CN-224199528-U - Graphite heater for directional growth of precious stone

CN224199528UCN 224199528 UCN224199528 UCN 224199528UCN-224199528-U

Abstract

The utility model discloses a graphite heater for directional growth of precious stones, which is characterized in that a middle groove with the same size is additionally arranged between an upper groove and a lower groove in the circumferential direction of a graphite heater body, the middle groove is positioned at the lower part of the body, the middle groove is arranged to enable the resistance of the lower part of the body to be increased, under the condition of constant voltage, the current passing through the lower part of the body is reduced, and finally, when the body reaches heat balance, the heat of the lower part of the body is smaller than the heat of the upper part of the body, meanwhile, due to the fact that the middle groove is arranged at the lower part of the body, the heating area of the lower part of the body is smaller than the heating area of the upper part of the body, the heat of the lower part of the body and the heat of the upper part of the body are enabled to present a certain temperature difference, the temperature of the lower part of the body is low, so that the flow velocity of liquid below the crucible can be reduced, turbulent flow is formed in the crucible, the heat loss of the lower part of the crucible is reduced, heat loss area of the bottom the crucible is further, the heat compensation is carried out, the temperature difference of the crucible is reduced, and the environment of the whole temperature field is kept stable.

Inventors

DAI CHENGGONG
LU YI
YU JUN
WEI YONGCHANG

Assignees

四川晶蓝宝石科技发展有限公司

Dates

Publication Date: 20260505
Application Date: 20250428

Claims (9)

1. A graphite heater for directional growth of precious stones is characterized by comprising a body, wherein the body is of a cylindrical structure, a positive electrode part and a negative electrode part are arranged on the body, the positive electrode part and the negative electrode part are oppositely arranged on the body, a plurality of lower grooves are formed in the bottom of the body towards the top direction of the body at intervals, a plurality of upper grooves are formed in the top of the body towards the bottom direction of the body at intervals, the upper grooves and the lower grooves are arranged at intervals, and a middle groove is formed between the adjacent upper grooves and the lower grooves.
2. A graphite heater for use in directional growth of precious stones according to claim 1, wherein the intermediate grooves are the same as the spaces between the upper grooves and the lower grooves on the left and right sides thereof.
3. The graphite heater for directional growth of precious stones according to claim 1, characterized in that the bottom end of said intermediate tank is at the same level as the bottom end of the upper tank.
4. A graphite heater for gemstone directional growth as claimed in claim 1, wherein the height of the intermediate tank top end is less than the height of the lower tank top end.
5. The graphite heater for directional growth of precious stones according to claim 1, wherein the positive electrode part and the negative electrode part have the same structure and are both arc-shaped plate-like structures, and the middle parts of the positive electrode part and the negative electrode part are connected with the body.
6. The graphite heater for directional growth of precious stones according to claim 1, wherein the middle portion of said positive electrode portion is connected between adjacent lower grooves on the body, and said negative electrode portion is located on the opposite side of the positive electrode portion and is also connected between adjacent lower grooves on the body.
7. The graphite heater for directional growth of precious stones of claim 5, wherein the right and left sides of the positive electrode portion or the negative electrode portion are spaced apart from the body.
8. The graphite heater for directional growth of precious stones according to claim 1, wherein the widths of the upper groove, the lower groove and the intermediate groove are the same and are all 3mm to 5mm.
9. A graphite heater for use in directional growth of precious stones according to claim 1, characterised in that the thickness of the body is 8mm-10mm.

Description

Graphite heater for directional growth of precious stone Technical Field The utility model belongs to the technical field of precious stone processing, and particularly relates to a graphite heater for directional growth of precious stones. Background The cylindrical graphite heater is widely used in the aspect of Czochralski crystal pulling growth, a crucible is required to be placed in the graphite heater in the Czochralski crystal pulling growth process, the graphite heater is heated by utilizing a bottom heating seat in a conductive manner, so that raw materials in the crucible are melted, but a supporting seat is arranged at the bottom of the crucible, so that a certain heat loss is arranged below the crucible, a certain difference is formed between the upper temperature and the lower temperature in the crucible, when the difference exceeds a certain degree, the cultivation of the gemstone is influenced, even the macroscopic and the microstructure of a product are greatly influenced, the heater is required to be structurally improved, the adjustment of the local heating value of the heater is realized by adjusting the resistance of the graphite heater body, turbulence is formed in a part of the crucible, the flow velocity is slowed down to lock the heat quantity, the heat loss area at the bottom of the crucible is compensated by the heat quantity, the stable gradient of the whole temperature field environment is avoided, and the processing quality of the gemstone is ensured. Disclosure of utility model The utility model aims to provide a graphite heater for precious stone directional growth, wherein an intermediate groove with the same size is additionally arranged between an upper groove and a lower groove in the circumferential direction of a graphite heater body, the intermediate groove is positioned at the lower part of the body, the intermediate groove is arranged to enable the resistance of the lower part of the body to be increased, under the condition of constant voltage, the current passing through the lower part of the body is reduced, and finally the heat of the lower part of the body is smaller than the heat of the upper part of the body when the body reaches heat balance, meanwhile, the heating area of the lower part of the body is smaller than the heating area of the upper part of the body due to the fact that the intermediate groove is arranged at the lower part of the body, the heat of the lower part of the body and the heat of the upper part of the body are enabled to present a certain temperature difference, the temperature of the lower part of the body is low, so that the flow velocity of liquid in the lower part of a crucible can be reduced, turbulent flow is formed in the crucible, the heat loss of the lower part of the crucible is reduced, heat loss of the crucible bottom heat loss area is further, the temperature difference of the crucible is reduced, the temperature difference of the upper end and lower end of the crucible is kept stable. The utility model is realized by the following technical scheme: A graphite heater for directional growth of precious stones comprises a body, wherein the body is of a cylindrical structure, a positive electrode part and a negative electrode part are arranged on the body, the positive electrode part and the negative electrode part are oppositely arranged on the body, a plurality of lower grooves which are arranged at intervals are formed in the direction of the bottom of the body towards the top of the body, a plurality of upper grooves which are arranged at intervals are formed in the direction of the top of the body towards the bottom of the body, the upper grooves and the lower grooves are arranged at intervals, and a middle groove is arranged between the adjacent upper grooves and the lower grooves. Preferably, the intermediate groove is the same as the interval between the upper groove and the lower groove on the left and right sides thereof. Preferably, the bottom end of the middle groove is at the same level as the bottom end of the upper groove. Preferably, the height of the middle tank top end is smaller than the height of the lower tank top end. Preferably, the positive electrode part and the negative electrode part have the same structure and arc plate-shaped structures, and the middle parts of the positive electrode part and the negative electrode part are connected with the body. Preferably, the middle part of the positive electrode part is connected between the adjacent lower grooves on the body, and the negative electrode part is positioned at the opposite side of the positive electrode part and is also connected between the adjacent lower grooves on the body. Preferably, the left and right sides of the positive electrode part or the negative electrode part are spaced from the body. Preferably, the widths of the upper groove, the lower groove and the middle groove are the same and are all 3mm-5mm. Preferably, the thickness of the