 82, drippers 83, and valves (not shown in the figure). The fertilizer applicator is connected to the first return water pipe 7, and the other end of the fertilizer applicator is connected to the main pipe 81. The main pipe 81 is connected to the drip irrigation tape 82, and each drip irrigation tape 82 is equipped with a dripper 83. Each drip irrigation tape 82 is also equipped with a valve. By controlling the opening and closing of the valves, the water flow of each drip irrigation tape 82 can be controlled, thereby precisely controlling the amount of water given to the crops. The sedimentation tank 4 also prevents contaminants from entering the drippers 83 and clogging them.

[0028] In this embodiment, the surface of the rainwater collection trough 2 is galvanized to prevent it from rusting after being soaked by rainwater during use. The water storage tank 6 is located below the frozen soil layer, while the sedimentation tank 4 is located on the ground surface. The water storage tank 6 is made of fiberglass to prevent leakage and facilitate installation. The rainwater collection trough 2 includes a base plate 23 and a surrounding fence 24. The surrounding fence 24 is arranged around the base plate 23. During installation, since the side of the surrounding fence 24 closest to the greenhouse 1 is perpendicular to the base plate 23, the user uses self-drilling screws to simultaneously fix the rainwater collection trough 2 and the lower film mesh slot 15 located in the rainwater collection trough 2. The self-drilling screws are perpendicular to the side of the surrounding fence 24 closest to the greenhouse 1, which can effectively fix the rainwater collection trough 2 and the lower film mesh slot 15 together. Furthermore, the user needs to place their hand in the rainwater collection trough 2 during installation, but due to the rainwater collection trough 2's... The narrow width makes it difficult to operate. By setting the side of the enclosure 24 away from the greenhouse 1 at an obtuse angle to the bottom plate 23, the space of the rainwater collection trough 2 is increased, and it is also easier for users to operate. Furthermore, the bottom plate 23 is inclined along the length of the rainwater collection trough 2 at an angle of 1-3 degrees, and the bottom plate 23 is concave downwards. Rainwater is collected at the lowest point of the bottom plate 23 by gravity. At this point, the first outlet 21 is set, and the collected rainwater flows into the water storage tank 6 through the first outlet 21 to collect the rainwater.

[0029] In a preferred embodiment, a second outlet 22 is also included. The second outlet 22 is located in the middle of the rainwater collection trough 2 along the length direction of the rainwater collection trough 2, and the second outlet 22 is connected to the first water supply pipe 3. When the rain is heavy, it is difficult to collect all the rainwater into the first water supply pipe 3 through the first outlet 21 alone. In addition, when the rain is heavy, some mud, stones and other heavy objects will inevitably fall. At this time, the second outlet 22 can not only further enhance the rainwater collection effect, but also prevent the rainwater from not flowing into the first water supply pipe 3 after the first outlet 21 is blocked.

[0030] In a preferred embodiment, a filter screen (not shown in the figure) is provided in the rainwater collection trough 2 to prevent weeds, branches and leaves and other debris from falling into the rainwater collection trough 2 and clogging the first outlet 21 and the second outlet 22.

[0031] This embodiment is merely an illustration of the concept and implementation of the present invention and is not intended to limit it. Under the concept of the present invention, technical solutions without substantial changes are still within the scope of protection.

Claims

1. A greenhouse rainwater collection and utilization system, comprising a greenhouse, a first water supply pipeline, and a first return pipeline, characterized in that, It also includes a rainwater collection trough, a water storage tank, and a drip irrigation system. The rainwater collection trough is installed on both sides of the greenhouse, and a first water outlet is provided at the bottom of the rainwater collection trough. The first water outlet is connected to the water storage tank through a first water supply pipe. The rainwater collected by the rainwater collection trough flows into the water storage tank through the first water supply pipe and flows to the drip irrigation system through the first return water pipe. The greenhouse includes a vent film and an apron. The apron is set along both sides of the bottom of the greenhouse. The rainwater collection trough is set on the top of the apron and is seamlessly connected to the apron. The length of the rainwater collection trough is equal to that of the greenhouse, and the position of the vent film is not higher than the top of the rainwater collection trough. The vent film can be rolled up or lowered. When the vent film is lowered into the rainwater collection trough, the vent film, the rainwater collection trough, and the apron form a closed surface. The rainwater collection trough includes a base plate and a fence. The side of the fence near the greenhouse is perpendicular to the base plate, and the side of the fence away from the greenhouse forms an obtuse angle with the base plate.

2. The greenhouse rainwater collection and utilization system as described in claim 1, characterized in that, The greenhouse also includes a greenhouse frame, insect-proof netting, an upper film netting slot, and a lower film netting slot. The upper film netting slot is fixed to the greenhouse frame, and the lower film netting slot is located in the rainwater collection trough. The lower film netting slot and the rainwater collection trough are simultaneously fixed to the greenhouse frame by self-drilling screws. One end of the insect-proof netting is fixed to the upper film netting slot by a first retaining spring, and the other end of the insect-proof netting is fixed to the lower film netting slot by a second retaining spring.

3. The greenhouse rainwater collection and utilization system as described in claim 2, characterized in that, The bottom plate is inclined along the length of the water tank at an angle of 1-3 degrees, and the bottom plate is concave downward; the first water outlet is located at the lowest point of the inclined bottom plate.

4. The greenhouse rainwater collection and utilization system as described in claim 1, characterized in that, It also includes a sedimentation tank, through which water collected in the rainwater collection trough is sent to the sedimentation tank via the first water supply pipeline, and through the second water supply pipeline, water in the sedimentation tank is sent to a water storage tank.

5. The greenhouse rainwater collection and utilization system as described in any one of claims 1 to 4, characterized in that, The water storage tank is equipped with a submersible pump, which is connected to the first return water pipeline.

6. The greenhouse rainwater collection and utilization system as described in claim 5, characterized in that, It also includes a second outlet, which is located in the middle of the rainwater collection trough along its length and is connected to the first water supply pipeline.

7. The greenhouse rainwater collection and utilization system as described in claim 6, characterized in that, The drip irrigation system includes a fertilizer applicator, a main pipe, drip irrigation tape, drippers, and valves. The fertilizer applicator is connected to a first return water pipe, and the other end of the fertilizer applicator is connected to the main pipe. The main pipe is connected to the drip irrigation tape. Drippers are provided on the drip irrigation tape, and valves are provided on each drip irrigation tape. The water flow of each drip irrigation tape is controlled by controlling the opening and closing of the valves.

8. The greenhouse rainwater collection and utilization system as described in claim 7, characterized in that, A filter screen is installed in the rainwater collection trough; a film pressing line is installed on the outside of the greenhouse, and the film pressing line is located outside the rainwater collection trough.

9. The greenhouse rainwater collection and utilization system as described in claim 8, characterized in that, The rainwater collection trough is galvanized, and the water storage tank is a fiberglass water storage tank.

10. The greenhouse rainwater collection and utilization system as described in claim 4, characterized in that, The sedimentation tank is exposed on the ground surface, while the water storage tank is located below the frost layer.

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