Power connection device of high-temperature insulation radiation type heater
By employing a segmented ceramic sheath tube and installing insulating spacers in a high-temperature insulated radiant heater, the problem of conductivity of the ceramic sheath tube at high temperatures was solved, thus achieving circuit stability and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGZHOU YOKI ELECTRIC
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-17
AI Technical Summary
At high temperatures, the insulation performance of the ceramic sheath decreases, causing conductivity between the conductor and the metal sheath, which leads to a tripping phenomenon.
The ceramic sheath tube adopts a segmented design, with the outer side being a low-temperature section and the inner side being a high-temperature section. An insulating spacer is placed between the two sections to ensure that the conductivity of the ceramic sheath tube in the high-temperature section does not affect the conductivity of the outer metal sheath tube.
This effectively prevents the ceramic sheath tube from conducting at high temperatures, preventing the power supply equipment from becoming energized or tripping, and ensuring the stability and safety of the circuit.
Smart Images
Figure CN224139161U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric heating equipment technology, specifically to a power connection device for a high-temperature insulated radiant heater. Background Technology
[0002] like Figure 2 As shown, the radiant heater includes a furnace chamber 1, with an insulation layer 2 tightly attached to the inner wall of the furnace chamber 1. Multiple conductors 3 are arranged at intervals inside the furnace chamber 1. The inner ends of the conductors 3 protrude inward from the insulation layer 2 and are connected to the insulation layer 2. The outer ends of the conductors 4 pass through the furnace chamber 1 and extend into the junction box 10 to connect to the power supply cable.
[0003] A ceramic sheath tube 5 and a metal sheath tube 6 are sequentially fitted around the conductor 3. Ceramic baffles 7 are provided at both ends of the ceramic sheath tube 5 and the metal sheath tube 6 and are limited by bolts. The outer ends of the ceramic sheath tube 5 and the metal sheath tube 6 extend into the junction box 10, and the inner ends protrude inward from the insulation layer 2. The temperature in the furnace reaches 1000℃. At high temperatures, the insulation performance of the ceramic sheath tube 5 decreases. The higher the temperature, the more obvious the decrease. When it reaches a certain level, it is almost conductive, causing the conductor 3 and the metal sheath tube 6 to conduct, resulting in a trip. Utility Model Content
[0004] The purpose of this invention is to provide a power connection device for a high-temperature insulated radiant heater, which can effectively solve the problems in the background art.
[0005] The technical solution to achieve the above objective is: a power connection device for a high-temperature insulated radiant heater, including a furnace chamber, an insulation layer tightly attached to the inner wall of the furnace chamber, a conductor disposed inside the furnace chamber, the outer end of the conductor extending out of the furnace chamber, and the inner end of the conductor protruding inward from the insulation layer.
[0006] The feature is that: a first ceramic sheath tube is positioned and sleeved on the outer conductor, and a metal sheath tube is also positioned and sleeved outside the first ceramic sheath tube; a second ceramic sheath tube is positioned and sleeved on the inner conductor; the outer end of the conductor extends out of the first ceramic sheath tube and the metal sheath tube; the inner end of the conductor extends out of the second ceramic sheath tube; and an insulating spacer is provided between the inner ends of the first ceramic sheath tube, the metal sheath tube and the second ceramic tube.
[0007] Furthermore, the first ceramic sheath tube and the metal sheath tube are inserted into the furnace chamber, and the distance between the inner wall of the furnace chamber and the inner end of the first ceramic sheath tube and the metal sheath tube is 0.1-1.5cm.
[0008] Furthermore, the electrical connection device is sealed to the furnace through a metal sheath.
[0009] Furthermore, the insulating spacer is a ceramic baffle with a diameter larger than the outer diameter of the metal sheath tube. A positioning nut is threaded between the ceramic baffle and the outer end of the second ceramic sheath tube. A first locking nut is threaded onto the conductor at the outer end of the first ceramic sheath tube and the metal sheath tube, and a second locking nut is threaded onto the conductor at the inner end of the second ceramic sheath tube.
[0010] The beneficial effects of this utility model are as follows: This utility model divides the ceramic sheath tube into two sections, namely a low-temperature section located on the outside and a high-temperature section located in the furnace. Therefore, even if the ceramic sheath tube in the high-temperature section is conductive, the ceramic baffle installed between them will not cause the metal sheath tube in the low-temperature section to be energized. Thus, it will not cause the power supply equipment to be energized or trip, effectively overcoming the technical problems in the prior art. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model;
[0012] Figure 2 This is a schematic diagram of the existing technology. Detailed Implementation
[0013] like Figure 1 , 2 As shown, the present invention includes a furnace chamber 11, an insulation layer 12 is tightly attached to the inner wall of the furnace chamber 11, and a conductor 13 is provided inside the furnace chamber 11. The outer end of the conductor 13 extends out of the furnace chamber 11, and the inner end of the conductor 12 protrudes inward from the insulation layer 12.
