Connecting device for heating belt of vacuum furnace

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By using a combination of ceramic tubes and molybdenum plates in the vacuum furnace to seal the gaps between the ceramic tubes, mounting holes, and molybdenum plates, the heat leakage problem in the vacuum furnace was solved, and the effective thermal power and electrical conductivity reliability of the hot zone were improved.

CN224249860UActive Publication Date: 2026-05-15SHANGHAI HUISEN MTH INDAL FURNACES

View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: SHANGHAI HUISEN MTH INDAL FURNACES
Filing Date: 2025-06-04
Publication Date: 2026-05-15

AI Technical Summary

Technical Problem

In the existing technology, there are gaps between the ceramic tube and the mounting hole, and between the ceramic tube and the molybdenum plate, which leads to serious heat leakage in the vacuum furnace and affects the effective heat power.

Method used

The structure employs a combination of a ceramic tube, a first molybdenum sheet, a second molybdenum sheet, a third molybdenum sheet, and a molybdenum conductive plate. The first and second molybdenum sheets seal the gap between the ceramic tube and the molybdenum conductive plate, while the third molybdenum sheet seals the gap between the ceramic tube and the mounting hole, forming a stepped structure to improve installation stability and sealing effect.

Benefits of technology

It effectively reduces heat leakage, increases the effective thermal power of the hot zone of the vacuum furnace, enhances the installation stability and conductivity reliability of the molybdenum conductive plate, and simplifies modular manufacturing.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN224249860U_ABST

Patent Text Reader

Abstract

The utility model discloses a connecting device for a heating belt of a vacuum furnace. The connecting device comprises a ceramic tube, a first molybdenum sheet, a second molybdenum sheet, a third molybdenum sheet and a molybdenum conductive plate, the ceramic tube is of a hollow tubular structure with two open ends, the pair of molybdenum current-conducting plates are installed in the ceramic tube in a penetrating mode, the ceramic tube is embedded in an installation hole of a vacuum furnace hot area, one ends of the pair of molybdenum current-conducting plates are connected with a heating belt in the vacuum furnace hot area, and the other ends of the pair of molybdenum current-conducting plates are connected with a water-cooled electrode outside the vacuum furnace hot area; the first molybdenum sheet and the second molybdenum sheet are respectively plugged at two ends of the ceramic tube, and the pair of molybdenum conductive plates penetrate through the first molybdenum sheet and the second molybdenum sheet; and the third molybdenum sheet is of an annular structure and is circumferentially arranged on the outer wall of the ceramic tube, so that the third molybdenum sheet covers a gap between the ceramic tube and the mounting hole of the vacuum furnace hot area. The utility model relates to the technical field of vacuum heating equipment, and can solve the problem of serious heat leakage caused by gaps between a ceramic tube and a mounting hole and between the ceramic tube and a molybdenum plate in the prior art.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of vacuum heating equipment technology, and in particular to a vacuum furnace heating belt connection device. Background Technology

[0002] In a traditional vacuum furnace, the heating element and the water-cooled electrode are directly connected via a molybdenum plate. The heating element is located inside the hot zone of the vacuum furnace, while the water-cooled electrode is located outside the hot zone. A ceramic tube is installed on the hot zone through mounting holes, through which the molybdenum plate passes, connecting the heating element and the water-cooled electrode.

[0003] However, due to gaps between the ceramic tube and the mounting hole, and also between the ceramic tube and the molybdenum plate, heat leakage is severe, affecting the effective thermal power of the hot zone inside the vacuum furnace. Therefore, there is a need to provide a vacuum furnace heating belt connection device that can solve the problem of severe heat leakage caused by gaps between the ceramic tube and the mounting hole and between the ceramic tube and the molybdenum plate in the existing technology. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum furnace heating belt connection device that can solve the problem of severe heat leakage caused by gaps between the ceramic tube and the mounting hole and between the ceramic tube and the molybdenum plate in the prior art.

[0005] This utility model is implemented as follows:

[0006] A vacuum furnace heating belt connection device includes a ceramic tube, a first molybdenum sheet, a second molybdenum sheet, a third molybdenum sheet, and a molybdenum conductive plate. The ceramic tube is a hollow tubular structure with open ends. A pair of molybdenum conductive plates are installed through the ceramic tube. The ceramic tube is embedded in the mounting hole of the hot zone of the vacuum furnace, so that one end of the pair of molybdenum conductive plates is connected to the heating belt inside the hot zone of the vacuum furnace, and the other end of the pair of molybdenum conductive plates is connected to the water-cooled electrode outside the hot zone of the vacuum furnace. The first molybdenum sheet and the second molybdenum sheet are respectively installed to seal the two ends of the ceramic tube, and the pair of molybdenum conductive plates pass through the first molybdenum sheet and the second molybdenum sheet. The third molybdenum sheet has a ring-shaped structure and is circumferentially arranged on the outer wall of the ceramic tube, so that the third molybdenum sheet covers the gap between the ceramic tube and the mounting hole of the hot zone of the vacuum furnace.

