Negative plate conductive beam

Abstract

The utility model discloses a conductive beam of a cathode plate, which relates to the technical field of conductive beams and comprises a copper rod, and outer wave-shaped curved surfaces for increasing the contact area are uniformly distributed on the outer surface of the copper rod; the stainless steel pipe wraps the outer surface of the copper bar, an inner wavy curved surface matched with the outer wavy curved surface is arranged on the inner side wall of the stainless steel pipe, and the length of the stainless steel pipe is consistent with that of the copper bar; sealing plates for sealing the copper rod are arranged at the two ends of the copper rod and are welded with the stainless steel pipe; the two ends of the stainless steel pipe are provided with copper end connectors used for exposing copper rods. The utility model has the beneficial effects that by arranging the wave-shaped structures on the copper rod and the stainless steel pipe, after the copper rod and the stainless steel pipe are compounded, the bonding surface is larger, the mutual penetration effect of the copper rod and the stainless steel pipe is better, the bonding strength is high, the shearing strength reaches 285N / mm < 2 >, the resistance of the bonding surface is small, and the current efficiency can reach more than 98%.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive beams, in particular to a cathode plate conductive beam. Background Art

[0002] Traditional stainless steel cathode plate conductive beams are generally steel-clad copper or titanium-clad copper. When producing such cathode plate conductive beams, simply place a copper rod into a steel tube (or titanium tube), then heat it to 800-900°C, and then combine the copper rod and the stainless steel tube (or titanium tube) through a rolling machine. The produced stainless steel cathode plate conductive beam, on the one hand, has a low copper-steel bonding strength after simple hot rolling, and copper-steel composite cracking occurs during use, making the conductive beam scrapped. On the other hand, due to the low copper-steel bonding rate, the bonding interface resistance is large, the conductivity is poor, and the current efficiency is generally below 95%. Although the method of making conductive beams by traditional hot rolling is simple, the finished product faces the disadvantages of low bonding strength, low current efficiency, and short service life, which increases the cost in the actual production process.

[0003] The utility model patent with publication number CN220767200U discloses a composite titanium anode plate conductive beam. This solution prepares the conductive beam by extrusion, and uses a stamping process to press out indentations at the center of the front and back sides of the titanium tube, further allowing the titanium tube and the copper rod to be tightly wrapped, so that the finished conductive beam has a strong bearing capacity, and the bonding interface resistance between the copper rod and the titanium tube is small, and the conductivity is good. This solution uses a stamping method to press out indentations at the center of the front and back sides of the titanium tube, and the indentations improve the bonding strength between the titanium tube and the copper rod, but there are also certain limitations. Although the bonding strength of the conductive beam is improved at the location where the indentation is pressed, the bonding strength of other locations does not change significantly, and the overall bonding strength of the conductive beam is uneven. Utility Model Content

[0004] The purpose of the utility model is to provide a cathode plate conductive beam in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A cathode plate conductive beam, comprising:

[0007] A copper rod, the outer surface of which is uniformly provided with an outer wavy curved surface for increasing the contact area;

[0008] A stainless steel tube is coated on the outer surface of the copper rod, an inner wavy curved surface matching the outer wavy curved surface is provided on the inner wall of the stainless steel tube, and the length of the stainless steel tube is consistent with the length of the copper rod;

[0009] Sealing plates for sealing the copper rod are provided at both ends of the copper rod, and the sealing plates are welded to the stainless steel tube; copper end interfaces for exposing the copper rod are opened at both ends of the stainless steel tube.

[0010] As a further improvement, the wall thickness of the stainless steel tube is 3-5 mm.

[0011] As a further improvement, the stainless steel tube is a 304 stainless steel tube or a 316l stainless steel tube.

[0012] As a further improvement, the copper rod and the stainless steel pipe are composited by explosion welding.

[0013] As a further improvement, the copper end interface has a length of 100-150 mm, a width of 20-25 mm, and a height of 15-20 mm.

