A high energy efficient heating sleeve and flare gun

Abstract

The application discloses a high-energy-efficiency heating sleeve, which comprises an outer sleeve and at least one inner sleeve, the inner sleeve is located inside the outer sleeve, the inner sleeve and the outer sleeve are arranged axially in parallel, and the inner wall and the outer wall of the inner sleeve and the inner wall of the outer sleeve are all provided with infrared reflection coating. Under the action of the infrared reflection coating, the flame is reflected multiple times in the inner sleeve and between the inner sleeve and the outer sleeve, so that the heat of the flame can be collected in the middle, that is, the diameter of the ejected flame is reduced, meanwhile, the flame passing through the high-energy-efficiency heating sleeve changes from blue to red, so that the flame has better penetration, and has higher efficiency when heating or burning. The high-energy-efficiency heating sleeve is used in the aluminum processing industry, and has the effects of saving energy and having higher heating efficiency.

Description

Technical Field

[0001] This invention relates to burners, and more particularly to a high-efficiency heating sleeve and a flame gun. Background Technology

[0002] The processing of aluminum profiles involves melting and casting to obtain aluminum rods, which are then extruded into shape using a hot die. Because aluminum rods have a high heat transfer rate, their temperature will drop while waiting to enter the die, especially at the ends where the heat dissipation area is larger, causing the temperature to drop even faster. Therefore, it is necessary to reheat the ends of the aluminum rods before they enter the die.

[0003] In existing technologies, the method for reheating the end of an aluminum rod involves using a blowtorch aimed at the end to heat it with the flame. The flame emitted by the blowtorch is typically a blue flame, or only a red flame at the edge; this type of flame has a low temperature and weak penetration. Furthermore, because it is point-to-point heating, the blowtorch is usually close to the aluminum rod, while the emitted flame area is relatively large, typically conical, meaning the flame cannot fully act on the aluminum rod, resulting in significant waste of heat energy. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency heating sleeve and a flame gun to solve the above-mentioned problems.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A high-efficiency heating sleeve includes an outer cylinder and at least one inner cylinder, wherein the inner cylinder is located inside the outer cylinder and the inner cylinder and the outer cylinder are arranged axially parallel.

[0007] The inner and outer walls of the inner cylinder, as well as the inner wall of the outer cylinder, are all provided with an infrared reflective coating.

[0008] Furthermore, the number of inner cylinders is one.

[0009] Furthermore, the gap between the outer wall of the inner cylinder and the inner wall of the outer cylinder is 25-30mm.

[0010] Furthermore, the outer cylinder has a diameter of 140-150mm, and the inner cylinder has a diameter of 80-90mm.

[0011] Furthermore, the inner cylinder is shorter than the outer cylinder, and the inner cylinder is completely located inside the outer cylinder.

[0012] Furthermore, the outer cylinder has a length of 460-480mm, and the inner cylinder has a length of 360-380mm.

[0013] Furthermore, the upper side of the front end of the outer cylinder extends forward to form a flame shield.

[0014] Furthermore, the high-efficiency heating sleeve also includes a support, which includes a collar and a connecting rod;

[0015] The collar is fitted over the inner cylinder and is attached to the outer wall of the inner cylinder. One end of the connecting rod is connected to the collar, and the other end is connected to the outer cylinder.

[0016] Furthermore, the thickness of the infrared reflective coating is 0.5-2 mm; the infrared reflective coating is formed by applying an infrared reflective paint, the formulation of which is: 80 wt% silicon carbide and 20 wt% sodium silicate.

[0017] A flamethrower includes a nozzle and a high-efficiency heating sleeve; the outer sleeve is fitted around the nozzle, and the inner sleeve is located directly in front of the nozzle. Thus, the flame ejected from the nozzle passes through the high-efficiency heating sleeve before exiting, achieving a better flame enhancement effect and improving flame penetration.

[0018] The beneficial effects of this invention are as follows:

[0019] Thanks to the infrared reflective coating, the flame undergoes multiple reflections within the inner cylinder and between the inner and outer cylinders, allowing the heat to concentrate in the center, thus reducing the diameter of the emitted flame. Simultaneously, the flame changes from blue to red after passing through the high-efficiency heating sleeve, resulting in better flame penetration and higher efficiency during heating or burning. This high-efficiency heating sleeve is used in the aluminum processing industry to achieve energy savings and higher heating efficiency. Attached Figure Description

[0020] The accompanying drawings further illustrate the present invention, but the content of the drawings does not constitute any limitation on the present invention.