[0007] The ceramic tube has a ceramic ring on the outer side of the end near the heating zone. The diameter of the ceramic ring is larger than the diameter of the ceramic tube, forming a stepped structure.

[0008] One end face of the ceramic ring is flush with one end face of the ceramic tube, so that the first molybdenum sheet is sealed on one end face of the ceramic tube and the ceramic ring; the other end face of the ceramic ring is connected to one end face of the third molybdenum sheet, and the other end face of the third molybdenum sheet is attached to the inner wall of the hot zone of the vacuum furnace and covers the gap between the ceramic tube and the mounting hole.

[0009] The diameter of the third molybdenum sheet is larger than the diameter of the first molybdenum sheet and the diameter of the mounting hole, and the diameter of the first molybdenum sheet is larger than the diameter of the ceramic ring; the ceramic tube, ceramic ring, first molybdenum sheet, second molybdenum sheet and third molybdenum sheet are coaxially arranged.

[0010] One end of the pair of molybdenum conductive plates is formed with a connecting hole, so that one end of the molybdenum conductive plate is fixedly connected to the heating belt through the connecting hole and the connector.

[0011] The other end of the pair of molybdenum conductive plates is formed with a connecting waist hole, the axis of which coincides with the axis of the molybdenum conductive plate, so that the other end of the molybdenum conductive plate is adjustablely connected to the water-cooled electrode through the connecting waist hole and the connector.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] 1. This utility model has a first molybdenum sheet and a second molybdenum sheet. By setting the first molybdenum sheet and the second molybdenum sheet at both ends of the ceramic tube, the gap between the ceramic tube and the molybdenum conductive plate can be sealed to prevent heat leakage. This is beneficial to improving the effective heat power of the hot zone of the vacuum furnace, and can also improve the stability and conductivity reliability of the molybdenum conductive plate installed through the ceramic tube.

[0014] 2. Because this utility model has a third molybdenum sheet, after the ceramic tube is embedded in the mounting hole of the hot zone of the vacuum furnace, the third molybdenum sheet can cover and seal the gap between the ceramic tube and the mounting hole to prevent heat leakage, which is conducive to further improving the effective heat power of the hot zone of the vacuum furnace.

[0015] 3. Because this utility model has a ceramic ring, which is set on the outer wall of the ceramic tube to form a stepped structure, it is convenient to embed the ceramic ring in the mounting hole. This is beneficial to improving the sealing effect of the third molybdenum sheet on the gap between the ceramic tube and the mounting hole and the installation and fixation of the molybdenum conductive plate. It is also easy to manufacture in a modular manner. Attached Figure Description

[0016] Figure 1 This is an installation diagram of the vacuum furnace heating belt connection device of this utility model;

[0017] Figure 2 This is a front view of the vacuum furnace heating belt connecting device of this utility model;

[0018] Figure 3 This is a side view of the vacuum furnace heating belt connecting device of this utility model;

[0019] Figure 4 This is a top view of the vacuum furnace heating belt connecting device of this utility model;

[0020] Figure 5 This is a perspective view of the vacuum furnace heating belt connection device of this utility model.

[0021] In the figure, 1 is a ceramic tube, 2 is the first molybdenum sheet, 3 is the second molybdenum sheet, 4 is the third molybdenum sheet, 5 is a molybdenum conductive plate, 51 is a connecting round hole, 52 is a connecting waist hole, 53 is a connector, 6 is the hot zone of the vacuum furnace, 7 is a water-cooled electrode, 8 is a heating belt, and 9 is a ceramic ring. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] Please see the appendix Figure 1 To be continued Figure 5 A vacuum furnace heating belt connection device includes a ceramic tube 1, a first molybdenum sheet 2, a second molybdenum sheet 3, a third molybdenum sheet 4, and a molybdenum conductive plate 5. The ceramic tube 1 is a hollow tubular structure with open ends. A pair of molybdenum conductive plates 5 are installed through the ceramic tube 1. The ceramic tube 1 is embedded in the mounting hole of the vacuum furnace hot zone 6, so that one end of the pair of molybdenum conductive plates 5 is connected to the heating belt 8 inside the vacuum furnace hot zone 6, and the other end of the pair of molybdenum conductive plates 5 is connected to the water-cooled electrode 7 outside the vacuum furnace hot zone 6. The first molybdenum sheet 2 and the second molybdenum sheet 3 are respectively sealed and installed at both ends of the ceramic tube 1, and the pair of molybdenum conductive plates 5 pass through the first molybdenum sheet 2 and the second molybdenum sheet 3. The third molybdenum sheet 4 has an annular structure and is circumferentially arranged on the outer wall of the ceramic tube 1, so that the third molybdenum sheet 4 covers the gap between the ceramic tube 1 and the mounting hole of the vacuum furnace hot zone 6.

