Protective structure for a heating arc torch in a high-temperature furnace

Abstract

The application discloses a heating arc torch protection structure in a high-temperature furnace, which comprises a sleeve, an upper sleeve cover and a lower sleeve cover, the sleeve is composed of a plurality of sheaths connected in sequence, the middle part of the upper sleeve cover is provided with an upper through hole, the lower end of the sleeve is arranged on the lower sleeve cover, the lower end of an arc torch pipe is fixedly connected with a connecting section, a nozzle is threadedly connected or clamped with the connecting section, the middle part of the lower sleeve cover is provided with a lower through hole, the inner side of the lower sleeve cover is clamped between the nozzle and the lower end of the arc torch pipe, a containing chamber is formed between the sleeve and the arc torch pipe, and the containing chamber is provided with heat preservation material. The heating arc torch protection structure in the high-temperature furnace has the advantages of convenient maintenance, low maintenance cost, good protection effect on the arc torch pipe and the like, can be adjusted according to the temperature characteristics in the furnace during use, improves the service life of the protection structure, meanwhile, the protection structure does not take away a large amount of heat in the furnace and does not affect the temperature field design in the furnace. The heating arc torch protection structure can adapt to different furnace types and meet the needs of different installation states of the heating arc torch.

Description

Technical Field

[0001] This invention belongs to the field of heating structure technology, specifically relating to the heating arc torch protection structure in a high-temperature furnace. Background Technology

[0002] In high-temperature heating furnaces, a heating torch extending from the top heats the interior of the furnace. Since the torch itself is typically made of metal, and the temperature inside the furnace is extremely high, a water-cooling structure or a heat-insulating protective sleeve is usually installed on the torch to ensure its long-term operation under these conditions. While water cooling provides good protection for the torch, it removes a significant amount of heat from the furnace, affecting the temperature gradient distribution within the furnace. Utility model patent CN 215030408U describes a protective sleeve supported by ceramic or graphite materials in the form of a protruding bracket, with refractory felt or porous high-temperature resistant ceramic material placed between the protective sleeve and the heating torch. This type of heat-insulating protective sleeve better protects the main structure, preventing structural stability from being affected by dimensional changes due to thermal expansion of components under high-temperature conditions. However, this type of protective sleeve, supported by a protruding bracket, requires complete disassembly and replacement if localized damage occurs after long-term use, making maintenance difficult and costly. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a heating arc torch protection structure in a high-temperature furnace, wherein the heating arc torch includes an arc torch tube and a nozzle installed at the lower end of the arc torch tube, and the protection structure includes a sleeve, an upper cover, and a lower cover. The sleeve is composed of several sheaths connected in sequence. The upper cover has an upper through hole in the middle for the upper end of the arc torch tube to pass through. The upper end of the sleeve supports the circumference of the upper cover, and the lower end of the sleeve is placed on the lower cover. A connecting section is fixedly connected to the lower end of the arc torch tube. The nozzle is threaded or snapped into the connecting section. The lower cover has a lower through hole in the middle for the lower end of the connecting section to pass through. The inner side of the lower cover is sandwiched between the nozzle and the lower end of the arc torch tube. A receiving chamber is formed between the sleeve and the arc torch tube, and the receiving chamber is filled with heat-insulating material.

[0004] As a preferred embodiment of the above technical solution, the upper end face of the sheath is provided with a number of evenly spaced arc-shaped protrusions, the lower end face of the sheath is provided with a number of evenly spaced arc-shaped grooves, the upper surface of the lower cover is provided with a number of arc-shaped protrusions, and the lower surface of the upper cover is provided with a number of arc-shaped grooves. The arc-shaped grooves correspond one-to-one with the arc-shaped protrusions, and the arc-shaped protrusions on the next sheath are respectively inserted into the arc-shaped grooves on the previous sheath.

[0005] As a preferred embodiment of the above technical solution, the upper cover is composed of several upper fan-shaped covers spliced ​​together, each upper fan-shaped cover having at least one arc-shaped groove, and the lower cover is composed of several lower fan-shaped covers spliced ​​together, each lower fan-shaped cover having at least one arc-shaped protrusion.

[0006] As a preferred embodiment of the above technical solution, the upper fan-shaped cover has an upper locking protrusion on one side and an upper locking groove on the other side, and the upper locking protrusion of the upper fan-shaped cover is engaged in the upper locking groove of the adjacent upper fan-shaped cover. The lower fan-shaped cover has a lower locking protrusion on one side and a lower locking groove on the other side, and the lower locking protrusion of the lower fan-shaped cover is engaged in the lower locking groove of the adjacent lower fan-shaped cover.

