CN110500580B

CN110500580B - Gas burner

Info

Publication number: CN110500580B
Application number: CN201810476686.XA
Authority: CN
Inventors: 黄重景; 黄锦颖; 黄信铭; 黄信雄; 叶严仁; 林冠州
Original assignee: Grand Mate Co Ltd
Current assignee: Grand Mate Co Ltd
Priority date: 2018-05-17
Filing date: 2018-05-17
Publication date: 2021-08-27
Anticipated expiration: 2038-05-17
Also published as: CN110500580A

Abstract

A gas burner comprises a first pipe and a second pipe, wherein the first pipe is provided with a first pipe section and a second pipe section which are connected, the second pipe section is provided with a chamber and an air outlet which are positioned at one side of the chamber, and the channel sectional area of the chamber of the second pipe section is larger than the channel sectional area of one end of the first pipe section, which is connected with the second pipe section; the second pipe is provided with a gas inlet section, a throat section and an extension section, wherein one end of the gas inlet section is provided with a gas inlet for injecting gas, the throat section is positioned between the gas inlet section and the extension section, the extension section extends into the chamber of the second section of the first pipe in a protruding way, and the channel sectional area of the extension section is smaller than that of the chamber, so that the gas burner can be suitable for low-pressure gas, and the backfire is avoided.

Description

Gas burner

Technical Field

The invention relates to a gas burner, in particular to a gas burner suitable for low pressure.

Background

Fig. 1 shows a burner 1 of the prior art, which includes an air inlet 2 and an air outlet 3, wherein the air inlet 2 and the air outlet 3 are respectively located at two ends of the burner 1, the inner diameter of the burner 1 gradually decreases from the air inlet 2 to the air outlet 3, and then gradually expands, and a chamber 4 with a larger volume is formed before the inner diameter approaches the air outlet 3, wherein the air inlet 2 is used for injecting gas and air; the air outlet 3 is used for outputting mixed gas and air, and flame is formed after the gas is ignited.

Although the burner 1 of the prior art can burn gas to generate flame, the design of the burner 1 is suitable for gas appliances using medium-pressure or high-pressure gas (such as a flash oven), but not suitable for gas appliances using low-pressure gas, wherein the pressure of the gas is in the unit of water column pressure, and the gas pressure isThe force differentiation ranges are as follows: the pressure of the low-pressure gas is 230-330mmH₂O is between the two; the pressure of the medium and high pressure gas is 700mmH₂O or more.

The reason why the burner 1 of the prior art is not suitable for using low pressure gas is that when low pressure gas is used, the pressure of the low pressure gas is small, so that the flow rate of the gas entering the burner 1 is slower than that of the high pressure or medium pressure gas, and the burner 1 is gradually expanded from the gas inlet 2 to the gas outlet 3, and the flow rate is slower after passing through the chamber 4, in other words, when the gas consumption rate of the flame is higher than the gas supply rate, the flame originally outside the burner 1 will be blown into the burner 1 from the gas outlet 3, forming a backfire (back fire), which is unsafe.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a gas burner that can be applied to a gas appliance using low-pressure gas.

In order to achieve the above object, the present invention provides a gas burner comprising a first pipe and a second pipe, wherein the first pipe has a chamber and an air outlet located at one side of the chamber; the second pipe is connected with the first pipe and is provided with a gas inlet pipe section, a throat pipe section and an extension pipe section, wherein one end of the gas inlet pipe section is provided with a gas inlet, the gas inlet is used for injecting gas, the throat pipe section is positioned between the gas inlet pipe section and the extension pipe section, a necking part is arranged in a channel of the throat pipe section, the extension pipe section extends into the accommodating chamber of the first pipe in a protruding mode, and the channel sectional area of the extension pipe section is smaller than that of the accommodating chamber.

The first pipe is provided with a first pipe section and a second pipe section, wherein one end of the first pipe section is an open end, the other end of the first pipe section is communicated with the second pipe section, and the second pipe section is provided with the accommodating chamber and the air outlet.

Wherein, the second pipe is detachably arranged in the first pipe.

The throat pipe section of the second pipe is clamped on the inner wall of the first pipe section of the first pipe.

The throat pipe section of the second pipe is provided with a pair of wing parts, the wing parts are positioned on the outer side of the necking part, and the wing parts are clamped on the inner wall of the first pipe section of the first pipe.

