An electrical conversion device

Abstract

The application relates to an electrical conversion device, belonging to the technical field of electrical conversion devices for valve positioners, which comprises a fixed seat, a fixed magnetic flux path generating assembly, a control magnetic flux path generating assembly and a magnetic control elastic movable piece; the fixed magnetic flux path generating assembly is fixed on the fixed seat to form a fixed magnetic field; the control magnetic flux path generating assembly comprises a control magnetic flux path assembly and a control coil, the control magnetic flux path assembly is fixed on the fixed seat, the control coil is arranged on the control magnetic flux path assembly and forms a control magnetic field, and the magnetic field plane of the control magnetic field is arranged perpendicularly to the magnetic field plane of the fixed magnetic field; the magnetic control elastic movable piece is located in an assembly hole and comprises an elastic sheet and a magnetic assembly piece fixed on the elastic sheet. The magnetic control elastic movable piece is connected with the fixed magnetic flux path assembly and the control magnetic flux path assembly into a magnetic flux path, can elastically twist the elastic sheet under the action of corresponding magnetic force, drives the magnetic assembly piece to turn out of the assembly hole to close the nozzle, and achieves the purpose of precisely regulating and controlling the opening degree of the nozzle valve hole.

Description

Technical Field

[0001] This invention relates to the technical field of electrical conversion devices for valve positioners, and particularly to an electrical conversion device. Background Technology

[0002] Intelligent positioners are advanced control devices primarily used for precise control of valve opening in automatic control systems. Utilizing built-in mechanical structures, microprocessors, and advanced algorithms, they receive signals from the control system and convert them into precise operations on the valve actuators. The "heart" of an intelligent positioner is an electrical conversion unit, also known as a torque motor, which generates control signals. Specifically, it converts electrical signals into mechanical motion and then into pneumatic signals.

[0003] However, traditional electrical conversion units suffer from low control precision, slow response speed, short lifespan, and difficulties in assembly and maintenance. Currently, there are many improved solutions for traditional torque motor structures in the patent field. A common approach is to separate the coil (control magnetic field) from the baffle component, as shown in patent CN201110092036, where the coil on the baffle component is moved to the end away from the nozzle. This structure requires an additional spring at the fulcrum in addition to the zero-adjustment spring, which increases the number of springs in the system, thus reducing the system's response speed. Another example is patent CN201621277382, which removes the zero-adjustment spring, resulting in a symmetrical distribution of jet force and electromagnetic force at the nozzle, allowing for a higher response speed. However, this structure is complex, difficult to assemble and maintain, and has a short lifespan.

[0004] Therefore, how to design an electrical conversion device for valve positioners that is simple in structure, low in manufacturing cost, has a long service life and high control accuracy is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides an electrical conversion device that solves the technical problems of short service life and low control accuracy of existing electrical conversion devices.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: an electrical conversion device for controlling the opening and closing of a nozzle, comprising: a fixed base, a fixed magnetic path generating component, a control magnetic path generating component, and a magnetically controlled elastic movable component.

[0007] The mounting base has an assembly hole in the middle; the nozzle is located below the assembly hole; the fixed magnetic path generating assembly is fixed on the mounting base to form a fixed magnetic field surrounding the assembly hole; the control magnetic path generating assembly includes a control magnetic path component and a control coil, the control magnetic path component is fixed on the mounting base, and the control coil is wound on the control magnetic path component to generate a control magnetic field surrounding the assembly hole when energized, the magnetic field plane of the control magnetic field is arranged perpendicular to the magnetic field plane of the fixed magnetic field; the magnetically controlled elastic movable member is located in the assembly hole and is connected to the fixed magnetic path component and the control magnetic path component to form a magnetic path, the magnetically controlled elastic movable member includes a spring piece that can be elastically torn under the action of the fixed magnetic field and the control magnetic field and a magnetic fitting fixed on the spring piece, the spring piece is fixed on the mounting base, and the torn spring piece drives the magnetic fitting to rotate out of the assembly hole to close the nozzle.