[0014] A first ceramic sheath tube 14 is positioned and sleeved on the outer conductor 12. A metal sheath tube 15 is also positioned and sleeved outside the first ceramic sheath tube 14. A second ceramic sheath tube 16 is positioned and sleeved outside the conductor 13 located in the furnace. The outer end of the conductor 12 extends out of the first ceramic sheath tube 14 and the metal sheath tube 15, and the inner end of the conductor 12 extends out of the second ceramic sheath tube 16. An insulating spacer 17 is provided between the inner ends of the first ceramic sheath tube 14 and the metal sheath tube 15 and the second ceramic tube 16. The insulating spacer 17 is a ceramic baffle with a diameter larger than the outer diameter of the metal sheath tube 15. A positioning nut 18 is threadedly connected between the insulating spacer 17 and the outer end of the second ceramic sheath tube 16.
[0015] The first ceramic sheath tube 14 and the metal sheath tube 15 are inserted into the furnace chamber 11. The electrical connection device is sealed and connected to the furnace chamber 1 through the metal sheath tube 15. The distance a between the inner wall of the furnace chamber 11 and the inner end of the first ceramic sheath tube 14 and the metal sheath tube 15 is 0.1-1.5cm.
[0016] A first locking nut 19 is threaded onto the conductor 13 at the outer end of the first ceramic sheath tube 14 and the metal sheath tube 15. A ceramic spacer 21 with a diameter larger than the outer diameter of the metal sheath tube 15 is also provided between the first locking nut 19 and the outer end of the first ceramic sheath tube 14 and the metal sheath tube 15. The first ceramic sheath tube 14 and the metal sheath tube 15 are positioned on the conductor 13 by the cooperation of the positioning nut 18 and the first locking nut 19. A second locking nut 20 is threaded onto the conductor 12 at the inner end of the second ceramic sheath tube 16. The second ceramic sheath tube 16 is positioned on the conductor 13 by the cooperation of the positioning nut 18 and the second locking nut 20.
[0017] This invention divides the ceramic sheath tube into two sections: a first ceramic sheath tube 14 (low-temperature section) located on the outside, and a second ceramic sheath tube 16 (high-temperature section) located in the furnace. Therefore, even if the second ceramic sheath tube 16 in the high-temperature section is conductive, the metal sheath tube 15 in the low-temperature section will not be conductive because an insulating spacer 17 is provided between them. Thus, the power supply equipment will not be energized or tripped, effectively overcoming the technical problems in the prior art.
Claims
1. A power connection device for a high-temperature insulated radiant heater, comprising a furnace chamber, an insulation layer tightly attached to the inner wall of the furnace chamber, a conductor disposed inside the furnace chamber, the outer end of the conductor extending out of the furnace chamber, and the inner end of the conductor protruding inward from the insulation layer. characterized in that A first ceramic sheath is positioned and sleeved on the outer conductor, and a metal sheath is also positioned and sleeved outside the first ceramic sheath. A second ceramic sheath is positioned and sleeved on the inner conductor. The outer end of the conductor extends out of the first ceramic sheath and the metal sheath, and the inner end of the conductor extends out of the second ceramic sheath. An insulating spacer is provided between the inner ends of the first ceramic sheath, the metal sheath, and the second ceramic tube.
2. A power connection device for a high temperature insulated radiant heater as claimed in claim 1, characterised in that: The first ceramic sheath tube and the metal sheath tube are inserted into the furnace chamber, and the distance between the inner wall of the furnace chamber and the inner end of the first ceramic sheath tube and the metal sheath tube is 0.1-1.5cm.
3. A power connection device for a high temperature insulated radiant heater as claimed in claim 2, characterised in that: The electrical connection device is sealed to the furnace through a metal sheath.
4. The power connection device for high temperature insulation radiant heater according to claim 1, wherein: The insulating spacer is a ceramic baffle with a diameter larger than the outer diameter of the metal sheath tube. A positioning nut is threaded between the ceramic baffle and the outer end of the second ceramic sheath tube. A first locking nut is threaded on the conductor at the outer end of the first ceramic sheath tube and the metal sheath tube. A second locking nut is threaded on the conductor at the inner end of the second ceramic sheath tube.