Drip irrigation system for intensive cultivation of vegetables

Abstract

The invention relates to the technical field of agriculture, and discloses a drip irrigation system for intensive cultivation of vegetables, which comprises a water supply tank, a circulating water assembly, a water and fertilizer mixing assembly and a drip irrigation assembly, according to the invention, firstly, the equipment is driven through the water pressure change generated by the water hammer effect of rapid closing of the pipeline, the pumping of water and fertilizer is associated with the frequency of the water pressure change, and meanwhile, the dripping of liquid is associated with the pressure change through the arrangement of the silica gel drip valve; the water pressure change frequency and the change amplitude are set to adaptively adjust different water fertilizers required by different types of vegetables, the proportion of the water fertilizers and the drip irrigation speed, remote programmable control over equipment operation by a computer is achieved through the arrangement of a programmable servo motor in the whole process, and manual repeated adjustment is not needed; and the environment in the greenhouse can be analyzed and calculated through a sensor and a computer, and the equipment is automatically controlled, so that the labor cost is reduced, the automation degree of the equipment is improved, and modernized planting of vegetables is realized.

Description

Technical Field

[0001] The invention relates to the technical field of agriculture, in particular to a drip irrigation system for intensive cultivation of vegetables. Background Art

[0002] Greenhouse vegetables generally use a structural frame mainly made of bamboo and steel, and cover the structural frame with one or more layers of insulating plastic film to create a complete greenhouse space. Greenhouse vegetable cultivation has good thermal insulation performance. The plastic film can effectively prevent the loss of carbon dioxide produced during the growth of vegetables, so as to achieve the required insulation effect in the greenhouse.

[0003] At present, most agricultural drip irrigation uses manual methods for drip fertilization, which requires manual control of the drip irrigation time and the amount of fertilizer added each time. Excessive or insufficient fertilizer can affect the proportion of the mixed liquid. At the same time, it is necessary to manually add fertilizer multiple times and make the mixed liquid. Therefore, the manpower and material resources spent in the whole process of drip irrigation are relatively large. According to the temperature in the greenhouse, the watering demand cannot be automatically controlled according to the actual environmental conditions. Summary of the invention

[0004] The object of the present invention is to provide a drip irrigation system for intensive vegetable cultivation to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A drip irrigation system for intensive vegetable cultivation, comprising a water supply tank, a circulating water component, a water-fertilizer mixing component, and a drip irrigation component;

[0007] The circulating water component is installed on the water supply tank and is used to drive the water in the water supply tank to circulate;

[0008] The circulating water assembly includes a pressure pump, a connecting pipe, and a return pipe;

[0009] The water supply tank is provided with a water injection pipe, the water inlet end of the pressure pump is connected to the water supply tank, and the connecting pipes are provided with multiple groups, one end of the multiple connecting pipes is connected in parallel to the water outlet end of the pressure pump, and the other end of the pressure pump is connected in parallel to one end of the return pipe, and the other end of the return pipe is fixedly connected to the water supply tank, and a pressure stabilizing valve is installed in one end of each group of connecting pipes close to the pressure pump, and a butterfly valve is installed in one end of each group of connecting pipes close to the return pipe, and a programmable servo motor is installed on the control end of the butterfly valve and the pressure stabilizing valve, and the programmable servo motor is connected to a control computer, so that the programmable servo motor is programmed and controlled by the control computer, and then the output pressure of the pressure stabilizing valve is controlled by the programmable servo motor, and the opening and closing frequency of the butterfly valve is controlled;

[0010] The water-fertilizer mixing assembly is installed between the butterfly valve and the pressure-stabilizing valve, and is installed on the side of the connecting pipe close to the butterfly valve, and is used to mix water and liquid fertilizer;

[0011] The water-fertilizer mixing assembly comprises a mixing tank and a hydraulic extrusion part;

[0012] The bottom of the mixing tank is fixedly connected with a water inlet pipe, one end of the water inlet pipe is fixedly connected to the connecting pipe, the other end of the water inlet pipe extends to the middle of the mixing tank, a water outlet is arranged at the top of the water inlet pipe, an outer sleeve fixedly connected to the bottom of the mixing tank is arranged outside the water inlet pipe, the top of the outer sleeve extends to close to the top of the mixing tank, a plurality of groups of equally spaced Z-shaped stepped grooves are fixedly connected to the outer wall of the outer sleeve, and a liquid outlet pipe is connected in parallel to the outer wall of the mixing tank;

