JPS625245Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a plunger for a reciprocating type power sprayer used for pest control and water pumping.
Power sprayers rotate the crankshaft to move the plunger back and forth within the cylinder, sucking water through the water intake valve and discharging it through the discharge valve, but it is not possible to completely seal the gap between the plunger and the cylinder. Can not.

Generally, a V-shaped gasket is used to stop liquid that adheres to the plunger surface and leaks.

However, even so, as the plunger reciprocates hundreds of times per minute, chemical liquid gradually leaks out from the end of the V-shaped gasket between the crankcase and cylinder in conventional power sprayers, as shown in Figure 1. It was sagging.

In order to prevent leakage from the end of the V-shaped gasket from being discharged outside the machine, this invention provides a passageway for absorbing water at the end of the V-type gasket, and even if it leaks, the leaked water will enter the plunger again. This is what I did. Rather than trying to achieve a complete seal, the idea was to achieve the same effect as a complete seal by restoring any leakage to the original state.

Furthermore, in the plunger of a power sprayer, the external sliding part of the plunger that comes into direct contact with the chemical solution and the V-shaped gasket wears out quickly.
Conventionally, the entire plunger had to be replaced when it wore out, which was expensive, and if only the sliding part was made to have greater wear resistance to prevent wear, it would become even more expensive.

In order to solve this problem, the present invention makes it possible to remove the sliding part of the plunger from the other parts of the plunger, thereby improving the ease of replacing the plunger as a consumable item.

Furthermore, it is possible to replace or tighten the Loring valve body, which constitutes the suction valve attached to the tip of the plunger, if it becomes worn or loosened.

The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is a side sectional view of a conventional power sprayer.

An input pulley 1 is rotated by an engine or a motor, and a crankshaft 2 fixed to the input pulley 1 is rotated. A connecting rod 3 is pivotally connected to the crankshaft 2 via a bearing metal, and the tip of the connecting rod 3 is pivotally connected to a plunger 5 by a plunger pin 4.

The plunger 5 reciprocates within the cylinder 6,
A V-shaped gasket 7 is interposed between the cylinder 6 and the plunger 5. Conventionally, liquid gradually adhered to the plunger 5 from the inner periphery of the V-shaped gasket 7 and leaked out, and dripped below the cylinder 6 as shown in FIG.

The water suction pipe 8 was provided in front of the water suction valve 9, and the plunger 5 and the water suction pipe 8 were arranged at opposite positions with the water suction valve 6 at the center. That is, in the conventional type, the water intake valve 9 is fixed to the cylinder 6,
It did not reciprocate together with the plunger 5.

As the plunger 5 retreats, the chemical liquid is sucked in from the water suction pipe 8, the valve body of the water suction valve 9 is pushed open, and the chemical liquid enters the cylinder 6 and the plunger 5
As the pump moves forward, it is discharged in the direction of the discharge valve 10, and it is pushed out in the direction of the discharge pipe 11 by operating the discharge pot 11a. 12 is a pressure chamber.

In conventional power sprayers, the only way to handle the chemical liquid leaking from the V-shaped gasket 7 is to provide a leakage liquid reservoir and return it to the chemical liquid tank once it has accumulated, or else the chemical liquid leaks out.

In order to improve this point, the present invention has a cylinder 6, a plunger 5, and a water intake valve 9 as shown in Figure 2.
It is composed of

Figure 2 is a side sectional view of the power sprayer of the present invention;
FIG. 4 is a sectional side view of the plunger with a replaceable V-shaped packing part, and FIG. 5 is an enlarged side view showing the state in which the water intake valve is installed.

The plunger is divided into a plunger base 5a and a plunger 5, and the plunger base 5a and the plunger 5 are connected by a connecting bolt 13. Plunger base 5a of connecting bolt 13
A connecting ring 14 is fixed to the opposite side with a tightening bolt, and the connecting ring 14 is fixed to the plunger 5 by an inner stepped portion of the plunger 5 and a C-shaped ring 15. Remove the tightening bolt 18 from the plunger 5 and remove the connecting ring 14.
Remove the whole plunger, remove the water suction valve 9 by rotating the screw part, and replace it with a new plunger. The tightening bolt 18 is configured so that an inner diameter spanner can be inserted thereinto since it is difficult to apply a spanner thereto.

