JP3097404U - Manual valve - Google Patents

Abstract

To provide a manual valve with a flow rate adjusting function for preventing a change in supply amount due to a change in supply pressure of a chemical solution during a pesticide spraying operation.
A liquid supply hose (4) can be connected to one end of a cylindrical main body grip (1) having a through flow path (7) so as to communicate with the through flow path. A liquid discharge pipe can be connected so as to communicate with it, and a valve for opening and closing a through flow passage of a grip portion and a lever 17 for opening and closing this valve are provided. 22 are provided.
[Selection diagram] Fig. 1

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a manual valve having a flow rate control function, and more particularly to a manual valve which can be easily used by an operator to easily control the flow rate at hand, and which can be suitably used in a device for spraying an agent for suppressing the side buds of leaf tobacco.
[0002]
[Prior art]
In tobacco cultivation, the tip flower portion of the stem is removed before flowering in order to ensure that nutrients are sufficiently supplied to the harvested leaves. Immediately after that, shoots emerge from the roots of the leaves. Since the buds consume nutrients, the bud suppressant is sprayed. If an excessive amount of this type of inhibitor is used, it is harmful to plants, and if it adheres to leaves, the taste of tobacco will be degraded.
[0003]
Conventionally, a constant amount of medicine is supplied by opening a manual valve provided between a medicine supply source and a spray nozzle for a predetermined time, or by providing an electromagnetic valve and opening it for a predetermined time by a timer. However, in any case, when the pressure of the pump for supplying the chemical liquid fluctuates during the spraying operation, there is a disadvantage that the spraying amount once set fluctuates and effective spraying cannot be performed. Further, since the adjustment of the pump pressure is greatly affected by the performance of the pump, there is a disadvantage that it takes time to adjust the setting of the amount and the degree of application of the medicine by the adjustment.
[0004]
[Patent Document 1]
JP-A-2002-361138
[0005]
[Patent Document 2]
Patent No. 3068019 [0006]
[Problems to be solved by the invention]
In the present invention, the setting of the amount and degree of spraying of the medicine from the spraying nozzle, and the adjustment of the amount and degree of spraying of the medicine which fluctuate due to the fluctuation of the pump pressure during the spraying operation, are frequently performed by adjusting the pressure regulating valve of the pump. An object of the present invention is to enable fine adjustment while checking a spraying state without performing operation adjustment.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides that a liquid supply hose to be communicated with the through flow passage can be connected to one end of a cylindrical main body grip portion having a through flow passage, and the other end of the grip portion is connected to the other end of the grip portion. Is provided with an opening / closing valve for the through flow passage of the grip portion and a manual operation lever for opening and closing the valve, in which a liquid discharge pipe can be connected to communicate with the through flow passage. Is provided.
[0008]
[Embodiment of the invention]
A part of the other end of the grip portion is constituted by a flow passage opening / closing fitting, and a part of the through flow passage is formed by a water passage penetrating through the fitting, and the opening / closing valve of the through flow passage is formed in the water passage. Can be provided. The valve seat of the on-off valve is provided in the water passage, the valve body is constantly pressed against the valve seat to close the valve, and the valve rod is protruded outwardly from the channel opening / closing fitting. An engaging portion is provided at an end, and one end of an operation lever supported by a fulcrum provided outside the flow path opening / closing portion bracket or the grip portion is engaged with an engaging end of the valve stem, and a fulcrum of the operation lever is provided. The extended portion is extended along the axial direction outside the grip so that the operator can operate the operation lever with the hand of the operator holding the grip.
[0009]
A discharge pipe communicating with the water passage is connected to a tip of the channel opening / closing part fitting by, for example, a screw, and a spray nozzle can be provided at a tip of the discharge pipe. A hose is connected to the rear end of the grip portion by, for example, a screw, and the hose is connected to a liquid supply source such as a chemical solution via a pump.
[0010]
The flow rate adjusting valve may be constituted by a needle valve provided in the flow passage opening / closing fitting in the water passage upstream or downstream of the opening / closing valve. That is, a cylindrical cross hole having substantially the same diameter or a slightly larger diameter as the water passage is formed in the flow passage opening / closing member from the outer surface thereof toward the water passage, and the cylindrical cross hole is formed in the water passage. Is formed to extend slightly orthogonally across the cross-section, a valve stem having a tip portion forming a needle valve is inserted into the transverse hole, and the male thread portion formed on the valve stem is inserted into the female thread portion formed on the transverse hole. A screw is provided, and a knob is provided at a protruding end where the valve stem projects outside the channel opening / closing part fitting, and the valve stem is rotated to change the length of entry of the needle valve into the water passage. To adjust the flow rate.
[0011]
【Example】
Embodiments will be described with reference to the drawings. 1 is a cylindrical grip portion, 2 is a chemical liquid passage opening / closing metal fitting connected to one end (tip) of the grip portion 1, 3 is a hose connection metal fitting connected to the other end (rear end) of the grip portion, 4 is a chemical liquid supply. The hose 5 is connected to the connection fitting 3 with a hose fitting. Reference numeral 6 denotes a strainer provided in the through flow path 7 in the grip portion 1, reference numeral 8 denotes a water passage formed through the chemical liquid flow path opening / closing metal fitting 2, and one end (rear end) thereof communicates with the grip portion internal flow path 7; The end (tip) communicates with the discharge pipe 18 (FIG. 3) screwed to the screw 9. Reference numeral 10 denotes a valve mechanism for opening and closing the water passage 8 provided in the middle of the water passage 8, reference numeral 11 denotes a valve seat thereof, reference numeral 12 denotes a valve body, and reference numeral 13 denotes a valve body 12 which is constantly elastically pressed against the valve seat 11 to close the valve. A spring to be applied, 14 is a valve stem, 15 is an engaging portion provided at a protruding end of the valve stem 14 protruding outward from the channel opening / closing member 2, 16 is an outside of the channel opening / closing member 2 or the grip portion 1. Reference numeral 17 denotes an operating lever supported by a fulcrum 16. One end of the operating lever is engaged with the engaging portion 15 of the valve rod 14, and an extended portion of the operating lever 17 beyond the fulcrum 16 is provided outside the grip portion 1. So that the operator can operate the operation lever 17 with the hand of the operator holding the grip portion 1.
[0012]
Reference numeral 19 denotes a chemical spray nozzle connected to the tip of the discharge pipe 18. The hose 4 connected to the rear end of the handle 1 is connected to a liquid supply source (not shown) such as a chemical solution via a pump (not shown).
[0013]
Reference numeral 20 denotes a cylindrical cross hole having substantially the same diameter as or slightly larger than the water passage formed in the flow passage opening / closing member 2 from the outer surface thereof toward the water passage 8. 8 is formed so as to extend a little over the orthogonal direction. Reference numeral 21 denotes a valve stem inserted into the transverse hole 20, and the tip forms a needle valve 22. Reference numeral 23 denotes a male screw portion formed on the valve stem, which is screwed into a female screw portion 24 formed on the transverse hole 20, and 25 is a knob provided on a protruding end of the valve stem 21 protruding outside the channel opening / closing fitting 2, Thus, the valve rod 21 is rotated to change the length of the needle valve 22 entering the water passage 8 to adjust the flow rate.
[0014]
When using this manual valve for spraying chemicals, one or several workers connect their own manual valves to the common chemical supply via separate hoses and pre-press the pressure by the pressure regulating valve of the pump of the chemical supply. Make adjustments. The operator grips the grip portion 1 of the manual valve with one hand, arranges the nozzle 19 at the tip of the discharge pipe 18 above the tip of the tobacco stem, pulls the lever 17 for a certain time according to the spraying amount, opens the valve 12, and sprays the chemical. I do. Normally, the spraying amount is as small as 5 to 30 cc, and the spraying pressure is as low as 0.1 megapascal. For example, when another sprayer working at the same time stops or resumes the work, the pump is sprayed. Fluctuations in the pressure within the hose, such as when the pressure rises or falls, affect the spray rate. Therefore, the needle valve 22 is moved forward and backward by the knob 25 to the water passage 8 to control and adjust the flow rate to an appropriate amount.
[0015]
[Effect of the invention]
According to the present invention, without frequently operating and adjusting the pressure regulating valve of a distant pump, each worker can immediately make fine adjustments at hand while checking the spraying condition on the spot to obtain an optimum spraying amount. Can be realized without scattering. It does not require electronic equipment that requires a power supply, is simple in structure, has no failures, and can be produced at low cost.
[0016]
By attaching a spray plate having a large number of small holes to the nozzle, shower-like spraying can be performed, and the effect of preventing the chemical solution from scattering by spraying an appropriate amount can be further enhanced.
[Brief description of the drawings]
FIG. 1 is an axial longitudinal sectional view of one embodiment of the present invention.
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a schematic view showing a use state of the manual valve of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 grip portion 2 channel opening / closing fitting 4 hose 7 through channel 8 water passage 10 valve mechanism 11 valve seat 12 valve body 14 valve rod 16 fulcrum 17 operating lever 20 transverse hole 21 valve rod 22 needle valve 23 male screw 24 female screw

