CN108738612B

CN108738612B - Paddy field irrigation system and method

Info

Publication number: CN108738612B
Application number: CN201810615406.9A
Authority: CN
Inventors: 陈奕筱
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-06-14
Filing date: 2018-06-14
Publication date: 2021-04-20
Anticipated expiration: 2038-06-14
Also published as: CN108738612A

Abstract

The invention provides a paddy field irrigation system and a method, belonging to the field of irrigation systems; the method is mainly used for preparing water and fertilizer to irrigate paddy fields; above-mentioned paddy field irrigation system includes liquid manure preparation equipment and irrigation control device, and liquid manure preparation equipment mainly used prepares liquid manure and irrigates the paddy field, and irrigation control device is connected with liquid manure preparation equipment through the main pipe for come the stop valve on automatic or the closing main pipe according to the water level in the paddy field. The automation degree of the whole process is higher, the labor intensity is reduced, and the working efficiency is improved. The method for preparing the water and fertilizer mainly adopts the equipment, so that the labor intensity can be reduced, and the working efficiency can be improved.

Description

Paddy field irrigation system and method

Technical Field

The invention relates to the field of irrigation systems, in particular to a paddy field irrigation system and method.

Background

A certain amount of water should be maintained in the paddy field, and a fertilizer needs to be applied regularly; in traditional agriculture, irrigation and fertilization are respectively carried out manually, or water and fertilizer are irrigated into a paddy field.

The water fertilizer is a solution formed by mixing and dissolving water and fertilizer according to a certain proportion, and in the traditional technology, the fertilizer is generally manually poured into the water for dissolving; the labor intensity is relatively high.

Therefore, the system and the method for irrigating the paddy field are provided, which have important significance for the development of modern agricultural technology.

Disclosure of Invention

The invention aims to provide a paddy field irrigation system which can conveniently prepare water and fertilizer.

Another object of the present invention is to provide a method for irrigating a paddy field, which utilizes the above-mentioned apparatus.

The invention is realized in the following way:

a paddy field irrigation system comprises water and fertilizer preparation equipment and an irrigation control device; the liquid manure preparation equipment includes:

the storage bin is used for storing fertilizer;

the weighing bin is positioned below the storage bin, the storage bin can convey fertilizer from the storage bin into the weighing bin, and the weighing bin is connected with a foundation through a weighing instrument;

the dissolving tank is arranged below the weighing bin, and a dry pipe is arranged at the bottom of the dissolving tank; a control valve is arranged on the main pipe;

the bottom of the weighing bin is also provided with a discharging pipe, a sealing plate and a sealing plate opening mechanism, the sealing plate is hinged with the discharging pipe, and the sealing plate can open or close the discharging pipe; when the sealing plate is opened, the fertilizer in the weighing bin can fall into the dissolving tank;

an elastic piece is arranged between the sealing plate and the blanking pipe, and the elastic piece enables the sealing plate to close the blanking pipe;

the sealing plate opening mechanism comprises a sewer pipe, a pull rope and a water bucket, wherein one end of the pull rope is connected with the sealing plate, and the other end of the pull rope is hung on the water bucket; the water bucket comprises a bucket body and a bottom plate, wherein an annular baffle is arranged at the bottom end of the bucket body, and the bottom plate is arranged in the bucket body and is arranged in a gap with the inner wall of the bucket body; the bottom plate is matched with the annular baffle plate to prevent water from leaking out of the water bucket; the barrel body is made of iron materials;

the sewer pipe is connected with the dissolving tank, and water in the dissolving tank can naturally flow out of the water bucket through the sewer pipe;

the bucket opening mechanism is arranged below the bucket and comprises a first electromagnet and an opening rod, the first electromagnet and the opening rod are both connected with a foundation, and the opening rod is vertically arranged;

the irrigation control device comprises:

the stop valve comprises a valve rod, and when the valve rod rotates within a preset angle range, the stop valve can open or close the branch pipe; one end of the branch pipe is communicated with a main pipe of the water and fertilizer preparation equipment, and the other end of the branch pipe is communicated with a paddy field;

and the water level control mechanism can detect the water level in the rice field and can control the opening and closing of the stop valve.