[0013] The hydraulic extrusion unit is installed on the top of the mixing tank, and the driving end of the hydraulic extrusion unit is installed in the water inlet pipe to pump the liquid fertilizer into the mixing tank;

[0014] The drip irrigation assembly is installed on the liquid outlet pipe and is used for drip irrigation of water and fertilizer. The opening and closing of the drip irrigation assembly is related to the change in the pressure of the liquid in the drip irrigation assembly. When the pressure of the liquid in the drip irrigation assembly increases, the drip irrigation assembly opens, and when the pressure of the liquid in the drip irrigation assembly is stable, the drip irrigation assembly remains closed.

[0015] As a further solution of the present invention: the hydraulic extrusion part includes a sealing cover installed on the top of the mixing tank, a liquid tank is fixedly connected in the sealing cover, a piston plate is slidably connected in the liquid tank, a connecting rod is fixedly connected on the piston plate, a driving sealing block is fixedly connected to the bottom of the connecting rod, the driving sealing block is slidably connected in the water inlet pipe, a spray tank is fixedly connected in the connecting rod, a nozzle is provided on the inner wall of the spray tank, a connecting pipe on the side of the spray tank close to the piston plate is provided with a connecting groove, the connecting groove connects the liquid tank and the spray tank, and a first one-way valve is provided in the liquid inlet connected to each other between the connecting groove and the liquid tank.

[0016] As a further solution of the present invention: the sealing cover is fixedly connected to a second mounting seat, the second mounting seat is internally threadedly connected to a second mounting head, the second mounting head is fixedly connected to a spring can, the bottom of the spring can is slidably connected to a spring driving plate, the top of the spring can is slidably connected to a pressure plate, a force spring is arranged between the spring driving plate and the pressure plate, the top of the connecting rod passes through the liquid tank and the second mounting head and extends into the spring can, and the spring driving plate is fixedly connected to the connecting rod.

[0017] As a further solution of the present invention: a screw is rotatably connected to the top of the spring can, a threaded drive cylinder is threadedly connected to the screw, the threaded drive cylinder is fixedly connected to the pressure plate, and the driving end of the screw is fixedly connected to a hexagonal screw head arranged outside the spring can.

[0018] As a further solution of the present invention: sliding connection grooves are provided in the screw rod and the connecting rod, a fixing rod is installed in the sliding connection groove, one end of the fixing rod extends into the spray tank and is fixedly connected to a sealing plug, the other end of the fixing rod passes through the top of the sliding connection groove and is fixedly connected to two groups of card slots, a rotating frame is fixedly connected to the top of the spring tank, a clamp is rotatably connected to the rotating frame, the clamp and the card slot cooperate with each other, a pin hole is provided between the clamp and the rotating frame, a pin is slidably connected in the pin hole, and a pull ring is fixedly connected to the clamp.

[0019] As a further solution of the present invention: the water-fertilizer mixing assembly also includes a fertilizer tank and a suction pipe;

[0020] The fertilizer tank is filled with liquid fertilizer, a mounting cover is installed on the top of the fertilizer tank, a suction tube is fixedly connected inside the mounting cover, a liquid inlet pipe is arranged inside the outer wall of the second mounting head, a second one-way valve is installed in the liquid inlet pipe, and a connecting hose is connected between the suction tube and the liquid inlet pipe.

[0021] As a further solution of the present invention: the drip irrigation assembly includes a drip irrigation pipe;

[0022] The drip irrigation pipes are provided with multiple groups, and the multiple groups of drip irrigation pipes are connected in parallel on the liquid outlet pipes. The drip irrigation pipes are provided with multiple groups of first mounting seats distributed equidistantly. The first mounting seats are internally threadedly connected with a first mounting head, a mounting groove is provided in the first mounting head, and a drip port is provided at the bottom of the first mounting head. A mounting frame is installed on one side of the mounting groove close to the drip irrigation pipe, and two groups of symmetrically arranged silicone drip valves are fixedly connected in the mounting frame.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention first drives the equipment through the water pressure change generated by the water hammer effect of the rapid closure of the pipeline, and correlates the pumping of water and fertilizer with the frequency of the water pressure change, and at the same time correlates the dripping of liquid with the pressure change through the setting of the silicone drip valve, so that the different ratios of water and fertilizer required for different types of vegetables and the drip irrigation speed are adaptively adjusted by setting the water pressure change frequency and change amplitude. The whole process realizes remote programmable control of the equipment operation by the computer through the setting of the programmable servo motor, without the need for repeated manual adjustment, and can analyze and calculate the environment in the greenhouse through sensors and computers, and automatically control the equipment, thereby reducing labor costs, improving the degree of automation of the equipment, and realizing modern vegetable cultivation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic diagram of the structure of a drip irrigation system for intensive vegetable cultivation.

