JP3682384B2 - Chemical sprayer equipped with chemical stirring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chemical liquid agitating device, and more particularly to a chemical liquid agitating apparatus in which a chemical liquid is injected into a chemical liquid tank and stirred by the jet.
[0002]
[Prior art]
FIG. 5 shows a chemical sprayer (boom sprayer) 1 that is conventionally used for controlling a farm field. The chemical sprayer 1 is configured to spray chemicals on the field while traveling, for example, by being directly mounted on a tractor (not shown), and a vertically long chemical solution tank 5 is mounted on the support base 2. In addition, spraying booms 4, 4 are arranged on the left and right sides of the chemical solution tank 5 so as to be vertically movable and turnable.
[0003]
In such a chemical liquid sprayer 1, the chemical liquid in the chemical liquid tank 5 is sprayed from the nozzles 4a of the spraying booms 4 and 4 via the spraying pump 3 mounted on the airframe. Since the chemical solution is usually a solution obtained by diluting a chemical solution (agrochemical stock solution) with clean water, uniform stirring is required to prevent precipitation.
Conventionally, as an agitation device for agitating the chemical liquid in the chemical liquid tank 5, (1) mechanical agitation in which a stirring blade is provided at the bottom of the chemical liquid tank 5 and rotated by a motor or the like to generate a vortex and stir (2) A jet stirring method in which a part of the chemical liquid pressurized by the spray pump is returned to the inside of the chemical liquid tank 5 (usually near the bottom) and agitated by the jet. What is taken is adopted.
[0004]
[Problems to be solved by the invention]
However, in the case of using the mechanical stirring method of (1), particularly when the chemical tank is vertically long as described above, the bottom side where the stirring blades are located is well stirred when the water level is high. The upper side was not stirred so much, and when the water level was low, the amount of liquid was small, so that foaming occurred due to the stirring flow, which had a problem of adversely affecting the spraying pump and the like.
Even in the case where the jet stirring method is employed, particularly when the chemical tank is vertically long as described above, when the water level is high, the side (usually the bottom side) into which the chemical is jetted is well stirred. However, there was a problem that the stirring efficiency on the opposite side was poor.
[0005]
Therefore, the chemical solution can be introduced into both the bottom side and the top side of the chemical solution tank, and the injection position of the chemical solution can be manually switched according to the water level. By providing a channel switching means such as a cock and manually switching the channel switching means, when the water level is higher than a predetermined height, the chemical solution is jetted from the upper side, and the water level is lower than the predetermined height. If this is the case, a method of injecting and introducing the chemical solution from the bottom side is considered, but in this method, it is necessary to constantly monitor the water level of the chemical solution tank and to manually switch the flow path Therefore, it is difficult to say that the above-mentioned problem can be surely solved because the chemical spraying work is troublesome and the switching operation is forgotten.
[0006]
The present invention has been made in view of the conventional problems as described above, and its object is to require troublesome operations such as water level monitoring and manual channel switching under a relatively simple configuration. Therefore, it is possible to provide a chemical stirring device capable of efficiently and uniformly stirring the whole without causing foaming or the like regardless of whether the level of the chemical in the chemical tank is high or low. is there.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a chemical sprayer according to the present invention includes a chemical tank, a spray pump, and a part of the chemical liquid sucked and pressurized from the chemical tank by the spray pump . A chemical liquid agitating device that is jetted into and stirred by the jet flow , the chemical liquid agitating device includes a chemical liquid introduction channel that guides the chemical liquid from the spraying pump into the chemical liquid tank , An upper branch channel that branches from the chemical solution introduction channel and guides the chemical solution to a relatively high portion in the chemical solution tank; and a branch solution that branches from the chemical solution introduction channel to the relatively low portion in the chemical solution tank A flow rate adjusting means for automatically adjusting the flow rate of the chemical solution flowing through the upper branch flow channel and / or the lower branch flow channel according to the water level of the chemical solution in the chemical solution tank. There is disposed, before Chemical introducing passage is characterized in that it is intended to introduce a portion of the chemical liquid pressurized been sucked by the spraying pump from the chemical liquid tank.
