JPH09203475A - Flush valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always attach and remove a freeze preventing member from the indoor side. SOLUTION: When a retaining screw 62 is screwed into a cap 47, a valve packing 49 is separated from a valve seat part 45a so as to communicate a flow inlet part 42 with a flow outlet port 43. Accordingly, water pressure in a pipe line is applied to a push-rod piston through the intermediary of a pressure conducting pipe so that a push rod is advanced, pressing a valve shaft 19 which tilts the piston main valve. Accordingly, the piston main valve is opened, allowing water to pass through the flow outlet port, and accordingly, a water supply pipe, a flush valve, a toilet stool, a water discharge pipe and the like are prevented from being frozen. The retaining screw 62 is turned so as to adjust the push-in depth thereof in the cap 47 so as to set the opening degree of the piston main valve to a minimum value necessary for preventing freezing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush valve device for supplying flush water to a flush toilet and the like, and more particularly to a hydraulic control flush device for activating a start valve of a flush valve body by utilizing a water supply pressure. Regarding the valve device. More specifically, the present invention relates to a flash valve device equipped with a mechanism for preventing freezing in cold regions.

[0002]

2. Description of the Related Art An example of a hydraulic control type flash valve device configured to operate a start valve by using a water supply pressure will be described with reference to FIG.

A flush valve body 1 is provided in the middle of a pipe connecting the main plug 2 and a toilet bowl (not shown). A pipe 5 between the water stopcock 4 provided on the upstream side of the flush valve body 1 and the main tap 2 has a branch portion 6, from which a pipe for introducing water pressure (hereinafter referred to as a conduit). The pressure pipe 7 is diverged, and the flash valve body 1 is branched.
It is connected to the.

The feed water pressure in the pipe 5 is used to open the starting valve in the flush valve body 1.
Are used to introduce feedwater pressure. An operation valve device 8 for controlling the water supply pressure is provided in the pressure guiding pipe 7. The operation valve device 8 has a lever-shaped operation piece 9 as an operation member, and when the operation piece 9 is pushed in, the water supply pressure in the pipe 5 causes the water pressure in the flush valve body 1 to operate the start valve. Is being led to.

Reference numeral 10 in FIG. 3 is a vacuum breaker.

Next, the structure of the flash valve body 1 will be described with reference to FIG.

The valve casing 11 has an inlet 12 and an outlet 13, and a piston main valve 14 is provided between them. The water supply pipe 15 connected to the inflow port 12 is
(Not shown in FIG. 4). The piston main valve 14 has an inner hole 14a vertically passing through the inside,
A sleeve-shaped piston guide 16 is screwed to the lower end thereof.

A starting valve 18 is inserted in the inner hole 14a of the piston main valve 14, and a valve shaft 19 of the starting valve 18 is inserted through the piston guide portion 16 and extends downward. . In the inner hole 14a of the piston main valve 14, a seat portion on which the starting valve 18 is seated is provided so as to protrude from the inner peripheral wall, and a rubber packing 20 is provided on the upper surface side.
The piston main valve 14 is also seated on the main valve seat 21a via the rubber packing 21.

A compression coil spring 22 is arranged on the upper surface of the valve head of the starting valve 18 to bias the starting valve 18 downward.
The upper end of the coil spring 22 is fixed by a receiving nut 23 screwed on the upper part of the inner hole 14a.

A water passage hole 24 is formed in the side surface of the piston main valve 14. The receiving nut 23 is provided with a pilot small hole 25 for introducing pilot water into the pilot water chamber A above the receiving nut 23.

A strainer 26 is mounted on the outer peripheral surface of the piston main valve 14. A packing 27 is fitted on the outer peripheral surface of the upper part of the piston main valve 14.

A cylinder 32 is inserted into the peripheral surface of the lower portion of the flash valve body 1 from the outside. The cylinder 32 is fixed by a sleeve 30 screwed to the flash valve body 1. This cylinder 3
A push rod piston 31 for activating the activation valve 18 is inserted into the inside of the piston 2. The pressure guiding tube 7 is connected to the sleeve 30.

The push rod piston 31 is urged toward the sleeve 30 by a spring 33 provided in a cylinder 32. The push rod piston 31 is provided with a small-diameter water hole 39. The cylinder 32 has an opening 35 for water passage,
36 are provided.

