Furnace end capable of improving flaming stability

Abstract

The utility model discloses a furnace end capable of improving flaming stability. The furnace end comprises a shell with an inner cavity and N plasma combustion assemblies arranged in the shell. According to the plasma combustion assembly, the speed reduction blocks distributed in the gas inlet pipe in a staggered mode are used for reducing the speed of gas flow, so that the retention time of gas in the plasma combustion assembly is prolonged, and the ionization efficiency and the plasma generation quality are improved; the first flow blocking ring in the fire spraying pipe and the second flow blocking ring at the upper end of the electrode needle can block direct impact of airflow, so that the airflow flows upwards in a more stable state, concentration increase of plasma near the electrode needle is facilitated, and plasma jet flow can be stably sprayed out; according to the utility model, the conductive tube and the air inlet tube are integrated stainless steel fittings, so that the integrated stainless steel fittings are manufactured through a die, and only a relatively simple and standardized process of die forming needs to be completed, so that batch production can be realized, and the production period can be greatly shortened.

Description

Technical Field

[0001] The utility model relates to an electric flame stove. Background Art

[0002] The electric flame stove, also known as the plasma stove, is a new type of flame generation method. It uses a high-frequency changing electric field. An arc phenomenon occurs between two electrodes under a certain voltage. The arc is a beam of high-temperature ionized gas. The electric flame stove uses a continuous arc as the energy for heating the pot body.

[0003] For example, patent application number 202322561701X discloses a burner head for an electric flame stove, comprising an air supply device with a cover and an air supply chamber. In this patent, an arc is generated between the ion needle and the conductive flame nozzle. Air flow is then introduced through an inlet with an inclined design on the side wall of the air vortexer, mixing with the plasma to form a rotating working medium jet that protects the arc generation and heats the pot. However, in actual experiments, the rotating working medium jet was squeezed by the air flow continuously introduced by the air inlet, forcing it to move upward passively, resulting in a poor flow rate.

[0004] To address the above issues, patent application number 202311369153.9 discloses a furnace head with a rotating working medium jet, comprising: a cathode plate, multiple hollow cathode flame tubes mounted on the cathode plate, multiple insulating seats, and multiple anode needles mounted on the insulating seats. The insulating seats are provided with multiple inclined air inlet holes at the bottom, which are used to generate a rotating air flow within the arc generation space. This patent utilizes multiple inclined air inlet holes at the bottom of the insulating seat. Airflow introduced into the arc generation space, confined by the inner walls of the cathode flame tubes, forms a rotating plasma flow that protects the arc generation. Because the air inlet holes communicate with the top of the cathode flame tubes, the plasma flow forms a more effective jet for heating the pot bottom. However, this prior art still presents problems: air enters the flame tubes at a high velocity and is rapidly ejected from the flame tube nozzles. The air's residence time within the flame tubes is extremely short, resulting in insufficient gas ionization, which significantly affects the quality of plasma generation and prevents the plasma jet from reaching the desired high temperature.

[0005] Furthermore, the existing technology for opening air inlet holes on ceramic tubes is a complex process that requires specialized equipment and technicians to operate, such as laser drilling and mechanical drilling. The equipment also needs to be precisely debugged and maintained to ensure the dimensional accuracy and positional accuracy of the air inlet holes, which increases costs. At the same time, the scrap rate of ceramic tubes is high, and defects such as cracks and broken edges are prone to occur during the hole digging process. In addition, the aperture of the air inlet holes is prone to being smaller or the hole depth is larger, or the air inlet holes are easily clogged. These problems can lead to an increase in the scrap rate. Utility Model Content

[0006] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0007] A burner head for improving flame spraying stability comprises: a shell having an internal cavity and N plasma combustion assemblies disposed within the shell; the shell comprises an upper shell and a lower shell, each of the upper shell and the lower shell being provided with N upper mounting holes and lower mounting holes corresponding to the plasma combustion assemblies; the plasma combustion assembly comprises a flame spraying tube, a conductive tube, a ceramic tube, and an electrode needle, the flame spraying tube, the conductive tube, and the ceramic tube being abutted in sequence, and the lower end of the electrode needle being mounted within the ceramic tube; an air intake pipe is provided on the wall of the conductive tube, and a plurality of semicircular speed reduction blocks are disposed within the air intake pipe, with adjacent speed reduction blocks being staggered, and an axis of the air intake pipe forming a 90° angle with an axis of the conductive tube;