[0021] Figure 1 This is an axial schematic diagram of a high-efficiency heating sleeve according to one embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Another perspective schematic diagram of the high-efficiency heating sleeve shown;

[0023] Figure 3 yes Figure 1 Another perspective schematic diagram of the high-efficiency heating sleeve shown;

[0024] Figure 4 yes Figure 1 The diagram shows the combination of a high-efficiency heating sleeve and a flamethrower.

[0025] In the attached diagram: 1-outer cylinder, 11-flame shield, 2-inner cylinder, 3-infrared reflective coating, 4-support, 41-ring, 42-connecting rod, 5-flame gun, 51-flame nozzle. Detailed Implementation

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-4 As shown, a high-efficiency heating sleeve of this embodiment includes an outer cylinder 1 and at least one inner cylinder 2. The inner cylinder 2 is located inside the outer cylinder 1, and the inner cylinder 2 and the outer cylinder 1 are arranged axially parallel.

[0028] The inner and outer walls of the inner cylinder 2, as well as the inner wall of the outer cylinder 1, are all provided with an infrared reflective coating 3.

[0029] This high-efficiency heating sleeve is used in the flame gun 5 and is installed at the front end of the flame gun 5 so that the flame emitted by the flame gun 5 passes through the high-efficiency heating sleeve before being emitted. When the flame passes through the high-efficiency heating sleeve, it passes through both the outer cylinder 1 and the inner cylinder 2 simultaneously. Under the action of the infrared reflective coating, the flame undergoes multiple reflections in the inner cylinder 2 and between the inner cylinder 2 and the outer cylinder 1, allowing the heat of the flame to concentrate in the center, thus reducing the diameter of the emitted flame. At the same time, the flame changes from blue to red after passing through the high-efficiency heating sleeve, resulting in better flame penetration and higher efficiency during heating or burning. The reason why the flame changes from blue to red is that the wavelength of the thermal radiation wave becomes longer after multiple reflections. The longer the wavelength, the smaller the amplitude, and the stronger the penetration, thereby improving the heating efficiency of the flame.

[0030] Specifically, this high-efficiency heating sleeve is used in the aluminum processing industry. The high-efficiency sleeve is installed at the nozzle of the flame gun 5 to heat the end face of the aluminum rod. The flame has a larger contact area with the aluminum rod, saving energy, and the flame has strong penetration and higher heating efficiency.

[0031] The more inner cylinders 2 there are in the high-efficiency heating sleeve, the more times the flame is reflected. However, too many inner cylinders 2 will obstruct the nozzle of the flame gun 5, affecting the amount of gas supplied and thus the intensity of the flame. The number of inner cylinders 2 is 1-2, preferably 1.

[0032] Furthermore, the gap between the outer wall of the inner cylinder 2 and the inner wall of the outer cylinder 1 is 25-30mm. Setting this gap size allows for more uniform flame distribution, and also enables the infrared reflective coating 3 to achieve a better reflection effect.

[0033] Furthermore, the outer cylinder 1 has a diameter of 140-150mm, and the inner cylinder 2 has a diameter of 80-90mm.

[0034] The outer cylinder 1 of this size can accommodate a variety of flame gun models 5 and provides space for flame reflection, thus achieving a better flame enhancement effect. The inner cylinder 2, with a diameter of 80-90 mm, matches the outer cylinder 1, ensuring good enhancement of both the inner and outer flame layers of the heating sleeve. Preferably, the outer cylinder 1 has a diameter of 150 mm, and the inner cylinder 2 has a diameter of 88 mm.

[0035] To facilitate better installation of the heating sleeve and achieve a better flame convergence effect, the inner cylinder 2 is shorter than the outer cylinder 1, and the inner cylinder 2 is completely located inside the outer cylinder 1. During installation, the rear end of the outer cylinder 1 is fitted onto the flame gun 5. The shorter inner cylinder 2 allows space for the installation of the outer cylinder 1, while the front end of the inner cylinder 2 is also located inside the outer cylinder 1, allowing the flames passing through the outer cylinder 1 and the inner cylinder 2 to converge together.

[0036] Furthermore, the outer cylinder 1 has a length of 460-480mm, and the inner cylinder 2 has a length of 360-380mm.

[0037] The lengths of the outer cylinder 1 and inner cylinder 2, combined with the diameters of the inner and outer cylinders 1, limit the number of flame reflections within the heating sleeve. If the sleeve length is too short, the number of flame reflections will be low, resulting in insufficient flame enhancement. If the sleeve length is too long, the number of flame reflections will be excessive, affecting flame intensity and also impacting the flame's projection distance. Preferably, the outer cylinder 1 has a length of 430 mm, and the inner cylinder 2 has a length of 330 mm.

