Copper and stainless steel composite conducting rod prepared by explosive welding process

Abstract

The invention relates to the technical field of vacuum arc extinguish chambers, and discloses a copper stainless steel composite conducting rod prepared by an explosive welding process, the copper stainless steel composite conducting rod comprises an outer shell, the inner part of the outer shell is cooperatively provided with a static cover plate, and the top of the static cover plate is connected with a copper stainless steel composite conducting rod main body prepared by the explosive welding process; when the device is used, the mechanical strength of the inner material and the outer material is mutually enhanced, the requirements of high conductivity and high mechanical strength are met, the conducting rod is processed at one time, acid pickling is performed, assembly is simple in production, welding reliability is high, and the service life of the vacuum arc-extinguishing chamber can be prolonged; the device is provided with a stabilizing device, and protection of the outer side of the copper stainless steel composite conducting rod body prepared through the explosive welding technology is improved on the premise that normal use of the copper stainless steel composite conducting rod body prepared through the explosive welding technology is not affected; the device is provided with the protection device, the outer side of the copper stainless steel composite conducting rod body prepared through the explosive welding process is protected through the first insulation reinforcing sleeve and the second insulation reinforcing sleeve, and the service life of the device is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum arc extinguishing chambers, in particular to a copper-stainless steel composite conductive rod prepared by an explosive welding process. Background Art

[0002] Vacuum interrupters, also known as vacuum switch tubes, are core components of medium- and high-voltage power switches. Their primary function is to rapidly extinguish arcs and suppress current flow in medium- and high-voltage circuits after power is disconnected, using the excellent insulation properties of the vacuum within the tube to prevent accidents and incidents. Primarily used in power transmission and distribution control systems, they offer energy and material conservation, fire and explosion resistance, compact size, long lifespan, low maintenance, reliable operation, and zero pollution. Vacuum interrupters are categorized by their intended use as circuit breakers and load switch interrupters. Circuit breaker interrupters are primarily used in substations and power grid facilities within the power sector, while load switch interrupters are primarily used by end users of the power grid. As the core component of vacuum switches, vacuum interrupters are widely used in the power industry due to their strong interrupting capability, long lifespan, maintenance-free operation, and environmental friendliness. Vacuum switches with voltage levels of 40.5kV and below now cover nearly the entire power distribution sector. Vacuum switches with voltage levels of 72.5kV and above have become an effective alternative to SF6 gas switches. 126kV and 252kV single-break vacuum interrupters have the characteristics of large rated current and fast opening and closing speed, requiring their conductive rods to meet the requirements of high conductivity and high mechanical strength.

[0003] However, during the use of existing conductive rods and vacuum arc chambers, conventional conductive rods use a single oxygen-free copper material, which has defects such as severe roughening and severe indentation, and the mechanical strength is far from meeting the requirements; due to the existence of the skin effect, when there is alternating current or an alternating electromagnetic field, the current is concentrated on the "skin" part of the conductive rod, that is, the thin layer on the surface of the conductor, and the closer to the surface of the conductor, the greater the current density. Therefore, the currently commonly used structure is a split structure with an oxygen-free copper tube wrapped around the outside of a stainless steel core. Because the stainless steel core and the oxygen-free copper tube correspond to two separate parts, they need to be processed separately during the production process, and degreased and pickled according to the process of parts of different materials. The later assembly is complicated and the welding quality is unstable. In actual use, there will be problems such as the stainless steel core desoldering and the exposed part of the stainless steel core being easily broken by shear force. Therefore, those skilled in the art provide a copper-stainless steel composite conductive rod prepared by an explosive welding process to solve the problems raised in the above background technology. Summary of the Invention