[0007] As a preferred embodiment of the above technical solution, the diameter of the arc-shaped protrusion is smaller than the diameter of the arc-shaped groove, and the length of the arc-shaped protrusion is smaller than the length of the arc-shaped groove.

[0008] As a preferred embodiment of the above technical solution, the sheath includes a uniform diameter sheath and an eccentric sheath. The center of the inner circle and the center of the outer circle of the uniform diameter sheath are located at the same position, while the center of the inner circle and the center of the outer circle of the eccentric sheath are located at different positions. The centers of all the arc-shaped protrusions on the sheath are located at the same position as the center of the inner circle of the sheath, and the centers of all the arc-shaped grooves on the sheath are located at the same position as the center of the inner circle of the sheath.

[0009] As a preferred embodiment of the above technical solution, a number of support plates are fixedly connected around the nozzle, and the diameter of the virtual circle formed by the support plates is smaller than the diameter of the inner circle of the sheath.

[0010] As a preferred embodiment of the above technical solution, the sheath is made of ceramic material or graphite material, and the insulation material is fire-resistant felt.

[0011] The beneficial effects of this invention are as follows: The heating torch protection structure in the high-temperature furnace of this invention has the advantages of convenient maintenance, low maintenance cost, and good protection effect on the torch tube. It can be adjusted according to the temperature characteristics inside the furnace during use, thereby improving the service life of the protection structure. At the same time, it does not carry away a large amount of heat from the furnace and does not affect the temperature field design inside the furnace. The heating torch protection structure can adapt to different furnace types and meet the needs of different installation states of the heating torch. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0013] Figure 2 This is a partial structural schematic diagram of the present invention;

[0014] Figure 3 This is a schematic diagram of the lower fan-shaped cover;

[0015] Figure 4 This is a schematic diagram of the upper fan-shaped cover;

[0016] Figure 5 This is a schematic diagram of the structure of the equal-diameter sheath;

[0017] Figure 6This is a schematic diagram of the eccentric sheath structure;

[0018] Figure 7 This is a structural diagram when adjacent sheaths are misaligned. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] like Figure 1-7As shown, the heating torch protection structure in a high-temperature furnace includes a torch tube 1 and a nozzle 2 installed at the lower end of the torch tube 1. The protection structure includes a sleeve, an upper cover 3, and a lower cover 4. The sleeve is composed of several sheaths 6 connected sequentially. The upper cover 3 has an upper through hole 5 in the middle for the upper end of the torch tube 1 to pass through. The upper end of the sleeve supports the circumference of the upper cover 3, and the lower end of the sleeve rests on the lower cover 4. A connecting section 7 is fixedly connected to the lower end of the torch tube 1, and the nozzle 2 is threadedly connected to the connecting section 7. The lower cover 4 has a lower through hole 8 in the middle for the lower end of the connecting section 7 to pass through. The inner side of the lower cover 4 is sandwiched between the nozzle 2 and the lower end of the torch tube 1, forming a receiving chamber 9 between the sleeve and the torch tube 1. The receiving chamber 9 is filled with insulation material. The sleeve is composed of sheaths 6 connected sequentially. When individual sheaths 6 are damaged, the corresponding sheath 6 can be replaced individually without replacing the entire sleeve, thus saving maintenance costs. The design of the upper cover 3 and the lower cover 4 ensures a certain degree of airtightness within the containment chamber 9, improving the insulation effect and thus enhancing the protection of the arc torch tube 1. Removing the upper cover 3 and the lower cover 4 allows for easy replacement of the insulation material.

[0023] Furthermore, the upper surface of the sheath 6 is provided with several evenly spaced arc-shaped protrusions 10, and the lower surface of the sheath 6 is provided with several evenly spaced arc-shaped grooves 11. The upper surface of the lower cover 4 is provided with several arc-shaped protrusions 10, and the lower surface of the upper cover 3 is provided with several arc-shaped grooves 11. The arc-shaped grooves 11 correspond one-to-one with the arc-shaped protrusions 10. The arc-shaped protrusions 10 on the next sheath 6 are inserted into the arc-shaped grooves 11 on the previous sheath 6. In this way, adjacent sheaths 6 are connected into a whole by the cooperation of the arc-shaped protrusions 10 and the arc-shaped grooves 11. Two adjacent sheaths 6 can also be rotated relative to each other before installation and then connected by inserting the arc-shaped protrusions 10 into the arc-shaped grooves 11. This allows for adjustment of the orientation angle of the sheaths 6 after long-term use, changing the orientation of parts showing signs of damage, and extending the service life of the sheaths 6.