Wherein the first pipe section of the first pipe comprises a first subsection and a second subsection which are connected, wherein the first subsection is provided with the open end, the second subsection is connected with the second pipe section, and a tapered channel is formed in the first subsection from the open end to the direction of the second subsection; the pipe wall of the gas inlet pipe section of the second pipe is provided with at least one through hole, and the through hole is communicated with the gradually reducing channel.

Wherein, the first pipe is formed by two sheets with a preset shape in an involution way.

Wherein, the gas burner comprises a nozzle which is used for connecting a gas source; the first pipe has an extending part located outside the open end, the extending part has a ring corresponding to the open end, and the nozzle is arranged on the ring.

Wherein the first tube has a slot between the ring and the open end.

The gas burner comprises a fire outlet net which is provided with a plurality of meshes, and the fire outlet net is arranged on the first pipe and is positioned at the gas outlet.

Wherein, should go out the fire net and outwards bulge towards the direction that deviates from this second pipe section.

Wherein the channel sectional area of the extension pipe section is smaller than that of the other end of the first pipe section.

The invention has the advantages that the extending pipe section extends to the chamber, when low-pressure gas is used, the gas flow speed of the extending pipe section of the second pipe extending to the chamber is not slow, and the condition of backfire is avoided after the gas is ignited. In addition, the larger channel loading area of the chamber can generate a larger area of flame outside the air outlet.

Drawings

FIG. 1 is a cross-sectional view of a prior art burner;

FIG. 2 is a perspective view of a gas burner in accordance with a first preferred embodiment of the present invention;

FIG. 3 is an exploded view of the gas burner of the first preferred embodiment described above;

FIG. 4 is a cross-sectional view of the gas burner of the first preferred embodiment;

FIG. 5 is a sectional view of the gas burner of the first preferred embodiment;

FIG. 6 is a schematic view illustrating the flow of gas in the gas burner;

FIG. 7 is a sectional view of a gas burner according to a second preferred embodiment of the present invention;

FIG. 8 is a perspective view of a gas burner in accordance with a third preferred embodiment of the present invention;

fig. 9 is a perspective view of a gas burner in accordance with a fourth preferred embodiment of the present invention.

[ notation ] to show

[ Prior Art ]

1 burner

2 gas inlet 3 gas outlet 4 chamber

[ present invention ]

100 gas burner

10 first pipe

101 sheet 102 sheet 12 first pipe segment

121 open end 122 first sub-section 122a tapered channel

123

second sub-segment

123a, 123b and

13 second tube section 132 housing 134 vent

14 extension 141 collar 142 slotted

20 second pipe

22 gas inlet pipe section 222 gas inlet 224 perforation

24 throat section 241 throat 242 wings

26 extension pipe section

30 spray nozzle

32 nut

40 fire net

42 mesh

200 gas burner

202 open end

300 gas burner

302 first pipe 302a first section 302b second section

400 gas burner

402 first tube 402a housing 402b outlet

404 second pipe 404a extension pipe section 404b throat section

A first axis

B second axis

Cross sectional area of C1 channel

Cross sectional area of C2 channel

Cross sectional area of C3 channel

Cross sectional area of C4 channel

Angle theta

Detailed Description

To illustrate the present invention more clearly, a number of preferred embodiments will now be described in detail with reference to the accompanying drawings. Referring to fig. 2, a gas burner 100 according to a first preferred embodiment of the present invention includes a first pipe 10, a second pipe 20, a nozzle 30 and a fire outlet net 40.

Referring to fig. 3 and 5, the first pipe 10 has a first pipe section 12 and a second pipe section 13, wherein one end of the first pipe section 12 has an open end 121, and the other end of the first pipe section 12 is communicated with the second pipe section 13; the second tube section 13 has a chamber 132 and an air outlet 134, wherein the chamber 132 is formed by flaring the first tube section 12 of the first tube 10 toward the second tube section 13, and the air outlet 134 is located on a side of the chamber 132 away from the first tube section 12.

The second tube 20 has a gas inlet section 22, a throat section 24 and an extension section 26, wherein the gas inlet section 22 is located in the first section 12 of the first tube 10, and an end of the gas inlet section 22 near the open end 121 has a gas inlet 222. The gas inlet 222 is used for injecting gas into the second pipe 20; the throat section 24 is located between the gas inlet section 22 and the extension section 26, and a throat portion 241 is provided in the channel of the throat section 24, wherein the throat portion 241 is used for increasing the flow rate of the gas flow in the channel; the extension tube section 26 protrudes into the chamber 132 of the second tube section 13 of the first tube 10. The cross-sectional area of the passageway of the extension tube segment 26 is less than the cross-sectional area of the passageway of the chamber 132.

