KR0153479B1 - Flow control valve - Google Patents

Abstract

The present invention is to facilitate the exchange of the diaphragm valve, the outlet flow path is formed in the L-shape with respect to the inlet flow path, and the diaphragm valve is disposed at the start end thereof, and the hydraulic pressure is attached to the rear side of the diaphragm valve. The diaphragm valve can be replaced by simply removing the cover, regardless of the solenoid valve attached to the opposite side to the inlet side by fixing it with a sealed cover body.

Description

Flow control valve

1 is a side view showing a cross section of an embodiment of the present invention.

2 is a front view of the apparatus of the present invention.

3 is a cross-sectional view showing another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: Main body housing 2: Entrance side flow path

3: exit side flow path 6: diaphragm

7: cover body 10: hydraulic chamber

14: liquid passage 15: drainage passage

Ⅴ: Solenoid valve

[Industrial use]

The present invention relates to a flow control valve capable of arbitrarily changing the flow rate

[Prior art]

Preset lubrication for gasoline stands is used with a flow control valve that can be lubricated at the first large flow rate and tighten the flow rate when it reaches a set amount.

Applicant disclosed in Japanese Patent Application Laid-Open No. 62-28353 enables such oil supply, which is provided with a partition on a part of the oil supply line so that the liquid supply line is always opened by a spring in the flow path on the outlet side thereof. A diaphragm is provided to increase the force in the closing direction, and a body block having a back pressure chamber and a pair of solenoid valves is attached to the back of the diaphragm so that the passages upstream and downstream of the flow path through the back pressure chamber By opening and closing the valve, the opening degree of the diaphragm is changed to control the flow rate.

This device has the advantage that the flow rate can be changed large and small by using a pair of solenoid valves of the same size, and furthermore, the device can be compactly constructed.However, when the diaphragm is damaged due to long-term use, it is equipped with an electromagnet. There is room for further improvement in that the main block must be removed and the diaphragm can not be replaced easily.

[Problem to Solve Invention]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and its object is to provide a new flow control valve which can easily replace the diaphragm without touching the solenoid valve mechanism forming the heart portion.

[Means for solving the problem]

The flow control valve of the present invention for achieving the above object is a main body housing formed so that the inlet side passage and the outlet side passage cross each other in an L-shape; A diaphragm valve installed at a valve seat provided at the start end of the pipeline of the outlet side flow passage to open and close the outlet side flow passage; And a cover body which forms a hydraulic chamber for operating the diaphragm valve, attaches the periphery of the diaphragm valve to the main body housing in close contact with the outlet end (the axial direction of the outlet side flow path), and detaches and attaches freely. ; A liquid passage formed in the main body housing to communicate with the inlet side passage and the hydraulic chamber, and a drain passage formed in the main body housing to connect the hydraulic chamber and the outlet side passage; It is installed to open and close each of the liquid passage and the drain passage, and the solenoid valve is installed to one side of the main body housing so as not to interfere with the cover body and the diaphragm valve; it is configured to remove the cover body and the diaphragm valve from the housing body It is characterized in that the diaphragm valve can be replaced regardless of the solenoid valve so as not to interfere with the solenoid valves.

EXAMPLE

Hereinafter, the illustrated embodiment will be described.

1 and 2 show a flow control apparatus according to an embodiment of the present invention.

In the drawing, reference numeral 1 denotes a main body housing in which the inlet side passage 2 and the outlet side passage 3 are formed in an L-shape inside, and the main body housing 1 again starts the passage of the outlet side passage 3. The end part 4 is formed so that it may protrude inside the inlet side flow path 2, and the diaphragm valve 6 which opens and closes the outlet side flow path 3 is arrange | positioned at the valve seat 5 provided in this starting end. .

Reference numeral 7 denotes a cover body for fixing the diaphragm valve 6 to the main body housing 1 and forming a hydraulic chamber for valve operation, and the cover body 7 surrounds the peripheral edge of the diaphragm valve 6. It is secured as a bolt 9 on the back side of the diaphragm valve 6, that is, on the side 8 opposite to the outlet end of the main body housing 1 so as to be fitted therein. The hydraulic chamber 10 is formed, and a force is applied to the diaphragm valve 6 always being pushed toward the valve seat 5 by the spring 11 provided therein.

On the other hand, on the other side of the main body housing 1, that is, the part 12 opposite to the inlet end, the liquid passage 14 extending from the inlet side passage 2 to the hydraulic chamber 10 and the hydraulic chamber 10 are provided. And a drain passage 15 communicating with the outlet side passage 3 from the first passage, further comprising a first solenoid valve V1 for opening and closing the liquid passage 14 and the drain passage 15, and a second electron. The valve V2 is provided, and it is comprised so that a flow volume may be controlled by operating these solenoid valves V1 and V2.