[0024] Furthermore, the upper cover 3 is composed of several upper fan-shaped covers 12, each upper fan-shaped cover 12 having at least one arc-shaped groove 11; the lower cover 4 is composed of several lower fan-shaped covers 13, each lower fan-shaped cover 13 having at least one arc-shaped protrusion 10. The upper cover 3 can be disassembled into multiple upper fan-shaped covers 12, and the lower cover 4 can be disassembled into multiple lower fan-shaped covers 13. This facilitates the replacement of the protective sleeve 6 and the insulation material.

[0025] Furthermore, the upper fan-shaped cover 12 has an upper locking protrusion 14 on one side and an upper locking groove on the other side. The upper locking protrusion 14 of the upper fan-shaped cover 12 engages with the upper locking groove of the adjacent upper fan-shaped cover 12. The lower fan-shaped cover 13 has a lower locking protrusion on one side and a lower locking groove 15 on the other side. The lower locking protrusion of the lower fan-shaped cover 13 engages with the lower locking groove 15 of the adjacent lower fan-shaped cover 13. When the upper fan-shaped covers 12 are spliced ​​together to form the upper cover 3, the upper locking protrusion 14 of the upper fan-shaped cover 12 engages with the upper locking groove of the adjacent upper fan-shaped cover 12. In this way, the upper cover 3 formed by splicing together can be connected as a whole, obtain sufficient structural strength, and remain stable during use. The lower cover 4 formed by splicing the lower fan-shaped covers 13 also has sufficient structural strength. When it is necessary to replace the sheath 6 and the internal insulation material, the lower fan-shaped cover 13 or the upper fan-shaped cover 12 can be moved radially to easily disassemble the upper cover 3 or the lower cover 4.

[0026] Furthermore, the diameter of the arc-shaped protrusion 10 is smaller than the diameter of the arc-shaped groove 11, and the length of the arc-shaped protrusion 10 is smaller than the length of the arc-shaped groove 11. This allows adjacent sheaths 6 to be axially offset, meaning the two sheaths 6 can be finely adjusted radially relative to each other as needed to adapt to the temperature distribution within the furnace. For example, the sheath 6 can be slightly adjusted towards the side with a higher temperature to prevent the arc torch tube 1 from being affected by a higher temperature, thus promoting uniform heating of the arc torch tube 1.

[0027] Furthermore, the sheath 6 includes a uniform diameter sheath 20 and an eccentric sheath 21. The center of the inner circle and the center of the outer circle of the uniform diameter sheath 20 are located at the same position, while the center of the inner circle and the center of the outer circle of the eccentric sheath 21 are located at different positions. The centers of all the arc-shaped protrusions 10 on the sheath 6 are located at the same position as the center of the inner circle of the sheath 6, and the centers of all the arc-shaped grooves 11 on the sheath 6 are located at the same position as the center of the inner circle of the sheath 6. The eccentric sheath 21 can be selectively installed as needed. The thicker side of the eccentric sheath 21 can face the high-temperature side of the furnace, so that the sheath 6 faces the high-temperature position in the furnace and is not easily damaged, and the arc torch tube 1 at the corresponding position is not easily damaged. When the heating arc torch is installed at an angle, the thicker side tilts downwards to face the high-temperature heat flow directly and avoid local high-temperature circulation of the arc torch tube 1. In the lower temperature position, the uniform diameter sheath 20 is used. After the furnace body has been in use for a period of time, the eccentric sleeve 21 or the equal-diameter sleeve 20 can be rotated according to the usage conditions, so that the protective structure can be adjusted in time to adapt to the temperature conditions inside the furnace. In order to cooperate with the radial adjustment of the eccentric sleeve 21, the inner diameter of the upper cover 3 is larger than the diameter of the arc torch tube 1, so that a certain gap is formed between the inner circle of the upper cover 3 and the arc torch tube 1, and the upper cover 3 has a certain degree of freedom. A 30 is set on the upper cover 3, and the 30 is fitted onto the arc torch tube 1 through a sealing ring, covering the upper cover 3 and the gap formed between its inner circle and the arc torch tube 1.

