JPS6224584B2 - - Google Patents

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a flush valve, in particular, a valve body is formed by screwing an upper valve member and a lower valve member, and there is a relief between these valve members. This relates to a valve body disposed via a spring.

<Prior Art> Conventionally, this type of flush valve has been disclosed in, for example, Japanese Utility Model Application Publication No. 54-150649.

To explain the method disclosed in Japanese Utility Model Application Publication No. 54-150649, a spring is elastically loaded from the back surface of the upper valve member constituting the ceiling surface of the relief valve chamber to the back surface of the relief valve body. is pressed against the relief valve seat formed in the lower valve member.

Therefore, when the upper valve member and the lower valve member are rotated in opposite directions and screwed together, the rotational force of both valve members acts on the spring, causing the spring to twist.
The spring force is not evenly applied to the relief valve element, and the relief valve element may not be reliably seated on the relief valve seat.

In this case, the relief valve did not close and the valve body remained raised, leaving the main valve open and water was wasted.

<Problems to be Solved by the Invention> A problem to be solved by the present invention is to prevent twisting of the spring that occurs when the upper valve member and the lower valve member are screwed together.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is to configure the main valve corresponding to the main valve seat provided in the flash valve body, and to The valve body forming the pressure chamber is formed by screwing together an upper valve member that slides on the circumferential surface of the pressure chamber and a lower valve member that slides on the inner circumferential surface of the main valve seat. In the flush valve, a relief valve element that communicates the pressure chamber and the secondary side is disposed in a relief valve chamber formed between the relief valve chamber and a spring that presses the valve element toward the relief valve seat side. A spring receiver is rotatably fitted to the back surface of the upper valve member constituting the ceiling surface, and an engaging portion formed on the front surface of the spring receiver;
It is characterized in that both ends of the spring are engaged with stepped portions formed on the back surface of the relief valve body, and the spring is resiliently loaded between the two ends.

<Function> The function of the present invention is that when the upper valve member and the lower valve member rotate in opposite directions, the spring retainer functions as a slip washer by rotating the spring retainer relative to the upper valve member. This prevents the rotational force of the valve member from acting on the spring.

<Examples> The present invention will be described in detail below based on illustrated examples.

In the figure, A is the main body, 1 is its inlet, and 2 is its outlet. A main valve seat 4 is formed in a flow path 3 that connects these two ports 1 and 2.

Further, the main body A has openings 5 and 6 on the primary side of the flow path 3a facing the main valve seat 4, and on the secondary side of the flow path 3b in a direction perpendicular to the main valve seat 4. A cylindrical lid 7 is screwed onto the latter, and an operating handle 8 and a push rod 9 that moves forward and backward in communication with the operating handle 8 are attached to the latter.
Deploy.

10 is a valve body, an upper valve member 1 made of synthetic resin;
0a and a metal lower valve member 10b,
The valve body 10 is formed by screwing and connecting both 10a and 10b.

The upper valve member 10a is made of synthetic resin with low water absorption rate and good wear resistance, such as modified polyphenylene oxide resin, and the lower valve member 10a is made of
0b is made of brass.

The valve body 10 has a main valve body 11 and a guide vane piece 12 on a lower valve member 10b, and a sealing material 34 such as a U-packet is fitted around the upper part of the upper valve member 10a to the inner peripheral surface of the lid 7. , guide vane piece 12 of the lower valve member 10b
are arranged so as to be slidable on the inner peripheral surface of the main valve seat 4, and the upper valve member 10a of the valve body 10 and the lid 7 form a pressure chamber 13, and the main valve body 11 is attached to the main valve seat. 4 to constitute the main valve a.

Further, the upper valve member 10a of the valve body 10 has a control valve chamber 16 and a passage that communicate with the pressure chamber 13 via the control valve seat 14 and communicate with the primary side 3a via a bypass passage 15 provided at the bottom. Pressure chamber 13 via 17
and through the relief valve seat 18 to the secondary side 3
Relief valve chamber 19 and direct pressure chamber 1 connected to b.
A small passage (small hole) that connects 3 to the primary side 3a side
20 is provided.

Note that the small hole 20 is formed by an upper valve member 10a made of synthetic resin.
The small hole 20 may be formed directly in the upper valve member 10a, or a metal bushing having a small hole may be attached to the upper valve member 10a by insert molding or other methods.
may be formed.

The control valve chamber 16 has a control valve body 21 corresponding to the control valve seat 14 and forming a control valve b, and the relief valve chamber 19 has a relief valve corresponding to the relief valve seat 18 forming a relief valve c. The bodies 22 are respectively deployed.