[0008] Preferably, a first annular baffle ring is provided at the bottom of the inner wall of the flame-spraying tube, and a second annular baffle ring is provided at the upper end of the electrode needle;

[0009] Preferably, a mounting platform is provided on the outer side of the bottom of the flame-spraying tube, the mounting platform abuts against the upper shell along the edge of the upper mounting hole, and the bottom surface of the mounting platform abuts against the top surface of the conductive tube;

[0010] Preferably, a mounting ring is provided on the outer side of the top surface of the ceramic tube, the lower side of the mounting ring abuts against the lower shell along the edge of the lower mounting hole, and the ceramic tube extends downward through the lower mounting hole;

[0011] Preferably, the nozzle of the flame-spraying tube is contracted;

[0012] Preferably, an air intake fan is provided on the housing;

[0013] Preferably, the flame-spraying tube, the conductive tube and the shell are all made of conductive materials and are connected to a ground wire.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The utility model decelerates the airflow by means of deceleration blocks staggeredly distributed in the air inlet pipe, and the blocking of the electrode needles weakens the kinetic energy of the airflow, thereby prolonging the residence time of the gas in the plasma combustion component, thereby increasing the time for the gas to be ionized, and improving the ionization efficiency and the quality of plasma generation.

[0016] The first baffle ring in the flamethrower tube of the utility model and the second baffle ring on the upper end of the electrode needle can block the direct impact of the airflow, reduce the turbulence of the airflow and the generation of eddies, so that the airflow flows upward in a more stable state, which is beneficial to increase the concentration of plasma near the electrode needle, and the plasma jet can be stably ejected.

[0017] The conductive tube and the air intake pipe of the present invention are integral stainless steel accessories. Therefore, the integral stainless steel accessories are manufactured through a mold. Only a relatively simple and standardized process of mold forming needs to be completed, which can realize mass production and greatly shorten the production cycle.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a three-dimensional diagram of the present utility model.

[0021] Figure 2 It is a structural stereogram of the plasma burner of the utility model.

[0022] Figure 3 It is a structural cross-sectional view of the plasma burner of the utility model.

[0023] Figure 4 It is an exploded view of the housing of the utility model. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0026] Furthermore, in the description of this utility model, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components; wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described later can be combined with each other as long as they do not conflict with each other.

[0028] See also Figure 1 and Figure 4 In an embodiment of the present invention, a burner head for improving flame spraying stability includes: a shell 1 with an internal cavity and N plasma combustion assemblies 2 disposed inside the shell 1; the shell 1 includes an upper shell 110 and a lower shell 120, and the upper shell 110 and the lower shell 120 are respectively provided with N upper mounting holes 111 and lower mounting holes 121 corresponding to the plasma combustion assemblies 2;

[0029] See Figure 2 and Figure 3 The plasma combustion assembly 2 includes a flame-spraying tube 210, a conductive tube 220, a ceramic tube 230 and an electrode needle 240. The flame-spraying tube 210, the conductive tube 220 and the ceramic tube 230 are sequentially abutted, and the lower end of the electrode needle 240 is installed in the ceramic tube 230.

[0030] An air inlet pipe 221 is provided on the wall of the conductive pipe 220 . A plurality of semicircular speed reduction blocks 222 are provided in the air inlet pipe 221 . Adjacent speed reduction blocks 222 are staggered so that the airflow is continuously blocked and slowed down when passing through the air inlet pipe 221 .

[0031] The axis of the air inlet pipe 221 and the axis of the conductive tube 220 form an angle of 90°, causing the incoming gas to collide with the electrode needle 240. This collision will hinder the forward direction of the gas, and part of the kinetic energy will be converted into internal energy and other forms of energy, thereby further reducing the outflow speed of the gas; therefore, the slowdown in the gas flow rate means that the residence time of the gas in the plasma combustion assembly 2 is extended, thereby increasing the time for the gas to be ionized, improving the ionization efficiency and the quality of plasma generation.

[0032] In the embodiment of the present invention, a first annular baffle ring 211 is provided at the bottom of the inner wall of the flamethrower 210, and a second annular baffle ring 241 is provided at the upper end of the electrode needle 240; the double baffle rings can block the direct impact of the airflow, reduce the turbulence of the airflow and the generation of eddies, so that the airflow flows upward in a more stable state, which is conducive to increasing the concentration of plasma near the electrode needle 240, and the plasma jet can be stably ejected.

