JPH0252055B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in flush valves used in toilet bowls.

A flush valve used in a toilet bowl is installed in a valve chamber 1a of a valve box 1 to open and close a main valve port 2 provided in the valve box 1, as shown in FIG. The valve body a to be inserted into the valve chamber 1a is formed so as to open and close the valve port 2 while keeping the space between its outer periphery and the inner peripheral wall of the valve chamber 1a watertight.
The valve body a connects the primary chamber w side and the tertiary chamber y to the upper part of the valve body a.
A secondary chamber z side is formed to be separated from the secondary chamber z, and the valve body a is provided with an orifice 30 (small hole) that communicates the secondary chamber z with the primary chamber w. A sub-valve port 31 that communicates with the chamber y in a bypass manner is provided, and a bypass valve b is installed to open and close the sub-valve port 31.
has the bypass-like valve port 31 in its body 5.
The rod-shaped actuating member 5a is formed to penetrate through the valve body 1 and protrude long toward the tertiary chamber y side. Rod 40 and its Rod 40
The configuration includes a push button 41 for pushing the button 41, which allows the pressure-receiving area of the secondary chamber z of the valve body a to be larger than the pressure-receiving area of the primary chamber w by the amount of the valve port 2 under normal conditions. , the water flowing into the secondary chamber z side from the orifice 30 of the valve body a equalizes the water pressure between the primary chamber w side and the secondary chamber z side, so that the valve body a is connected to the main valve port 2. It is pushed out to the side, and the main valve port 2 is closed as shown in FIG. When the body 5 collides with the actuating member 5a, the valve seat 5b provided in the shape of a brim on the body 5 of the bypass valve b is separated from the valve seat 32 provided around the sub-valve port 31. , the secondary chamber z and the tertiary chamber y are in communication, and the water in the secondary chamber z flows out to the tertiary chamber y side, which has the same pressure as the atmospheric pressure, and the water in the secondary chamber z
As the pressure in the tertiary chamber y decreases to near the pressure in the tertiary chamber y, the valve body a moves toward the secondary chamber z to open the main valve port 2 due to the water pressure on the primary side, as shown in Figure 2. Water is discharged from the main valve port 2 to the tertiary room y side (toilet bowl side). Then, when the push button 41 is released, the bypass valve 32 returns to its previous position due to the bias of the spring 35, and the sub-valve port 31 is closed. As the pressure in the secondary chamber z increases due to the water flowing into the secondary chamber z through the valve, the valve body a is gradually pushed out toward the main valve port 2,
The main valve port 2 is closed to stop water discharge.

By the way, with the flush valve A constructed as above, the inside of the toilet where it is installed is inside a building but not a living space, so the temperature can drop to a temperature close to the outside temperature in winter. This may cause freezing accidents.

The present invention was made in order to prevent this flash valve freezing accident, and it is an object of the present invention to provide a new means for reliably preventing freezing without impairing the function of the flash valve. purpose.

For this purpose, in the present invention, the valve body installed in the valve box to open and close the main valve port has a
A sub-valve port is installed to connect the secondary chamber, which is separated from the primary chamber side by the valve body, to the tertiary chamber side in a bypass manner, and a bypass valve is installed to open and close the sub-valve port. In the flush valve, which is provided with an operating member for opening the bypass valve on the chamber side, the bypass valve has an opening communicating with the secondary chamber side and an opening opening opening to the tertiary chamber side. forming a hollow chamber comprising;
The chamber is provided with a valve port for controlling communication between the opening and the chamber, and a flash valve incorporating a thermostat and a valve controlled by the thermostat to open and close the valve port is provided.

Next, an example of implementation will be described in detail with reference to the drawings. Note that the same reference numerals as in the conventional means are used for constituent members having the same effect.

Figure 3 shows a flash valve A that can implement the present invention.
In this longitudinal side view, 1 is a valve box, 10 is a connecting tube on the inlet side, 11 is a connecting tube on the outlet side that connects to the toilet bowl, and 2 is a partition wall 12 provided to be the bottom wall of the valve chamber 1a. The main valve opening to be opened, a is the valve opening 2.
A main valve body provided in the valve chamber 1a to control opening and closing, z is a primary chamber w on the inlet side by the valve body.
y is a tertiary chamber formed below the partition wall 12 in which the valve opening 2 is opened, and 3 is a secondary chamber formed in the upper part of the valve chamber 1a so as to be partitioned from the above-mentioned valve opening 2 on the lower surface of the valve body a. 30 is an orifice provided in the valve body a to communicate the primary chamber w and the secondary chamber z;
1 is a sub-valve port provided at the axial center of the valve body a so as to communicate the secondary chamber z and the tertiary chamber y in a bypass manner;
5a is a bypass valve assembled to the axial center of the valve body a to open and close the sub-valve port 31; 5b is a valve seat provided in the body 5 of the bypass valve b in the shape of a brim so as to abut against the valve seat 32 around the sub-valve port 31; 35 is the bypass valve; 40 is a rod-shaped actuating member 5 of the bypass valve b;
The tertiary chamber y of the valve box 1 moves forward and backward from the side with respect to a.
A rod 41 mounted on the side represents a push button for pushing the rod 40 into collision with the rod-shaped actuating member 5a.