A push rod 38 is connected to the push rod piston 31, and the push rod 38 contacts the valve shaft 19 of the starting valve 18,
The starting valve 18 can be tilted.

Next, the operation valve device 8 will be described with reference to the longitudinal sectional view of FIG. 5 and the enlarged sectional view of the essential parts of FIG.

The valve casing 41 has an inlet 42 and an outlet 43, and a valve assembly 44 is provided between them. The valve assembly 44 includes a cylinder 4
5 and a piston valve 46. The piston valve 46 is slidably fitted in the cylinder 45.

A cap 4 is provided at one end of the piston valve 46.
The cap 47 projects outside the operation valve device 8. A compression spring 48 is provided between the inside of the cap 47 and the end of the cylinder 45. A valve packing 49 is attached to the other end of the piston valve 46. Therefore, the valve packing 49 is seated on the valve seat portion 45a provided at the end of the cylinder 45 by the urging force of the spring 48.

A decorative cover 51 is attached to the valve casing 41 of the operation valve device 8 with screws 50, 50. A mounting base 53 for the operation piece 9 is provided on the upper part of the decorative cover 51, and the operation piece 9 is rotatably mounted by a pivot 54. On the back side of the operation piece 9, a press portion 55 that comes into contact with the cap 47 of the piston valve 46 is protruded.

A U packing 5 is provided on the outer circumference of the piston valve 46.
The piston valve 46 is fitted in a watertight manner on the inner surface of the cylinder 45. Cylinder 4
5 is provided with a water passage hole 57. Piston valve 4
6, a portion facing the water passage hole 57 is a small diameter portion 46a.
A space 58 is formed between the outer peripheral surface of the piston valve 46 and the inner peripheral surface of the cylinder 45. An inflow hole 59 is provided in the inner portion of the inflow port 42 of the valve casing 41, and the inflow port 42 communicates with the void portion 58.

When the operation piece 9 is pushed and the piston valve 46 is pushed in, the valve packing 49 provided at the other end of the piston valve 46 is separated from the valve seat portion 45a. Further, the small diameter portion 46a is the valve seat portion 4 in FIG.
Move to reach around 5a. Then, the inflow port 4 passes through the inflow hole 59, the water passage hole 57, and the void 58.
2 communicates with the outlet 43. Therefore, the high water supply pressure in the pipe 5 applied to the inflow port 42 via the pressure guiding pipe 7 is also applied to the downstream side of the outflow port 43.

In the flush valve body 1 and the operation valve device 8 thus constructed, when the operation piece 9 is pushed in, the high water supply pressure in the pipe 5 and the pressure guiding pipe 7 is applied to the water pressure chamber B as described above. . Then, the push rod piston 31 and the push rod 38 move forward to tilt the starting valve 18. As a result, the pilot water chamber B above the piston main valve 14
The internal water pressure passes through the inner hole 14a of the piston main valve 14 and flows into the downstream outflow chamber D.

As a result, the water pressure balance between the inflow chamber E on the upstream side of the piston main valve 14 and the pilot water chamber A is disrupted, and the piston main valve 14 is pushed up and opened by the water supply pressure in the inflow chamber E. The water supplied from the inflow port 12 flows out from the inflow chamber E through the outflow chamber D toward the toilet bowl.

When the operation piece 9 is released, the piston valve 46 is retracted by the urging force of the spring 48, and the valve packing 4
9 is seated on the valve seat portion 45a. Then, piping 5
The water supply pressure in the pressure guiding pipe 7 is not transmitted to the hydraulic chamber B of the flash valve main body 1. And push rod piston 31
The push rod 38 is pushed back by the spring 33. At this time, the water in the hydraulic chamber B flows out to the outflow chamber D through the water hole 39 of the push rod piston 31.

With the backward movement of the push rod 38, the starting valve 18 returns from the inclined posture to the standing posture and sits on the packing 20. Thereby, the communication between the pilot water chamber A and the outflow chamber D is shut off. Then, the water passing through the strainer 26 gradually flows into the pilot water chamber A through the water holes 24, the inner holes 14a and the pilot small holes 25, and the water pressure causes the piston main valve 14 to be gradually pushed down, and eventually. The piston main valve 14 is seated on the valve seat 21a to close the flow of the washing water.