[0025] Figure 2 The present invention is a schematic diagram of the structure of a circulating water component in a drip irrigation system for intensive vegetable cultivation.

[0026] Figure 3 The present invention is a schematic diagram of the structure of a water-fertilizer mixing component in a drip irrigation system for intensive vegetable cultivation.

[0027] Figure 4 The present invention is a cross-sectional view of a water-fertilizer mixing component in a drip irrigation system for intensive vegetable cultivation.

[0028] Figure 5 The present invention is a cross-sectional view of a drip irrigation component in a drip irrigation system for intensive vegetable cultivation.

[0029] Figure 6 The present invention is a schematic diagram of the structure of a mixing tank in a drip irrigation system for intensive vegetable cultivation.

[0030] Figure 7 The present invention is a cross-sectional view of a mixing tank in a drip irrigation system for intensive vegetable cultivation.

[0031] Figure 8 It is a schematic structural diagram of a hydraulic extrusion part in a drip irrigation system for intensive vegetable cultivation in the present invention.

[0032] Fig. 9 for Figure 8 A partial enlarged view of point A in the middle.

[0033] Fig.10 It is a first cross-sectional view of a hydraulic extrusion part in a drip irrigation system for intensive vegetable cultivation according to the present invention.

[0034] Fig.11 This is a second cross-sectional view of the hydraulic extrusion part of a drip irrigation system for intensive vegetable cultivation in the present invention.

[0035] In the figure: 1-water supply tank, 2-water injection pipe, 3-pressure pump, 4-connecting pipe, 5-return pipe, 6-pressure regulating valve, 7-butterfly valve, 8-programmable servo motor, 9-mixing tank, 10-fertilizer tank, 11-mounting cover, 12-drawing tube, 13-liquid outlet pipe, 14-drip irrigation pipe, 15-first mounting seat, 16-first mounting head, 17-mounting groove, 18-drip port, 19-mounting frame, 20-silicone drip valve, 21-water inlet pipe, 22-outer sleeve, 23-water outlet, 24-sealing cover, 25-second mounting seat, 26-second mounting head, 27-liquid tank, 28-piston plate, 29-connecting rod, 30-driving sealing block, 3 1-spray tank, 32-spout, 33-connecting groove, 34-liquid inlet, 35-first one-way valve, 36-liquid inlet pipe, 37-second one-way valve, 38-connecting hose, 39-spring tank, 40-spring drive plate, 41-pressing plate, 42-force spring, 43-screw, 44-threaded drive cylinder, 45-hexagonal screw head, 46-sliding connection groove, 47-fixing rod, 48-sealing plug, 49-slot, 50-rotating frame, 51-clamp, 52-pin hole, 53-pin, 54-pull ring, 55-circulating water assembly, 56-water-fertilizer mixing assembly, 57-drip irrigation assembly, 58-hydraulic extrusion part, 59-Z-shaped stepped groove. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention will be described in detail with reference to the drawings and in combination with the embodiments.

