JPH0416032Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metered supply valve suitable for repeatedly injecting a fixed amount of liquid fertilizer, soil fungicide, etc. into the soil of a field.

[Prior Art] As shown in FIG. 4, this type of device has conventionally introduced a pressurized liquid fertilizer tank (not shown) to a supply valve 40 through a hose or the like, and opens and closes the supply valve 40 to feed a metal The liquid fertilizer is injected into the soil of the paddy field from a nozzle 49 provided at the tip of the liquid fertilizer injection pipe 48 for efficient fertilization. 47 is an operating handle, and 46 is a stopper.

As shown in FIG. 3, the supply valve 40 of the above device houses a valve body 34 in a valve chamber 33 having a pressurized liquid inlet 31 and a pressurized liquid supply port 42, and inserts the valve body 34 into a valve seat 36.
A protrusion 38 is provided on a valve stem 37 which has a structure in which it is pressed into contact with a spring 35 and extends in the direction of movement of the valve body.

On the other hand, the protrusion 38 is latched to a notch 42 provided in the opening/closing lever 41 supported in the support portion 39 on a holding member of the supply valve 40 such as the handle 47. A fixed amount of liquid fertilizer is supplied by gripping the handle 47 for a fixed period of time and then releasing the lever to return it to its original position.

[Problems to be solved] However, the opening/closing time of the above-mentioned valve depends on the intuition and skill of the operator, and there may be significant unevenness in the state of fertilization depending on the operator. However, as fatigue increased, it became extremely difficult to supply a constant amount.

[Purpose of the invention] The object of the present invention is to eliminate the drawbacks of the prior art and to provide a quantitative supply valve that allows even an unskilled person to supply a fixed amount of liquid fertilizer or the like during operation.

[Configuration of the invention] The gist of the invention is that the pressurized liquid inlet 1 and the pressurized liquid outlet 2
a valve body 5 which has a valve seat 4 near the pressurized liquid outlet of the valve chamber 3 having
A valve stem 6 fixed to the valve body extends in the direction of movement of the valve body, penetrates the wall surface of the valve chamber, and projects out of the valve chamber, and a protrusion 7 provided on the protruding portion of the valve stem. The spring 10 is movably attached to a swing lever 9 provided on a valve chamber holding member that holds the valve chamber on the valve chamber side of the valve chamber, and is biased by a spring 10 whose one end is supported on the swing lever side. An engaging member 11 is press-fitted with the valve, and by rotating the swing lever, the engaging member moves the protrusion 7 in the valve opening direction and moves the protrusion against the biasing force of the spring 10. The point is that the valve body is configured to open for a certain period of time approximately determined by the biasing force of the spring 10 when climbing over the portion 7. Hereinafter, it will be explained in detail based on examples. FIG. 1 shows a fixed quantity supply valve showing an embodiment of the present invention, and shows a pressurized liquid inlet 1 connected to a rubber hose connected to a tank (not shown) for pumping liquid fertilizer, etc., and FIG. A valve seat 4 is provided facing the pressurized liquid outlet 2 in a cylindrical valve chamber 3 having a pressurized liquid outlet 2 connected to a liquid fertilizer injection pipe (not shown) similar to the liquid fertilizer injection pipe 48 shown in FIG. ing. A conical valve body 5, which is housed in the valve seat 4 so as to be movable in the axial direction of the cylindrical valve chamber 3 and is biased by a compression spring 5a, is pressed against the valve seat 4 and closed. One end of a valve stem 6 extending in the direction of movement of the valve body 5 is fixed to the valve body 5.
The other end penetrates a closed end 3a serving as a wall surface of the valve chamber 3 while maintaining watertightness, and projects out of the valve chamber 3. 3b is a sealing member, 8b is a valve chamber holding member 8
This is a guide hole for the valve stem 6 provided in the. A protrusion 7 is provided at a suitable position on the portion of the valve stem 6 that protrudes outside the valve chamber 3. On the other hand, the valve chamber holding part 8a of the valve chamber holding member 8, which is fixed to the liquid fertilizer injection pipe (not shown) and is installed astride the valve chamber 3 and the operating handle 11 for inserting and removing the same into the paddy field, Rod guide hole 8
A U-shaped swinging lever 9 is located at an intermediate position leading to point b.
It is rotatably attached to the shaft with the valve stem 6 sandwiched therebetween.
The opposing pieces 9a, 9b of the swing lever 9 are provided with guide tubes 9c, 9d inside thereof, and an engaging member 11 made of an inverted U-shaped round rod is installed in the guide tubes 9c, 9d. In the state where the engaging member 11 is straddled over the rod 6, the vertically opposed parts 11a and 11b of the engaging member 11 are movably housed, and the opposed parts further movably pass through the bottom piece 9e of the U-shaped swinging lever 9. Ori,
A compression coil spring 10 is installed between the connecting piece 11c connecting the opposing parts 11a, 11b at their lower ends and the bottom piece 9e.
11b is wound, and biases the engaging member 11 and the valve stem 6 in the direction of pressing. Further, an adjusting threaded rod 12 is projecting downward from the bottom piece 9e of the swing lever 9, and this threaded rod 12 is bored near the center of the connecting piece 11c of the engagement member 11. The coil spring 10 is movably inserted through a through hole 18, and the restoring force of the coil spring 10 is adjusted by an adjustment screw 13 screwed into the vicinity of the protruding end of the threaded rod. 9a is a lever handle for rotating the swing lever 9.