[0008]
The flow rate adjusting means preferably opens the upper branch flow path when the water level is high, closes the lower branch flow path, and closes the upper branch flow path when the water level is low. And the lower branch flow path is opened.
In a more preferred aspect, the flow rate adjusting means includes a float that floats in the chemical solution in the chemical solution tank, and a chemical solution that flows through the upper branch flow channel and the lower branch flow channel in response to a change in the height position of the float. And valve means for adjusting the flow rate.
[0009]
In a more specific preferred embodiment, the flow rate adjusting means is arranged at a float floating in the chemical solution in the chemical solution tank, and at a branch portion of the upper branch flow channel and the lower branch flow channel with respect to the chemical solution introduction flow channel. And a link mechanism that converts the vertical movement of the float into a rotational movement of a rotating cock element built in the three-way cock.
In another preferred aspect of the chemical liquid stirring apparatus of the present invention, an upper jet nozzle is provided obliquely upward at the tip of the upper branch flow path, and a lower jet nozzle is provided at the tip of the lower branch flow path.
[0010]
The chemical liquid stirring device of the present invention is particularly suitable when the chemical liquid tank is of a vertically long type.
In a preferred aspect of the chemical sprayer equipped with the chemical liquid stirring device according to the present invention configured as described above, the height position of the float changes according to the water level of the chemical liquid in the chemical tank, and the position change of the float, That is, by using the buoyancy and gravity acting on the float, for example, the rotating cock element (valve element) of the three-way cock arranged at the branch portion of the three flow paths is rotated via the link mechanism. Thus, the flow rate of the chemical solution flowing through the upper branch flow path and the lower branch flow path is changed.
[0011]
In this case, when the water level is high (when it is equal to or higher than the predetermined height Hh), the upper branch flow path is opened by the rotating cock element, and the lower branch flow path is closed. The chemical liquid is jetted and introduced only from the upper branch flow path into the upper part of the chemical liquid tank, and the chemical liquid jet generated thereby propagates from the upper part to the lower part so that the entire chemical liquid in the chemical liquid tank including the bottom side is efficiently stirred. Is done.
[0012]
Further, when the water level is low (when it is equal to or lower than a predetermined height Hl), the upper branch flow path is closed and the lower branch flow path is opened by the rotating cock element. The chemical liquid is jetted and introduced into the lower part of the chemical liquid tank only from the lower branch flow path, and the chemical liquid jet (relatively small amount) in the chemical liquid tank is efficiently agitated without causing foaming or the like. .
[0013]
When the water level is between the predetermined height Hh and the low Hl, the chemical solution is distributed to the upper branch channel and the lower branch channel according to the water level by the three-way cock. The chemical liquid in the chemical liquid tank is efficiently introduced by the chemical liquid jets that are introduced from both the upper and lower parts of the chemical liquid tank and thereby generate two or more upper and lower parts (the number of the ejected parts can be increased to three or more). Stir well and uniformly.
[0014]
As described above, in the chemical liquid agitating device according to the present invention, the chemical liquid ejection introduction part (branch flow path) is provided above and below, and the chemical liquid is ejected through which branch flow path using the float or the like. Since it is automatically switched according to the water level of the chemical solution in the tank, the chemical solution can be monitored with a relatively simple configuration without requiring troublesome operations such as monitoring the water level and switching the manual flow path. Regardless of whether the water level of the chemical solution in the tank is high or low, the whole can be stirred efficiently and uniformly without causing foaming or the like.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a chemical sprayer according to the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of a chemical liquid agitating device for a chemical liquid sprayer according to the present invention together with a chemical liquid tank. The chemical liquid agitating device 10 of the illustrated embodiment is attached to the vertically long chemical liquid tank 5 in the chemical liquid sprayer 1 as shown in FIG. 5, and the chemical liquid M is injected into the chemical liquid tank 5 to be introduced. A jet stirring method is used in which stirring is performed by a jet.
The chemical liquid agitating device 10 ejects a part of the chemical liquid sucked and pressurized by a spraying pump 3 (see FIG. 5) such as a high-pressure plunger pump to the upper part and / or the lower part of the chemical liquid tank 5. Accordingly, a chemical solution introduction channel 11 and an upper branch channel 12 and a lower branch channel 13 that branch from the chemical solution introduction channel 11 in two directions are provided.