[0004] The object of the present invention is to provide a copper-stainless steel composite conductive rod prepared by an explosive welding process to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A copper-stainless-steel composite conductive rod prepared by an explosive welding process comprises an outer shell, a static cover plate is cooperatively installed inside the outer shell, a copper-stainless-steel composite conductive rod body prepared by the explosive welding process is connected to the top of the static cover plate, a stabilizing device is provided on the outside of the copper-stainless-steel composite conductive rod body prepared by the explosive welding process, a protective device is provided on the outside of the copper-stainless-steel composite conductive rod body prepared by the explosive welding process, a bellows shield is connected to the top of the copper-stainless-steel composite conductive rod body prepared by the explosive welding process, a bellows body is installed on the top of the bellows shield, a guide sleeve is fixed to the top of the bellows body, a dynamic conductive rod is fixed to the top of the guide sleeve, and a dynamic cover plate is fixed to the top of the outer shell;

[0007] The method for preparing a copper-stainless steel composite conductive rod prepared by an explosive welding process comprises the following steps:

[0008] S1. Material preparation

[0009] Copper tube: Choose high-purity copper tube (such as TU0 / TU1 oxygen-free copper, etc.) to ensure it has good electrical conductivity, thermal conductivity and plasticity;

[0010] Stainless steel rod: Choose austenitic stainless steel (such as 304, 316 or 304L, 316L, etc.) to ensure it has high strength, corrosion resistance and good mechanical properties;

[0011] Explosives: Choose explosives with moderate detonation velocity and uniform energy distribution (such as ammonium nitrate mixed explosives);

[0012] S2. Process the copper tube and stainless steel rod according to the predetermined size and shape and polish the surface (roughness 0.4 μm);

[0013] S3. Assemble the copper tube, stainless steel rod and explosives through the base, cartridge, steel mandrel and other molds;

[0014] Put the copper tube on the stainless steel rod, and keep a certain gap between the two (usually 1-10mm, the gap size varies with the thickness of the copper tube);

[0015] A layer of explosives is evenly laid on the outer surface of the copper tube. The thickness and distribution of the explosives must be precisely controlled to ensure uniform transfer of the explosive energy.

[0016] The stabilizing device includes an insulating protective sleeve, the outer side of the insulating protective sleeve is rotatably connected to an insulating connecting sleeve via a rotating shaft, the outer side of the insulating protective sleeve is fixed with an insulating assembly plate, the outer side of the insulating connecting sleeve is fixed with an insulating assembly pad, the outer side of the insulating assembly plate is fixed with a first insulating block, the outer side of the insulating assembly pad is fixed with a second insulating block, an insulating positioning threaded rod is fixed on the side of the second insulating block close to the first insulating block, a limiting pad is fixed to one end of the insulating positioning threaded rod, an insulating gasket is movably sleeved on the outer side of the insulating positioning threaded rod, and the outer side of the insulating positioning threaded rod is threadedly connected to an insulating threaded sleeve.

[0017] As a further solution of the present invention: the outer layer of the copper-stainless steel composite conductive rod body prepared by the explosive welding process is oxygen-free copper material for conduction, and the inner core of the copper-stainless steel composite conductive rod body prepared by the explosive welding process is high-strength steel.

[0018] As a further solution of the present invention: the inner core of the copper-stainless steel composite conductive rod body prepared by the explosive welding process is made of stainless steel, and the outer layer of oxygen-free copper material of the copper-stainless steel composite conductive rod body prepared by the explosive welding process is composited with the internal steel core by explosive welding technology.

[0019] As a further solution of the present invention: the oxygen-free copper outer surface of the copper-stainless steel composite conductive rod body prepared by the explosive welding process is processed with the required brazing structure, and the internal steel core of the copper-stainless steel composite conductive rod body prepared by the explosive welding process is processed with internal and external threads.

[0020] As a further solution of the present invention: a limiting groove is provided on the outer side of the first insulating block, and the size of the limiting groove is adapted to the diameter of the insulating positioning threaded rod.

[0021] As a further solution of the present invention: the insulating protective sleeve is fixedly connected to the copper-stainless steel composite conductive rod body prepared by the explosion welding process, and the insulating assembly plate is adhesively fixed to the insulating protective sleeve.

