JPS58675A - Flux control valve - Google Patents

Abstract

PURPOSE:To provide a flux control valve which can assuredly control flux delicately by a little force by providing a small cup having a hole at the bottom thereof and packing on the outer periphery of the sides of an opening portion and the bottom, which is fitted in a large cup having a hole at the side thereof in such a manner as to go in and out freely. CONSTITUTION:Pressure of a fluid is applied to the whole outside surface of a small cup 16, so that the direction of the pressure crosses at right angles with the moving direction, vertical direction of the small cup 16. Since the pressure will not increase a pressing force of a packing, the force for moving the small cup 16 does not vary with the pressure. When the temperature rises, a push rod 26a of a heat-sensitive unit pushes up the small cup 16 a little. At this time an opening packing 20 is brought into contact with the inner surface of a large cup 10, and a bottom packing 22 is positioned a little above the lower end of a hole 14 of the large cup. Accordingly, the fluid flows through a narrow portion below the hole 14 and the bottom of the small cup 16 to the upper part of a partition plate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flow control valve used in a cooling water temperature thoracic valve for an internal combustion engine.

The flow rate a valve used in conventional temperature control valves receives the pressure of the fluid in the direction of movement of the valve element, so a large force is required to move the valve element, resulting in a delay in operation and operation failure. It is unstable. In addition, even if a normal gate valve is used, and the fluid pressure is applied from a direction perpendicular to the direction of movement of the valve body, the above disadvantages will not occur because the vibration force between the valve body and the seal will increase due to the fluid pressure. I can't erase it. The present invention solves the above-mentioned drawbacks by making the valve body cup-shaped and receiving fluid pressure from the entire outer surface of the valve body.

The present invention will be explained according to an embodiment in which the present invention is used in a temperature control valve shown in the drawings. In the figure, lO is a large cup, with the mouth facing upward, and seven lunges 10a protruding from the outer periphery of the side of the mouth.
Fixed at 2. A hole 14 is bored in the side surface of the large cup IO, the width of which is smaller at the lower end than at the upper end. In the figure, reference numeral 16 denotes a small cup, which is fitted into the large cup IO with its mouth facing upward, and is pressed downward by a spring 18. The outer periphery of the side surface of the small cup is covered with a membrane of an elastic material such as rubber, and the upper and lower ends, that is, the outer periphery of the side surface of the mouth and " portion of the small cup are made to protrude to form a gasket 20.22. At this time, the distance from the point where the mouth gasket 20 contacts the inner surface of the large cup 10 to the mouth edge of the large cup 10 is larger than the distance from the point where the bottom gasket 22 contacts the inner surface of the large cup 10 to the lower end of the hole 14 of the large cup. Take. Furthermore, a hole 24 is bored in the bottom surface of the small cup 16. Reference numeral 26 in the figure is a temperature sensing element attached to the large cup 10, and when the temperature rises, the extrusion rod 26
A pushes the small cup 16 upwards.

This valve operates as follows. In this case, it is assumed that the fluid flows upward from one side of the partition plate.

In FIG. 1, which shows the valve in the closed state, fluid pressure is applied to the entire outer surface of the small cup 16. Therefore, the direction of the pressure is perpendicular to the vertical direction, which is the moving direction of the small cup 16, and the pressure does not increase the pressing force of the packing, so the force for moving the small cup 16 does not change depending on the pressure.

Next, when the temperature rises, the pressure rod 26a of the temperature sensing element pushes the small cup 16 up a little, as shown in FIG. At this time, the mouth gasket 20 is in contact with the inner surface of the large cup 10, and the bottom gasket 22 is located slightly above the bottom 4 of the hole 14 of the large cup.

Therefore, the fluid flows to the bottom of the small cup 16 through the narrow width part of the loincloth of the hole 14, and further flows to the upper part of the partition plate through the hole 24 of the small cup.

In other words, in this state, a small amount of fluid flows.

Next, when the temperature further rises, the pressure 1$26a of the temperature sensing element further pushes the small cup 16 up, as shown in FIG. At this time, the mouth gasket 20 is located above the lip of the large cup 10, and the bottom gasket 22 is located widely and upwardly apart from the lower end of the hole 14 of the large cup. Therefore, the fluid flows into the bottom of the small cup 16 through the part of the large cup hole 14 below the wide part where the gasket 22 is located, and further flows above the partition plate through the small cup hole 24. The water passes through the hole 14 of the large cup and the space between the large cup and the small cup, passes near the gasket 20, and flows above the partition plate. In other words, in this state, a large amount of fluid will flow.

As can be seen from the above, the flow control valve of the present invention is characterized in that the force for moving the valve body is completely unaffected by the pressure of the fluid. Further, as in the above embodiment, by selecting the shapes of the packing 20, 22 and the hole 14 of the large cup, the relationship between the position of the small cup 16 and the flow rate can be set arbitrarily. At this time, as shown in FIG. 5, if the gasket 28 is fixed to the outer bottom surface of the small cup and a small hole 301 is bored in the bottom surface of the large cup 10, the fluid will flow through the small hole 30fk at the same time as the valve is opened. , the flow rate immediately after opening the valve can be increased. Note that this small hole 30 directly affects the operating force of the small cup by the pressure of the fluid, so its size must be kept sufficiently small.

The valve of this invention is the above 4? Ikvj is widely used because there are signs.
It can be used in Section 4. It is especially suitable for temperature control valves that require reliable and delicate flow rate adjustment with small force.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of one embodiment of the present invention in a valve closed state, Fig. 2 is a side view of the same, Fig. 3 is a sectional view of the same partially open state, and Fig. 4 is a sectional view of the same in a fully open state. FIG. 5 is a partial cross-sectional view of another embodiment. 10 of 1 is a large cup, 14 is a hole in the large cup, 16 is a small cup, 20 is a mouth seal, 22 is a bottom seal, 2
4 indicates the holes of the small cups, respectively. Fang 2

Claims (1)

[Claims] l Hole at the bottom? : A flow rate i# regulating valve formed by fitting a small cup having N and inner and outer circumferential C packings protruding from the mouth and bottom into a large cup having holes on 11 sides so as to be able to move in and out.