KR950010610Y1 - Function exchanging device of pilot-solenoid valve - Google Patents

Abstract

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Description

Possible switching device of pilot solenoid valve

1 is a longitudinal sectional view of a conventional normally closed pilot solenoid valve.

2 is a longitudinal cross-sectional view of a conventional normally open pilot solenoid valve.

Figure 3 is a longitudinal cross-sectional view of the functional switch pilot solenoid valve of the present invention.

Figure 4 is a schematic diagram showing the operation of the conventional normally closed pilot solenoid valve,

(a) is a state diagram at the time of non-energization.

(b) is a state diagram at the time of energization.

Figure 5 is a schematic diagram showing the operation of the conventional normally open pilot solenoid valve,

(a) is a state diagram at the time of non-energization.

(b) is a state diagram at the time of energization.

6 is a schematic view of a state switchable pilot solenoid valve of the present invention is switched to the normally closed type,

(a) is a state diagram at the time of non-energization.

(b) is a state diagram at the time of energization.

7 is a schematic view of a state in which the function-converted pilot solenoid valve of the present invention is switched to the normally open type,

(a) is a state diagram at the time of non-energization.

(b) is a state diagram at the time of energization.

* Explanation of symbols for main parts of the drawings

1: body 2: diaphragm

3: bracket 4: sleeve tube

5: solenoid coil 6: plunger

9,10: Orifice 12: Tube

13: function switching lever

The present invention relates to a pilot solenoid valve that is a device for controlling the flow of fluid by using a magnetic field of the solenoid. More specifically, a single valve can perform the function of a normally closed valve as well as a normally open valve. It relates to a function switching device of the pilot type two-way solenoid valve to enable.

In general, the pilot type two-way solenoid valve is divided into two types, normally closed and normally open, depending on the function. The closed type is a valve that is kept closed when not energized and is open when energized. The valve is kept open and closed when energized.

The reason for producing two types of solenoid valves is to select and use an appropriate type according to the energization time of the solenoid.

For example, in installations where the time to shut off the flow of fluid is greater than the opening time, the use of normally closed valves is advantageous in terms of power consumption or valve life, and vice versa. .

1 is a cross-sectional view showing a conventional normally closed solenoid valve, the valve includes a main body 1 having a fluid inlet and an outlet, a diaphragm 2 installed inside the main body to open and close a flow path of the main body, and an upper portion of the diaphragm. A bracket (3) installed on the diaphragm and supporting the upper sleeve tube (4), and a plunger (6) and the plunger (6) installed in the sleeve tube and pulled upward when the solenoid coil (5) is energized. ), A spring 7 for exerting a force to always return to its original position, and a stopper 8 for limiting the moving distance of the plunger.

In addition, an orifice 9 is formed between the space in the sleeve tube 4 and the outlet side of the main body 1, and the inner space of the sleeve tube 4 is connected to the upper space (pressure chamber) of the diaphragm 2. In addition, the inner space of the sleeve tube 4 is in communication with the inlet side (left side in the drawing) of the main body 1 by an orifice (not shown).

And the plunger 6 is to close the guide end of the sleeve tube 4 side when the non-electricity.

Therefore, in the state where the solenoid coil 5 is not energized, the plunger 6 closes the inlet C of the orifice 9 formed between the sleeve tube 4 and the main body 1 outlet side as shown in FIG. 4a. On the other hand, the pressure at the inlet side of the main body 1 is transmitted into the sleeve tube through an orifice B formed between the inlet side and the sleeve tube 4, and by this pressure, the diaphragm 2 is pressed downward in the drawing so that the main body ( The main orifice A of 1) is closed.

In addition, when the solenoid coil 5 is energized in the above state, as shown in FIG. 4B, the plunger 6 is raised by the magnetic force to open the orifice 9 so that the pressure at the inlet side is space in the sleeve tube 4. And the orifice 9 are transmitted to the outlet side of the main body 1 so that a differential pressure is generated between the pressure at the pressure port side of the main body 1 and the pressure in the sleeve tube 4, and the differential pressure causes the The diaphragm 2 which closed the main orifice A raises and opens the main orifice of a main body.

That is, while the solenoid coil is not energized, the flow of fluid is blocked and while the energization is conducted, the fluid entering the inlet side of the main body 1 exits to the outlet side.

In the normally open solenoid valve, as shown in FIG. 2, almost all basic configurations are the same as the normally closed valve. The difference from the normally closed valve is that the orifice 11 is formed in the stopper 8, and the orifice and the main body ( The tube 12 is connected between the outlet side of 1) and differs from the outlet side.

Therefore, the normally open solenoid valve is, unlike the normally closed solenoid valve, in the state where the solenoid coil 5 is not energized, the plunger 6 opens the orifice 11 of the stopper 8 as shown in FIG. 1) The pressure at the inlet side is transmitted to the outlet side through the orifice (B) and the sleeve tube (4) and the orifice (11) (D) and the tube (12) and thus the pressure at the inlet side of the body (1) and in the sleeve tube. The differential pressure is generated between the pressures, causing the diaphragm 2 to rise, and the main orifice a of the main body 1 is opened.