Further, in the present invention,

the bottom plate comprises a frustum-shaped shell and a guide cylinder, and the large end of the bottom plate is matched with the annular baffle; the guide cylinder is arranged outside the shell, one end of the guide cylinder is closed, and the other end of the guide cylinder is vertically connected with the small end of the shell and is communicated with the inside of the shell;

the free end of the opening rod is provided with a tip.

Further, in the present invention,

the blanking pipe is provided with a second electromagnet, and the second electromagnet can attract the sealing plate;

the water bucket opening structure further comprises a switch piece, and the switch piece is electrically connected with the second electromagnet; when the water bucket falls onto the first electromagnet, the switch piece can be triggered, so that the second electromagnet loses magnetism;

the pull rope is an elastic pull rope.

Further, in the present invention,

the water and fertilizer preparation equipment also comprises a controller, wherein a water inlet pipe is arranged on the dissolving tank, and a control valve is arranged on the water inlet pipe;

the controller is electrically connected with the weighing instrument, the control valve, the first electromagnet and the second electromagnet.

Further, in the present invention,

the dissolving tank comprises a plurality of inclined pipes, the inclined pipes are arranged at different heights of the dissolving tank, and stop valves are arranged on the inclined pipes; the downcomer is detachably connected with the inclined pipe.

Further, in the present invention,

the feeding pipe is characterized in that a material guide plate is further arranged below the discharging pipe, the material guide plate is obliquely arranged and connected with the foundation, and the fertilizer falling from the discharging pipe can be guided into the dissolving tank.

Further, in the present invention,

the water level control mechanism comprises a water level measuring cylinder, a floating part, a first connecting rod, a second connecting rod and a third connecting rod;

the water level measuring cylinder is arranged in the soil of the paddy field; the floating part is arranged in the water level measuring cylinder and is arranged in a clearance with the inner wall of the water level measuring cylinder;

one end of the first connecting rod is hinged with the floating piece, the other end of the first connecting rod is hinged with the second connecting rod, one end of the third connecting rod is hinged with the free end of the second connecting rod, and the other end of the third connecting rod is hinged with the free end of the valve rod;

the second connecting rod is pivoted with the branch pipe, so that the second connecting rod is of a lever structure;

when the floating part moves in the water level measuring cylinder, the valve rod can be driven to rotate within a preset angle through the first connecting rod, the second connecting rod and the third connecting rod.

Further, in the present invention,

an upper water inlet hole is formed in the upper part of the wall of the water level measuring cylinder, and a lower water inlet hole is formed in the lower part of the wall of the water level measuring cylinder; the upper water inlet hole extends perpendicular to the cylinder wall, and the lower water inlet hole extends obliquely upwards.

Further, in the present invention,

and a stirrer and a temperature sensor are arranged in the dissolving tank.

An irrigation method using the paddy field irrigation system comprises the following steps:

a. opening the storage bin, slowly putting the fertilizer into the weighing bin, and closing the storage bin when the fertilizer in the weighing bin reaches a preset weight;

b. adding water into the dissolving tank, when the water level reaches the connecting position of the sewer pipe and the dissolving tank, the water in the dissolving tank enters the water bucket through the sewer pipe, and when the water in the water bucket is enough, the gravity of the water bucket overcomes the elasticity of the elastic part on the sewer pipe, so that the sealing plate is opened, and the fertilizer falls into the dissolving tank; and stopping supplying water to the dissolving tank;

c. after the bucket falls onto the bucket opening mechanism, the bucket is opened, and water in the bucket flows out; the water bucket is sucked by the first electromagnet; the closing plate of the blanking pipe is kept open; when the fertilizer in the weighing bin completely falls down, the first electromagnet is closed to lose magnetism; the blanking plate of the blanking pipe is automatically closed under the action of the elastic part;

d. and opening a control valve on the main pipe.

