JP2022072681A - Fluid fertilizer supply device - Google Patents

Abstract

To provide a fluid fertilizer supply device capable of achieving both of stable supply of a fluid fertilizer and work efficiency with a simplified structure.SOLUTION: A fluid fertilizer supply device 11 is a device for supplying to a port, a fluid fertilizer for performing flowing fertilization to a farm field, and comprises: set flow rate derivation means 12 for deriving a set flow rate of the fluid fertilizer; a fluid fertilizer supply pipe 13 for flowing the fluid fertilizer from the set flow rate derivation means; and a base material 14 comprising the set flow rate derivation means and the fluid fertilizer supply pipe. A lower end part of the base material has an insertion part 14b inserted into the farm field. The fluid fertilizer supply pipe comprises: a plurality of fluid fertilizer supply holes 13a extending in a direction crossing an insertion direction of the base material, and flowing the fluid fertilizer into the farm field in a submerged state under a water surface. The plurality of fluid fertilizer supply holes has an equal hole diameter and is provided on each of both ends of the fluid fertilizer supply pipes.SELECTED DRAWING: Figure 3

Description

Application for application of Article 30, Paragraph 2 of the Patent Law Test date: January 9, 2nd year of Reiwa Test location: JA Zenno Agricultural Farming and Technology Center (4-18-1 Higashiyawata, Hiratsuka City, Kanagawa Prefecture)

The present invention relates to a liquid fertilizer supply device, and more particularly to a liquid fertilizer supply device for efficiently supplying liquid fertilizer when pouring fertilizer into a field (paddy field).

As a method of fertilizing a field in paddy rice cultivation, there is known a pouring fertilizer application method in which fertilizer is applied on a stream of water flowing into a field from a water outlet in a state where the inundation depth is low. As the liquid fertilizer supply device used when performing this pouring fertilizer application, a liquid fertilizer supply device having a structure for supplying a fixed ratio of liquid fertilizer to the water flowing into the field from the water outlet is used (for example,). See Patent Document 1).

JP-A-2017-772210

In recent years, with the development of fields for the purpose of improving agricultural productivity, there has been a demand for a method for labor-saving fertilization work for large-scale fields. However, the liquid fertilizer supply device described in Patent Document 1 requires a separate jig for installing the liquid fertilizer storage tank when fertilizing the field, and is used for installing or withdrawing the liquid fertilizer supply device. There was a problem that it took time and effort.

Therefore, an object of the present invention is to provide a liquid fertilizer supply device capable of achieving both stable supply of liquid fertilizer and work efficiency with a simple configuration.

In order to achieve the above object, the liquid fertilizer supply device of the present invention is a liquid fertilizer supply device for supplying liquid fertilizer to a water outlet when pouring fertilizer into a field, and is a liquid fertilizer having a preset flow rate. A set flow deriving means for deriving the liquid fertilizer, a liquid fertilizer supply pipe for flowing the liquid fertilizer from the set flow rate deriving means, and a base member provided with the set flow rate deriving means and the liquid fertilizer supply pipe. At the lower end of the member, an insertion portion to be inserted into the field is provided, and the liquid fertilizer supply pipe extends in a direction intersecting the insertion direction of the base member and is submerged under the water surface. It has a plurality of liquid fertilizer supply holes for flowing out the liquid fertilizer to the field, and the plurality of liquid fertilizer supply holes have the same pore diameter and are provided at least at both ends of the liquid fertilizer supply pipe. It is a feature.

Further, at the upper end of the base member, a liquid fertilizer storage tank for storing the liquid fertilizer and a liquid level holding means for holding the liquid level of the liquid fertilizer in the liquid fertilizer storage tank at a constant height are provided. The liquid level holding means is a liquid fertilizer introduction nozzle that introduces liquid fertilizer into the liquid fertilizer storage tank from the outside, and a lower end of the liquid fertilizer introduction nozzle when the liquid fertilizer rises as the liquid level in the liquid fertilizer storage tank rises. The set flow rate derivation means includes an adjustment valve that can set the amount of the liquid fertilizer to be derived from the liquid fertilizer storage tank, and a metering that can confirm the amount of the liquid fertilizer. It is provided with a cylinder, a guide cylinder for flowing the liquid fertilizer derived from the measuring cylinder into the liquid fertilizer supply pipe, and a liquid fertilizer outlet pipe communicating between the measuring cylinder and the guide cylinder, and the measuring cylinder is transparent. It is made of a material and is characterized by having a scale on the peripheral surface indicating the amount of the liquid fertilizer to be derived.