[0038] To further orient the direction of the flame ejection, the upper side of the front end of the outer cylinder 1 extends forward to form a flame shield 11.

[0039] The flame shield 11 is located at the top of the heating sleeve and has a limiting effect on the direction of flame jet. When this high-efficiency heating sleeve is used for heating the end of an aluminum rod, it can make the flame more concentrated and accurately aligned with the aluminum rod, thereby improving the heat utilization rate. The length of the flame shield 11 along the axial direction of the outer cylinder 1 is 100-120mm, preferably 110mm.

[0040] To achieve the positioning of the outer cylinder 1 and the inner cylinder 2, the high-efficiency heating sleeve also includes a bracket 4, which includes a collar 41 and a connecting rod 42. The collar 41 is fitted around the inner cylinder 2 and is in contact with the outer wall of the inner cylinder 2. One end of the connecting rod 42 is connected to the collar 41, and the other end is connected to the outer cylinder 1. Specifically, two brackets 4 are respectively located at the front and rear ends of the inner cylinder.

[0041] The relative positions of the outer cylinder 1 and the inner cylinder 2 are fixed by the bracket 4, which has a simple structure and is easy to install. Specifically, the connecting rod 42 is perpendicular to the outer wall of the collar 41, which can minimize the interference of the connecting rod 42 with the flame.

[0042] Furthermore, the thickness of the infrared reflective coating 3 is 0.5-2 mm; the infrared reflective coating is formed by applying an infrared reflective coating material, the formulation of which is: 80 wt% silicon carbide and 20 wt% sodium silicate.

[0043] The coating thickness is sufficient to reflect flames effectively. If the coating is too thin, it is easily penetrated by heat radiation, resulting in poor reflection; if the coating is too thick, it increases equipment costs. An infrared reflective coating composed of 80wt% silicon carbide and 20wt% sodium silicate exhibits good temperature resistance.

[0044] Accordingly, this embodiment of the invention also provides a flame gun 5, including a flame nozzle 51 and a high-efficiency heating sleeve according to any one of claims 1-9; an outer cylinder 1 is fitted onto the flame nozzle 51, and an inner cylinder 2 is located directly in front of the flame nozzle 51. Thus, the flame ejected from the flame nozzle 51 passes through the high-efficiency heating sleeve before being ejected, achieving a better flame enhancement effect and improving the flame's penetration.

[0045] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A high-efficiency heating sleeve, characterized in that, It includes an outer cylinder and an inner cylinder, the inner cylinder being located inside the outer cylinder, and the inner cylinder and the outer cylinder being arranged axially parallel; The inner and outer walls of the inner cylinder, as well as the inner wall of the outer cylinder, are all provided with an infrared reflective coating. It also includes a bracket, which comprises a collar and a connecting rod; The collar is fitted over the inner cylinder and is attached to the outer wall of the inner cylinder. One end of the connecting rod is connected to the collar, and the other end is connected to the outer cylinder.

2. The high-efficiency heating sleeve according to claim 1, characterized in that, The gap between the outer wall of the inner cylinder and the inner wall of the outer cylinder is 25-30mm.

3. The high-efficiency heating sleeve according to claim 2, characterized in that, The outer cylinder has a diameter of 140-150mm, and the inner cylinder has a diameter of 80-90mm.

4. The high-efficiency heating sleeve according to claim 3, characterized in that, The inner cylinder is shorter than the outer cylinder, and the inner cylinder is completely located inside the outer cylinder.

5. The high-efficiency heating sleeve according to claim 3, characterized in that, The outer cylinder has a length of 460-480mm, and the inner cylinder has a length of 360-380mm.

6. The high-efficiency heating sleeve according to claim 1, characterized in that, The upper side of the front end of the outer cylinder extends forward to form a flame shield.

7. The high-efficiency heating sleeve according to claim 1, characterized in that, The thickness of the infrared reflective coating is 0.5-2 mm; the infrared reflective coating is formed by applying an infrared reflective paint, and the formulation of the infrared reflective paint is: 80 wt% silicon carbide and 20 wt% sodium silicate.

8. A flamethrower, characterized in that, It includes a flame nozzle and a high-efficiency heating sleeve as described in any one of claims 1-7; the outer sleeve is fitted around the flame nozzle, and the inner sleeve is located directly in front of the flame nozzle; thereby, the flame ejected from the flame nozzle passes through the high-efficiency heating sleeve and is ejected, achieving a flame enhancement effect and improving the flame penetration.

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