Melting device for welding flux of intermediate joint of cable

Abstract

The utility model discloses a melting device for welding flux of a cable intermediate joint, which comprises a crucible for accommodating the welding flux, a discharge port at the inner bottom of the crucible is arranged to be a diversion conical port which is closed down downwards, a plug is arranged in the diversion conical port, the plug and the welding flux are both made of metal conductive materials, and the lower end of the diversion conical port is connected with the crucible. And the melting point of the plug is higher than that of the solder. The plug with the melting point higher than that of welding flux is additionally arranged at the discharge port of the crucible, so that the size of the welding flux is not limited by conditions, and on-site material taking can be completely achieved, namely, copper materials are directly cut out from a cable head and thrown into the welding flux cavity to serve as the welding flux, the welding flux material taking conditions are widened, material taking can be achieved, the flexibility is improved, and the welding efficiency is improved. And the virtual connection problem is effectively avoided, and the welding qualification rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable joint welding, in particular to a melting device for welding material of a cable intermediate joint. Background Art

[0002] In the prior art, the process of heating and liquefying the solder in the melt chamber all adopts a chemical method, that is, a method of rapid heating by explosive combustion of heating powder such as gunpowder (there are many Douyin videos of this method), that is, solder and gunpowder are put into the melt chamber together, the gunpowder is ignited and explosively heated rapidly to liquefy the solder. Most of the solders are made of pure copper, the same material as the core conductor of the power cable.

[0003] The patent number is ZL202110665789.2 and is named "Welding Process for Cable Heads". When using the welding device, first insert the two cable heads into the welding cavity from both ends of the welding cavity and keep a certain distance. Use a fixing component to fix the position of the cable head. Then, place the copper powder added with heating powder in the melting tank, ignite the heating powder, and the copper powder quickly burns and melts into liquid. The high temperature causes the copper baffle to melt, exposing the connecting hole, and the copper liquid flows into the welding cavity.

[0004] This technology has the following disadvantages: (1) Since the melting temperature of the copper baffle is the same as that of the copper cable, after the copper baffle is melted, the molten copper is immediately introduced into the welding chamber. At this time, the temperature of the molten copper is not much higher than that of the copper cable. In addition, when the chemical fuel reaction is not sufficient, the copper powder and copper sheet are not melted thoroughly, and the cable joint is not preheated sufficiently, it will cause a virtual connection at the welding part, resulting in unqualified welding.

[0005] (2) The selection of solder materials has limitations. It must be copper powder, that is, its particle size is smaller than the thickness of the copper baffle, so that it can be melted slower than the copper baffle and fully melted. However, in actual applications, the storage conditions of high-purity copper powder are relatively harsh. Therefore, in order to obtain the convenience of solder, it is possible to obtain materials on site, that is, directly cut the copper material from the cable head and throw it into the solder cavity as solder. In this way, the solder has not yet melted, and the copper baffle has opened the feed port. Small pieces of solder that have not been completely melted also enter the welding cavity, resulting in loose welding parts, poor conductivity and high resistivity. Utility Model Content

[0006] The purpose of the utility model is to overcome the above defects of the prior art and provide a power cable intermediate joint welding device which has loose solder material acquisition conditions, can obtain materials locally to improve flexibility, improve welding efficiency, effectively avoid the problem of false connection, and improve the welding qualification rate.

[0007] To achieve the above object, the utility model is realized through the following technical solutions: A melting device for the solder of a cable intermediate joint, characterized in that it includes a crucible for receiving the solder. The discharge port at the inner bottom of the crucible is set as a downward-converging diversion cone opening. A plug is arranged in the diversion cone opening. Both the plug and the solder are made of metal conductive materials, and the melting point of the plug is higher than that of the solder.

[0008] The utility model adds a plug with a melting point higher than that of the solder at the discharge port of the crucible (for example, the melting point of copper is 1083 degrees Celsius, so the plug is selected with a melting point higher than that of copper, such as iron at 1538 degrees Celsius, nickel at 1455 degrees Celsius, or titanium alloy at 1668 degrees Celsius. The larger the cable diameter, the higher the melting point of the plug selected to ensure that the copper water has a high enough temperature to weld the cable head after reaching the welding cavity). Only after the plug melts will the discharge port open normally and the solder can flow down. Then, even if some heat is lost on the way, the temperature when it reaches the mold is high enough to melt the two cable heads, so it can preheat and melt the cable joint well, thus enabling the solder and the cable joint to be better combined together, effectively avoiding the problem of virtual connection and improving the welding qualification rate.

[0009] The utility model adds a plug with a melting point higher than that of the solder at the discharge port of the crucible, so that the size of the solder is not restricted by conditions. Therefore, it is completely possible to obtain materials on-site, that is, directly cut copper materials from the cable head and throw them into the solder cavity to act as solder, which relaxes the conditions for obtaining solder materials, improves the flexibility of obtaining materials, and enhances the welding efficiency.

[0010] Preferably, the plug has a circular sheet structure. The circular sheet plug is similar to a coin.

[0011] Preferably, the side edge of the circular sheet structure plug is provided with a chamfer. The side edge of the circular sheet plug has a chamfer, which can fit well with the diversion cone opening.

[0012] Preferably, the plug has a pot-shaped structure. Due to the large specific gravity of the concave part structure of the pot-shaped plug, it will naturally move downward under gravity, thus perfectly covering the diversion cone opening.

[0013] Preferably, the plug has a spherical structure. The spherical plug is not restricted by the angle. Just throw it into the crucible at will, and it can perfectly cover the diversion cone opening.