Further, the base member has a cylindrical shape extending in the vertical direction, has an fitting portion in which the liquid fertilizer storage tank is fitted and fixed at the upper end portion, and has an inclined cross section forming the insertion portion at the lower end portion. The liquid fertilizer supply pipe supports the measuring cylinder and the guide cylinder on both sides of the base member in a state of penetrating the base member in the radial direction, and the liquid fertilizer outlet pipe has flexibility. It is a detachable pipe, and is characterized in that the intermediate portion is bent along the outer peripheral surface of the base member.

In addition, when the amount of water supplied to the water port is equal to or less than the set flow rate provided upstream of the liquid fertilizer supply pipe and downstream of the set flow rate derivation means in the flow path of the liquid fertilizer. It is characterized by being equipped with a liquid fertilizer supply control means for stopping the inflow of liquid fertilizer into the liquid fertilizer supply pipe.

According to the liquid fertilizer supply device of the present invention, since the set flow rate derivation means and the liquid fertilizer supply pipe are provided in the base member to be inserted into the field, these can be handled integrally for efficient installation and withdrawal. can. In addition, since the liquid fertilizer supply pipe extends in a direction intersecting the insertion direction of the base member and the liquid fertilizer supply holes are provided at both ends thereof, the installation direction of the liquid fertilizer supply device can be easily determined and each other. The liquid fertilizer supply holes located at a distance can effectively supply the liquid fertilizer to the entire field. Furthermore, since the pore diameters of each hole in the liquid fertilizer supply pipe are all the same, as long as the liquid fertilizer supply pipe is submerged, the liquid fertilizer can be evenly discharged from each hole, and a certain amount. Liquid fertilizer can be evenly supplied to the field.

It is a front view of the liquid fertilizer supply apparatus which shows the 1st Embodiment example of this invention. It is also a side view. It is also a front sectional view. FIG. 1 is an IV-IV cross section of FIG. FIG. 3 is a sectional view taken along line VV of FIG. FIG. 1 is a sectional view taken along line VI-VI of FIG. It is a front view of the liquid fertilizer supply apparatus which shows the 2nd Embodiment of this invention. It is also a side view. FIG. 7 is a cross-sectional view taken along the line IX-IX of FIG. Similarly, it is explanatory drawing which shows the operation of the liquid fertilizer supply control means.

1 to 6 show the liquid fertilizer supply device according to the first embodiment of the present invention. The first liquid fertilizer supply device 11 is basically a lightweight and strong material, for example, a combination of a plurality of vinyl chloride pipes integrally formed, and is set to derive a liquid fertilizer having a preset flow rate. The base member includes a flow rate derivation means 12, a liquid fertilizer supply pipe 13 into which the liquid fertilizer from the set flow rate derivation means 12 flows in, and a base member 14 provided with the set flow rate derivation means 12 and the liquid fertilizer supply pipe 13. By inserting the lower end of 14 into the field, it can be installed in an upright position.

The base member 14 has a cylindrical shape extending in the vertical direction, has a bottomed cylindrical liquid fertilizer storage tank 15 for storing liquid fertilizer at the upper end portion, and has an fitting portion 14a into which the liquid fertilizer storage tank 15 is fitted and fixed. It has an insertion portion 14b having an inclined cross section formed by cutting diagonally.

In the liquid fertilizer storage tank 15, a liquid level holding means 16 for holding the liquid level of the liquid fertilizer at a constant height is provided. The liquid level holding means 16 is a float valve body 19 that opens and closes a liquid fertilizer introduction nozzle 18 provided in the center of a lid 17 that covers the upper opening of the liquid fertilizer storage tank 15 and a valve opening 18a provided at the lower end of the liquid fertilizer introduction nozzle 18. And have. Further, a ventilation hole (not shown) for communicating the inside and outside of the tank is provided in the upper part of the liquid fertilizer storage tank 15.

