JPH01229176A - Directional control valve - Google Patents

Abstract

PURPOSE:To smoothly slide a valve by sticking covering bodies made of fluorine-contained resin to sliding portions of the outer peripheral surface of a substantially cylindrical valve having a tying portion and the inner peripheral surface of a valve insertion hole. CONSTITUTION:A substantially cylindrical valve 1 having a tying portion 1a serving as a switching passage in the middle portion thereof is fitted in a valve insertion hole 2 bored in a directional control valve main body in such a manner as to keep watertightness and freely slide in the axial direction. A fluid in a supply passage is changed over to the primary passage 4 side or the secondary passage 5 side by sliding of the valve element 1 and supplied. Covering bodies 8b, 8c made by fluorine-contained resin are stuck to at least one of sliding portions of the outer peripheral surface of the valve element 1 and the inner peripheral surface of the valve insertion hole 2. By this arrangement, the frictional force produced when the valve element 1 is slid can be reduced remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a switching valve whose valve body slides smoothly using fluorine-containing E+&I resin.

(Prior art) Conventionally, some switching valves used in water discharging equipment, etc., which can be used to discharge water L1 from a faucet, have a method in which water is supplied from the faucet by sliding a substantially cylindrical valve body in the axial direction. There are devices that switch water or hot water, for example, between a shower hole and a foam outlet to avoid discharging water.

The above-mentioned switching valve has a substantially cylindrical valve body with a constriction in the middle that serves as a switching flow path, which is connected to the switching valve main body. Connect the supply path connected to the water faucet spout to the point corresponding to the constriction of the valve body in the valve insertion hole, and insert one supply path in the opposite valve insertion hole. On one side, for example, a primary flow path that communicates with the foam opening is connected, and on the other side, a secondary flow path that communicates with the foam end is connected.

By sliding the valve body as described above, the water in the supply channel is switched and supplied to the shower hole side and the foam end side.

The above-mentioned valve body is fitted with a rubber gasket etc. on the outer periphery.
This packing is used as a sliding part against the inner circumferential surface of the valve fitting hole, but when the valve body is slid, the frictional force generated between the packing and the inner circumferential surface of the valve fitting hole is large. The sliding movement of the body became heavy and smooth switching operations were not possible.

In addition, in order to reduce the frictional force generated between the valve body and the inner circumferential surface of the valve insertion hole, a grease material is applied to the sliding part, but this requires a troublesome application process and Since the grease material is expensive, manufacturing costs are high, and the effects of the grease are not permanent.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned problems, and the problem to be solved is that in the switching valve having the above-mentioned structure, the sliding movement between the valve body and the valve insertion hole is The objective is to reduce the frictional force generated on the surface at low cost to make the sliding of the valve body light and smooth.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a valve fitting in which a substantially cylindrical body with a constricted part forming a switching flow path is bored in the switching valve body. It is fitted into the hole to maintain watertightness and to be movable in the axial direction, and the valve is fitted into the hole corresponding to the constricted part of the valve body in the valve fitting hole (this is where the supply path is connected, and the valve is fitted into the hole). A primary flow path is connected to one side of the supply path in the insertion hole, and a secondary flow path is connected to the other side, and the fluid in the supply path is connected to the primary flow path side by sliding the valve body. In a switching valve that switches supply to the secondary flow path side, a covering made of a fluorine-containing resin is bonded to the outer circumferential surface of the valve body, the inner circumferential surface of the valve insertion hole, and at least one of the sliding parts in the valve body. According to the above means, the valve body fitted into the valve insertion hole is switched and slid between the primary flow path side and the secondary flow path side, thereby opening the supply path. The fluid passes through the switching flow path formed by the constriction of the valve body and is supplied to the secondary flow path side or the secondary flow path side.

When sliding the valve body as described above, the sliding parts of the outer peripheral surface of the valve body and the inner peripheral surface of the valve insertion hole come into contact with each other via a covering made of fluorine-containing 4Ei resin with a small coefficient of friction, When the valve body slides, friction is reduced by the fluorine-containing resin covering.

(Effects of the Invention) As described above, the present invention adheres a covering made of a fluorine-containing resin to at least one of the sliding portions of the outer circumferential surface of the valve body, the inner circumferential surface of the valve insertion hole, and the inner circumferential surface of the valve insertion hole. The moving surface slides through a coating made of fluorine-containing resin with a small coefficient of friction.