[0022] As a further solution of the present invention: the protective device includes a first insulating reinforcement sleeve, the outer side of the first insulating reinforcement sleeve is rotatably connected to a second insulating reinforcement sleeve via a rotating shaft, the outer side of the first insulating reinforcement sleeve is fixed with a first insulating plate, the outer side of the second insulating reinforcement sleeve is fixed with a second insulating plate, the outer side of the first insulating plate is fixed with a first insulating pad, the outer side of the first insulating pad is fixed with a first insulating semi-threaded rod, the outer side of the second insulating plate is fixed with a second insulating pad, and the outer side of the second insulating pad is fixed with a second insulating semi-threaded rod.

[0023] As a further solution of the present invention: the outer sides of the first insulating semi-threaded rod and the second insulating semi-threaded rod are threadedly connected with insulating nuts, the interiors of the first insulating reinforcement sleeve and the second insulating reinforcement sleeve are embedded and fixed with a support shell, an insulating connection pad is fixed to the inner wall of one side of the support shell, one side of the insulating connection pad is connected to a support spring, and the end of the support spring away from the insulating connection pad is connected to a support pad.

[0024] As a further solution of the present invention: a reinforcing insulating column is fixed to one side of the support pad and passes through the other side thereof, and a limiting shell is fixed to the outer side of the support shell.

[0025] As a further solution of the present invention: the limiting shell is embedded and fixed inside the first insulating reinforcement sleeve and the second insulating reinforcement sleeve, and the first insulating reinforcement sleeve is fixedly connected to the copper-stainless steel composite conductive rod body prepared by the explosion welding process.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. When the device is in use, oxygen-free copper and stainless steel and other high-strength metal materials are compounded to form an integral conductive rod. The mechanical strength of the two materials inside and outside reinforce each other, meeting the requirements of high conductivity and high mechanical strength. The conductive rod is processed and pickled in one go, which makes assembly simple and the welding reliability high. It can effectively solve the problem of stainless steel core desoldering or breaking in the current structure during use, and can also extend the service life of the vacuum interrupter.

[0028] 2. The device is provided with a stabilizing device, and the insulating protective sleeve is fixedly connected to the main body of the copper-stainless-steel composite conductive rod prepared by the explosive welding process. The outer side of the main body of the copper-stainless-steel composite conductive rod prepared by the explosive welding process is supported and reinforced by the insulating connecting sleeve and the insulating protective sleeve. Under the premise of not affecting the normal use of the main body of the copper-stainless-steel composite conductive rod prepared by the explosive welding process, the protection of the outer side of the main body of the copper-stainless-steel composite conductive rod prepared by the explosive welding process is improved;

[0029] 3. The device is provided with a protective device. The first insulating reinforcement sleeve is fixed on the outside of the copper-stainless-steel composite conductive rod body prepared by the explosive welding process. The first insulating reinforcement sleeve and the second insulating reinforcement sleeve protect the outside of the copper-stainless-steel composite conductive rod body prepared by the explosive welding process, which will not affect the normal use of the copper-stainless-steel composite conductive rod body prepared by the explosive welding process, and help to improve the service life of the device.

[0030] 4. The copper-stainless-steel conductive rod prepared by the preparation method of the copper-stainless-steel composite rod in which copper liquid is poured onto the outside of the stainless-steel support rod has a conductivity of only 36-37MS / m due to the copper being a cast structure. The copper-stainless-steel conductive rod prepared in this application has a conductivity of ≥55MS / m and a bonding layer strength of ≥140Mpa, with high conductivity and bonding strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the overall structure of a copper-stainless steel composite conductive rod prepared by an explosive welding process;

[0032] Figure 2 A schematic diagram of the overall structure of a copper-stainless steel composite conductive rod prepared by an explosive welding process;

[0033] Figure 3 A schematic diagram of the internal structure of a copper-stainless steel composite conductive rod prepared by an explosive welding process;

[0034] Figure 4 A schematic diagram of the structure of a stabilizing device in a copper-stainless steel composite conductive rod prepared by an explosive welding process;

[0035] Figure 5 A copper-stainless steel composite conductive rod prepared by an explosive welding process Figure 4 Schematic diagram of the enlarged structure of area A;

[0036] Figure 6 A schematic diagram of the structure of a protective device in a copper-stainless steel composite conductive rod prepared by an explosive welding process;

[0037] Figure 7 Schematic diagram of the structure of the support shell in a copper-stainless steel composite conductive rod prepared by an explosive welding process.