[0037] In one embodiment of the present invention, see Figures 1 to 11A drip irrigation system for intensive cultivation of vegetables, comprising a water supply tank 1, a circulating water component 55, a water-fertilizer mixing component 56, and a drip irrigation component 57; the circulating water component 55 is installed on the water supply tank 1; the circulating water component 55 comprises a pressure pump 3, a connecting pipe 4, and a return water pipe 5; the water supply tank 1 is provided with a water injection pipe 2, the water inlet end of the pressure pump 3 is connected to the water supply tank 1, the connecting pipe 4 is provided with a plurality of groups, one end of the plurality of connecting pipes 4 is connected in parallel to the water outlet end of the pressure pump 3, and the other end of the pressure pump 3 is connected in parallel to the return water The water-fertilizer mixing assembly 56 is installed between the butterfly valve 7 and the pressure-stabilizing valve 6, and the other end of the return pipe 5 is fixedly connected to the water supply tank 1. A pressure-stabilizing valve 6 is installed in one end of each group of connecting pipes 4 close to the pressure pump 3. A butterfly valve 7 is installed in one end of each group of connecting pipes 4 close to the return pipe 5. A programmable servo motor 8 is installed on the control end of the butterfly valve 7 and the pressure-stabilizing valve 6. The programmable servo motor 8 is connected to the control computer; the water-fertilizer mixing assembly 56 is installed between the butterfly valve 7 and the pressure-stabilizing valve 6, and is installed on the side of the connecting pipe 4 close to the butterfly valve 7; the water-fertilizer mixing assembly 56 includes Mixing tank 9, hydraulic extrusion part 58; the bottom of the mixing tank 9 is fixedly connected with a water inlet pipe 21, one end of the water inlet pipe 21 is fixedly connected to the connecting pipe 4, the other end of the water inlet pipe 21 extends to the middle of the mixing tank 9, and the top of the water inlet pipe 21 is provided with a water outlet 23. The outer side of the water inlet pipe 21 is provided with an outer sleeve 22 fixedly connected to the bottom of the mixing tank 9, the top of the outer sleeve 22 extends to close to the top of the mixing tank 9, and the outer wall of the outer sleeve 22 is fixedly connected with a plurality of groups of equidistantly distributed Z-shaped stepped grooves, and the outer wall of the mixing tank 9 is connected in parallel with The liquid outlet pipe 13; the hydraulic extrusion part 58 is installed on the top of the mixing tank 9, and the driving end of the hydraulic extrusion part 58 is installed in the water inlet pipe 21, which is used to pump the liquid fertilizer into the mixing tank 9; the drip irrigation assembly 57 is installed on the liquid outlet pipe 13, which is used to drip the water fertilizer, and the opening and closing of the drip irrigation assembly 57 is related to the change of the pressure of the liquid in the drip irrigation assembly 57. When the pressure of the liquid in the drip irrigation assembly 57 increases, the drip irrigation assembly 57 opens, and when the pressure of the liquid in the drip irrigation assembly 57 is stable, the drip irrigation assembly 57 remains closed;

[0038] The present invention first injects water into the water supply tank 1 through the water injection pipe 2, and at the same time, the water in the water supply tank 1 is pressurized and injected into the connecting pipe 4 through the pressure pump 3, and in this process, the pressure of the water entering the connecting pipe 4 is controlled by the setting of the pressure regulating valve 6, so that the pressure of the water in the multiple groups of connecting pipes 4 is kept uniform and consistent;

[0039] When the equipment is running, the circulating water component 55 can control the programmable servo motor 8 through the central control device to drive the butterfly valve 7 to open and close. When the butterfly valve 7 is opened, the water inlet pipe 21 remains closed under the action of the hydraulic extrusion part 58, and the water cannot flow into the mixing tank 9, and the water will flow back to the water supply tank 1 along the return pipe 5. When the butterfly valve 7 is closed, the water pressure in the connecting pipe 4 increases rapidly under the action of the water hammer effect, and the closer to the butterfly valve 7, the greater the water pressure. At this time, the hydraulic extrusion part 58 can be driven by the change of water pressure. At this time, the water outlet 23 in the water inlet pipe 21 is opened, and the water enters the outer casing 22 along the water outlet 23. At the same time, the hydraulic extrusion part 58 pumps the liquid fertilizer into the outer casing 22. Thus, the liquid fertilizer and the water body are preliminarily mixed, and then as the liquid level in the outer sleeve 22 gradually rises, the liquid flows out from the top of the outer sleeve 22 to the bottom of the mixing tank 9. In this process, the liquid reciprocates in a Z-shaped manner under the action of the Z-shaped stepped groove, so that the water body and the liquid fertilizer are completely mixed. The mixed water and fertilizer flow into the drip irrigation assembly 57 along the liquid outlet pipe 13, so that the water and fertilizer are drip-irrigated to the roots of the vegetables through the setting of the drip irrigation assembly 57, completing a set of drip irrigation processes. In this process, under the condition that the pressure of the water body in the connecting pipe 4 is constant, the amount of water and the amount of liquid fertilizer entering the mixing tank 9 in a set of drip irrigation processes are constant, thereby achieving stable control of the water-fertilizer ratio and the drip irrigation amount;

