JPS61153071A - Constant flow-rate valve - Google Patents

Abstract

PURPOSE:To prevent the generation of abnormal noise by installing a cylindrical body having the inside diameter larger than the valve port of a ring-shaped valve body made of flexible material integrally with the valve body. CONSTITUTION:A valve body 2 using rubber material as flexible material having elasticity is fitted at the opened port on the lower-edge side forming an effluence port. A thin cylindrical body 21 having the inside diameter larger than the aperture of a valve port 20 is arranged in guide cylinder form surrounding the outer periphery on the outlet side of the valve port 20, and integrally formed continuously to the valve body 2 by the rubber material constituting the valve body 2. Therefore, even if the pressure of water stream increases, and the valve body 2 is bent by the water pressure, the bending of each part in the peripheral direction of the opened edge 20a is made uniform, and the wave motion of the water stream is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses a disc-shaped valve body with a valve opening in the center made of an elastic and flexible material such as rubber, and utilizes its flexure to pump fluid. This invention relates to improvements to constant flow valves that control constant flow rate changes due to pressure fluctuations.

The constant flow valve of the above-mentioned form, as shown in FIG.
A ring-shaped valve body 2 having a circular hole-shaped valve port 20 at its axial center portion is placed in a valve box l using an elastic flexible material such as rubber, and the axial direction of the valve port 20 is aligned with the valve box. 1 is assembled along the direction of the flow path through which fluid flows, and when the water pressure passing through the valve port 20 of this valve body 2 becomes high, the water pressure as shown in FIG. As shown in the figure, the valve body 2 is bent to narrow the opening α of the valve port 20, thereby maintaining a constant flow rate, which has the advantage of significantly simplifying the structure. However, when the water pressure becomes high, there is a problem that a fine continuous noise is generated, which is accompanied by an unpleasant abnormal feeling.

The present invention was completed based on knowledge obtained through various studies to solve this problem.

In other words, the above-mentioned abnormal noise is caused by the fact that when high-pressure water begins to flow through the valve port 20 of the valve body 2, the valve body 2 bends due to the water pressure and narrows the valve port 20. It was found that this was caused by water waves caused by irregular deflection of the valve body 2 when high-pressure water flows through the valve body 20 at high speed. It was discovered that the valve body 2 of a constant flow valve could be made of a resilient and flexible material such as rubber so that it would be able to flex evenly due to fluctuations in water pressure. When the body is formed into a ring shape, a cylindrical body having a diameter larger than the inner diameter of the valve port, which is integrally and continuously formed with the flexible material forming the valve body, is placed on the outlet side of the valve body. This is because good results were obtained when the guide was formed into a protruding cylindrical shape surrounding the front of the outlet side.

Therefore, in the present invention, an elastic flexible material such as a rubber material is used to form a ring-shaped valve body with a circular hole-shaped valve opening in the center, and the inner diameter The present invention proposes a means for arranging a cylindrical body having a large diameter by the flexible material into a guide cylindrical shape surrounding the front of the outlet side of the valve port and forming it integrally with the valve body. It is something.

Next, an example of implementation will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings as in the previous means are used for components having the same effect.

In Fig. 3, l denotes a valve box, which is formed into a cylindrical shape, and an inlet 11 formed at the center of a cap nut lO to be screwed into the valve box is opened at the upper end, and the lower end serves as an outlet. At the opening on the side, a valve body 2 made of a rubber material as an elastic and flexible material is arranged so that the direction of the axis of the valve body 20, which opens in the shape of a circular hole in the central part of the valve body 2, is aligned with the direction of the axis of the valve body 2. The valve seat 12 is fitted along the axial direction of the valve seat 12 and has a threaded groove on the outer periphery of the lower end side.
are screwed together, and the valve body 2 is retained in the above-mentioned position by the valve seat 12.

As shown in FIGS. 4 and 5, the valve body 2, which is formed into a ring shape from the rubber material described above, extends in a radial direction from the mouth edge 20a on the outlet side of the valve port 20. A thin cylindrical body 21 having an inner diameter larger than the diameter of the valve port 20 is arranged on the expanding wall surface 2a on the outlet side in the shape of a guide tube surrounding the outer circumference of the outlet side of the valve port 20. , that wall 2
The rubber material constituting the valve body 2 is formed so as to be integrally continuous with the valve body 2 so as to protrude from the valve body a. The cylindrical body 21 protruding from the outlet side of the valve body 2 is in a state of protruding into the inner cavity of the diameter-reduced tip side 12a of the nipple-shaped valve seat 12 described above.

In addition, the valve seat 12 has a stepped shoulder portion that receives the wall surface 2a on the outlet side of the valve body 2, and has a shoulder portion cut out in a tapered shape so as not to interfere with the action of the valve body 2 being bent by water pressure. ,Also,
The distal end side 12a of the valve seat 12 is configured such that when the cylindrical body 21 moves in the axial direction as described above due to the bending of the valve body 2,
It is designed to act as a guide tube to guide its operation.