In the quantitative supply valve of the above embodiment, the liquid fertilizer injection pipe (not shown) is inserted into the soil, and then the lever handle 9
When the handle a and the operating handle 11 are squeezed together, the swing lever rotates in the counterclockwise direction in FIG. At this time, the engaging member 11 moves upward against the biasing force of the compression spring 10 and overcomes the protrusion 7 . At this time, the protrusion 7 is moved rightward by the engaging member.
That is, it moves in response to a component force in the valve opening direction, and when the engaging member 11 gets over the protrusion 7, it returns to close the valve seat again due to the tension of the spring 5a. By appropriately selecting the shape of the engaging member and the shape of the protrusion, an almost constant valve opening time can be obtained regardless of how the lever handle is operated.

FIG. 5 shows another embodiment of the present invention. In the embodiment described above, the liquid fertilizer injection pipe is inserted into and removed from the paddy field etc. using the operation handle 11, and the lever handle 9a is used only for opening the valve. However, the case shown in FIG. 5 is characterized in that the lever handle 20 also serves as an operating handle. That is, the feature of this embodiment is that the holding member 23 of the valve chamber 22 is connected to the valve stem guide hole 2.
A ring-shaped locking portion 25 is provided at the bottom of the lever handle 20 to ensure the swinging range of the lever handle 20 and to prevent the lever handle from moving up or down more than necessary when the lever handle is operated in the vertical direction. The lever handle 20 is inserted through the portion 25, and other constructions are substantially the same as those of the previous embodiment. This allows you to hold the operating handle 20a and the lever handle 20, push it downward to push the liquid fertilizer injection pipe 26 into the paddy field, and then lift both handles 20a, 20 upward to pull out the liquid fertilizer injection pipe 26. Then, the lever handle 20 first swings upward by the length allowed by the locking portion 25, and then begins to be pulled out. During this oscillation,
An engaging member (not shown) moves the valve rod 27 in the valve opening direction and operates to open the valve for a certain period of time. 28a
28b is a pressurized liquid inlet, 28b is a pressurized liquid outlet, and 29 is an adjustment screw for adjusting the restoring force of the coil spring 30.

[Effects] According to the present invention, it is possible to always supply a constant amount of medicinal solution regardless of the operating proficiency level, and there is no need to make delicate adjustments, so the fatigue of the hands and fingers is significantly reduced, and Since liquid fertilizer and other fertilizers are applied evenly, it has the effect of preventing uneven growth of crops.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIGS. 3 and 4 are explanatory diagrams showing an example of the prior art. FIG. 5 is a partial sectional view showing another embodiment of the present invention.

Claims (1)

[Scope of utility model registration request] A valve stem has a valve seat near the pressurized liquid outlet of a valve chamber having a pressurized liquid inlet and a pressurized liquid outlet, and has one end fixed to a valve body that elastically presses against the valve seat,
The valve stem extends in the movable direction of the valve body, penetrates the wall surface of the valve chamber, and protrudes outside the valve chamber, and is provided on the valve chamber side of a protrusion provided at an appropriate position on the outside of the valve chamber of the valve stem. The engaging member is press-fitted with an engaging member that is movably attached to a swinging lever that is pivotally supported on the valve chamber holding member and is biased by a spring that has one end supported on the lever side. , a pressurized liquid characterized in that, by rotating a swinging lever, the engaging member moves the protrusion in the valve opening direction and climbs over the protrusion against the spring pressure. metering valve.