[0008] The beneficial effects of this invention are: it changes the traditional control method of using spring regulation in electrical conversion devices, and connects the magnetically controlled elastic movable part with the fixed magnetic path assembly and the control magnetic path assembly to form a magnetic path. Since the magnetic field plane of the control magnetic field is arranged perpendicular to the magnetic field plane of the fixed magnetic field, the elastic twisting of the spring can be achieved under the action of the corresponding magnetic force, driving the magnetic assembly to rotate out of the assembly hole to close the nozzle, thereby achieving the purpose of accurately controlling the opening of the nozzle valve hole.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the fixing base includes two parallel fixing plates, which are detachably connected and have opposing through holes in their middle; the assembly hole consists of the two through holes; the fixed magnetic path generating assembly is fixed on the two fixing plates; the control magnetic path assembly is fixed on the upper fixing plate; and the spring is fixed on the upper fixing plate.

[0011] Furthermore, the fixed magnetic path generating component includes two magnetic strips and two magnets capable of generating a magnetic field. The two magnetic strips are located above and below the magnetic assembly and are respectively fixed to the two fixed plates. The two magnets are located on opposite outer sides of the two fixed plates and are respectively fixed between the corresponding two magnetic strips. The fixed magnetic field is conducted between the two magnetic strips, the magnetic assembly, and the two magnets.

[0012] Furthermore, the control magnetic path assembly includes a magnetic rod and two magnetic pillars. The bottom ends of the two magnetic pillars are fixed at intervals to the top surfaces of the upper fixing plate corresponding to the through holes on both sides. The magnetic rod is arranged along the length direction perpendicular to the magnetic strip plate, and its two ends are respectively fixed to the two magnetic pillars. The control coil is wound around the magnetic rod. The control magnetic field is conducted between the magnetic rod, the two magnetic pillars, and the magnetic assembly.

[0013] Furthermore, the magnetic assembly includes two magnetically conductive clamping plates, two magnetically conductive connecting plates, a connecting post, and two magnetically conductive connecting posts, all located within the assembly hole.

[0014] Two magnetically conductive clamping plates are placed parallel and spaced apart between two magnetically conductive strip plates; the spring piece is a long strip structure and is placed between the two magnetically conductive clamping plates along the length direction of the magnetically conductive strip plates; two magnetically conductive connecting plates are distributed along the length direction perpendicular to the magnetically conductive strip plates, and one end of each plate extends into one end of the two magnetically conductive clamping plates; each of the two magnetically conductive clamping plates has a corresponding fixing hole in its middle, and the spring piece has a mounting hole in its middle that is opposite to the fixing hole; the connecting post passes through the two fixing holes and the mounting hole; each of the two magnetically conductive clamping plates has a magnetically conductive hole on both sides corresponding to its fixing hole, and the two magnetically conductive holes are spaced apart along the length direction perpendicular to the magnetically conductive strip plates; the insertion ends of the two magnetically conductive connecting plates that extend into the two magnetically conductive clamping plates each have a connecting hole that is opposite to the corresponding magnetically conductive hole; the two ends of the two magnetically conductive connecting posts are respectively inserted into the two magnetically conductive holes and move through the corresponding connecting holes;

[0015] The two magnetic connecting plates extend from the protruding ends of the two magnetic strip plates and are magnetically connected to the two magnetic pillars, so as to conduct the original magnetic circuit between the two magnetic clamps and the two magnetic connecting pillars and to conduct the control magnetic circuit between the two magnetic connecting plates, the two magnetic connecting pillars and the two magnetic clamps; both ends of the spring sheet in the length direction are fixed to the upper fixing plate so as to elastically deform the spring sheet and drive the two magnetic clamps and the two magnetic connecting pillars to twist about the length direction of the spring sheet as the axis. After twisting, the magnetic connecting pillars or magnetic clamps rotate out of the receiving hole assembly hole and can press against the valve hole of the nozzle.

[0016] The further beneficial effect of the above is that: first, the fixed magnetic field is conducted between the magnetic clamp and the two magnetic connecting posts, and then the control magnetic field is conducted between the two magnetic connecting posts, the two magnetic connecting posts, and the two magnetic clamps. Since the magnetic field planes of the fixed magnetic field and the control magnetic field circuit are arranged perpendicularly, the spring can be elastically twisted about the length direction of the spring as the axis, thereby driving the two magnetic clamps and the two magnetic connecting posts to deflect about the length direction of the spring as the axis. After deflection, the magnetic connecting posts or magnetic clamps can press against the valve orifice of the nozzle, thereby accurately controlling the opening of the nozzle valve orifice.