[0038] In the figure: 1. Outer shell; 2. Static cover; 3. Copper-stainless steel composite conductive rod prepared by explosive welding process; 4. Stabilizing device; 41. Insulating protective sleeve; 42. Insulating connecting sleeve; 43. Insulating assembly plate; 44. Insulating assembly pad; 45. First insulating block; 46. Second insulating block; 47. Insulating positioning threaded rod; 48. Limiting pad; 49. Insulating gasket; 410. Insulating threaded sleeve; 5. Bellows shielding cover; 6. Bellows body; 7. Guide sleeve; 8. Dynamic conductive rod; 9. Dynamic cover ; 10. Protection device; 101. First insulating reinforcement sleeve; 102. Second insulating reinforcement sleeve; 103. First insulating plate; 104. Second insulating plate; 105. First insulating pad; 106. Second insulating pad; 107. First insulating semi-threaded rod; 108. Second insulating semi-threaded rod; 109. Insulating nut; 1010. Support shell; 1011. Insulating connection pad; 1012. Support spring; 1013. Support pad; 1014. Reinforced insulating column; 1015. Limiting shell. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figure 1-7In the embodiment of the present invention, a copper-stainless-steel composite conductive rod prepared by an explosive welding process includes an outer shell 1, a static cover plate 2 is installed inside the outer shell 1, a copper-stainless-steel composite conductive rod body 3 prepared by the explosive welding process is connected to the top of the static cover plate 2, a stabilizing device 4 is provided on the outside of the copper-stainless-steel composite conductive rod body 3 prepared by the explosive welding process, an outer layer of the copper-stainless-steel composite conductive rod body 3 prepared by the explosive welding process is an oxygen-free copper material for conduction, an inner core of the copper-stainless-steel composite conductive rod body 3 prepared by the explosive welding process is a high-strength steel material, and an inner core of the copper-stainless-steel composite conductive rod body 3 prepared by the explosive welding process is a stainless steel material. The outer layer of oxygen-free copper material of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process is composited with the internal steel core by the explosion welding technology. The oxygen-free copper outer surface of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process is processed with the required brazing structure. The internal steel core of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process is processed with internal and external threads. The outer side of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process is provided with a protective device 10. The top of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process is connected to a bellows shielding cover 5. The top of the bellows shielding cover 5 is installed with a bellows body 6. The bellows body 6 A guide sleeve 7 is fixed on the top, a dynamic conductive rod 8 is fixed on the top of the guide sleeve 7, and a dynamic cover plate 9 is fixed on the top of the outer shell 1. The outer layer of the oxygen-free copper material of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process is used for conductivity, and the inner core stainless steel or high-strength steel is used to enhance the mechanical properties of the overall conductive rod. The outer surface of the oxygen-free copper can be processed with the required brazing structure, which is convenient for brazing with other parts; the internal steel core can be processed with internal threads, external threads and other connection structures for reliable connection with circuit breakers, etc. The outer layer of oxygen-free copper and the internal steel core are composited by explosion welding technology to achieve metallurgical bonding between the oxygen-free copper and the internal steel core, and the interface strength is high to avoid Acid storage occurs during the later pickling process, and the oxygen-free copper and the internal steel core form a metallurgical bond at the bonding surface, strengthening the bonding strength between the internal steel core and the oxygen-free copper. After compounding, the conductivity of the outer layer of oxygen-free copper material is ≥55MS / m, and the bonding layer strength is ≥140Mpa. After compounding oxygen-free copper and high-strength metal materials such as stainless steel, an integral conductive rod is formed. The mechanical strength of the internal and external materials is mutually reinforced, meeting the requirements of high conductivity and high mechanical strength. The conductive rod and pickling are processed in one go, the assembly is simple in production, and the welding reliability is high. It can effectively solve the problem of stainless steel core desoldering or fracture in the current structure during use, and can also prolong the service life of the vacuum interrupter.

