JPH0348461Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a solenoid valve used for controlling fluids such as gas or liquid fuel, and particularly to a solenoid valve for gas control.

(Description of Prior Art) Due to the diversification of control elements, solenoid valves used for gas control are often used in combination with, for example, gas pressure regulators and flow rate regulators.
It is becoming less common for solenoid valves to be used alone. Moreover, it has become necessary to reduce the number of parts and joints incorporated into these devices, and to ensure reliability and low cost as a control device. In other words, measures to ensure reliability, respond to the diversification of specifications requested by customers, and promote low prices by simplifying the manufacturing process are essential conditions.

However, as shown in FIG. 3, in the conventional solenoid valve, the gas that needs to be controlled is blocked by a valve rubber 52 attached to a valve seat 51, and the closing force is applied to the plunger 5.
3 by means of a valve spring 54 which presses the valve downward.
A plunger guide 55 is arranged to guide the sliding movement of the plunger and seal gas, a coil 56 generates magnetic force when energized, and a magnetic material is used to convert the generated magnetic force into movement of the plunger. It is composed of a yoke 57, a cover 58, and the like. The operation is performed by the coil 56.
When no current is flowing through the coil, the valve rubber 53 is pressed against the valve seat 51 by the spring 54, and the gas is occluded.When the current flows through the coil, a magnetic force is generated to attract and pull the plunger 53 upward. The valve rubber moves away from the valve seat and opens the gas outlet, allowing gas to flow out.

Therefore, in such conventional solenoid valves, the operating distance, or stroke, of the plunger needs to be increased as the controlled flow rate of gas increases, and since the stroke is proportional to the length of the coil, The coil plunger is large and the coil plunger is long, which inevitably results in an increase in weight and size, and the structure itself becomes complicated, resulting in an unavoidable increase in cost.

(Purpose of the invention) This invention addresses these conventional problems.The first purpose is to cope with the diversification of specifications, simplify the manufacturing process, facilitate standardization, and improve reliability. Another purpose is to provide a solenoid valve for high liquid control, which can obtain the required stroke by the strength of the permanent magnet, and by simplifying the configuration of the coil part, this type of valve is small and inexpensive. An object of the present invention is to provide a solenoid valve.

(Structure of the invention) In order to achieve the above object, the solenoid valve of the invention has a case body 1 having an inlet 2 on one side and an outlet 3 on the other side, and a fixed body made of an iron piece of a permanent magnet. 12 and a movable body 13 are provided to face each other, a valve rubber 6 is attached to an end of the movable body 13, and the valve rubber is actuated by magnetic force to open and close the valve port 5. body 12
A disc-shaped coil 9 made by winding a continuous flat wire of conductive metal into a disc shape is interposed between the opposing parts between the movable body 13 and the movable body 13. It is formed by molding and integrally embedding it in a part of the cover plate 8 made of a molded body of magnetic material.

A movable body 13 made of a permanent magnetic iron piece
It is preferable that the guide portion 11 is a concave vertical hole formed on the inner surface of the lid body 8.

(Example) In Fig. 1, 1 has a gas inlet 2 at one end,
A case body having a gas outlet 3 at the other end,
Therein, there is a gas passage 4, a valve port 5, and a valve seat 7 with a valve rubber 6 disposed opposite the valve port to open and close the gas passage.
to form an integral part.

A cover plate 8 is fitted into the upper opening of the case body 1 and detachably fixed with a set screw 15.

The cover plate 8 is made of non-magnetic metal or plastic, and a disk-shaped coil 9 is embedded within its thickness. This disk-shaped coil 9 is wound into a thin plate shape so as to have a flat expanse. Lead wires 9a are extended to both ends of the coil and are connected to a power source.

A cylindrical box 10 is formed on the top surface of the lid plate 8, and a concave guide portion 11 is formed on the bottom surface, and a fixed body 12 made of a permanent magnet is press-fitted into the box 10 and fixed immovably. A movable body 13, which is also made of a permanent magnet and has a valve rubber 6 attached to its lower end, is loosely fitted into the concave guide portion 11 so as to be vertically slidable. The two magnet bodies 12 and 13 are arranged such that their respective magnetic pole end faces face each other with the thin plate coil 9 sandwiched between them so that they attract or repel each other.