[0028] Furthermore, several support plates 22 are fixedly connected around the nozzle 2, and the diameter of the virtual circle formed by the support plates 22 is smaller than the diameter of the inner circle of the protective sleeve 6. The support plates 22 provide a certain support for the lower fan-shaped cover 13. After the lower fan-shaped cover 13 is removed, the protective sleeve 6 can pass through the nozzle 2 for replacement and installation.

[0029] Furthermore, the sheath 6 is made of ceramic or graphite material, and the insulation material is fire-resistant felt. The arc-shaped protrusions 10 and arc-shaped grooves 11 on the sheath 6 are integrally formed. The fire-resistant felt provides heat insulation and, together with the sheath 6, prevents the arc torch tube 1 from being damaged due to excessive temperature.

[0030] It is worth mentioning that the technical features such as the heating torch involved in this patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated in detail.

[0031] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experimentation on the basis of the prior art should be within the scope of protection defined by the claims.

Claims

1. A protective structure for a heating arc torch in a high temperature furnace, said heating arc torch comprising an arc torch tube and a nozzle mounted at the lower end of the arc torch tube, characterized in that, The protection structure comprises a sleeve, an upper cover and a lower cover, the sleeve is composed of a plurality of sheaths connected in sequence, the upper cover is provided with an upper through hole in the middle for the upper end of the arc torch pipe to pass through, the upper end of the sleeve supports the periphery of the upper cover, the lower end of the sleeve is arranged on the lower cover, the lower end of the arc torch pipe is fixedly connected with a connecting section, the nozzle is threadedly connected or clamped with the connecting section, the lower cover is provided with a lower through hole in the middle for the lower end of the connecting section to pass through, the inner side of the lower cover is clamped between the nozzle and the lower end of the arc torch pipe, a containing chamber is formed between the sleeve and the arc torch pipe, the containing chamber is provided with heat preservation material, the upper end surface of the sheath is provided with a plurality of arc-shaped protrusions arranged uniformly and at intervals, the lower end surface of the sheath is provided with a plurality of arc-shaped grooves arranged uniformly and at intervals, the upper surface of the lower cover is provided with a plurality of arc-shaped protrusions, the lower surface of the upper cover is provided with a plurality of arc-shaped grooves, the arc-shaped grooves correspond to the arc-shaped protrusions one by one, the arc-shaped protrusions on the next sheath are respectively inserted into the arc-shaped grooves on the previous sheath, the upper cover is composed of a plurality of upper sector-shaped covers spliced, each upper sector-shaped cover is provided with at least one arc-shaped groove, the lower cover is composed of a plurality of lower sector-shaped covers spliced, each lower sector-shaped cover is provided with at least one arc-shaped protrusion.

2. The high-temperature furnace arc torch protection structure of claim 1, wherein, One side of the upper sector-shaped cover is provided with an upper clamping protrusion, and the other side is provided with an upper clamping groove, the upper clamping protrusion of the upper sector-shaped cover is clamped into the upper clamping groove of the adjacent upper sector-shaped cover, one side of the lower sector-shaped cover is provided with a lower clamping protrusion, and the other side is provided with a lower clamping groove, the lower clamping protrusion of the lower sector-shaped cover is clamped into the lower clamping groove of the adjacent lower sector-shaped cover.

3. The high-temperature furnace arc torch protection structure of claim 2, wherein, The diameter of the arc-shaped protrusion is smaller than the diameter of the arc-shaped groove, and the length of the arc-shaped protrusion is smaller than the length of the arc-shaped groove.

4. The high-temperature furnace heating arc torch protection structure of claim 3, wherein, The sheath comprises a constant-diameter sheath and an eccentric sheath, the center of the inner circle of the constant-diameter sheath and the center of the outer circle are located at the same position, the center of the inner circle of the eccentric sheath and the center of the outer circle are located at different positions, the centers of all the arc-shaped protrusions on the sheath and the center of the inner circle of the sheath are located at the same position, and the centers of all the arc-shaped grooves on the sheath and the center of the inner circle of the sheath are located at the same position.

5. The high-temperature furnace arc torch protection structure of claim 4, wherein, A plurality of supporting pieces are fixedly connected around the nozzle, and the diameter of a virtual circle surrounded by the supporting pieces is smaller than the diameter of the inner circle of the sheath.

6. The high-temperature furnace heating arc torch protection structure of claim 5, wherein, The sheath is made of ceramic material or graphite material, and the heat preservation material is refractory felt.

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