JPS595192B2 - Ball tap for water tank - Google Patents

Description

[Detailed description of the invention] The present invention relates to a ball tap for storing water in a water tank.

Conventionally, this type of ball tap has various structures, but generally, as shown in FIG. 3, the valve seat portion 11 is in the most constricted state in the water passage 1,
The flow rate of the water passing through the core is fast, and together with the rapid changes in the flow channel 1, cavitation occurs in the core, and this cavitation generates noise in the valve part, and the discharge water flowing down from the water outlet 6 is Without being rectified, the water flows down with its flow direction and flow rate turbulent and hits the water surface of the water tank, which also generates noise.

Therefore, with conventional ball taps, the sound of water flowing in the pipes upstream of the ball tap and inside the ball tap is added to these noises, and since the ball tap is installed inside a water storage tank such as a cleaning tank, these noises are The sound resonated inside the water tank, causing extremely loud noise.

Therefore, as a method for preventing cavitation occurring in the valve seat portion 11, British Patent No. 1°110.118 is proposed.
There is one in the specification.

This valve is equipped with a variable adjustment valve in the water passageway upstream of the valve seat to reduce the flow rate and pressure of the flowing water so that it flows gently when it passes through the main valve.

However, in this case, the water passage of the variable adjustment valve part is formed in an L shape, and a valve seat hole is opened in the perpendicular part of this, and a disc-shaped valve body is made to correspond to the direction orthogonal to the valve seat hole. As a result, the water flow direction and water flow area suddenly change, making it impossible to completely prevent noise from occurring at the variable adjustment valve.

It is an object of the present invention to solve these problems and to eliminate the noise generated by the variable adjustment valve section and the noise caused by discharged water hitting the water surface of the water tank, thereby discharging water quietly.

The basic structure of the present invention is that the mutual contact surfaces of the valve body and the valve seat are formed into conical shapes inclined at approximately the same angle, separately from the main valve, in the water passage of the ball tap main body that is opened and closed by the main valve. By providing a variable adjustment valve shaped like a table and installing a control member at the water spout that rectifies the flow direction of the water, applies resistance, equalizes the speed, and allows the water to fall as it is, the flow of water at the variable adjustment valve is improved. The water is discharged into a water storage tank in a quiet flow without causing sudden changes in direction and water flow area.

Hereinafter, the embodiments shown in the drawings will be described in detail.

In the figure, A is a water storage tank such as a water receiving tank or a cleaning tank, and B is a ball tap main body whose rear part is attached to the inside of the side wall of the tank and projects into tank A. It has an inlet 2 and an outlet 3 that communicate through a water passage 1. A water supply pipe 4 is connected to the inlet 2, and a water discharge pipe 5 is connected to the outlet 3.

A water spout 6 is formed in the water spout 5 and has a water flow area sufficiently larger than the water flow area of the flow path, and a control member 7 is attached to the water spout 6 via a cap nut 8.

The control member 7 is made of a wire mesh having a water flow area larger than the flow path or a thin plate with numerous fine holes, and is inserted into the cap nut 8 and locked in the cap nut 80 step. ,
By screwing the cap nut 8 to the spout 6, the spout 6
will be installed on the

For this control member 7, the above-mentioned wire mesh or thin plate with fine holes is used alone, or a thin narrow band plate is bent in a corrugated manner to form a planar star shape or chrysanthemum shape. A current plate may also be used, in which case the current plate is placed upstream of the wire mesh, etc.

a is the main valve of the ball tap, which includes a valve body 10 slidably attached to an opening 9 formed on the lower side of the ball tap body B;
It consists of a valve seat 11 corresponding to a valve seat seating surface formed at the upper end of the valve element 10, and the valve seat 11 is formed so that the valve hole 12 has the minimum water passage area in the water passage 1.

The valve body 10 has a valve shaft 13 integrally protruding from its lower surface.
A hole 14 is bored through the valve shaft 13 at right angles to the axial direction thereof.

The valve shaft 13 projects from the opening 9 to the outside of the pole tap main body B, and engages the operating rod 15 through the hole 14.

