JPH11159641A - Constant flow valve having check mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally form a check valve and a constant flow valve by constituting a constant flow valve having a check mechanism of a valve main body to form a fluid inlet and a valve chest, a valve element to form a freely deformable passage, a holding means to hold this element and a cover member to form a fluid outlet. SOLUTION: A valve element 8 curves with a contact point with a pipe as a fulcrum by supply pressure of raw water flowed in from a fluid inlet 2. A space part is generated between a valve seat 4 and a valve element 8 by curving, and a clearance is also generated between an inner peripheral wall of a valve chest 3 and an outer peripheral wall of the vale element 8. The raw water flows out of a fluid outlet 10 through a passage 6 and a water passing passage 7 from this clearance. When raw water supply pressure increases, since a curving rate of the valve element 8 becomes large, the passage 6 flattens to adjust a flow rate of the raw water. The raw water of a constant flow rate can be supplied even when the raw water supply pressure changes since the valve body 8 curves in response to the raw water supply pressure. When the raw water stops, the valve element 8 is restored, and blocks up the fluid inlet 2 to check a counterflow.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant flow valve having a check valve function.

[0002]

2. Description of the Related Art Usually, as a means for removing dissolved gas in raw water, a deaerator using a hollow fiber-like gas separation membrane is frequently used because of its compactness and easy handling. As shown in FIG. 7, this type of apparatus has a raw water supply source 2
Gas separation membrane module 23 in which a gas separation membrane such as a hollow fiber gas separation membrane is housed in a water supply line 22 connected to
The raw water is passed through the gas separation membrane module 23, and the gas separation membrane module 23 is evacuated in the water passing process to separate and remove the dissolved gas in the raw water. . Regarding the flow rate of the raw water supplied to the gas separation membrane module 23, a constant flow valve 24 for supplying a preset predetermined flow rate is provided in the water supply line 22 in order to obtain deaerated water having a predetermined deaeration degree. The water supply line 22 is provided with a check valve 25 for preventing backflow of raw water.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the cost by integrating a check valve and a constant flow valve in the deaerator.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention according to the first aspect of the present invention comprises a valve body having a fluid inlet and a valve chamber, and a deformable valve body. A valve body having a flow path formed therein, a holding means for holding the valve body, and a lid member having a fluid outlet formed therein. A compression spring is provided between the cover member and the cover member.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be explained.
It comprises a valve body having a fluid inlet, a valve chamber and a valve seat, a valve body having a deformable flow path, holding means for holding the valve body, and a lid member having a fluid outlet. Further, a compression spring is provided between the valve body and the lid member.

The valve body is formed, for example, by molding a synthetic resin into a substantially concave shape, providing a valve chamber inside, forming a valve seat at the bottom of the valve chamber, and forming a valve seat having a predetermined diameter at the center of the valve seat. The fluid inlet is open. Further, the valve body is formed, for example, into a disk having a predetermined thickness and an outer shape in which synthetic rubber can be freely inserted into the inner peripheral wall of the valve chamber, and crosses the center of the thickness of the disk in a cross shape. A water passage having a predetermined diameter penetrates a flow path having a predetermined diameter and is orthogonal to a portion where the flow path intersects and one surface of the disk. The holding means is formed, for example, into a pipe of a predetermined length having an outer shape capable of freely inserting a synthetic resin into the inner peripheral wall of the valve chamber. Further, the lid member,
For example, a synthetic resin is formed into a disk having the same dimensions as the outer shape of the valve body, and a fluid outlet having a predetermined diameter is opened at the center. Then, the valve body is inserted into the valve chamber so that the water passage is located outside, and then the pipe is inserted so as to hold the valve body, and the cover member is fitted with appropriate means (for example, screwing). ) To complete the assembly of the constant flow valve with the check function.

[0007] According to the constant flow valve with the check function having the above structure,
Due to the supply pressure of the raw water flowing from the fluid inlet, the valve body is curved at the contact point with the pipe as a fulcrum, and a space is generated between the valve seat and the valve body by bending, and the inner peripheral wall of the valve chamber and A gap also occurs between the valve body and the outer peripheral wall. Then, the raw water flows out of the fluid outlet through the gap through the flow path and the water passage. Therefore, as the raw water supply pressure increases, the degree of curvature of the valve body increases, so that the flow path is flattened and the flow rate of the raw water is adjusted. That is, since the valve body is curved in accordance with the supply pressure of the raw water, it is possible to supply a constant flow of the raw water even when the supply pressure of the raw water varies. Further, when the supply of the raw water is stopped, the valve element is restored by the elastic force, and closes to the valve seat to block the fluid inlet, so that the backflow of the raw water from the fluid outlet side can be prevented. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional explanatory view schematically showing the configuration of a first embodiment of a constant flow valve with a check function embodying the present invention.

Referring to FIG. 1, a constant flow valve 1 with a check function according to the present invention includes a valve body 5 having a fluid inlet 2, a valve chamber 3 and a valve seat 4, a deformable flow path 6 and a water flow path 7. , A holding means 9 for holding the valve body 8, and a lid member 11 having a fluid outlet 10.