The water intake valve 6 is constructed as an assembly,
Apply the valve body 6b to the valve seat 6a from the right side, and
The valve spring 6c is applied to the valve cage 6d, and the valve spring is held down by the valve cage 6d. 6e is an opening.

A screw 6f is carved on the outer periphery of the valve cage 6d, and the water intake valve 6 is fixed to the plunger 5 by screwing the screw 6f into a screw on the inner diameter of the plunger 5.

The water suction valve moves back and forth as a unit by the reciprocating motion of the plunger 5. V-shaped gasket 7 is spring 1
6, the water suction pipe 17 is pressed against the mounting body 17a side.

The water suction pipe 17 is screwed to the rear connecting rod side of the V-shaped gasket 7, and the water suction pipe mounting body 17
A is connected to the cylinder 6 and is configured in a sealed manner so that the chemical solution does not leak.

As the plunger 5 retreats to the left, the chemical liquid passes through the water suction pipe 17, the water suction pipe attachment body 17a, and the inner diameter of the plunger 5, and pushes the valve body 6b of the water suction valve 6 open against the spring 6c, and enters the cylinder from the opening 6e. 6.

Conversely, as the plunger 5 advances to the right, the valve body 6b closes and the medicinal liquid is pushed toward the plunger 5.
It is fed under pressure through the discharge valve 10 and exits to the discharge pipe 11. At the same time, as the plunger 5 moves to the right, the new chemical solution flows into the water suction pipe 17,
It enters the inner diameter portion of the plunger 5 from the water suction pipe attachment body 17a. Even if a small amount of chemical solution leaks from the V-shaped gasket 7 due to the violent back-and-forth movement of the plunger 5, it will only enter the inner surface of the water suction pipe attachment 17a, so it will join the flow of new chemical solution again and the plunger 5. This structure eliminates the leakage of return oil from the V-shaped packing 7.

Further, as shown in FIG. 3, the plunger 5 is integrally formed and is configured to be separated from the water intake valve 6,
It is possible to easily replace the rolling ring 6g or the valve body 6b that constitutes the water intake valve 6, and
As shown in FIGS. 2 and 3, it is also possible to configure the device so that the chemical liquid leaking from the V-shaped gasket 7 can enter the plunger 5 again.

As described above, in the present invention, the valve body 6b is applied from the right side to the valve seat 6a constituting the water intake valve 6, and the inner periphery of the tip of the plunger 5 and the outer periphery of the valve cage 6d are pressed against the valve spring 6c with the valve cage 6d. The water suction valve 6 is fixed to the plunger 5 with the inner diameter portion as the water intake port by providing a screw groove 6h and screwing the valve cage 6d to the screw on the inner diameter of the plunger 5, thereby creating a V-shaped gasket. Even if the chemical solution leaks from between the plunger 7 and the plunger 5, the leaked amount will enter the plunger 5 again, so it will have the same effect as a complete seal.In addition, only the plunger 5 can be converted and the water intake valve installed at the tip of the plunger. 6 can be replaced, the construction is cheaper than the conventional plunger in which the entire plunger is replaced.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of a conventional power sprayer;
The figure is a side sectional view of the power sprayer of the present invention, Figure 3 is a side sectional view of the integrated plunger, and Figure 4 is a side sectional view of the power sprayer of the present invention.
The figure is a side cross-sectional view of a plunger with a replaceable V-shaped gasket, and FIG. 5 is an enlarged side cross-sectional view showing the state in which the water intake valve is installed. 5...Plunger, 6...Water intake valve, 6a...
Valve seat, 6b...valve body, 6c...valve spring, 6d...
Bench basket, 6h...screw groove.

Claims (1)

[Scope of utility model registration request] The valve body 6b is applied from the right side to the valve seat 6a constituting the water intake valve 6, and the inner circumference of the tip of the plunger 5 and the valve cage 6 are pressed to press the valve spring 6c with the valve cage 6d.
A screw groove 6h is provided on the outer periphery of the plunger 5, and the valve cage 6d is screwed onto the screw on the inner diameter of the plunger 5, so that the water intake valve 6 is attached to the plunger 5 with the inner diameter part as a water intake port.
A power sprayer characterized by having a fixed.