JPH076577U - solenoid valve - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the valve seat from being deformed under the weight of the plunger. [Structure] A spring bearing plate 1 which is applied to the upper surface of a valve seat 11.
As shown in (B), the central portion of 3 is formed with a horizontal hole 15 through which the mounting flange 10 at the lower end of the plunger 7 can be inserted in an oblique posture, and a vertical hole 16 for releasing the connecting rod 10. Abbreviation T
A letter-shaped insertion hole 14 is formed. Plunger 7
In the vertical position, since the insertion hole 14 of the spring receiving plate 13 cannot be inserted and is locked, the load of the plunger 7 acts on the entire valve seat 11 via the spring receiving plate 13 when the valve opening 5 is closed. However, the valve seat 11 is prevented from acting on only the central portion of the valve seat 11, and the valve seat 11 is not bent and deformed even if the plunger 7 is heavy.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electromagnetic valve using a large solenoid, which is improved so as to prevent the valve seat from being deformed by the weight of the plunger.

[0002]

[Prior art]

 An example of a conventional solenoid valve will be described with reference to FIG. 1 showing an embodiment of the present invention. A vertical valve port 5 is formed between the inflow port 2 and the outflow port 3 in the body 1, and a solenoid 6 having a plunger 7 projecting downward is attached directly above the valve port 5, and the lower end surface of the plunger 7 is attached. A rubber valve seat 11 is fitted to a mounting flange 10 protruding from the valve so as to surround the mounting flange 10, and a spring bearing plate 13 applied to the upper surface of the valve seat 11 is provided with a solenoid 6 The one end side of the compression coil spring 18 attached to the lower surface is in contact.

Then, the valve seat 11 is always pressed by the weight of the plunger 7 and the elastic force of the compression coil spring 18 against the valve mouth 5 to close the valve mouth 5 and excite the solenoid 6. Is pulled toward the core 8 side against the elasticity of the compression coil spring 18 and the valve seat 11 is separated upward, so that the valve port 5 is opened.

In such an electromagnetic valve, the mounting collar 10 of the plunger 7 into which the valve seat 11 is fitted can hold the valve seat 11 as firmly as possible and can be manufactured easily. It is desirable to form the same diameter as. On the other hand, since the spring bearing plate 13 needs to be passed through the mounting flange 10 or the plunger 7 when assembled, the conventional spring bearing plate 13 is formed with a large-diameter insertion hole that loosely fits in the mounting flange 10 or the plunger 7. It had been.

[0005]

[Problems to be solved by the device]

 By the way, when the spring receiving plate 13 is formed with the insertion hole into which the plunger 7 is loosely fitted as described above, the lower end surface of the plunger 7 does not come into contact with the spring receiving plate 13 when assembled into the solenoid valve, and the load thereof is not applied. Acts directly on the central portion of the valve seat 11, and in particular, when the diameter of the plunger 7 is large and heavy, the load is deformed by the valve sheet 11 and the closing function of the valve port 5 is closed. Could be damaged.

Further, when such an electromagnetic valve is used for burner control, if an accident occurs in which the valve seat 11 is burned out by backfire from the burner, the plunger 7 is inserted into the insertion hole of the spring receiving plate 13. There was a risk that a large amount of gas would flow out through the gap between them.

[0007]

[Means for Solving the Problems]

 The solenoid valve of the present invention has been devised in view of the above points, and has an insertion hole into which a mounting collar can be inserted into a spring receiving plate and whose lip is locked to the lower end surface of the plunger. Is formed.

[0008]

[Operation and effect of the device]

 Since the lower end surface of the plunger is locked to the rim of the insertion hole of the spring receiving plate, the load of the plunger acts on the entire valve seat via the spring receiving plate, and only the center portion of the valve seat is different from the conventional case. It is possible to prevent the valve sheet from deforming even if the plunger is heavy. This allows it to perform its closing function over a long period of time.

Further, when an accident occurs in which the valve seat is burned down for burner control, the lower end surface of the plunger rests on the spring bearing plate seated at the valve opening, and the lower end surface of the plunger is mounted. Has the effect of closing the insertion hole of the spring receiving plate and minimizing the outflow of gas.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. A mounting flange 10 having the same radius as the plunger 7 is formed on the lower end surface of the plunger 7 via a small-diameter connecting rod 9, and the mounting flange 10 can be forcibly fitted to the valve seat 11. The fitting hole 12 is formed, and these structures are the same as the conventional one.

In the present embodiment, in particular, as shown in FIG. 2B, the lower end of the plunger 7 is located at the center of the spring bearing plate 13 made of an iron plate or the like having a high melting temperature, which is applied to the upper surface of the valve seat 11. A substantially T-shaped insertion hole 14 is formed by connecting a lateral hole 15 through which the mounting flange 10 can be inserted in an oblique posture and a vertical hole 16 for escape of the connecting rod 10.

This embodiment has such a structure, and when the valve seat 11 is assembled to the plunger 7, first, the connecting rod 9 is allowed to escape into the vertical hole 16 of the insertion hole 14 of the spring receiving plate 13 and the mounting collar. The mounting flange 10 is inserted into the lower surface side of the spring receiving plate 13 by tilting 10 and passing it straight through the lateral hole 15. After that, the valve seat 11 is forcibly fitted and mounted on the mounting flange 10 projecting from the lower surface of the spring bearing plate 13.

When the electromagnetic valve is configured as shown in FIG. 1 by the plunger 7, spring receiving plate 13 and valve seat 11 assembled in this way, the plunger 7 is attached to the spring receiving plate 13 abutted on the upper surface of the valve seat 11. Has a substantially T-shaped insertion hole 14 that cannot be inserted in the vertical posture, and the lower end surface of the plunger 7 is locked to the spring receiving plate 13. Therefore, as shown in FIG. At the time of formation, the load of the plunger 7 acts on the entire valve seat 11 via the spring bearing plate 13, and it is avoided that it acts only on the central portion of the valve seat 11, and the plunger 7 is heavy. Even if so, the valve seat 11 is prevented from being bent and deformed.

As a result, the function of closing the valve opening 5 by the valve seat 11 can be ensured for a long period of time.

When this solenoid valve is used for burner control and an accident occurs in which the valve seat 11 burns out, the spring bearing plate 13 is seated on the valve opening 5 by the elasticity of the compression coil spring 18. As the plunger 7 falls on it, the insertion hole 14 of the spring bearing plate 13 is closed by the lower end surface of the plunger 7 as shown in FIG. It is kept to a minimum.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2A is a partially enlarged sectional view of the present embodiment, and FIG. 2B is a plan view of a spring receiving plate.

FIG. 3 is an exploded perspective view of an assembly portion of a plunger and a valve seat.

[Explanation of symbols]

1: Body 2: Inlet 3: Outlet 5: Valve mouth 6:
Solenoid 7: Plunger 10: Mounting collar 11: Valve seat 13: Spring receiving plate 14: Insertion hole 18: Compression coil spring

Claims (1)

[Scope of utility model registration request] 1. A solenoid provided with a plunger, which always protrudes downward by its own weight and which is attracted upward by excitation, is provided directly above a longitudinal valve opening provided between an inlet and an outlet of a body. A valve seat that is opened and closed by contacting and separating from the valve mouth is fitted to a mounting flange projecting from the lower end of the plunger so as to surround the mounting flange, and the valve seat is closed on the upper surface of the valve seat in the valve closing direction. In a solenoid valve having a spring receiving plate of a biasing spring applied thereto, the spring receiving plate is formed with an insertion hole through which the mounting flange can be inserted, and an edge of which engages with the lower end surface of the plunger. Characteristic solenoid valve.