In addition, when the solenoid coil is energized, the plunger 5 is raised by magnetic force to close the orifice 11 as shown in FIG. 5b, and is transmitted only inside the sleeve tube 4 through the pressure orifice B on the pressure port side. The diaphragm 2 is pressed downward by the pressure, and the main orifice a of the main body is closed.

However, when one of the two types of solenoid valves such as normally open type and normally closed type is selected and used as described above, there are the following problems.

For example, if the conditions of use of equipment with normally closed valves are changed to increase the time to open the flow to the fluid, or in contrast to the above, the time to keep the valve closed in the equipment with normally open valves is increased. In this case, the energization time is long, resulting in waste of power and shortening of valve life.

If the use condition of the equipment is changed and the energization time is long, the valve can be replaced with another type, but the economic burden is increased and the replacement work is cumbersome.

The purpose of the present invention is to install a function switching lever that can be manually operated in the orifice path of the solenoid valve, so that the solenoid valve can be used as a normally closed type and also as a freezing type as needed. A detailed description will be given with reference to FIG. 3.

3 is a cross-sectional view of the pilot solenoid valve to which the device of the present invention is applied, the main body 1, the diaphragm 2, the bracket 3, the sleeve tube 4, the plunger 6, the solenoid coil 5, and the spring ( 7), the configuration of the stopper 8, the orifice 11, the tube 12 and the like is the same as the conventional normally open pilot solenoid valve.

The bracket 3 has an orifice 9 passing through the lower end of the space in the sleeve tube 4 and an orifice 10 passing through the tube 12 and the orifices 9 and 12 intersect each other. Extends through the outlet side of the main body 1, and at the intersections of the orifices 9 and 10, a function switching lever 13 for selectively communicating these orifices 9 and 10 with the outlet side is provided. It is installed.

The function switching lever 13 has a circular cross-sectional shape and half is cut.

Therefore, the orifice 9 may be made to pass through the outlet side of the main body 1 by the means for rotating the function switching lever 13, or the orifice 10 connected to the tube 12 may be made to pass through the outlet side. .

The solenoid valve of the present disclosure as described above can be used normally closed or normally open by a simple operation of rotating the function switching lever 13.

3 and 6 are state diagrams in which the pilot solenoid valve of the present invention is normally closed. The orifice 10 connected to the tube 12 of the orifices 9 and 10 in different directions formed on the bracket 3 is shown. Is blocked by the function switching lever, and the other orifice 9 passes through the outlet side of the main body 1 to form the same flow path as the conventional normally closed valve.

Therefore, when the solenoid coil 5 is not energized, the diaphragm 2 closes the main orifice A of the main body 1 as shown in FIG. 6A, and the flow of fluid is interrupted. Similarly, the plunger 6 rises and the diaphragm 2 rises due to the pressure difference to open the main orifice.

In addition, by rotating the function switching lever 13 in the state shown in FIG. 3, the orifice 10 connected to the tube 12 is allowed to pass through the outlet side of the main body, and at the same time, the other orifice 9 is normally opened. The main orifice of the main body is opened only when the same flow path as that of the valve is formed and the solenoid coil 5 is energized.

Therefore, when the solenoid coil 5 is not energized, the diaphragm 2 opens the main orifice A of the main body as shown in FIG. 7a so that the fluid entering the inlet side of the main body flows to the outlet side, and the solenoid coil 5 When the power is supplied to the diaphragm, the diaphragm 2 is pressed as the pressure increases in the sleeve tube as shown in FIG. 7b to close the main orifice A of the main body.

And the function switching valve 13 applied to the device of the present invention can be used as a function of the normally closed or normally open even in the case of power failure because it is manually operated.

As described above, the present invention enables one solenoid valve to be used in a normally closed type and a normally open type, so that when the energization time of the solenoid coil is long due to the use conditions of the equipment, it is converted into the valve type of the opposite type to consume power. It can reduce the service life and extend the service life.

Claims (2)

A main body 1 having a fluid inlet and an outlet, a diaphragm 2 for opening and closing the main orifice of the body, a bracket 3 for holding and fixing the diaphragm and the sleeve tube 4, and the sleeve tube Orifice (9) and the sleeve which is installed and composed of a plunger (6) which moves as the power is supplied to the solenoid coil (5) between the lower end of the sleeve tube and the outlet side of the body to the bracket (3) A function switching valve 13 for installing an orifice 10 connecting between the outlet side of the body through the tube 12 from the upper end of the tube and selectively opening and closing these orifices at the intersection of the two orifices 9 and 10. Function switching device of the pilot solenoid valve, characterized in that by installing the. 3. The function switching device of the pilot solenoid valve according to claim 2, wherein the function switching valve (13) has a circular multi-sided shape and a half part is dug to selectively open or close the orifice according to the rotational operation of the function switching valve.