Water-cooled electrode structure for vacuum furnace

Abstract

The utility model belongs to the technical field of vacuum furnace equipment, and particularly relates to a water-cooled electrode structure for a vacuum furnace. Comprising an electrode body, a combined insulating part and a fastening assembly, the electrode body is inserted into a mounting hole in a vacuum furnace body, and the electrode body and the vacuum furnace body are isolated through the combined insulating part; the inner side end and the outer side end of the electrode body are connected with a heating element in the vacuum furnace, the outer side end of the electrode body is locked and fixed through a fastening assembly, a cooling hole is formed in the outer side end of the electrode body along the axis, and cooling water is introduced into the cooling hole for heat dissipation. The utility model can be used in a corrosive atmosphere, and has the advantages of simple processing, no potential safety hazard, long service life and low production cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum furnace equipment, in particular to a water-cooled electrode structure for a vacuum furnace. Background Art

[0002] The function of the high temperature vacuum furnace water cooling electrode is to connect the heating element in the vacuum furnace with the heating power supply. As the use temperature of the vacuum sintering furnace gradually increases, the performance of the key component of the vacuum furnace water cooling electrode becomes more and more important. The performance of the vacuum furnace water cooling electrode determines the service life and ease of use of the vacuum furnace.

[0003] The existing water-cooled electrodes of vacuum furnaces are suitable for temperatures of 1700°C in vacuum furnaces and cannot be used in corrosive environments. With the increase in the operating temperature of vacuum sintering furnaces and the presence of corrosive substances in vacuum furnaces, the reliability and service life of water-cooled electrodes will be greatly affected. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a water-cooled electrode structure for a vacuum furnace to solve the problems of poor reliability and short service life of the existing water-cooled electrodes for vacuum furnaces when used in a corrosive environment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a water-cooled electrode structure for a vacuum furnace, comprising an electrode body, a combined insulating member and a fastening assembly, wherein the electrode body is inserted into a mounting hole on a vacuum furnace body, and the electrode body and the vacuum furnace body are isolated by the combined insulating member; the inner end of the electrode body is connected to a heating element in the vacuum furnace, the outer end of the electrode body is locked and fixed by the fastening assembly, the outer end of the electrode body is provided with a cooling hole along the axis, and cooling water is passed into the cooling hole to dissipate heat.

[0007] The inner end of the electrode body is axially positioned by a shaft shoulder, and a connection hole for connecting with a heating element in the vacuum furnace is provided on the end surface of the inner end of the electrode body along the axis.

[0008] The inner end of the electrode body is provided with a plurality of air holes in radial direction and communicated with the bottom of the connecting hole.

[0009] The combined insulating part includes an insulating protective tube and an insulating ring, wherein the insulating protective tube is a hollow T-shaped structure, the insulating protective tube is sleeved on the electrode body, the head of the insulating protective tube is located on the inner side of the vacuum furnace body, and is located between the axial shoulder of the electrode body and the vacuum furnace body; the insulating ring is sleeved on the electrode body, the insulating ring is located on the outer side of the vacuum furnace body, and is located between the fastening assembly and the vacuum furnace body.

[0010] Both sides of the head of the insulating protective tube are sealed with the vacuum furnace body through sealing rings and the axial shoulders of the electrode body.

[0011] The insulating ring is located outside the insulating protective tube, and a gap is left between the insulating protective tube and the electrode body.

[0012] The fastening assembly comprises a pressure ring and a locking nut, which are sequentially sleeved on the electrode body, and the locking nut is threadedly connected to the electrode body.

[0013] The advantages and positive effects of the utility model are as follows: the utility model provides a water-cooled electrode structure for a vacuum furnace, which is simple to process and has good sealing performance. The electrode can be used at a temperature of up to 1900°C (temperature inside the vacuum furnace), can be used in a corrosive atmosphere, has no safety hazards, has a long service life, and has a low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a water-cooled electrode structure for a vacuum furnace of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the electrode body in the utility model;

[0016] Figure 3 It is a structural schematic diagram of the combined insulating member in the utility model.