The liquid fertilizer introduction nozzle 18 can be connected to a liquid fertilizer introduction pipe that serves as a liquid fertilizer introduction route connected to a large-capacity liquid fertilizer supply tank (not shown) installed at an appropriate position outside the liquid fertilizer storage tank 15. The liquid fertilizer in the liquid fertilizer supply tank installed at a high place passes through the liquid fertilizer introduction pipe by natural flow and flows into the inside of the liquid fertilizer storage tank 15 from the liquid fertilizer introduction nozzle 18.

The float valve body 19 moves up and down as the liquid level in the liquid fertilizer storage tank 15 moves up and down, and a PET bottle having an outer diameter slightly smaller than the inner diameter of the liquid fertilizer storage tank 15 is used as the float valve body 19. A valve body portion 19a capable of closing the valve opening 18a is provided on the upper surface of the cap.

It is preset that the liquid fertilizer flows into the liquid fertilizer storage tank 15 from the liquid fertilizer introduction nozzle 18 and the liquid level in the liquid fertilizer storage tank 15 rises, and the float valve body 19 rises as the liquid level rises. When the liquid level is reached, the valve body portion 19a closes the valve opening 18a to stop the inflow of the liquid fertilizer from the liquid fertilizer introduction nozzle 18. When the liquid fertilizer in the liquid fertilizer storage tank 15 is derived by the set flow rate derivation means 12 and the liquid level in the liquid fertilizer storage tank 15 is lowered, the float valve body 19 is lowered as the liquid level is lowered, and the valve body portion. The liquid fertilizer 19a separates from the valve opening 18a and the liquid fertilizer flows into the liquid fertilizer storage tank 15 from the liquid fertilizer introduction nozzle 18. Therefore, the valve port 18a is opened and closed by the vertical movement of the float valve body 19 accompanying the vertical movement of the liquid level in the liquid fertilizer storage tank 15, so that the liquid level in the liquid fertilizer storage tank 15 is kept constant.

The set flow rate derivation means 12 has an adjustment valve 20 capable of setting the amount of liquid fertilizer derived from the liquid fertilizer storage tank 15, and a bottomed cylindrical shape capable of confirming the amount of liquid fertilizer derived by operating the adjustment valve 20. The measuring cylinder 21, the bottomless cylindrical guide cylinder 22 that allows the liquid fertilizer derived from the measuring cylinder 21 to flow down into the liquid fertilizer supply pipe 13, and the liquid fertilizer outlet pipe 23 that communicates between the measuring cylinder 21 and the guide cylinder 22. And have.

The measuring cylinder 21 and the guide cylinder 22 are arranged on both sides of the base member 14 in the radial direction (left-right direction) with a predetermined length. Among them, the measuring cylinder 21 is made of a transparent material, and the lower end opening is closed by the bottom lid 21a. Further, a scale 21b is attached to the peripheral surface of the measuring cylinder 21 to indicate the amount of liquid fertilizer to be derived.

The adjusting valve 20 and the measuring cylinder 21 are communicated with each other by a liquid fertilizer introduction pipe 24 along the longitudinal direction (vertical direction) of the base member 14. Specifically, one end (lower end) of the liquid fertilizer introduction pipe 24 is connected to the lower outer peripheral surface of the measuring cylinder 21 via a joint member 25, and the other end (upper end) is connected to the valve body 20a via the joint member 26. It is connected.

The valve body 20a of the adjusting valve 20 is screwed and fixed to the lower outer peripheral surface of the liquid fertilizer storage tank 15, and is rotated by the handle 20b. By this rotation, the valve body of the valve body 20a is slightly moved in the horizontal direction, and the amount of liquid fertilizer derived from the liquid fertilizer storage tank 15 is adjusted. Here, if the liquid level of the liquid fertilizer introduced into the measuring cylinder 21 is adjusted to the scale 21b by operating the adjusting valve 20, the amount of liquid fertilizer led out to the liquid fertilizer outlet pipe 23 is increased or decreased based on the liquid level. Will be possible.