In this embodiment, the channel cross-sectional area C1 of the accommodating chamber 132 is between 3 and 3.5 times of the channel cross-sectional area C2 of the extension pipe section 26; the channel cross-sectional area C2 of the extension pipe section 26 is between 4 and 4.5 times the channel cross-sectional area C3 of the choke 241, and the channel cross-sectional area C4 of the other end 123a of the first pipe section 12 is between 1.5 and 1.7 times the channel cross-sectional area C2 of the extension pipe section 26.

The nozzle 30 is coupled to the first pipe 10 and is used to connect a gas source so that gas can be injected into the second pipe 20 through the gas inlet 222. More specifically, the first pipe 10 is formed by two

plates

101 and 102 having a predetermined shape, and has an extending portion 14 located outside the open end 121, the extending portion 14 has a ring 141, wherein the ring 141 is disposed corresponding to the open end 121 and is used for fixing the nozzle 30. In this embodiment, the extension 14 further has a slot 142 between the open end 121 and the ring 141, and the nozzle 30 is combined with a nut 32, and the nut 32 is located in the slot 142.

The fire outlet net 40 has a plurality of meshes 42, and is disposed at the air outlet 134 of the first pipe 10 and protrudes outward in a direction away from the second pipe section 13, so that the spraying range of the mixed gas sprayed from the fire outlet net 40 is widened, and the meshes 42 of the fire outlet net 40 are used for averaging the sprayed gas flow, so that when the gas burner 100 is ignited, the flame can be averaged because of the averaged sprayed gas flow.

In the present embodiment, the first segment 12 of the first pipe 10 includes a first sub-segment 122 and a second sub-segment 123 connected to each other, and an end 123b of the first sub-segment 122, which is not connected to the second sub-segment 123, is the open end 121, and an end 123a of the second sub-segment 123, which is not connected to the first sub-segment 122, is communicated with the second segment 13. It should be noted that a tapered channel 122a is formed inside the first sub-section 122 from the open end 121 to the second sub-section 123; the second tube 20 has a pair of wings 242 on the throat section 24, which are located outside the necking portion 241, so that the tapered channel 122a and the wings 242 can effectively fasten the second tube 20 detachably disposed on the first tube 10 on the inner wall of the first tube section 12 of the first tube 10, and achieve the unexpected effect of saving fastening space (refer to fig. 4).

In addition, the second tube 20 is plugged into the first tube 10 from the air outlet 134 of the first tube 10, and two perforations 224 communicating with the tapered passage 122a of the first tube 10 are provided on the wall of the air inlet section 22 for introducing air into the second tube 20, the two perforations 224 being disposed oppositely. In other embodiments, the second pipe 20 may also be placed between the two

plates

101 and 102 before the two

plates

101 and 102 are aligned, and then the two

plates

101 and 102 are aligned, so that the second pipe 20 is combined in the first pipe 10, or the second pipe and the first pipe are directly connected, and the pipe wall of the air inlet pipe section may have no through hole 224 or more than three through holes 224 for air to flow in.

Referring to fig. 6, after the gas flow is ejected from the nozzle 30, the gas flow flows through the slot 142 and is injected into the second pipe 20 through the air inlet 222 of the second pipe 20, and meanwhile, the air is also introduced into the second pipe 20 from the slot 142 to form a mixed gas flow of gas and air; when the mixed air flow in the second tube 20 flows through the perforations, the air in the first tube 10 is introduced into the second tube 20 from the perforations 224. When the mixed gas flows through the throat section 24, the gas velocity is increased because of the reduced channel, and the mixed gas is output to the chamber 132 of the first pipe 10 from the extension section 26 and then is ejected out of the first pipe 10 from the gas outlet 134. It should be noted that the cross-sectional area C2 of the extension pipe section 26 is smaller than the cross-sectional area C1 of the chamber 132, so as to avoid the situation that the speed of the gas flow is slowed down due to the gradual expansion of the passage when the mixed gas flows from the first pipe section 12 to the second pipe section 13, and to effectively prevent the flame combustion speed from being higher than the speed of the gas flow in the passage to form backfire.

It should be noted that, in the gas burner 100 of the present invention, after the gas passes through the fire-exit net 40, the mixing ratio of the gas and the air outside the fire-exit net 40 can reach the ratio capable of generating the flame, that is, the flame will be formed outside the fire-exit net 40, and will not generate the flame inside the gas burner 100, thereby causing the risk of backfire. In addition, the larger passage loading area C1 of the chamber 132 generates a larger area of flame beyond the outlet 134.

