JPS6227751Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pressure regulating valve whose purpose is to enable not only pressure regulation using a pressure regulating screw but also switching between low pressure and high pressure by operating a handle.

Conventional pressure regulating valves have a structure in which a spring that presses and holds the valve body at a set pressure can be further regulated with an adjusting screw, so when used in a speed sprayer, for example, the nozzle sprays at a low pressure.
In addition, since high pressure is required to operate the jet pump, the set pressure was adjusted each time using an adjustment screw. However, with this method, not only is the pressure adjustment operation troublesome, but there are also problems such as the inability to accurately adjust the pressure, which in turn causes a decrease in the efficiency of the spraying operation.

This invention was made with the intention of solving the above problem, and a cylinder portion containing a spring that presses the valve body is connected to a valve body in which a valve seat and a valve body are housed. In the pressure regulating valve which is provided with an operating means for pressing the spring from the outside of the cylinder part, the cylinder part has a first cylinder half having a thread carved on the outer peripheral edge, and a first cylinder half having a thread carved on the inner peripheral edge. and a second cylinder half having a rotatable operating handle pivotally supported at one end thereof is fitted so as to be movable back and forth, while an adjustment member is fitted to one end of the spring via a presser piece. It is an object of the present invention to provide a pressure regulating valve in which an operating rod is slidably projected to an end of the second cylinder half, and the operating handle can be pressed toward and away from one end of the operating rod.

Examples of this invention will be described below based on the drawings.

The drawing is a cross section showing the pressure regulating valve of this invention.
Reference numeral 1 denotes a valve body, which has a passage 4 that communicates between a primary port 2 and a secondary port 3, and a valve seat 5 formed in this passage 4 so that a valve body 6 can be seated. It is deployed in Reference numeral 7 denotes a cylinder portion, which is a first cylinder half 7a attached to the valve body 1.
and a second cylinder half 7b that is screwed to the first cylinder half 7a, and a pressure regulating valve that keeps the valve body 6 always seated on the valve seat 5 is provided in the cylinder part 7. A spring 8 is disposed, and a presser piece 9 that holds the end of the spring 8 is provided.
An operating rod 10 having a cylindrical shape is slidably penetrated through a through hole 7c formed at the end of the cylinder portion 7, that is, the end of the second cylinder half 7b, and protrudes outward. In this case, the operating rod 10 is provided with a male threaded portion 11, a pressure regulating nut 12 is screwed to this male threaded portion 11, and the pressure regulating nut 12 is adjusted to connect the pressure regulating nut 12 and the cylinder portion 7. By adjusting the distance L from the end, the set pressure on the high pressure side can be set arbitrarily.

Further, a bracket 13 is protruded from the side of the cylinder portion 7, that is, the side of the second cylinder half 7b, and an operation handle 15 rotatably pivotally connected to the bracket 13 with a pin 14 is connected to the cylinder. The operating handle 1 can be rotatably moved forward and backward relative to the end of the section 7.
5 and the operating rod 10 are formed to be removable.

The pressure regulating valve of this invention constructed as described above uses the spring 8 which makes the nozzle spray pressure in the speed sprayer 16 kgf/ ^cm2 , and adjusts the pressure regulating nut 12 to operate the jet pump. The pressure is set at 25Kgf/cm ² , and since the nozzle spray pressure is always required, the first cylinder half 7a and the second cylinder half 7a are adjusted to a predetermined value of 16Kgf/cm ^{2 .} This is the same as adjusting a conventional pressure regulating valve. Next, in order to operate the jet pump, the operating handle 15 is tilted toward the cylinder portion 7 to engage the operating rod 10, and the operating rod 10 and the holding piece 9 are moved toward the valve body 6 to tighten the pressure regulating nut. 12
When the spring 8 is brought into contact with the cylinder portion 7, the spring 8 is compressed and set to a predetermined set pressure of 25 kgf/cm ² . The time it takes to operate this jet pump is about 5 minutes at most, so during that time the operating handle 15 must be kept tilted down, or the jet pump can be operated using a hook (not shown), etc., and after the jet pump has finished operating, the operating handle If 15 is released, the nozzle spray pressure will return to the original 16 kgf/cm ² .

As explained above, according to the pressure regulating valve of this invention, since the cylinder part fits into the first cylinder half and the second cylinder half so that they can move forward and backward,
By expanding and contracting the cylinder part, it is possible to adjust the first pressing force on the spring that presses the valve body, and
In order to press the operating handle so that it can come into contact with and separate from one end of the operating stick that is slidably protruded toward the end of the second cylinder half, the second pushing force is applied to the first spring as appropriate. (a) By fitting the first cylinder half and the second cylinder half so that they can move forward and backward, it is possible to press the cylinder part with a diameter larger than that of the spring. Therefore, fine adjustment of the first pressing force to be set becomes easy, and the thread shearing area is large, making it possible to prevent displacement of the first pressing force due to the second pressing force.

(b) Since the rotatable operating handle is pivoted on one end of the second cylinder half, it can be rotated so that it can always move toward and away from the operating stick. It has excellent effects such as being able to easily move forward and backward with the cylinder half, and also being able to reliably apply the second pressing force to the operating stick, and its utility value is remarkable. It is.

In the above embodiment, the pressure regulating valve of this invention is used in a speed sprayer, but it is of course possible to use it in other applications besides speed sprayers.

[Brief description of the drawings]

The drawing is a sectional view showing the pressure regulating valve of this invention. In the figure, 1... valve body, 2... primary side port, 3... primary side port, 4... passage, 5... valve seat, 6... valve body, 7... cylinder section, 7c... transparent Hole, 8... Spring, 9... Presser piece, 10...
Operating rod, 11... male threaded portion, 12... pressure regulating nut, 15... operating handle.

Claims (1)

[Scope of utility model registration request] A cylinder portion containing a spring that presses the valve body is connected to a valve body that includes a valve seat and a valve body, and an operating means that presses the spring from the outside of the cylinder portion is provided. In the pressure regulating valve, the cylinder portion includes a first cylinder half having a thread carved on the outer peripheral edge, and a thread carved on the inner peripheral edge,
The second shaft has a rotatable operating handle at one end.
While the cylinder half is fitted so that it can move forward and backward,
An operating rod having an adjustment member fitted to one end of the spring via a presser piece is slidably protruded to an end of the second cylinder half, and the operating handle is moved toward and away from the one end of the operating rod. A pressure regulating valve that can be pressed down.