[0017] Furthermore, the magnetic assembly also includes two pads, which are respectively located in the gap between the spring and the two magnetically conductive clamps, and each of the two pads has a through hole in the middle; the connecting post passes through the two through holes.

[0018] Furthermore, the magnetic fitting also includes two taps, and threaded holes are provided at both ends of the spring piece along its length; the two taps are respectively threaded into the two threaded holes and their screw-in ends are respectively in contact with the bottom surface of the upper fixing plate.

[0019] The further beneficial effect of adopting the above is that by adjusting the amount of the tap screwed in, the elasticity of the spring can be changed, thereby controlling the magnitude of the reaction force on its torsion, adapting to different working environments, and ensuring the stability of long-term operation.

[0020] Furthermore, the upper fixing plate has a first receiving groove on the bottom plate surface corresponding to both sides of the assembly hole, and the lower fixing plate has a second receiving groove on the top plate surface corresponding to the assembly hole. The two first receiving grooves are respectively arranged opposite to the two second receiving grooves, and the oppositely arranged first receiving grooves and second receiving grooves form a plug-in groove. The two magnetic connecting plates extend out of the two magnetic clamping plates and are respectively inserted into the two plug-in grooves.

[0021] The further beneficial effect of adopting the above is that by inserting the two protruding ends of the two magnetic connecting plates into the two insertion slots respectively, it can prevent the elastic movable parts from falling out of the assembly hole and facilitate the magnetic connection between the two magnetic connecting plates and the two magnetic pillars.

[0022] Furthermore, each of the two fixing plates has a corresponding fixing groove on its outer side along the length of the magnetic strip plate; the two magnets are respectively located in the two corresponding fixing grooves.

[0023] Furthermore, the fixed magnetic path generating component also includes two protective plates, which are respectively located in the two fixed grooves and respectively fixed to the mutually distant end faces of the two magnets.

[0024] Furthermore, it also includes a cover plate located above the upper magnetic strip plate and detachably connected to the top surface of the upper fixing plate. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of an electrical conversion device according to the present invention;

[0026] Figure 2 This is an exploded structural diagram of an electrical conversion device according to the present invention;

[0027] Figure 3 This is a schematic diagram showing the disassembled structure of the fixed base and the elastic movable part in an electrical conversion device of the present invention;

[0028] Figure 4 This is a three-dimensional structural diagram of an elastic movable element in an electrical conversion device according to the present invention;

[0029] Figure 5 This is an exploded structural diagram of an elastic movable element in an electrical conversion device according to the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of an electrical conversion device according to the present invention;

[0031] Figure 7 This is a schematic diagram illustrating a fixed magnetic field in an electrical conversion device according to the present invention;

[0032] Figure 8 This is a schematic diagram illustrating the fixed magnetic field and the control magnetic field in an electrical conversion device of the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Fixing base; 11. Assembly hole; 12. Fixing plate; 121. Through hole; 13. Insertion slot; 14. Fixing slot; 2. Fixing magnetic path generating component; 21. Magnetic guide strip; 22. Magnet; 23. Protective plate; 3. Control magnetic path component; 31. Magnetic guide rod; 32. Magnetic guide column; 4. Magnetic control elastic movable part; 41. Spring; 411. Mounting hole; 42. Magnetic fitting; 421. Magnetic guide clamp; 4211. Fixing hole; 4212. Magnetic guide hole; 422. Magnetic guide connecting plate; 4221. Through hole; 423. Connecting column; 424. Magnetic guide connecting column; 425. Pad; 43. Tap; 5. Nozzle; 6. Cover plate. Detailed Implementation

[0035] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, an electrical conversion device for controlling the opening and closing of a nozzle 5 includes: a fixed base 1, a fixed magnetic path generating assembly 2, a control magnetic path generating assembly, and a magnetically controlled elastic movable element 4.