The invention has the beneficial effects that:

the rice field irrigation system who obtains through above-mentioned design, it includes liquid manure preparation equipment and irrigation control device, and liquid manure preparation equipment mainly used prepares liquid manure and irrigates the rice field, and irrigation control device passes through the main pipe and is connected with liquid manure preparation equipment for come the stop valve on automatic or the closed main pipe according to the water level in the rice field. The liquid manure preparation equipment adopts the storage silo to add fertilizer for weighing the storehouse, and when the fertilizer in the storehouse of weighing reached and predetermine weight, closed the storage silo. When the water level in the dissolving tank reaches the preset water level, the sealing plate of the weighing bin can be automatically opened through the sealing plate opening mechanism, so that fertilizer is put into the dissolving tank to be dissolved to form water and fertilizer. Irrigation control device can adjust the switch of stop valve according to the height adaptability of water level in the paddy field when using to in time open the stop valve and supply moisture when the field water level is low excessively, in time close the stop valve and stop supplying water to suitable water level when irrigating, ensure to provide suitable water yield for the paddy field. The system has higher automation degree, reduces the labor intensity and improves the working efficiency.

The irrigation method obtained through the design mainly adopts the system, so that the labor intensity can be reduced, and the working efficiency can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a paddy field irrigation system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a weighing compartment, a dissolving tank and a sealing plate opening mechanism provided in the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a water bucket and a first electromagnet according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a water bucket opening mechanism provided in an embodiment of the present invention.

FIG. 5 is a schematic diagram of the irrigation control device according to an embodiment of the present invention in a low water level configuration;

FIG. 6 is a schematic diagram of an irrigation control device according to an embodiment of the present invention in a high water level configuration;

FIG. 7 is a plan view of a water level measuring cylinder and a floating member according to an embodiment of the present invention;

fig. 8 is a sectional view of a water level measuring cylinder according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first link according to an embodiment of the present invention.

Icon: 100-equipment for preparing liquid manure; 110-a storage bin; 112-door of the bin; 114-a square tube; 120-weighing bin; 121-a weighing instrument; 122-a blanking pipe; 124-closing plate; 126-a second magnet; 130-a dissolving tank; 140-a closure plate opening mechanism; 142-a downcomer; 144-a pull cord; 146-a bucket; 1461-annular baffle; 1462-barrel body; 1463-baseplate; 1464-housing; 1465-guide cylinder; 150-a bucket opening mechanism; 152-a first electromagnet; 153-a base; 154-opening lever; 156-a switch member; 160-a material guide plate; 170-dry pipe; 200-irrigation control means; 210-a manifold; 220-a shut-off valve; 222-a valve stem; 230-a water level control mechanism; 231-a first link; 2311-a first rod; 2312-a second stick body; 2313-connecting the cylinders; 232-a second link; 233-third link; 234-water level measuring cylinder; 2342-upper water inlet hole; 2344-lower water inlet hole; 235-a float; 240-a counterweight; 250-water measuring instrument; 300-a paddy field irrigation system; 400-paddy field; 410-soil.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Example 1:

referring to fig. 1, the present embodiment provides a paddy field irrigation system 300, which includes a liquid manure preparation apparatus 100 (fig. 2) and an irrigation control device 200, wherein the liquid manure preparation apparatus 100 is mainly used for preparing liquid manure to irrigate a paddy field 400, and the irrigation control device 200 is connected to the liquid manure preparation apparatus 100 through a main pipe 170 for automatically closing a stop valve on a branch pipe 210 according to the water level in the paddy field.

The water and fertilizer preparation equipment 100 mainly comprises a storage bin 110, a weighing bin 120 and a dissolving tank 130, wherein the storage bin 110 is used for storing fertilizer and adding a certain amount of fertilizer into the weighing bin 120; when the water level in the dissolving tank 130 reaches the preset water level, the fertilizer in the weighing bin 120 automatically falls into the dissolving tank 130 to be dissolved to form water and fertilizer.