In the embodiment shown in FIG. 1, both bodies 12 and 13 are
are set so that they repel each other, and the valve rubber 6 is pressed against the valve seat 7 by the repulsive magnetic force.

The coil 9 may be a flat spring such as a mainspring spring, a linear coil, or a printed wiring coil.

(Operation and Effect) When the coil 9 is not energized, the movable body 13
Since a repulsive force is acting on the fixed body 12,
The valve rubber 6 is pushed downward, and the valve rubber 6 is pressed against the valve seat 7 by the repulsive magnetic force. Therefore, Benguchi 5
Since it is blocked, gas cannot flow out and it is in a stopped state.

In this state, when a current is applied to the coil 9 (preset in advance so that the current flows in the direction that attracts the movable body 13), the magnetic force from the fixed body 12 as a permanent magnet is interrupted, and at the same time, the magnetic force due to the current acts. The repulsive magnetic force disappears and becomes an attractive magnetic force, so that the movable body 13
is attracted to the coil side, that is, the fixed body 12 side. Therefore, the valve rubber 6 that has been pressed against the valve seat 7 is released at that moment, so the valve port 5 opens and the gas from the gas inlet 2 passes through the passage 4 to the gas outlet 3.
leaks to. In this way, gas opening and closing can be controlled by the presence or absence of current supplied to the disc-shaped coil.

In the present invention, a disk-shaped coil 9 made by winding a continuous flat wire of conductive metal into a disk shape is interposed between the opposing parts of the fixed body 12 and the movable body 13. Since the disc-shaped coil 9 is molded into a part of the cover plate 8 made of a non-magnetic molded body and embedded integrally, the disc-shaped coil 9 is a thinner disc made of a flat wire compared to a conventional coil formed in the shape of a cylindrical core. Since the shaped coil is interposed between the fixed body and the movable body, the structure is simple and lightweight, and the magnetic force of the two permanent magnets can be used as is, and the magnetic force can be freely controlled by cutting off the current to the coil. It is possible to provide a highly reliable product at a low cost as a solenoid valve for gas, which can be controlled, has a small stroke of the valve rubber, and has accurate operation. In addition, since the disk-shaped coil 9 is molded into a part of the cover plate 8 made of a molded non-magnetic material and is embedded integrally, the winding state of the coil is stable and there is no need for the coil to accidentally lose its shape. Since it is not exposed inside the valve chamber and does not come into contact with gas etc., there is no fear of corrosion, and it also has the effect of ensuring insulation and increasing stability.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view of a solenoid valve showing an embodiment of the present invention, and FIG. 2 is a plan view thereof, in which a disc-shaped coil portion is partially shown in cross section. FIG. 3 is a vertical sectional side view of a conventional type solenoid valve. 1...Case body, 2...Inflow port, 3...Outflow port, 5...Valve port, 6...Valve rubber, 7...Valve seat, 8
... Lid plate, 9 ... Disc-shaped coil, 10 ... Box body,
11...Guiding part, 12...Fixed body, 13...Movable body.

Claims (1)

[Claims for Utility Model Registration] (1) A fixed body 12 made of a permanent magnetic iron piece and a movable body 13 are placed opposite each other in a case body 1 having an inlet 2 on one side and an outlet 3 on the other side. In this valve device, the valve rubber 6 is attached to the end of the movable body 13, and the valve rubber is made to respond by magnetic force to open and close the valve port 5. A disc-shaped coil 9 made by winding a continuous flat conductive metal wire into a disc shape is interposed between the opposing parts, and this disc-shaped coil 9 is made of a non-magnetic molded body. Lid plate 8
A solenoid valve characterized by being molded and integrally buried in a part of the solenoid valve. (2) The movable body 13 made of an iron piece of the permanent magnet,
The solenoid valve according to claim 1, which is fitted into a guide portion 11 that is a concave vertical hole formed on the inner surface of the lid body 8.