As a result, under normal conditions, the differential pressure between the primary chamber w side and the secondary chamber z side caused by the difference between the pressure receiving area on the primary chamber w side and the pressure receiving area on the secondary chamber z side of the valve body a is reduced. Therefore, the valve body a is held in the state in which the main valve port 2 is closed as shown in FIG. 3, and the push button 41 is pressed.
When the bypass valve b is tilted and the sub-valve port 31 is opened by pushing, the watertightness in the secondary chamber z is broken, the pressure in the secondary chamber z becomes zero (atmospheric pressure), and the above-mentioned differential pressure is reversed. Then, the water pressure on the primary chamber w side pushes the valve body a into the secondary chamber z side, opening the main valve port 2, thereby discharging water, and when the push button 41 is released, the secondary chamber z is opened again. This is the same as the conventional flash valve in that the internal pressure rises to push the valve body a to a position that closes the main valve port 2.

However, the valve box 1 is designed to open and close the main valve port 2.
As shown in FIG. 5, the bypass valve b assembled to the valve body a installed inside has a hollow body 5 including a rod-shaped actuating member 5a. A vertically long hollow chamber 50 is provided inside. And that hollow chamber 50
communicates with the secondary chamber z side through an opening 51 opened at the top of the body 5 of the bypass valve b, and also has a rod-shaped actuating member 5a that projects toward the tertiary chamber y side of the body 5.
Open ports 52, 52 are opened on the circumferential surface of the portion, and these open ports 52 communicate with the tertiary chamber y side.

An opening 51 provided at the top of the body 5 to communicate with the secondary chamber z is continuously provided with a small-diameter cylindrical portion that protrudes into the chamber 50, and the protrusion of the cylindrical portion A valve port 54 having a valve seat 53 on the periphery is formed at the end, and communication between the opening 51 and the chamber 50 is established by controlling opening and closing of the valve port 54 by a valve 55 facing the valve port 54. It is made to be controlled.

6 is a thermostat built into the chamber 50 to control the opening and closing of a valve 55 facing the valve port 54 according to temperature changes; the body 60 is filled with a temperature-sensitive material such as wax that expands and contracts with temperature changes; A guide cylinder portion 62 into which the piston 61 is inserted and removably inserted.
This is a conventionally known thermo-element in which the piston 61 is pushed out by an increase in the pressure of the temperature-sensitive substance due to an increase in temperature, and the piston 61 is pushed in by a decrease in the pressure of the temperature-sensitive substance due to a drop in temperature. The valve 55 is fixedly supported on the outer end of the body 60, and the valve 55 is inserted into the chamber 50 in a position facing the valve port 54, and the tip of the piston 61 protruding from the guide cylinder portion 62 is inserted into the chamber 50. The spring 63 inserted into the lower half of the body collides with the spring seat 64 that is pushed up, and the spring 65 pushes the body 60 downward, and the spring seat 64 is pushed up. The spring 63 is provided with a stopper 66 fixed to the body 5 of the bypass valve b at an intermediate position between the upper and lower sides in the chamber 50, and the upper surface side of the spring seat 64 is brought into contact with the lower surface of the stopper 66. The upper limit of the height position at which the catch seat 64 is pushed up is regulated.
As a result, at room temperature, the piston 61 is pushed out of the guide cylinder part 62 by the pressure of the temperature-sensitive substance, and the body 60 rises due to the reaction force pushing down the spring seat 64, thereby opening the valve 55. Benguchi 5
4, and when the temperature drops close to the freezing temperature, the pressure to push out the piston 61 decreases, causing the body 60 to release the spring 6.
5, the valve 55 is pulled away from the valve seat 53 and the valve port 54 is opened.

The thus constructed embodiment apparatus operates as follows.

When the temperature in the toilet in which the flush valve a is installed is higher than the freezing temperature, the thermostat 6 built into the bypass valve b presses the valve 55 against the valve port 54 provided in the body 5 of the bypass valve b. Since the valve port 54 is in the closed state, the bypass valve b acts in the same way as the bypass valve b of a normal flush valve, and therefore, the flush valve A can be turned off by pressing the push button 41. Let it be done.

