Rectifying and reversing structure of impulse voltage generator

Abstract

The utility model discloses a rectification commutation structure of an impulse voltage generator. Comprising a rotating seat stand and a clamping piece arranged on the rotating seat stand. The rotating seat stand comprises a base and a connecting seat arranged at the top of the base; the section of the connecting base is of a trapezoidal structure, and a first connecting part and a second connecting part are arranged between the bottom of the connecting base and the base. The first connecting part is positioned in the centers of the connecting seat and the base; the second connecting part is positioned on the outer side of the first connecting part; the clamping piece is detachably connected to the top of the connecting base. The first connecting part and the second connecting part are arranged between the connecting seat and the base, the whole vertical section of the connecting seat is of a trapezoidal structure and is in a big-end-down shape, and the second connecting part is located on the outer side of the first connecting part, so that connection between the connecting seat and the base is increased, stress of the first connecting part is dispersed to the second connecting part, and the stress of the second connecting part is reduced; and while stable connection is realized, the problem that the connecting seat and the base are eccentric after a single rotating joint is abraded is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of impulse voltage generators, in particular to a rectification and commutation structure of an impulse voltage generator. Background Art

[0002] An impulse voltage generator is a high-voltage generator that generates pulse waves. It is often used to study the insulation performance of electrical equipment subjected to operational overvoltage. To test the overvoltage insulation performance of electrical equipment under positive polarity conditions, the diodes need to be reversed. A related technique employs a rotatable diode group mounted on an insulating plate. The rotating ends of the diode group are alternately electrically connected between the half-wave rectifier output and the ground terminal. Copper plates are provided at the half-wave rectifier output and the ground terminal, and the copper plates abut the rotating ends of the diode group for testing. During testing, the diode group is typically fixed to a strip-shaped mounting plate that is rotatably connected to the insulating plate. The rotating connection between the strip-shaped mounting plate and the insulating plate is achieved solely through bearings and a rotating shaft. Due to the weight of the diode group, after a period of use, clearance between the mating surfaces of the rotating shaft and the bearing can occur, leading to relative sliding between the mating surfaces. Continued wear of the bearing can also cause gradual damage to the bearing components, ultimately leading to a loss of bearing dimensional accuracy. This can cause the rotating shaft and bearing to become non-concentric, resulting in deflection during rotation. This can lead to unstable contact between the arc-shaped conductive member and the arc-shaped abutment member, compromising the stability of the electrical connection and affecting the test results. Summary of the Invention

[0003] In view of this, the present application provides a rectifier commutation structure for an impulse voltage generator, which is used to solve the problem in the prior art that, during an overvoltage insulation performance test, the strip-shaped fixing plate that fixes the diode is rotatably connected to the insulating plate through a bearing and a rotating shaft. This results in a gap between the mating surfaces of the rotating shaft and the bearing after a period of use, causing the rotating shaft and the bearing to be non-concentric, resulting in deflection during rotation, thereby making the contact between the arc-shaped conductive member and the arc-shaped abutment member unstable, affecting the test results. The specific solution is as follows:

[0004] The impulse voltage generator rectifying and reversing structure comprises: a rotating base and a clamping member arranged on the rotating base;

[0005] The rotating seat includes: a base and a connecting seat arranged on the top of the base;

[0006] The cross-section of the connecting seat is a trapezoidal structure, and a first connecting portion and a second connecting portion are respectively provided between the bottom of the connecting seat and the base, and the connecting seat and the base are rotatably connected through the first connecting portion and the second connecting portion;

[0007] The first connecting portion is located at the center of the connecting seat and the base respectively, and the second connecting portion is located on the outside of the first connecting portion and is arranged in a reverse direction along the circumference of the first connecting portion;

[0008] The clamping piece is detachably connected to the top of the connecting seat.

[0009] Preferably, the first connecting portion includes correspondingly arranged limiting columns and limiting grooves;

[0010] The limiting column and the limiting groove are respectively located at the bottom of the connecting seat and the top of the bottom;

[0011] The top end of the limiting column is connected to the connecting seat, and the bottom end of the limiting column is inserted into the limiting groove.

