JPS5911130B2 - pressure controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure controller that can control the pressure of fluid by electromagnetic force, and an object of the present invention is to make the governor part and the electromagnetic force generation part detachable, so that the conventional governor part can be used as is. The purpose of this paper is to provide a method for realizing an electromagnetic pressure controller.

5 Figure 1 shows a conventional example.

1 is a fluid inlet, 2 is an outlet, 3 is a valve seat, 4 is a valve body, and 5 is a diaphragm, which constitute a governor section.

A coil 6, a plunger 1, and a yoke 8 constitute an electromagnetic force generating section.

The force of the plunger 7 is transmitted to the valve body 4 via the push rod 9 and the fastening pin 11. 10 is a leaf spring that lifts and supports the plunger upward.

In this configuration, when a current is passed through the coil 6, a downward electromagnetic force is generated in the plunger T depending on the magnitude of the current.
The difference between the upward force of the leaf spring 10 acts on the 15 diaphragm 5 and the valve body 4 fastened to the diaphragm, and controls the pressure of the fluid flowing out from the fluid outlet 2 according to the well-known governor principle.

In this conventional example shown in FIG. 1, the plunger 7 is supported at the upper end by a cantilevered leaf spring 10, and at the lower end is rotatably fastened to the shaft of the valve body 4 fastened to the diaphragm 5 by a pin 1120. . FIG. 2 shows a known spring-loaded governor.

1 to 5 are the same as in Fig. 1, 11 is a spring, 12 is a body, 13 is a plug, and 14 is a screw.

Governors with a 25-lever structure are widely used in gas appliances, and even if the inlet pressure changes, the outlet pressure is controlled by the spring 11.
It acts to keep the pressure constant at the predetermined pressure set in . As is clear from Fig. 1 and Fig. 2, the conventional example No. 30
The disadvantage of Figure 1 is that the plunger 7 is cantilevered at the upper end by the leaf spring 1.
0, it is necessary to fasten and support the lower end with pin 11. Therefore, when changing a gas appliance that uses a spring type governor to an electromagnetic pressure controller as shown in Figure 2, the governor part must also be integrated. The problem is that it needs to be replaced, and even if a new one is manufactured, the parts cannot be shared with the spring type governor.

A: In the present invention, an electromagnetic pressure controller can be easily realized by loosening the screw 14 of the conventional spring type gas governor shown in Fig. 2, removing the plug 13 and spring 11, and installing an electromagnetic force generating section. It is something that can be done.

An embodiment of the present invention is shown in FIG. 3 below.

A fluid inlet 1, an outlet 2, and a valve seat 3 are formed in the body 12, and a diaphragm 5 is attached to the body 12. A valve body 4 is fastened to the diaphragm and faces the valve seat 3, forming a governor section as shown in FIG. do.

The upper center of the valve body 4 passes through the diaphragm 5 and is in contact with the lower end surface of a push rod 9 fastened to the plunger 7. The center upper part of the valve body 4 is formed into a substantially hemispherical convex surface, and the lower end surface of the push rod 9 fastened to the plunger 7 is formed into a flat surface. This is a structure in which the electromagnetic force generating part is brought into contact with the flat part of the lower end surface of the movable body. The plunger 7 includes the coil 6 and the yokes 8, 8' and constitutes an electromagnetic force generating section. Furthermore, the plunger 7 is supported coaxially with the coil 6 by two leaf springs 10 supported at both ends at the upper and lower parts, and moves up and down without sliding. 15 and 16 are upper and lower leaf spring mounting bases, respectively.

Then, it is fastened to the lower leaf spring mounting base 16 with screws 18 from the connector 13 which has a built-in spring 17 for adjusting the operating point.
The electromagnetic force generator is assembled. The electromagnetic force generating section and the governor section are removably fastened together with a screw 14 via a diaphragm retainer 11. Here, the diaphragm retainer 11 is necessary to make the length of the leaf spring 10 as long as possible relative to the outer diameter of the diaphragm 5, and depending on the dimensional relationship, the leaf spring mounting base 16 may hold the diaphragm retainer 11 as much as possible. It is also possible to serve as both.

Next, the operation of the present invention will be explained.

When current is passed through the coil 6, an electromagnetic force is generated, which acts to push the plunger 7 downward, and acts on the valve body 4, that is, the diaphragm 5, via the push rod 9.