[0014] As a further improvement, the copper rod is a red copper rod.

[0015] As a further improvement, the stainless steel tube is provided with reinforcing ribs, which are arranged along the axial direction of the stainless steel tube.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model sets a wavy structure on the copper rod and the stainless steel tube. After the copper rod and the stainless steel tube are compounded, the bonding surface is larger, the mutual penetration effect between the copper rod and the stainless steel tube is better, the bonding strength is high, and the shear strength reaches 285N / mm 2 , the combined surface resistance is small and the current efficiency can reach more than 98%.

[0018] 2. Seal the copper rod by welding sealing plates at both ends of the stainless steel tube and mill out the copper end interface of the required size. This can reduce the contact area between the copper rod and the air and reduce oxidation and corrosion of the copper rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a structural schematic diagram of the cathode plate conductive beam described in the utility model.

[0021] Figure 2 It is a cross-sectional view of the cathode plate conductive beam described in the utility model.

[0022] Figure 3 It is a structural schematic diagram of the raw material described in the utility model.

[0023] Figure 4 It is a structural schematic diagram of the explosive device described in the utility model.

[0024] The following are the descriptions of the reference numerals:

[0025] 1. Copper rod; 11. External wavy surface; 2. Stainless steel tube; 21. Internal wavy surface; 3. Copper end interface; 4. Sealing plate; 5. Reinforcement ribs; 6. Explosive device. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] like Figure 1-Figure 3 As shown, the cathode plate conductive beam includes a copper rod 1 and a stainless steel tube 2 coated on the outer surface of the copper rod 1. In this embodiment, the copper rod 1 is a red copper rod, the stainless steel tube 2 is a 316l stainless steel tube, and the tube wall thickness of the stainless steel tube 2 is 3-5 mm.

[0030] A copper rod 1, the outer surface of which is uniformly provided with an outer wavy curved surface 11 for increasing the contact area;

[0031] The stainless steel tube 2 is coated on the outer surface of the copper rod 1. The inner wall of the stainless steel tube 2 is provided with an inner wavy surface 21 matching the outer wavy surface 11. The length of the stainless steel tube 2 is consistent with the length of the copper rod 1.

[0032] The wave fluctuation amplitude of the outer wavy curved surface 11 and the inner wavy curved surface 21 is about 1 mm to avoid affecting the quality of the finished conductive beam.

[0033] Both ends of the copper rod 1 are provided with sealing plates 4 for sealing the copper rod 1, and the sealing plates 4 are welded to the stainless steel tube 2; both ends of the stainless steel tube 2 are provided with copper end interfaces 3 for exposing the copper rod 1, and the copper end interfaces 3 are 100 mm in length, 20 mm in width, and 15 mm in height.

[0034] In this embodiment, the stainless steel tube 2 is provided with reinforcing ribs 5 , which are arranged along the axial direction of the stainless steel tube 2 . The reinforcing ribs 5 are used to improve the stability of the conductive beam and reduce deformation.

[0035] In this embodiment, the preparation of the cathode plate conductive beam combines explosive welding and rolling, and specifically includes the following steps:

[0036] (1) Assemble the explosive device 6. Place a copper rod 1 with a diameter of 30 mm into a 316L stainless steel tube 2 with a wall thickness of 3 mm. Fix the copper rod 1, the stainless steel tube 2 and the PVC tube coaxially through a base and a fixed support. Introduce explosives to form the explosive device. Figure 3 Shown

[0037] (2) detonating an explosive device to obtain a copper-steel composite tube;

[0038] (3) placing the copper-steel composite rod obtained by explosion welding in an electric heating furnace and heating it to 550° C., keeping the temperature for 2 hours, and then annealing it by furnace cooling;

[0039] (4) rolling the copper-steel composite rod to a desired size using a rolling mill by means of six-pass rolling;

[0040] (5) straightening the rolled copper-steel composite rod by a straightening machine;

[0041] (6) Using argon arc welding to seal the two ends of the copper-steel composite rod with a circular sealing plate 4, the sealing plate 4 is 316l stainless steel;

[0042] (7) A copper end interface 3 with a length of 100 mm, a width of 20 mm, and a height of 15 mm is milled out at each end of the copper-steel composite rod to obtain a cathode plate conductive beam.