[0024] The first molybdenum sheet 2 and the second molybdenum sheet 3 are installed at both ends of the ceramic tube 1 to seal the gap between the ceramic tube 1 and the molybdenum conductive plate 5, thereby reducing heat leakage. The third molybdenum sheet 4 is installed on the outer wall of the ceramic tube 1. When the ceramic tube 1 is inserted into the mounting hole of the vacuum furnace hot zone 6, the third molybdenum sheet 4 covers the gap between the ceramic tube 1 and the mounting hole of the vacuum furnace hot zone 6, further reducing heat leakage and improving the effective thermal power of the vacuum furnace hot zone 6.

[0025] Through holes matching the cross-section of a pair of molybdenum conductive plates 5 are pre-drilled on the first molybdenum sheet 2 and the second molybdenum sheet 3 for through-hole installation of the pair of molybdenum conductive plates 5, ensuring reliable installation and conductivity. The two ends of the pair of molybdenum conductive plates 5 can be connected to the water-cooled electrode 7 and the heating band 8 via bolts to ensure conductivity.

[0026] The ceramic material of the ceramic tube 1 has an insulating effect. The ceramic tube 1 is preferably cylindrical. The inner diameter of the ceramic tube 1 can be adapted to the size of the molybdenum conductive plate 5, so as to play the role of electrical insulation and fixing the molybdenum conductive plate 5.

[0027] Please see the appendix Figure 1 To be continued Figure 3 The ceramic tube 1 is provided with a ceramic ring 9 on the outer side of the end near the heating belt 8. The diameter of the ceramic ring 9 is larger than the diameter of the ceramic tube 1, forming a stepped structure.

[0028] The stepped structure formed by connecting the ceramic tube 1 and the ceramic ring 9 makes it easier to insert the ceramic tube 1 into the mounting hole. The ceramic ring 9 abuts the third molybdenum sheet 4 against the inner wall of the mounting hole (with the end located inside the hot zone 6 of the heating furnace as the inner end and the end located outside the hot zone 6 of the heating furnace as the outer end). The installation is reliable and not easy to fall off, and the third molybdenum sheet 4 completely seals the gap between the ceramic tube 1 and the mounting hole.

[0029] Please see the appendix Figure 2 and attached Figure 3 One end face of the ceramic ring 9 is flush with one end face of the ceramic tube 1, so that the first molybdenum sheet 2 is sealed on one end face of the ceramic tube 1 and the ceramic ring 9; the other end face of the ceramic ring 9 is connected to one end face of the third molybdenum sheet 4, and the other end face of the third molybdenum sheet 4 is attached to the inner wall of the hot zone 6 of the vacuum furnace and covers the gap between the ceramic tube 1 and the mounting hole.

[0030] The ceramic tube 1, ceramic ring 9, first molybdenum sheet 2 and third molybdenum sheet 4 are connected to form a whole, which facilitates the fixed installation of molybdenum conductive plate 5.

[0031] Please see the appendix Figure 2 and attached Figure 3 The diameter of the third molybdenum sheet 4 is greater than the diameter of the first molybdenum sheet 2 and the diameter of the mounting hole, and the diameter of the first molybdenum sheet 2 is greater than the diameter of the ceramic ring 9; the ceramic tube 1, the ceramic ring 9, the first molybdenum sheet 2, the second molybdenum sheet 3 and the third molybdenum sheet 4 are coaxially arranged.

[0032] The ceramic ring 9 is sandwiched between the first molybdenum sheet 2 and the third molybdenum sheet 4, which facilitates installation and has a simple structure.

[0033] Please see the appendix Figure 3 One end of the pair of molybdenum conductive plates 5 is formed with a connecting round hole 51, so that one end of the molybdenum conductive plate 5 is fixedly connected to the heating belt 8 through the connecting round hole 51 and the connector 53.

[0034] Preferably, the connector 53 can be a bolt, and the size of the connecting hole 51 matches the size of the bolt, so that the molybdenum conductive plate 5 is reliably connected to the heating band 8 through the connecting hole 51 and the connector 53.

[0035] Please see the appendix Figure 3 The other end of the pair of molybdenum conductive plates 5 is formed with a connecting waist hole 52. The axis of the connecting waist hole 52 coincides with the axis of the molybdenum conductive plate 5, so that the other end of the molybdenum conductive plate 5 is adjustablely connected to the water-cooled electrode 7 through the connecting waist hole 52 and the connector 53.