As shown in FIG. 1, the valve body 5 is provided with a valve chamber 3 formed of, for example, a synthetic resin in a substantially concave shape and having an inner peripheral wall having a predetermined depth. It is seat 4,
The fluid inlet 2 is opened at the center of the valve seat 4. Further, as shown in FIGS. 1, 2 and 3, the valve body 8 is formed into a disk having a predetermined thickness and an outer shape capable of freely inserting synthetic rubber into the inner peripheral wall of the valve chamber 3, for example. A flow path 6 having a predetermined diameter crossing the center of the thickness of the disk in a cross shape.
6, a water passage 7 having a predetermined diameter, which is orthogonal to a portion where the two flow paths 6 intersect and one surface of the disk, is opened. In this embodiment, a pipe member of a predetermined length having an outer shape that can be freely inserted into the inner peripheral wall of the valve chamber 3 is provided as the holding means 9. One end of the pipe member is in contact with the outer surface of the valve body 8 mounted in the valve chamber 3, and the other end is set to a length that matches the end surface of the valve body 5. The lid member 11 is formed, for example, of a synthetic resin into a disk having the same dimensions as the outer shape of the valve body 5, and has a fluid outlet 10 having a predetermined diameter in the center. Then, the valve element 8 is inserted into the valve chamber 3 so that the water passage 7 is on the outside, that is, on the fluid outlet 10 side, and then the holding means 9 is inserted, and the lid member 11 is appropriately inserted. The valve body 5 is sealed to the end face of the valve main body 5 by means (for example, screwing) to complete the assembly of the constant flow valve 1 with a check function.

The constant flow valve 1 with a check function having the above structure is shown in FIG.
As shown in the operation diagram of FIG. 3, the valve body 8 is bent with the contact point with the holding means 9 as a fulcrum by the supply pressure of the raw water flowing from the liquid inlet 2, and the valve seat 4 and the valve body 8 are bent.
And a space is also created between the inner peripheral wall of the valve body 5 and the outer peripheral wall of the valve body 8. Then, the raw water flows from each of the flow paths 6 provided in the valve body 8 through the gap.
And a predetermined flow rate of raw water is supplied to the load side from the fluid outlet 10 through the water passage 7.

The valve element 8 bends based on the supply pressure of the raw water, and the respective flow paths 6 are deformed (flattened) by being bent to make the flow rate of the raw water constant. That is, when the supply pressure is low, the degree of curvature is small, and accordingly, the deformation of each flow path 6 is also small. On the other hand, when the supply pressure is high, the degree of curvature is large, the deformation of each of the flow paths 6 is large, and the cross-sectional area of the flow path is small. As described above, even when the supply pressure of the raw water fluctuates, the degree of curvature of the valve body 8 bends in accordance with the supply pressure, so that a constant flow of the raw water can be supplied. When the supply of the raw water is stopped (the state shown in FIG. 1), the valve body 8 is restored by the elastic force and adheres to the valve seat 4 to block the fluid inlet 2, so that the fluid outlet 10 is closed. Backflow of raw water can be prevented.

Next, a second embodiment which is another embodiment of the holding means 9 will be described with reference to FIG. Note that the same members as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

In the second embodiment shown in FIG. 5, the pipe member as the holding means 9 described in the first embodiment and the lid member 11 are integrated. Therefore, the valve body 5
As means for joining the lid member 11 integrated with
For example, if a female screw (not shown) is formed on the inner peripheral surface of the valve chamber 3 and a screw (not shown) is formed on the outer peripheral surface of the holding means 9 of the lid member 11, the lid member 11 is attached to the valve. Since it can be screwed to the main body 5, assembly becomes easy.

Next, a constant flow valve 1 with a check function according to the present invention.
A third embodiment which is another embodiment will be described with reference to FIG. Note that the same members as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

In the third embodiment shown in FIG. 6, a compression spring 12 is provided between a valve body 8 and a lid member 11. In the third embodiment, for example, when the supply pressure of raw water is relatively high or when the valve 8 is formed of soft rubber or the like, the degree of curvature of the valve 8 due to the supply pressure of raw water is suppressed. is there. Therefore, by providing the compression spring 12, even when the raw water supply pressure is high or the valve body 8 is made of a soft material, the function of the constant flow valve 1 with the check function of the present invention can be exhibited.

[0017]

As described above, according to the present invention, a valve body having a liquid inlet and a valve seat, a valve body having a deformable flow path, and holding means for holding the valve body are provided. ,
Since it is a constant flow valve with a check function consisting of a lid member with a fluid outlet, the structure is simple and the cost is low, and the cost is significantly higher compared to the cost of two valves, a conventional check valve and a constant flow valve. Can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view schematically showing the configuration of a first embodiment of a constant flow valve with a check function according to the present invention.

FIG. 2 is an explanatory front view of the valve body shown in FIG. 1;

FIG. 3 is an explanatory side view of FIG. 2;

FIG. 4 is an explanatory cross-sectional view illustrating an operation state during supply of raw water in FIG. 1;

FIG. 5 is an explanatory sectional view schematically showing the configuration of a second embodiment of the constant flow valve with a check function according to the present invention.

FIG. 6 is an explanatory sectional view schematically showing the configuration of a third embodiment of a constant flow valve with a check function according to the present invention.

FIG. 7 is a flow explanatory diagram of a conventional degassing apparatus provided with a check valve and a constant flow valve in a water supply line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Constant flow valve with check function 2 Fluid inlet 3 Valve room 5 Valve body 6 Flow path 8 Valve 9 Holding means 10 Fluid outlet 11 Lid member 12 Compression spring

Claims (2)

[Claims] A valve body having a fluid inlet and a valve chamber.
, A valve element 8 having a deformable flow path 6, and the valve element 8
And a cover member 11 having a fluid outlet 10 formed therein. 2. A constant flow valve with a check function according to claim 1, wherein a compression spring is provided between said valve element and said lid member.