Although the operation piece 9 is provided in FIGS. 3 to 6, the operation piece 9 is omitted and the cap 47 is provided.
A flash valve device in which is directly pressed with a fingertip is also widely used. In this case, the cap 47 functions as an operating member.

When such a flash valve device is installed in a cold region, if water does not flow, a valve, a water supply pipe,
Freezing may occur in toilet bowls, drains, etc.

In order to prevent such freezing, Japanese Utility Model Laid-Open No. 4-77671 discloses a flash for cold regions provided with a stopper for preventing the piston main valve 14 from seating on the main valve seat portion 21a. Valves have been proposed.

[0028]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the cold bulb flush valve disclosed in Japanese Patent No. 71, since the stopper is configured to be screwed directly into the flush bulb body, it can be applied only when the flush bulb body is placed in a room such as a toilet room. .
That is, if the flush valve body is installed on the back of a wall or the like, the stopper cannot be attached to the flush valve body.
It is also possible to leave the stopper attached to the flash valve body, but if you do this,
Even when the temperature is high such as in summer, the water will be left unattended.

It is an object of the present invention to provide a flash valve device in which the antifreezing member can be always attached and detached from the indoor side.

[0030]

According to a first aspect of the present invention, there is provided a flush valve device for opening and closing a main flow passage extending from an inlet of a feed water to an outlet thereof, and a starting valve for activating the main valve. And a flush valve main body including a push rod for pushing and tilting the starter valve with its tip portion, and a water pressure chamber for applying water pressure to the push rod in the forward direction; a water supply pipe connected to the inflow port And a pipe for introducing water pressure connecting the water pressure chamber; and an operation valve device provided in the middle of the pipe for opening and closing a flow passage in the pipe, wherein A valve seat portion provided, an operation valve body seated on the valve seat portion, a spring for urging the operation valve body in a seating direction, and an operating member for pressing the operation valve body in a seating direction. An operation valve device comprising: a flash valve device comprising: In order to prevent seating of the body and to constantly apply water pressure to the push rod to tilt the start valve so that water always flows out from the flush valve body, the press member for pressing the operation member is the operation valve. It is characterized by being provided in the device.

In the flash valve device having such a structure, when the operating member is pressed by the pressing member, the operating valve device is always opened. As a result, water pressure is applied to the push rod, the push rod moves forward, and the start valve is tilted. As a result, the flush valve body is always open, and water always passes through the flush valve body. From where water always flows like this,
Freezing of the flush valve body, water supply pipes connected to it, toilet bowls, drain pipes, etc. is prevented.

According to the first aspect of the present invention, the pressing member is composed of a pressing metal fitting that can be attached to and detached from the operating valve device, and a pressing screw that is screwed to the pressing metal fitting and presses the operating member. Adjusting the pushing amount of the operating member,
The water pressure applied to the push rod can be reduced to reduce the amount of forward movement of the push rod. As a result, the inclination of the starting valve can be reduced, the amount of water passing through the flush valve body can be minimized, and water can be saved.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a vertical sectional view showing the configuration of an operation valve device 8A used in the embodiment of the present invention, and FIG. 1 (b) is a perspective view of a holding member.

The operation valve device 8A differs from the operation valve device 8 of the conventional flash valve device only in that the holding member 60 is attached to the decorative cover 51.

The holding member 60 is composed of a substantially Ω-shaped holding metal fitting 61 and a holding screw 62 screwed into a female screw hole 63 of the holding metal fitting 61. The retainer fitting 61 includes a leg piece portion 61 a that overlaps the decorative cover 61, and a U-shaped portion 61 b that crotches the cap 47. In this embodiment, the holding metal fitting 61 is fixed to the decorative cover 51 by inserting the screw 50 for mounting the decorative cover 51 through the opening 61c of the leg piece portion 61a. A female screw hole for mounting the pressing metal fitting, which is different from the hole for the pressing metal fitting 50, may be formed, and the pressing metal fitting may be fixed to the decorative cover 51 with a bolt for mounting the pressing metal fitting.

The other construction of the operation valve device 8A is the same as that of the conventional operation valve device 8 described above, and the same reference numerals indicate the same parts.

Further, the construction of the flush valve main body in which the operation valve device 8A is incorporated is the same as the conventional one.

In this operation valve device 8A, when the cap screw 62 screwed into the female screw hole 63 of the U-shaped portion 62b is advanced and the cap 47 is pushed in, the valve packing 49 is separated from the valve seat portion 45a. Then, the inflow port 42 and the outflow port 43 communicate with each other.

