JPH04160280A - Ball tap - Google Patents

Abstract

PURPOSE:To prevent to generate a fluctuation of the liquid level in a tank owing to the variation of the primary side pressure by providing a movable wall with the area matching to the water passing area of a valve seat, at the primary side in a main body opposing to a valve body, and connecting the movable wall and the valve body with a connecting rod while opening the rear side of the movable wall to the atmosphere. CONSTITUTION:To a bellows 3 provided being hung at the primary side of a flow passage concentrically with a valve seat 2, whose opening end is held by a lid 10 and a main body A, a pressure receiving surface 3a is composed by its closed end surface, and the inside of the bellows 3 is opened to the atmosphere through the ventilation hole 9 of the lid 10. The diameter of the pressure receiving surface 3a is formed almost same as the diameter of the valve seat 2, and the pressure receiving area of the bellows 3 has an area almost matching to the water passing area of the valve seat 2. To a metal fitting 11 projecting at the center of the pressure receiving surface 3a, a linear connecting rod 5 is connected by a pin 12. This connecting rod 5 penetrates the center of the valve seat 2, and furthermore, penetrates the main body A extending downward, and a valve body 4 is installed and fixed on the way of the connecting rod 5 at the part positioning at the large diameter part of the flow passage 1, and a float 13 is installed at the lower end of the connecting rod 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a ball tap used in a water supply tank for flushing toilet bowls and the like.

(Prior Art) Conventionally, ball taps with various structures are known, including the one disclosed in Japanese Utility Model Publication No. 59-26138, but basically, as shown in FIG. The piston-shaped valve body 4 placed on the secondary side of the valve A is moved up and down by the buoyancy of a float 13 that floats up and down as the water level in the tank B rises and falls to open and close the valve a. is adapted to act as a force that urges the valve body 4 in the valve opening direction. Therefore, the above conventional ball tap requires a large force to stop water, and in order to compensate for the lack of buoyancy of the float 13, the force is expanded by connecting the float 13 to the valve body 4 via the link 20 and the lever 21. It is intended to be transmitted to 4.

(Problems to be Solved by the Invention) The conventional ball tap described above requires a large float, a link connecting the float and the valve body, and a link because it requires a large force to stop water. Not only does the cost increase, but the area occupied by the ball tap within the tank also increases.

Moreover, in order to increase the flow rate, it is necessary to increase the seat diameter, but the required water stopping power is even greater, and it is difficult to increase the flow rate with a limited size such as a toilet flushing water tank. be.

In addition, since the valve body receives the pressure on the primary side as it is, when the pressure on the downstream side is high, the float that operates the valve body is required to have a correspondingly large buoyancy.In order to give the float a large buoyancy, the tank liquid On the other hand, when the primary side pressure is low, the buoyancy of the float is small, so the tank liquid level becomes low.The liquid level in the tank also fluctuates due to fluctuations in the primary side pressure, making it difficult to adjust the liquid level. Not only is this difficult, but the tank must also be sized to be large enough to accommodate fluctuations in liquid level in case the pressure on the primary side becomes high.

The present invention has been made in view of the above-mentioned problems of the prior art, and is small in size, low in cost, capable of large flow rates, and does not cause fluctuations in the liquid level in the tank due to fluctuations in the primary side pressure. Aims to provide no ball tap.

(Means for Solving the Problem) In order to achieve the above object, the ball tap of the present invention has the following features:
A movable wall having a pressure receiving surface with an area commensurate with the water flow area of the valve seat is provided on the primary side of the ball tap body so as to face the valve body, and the back of the movable wall is opened to the atmosphere, and the movable wall and the valve It is connected to the body using a connecting rod.

In the present invention, the movable wall generally refers to flexible movable walls such as bellows and diaphragms, and rigid movable walls such as pistons.

(Function) In the ball tap configured as described above, the pressure on the primary side applied to the valve body is offset by the pressure applied to the pressure receiving member.

(Example) Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, A is the ball tap main body, 6 is its inlet, and 7 is the discharge lower. The flow path 1 that connects the two ports 6 and 7 is provided with a vertical part in the middle thereof. .

The vertically formed portion of the flow path 1 has a larger diameter at the bottom, and a valve seat 2 is formed at the boundary portion so as to protrude downward toward the larger diameter portion along the hole edge on the smaller diameter portion side. ing.

Further, a movable wall 3 is provided on the primary side 1a of the flow path 1, and an opening 8 is provided coaxially with the valve seat 2, and a lid 10 having a ventilation hole 9 is screwed into the opening 8. be done. On the other hand, on the secondary side 1b of the flow path 1, a branch portion 18 to a hand washing pipe is provided.

In this embodiment, the movable wall 3 is made of a bellows, and its open end is held between the lid 10 and the main body A to connect the flow path to the primary side l! vertically installed coaxially with the valve seat 2.

The closed end surface of the bellows 3 constitutes a pressure receiving surface 3a, and the pressure receiving surface 3! The back portion, that is, the inside of the bellows 3 is exposed to the atmosphere through the vent hole 9 of the lid 10.