[0036] By connecting the waist hole 52, the molybdenum conductive plate 5 has a certain axial adjustment range when connected to the water-cooled motor 7, thereby avoiding the problem of the molybdenum conductive plate 5 and the water-cooled motor 7 being unable to connect due to processing errors, installation errors, etc.

[0037] The size of the connecting waist hole 52 can be adapted to the actual connection requirements and allowable error.

[0038] Please see the appendix Figure 1 To be continued Figure 5 The installation method and working principle of this utility model are as follows:

[0039] A pair of molybdenum conductive plates 5 are passed through the ceramic tube 1 and the first molybdenum sheet 2 and the second molybdenum sheet 3 at both ends. The ceramic tube 1 with the molybdenum conductive plates 5 is then installed into the mounting hole of the hot zone 6 of the heating furnace, so that one end of the pair of molybdenum conductive plates 5 is located inside the hot zone 6 of the heating furnace and connected to the heating belt 8, and the other end of the pair of molybdenum conductive plates 5 is located outside the hot zone 6 of the heating furnace and connected to the water-cooled electrode 7.

[0040] The thickness and size of the molybdenum conductive plate 5 can be adjusted adaptively according to the actual heating current without affecting the structure of the ceramic tube 1. The ceramic tube 1 and the ceramic ring 9 can be made into modular parts, and the ceramic tube 1 and the ceramic ring 9 are easy to manufacture.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A vacuum furnace heating belt connecting device, characterized in that: The system includes a ceramic tube (1), a first molybdenum sheet (2), a second molybdenum sheet (3), a third molybdenum sheet (4), and a molybdenum conductive plate (5). The ceramic tube (1) is a hollow tubular structure with open ends. A pair of molybdenum conductive plates (5) are installed inside the ceramic tube (1). The ceramic tube (1) is embedded in the mounting hole of the hot zone (6) of the vacuum furnace, so that one end of the pair of molybdenum conductive plates (5) is connected to the heating belt (8) inside the hot zone (6) of the vacuum furnace, and the other end of the pair of molybdenum conductive plates (5) is connected to the water-cooled electrode (7) outside the hot zone (6) of the vacuum furnace. The first molybdenum sheet (2) and the second molybdenum sheet (3) are respectively sealed and installed at both ends of the ceramic tube (1). A pair of molybdenum conductive plates (5) pass through the first molybdenum sheet (2) and the second molybdenum sheet (3). The third molybdenum sheet (4) has a ring structure and is circumferentially arranged on the outer wall of the ceramic tube (1), so that the third molybdenum sheet (4) covers the gap between the ceramic tube (1) and the mounting hole of the hot zone (6) of the vacuum furnace.

2. The vacuum furnace heating belt connecting device according to claim 1, characterized in that: The ceramic tube (1) has a ceramic ring (9) on the outer side of the end near the heating belt (8). The diameter of the ceramic ring (9) is larger than the diameter of the ceramic tube (1), forming a stepped structure.

3. The vacuum furnace heating belt connecting device according to claim 2, characterized in that: One end face of the ceramic ring (9) is flush with one end face of the ceramic tube (1), so that the first molybdenum sheet (2) is sealed on one end face of the ceramic tube (1) and the ceramic ring (9); the other end face of the ceramic ring (9) is connected to one end face of the third molybdenum sheet (4), and the other end face of the third molybdenum sheet (4) is attached to the inner wall of the hot zone (6) of the vacuum furnace and covers the gap between the ceramic tube (1) and the mounting hole.

4. The vacuum furnace heating belt connecting device according to claim 3, characterized in that: The diameter of the third molybdenum sheet (4) is greater than the diameter of the first molybdenum sheet (2) and the diameter of the mounting hole. The diameter of the first molybdenum sheet (2) is greater than the diameter of the ceramic ring (9). The ceramic tube (1), ceramic ring (9), first molybdenum sheet (2), second molybdenum sheet (3) and third molybdenum sheet (4) are coaxially arranged.

5. The vacuum furnace heating belt connecting device according to claim 1, characterized in that: One end of the pair of molybdenum conductive plates (5) is formed with a connecting hole (51), so that one end of the molybdenum conductive plate (5) is fixedly connected to the heating belt (8) through the connecting hole (51) and the connector (53).

6. The vacuum furnace heating belt connecting device according to claim 1 or 5, characterized in that: The other end of the pair of molybdenum conductive plates (5) is formed with a connecting waist hole (52), the axis of the connecting waist hole (52) coincides with the axis of the molybdenum conductive plate (5), so that the other end of the molybdenum conductive plate (5) is adjustablely connected to the water-cooled electrode (7) through the connecting waist hole (52) and the connector (53).