JP2020188708A - Liquid tank device - Google Patents

Abstract

To provide a liquid tank device capable of suppressing movement of liquid in a vertical direction.SOLUTION: A liquid tank device 1 includes a liquid tank 2 for storing liquid injected from an inlet 22, and a planar net-like body 9 arranged in an inside space S of the liquid tank 2. The net-like body 9 is arranged in the state in which a plane crosses a vertical direction of the liquid tank 2 in the inside space S.SELECTED DRAWING: Figure 3

Description

The present invention relates to a liquid tank device.

The liquid tank device disclosed in Patent Document 1 includes a liquid tank for storing a liquid and a strainer attached to an inlet of the liquid tank. At the bottom of the strainer, a plate-like body extending downward is provided. The plate-shaped bodies are arranged so as to intersect substantially right angles with respect to the liquid level of the liquid stored in the liquid tank, for example. Therefore, when the liquid sways back and forth and left and right, the movement of the liquid can be restricted by the plate-like body (so-called wave-dissipating effect).

Japanese Unexamined Patent Publication No. 2006-741

However, in the liquid tank device described in Patent Document 1, the plate-shaped body is provided in the lower part of the strainer, and the area where the plate-shaped body is arranged is smaller than the liquid injection port when viewed from the vertical direction. It was. Therefore, the wave-dissipating effect in the vertical direction tends to be smaller than that in the horizontal direction.

An object of the present invention is to provide a liquid tank device capable of suppressing the movement of a liquid in the vertical direction.

The liquid tank device (1) according to the present invention has a liquid tank (2) for storing the liquid injected from the injection port (22) and a flat net-like structure arranged in the inner space (S) of the liquid tank (2). The body (9) and the reticulated body (9) are arranged in the inner space (S) in a state where the planes intersect with each other in the vertical direction of the liquid tank (2).

According to such a liquid tank device (1), in the inner space (S) of the liquid tank (2), the arranged reticulated body (9) can come into contact with the stored liquid. The planes of the reticulated body (9) are arranged so as to intersect with each other in the vertical direction. Therefore, when the liquid moves in the vertical direction in response to the shaking of the liquid tank (2), the reticulated body (9) gives resistance to the flow of the liquid, and the flow of the liquid is suppressed.

The liquid tank (2) may have a regulating means for restricting the vertical movement of the reticulated body (9) in the inner space (S). In this configuration, the movement of the liquid in the vertical direction suppresses the movement of the position of the reticulated body (9) in the vertical direction.

The regulating means includes a recess (25) formed on the inner surface of the liquid tank (2), and the net-like body (9) is restricted from moving in the vertical direction by being engaged with the recess (25). You can. In this configuration, the liquid tank (2) having the regulating means (25) can be formed by a simple method of forming a recess (25) on the inner surface of the liquid tank (2).

The inlet (22) is formed in the upper part of the liquid tank (2), and the reticulated body (9) has a larger area than the inlet (22) when viewed from above and below. Good. In this configuration, the area of the net-like body (9) arranged in the liquid tank (2) can be increased. As a result, the movement of the liquid can be effectively suppressed. For example, the reticulated body (9) may have an area similar to the cross-sectional area of the liquid tank (2) at the height position where the reticulated body (9) is provided when viewed from the vertical direction.

The reticulated body (9) may be able to pass through the injection port (22) in an elastically deformed state. In this configuration, the reticulated body (9) having a large area can be easily arranged in the inner space (S) of the liquid tank (2).

The liquid tank device (1) may further include a strainer (5) attached to the inlet (22), and the reticulum (9) may be located below the strainer (5). In this configuration, the wave-dissipating effect of the reticulated body (9) continues even after the water level in the liquid tank (2) drops below the lower end of the strainer (5).

According to the present invention, it is possible to provide a liquid tank device capable of suppressing the movement of a liquid in the vertical direction.

It is a perspective view which shows an example liquid tank apparatus. It is a top view which shows an example liquid tank apparatus. It is sectional drawing which shows the liquid tank device cut along the vertical direction.