[0040] At the same time, when the present invention is operational, the opening and closing of the drip irrigation assembly 57 is related to the change in water and fertilizer pressure. When the butterfly valve 7 is closed, the pressure generated by the water hammer effect pushes the water into the mixing tank 9, and the gas pressure in the mixing tank 9 increases synchronously. The gas pressure acts on the water and fertilizer in the mixing tank 9, thereby increasing the pressure of the water and fertilizer in the liquid outlet pipe 13 and the drip irrigation assembly 57. At this time, the drip irrigation assembly 57 is opened. At this time, as the water and fertilizer in the drip irrigation assembly 57 are discharged, the pressure decreases synchronously. At this time, although the pressure change at different drip irrigation points has a time delay, once drip irrigation is started, the pressure change will be transmitted in a wave-like manner with the flow of water and fertilizer, thereby keeping the dripping frequency of the drip outlets 18 at different positions consistent, thereby achieving uniform drip irrigation of vegetables.

[0041] In addition, the present invention can program and control the programmable servo motor 8 through computer programming settings, and then control the output pressure of the pressure regulating valve 6 through the programmable servo motor 8, as well as the opening and closing time and opening and closing interval of the butterfly valve 7. When the pressure of the pressure regulating valve 6 changes, the pressure of the water body in the connecting pipe 4 changes, and then the flow rate of the water body flowing through the water outlet 23 is controlled. However, the spraying amount of liquid fertilizer is the same during this process, thereby realizing the adjustment of the fertilizer-water ratio. At the same time, the dripping frequency of the droplets in the drip irrigation assembly 57 can be controlled by controlling the opening and closing frequency of the butterfly valve 7, so as to adaptively adjust the water-fertilizer ratio and the drip irrigation speed according to the different water and fertilizer requirements of different types of vegetables.

[0042] In one case of this embodiment, see Figure 8 to Figure 11 The hydraulic extrusion part 58 includes a sealing cover 24 installed on the top of the mixing tank 9, a liquid tank 27 is fixedly connected in the sealing cover 24, a piston plate 28 is slidably connected in the liquid tank 27, a connecting rod 29 is fixedly connected to the piston plate 28, a driving sealing block 30 is fixedly connected to the bottom of the connecting rod 29, and the driving sealing block 30 is slidably connected in the water inlet pipe 21, a spray tank 31 is fixedly connected in the connecting rod 29, a nozzle 32 is arranged on the inner wall of the spray tank 31, a connecting groove 33 is arranged in the connecting pipe 4 on the side of the spray tank 31 close to the piston plate 28, the connecting groove 33 connects the liquid tank 27 and the spray tank 31, and a first one-way valve 35 is arranged in the liquid inlet 34 that is mutually connected between the connecting groove 33 and the liquid tank 27, and a first one-way valve 35 is fixedly connected to the sealing cover 24. A second mounting seat 25, the second mounting seat 25 is internally threadedly connected to a second mounting head 26, a spring tank 39 is fixedly connected to the second mounting head 26, a spring driving plate 40 is slidably connected to the bottom of the spring tank 39, a pressing plate 41 is slidably connected to the top of the spring tank 39, a force spring 42 is arranged between the spring driving plate 40 and the pressing plate 41, the top of the connecting rod 29 passes through the liquid tank 27 and extends into the spring tank 39 with the second mounting head 26, the spring driving plate 40 is fixedly connected to the connecting rod 29, a screw rod 43 is rotatably connected to the top of the spring tank 39, a threaded driving cylinder 44 is threadedly connected to the screw 43, the threaded driving cylinder 44 is fixedly connected to the pressing plate 41, and the driving end of the screw 43 is fixedly connected to a hexagonal screw head 45 arranged outside the spring tank 39;

[0043] The water-fertilizer mixing assembly 56 also includes a fertilizer tank 10 and a suction tube 12; the fertilizer tank 10 contains liquid fertilizer, a mounting cover 11 is mounted on the top of the fertilizer tank 10, the suction tube 12 is fixedly connected to the mounting cover 11, a liquid inlet pipe 36 is arranged on the outer wall of the second mounting head 26, a second one-way valve 37 is installed in the liquid inlet pipe 36, a connecting hose 38 is connected between the suction tube 12 and the liquid inlet pipe 36, the water-fertilizer mixing assembly 56 can suck the liquid fertilizer in the fertilizer tank 10 through the arrangement of the connecting hose 38 and the suction tube 12, and the liquid fertilizer is prevented from flowing back through the arrangement of the second one-way valve 37;

