A flexible reactor

Abstract

A flexible reactor, which comprises a lower insulating plate, a coil assembly, a buffer assembly, and an upper insulating plate. The coil assembly includes a coil, an elastic filler, and a fiber tape. When subjected to electrodynamic force, the elastic filler absorbs impact energy through elastic deformation, reduces the force on the wire, and can play a role in energy absorption by deformation. A plurality of the buffer assemblies are staggered and arranged on the inner side and the outer side of the coil. The buffer assembly includes a kidney-shaped hole, a fixing column, a buffer column, and a compression nut. The extending direction of the kidney-shaped hole is parallel to the diameter direction of the coil, and two of the buffer columns are arranged in each of the kidney-shaped holes, and the two buffer columns are respectively located on both sides of the screw column. When subjected to electrodynamic force, the impact energy can be directly transferred from the coil to the buffer column in the buffer assembly, and through the cooperation of the buffer column and the kidney-shaped hole, the buffer column absorbs the impact energy through compression deformation, and converts the mechanical impact into compression potential energy.

Description

Technical Field

[0001] The invention relates to the field of electric power equipment, and in particular to a flexible reactor. Background Art

[0002] As the third generation of direct current transmission technology, flexible direct current transmission technology is based on voltage source converters. It has the advantages of no need for reactive power compensation, small footprint, and no commutation failure, and has been widely used in UHV projects. As the core component of the flexible direct current converter valve, the reactor needs to assume key functions such as filtering, current limiting, and voltage mutation suppression.

[0003] The basic structure of the reactor in the prior art is a hollow self-cooling reactor composed of a single coil wound with copper wire. When a large current passes through the reactor coil, the coil will generate an outward expansion force in the axial and radial directions due to the effect of the electromotive force, and the radial force will always exist regardless of whether the coil is rectangular, elliptical, circular or other special shapes. It cannot be eliminated from the structure, resulting in the axial and radial electromotive forces easily causing the coil to deform or even break when a large current passes through. At the same time, the reactor in the prior art has weak impact resistance, lacks an effective energy buffering mechanism, and is difficult to absorb instantaneous large current impacts. Summary of the invention

[0004] In view of this, the present invention provides a flexible reactor to solve the above technical problems.

[0005] A flexible reactor, comprising a lower insulating plate, a coil assembly arranged on the lower insulating plate, a plurality of buffer assemblies arranged on the lower insulating plate, and an upper insulating plate arranged on the coil assembly, the coil assembly comprising a coil, an elastic filler arranged on the coil, and a fiber band wound on the coil, the coil being formed by spirally radially winding a copper wire, each of the coils being arranged at intervals with a certain gap, the elastic filler being arranged in the gap between each of the coils, a plurality of buffer assemblies being staggeredly arranged on the inner and outer sides of the coil, the buffer The component includes two waist-shaped holes respectively arranged on the lower insulating plate and the upper insulating plate, a fixing column arranged on the waist-shaped hole, four buffer columns respectively arranged in pairs in the waist-shaped holes, and two clamping nuts for fixing the two ends of the fixing columns. The extension direction of the waist-shaped hole is parallel to the diameter direction of the coil. The side wall of the fixing column is welded to the coil. A screw column is respectively arranged at both ends of the fixing column. The screw column passes through the waist-shaped hole and is used to set the clamping nut. Two buffer columns are arranged in each waist-shaped hole, and the two buffer columns are respectively located on both sides of the screw column.

[0006] Furthermore, the flexible reactor further includes an incoming line row disposed on the coil assembly and an outgoing line row disposed on the coil assembly.

[0007] Furthermore, the incoming line row is connected to the inner side of the coil, the outgoing line row is connected to the outer side of the coil, and the incoming line row and the outgoing line row serve as a current input interface and an output interface respectively.

[0008] Furthermore, the incoming line row and the outgoing line row are respectively located at two ends of the coil and are arranged in a straight line.

[0009] Furthermore, the buffer assembly is also provided on the incoming line row and the outgoing line row.

