Electrical connection structure and connection method for a high-voltage switch conductor

Abstract

The application discloses a kind of high-voltage switch conductor electric connection structure and connection method, comprising: spring is assembled in cylindrical blind hole, locking part is contacted with the other end of spring, locking part is arranged between first conductor and second conductor, the other end of locking part is contacted with main body;First conductor and second conductor are connected by the buckling between wedge cone step and first inner cut body, so that first conductor and second conductor are connected.The compression reaction force of the spring is used as the direct force for fastening the electric connection of the first conductor and the second conductor, replacing the indirect force of the screw fastening torque;The structural parts for driving and maintaining the electric connection of the conductor are hidden in the core of the high-voltage switch conductor, and no part is exposed for maintaining the connection performance, so as to ensure that the outline of the conductor to be connected is a whole isodiametric cylindrical shape, and the electric field intensity distribution around the connection part conductor is optimized.Effective fastening electric connection reduces the temperature rise effect, and has superior current-carrying performance.

Description

Technical Field

[0001] This invention belongs to the field of electrical connector technology and relates to an electrical connection structure and connection method for a high-voltage switch conductor. Background Technology

[0002] High-voltage switchgear extensively utilizes conductors that carry current and conduct electricity. To safely conduct large currents, conductors are typically manufactured from aluminum alloy tubes or rods with high conductivity. Since conductors consist of multiple segments, connections between them are essential to reduce contact resistance. Conventional fastening connections usually employ threaded assembly or welding. The former requires numerous redundant parts and structures at the assembly joint to improve the electric field condition; the latter is unsuitable in many situations due to the adverse effects of welding temperature on insulation, the negative impact of welding on the cleanliness of internal components, and the adverse effects of welding deformation. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of excessive redundant parts and structures in the threaded assembly electrical connection of conductor components in the prior art, as well as the problems of welding temperature, cleanliness of internal components and welding deformation caused by welding connection, and to provide an electrical connection structure and connection method for high voltage switch conductors.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] An electrical connection structure for a high-voltage switch conductor includes: a first conductor, a second conductor, a spring, and a locking component;

[0006] The first conductor has a wedge-shaped step on one side; the second conductor includes a main body and a first inner cut-off body, the first inner cut-off body being disposed at one end of the main body; a cylindrical blind hole is disposed inside the first conductor, a spring is assembled in the cylindrical blind hole, a locking part is in contact with the other end of the spring, the locking part is disposed between the first conductor and the second conductor, and the other end of the locking part is in contact with the main body; the first conductor and the second conductor are connected by the engagement between the wedge-shaped step and the first inner cut-off body.

[0007] A further improvement of the present invention is that:

[0008] Furthermore, the main body is provided with a blind hole, and one end of the locking part is frustum-shaped; the frustum-shaped end of the locking part is inserted into the blind hole on the main body.

[0009] Furthermore, one end of the first conductor is externally connected to the first component; the first component and the first conductor are connected by welding; the first component is a long conductor and is electrically conductive with the first conductor.

[0010] Furthermore, one end of the second conductor is externally connected to a second component; the second component and the second conductor are connected by welding; the second component is a long conductor and is electrically conductive with the second conductor.

[0011] Furthermore, one end of the second conductor is externally connected to another first conductor; a second inner removal body is provided on the other side of the main body; the second inner removal body is connected to the wedge-shaped step of the other first conductor.

[0012] Furthermore, the first and second conductors are connected in sequence.

[0013] Furthermore, the top support fixture includes a protrusion and a flat panel; a second groove is provided at one end of the frustum-shaped locking part, and a first groove is provided at the opening of the cylindrical blind hole on the first conductor; the protrusion is provided at one end of the flat panel; the protrusion cooperates with the second groove of the locking part; one side of the flat panel with the protrusion cooperates with the first groove of the first conductor; under the action of external force, the top support fixture pushes the locking part to be fully inserted into the cylindrical blind hole.

[0014] Furthermore, a second through hole is provided on the side of the locking part, and a first hole is provided on the side of the first conductor. The limiting tooling rod passes through the first hole and the second through hole in sequence, so that the locking part is fixed in the cylindrical blind hole of the first conductor.

