JPS6321819Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a useful vacuum breaker that is installed coaxially in the water supply system of general flush toilets and particularly so-called simple flush toilets that flush with a small amount of water.

BACKGROUND ART A conventional vacuum breaker for a water supply system has a configuration in which it is branched off from the water supply system and disposed in a passage portion remote from the axis of the same system.

FIG. 7 shows a typical conventional vacuum breaker, which has a structure in which a branch passage 50 is protruded to form an intake port, an intake hole 51 is opened at the upper end of the passage 50, and an intake hole 51 is opened at the upper end of the passage 50. Valve 52 below 51
It has a built-in

Therefore, not only do the branch passages protrude into the water system, but there is also the inconvenience of having to check the direction of piping when inspecting and repairing the intake holes and valves.

Problems to be Solved by the Invention The problems to be solved by the invention are to construct the system so that it can be arranged coaxially in the middle of the water supply system.
To provide an epoch-making vacuum breaker for a water supply system that does not kill the flow of water passing through the breaker and does not depend on the direction of piping.

Means for Solving the Problems The means taken by the present invention to achieve the above-mentioned problems is a vacuum breaker for the water supply system that is arranged coaxially in the middle of the water supply pipe, and the breaker body is formed by an upper body and a lower body that can be separated, and the water inlet at the upper end of the upper body and the upper half channel on the lower side thereof, the lower half channel in the lower body and the water outlet at the lower end on the lower side thereof are coaxially centered. A generally ring-shaped space is formed around the outer periphery of the upper half channel and the lower half channel so as to communicate with both channels, and the upper wall forming this space communicates with the outside air. The intake hole is opened, and a ring-shaped valve membrane of the intake hole is provided in the same space so as to be able to swing from a closed upper body to an open state in response to low pressure on the waterway side.

Function The water inlet, upper half channel, lower half channel, and water outlet communicate with the water supply system vertically and coaxially from the water inlet side at the upper end to the water outlet side at the lower end, and form a straight line. It essentially becomes part of the water supply system and directs water straight through it.

The valve membrane closes the intake hole when water is continuously flowing through the waterway, and in the closed state, the water pressure applied through the ring-shaped space strengthens the closure and seals the intake hole. When the continuous flow of water is stopped, the movement of water that continues to flow downstream through the water outlet lowers the pressure in the waterway and creates a vacuum. Due to the pressure difference between the space and the intake hole side under atmospheric pressure, the valve membrane is pulled toward the low pressure side and swings to open the intake hole, allowing air to flow from the intake hole into the ring-shaped space and into the waterway, thereby closing the same space. And the inside of the waterway is adjusted to atmospheric pressure to prevent the occurrence of vacuum phenomenon.

In addition, the ring-shaped space applies water pressure evenly to the ring-shaped valve leaflet, ensuring the same degree of sealing of each part of the valve leaflet, and at the same time, it guides the airflow equally from the surroundings to the waterway during intake, causing turbulence. stop the flow.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

A in the figure is a vacuum breaker, and the breaker body A ₁ is formed by a state 1 and a lower body 2 that can be separated from a screw part 8, and a water inlet 6 at the upper end of the upper body 1 and an upper half channel on the lower side thereof. a, the lower half waterway b in the lower body 2, and the water outlet 7 at the lower end on the lower side of this
A vertically straight water flow path _B1 is formed coaxially and in communication with the upper and lower water channels A and B, and a roughly ring-shaped space C is formed on the outer periphery of the upper and lower water channels A and B. The upper wall 3, which surrounds and communicates with both waterways a and b, and which forms this space c, has an intake hole 4 that communicates with the outside air, and a ring-shaped valve membrane of the intake hole 4 is opened in the space c. 5 is provided so as to be able to swing from a closed state to an open state in response to low pressure on the water channels a and b sides.

A generally ring-shaped space c is provided on the outer circumferential side of the lower skirt portion 9a of the cylindrical partition wall 9 forming the waterway a, communicating with both waterways a and b, and being approximately concentric, and surrounding this space c. The upper wall 3 has air intake holes 4 opened at equal intervals in the circumferential direction. Moreover, the upper wall 3 in the ring-shaped space c
A roughly V-shaped projecting wall 10 is vertically disposed along the outer circumference of each intake hole 4, and a slope 10a facing the skirt portion 9a is formed along the inner peripheral surface of the projecting wall 10. The outer peripheral edge 5a of the valve leaflet 5 on the free side is in contact with the valve leaflet 5.

