Welding device for preparing long copper-steel composite pipe rod by utilizing vacuum environment

Abstract

The utility model discloses a welding device for preparing a long copper-steel composite pipe rod by utilizing a vacuum environment, which relates to the technical field of metal composite rod processing and comprises a base pipe, a composite pipe and a pvc (polyvinyl chloride) pipe which are arranged at intervals from inside to outside and are coaxially arranged. Bases used for sealing the base pipe and the composite pipe so as to vacuumize a gap between the base pipe and the composite pipe are arranged at the tops and the bottoms of the base pipe and the composite pipe, and the bases are connected with the composite pipe in a welded mode; the utility model has the beneficial effects that the base is arranged, so that the base pipe and the composite pipe can be quickly fixed and positioned, and after the composite pipe is welded with the base, a sealed environment is formed between the composite pipe and the base pipe, so that vacuumizing is facilitated; air in the gaps is effectively emptied, the problem of local defects of the composite bar caused by the fact that an air layer is not emptied in the production process is avoided, and the high-quality and longer copper-steel composite bar can be prepared through the explosive welding device.

Description

Technical Field

[0001] The utility model relates to the technical field of metal composite rod processing, in particular to a welding device for preparing long copper-steel composite tube rods by utilizing a vacuum environment. Background Art

[0002] Bimetallic composite rods have the advantages of strong corrosion resistance, high strength, good plasticity, etc., due to the excellent performance of two metal materials. They are often used in energy, machinery, navigation and other fields. Explosive welding has the advantages of simple method, economical and applicable, strong bonding degree of metal composite materials produced by explosion, and no third phase generation. It is widely used in the production of various metal composite materials. Therefore, explosive welding has become an efficient method for the composite of bimetallic composite rods. The composite copper rods used more in production are multi-layer composite metal materials with titanium and its alloys, stainless steel, nickel and its alloys, copper and its alloys as the composite layer, copper rods as the base layer, and are composited or rolled by explosive welding. Among them, 316l stainless steel and copper T2 composite rods take into account the corrosion resistance of 316l stainless steel and the good conductor properties of copper, becoming a high-quality composite material.

[0003] At present, the traditional method of producing 316l stainless steel and copper T2 composite rods by hot rolling faces the characteristics of low bonding strength and poor electrical conductivity of composite rods, and its application in the field of precision end is limited. Traditional explosive welding can only produce composite rods of about 1 meter in length due to the influence of air between composite metals. For composite rods with longer lengths (i.e., more than 1 meter in length), explosive welding is adopted. Due to the failure to remove the air layer between the composite metals in time, a large area of ​​melting will occur at the bonding interface, and it is more likely that the base layer and the composite material cannot be combined at all, which limits the application of explosively welded copper-steel composite rods.

[0004] The utility model patent with the publication number CN219632812U discloses a metal composite rod explosion welding device, including a fixing plate, a positioning plate is fixedly mounted on the fixing plate through a support, and a gap is set between the fixing plate and the positioning plate; the positioning plate is clamped and installed in the medicine box, and a step-shaped card slot with an exhaust hole is opened on the positioning plate. The device exhausts the air in the gap of the composite metal by setting the exhaust hole, but if the composite rod is long, the problem of untimely exhaust of air is likely to occur, which affects the quality of the finished composite rod. Utility Model Content

[0005] The purpose of the utility model is to provide a welding device for preparing long copper-steel composite pipe rods in a vacuum environment in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A welding device for preparing long copper-steel composite pipe rods in a vacuum environment comprises a base pipe, a composite pipe and a PVC pipe which are arranged at intervals from the inside to the outside. The base pipe, the composite pipe and the PVC pipe are coaxially arranged. The top and bottom of the base pipe and the composite pipe are provided with a base for sealing the base pipe and the composite pipe so as to evacuate the gap between the base pipe and the composite pipe. The base is connected to the composite pipe by welding. A fixed support for positioning is provided between the composite pipe and the PVC pipe. Explosives are also filled between the composite pipe and the PVC pipe.

[0008] As a further improvement, the base tube is a copper rod, and the composite tube is a stainless steel tube.

[0009] As a further improvement, the gap distance between the base tube and the composite tube is 3 mm.

[0010] As a further improvement, the gap distance between the composite pipe and the PVC pipe is 31 mm.

[0011] As a further improvement, the base is provided with a circular hole for positioning the base pipe and an annular groove for positioning the composite pipe, the diameter of the circular hole is consistent with the diameter of the base pipe, and the gap distance of the annular groove is consistent with the wall thickness of the composite pipe.

[0012] As a further improvement, the base is a carbon steel base.

[0013] As a further improvement, the fixed support includes an annular positioning structure and positioning pieces evenly distributed on the outer side wall of the annular positioning structure.

[0014] As a further improvement, the explosive includes emulsion explosive and a detonator.

[0015] Compared with the prior art, the utility model has the beneficial effect that: the utility model can quickly fix and position the base tube and the composite tube by setting a base. After the composite tube is welded to the base, a sealed environment is formed between the composite tube and the base tube, which is convenient for vacuum extraction and effectively exhausts the air between the gaps, thereby avoiding the problem of local defects of the composite rod caused by the air layer not being exhausted during the production process. The explosive welding device can be used to prepare high-quality and longer copper-steel composite rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1The utility model is a schematic structural diagram of a welding device for preparing long copper-steel composite tubes and rods in a vacuum environment.

[0018] Figure 2 The utility model is a schematic structural diagram of a base of a welding device for preparing long copper-steel composite pipe rods in a vacuum environment.

[0019] Figure 3 It is a structural schematic diagram of a fixed support of a welding device for preparing long copper-steel composite pipes and rods in a vacuum environment according to the utility model.