[0017] In the figure: 1 is an electrode body, 2 is a combined insulating part, 3 is a sealing ring, 4 is a pressure ring, 5 is a locking nut, 11 is a connecting hole, 12 is a vent hole, 13 is a sealing groove, 14 is a cooling hole, 21 is an insulating protective tube, and 22 is an insulating ring. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 , Figure 2 As shown, the utility model provides a water-cooled electrode structure for a vacuum furnace, comprising an electrode body 1, a combined insulating member 2 and a fastening assembly, wherein the electrode body 1 is inserted into a mounting hole on a vacuum furnace body, and the electrode body 1 and the vacuum furnace body are isolated by the combined insulating member 2; the inner end of the electrode body 1 is connected to a heating element in the vacuum furnace, and the outer end of the electrode body 1 is locked and fixed by a fastening assembly, and a cooling hole 14 is provided along the axis of the outer end of the electrode body 1, and cooling water is passed into the cooling hole 14 for heat dissipation.

[0020] like Figure 1 , Figure 2As shown, in the embodiment of the utility model, the inner end of the electrode body 1 is axially positioned by a shaft shoulder, and a connecting hole 11 for connecting with a heating element in a vacuum furnace is provided on the end surface of the inner end of the electrode body 1 along the axis.

[0021] Furthermore, the inner end of the electrode body 1 is provided with a plurality of air holes 12 in radial direction, which are connected to the bottom of the connecting hole 11. The outer end of the connecting hole 11 is provided with a chamfer to facilitate docking with the heating element in the vacuum furnace. In this embodiment, there are four air holes 12, which are evenly distributed at the inner end of the connecting hole 11 along the circumferential direction. The outer circumference of the outer end of the electrode body 1 is provided with an external thread to facilitate connection with the fastening component.

[0022] like Figure 1 , Figure 3 As shown, in the embodiment of the utility model, the combined insulating part 2 includes an insulating protective tube 21 and an insulating ring 22, wherein the insulating protective tube 21 is a hollow T-shaped structure, the insulating protective tube 21 is sleeved on the electrode body 1, and the head of the insulating protective tube 21 is located on the inner side of the vacuum furnace body and between the axial shoulder of the electrode body 1 and the vacuum furnace body; the insulating ring 22 is sleeved on the electrode body 1, and the insulating ring 22 is located on the outer side of the vacuum furnace body and between the fastening assembly and the vacuum furnace body.

[0023] Furthermore, both sides of the head of the insulating protective tube 21 are sealed with the vacuum furnace body through the sealing ring 3 and the axial shoulder of the electrode body 1. Specifically, an annular sealing groove 13 is provided on the axial shoulder of the electrode body 1, and the sealing ring 3 is accommodated in the sealing groove 13. The sealing ring 3 is made of high temperature resistant material to ensure that it can provide a good vacuum seal in a high temperature environment.

[0024] Furthermore, the insulating ring 22 is located outside the insulating protective tube 21 and is concentric therewith. The insulating ring 22 does not contact the insulating protective tube 21 , and a gap is left between the insulating protective tube 21 and the electrode body 1 .

[0025] like Figure 1 As shown, in an embodiment of the utility model, the fastening assembly includes a pressure ring 4 and a locking nut 5, which are sequentially sleeved on the electrode body 1, and the locking nut 5 is threadedly connected to the electrode body 1, and the pressure ring 4 and the insulating ring 22 are compressed by the locking nut 5.

[0026] In this embodiment, the electrode body 1 is provided with a cooling hole 14, and cooling water passes through the cooling hole 14 to provide overall heat dissipation for the electrode body 1. At the same time, the cooling hole 14 is close to the connecting hole 11, which ensures that the heat transferred through the connecting hole 11 can be dissipated through the cooling hole 14 in time, ensuring that the entire water-cooled electrode structure is not damaged due to excessive temperature, thereby increasing the service life and reducing electrode damage caused by overheating.

[0027] Specifically, the electrode body 1 is made of copper material and processed as a whole. It is an integrated machine with a cooling water jacket inside and a vent hole at the electrode connection position, which eliminates the problems of water leakage and large error caused by welding. At the same time, copper is easier to process and has lower cost than high-temperature resistant materials such as nickel and molybdenum.