[0010] Furthermore, the buffer post is made of an elastic material.

[0011] Furthermore, the diameter of the fixing post is larger than the size of the waist-shaped hole, so that the fixing post presses the buffer post in the waist-shaped hole.

[0012] Compared with the prior art, the flexible reactor provided by the present invention sets the elastic filler in the gap between each coil, and forms an overall constraint layer by uniformly winding the fiber tape on the outer side wall of the coil, so that the coils of the reactor form an integral body, and each coil is closely attached to the elastic filler. When the elastic filler is subjected to electrodynamic force, it absorbs impact energy through elastic deformation, reduces the force on the wire, and can play a role in deforming and absorbing energy. The screw columns at both ends of the fixing post are arranged in the waist-shaped hole and are connected by a compression nut. Two buffer posts are arranged in each waist-shaped hole, and the two buffer posts are respectively located on both sides of the screw column. The extending direction of the waist-shaped hole is parallel to the diameter direction of the coil. When subjected to electrodynamic force, the impact energy can be directly transmitted from the coil to the buffer post in the buffer assembly. Through the cooperation of the buffer post and the waist-shaped hole, the buffer post absorbs the impact energy through compression deformation and converts the mechanical impact into compression potential energy. In summary, through the elastic filler, the buffer device, and the fiber tape, a multi-stage elastic potential energy absorption buffer is formed, which is controllable within the flexible variable range, can effectively protect the structural stability of the reactor body, and play a role in buffering and explosion prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic exploded view of a flexible reactor provided by the present invention.

[0014] Figure 2 is Figure 1 a schematic structural view of the flexible reactor removing the upper insulating plate and the fiber tape.

[0015] Figure 3For Figure 1 Partial cross-sectional view of the flexible reactor.

[0016] Figure 4 For Figure 1 Top view of the flexible reactor with waist-shaped holes, buffer columns, and threaded columns. Specific implementation mode

[0017] The following further elaborates on the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not used to limit the protection scope of the present invention.

[0018] As Figures 1 to 4 shown, it is a schematic structural diagram of the flexible reactor provided by the present invention. The flexible reactor includes a lower insulating plate 10, a coil assembly 20 disposed on the lower insulating plate 10, an incoming line row 30 disposed on the coil assembly 20, an outgoing line row 40 disposed on the coil assembly 20, a plurality of buffer assemblies 50 disposed on the lower insulating plate 10, and an upper insulating plate 60 disposed on the coil assembly 20. It can be imagined that the flexible reactor also includes some other functional modules, such as connection components, etc., which are well-known technologies to those skilled in the art and will not be elaborated herein.

[0019] The lower insulating plate 10 and the upper insulating plate 60 serve as the support frames of the reactor, used to fix the coil assembly 20 and the buffer assembly 50, ensure structural stability, and at the same time provide electrical insulation to prevent current leakage or short circuit.

[0020] The coil assembly 20 includes a coil 21, an elastic filler 22 disposed on the coil 21, and a fiber tape 23 wound around the coil 21.

[0021] The coil 21 is spirally wound radially by a copper wire with a rectangular cross-section. A certain gap needs to be left between each coil 21. The axial force of the single-layer coil is zero, eliminating the axial electrodynamic force. The coil only receives force in the radial direction, reducing the risk of structural deformation. The rectangular cross-section of the copper wire results in a larger cross-sectional area. The large cross-section can meet the current-carrying capacity of large currents, enabling the wire to withstand greater current impacts and having higher mechanical strength. The copper material provides good ductility and toughness, reducing the risk of its fracture under force.

[0022] The elastic filler 22 is disposed in the gap between each coil 21. The elastic filler 22 is used to isolate adjacent coils 21, prevent inter-turn short circuit, can play an electrical insulation role, and can also absorb impact energy through elastic deformation, reduce the force on the wire, and can play a role in energy absorption by deformation.