Specifically, as shown in fig. 2, the storage bin 110 is disposed at the uppermost side, which is fixedly connected to the foundation. The lower part of the storage bin 110 is provided with a square pipe 114 and a bin door 112, and the bin door 112 is hinged with the square pipe 114 through a rotating shaft. The square tube 114 is also provided with a motor, the motor is connected with the rotating shaft through a worm and gear retrieval machine, and the motor drives the rotating shaft to rotate, so that the bin door 112 can be opened or closed. When the bin door 112 is opened, fertilizer can fall into the weighing bin 120.

The weighing bin 120 is located below the storage bin 110 and is connected with a foundation through a weighing instrument 121, a material guide plate 160 is further arranged between the weighing bin 120 and the dissolving tank 130, and fertilizer falling from the weighing bin 120 falls into the dissolving tank 130 along the material guide plate 160. The weighing bin 120 comprises a bin body and a blanking pipe 122 connected with the bin body, the blanking pipe 122 is a square pipe 114, and a sealing plate 124 is arranged at the end part of the blanking pipe 122. One side of the closing plate 124 is hinged to the discharging pipe 122 through a rotating shaft, and the other side of the closing plate 124 is connected to the discharging pipe 122 through an elastic member. The elastic force of the elastic member causes the closing plate 124 to close the feed pipe 122.

As shown in fig. 3 and 4, in order to open the sealing plate 124 and put the fertilizer into the dissolving tank 130, a sealing plate opening mechanism 140 is provided under the sealing plate 124, and the sealing plate opening mechanism 140 includes a drain pipe 142, a draw rope 144, and a water bucket 146. One end of the pull rope 144 is connected to the closing plate 124, and the other end is hung on the water bucket 146. The downcomer 142 includes an inclined section and a vertical section, one end of the vertical section is connected with the inclined section, and the other end is disposed above the water bucket 146; the inclined section is connected with the dissolving tank 130. When the water level in the dissolving tank 130 reaches the junction of the downcomer 142 and the dissolving tank 130, water can flow along the downcomer 142 into the water tub 146. As the water bucket 146 becomes heavier, eventually the water bucket 146 opens the sealing plate 124 by the pulling rope 144 against the elastic force between the sealing plate 124 and the discharging pipe 122, and the fertilizer falls into the dissolving tank 130.

In order to enable the door 112 to be automatically closed, a bucket opening mechanism 150 is further provided for opening the bucket 146 to discharge water, thereby allowing the closing plate 124 to be automatically closed by the elastic force. The water bucket opening mechanism 150 is arranged below the water bucket 146 and comprises a first electromagnet 152, an opening rod 154 and a base 153, wherein the first electromagnet 152 and the opening rod 154 are connected with the foundation through the base 153, and the opening rod 154 is vertically arranged.

The water bucket 146 comprises a cylindrical bucket body 1462 and a bottom plate 1463, the bottom end of the water bucket is provided with an annular baffle 1461, and the bottom plate 1463 is arranged in the bucket body 1462 and is arranged with a gap with the inner wall of the bucket body 1462; the bottom plate 1463 cooperates with the annular barrier 1461 to prevent water from leaking out of the water tub 146. When the water bucket 146 falls to the position of the opening lever 154, the opening lever 154 collides with the bottom plate 1463 to separate the bottom plate 1463 from the ring-shaped baffle 1461, and water flows out of the water bucket 146, and at this time, the bucket body 1462 continues to fall under the action of inertia and collides with the first electromagnet 152 to be attracted. Therefore, the sealing plate 124 is kept in an open state, when all the fertilizer in the weighing bin 120 falls down, the first electromagnet 152 is powered off, the magnetism of the first electromagnet is lost, the sealing plate 124 is lowered under the action of the elastic piece, the water bucket 146 is pulled up, and the bottom plate 1463 is reset.

