CN212620052U - Hearth heating structure suitable for silicon carbide fiber heat treatment and roller hearth furnace - Google Patents
Hearth heating structure suitable for silicon carbide fiber heat treatment and roller hearth furnace Download PDFInfo
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- CN212620052U CN212620052U CN202020712580.8U CN202020712580U CN212620052U CN 212620052 U CN212620052 U CN 212620052U CN 202020712580 U CN202020712580 U CN 202020712580U CN 212620052 U CN212620052 U CN 212620052U
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Abstract
The utility model discloses a furnace heating structure suitable for carborundum fibre thermal treatment, including last heating element and lower heating element, still include separation baffle and lower separation baffle, it locates to go up separation baffle go up the heating element below, separation baffle locates down the heating element top down. The utility model further discloses a roller hearth furnace suitable for carborundum fibre thermal treatment, including furnace, still include foretell furnace heating structure. The utility model has the advantages of simple and reliable structure, being favorable for improving the temperature uniformity in the hearth and meeting the harsh environmental requirements of the silicon carbide fiber heat treatment process.
Description
Technical Field
The utility model relates to a silicon carbide fiber heat treatment device especially relates to a furnace heating structure and roller hearth furnace suitable for silicon carbide fiber heat treatment.
Background
The existing roller furnace generally adopts a single independent heating element arranged at the upper side and the lower side of a hearth at a certain distance, saggars are conveyed and passed by a middle bearing material, the temperature of the saggars in the hearth is uneven due to the fact that the heating elements are spaced and overlapped with the influence of air flow in the furnace, and in the production process of silicon carbide fibers, the requirement on process parameters is very high when the continuous production of a non-melting treatment process and a thermal crosslinking treatment process of intermediate products Polycarbosilane (PCS) fibers is carried out, the maximum use temperature of the non-melting treatment is about 250 ℃, the maximum use temperature of the thermal crosslinking treatment is about 500 ℃, and under the condition of low temperature, the uniformity of the temperature of the saggars in the hearth is very difficult to reach +/-5 ℃. Further, in order to improve the temperature uniformity in the furnace of the device, the number of elements is increased due to the small distance between the heating elements, and when the number of elements is large, each heating element needs to be installed and replaced one by one, which is time-consuming.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a simple structure, reliable, be favorable to improving temperature uniformity in the furnace, satisfy the furnace heating structure of the harsh environmental requirement of carborundum fibre heat treatment process.
The utility model further provides a roller hearth furnace suitable for carborundum fibre heat treatment.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a furnace heating structure suitable for carborundum fibre thermal treatment, includes heating element and lower heating element, still includes separation baffle and lower separation baffle, it locates to go up separation baffle last heating element below, separation baffle locates down heating element top down.
As a further improvement of the above technical solution: the lower heating assembly and the lower separation partition plate are provided with a preheating buffer layer, and the lower separation partition plate is provided with a plurality of vent holes uniformly.
As a further improvement of the above technical solution: the area of the upper heating assembly covering the upper separation partition plate and the area of the lower heating assembly covering the lower separation partition plate are not less than 85%.
As a further improvement of the above technical solution: the upper heating assembly and the lower heating assembly respectively comprise a drawer box, heating resistance wires, supporting tubes and positioning bricks, the drawer box is provided with a track, the positioning bricks are respectively arranged at two ends of the drawer box, a plurality of positioning grooves are uniformly formed in the positioning bricks, the supporting tubes are provided with a plurality of positioning grooves corresponding to the end portions one to one, and the heating resistance wires are wound on the supporting tubes.
As a further improvement of the above technical solution: the supporting tube is a corundum tube.
A roller hearth furnace suitable for heat treatment of silicon carbide fibers comprises a hearth and further comprises the hearth heating structure.
Compared with the prior art, the utility model has the advantages of: the utility model discloses a furnace heating structure suitable for carborundum fibre thermal treatment, both sides realize the full coverage through last separation baffle and lower separation baffle respectively about furnace, separation baffle separation furnace and last heating element on the utilization, separation baffle separation furnace and lower heating element under the utilization, it no longer directly heats the material in the furnace with lower heating element to go up heating element, but the separation baffle that radiant heating corresponds earlier, the separation baffle heats the interior material of furnace with whole board heat transfer radiation form again after being heated, satisfy carborundum fibre production harsh technology environment demand, accomplish casket bowl surrounding temperature homogeneity less than or equal to +/-5 ℃ in the furnace between the process service temperature 250 ℃ -500 ℃ in the furnace, and the temperature in the furnace exceeds behind 500 ℃, the temperature is higher, the temperature homogeneity is better in the furnace, overall structure is simple, reliable.
The roller furnace suitable for the heat treatment of the silicon carbide fiber, disclosed by the invention, comprises the hearth heating structure, so that the advantages are also achieved.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic side view of the present invention.
Fig. 3 is a schematic structural view of the lower separation plate of the present invention.
Fig. 4 is a schematic perspective view of the heating assembly of the present invention.
The reference numerals in the figures denote: 1. an upper heating assembly; 2. a lower heating assembly; 3. an upper separation baffle; 4. a lower separation baffle; 41. a vent hole; 42. preheating a buffer layer; 5. a hearth; 6. a drawer box; 61. a track; 7. heating resistance wires; 8. supporting a tube; 9. positioning the brick; 91. and (6) positioning a groove.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples.
Fig. 1 to 4 show an embodiment of a furnace heating structure suitable for silicon carbide fiber heat treatment of the present invention, the furnace heating structure suitable for silicon carbide fiber heat treatment of the present embodiment, including upper heating element 1 and lower heating element 2, further includes upper separation plate 3 and lower separation plate 4, upper separation plate 3 is located below upper heating element 1, and lower separation plate 4 is located above lower heating element 2.