[0015] Furthermore, the wedge-shaped step and the cone-shaped slope plane of the first inner cut-out body are conductive connection surfaces, and the surfaces are silver-plated.

[0016] A method for connecting an electrical connection structure of a high-voltage switch conductor, comprising:

[0017] The spring is assembled in the cylindrical blind hole of the first conductor, and then the locking part is brought into contact with the other end of the spring. Under the action of external force, the top support fixture squeezes the locking part and the spring into the cylindrical blind hole, and passes through the first hole and the second through hole through the limiting fixture rod, so that the locking part is fixed in the cylindrical blind hole of the first conductor. The top support fixture is removed, and the first conductor and the second conductor are assembled through the wedge-shaped step and the first inner cut-out body, and the limiting fixture rod is pulled out. The locking part moves under the action of the spring and stops when it reaches the body of the second conductor. The first conductor prevents the second conductor from moving away from the first conductor through the engagement between the wedge-shaped step and the first inner cut-out body. The spring ensures a tight electrical connection between the wedge-shaped step and the first inner cut-out body on the first conductor and the second conductor.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention connects a spring assembled in a cylindrical blind hole, with a locking component in contact with the other end of the spring. The locking component is positioned between a first conductor and a second conductor, with its other end in contact with the main body. The first and second conductors are connected by a wedge-shaped step and a first inner cut-out body. This invention utilizes the compression reaction force of the spring as the direct force for securing the electrical connection between the first and second conductors, replacing the indirect force of the threaded tightening torque. The structural components that drive and maintain the conductor connection are hidden within the core of the high-voltage switch conductor, with no exposed components maintaining the connection effectiveness. This ensures that the conductors to be connected have an integral, uniform cylindrical shape, effectively optimizing the electric field distribution around the conductor at the connection point. The effective securing of the electrical connection reduces the temperature rise effect and provides superior current conduction performance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A cross-sectional view of a welded threaded assembly conductor connection;

[0022] Figure 2 A cross-sectional view of a threaded assembly type fixed connection conductor for a threaded connection;

[0023] Figure 3 This is an isometric view of the first and second conductors of the present invention in their operational service state.

[0024] Figure 4 This is a three-dimensional exploded view of the electrical connection structure of the high-voltage switch conductor of the present invention;

[0025] Figure 5 (a) is a diagram of the outline of the first conductor;

[0026] Figure 5 (b) is a cross-sectional view along the transverse direction of the first groove in the first conductor;

[0027] Figure 5 (c) is a cross-sectional view along the vertical direction of the first groove in the first conductor;

[0028] Figure 6 A partially enlarged three-dimensional view of the mounting side face of the first conductor;

[0029] Figure 7 (a) is a diagram of the outline of the second conductor;

[0030] Figure 7 (b) is a cross-sectional isometric view of the second conductor;

[0031] Figure 8 This is another diagram of the second conductor;

[0032] Figure 9 (a) is a drawing of the outline of the locking part;

[0033] Figure 9 (b) is a cross-sectional view along the transverse direction of the second groove in the locking part;

[0034] Figure 9 (c) is a cross-sectional view along the vertical direction of the second groove in the locking part;

[0035] Figure 10 This is a diagram of the spring's outline.

[0036] Figure 11 This is a sectional isometric view of the limiting tooling rod during assembly.

[0037] Figure 12 This is the outline drawing of the support fixture;

[0038] Figure 13 Axonometric view of the first step in assembling electrical connections;

[0039] Figure 14 (a) is a cross-sectional isometric view of the second step of the electrical connection assembly;

[0040] Figure 14 (b) is a top-view enlarged view of the second step of the electrical connection assembly;

[0041] Figure 14 (c) is a partial enlarged view of the second step of the electrical connection assembly;

[0042] Figure 15 (a) is a cross-sectional isometric view of the third step of the electrical connection assembly;

[0043] Figure 15 (b) is a top-view enlarged view of the third step of the electrical connection assembly;

[0044] Figure 16 (a) is a cross-sectional isometric view of the fourth step of the electrical connection assembly;

[0045] Figure 16 (b) is a top-view enlarged view of the fourth step of the electrical connection assembly;

[0046] Figure 16 (c) is a partial enlarged view of the fourth step of the electrical connection assembly;

[0047] Figure 17A partial sectional view showing the operational status of the first part, the spring, the locking part, and the second part;

[0048] Figure 18 (a) is the outline drawing of the first part;

[0049] Figure 18 (b) is a cross-sectional isometric view of the first part;

[0050] Figure 19 (a) is the outline drawing of the second part;

[0051] Figure 19 (b) is a cross-sectional isometric view of the second part.

