JPS59140983A - Ball tap for water storage tank - Google Patents

Abstract

PURPOSE:To prevent the occurrence of noise and the abrasion of a flexible section of a diaphragm, by forming the inner surface of a lid member with a suitable number of projections surrounding a pilot passage formed in a lid member in opposite to the diaphragm. CONSTITUTION:A pressure chamber 2 is communicated with the outside of a main body through a small diameter pilot passage 3 formed through the top center of a lid member 4 having the inner surface formed thereon with a suitable number of projections 5 surrounding the pilot passage 3 and the outer surface formed thereon with a projecting pilot valve seat 19 in the opening edge part of the pilot passage 4. Accordingly, upon opening of a main valve a diaphragm 1' which is the main valve, closely contacts with the inner surface of the lid member to keep the pilot passage 3 from being blocked, and the diaphragm 1' is not pushed back toward a main valve seat 4 unless a pilot valve is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ball tap for a water tank, and particularly to a pilot-type ball tap for a water tank that uses a diaphragm as the main valve element.

As this type of ball tap for a water tank, the one shown in FIG. 4 and disclosed in Japanese Patent Publication No. 48-33425 is known.

To explain the one in Fig. 4, an opening (4) formed in the main valve seat (10) concentrically with the main valve seat (10) with a concave inner surface (4) is attached to the main valve seat (10). The diaphragm (1), which serves as the main valve body (1) that responds to seat noise, is clamped and fixed between the lid member (4) and the main body (2), and the diaphragm (1') and the lid member (4) form a pressure chamber. (2) is formed.And,
The inner top surface of the lid member (4) is formed as a flat surface with no local unevenness, and a float (C) is attached to the center of the top surface in conjunction with the vertical movement of the float (C) as the water level in the water tank rises and falls. A pilot flow path (3) is provided that communicates the pressure chamber (2) with the outside of the main body (4) via a pilot valve (b) that opens and closes.

Further, the diaphragm (1) has a small passageway (11'I) that communicates with the pressure chamber (2) and the next side of the flow path, and the rear side thereof is formed into a flat shape except for the flexible part. .

Therefore, in the above conventional valve, when the valve is opened, the diaphragm comes into close contact with the inner surface of the lid member and blocks the pilot flow path, but due to the inflow of water into the pressure chamber from the small passage, the diaphragm separates from the inner surface of the lid member and the pilot flow path is closed. When the flow path is opened and the water in the pressure chamber is drained from the pilot flow path, the operation of coming into close contact with the inner surface of the lid member and closing the pilot flow path is repeated.

In other words, the diaphragm vibrates and a vibration noise is generated due to wear.
Problems such as wear and tear of the flexible portion of the diaphragm arise.

SUMMARY OF THE INVENTION Accordingly, the present invention aims to solve the above-mentioned problems and prevent the generation of noise and the wear and tear of the flexible portion of the diaphragm.

To achieve the above object, the present invention has a structure in which a pilot-type water tank ball tap having a diaphragm as the main valve body forms a pressure chamber together with the diaphragm, and a lid that forms a pilot flow path opposite to the diaphragm. By forming an appropriate number of protrusions on the inner surface of the member so as to surround the pilot flow path, the diaphragm is prevented from coming into close contact with the inner surface of the lid member and blocking the pilot flow path.

Hereinafter, an example of the implementation of the present invention will be explained based on the drawings.) In the drawing, (4) is the main body of the pole tap, and the inflow part (6), the outflow part (7), and the internal parts (6) and (7). An opening (9) opening at the front of the main body (A) is formed in the middle of the main passage (8), and a diameter smaller than that of the opening (9) is formed in the middle of the main passage (8). A main valve seat αQ is formed concentrically with the opening (9).

In the opening (9), there is a main valve body (a) that constitutes the main valve (a) corresponding to the main valve seat α1, and a lid member (4) made of synthetic resin such as polyacetal resin. It will be installed.

The main valve body consists of a diaphragm (1) formed into a disk shape and filled with reinforcing cloth α force on the entire surface, and an opening (9) in the main valve body.
), the peripheral edge is held between the step (b) provided on the inner peripheral surface of the opening and the lid member (4), and corresponds to the main valve seat from the primary side.

The diamond slam (1) has a peripheral edge (la) sandwiched between the lid member (4) and the step (b) on the inner peripheral surface of the opening (9) and a central portion (1b) formed within the thickness. and both parts (xa) (
The annular portion sandwiched between the main body (4) is formed to be thin so as to be easily deformed and constitutes a flexible portion (IC), and the flexible portion (IC) has a concave shape facing inward of the main body (4). It is set loose.

The thick walled part (1b) at the center of the diaphragm (υ) is formed to have a larger area than the main valve seat OI, and the main valve (a)
j3j valve, that is, when the diaphragm (1) comes into close contact with the main valve seat α1, the peripheral edge is appropriately moved outward from the width main square seat OI in a protruding shape, and a reinforcing plate q1 is provided on the back side thereof. (remove)

The reinforcing plate I is made of synthetic resin such as P, P, 0 resin or A, B, S resin.
It is formed into a disk shape with approximately the same diameter as b), and the stator attachment hole 04 is provided in the center part in a cylindrical shape that protrudes toward the back side. Portion (lb)
Place the diaphragm (1) along the back surface (ti
The diaphragm (1) is attached to the diaphragm (1) through the stator Q which passes through the center of the diaphragm (1).

Still, the reinforcing plate (li) penetrates the diaphragm (1) in front of the part of the main valve seat αQ that is displaced outward when the thick part (1b) at the center of the diaphragm (1) is in close contact with the main valve seat. A shaft portion a→ is formed to protrude, and a small passage αη in the form of a small hole is provided through the shaft portion αQ.

