JPS599282Y2 - Gas flow control device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas flow rate control device for adjusting the thermal power of a gas burner, and an object of the present invention is to perform accurate flow rate control that is not affected by gas quality.

Conventionally, governors have been used to control the amount of gas supplied to gas burners.

This uses an external force to manipulate the force of the governor's backpressure spring to change the set amount of gas passing through it, and when combined with the pressure adjustment function of the governor's main button, stable and accurate flow rate control can be expected. It is.

However, the conventional flow rate control means described above lacks flexibility when changing gas quality, such as conversion from city gas to natural gas, and is not easy to use in this respect.

The present invention solves these conventional drawbacks, and embodiments thereof will be described below with reference to the accompanying drawings.

In Figures 1 and 2, 1 is a main body fixed to a substrate 2;
It has a gas stove 3 and a gas burner 4.

The main body 1 has a gas passage 5 leading to a gas burner (not shown), and a closure 6 of the gas stove 3 is provided on the upstream side of the gas passage 5, and a governor 4 is provided on the downstream side of the gas passage 5.

Further, the governor 4 has a structure in which a diaphragm 8 is displaced by the force relationship between the gas pressure and the back pressure spring 7, and a valve body 9 directly connected to the diaphragm 8 controls the degree of opening of the valve seat 10.

The spring 7 is received by a receiver 12 that is engaged with an actuator 11 that is vertically movable.
If the valve body 9 is pushed down and the valve body 9 is displaced downward via the spring 7, the degree of opening of the valve seat 10 increases and the set gas flow rate increases, and vice versa.

Of course, the set gas flow rate is maintained without variation by the governor's inherent pressure regulating function.

Next, the operating structure of the governor will be explained.

In FIGS. 1 and 3, reference numeral 13 denotes an operating body provided on the base plate 2 so as to be able to slide left and right, and 14 denotes an inclined main piece 16 having a bent piece 15 on the side, a biasing piece 17, and both of these pieces. 16. 1
7 is integrally formed with a connecting piece 18 made of a steel plate. Piece 1
7 has its free end locked in the elongated hole 20 of the operating body 13 in such a way that it is entirely flexible.

Then, due to the deflection of the biasing piece 17, the inclined main piece 16
is energized upwards.

On the other hand, a protruding piece 21 is provided on the operating body 13, and the tip of a screw rod 22 screwed onto the protruding piece 21 is engaged with the upper surface of the free end of the main inclined piece 16.

The tip of the actuator 11 of the governor 4 is inclined at the main piece 16.
This corresponds to the bottom surface of .

In the above structure, by sliding the operating body 13 from side to side, the main piece 16 of the inclined body 14 changes the force of the spring ring 7 of the governor 4, that is, the back pressure, through the actuator 11, thereby controlling the gas flow. It is possible to control the amount of passage.

By the way, as is well known, the pressure of city gas and natural gas is different. For example, when changing from city gas to natural gas by gas quality conversion, if the angle of inclination of the main piece 16 of the inclined body 14 remains the same, the pressure of natural gas will change. Since the gas flow rate is high, a small amount of sliding of the operating body 13 causes a large change in the gas flow rate.

In other words, the operational variable range for adjusting the gas flow rate is different between city gas and natural gas, which is very inconvenient for the user.

However, in the above structure, when converting to natural gas, the free end of the main piece 15 may be pushed down via the threaded rod 22 to reduce its inclination angle (as shown by the dashed line in FIG. 3).

As a result, in the case of natural gas, the adjustment stroke width of the actuator 11 is reduced in accordance with the properties of natural gas, so that the gas flow rate can be controlled within the same operating range as city gas.

As shown in FIG. 3, it is also conceivable to provide a display section 23 so that the inclination angle of the main piece 15 can be accurately set depending on the gas quality.

Further, since the main piece 16 has a bent piece 15 on its side, it does not bend.

As described above, according to the present invention, it is possible to adjust the delicate movement of the diaphragm with a simple structure of making the bent piece have an inclination, bring it into contact with the actuator, and adjusting the inclination using the screw rod. Not only can the gas flow rate be controlled accurately and without variation, but the same operating range can be obtained even when changing gas quality.

Therefore, it is possible to prevent an accident in which the gas burner goes out due to excessively restricting the gas flow rate, and safety effects can also be expected.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a gas flow rate control device showing an embodiment of the present invention, FIG. 2 is a sectional view, and FIG. 3 is a front view of the main parts. 4... Gas governor, 7... Back pressure spring, 11... Operator, 13... Operation body, 14... Inclined body, 15... bending piece, 16... inclined main piece, 17... biasing piece, 18... connecting piece, 22...... Screw rod.

Claims (1)

[Scope of utility model registration request] a gas cabana that controls a gas flow rate; a substrate that fixes the gas governor; and an operating body that is slidable with respect to the substrate;
an actuator linked to a back pressure spring of the gas governor; a bending piece having an inclined part in contact with the upper end of the actuator, the lower end of the inclined part serving as a fulcrum and provided on the operating body; 1. A gas flow rate control device comprising a balance scale that comes into contact with an upper end of a curved piece to adjust the inclination of the new curved piece, and configured to control a gas flow rate by sliding the operating body.