JPS6344669Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas flow rate regulator for adjusting firepower in gas appliances such as gas stoves.

This type of gas flow regulator is often of the so-called needle valve type, in which the flow rate is adjusted by moving a rod-shaped valve element in the axial direction relative to the valve seat, but there is a minimum flow hole to ensure the minimum flow rate. It is installed on the valve body, and it is necessary to replace the valve body when the type of gas is changed, and the task of replacing the valve body, which is linked to the adjustment movement mechanism, is quite troublesome.
It was difficult to proceed with the work efficiently.

This invention was developed with the aim of providing a gas flow regulator that can be replaced extremely easily, and has a valve section at the tip and is movable in the axial direction. A supported rod-shaped valve body is provided in the inlet side gas chamber communicating with the gas inlet, and a valve seat corresponding to the valve body is provided on the end face, and a flow path in the valve seat communicating with the gas outlet is provided inside. In a gas flow regulator equipped with a fixed member, the valve portion of the valve body is made of a bare rod, a minimum flow hole is provided in the side wall of the fixed member passing through the rod, and the flow path in the valve seat is formed as the minimum flow hole. It is characterized by communicating with the inlet side gas chamber through the outer peripheral surface of the valve seat. That is, since the minimum flow hole is provided in a fixed member unrelated to the moving mechanism, removal and installation operations can be easily performed.

Next, the present invention will be specifically explained with reference to an illustrated embodiment.

FIG. 1 is a sectional view, and FIG. 2 is an exploded perspective view of the moving mechanism, in which 1 is the main body of the regulator, 2 is a valve body, and 3 is a fixing member. The main body 1 has a gas inlet 4 and a gas outlet 5
It has a substantially cylindrical shape with a shaft hole 6 formed at its lower end. The valve body 2 is a needle valve made of a solid rod with a valve portion 7 at its tip, and is supported so as to be movable in the axial direction by inserting an O-ring 8 into a shaft hole 6 of the main body 1. The fixing member 3 is a bottomed cylindrical member having a valve seat 9 corresponding to the valve portion 7 on the end face, and is inserted from the upper end of the main body 1 and is prevented from coming out by a falling-off preventing means 10 such as a pin or screw. . Two O-rings 11 and 12 are fitted to the fixing member 3, and the inside of the main body 1 is divided into an inlet gas chamber 13 communicating with the gas inlet 4 and an outlet gas chamber 14 communicating with the gas outlet 5. The valve body 2 is located within the inlet gas chamber 13, and the valve seat flow path 15 inside the fixed member 3 communicates with the outlet gas chamber 14 through a hole 16 penetrating the side wall. Also, the valve seat 9 of the fixed member 3
A minimum flow hole 17 is bored in the side wall of the portion near the valve seat, and the flow path 15 in the valve seat is connected to the inlet side gas chamber through the gap 18 formed between the outer peripheral surface of the valve seat 9 and the inner wall of the main body 1. It is connected to 13. Reference numeral 19 denotes a spring that applies a biasing force to the valve body 2 in the direction of the fixing member 3.

21 is a guide member fixed to the lower end of the main body 1, 22 is a rotatably supported adjustment ring, and the guide member 21 has a lower member 21a having a cam surface 23a formed by cutting the upper end surface of a cylinder in a spiral shape. ,
The upper member 21b has a corresponding spiral cam surface 23b, and a spiral slit 23 is formed between the cam surfaces 23a and 23b when assembled. It is located at the outer periphery of the lower end of the . The adjustment ring 22 is located on the outer periphery of the slit 23, and has an axial longitudinal groove 24 formed on the inner circumference, and a gear portion 25 on the outer periphery.
This gear portion 25 meshes with a selector gear (not shown) driven by a heat adjustment lever or the like, and rotates in response to an adjustment operation. Valve body 2
An engaging pin 26 is provided at the lower end of the ring 26 and extends outwardly through the diametrical direction. engaged.

Since it is configured as described above, when the adjustment ring 22 is rotated to adjust the firepower,
The engagement pin 26 is pushed by the vertical groove 24 to rotate the valve body 2, and as the engagement pin 26 rotates, the engagement pin 26 moves spirally along the slit 23, so the valve body 2 moves in the axial direction. The distance between the valve portion 7 and the valve seat 9 changes, and the gas flow rate is adjusted. The movement of the valve portion 7 toward the valve seat 9 is reliably performed by the biasing force of the spring 19 and the taper of the cam surface 23a. When the valve part 7 is in close contact with the valve seat 9, the inlet side gas chamber 13 and the outlet side gas chamber 14 are communicated through the gap 18, the minimum flow hole 17, and the valve seat internal flow path 15. Flow rate is ensured. When it is necessary to change the minimum flow rate depending on the type of gas, etc., the fixing member 3 may be replaced with another fixing member 3 having a minimum flow hole 17 of a different size. Note that, as in this embodiment, the fixing member 3
If the fixing member 3 is not directly screwed onto the main body 1 but is fixed to the main body 1 using a retaining means 10 such as a pin, attachment and detachment of the fixing member 3 itself becomes easy.

As mentioned above, in this invention, the minimum flow hole is provided in the fixed member, and the inlet gas chamber and the outlet gas chamber are communicated through this hole, so in order to change the minimum flow rate, the flow rate adjustment is necessary. All that is required is to replace the fixing member that is unrelated to the moving mechanism used to perform this, and the work can be done easily and efficiently.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the main parts. 1...Main body, 2...Valve body, 3...Fixing member, 4
...Gas inlet, 5...Gas outlet, 7...Valve section, 9
... Valve seat, 13 ... Inlet side gas chamber, 14 ... Outlet side gas chamber, 15 ... Valve seat internal flow path, 17 ... Minimum flow hole.

Claims (1)

[Claims for Utility Model Registration] A rod-shaped valve body having a valve portion at the tip and supported movably in the axial direction is provided in the gas chamber on the inlet side communicating with the gas inlet, and is compatible with the above-mentioned valve body. In a gas flow regulator equipped with a fixed member that has a valve seat on the end face and a flow path inside the valve seat that communicates with the gas outlet, the valve portion of the valve body is made of a bare rod, and the fixed member is A minimum flow hole is provided in the side wall and passes through it.
A gas flow regulator that communicates the flow path inside the valve seat with the inlet gas chamber through the minimum flow hole and the outer circumferential surface of the valve seat.