The roughly ring-shaped valve membrane 5 is made of flexible and elastic rubber.
The inner peripheral edge 5b is clamped and fixed between the upper wall 3 portion on the partition wall 9 side and a retaining ring 12 screwed into the threaded part 11 of the skirt portion 9a, and the outer peripheral edge 5a on the free side is fixed to the slope 10a. Intake hole 4 due to contact in the middle
is closed off to shut off the space C side and the outside side, and as the water pressure of water flowing through waterways a and b increases, it is pushed toward the intake hole 4 side along the slope 10a and strongly against the slope 10a. They are pressed together to seal the intake hole 4. In addition, the valve membrane 5 is reduced in pressure in both waterways a and b by the movement of water that continues to flow downstream through the water outlet 7 immediately after the flow of water to the water inlet 6 is stopped on the upstream side, so that the valve membrane 5 is in a vacuum state. As a result, the outer peripheral edge 5a swings away from the slope 10a due to the pressure difference between the evacuated ring-shaped space c communicating with the waterway and the air intake hole 4 side under atmospheric pressure. hand,
The intake hole 4 can be opened.

A reservoir chamber d is provided on the upper side of the upper wall 3 in communication with the ring-shaped space c side through the intake hole 4, and this reservoir chamber d also serves as a ventilation path, and when the valve is closed, a small amount of water temporarily enters the space. This is to prevent overflow when leaking from the c side through the valve membrane 5 and the intake hole 4.

Further, the upper opening of the storage chamber d is covered with a cover 14, leaving a vent hole 13, and the cover 14 is screwed onto the upper body 1 and its threaded portion 15 and integrated.

In the above embodiment, as shown in FIG. 5, the approximately ring-shaped valve membrane 5 has its outer peripheral edge 5a clamped and fixed between the upper and lower bodies 1 and 2, and the free inner peripheral edge 5b.
It is also optional to make it possible to close the cap by contacting the slope 10a of the skirt portion 9a and to open the cap by swinging.

In this case, the outer peripheral edge 5a of the valve leaflet 5 also serves as a packing for blocking and sealing the space c side and the threaded portion 8 communicating with the outside. Then, the inner peripheral edge 5b relative to the slope 10a at a certain degree of opening during intake
The swing rate of the valve membrane 5 is smaller than the swing rate of the valve membrane 5 in the embodiment shown in FIG. Therefore, the inner peripheral edge 5b is on the slope 1.
Don't hit 0a and make noise.

Further, the thickness of the outer circumferential edge 5a or the inner circumferential edge 5b that contacts the slope 10a may be made thinner toward the tip end.

As a result, the vacuum breaker A of the present invention
When installed in the flush system B of not only a general flush toilet device but also a flush type simple flush toilet device C shown in FIG. The cleaning water supplied through the valve D can pass through the water system path _B1 without losing its water force, and as the water supply is stopped by the same valve D and the water system path _B1 becomes low pressure, its atmospheric pressure decreases. Due to the difference, the approximately ring-shaped valve membrane 5 swings to open the intake hole 4, and outside air flows into the water flow path _B1 from the intake hole 4, so that no vacuum phenomenon occurs.

Effect of invention Therefore, the present invention has the following advantages.

On the inside, there is a water flow element consisting of a linear water inlet, an upper half waterway, and a lower half waterway outlet, and on the outer periphery there is a vacuum prevention element consisting of a roughly ring-shaped space, a roughly ring-shaped valve membrane, and an intake hole. By being arranged in a shape, the external appearance does not have branch-like protrusions like conventional products, and the installation work is significantly simplified and improved regardless of the azimuth during piping.

A straight water flow path from the water inlet to the water outlet is essentially integrated as a part of the straight water supply system, allowing water to be guided and passed through without destroying the flow force, and under low pressure conditions. Air intake is guided evenly around the waterway from the ring-shaped space around its outer circumference,
Vacuum phenomena can be stopped instantly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the vacuum breaker for water supply systems of the present invention. FIG. 2 is a cross-sectional plan view taken along the - line. 3 and 4 are partially enlarged sectional views of the valve mechanism, with FIG. 3 showing the valve closed state and FIG. 4 showing the valve open state. FIG. 5 is an enlarged sectional view of main parts based on another embodiment. FIG. 6 is a usage diagram showing the vacuum breaker of the present invention incorporated into a simple flush toilet device. FIG. 7 is a front view showing a conventional example with a portion cut away. In the figure, _A1 is the breaker body, a is the upper half channel,
b is a lower half channel, c is a roughly ring-shaped space, 1 is an upper body, 2 is a lower body, 3 is an upper side wall, 4 is an intake hole, 5 is a ring-shaped valve membrane, 6 is a water inlet, and 7 is a water outlet.

Claims (1)

[Scope of utility model registration request] It is a vacuum breaker for water supply systems that is arranged coaxially in the middle of a water supply pipe, and the breaker body is formed of a separable upper body and a lower body, and there is a water inlet at the upper end of the upper body and a water inlet on the lower side of the breaker body. The upper half channel, the lower half channel in the lower body, and the water outlet at the lower end on the lower side thereof are provided coaxially and in communication, and a ring-shaped ring is formed around the outer periphery of the upper half channel and the lower half channel. A space is surrounded and communicated with both waterways, an intake hole communicating with outside air is opened in the upper wall forming this space, and a ring-shaped valve membrane of the intake hole is closed in the space under low pressure on the waterway side. A vacuum breaker for a water supply system that can swing from the open state to the open state.