[0023] The fiber tape 23 is evenly wound around the outer wall of the coil 21 to form an integral restraint layer, so that the coil 21 of the reactor forms a whole, thereby restricting the radial displacement of local wires, dispersing the impact force, and preventing structural damage caused by local stress concentration. At the same time, multiple coils 21 are also tied tightly, so that each coil 21 is in close contact with the elastic filler 22, so that the elastic filler 22 can better play the role of absorbing impact energy.

[0024] The incoming line row 30 is connected to the inner side of the coil 21, and the outgoing line row 40 is connected to the outer side of the coil 21. The incoming line row 30 and the outgoing line row 40 serve as current input interfaces and output interfaces respectively to connect to an external circuit. The incoming line row 30 and the outgoing line row 40 are respectively located at both ends of the coil 21 and arranged in a straight line, and the positions are designed at both ends of the reactor to reduce the electromagnetic force interference when a large current passes through.

[0025] Multiple buffer components 50 are staggered on the inner and outer sides of the coil 21, and the buffer components 50 are also arranged on the incoming line row 30 and the outgoing line row 40, so as to ensure the uniformity of the buffer positions. The buffer component 50 includes two waist-shaped holes 51 respectively arranged on the lower insulating plate 10 and the upper insulating plate 60, a fixing column 52 arranged on the waist-shaped hole 51, four buffer columns 53 respectively arranged in pairs in the waist-shaped hole 51, and two pressing nuts 54 for fixing both ends of the fixing column 52.

[0026] The extending direction of the waist-shaped hole 51 is parallel to the diameter direction of the coil 21. Since the coil is only stressed radially, the waist-shaped hole 51 can provide a moving distance in the diameter direction, so that after the buffer column 53 is arranged, the impact energy can be absorbed through compression deformation, and at the same time, the displacement range of the buffer column 53 is restricted to ensure that the buffer process is controllable and avoid excessive deformation.

[0027] The side wall of the fixing column 52 is welded to the coil 21, so as to be welded into a whole with the coil 21, so that the buffer component 50 and the coil 21 form a rigid connection, avoiding separation of the two due to mechanical vibration or electromagnetic force during a large current impact, and ensuring that the buffer component 50 can stably transmit the impact force. Welding makes the contact surface between the buffer component 50 and the coil 21 have no gap, and the impact energy can be directly transmitted from the coil 21 to the buffer column 53 in the buffer component 50, improving the energy absorption efficiency. Through the cooperation of the buffer column 53 and the waist-shaped hole 51, the mechanical impact is converted into compression potential energy. It can be imagined that when the fiber tape 23 is wound, it will avoid the positions that need to be welded on the coil 21 to prevent the fiber tape 23 from affecting the connection.

[0028] A screwing post 55 is respectively arranged at both ends of the fixing post 52. The screwing post 55 passes through the waist-shaped hole 51 and is used to set the compression nut 54, so that both ends of the fixing post 52 are respectively connected to the lower insulating plate 10 and the upper insulating plate 60.

[0029] Two buffer posts 53 are arranged in each waist-shaped hole 51. The two buffer posts 53 are respectively located on both sides of the screwing post 55. The buffer posts 53 are made of elastic materials and absorb impact energy through compression deformation, playing a role in absorbing and buffering. The diameter of the fixing post 52 is larger than the size of the waist-shaped hole 51, so that the fixing post 52 presses the buffer posts 53 in the waist-shaped hole 51, and thus the movement range of the buffer posts 53 is limited within the waist-shaped hole 51 by the compression nut 54 and the fixing post 52.

[0030] When a large impact current enters the inner ring of the coil 21 from the incoming line row 30, the wire inside the coil 21 is forced to move outward. At this time, the buffer assembly 50 located inside the coil 21 will hold the coil moving outward and provide a reverse supporting force. At the same time, the elastic packing material 22 located between each coil 21 is forced to compress and deform, absorbing part of the impact force. When the electrodynamic force acts on a wire in the middle of the coil 21, the elastic packing material 22 outside the wire is forced to compress and deform, playing a buffering role. When the electrodynamic force acts on the outermost wire of the coil 21, the buffer assembly 50 located outside will resist the coil moving outward at this time, and also provide a reverse supporting force, playing a certain protective role for the coil 21. At the same time, the fiber tape 23 is evenly wound around the entire coil 21. When a wire is forced to displace outward, it will transfer the force to the entire coil 21, and then transfer it to the buffer assemblies 50 on the inner and outer sides. By absorbing the radial electrodynamic force impact, through the cooperation of the buffer post 53 and the waist-shaped hole 51, the mechanical impact is converted into compression potential energy.

