Flame nozzle and method for manufacturing the same

Abstract

The present invention discloses a flame nozzle and a manufacturing method thereof, comprising a first guide block and a second guide block, wherein the outer side of the first guide block is provided with two or more uniformly distributed first guide channels; the second guide block is sleeved inside the first guide block, and two or more uniformly distributed second guide channels and a third guide channel are sequentially provided from the outside to the inside; the first guide channel and the second guide channel are both cylindrically spirally distributed, with opposite or same spiral directions and equal pitches. The flame nozzle of the present invention adopts a plurality of cylindrically spirally distributed guide channels to form a tornado-shaped spiral flame surrounding the surface of the heated body, increasing the contact area between the flame and the heated body, making the flame burn more fully, improving the combustion efficiency and saving energy; the flame nozzle manufacturing method of the present invention can quickly manufacture guide channels with different spiral angles according to heating needs, and has the advantages of simple process and low cost compared with the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of fuel appliances, and in particular to a flame nozzle and a manufacturing method thereof. Background Art

[0002] Metal preheating is often required in metal processing and cutting. At present, the heat generated by the combustion of combustible gas energy such as coal gas and natural gas is usually used for preheating. Existing flame nozzles are generally designed with a single hole or a simple multi-hole array flame spraying method, which has the problem of incomplete gas combustion, resulting in low combustion efficiency, energy waste and long preheating time.

[0003] At present, flame nozzles with multiple channels are generally processed by CNC milling, casting or coil processing of a whole piece of metal. However, CNC, casting or coil processing have the problems of complex process, long processing time and high cost. In addition, flame nozzles of different specifications need to be reprogrammed or molded, which is time-consuming and labor-intensive. Especially when it is necessary to process a spiral guide channel according to the flame shape, manufacturing is more difficult.

[0004] Therefore, there is an urgent need to develop a flame nozzle and a manufacturing method thereof to improve combustion efficiency, save energy, reduce the difficulty of the manufacturing process, and reduce manufacturing costs. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention aims to provide a flame nozzle and a method for manufacturing the same, which can improve combustion efficiency, save energy, and have the characteristics of simple processing and low cost.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A flame nozzle, comprising a first guide block and a second guide block, characterized in that:

[0008] The first guide block is a hollow cylinder, and two or more evenly distributed first guide channels are arranged on the outer side of the first guide block; the first guide channel spirally rises from bottom to top with the axis of the first guide block as the center, and penetrates the upper and lower end surfaces and the outer cylindrical surface of the first guide block;

[0009] The second guide block is a cylinder and is sleeved inside the first guide block; the second guide block is provided with two or more evenly distributed second guide channels and a third guide channel from the outside to the inside, and the second guide channel spirally rises from bottom to top with the axis of the second guide block as the center and passes through the upper and lower end surfaces of the second guide block; the third guide channel coincides with the axis of the second guide block and passes through the upper and lower end surfaces of the second guide block.

[0010] Preferably, the first guide block and the second guide block are coaxially fixed to each other.

[0011] Preferably, the first guide block and the second guide block are bonded together using inorganic high-temperature adhesive.

[0012] Preferably, the cross-section of the first flow guiding channel is rectangular, and the cross-section of the second flow guiding channel is circular or elliptical.

[0013] Preferably, the first guide channel and the second guide channel are both cylindrically spirally distributed.

[0014] Preferably, the first guide channel and the second guide channel have opposite or same spiral directions and the same spiral pitches.

[0015] Preferably, the helix angles of the first flow guiding channel and the second flow guiding channel are greater than 20 degrees.

[0016] Preferably, the material of the first guide block and the second guide block is SUS316 or SUS316L stainless steel.

[0017] The invention also discloses a method for manufacturing a flame nozzle, comprising the following steps:

[0018] (1) processing a stainless steel sheet into a first guide plate using a punching machine or a cutting device, wherein the first guide plate is provided with a first air hole and an inner clamping hole on the outer side and the inner side respectively;

[0019] (ii) taking a plurality of first guide plates obtained in step (i), coaxially stacking them with the inner clamping hole as a reference, using a positioning fixture to rotate all adjacent first guide plates in the same direction and at the same angle with the first air hole as a reference point, so that the first air hole forms a spiral first guide channel;

[0020] (iii) compacting the first guide plates obtained in step (ii), and then sequentially welding and polishing all adjacent first guide plates on the outside using welding equipment to obtain first guide blocks for standby use;

[0021] (iv) processing the stainless steel sheet into a second guide plate using a punching machine or a cutting device, wherein the second guide plate is provided with a second air hole and a third air hole from the outside to the inside respectively;