Therefore, the frictional force generated when the valve body slides is significantly reduced, and the switching operation of the valve body becomes light and smooth, and this operability can be maintained permanently.

Furthermore, since the conventionally troublesome process of applying a grease material is no longer necessary, manufacturing costs can also be reduced.

(Example) Hereinabove, embodiments of the present invention will be described based on the drawings.

Shown in Figure 1? 1 (A) is the spout (1) of the faucet (B))
The figure shows a water discharge device attached to the shower hole (
4') or from the foam end [l(5').

Water discharge device (A> is a connection body (6) screwed onto the water discharge port (b)
A spherical part (6a) provided at the lower end is fitted into the upper end of the partition wall (a), which is the main body of the switching valve, and is supported so that the direction of water discharge can be freely changed.

A supply channel (3) is formed in the center of the connecting body (6) and the partition body (a), and is located in the center of the valve insertion hole (2) that is bored horizontally with respect to the partition body (a). I will contact you.

The valve insertion hole (2) is a hole into which the valve body (1) is inserted, and a valve port (7aH7b) with a smaller diameter than the valve insertion hole (2) is connected to the supply path (3). ) are opened toward both ends of the peripheral hole (2).

The valve body (1) is formed into a shape with an inner diameter slightly smaller than the inner diameter J of the valve fitting hole (2), and has a constricted part (1) forming a switching flow path (9) in the center of the valve body (1). 1a) is formed to have a diameter one size smaller than the valve ports (7a) and (7b), and substantially conical rubber valves (1bH1b') are fitted into the step portions at both ends of the constricted portion (1a), A rubber O-ring (1c) (lc') is fitted next to this valve (1b) (ib').

The above valves (1b) (1b') and O-rings (1c) (lc
) is a sliding surface on the outer circumferential surface of the valve body against the inner circumferential surface of the valve insertion hole (2), and each outer circumferential portion has a sheath-shaped covering (1) made of fluorine-containing resin. 8b)
and (8C) are glued together.

The covering body (8b) (8c) made of fluorine-containing resin has a valve insertion hole (
2), and reduces the frictional force generated on this surface when the valve body (1) is slid.
Relatively soft fillers such as polyamide resin and carbon to tetrafluoro polyamide resin.

Valves (1b) (1b') are made by adding graphide, etc. and molding them into a ring shape so that they can be tightly adhered to the outer circumferences of valves (1b) (1b') and O-rings (1cN1c').
) and O-rings (Ic) (1c').

The fluorine-containing resin covering (8b) (8c) is the valve body (1
) The sliding part between the outer circumferential surface and the inner circumferential surface of the valve fitting insertion hole (2) is attached to either one or the other. 8c) After chemical surface treatment is applied to the surface of the metal plates 1 to 1 with liquid, etc., the valve (1bH1b'), which becomes the sliding part on the outer circumferential surface of the valve body (1), and the O-ring are removed. (1c) (1c'
) is attached to the outer periphery using epoxy thread adhesive.

According to the above bonding method, strong bonding is possible, and the valve <
1b) (lb'), O-ring (1cH1c')
will not peel off.

Thus, the valve body (1) connects the constricted portion (1a) to the valve port (7a).
) (7b) When inserted into the valve insertion hole (2), the valve (1b) to which the covering (8b) (8C) is adhered
H1b') and the O-rings (1c) (1c') form a sliding surface that closely contacts the inner peripheral surface of the valve insertion hole (2), allowing the valve body (1) to be axially moved within the insertion hole (2). It is possible to freely slide in the direction, and the sliding part is kept watertight.

Connect the constricted part (1a) of the valve body (1) to the valve 0 (7a) (7
b) By fitting and tightening in the inside, a space is formed between the constricted portion (1a), the valve port (7aH7b), and the inner surface of the valve fitting hole (2) in which the switching flow path (9) is formed.

In addition, a primary flow path (7'1.) communicating with the shower hole (4') is provided on one side of the valve fitting hole (2) sandwiching the supply path (3).
and the other side is connected to a secondary flow path (5) which communicates with the foam end (5').

Therefore, when the valve body (1) is slid toward the foam end side as shown in FIG. 1, the valve port (7a) is closed by the valve body (1b).
As a result, the water in the supply channel (3) passes through the switching channel (9) and flows into the secondary channel (5), causing the porous body (10) provided in the foam end (5') to flow into the secondary channel (5). The water passes through the water and is discharged in the form of foam.