The operating rod 15 has one end pivoted to a support shaft 16 protruding from the ball tap main body B, and the other end pivoted to one end of a support rod 17.
The other end of this stop rod 1γ is pivoted to the middle part of the lever 18.

The lever 18 is a protruding shaft 1 with one end protruding from the ball tap body B.
9, and a float (not shown) is attached to the other end.

Thus, the valve body 10 has an operating rod 15, a support rod 17, and a lever 18.
It operates in conjunction with the vertical movement of the float, and when the float is above, it seats on the valve seat 11 and closes the valve, and when it is below, it moves away from the valve seat 11 and opens the valve.

Reference numeral b denotes a variable adjustment valve, which is provided at the upper part of the main body B, and has a valve seat 20 provided in the water passage 1 on the primary side of the main valve a in a direction perpendicular to the valve seat 11 of the main valve a, and a secondary It consists of a corresponding valve body 21 from the side.

The valve body 21 faces the valve seat 20 and is connected to the ball tap body B.
The outer circumferential surface of the shaft portion of the valve body 21 and the inner circumferential surface of the opening 22 are provided with screws 23 that are screwed into each other.
, 24 are provided, and the valve body 21 can move forward and backward by screwing these screws 23 and 24 together.

25 is a gasket which is screwed onto the valve body 21 with a screw 26.

This variable adjustment valve can adjust the opening degree of the valve by adjusting the screwing condition of the valve body 21, and depending on the water supply pressure at the installation site, for example, the opening degree can be decreased when the pressure is high, and the opening degree can be decreased when the pressure is low. Enlarge.

Further, in this variable adjustment valve, the contact surfaces 21' and 20' between the valve body 21 and the valve seat 20 each form a truncated conical inclined surface that expands toward the secondary side at the same angle.

In a ball tap with such a structure, the water in the water tank A is discharged, and when the water level drops, the main valve a opens, and the water flowing from the water supply pipe 4 to the ball tap main body B is passed through the variable adjustment valve b and the main valve a.
The water is discharged from the water spout 6 into the water tank A, and as the water level in the water tank A rises, the float moves upward, causing the main valve a to gradually close and stop water discharging. The water flowing into the ball tap main body B is weakened by the regulating valve, the flow rate is reduced, the pressure is reduced, the water passes through the main valve a, and the water flows through the water outlet 6.
leading to.

The water that has reached the spout 6 is adjusted to flow in the direction of the spout 6 by the control member γ attached to the spout 6, and is spread over the entire area of the spout 6 by the resistance of the control member 1. In contrast, the flow velocity in the flow direction is approximately equal to each part, weakening the flow velocity, and moreover, the water is discharged without disturbing the water flow.

Since the area of this water discharge hole 60 is sufficiently larger than the flow area of the flow path of the ball tap, the flow velocity after passing through the control member 7 is significantly slow, resulting in a quiet laminar flow state similar to flowing starch syrup. The water is discharged into the water tank A.

As mentioned at the beginning, the noise generated from ball taps for water tanks generally includes: ■ Sound caused by cavitation that occurs in the valve seat ■ Sound caused by water discharged from the spout hitting the water surface in the tank ■ There are sounds caused by the sound of flowing water flowing in the upstream piping and ball tap equipment, and the faster the flow velocity, the more likely and louder the noise is. ■ When the float rises, that is, near the valve closing position, Cavitation occurs because the water flow area is extremely restricted in the valve seat area, but noise from water falling from the spout does not occur much because the amount of water is small and the water surface has risen to the vicinity of the spout. @When the valve is fully open, the flow of water is not extremely restricted at the valve seat, causing cavitation.On the other hand, the sound of hitting the water surface is loud because there is a large amount of water and the distance it falls is long.

Now, the noise in the valve seat part is generated by the cavitation, but to explain the cavitation, in general, in ball taps and other faucets, the valve part is the most constricted part, and it changes the direction of the flowing water. Therefore, in this part, the flow velocity of the flowing water is constant, and the flow path changes suddenly, causing a separation phenomenon in the flowing water, and as a result, a cavitation phenomenon occurs.