[0020] Figure 4 It is a perspective view of a welding device for preparing long copper-steel composite pipes and rods in a vacuum environment according to the utility model.

[0021] The following are the descriptions of the reference numerals:

[0022] 1. Detonator; 2. Base; 3. Fixed support; 4. Copper rod; 5. Pipe gap; 6. Stainless steel pipe; 7. PVC pipe; 8. Explosives. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] The utility model is further described below in conjunction with the accompanying drawings:

[0026] like Figure 1-Figure 4 As shown, a welding device for preparing a long copper-steel composite pipe rod in a vacuum environment includes a base pipe, a composite pipe and a PVC pipe 7 arranged from the inside to the outside. In this embodiment, the base pipe is a copper rod 4, and the composite pipe is a stainless steel pipe 6, specifically a 316l stainless steel pipe 6. The copper rod 4, the stainless steel pipe 6 and the PVC pipe 7 are coaxially arranged to ensure that the gap between the copper rod 4 and the stainless steel pipe 6 and the gap between the stainless steel pipe 6 and the PVC pipe 7 are fixed, to ensure the quality of the finished composite pipe, and to ensure that the explosives 8 are evenly distributed around. In this embodiment, the distance of the pipe gap 5 between the copper rod 4 and the stainless steel pipe 6 is 3mm, and the distance of the gap between the stainless steel pipe 6 and the PVC pipe 7 is 31mm.

[0027] The top and bottom of the copper rod 4 and the stainless steel tube 6 are both provided with a base 2 for sealing the copper rod 4 and the stainless steel tube 6 so as to evacuate the gap between the copper rod 4 and the stainless steel tube 6. The base 2 and the stainless steel tube 6 are connected by welding. After the base 2 and the stainless steel tube 6 are welded, a sealed environment is formed between the copper rod 4 and the stainless steel tube 6, which is convenient for evacuating the vacuum.

[0028] The base 2 is provided with a circular hole for positioning the copper rod 4 and an annular groove for positioning the stainless steel tube 6. The diameter of the circular hole is consistent with the diameter of the copper rod 4, and the gap distance of the annular groove is consistent with the wall thickness of the stainless steel tube 6. In this embodiment, the base 2 is a carbon steel base 2.

[0029] A fixed support 3 for positioning is provided between the stainless steel pipe 6 and the PVC pipe 7. The fixed support 3 includes an annular positioning structure and positioning pieces evenly distributed on the outer wall of the annular positioning structure. The annular positioning structure has a circular hole. The inner diameter of the circular hole is the same as the diameter of the stainless steel pipe 6 to ensure that the stainless steel pipe 6 can be inserted into the circular hole. Two fixed supports 3 are provided;

[0030] Explosives 8 are also filled between the stainless steel tube 6 and the PVC tube 7 . The explosives 8 include emulsion explosives 8 and detonators 1 , wherein the detonators 1 are arranged at the top of the PVC tube 7 .

[0031] Working principle: When assembling the utility model, the copper rod 4 and the stainless steel tube 6 are installed on the bottom base 2 from the inside to the outside, leaving a gap between the copper rod 4 and the stainless steel tube 6, and then the top base 2 is installed on the top of the copper rod 4 and the stainless steel tube 6. After the two bases 2 are installed, the two bases 2 are welded to the stainless steel tube 6 by argon arc welding and vacuumized; after vacuumizing, the fixed support 3 is installed on the stainless steel tube 6, and the stainless steel tube 6 and the PVC tube 7 are fixed and positioned by the fixed support 3, and finally the explosive 8 is filled between the stainless steel tube 6 and the PVC tube 7 to obtain the explosive welding device.

[0032] 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 welding device for preparing long copper-steel composite pipes and rods in a vacuum environment, characterized in that: The invention comprises a base pipe, a composite pipe and a PVC pipe (7) which are arranged at intervals from the inside to the outside. The base pipe, the composite pipe and the PVC pipe (7) are coaxially arranged. The top and bottom of the base pipe and the composite pipe are provided with a base (2) for sealing the base pipe and the composite pipe so as to evacuate the gap between the base pipe and the composite pipe. The base (2) and the composite pipe are connected by welding. A fixed support (3) for positioning is provided between the composite pipe and the PVC pipe (7). Explosives (8) are also filled between the composite pipe and the PVC pipe (7).

2. The welding device for preparing long copper-steel composite pipes and rods in a vacuum environment according to claim 1, characterized in that: The base tube is a copper rod (4), and the composite tube is a stainless steel tube (6).

3. The welding device for preparing long copper-steel composite pipes and rods in a vacuum environment according to claim 1, characterized in that: The gap distance between the base tube and the composite tube is 3 mm.

4. The welding device for preparing long copper-steel composite pipes and rods in a vacuum environment according to claim 1, characterized in that: The gap distance between the composite pipe and the PVC pipe is 31mm.

5. The welding device for preparing long copper-steel composite pipes and rods in a vacuum environment according to claim 1, characterized in that: The base (2) is provided with a circular hole for positioning the base pipe and an annular groove for positioning the composite pipe. The diameter of the circular hole is consistent with the diameter of the base pipe, and the gap distance of the annular groove is consistent with the wall thickness of the composite pipe.

6. The welding device for preparing long copper-steel composite pipes and rods in a vacuum environment according to claim 5, characterized in that: The base (2) is a carbon steel base (2).

7. The welding device for preparing long copper-steel composite pipes and rods in a vacuum environment according to claim 1, characterized in that: The fixed support (3) comprises an annular positioning structure and positioning pieces evenly distributed on the outer side wall of the annular positioning structure.

8. The welding device for preparing long copper-steel composite pipes and rods in a vacuum environment according to claim 1, characterized in that: The explosive (8) comprises an emulsion explosive and a detonator (1).

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