JPH0420709A - Valve opening degree regulating mechanism for gas equipment - Google Patents

Abstract

PURPOSE:To provide a valve opening degree regulating mechanism for gas equipment which can be adjusted in the state of minute valve opening, is excellent in the easiness of operation, and simplified in structure by energizing a cam plate in the direction of its retreat and providing a spring means which is set in a small initial deflection value so as to counteract the valve shaft. CONSTITUTION:When the knob 3 of equipment is turned in the condition that the gas of a gas vessel B is discharged into a valve chamber 19, a cam plate 5 advances toward the main body according to the angle of the rotation. As it advances an actuation shaft 7 advances toward a diaphragm through a spring means 10 on one hand and pushes the valve shaft 14 so that an 0-ring 18 is separated from the valve seat and the gas flows through a gas channel from the valve chamber 19 through an open hole 15 and a pressure regulating chamber 9 to the combustion section. The actual force to push the valve shaft 14 is under the action of two springs 10 and 20, and one spring means 10 consists of a conical spring and the other spring means 20 a cylindrical coil spring. Since they both have spring characteristics suitably set, their initial deflection values are small. Accordingly in the state in which the gas flow rate is small, the distance of movement of the valve shaft is small especially against the amount of rotation of the knob 3 and the con-trol of the gas flow rate becomes easy. The degree of freedom in cooking, etc. is thereby increased, the fuel can be saved, the operation is easy, and the structure simplified.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a valve opening adjustment mechanism for gas appliances, and is particularly applicable to small valve opening states such as simmering or low heat on a stove. This makes it possible to exhibit good characteristics.

(Prior Art) This type of gas appliance is equipped with a valve that is opened and closed by attaching and detaching the gas container in the governor that adjusts the gas flow supplied from the gas container, and a valve that is provided in the gas passage separately from the valve. Usually, the opening/closing valve has a structure that is opened and closed by operating the stopcock with an instrument stopper knob.

(Technical issue) The above structure adjusts the valve opening according to changes in the cross-sectional area of the circular opening of the valve, so it is possible to adjust the valve opening at or near full opening, but it is difficult to adjust it with a small amount of heat. I'm not good at it.

The present invention solves the above-mentioned problems, and its purpose is to provide a valve opening adjustment for gas appliances that allows fine adjustment of the valve opening state, improves operability, and has a simplified structure. The goal is to provide a mechanism.

(Technical Means) The object is to provide a rotary knob, a cam plate that moves forward in the axial direction by rotation of the knob, and an operating shaft that engages with the cam plate at its rear end and is connected to a diaphragm at its front end. , a valve shaft that is provided on the side of the pressure regulating chamber partitioned by a diaphragm, and that is in contact with the front end side of the operating shaft at one end and whose opening degree is adjusted by rotation of a knob; and a valve shaft that is compressed between the diaphragm and the cam plate. This can be achieved by a configuration including a spring means interposed therein, which biases the cam plate in the backward direction and has a small initial deflection amount so as to oppose the valve shaft.

(Example) This will be explained below with reference to the drawings.

FIG. 1 shows a cross section of a main part of a gas appliance incorporating an adjustment mechanism according to the present invention, in which 1 is a governor body, 2 is a cover thereof, and 3 is an appliance plug rotatably supported on the governor cover 2. a knob 4, a cam 5 provided on the circumferential end surface of the knob 3;
indicates a cam plate that is pushed axially forward along the cam. A through hole 6 passes through the center of the cam plate 5, into which an operating shaft 7 fitted from the rear side is engaged and extends forward, and the front surface is cut into a concave shape, and a spring means to be described later is installed therein. 10 is in contact with one end.

A diaphragm 8 is a flexible membrane-like member provided between the main body 1 and the cover 2 to partition and seal the pressure regulating chamber 9 on the main body side. The tip of the operating shaft 7 is connected to the center of the diaphragm 8, and moves together in the axial direction. 1
Reference numeral 1 denotes a retainer located outside the diaphragm 8 and secured to a stepped portion near the tip of the operating shaft. Reference numeral 12 denotes a spacer located on the pressure regulating chamber side with the diaphragm 8 in between. It is fixed to the actuating shaft 7 by a caulking deformable portion 13. Since the diaphragm 8 is fixed by caulking the tip of the actuating shaft 7, thread cutting when screwing,
Nuts etc. are no longer required.

Such a diaphragm 8 is loaded by a pair of spring means 10.20 acting on both sides.

One spring means IO is interposed between the diaphragm 8 and the cam plate 5, and is set to have a small initial deflection amount, and is composed of a conical coil spring having a large diameter on the diaphragm side and a small diameter on the cam plate side. The other spring means 20 is a cylindrical coil spring, both of which act as compression springs.