[0044] When the pressure of the water circulating water assembly 55 in the connecting pipe 4 fluctuates regularly under the water hammer effect, the water in the connecting pipe 4 flows into the water inlet pipe 21 under the action of the rapidly changing pressure, and in this process, the driving seal block 30 is pushed to move toward the top of the water inlet pipe 21 by the higher water pressure of the water in the water inlet pipe 21. When the driving seal block 30 moves to the top of the water inlet pipe 21, the water outlet 23 opens, and the water in the water inlet pipe 21 enters the outer sleeve 22 along the water outlet 23, and the driving seal block 30 During the lifting process, the driving seal block 30 drives the piston plate 28 to move in the liquid tank 27 through the connecting rod 29, thereby compressing the liquid fertilizer in the liquid tank 27. At this time, the first one-way valve 35 opens under the action of pressure, and the second one-way valve 37 closes. At this time, the liquid in the liquid tank 27 enters the connecting groove 33 along the first one-way valve 35, and then enters the spray tank 31 along the connecting groove 33, and finally sprays into the water body in the outer sleeve 22 along the nozzle 32, so that the water body and the liquid fertilizer are mixed;

[0045] During the lifting of the connecting rod 29, the connecting rod 29 drives the spring driving plate 40 to rise synchronously, and then compresses the force spring 42 through the spring driving plate 40. When the butterfly valve 7 is closed and the water hammer effect ends, the pressure in the connecting pipe 4 is reduced, and the force spring 42 pushes the connecting rod 29 downward through the spring driving plate 40. The connecting rod 29 drives the driving seal block 30 to move again in the direction close to the connecting pipe 4, so that the driving seal block 30 moves across the water outlet 23 to the bottom of the water inlet pipe 21 again, thereby sealing the water outlet 23. At this time, one water injection can be completed. At the same time, the connecting rod 29 drives the piston plate 28 to reset synchronously. At this time, the pressure of the liquid fertilizer in the liquid tank 27 is reduced. In this process, the first one-way valve 35 is closed, and the second one-way valve 37 is opened, and then the liquid fertilizer in the fertilizer tank 10 is sucked into the liquid tank 27 through the connecting hose 38 and the sucking tube 12, so that the liquid fertilizer in the liquid tank 27 is automatically replenished;

[0046] The hexagonal screw head 45 can also be screwed with a wrench to drive the screw rod 43 to rotate. The screw rod 43 drives the threaded driving cylinder 44 to rise and fall through the threaded connection with the threaded driving cylinder 44. The threaded driving cylinder 44 drives the pressure plate 41 to rise and fall, and then the relative distance between the pressure plate 41 and the spring driving plate 40 is adjusted, thereby adjusting the pre-pressure of the force spring 42, and finally adjusting the driving force required to lift the driving sealing block 30 to adapt to the changes in the pressure in the connecting pipe 4.

[0047] In one case of this embodiment, see Fig. 9 and Fig.11The screw rod 43 and the connecting rod 29 are provided with a sliding connection groove 46, a fixing rod 47 is installed in the sliding connection groove 46, one end of the fixing rod 47 extends to the spray tank 31 and is fixedly connected to a sealing plug 48, the other end of the fixing rod 47 passes through the top of the sliding connection groove 46 and is fixedly connected to two groups of card slots 49, the top of the spring tank 39 is fixedly connected to a rotating frame 50, the rotating frame 50 is rotatably connected to a clamp 51, the clamp 51 and the card slot 49 cooperate with each other, a pin hole 52 is provided between the clamp 51 and the rotating frame 50, a latch 53 is slidably connected in the pin hole 52, and a pull ring 54 is fixedly connected to the clamp 51;

[0048] When the present invention only needs watering but not fertilizing, the present invention can pull out the pin 53 from the pin hole 52, and drive the clamp 51 to be pulled out from the higher card slot 49 through the pull ring 54, and by pulling the card slot 49 upward, the card slot 49 drives the sealing plug 48 to rise through the fixing rod 47, thereby sealing the connection between the spray tank 31 and the connecting groove 33, and at the same time, the sealing plug 48 drives the connecting rod 29 to rise synchronously, so that the driving sealing block 30 moves to the top of the water inlet pipe 21, thereby eliminating the driving of the driving sealing block 30 by the water hammer effect. At this time, the liquid fertilizer cannot be injected into the mixing tank 9, so that only drip irrigation is performed on the water body, and then the clamp 51 is inserted into the lower card slot 49, and the pin 53 is inserted into the pin hole 52 again, thereby realizing the re-fixation of the fixing rod 47 and the connecting rod 29.