In addition, this embodiment device has a valve body 2 that responds to fluctuations in water pressure.
It is a constant flow valve that not only controls the flow rate at a constant level by bending the valve, but also controls the flow rate in response to changes in water temperature. When the support fitting 30 is inserted, the locking piece 3 at the upper end of the support fitting 30 is inserted.
0a is fixedly supported by the valve box l by sandwiching it between the cap nut 10 and the upper end surface of the valve box l, and a conical valve part 40 is provided at the lower end side of the support fitting 30. valve 4
is inserted so as to be slidable up and down, and is pushed downward by a bene 5 provided between it and the support metal fitting 30, and a gate-shaped hanging rod 41 is provided to cross and straddle the support metal fitting 30. It is held in that position by coming into contact with the support fitting 30. A guide cylindrical portion 60 of the wax thermoelement 6 is screwed and connected to this gate-shaped hanging rod 41, and a protruding end of an operating rod 61 is slidably inserted into the guide cylindrical portion 60. However, the support fitting 30
When the wax in the temperature sensing portion 62 of the wax thermoelement 6 expands due to rising temperature and pushes out the actuating rod 61, the wax thermoelement 6 The body of the valve 4 rises relative to the support fitting 30 and lifts the valve 4 together.
The conical valve portion 40 rises to be pulled out from the valve port 20 of the valve body 2 made of the rubber material constituting the constant flow valve, and the opening area of the valve port 20 of the valve body 2 is increased. The wax thermoelement 6, the valve 4, and the valve box l
The support fitting 30 assembled to the valve body 1 may be omitted, and only the valve body 2 may be provided in the valve box 1 to form a dedicated constant flow valve.

The constant flow valve according to the present invention constructed as described above operates as follows.

As the pressure of the water flowing into the valve box increases,
When the valve body 2 is bent by water pressure and the opening degree of the valve port 2o is narrowed as shown in FIG. At this time, the opening edge 2°a on the outlet side becomes a cylindrical body that is integrally formed with the valve body 2 so as to protrude from its outer position toward the front in the water flow direction. The cylindrical body 21 is deformed while being deformed to expand its diameter, and by the regulation by deforming the cylindrical body 21, each part in the circumferential direction of the mouth edge 20a on the outlet side is flexed uniformly. It becomes like this. Therefore, the irregular deflection that occurs when the valve body 2 is deflected due to the flow of high-pressure water flow is eliminated, and the resulting wave motion of the water flow is eliminated, causing the valve body 2 to repeatedly deflect and restore itself, causing abnormal noise. This will effectively prevent this from happening.

As explained above, the means of the present invention has a valve port 20 on the outlet side of the valve body 2 formed in a ring shape from a flexible material with elastic force.
A cylindrical body 21 formed to have a larger diameter than the valve opening 2° so as to surround the front side of the valve opening protrudes forward in the water flow direction from the outer side of the mouth edge 20a on the outlet side of the valve opening 20. Since the flexible material is formed in a continuous manner and the deflection of the valve body 2 is regulated by the cylindrical body 21, the deflection of the valve body 2 due to changes in water pressure is uniform. This makes it possible to prevent abnormal noise from occurring due to irregular deflection when high-pressure water flows through.

One of the means of the present invention becomes even more effective by combining the cylindrical body 21 provided in the valve body 2 with a means for fitting and guiding the cylindrical body 21 into the guide cylindrical portion 60 as in the embodiment.

[Brief explanation of drawings]

Fig. 1 is a vertical side view of a conventional constant flow valve, Fig. 2 is an explanatory diagram of the function of the same valve body, Fig. 3 is a longitudinal side view of a constant flow valve in which the present invention can be implemented, and Fig. 4 is the same as above. FIG. 5 is a front view of the same valve body, and FIG. 6 is an explanatory diagram of the operation of the above valve body. Explanation of drawing symbols l... Valve box lO... Cap nut ll... Inlet port 12... Valve seat 12a... Tip side 2...
Valve body 2a...Wall surface 20...Valve port 20a.
... Mouth rim 21 ... Cylindrical body 30 ... Supporting metal fittings 30a
... Locking piece 4 ... Valve 40 ... Valve part 41
... Hanging rod 5 ... Spring 6 ... Wax thermoelement 60 ... Guide cylinder part 61 ... Operating rod 62.
...Temperature Sensing Part Patent Applicant: NTC Industry Co., Ltd. No. 2
Figure 1v! I

Claims (1)

[Claims] A cylindrical body with an inner diameter larger than the valve opening is placed on the outlet side of the valve body, which is formed into a ring shape with a circular valve opening in the center, made of an elastic and flexible material such as a rubber material. A constant flow valve, characterized in that the flexible material is arranged in a guide cylinder shape surrounding the front of the outlet side of the valve port and formed integrally with the valve body.