Hereinafter, embodiments according to the present invention will be specifically described with reference to the drawings. For convenience, substantially the same elements may be designated by the same reference numerals and the description thereof may be omitted.

FIG. 1 is a perspective view showing the liquid tank device 1. FIG. 2 is a plan view showing the liquid tank device 1. FIG. 3 is a cross-sectional perspective view showing the liquid tank device 1 cut along the vertical direction. In the present embodiment, the liquid tank device 1 can be applied to a so-called backpack type power sprayer for spraying a liquid such as a pesticide. For example, the liquid tank device 1 may be provided with a backpack band for the operator to carry the liquid tank device 1 on his back. In the following, the liquid tank device 1 applied to the backpack type power sprayer will be described, and the worker side (the side indicated by the arrow in the Y direction in the drawing) in the state where the worker carries the power sprayer is the front side. The front-back direction is specified as. Thereby, the horizontal direction (X direction) that intersects (orthogonal) in the front-rear direction is defined as the left-right direction, and the direction that intersects (orthogonal) in the front-rear direction and the horizontal direction is defined as the vertical direction (Z direction).

The liquid tank device 1 includes a liquid tank 2, a strainer 5, and a reticulated body 9. The liquid tank 2 can store a liquid such as a chemical solution in the inner space S. The lower portion of the liquid tank 2 has a shape that is recessed toward the inside of the liquid tank 2. A pump and a motor constituting a power source may be arranged in this recess so as to be fixed to the liquid tank 2. When the liquid tank 2 is applied to a backpack type power sprayer, the chemical solution is sucked from the liquid tank 2 by the drive of the pump, pumped to the spray hose, and the chemical solution can be sprayed from the spray nozzle. In the illustrated example, the pump, motor, spray hose, spray nozzle, etc. are not drawn.

The liquid tank 2 is formed of, for example, a translucent synthetic resin, and the amount of liquid stored in the inner space S can be visually recognized from the outside. As an example, the liquid tank 2 can be formed by blow molding. An injection port 22 for injecting a liquid into the inner space S of the liquid tank 2 is formed in the upper part of the liquid tank 2. A tank lid (not shown) can be detachably attached to the outer peripheral surface of the cylindrical portion 22a forming the injection port 22 by, for example, a screw or the like. Further, a step portion 22b protruding inward in the radial direction is provided on the inner circumference of the cylindrical portion 22a.

A support portion 23 is formed at a central position in the vertical direction of the liquid tank 2. The support portion 23 is a portion where the work wearer touches the liquid tank 2 when supporting the liquid tank 2. The support portion 23 of the illustrated example is formed on the outer peripheral surface of the liquid tank 2. The support portion 23 has a shape that is recessed toward the inside of the liquid tank 2.

Further, on the inner surface that defines the inner space S of the liquid tank 2, a recess 25 having a shape recessed toward the outside of the liquid tank 2 is formed at a position at the center of the liquid tank 2 in the vertical direction. In the illustrated example, the recess 25 is formed below the center of the liquid tank 2 in the vertical direction and above the position 1/4 from the lower end in the vertical direction. The concave portion 25 forms a convex portion 26 projecting outward on the outer surface of the liquid tank 2. The recesses 25 are the rear portion of the liquid tank 2, and are formed in pairs at both ends of the liquid tank 2 in the left-right direction.

The strainer 5 includes a substantially cylindrical tubular portion 6 inserted into the injection port 22, a filtration portion 7 provided at the lower end of the tubular portion 6, and a resistance portion 8 provided at the lower portion of the filtration portion 7. , Is equipped. The tubular portion 6, the filtration portion 7, and the resistance portion 8 are integrally molded with, for example, a synthetic resin.