In order to prevent the bottom plate 1463 from overturning to affect the reset when the bottom plate 1463 is separated from the ring-shaped baffle 1461, in the embodiment, the bottom plate 1463 comprises a frustum-shaped housing 1464 and a guide cylinder 1465, and the large end of the bottom plate 1463 is used for being matched with the ring-shaped baffle 1461. The guide cylinder 1465 is arranged outside the housing 1464, one end of the guide cylinder 1465 is closed, and the other end is vertically connected with the small end of the housing 1464 and is communicated with the inside of the housing 1464. The free end of the opening lever 154 is provided with a tip. Therefore, when the opening lever 154 opens the base plate 1463, the opening lever 154 can enter the guide cylinder 1465 along the tapered side wall even if the opening lever 154 is offset from the middle of the base plate 1463.

In order to prevent the sealing plate 124 on the blanking pipe 122 from being opened by mistake and influence the accuracy of the concentration of the water and the fertilizer; in this embodiment, the blanking pipe 122 is provided with a second electromagnet, and the second electromagnet can attract the sealing plate 124.

As shown in fig. 5, the opening structure of the water bucket 146 further includes a switch member 156, and the switch member 156 is electrically connected to the second electromagnet. The switch member 156 is button-shaped, and when pressed, the switch member 156 can de-energize the second electromagnet to lose magnetism; when released, the switch member 156 is reset. When the water bucket 146 falls onto the first electromagnet 152, the switch member 156 can be triggered, so that the second electromagnet loses magnetism; the draw cord 144 is an elastic draw cord 144.

With the above-described design, only when the water level in the dissolving tank 130 reaches the preset water level such that the water in the water tub 146 is sufficient, the water tub 146 overcomes the elastic force of the pulling rope 144, and finally falls onto the first electromagnet 152 to trigger the switch member 156. The second electromagnet is then de-magnetized and the stretching force is sufficient to overcome the force of the elastic member on the sealing plate 124, thereby allowing the sealing plate 124 to be opened.

In order to improve the automation level, the liquid manure preparation equipment 100 further comprises a controller, wherein a water inlet pipe is arranged on the dissolving tank 130, and a control valve is arranged on the water inlet pipe. The controller is electrically connected to the scale 121, the control valve, the first electromagnet 152, and the second electromagnet. When the fertilizer in the weighing bin 120 falls into the dissolving tank 130, the controller controls the first electromagnet 152 to automatically power off so as to lose magnetism. And, the controller can automatically open or close the door 112 of the storage bin 110 and the control valve of the inlet pipe of the dissolving tank 130 according to the preset adjustment.

Since the connection position of the inclined pipe and the dissolving tank 130 determines the height of the preset water level, in order to adjust the height of the preset water level, the dissolving tank 130 includes a plurality of inclined pipes, the inclined pipes are arranged at different heights of the dissolving tank 130, and the inclined pipes are provided with stop valves; the down pipes 142 are detachably connected to the inclined pipes.

Referring to fig. 1 and 6, the irrigation control device 200 includes a branch pipe 210, a pumping pipe (not shown), and the branch pipe 210. The branch pipe 210 is capable of sensing the water level in the paddy field 400 and is connected to the main pipe 170 through one end of the branch pipe 210. When the water level is too low, the water level control mechanism supplies water by opening the stop valve on the branch pipe 210; it can automatically close the branch pipe 210 when a desired water level is reached. After the rainstorm, when the water level is too high, the water pump on the water pumping pipeline is started to pump water to a proper water level. In addition, in order to make the water flow on the main pipe have enough pressure, a water pump is also arranged on the main pipe.

Specifically, the branch pipe 210 includes a water level measuring cylinder 234, a float 235, a first link 231, a second link 232, and a third link 233; the water level measuring cylinder 234 is vertically disposed in the soil 410 of the paddy field 400 and its upper end is beyond the ground of the paddy field 400 to prevent the soil from entering; the water in the paddy field 400 can be introduced into the water level measuring cylinder 234 through the through-holes on the lower end and the cylinder wall. The floating member 235 is disposed in the water level measuring cylinder 234, the rising and falling of the water level drives the floating member 235 to rise and fall, and the floating member 235 drives the valve rod on the stop valve to rotate through the first connecting rod 231, the second connecting rod 232 and the third connecting rod 233 which are hinged in sequence so as to open or close the stop valve on the branch pipe 210.