The flow control valve configured as described above performs the operation described in Japanese Patent Application Laid-Open No. 62-28353. However, when the operation of the apparatus is briefly described, as shown in FIG. 3) and the feed pump is operated with the first and second solenoid valves V1 and V2 closing the liquid passage 14 and the drain passage 15, respectively, followed by the second solenoid valve. When the drain passage 15 is opened by energizing (V2), the diaphragm valve 6 receives the pressure of the liquid in the inlet flow passage and moves left against the spring 11 to open the pipeline accordingly.

From this state, when the first solenoid valve V1 is energized to open the plating liquid passage 14, the second solenoid valve V2 is released and the drainage passage 15 is closed to close the liquid passage. It is pushed into the hydraulic chamber 10 through the 14) and the diaphragm valve 6 moves toward the valve seat 5 by the hydraulic pressure and the spring force of the spring 11 to close the pipeline.

Therefore, at the time when the diaphragm valve 6 closes the pipeline to a predetermined place (referring to a state in which the pipeline is small open), the conductive passage 14 is closed by closing the energization to the first solenoid valve V1. When the hydraulic chamber 10 is closed, the diaphragm valve 6 maintains this state and controls the flow rate to a predetermined value.

Then, when the opening of the pipe is small, the diaphragm valve 6 tightens the opening of the flow path 3 again when the first liquid valve V1 is energized again to open the plating liquid passage 14. When the drain passage 15 is opened by energizing the second solenoid valve V2 from this state, the opening degree of the pipe is increased to increase the flow rate.

In the case where it is necessary to close the flow path again, as described above, the first liquid valve V1 may be energized and the liquid passage 14 may be opened.

In addition, if the first and second solenoid valves V1 and V2 continue to be opened, after the diaphragm valve 6 is closed, the liquid flowing into the hydraulic chamber 10 from the liquid passage 14 is discharged from the drain passage 15. Since it flows out, it can continue to flow a small liquid.

Therefore, when the diaphragm valve 6 seems to be damaged by long-term use, the bolt 9 is loosened and the cover 7 is removed from the surface 8 on the opposite side of the outlet end.

As a result, the diaphragm valve 6 can be detached independently of other members such as the solenoid valves V1 and V2. Therefore, a new diaphragm valve 6 is attached hereto to prevent this kind of abnormality. Can be done simply and quickly.

3 shows an embodiment in which the present invention is applied to a flow control valve using a single solenoid valve.

This embodiment provides a thin liquid passage 24 for communicating from the inlet side passage 2 to the hydraulic chamber 10 at a portion 12 opposite to the inlet end of the main body housing 1, while the hydraulic chamber ( After thickening the drainage passage 25 from 10) to the outlet side passage 3, the passage 25 is opened and closed by a solenoid valve (V), and the pipeline side of the outlet side passage 3 is started again. The diaphragm valve 6 which opens and closes by the hydraulic pressure in the hydraulic chamber 10 is installed in the valve seat 5 provided in the end part 4, and this peripheral edge part is clamped by the lid | cover 7 provided in the back surface. I did it.

In this embodiment, the diaphragm valve can be easily replaced by the operation of simply removing the lid 7 irrespective of the solenoid valve or other member in the same shape as in the first embodiment. By opening the valve (V), the amount of drainage larger than the inflow from the liquid passage (24) can be discharged from the drain passage (25) to open the diaphragm valve (6) completely, and the plating liquid by closing the solenoid valve (V). The diaphragm valve 6 can be closed by the pressure of the liquid which flows in from the channel | path 24, and it can comprise as a control valve.

[Effects of the Invention]

As described above, according to the present invention, the outlet flow path is angled with respect to the inlet flow path, and the diaphragm valve is disposed at the start end of the flow path, which is attached to a position different from the valve opening and closing mechanism, that is, the back side of the diaphragm valve. The diaphragm can be easily and easily replaced regardless of the solenoid valve or other member because it is fixed by the attached lid.

Claims (1)

A main body housing formed such that the inlet side passage and the outlet side passage cross each other in an L-shape; A diaphragm valve installed at a valve seat provided at a start end of the pipeline of the outlet side flow passage to open and close the outlet side flow passage; A cover body is formed to form a hydraulic chamber for operating the diaphragm valve, and attaches the periphery of the diaphragm valve to the main body housing in close contact with the outlet end (axial direction of the outlet side flow path) and freely detachable. Wow; A liquid passage through which the inlet side passage and the hydraulic chamber communicate with the main body housing; A drain passage formed in the body housing to connect the hydraulic chamber and the outlet side passage; It is installed to open and close each of the liquid passage and the drain passage, and the solenoid valve is installed to one side of the main body housing so as not to interfere with the cover body and the diaphragm valve; it is configured to remove the cover body and the diaphragm valve from the housing body Flow control valve, characterized in that not to interfere with the solenoid valves.