Furthermore, as shown in Fig. 3, when the valve body (1) is switched to the shower side, the valve port (7b) is closed by the valve (1b'), thereby draining the water in the supply path (3). Switching flow path (9
) and flows into the primary flow path (4) and into the foam end port (5
Water is discharged in the form of a shower from a large number of holes (4) drilled around the hole (4).

As mentioned above, when the switching valve (C) slides on the valve body (1), the circular part that goes down on the outer circumferential surface of the valve body (1) is against the inner circumferential surface of the valve insertion hole (2). The cover body (8a) (8b) is made of a fluorine-containing resin and has a small coefficient of friction. Therefore, the frictional force generated on the sliding surface is significantly reduced, and the switching operation of the valve body (1) becomes light and smooth.

In addition, the above-mentioned fluorine-containing resin covering (8b) (8C
) is a compound made of polytetrafluoroethylene resin and a relatively soft filler, so it does not wear out the inside of the valve insertion hole (2) and can be used as a single covering material (8b). (8c
) itself has little wear and has a linear expansion coefficient of 9. Approximately OX 10'/'C and valve (1b)
(1b') and O-ring (1c) (Ic').

The switching valve (C') shown in Fig. 4 has a water stop function, and has a primary flow path (4) connected to the valve insertion hole (2).
and the secondary flow path 5) were connected to each other according to the positions of the sliding parts of both valves (1b) (1b') that are connected to the valve body (1) in the neutral state as shown in the figure. In this state, both the secondary and secondary flow paths (4) and (5) are connected to the valve (1b).
(1b') and are closed together to stop water.

Furthermore, if the valve body (1) is slid from the neutral state to the shower side or the foam end side, the water in the supply channel (3) can be transferred to the switching channel (9), similar to the switching valve (C) described above. ), water is selectively discharged to the shower hole (4') and the foam outlet (5) (not shown).

Moreover, as mentioned above, the sliding of the valve body (1) is caused by the covering body (8b
When it becomes lighter due to H8c), the valve body (1) is moved by water pressure.
As shown in Figure 5, the valve body (1) can be locked in the shower side, neutral, and foam end positions using the locking mechanism (11). You may also do so.

Also, is it made of fluorine-containing resin? ! 12 The covering material is the valve (as described above).
1b) (1b') and O-ring (1cH1c'), but also on the sliding part on the outer circumferential surface of the valve body (1) and the inner circumferential surface of the valve insertion hole (2). If there is one, it can be glued to any location.

Furthermore, the covering made of fluorine-containing resin can be used for other sliding parts.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a water discharge device equipped with a switching valve according to the present invention, Fig. 2 is an enlarged view of the sliding part in Fig. 1, and Fig. 3 is a state in which the valve body is switched to the shower side. Fig. 4 is a vertical cross-sectional view showing a water discharge device with a switching valve equipped with a water stop function
j. Longitudinal cross-sectional view showing the water spray tool; FIG. 5 is a vertical cross-sectional view showing the water spray tool equipped with a locking mechanism. In the figure, A, A': water discharge tool a: bulkhead (switching valve main body) C: switching valve 1: valve body 1a: constricted part 1b, 1b': valve 1c,
1c': O-ring 2: Valve fitting hole 3: Supply hole
7′l primary flow path 5: secondary flow path 8b,
8c: Covering body 9: Switching flow path

Claims (1)

[Claims] A substantially cylindrical valve body (1) with a constricted part (1a) forming a switching flow path (9) in the middle is kept watertight in a valve insertion hole (2) drilled in the main body of the switching valve (C). and is fitted so as to be slidable in the axial direction, and a supply path is connected to a portion corresponding to the constricted portion (1a) of the valve body (1) in the valve fitting insertion hole (2), and
The primary flow path (4
) and connect the secondary flow path (5) to the other side, and by sliding the valve body (1), the fluid in the supply path is transferred between the primary flow path (4) side and the secondary flow path (5). In the switching valve, a covering member (8b) (8c) made of a fluorine-containing resin is provided on at least one of the sliding parts on the outer circumferential surface of the valve body (1) and the inner circumferential surface of the valve insertion hole. Glued structure.