[0022] (V) taking a plurality of second guide plates obtained in step (IV), coaxially stacking them with the third air hole as the reference, using a positioning fixture to rotate all adjacent second guide plates in the same direction by the same angle with the second air hole as the reference point, so that the second air holes form a spiral second guide channel, and the third air holes form a cylindrical third guide channel;

[0023] (vi) compacting the second guide plates obtained in step (v), and then sequentially welding and polishing all adjacent second guide plates on the outside using welding equipment to obtain second guide blocks for standby use;

[0024] (VII) Applying inorganic high temperature glue on the inner hole of the first guide block obtained in step (III), and then inserting the second guide block obtained in step (VI) into the inner hole, and obtaining a flame nozzle after the inorganic high temperature glue is cured.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The flame nozzle is equipped with multiple gas guide channels, which can make the flame burn more fully, improve combustion efficiency and save energy compared with a single gas guide channel;

[0027] 2. By respectively applying high-pressure combustible gas and high-pressure combustion-supporting gas in different guide channels of the flame nozzle, the high-pressure combustible gas and the high-pressure combustion-supporting gas are fully mixed and then sprayed at a high speed to obtain a higher temperature.

[0028] 3. The flame nozzle adopts the first guide channel and the second guide channel of the coaxial cylindrical spiral distribution, forming a tornado-shaped spiral flame surrounding the surface of the heated object, increasing the contact surface between the flame and the heated object, thereby obtaining a better heating effect.

[0029] 4. The flame nozzle manufacturing method of the present invention can quickly manufacture guide channels with different spiral angles according to the shape of the flame, the area of ​​the heated body and the temperature requirements, and has the advantages of simple process and low cost compared with the existing technology.

[0030] 5. The flame nozzle manufacturing method of the present invention can meet the manufacturing needs of flame nozzles of different diameters and heights by using one raw material. Compared with the prior art, it has the advantages of good versatility and reduced raw material inventory pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the flame nozzle of the present invention;

[0032] Figure 2 It is a schematic structural diagram of the first guide plate of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the first guide block of the present invention;

[0034] Figure 4 is a schematic structural diagram of a second guide plate of the present invention;

[0035] Figure 5 It is a partial cutaway schematic diagram of the second guide block of the present invention;

[0036] Figure 6 It is a schematic diagram of flame heating of the present invention.

[0037] Among them: the first guide block 10; the first guide plate 11; the first guide channel 12; the first air hole 12a; the inner clamping hole 13; the second guide block 20; the second guide plate 21; the second guide channel 22; the second air hole 22a; the third guide channel 23; the third air hole 23a; the heated body 30; the spiral flame 40; the non-spiral flame 50. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] Below, the present invention is further described in conjunction with the accompanying drawings and specific embodiments:

[0042] like Figure 1 As shown, a flame nozzle comprises a first guide block 10 and a second guide block 20;

[0043] The first guide block 10 is a hollow cylinder, and ten evenly distributed first guide channels 12 are arranged on the outside of the first guide block 10; the first guide channels 12 spirally ascend from bottom to top with the axis of the first guide block 10 as the center, and penetrate the upper and lower end surfaces and the outer cylindrical surface of the first guide block 10;

[0044] The second guide block 20 is a cylinder and is sleeved inside the first guide block 10; the second guide block 20 is provided with ten evenly distributed second guide channels 22 and one third guide channel 23 from the outside to the inside, and the second guide channel 22 spirally rises from bottom to top with the axis of the second guide block 20 as the center and passes through the upper and lower end surfaces of the second guide block 20; the third guide channel 23 coincides with the axis of the second guide block 20 and passes through the upper and lower end surfaces of the second guide block 20.

[0045] Furthermore, the first guide block 10 and the second guide block 20 are coaxially fixed to each other.

[0046] Furthermore, an inorganic high-temperature adhesive is used to bond the inner cylindrical surface of the first guide block 10 and the outer cylindrical surface of the second guide block 20; the inorganic high-temperature adhesive can withstand a maximum temperature of 1800 degrees Celsius, and while bonding and fixing, it can also prevent gas leakage from the joint.

[0047] Furthermore, the cross section of the first flow guiding channel 12 is rectangular, and the cross section of the second flow guiding channel 22 is circular or elliptical.

