CN204443453U - A kind of high stability Negative pressure irrigation device - Google Patents

Abstract

The utility model relates to a high-stability negative pressure irrigation device, which comprises a closed water storage tank. An air supply pipe is arranged inside the water storage tank. The air supply pipe extends into the bottom of the water storage tank. The air supply port and the bottom of the water storage tank are connected to the negative pressure controller through the first water outlet pipe. The negative pressure controller includes several thick pressure control tubes, and each thick pressure control tube is equipped with a thin water supply tube inside. The water inlet passes through the bottom of the thick pressure control pipe and is connected with the water storage tank. The thick pressure control pipes are connected in parallel through the thin water supply pipe. The top of the pipe is provided with a water inlet, and the bottom of the thick pressure control pipe is connected with the multi-pipe connector through the second water outlet pipe, and the multi-pipe connector is connected with the infiltrator through the connecting pipe, and the infiltrator is buried in the soil. The height of the negative pressure irrigation device of the utility model is not more than one meter, the structure is simple, convenient and adjustable, and the amplitude of the negative pressure is extremely small.

Description

A high stability negative pressure irrigation device

technical field

The utility model relates to a high-stability negative pressure irrigation device, which belongs to the field of agricultural irrigation.

Background technique

Negative pressure underground irrigation technology is a new type of water-saving active irrigation technology proposed for greenhouse potted crops. This technology buries the emitter deeply at the bottom of the basin, and uses the physiological characteristics of crop water and soil capillary suction to automatically infiltrate the water in the emitter into the soil, thereby forming a negative pressure in the water delivery pipe. Under the action of atmospheric pressure, water is pressed from the water supply into the water pipe to replenish the water flowing into the soil from the irrigator, thus ensuring the uninterrupted operation of the entire system, realizing the continuous and automatic acquisition of water by the crops, and turning passive irrigation into active irrigation. In the negative pressure irrigation system, the water supply suction of the negative pressure underground irrigation system is determined by the level difference between the water supplier and the emitter.

Compared with many other irrigation technologies, negative pressure irrigation is undoubtedly the best one at present. It can provide an air-conditioned and more suitable soil humidity environment for dryland crops to grow in the soil all the time, so as to obtain high quantity and high-quality agricultural products. In fact, such an environment is not uncommon in nature. When the groundwater level is appropriate, it can provide crops with a suitable soil moisture environment. However, with the increase of evapotranspiration and the change of groundwater level, the water supply of groundwater to the soil decreases or exceeds. As a result, the soil becomes dry and waterlogged, which is no longer suitable for crop growth. That being the case, it is enough to adjust the groundwater level of the soil to a suitable depth, but it is often difficult to achieve in practice, especially in the small-scale metered irrigation experiment of potted plants, it is necessary to place the water storage device in a place where the operator can manage and observe conveniently. The position of the aspirator under test was buried at different depths below the water storage device, and the positive pressure head on the surface was converted into a negative pressure head. Although existing negative pressure irrigation devices have devices that can realize this function, they are either complex and have large negative pressure fluctuations, or require the use of electronic control devices, which not only consume energy, but also pose potential safety hazards.

Utility model content

The utility model provides a high-stability negative pressure irrigation device and a negative pressure irrigation method thereof, and solves the problems of the existing negative pressure irrigation device such as complexity, long distance between the water storage device and the permeator, and inconvenient operation.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A high-stability negative pressure irrigation device, comprising a closed water storage tank, an air supply pipe is arranged inside the water storage tank, the air supply pipe extends into the bottom of the water storage tank, and the top of the water storage tank is arranged There is a port for adding water and air, and the bottom of the water storage tank is connected to the negative pressure controller through the first water outlet pipe. The negative pressure controller includes several thick pressure control pipes, and each thick pressure control pipe is equipped with a water supply fine pipe inside. The water inlet of the thin water supply pipe passes through the bottom of the thick pressure control pipe and communicates with the water storage tank. The thick pressure control pipes are connected in parallel through the thin water supply pipe, and the outlet of the thin water supply pipe extends into the The upper part of the thick pressure pipe, the top of the pressure control thick pipe is provided with a water inlet, the bottom of the pressure control thick pipe is connected with the multi-pipe connector through the second outlet pipe, and the multi-pipe connector is connected to the multi-pipe connector through the connecting pipe. The infiltrators are connected, and the infiltrators are buried in the soil.

Further, a preferred solution of the present utility model is: the water storage tank is provided with a liquid level gauge.

Further, a preferred solution of the present utility model is: a drain pipe is arranged at the bottom of the thick pressure control pipe.

Further, a preferred solution of the present utility model is: the multi-pipe connector is a container with an air vent at the upper end, and a plurality of connecting pipes protrude from the upper part of the container, and the connecting pipes are connected with the aspirator.

