Water-cooled cable joint insulation device in vacuum induction melting furnace

Abstract

The utility model provides a water-cooled cable joint insulation device in a vacuum induction melting furnace, which comprises a heat shrink tube, the heat shrink tube is sleeved outside the water-cooled cable, the end part of the water-cooled cable is provided with a nut, the two water-cooled cables are in butt joint through the nut, and the heat shrink tube is sleeved outside the water-cooled cable. The heat shrink tube sleeves the connecting part of the water-cooled cable and the nuts at the connecting part of the water-cooled cable after heat shrinkage, an insulating layer is wrapped outside the heat shrink tube, and explosion-proof mud is wrapped outside the insulating layer. The insulation device is low in implementation difficulty, good in insulation processing quality and high in stability, and provides quality guarantee for insulation manufacturing of the water-cooled cable in the vacuum induction furnace, so that stable operation of the whole set of equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of ingot furnaces, and particularly relates to an insulating device for a water-cooled cable joint in a vacuum induction melting furnace. Background Art

[0002] In a vacuum induction melting furnace, an induction crucible is placed in a vacuum chamber, and a water-cooled cable passes through the chamber wall of the vacuum chamber to connect the induction crucible with an external power supply.

[0003] Generally, the water-cooled cable inside the vacuum chamber is a complete one. During installation, one end of the water-cooled cable is connected to the vacuum induction melting furnace, and the other end of the water-cooled cable is connected to the water-cooled cable outside the vacuum chamber. Multiple water-cooled cables form a power supply circuit. During the production process, in the high-temperature and metal dust vacuum environment inside the vacuum chamber, it is extremely easy for an arc phenomenon of "vacuum breakdown" to occur between multiple water-cooled cables. Once the insulation at the joint of the water-cooled cable fails (is punctured), it will cause the furnace to stop, and even lead to safety accidents.

[0004] Therefore, an insulating device for a water-cooled cable joint in a vacuum induction melting furnace is needed to insulate the conductive exposed connection part at the joint of the water-cooled cable. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an insulating device for a water-cooled cable joint in a vacuum induction melting furnace, which can provide quality assurance for the insulation production of the water-cooled cable in the vacuum induction furnace, thus ensuring the stable operation of the whole set of equipment.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An insulating device for a water-cooled cable joint in a vacuum induction melting furnace includes a heat shrinkable tube. The heat shrinkable tube is sleeved outside the water-cooled cable. A nut is arranged at the end of the water-cooled cable. Two water-cooled cables are butted through the nut. After heat shrinking, the heat shrinkable tube sleeves the connection part of the water-cooled cables and the nut at the connection part of the water-cooled cables. An insulating layer is surrounded outside the heat shrinkable tube, and an explosion-proof mud is surrounded outside the insulating layer.

[0008] Further, in the above-mentioned insulating device for a water-cooled cable joint in a vacuum induction melting furnace, the insulating layer includes a glass fiber tape and an epoxy resin cold casting agent, and the epoxy resin cold casting agent covers the periphery of the glass fiber tape.

[0009] Further, in the above-mentioned insulating device for a water-cooled cable joint in a vacuum induction melting furnace, the thickness of the epoxy resin cold casting agent is 1 mm - 2 mm.

[0010] Further, in the above-mentioned insulating device for the water-cooled cable joint in the vacuum induction melting furnace, the insulating layer is provided with three layers, namely an inner insulating layer, a middle insulating layer and an outer insulating layer.

[0011] Further, in the above-mentioned insulating device for the water-cooled cable joint in the vacuum induction melting furnace, the fiberglass tape of the inner insulating layer is wound outside the heat shrinkable tube, and the overlapping width of each turn of the fiberglass tape is 1 / 2 of the tape width.

[0012] Further, in the above-mentioned insulating device for the water-cooled cable joint in the vacuum induction melting furnace, the fiberglass tape of the middle insulating layer is wound outside the epoxy resin cold casting agent of the inner insulating layer, and the overlapping width of each turn of the fiberglass tape is 1 / 2 of the tape width.

[0013] Further, in the above-mentioned insulating device for the water-cooled cable joint in the vacuum induction melting furnace, the fiberglass tape of the outer insulating layer is wound outside the epoxy resin cold casting agent of the middle insulating layer, and the overlapping width of each turn of the fiberglass tape is 1 / 2 of the tape width.

