JPH0525084U - Pressure proportional control valve - Google Patents

Abstract

(57) [Abstract] [Purpose] To connect a diaphragm and a tubular wall very easily and to increase the contact area of the tubular wall with the end face of the plunger. In a pressure proportional control valve, a pressure receiving plate 35 is provided on an open end of a cylindrical wall 32 that abuts a closed end wall 33 on an end surface of a plunger 22, and a closed end wall is provided on an axial center in the cylindrical wall. Is provided with a protruding shaft 34 that continuously projects from
A plurality of through windows 36 are provided around the cylindrical wall, and a cylindrical body 37 that is continuous from the center of the diaphragm and is pushed into the outer side of the protruding shaft and the inner side of the cylindrical wall is provided. Further, a protrusion 38 is provided which is fitted into the through window and locked when the diaphragm overlaps the pressure receiving plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pressure proportional control valve for controlling the gas supply amount of a gas combustion appliance such as a gas stove.

[0002]

[Prior Art]

 Conventionally, in a pressure proportional control valve of a type in which a plunger is moved by exciting a coil, a pressure receiving plate 1 and a diaphragm 2 are provided at a tip of a stud shaft 3 as shown in FIG. The clamp ring 5 is forcibly fitted to the outside, and it is sandwiched and fixed. At the same time, the end face of the stud 3 is abutted against the end face of the plunger 6, and the slide of the plunger 6 accompanying the excitation of the coil 7 is struck. It is adapted to be transmitted to the valve rod 8 via 3.

[0003]

[Problems to be solved by the device]

 According to the above-mentioned structure, since the retaining ring is used for fixing, the work of pushing the retaining ring using an instrument requires a great deal of work.

Further, the contact area between the plunger and the stud shaft is remarkably small, and when a commercially available stud shaft is used, the flatness of the terminal is poor and the diaphragm tilts to make the pressure unstable. For this reason, it is necessary to perform a cutting process for obtaining good flatness on the end surface of the tack shaft.

Therefore, an object of the present invention is to provide a pressure proportional control valve capable of extremely easily fixing the diaphragm to a pressure receiving plate having a large-diameter shaft member that abuts the distal end surface of the plunger. That is.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention forms a magnetic path around a coil wound around a bobbin by a frame, a base plate and a plunger, and moves the plunger by energizing the coil. Pressure ratio of the type in which the diaphragm transmits to the valve stem to open the valve Example In a control valve, the closed end wall surface is brought into contact with the end face of the plunger. Tip of the cylindrical wall. A plate is provided, a projecting shaft that projects from the closed end wall is provided on the shaft core in the tubular wall, and a plurality of through windows are provided around the tubular wall. A cylindrical body that is continuous from the center and is pushed into the outer side of the protruding shaft and the inner side of the cylindrical wall is provided, and when the diaphragm overlaps the pressure receiving plate on the outer periphery of the tip edge of the cylindrical body, it is fitted into the through window. Adopts a configuration with a protrusion to stop One in which the.

[0007]

[Action]

 First, the tip of the protruding shaft is fitted into a cylindrical body integrated with the diaphragm, and then the cylindrical body is forced into the gap between the protruding shaft and the cylindrical wall, and the diaphragm is superposed on the pressure receiving plate.

When the diaphragm overlaps with the pressure receiving plate, each projection of the tubular body pushed into the gap between the protruding shaft and the tubular wall fits into the through window and the compression by the inner surface of the tubular wall is released. Therefore, the projection is automatically fitted and locked in the through window. As a result, the tubular body is prevented from being detached from the tubular wall, and the diaphragm is fixed to the pressure receiving plate.

[0009]

【Example】

 An embodiment according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, a coil 24 is wound around a bobbin 23 into which a plunger 22 is slidably inserted in a passage 21 of a shaft core.

A magnetic path is formed around the coil 24 by the frame 25, the base plate 26, and the plunger 22, and when the coil 24 is energized, the plunger 22 slides.

