JPH0321807B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tap for a gas burner, and in particular to a means for preventing gas leakage at the tap and for simply and effectively adjusting the maximum gas flow rate and the minimum gas flow rate. This product relates to a tap for a gas burner such as a gas range equipped with a gas stove.

[Prior art and its problems]

Generally, a cylindrical or truncated conical distributor, which is slidably attached to the gas burner tap body, is rotated to change the cross-sectional area of the flow path to adjust the gas flow rate. Therefore, the tap body and the distributor must be machined with high precision to improve airtightness. It is also necessary to apply grease or the like as a sealing material to the gap between the two.
Maintenance work such as replenishing grease is also complicated.

Furthermore, the main body and the distributor are made of metal products, and when the metal products are heated by the burner, they thermally expand, and there is a problem in that smooth rotation of the distributor is inhibited.

By the way, in the above-mentioned gas burner tap, in order to adjust the combustion amount of the gas burner, the gas flow rate can be adjusted by rotating the knob or the like to change the cross-sectional area of the gas flow path. However, when minimizing the combustion amount of the gas burner, there is a problem in that if the knob is turned too much, the gas flow path is excessively blocked, the gas supply is cut off, and the burner is extinguished.

[Purpose of the invention]

Therefore, the present invention solves the problems of the conventional technology described above, prevents gas leakage through the gap between the main body and the distributor, and reduces the contact area between the main body and the distributor. The purpose is to make the rotation of the distributor smooth, to form a path for the minimum amount of gas within the main body, and to easily adjust the gas flow rate up to the minimum gas flow rate without causing leakage. That is.

[Summary of the invention]

The tap according to the invention consists of a body having legs provided with means for fastening to a gas manifold, in which a gas introduction passage is formed which intersects at right angles with the gas discharge passage; has a cylindrical rotary distributor, which is formed with a front chamber coinciding with the gas discharge passage and with side openings in the side walls of the front chamber.

Further, a plurality of communication holes intersectingly bored in the main body form a minimum amount inlet path separate from the main gas inlet path of the tap.

Further, a portion of the distributor is fitted into a band of elastic material, and the elastic band is fixed to the tap body so as to prevent rotation, thereby forming a gas inlet and a minimum amount passage. Inwardly directed semicircular ribs are provided on both side peripheral edges of the elastic band in a compressed state between the distributor and the tap body, and at least three ribs extend across both sides of the elastic band. The longitudinal ribs of the same shape are compressed and protrude inward to define the main gas introduction passage and the minimum entrance passage, and the gas main introduction passage and the minimum entrance passage can be divided into various closed positions and different positions within this range. An airtight state is maintained even in the gas flow position.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

In the embodiment shown in FIG. 4, the tap body 1 has a gas introduction passage 9 formed therein, which gas introduction passage intersects the through hole in the vicinity of its blind hole end 7. This through hole has various sections of different diameter, the smallest diameter section 2 of which forms the gas outlet for the burner and the medium diameter section 3 supporting the distributor 19, as can be seen in FIG. The largest diameter area 4 accommodates the elastic band 12 and is followed by a cap 24 on which the distributor 19 is also supported and which itself is connected to the casing 25. is held by. This casing is fixed to the main body 1 with screws. This passage in the casing 25 supports a control rod 28 which, when pressed against the action of a spring 26, causes the distributor 19 to rotate by means of a recess 21 receiving a pin 27. This rotational movement positions the distributor 19 correspondingly to its closed position or to various other burner gas consumption positions.

The elastic band 12 comprises two diametrically opposed projections 13 and 14 (FIGS. 6 and 7), one projection 13 being of the closed type and the other projection 14 being of the open type; Both of these projections fit completely into the gas introduction passage 9, but the open projection 1
4 is on the gas introduction side, and a closed projection 14 is arranged in the blind hole end 7, so that this elastic band 12 holds the distributor 19 compressed between the tap body 1 and the distributor 19. is not moved by the rotation of.

This elastic band 12 is provided with semicircular ribs 15 on the inner edges of its sides, which ribs act as O-rings in the compressed parts of the band to prevent gas leakage through the gaps, and at the same time The area bearing against the distributor 19 is reduced, thus reducing the driving force applied to the distributor.

In addition, the elastic band 12 likewise has semicircular but longitudinally arranged ribs 16 which seal the gas inlet 18 and the minimum passage 17 from each other in order to seal them. It is divided.

The distributor 19 has two chambers 20 and 23 (FIG. 11), the first chamber 20 receiving the rod 28, while the second chamber 23 is aligned with the gas discharge area 2. This room 2
3 has a side opening 22 which, when the distributor rotates (FIG. 14), is not aligned with the gas introduction hole or with the smallest passage 17 of the elastic band 12, so that the gas introduction passage 9 can be This prevents the passage of gas from reaching the inlet passages 17 and 18 mentioned above.
This opening 22 is connected to the inlet 18 which receives the entire gas flow.
The two ribs 16 delimiting the inlet 18 prevent gas flow from the other passage 17, since in that case maximum gas consumption is obtained. Furthermore, when the opening 22 of the distributor 19 is aligned with the minimum passage 17, a minimum gas consumption is obtained by the same sealing action as described above (FIG. 13).