As a result, the water pressure in the pipe 5 is applied to the push rod piston 31 via the pressure guiding pipe 7, the push rod 38 moves forward, and the push rod 38 pushes the valve shaft 19 to tilt the piston main valve 14. Then, the piston main valve 14 opens, water flows from the inflow port 12 to the outflow port 13, and the freezing of the water supply pipe, the flush valve, the toilet bowl, the drain pipe, etc. is prevented.

At this time, the cap screw 62 is turned to turn the cap 4
It is preferable to adjust the pushing depth of No. 7 so that the opening amount of the piston main valve 14 (the amount of water passing through the flush valve body 1) is set to the minimum amount necessary for preventing freezing.

In this embodiment, the push rod piston 31 is also provided with a small-diameter water passage hole 31, and the cap 47 is pushed into the push rod piston 31 from the pressure guiding pipe 7.
When water pressure is applied to the water, the water in the pressure guiding pipe 7 passes through the water passage hole 31 and flows out to the outflow port 13. Therefore, freezing of water in the pressure guiding pipe 7 and the operation valve device 8A is also prevented.

FIG. 2 is a perspective view showing a holding member 60A used in another embodiment. This pressing member 60A
Is composed of a hat-shaped holding metal fitting 64 and a holding screw 62 screwed into a female screw hole 65 of the holding metal fitting 64. By screwing in the holding screw 62, the holding member 6
The cap 47 can be pushed in like 0.

Incidentally, instead of the metal pressing fittings 61, 64, a synthetic resin member having the same shape as these may be used.

In the above-mentioned embodiment, the cap 47 is directly pressed by the pressing screw 62. However, when the operation piece 9 is provided as shown in FIGS. 3 to 6, the operation piece 9 is pressed. You may make it hold down with a screw.

[0045]

As described above, according to the present invention, it is possible to prevent freezing of the hydraulic control type flash valve device. In this flush valve device, since the pressing member for constantly flowing water is attached to the operation valve device, the pressing member can be always attached to and detached from the operation valve device from the indoor side. Therefore, the pressing member can be attached only when the anti-freezing measure is required such as in the severe cold season, and the attaching / detaching operation of the pressing member is extremely easy.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a control valve device of a flush valve device according to an embodiment and a perspective view of a holding member.

FIG. 2 is a perspective view showing another holding member.

FIG. 3 is an overall view of a flash valve device.

FIG. 4 is a vertical cross-sectional view of a flash valve body.

FIG. 5 is a vertical sectional view of a conventional operation valve device.

6 is an enlarged cross-sectional view of a main part of the operation valve device of FIG.

[Explanation of symbols]

 1 Flash Valve Main Body 2 Main Plug 4 Water Stopper 6 Branch Port 7 Pressure Guide Tube 8, 8A Operation Valve Device 9 Operation Piece 14 Piston Main Valve 41 Valve Casing 44 Valve Assembly 45 Cylinder 45a Valve Seat 46 Piston Valve 60, 60A Holding Member 61 , 64 Presser bracket 62 Presser screw

Claims (2)

[Claims] 1. A main valve for opening and closing a main flow path from an inflow port to an outflow port of a feedwater, a start valve for starting the main valve,
A push rod for pushing and tilting the start valve at the tip,
A flush valve body comprising a water pressure chamber for applying water pressure to the push rod in the forward direction; a water pressure introducing pipe connecting the water supply pipe connected to the inflow port and the water pressure chamber;
And an operation valve device provided in the middle of the pipe for opening and closing a flow passage in the pipe, wherein a valve seat portion provided in the flow passage and an operation for seating on the valve seat portion A flash valve device comprising a valve body, a spring for urging the valve body in the seating direction, and a valve operating device for pressing the valve body in the seating direction. In order to prevent the operation valve body from being seated and to constantly apply water pressure to the push rod to incline the start valve, so that water always flows out from the flush valve body, the presser foot that holds down the operation member is pressed. A flush valve device, wherein a member is provided in the operation valve device. 2. The pressing member according to claim 1, wherein the pressing member is composed of a pressing metal fitting that can be attached to and detached from the operating valve device, and a pressing screw that is screwed to the pressing metal fitting and that pushes in the operating member. And a flash valve device.