[0012] Preferably, the second connecting portion includes an annular limiting groove, a first annular groove correspondingly arranged at the bottom of the connecting seat, and a second annular groove arranged in the annular limiting groove;

[0013] The first annular groove and the second annular groove are respectively located on the circumference of the first connecting portion, and their cross sections are respectively arc-shaped;

[0014] The peripheral side of the bottom of the connecting seat is movably connected to the annular limiting groove;

[0015] An annular support frame is provided between the first annular groove and the second annular groove, and the annular support frame and the peripheral sides of the bottom of the connecting seat are respectively slidably connected to the side walls on both sides of the annular limiting groove, and limiting holes are evenly provided on the annular support frame, and load-bearing steel balls are provided in the limiting holes;

[0016] The load-bearing steel balls are movably connected to the annular support frame, the first annular groove and the second annular groove respectively.

[0017] Preferably, the distance between the first annular groove and the second annular groove is greater than the load-bearing steel ball.

[0018] Preferably, the annular limiting groove is filled with lubricating oil.

[0019] Preferably, the clamping member includes a connecting portion and a clamping portion;

[0020] The connecting portion is a rod-shaped structure, the connecting portion is inserted into the connecting seat, and a supporting portion is provided on the top of the connecting portion;

[0021] The supporting portion includes a mounting plate, the mounting plate is horizontally connected to the top end of the connecting portion, and a supporting bracket is provided on the mounting plate along the extension direction;

[0022] The bottom of the support bracket is connected to the mounting plate;

[0023] The clamping member is movably connected to the top of the supporting bracket.

[0024] Preferably, limit plates are respectively provided on the tops of both ends of the support bracket;

[0025] The limiting plates are respectively connected to the supporting brackets.

[0026] Preferably, a plurality of vertical limiting protrusions are provided on the outer side of the connecting portion;

[0027] A penetrating connecting hole is provided at the center of the connecting seat along the axial direction, and a vertical limiting groove matching the limiting protrusion is provided on the inner side of the connecting seat;

[0028] The limiting protrusion is inserted into the limiting groove.

[0029] Preferably, the clamping portion includes a driving screw and a first clamping plate and a second clamping plate provided on the driving screw;

[0030] The bottoms of one ends of the first clamping plate and the second clamping plate are respectively inserted into the supporting bracket and slide along the extension direction of the supporting bracket. The first clamping plate and the second clamping plate are respectively threadedly connected to the driving screw. The other ends of the first clamping plate and the second arc-shaped clamping plate form a clamping angle. The first clamping plate and the second clamping plate are respectively provided with internal threads matching the threads of the driving screw, and the directions of the internal threads of the first clamping plate and the second clamping plate are opposite.

[0031] Preferably, the top of the installation is provided with a slide groove;

[0032] One end of the first and second clamping plates inserted into the support bracket is provided with a slider matching the slide groove;

[0033] The sliders are connected to the bottom ends of the first clamping plate and the second clamping plate respectively, and the sliders are slidably connected to the sliding grooves respectively.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] The present application fixes the clamping member by setting a connecting seat, and realizes the clamping member for fixing the strip mounting plate of the diode group by respectively setting a first connecting part and a second connecting part between the connecting seat and the base. When the test is carried out, due to the change of current, the diode group and the strip mounting plate rotate synchronously to realize the alternating electrical connection between the rotating ends of the diode group and the ground end, so that the test can be carried out. In the present application, the vertical cross-section of the connecting seat is a trapezoidal structure as a whole, in which the upper bottom is located at the top, that is, it is small at the top and large at the bottom, and the second connecting part is located on the outside of the first connecting part, and while increasing the connection surface between the connecting seat and the base, The force of the first connecting part is dispersed to the second connecting part, which achieves a stable connection and prevents the problem of eccentricity between the connecting seat and the base due to wear of a single rotating connection. This solves the problem that in the prior art, the rotating connection between the strip mounting plate and the insulating plate is only achieved through bearings and rotating shafts. When a gap is generated between the mating surfaces of the rotating shaft and the bearing, relative sliding occurs between the mating surfaces, or continuous wear of the bearing will cause gradual damage to the bearing parts, and eventually lead to loss of bearing dimensional accuracy, resulting in non-concentricity between the rotating shaft and the bearing, deflection during rotation, and unstable abutment between the arc-shaped conductive part and the arc-shaped abutment part, which is not conducive to achieving the stability of the electrical connection and affects the effect of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural diagram of the rectification and commutation structure of the impulse voltage generator in the embodiment of the present application;

[0037] Figure 2 This is a structural diagram of a clamping member in a rectification and commutation structure of an impulse voltage generator in an embodiment of the present application;

[0038] Figure 3 A side view of a clamping member in a rectification and commutation structure of an impulse voltage generator according to an embodiment of the present application;

