Flame guide protective sleeve

Abstract

The present invention discloses a flame guide protective sleeve, which is composed of three tubular structures, namely, a near flame section, a middle flame section and a far flame section. There is a smooth transition between the near flame section and the far flame section, and the transition zone is the middle flame section. The cross section of the near flame section is a rectangular structure, and the cross section of the far flame section is a rectangle or an ellipse. The near flame section, the middle flame section and the far flame section are made of the same material, and preferably a quartz glass tube or a transparent alumina tube. The protective sleeve is close to the burner head, and the high-temperature and high-speed gas flame generated by the burner head is blown into the protective sleeve from the near flame section. The far flame section is embedded in a metal cotton guide tube, which is supported and fixed by the cotton guide tube, and the position of the protective sleeve in the cotton guide tube is adjustable. The present invention has a simple structure, low manufacturing cost, and can be widely used. It solves the problems of serious flame heat loss, large capital waste, and insufficient flame safety in the prior art, and achieves energy saving, protection, and cleaning effects.

Description

Technical Field

[0001] The invention patent relates to the technical field of thermal insulation devices, and specifically to a flame guide protection sleeve. Technical Background

[0002] In 2020, my country proposed the goal of reaching carbon peak by 2030 and achieving carbon neutrality by 2060. To achieve this goal, energy conservation using thermal insulation materials is the key. Ultrafine glass fiber wool has the characteristics of high temperature resistance, acid and alkali corrosion resistance, and excellent thermal insulation and sound insulation properties. It is widely used in aerospace, construction, transportation, thermal pipelines and other fields. It is an indispensable thermal insulation material in modern industry. Flame blowing is the main method for preparing ultrafine glass fiber wool. The fiber diameter can be as low as 1 to 6 μm. Compared with centrifugal glass fiber wool, the glass fiber wool prepared by flame blowing has a smaller diameter, which significantly improves the sound insulation and thermal insulation properties of glass wool.

[0003] The flame-blowing method is used to prepare ultra-fine glass fiber wool. After the glass balls are heated electrically in the kiln to a molten state, bubbles and impurities are removed, and then they flow out through a metal leak plate to form primary fibers with a diameter of 25 to 38 mm. The primary fiber filaments are stretched by a rubber roller, and after exiting the rubber roller, they are melted, separated, refined, pulled, and condensed by a high-temperature, high-speed gas flow at 1100 to 1200°C and 280 to 320 m / s to form secondary fibers with a diameter of microns or submicrons. The secondary fibers are collected by a cotton collector equipped with negative pressure wind through a cotton guide tube, sprayed with adhesive, and then cured and dried at a high temperature to form continuous glass wool felt. In the flame-blowing method, high-temperature and high-speed flames play an important role.

[0004] At present, when preparing fibers by flame blowing, the flame is often exposed to the atmosphere, which leads to the following problems: ① Pollutants in the surrounding environment easily contaminate the flame and affect the airflow; ② The heat loss of high-temperature and high-speed gas flow is serious. When high-temperature and high-speed flame blowing is performed, more natural gas needs to be burned to raise the temperature of the molten glass liquid to the drawing temperature, which leads to serious energy waste and a significant increase in the cost of glass wool preparation; ③ The safety of workers caused by the exposed flame. In view of the above problems, it has become a top priority to invent a method that can effectively improve the thermal energy utilization efficiency of glass wool prepared by flame blowing, reduce natural gas energy loss, reduce production costs, and improve the purity of glass wool and safety hazards. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a flame guide and protection sleeve having the functions of flame guide, flame heat preservation, flame cleaning and flame protection.

[0006] 1. To solve the above technical problems, the technical solution of the present invention is: the flame guide protection sleeve is composed of three tubular structures of a near flame section, a middle flame section and a far flame section, with a smooth transition between the near flame section and the far flame section, and the transition zone is the middle flame section, wherein the cross-section of the near flame section is a rectangular structure, and the ratio of the cross-section length to the width is 2 to 10; the cross-section of the far flame section is a rectangle or an ellipse, the ratio of the rectangular length to the width is 2 to 10, and the ratio of the major axis diameter to the minor axis diameter of the ellipse cross-section is 1 to 10.

[0007] Preferably, the near flame section, the middle flame section and the far flame section are made of the same material, preferably a quartz glass tube or a transparent alumina tube, with a wall thickness of 0.5 to 5 mm.

[0008] Preferably, the center points of the near flame section, the middle flame section and the far flame section are on a straight line.

[0009] Preferably, the remote flame section is embedded in a metal cotton guide tube, supported and fixed by the cotton guide tube, and the position of the protective sleeve in the cotton guide tube is adjustable.

[0010] The flame guide protective sleeve of the present invention is realized by blowing a high-temperature and high-speed flame into the protective sleeve from the near-flame section, so that the flame is gathered on the surface of the primary fiber, thereby improving the heating temperature and heating efficiency, avoiding the loss of flame heat, and the flame temperature effectively reaches the temperature required for the glass liquid fine stream drawing, thereby reducing production energy consumption, shortening processing time, improving production efficiency, and reducing production costs; preventing the flame from bringing in impurities in the air and contaminating the glass wool, thereby improving the purity of the glass wool; protecting the high-temperature and high-speed gas flame and improving the flame safety.