In order to transmit the slide of the plunger 22 from the diaphragm 27 to the valve rod 28, the valve element 29 of the valve rod 28 is released (opened) from the valve seat 31 provided in the middle of the flow path 30. Makes the closed end wall 33 of the tubular wall 32 abut the end face of the plunger 22, and the protruding shaft 34 that continues from the center of the end wall 33 and projects from the tip opening of the tubular wall 32 and abuts the valve rod 28. , A flange-shaped pressure-receiving plate 35 which is continuous from the entire circumference of the front end opening edge of the tubular wall 32 and overlaps with a portion of the diaphragm 27 excluding the peripheral edge portion on one side is integrally provided (synthetic resin molded product), and A cylindrical body in which a plurality of through windows 36 are provided on the peripheral wall, and the protruding shaft 28 is closely fitted in the center of the diaphragm 27 and is pushed into the gap between the outer periphery of the protruding shaft 28 and the inner periphery of the cylindrical wall 32. 37 is the above diaphragm When the pressure receiving plate 35 overlaps with the diaphragm 27 as the cylindrical body 37 is pushed, the pressure receiving plate 35 is restored to the corresponding through windows 36 when the cylindrical body 37 is pushed in. A protrusion 38 is provided to be fitted and locked.

With the above structure, the tip of the protruding shaft 34 is fitted into the cylindrical body 37, and the cylindrical body 37 is forcibly inserted into the gap between the outer circumference of the protruding shaft 34 and the inner circumference of the cylindrical wall 32. Then, the diaphragm 27 is superposed on the pressure receiving plate 35.

At this time, since the projections 38 of the tubular body 37 pushed into the gap between the protruding shaft 34 and the tubular wall 32 and the through window 36 are aligned with each other, the inner surface of the tubular body 37 allows the protrusions up to the previous state. The compressed protrusion 38 is restored and fits into the through window 36 to engage.

Therefore, the cylindrical wall 32 is coupled to the diaphragm 27, and the outer circumference of the protruding shaft 34 and the inner circumference of the cylindrical wall 32 press the cylindrical body 37 to keep it airtight.

In the figure, 41 is a spring that pushes back the valve element 29 in the valve closing direction, and 42 is a through hole that connects one side of the chamber 43 divided by the diaphragm 27 and the downstream side flow passage 30 of the valve seat 31.

[0017]

As described above, according to the pressure proportional control valve according to the present invention, by pushing the tubular body of the diaphragm between the tubular wall and the protruding shaft, the through window and the projection are fitted and engaged. The diaphragm and the tubular wall can be connected to each other very easily, and the cylindrical body can be pressed by the protruding shaft and the tubular wall to keep airtightness.

Further, since the diameter of the cylindrical wall having the protruding shaft is increased, the contact surface area of the end face of the plunger is significantly increased. Therefore, it is possible to prevent the diaphragm from tilting and stabilize the pressure.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view showing a main part of the same.

FIG. 3 is a vertical sectional front view of a conventional product.

[Explanation of symbols]

 21 passage 22 plunger 23 bobbin 24 coil 25 frame 26 base plate 27 diaphragm 28 valve rod 29 valve body 30 flow path 31 valve seat 32 tubular wall 33 end wall 34 projecting shaft 35 pressure receiving plate 36 through window 37 tubular body 38 protrusion

Claims (1)

[Scope of utility model registration request] 1. A magnetic path is formed by a frame, a base plate, and a plunger around a coil wound around a bobbin, and when the coil is energized, the movement of the plunger is transmitted from a diaphragm to a valve rod to open. In a pressure proportional control valve of the valve type, a flanged pressure receiving plate protruding outward from the entire circumference of the open end of the cylindrical wall that abuts the closed end wall surface on the end surface of the plunger is provided. A projecting shaft that projects from the closed end wall is provided on the inner shaft core, and a plurality of through windows are further provided around the tubular wall. Further, a projecting shaft that is continuous from the center of the diaphragm and the outside of the projecting shaft is tubular. A cylindrical body to be pushed into the inside of the wall is provided, and a projection for fitting and locking the through window when the diaphragm overlaps the pressure receiving plate is provided on the outer periphery of the tip end edge of the cylindrical body. Pressure proportional control valve.