Referring to fig. 7 and 8, the water level measuring cylinder 234 is made of stainless steel tube, and has an opening at its upper end and a circular filter screen at its lower end. An upper water inlet hole 2342 is formed in the upper portion of the wall of the water level measuring cylinder 234, and a lower water inlet hole 2344 is formed in the lower portion of the wall; the upper inlet holes 2342 extend perpendicularly to the barrel wall, and the lower inlet holes 2344 extend obliquely upward. In addition, a cylindrical filter screen is further sleeved on the outer circumference of the water level measuring cylinder 234. When the water level measuring cylinder 234 is installed in the soil 410, the upper water inlet hole 2342 is located just above the ground; so that water above the ground can enter the water level measuring cylinder 234 through the upper water inlet hole 2342. The lower water inlet is formed in the soil 410, and water in the soil 410 may permeate into the water level measuring cylinder through the lower water inlet hole 2344 and the lower end opening.

Since the water level measuring cylinder 234 is used to detect water above and below the ground in the paddy field, and the float 235 is freely movable in the water level measuring cylinder 234; the soil should be prevented as much as possible from entering the water level measuring cylinder 234.

In this embodiment, since the lower inlet hole 2344 extends obliquely upward, soil in the soil 410 is prevented from entering the water level measuring cylinder 234 through the lower inlet hole 2344. And because the section of thick bamboo wall and the bottom of water level measurement section of thick bamboo 234 all are provided with the filter screen, and some section of thick bamboo walls are located above ground, further prevent that the earth in soil 410 from entering into water level measurement section of thick bamboo 234.

The water level measuring cylinder 234 is provided with a floating member 235, and the floating member 235 has a cylindrical hollow structure with two closed ends. The upper part of the floating member 235 is hinged to a first connecting rod 231, one end of the first connecting rod 231 is hinged to the floating member 235, the other end of the first connecting rod 231 is hinged to the second connecting rod 232, one end of the third connecting rod 233 is hinged to the free end of the second connecting rod 232, and the other end of the third connecting rod 233 is hinged to the free end of the branch pipe 210.

The middle of the second link 232 is pivotally connected to the branch pipe 210, so that the second link 232 is in a lever structure. The "middle portion" does not refer to the middle position, but is distinguished from the end portions.

When the floating member 235 moves in the water level measuring cylinder 234, the valve core of the stop valve can be driven to rotate within a preset angle by the first link 231, the second link 232 and the third link 233. The preset angle in this embodiment is 90 deg., and in other embodiments the preset angle may be other angles, such as 125 deg..

Referring to fig. 9, since the minimum water levels required for the rice in different growth periods are different in depth, the first link 231 is provided in a telescopic structure in order to adjust the minimum water levels. The first link 231 includes a first rod body 2311, a connecting cylinder 2313 and a second rod body 2312, the first rod body 2311 and the second link 232 are in threaded connection through the connecting cylinder 2313, and the thread directions of the first link 231 and the second link 232 are opposite. When the total length of the first link 231 needs to be adjusted, the connecting cylinder 2313 is directly rotated.

And, in order to adjust the maximum water level of the rice, that is, to close the branch pipe 210 in time when the amount of water reaches a preset maximum water level. In this embodiment, a section of the second link 232 near the first link 231 is provided with a plurality of hanging holes, the counterweight 240 is hung in the hanging holes, and the maximum water level can be adjusted by moving the position of the counterweight 240 or increasing or decreasing the number of the counterweight 240.

In addition, the branch pipe 210 is provided with a water amount measuring instrument 250, which can directly adopt the prior art, and thus, a detailed description thereof will not be given. The water measuring instrument 250 is mainly used for monitoring the water consumption of the rice in different growth periods so as to provide relevant data for further scientific research.