The liquid fertilizer lead-out pipe 23 is a pipe made of a flexible material, for example, a vinyl tube having an inner diameter of 6 mm, and both ends thereof can be attached to and detached from the measuring cylinder 21 and the guide cylinder 22 via joint members 27 and 28, respectively. .. Further, by attaching the connection ports of both joint members 27 and 28 toward the outer peripheral surface tangent direction of the base member 14, the intermediate portion of the liquid fertilizer outlet pipe 23 is bent in an arc shape along the outer peripheral surface of the base member 14. There is. Here, if a plurality of liquid fertilizer outlet pipes 23 having different lengths are prepared, it is possible to increase or decrease the amount (flow rate) of the liquid fertilizer to be derived based on the selected length.

The liquid fertilizer supply pipe 13 is fixed by penetrating a position slightly above the insertion portion 14b of the base member 14 in the radial direction, and the length protruding from the base member 14 is uniform on the left and right and is subjected to the insertion operation. It is formed to a length that allows contact surface pressure to be obtained so that it does not sink from the state of being in contact with the field (ground surface). Further, the liquid fertilizer supply pipe 13 is provided with upward connecting portions (pipe fitting portions) 29 and 30 into which the measuring cylinder 21 and the guide cylinder 22 are fitted. As a result, the measuring cylinder 21 and the guide cylinder 22 are stably supported on the liquid fertilizer supply pipe 13 on both sides of the base member 14.

Further, the liquid fertilizer supply pipe 13 has liquid fertilizer supply holes 13a for flowing out the liquid fertilizer to the field at a total of three locations at both ends and the central portion in the longitudinal direction (left-right direction). All of these liquid fertilizer supply holes 13a have the same diameter, for example, a diameter of 3 mm, and the center positions are aligned in the insertion direction of the base member 14. As a result, when the liquid fertilizer supply pipe 13 is grounded to the field, all the liquid fertilizer supply holes 13a are held at the same height position.

When the liquid fertilizer supply device 11 formed in this way is used to pour fertilizer into a field, a liquid fertilizer having a predetermined concentration or a liquid fertilizer obtained by dissolving solid fertilizer in water at a predetermined concentration is placed in a liquid fertilizer supply tank. At the same time as charging, the liquid fertilizer supply tank and the liquid fertilizer introduction nozzle 18 are connected by a liquid fertilizer introduction pipe. Here, when the position (supply direction) of the liquid fertilizer supply hole 13a is confirmed and the liquid fertilizer supply device 11 is inserted near the water port, the liquid fertilizer supply pipe 13 is submerged under the water surface and grounded. In this way, the liquid fertilizer supply device 11 is installed in the field in a stable upright posture, that is, in a horizontal state with the liquid fertilizer supply pipe 13.

The liquid level in the measuring cylinder 21 is set according to the amount of liquid fertilizer supplied to the water outlet. The relationship between the height difference between the liquid level in the measuring cylinder 21 and the liquid fertilizer supply hole 13a and the liquid fertilizer supply amount (cc / hour) can be obtained by an experiment. That is, the relationship between the two is required in advance according to the type and concentration of the liquid fertilizer, and the scale 21b of the measuring cylinder 21 is attached so as to meet the required supply amount.

When the adjusting valve 20 is opened to raise the liquid level in the measuring cylinder 21, the liquid pressure is applied and the flow velocity of the liquid fertilizer in the liquid fertilizer outlet pipe 23 increases. Here, the liquid level is adjusted to the scale 21b of the measuring cylinder 21, and the supply amount of the liquid fertilizer is set. As a result, the liquid fertilizer that has flowed down from the guide tube 22 through the liquid fertilizer lead-out pipe 23 evenly flows out from the three liquid fertilizer supply holes 13a provided in the liquid fertilizer supply pipe 13. That is, the liquid fertilizer flowing out from the liquid fertilizer supply hole 13a is mixed with the flow of irrigation water, and the flow from the hole in the central portion passes through the through hole 13b of the liquid fertilizer supply pipe 13 in the front direction and the holes at both ends. The flow from is supplied over the entire field while being dispersed on both the left and right sides.