[0052] Wherein, 1-first conductor; 2-second conductor; 3-spring; 4-locking part; 5-limiting tooling rod; 6-top support tooling; 7-first part; 8-second part; 9-first hole; 10-cylindrical blind hole; 11-wedge cone step; 12-first groove; 13-first internal removal body; 14-second internal removal body; 15-blind hole; 16-second through hole; 17-second groove; 18-frustum shape; 19-protrusion; 20-flat plate. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0055] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0056] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0057] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0058] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0059] The present invention will now be described in further detail with reference to the accompanying drawings:

[0060] See Figure 1 To connect the φ90 aluminum alloy tube conductor on the right end to the φ112 aluminum alloy rod conductor ①-2 on the left end, an aluminum alloy rod connector ①-1 is first welded to the end of the tube conductor using connecting weld ①-3, and then the conductors are fixedly connected using a threaded pair. To improve the electric field condition, a φ142 shielded connection adapter ①-4 is used as a connection transition part. The adapter ①-4 and the right end conductor ①-1 are connected using four M12×45 phosphated screws ①-6 and four M12 washers ①-5. Then, the adapter ①-4 and the left end φ112 conductor ①-2 are connected using four M12×90 phosphated screws ①-8 and four M12 washers ①-7. It can be found that the most significant drawback of using a threaded pair assembly connection to improve the electric field condition is that there are a lot of redundant parts in the connection, for example... Figure 1 The presence of 17 redundant parts inevitably increases component costs and complicates the assembly process, further increasing costs.

[0061] See Figure 2To securely connect the two φ125×15 aluminum alloy tube conductors ①-9 and ①-10, a special adapter conductor ①-11 was designed. The upper and lower tube conductors were then connected by torque using 2×6 M8×30 ​​phosphated screws ①-13. However, the use of screws, washers, and other threaded components significantly degraded the electric field in the connection area. To improve the electric field conditions, a special shield ①-12 had to be installed in the connection area, and then 3 M6×12 phosphated screws ①-14 were used to fix ①-12 to ①-11. Figure 2 There are as many as 16 redundant connecting parts, and the shielding cover ①-12 has a relatively complex processing structure, which significantly increases the cost of parts, manufacturing costs and assembly costs.

[0062] Welding is another existing technology for fixing electrical connections between conductors, but its drawbacks are also quite obvious. In many cases, conductors must be partially assembled before the two assemblies need to be fixedly connected. Welding is often unsuitable in these situations for four reasons: ① The assemblies to be welded often already have their insulating supports cast onto the metal conductors. In this case, the weld bevel of the metal conductor is often very close to the insulating component. The welding arc temperature is extremely high, reaching up to 2000℃. The welding temperature field will cause the temperature of the insulating component to rise, and if it exceeds the glass transition temperature of the insulating component, it will damage its performance. ② The fusion welding process generates a large amount of welding spatter, which can fly into the assembly gaps and is difficult to remove, compromising the cleanliness of the assembly and easily causing discharge quality problems. ③ Sometimes, to meet the performance requirements of high-voltage switchgear products, it is necessary to electrically connect copper and copper alloy conductors with aluminum alloy conductors. However, ordinary fusion welding methods cannot achieve reliable welds between dissimilar metals. ④ Welding deformation is unavoidable during the welding process. Since the conductor has already been partially assembled, this deformation cannot be eliminated by subsequent machining. Welding deformation will affect the assembly accuracy of the conductor and may even prevent proper assembly. Therefore, welded connections of conductors are severely limited in many applications.