[0014] Further, in the above-mentioned insulating device for the water-cooled cable joint in the vacuum induction melting furnace, the heat shrinkable tube is a 10KV high-voltage heat shrinkable tube.

[0015] Analysis shows that the present utility model discloses an insulating device for a water-cooled cable joint in a vacuum induction melting furnace. This insulating device has low implementation difficulty, good insulation treatment quality and high stability, providing quality assurance for the insulation production of the water-cooled cable in the vacuum induction furnace, thus ensuring the stable operation of the entire set of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The schematic diagrams in the specification drawings that form a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. Among them:

[0017] Figure 1 is a schematic cross-sectional structure diagram of an embodiment of the present utility model.

[0018] Figure 2 is a schematic structure diagram of the butt joint of the water-cooled cable in an embodiment of the present utility model.

[0019] Figure 3 is a schematic structure diagram of the water-cooled cable sleeved with a heat shrinkable tube in an embodiment of the present utility model.

[0020] Explanation of the reference numerals in the drawings: 1 water-cooled cable; 2 heat shrinkable tube; 3 nut; 4 explosion-proof mud; 5 insulating layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present utility model rather than a limitation thereof. In fact, those skilled in the art will appreciate that modifications and variations can be made to the present utility model without departing from the scope or spirit thereof. For example, features shown or described as part of one embodiment can be used in another embodiment to yield yet another embodiment. Accordingly, it is desirable that the present utility model encompass such modifications and variations within the scope of the appended claims and their equivalents.

[0022] In the description of the present utility model, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing the present utility model rather than requiring the present utility model to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. The terms "connected", "connected to", and "disposed" used in the present utility model should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component; it can be a wired electrical connection, a radio connection, or a wireless communication signal connection. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] One or more examples of the present utility model are shown in the accompanying drawings. The detailed description uses numerical and alphabetical labels to refer to features in the drawings. Similar or like labels in the drawings and the description have been used to refer to similar or like parts of the present utility model. As used herein, terms such as "first", "second", and "third" can be used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of individual components.

[0024] As Figures 1 to 3 shown, according to an embodiment of the present utility model, there is provided an insulating device for a water-cooled cable joint inside a vacuum induction melting furnace, including a heat shrinkable tube 2. As Figure 3 shown, the heat shrinkable tube 2 is sleeved outside the water-cooled cable 1. A nut 3 is provided at the end of the water-cooled cable 1. As Figure 2 shown, two water-cooled cables 1 are butt-connected through the nut 3. After the heat shrinkable tube 2 is heat-shrunk, it sleeves the connection part of the water-cooled cables 1 and the nut 3 at the connection part of the water-cooled cables 1. An insulating layer 5 is surrounded outside the heat shrinkable tube 2, and an explosion-proof mud 4 is surrounded outside the insulating layer 5. This insulating device has a low implementation difficulty, good insulation treatment quality, and high stability, providing a quality guarantee for the insulation production of the water-cooled cable 1 inside the vacuum induction furnace, thereby ensuring the stable operation of the entire set of equipment.

[0025] Furthermore, the insulating layer 5 includes a glass fiber tape and an epoxy resin cold casting agent, and the epoxy resin cold casting agent covers the periphery of the glass fiber tape.

[0026] Furthermore, the thickness of the epoxy resin cold casting agent is 1 mm-2 mm, and such a setting can improve the insulation effect of the insulation device.

[0027] Furthermore, if Figure 1 As shown, the insulating layer 5 is provided with three layers, namely an inner insulating layer, a middle insulating layer and an outer insulating layer. Such a setting can ensure the insulation quality at the joint of the water-cooled cable 1.

[0028] Furthermore, the glass fiber tape of the inner insulating layer is wound around the outside of the heat shrink tube 2, and each turn of the glass fiber tape overlaps 1 / 2 of the width. The glass fiber tape of the middle insulating layer is wound around the outside of the epoxy resin cold casting agent of the inner insulating layer, and each turn of the glass fiber tape overlaps 1 / 2 of the width. The glass fiber tape of the outer insulating layer is wound around the outside of the epoxy resin cold casting agent of the middle insulating layer, and each turn of the glass fiber tape overlaps 1 / 2 of the width.

[0029] Furthermore, the heat shrink tube 2 is a 10KV high-voltage heat shrink tube 2 .