As described above, according to the first liquid fertilizer supply device 11, since the set flow rate derivation means 12 and the liquid fertilizer supply pipe 13 are provided on the base member 14 to be inserted into the field, they can be handled and installed integrally. Withdrawal can be done efficiently. Further, since the liquid fertilizer supply pipe 13 extends in a direction intersecting the insertion direction of the base member 14 and the liquid fertilizer supply holes 13a are provided at both ends thereof, the liquid fertilizer supply device 11 can be easily installed. The liquid fertilizer can be effectively supplied to the whole field by the liquid fertilizer supply holes 13a located apart from each other. Further, since the pore diameters of the holes 13a in the liquid fertilizer supply pipe 13 are all the same, the liquid fertilizer can be evenly discharged from the holes 13a as long as the liquid fertilizer supply pipe 13 is submerged. Therefore, a certain amount of liquid fertilizer can be evenly supplied to the field.

Further, in the first configuration, since the configuration of the liquid fertilizer storage tank described in Patent Document 1 is partially diverted, quantitative supply can be achieved at low cost, and in addition, the set flow rate derivation means. As 12, an adjusting valve 20 capable of setting the amount of liquid fertilizer to be taken out from the liquid fertilizer storage tank 15, a measuring cylinder 21 capable of confirming the amount of being taken out, and a liquid fertilizer supply pipe using the liquid fertilizer drawn out from the measuring cylinder 21. Since the guide cylinder 22 that flows down into the 13 and the liquid fertilizer outlet pipe 23 that communicates between them are provided, a certain ratio of liquid fertilizer can be reliably supplied to the water that flows into the field from the water outlet. .. Further, since the length can be changed by exchanging the liquid fertilizer lead-out pipe 23, the supply amount can be adjusted by increasing or decreasing the flow path resistance, and thus the improvement of the supply accuracy can be easily achieved. In addition, even if the liquid fertilizer lead-out pipe 23 becomes long, the slack can be eliminated by a simple process of simply wrapping it around the outer periphery of the base member 14, which is excellent in practicality.

Further, since the base member 14 has the fitting portion 14a and is integrally formed with the liquid fertilizer storage tank 15, the measuring cylinder 21 and the guide cylinder 22 can be cohesively arranged in the vicinity thereof, which is convenient for use and storage. Sex improves. In particular, since the base member 14 has an inclined cross section forming the insertion portion 14b at the lower end portion, not only the manufacturability can be improved but also the labor of the installation work can be reduced. Further, since the measuring cylinder 21 and the guide cylinder 22 are supported by the liquid fertilizer supply pipe 13 penetrating the base member 14 in the radial direction, the structure of the liquid fertilizer supply device 11 having excellent durability is realized.

7 to 10 show the liquid fertilizer supply device in the second embodiment of the present invention. In the following description, the same components as those shown in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 7 to 9, the second liquid fertilizer supply device 51 has the characteristic configuration of the first liquid fertilizer supply device 11 as it is, and is further provided with the liquid fertilizer supply control means 52 in the field. The supply of liquid fertilizer to is stopped, or the amount of liquid fertilizer supplied can be increased or decreased.

The liquid fertilizer supply control means 52 is provided upstream of the liquid fertilizer supply pipe 13 and downstream of the set flow rate derivation means 12 in the pipeline through which the liquid fertilizer flows, and is a joint member (elbow) attached to the guide cylinder 53. ) 54. The shaft-shaped valve body 56 having a shaft shape and the shaft portion of the valve body 56 penetrating the peripheral surface of the guide cylinder 53 are inserted, and the tapered peripheral surface 56a is urged in a direction of pressing against the receiving port 54a of the joint member 54. A flat plate-shaped field water supply that is pivotally supported by a coil spring 57 and a rotation shaft 58 along the longitudinal direction of the base member 14 and can rotate around the rotation shaft 58 by receiving a flow of water supplied to the water port. It has a state detection fin 59 and a chain 60 having one end connected to the base end portion of the valve body 56 and the other end connected to the rotation base portion of the field water supply state detection fin 59.