[0063] See Figure 3 and Figure 4 The present invention discloses an electrical connection structure for a high-voltage switch conductor, comprising: a first conductor 1, a second conductor 2, a spring 3, and a locking component 4;

[0064] The first conductor 1 has a wedge-shaped step 11 on one side; the second conductor 2 includes a main body and a first inner removal body 13, the first inner removal body 13 is disposed at one end of the main body; a cylindrical blind hole 10 is disposed inside the first conductor 1, a spring 3 is assembled in the cylindrical blind hole 10, a locking part 4 is in contact with the other end of the spring 3, the locking part 4 is disposed between the first conductor 1 and the second conductor 2, and the other end of the locking part 4 is in contact with the main body; the first conductor 1 and the second conductor 2 are connected by the engagement between the wedge-shaped step 11 and the first inner removal body 13.

[0065] See Figure 5 (a) Figure 5 (b) Figure 5 (c) and Figure 6 The first conductor 1 has a rotating structure, with a dedicated cylindrical blind hole 10 along its axis of rotation, serving as a housing for the spring 3 and limiting its elastic deformation. Two identical wedge-shaped steps 11 are evenly distributed circumferentially around the outer periphery of the first conductor 1. The two wedge-shaped steps 11 are furthest apart on the opening end face of the cylindrical blind hole 10 on the first conductor 1, extending axially into the bottom of the cylindrical blind hole 10, with the distance between the two steps gradually decreasing. The acute angle between the two steps is 8–15°, with an optimal angle of 11°. The two conical surfaces are the conductive connection surfaces of the high-voltage switch conductor's electrical connection structure, and their surfaces are silver-plated. A first hole 9 is formed on the side of the first conductor 1; the axis of this hole may be parallel or not parallel to the conical surface. A first groove 12 is formed on the mounting side end face of the first conductor 1 for a support fixture 6. Under external force, the support fixture 6 pushes the locking part 4 completely into the cylindrical blind hole 10. The arc edges on the electrical connection side of the first conductor 1 are rounded to further optimize the electric field environment around the conductor. The material of the first conductor 1 can be any conductive metal, such as aluminum and any aluminum alloy; it can also be copper and any copper alloy; or any other metallic element or alloy conductive material.

[0066] The main body is provided with a blind hole 15, and one end of the locking part 4 is a frustum 18; one end of the frustum 18 of the locking part 4 is inserted into the blind hole 15 on the main body. One end of the first conductor 1 is externally connected to the first part 7; the first part 7 and the first conductor 1 are connected by welding; the first part 7 is a long conductor and is electrically conductive with the first conductor 1. One end of the second conductor 2 is externally connected to the second part 8; the second part 8 and the second conductor 2 are connected by welding; the second part 8 is a long conductor and is electrically conductive with the second conductor 2.

[0067] See Figure 7 (a) and Figure 7(b) The overall outline of the second conductor 2 is a rotating body structure. A notch is formed by milling through a portion of metal at one end of the second conductor 2. The removed surface 13 is symmetrically distributed in a conical slope shape. The distance between the two conical slopes is smallest at the end of the second conductor 2, extending along the axis into the bottom of the notch, with the distance gradually increasing. The acute angle between the two conical slopes is 8–15°, with an optimal angle of 11°. The removed portion of the second conductor 2 can be fitted with two wedge-shaped steps on the first conductor 1. The two conical slope planes are the conductive connection surfaces of the electrical connection structure of the high-voltage switch conductor, and their surfaces are silver-plated. At the end of the notch in the second conductor 2, a conical blind hole 15 is formed. The bottom of the blind hole 15 is small, while the opening is wide; the single-sided taper of the conical blind hole is 1–5°, with an optimal angle of 3°. The rounded edges on the electrical connection side of the second conductor 2 are rounded to further optimize the electric field environment around the conductor. The material of the second conductor 2 can be any conductive metal, such as aluminum and any aluminum alloy; copper and any copper alloy; or any other metallic element or alloy conductive material.