[0016]
The chemical solution introduction channel 11 includes an outer conduit 15, a joint 16, and an inner conduit 17 that are horizontally disposed in the vicinity of the bottom portion 5 b of the peripheral side portion 5 a in the chemical solution tank 5. The channel 12 is connected to a tip 22 (downstream end) of the chemical solution introduction channel 11 via a three-way cock 30 as a valve means that constitutes a flow rate adjusting means. A joint 23 and an upper jet nozzle 25 connected obliquely upward to the joint 23, and the lower branch passage 13 is connected to an elbow 24 connected to the lower side of the three-way cock 30 and the elbow 24. It consists of a lower jet nozzle 26 connected sideways (horizontal).
[0017]
As can be understood with reference to FIGS. 3 and 4, the three-way cock 30 is a schematic cross-sectional view that is freely loosely fitted in a case main body 30 </ b> A and a cylindrical valve chamber 34 formed in the case main body 30 </ b> A. A crescent-shaped rotating cock element 35, and the valve chamber 34 has an inlet 31 in which the tip of the inner conduit 17 of the chemical solution introduction channel 11 is screwed and connected, and is orthogonal to the inlet 31. And an upper outlet 32 where the lower end of the connection conduit 22 of the upper branch flow path 12 is screwed and connected, and an upper end of the elbow 24 of the lower branch flow path 13 is screwed and connected. The lower outlet 33 is opened, and the upper outlet 32 and the lower outlet 33 are opened and closed by the rotating cock element 35.
[0018]
That is, when the rotation cock element 35 is in the lowest rotation position as shown in FIG. 3, the lower outlet 33 is closed and the lower branch flow path 13 is closed, When the upper outlet 32 is opened to open the upper branch flow path 12 and the rotary cock element 35 is in the uppermost rotational position as shown in FIG. 4, the upper outlet 32 is closed. The upper branch flow path 12 is closed, the lower outlet 33 is opened, and the lower branch flow path 13 is opened, and the lowermost rotation position and the uppermost rotation position are When in the middle, both the upper outlet 32 and the lower outlet 33 are partially opened according to the rotation angle.
[0019]
In the present embodiment, the float 50 is floated in the chemical solution M in the chemical solution tank 5 in order to rotate the rotating cock element 35 according to the water level H of the chemical solution M in the chemical solution tank 5. It has been.
The float 50 includes a leg-shaped lever 41 connected and fixed to the rotating cock element 35, a cylindrical link rod 42 rotatably connected to the lever 41, and a lower portion on the cylindrical link rod 42. Is connected to the rotating cock element 35 via a link mechanism 40 including a length adjusting link rod 43 and the like inserted and fixed. The cylindrical link rod 42 part is inserted through a guide member 45 attached to the connection conduit 22, and the float 50 is substantially aligned with the water level H (the height position of the liquid level S) of the chemical solution M. It moves up and down in the vertical direction.
[0020]
In the chemical solution agitator 10 of the present embodiment configured as described above, the height position of the float 50 changes according to the water level H of the chemical solution M in the chemical solution tank 5, and the position change of the float 50, that is, the Using the buoyancy and gravity acting on the float 50, the rotating cock element 35 of the three-way cock 30 disposed at the branch portion of the three flow paths 11, 12, 13 is rotated via the link mechanism 40. Accordingly, the flow path is switched, that is, the flow rate of the chemical M flowing through the upper branch flow path 12 and the lower branch flow path 13 is changed.
[0021]
Note that the three-way cock 30 needs to rotate the rotating cock element 35 with only a buoyancy and gravity acting on the float 50 as described above, in other words, with a relatively small torque. The moving cock element 35 is inserted into the valve chamber 34 with a certain amount of play, and packing and sealing materials are omitted. Therefore, liquid leakage, short circuit, etc. occur between the three flow paths 11, 12, 13; however, even if some liquid leakage, short circuit, etc. occur, any of them will be introduced into the chemical liquid tank 5, so It doesn't matter.