[0048] Furthermore, the first flow guiding channel 12 and the second flow guiding channel 22 are both cylindrically spirally distributed. Figure 6 As shown, a guide channel with a cylindrical spiral distribution is used to form a tornado-shaped spiral flame 40, which surrounds the surface of the heated body 30 and increases the contact area between the flame and the heated body; while the non-spiral flame 50 formed by the straight guide channel generates turbulence when approaching the surface of the heated body 30, causing the flame to disperse quickly; it can be seen that the use of a cylindrical spiral distribution of the guide channel can achieve a better heating effect.

[0049] Furthermore, the spiral directions of the first guide channel 12 and the second guide channel 22 are opposite or the same, and the pitches are equal. When the spiral directions are opposite, a wider flame can be obtained, and when the spiral directions are the same, a more concentrated spiral flame can be obtained.

[0050] Furthermore, the material of the first guide block 10 and the second guide block 20 is SUS316 or SUS316L stainless steel.

[0051] In the first usage example, the flame nozzle is inserted into the outlet of the combustible gas pipeline, and the combustible gas is ejected in a spiral shape through the first guide channel 12 and the second guide channel 22 and then ignited, so that the flame is in a tornado spiral shape, increasing the contact area between the flame and the heated object, and accelerating the contact with oxygen in the air, so that the combustible gas is fully burned, and the combustion efficiency and heating efficiency are improved; the third guide channel 23 makes the ejected flame more uniform.

[0052] The smaller the spiral angles of the first guide channel 12 and the second guide channel 22 are, the stronger the spiral of the ejected flame is. Therefore, in the use case where a larger heating area is required, a larger heating area can be obtained by a smaller spiral angle.

[0053] In the second usage example, the combustible gas is connected to the first guide channel 12 and the third guide channel 23 respectively, and the second guide channel 22 is connected to the combustion-supporting gas. The combustible gas and the combustion-supporting gas are sprayed out in a spiral shape so that they are fully mixed and then burned, which can greatly improve the combustion efficiency and obtain a higher flame temperature.

[0054] The larger the spiral angle of the first guide channel 12 and the second guide channel 22, the higher the speed of the ejected flame. Therefore, in the use case where a smaller area needs to be heated at a high temperature, the spiral angle can be increased, and high-pressure combustible gas and high-pressure combustion-supporting gas can be applied separately in different guide channels, so that the high-pressure combustible gas and high-pressure combustion-supporting gas are fully mixed and then ejected at a high speed to obtain a higher temperature.

[0055] In the flame nozzle disclosed in the above embodiment, in the existing processing technology, the first guide channel 12 usually needs to be milled and drilled using a multi-axis CNC machine tool, which has the disadvantages of expensive processing costs and long processing time; the second guide channel 22 usually needs to be cast using a sand core or lost foam casting, which has the disadvantages of complex manufacturing process, long time, and the inability to quickly and cost-effectively adjust the helix angle of the guide channel as needed.

[0056] In addition, in order to obtain a similar effect to the flame nozzle disclosed in the above embodiment, a steel pipe spiral winding method can also be used for processing, but it also has the disadvantages of complex process, high cost and difficulty in adjusting the spiral angle.

[0057] In order to overcome the shortcomings of the prior art, the present invention also discloses a method for manufacturing a flame nozzle, comprising the following steps (the total height of the nozzle in this embodiment is 80 mm, and a SUS316 stainless steel sheet with a thickness of 0.2 mm is used as the raw material for processing):

[0058] (a) If Figure 2 As shown, the stainless steel sheet is processed into a first guide plate 11 using a punching machine or a cutting device.

[0059] The first air hole 12a and the inner clamping hole 13 are respectively provided on the outer side and the inner side of the first guide plate 11;

[0060] (ii) Figure 3As shown, 400 first guide plates 11 obtained in step (i) are coaxially stacked with the inner clamping hole 13 as the reference, and a positioning fixture is used to rotate all adjacent first guide plates 11 in the same direction by 0.1 degrees to the right with the first air hole 12a as the reference point, so that the first air hole 12a forms a spiral first guide channel 12;

[0061] (iii) After the first guide plates 11 obtained in step (ii) are compressed, all adjacent first guide plates 11 are welded and polished on the outside in sequence using welding equipment to obtain first guide blocks 10 for standby use;

[0062] (IV) Figure 4 As shown, the stainless steel sheet is processed into a second guide plate 21 using a punching machine or a cutting device.