The irrigation control device 200 provided in this embodiment works according to the following principle:

when the water level is too low (as shown in fig. 1), the floating member 235 moves downward under the action of the weight 240 and the self-weight, and drives the branch pipe 210 to rotate through the first connecting rod 231, the second connecting rod 232 and the third connecting rod 233, and gradually opens the branch pipe 210 for filling. When the water level rises again (as shown in fig. 6), the floating member 235 moves upwards under the action of the buoyancy force, so as to drive the branch pipe 210 to rotate reversely; when the water level rises to the preset maximum water level, the opening degree of the branch pipe 210 is 0, the branch pipe 210 is closed, and the water supply is stopped.

Since the water level measuring cylinder 234 is provided in the soil 410, it can measure the amount of water in the soil 410 when the ground surface is not ponded in the paddy field 400; thereby regulating the water supply from the branch pipe 210. This also matches the growth characteristics of rice, as rice needs to be sunned in the field at some time of the growing season, requiring no water above the ground; therefore, the water level measuring cylinder in this embodiment is not limited to a farm field with water.

The working principle of the paddy field irrigation system 300 provided by the embodiment is as follows:

before irrigation, water and fertilizer preparation equipment is required to be used for preparing a certain proportion of water and fertilizer; after the preparation is finished, the stop valve on the main pipe is opened, and the water and fertilizer are filled in the main pipe under the action of water pressure because the bottom of the dissolving tank is higher than the ground. When the water level in the paddy field is low, the water level control mechanism automatically opens the stop valves on the branch pipes for irrigation; and after the water reaches the preset water level, the stop valve is automatically closed.

Example 2:

this example provides a method of irrigating a paddy field using the system of example 1, comprising the steps of:

a. the fertilizer is slowly put into the weighing bin 120 by opening the storage bin 110, and when the fertilizer in the weighing bin 120 reaches the preset weight, the storage bin 110 is closed.

b. Adding water into the dissolving tank 130, when the water level reaches the position where the sewer pipe 142 is connected with the dissolving tank 130, the water in the dissolving tank 130 enters the water bucket 146 through the sewer pipe 142, and when the water in the water bucket 146 is enough, the gravity of the water bucket 146 overcomes the elastic force of the elastic part on the feeding pipe 122, so that the sealing plate 124 is opened, and the fertilizer falls into the dissolving tank 130; and the water supply to the dissolving tank 130 is stopped.

c. After the water bucket 146 falls onto the water bucket opening mechanism 150, the water bucket 146 is opened, and water in the water bucket 146 flows out; the water bucket 146 is sucked by the first electromagnet 152; the closure plate 124 of the down tube 122 remains open; when the fertilizer in the weighing bin 120 completely falls down, the first electromagnet 152 is closed to lose magnetism; the closing plate 124 of the feed pipe 122 is automatically closed by the elastic member.

d. And opening a stop valve on the main pipe.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A paddy field irrigation system is characterized by comprising water and fertilizer preparation equipment and an irrigation control device; the liquid manure preparation equipment includes:

the storage bin is used for storing fertilizer;

the irrigation control device comprises:

the stop valve comprises a valve rod, and when the valve rod rotates within a preset angle range, the stop valve can open or close the branch pipe;

one end of the branch pipe is communicated with a main pipe of the water and fertilizer preparation equipment, and the other end of the branch pipe is communicated with a paddy field;

the water level control mechanism can detect the water level in the paddy field and can control the opening and closing of the stop valve;

the free end of the opening rod is provided with a tip.

2. The rice field irrigation system as claimed in claim 1, wherein:

the pull rope is an elastic pull rope.

3. The paddy field irrigation system as claimed in claim 2, wherein:

4. The rice field irrigation system as claimed in claim 1, wherein:

5. The rice field irrigation system as claimed in claim 1, wherein:

6. The rice field irrigation system as claimed in claim 1, wherein:

7. The rice field irrigation system as claimed in claim 1, wherein:

8. The rice field irrigation system as claimed in claim 1, wherein:

and a stirrer and a temperature sensor are arranged in the dissolving tank.

9. A method of irrigation using the system for irrigation of paddy field according to any one of claims 1 to 8, characterized by comprising the steps of:

d. and opening a control valve on the main pipe.