[0041] The stabilizing device 4 includes an insulating protective sleeve 41, the outer side of the insulating protective sleeve 41 is connected to an insulating connecting sleeve 42 by rotating through a rotating shaft, an insulating assembly plate 43 is fixed to the outer side of the insulating protective sleeve 41, the insulating protective sleeve 41 is fixedly connected to the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process, the insulating assembly plate 43 and the insulating protective sleeve 41 are bonded and fixed, an insulating assembly pad 44 is fixed to the outer side of the insulating connecting sleeve 42, a first insulating block 45 is fixed to the outer side of the insulating assembly plate 43, a second insulating block 46 is fixed to the outer side of the insulating assembly pad 44, an insulating positioning threaded rod 47 is fixed to the side of the second insulating block 46 close to the first insulating block 45, a limiting groove is provided on the outer side of the first insulating block 45, the size of the limiting groove is adapted to the diameter of the insulating positioning threaded rod 47, a limiting pad 48 is fixed to one end of the insulating positioning threaded rod 47, an insulating gasket 49 is movably sleeved on the outer side of the insulating positioning threaded rod 47, an insulating threaded sleeve 410 is threadedly connected to the outer side of the insulating protective sleeve 41 and the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process The stainless steel composite conductive rod body 3 is fixedly connected, and the inner wall of the insulating protective sleeve 41 is fitted with the outer wall of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process. The user moves the insulating connecting sleeve 42 to allow the insulating connecting sleeve 42 to rotate on the outside of the insulating protective sleeve 41. After the inner wall of the insulating connecting sleeve 42 is fitted with the outer wall of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process, the insulating positioning threaded rod 47 on one side of the second insulating block 46 is movably inserted into the first insulating block 45. At this time, the insulating threaded sleeve 410 can be rotated clockwise, and the corresponding surface of the insulating threaded sleeve 410 is fitted with the outer side of the insulating gasket 49, and the corresponding surface of the insulating gasket 49 is fitted with the outer side of the first insulating block 45, so as to quickly complete the fixing of the position of the insulating connecting sleeve 42. The outer side of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process is supported and reinforced by the insulating connecting sleeve 42 and the insulating protective sleeve 41. Under the premise of not affecting the normal use of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process, the protection of the outer side of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process is improved;

[0042] The method for preparing a copper-stainless steel composite conductive rod prepared by an explosive welding process comprises the following steps:

[0043] S1. Material preparation

[0044] Copper tube: Choose high-purity copper tube (such as TU0 / TU1 oxygen-free copper, etc.) to ensure it has good electrical conductivity, thermal conductivity and plasticity;

[0045] Stainless steel rod: Choose austenitic stainless steel (such as 304, 316 or 304L, 316L, etc.) to ensure it has high strength, corrosion resistance and good mechanical properties;

[0046] Explosives: Choose explosives with moderate detonation velocity and uniform energy distribution (such as ammonium nitrate mixed explosives);

[0047] S2. Process the copper tube and stainless steel rod according to the predetermined size and shape and polish the surface (roughness 0.4 μm);

[0048] S3. Assemble the copper tube, stainless steel rod and explosives through the base, cartridge, steel mandrel and other molds;

[0049] Put the copper tube on the stainless steel rod, and keep a certain gap between the two (usually 1-10mm, the gap size varies with the thickness of the copper tube);

[0050] A layer of explosives is evenly laid on the outer surface of the copper tube. The thickness and distribution of the explosives must be precisely controlled to ensure uniform transfer of the explosive energy.