[0022]
Next, operation | movement and an effect | action of the chemical | medical solution stirring apparatus 10 of this embodiment are demonstrated.
First, as shown in FIG. 1, when the water level H of the chemical liquid M in the chemical liquid tank 5 is higher than a predetermined upper liquid level height Hh, the float 50 floats to the highest position. The moving cock element 35 takes the lowest rotation position as shown in FIG. 3, the lower outlet 33 is closed, the lower branch passage 13 is closed, and the upper outlet 32 is The upper branch flow path 12 is opened, and the chemical M is jetted and introduced into the upper part of the chemical tank 5 obliquely upward only from the upper jet nozzle 25 of the upper branch flow path 12. As the jet is generated, the chemical jet is propagated downward from the top, and the entire chemical M in the chemical tank 5 including the bottom 5b side is efficiently and uniformly agitated.
[0023]
Further, as shown in FIG. 2, when the water level H of the chemical liquid M in the chemical liquid tank 5 is lower than a predetermined lower liquid level height Hl, the float 50 is lowered to the lowest position by its own weight, and the rotating cock The element 35 closes the upper outlet 32 and closes the upper branch passage 12, and opens the lower outlet 33 to open the lower branch passage 13. Only the lower jet nozzle 26 of the branch flow path 13 is introduced into the lower part of the chemical liquid tank 5 in a substantially horizontal direction, thereby generating a chemical liquid jet, and the chemical liquid M in the chemical liquid tank 5 is bubbled by the chemical liquid jet. And the like are efficiently and uniformly stirred. In such a case, since the amount of the chemical liquid M is small, the diameter of the lower jet nozzle 26 may be made smaller than that of the upper jet nozzle 25 to reduce the amount of the ejected chemical liquid.
[0024]
Further, when the water level H is between the predetermined height high Hh (FIG. 1) and low Hl (FIG. 2), the chemical solution M is moved upward by the three-way cock 30 according to the water level H at that time. The chemical liquid in the chemical liquid tank 5 is divided into the branch flow path 12 and the lower branch flow path 13 and is jetted and introduced into both the upper part and the lower part of the chemical liquid tank 5. Is efficiently and uniformly stirred.
[0025]
As described above, in the chemical stirring apparatus 10 according to the present embodiment, the injection introduction part (branch flow path 12, 13) of the chemical liquid M is provided up and down, and through which branch flow path 12, 13 the chemical liquid M is jetted. Since the float 50 and the link mechanism 40 are used to automatically switch according to the water level of the chemical liquid M in the chemical liquid tank 5, the water level can be monitored and manually controlled with a relatively simple configuration. Without requiring troublesome operations such as channel switching, the whole can be efficiently and uniformly agitated without causing foaming or the like, regardless of the level of the chemical liquid in the chemical tank.
[0026]
In addition, since the structure is simple, there are few failures and maintenance is easy. Furthermore, by changing the length of the upper branch flow path 12 (connection conduit 22), a chemical solution tank having an arbitrary height can be obtained. In this case, the same stirring performance can be obtained.
Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various designs can be used without departing from the spirit of the invention described in the claims. Can be changed.
[0027]
That is, in the embodiment, as the flow rate adjusting means, a three-way cock 30 is disposed at a branch portion of the upper branch flow path 12 and the lower branch flow path 13 with respect to the chemical solution introduction flow path 11. Although the rotation cock element 35 is rotated by the float 50 via the link mechanism 40, the device of the present invention is not limited to such a configuration. For example, the lower branch flow path 13 is always provided. The upper branch flow path 12 may be provided with a rotary valve, a butterfly valve, and the like, and may be rotated or opened / closed by a float and link mechanism or other water level responsive means.
Moreover, in the said embodiment, although the chemical | medical solution ejection introduction part (jet nozzles 25 and 26) is only two places up and down, this may be provided in three or more places, and you may make it switch a chemical | medical solution ejection introduction position in multiple steps.