In the present invention, a variable adjustment valve is provided separately from the main valve on the upstream side of the main valve, so that when the opening of the main valve becomes smaller, the opening of the adjustment valve becomes smaller than that.

Therefore, the water's momentum is weakened by the regulating valve, the flow velocity is reduced, the pressure is reduced, and the water reaches the main valve, so when it passes through the main valve, it becomes a gentle flow, making it difficult for cavitation to occur. Noise caused by the sound of running water in the side piping and ball tap equipment is reduced.

When the pressure is high, the regulating valve is throttled, but the overall flow rate does not decrease that much, so there is no problem.

Furthermore, since the opening degree of the regulating valve is small, the effect can be minimized just before the main valve, which generates the most noise, closes.

'When the pressure is low, the noise is low, and the opening degree of the regulating valve can be set to 100 degrees, so there is no disadvantage of reducing the amount of water discharged.

Ma? A control member is installed that rectifies the flow direction of the sinking water and provides resistance to the flowing water flow to equalize the flow speed and allow it to flow down as it is, so the water discharged from the spout is quiet without disturbing the water flow. Since the water falls onto the surface of the water in the tank, even if the opening of the valve becomes large and the amount of water discharged increases, the discharged water will not hit the surface of the stored water or cause waves, and the discharged water will not flow into the tank. Not only can the noise caused by hitting the water surface be eliminated, but also the sudden vertical movement of the float due to waves can be prevented, and the occurrence of water hammer effect can be prevented.

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

■ The mutual contact surfaces between the valve body and the valve seat of the variable adjustment valve are formed in the shape of a truncated cone inclined at approximately the same angle, so the water flow direction and water flow area in the variable adjustment valve part do not change suddenly and can be adjusted. In addition to preventing the generation of noise from the regulating valve, the water spout is equipped with a control member that rectifies the flow direction of the water, provides resistance to the flow of water, equalizes the flow rate, and allows the water to flow straight down. It is possible to prevent noise caused by water being sprayed in a syrup-like manner and hitting the water surface.

■ The upstream side of the main valve is depressurized by the variable adjustment valve, and the downstream side of the main valve receives back pressure from the control member at the spout, so the pressure difference between the upstream and downstream sides of the main valve becomes small, and the main valve Noise caused by cavitation can be prevented.

(2) The mutual contact surfaces between the valve body and the valve seat of the variable adjustment valve are each formed in the shape of a truncated cone inclined at approximately the same angle, making it easy to make fine adjustments.

■ A control member is installed at the spout that can rectify the flow direction of the water and provide resistance to the flow of water to equalize the speed of flow and allow it to flow straight down, so the surface of the pooled water is not disturbed and there is no risk of water hammer or ball taps caused by the movement of the float. No malfunctions.

[Brief explanation of drawings]

The drawings show an embodiment of the ball tap for a water tank of the present invention,
FIG. 1 is a longitudinal sectional view, FIG. 2 is a longitudinal sectional view of a spout portion, and FIG. 3 is a sectional view showing an example of a conventional ball tap. A...Water tank, B...Ball tap body, a...Main valve, b...Variable adjustment valve,
1... Gutter waterway, 6... Outlet, 7...
...Control member, 20...Valve seat, 21...
...Valve body, 20', 2i (...contact surface.

Claims (1)

[Claims] 1 A ball tap main body whose rear part is attached to the inner wall of the water tank, and a ball tap located in the lower part of the main body located in the water passage inside the main body, which opens and closes in response to the vertical movement of the float as the water surface in the water tank rises and falls. The main valve to be operated is provided in the water passage on the upstream side of the main valve, and is located at the upper part of the main body, and the mutual contact surfaces of the valve body and the valve seat are formed in the shape of a truncated cone inclined at the same angle. a variable adjustment valve; a water spout provided downstream of the main valve and in front of the main body facing downward;
A ball tap for a water storage tank, comprising a control member attached to the spout to rectify the flow direction of the water and provide resistance to the flow of water to equalize the flow rate and allow the water to flow down as it is.