[0049] In one case of this embodiment, see Figure 1 and Figure 5 The drip irrigation assembly 57 includes a drip irrigation pipe 14; the drip irrigation pipe 14 is provided with multiple groups, and the multiple groups of drip irrigation pipes 14 are connected in parallel to the liquid outlet pipe 13. The drip irrigation pipe 14 is provided with multiple groups of first mounting seats 15 distributed at equal intervals, and the first mounting seat 15 is internally threadedly connected with a first mounting head 16, and a mounting groove 17 is provided in the first mounting head 16. A drip port 18 is provided at the bottom of the first mounting head 16, and a mounting frame 19 is installed on the side of the mounting groove 17 close to the drip irrigation pipe 14, and two groups of symmetrically arranged silicone drip valves 20 are fixedly connected in the mounting frame 19;

[0050] The drip irrigation assembly 57 installs the drip outlet 18 and the silicone drip valve 20 on the drip irrigation pipe 14 through the threaded connection of the first mounting head 16 and the first mounting seat 15. During operation, the pressure of the liquid in the drip irrigation pipe 14 will fluctuate regularly under the water hammer effect of the circulating water assembly 55. When the liquid pressure in the drip irrigation pipe 14 rises, the pressure on the silicone drip valve 20 increases, and the pressure pushes the silicone drip valve 20 to open. At this time, the liquid in the drip irrigation pipe 14 enters the first mounting head 16 and then falls along the drip outlet 18, that is, one pressure tap completes one dripping. At this time, although the pressure change at different drip outlets 18 has a time delay, once drip irrigation starts, the drip irrigation speed of different drip outlets 18 is positively correlated with the pressure change frequency in the drip irrigation pipe 14, thereby making the dripping frequency of the drip outlets 18 at different positions consistent, thereby achieving uniform drip irrigation of vegetables, thereby avoiding the situation where some vegetables are too dry or too wet, and at the same time, unified control of the drip irrigation amount at different positions can be achieved.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drip irrigation system for intensive vegetable cultivation, characterized in that: Including water supply tank, circulating water component, water-fertilizer mixing component, drip irrigation component; The circulating water component is installed on the water supply tank and is used to drive the water in the water supply tank to circulate; The circulating water assembly includes a pressure pump, a connecting pipe, and a return pipe; The water supply tank is provided with a water injection pipe, the water inlet end of the pressure pump is connected to the water supply tank, and the connecting pipes are provided with multiple groups, one end of the multiple connecting pipes is connected in parallel to the water outlet end of the pressure pump, and the other end of the pressure pump is connected in parallel to one end of the return pipe, and the other end of the return pipe is fixedly connected to the water supply tank, and a pressure stabilizing valve is installed in one end of each group of connecting pipes close to the pressure pump, and a butterfly valve is installed in one end of each group of connecting pipes close to the return pipe, and a programmable servo motor is installed on the control end of the butterfly valve and the pressure stabilizing valve, and the programmable servo motor is connected to a control computer, so that the programmable servo motor is programmed and controlled by the control computer, and then the output pressure of the pressure stabilizing valve is controlled by the programmable servo motor, and the opening and closing frequency of the butterfly valve is controlled; The water-fertilizer mixing assembly is installed between the butterfly valve and the pressure-stabilizing valve, and is installed on the side of the connecting pipe close to the butterfly valve, and is used to mix water and liquid fertilizer; The water-fertilizer mixing assembly comprises a mixing tank and a hydraulic extrusion part; The bottom of the mixing tank is fixedly connected with a water inlet pipe, one end of the water inlet pipe is fixedly connected to the connecting pipe, the other end of the water inlet pipe extends to the middle of the mixing tank, a water outlet is arranged at the top of the water inlet pipe, an outer sleeve fixedly connected to the bottom of the mixing tank is arranged outside the water inlet pipe, the top of the outer sleeve extends to close to the top of the mixing tank, a plurality of groups of equally spaced Z-shaped stepped grooves are fixedly connected to the outer wall of the outer sleeve, and a liquid outlet pipe is connected in parallel to the outer wall of the mixing tank; The hydraulic extrusion unit is installed on the top of the mixing tank, and the driving end of the hydraulic extrusion unit is installed in the water inlet pipe to pump the liquid fertilizer into the mixing tank; The drip irrigation assembly is installed on the liquid outlet pipe and is used for drip irrigation of water and fertilizer. The opening and closing of the drip irrigation assembly is related to the change in the pressure of the liquid in the drip irrigation assembly. When the pressure of the liquid in the drip irrigation assembly increases, the drip irrigation assembly opens, and when the pressure of the liquid in the drip irrigation assembly is stable, the drip irrigation assembly remains closed.