[0028]
【The invention's effect】
As can be understood from the above description, the chemical liquid agitator of the chemical liquid sprayer according to the present invention is provided with a chemical liquid ejection introduction part (branch channel) at the top and bottom, through which branch channel the chemical liquid is ejected. Since it is automatically switched according to the water level of the chemical liquid in the chemical tank using a float or the like, it is troublesome to monitor the water level or switch the manual flow path with a relatively simple configuration. Even if the level of the chemical solution in the chemical solution tank is high or low, no operation is required, and the whole can be efficiently and uniformly agitated without causing foaming. In addition, since the structure is simple, there are few failures, maintenance is easy, and it can be applied to chemical tanks of any height by simply changing the length of the upper branch flow path. The stirring performance of can be obtained.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of a chemical stirring apparatus according to the present invention together with a chemical tank in a high water level state.
FIG. 2 is a view showing an embodiment of a chemical liquid stirring device according to the present invention together with a chemical liquid tank in a low water level state.
3 is an enlarged cross-sectional view of a three-way cock portion in the chemical liquid stirring device shown in FIG.
4 is an enlarged cross-sectional view of a three-way cock portion in the chemical liquid stirring device shown in FIG.
FIG. 5 is a perspective view showing a chemical sprayer suitable for applying the chemical stirring device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Chemical liquid sprayer 5 Chemical liquid tank 10 Chemical liquid stirring apparatus 11 Chemical liquid introduction flow path 12 Upper branch flow path 13 Lower branch flow path 25 Upper jet nozzle 26 Lower jet nozzle 30 Three-way cock (flow control means, valve means)
35 Rotating cock element 40 Link mechanism (flow rate adjusting means)
50 float (flow control means)
M Chemical solution H Water level Hh Predetermined height (high water level)
Hl predetermined height (low water level)

Claims (6)

A chemical liquid tank (5), a spray pump (3), and a part of the chemical liquid (M) sucked and pressurized from the chemical liquid tank (5) by the spray pump (3) 5) a chemical liquid sprayer provided with a chemical liquid stirring device (10) which is jetted into the liquid and stirred by the jet flow;
The chemical liquid stirring device (10) includes a chemical liquid introduction channel (11) for guiding the chemical liquid (M ) from the spray pump (3) into the chemical liquid tank (5), and the chemical liquid introduction channel (11). The chemical liquid (M) is branched from the chemical liquid introduction flow path (11) and branched from the upper branch flow path (12) for branching the chemical liquid (M) to a relatively high part in the chemical liquid tank (5). A lower branch channel (13) that leads to a relatively low part in the chemical tank (5), and flows through the upper branch channel (12) and / or the lower branch channel (13). wherein the chemical flow chemical tank (5) in the chemical water level (M) flow rate adjusting means for automatically adjusting according to (H) (30, 40, 50) is arranged chemical sprayer, characterized in Rukoto . When the water level (H) is equal to or higher than a predetermined height (Hh), the flow rate adjusting means (30, 40, 50) opens the upper branch flow path (12) and the lower branch flow path ( 13) is closed, and when the water level (H) is below a predetermined height (Hl), the upper branch flow path (12) is closed and the lower branch flow path (13) is opened. The chemical sprayer according to claim 1, wherein the chemical sprayer is used . The flow rate adjusting means is floated in the chemical liquid (M) in the chemical liquid tank (5), and the upper branch channel (12) in response to a change in the height position of the float (50). ) and chemical sprayer according to claim 1, characterized in that the lower branch flow path (13) valve means (30 to adjust the drug solution flow rate through the) consists. The flow rate adjusting means includes a float (50) floating in the chemical liquid (M) in the chemical liquid tank (5), the upper branch flow path (12) and the lower branch flow with respect to the chemical liquid introduction flow path (11). The vertical movement of the three-way cock (30) and the float (50) disposed at the branch portion of the path (13) is converted into the rotational movement of the rotating cock element (35) built in the three-way cock (30). The chemical sprayer according to any one of claims 1 to 3, further comprising: a link mechanism (40) that performs the above-described operation. An upper jet nozzle (25) is provided obliquely upward at the tip of the upper branch channel (12), and a lower jet nozzle (26) is provided at the tip of the lower branch channel (13). The chemical sprayer according to any one of claims 1 to 4. The chemical liquid sprayer according to any one of claims 1 to 5, wherein the chemical liquid tank (5) is of a vertically long type.

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