[0037] The mounting base 1 has an assembly hole 11 in the middle; the nozzle 5 is located below the assembly hole 11; the fixed magnetic path generating assembly 2 is fixed on the mounting base 1 to form a fixed magnetic field around the assembly hole 11; the control magnetic path generating assembly includes a control magnetic path assembly 3 and a control coil. The control magnetic path assembly 3 is fixed on the mounting base 1, and the control coil is wound on the control magnetic path assembly 3 to generate a control magnetic field around the assembly hole 11 when it is energized. The magnetic field plane of the control magnetic field is arranged perpendicular to the magnetic field plane of the fixed magnetic field; the magnetically controlled elastic movable member 4 is located in the assembly hole 11 and is connected to the fixed magnetic path assembly 2 and the control magnetic path assembly 3 to form a magnetic path. The magnetically controlled elastic movable member 4 includes a spring piece 41 that can be elastically torn under the action of the fixed magnetic field and the control magnetic field, and a magnetic accessory 42 fixed on the spring piece 41. The spring piece 41 is fixed on the mounting base 1, and the torn spring piece 41 drives the magnetic accessory 42 to rotate out of the assembly hole 11 and close the nozzle 5.

[0038] like Figure 3 As shown, in some specific embodiments, the fixing base 1 may include two parallel fixing plates 12, which are detachably connected and have opposing through holes 121 in their middle; the mounting hole 11 consists of two through holes 121; the fixing magnetic path generating component 2 is fixed on the two fixing plates 12; the control magnetic path component 3 is fixed on the upper fixing plate 12; and the spring piece 41 is fixed on the upper fixing plate 12.

[0039] like Figure 3 As shown, in some specific embodiments, the fixed magnetic path generating component 2 may include two magnetic strips 21 and two magnets 22 capable of generating a magnetic field. The two magnetic strips 21 are located opposite each other above and below the magnetic assembly 42 and are respectively fixed on two fixed plates 12; the two magnets 22 are located on opposite outer sides of the two fixed plates 12 and are respectively fixed between the corresponding two magnetic strips 21; the fixed magnetic field is conducted between the two magnetic strips 21, the magnetic assembly 42 and the two magnets 22.

[0040] like Figure 1 As shown, the control magnetic path assembly 3 includes a magnetic rod 31 and two magnetic pillars 32. The bottom ends of the two magnetic pillars 32 are fixed at intervals on the top surfaces of the upper fixing plate 12 corresponding to the through holes 121. The magnetic rod 31 is arranged along the length direction perpendicular to the magnetic strip plate 21 and its two ends are respectively fixed on the two magnetic pillars 32. The control coil is wound on the magnetic rod 31. The control magnetic field is conducted between the magnetic rod 31, the two magnetic pillars 32 and the magnetic assembly 42.

[0041] like Figure 4 and 5 As shown, in some specific embodiments, the magnetic assembly 42 may include two magnetically conductive clamping plates 421, two magnetically conductive connecting plates 422, a connecting post 423, and two magnetically conductive connecting posts 424, all located within the assembly hole 11.

[0042] Two magnetic clamping plates 421 are placed parallel to each other between two magnetic strip plates 21; a spring piece 41 is a long strip structure and is placed between the two magnetic clamping plates 421 along the length direction of the magnetic strip plate 21; two magnetic connecting plates 422 are distributed along the length direction perpendicular to the magnetic strip plate 21 and one end of each plate extends into one end of the two magnetic clamping plates 421; the two magnetic clamping plates 421 have opposite fixing holes 4211 in the middle, and the spring piece 41 has a mounting hole 411 opposite to the fixing hole 4211 in the middle, and the connecting post 423 is fixed through it. The two fixing holes 4211 and the mounting holes 411 are respectively provided with magnetic holes 4212 on both sides of the fixing holes 4211. The two magnetic holes 4212 are distributed at intervals along the length direction perpendicular to the magnetic strip plate 21. The two magnetic connecting plates 422 are provided with through holes 4221 corresponding to the magnetic holes 4212 at their insertion ends. The two magnetic connecting posts 424 are respectively inserted into the two magnetic holes 4212 and move through the corresponding through holes 4221.

[0043] Two magnetic connecting plates 422 extend from the protruding ends of two magnetic strip plates 21 and are magnetically connected to two magnetic pillars 32 respectively, so as to conduct a fixed magnetic field between the two magnetic clamps 421 and the two magnetic connecting pillars 424 and conduct a control magnetic field between the two magnetic connecting plates 422, the two magnetic connecting pillars 424 and the two magnetic clamps 421; both ends of the spring piece 41 in the length direction are fixed on the upper fixed plate 12, so that under the action of the fixed magnetic field and the control magnetic field, the spring piece 41 is elastically twisted about the length direction of the spring piece 41 as the axis, driving the two magnetic clamps 421 and the two magnetic connecting pillars 424 to deflect in the same direction. After deflection, the magnetic connecting pillars 424 or magnetic clamps 421 rotate out of the receiving hole assembly hole 11 and can press against the valve hole of the nozzle 5.