The control valve body 21 is housed in the control valve body 16 with the valve shaft 23 provided on the upper surface inserted through the control valve seat 14 and facing the pressure chamber 13 side, and is placed above the small chamber 24 at the opening of the bypass passage 15. It is designed to ride on a step provided in the control valve body 21, and the peripheral surface of the control valve body 21 and the control valve chamber 1
There is a gap between it and the wall of No. 6, allowing water to pass through.

The diameter of the bypass passage 15 is about three times the diameter of the small hole 20, but its water passage area is made smaller than the water passage area when the control valve b is open.

The relief valve body 22 is integrally provided with a cylindrical guide member 25 on the lower surface, and this guide member 25
A sliding member 26 is slidably and non-removably attached to the inner peripheral surface or outer peripheral surface of the valve, and the guide member 25 and sliding member 26 loosely fit through the relief valve seat 18 to form a secondary valve. The sliding member 26 extends toward the side 3b, and is disposed in the relief valve chamber 19 so that the side surface of the sliding member 26 faces the tip of the push rod 9, and is constantly pressed toward the relief valve seat 18 by a spring 27.

The push rod 9 is supported by the support member 28 so as to be able to reciprocate and is elastically connected to the operating handle 8 by being pressed by a spring 29. When the operating handle 8 is pushed, the push rod 9 moves forward against the spring 29 and closes the relief valve body 2.
Press and release the second sliding member 26 to release the spring 29.
It returns to its original position with the force of the rebound. Further, the push rod 9 is formed so that its diameter gradually decreases toward the base over an appropriate length at the tip, thereby providing a recess 30 on the circumferential surface that becomes shallower as it approaches the tip.

The spring 27 is made of a coil spring, and is disposed in the relief valve chamber 19 behind the relief valve body 22, and has one end engaged with a stepped portion 22a formed on the outer periphery of the back surface of the relief valve body 22, and the other end of the spring 27 that is a coil spring. It comes into contact with the ceiling surface of the relief valve chamber 19, that is, the back surface of the upper valve member 10a of the valve body 10 via the receiver 31.

The spring receiver 31 is formed into a disk shape, and an engaging portion 3 engages the other end of the spring 27 with the outer peripheral edge of the front surface thereof.
1a, and a convex portion 31b having a spherical tip is integrally protruded from the center of the back surface, and the convex portion 31b is formed on the ceiling surface of the relief valve chamber 19, that is, on the back surface of the upper valve member 10a. It rotatably fits into the recessed portion _10a1 .

The strainer 32 is made of a cylindrical metal plate with countless small holes formed by etching, and is fitted onto the outer peripheral surface of the upper valve member 10a of the valve body 10 to form the valve body 10. By screwing the upper valve member and the lower valve members 10a and 10b, they are clamped and fixed from above and below to form the small hole 20 and the bypass passage 15.
and the primary side 3a.

As shown in FIG. 1, in the flush valve of the present invention constructed in this way, the main valve body 11 is normally pressed against the main valve seat 4, and the primary side 3a and the secondary side 3 of the flow path 3 are connected to each other.
The relief valve body 22 is pressed against the relief valve seat 18 by the spring 27, and the pressure chambers 13 and 2 are shut off.
The next side 3b is cut off, and the control valve body 21 sinks into the control valve chamber 16 due to its own weight.

Now, when the operating handle 8 is operated and the push rod 9 is pushed, the push rod 9 moves forward, resists the spring 27 and tilts the relief valve body 22 via the sliding member 26 and the guide member 25, and the relief valve seat 18 Release the valve further and open the relief valve c. Therefore, pressure chamber 13, passage 1
7. The water in the relief valve chamber 19 is released to the secondary side 3b, and as the pressure in the pressure chamber 13 becomes lower than the water pressure in the primary side 3a, the valve body 10 rises and the main valve body 11 is separated from the main valve seat 4 and the main valve a opens,
Water begins to flow from the inlet 1 to the outlet 2. At this time, the control valve body 21 is pushed up by the water pressure and pressed against the control valve seat 14, thereby closing the control valve b. (Figure 2).