[0068] The second conductor 2 can be as follows: Figure 8 As shown, one end of the second conductor 2 is connected to another first conductor 1; a second inner removal body 14 is provided on the other side of the main body; the second inner removal body 14 is connected to the wedge-shaped step 11 of the other first conductor 1; the first conductor 1 and the second conductor 2 are connected in sequence.

[0069] Both the first conductor 1 and the second conductor 2 can have various shapes of insulator structures pre-cast and connected on their respective base structures and rotating metal structures. Figure 8 An example is provided of a structure derived from the external insulator structure of the first inner cut-off body 13.

[0070] The top support fixture 6 includes a protrusion 19 and a flat panel 20; one end of the frustum-shaped 18 of the locking part 4 is provided with a second groove 17, and the opening of the cylindrical blind hole on the first conductor 1 is provided with a first groove 12; the protrusion 19 is provided at one end of the flat panel 20; the protrusion 19 cooperates with the second groove 17 of the locking part 4; one side of the flat panel 20 provided with the protrusion 19 cooperates with the first groove 12 of the first conductor 1; under the action of external force, the top support fixture 6 pushes the locking part 4 to be fully inserted into the cylindrical blind hole 10.

[0071] The locking part 4 has a second through hole 16 on its side, and the first conductor 1 has a first hole 9 on its side. The limiting tooling rod 5 passes through the first hole 9 and the second through hole 16 in sequence, so that the locking part 4 is fixed in the cylindrical blind hole 10 of the first conductor 1.

[0072] The conical slope plane of the wedge-shaped step 11 and the first inner cut-out body 13 is a conductive connection surface, and the surface is silver-plated.

[0073] See Figure 9(a) Figure 9 (b) and Figure 9 As shown in (c), the locking part 4 has a rotating structure. Figure 9 (a) The left half of the locking part 4 is cylindrical, and a tapered slope is cut on the right half. The large end of the tapered slope has the same diameter as the cylindrical section. The right end of the locking part 4 has the smallest diameter. The single-sided taper of the tapered slope is 1-5°, and the optimal included angle is 3°. During the operation of the conductor electrical connection structure, the locking part 4 will bridge and fill the first conductor 1 and the second conductor 2. The cylindrical section of the locking part 4 is located in the cylindrical blind hole 10 in the middle of the first conductor 1, and most of the tapered end of the locking part 4 is located in the tapered blind hole 15 of the second conductor 2. A second through hole 16 is opened on the side of the locking part 4, and the second through hole 16 is located at the midpoint of the part's axial direction. The diameter of the second through hole 16 can be equal to the outer diameter of the limiting fixture rod 5 and have a clearance fit; or the diameter of the second through hole 16 can be slightly larger than the outer diameter of the limiting fixture rod 5 for use. The diameter of the second through hole 16 is 2mm larger than the diameter of the limiting fixture rod 5. At the small-diameter end of the tapered section of the locking part 4, a second groove 17 with a rectangular cross-section and a support fixture 6 is milled, passing through the center. The direction of the second groove 17 is parallel to the axis of the process through hole. The opening of the second groove 17 ensures that when the locking part 4 is pressed against the part 3 by the support fixture 6, the second through hole 16 of the locking part 4 is aligned with the first hole 9 on the side of the first conductor 1. The limiting fixture rod 5 passes through the first hole 9 on the side of the first conductor 1 and the second through hole 16 of the locking part 4 in sequence, fixing the locking part 4 in the cylindrical blind hole 10. The material of the locking part 4 can be any metal or non-metal, and any material that meets the material rigidity required for the locking function of the invention structure is acceptable.

[0074] See Figure 10 Spring 3 uses a common cylindrical helical compression spring, with both ends of spring 3 tightly ground flat. Spring 3 can use a double-layer spring, with the inner and outer springs having opposite helical directions. Spring 3 can also use only a single-layer cylindrical helical compression spring. The material used for spring 3 can be carbon spring steel wire, special alloy steel wire for spring steel, or various stainless steel wires, etc. Before spring 3 is inserted into the cylindrical blind hole 10 of the first conductor 1, it is in a free-height state; after spring 3 is inserted into the cylindrical blind hole 10 using the limiting fixture rod 5, it is in a "tight" compression state, with the limiting fixture rod 5 bearing the compression force of spring 3, and this state lasts for a short period of time; after the coaxial assembly and installation of the first conductor 1 and the second conductor 2 is completed, after the limiting fixture rod 5 is removed, spring 3 is in a "loose" compression state for permanent service, continuously outputting compression reaction force to maintain the axial tight electrical connection between the conductors.

