JPS5925912B2 - self-closing faucet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-closing faucet that automatically closes after operating an operating part.

Conventionally, there is a self-closing faucet used for sanitary equipment as disclosed in Japanese Utility Model Application No. 53-10436 (shown in Fig. 5), in which a depressurizing faucet 50 is placed on the water flow port 52 side of the main body 51. Although the valve 53 is provided, it is still not sufficient to suppress the water pressure of the water reaching the valve 53 below the required level.

In addition, in this type of self-closing faucet, the valve body 54 is opened from the valve seat 57 via the valve stem 56 by pressing the handle 55 to allow water to flow. Since the degree of separation of the valve body 54 from the valve seat 57, that is, the degree of valve opening, is constant and cannot be adjusted arbitrarily,
If the system is operated under water pressure without sufficient depressurization, the force of the water discharged from the water outlet 58 will be strong, resulting in the disadvantage that the discharged water will scatter from the water outlet 58 and leak onto the floor surface, making it impractical. There wasn't.

Furthermore, even if the main body is equipped with a normally used regulating valve for pressure reduction, when the water supply pressure is high, the flow path is constricted at the valve part in order to reduce the valve opening of the regulating valve. Rapid changes in flow velocity and flow path cause separation of flowing water on the inner wall of the main body, valve body, and other components of the pond, causing cavitation, which not only causes noise but also causes erosion of the flow path wall surface. .

Furthermore, when the fluid is hot water, the rubber gasket that is the valve body expands thermally, and the distance between it and the valve seat surface is small to reduce pressure, and this expansion further reduces the valve opening and causes too much resistance. This caused the problem that the gasket came into contact with the valve seat, blocking the flow path and making it impossible to use hot water.

The present invention was created in order to eliminate the above-mentioned drawbacks of conventional self-closing faucets, and its purpose is to sufficiently reduce the pressure of water reaching the main valve, and to reduce noise and erosion caused by cavitation from the regulating valve. It is possible to prevent this from occurring, and it can also be applied to high-temperature fluids.

The basic structure of the present invention is to form a partition wall with a valve seat hole between the main body that automatically closes the valve and the water inlet side in a self-closing faucet,
The side wall of the valve seat is formed into a counterbore that surrounds the upper part of the valve seat, and an inclined part is provided on the outer periphery of the valve plug that approaches and separates from the valve seat, so that the inclined part faces the counterbore. A pressure reducing regulating valve arranged in such a manner is installed to reduce the water supply pressure through a pressure reducing chamber formed by the inclined part of the valve plug and the counterbore part of the valve seat.

Hereinafter, a detailed explanation will be given based on the embodiment shown in the attached drawings. FIG. 1 shows the structure of a self-closing faucet A according to the present invention in detail, and 1 in the figure indicates a water flow population '2'. The faucet body 4 has a water outlet 3 each having a water outlet 3, and has a water outlet 5 to the water outlet 3 in the middle, and has a valve seat hole 6 and a valve seat 7 annularly projecting downward from the valve seat hole 6 at the lower end. A cylinder body 8 is screwed onto the faucet body 1 in a detachable manner, an upper cylinder body 8 is screwed onto the upper part of the cylinder body 4, and has a pivot portion 10 on its upper end for pivotally supporting a lever bundle 9; 11 is the above-mentioned cylinder body; The inner cylinder 12, which is screwed together with the cylinder 4 and the upper cylinder 8, has its upper end engaged with the lever bundle 9, and has a screw rod 13 for adjusting the valve opening degree rotatably attached therein.
The lower side of the mounting portion of the screw rod 13 is an actuating cylinder in which a concave hole 14 is formed to serve as a guide sliding portion of a spindle (to be described later), and the actuating cylinder 12 is disposed within the inner cylinder 11. It is urged and supported by a spring 15 in a direction opposite to its movable direction.