[0028] Furthermore, the connection hole 11 of the electrode body 1 is rigidly connected to the heating element in the vacuum furnace, and the processing errors of each part are compensated by the gap between the electrode body 1 and the combined insulating member 2, ensuring that the electrode body 1 and the heating element in the vacuum furnace are closely matched, ensuring that the resistance of the heating element is not affected, and ensuring the performance of the high-temperature vacuum furnace. The air vent 12 prevents the closed cavity generated after the connection hole 11 is connected to the heating element in the vacuum furnace, and improves the ultimate vacuum degree of the entire high-temperature vacuum furnace.

[0029] Furthermore, the insulating protective tube 21 and the insulating ring 22 are made of polytetrafluoroethylene, which is easy to process and has excellent performance, ensuring the insulation effect between the electrode and other components. The insulating protective tube 21 is on the inner side of the electrode and is easy to install.

[0030] The utility model provides a water-cooled electrode structure for a high-temperature vacuum furnace, which has a simple structure, is easy to process, has high cooling efficiency, and is easy to repair and replace. It avoids the problems of split electrodes being prone to water leakage, complex structures, and difficult replacement. The utility model not only ensures the service life of the water-cooled electrode structure of the high-temperature vacuum furnace, reduces the cost of maintenance and processing, but more importantly, improves the safety of the high-temperature vacuum furnace through a simpler structure.

[0031] The above description is only an implementation method of the utility model and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims

1. A water-cooled electrode structure for a vacuum furnace, characterized in that: The invention comprises an electrode body (1), a combined insulating member (2) and a fastening assembly, wherein the electrode body (1) is inserted into a mounting hole on a vacuum furnace body, and the electrode body (1) and the vacuum furnace body are isolated by the combined insulating member (2); the inner end of the electrode body (1) is connected to a heating element in the vacuum furnace, and the outer end of the electrode body (1) is locked and fixed by the fastening assembly; the outer end of the electrode body (1) is provided with a cooling hole (14) along the axis, and cooling water is passed into the cooling hole (14) to dissipate heat.

2. The water-cooled electrode structure for a vacuum furnace according to claim 1, characterized in that: The inner end of the electrode body (1) is axially positioned by a shaft shoulder, and a connection hole (11) for connecting to a heating element in the vacuum furnace is provided on the end surface of the inner end of the electrode body (1) along the axis.

3. The water-cooled electrode structure for a vacuum furnace according to claim 2, characterized in that: The inner end of the electrode body (1) is provided with a plurality of air holes (12) in radial direction and connected to the bottom of the connecting hole (11).

4. The water-cooled electrode structure for a vacuum furnace according to claim 2, characterized in that: The combined insulating member (2) comprises an insulating protective tube (21) and an insulating ring (22), wherein the insulating protective tube (21) is a hollow T-shaped structure, the insulating protective tube (21) is sleeved on the electrode body (1), the head of the insulating protective tube (21) is located inside the vacuum furnace body, and between the axial shoulder of the electrode body (1) and the vacuum furnace body; the insulating ring (22) is sleeved on the electrode body (1), the insulating ring (22) is located outside the vacuum furnace body, and between the fastening assembly and the vacuum furnace body.

5. The water-cooled electrode structure for a vacuum furnace according to claim 4, characterized in that: Both sides of the head of the insulating protective tube (21) are sealed with the vacuum furnace body through sealing rings and the shaft shoulders of the electrode body (1).

6. The water-cooled electrode structure for a vacuum furnace according to claim 4, characterized in that: The insulating ring (22) is located outside the insulating protective tube (21), and a gap is left between the insulating protective tube (21) and the electrode body (1).

7. The water-cooled electrode structure for a vacuum furnace according to claim 1, characterized in that: The fastening assembly comprises a pressure ring (4) and a locking nut (5); the pressure ring (4) and the locking nut (5) are sequentially sleeved on the electrode body (1), and the locking nut (5) is threadedly connected to the electrode body (1).

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