[0063] The second guide plate 21 is provided with a second air hole 22a and a third air hole 23a from the outside to the inside respectively;

[0064] (V) Figure 5 As shown, 400 second guide plates 21 prepared in step (iv) are coaxially stacked with the third air hole 23a as the reference, and a positioning fixture is used to rotate all adjacent second guide plates 21 in the same direction to the left by 0.1 degree with the second air hole 22a as the reference point, so that the second air hole 22a forms a spiral second guide channel 22, and the third air hole 23a forms a cylindrical third guide channel 23;

[0065] (vi) After the second guide plates 21 obtained in step (v) are pressed, all adjacent second guide plates 21 are welded and polished on the outside in sequence using welding equipment to obtain second guide blocks 20 for standby use;

[0066] (VII) Apply inorganic high temperature glue on the inner hole 13 of the first guide block 10 obtained in step (III), and then insert the second guide block 20 obtained in step (VI) into the inner hole 13. After the inorganic high temperature glue is cured, a flame nozzle is obtained.

[0067] The manufacturing method of the flame nozzle in this embodiment can use thinner stainless steel sheets for processing in order to make the first guide channel 12 and the second guide channel 22 have a smaller spiral angle and a smooth inner wall, while reducing the rotation angle between adjacent guide plates of the first guide plate 11 and the second guide plate 21.

[0068] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the patent claims of the present invention.

Claims

1. A flame nozzle, comprising a first guide block and a second guide block, characterized in that: The first guide block is a hollow cylinder, and two or more evenly distributed first guide channels are arranged on the outer side of the first guide block; the first guide channel spirally rises from bottom to top with the axis of the first guide block as the center, and penetrates the upper and lower end surfaces and the outer cylindrical surface of the first guide block; The second guide block is a cylinder, which is sleeved inside the first guide block; the second guide block is sequentially provided with two or more evenly distributed second guide channels and a third guide channel from the outside to the inside, and the second guide channel spirally rises from bottom to top with the axis of the second guide block as the center and penetrates the upper and lower end surfaces of the second guide block; The third guide channel coincides with the axis of the second guide block and passes through the upper and lower end surfaces of the second guide block.

2. The flame nozzle according to claim 1, characterized in that: The first guide block and the second guide block are coaxially fixed to each other.

3. The flame nozzle according to claim 1, characterized in that: The first guide block and the second guide block are bonded together using inorganic high-temperature adhesive.

4. The flame nozzle according to claim 1, characterized in that: The cross section of the first flow guiding channel is rectangular, and the cross section of the second flow guiding channel is circular or elliptical.

5. The flame nozzle according to claim 1, characterized in that: The first flow guiding channel and the second flow guiding channel are both cylindrically spirally distributed.

6. The flame nozzle according to claim 1, characterized in that: The spiral directions of the first guide channel and the second guide channel are opposite or the same, and the pitches are equal.

7. The flame nozzle according to claim 1, characterized in that: The helix angles of the first flow guiding channel and the second flow guiding channel are greater than 20 degrees.

8. The flame nozzle according to claim 1, characterized in that: The first guide block and the second guide block are made of SUS316 or SUS316L stainless steel.

9. The method for manufacturing a flame nozzle according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) Processing a stainless steel sheet into a first guide plate using a punching machine or a cutting device, wherein the first guide plate is provided with a first air hole and an inner clamping hole on the outer side and the inner side respectively; (ii) taking a plurality of first guide plates obtained in step (i), coaxially stacking them with the inner clamping hole as the reference, using a positioning fixture to rotate all adjacent first guide plates in the same direction and at the same angle with the first air hole as the reference point, so that the first air hole forms a spiral first guide channel; (iii) Compacting the first guide plates obtained in step (ii), and then sequentially welding and polishing all adjacent first guide plates on the outside using welding equipment to obtain first guide blocks for standby use; (iv) processing the stainless steel sheet into a second guide plate using a punching machine or a cutting device, wherein the second guide plate is provided with a second air hole and a third air hole from the outside to the inside respectively; (V) Take a plurality of second guide plates obtained in step (IV), coaxially stack them with the third air hole as the reference, use a positioning fixture to rotate all adjacent second guide plates in the same direction by the same angle with the second air hole as the reference point, so that the second air hole forms a spiral second guide channel, and the third air hole forms a cylindrical third guide channel; (vi) Compact the second guide plates obtained in step (v), and then weld and polish all adjacent second guide plates on the outside in sequence using welding equipment to obtain second guide blocks for standby use; (VII) Apply inorganic high temperature glue on the inner hole of the first guide block obtained in step (III), and then insert the second guide block obtained in step (VI) into the inner hole. After the inorganic high temperature glue is cured, a flame nozzle is obtained.

10. A burning appliance, characterized in that: A flame nozzle comprising the flame nozzle as claimed in any one of claims 1 to 8.

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