This electromagnetic force changes depending on the magnitude of the current. Now consider an equilibrium state in which fluid at pressure P1 flows in from fluid inlet 1 and fluid at pressure P2 flows out from fluid outlet 2. The diameter of the valve seat 3 is DVl The effective diameter of the diaphragm is Ddl The electromagnetic force is Fml The force of leaf spring 10 is FPL The force of spring 17 is F
Let it be s. π πFm+Fp+F
s+-4D6・P1-′4Dpi・P,+here Dd-D
In other words, the fluid outlet pressure P2 is determined by the electromagnetic force Fm, the force Fp of the leaf spring 10, and the force Fs of the spring 17.

Therefore, if Fm is changed by changing the current, P2 will change. For example, if this is applied to control the pressure of gas supplied to a gas burner of a gas appliance, it becomes possible to control the amount of gas burned. The plunger 7 and the push rod 9, which are structurally movable bodies of the electromagnetic force generating section, are supported by two plate springs 10 so as to be able to move up and down without sliding, and the center upper end of the valve body 4 is formed into a substantially hemispherical convex surface. By forming the valve body into contact with the lower end flat surface of the push rod 9, there is no sliding friction, and the electromagnetic force acts faithfully on the valve body 4, resulting in operation with little hysteresis and faithfully responding to the magnitude of the current. An electric pressure controller capable of secondary pressure control becomes possible. At the contact portion between the upper part of the governor valve element 4 and the lower part of the push rod 9 of the electromagnetic force generating unit movable body, the center upper end of the valve element 4 is formed into a substantially hemispherical convex surface, thereby reducing the force applied to the valve element 4. The point of application is stabilized, and stable pressure control characteristics can be obtained. In the case of a configuration in which two planes are in contact with each other, if one of the planes is even slightly inclined, there will be a large shift in the point of force application of the contact parts, and the control characteristics will likely become unstable. As described above, the pressure controller of the present invention provides the following effects.

(1) A body that forms a fluid passage, a diaphragm that receives pressure from the fluid, and a valve seat formed on the body;
The upper end of the governor section, which is made up of a valve body that faces this valve seat and is fastened to a diaphragm, is formed into a substantially hemispherical convex surface, and the movable body of the electromagnetic force generation section, which consists of a coil and a yoke, is fixed by two leaf springs. The lower end surface of the movable electromagnetic force generating part is formed into a flat surface, and is brought into contact with the convex surface of the valve body, and the governor part and the electromagnetic force generating part are provided in a detachable manner. Since the valve body is configured to be driven by the electromagnetic force generated in the electromagnetic force generating section, there is no sliding friction, smooth operation, and little hysteresis, and a stable secondary pressure that corresponds to the magnitude of the current can be obtained. This has the effect of making it possible to realize an electric pressure controller.

(2) Since the governor part has a substantially hemispherical convex surface in contact with the valve body, and the movable body contact part in the electromagnetic force generation part has a flat surface, the point of application of force to the valve body is stable, making it smooth and stable. It is possible to obtain pressure control characteristics that are as follows.

(3) The movable body of the electromagnetic force generating section is supported by two leaf springs, and the electromagnetic force generating section that applies force to the governor section is detachable, making it easy to replace conventional spring-type governors with electricity. Can be changed to a type pressure controller.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional pressure controller, FIG. 2 is a cross-sectional view of a well-known spring type governor, and FIG. 3 is a cross-sectional view of a pressure controller according to an embodiment of the present invention. 1...Fluid inlet, 2...Fluid outlet, 3
... Valve seat, 4... Valve body, 5...
・Diaphragm, 6... Coil, 7...
・Plunger, 8... Yoke, 10...
- Leaf spring, 17... Spring.

Claims (1)

[Claims] 1. A governor section comprising a body forming a fluid passage, a diaphragm receiving the pressure of the fluid, a valve seat formed on the body, and a valve body facing the valve seat and fastened to the diaphragm. and has an electromagnetic force generating section consisting of a coil and a yoke, a movable body of the electromagnetic force generating section is supported by two plate springs so as to be vertically movable without sliding, and the electromagnetic force generating section generates the electromagnetic force generated by the electromagnetic force generating section. The valve body is configured to be driven by an electromagnetic force, and the upper end surface of the governor valve body is formed into a substantially hemispherical convex surface, and the lower end surface of the electromagnetic force generating unit movable body is formed into a flat surface and brought into contact with the A pressure controller with a governor section and an electromagnetic force generating section that are detachably installed.