Subsequently, as the valve body 10 rises, the sliding member 26 is pulled up and rides on the push rod 9,
When the guide member 25 and the sliding member 26 are slidable, the relief valve body 22 is pressed against the relief valve seat 18 by the spring 27, and the relief valve c is closed. At this time, since the push rod 9 has a concave portion 30 at its tip, the sliding member 26 falls by this amount, so it can reliably rest on the push rod 9, and the relief valve c closes. It becomes easier. On the other hand, just before the relief valve c closes, the valve shaft 23 of the control valve body 21 hits the adjustment screw 33 provided on the lid 7, and the control valve b begins to open.

Opening of control valve b and pressure chamber 13 from small hole 20
Water from the primary side 3a flows into the relief valve c.
is open, the water that has entered the pressure chamber 13 is discharged to the secondary side via the relief valve c, the valve body 10 continues to rise, and the sliding member 26 is further pulled up and removed from the push rod 9. Leave. (Figure 3).

Since the valve body 10 starts to descend after being completely raised, the inside of the pressure chamber 13 becomes negative pressure, and since the control valve b is open, the water on the primary side 3a passes through the valve and enters the pressure chamber 13 at the same time. Primary side 3a through small hole 20
Water flows into the pressure chamber 13 little by little (Fig. 4), and since the relief valve c is closed, the pressure chamber 13 is suddenly filled with water flowing in from the control valve b and the small hole 20. Increasing its volume, the valve body 10 rapidly descends. (Figure 5).

Then, when the valve body 10 descends to a certain position and the valve stem 23 of the control valve body 21 comes out of contact with the adjustment screw 33, the control valve body 21 is pushed up by the water pressure, so the control valve b is completely closed. After that, the valve body 10 slowly descends in response to the small amount of water that comes into the pressure chamber 13 only from the small hole 20. (Figure 6).

Finally, the valve body 10 comes down, the main valve body 11 is seated on the main valve seat 4, and the main valve a is completely closed. The control valve body 21 then sinks into the control valve chamber 16 due to its own weight, completing one operation and returning to the state shown in FIG. 1.

On the other hand, the sliding member 26 is seated on the push rod 9 as the valve body 10 descends, but the guide member 25 slides on the sliding member 26, so it descends together with the valve body 10 and closes the relief valve c. (Figure 6).

Thereafter, even if the push rod 9 is moved back, the sliding member 26 is only lowered and there is no change in operation.

<Effects of the Invention> Since the present invention has the above configuration, it has the following advantages.

When the upper valve member and the lower valve member rotate in opposite directions, by rotating the spring receiver relative to the upper valve member, the spring receiver functions as a slip washer, and the rotational force of both valve members acts on the spring. Therefore, twisting of the spring that occurs when the upper valve member and the lower valve member are screwed together can be completely prevented.

Therefore, the spring force is evenly applied to the relief valve element, and the relief valve element can be reliably seated on the relief valve seat, and the relief valve does not close like conventional valves, but instead remains raised.
There is no fear that the main valve will remain open, the relief valve and the main valve will surely close, and water will not flow out wastefully.

Since both ends of the spring receiver are engaged with the engaging portion on the front surface of the spring receiver and the stepped portion on the back surface of the relief valve body, the spring does not come off from both as the spring receiver or the relief valve body rotates.

[Brief explanation of the drawing]

The drawings show embodiments of the flush valve of the present invention, and FIGS. 1 to 6 are longitudinal cross-sectional views showing the operating state, and FIG. 7 shows an exploded state of the valve body, which is one of the components of the present invention. FIG. A...Flash valve body, a...Main valve, 4
...Main valve seat, 10...Valve body, 10a...Upper valve member, 10b...Lower valve member, 13...Pressure chamber, 1
8...Relief valve seat, 19...Relief valve chamber, 2
2...Relief valve body, 22a...Step part, 27...
Spring, 31... Spring holder, 31a... Engaging portion.

Claims (1)

[Claims] 1. A valve body that constitutes a main valve and forms a pressure chamber behind it corresponds to a main valve seat provided in the flash valve body, and an upper valve member that slides on the circumferential surface of the pressure chamber, and a main valve seat. A relief valve element that communicates the pressure chamber with the secondary side is installed in a relief valve chamber formed by screwing a lower valve member that slides on the inner circumferential surface of the valve member and between these two valve members. In the flush valve, which is disposed via a spring that presses the valve toward the relief valve seat side, a spring receiver is rotatably fitted to the back surface of the upper valve member that constitutes the ceiling surface of the relief valve chamber, and the front surface of the spring receiver is 1. A flush valve characterized in that both ends of the spring are engaged with an engaging portion formed on the surface of the relief valve body and a stepped portion formed on the back surface of the relief valve body, so that a spring is elastically mounted between the two.