Referring to fig. 7, a gas burner 200 according to a second preferred embodiment of the present invention is shown, wherein the gas burner 200 is different from the gas burner 100 according to the first preferred embodiment in that the gas burner 200 does not have the nozzle 30 and the extension portion 14 according to the first preferred embodiment, and the gas is directly injected from the open end 202.

Referring to fig. 8, a gas burner 300 according to a third preferred embodiment of the present invention is shown, wherein the gas burner 300 is different from the gas burner 100 according to the first preferred embodiment in that the gas burner 300 is bent, the first pipe 302 has a first section 302a and a second section 302B, the first section 302a and the second section 302B respectively extend along a first axis a and a second axis B, wherein the first axis a and the second axis B form an included angle θ, and the included angle θ in this embodiment is 85 to 105 degrees. The included angle theta can be changed along with the gas appliance needing to be matched, so that the effect of combining with various gas appliances is achieved. The gas inlet and throat sections (not shown) of the second tube are located in the first section 302a and the extension section of the second tube is located in the second section 302 b.

Referring to fig. 9, a gas burner 400 according to a fourth preferred embodiment of the present invention is shown, wherein the gas burner 400 is different from the gas burner 100 according to the first preferred embodiment in that the first pipe 402 only has a chamber 402a and an air outlet 402b, an extension pipe section 404a of the second pipe 404 extends into the chamber 402a, the first pipe 402 is combined with the second pipe 404, and in this embodiment, the first pipe 402 is combined with the extension pipe section 404a of the second pipe 404, or can be combined with the throat pipe section 404 b. By reducing the length of the first tube 402, the volume can be reduced.

As mentioned above, the structure of the gas burner of the present invention can avoid the backfire caused by the flame burning speed outside the fire net being higher than the gas supply speed due to insufficient flow speed in the gas burner pipe when using low pressure gas, therefore, the gas burner of the present invention can be applied to the gas burner using gas pressure of 230-330mmH₂In the low pressure gas appliance between O, the larger channel loading area of the chamber can generate larger area flame.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas burner, comprising:

the first pipe is provided with a containing chamber and an air outlet which is positioned at one side of the containing chamber;

a second pipe connected with the first pipe and having a gas inlet section, a throat section and an extension section, wherein one end of the gas inlet section has a gas inlet for injecting gas, the throat section is located between the gas inlet section and the extension section, and a throat part is provided in the channel of the throat section, the extension section protrudes into the chamber of the first pipe, and the channel cross-sectional area of the extension section is smaller than that of the chamber, wherein the first pipe has a first pipe section, the second pipe is detachably disposed in the first pipe, and the throat section of the second pipe is clamped on the inner wall of the first pipe section of the first pipe.

2. The gas burner of claim 1, wherein the first pipe has a second pipe section, wherein one end of the first pipe section is an open end, the other end of the first pipe section is communicated with the second pipe section, and the second pipe section has the chamber and the gas outlet.

3. The gas burner of claim 1, wherein the throat section of the second tube has a pair of wings located outside the throat portion, the pair of wings engaging an inner wall of the first tube section of the first tube.

4. The gas burner of claim 2, wherein the first segment of the first pipe comprises a first sub-segment and a second sub-segment connected together, wherein the first sub-segment has the open end, the second sub-segment is connected to the second segment, and a tapered channel is formed inside the first sub-segment from the open end to the second sub-segment; the pipe wall of the gas inlet pipe section of the second pipe is provided with at least one through hole, and the through hole is communicated with the gradually reducing channel.

5. The gas burner of claim 2, wherein the first pipe is formed by joining two sheets having a predetermined shape.

6. The gas burner of claim 5, comprising a nozzle for connection to a gas source; the first pipe has an extending part located outside the open end, the extending part has a ring corresponding to the open end, and the nozzle is arranged on the ring.

7. The gas burner of claim 6, wherein the first tube has a slot between the annular ring and the open end.

8. The gas burner of claim 1, comprising a fire outlet net having a plurality of mesh openings, the fire outlet net being disposed in the first pipe and at the gas outlet.

9. The gas burner of claim 8, wherein the fire net is convex in a direction away from the second tube section.

10. The gas burner of claim 2, wherein the extension pipe section has a passage sectional area smaller than that of the other end of the first pipe section.