The tubular portion 6 is divided into three portions from the upper side, an upper portion 61, an intermediate portion 63, and a lower portion 65, along the axial direction thereof. The outer diameter of the upper portion 61 is larger than the outer diameter of the intermediate portion 63, and the outer diameter of the lower portion 65 is smaller than the outer diameter of the intermediate portion 63. More specifically, the outer diameter of the intermediate portion 63 is smaller than the diameter of the circle defined by the inner edge of the step portion 22b formed in the injection port 22. The outer diameter of the upper portion 61 is smaller than the outer diameter of the open end of the injection port 22 and larger than the diameter of the circle. Therefore, when the tubular portion 6 is inserted into the injection port 22 from the lower portion 65 side, the lower portion 65 and the intermediate portion 63 pass through the region surrounded by the step portion 22b, but the step 64 between the intermediate portion 63 and the upper portion 61 is formed. It is placed on the step portion 22b, and the tubular portion 6 is held in the injection port 22. In this state, since the upper end of the tubular portion 6 is open, it is possible to inject the liquid into the tubular portion 6 from there and filter the foreign matter contained in the liquid at the filtration portion 7.

The filtration portion 7 is a portion for removing foreign matter from the liquid that has passed through the tubular portion 6 and filtering the liquid. The filtration portion 7 has a plurality of bone members 71 (six in the illustrated embodiment) provided so as to evenly partition the lower end surface of the tubular portion 6 in the circumferential direction. The plurality of bone members 71 are connected to each other at the central position of the filtration portion 7. That is, these bone members 71 extend radially from the center of the filtration portion 7. The filtration portion 7 is divided into a plurality of fan-shaped openings 73 by a bone member 71. The fan-shaped opening 73 is provided with a mesh (not shown) that captures foreign matter contained in the liquid injected into the liquid tank 2.

The resistance portion 8 gives resistance to the liquid stored in the liquid tank 2. The resistance portions 8 in the present embodiment include a shaft core 81 extending downward coaxially with the tubular portion 6 from the central position of the filtration portion 7, and a plurality of resistance portions 8 extending radially from the shaft core 81 (six in the illustrated embodiment). It is provided with a substantially rectangular plate-shaped body 83. The plate-shaped bodies 83 are evenly arranged in the circumferential direction and are connected to the corresponding bone members 71. Further, the outer edge portion 84 of each plate-shaped body 83 extends upward to the step 64 between the intermediate portion 63 and the lower portion 65, and is connected to the outer peripheral surface of the lower portion 65 of the tubular portion 6.

The length (horizontal dimension) from the central axis of the shaft core 81 to the outer edge portion 84 may be, for example, equal to or less than the radius of the outer peripheral surface of the intermediate portion 63 in the tubular portion 6. Further, the height of the resistance portion 8 (vertical dimension of the plate-shaped body 83) is such that at least a part of the resistance portion 8 becomes a certain amount of liquid in the liquid tank 2 when the strainer 5 is attached to the injection port 22. It is a size that can be immersed. In the illustrated example, the resistance portion 8 extends to a position below the center of the liquid tank 2 and above the recess 25.

The reticulated body 9 is arranged in the inner space S of the liquid tank 2, and can attenuate the wave of the liquid (sway of the liquid surface) stored in the liquid tank 2. In the present embodiment, the net-like body 9 includes a net portion 91 extending in a plane shape in which pore-shaped portions through which a liquid passes are regularly arranged. As an example, the net unit 91 can be formed by intersecting a plurality of resin wires or metal wires at right angles with a plain weave, a twill weave, or the like. For example, the mesh size of the net unit 91 may be about 1 to 20 mm. The outer edge of the net unit 91 may be supported by the frame-shaped support unit 93. The wire diameter of the reticulated body 9 is such that the reticulated body 9 can be elastically deformed, and may be, for example, about 1 to 5 mm. In the present embodiment, the reticulated body 9 can pass through the injection port 22 in an elastically deformed state.

The reticulated body 9 is arranged in the inner space S of the liquid tank 2 in a state of intersecting the vertical direction of the liquid tank 2. In the illustrated example, the planes of the net-like body 9 along the net portion 91 are orthogonal (intersect) in the vertical direction of the liquid tank 2. That is, the net-like body 9 is arranged in the inner space S of the liquid tank 2 so that the plane along the net portion 91 is horizontal.