[0044] like Figure 4 and Figure 5 As shown, in some specific embodiments, the magnetic assembly 42 may also include two pads 425, which are respectively located in the gap between the spring piece 41 and the two magnetic clamping plates 421, and each of the two pads 425 has a connecting hole in the middle; the connecting post 423 passes through the two connecting holes.

[0045] like Figure 5 As shown, in some specific embodiments, the magnetically controlled elastic movable part 4 also includes two taps 43, and the two ends of the spring piece 41 in the length direction are respectively provided with threaded holes; the two taps 43 are respectively threaded into the two threaded holes and their screw-in ends are respectively in contact with the bottom surface of the upper fixing plate 12.

[0046] like Figure 1 , Figure 2 and Figure 3As shown, in some specific embodiments, the upper fixing plate 12 can be provided with a first receiving groove on the bottom plate surface on both sides of the mounting hole 11, and the lower fixing plate 12 can be provided with a second receiving groove on the top plate surface of the mounting hole 11. The two first receiving grooves are respectively arranged opposite to the two second receiving grooves, and the oppositely arranged first receiving grooves and second receiving grooves form a plug-in groove 13; the two magnetic connecting plates 422 extend out of the two protruding ends of the two magnetic clamping plates 421 and are respectively inserted into the two plug-in grooves 13.

[0047] like Figure 1 and Figure 2 As shown, in some specific embodiments, the two fixing plates 12 can be provided with opposite fixing grooves 14 on both outer sides of the magnetic strip plate 21 along the length direction; the two magnets 22 are respectively located in the two opposite fixing grooves 14.

[0048] like Figure 1 and Figure 2 As shown, in some specific embodiments, the fixed magnetic path generating component 2 may also include two protective plates 23, which are respectively located in two fixed grooves 14 and respectively fixed to the end faces of the two magnets 22 that are far apart from each other.

