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CN-224227292-U - Thermal insulation cylinder for single crystal growth furnace

CN224227292UCN 224227292 UCN224227292 UCN 224227292UCN-224227292-U

Abstract

The utility model discloses a heat preservation cylinder for a single crystal growth furnace, which relates to the technical field of heat preservation tools of single crystal growth furnaces and comprises a vacuum outer shell and a bracket fixedly connected with the lower end of the vacuum outer shell, wherein a circulating inner shell is arranged in the vacuum outer shell, the circulating inner shell and the vacuum outer shell are of a cavity structure, a thermocouple and an air inlet pipe are arranged on the periphery of the vacuum outer shell, and a stepping motor is arranged at the upper end of the vacuum outer shell.

Inventors

  • WANG XINXIN
  • SHI JIANNAN
  • SHI JIANKUN

Assignees

  • 河北岚鲸光电科技有限公司

Dates

Publication Date
20260512
Application Date
20250612

Claims (6)

  1. 1. The heat preservation cylinder for the single crystal growth furnace comprises a vacuum outer shell (1) and a support (2) fixedly connected to the lower end of the vacuum outer shell (1), and is characterized in that a circulating inner shell (10) is installed in the vacuum outer shell (1), the circulating inner shell (10) and the vacuum outer shell (1) are of a cavity structure, a thermocouple (4) and an air inlet pipe (5) are installed on the periphery of the vacuum outer shell (1), and a stepping motor (3) is installed at the upper end of the vacuum outer shell (1).
  2. 2. The heat preservation cylinder for the single crystal growth furnace according to claim 1, wherein the thermocouple (4) penetrates through the vacuum outer shell (1) and the upper end of the circulating inner shell (10), the tail end of the thermocouple (4) is suspended in a cavity of the circulating inner shell (10), the driving end of the stepping motor (3) is sleeved with a customized coupler (9), and the driving end of the stepping motor (3) is sleeved with a coating platform (11) through the coupler (9).
  3. 3. The heat preservation cylinder for a single crystal growth furnace according to claim 2, wherein the two ends of the inner side of the customized coupler (9) are provided with closed bearings, one side of the coupler is provided with a coating pipe (6), the coating table (11) is of a U-shaped cavity structure, the top end of the coating table (11) is sleeved with a fan-shaped table (8), and the fan-shaped table (8) is in bearing abutting connection with the inner side wall of the coupler (9).
  4. 4. The heat preservation cylinder for a single crystal growth furnace according to claim 3, wherein two sliding grooves are formed in one side of the coating table (11), a flexible high-temperature-resistant scraping plate (18) is hinged in the sliding grooves, one end of the scraping plate (18) is abutted against two springs (19), the other end of the springs (19) is abutted against one side of the sliding grooves, a plurality of equidistant one-way valves are arranged at two ends of an inner cavity of the coating table (11), and a plurality of equidistant heating blocks (12) are arranged on the inner side of the coating table (11).
  5. 5. The heat preservation cylinder for a single crystal growing furnace according to claim 1, wherein one side of the lower end of the circulating inner shell (10) is fixedly connected with a mounting table (13), a collecting table (15) is mounted at the lower end of the mounting table (13), the collecting table (15) is concave, an arc-shaped filter screen (14) is mounted at one end of the collecting table (15), the other end of the filter screen (14) is abutted to the lower end of the mounting table (13), and a filter shell (16) is mounted at the inner side of the filter screen (14).
  6. 6. The heat preservation cylinder for a single crystal growth furnace according to claim 5, wherein two pieces of active carbon (17) are arranged in the filter shell (16), the bottom end of the collecting table (15) is provided with an exhaust pipe (7), and the top end of the exhaust pipe (7) is positioned inside the filter shell (16).

Description

Thermal insulation cylinder for single crystal growth furnace Technical Field The utility model relates to the technical field of heat preservation tools of single crystal growth furnaces, in particular to a heat preservation cylinder for a single crystal growth furnace. Background In the field of single crystal growth furnaces, the heat preservation cylinder is used as a core component, the heat preservation performance, the coating application efficiency and the waste gas treatment capacity of the heat preservation cylinder directly influence the quality and the production safety of single crystal growth, and along with the fine development of a single crystal preparation process, higher requirements are put on the comprehensive performance of the heat preservation cylinder; At present, the traditional heat preservation cylinder for the single crystal growth furnace has obvious defects in a coating smearing link, the traditional device mostly adopts a manual or static spraying mode to apply reflective coating to the inner wall of the heat preservation layer, so that uniform coverage of the coating is difficult to realize, the inner wall is easy to remain and solidify or damage old coating after long-term use, the traditional rigid scraping plate cannot adaptively adjust strength in the cleaning and smearing process, the scraping plate is easy to abrade or even damage the heat preservation layer of the inner wall due to hard contact, the coating smearing quality and the service life of equipment are seriously influenced, and in addition, the process delay caused by low coating smearing efficiency further restricts the stability and the production efficiency of single crystal growth, so that the problems are needed to be improved. Disclosure of utility model The utility model aims to solve the defects in the prior art and provides a heat preservation cylinder for a single crystal growth furnace. The heat preservation cylinder for the single crystal growth furnace comprises a vacuum outer shell and a support fixedly connected to the lower end of the vacuum outer shell, wherein a circulating inner shell is arranged in the vacuum outer shell, the circulating inner shell and the vacuum outer shell are of a cavity structure, a thermocouple and an air inlet pipe are arranged on the periphery of the vacuum outer shell, and a stepping motor is arranged at the upper end of the vacuum outer shell. Preferably, the thermocouple penetrates through the vacuum outer shell and the upper end of the circulating inner shell, the tail end of the thermocouple is suspended in the cavity of the circulating inner shell, the driving end of the stepping motor is sleeved with a customized coupler, and the driving end of the stepping motor is sleeved with a coating platform through the coupler. Preferably, the sealed bearings are mounted at two ends of the inner side of the customized coupler, a coating pipe is mounted at one side of the coupler, the coating table is of a U-shaped cavity structure, a fan-shaped table is sleeved at the top end of the coating table, and the fan-shaped table bearings are abutted to the inner side wall of the coupler. Preferably, two sliding grooves are formed in one side of the coating table, flexible high-temperature-resistant scraping plates are hinged in the sliding grooves, two springs are abutted to one ends of the scraping plates, the other ends of the springs are abutted to one side of the sliding grooves, a plurality of equidistant one-way valves are arranged at two ends of the inner cavity of the coating table, and a plurality of equidistant heating blocks are arranged on the inner side of the coating table. Preferably, one side of the lower end of the circulating inner shell is fixedly connected with an installation table, the lower end of the installation table is provided with a collecting table, the collecting table is concave, one end of the collecting table is provided with an arc-shaped filter screen, the other end of the filter screen is abutted to the lower end of the installation table, the inner side of the filter screen is provided with a filter shell, Preferably, two pieces of activated carbon are arranged in the filter shell, the bottom end of the collecting table is provided with an exhaust pipe, and the top end of the exhaust pipe is positioned at the inner side of the filter shell. Compared with the prior art, the utility model has the beneficial effects that the effect of driving the coating platform to rotate and conveying the reflective coating is achieved through the matching between the stepping motor and the coupling and the coating platform, the problem that the coating of the traditional heat preservation cylinder is difficult to uniformly coat is solved, the coating efficiency and uniformity are improved, the effect of adaptively adjusting the coating force and uniformly scraping the coating is achieved through the matching between the scraping plate and the spring, the