[0031] Compared with the prior art, the flexible reactor provided by the present invention arranges the elastic filler 22 in the gap between each of the coils 21, and the fiber tape 23 is evenly wound on the outer wall of the coil 21 to form an overall constraint layer, so that the coils 21 of the reactor form a whole, and each of the coils 21 is closely attached to the elastic filler 22. When subjected to the action of electric force, the elastic filler 22 absorbs impact energy through elastic deformation, reduces the force on the wire, and can play a deformation energy absorption role. The screw columns 55 at both ends of the fixing column 52 are arranged in the waist-shaped hole 51 and connected by a clamping nut 54. Two buffer columns 53 are arranged in each waist-shaped hole 51. The two buffer columns 53 are respectively located on both sides of the screw column 55. The extension direction of the waist-shaped hole 51 is parallel to the diameter direction of the coil 21. When subjected to the action of electric force, the impact energy can be directly transferred from the coil 21 to the buffer column 53 in the buffer assembly 50. Through the cooperation between the buffer column 53 and the waist-shaped hole 51, the buffer column 53 absorbs the impact energy through compression deformation, and converts the mechanical impact into compression potential energy. In summary, the elastic filler 22, the buffer assembly 50, and the fiber belt 23 form a multi-level elastic potential energy absorption buffer, which is controllable within the flexible variable range, can effectively protect the structural stability of the reactor body, and play a buffering and explosion-proof effect.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A flexible reactor, characterized in that: The flexible reactor includes a lower insulating plate, a coil assembly disposed on the lower insulating plate, a plurality of buffer assemblies disposed on the lower insulating plate, and an upper insulating plate disposed on the coil assembly. The coil assembly includes a coil, an elastic filler disposed on the coil, and a fiber tape wound around the coil. The coil is spirally wound radially by a copper wire, and a certain gap is reserved between each coil. The elastic filler is disposed in the gap between each coil. The plurality of buffer assemblies are staggered on the inner and outer sides of the coil. The buffer assembly includes two waist-shaped holes respectively disposed on the lower insulating plate and the upper insulating plate, a fixing column disposed on the waist-shaped hole, four buffer columns respectively disposed in pairs in the waist-shaped hole, and two pressing nuts for fixing both ends of the fixing column. The extending direction of the waist-shaped hole is parallel to the diameter direction of the coil. The side wall of the fixing column is welded to the coil. A screw post is respectively disposed at both ends of the fixing column. The screw post passes through the waist-shaped hole and is used to dispose the pressing nut. Two buffer columns are disposed in each waist-shaped hole, and the two buffer columns are respectively located on both sides of the screw post.

2. The flexible reactor according to claim 1, wherein: The flexible reactor further includes an incoming line row disposed on the coil assembly, and an outgoing line row disposed on the coil assembly.

3. The flexible reactor according to claim 2, characterized in that: The incoming line row is connected to the inner side of the coil, and the outgoing line row is connected to the outer side of the coil. The incoming line row and the outgoing line row serve as current input interfaces and output interfaces respectively.

4. The flexible reactor according to claim 2, wherein: The incoming line row and the outgoing line row are respectively located at both ends of the coil and are arranged in a straight line.

5. The flexible reactor according to claim 2, characterized in that: The buffer assemblies are also disposed on the incoming line row and the outgoing line row.

6. The flexible reactor according to claim 1, wherein: The buffer column is made of an elastic material.

7. The flexible reactor according to claim 1, characterized in that: The diameter of the fixing column is larger than the size of the waist-shaped hole, so that the fixing column presses the buffer column in the waist-shaped hole.

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