[0075] See Figure 11During assembly, the limiting fixture 5 passes sequentially through the first hole 9 on the side of the first conductor 1 and the second through hole 16 of the locking part 4; the limiting fixture 5 is the basic guarantee before the radial sliding coaxial alignment assembly of the first conductor 1 and the second conductor 2. The limiting fixture 5 is a simple round bar, and various metal or non-metal materials with the required hardness and rigidity can be used. The limiting fixture 5 is a temporary part.

[0076] When the top support fixture 6 pushes and pushes the locking part 4 and the spring 3, it effectively overcomes the strong compressive force of the spring 3. At the same time, it ensures that the first hole 9 on the side of the first conductor 1 and the second through hole 16 of the locking part 4 are concentrically aligned with the limiting fixture rod 5 through the protrusion 19 and the flat panel 20. This is a prerequisite for the assembly of the limiting fixture rod 5. Figure 12 This is the isometric view of the top support fixture 6. Figure 12 In the middle, the rectangular cross-section stepped structure of the protrusion 19 and the flat panel 20 are such that the protrusion 19 precisely matches the second groove 17 on the locking part 4, and the flat panel 20 precisely matches the first groove 12 on the first conductor 1. Apart from the two rectangular cross-section stepped structures on the top support fixture 6, other structures are not necessarily so. Figure 12 In the diagram, the structure on the right is provided as an example for illustrative purposes. Any additional auxiliary structures added to the existing rectangular cross-section stepped structure, including the two protrusions 19 on the left side of the base and the flat panel 20, are within the scope of protection sought by this invention. The material of the top support fixture 6 can be any metallic or non-metallic material, as long as it possesses the hardness and rigidity required for the part's function. The top support fixture 6 is a temporary part.

[0077] A method for connecting an electrical connection structure of a high-voltage switch conductor, comprising:

[0078] Spring 3 is assembled in the cylindrical blind hole 10 of the first conductor 1, and then locking part 4 is brought into contact with the other end of spring 3. Under the action of external force, top support fixture 6 presses locking part 4 and spring 3 into the cylindrical blind hole 10 and moves through the first hole 9 and the second through hole 16 through the limiting fixture rod 5, so that locking part 4 is fixed in the cylindrical blind hole 10 of the first conductor 1. Remove top support fixture 6, assemble the first conductor 1 and the second conductor 2 through wedge cone step 11 and the first inner cut-out body 13, and pull out the limiting fixture rod 5. Locking part 4 moves under the force of spring 3 and stops when it reaches the body of the second conductor 2. The first conductor 1 prevents the second conductor 2 from moving away from the first conductor 1 through the engagement between wedge cone step 11 and the first inner cut-out body 13. Spring 3 ensures a tight electrical connection between wedge cone step 11 and the first inner cut-out body 13 on the first conductor 1 and the second conductor 2.

[0079] Example: The high-voltage switch electrical connection structure is a novel and original structure. To ensure the reliable and effective implementation of this electrical connection structure, the installation and assembly sequence of the structure also possesses inherent uniqueness due to its uniqueness. The following describes the installation and assembly process of the conductor connection structure:

[0080] See Figure 13 The first step of electrical connection assembly is to insert the spring 3 and the locking part 4 into the cylindrical blind hole 10 of the first conductor 1 in sequence, with the cylindrical section of the locking part 4 entering first and the conical section entering later.