Claims (2)

A liquid supply hose can be connected to one end of a cylindrical grip having a through flow passage so as to communicate with the through flow passage, and a liquid discharge pipe is connected to the other end of the grip portion so as to communicate with the through flow passage. A manually operated valve, which is provided with an opening / closing valve for the through flow passage and a manual operation lever for opening and closing the valve, wherein the grip portion is provided with a flow adjustment valve for the through flow passage. valve. A part of the other end of the grip portion is constituted by a flow passage opening / closing fitting, and a part of the through flow passage is formed by a water passage penetrating through the fitting, and the opening / closing valve of the through flow passage is formed in the water passage. A cylindrical cross hole having substantially the same diameter or a slightly larger diameter as the water passage is formed in the flow passage opening / closing member from the outer surface thereof toward the water passage, and the cylindrical cross hole is formed in the water passage. Is inserted into the transverse hole, and a valve stem having a distal end forming a needle valve is inserted into the transverse hole, and the external thread formed on the valve stem is inserted into the female thread formed on the transverse hole. The valve rod is screwed together, and the valve rod is rotated by a protruding end protruding to the outside of the channel opening / closing part fitting to change the length of the needle valve protruding into the water passage to change the flow rate. 2. The manual valve of claim 1, wherein said manual valve is adjusted.

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