[0051] As an embodiment of the present invention, the protective device 10 includes a first insulating reinforcement sleeve 101, the outer side of the first insulating reinforcement sleeve 101 is rotatably connected to the second insulating reinforcement sleeve 102 through a rotating shaft, the outer side of the first insulating reinforcement sleeve 101 is fixed with a first insulating plate 103, the outer side of the second insulating reinforcement sleeve 102 is fixed with a second insulating plate 104, the outer side of the first insulating plate 103 is fixed with a first insulating pad 105, the outer side of the first insulating pad 105 is fixed with a first insulating semi-threaded rod 107, the outer side of the second insulating plate 104 is fixed with a second insulating pad 106, the outer side of the second insulating pad 106 is fixed with a second insulating semi-threaded rod 108, and the outer sides of the first insulating semi-threaded rod 107 and the second insulating semi-threaded rod 108 are threadedly connected with an insulating nut 109. A support shell 1010 is embedded and fixed inside the first insulating reinforcement sleeve 101 and the second insulating reinforcement sleeve 102. An insulating connection pad 1011 is fixed to the inner wall of one side of the support shell 1010. A support spring 1012 is connected to one side of the insulating connection pad 1011. The end of the support spring 1012 away from the insulating connection pad 1011 is connected to a support pad 1013. A reinforced insulating column 1014 is fixed on one side of the support pad 1013 and passes through the other side thereof. A limiting shell 1015 is fixed on the outside of the support shell 1010. The limiting shell 1015 is embedded and fixed inside the first insulating reinforcement sleeve 101 and the second insulating reinforcement sleeve 102. The first insulating reinforcement sleeve 101 and the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process are fixedly connected.

[0052] The working principle of the present invention is as follows: when the device is in use, the outer layer of oxygen-free copper material of the copper-stainless steel composite conductive rod body 3 prepared by the explosion welding process is used for conductivity, and the inner core stainless steel or high-strength steel is used to enhance the mechanical properties of the entire conductive rod. The outer surface of the oxygen-free copper can be processed into the required brazing structure, which is convenient for brazing with other parts; the inner steel core can be processed into internal threads, external threads and other connection structures for reliable connection with circuit breakers, etc. The outer layer of oxygen-free copper and the inner steel core are composited by the explosion welding technology, so that the oxygen-free copper and the inner steel core achieve metallurgical bonding between the metals, and the interface strength is high to avoid the occurrence of metal defects in the later stage. Acid storage occurs during the pickling process, and the oxygen-free copper and the internal steel core form a metallurgical bond at the bonding surface, strengthening the bonding strength between the internal steel core and the oxygen-free copper. After compounding, the conductivity of the outer layer of oxygen-free copper material is ≥55MS / m, and the bonding layer strength is ≥140Mpa. After compounding high-strength metal materials such as oxygen-free copper and stainless steel, an integral conductive rod is formed. The mechanical strength of the two materials inside and outside is mutually reinforced, meeting the requirements of high conductivity and high mechanical strength. The conductive rod and pickling are processed at one time, the assembly is simple in production, the welding reliability is high, and it can effectively solve the problem of stainless steel core desoldering or breakage in the current structure during use. , and can improve the service life of the vacuum interrupter; the device is provided with a stabilizing device 4, the insulating protective sleeve 41 and the copper stainless steel composite conductive rod body 3 prepared by the explosion welding process are fixedly connected, and the inner wall of the insulating protective sleeve 41 is in contact with the outer wall of the copper stainless steel composite conductive rod body 3 prepared by the explosion welding process, and the user moves the insulating connecting sleeve 42 to rotate the insulating connecting sleeve 42 outside the insulating protective sleeve 41. After the inner wall of the insulating connecting sleeve 42 is in contact with the outer wall of the copper stainless steel composite conductive rod body 3 prepared by the explosion welding process, the insulating positioning threaded rod 47 on one side of the second insulating block 46 is movably plugged into the first Inside the insulating block 45, the insulating threaded sleeve 410 can be rotated clockwise at this time, and the corresponding surface of the insulating threaded sleeve 410 is affixed to the outside of the insulating gasket 49, and the corresponding surface of the insulating gasket 49 is affixed to the outside of the first insulating block 45, quickly completing the fixing of the position of the insulating connecting sleeve 42. The outer side of the copper-stainless steel composite conductive rod body 3 prepared by the explosive welding process is supported and reinforced by the insulating connecting sleeve 42 and the insulating protective sleeve 41. Under the premise of not affecting the normal use of the copper-stainless steel composite conductive rod body 3 prepared by the explosive welding process, the protection of the outer side of the copper-stainless steel composite conductive rod body 3 prepared by the explosive welding process is improved;The device is provided with a protective device 10, a first insulating reinforcement sleeve 101 is fixed on the outside of the copper-stainless steel composite conductive rod body 3 prepared by the explosive welding process, and then the second insulating reinforcement sleeve 102 can be rotated to make the second insulating plate 104 on the outside of the second insulating reinforcement sleeve 102 and the first insulating plate 103 on the outside of the first insulating reinforcement sleeve 101 fit together, at this time the second insulating pad 106 and the first insulating pad 105 fit together, and the first insulating semi-threaded rod 107 and the second insulating semi-threaded rod 108 form a complete threaded rod, which can be locked by using an insulating nut 109 and the first insulating semi-threaded rod 107 and the second insulating semi-threaded rod 108. At this time, the support shell 101 The internal support spring 1012 pushes the support pad 1013 to move, which in turn drives the reinforced insulating column 1014 to move. One end of the reinforced insulating column 1014 is attached to the outside of the copper-stainless-steel composite conductive rod body 3 produced by the explosive welding process, ensuring that the first insulating reinforcement sleeve 101 and the second insulating reinforcement sleeve 102 are firmly fixed to the outside of the copper-stainless-steel composite conductive rod body 3 produced by the explosive welding process. The first insulating reinforcement sleeve 101 and the second insulating reinforcement sleeve 102 protect the outside of the copper-stainless-steel composite conductive rod body 3 produced by the explosive welding process, without affecting the normal use of the copper-stainless-steel composite conductive rod body 3 produced by the explosive welding process, and thus helping to increase the service life of the device.