[0030] The implementation method of the insulation device comprises the following steps:

[0031] Step 1. Before installing the water-cooling cable 1, wipe the conical conductive surfaces on both sides of the water-cooling cable 1 with 0# sandpaper until the surface is smooth, and then wipe them clean with non-woven cloth dipped in alcohol.

[0032] Step 2, install the water-cooling cable 1, first put on a 10KV high-voltage heat shrink tube 2 of appropriate size, install the nut 3 of the water-cooling cable 1, and tighten the thread.

[0033] Step 3: After the water-cooling cable 1 is connected and fastened, and the water pressure test is conducted to ensure that there is no water leakage, the high-pressure heat shrink tube 2 is put on the joint of the water-cooling cable 1, and then the heat shrink tube 2 is blown with a hot air gun;

[0034] Step 4, use a layer of glass fiber tape to wrap, with each circle overlapping 1 / 2 of the width. During the wrapping process, the tape should be tightened with force and should not be sparse, until it is wrapped around both sides of the copper joint of the water-cooled cable 1, so that the connection of the water-cooled cable 1 and the nut 3 at the connection of the water-cooled cable 1 are both wrapped in the glass fiber tape.

[0035] Step 5, after winding is completed, evenly apply a layer of epoxy resin cold casting agent on the glass fiber tape to infiltrate and fill the glass fiber tape. The thickness of the epoxy resin cold casting agent on the periphery of the glass fiber tape is 1mm-2mm.

[0036] Step 6: After the epoxy resin cold casting agent is basically hardened and formed after 4 to 6 hours, repeat Steps 4 and 5 for a total of 3 times to form an inner insulation layer, a middle insulation layer, and an outer insulation layer.

[0037] Step 7: After Step 6 is completed, use explosion-proof insulating putty to wrap and cover the outer layer of the insulation layer 5 to form a solid protective layer.

[0038] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0039] An insulation device for a water-cooled cable joint in a vacuum induction melting furnace. The insulation device has low implementation difficulty, good insulation treatment quality, and high stability, providing quality assurance for the insulation production of the water-cooled cable 1 in the vacuum induction furnace, thereby ensuring the stable operation of the entire set of equipment.

[0040] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A water-cooled cable joint insulation device in a vacuum induction melting furnace, characterized in that: It includes a heat shrink tube, which is sleeved on the outside of the water-cooled cable. The ends of the water-cooling cables are provided with nuts, and the two water-cooling cables are butt-jointed through the nuts. After the heat shrink tube is shrunk, it covers the connection of the water-cooling cable and the nut of the connection of the water-cooling cable. An insulating layer is surrounded on the outside of the heat shrink tube. The insulating layer is surrounded by explosion-proof mud.

2. The water-cooled cable joint insulation device in a vacuum induction melting furnace according to claim 1, characterized in that: The insulating layer comprises a glass fiber tape and an epoxy resin cold casting agent, and the epoxy resin cold casting agent covers the periphery of the glass fiber tape.

3. The water-cooled cable joint insulation device in a vacuum induction melting furnace according to claim 2, characterized in that: The thickness of the epoxy resin cold casting agent is 1mm-2mm.

4. The water-cooled cable joint insulation device in a vacuum induction melting furnace according to claim 1, characterized in that: The insulating layer is provided with three layers, namely an inner insulating layer, a middle insulating layer and an outer insulating layer.

5. The water-cooled cable joint insulation device in a vacuum induction melting furnace according to claim 4, characterized in that: The glass fiber tape of the inner insulating layer is wound around the outside of the heat shrinkable tube, and each turn of the glass fiber tape overlaps 1 / 2 of the width.

6. The water-cooled cable joint insulation device in a vacuum induction melting furnace according to claim 4, characterized in that: The glass fiber tape of the middle insulating layer is wound around the outside of the epoxy resin cold casting agent of the inner insulating layer, and each circle of the glass fiber tape overlaps 1 / 2 of the width.

7. The water-cooled cable joint insulation device in a vacuum induction melting furnace according to claim 4, characterized in that: The glass fiber tape of the outer insulating layer is wound around the outside of the epoxy resin cold casting agent of the middle insulating layer, and each circle of the glass fiber tape overlaps 1 / 2 of the width.

8. The water-cooled cable joint insulation device in a vacuum induction melting furnace according to claim 1, characterized in that: The heat shrink tube is a 10KV high-voltage heat shrink tube.

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