Furthermore, a preferred solution of the present invention is: the upper part of the multi-pipe connector is provided with an exhaust port.

Further, a preferred solution of the present utility model is: the permeator is a circular tube made of porous ceramics with one end sealed, and the hollow tube is used as a water flow channel.

The beneficial effects of the utility model:

The negative pressure irrigation device of the utility model overcomes the defects of low negative pressure water head and large negative pressure fluctuation of the existing negative pressure irrigation device, and realizes it by increasing the number of negative pressure controllers and adjusting the water level in the pressure control thick pipe, and overcomes the negative pressure The water head fluctuates greatly and is slow to pressure changes. The positive pressure water head is used to offset the surface tension of the outlet of the thin water supply tube, making it extremely sensitive to pressure changes.

The negative pressure irrigation device of the utility model does not need a power source, the height of the device is not more than one meter, and the structure is simple, but it can realize a negative pressure value several times higher than its height, and is convenient and adjustable, and the operation is simple, and the amplitude of the negative pressure is extremely small.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of negative pressure irrigation device of the present utility model;

Fig. 2 is the structural representation of water storage tank and negative pressure controller in Fig. 1;

Fig. 3 is the structural representation of the aspirator in Fig. 1;

In the figure, 1. Water storage tank, 2. Air supply pipe, 3. Liquid level gauge, 4. Water supply and air supply port, 5. Water supply port, 6. Water supply thin pipe, 7. Pressure control thick pipe, 8. First water outlet pipe , 9. Drain pipe, 10. Second outlet pipe, 11. Multi-pipe connector, 12. Exhaust port, 13. Connecting pipe, 14. Aspirator, 15. Exhaust pipe.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1-3, a high-stability negative pressure irrigation device includes a closed water storage tank 1, and an air supply pipe 2 is arranged inside the water storage tank 1, and the air supply pipe 2 extends into the bottom of the water storage tank 1 The top of the water storage tank 1 is provided with a water-filling and air-filling port 4, and the bottom of the water storage tank 1 is connected with a negative pressure controller through a first water outlet pipe 8. The negative pressure controller includes several thick tubes 7 for controlling pressure. The water supply thin tube 6 is arranged inside the pressure thick tube 7, and the pressure control thick tube 7 is connected in parallel through the water supply thin tube 6, and the water inlet of the water supply thin tube 6 passes through the bottom of the pressure control thick tube 7 and is connected with the water storage tank 1 The water outlet of the thin water supply pipe 6 extends into the upper part of the thick pressure control pipe 7, the top of the thick pressure control pipe 7 is provided with a water inlet 5, and the bottom of the thick pressure control pipe 7 is connected to the multi-pipe through the second water outlet pipe 10 The multi-pipe connector 11 communicates with the aspirator 14 through the connecting pipe 13, and the aspirator 14 is buried in the soil.

The negative pressure irrigation device of the utility model can obtain the required negative pressure difference by setting a reasonable structure of the negative pressure controller. Generally, the height of the water storage tank 1 is not more than one meter during the installation process, and the height of the negative pressure controller is slightly lower than that of the storage tank. The water tank 1 is fixed on the water storage tank 1. Each thick pressure-control tube 7 can provide a negative pressure difference equivalent to about 90% of the length of the thick pressure-control tube 7 , and the required negative pressure difference can be obtained conveniently and quickly by adjusting the number of thick pressure-control tubes.

Preferably: the water storage tank 1 is provided with a liquid level gauge 3 . Setting the liquid level gauge 3 can conveniently and quickly observe the change of the liquid level in the water storage tank 1, and conveniently record the amount of irrigation water.

Preferably: the bottom of the thick pressure control tube 7 is provided with a drain pipe 9, which is convenient for adjusting the height of the water column in the thick pressure control tube 7, and is used to empty the water in the thick pressure control tube when the device is not in use.

Preferably: the multi-pipe connector 11 is a container with an air vent at the upper end, and a plurality of connecting pipes 13 protrude from the upper part of the container, and the connecting pipes 13 are connected with the aspirator 14 . With such a structure, multiple aspirators 14 can be connected in parallel through the multi-pipe connector 11, and each aspirator 14 does not affect each other, so as to avoid the situation that the entire system stops working due to air leakage of individual aspirators 14 in the system.

Preferably: the upper part of the multi-pipe connector 11 is provided with an exhaust port 12 .