The stator (11) is made of synthetic resin such as A, B, S resin, etc., and is formed into a screw shape whose head diameter is approximately the same as the inner diameter of the main valve ff1Q□, and the diaphragm (1) is The tip is traced from the front side and inserted into the stator attachment hole 0 of the reinforcing plate 01, and then ultrasonically welded or thermally welded to the paper part.

On the other hand, the aforementioned plate member (4) is fitted into the opening (9) and fixed to the opening (9) by means of a cap nut screwed onto the outer periphery of the opening (9).

Further, the lid part shrine (4) has a concave surface on the side facing inward of the main body (4), and forms a pressure chamber (2) behind the diaphragm (1) together with the diaphragm (1').

The lid member (4) has a small diameter pilot flow path (
3), and communicates the pressure chamber (2) with the outside of the main body (4) via the pilot flow path (3), and an appropriate number of holes are formed on the inner surface surrounding the pilot flow path (3). protrusion (5
), and on the outer surface side, a pilot valve seat groove is formed in a protruding shape at the opening edge of the pilot flow M (3).

The lid member (4) is provided with a lever attachment part (E) on its outer surface, through which the barrel is inserted and extends outward.

The protrusion (5) on the inner surface of the lid member (4) has a diaphragm (
1) bends toward the lid member (4) and approaches the inner surface of the lid (4), the cylindrical mouth edge α of the stator attachment hole a4 provided in the reinforcing plate α on the back surface of the diaphragm (1) It is provided so as to correspond to the spoon and receive and lock it.

In addition, the lever attachment part α) on the outer surface of the noble member (4) is connected to a pair of support arms (2
Oa) is provided, and a lever lever is pivotally connected to the support arm (20a).

The lever lever (C) is made of synthetic resin such as polyacetal resin or hard polyethylene resin, and has its rear end pivotally connected to the support arm (20a), and its upper part protrudes upward to form a rear end surface. shows a pilot valve body (g) that corresponds to the pilot valve seat 0I and constitutes the pilot valve (b).
will be established.

The pilot valve body (c) is installed by fitting an elastic body made of rubber into a hole recessed in the rear end face of the lever lever ρ. The pilot valve seat (11) is moved toward and away from the pilot valve seat (11) by 90 turns to open and close the pilot valve (b).

Namely 1. Pilot valve body t? -1, when the tip of the lever Q force rotates downward, it moves from the pilot valve seat to open the pilot valve (b), and when it rotates upward, it touches the pilot valve seat (6) closely. and pilot valve (b)
Close.

However, the lever Q]) has a float mounting hole (c) installed at its tip that passes through it vertically in the vertical direction9.
Screw the mounting shaft (c) protruding from the float (c) onto the float (c) and attach the float (c) to 1! Attach l.

Therefore, in this water tank ball tap, when the water level in the water tank decreases and the float goes down, the tip of the lever Q-metal rotates downward and the pilot valve (b) opens, opening the pressure chamber (2).
The water inside will be drained.

Then, the pressure on the next side of the main flow path (8) becomes much higher than the pressure in the pressure chamber (2), and this pressure pushes the main valve element (1) away from the main valve seat 0 (), causing the main valve ( The valve a) is opened, and the water on the negative side flows to the secondary side and is discharged from the outlet (7).

At this time, the main valve body (1), that is, the diaphragm (1) is moved by the pressure of the main flow 1Nr (8) - the next side pressure chamber (2) 11!
1 as the cylindrical hole edge 04 of the stator attachment hole 04 of the reinforcing plate Q1 comes into contact with the protrusion (5) on the inner surface of the cover member (4). ．． Diaphragm (1)
A situation in which the pilot flow path (3) is blocked due to close contact with the inner surface of the lid member (4) does not occur.

When the water level in the water tank rises, the float (c) moves upward, the tip of the lever QXl rotates upward, and the pilot valve (b powder S) is closed.

Then, the volume of the pressure chamber (2) increases due to the water flowing into the pressure chamber (2) from the small passage 0, the main valve body (2) returns, and the main valve (a) closes to supply water. Stop.

Since the present invention has the above configuration, it has the following advantages.

νI, since a protrusion is provided next to the pilot flow path on the inner surface of the component-free valve, when the main valve is opened, the diaphragm, which is the main valve body, comes into close contact with the brass interior (6) and blocks the pilot flow path. The water that flows into the pressure chamber from the small passage when the pilot valve is open continues to flow out of the pilot passage, and does not push the diaphragm back toward the main valve seat.

Therefore, the diaphragm does not repeatedly vibrate by bending toward the pressure chamber side and returning to the main piston side.
This vibration does not generate noise.

As mentioned above, the diaphragm does not repeatedly bend toward the pressure chamber or return to the main valve seat, so there is less wear and tear on the flexible part, and its durability is low. .

[Brief explanation of drawings]

Fig. 1 is a sectional view of a ball tap for a water storage tank showing a simple embodiment of the present invention, Fig. 2 is an enlarged sectional view of the narrow part, Fig. 3 is a sectional view taken along the line III-III in Fig. 2, and Fig. 4 is FIG. 11 is a 11+ side view showing an example of a conventional ball tap for a water tank. 1... Main valve body 1... Diaphragm 2...
Pressure chamber 3...Pilot (if, path 4...
- Lid member 5... protrusion. Patent applicant: TOTOKIKI CO., LTD.

Claims (1)

[Claims] In a pilot type ball tap for a water storage tank that uses a diaphragm as the main valve element, a pilot flow path is formed on the inner surface of the lid, which forms a pressure chamber together with the diaphragm and has a pilot flow path facing the diaphragm. A ball tap for a water tank whose characteristic is to form an appropriate number of protrusions in an encircling state.