JPH0446839Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a piston pipe in a multiple piston type power sprayer.

[Conventional technology]

In the multiple piston type power sprayer, as shown in FIG. 5, a plurality of piston pipes 62 are arranged in parallel between the water absorption chamber body and the drainage chamber body. The conventional piston pipe 62 is cylindrical,
Constructed of metal (mainly stainless steel).
A water intake valve attached to the tip of the piston slides inside the piston pipe 62.

[Problem that the invention attempts to solve]

If the piston pipe is made of metal, the inner circumferential surface will be worn due to sliding of the piston gasket that constitutes the water intake valve.

Therefore, it is conceivable to construct the piston pipe from ceramic in order to reduce wear.

If the pitch P between each piston of a multiple piston type power sprayer is left unchanged, the wall thickness t of the piston pipe cannot be increased. Conventional wall thickness t
If the piston pipe were to be made of ceramic as is, there would be a problem that the wall thickness t would be too small and the withstand pressure would be low, making it unusable.

In addition, the piston pipe is sandwiched between the water absorption chamber body and the drainage chamber body by bolts, and a large compressive force is applied to it, so if the piston pipe is made of ceramic with the conventional wall thickness t, a large compressive force will be applied to the piston pipe. It cannot withstand the heat and may break.

In view of the above-mentioned problems, the present invention was made with the aim of providing a ceramic piston pipe with high pressure resistance and compression resistance while leaving the pitch between the plurality of pistons as is. .

[Means for solving problems]

In this invention, multiple pistons are attached to the crankshaft via connecting rods, multiple piston pipes are installed in parallel between the water suction chamber body and the drainage chamber body, and the water suction valve attached to the tip of each piston is connected to the piston. In a multiple piston type power sprayer configured to slide within the piston pipe by reciprocating motion of the piston,
This is the structure of a piston pipe in a multiple piston type power sprayer, characterized in that a plurality of piston pipes are integrated by providing a plurality of piston holes parallel to each other in a pipe body made of ceramic.

〔Example〕

FIG. 1 shows a piston pipe 20 according to the present invention.
2 is a front sectional view of a triple piston type power sprayer equipped with a
The perspective view of the piston pipe 20 according to the present invention, FIG. 4, is also a plan sectional view.

In Figures 1 and 2, crankcase 2
A crankshaft 4 is rotatably supported inside with its axis horizontal, and three pistons 8 are connected to the crankshaft 4 via connecting rods 6. The pitch of each piston 8 is P.

A sliding body 10 is attached to the base end of the piston 8, and this sliding body 10 is slidably inserted into a cylindrical body 12 provided horizontally inside the crankcase 2. It is connected to the stove 6.

A water absorption chamber body 16 is attached to the crankcase 2 via bolts 14, and a piston pipe 20 is interposed between the water absorption chamber body 16 and the drainage chamber body 18. are connected by bolts 22. Thereby, the piston pipe 20 is sandwiched between the water absorption chamber main body 16 and the drainage chamber main body 18. Cylinder base metal fitting 2
Both ends of the piston pipe 20 are kept watertight by an O-ring 26 attached to the piston pipe 4.

The piston pipe 20 is made of ceramic,
As shown in FIGS. 3 and 4, three piston holes 30 are provided horizontally at the same pitch as the pitch P of the piston 8 in a pipe body 28 having a flat track-shaped cross section. Therefore, the wall thickness T ₁ between the adjacent piston holes 30 can be made more than twice the wall thickness t of the conventional piston pipe 62, and the thickness T 1 between the adjacent piston holes 30 can be made more than twice the wall thickness t of the conventional piston pipe 62. Each wall thickness T ₂ of the half circumferential portion of the piston pipe 62 can be made larger than the wall thickness t of the conventional piston pipe 62.

Therefore, the pressure resistance and compression resistance of the piston pipe 20 are much larger than those of the conventional piston pipe 62.

A water suction valve 32 is attached to the tip of each piston 8, and a piston packing 34 forming the water suction valve 32 slides on the inner circumferential surface of the piston hole 30 of the piston pipe 20.

The cylinder base fittings 24 are fitted into both ends of each piston hole 30 of the piston pipe 20, respectively. A drain valve 38 corresponding to each piston 8 is installed in the drain chamber 36 of the drain chamber main body 18, and the drain chamber 36 is equipped with a drain valve 38 corresponding to each piston 8.
A discharge port 40 is provided at 6.

The water absorption chamber main body 16 is provided with a water absorption chamber 42, and this water absorption chamber 42 is provided with a water intake port 44.
In addition, in Figures 1 and 2, 46 is a spillway;
48 is a discharge pressure adjustment screw.

Three pistons 8 are activated by the rotation of the crankshaft 4.
The pistons 8 reciprocate out of phase with each other, and the reciprocating movement of the piston 8 opens and closes the water intake valve 32 attached to the tip. By opening and closing the water intake valve 32, pressure water flows from the water intake chamber 42 to the set pressure of the drain chamber 36 and is discharged from the discharge port 40.

[Effect of idea]

The present invention integrates multiple piston pipes installed in a multiple piston type power sprayer by providing multiple piston holes in parallel in the pipe body. The wall thickness of the adjacent portion and the surrounding portion can be made larger than that of a conventional piston pipe.

As a result, both the pressure resistance and compression resistance of the piston pipe increase, making it possible to construct the piston pipe with ceramics, making it possible to realize a ceramic piston pipe with high wear resistance. Become.

[Brief explanation of the drawing]

FIG. 1 shows a piston pipe 20 according to the present invention.
2 is a front sectional view of a triple piston type power sprayer equipped with a
FIG. 4 is a perspective view of the piston pipe 20 according to the present invention, and FIG. 4 is a plan sectional view, and FIG. 5 is a perspective view of a conventional piston pipe 62 arranged side by side at the pitch P of the piston. The explanation of the symbols of the main parts is as follows. P
... Piston pitch, T ₁ ... Wall thickness between adjacent piston holes provided in the pipe body, T ₂
...Thickness around the piston hole provided in the pipe body, 4...Crankshaft, 6...Conrod,
8... Piston, 16... Water absorption chamber body, 18...
Drain chamber body, 20... Piston pipe, 28...
Pipe body, 30...piston hole, 34...piston gasket.

Claims (1)

[Scope of utility model registration request] Multiple pistons are attached to the crankshaft via connecting rods, and multiple piston pipes are installed in parallel between the water intake chamber body and the drainage chamber body, and the water intake valve attached to the tip of each piston is activated by the reciprocating movement of the piston. In the multi-piston type power sprayer configured to slide inside the piston pipe, multiple piston holes are provided in parallel to each other in the pipe body made of ceramic, so that the multiple piston pipes can be integrated into one body. The structure of a piston pipe in a multiple piston type power sprayer is characterized by: