Off-flame prevention mushroom fire cap of gas stove

Abstract

The utility model belongs to the technical field of gas stoves, and relates to an anti-flame mushroom fire cap of a gas stove, which is mounted above a burner, corresponds to a gas nozzle on the burner, and sequentially comprises an inner air mixing pipe, a base in threaded connection with the air mixing pipe and an inner air fire cap main body erected on the base from bottom to top, main fire holes and branch fire holes are formed in the upper side wall of the fire cap body, the main fire holes and the branch fire holes are different in hole diameter, air inlet holes are formed in the outer side of the gas mixing pipe, and the lower end of the gas mixing pipe is in threaded connection with the nozzle. According to the anti-off-flame mushroom fire cap of the gas stove, the cost is saved, the use is convenient, the power of the fire cap is large, the used materials are few, and the combustion is stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas stoves and relates to a flame-leaving-proof mushroom-type burner cap of a gas stove. Background Art

[0002] There is a widely used flame cap in the gas stove market, which is called mushroom head in the industry. However, as the national requirements for the implementation of gas stove standards are becoming more and more stringent, the technical indicators of traditional mushroom head flame caps must meet national standards, and the power must be very small to achieve carbon monoxide within the standard, which is no longer suitable for market needs. Therefore, it is gradually withdrawing from the market.

[0003] Commercial mushroom-shaped caps in the prior art are mainly used as the main fire of fierce fire stoves. The main feature is that a circle of equal-sized circular holes pointing obliquely upwards are evenly arranged around the center of the top of the cap. The lower end of the inner cavity of the cap is provided with an inner thread, which is directly screwed with the ejector tube. The outer diameter of the ejector tube is the outer diameter of the inner cavity of the cap. Therefore, the ejector tube is thicker and uses more materials. Similar mushroom-shaped caps for household use are mainly used for cooking fires. It is characterized by designing two circles of equal-sized circular holes pointing obliquely upwards evenly arranged at the upper part, and the lower end of the cap cavity is directly connected to the throat of the stove head. In summary, the common disadvantages of these two caps are: 1. Because the diameter of the fire holes is the same, the range of changes in the gas pressure is very small, and it is easy to fly away from the flame and the combustion is unstable. 2. In order to adapt to the changes in the gas source pressure and prevent the flame from leaving, it is necessary to install a damper, which increases the product cost, and it is very troublesome to adjust the damper during use. 3. The diameter of the cap with the same power is large, and the diameter of the ejector tube is thick, so the material cost is high. For this reason, a new mushroom-shaped cap is proposed to solve the above-mentioned problems. Summary of the invention

[0004] The utility model aims to solve the problems that the current gas pressure variation range is very small, flame separation and flying fire are easy, and the combustion is unstable. The utility model proposes a flame separation prevention mushroom fire cap for a gas stove, which has stable combustion, adapts to a wide range of gas pressure variations, ensures normal combustion of the fire cap, saves costs, and is easy to use.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A flame-off-proof mushroom cap for a gas stove is installed above a burner head and corresponds to the gas nozzles on the burner head. From bottom to top, it includes an inner hollow gas mixing pipe, a base threadedly connected to the gas mixing pipe, and an inner hollow cap body mounted on the base. The upper side wall of the cap body is provided with a main fire hole and a fire splitting hole. The main fire hole has a different aperture from the fire splitting hole. An air inlet hole is provided on the outer side of the gas mixing pipe. The lower end of the gas mixing pipe is threadedly connected to the nozzle. The gas mixing pipe and the nozzle, and the gas mixing pipe and the base are all threadedly connected, which is detachable, easy to maintain, cost-saving, and easy to use. The cap has high power, uses less materials, and has stable combustion.

[0007] The inner space of the gas mixing tube and the detonator body forms a micro gas mixing chamber for mixing gas and air under negative pressure.

[0008] The aperture of the main fire hole is larger than the aperture of the branch fire hole.

[0009] The main fire hole and the fire distribution hole are arranged in a ring shape on the upper side wall of the fire cap body.

[0010] The percussion cap body is provided with a step and is placed on the base through the step.

[0011] An internal thread is provided at the center of the base, an external thread is provided on the outer side of the upper end of the mixing pipe, and the base and the mixing pipe are threadedly connected through the internal thread and the external thread.

[0012] The utility model has the following advantages and beneficial effects:

[0013] The present invention has more stable combustion than the prior art and can adapt to a wider range of gas pressure changes. The present invention is divided into outer ring fire (main fire hole) and inner ring fire (dividing fire hole). The sizes of the inner and outer ring dividing fire holes are different, so the fire resistance is different. The small hole has a large resistance and can adapt to greater pressure changes than the large hole. Therefore, when the outer ring leaves the flame, the inner ring does not leave the flame. The flame of the inner ring pulls the flame of the outer ring, ensuring the normal combustion of the fire cap.

[0014] Compared with the existing technology, it saves the air door adjustment, saves costs and is easy to use;

[0015] The power is greater than that of the existing fire cap. The existing technology controls the size of the air suction hole to control the balance between the gas outlet speed and the combustion speed of the fire outlet to prevent flame separation. However, the present application does not prevent flame separation by reducing the supply of gas and air, but by using the flame-proof ring (formed by multiple fire-dividing holes) on the upper end of the fire cap to hold the main fire that is about to separate from the flame. Therefore, the flow rate of the main fire-dividing hole does not need to be considered under standard pressure, so a larger nozzle can be selected. Therefore, the power is greater than that of the existing fire cap. The power of the fire cap with the same diameter can be increased by more than 40%;

[0016] Less material is used than the prior art. The outer diameter of the prior art mixing tube is the inner diameter of the flash cap. In order to take into account the ignition area of ​​the fire distribution hole to achieve a certain power, the mixing tube is very thick, which wastes materials and increases costs. However, the present invention has a micro-mixing chamber design and has air inlet holes at the base and the center. The general mixing tube on the market can be selected, and the procurement cost is low. The flash cap of the same power uses less material than the flash cap of the prior art. Therefore, the material cost is saved by more than 40% compared with the flash cap of the same power. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of a flame-proof mushroom cap for a gas stove of the utility model;

[0019] Figure 2 The utility model is a structural schematic diagram of a flame-leaving-proof mushroom burner of a gas stove.

[0020] In the figure, 1-primer body; 2-main fire hole; 3-base; 4-internal thread; 5-external thread; 6-micro gas mixing chamber; 7-gas mixing pipe; 8-air inlet hole; 9-third thread; 10-fire distribution hole. DETAILED DESCRIPTION

[0021] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] like Figures 1-2 As shown, a flame-proof mushroom cap for a gas stove is installed above the burner head and corresponds to the gas nozzle on the burner head respectively. From bottom to top, it includes an inner hollow gas mixing pipe 7, a base 3 threadedly connected to the gas mixing pipe 7, and an inner hollow gas cap body 1 mounted on the base 3. The gas cap body 1 is in the shape of a cylinder with an arched top. The upper side wall of the gas cap body 1 is provided with a main fire hole 2 and a fire-dividing hole 10. The aperture of the main fire hole 2 is different from that of the fire-dividing hole 10. An air inlet hole 8 is provided on the outer side of the gas mixing pipe 7. The lower end of the gas mixing pipe 7 is threadedly connected to the nozzle. The lower end of the gas mixing pipe 7 is provided with a third thread 9 threadedly connected to the nozzle. The gas mixing pipe 7 and the furnace body, the gas mixing pipe 7 and the base 3 are all threadedly connected, which is detachable, easy to maintain, cost-saving, and easy to use. The gas cap has high power, uses less materials, and has stable combustion.

[0023] The inner space of the gas mixing tube 7 and the detonator body 1 forms a micro gas mixing chamber 6 for mixing gas and air under negative pressure.

[0024] The aperture of the main fire hole 2 is larger than that of the fire dividing hole 10. The main fire hole 2 is arranged on the outer edge, and the fire dividing hole 10 is arranged on the inner edge, and the positions of the two holes can be switched. The anti-flame separation fire dividing hole 10 and the main fire hole 2 are arranged in a ring shape on the top of the fire cap body 1. The inner and outer ring fire dividing holes 10 are of different sizes, so the fire resistance is different. The small hole has a large resistance and can adapt to pressure changes more than the large hole. Therefore, when the outer ring separates from the flame, the inner ring does not separate from the flame. The flame of the inner ring pulls the flame of the outer ring, ensuring the normal combustion of the fire cap.

[0025] The main fire hole 2 and the fire distribution hole 10 are arranged in an annular shape on the upper side wall of the fire cap body 1. The fire cap body 1 is provided with a step, and is placed on the base 3 through the step. The base 3 is provided with an internal thread 4 at the center, and the outer side of the upper end of the mixing pipe 7 is provided with an external thread 5. The base 3 and the mixing pipe 7 are threadedly connected through the internal thread 4 and the external thread 5.

[0026] Working principle:

[0027] The gas is sprayed upward through the nozzle, and the gas flowing at a high speed in the mixing pipe 7 is sucked into the air from the suction hole through the suction effect, and is mixed, and rapidly diffuses in the micro-mixing chamber 6, and is sprayed obliquely upward through the main fire hole 2. At this time, it is ignited, and the air flow velocity of the fire separation hole 10 is greater than the combustion velocity, reaching the flame separation state, but the anti-flame separation hole is small and the resistance is large, and the flow velocity is approximately equal to the combustion velocity. The gas burns on the combustion hole, and the combustion is stable. At the same time, the flame of the anti-flame separation fire separation hole 10 is ignited and pulls the flame of the main fire hole 2 that is about to separate from the flame, and the combustion is stable.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A flame-proof mushroom cap for a gas stove, which is installed above a burner head and corresponds to the gas nozzles on the burner head, and is characterized by: From bottom to top, it includes an inner hollow gas mixing pipe, a base threadedly connected to the gas mixing pipe, and an inner hollow detonator body mounted on the base. A main fire hole and a fire-dividing hole are provided on the upper side wall of the detonator body. The main fire hole and the fire-dividing hole have different apertures. An air inlet hole is provided on the outer side of the gas mixing pipe. The lower end of the gas mixing pipe is threadedly connected to the nozzle.

2. The flame-proof mushroom cap for a gas stove according to claim 1, characterized in that: The inner space of the gas mixing tube and the detonator body forms a micro gas mixing chamber for mixing gas and air under negative pressure.

3. The flame-proof mushroom cap for a gas stove according to claim 2, characterized in that: The aperture of the main fire hole is larger than the aperture of the branch fire hole.

4. The flame-proof mushroom cap for a gas stove according to claim 3, characterized in that: The main fire hole and the fire distribution hole are arranged in a ring shape on the upper side wall of the fire cap body.

5. The flame-proof mushroom cap for a gas stove according to claim 1, characterized in that: The percussion cap body is provided with a step and is placed on the base through the step.

6. The flame-proof mushroom cap for a gas stove according to claim 1, characterized in that: An internal thread is provided at the center of the base, an external thread is provided on the outer side of the upper end of the mixing pipe, and the base and the mixing pipe are threadedly connected through the internal thread and the external thread.

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