[0049] like Figure 1 and Figure 2 As shown, in some specific embodiments, a cover plate is also included, which is located above the upper magnetic strip plate and is detachably connected to the top surface of the upper fixing plate.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electrical conversion device for controlling the opening and closing of a nozzle (5), characterized in that, include: A fixing base (1) is provided with an assembly hole (11) in the middle; the nozzle (5) is located below the assembly hole (11); A fixed magnetic path generating component (2) is fixed on the fixed base (1) to form a fixed magnetic field around the mounting hole (11); A control magnetic path generating component, comprising a control magnetic path component (3) and a control coil, wherein the control magnetic path component (3) is fixed on the fixed base (1), and the control coil is wound on the control magnetic path component (3) to generate a control magnetic field surrounding the mounting hole (11) when energized, wherein the magnetic field plane of the control magnetic field is arranged perpendicular to the magnetic field plane of the fixed magnetic field. A magnetically controlled elastic movable component (4) is located inside the mounting hole (11) and connected to the fixed magnetic path generating component (2) and the control magnetic path component (3) to form a magnetic path. The magnetically controlled elastic movable component (4) includes a spring piece (41) that can be elastically twisted under the action of the fixed magnetic field and the control magnetic field, and a magnetic fitting (42) fixed on the spring piece (41). The spring piece (41) is fixed on the fixed base (1), and the twisted spring piece (41) drives the magnetic fitting (42) to rotate out of the mounting hole (11) and close the nozzle (5). The mounting base (1) includes two parallel mounting plates (12), which are detachably connected and have opposing through holes (121) in their middle; the mounting holes (11) are the two through holes (121); the fixed magnetic path generating assembly (2) is fixed on the two mounting plates (12); the control magnetic path assembly (3) is fixed on the upper mounting plate (12); the spring piece (41) is fixed on the upper mounting plate (12); The fixed magnetic path generating component (2) includes two magnetic strips (21) and two magnets (22) capable of generating a magnetic field. The two magnetic strips (21) are positioned above and below the magnetic assembly (42) and are respectively fixed on the two fixed plates (12). The two magnets (22) are located on opposite sides of the two fixed plates (12) and are respectively fixed between the corresponding two magnetic strips (21). The fixed magnetic field is conducted between the two magnetic strips (21), the magnetic assembly (42), and the two magnets (22). The control magnetic path assembly (3) includes a magnetic rod (31) and two magnetic posts (32). The bottom ends of the two magnetic posts (32) are fixed at intervals on the top surfaces of the upper fixing plate (12) corresponding to its through holes (121). The magnetic rod (31) is arranged along the length direction perpendicular to the magnetic strip plate (21) and its two ends are respectively fixed on the two magnetic posts (32). The control coil is wound on the magnetic rod (31). The control magnetic field is connected between the magnetic rod (31), the two magnetic posts (32) and the magnetic fitting (42). The magnetic assembly (42) includes two magnetic clamping plates (421), two magnetic connecting plates (422), a connecting post (423), and two magnetic connecting posts (424), all located within the assembly hole (11). Two magnetic clamping plates (421) are placed parallel to each other between two magnetic strip plates (21); the spring piece (41) is a long strip structure and is placed between the two magnetic clamping plates (421) along the length direction of the magnetic strip plate (21); two magnetic connecting plates (422) are distributed along the length direction perpendicular to the magnetic strip plate (21) and one end of each plate extends into one end of the two magnetic clamping plates (421); the two magnetic clamping plates (421) are provided with opposite fixing holes (4211) in the middle, and the spring piece (41) is provided with mounting holes (411) opposite to the fixing holes (4211) in the middle, and the connecting post (423) is inserted through it. Within the two fixing holes (4211) and the mounting hole (411); the two magnetic clamping plates (421) are respectively provided with magnetic holes (4212) on both sides of their fixing holes (4211), the two magnetic holes (4212) are distributed at intervals along the length direction perpendicular to the magnetic strip plate (21), and the two magnetic connecting plates (422) extending into the two magnetic clamping plates (421) are each provided with a through hole (4221) opposite to the corresponding magnetic hole (4212); the two ends of the two magnetic connecting columns (424) are respectively inserted into the two magnetic holes (4212) and move through the corresponding through hole (4221). The two magnetic connecting plates (422) extend from the two magnetic strip plates (21) and are magnetically connected to the two magnetic pillars (32) respectively, so as to conduct the fixed magnetic field between the two magnetic clamps (421) and the two magnetic connecting pillars (424) and conduct the control magnetic field between the two magnetic connecting plates (422), the two magnetic connecting pillars (424) and the two magnetic clamps (421); the two ends of the spring piece (41) in the length direction are fixed on the upper fixed plate (12) so as to elastically twist the spring piece (41) with the length direction of the spring piece (41) as the axis under the action of the fixed magnetic field and the control magnetic field, driving the two magnetic clamps (421) and the two magnetic connecting pillars (424) to deflect in the same direction. After deflection, the magnetic connecting pillars (424) or the magnetic clamps (421) rotate out of the assembly hole (11) and can press against the valve hole of the nozzle (5); The magnetic fitting (42) also includes two pads (425), which are located in the gap between the spring piece (41) and the two magnetic clamps (421), and each of the two pads (425) has a connecting hole in the middle; the connecting post (423) passes through the two connecting holes. The magnetically controlled elastic movable part (4) also includes two taps (43), and the two ends of the spring piece (41) in the length direction are respectively provided with threaded holes; the two taps (43) are respectively threaded into the two threaded holes and their screw-in ends are respectively in contact with the bottom surface of the upper fixing plate (12).

2. The electrical conversion device according to claim 1, characterized in that, The upper fixing plate (12) is provided with a first receiving groove on the bottom plate surface on both sides of the assembly hole (11), and the lower fixing plate (12) is provided with a second receiving groove on the top plate surface of the assembly hole (11). The two first receiving grooves are respectively arranged opposite to the two second receiving grooves, and the oppositely arranged first receiving grooves and second receiving grooves form a plug-in groove (13). The two magnetic connecting plates (422) extend out of the two magnetic clamping plates (421) and are respectively inserted into the two plug-in grooves (13).

3. The electrical conversion device according to claim 1, characterized in that, The two fixing plates (12) are provided with opposite fixing grooves (14) on both outer sides of the magnetic strip plate (21) along the length direction; the two magnets (22) are respectively located in the two opposite fixing grooves (14).

4. An electrical conversion device according to claim 3, characterized in that, The fixed magnetic path generating component (2) also includes two protective plates (23), which are located in the two fixed grooves (14) and fixed to the opposite ends of the two magnets (22).

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