The diameter of the pressure receiving surface 31 is formed to be approximately the same as the diameter of the valve seat 2. That is, the pressure-receiving area of the bellows 3 has an area that is approximately in balance with the water-passing area of the valve seat 2.

A connecting rod attachment fitting 11 is protruded from the center of the pressure receiving surface 3M,
A straight rod-shaped connecting rod 5 is connected and attached to the metal fitting 11 by a pin 12.

The connecting rod 5 passes through the center of the valve seat 2 and extends downward through the main body A, and the valve body 4 is fixedly attached to a portion located in the large diameter portion of the flow path 1 in the middle of the connecting rod 5. , a float 13 is attached to the lower end.

The valve body 4 is fixed to the connecting rod 5 from the flow path secondary side 1b so as to correspond to the valve seat 2, and its upper surface is formed into a conical tapered surface, and the portion where it seats on the valve seat 2 has a Seat packing 14 is attached.

The float 13 is formed in a cylindrical shape, and a connecting rod attachment hole 15 with a female screw is provided in the shaft center portion of the float 13.
It is screwed onto a threaded portion 5a provided at the bottom. Therefore, the height of the float 13 can be adjusted.

In the figure, 16 is a slide guide that is integrally provided in the middle of the connecting rod 5 and slides on the inner periphery of the vertical part of the flow path 1 to guide the vertical movement of the connecting rod 5. 17 is a slide guide that guides the vertical movement of the connecting rod 5. When the connecting rod 5 comes into contact with the lower end of the slide guide 16,
In other words, it is a stopper that restricts the lowering of the valve body 4 and the float 13.

In the illustrated example, the slide guide 16 is formed in the shape of four blades, but if it is formed in the shape of a planar chrysanthemum, a noise prevention effect can be expected due to its rectifying action.

Therefore, such a ball tap is fixed to the side wall of tank B,
It is used by connecting a water supply pipe C to the inlet 6, and as the water level in the tank B rises and falls, the float 13 rises and falls to expand and contract the riverose 3, moving the connecting rod 5 up and down, and moving the valve element 4 to the valve seat 2.
The valve a is opened and closed by moving it toward and away from the valve body, but the primary pressure applied to the valve body 4 is canceled out by the pressure applied to the pressure receiving surface 3a of the bellows 3, and since there is no sliding seal in the bellows operation,
No sliding resistance is added to the operation of the valve body.

FIG. 4 shows a second embodiment, in which a diaphragm is used as the movable wall 3 instead of a bellows,
The diaphragm is clamped to the main body A by a lid 10 having a ventilation hole 9. The diaphragm has a through hole in the center, and the connecting rod 5 is inserted into the through hole with a nut to connect the diaphragm and the connecting rod 5. The other configurations are substantially the same as the first embodiment.

Further, FIG. 5 shows a third embodiment, and in this embodiment, a piston having a figure 7 seal 19 is used as the movable wall 3. The piston is integrated with the connecting rod 5. The other configurations are substantially the same as the first embodiment.

It goes without saying that in the second and third embodiments, the primary pressure applied to the valve body 4 is offset by the pressure applied to the movable wall 3, as in the first embodiment.

In each of the embodiments described above, the valve body 4 has a tapered upper surface, but it may of course be in the shape of a hand.

(Effects) Since the present invention is constructed as described above, it produces the following effects.

(1) The primary pressure applied to the valve body is offset by the pressure applied to the movable wall, so the force required to stop the water is small. Therefore, the float does not require large buoyancy, and links, levers, etc. There is also no need to use the valve body to magnify the force and transmit it to the valve body.

Therefore, it is not necessarily necessary to use links, levers, etc., and a small float can be used, making it possible to reduce the size and cost.

(2) Even when increasing the flow rate, it is possible to obtain a large flow rate without increasing the size by simply increasing the seat diameter and the pressure-receiving surface diameter of the movable wall at the same time, and the buoyancy of the float only needs to be proportional to the seat length. becomes.

(3) The primary side pressure applied to the valve body is offset by the pressure applied to the movable wall, so the buoyancy required to stop water is not affected by the primary side pressure fluctuation, and the tank It does not cause fluctuations in the internal liquid level.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a ball tap showing an embodiment of the present invention, showing a valve closed state. FIG. 2 is a sectional view taken along line nn in FIG. 1, and FIG. 3 is a sectional view showing the valve in an open state. FIG. 4 is a sectional view showing another embodiment, and FIG. 5 is a sectional view showing still another embodiment. FIG. 6 is a sectional view showing an example of a conventional ball tap. A: Ball tap 1a: Primary side 2: Valve seat
3: Movable wall 31: Pressure receiving surface 4: Valve body 5: Connecting rod

Claims (1)

[Claims] A movable wall having a pressure receiving surface with an area commensurate with the water flow area of the valve seat is provided on the primary side of the ball tap body so as to face the valve body, and the back of the movable wall is opened to the atmosphere, and the movable wall and the valve A ball tap characterized by connecting the body with a connecting rod.