In the present embodiment, the reticulated body 9 is engaged with the recess 25 of the liquid tank 2. That is, the left and right ends on the rear side of the horizontally arranged net-like body 9 are located in the groove formed by the recess 25. Therefore, the vertical movement of the net-like body 9 in the inner space S is regulated by the recess 25.

The reticulated body 9 has a larger area than the injection port 22 when viewed from above and below. For example, the net-like body 9 has substantially the same shape as the cross-sectional area of the liquid tank 2 at the height position where the net-like body 9 is provided when viewed from the vertical direction, and has the same area. In the present embodiment, the height position where the net-like body 9 is provided is the height position of the recess 25 in the liquid tank 2.

In the present embodiment, as described above, the reticulated body 9 can be elastically deformed. When the network body 9 is arranged in the inner space S of the liquid tank 2, the network body 9 is pushed into the inner space S of the liquid tank 2 through the injection port 22 in a state of being elastically deformed by a manufacturer, an operator, or the like. Is done. Then, when the force applied to the reticulated body 9 is released, the reticulated body 9 is restored to be flat in the inner space S of the liquid tank 2. For example, when the reticulated body 9 is restored, the reticulated body 9 is arranged at a predetermined position in the inner space S of the liquid tank 2 by engaging the outer edge (support portion 93) of the reticulated body 9 with the recess 25. In the present embodiment, the reticulated body 9 is arranged below the strainer 5 in the vertical direction.

When the liquid tank device 1 described above is used, in a state where the net-like body 9 is arranged in the inner space S of the liquid tank 2, a predetermined amount of concentrated chemical solution is injected from the injection port 22 before mounting the strainer 5. throw into. After the charging of the concentrated chemical solution is completed, the strainer 5 is attached to the injection port 22 of the liquid tank 2. When the strainer 5 is attached, the strainer 5 is inserted into the injection port 22 in the order of the resistance portion 8, the filtration portion 7, and the tubular portion 6.

When the strainer 5 is attached to the injection port 22 in this way, water for diluting the concentrated drug solution to a predetermined concentration is injected from the open end of the strainer 5. The amount of water to be injected is confirmed by looking at the liquid level from the outside of the translucent liquid tank 2 and comparing it with the scale or the like engraved on the liquid tank 2. For example, water is injected so that the water level is such that at least a part (lower side) of the plate-shaped body 83 is immersed. In this case, the reticulated body 9 is completely immersed. Further, the foreign matter contained in the water is captured by the filtration portion 7 of the strainer 5 to prevent the foreign matter from being mixed into the liquid tank 2. After the water has been injected into the liquid tank 2, the tank lid is attached to the injection port 22. As a result, the worker can start work with, for example, a backpack type power sprayer.

When performing such work, since the backpack type power sprayer is used by being carried on the back of the worker, the liquid tank 2 sways irregularly as the worker walks, and the chemical solution in the liquid tank 2 becomes used. Rippling is likely to occur. However, according to the liquid tank device 1, the network 9 is immersed in the stored liquid in the inner space S of the liquid tank 2. The planes of the net-like body 9 are arranged so as to intersect with each other in the vertical direction. Therefore, the reticulated body 9 gives resistance to the vertical flow of the liquid, and the flow of the liquid is suppressed. Further, the plate-shaped body 83 is immersed in the liquid in a state where it intersects in the horizontal direction. Therefore, the plate-like body 83 gives resistance to the horizontal flow of the liquid, and the flow of the liquid is suppressed.

Further, the reticulated body 9 is restricted from moving in the vertical direction in the inner space S of the liquid tank 2. In this case, the position of the reticulated body 9 is suppressed from moving due to the force of the liquid moving in the vertical direction. Therefore, the reticulum 9 can provide greater resistance to the liquid.

In the present embodiment, the vertical movement of the reticulated body 9 is regulated by being engaged with the recess 25. In this configuration, the liquid tank 2 having the regulating means can be formed by a simple method of forming the recess 25 on the inner surface of the liquid tank 2.