Further, numeral 16 is screwed to the lower part of the cylinder body 4, and a required number of pressure reducing plates 18 having a small hole 17 in the center of the lower end opening are attached to form a pressure reducing part 19 that produces a pressure reducing effect, and a strainer 20 is installed at the lowermost end. A hollow cylindrical body 21 has an upper part slidably fitted into the concave hole 14 of the actuating cylinder 12, and a spindle 2 which is inserted through the valve seat hole 6 and has a pressure receiving body 22 attached to its lower end.
3 is a spring disposed between the lower surface of the pressure receiving body 22 and the annular projection 24 at the bottom of the hollow cylindrical body 16; 25 is a valve body made of a rubber packing attached to the upper surface of the pressure receiving body 22; and 26
is a U fixed to an annular groove formed on the outer periphery of the pressure receiving body 22.
The packing has a letter-shaped cross section, and the space S defined by the inner circumferential wall of the hollow cylindrical body 16, the lower surface of the pressure receiving body 22, and the lower pressure reducing plate 18 substantially constitutes a pressure chamber.

The valve seat hole 6, valve seat 7, and valve body 25 form a main valve B, and when the main valve B is opened, a certain amount of water is discharged from the water outlet 3.

Next, regarding the regulating valve that forms the gist of the present invention, there is a partition wall 2 on the upstream side of the main valve B, that is, between the main valve B and the water inlet 2.
6', the faucet body 1 is divided into a water supply side a, a main valve side and a water discharge side C, and the water supply side a and the main valve side are separated by the same partition wall 26'.
It communicates with the valve seat hole 27 opened in the valve seat hole 27.

A valve seat 28 is formed around the valve seat hole 27 at the edge of the hole, and a valve seat 28 is formed at an appropriate interval from the periphery of the valve seat 28.
Counterbore portion 29 having a substantially vertical wall surface surrounding 8
form.

Further, the faucet body 1 has an opening with a screw 30 formed on the inner periphery at a position facing the toilet seat 28, and the screw 30 of the opening has a spindle mounting cylinder 3 which can be attached and detached from the outside of the faucet body 1.
1 is screwed on.

Reference numeral 32 denotes a spindle which is rotatably screwed onto the spindle mounting cylindrical body 31 so as to be height-adjustable relative to the valve seat 28 surface. A recessed hole 33 is bored.

34 is a valve plug, and a protruding shaft 35 of the required length is provided on the upper surface side.
is integrally formed, an annular recess 36 is provided on the lower surface side with a required width left at the peripheral edge, and an annular rubber packing 37 is fitted and fixed in the opening 36 with a nut 38 at the lower end,
An inclined surface 39 whose diameter decreases downward is formed on the outer peripheral side wall of the quantity valve frig 34.

The valve plug 34 is installed in such a way that its protruding shaft 35 is loosely inserted into the recessed hole 33 of the spindle 32 and faces the valve seat 28, and the lower side of the spindle 32 and the upper surface of the valve plug 34 A spring 31a is disposed between the parts concentrically with the protruding shaft 35, and under normal conditions, the valve plug 34 is pressed downward by the biasing force of the spring 31a, and the annular rubber gasket 37 is in close contact with the valve seat 28 to close the valve. can be kept.

A decompression chamber 40 is substantially formed by the counterbore 29 and the inclined surface 39 of the valve seat 28, and the valve seat 28 and the valve plug 34 are
, the rubber packing 37 and the spindle 32 constitute a regulating valve C for adjusting the pressure reduction of the water supply according to the present invention.

To describe the operation of a self-closing faucet equipped with the regulating valve C having the above configuration and the function of the regulating valve C, one end of the mass lever bundle 9 is pressed, and the lever bundle 9 is moved around the pivot portion 10 as shown in FIG. , the actuating cylinder 12 moves downward against the spring 15, and the lower end surface of the wire rod 13 attached to the actuating cylinder 12 becomes the upper end surface of the spindle 21. The spindle 21
is also pushed downward.

Therefore, as the spindle 21 descends, the pressure receiving body 22 slides downward within the hollow cylindrical body 16, and the valve body 25 moves toward the valve seat 1.
Water flows in from the inlet 16a opened in the hollow cylindrical body 16 and is opened from the valve seat hole 6, and is discharged from the water outlet 3 through the water inlet 5 of the cylindrical body 4.