Next, when the temperature inside the toilet drops to near freezing temperature, the thermostat 6 in the bypass valve B switches to the open port because the tertiary chamber y side of the flush valve A is open to the atmosphere through the toilet bowl. 52 and the flash valve A is also exposed to the atmosphere, the temperature of the thermostat 6 decreases due to heat conduction from the atmosphere and the flash valve A. The pressure pushing out the piston 61 decreases, and the body 60 of the thermostat 6 is pushed out by the spring 65, pulling the valve 55 away from the valve seat 53 and opening the valve port 54 as shown in FIG.

As a result, the secondary chamber z is brought into communication with the tertiary chamber y side via the opening 51, the hollow chamber 50, and the open port 52, and the water in the secondary chamber z flows into the opening 5.
1, the water flows through the chamber 50 and the opening 52 to the tertiary chamber y (toilet bowl) as shown by the arrow in FIG.

That is, inside the valve box 1 of the flush valve A, from the primary chamber w side communicating with the water faucet to the orifice 30 → secondary chamber z → opening 51 → chamber 50 → opening port 52 → tertiary chamber y
The water starts to flow in this order, and the temperature of the flowing water prevents the flash valve A from freezing. If the thermostat 6 rises due to the temperature of this outflowing water, the valve 55 is closed again by the operation of the thermostat 6, thereby stopping the outflow of water.

At this time, the opening degree of the valve port 54 due to the operation of the thermostat 6 is small, and therefore the amount of water in the primary chamber z flowing from the opening 51 through the chamber 50 and the opening port 52 to the tertiary chamber y side is greater than the amount of water in the secondary chamber z. When there is a large amount of water flowing into the secondary chamber z from the chamber w side through the orifice 30, the above-mentioned outflow of water is maintained at the state where it flows from the secondary chamber z through the inside of the bypass valve b and into the tertiary chamber y. However, as the temperature further decreases, the amount of contraction of the piston 61 of the thermostat 6 increases, which causes the valve port 54 to open wide, allowing air to flow from the secondary chamber z through the inside of the bypass valve b to the tertiary chamber y side. When the amount of water flowing out becomes larger than the amount of water flowing into the secondary chamber z side through the orifice 30, the pressure in the secondary chamber z decreases, and the valve body a The main valve port 2 is opened by being pushed into the secondary chamber z side by the water pressure on the w side, and water flows out from the opened main valve port 2, and the resulting large amount of water is released and cooled. Water that has not been frozen is supplied to the inside of flush valve A and to the piping to reliably prevent freezing. When the temperature of the valve box 1 of the flash valve A rises due to the outflow of this large amount of water, the thermostat 6 closes the valve 55 in the bypass valve b again, thereby reducing the pressure in the secondary chamber z. As the water rises, the valve body a performs a closing operation, and the water discharge stops.

As explained above, in the stop valve of the present invention, when the temperature drops, the bypass valve built in the valve body moves into the hollow chamber provided in the body of the stop valve and the thermostat built into the chamber. When the valve is activated, water is discharged through a communication path that connects the secondary chamber to the tertiary chamber, making it possible to prevent freezing without impairing the function of the flush valve. .

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of a conventional flush valve, Fig. 2 is an explanatory diagram of its operation, Fig. 3 is a longitudinal sectional side view of a flush valve according to the present invention, and Fig. 4 is an explanatory diagram of the same operation. , FIG. 5 is a longitudinal sectional view of the bypass valve same as above, and FIG. 6 is an explanatory view of the action same as above. Explanation of drawing symbols, A... Flash valve, a
...Valve body, b...Bypass valve, w...Primary chamber, y
...Tertiary chamber, z...Secondary chamber, 1...Valve box, 1a...
...valve chamber, 10...connecting cylinder part on the inlet side, 11...connecting cylinder part on the outlet side, 12...partition wall, 2...main valve port, 20...valve seat, 3...rubber sheet, 30
... Orifice, 31 ... Sub valve, 32 ...
Valve seat, 33... Spring, 40... Rod, 41...
Push button, 5...Body, 5a...Operating member, 5b...
... Valve seat, 50 ... Hollow chamber, 51 ... Opening, 52
...Opening port, 53...Valve seat, 54...Valve port, 55
... Valve, 6 ... Thermostat, 60 ... Body, 61 ... Piston, 62 ... Guide cylinder section, 6
3...Spring, 64...Spring catch, 65...Spring,
66...stopper.

Claims (1)

[Claims] 1 A sub-valve port is installed on the valve body installed in the valve box to open and close the main valve port, which allows the secondary chamber, which is separated from the primary chamber side, to communicate with the tertiary chamber side in a bypass manner. In the flash valve, a bypass valve is installed to open and close the sub-valve port, and an operating member for opening and operating the bypass valve is provided on the tertiary chamber side of the valve box. , forming a hollow chamber having an opening communicating with the secondary chamber side and an opening opening opening into the tertiary chamber side, and providing a valve port in the chamber for controlling communication between the opening and the chamber; A flash valve is also provided with a thermostat and a valve that opens and closes the valve port under the control of the thermostat.