Reference numeral 14 denotes a valve shaft incorporated into the governor body 1, one end of which is in contact with the shaft end of the operating shaft 7, and is also elastically pushed from the other end via the valve opening member 17 when the gas container B is attached. 615
1 is a gas vent for inserting the valve shaft 14, and 16 is a valve seat member formed around the vent 15, which is connected to the valve chamber 1 of the main body.
9 and the pressure regulating chamber 9, and is opened and closed by an O-ring 18 that approaches and separates from the valve seat on the outlet side of the valve shaft 14. Therefore, it is only necessary to provide an O-ring mounting groove on the outer surface of the valve shaft (the sealing structure is significantly simplified. It is pushed toward the gas container by a spring 21 provided in between. 22
is a closing spring for the valve stem 14, and the nozzle n of the gas container B
The spring C is set to be stronger than the spring C that closes the spring C.

In each figure, 23 is a nozzle n provided outside the valve chamber 19.
The receiver is a mouth member having a mouth, and 24 is a magnetic holding mechanism for magnetically holding the container flange f. Further, 25 is a cam lever for a safety mechanism provided on the instrument stopper knob 3 on the outside of the governor cover, 26 is a piezoelectric unit holder provided on the governor cover 2,
Reference numeral 27 denotes a torsion spring placed between these two members, which urges the knob 3 in the opening direction via the cam lever 25. 2
8 is a wave spring that applies torque to the knob 3; 29 is a piezoelectric unit attached to the holder 26; 30 is a pin of a safety mechanism that the cam lever 25 can come into contact with or pass through; It can be touched or pressed.

(Function) In the gas appliance having the mechanism of the present invention configured as described above, when the nozzle n of the gas container B is inserted into the receiver opening of the governor main body and the container B is held magnetically by the magnetic holding mechanism 24, the gas is discharged into the valve chamber 19.

When the instrument plug knob 3 is turned in this state, the cam plate 5 advances toward the main body according to the rotation angle, and the operating shaft 7 advances toward the diaphragm via one of the spring means 10. Since the valve shaft 14 is pushed, the O-ring 18 is separated from the valve seat, and gas flows from the valve chamber 19 through the passage 15 and the pressure regulating chamber 9 to the combustion section (not shown).

By this knob operation, the valve opening degree, that is, the size of the gap created between the O-ring 18 of the valve stem 14 and the valve seat, can be changed.
The actual pushing force is under the action of two spring means 10, 20, one spring means 10 consisting of a conical coil spring and the other spring means 20 consisting of a cylindrical coil spring, with appropriately set spring characteristics. Because it has a small initial deflection. Therefore, when the gas flow rate is low, the amount of movement of the valve stem is small, especially with respect to the amount of rotation of the knob 3, making it easier to manage the flow rate.

(Effects) Therefore, according to the present invention, it is possible to easily adjust the degree of opening in the delicate valve opening state, and since delicate adjustments can be made, when applied to a stove, it is possible to cook with low or low heat. This increases the degree of freedom in operations, etc., and also saves fuel. Further, since the adjustment can be made by delicate rotation of the knob, operability is good, and since the valve stem is directly operated by the knob, significant practical effects such as structural simplicity can be obtained.

[Brief explanation of the drawing]

The drawings show an embodiment of the adjustment mechanism according to the present invention.
The figure is a cross-sectional side view of the main part, and FIG. 2 is a front view. 3... Knob, 5... Cam plate, 7... Operating shaft, 8...
...Diaphragm, 9...Pressure control chamber, 10.20...
Spring means, 14... Valve stem, 15... Gas vent, 18
...○-ring, 19...valve chamber, B...gas container.

Claims (4)

[Claims] (1) A rotary knob, a cam plate that advances in the axial direction as the knob rotates, an operating shaft that engages with the cam plate at the rear end and is connected to a diaphragm at the front end, and a diaphragm that separates the knob. a valve shaft provided on the pressure regulating chamber side, one end of which is in contact with the front end side of the operating shaft and whose valve opening degree is adjusted by rotation of a knob; and a cam plate that is interposed in a compressed state between the diaphragm and the cam plate. A valve opening adjustment mechanism for a gas appliance, comprising a spring means configured to have a small initial deflection amount so as to bias the valve in a backward direction and oppose the valve shaft. (2) The valve opening adjustment mechanism for a gas appliance according to claim 1, wherein the spring means is constituted by a conical coil spring having a large diameter on the diaphragm side and a small diameter on the cam plate side. (3) The valve opening adjustment mechanism for gas appliances according to claim 1, wherein the valve shaft is fitted into the gas vent and has an O-ring on its circumferential surface that contacts and separates from the valve seat on the vent side. . (4) At the connection between the actuating shaft and the diaphragm, a retainer is located outside the diaphragm and locks onto the stepped part of the actuating shaft, and a spacer is provided on the pressure regulating chamber side. 2. The valve opening adjustment mechanism for gas appliances according to claim 1, wherein the spacer is fixed.