The hearth heating structure suitable for the silicon carbide fiber heat treatment is characterized in that the upper side and the lower side of a hearth 5 are respectively covered completely by an upper separation partition plate 3 and a lower separation partition plate 4, the upper separation partition plate 3 is used for separating the hearth 5 from an upper heating assembly 1, the lower separation partition plate 4 is used for separating the hearth 5 from a lower heating assembly 2, the upper heating assembly 1 and the lower heating assembly 2 do not directly heat materials in the hearth 5, the corresponding separation partition plates are heated by radiation, the materials in the hearth 5 are heated by a whole-plate heat transfer radiation mode after the separation partition plates are heated, the harsh technological environment requirements of silicon carbide fiber production are met, the temperature uniformity around a pot box in the hearth 5 is smaller than or equal to +/-5 ℃ between 250 ℃ and 500 ℃ of the process use temperature in the hearth 5, the higher temperature is after the temperature in the hearth exceeds 500 ℃, the better temperature uniformity is obtained in the hearth 5, the integral structure is simple, And (4) reliability.
Further, in the present embodiment, a preheating buffer layer 42 is disposed between the lower heating element 2 and the lower separation plate 4, and a plurality of vent holes 41 are uniformly disposed on the lower separation plate 4. The process atmosphere is fully preheated by the preheating buffer layer 42 and then uniformly dispersed into the hearth 5 through the vent holes 41 on the lower separation partition plate 4, which is beneficial to preventing the process atmosphere from influencing the temperature uniformity in the hearth 5. Preferably, the upper separation partition 3 is also uniformly provided with a plurality of vent holes 41.
As a preferable technical solution, in the present embodiment, the area of the upper heating module 1 covering the upper separation barrier 3 and the area of the lower heating module 2 covering the lower separation barrier 4 are not less than 85%.
Further, in this embodiment, the upper heating element 1 and the lower heating element 2 each include a drawer box 6, a heating resistor wire 7, a support tube 8 and a positioning brick 9, the drawer box 6 is provided with a track 61, the positioning bricks 9 are respectively disposed at two ends of the drawer box 6, a plurality of positioning grooves 91 are uniformly disposed on the positioning bricks 9, the support tube 8 is provided with a plurality of positioning grooves 91 which are corresponding to each other one by one at end portions, and the heating resistor wire 7 is wound on each support tube 8. The drawer box 6 is matched with the rail 61, so that the modular rapid replacement of the upper heating assembly and the lower heating assembly 2 can be realized, and the efficiency is improved; set up constant head tank 91 on the locating brick 9, 8 tip of stay tube are positioned in constant head tank 91, and heating resistor silk 7 twines on stay tube 8, and overall structure is simple, the reliability is high and be convenient for maintain.
In the present embodiment, the support tube 8 is a corundum tube.
The roller hearth furnace suitable for the heat treatment of the silicon carbide fibers comprises a hearth 5 and further comprises the hearth heating structure.
The roller furnace suitable for the heat treatment of the silicon carbide fiber comprises the hearth heating structure, so that the advantages are also achieved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. A furnace heating structure suitable for silicon carbide fiber heat treatment comprises an upper heating assembly (1) and a lower heating assembly (2), and is characterized in that: the heating device is characterized by further comprising an upper separation clapboard (3) and a lower separation clapboard (4), wherein the upper separation clapboard (3) is arranged below the upper heating assembly (1), and the lower separation clapboard (4) is arranged above the lower heating assembly (2).
2. The furnace heating structure suitable for the thermal treatment of silicon carbide fibers according to claim 1, wherein: the lower heating assembly (2) and the lower separation plate (4) are provided with a preheating buffer layer (42), and the lower separation plate (4) is provided with a plurality of vent holes (41).
3. The furnace heating structure suitable for the thermal treatment of silicon carbide fibers according to claim 1, wherein: the area of the upper heating assembly (1) covering the upper separation partition plate (3) and the area of the lower heating assembly (2) covering the lower separation partition plate (4) are not less than 85%.
4. The furnace heating structure suitable for the thermal treatment of silicon carbide fibers according to claim 1, 2 or 3, wherein: go up heating element (1) and lower heating element (2) and all include drawer box (6), heating resistor silk (7), stay tube (8) and location brick (9), drawer box (6) set track (61), location brick (9) branch is located the both ends of drawer box (6), evenly seted up a plurality of constant head tanks (91) on location brick (9), stay tube (8) are equipped with and locate a plurality ofly with just tip one-to-one locate in constant head tank (91), heating resistor silk (7) are around locating each on stay tube (8).
5. The furnace heating structure suitable for the thermal treatment of silicon carbide fibers according to claim 4, wherein: the supporting tube (8) is a corundum tube.
6. The utility model provides a roller hearth furnace suitable for carborundum fibre heat treatment, includes furnace (5), its characterized in that: further comprising the hearth heating structure of any one of claims 1 to 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202020712580.8U CN212620052U (en) | 2020-04-29 | 2020-04-29 | Hearth heating structure suitable for silicon carbide fiber heat treatment and roller hearth furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202020712580.8U CN212620052U (en) | 2020-04-29 | 2020-04-29 | Hearth heating structure suitable for silicon carbide fiber heat treatment and roller hearth furnace |
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CN212620052U true CN212620052U (en) | 2021-02-26 |
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CN202020712580.8U Active CN212620052U (en) | 2020-04-29 | 2020-04-29 | Hearth heating structure suitable for silicon carbide fiber heat treatment and roller hearth furnace |
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2020
- 2020-04-29 CN CN202020712580.8U patent/CN212620052U/en active Active
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