[0011] The invention has the advantages that the flame guide protection sleeve has a simple structure, low manufacturing cost and is easy to use; the protection sleeve limits the flame inside, thereby improving flame safety, improving production efficiency and reducing production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the structure of Example 1 of the present invention.

[0013] Figure 2 It is a left view of the structure of Example 1 of the present invention.

[0014] Figure 3 This is a top view of the structure of Example 1 of the present invention.

[0015] Figure 4 It is a three-dimensional schematic diagram of the structure of Example 2 of the present invention.

[0016] Figure 5 It is a left view of the structure of Example 2 of the present invention.

[0017] Figure 6 This is a top view of the structure of Example 2 of the present invention.

[0018] In the figure: 1-near flame section; 2-middle flame section; 3-far flame section. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be understood that these embodiments are only used to illustrate the present invention but not to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art are all within the scope of the claims attached to this application.

[0020] Example 1

[0021] like Figures 1 to 3 As shown, a flame guide flame protection sleeve is composed of three tubular structures, namely, a near flame section, a middle flame section and a far flame section. There is a smooth transition between the near flame section and the far flame section, and the transition zone is the middle flame section, wherein the cross sections of the near flame section and the far flame section are both rectangular structures. The length of the rectangular cross section of the near flame section is 45 cm and the width is 15 cm, and the length-to-width ratio is 3. The length of the rectangular cross section of the far flame section is 60 cm and the width is 20 cm, and the length-to-width ratio is 3. The materials of the near flame section, the middle flame section and the far flame section are quartz glass with a wall thickness of 0.8 mm. The center points of the near flame section, the middle flame section and the far flame section are on a straight line. The near flame section is close to the rubber roller, and the high-temperature and high-speed gas flame generated by the burner head is blown from the near flame section into the protective sleeve. The far flame section is embedded in the metal cotton guide tube, supported and fixed by the cotton guide tube, and the position of the protective sleeve in the cotton guide tube is adjustable.

[0022] For a flame-blown glass wool kiln with an annual capacity of 3,000 tons, without this protective cover, when the glass liquid temperature of the kiln leaks to 1200℃~1250℃, a 45~55m 3 / h of natural gas flow rate can keep the high-temperature and high-speed gas flame at 1100℃~1200℃ to melt, split and draw the glass liquid to form micron or submicron glass fibers; using this protective cover, only 20~30m 3 / h flow rate of natural gas can keep the high-temperature and high-speed gas flame at 1100℃ ~ 1200℃, which shows that the energy-saving and heat-insulating effects are remarkable.

[0023] Example 2

[0024] like Figures 4 to 6As shown, a flame guide flame protection sleeve is composed of three tubular structures, namely, a near flame section, a middle flame section and a far flame section. There is a smooth transition between the near flame section and the far flame section, and the transition zone is the middle flame section. The cross section of the near flame section is a rectangular structure, with a length of 45 cm and a width of 15 cm, and a length-to-width ratio of 3. The cross section of the far flame section is an elliptical structure, with a major axis diameter of 90 cm and a minor axis diameter of 30 cm, and a major axis diameter-to-minor axis diameter ratio of 3. The near flame section, the middle flame section and the far flame section are made of transparent alumina with a wall thickness of 1 mm. The center points of the near flame section, the middle flame section and the far flame section are in a straight line. The near flame section is close to the rubber roller, and the high-temperature and high-speed gas flame generated by the burner head is blown into the protective sleeve from the near flame section. The far flame section is embedded in a metal cotton guide tube, supported and fixed by the cotton guide tube, and the position of the protective sleeve in the cotton guide tube is adjustable.

[0025] For a flame-blown glass wool furnace with an annual capacity of 5,000 tons, without this protective cover, when the glass liquid temperature of the furnace leak plate is 1200℃~1250℃, 55~65m 3 / h flow of natural gas can keep the high-temperature and high-speed gas flame at 1100℃~1200℃ to melt, split and draw the glass liquid to form micron or submicron glass fibers; using this protective cover, only 30~40m 3 / h flow rate of natural gas can keep the high-temperature and high-speed gas flame at 1100℃ ~ 1200℃, which shows that the energy-saving and heat-insulating effects are remarkable.

[0026] The above are only two specific implementations of the present invention, but the design concept of the present invention is not limited to them. Any non-substantial changes to the present invention using this concept shall be deemed as an act of infringing the protection scope of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments in any form according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A flame guide protective sleeve, characterized in that It consists of three tubular structures: a near flame section, a middle flame section and a far flame section. There is a smooth transition between the near flame section and the far flame section. The transition zone is the middle flame section. The cross section of the near flame section is a rectangular structure with a length-to-width ratio of 2 to 10. The cross section of the far flame section is a rectangle or an ellipse with a length-to-width ratio of 2 to 10 and a major-axis diameter-to-minor-axis diameter ratio of 1 to 10. The near flame section, the middle flame section and the far flame section are made of the same material, and are made of quartz glass tube or transparent alumina tube with a wall thickness of 0.5-5mm.

2. The flame guide protection sleeve according to claim 1, characterized in that The center points of the near flame section, the middle flame section and the far flame section are on a straight line.

3. The flame guide protection sleeve according to claim 1, characterized in that The remote flame section is embedded in the metal cotton guide cylinder and is supported and fixed by the cotton guide cylinder. The position of the protective sleeve in the cotton guide cylinder is adjustable.

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