Finally, when the distributor opening 22 is placed intermediate the inlet 18 and the minimum passage 17, depending on the degree of alignment with these inlets 18 or passages 17, the aforementioned maximum and minimum limits are An intermediate series of consumptions is obtained, for example when aligned closest to the inlet 18, a near maximum flow rate is obtained.

A minimum gas consumption through the minimum passage 17 is obtained as follows. A hole 5 is made with sections of different diameter decreasing in the direction of the interior of the tap body. This hole 5 is formed on one side of the leg of the tap body 1, on the side of the introduction passage 9, with a certain degree of inclination towards the gas discharge passage and the outside, so that this hole 5 overlaps with the internal passage 9. Together, they form a gas introduction path 10 between them.

This hole 5 terminates in another hole 6 which communicates at its inner end with the through hole 4 of the tap body 1 and is thus formed by the rotation of the opening 22 of the distributor 19. A minimal entry path 8 is arranged within the segment, thus obtaining the alignment described above. This hole 6 is closed at its open end by a ball 29 (FIG. 12), which is inserted under pressure to prevent gas from escaping.

A regulating valve 30, equipped with an O-ring 31 to prevent gas leakage through gaps in the threads, is screwed into the first hole 5, as shown in FIG. The frusto-conical head of this needle valve 30 is seated completely within the distal small diameter section of the bore 5 and no gas can pass therebetween. The tip of this needle valve is likewise provided with an axial bore 33 which communicates with a radial bore 32 which is always located in the region of the gas inlet 10 of the bore 5; The radial holes also have a larger diameter than the corresponding part of the needle valve 30, so that gas passes through these holes 32 and 33 even when the radial holes 32 do not face the entry path 10.

Therefore, gas flow only occurs through holes 32 and 33 when needle valve 30 is screwed to the right. However, if the needle valve is not screwed on, gas can also pass through the gap left between the needle valve 30 and its valve seat, thus a minimum amount depending on the type of gas used. can be adjusted.

Gas thus reaches passage 9 in the tap body from the manifold, then reaches inlet 18 and entry passage 10, then enters bore 6 in the amount allowed by needle valve 30, and then passes through minimum entry. channel 8 and then through the opening 22 of the distributor to dispense the desired amount of the body 1.
may or may not proceed to the discharge port 2. This is because the distributor opening 22 is connected to the gas inlet path 1 as described above.
It depends on whether it is aligned with either or both of 7 and 18.

〔Effect of the invention〕

As described above, according to the present invention, the ribs on both sides of the elastic band have the effect of an O-ring, so gas leakage can be prevented and the driving force acting on the distributor can be reduced. .

Furthermore, since the gas inlet and the minimum passage are sealed from each other by the longitudinal ribs, an airtight state is maintained even in various closed positions and different gas flow positions.

[Brief explanation of the drawing]

FIG. 1 is a rear elevational view of the tap body according to the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 4,
Figure 3 is a sectional view taken along the - line in Figure 4;
Figure 5 is a front elevation view of the tap body; Figure 6 is a front view of the elastic band; Figure 7 is the operating band. 8 is a sectional view taken along the - line in Fig. 4, Fig. 9 is a sectional view taken along the - line in Fig. 4, Fig. 10 is a front view of the distributor, and Fig. 11 is a sectional view taken along the - line in Fig. 4. Longitudinal cross-sectional view of the distributor,
Figure 12 shows a vertical section of the tap with all components attached.
13 is a sectional view taken along the line - in FIG. 12, showing the distributor in the minimum consumption position, FIG. 14 showing the distributor in the closed position, and FIG. 15. This is a diagram showing a state in which a needle valve is attached. 1... Tap body, 2, 3, 4... Through hole, 5,
6... Hole, 8... Minimum gas entry path, 9... Gas introduction path, 10... Main gas entry path, 12... Elastic band, 13, 14... Projection, 15, 16... Rib, 17 ...Gas passage, 19...Distributor, 20,
23... Chamber, 22... Opening, 30... Needle valve, 32... Radial hole, 33... Axial hole.

Claims (1)

[Claims] 1 consisting of a body having legs with means for fixing to a gas manifold, in which a gas introduction passage is formed perpendicularly intersecting the gas discharge passage, and said body has a cylindrical rotary distributor; The distributor has a front chamber formed therein that coincides with the gas exhaust hole, a side opening in the side wall of the front chamber, and a plurality of holes perforated in the main body so as to intersect with each other. In a gas burner tap in which a communication hole forms a minimum amount entrance path separate from the main gas introduction path of the tap, a portion of the distributor is fitted into a band of an elastic material, and this elastic band is attached to the tap body. A gas inlet and a minimum amount passage are formed, and inwardly directed semicircular ribs are compressed between the distributor and the tap body at the peripheral edges of both sides. At least three longitudinal ribs of the same shape extending across both sides of the elastic band protrude inward in a compressed state, thereby forming the main gas introduction path. 1. A tap for a gas burner, characterized in that a minimum entrance path is defined and an airtight state is maintained even at various closed positions and different gas flow positions within this area.