[0053] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A copper-stainless steel composite conductive rod prepared by explosive welding process, comprising an outer shell (1), characterized in that: The outer shell (1) is fitted with a static cover plate (2), the top of the static cover plate (2) is connected to a copper-stainless steel composite conductive rod body (3) prepared by an explosion welding process, a stabilizing device (4) is provided on the outside of the copper-stainless steel composite conductive rod body (3) prepared by an explosion welding process, a protective device (10) is provided on the outside of the copper-stainless steel composite conductive rod body (3) prepared by an explosion welding process, a bellows shielding cover (5) is connected to the top of the copper-stainless steel composite conductive rod body (3) prepared by an explosion welding process, a bellows body (6) is installed on the top of the bellows shielding cover (5), a guide sleeve (7) is fixed to the top of the bellows body (6), a dynamic conductive rod (8) is fixed to the top of the guide sleeve (7), and a dynamic cover plate (9) is fixed to the top of the outer shell (1); The method for preparing a copper-stainless steel composite conductive rod prepared by explosive welding process comprises the following steps: S1. Material preparation Copper tube: Choose high-purity copper tube to ensure it has good electrical conductivity, thermal conductivity and plasticity; Stainless steel rod: choose austenitic stainless steel to ensure its high strength, corrosion resistance and good mechanical properties; Explosives: Choose explosives with moderate detonation velocity and uniform energy distribution; S2. Processing and surface polishing the copper tube and stainless steel rod according to predetermined size and shape; S3. Assemble the copper tube, stainless steel rod and explosives through the base, cartridge, steel mandrel and other molds; put the copper tube on the stainless steel rod, keeping a certain gap between the two; A layer of explosives is evenly laid on the outer surface of the copper tube. The thickness and distribution of the explosives must be precisely controlled to ensure uniform transfer of the explosive energy.

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