[0014] Preferably, a heat preservation cup is sleeved outside the crucible. A material passing opening allowing the diversion cone opening to extend out is provided at the center of the inner bottom of the heat preservation cup. The heat preservation cup can prevent the crucible from losing temperature too quickly, and can also play a role in heat collection during the heating of the crucible. In addition, it does not affect heating because for electromagnetic induction heating, it can directly avoid heating it and heat the inside.

[0015] Preferably, the crucible is specifically a graphite crucible, and the heat preservation cup is specifically a quartz cup.

[0016] Beneficial effects: (1) The present utility model adds a plug with a melting point higher than that of the solder at the discharge port of the crucible. Only after the plug melts can the discharge port be normally opened and the solder can flow down. Even if some heat is lost on the way, the temperature of the solder reaching the mold is high enough to melt the two cable ends, so that the cable joints can be preheated and melted well, thus enabling the solder and the cable joints to be better combined together, effectively avoiding the problem of virtual connection and improving the welding qualification rate.

[0017] (2) The present utility model adds a plug with a melting point higher than that of the solder at the discharge port of the crucible, so that the size of the solder is not restricted. Therefore, it is completely possible to obtain materials on site, that is, directly cut copper materials from the cable head and throw them into the solder cavity to act as solder, which relaxes the conditions for obtaining solder materials, improves the flexibility of obtaining materials, and enhances the fusion efficiency. Description of the drawings

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a schematic structural diagram of a plug of the present utility model;

[0020] Figure 3 is another structural cross-sectional view of a plug of the present utility model;

[0021] Figure 4 is still another schematic structural diagram of a plug of the present utility model.

[0022] In the figure: 1 - crucible, 2 - diversion cone opening, 3 - heat preservation cup, 4 - material passing opening, 5 - solder, 6 - plug, 61 - disc-shaped plug, 62 - pot-shaped plug, 63 - spherical plug, 611 - chamfer. Detailed implementation manners

[0023] In order to make the technical means, creative features and achieved purposes of the present utility model easy to understand, the present utility model is further described below in conjunction with specific embodiments.

[0024] Embodiment 1: As shown in Figure 1 and Figure 2 , a melting device for solder of a cable intermediate joint includes a crucible 1 for storing the solder 5. The discharge port at the inner bottom of the crucible 1 is provided with a downwardly converging diversion cone opening 2. A heat preservation cup 3 is sleeved outside the crucible 1, and a material passing opening 4 allowing the diversion cone opening to extend is provided at the center of the inner bottom of the heat preservation cup 3.

[0025] As shown in Figure 2As shown, a plug 6 is arranged in the diversion cone opening 2. Both the plug 6 and the solder 5 are made of metal conductive materials (which can be iron, nickel, titanium alloy, etc.), and the melting point of the plug 6 is higher than that of the solder 5. The plug 6 has a disc-shaped structure. A chamfer 611 is provided on the side edge of the disc-shaped plug 61.

[0026] The crucible 1 is specifically a graphite crucible, and the heat-insulating cup 3 is specifically a quartz cup.

[0027] Example 2: As Figure 3 shown, the plug 6 has a pot-shaped structure, specifically a pot-shaped plug 62.

[0028] The rest is the same as that of Example 1.

[0029] Example 3: As Figure 4 shown, the plug 6 has a spherical structure, specifically a spherical plug 63.

[0030] The rest is the same as that of Example 1.

[0031] The utility model adds a plug with a melting point higher than that of the solder at the discharge port of the crucible. Only after the plug melts can the discharge port be normally opened and the solder can go down. Then, even if some heat is lost on the way, the temperature of the solder reaching the mold is high enough to melt the two cable heads, so that the cable joints can be preheated and melted well, and thus the solder and the cable joints can be better combined together, effectively avoiding the problem of virtual connection and improving the welding qualification rate.

[0032] The utility model adds a plug with a melting point higher than that of the solder at the discharge port of the crucible, so that the size of the solder is not restricted. Therefore, it is completely possible to obtain materials on-site, that is, directly cut copper materials from the cable head and throw them into the solder cavity to act as solder, which relaxes the solder material obtaining conditions, improves the flexibility of obtaining materials, and enhances the fusion efficiency.

Claims

1. A melting device for soldering cable intermediate joints, characterized in that: It comprises a crucible for accommodating solder, wherein the inner bottom discharge port of the crucible is configured as a downwardly closing guide cone, wherein a plug is disposed in the guide cone, wherein the plug and the solder are both made of conductive metal material, and the melting point of the plug is higher than the melting point of the solder.

2. The melting device for the cable intermediate joint solder according to claim 1, characterized in that: The plug is in a disc-shaped structure.

3. The melting device for the cable intermediate joint solder according to claim 2, characterized in that: The side edges of the plug of the disc-shaped structure are provided with chamfers.

4. The melting device for the cable intermediate joint solder according to claim 1, characterized in that: The plug is in a pot-shaped structure.

5. The melting device for the cable intermediate joint solder according to claim 1, characterized in that: The plug is in a spherical structure.

6. The melting device for the cable intermediate joint solder according to claim 1, 2, 3, 4 or 5, characterized in that: The outer shell of the crucible is provided with a thermos cup, and the center of the inner bottom of the thermos cup is provided with a material passing port for allowing the guide cone to extend out.

7. The melting device for the cable intermediate joint solder according to claim 6, characterized in that: The crucible is specifically a graphite crucible, and the thermos cup is specifically a quartz cup.

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