As a result, when the amount of water supplied is equal to or less than the flow rate (set flow rate) set in consideration of the spring characteristics of the coil spring 57, the elastic force of the coil spring 57 causes the tapered peripheral surface 56a of the valve body 56 to be the joint member 54. The state of being pressed against the receiving port 54a (closed state) is reached, and the inflow of liquid fertilizer into the liquid fertilizer supply pipe 13 is stopped. On the other hand, when the supply amount of water is equal to or higher than the set flow rate, the field water supply state detection fin 59 rotates at a predetermined angle in the direction along the flow of water, and the valve body 56 pulled by the chain 60 is accompanied by this. The tapered peripheral surface 56a is separated from the receiving port 54a of the joint member 54 (open state) against the elastic force of the coil spring 57, and the inflow of the liquid fertilizer into the liquid fertilizer supply pipe 13 is continued.

That is, when the irrigation water is not supplied to the field, the field water supply state detection fin 59 is held in the non-operating position (solid line in FIG. 9), and when the irrigation water supply is started, the field receives the flow of the irrigation water. The water supply state detection fin 59 starts to rotate, and the valve gradually shifts from the closed state to the open state. Then, the valve is fully opened at the operating position (imaginary line in FIG. 9) where the rotation of the field water supply state detecting fin 59 is maximized.

When the liquid fertilizer supply device 51 formed in this way is used to pour fertilizer into a field, the liquid fertilizer supply device 51 is installed near the water outlet in the same procedure as in the first embodiment described above. Here, as shown in FIG. 10, a water supply valve 61 for adjusting the amount of water supplied from the water supply pipe (not shown) is installed at the water port, and the handle 61a of the water supply valve 61 is operated by operating the water supply valve 61. A predetermined amount of water is supplied to the field. In the liquid fertilizer supply control means 52, when the field water supply state detecting fin 59 rotates in response to the flow of water, the valve is opened and the supply of liquid fertilizer to the field is started. As a result, by mixing the liquid fertilizer supplied from the liquid fertilizer supply device 51 and the irrigation water supplied to the water outlet, the irrigation water in a state in which a predetermined amount of liquid fertilizer is mixed is supplied to the field.

By the way, depending on the usage conditions, it is expected that the flow rate of water will decrease during the fertilizer application work, but according to the second liquid fertilizer supply device 51, when the supply amount of water drops below the set flow rate, The field water supply state detection fin 59 returns to the original position, the valve is closed, and the inflow of liquid fertilizer into the liquid fertilizer supply pipe 13 is stopped. As a result, it is possible to avoid the occurrence of a pool of liquid fertilizer caused by a decrease in the amount of water supplied. That is, after the fertilizer application work is started, the liquid fertilizer supply control means 52 makes it possible to match the outflow of the liquid fertilizer with the supply state of the irrigation water without any manual operation, and the liquid fertilizer is applied to the field. The mixed irrigation water can be continuously supplied at a constant mixing ratio.

The present invention is not limited to the above-mentioned embodiment, and the set flow rate derivation means can be configured by incorporating a commercially available small metering pump. In this case, the pump main body is fixed to the mounting plate provided on the base member, and the liquid fertilizer introduction pipe is connected to the suction side and the liquid fertilizer outlet pipe is connected to the discharge side. Further, from the viewpoint of installability, the base member may be provided with an insertion portion (leg portion) to be inserted into the field, and various configurations are applied depending on the conditions of the field and the water outlet. Further, the plurality of liquid fertilizer supply holes may all have the same hole diameter, and holes can be provided at appropriate positions including both ends of the liquid fertilizer supply pipe. In this case, once the liquid fertilizer supply pipe is submerged under the surface of the water, the liquid fertilizer in the pipe is evenly discharged to the field in proportion to the size of the pore size, regardless of whether it is completely horizontal or slightly inclined. To.

Further, if the length of the liquid fertilizer lead-out pipe is set to such a length that it can be wound around the base member twice, a relatively gentle flow rate can be obtained, which is preferable, but the flow rate is not limited to this, and a desired flow rate can be obtained. You can choose the length that can be used. Further, the liquid fertilizer supply control means may be any mechanism as long as it can detect the flow of irrigation water and stop the supply of the liquid fertilizer. As long as it has a size, it is not limited to the above-mentioned ones, and various shapes can be adopted.