[0033] In the embodiment of the present utility model, a mounting platform 212 is provided on the outer side of the bottom of the flamethrower tube 210, and the mounting platform 212 abuts the upper shell 110 along the edge of the upper mounting hole 111, and the bottom surface of the mounting platform 212 abuts the top surface of the conductive tube 220; a mounting ring 231 is provided on the outer side of the top surface of the ceramic tube 230, and the bottom of the mounting ring 231 abuts the lower shell 120 along the edge of the lower mounting hole 121, and the ceramic tube 230 extends downward through the lower mounting hole 121.

[0034] In the embodiment of the present invention, the nozzle of the flame tube 210 is converging. According to the Bernoulli principle in fluid mechanics, when gas flows through the converging nozzle, the gas flow rate will increase significantly. As the plasma density within the plasma combustion assembly 2 continues to increase and heat causes the plasma pressure to continue to expand, the energy and momentum contained within it will increase. Therefore, in the embodiment of the present invention, when a plasma jet is formed and ejected from the nozzle of the flame tube 210, the jet intensity will increase, and at the same time, the temperature of the plasma itself in the embodiment of the present invention will be maintained at a relatively high temperature value.

[0035] In this embodiment of the utility model, an air intake fan 3 is provided on the housing 1; the air intake fan 3 can draw fresh air from the outside into the housing 1, thereby replenishing the air entering the plasma combustion assembly 2. The entry of fresh air helps provide a more sufficient material basis for the generation of plasma, ensuring the continuous and stable generation of plasma and improving the quality and efficiency of the plasma jet.

[0036] In this embodiment of the present invention, the flamethrower tube 210, the conductive tube 220, and the housing 1 are all made of conductive materials and are connected to a ground wire, forming a complete current loop. This allows the current to flow smoothly when the electrode needles 240 discharge to generate plasma, helping to maintain the continuous generation of plasma and preventing problems such as a poor current loop from affecting the normal generation and operation of the plasma. Furthermore, the housing 1, as a conductor and grounded, can, to a certain extent, shield the electric field from interference with external circuits.

[0037] In the embodiment of the present invention, the conductive tube 220 and the air intake pipe 221 are integral stainless steel accessories. Therefore, by adopting the method of manufacturing the integral stainless steel accessories through a mold, it is only necessary to complete the relatively simple and standardized process of mold forming, which can realize mass production and greatly shorten the production cycle.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A burner head for improving flame spraying stability, comprising: A shell with an internal cavity and N plasma combustion components arranged inside the shell; characterized in that: The housing includes an upper housing and a lower housing, and the upper housing and the lower housing are respectively provided with N upper mounting holes and lower mounting holes corresponding to the plasma combustion assembly; The plasma combustion assembly includes a flame-spraying tube, a conductive tube, a ceramic tube and an electrode needle. The flame-spraying tube, the conductive tube and the ceramic tube are sequentially abutted against each other, and the lower end of the electrode needle is installed in the ceramic tube. An air intake pipe is provided on the wall of the conductive tube. A plurality of semicircular speed reduction blocks are provided in the air intake pipe, and adjacent speed reduction blocks are staggered. An angle of 90° is formed between the axis of the air intake pipe and the axis of the conductive tube.

2. The burner head for improving flame spraying stability according to claim 1, characterized in that: A first annular baffle ring is provided at the bottom of the inner wall of the flame-spraying tube, and a second annular baffle ring is provided at the upper end of the electrode needle.

3. The burner head for improving flame spraying stability according to claim 2, characterized in that: A mounting platform is provided on the outer side of the bottom of the flame-spraying tube. The mounting platform abuts against the upper shell along the edge of the upper mounting hole, and the bottom surface of the mounting platform abuts against the top surface of the conductive tube.

4. The burner head for improving flame spraying stability according to claim 3, characterized in that: A mounting ring is provided on the outer side of the top surface of the ceramic tube. The lower side of the mounting ring abuts against the lower shell along the edge of the lower mounting hole. The ceramic tube extends downward through the lower mounting hole.

5. The burner head for improving flame spraying stability according to claim 4, characterized in that: The nozzle of the flame-spraying tube is in a contraction shape.

6. The burner head for improving flame spraying stability according to claim 5, characterized in that: An air suction fan is provided on the shell.

7. The burner head for improving flame spraying stability according to claim 6, characterized in that: The flame-spraying tube, the conductive tube and the shell are all made of conductive materials and are connected to the ground wire.

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