At this time, due to the lowering of the pressure receiving body 22, the water present in the space S is pushed out through the small hole 17 of the pressure reducing plate 18.

Due to the above water discharge, water flows out of the main valve side, creating a pressure difference between the main valve side and the water supply side a, and the water pressure in the water supply side a, that is, the water supply pressure from the water flow population 2, is applied to the regulating valve C. The rubber gasket 37 and the valve plug 34 rise under the upward force and separate from the valve seat 28 to open the valve, and the water supply side a and the main valve side are in communication, and water is supplied to the main valve side. be done.

When the lever bundle 9 is released, water flows into the space S through the small hole 17 of the pressure reducing plate 18, and the main valve B is closed.

FIG. 3 shows the open state of the regulating valve C, which is formed by the relative position of the inclined surface 39 of the valve plug 34 and the inner peripheral edge of the upper end opening of the counterbore 29 around the valve seat 28. The water passage area SE of the water outlet E is the opening area S of the valve seat hole 27.
The pressure is reduced to a value smaller than v, and water is temporarily retained between the opening of the valve seat hole 27 and the outlet E, thereby reducing the pressure.

Comparing this with the opening degree of a valve that does not have a pressure reducing chamber, that is, is composed of a flat valve seat and a flat valve body, we find that when the diameter of the valve seat hole is D, the opening of the valve is The opening degree is defined as the distance (lift) between the valve seat surface and the lower surface of the valve body when the valve body separates from the valve seat surface.The valve opening degree is calculated by multiplying the outer circumference of the opening of the valve seat hole by H. That is, it is expressed as vo-πD-H.

Therefore, as the lift I-H increases, the valve opening degree V.

increases linearly as shown by the dashed line in Fig. 4, but the opening area of the valve seat hole is 4/1πD2, and the valve opening degree V
.

This value becomes the maximum value of the valve opening degree because the flow rate of water does not increase even if the gap becomes large.

Therefore, the valve opening degree V. The valve opening is V from the time when the lift becomes 1/4πD2, that is, H=1/4D.

It becomes a constant amount of -1/4πD2. On the other hand, according to the present invention, the water flow area of the outlet E between the inclined part 39 and the counterbore part 29 of the valve plug 34 is reduced by the rising of the valve plug 34,
The distance between the counterbore portion 29 and the counterbore portion 29 gradually increases, and even at the maximum lift amount, the lower end of the inclined portion 39, that is, the lower surface of the valve plug 34 is located below the upper end forming line of the counterbore portion 29. Therefore, even at the same maximum lift amount, the valve seat opening area is 1/4πD2, so it does not become a dog, and a curve as shown by the solid line in FIG. 4 is drawn.

Therefore, the water flow area SE of the outlet E is smaller than the opening area of the valve seat hole, and by reducing the flow path, a decompression chamber 40 can be substantially formed between the two for the water flow.

Therefore, as mentioned above, when the regulating valve C is open, the pressure of the water passing through the open valve is reduced by the pressure reducing chamber 40, so even when the water supply pressure is high, the water pressure of the water reaching the main valve B is reduced. Water does not scatter unnecessarily from the water outlet 3.

Furthermore, the flow rate of water passing through the regulating valve C reaches its maximum near the outlet E of the decompression chamber 40;
9, there is no sudden change in the flow path and cavitation can be prevented from occurring at the same location.

Therefore, water can flow quietly and orderly, no noise is generated when water is discharged, and erosion of the channel wall surface due to cavitation can be prevented.

Under the open state of the regulating valve C as described above, water can be supplied from the water supply side a to the main valve side and further to the water discharge side C, and after a certain amount of water is discharged, the water is discharged into the space S of the hollow cylindrical body 16. Water flows in slowly from the small hole 17 of the pressure reducing plate 18, and the water pressure of the inflow pushes the pressure receiving body 26 upward, and the valve body 25 comes into close contact with the valve seat 7, closing the valve and ending the water supply. .

When the valve is closed, the water pressure inside the main valve side increases and tries to become equal to the water pressure on the water supply side a, so the forces acting on the valve part of the regulating valve C from above and below are balanced and the valve plug 34 is moved by the spring 31a. The valve is closed by being pushed downward.