Preferably: the permeator 14 is a section of sealed round tube made of porous ceramics, the inside of the round tube is provided with a cavity for water flow passage, the open end of the round tube is sealed by a rubber plug, and an exhaust gas is provided on the rubber plug. Tube 15. When in use, it communicates with the connecting pipe 13 through a rubber stopper. The structure of the siphon 14 is similar to the pottery head of the negative pressure soil moisture meter, and its working principle is that the siphon 14 has many tiny voids, and after being soaked by water, a layer of water film is formed in the pores. After the pores in the percolator 14 are all filled with water, the water in the pores has tension, which can ensure that water passes through the percolator 14 under a certain pressure, but prevents air from passing through. When the water-filled and sealed percolator 14 is buried in water-unsaturated soil, the water film is connected to the soil water, creating a hydraulic connection. When the water potential of the soil system is not equal, the water flows from the high water potential through the infiltrator 14 to the low water potential until the water potential of the two systems is balanced.

The operation process of the utility model: connect the negative pressure irrigation device well, connect the multi-pipe connector 11 with the permeator 14, and then fill the permeator 14 with water and bury it in the soil; or first bury the permeator 14 in the soil, from Exhaust pipe 15 carries out pumping and filling water, comprises the following steps:

(1) Open the water filling and exhaust port on the top of the water storage tank 1, and close the water filling and air replenishing port 4 with a rubber plug when the water in the tank is full;

(2) Open the water inlet 5 on the negative pressure controller, add water to the pressure control thick pipe 7 to the space that can meet the required negative pressure height, and then close the water inlet 5, keep the pressure control thick pipe 7 under the water filling process The drain pipe 9 and the second outlet pipe 10 are in a clamped state;

(3) After adding water, find the balance point when the whole device works normally. The specific method is: open the second water outlet pipe 10, slightly bend the mouth of the second water outlet pipe 10, and slowly move the mouth of the second water outlet pipe 10 down , water flows out from the tube under the action of gravity, and as the water flows out, a negative pressure is formed in the pressure control thick tube 7, and water is supplied from the water storage tank 1 to the water supply thin tube 6 through the first outlet tube 8, and the water reaches After the top of the thin water supply pipe 6 falls into the thick pressure control pipe 7, observe the state of the second water outlet pipe 10 when it is like flowing water but not flowing water. This position is the equilibrium position when the device works normally. The water storage tank 1 The distance from the water outlet to this position is the maximum negative pressure height that can be controlled;

(4) After finding the equilibrium position, fix the multi-pipe connector 11 at this position and communicate with the second water outlet pipe 10. The multi-pipe connector 11 communicates with the aspirator 14 through the connecting pipe 13 for negative pressure irrigation.

The negative pressure irrigation device of the present utility model is realized by increasing the number of negative pressure controllers and adjusting the height of the water column in the pressure control thick tube 7, and overcomes the large fluctuation of the negative pressure water head, and uses the positive pressure water head to offset the surface of the water outlet of the water supply thin tube 6 Tension, making it extremely sensitive to pressure changes is achieved.

The negative pressure irrigation device of the utility model does not need a power source, the height of the device is not more than one meter, and the structure is simple, but it can realize a negative pressure value several times higher than its height, and is convenient and adjustable, and the operation is simple, and the amplitude of the negative pressure is extremely small.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (6)

1. a high stability Negative pressure irrigation device, it is characterized in that: comprise an airtight water tank, described water tank inside is provided with a blowdown pipe, described blowdown pipe extend into the bottom of water tank, the top of water tank is provided with the gas supplementing opening that adds water, the bottom of water tank is connected with negative pressure controller by the first outlet pipe, described negative pressure controller comprises some pressure control extra heavy pipes, every root pressure control extra heavy pipe inside is provided with water supply tubule, the water inlet of water supply tubule passes the bottom of pressure control extra heavy pipe and is connected with water tank, be in parallel by water supply tubule between pressure control extra heavy pipe, the delivery port of described water supply tubule extend into the top of pressure control extra heavy pipe, the top of described pressure control extra heavy pipe is provided with filler, the bottom of pressure control extra heavy pipe is connected with multitube connector by the second outlet pipe, described multitube connector is communicated with imbibition device by tube connector, described imbibition device is embedded in soil.

2. a kind of high stability Negative pressure irrigation device according to claim 1, is characterized in that: described water tank is provided with liquid level gauge.

3. a kind of high stability Negative pressure irrigation device according to claim 1, is characterized in that: the bottom of described pressure control extra heavy pipe is provided with drainpipe.

4. a kind of high stability Negative pressure irrigation device according to claim 1, is characterized in that: described multitube connector is the container that there is blow vent a upper end, and upper vessel portion stretches out many tube connectors, and tube connector is connected with imbibition device.

5. a kind of high stability Negative pressure irrigation device according to claim 4, is characterized in that: described multitube connector top is provided with exhaust outlet.

6. a kind of high stability Negative pressure irrigation device according to any one of claim 1-5, is characterized in that: described imbibition device is the pipe of one end sealing taking porous ceramics as material making, and pipe hollow is used as water stream channel.