2. A drip irrigation system for intensive vegetable cultivation according to claim 1, characterized in that: The hydraulic extrusion part includes a sealing cover installed on the top of the mixing tank, a liquid tank is fixedly connected in the sealing cover, a piston plate is slidably connected in the liquid tank, a connecting rod is fixedly connected to the piston plate, a driving sealing block is fixedly connected to the bottom of the connecting rod, the driving sealing block is slidably connected in the water inlet pipe, a spray tank is fixedly connected in the connecting rod, a nozzle is arranged on the inner wall of the spray tank, a connecting pipe on the side of the spray tank close to the piston plate is provided with a connecting groove, the connecting groove connects the liquid tank and the spray tank, and a first one-way valve is arranged in the liquid inlet connected to each other between the connecting groove and the liquid tank.

3. A drip irrigation system for intensive vegetable cultivation according to claim 2, characterized in that: The sealing cover is fixedly connected with a second mounting seat, the second mounting seat is internally threadedly connected with a second mounting head, the second mounting head is fixedly connected with a spring can, the bottom of the spring can is slidably connected with a spring driving plate, the top of the spring can is slidably connected with a pressure plate, a force spring is arranged between the spring driving plate and the pressure plate, the top of the connecting rod passes through the liquid tank and the second mounting head and extends into the spring can, and the spring driving plate is fixedly connected to the connecting rod.

4. A drip irrigation system for intensive vegetable cultivation according to claim 3, characterized in that: The top of the spring can is rotatably connected with a screw rod, a threaded driving cylinder is threadedly connected to the screw rod, the threaded driving cylinder is fixedly connected to the pressure plate, and the driving end of the screw rod is fixedly connected with a hexagonal screw head arranged outside the spring can.

5. A drip irrigation system for intensive vegetable cultivation according to claim 4, characterized in that: A sliding connection groove is provided in the screw rod and the connecting rod, a fixing rod is installed in the sliding connection groove, one end of the fixing rod extends into the spray tank and is fixedly connected to a sealing plug, the other end of the fixing rod passes through the top of the sliding connection groove and is fixedly connected to two groups of slots, a rotating frame is fixedly connected to the top of the spring tank, a clamp is rotatably connected to the rotating frame, the clamp and the slot cooperate with each other, a pin hole is provided between the clamp and the rotating frame, a pin is slidably connected in the pin hole, and a pull ring is fixedly connected to the clamp.

6. A drip irrigation system for intensive vegetable cultivation according to claim 3, characterized in that: The water-fertilizer mixing assembly also includes a fertilizer tank and a suction pipe; The fertilizer tank is filled with liquid fertilizer, a mounting cover is installed on the top of the fertilizer tank, a suction tube is fixedly connected inside the mounting cover, a liquid inlet pipe is arranged inside the outer wall of the second mounting head, a second one-way valve is installed in the liquid inlet pipe, and a connecting hose is connected between the suction tube and the liquid inlet pipe.

7. A drip irrigation system for intensive vegetable cultivation according to claim 1, characterized in that: The drip irrigation assembly includes a drip irrigation pipe; The drip irrigation pipes are provided with multiple groups, and the multiple groups of drip irrigation pipes are connected in parallel on the liquid outlet pipes. The drip irrigation pipes are provided with multiple groups of first mounting seats distributed equidistantly. The first mounting seats are internally threadedly connected with a first mounting head, a mounting groove is provided in the first mounting head, and a drip port is provided at the bottom of the first mounting head. A mounting frame is installed on one side of the mounting groove close to the drip irrigation pipe, and two groups of symmetrically arranged silicone drip valves are fixedly connected in the mounting frame.

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