[0081] See Figure 14 (a) Figure 14 (b) and Figure 14 (c) Second step of electrical connection assembly: The supporting fixture 6 pushes the locking part 4 along the axis of the first conductor 1. The protrusion 19 of the supporting fixture 6 fits into the second groove 17 of the locking part 4. The supporting fixture 6 continues to push the locking part 4 and compress the spring 3 until the end face of the flat plate 20 of the supporting fixture 6 fits into the first groove 12 of the first conductor 1, and the supporting spring 3 is compressed into place. At this time, the first hole 9 of the first conductor 1 and the second through hole 16 of the locking part 4 are strictly concentric. The pushing power source of the supporting fixture 6 can be powered by electric or hydraulic equipment, or simply by human power. In essence, any pushing power source structure with the characteristic stepped structure of the supporting fixture 6 as the working surface is within the scope of protection sought by the invention.

[0082] See Figure 15 (a) and Figure 15 (b); Third step of electrical connection assembly: Insert the limiting fixture rod 5 into the first hole 9 of the first conductor 1 and the second through hole 16 of the locking part 4. At this time, the limiting fixture rod 5 is concentric with the holes on the first conductor 1 and the locking part 4. Then, after removing the top support fixture 6, since the diameter of the limiting fixture rod 5 is 2mm smaller than the diameter of the holes on the first conductor 1 and the locking part 4, the locking part 4 moves slightly to the right under the action of the spring 3. At this time, the left side of the second through hole 16 of the locking part 4 is tangent to the limiting fixture rod 5, and the limiting fixture rod 5 is tangent to the right side of the first hole 9 of the first conductor 1. At this time, the right end face of the locking part 4 is not higher than the right end face of the first conductor 1, ensuring the smooth progress of the subsequent radial sliding connection assembly of the second conductor 2 and the first conductor 1. The sliding connection between the second conductor 2 and the first conductor 1 is ready.

[0083] See Figure 16 (a) Figure 16 (b) and Figure 16(c); Fourth step of electrical connection assembly: The second conductor 2 is radially slid onto the first conductor 1. The installation and connection assembly action ensures that the wedge-shaped step 11 of the first conductor 1 matches the tapered notch of the second conductor 2, ensuring that the outer circles of the first conductor 1 and the second conductor 2 are coaxially aligned. Then, the limiting tooling rod 5 is removed. At this time, the spring 3 extends, pushing most of the tapered section of the locking part 4 into the tapered blind hole 15 of the second conductor 2, and the tapered end of the locking part 4 is tangent to the tapered hole of the second conductor 2 in the circumferential direction. Since part of the locking part 4 is in the cylindrical blind hole 10 of the first conductor 1, and most of the tapered section of the locking part 4 is in the tapered hole of the second conductor 2 and in close contact with it, the coaxial self-locking effect of the first conductor 1 and the second conductor 2 in the circumferential direction of the electrical connection structure of the invention is realized. At the same time, the locking part 4 pushes the second conductor 2 to the right. Due to the restriction of the two wedge cones on the first conductor 1 on the two cone slope planes of the second conductor 2, the first conductor 1 has a tendency to prevent the second conductor 2 from moving to the right, thereby realizing the axial self-locking effect of the invented electrical connection structure, and ensuring the tight electrical connection of the two cone slope silver-plated contact surfaces on the first conductor 1 and the second conductor 2 under the compression reaction force of the spring 3.

[0084] See Figure 17 In practical applications, the high-voltage switch conductors to be electrically connected are usually extended on the basic structure of the first conductor 1 and the second conductor 2, and the first part 7 structure is generated based on the characteristics of the first conductor 1; the second part 8 structure is generated based on the characteristics of the second conductor 2.

[0085] See Figure 18 (a) and Figure 18 (b); The first part 7 is a metal tubular conductor; the first part 7 is connected to the first conductor 1 by a first circumferential weld 7-1, the first part 1 is coaxial with the first conductor 1, and the tubular conductor portion is in Figure 18 (a) and Figure 18 (b) shows the cut-off treatment. The first ring weld 7-1 was welded before the assembly and installation of the electrical connection structure of the high-voltage switch conductor.

[0086] See Figure 19 (a) and Figure 19 (b); The second part 8 is a metal tubular conductor. The second part 8 is connected to the second conductor 2 by a second circumferential weld 8-1. The second part 8 is coaxial with the second conductor 2. The tubular conductor portion is... Figure 19 (a) and Figure 19 (b) shows the cut-off treatment. The second ring weld 8-1 was welded before the assembly and installation of the electrical connection structure of the high-voltage switch conductor.