[0043] In the prior art, the conductive beam is made by the rolling process, and the raw materials need to be heated to 800-900°C and then rolled to ensure that the copper and steel can be well combined. However, the high-temperature heated copper embryo will produce some toxic substances, which will harm the health of the production workers. In this embodiment, the explosive welding and rolling processes are combined to reduce the required heating temperature and ensure the health of the workers. The explosive welding and rolling processes are combined with the wavy contact surface to greatly improve the bonding strength of the conductive beam.

[0044] After explosive welding, a wavy structure will appear on the contact surface of the copper rod and the stainless steel tube. The utility model increases the contact area between the copper rod and the stainless steel tube by processing a wavy surface on the outer surface of the copper rod and the inner wall of the stainless steel tube, and increases the number of wavy structures, thereby improving the bonding strength. Correspondingly, pre-processing the raw material into a wavy surface will increase a certain cost, and the combination of explosive welding and rolling technology will result in a relatively higher production cost of the utility model, so it is more suitable for use in some high-end equipment or in situations where high product quality requirements are required.

[0045] Working principle: The outer surface of the copper rod 1 is uniformly distributed with an outer wavy surface 11, and the inner wall of the stainless steel tube 2 is provided with an inner wavy surface 21 that matches the outer wavy surface 11. When the copper rod 1 and the stainless steel tube 2 are explosively welded, the contact area between the copper rod 1 and the stainless steel tube 2 is larger, the mutual penetration effect is better, the bonding strength is improved, the bonding surface resistance is small, and the current efficiency is improved. Sealing plates 4 are welded at both ends of the finished conductive beam to reduce the exposed area of ​​the copper rod 1 and avoid oxidation and corrosion of the non-working surface of the copper rod 1, which affects the performance of the conductive beam.

[0046] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements shall fall within the scope of the utility model to be protected.

Claims

1. A cathode plate conductive beam, characterized in that: include: A copper rod (1), the outer surface of the copper rod (1) being uniformly distributed with an outer wavy curved surface (11) for increasing the contact area; A stainless steel tube (2) is coated on the outer surface of the copper rod (1), an inner wavy curved surface (21) matching the outer wavy curved surface (11) is provided on the inner side wall of the stainless steel tube (2), and the length of the stainless steel tube (2) is consistent with the length of the copper rod (1); Sealing plates (4) for sealing the copper rod (1) are provided at both ends of the copper rod (1), and the sealing plates (4) are welded to the stainless steel tube (2); copper end interfaces (3) for exposing the copper rod (1) are provided at both ends of the stainless steel tube (2).

2. The cathode plate conductive beam according to claim 1, characterized in that: The wall thickness of the stainless steel tube (2) is 3-5 mm.

3. The cathode plate conductive beam according to claim 2, characterized in that: The stainless steel tube (2) is a 304 stainless steel tube (2) or a 3161 stainless steel tube (2).

4. The cathode plate conductive beam according to claim 1, characterized in that: The copper rod (1) and the stainless steel pipe (2) are composited by explosion welding.

5. The cathode plate conductive beam according to claim 1, characterized in that: The copper end interface (3) has a length of 100-150 mm, a width of 20-25 mm, and a height of 15-20 mm.

6. The cathode plate conductive beam according to claim 1, characterized in that: The copper rod (1) is a red copper rod (1).

7. The cathode plate conductive beam according to claim 1, characterized in that: The stainless steel pipe (2) is provided with reinforcing ribs (5), and the reinforcing ribs (5) are arranged along the axial direction of the stainless steel pipe (2).

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