11 ... Liquid fertilizer supply device, 12 ... Set flow rate derivation means, 13 ... Liquid fertilizer supply pipe, 13a ... Liquid fertilizer supply hole, 13b ... Through hole, 14 ... Base member, 14a ... Insertion part, 14b ... Insertion part, 15 ... Liquid fertilizer storage tank, 16 ... Liquid level holding means, 17 ... Lid body, 18 ... Liquid fertilizer introduction nozzle, 18a ... Valve port, 19 ... Float valve body, 19a ... Valve body part, 20 ... Adjustment valve, 20a ... Valve body, 20b ... Handle, 21 ... Measuring cylinder, 21a ... Bottom lid, 21b ... Scale, 22 ... Guide cylinder, 23 ... Liquid fertilizer outlet pipe, 24 ... Liquid fertilizer introduction pipe, 25, 26, 27, 28 ... Joint member, 29, 30 ... Connecting part, 51 ... Liquid fertilizer supply device, 52 ... Liquid fertilizer supply control means, 53 ... Guide cylinder, 54 ... Joint member, 54a ... Receptacle, 55 ... Liquid fertilizer outlet pipe, 56 ... Valve body, 56a ... Tapered peripheral surface, 57 ... Coil spring, 58 ... Rotating shaft, 59 ... Field water supply status detection fin, 60 ... Chain, 61 ... Water supply valve, 61a ... Handle

Claims (4)

A liquid fertilizer supply device for supplying liquid fertilizer to a water outlet when pouring fertilizer into a field, from a set flow rate deriving means for deriving a preset flow rate of liquid fertilizer and a set flow rate deriving means. A liquid fertilizer supply pipe into which the liquid fertilizer flows, a base member provided with the set flow rate derivation means and the liquid fertilizer supply pipe are provided.
An insertion portion to be inserted into the field is provided at the lower end of the base member, and the liquid fertilizer supply pipe extends in a direction intersecting the insertion direction of the base member and is submerged under the water surface. It has a plurality of liquid fertilizer supply holes that allow the liquid fertilizer to flow out to the field.
The liquid fertilizer supply device, wherein the plurality of liquid fertilizer supply holes have the same diameter and are provided at least at both ends of the liquid fertilizer supply pipe. At the upper end of the base member, a liquid fertilizer storage tank for storing the liquid fertilizer and a liquid level holding means for holding the liquid level of the liquid fertilizer in the liquid fertilizer storage tank at a constant height are provided. The liquid level holding means is provided at the lower end of the liquid fertilizer introduction nozzle for introducing liquid fertilizer into the liquid fertilizer storage tank from the outside and the liquid fertilizer introduction nozzle when the liquid level rises as the liquid level in the liquid fertilizer storage tank rises. Equipped with a float valve body that closes the valve opening
The set flow rate derivation means includes an adjustment valve capable of setting the amount of the liquid fertilizer to be derived from the liquid fertilizer storage tank, a measuring cylinder capable of confirming the derived amount, and the liquid fertilizer derived from the measuring cylinder. A guide cylinder for flowing down into the liquid fertilizer supply pipe and a liquid fertilizer outlet pipe communicating between the measuring cylinder and the guide cylinder are provided.
The liquid fertilizer supply device according to claim 1, wherein the measuring cylinder is made of a transparent material and has a scale on the peripheral surface indicating the amount of the liquid fertilizer to be derived. The base member has a cylindrical shape extending in the vertical direction, has an fitting portion in which the liquid fertilizer storage tank is fitted and fixed at the upper end portion, and has an inclined cross section forming the insertion portion at the lower end portion.
The liquid fertilizer supply pipe supports the measuring cylinder and the guide cylinder on both sides of the base member in a state of penetrating the base member in the radial direction.
The liquid fertilizer supply device according to claim 2, wherein the liquid fertilizer lead-out pipe is a flexible and removable pipe, and an intermediate portion is bent along an outer peripheral surface of the base member. The liquid fertilizer supply is provided upstream of the liquid fertilizer supply pipe in the flow passage of the liquid fertilizer and downstream of the set flow rate derivation means, and when the supply amount of water supplied to the water port is equal to or less than the set flow rate. The liquid fertilizer supply device according to any one of claims 1 to 3, further comprising a liquid fertilizer supply control means for stopping the inflow of the liquid fertilizer into the pipe.

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