[0087] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electrical connection structure for a high-voltage switch conductor, characterized in that, include: First conductor (1), second conductor (2), spring (3) and locking part (4); The first conductor (1) has a wedge-shaped step (11) on one side; the second conductor (2) includes a main body and a first inner cut-off body (13), the first inner cut-off body (13) is disposed at one end of the main body; a cylindrical blind hole (10) is disposed inside the first conductor (1), the spring (3) is assembled in the cylindrical blind hole (10), the locking part (4) is in contact with the other end of the spring (3), the locking part (4) is disposed between the first conductor (1) and the second conductor (2), and the other end of the locking part (4) is in contact with the main body; the first conductor (1) and the second conductor (2) are connected by the engagement between the wedge-shaped step (11) and the first inner cut-off body (13); The main body is provided with a blind hole (15), and one end of the locking part (4) is a frustum (18); the frustum (18) end of the locking part (4) is inserted into the blind hole (15) on the main body. One end of the first conductor (1) is externally connected to the first component (7); the first component (7) and the first conductor (1) are connected by welding; the first component (7) is a long conductor and is electrically connected to the first conductor (1); One end of the second conductor (2) is externally connected to the second component (8); the second component (8) and the second conductor (2) are connected by welding; the second component (8) is a long conductor and is electrically connected to the second conductor (2); One end of the second conductor (2) is connected to another first conductor (1); a second inner removal body (14) is provided on the other side of the main body; the second inner removal body (14) is connected to the wedge-shaped step (11) of the other first conductor (1); The first conductor (1) and the second conductor (2) are connected in sequence. It also includes a top support fixture (6), which includes a protrusion (19) and a flat panel (20); a second groove (17) is provided at one end of the frustum (18) of the locking part (4), and a first groove (12) is provided at the opening of the cylindrical blind hole on the first conductor (1); the protrusion (19) is provided at one end of the flat plate (20); the protrusion (19) cooperates with the second groove (17) of the locking part (4); one side of the flat plate (20) with the protrusion (19) cooperates with the first groove (12) of the first conductor (1); under the action of external force, the top support fixture (6) pushes the locking part (4) to be fully inserted into the cylindrical blind hole (10).

2. The electrical connection structure of the high-voltage switch conductor according to claim 1, characterized in that, It also includes a limiting tooling rod (5); the side of the locking part (4) is provided with a second through hole (16), and the side of the first conductor (1) is provided with a first hole (9). The limiting tooling rod (5) passes through the first hole (9) and the second through hole (16) in sequence, so that the locking part (4) is fixed in the cylindrical blind hole (10) of the first conductor (1).

3. The electrical connection structure of the high-voltage switch conductor according to claim 2, characterized in that, The cone-shaped steps (11) and the first inner cut-off body (13) have a conductive connection surface with silver plating.

4. A connection method for the electrical connection structure of a high-voltage switch conductor according to claim 1, characterized in that, include: The spring (3) is assembled in the cylindrical blind hole (10) of the first conductor (1), and then the locking part (4) is brought into contact with the other end of the spring (3). Under the action of external force, the top support fixture (6) squeezes the locking part (4) and the spring (3) into the cylindrical blind hole (10), and passes through the first hole (9) and the second through hole (16) through the limiting fixture rod (5), so that the locking part (4) is fixed in the cylindrical blind hole (10) of the first conductor (1). The top support fixture (6) is removed, and the first conductor (1) and the second conductor (2) are passed through the wedge cone. The step (11) and the first inner cutter (13) are assembled, and the limiting tooling rod (5) is pulled out; the locking part (4) moves under the force of the spring (3), and the locking part (4) stops at the body of the second conductor (2); the first conductor (1) prevents the second conductor (2) from moving away from the first conductor (1) by the fastening between the wedge-shaped step (11) and the first inner cutter (13); the spring (3) ensures the tight electrical connection between the wedge-shaped step (11) and the first inner cutter (13) on the first conductor (1) and the second conductor (2).

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