The injection port 22 is formed in the upper part of the liquid tank 2, and the network body 9 has a larger area than the injection port 22 when viewed from above and below. In particular, in the present embodiment, the reticulated body 9 has an area similar to the cross-sectional area of the liquid tank 2 at the position of the recess 25 when viewed from the vertical direction. In this configuration, since the area of the net-like body 9 arranged in the liquid tank 2 is large, the movement of the liquid can be suppressed more effectively.

Further, since the net-like body 9 can pass through the injection port 22 in an elastically deformed state, the net-like body 9 having a large area can be easily arranged in the inner space S of the liquid tank 2.

Further, the net-like body 9 is arranged below the strainer 5 in the vertical direction. Therefore, the wave-dissipating effect of the reticulated body 9 is maintained even after the water level in the liquid tank 2 drops below the lower end of the strainer 5 with the progress of the spraying work.

Although one embodiment has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment.

For example, as a means for regulating the vertical position of the net-like body, a recess 25 formed in the liquid tank is shown, but the means for regulating the position is not limited to this. For example, when the shape of the liquid tank is reduced in diameter from the lower side to the upper side, a support portion (for example, a protrusion) for supporting the net-like body may be provided on the inner surface of the liquid tank. According to this, the movement of the reticulum downward is suppressed by the support portion. Further, the movement of the reticulum upward can be suppressed by the reticulum coming into contact with the inner surface of the liquid tank. Further, when the reticulum is formed of a resin having a specific gravity smaller than that of water, the reticulum may float in the stored liquid instead of being fixed in the liquid tank. Even in this case, the reticulum can function by resisting the liquid.

Further, in the above embodiment, an example in which the liquid tank device is applied to the backpack type power sprayer is described, but the liquid tank device can be applied to all the backpack type work machines provided with the liquid tank, and is a traction type. , Crawler type, can also be applied to vehicles that run on front and rear wheels and have a liquid tank.

Further, although an example in which the net unit is formed by plain weave or twill weave is shown, the net unit may have a shape in which a hole-shaped portion having a predetermined size is formed. Therefore, the reticulated body may be formed by, for example, integral molding with a synthetic resin.

Further, in the liquid tank, an example is shown in which the net-like bodies are arranged so that the flat portions are orthogonal to each other in the vertical direction, but the net-like bodies are arranged so as to intersect in the vertical direction at an arbitrary angle. May be done. Even in this case, since the liquid moving in the vertical direction passes through the holes of the reticulated body, the reticulated body can provide resistance to the flow of the liquid.

1 ... Liquid tank device, 2 ... Liquid tank, 5 ... Strainer, 9 ... Reticulated body, 22 ... Injection port, 25 ... Recess (regulatory means), S ... Inner space.

Claims (7)

A liquid tank (2) that stores the liquid injected from the inlet (22), and
A flat net-like body (9) arranged in the inner space (S) of the liquid tank (2) is provided.
The liquid tank device (9) is arranged in the inner space (S) with planes intersecting the vertical direction of the liquid tank (2). The liquid tank device according to claim 1, wherein the liquid tank (2) has a regulating means for restricting the vertical movement of the network body (9) in the inner space (S). The regulatory means includes a recess (25) formed on the inner surface of the liquid tank (2).
The liquid tank device according to claim 2, wherein the reticulated body (9) is restricted from moving in the vertical direction by being engaged with the recess (25). The injection port (22) is formed in the upper part of the liquid tank (2).
The liquid tank device according to any one of claims 1 to 3, wherein the reticulated body (9) has a larger area than the injection port (22) when viewed from above and below. The liquid tank device according to claim 4, wherein the reticulated body (9) can pass through the injection port (22) in an elastically deformed state. Claims 1 to that the net-like body (9) has an area equivalent to the cross-sectional area of the liquid tank (2) at a height position where the net-like body (9) is provided when viewed from the vertical direction. 5. The liquid tank device according to any one of 5. Further provided with a strainer (5) attached to the inlet (22)
The liquid tank device according to any one of claims 1 to 6, wherein the reticulated body (9) is arranged below the strainer (5).

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