Furthermore, the opening degree of the regulating valve C can be adjusted by externally adjusting the height of the spindle 32 through which the valve plug 34' is inserted.

For example, when it is desired to further reduce the valve opening, the spindle 32 is lowered by a driver or the like, and the valve plug 34 is lowered.
The rise of the valve plug 34 is suppressed by increasing the reaction force of the spring 31a disposed between the valve plugs 34 and 34.
This can be easily done by reducing the amount of lift.

In addition, the valve plug 34 is not integrated with the spindle 32, but is only loosely fitted at the bottom of the spindle 32, so the valve plug 34 itself can be self-aligned, and automatically moves to the most balanced position with respect to the flow of water. Since the flow of water flowing on the side of the valve plug 34 can be adjusted uniformly around the entire circumference of the valve plug 34, the silencing effect can be increased within the τ layer, and the faucet body 1 It also has the advantage that the spindle 32 and the like can be easily machined without requiring high precision.

Furthermore, the opening degree of the regulating valve C is larger than that of a valve structure that does not form the decompression chamber 40, so that the rubber packing 31 does not fuse to the valve seat 28, and stable hot water supply can be realized at all times.

As described above, the self-closing valve equipped with the pressure reducing regulating valve according to the present invention has the following effects due to its configuration.

(1) The pressure of the water flowing from the main valve to the water outlet can be reduced by the required amount, so the water pressure can be adjusted.
Since water passing through the regulating valve does not cause cavitation, noise generation and corrosion of the internal walls can be prevented.

(2) The valve body of the regulating valve can form a relatively large distance from the valve seat surface when the valve is opened, so even if the elastic packing expands due to exposure to high temperatures, it will not come into contact with the valve seat, and it will not touch the valve seat when exposed to hot water. It can also be used as a hot water supply facility.

[Brief Description of the Drawings] Fig. 1 is a side sectional view of a self-closing faucet according to the present invention, Fig. 2 is a side sectional view showing the regulating valve C, and Fig. 3 shows the open state of the regulating valve C. FIG. 4 is a diagram showing a comparison of valve opening degrees depending on whether a regulating valve has a decompression chamber structure or not, and FIG. 5 is a partially cutaway side view showing a conventional self-closing faucet. A: Self-closing faucet, B: Main valve, C:
...Adjustment valve, E...Outlet, S...
Pressure chamber, 1...faucet body, 2...water inlet, 3...water outlet, 27...valve seat holder 28... ... Valve seat, 29 ... Counterbore, 32 ... Spindle, 34 ... Valve plug, 37 ... Elastic packing, 39 ...・
・Slope, 40... Decompression chamber.

Claims (1)

[Claims] 1 It has a valve opening mechanism that opens the main valve provided between the water inlet side and the water outlet side of the faucet body by pressing the handle, and allows the pressure receiving body that operates the valve body of the main valve to be raised and lowered freely. A self-closing faucet in which a built-in pressure chamber with a small passage on the water inlet side is provided in the faucet main body, and the valve body is closed by the water pressure of water flowing in from the small passage of the pressure chamber. A partition with a valve seat hole having a valve seat on the main valve side is formed between the valve and the water inlet side, and the valve seat has a flow path adjacent to the back of the valve seat, and its side wall surface surrounds the valve seat. A counterbore is provided, and a spindle is installed in the opening opened in the main valve body facing the valve seat and on the side of the main valve from the above-mentioned partition wall so that its height can be freely adjusted with respect to the valve seat surface, and an elastic packing is provided at the lower end that tightly contacts the valve seat. A valve plug having a diameter is disposed so as to be movable up and down in the direction of movement of the spindle, and a side wall of the valve plug is formed with an inclined surface whose diameter decreases toward the valve seat, and the inclined surface and the counterbore of the valve seat are connected to each other. A self-closing faucet comprising a regulating valve that forms a pressure reducing chamber whose outlet is smaller than the opening area of the valve seat hole, thereby reducing and adjusting the water pressure of water reaching the main valve.