[0039] Figure 4 This is a schematic diagram of the connection between the connector and the base in the rectification and commutation structure of the impulse voltage generator in the embodiment of the present application;

[0040] In the figure: 1. Base; 2. Connecting seat; 3. Connecting part; 4. Driving screw; 5. First splint; 6. Support bracket; 7. Limiting protrusion; 8. Slide groove; 9. Limiting plate; 10. Limiting groove; 11. Load-bearing steel ball; 12. Annular support frame; 13. First annular groove; 14. Second annular groove; 15. Annular limiting groove. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] See also Figure 1-4 The utility model provides a rectification and commutation structure of an impulse voltage generator. It comprises a base 1, a connecting base 2 and a clamping member arranged in sequence from bottom to top;

[0043] A limiting groove 10 is provided at the top center of the base 1, and an annular limiting groove 15 is provided at the top of the base 1 near the periphery. The limiting groove 10 (whose cross-section is circular) is located at the center of the annular limiting groove 15; the second annular groove 14 is located at the center of the annular limiting groove 15.

[0044] A limiting column matching the limiting groove 10 is provided at the bottom center of the connecting seat 2, one end of the limiting column is connected to the bottom of the connecting seat 2, and the other end of the limiting column is inserted into the limiting groove 10; the outer periphery of the bottom of the connecting seat 2 is an annular protrusion structure protruding axially toward the bottom, and the annular protrusion structure is inserted into the annular limiting groove 15 and is set in a gap with the bottom of the annular limiting groove 15, and the two sides are respectively slidably connected to the annular limiting groove 15.

[0045] The annular protrusion is inserted into the annular limiting groove 15, and a first annular groove 13 is provided at the end corresponding to the second annular groove 14. An annular support frame 12 is provided between the first annular groove 13 and the second annular groove 14. The annular support frame 12 is located in the annular limiting groove 15. The annular support frame 12 is parallel to the base 1. The annular support frame 12 has an overall circular ring structure. The inner ring and outer ring of the annular support frame 12 are respectively slidably connected to the two groove walls of the annular limiting groove 15.

[0046] A plurality of limiting holes are evenly arranged on the annular support frame 12, wherein the load-bearing steel balls 11 are located in the limiting holes and pass through the limiting holes. The load-bearing steel balls 11 are provided with gaps between the limiting holes and the first annular groove 13 and the second annular groove 14, respectively, for realizing a rotational connection with the base 1 of the connecting seat 2;

[0047] In one embodiment of the present application, the connection between the annular protrusion and the two groove walls of the annular limiting groove 15, and the connection between the inner ring and the outer ring of the annular support frame 12 and the two groove walls of the annular limiting groove 15 are respectively achieved through an annular sliding groove 8 and an annular limiting slider;

[0048] One side of the annular limit slider is fixedly connected to the inner and outer sides of the annular protrusion, as well as the inner and outer rings of the annular support frame 12, and the other side of the annular limit slider is slidingly connected to the annular groove 8, and the annular limit block and the annular groove 8 are sealed and slidingly connected.

[0049] In the present application, in order to reduce the wear of the load-bearing steel ball 11 , the annular limiting groove 15 is filled with lubricating grease.

[0050] In this application, the clamping member includes a connecting portion 3 and a clamping portion;

[0051] The connecting portion 3 is a rod-shaped structure, and the connecting portion 3 is inserted into the connecting seat 2. The top of the connecting portion 3 is provided with a supporting portion;

[0052] The supporting portion includes a mounting plate, the mounting plate is horizontally connected to the top end of the connecting portion 3, and a supporting bracket 6 is provided on the mounting plate along the extension direction;

[0053] The bottom of the support bracket 6 is connected to the mounting plate;

[0054] The clamping member is movably connected to the top of the supporting bracket 6.

[0055] Furthermore, limit plates 9 are respectively provided on the tops of both ends of the support bracket 6;

[0056] The limiting plates 9 are respectively connected to the supporting brackets 6 .

[0057] Furthermore, a plurality of vertical limiting protrusions 7 are provided on the outer side of the connecting portion 3;

[0058] A through connection hole is provided at the center of the connection seat 2 along the axial direction, and a vertical limiting groove 10 matching the limiting protrusion 7 is provided on the inner side of the connection seat 2;

[0059] The limiting protrusion 7 is inserted into the limiting groove 10 .

[0060] Furthermore, the clamping portion includes a driving screw 4 and a first clamping plate 5 and a second clamping plate provided on the driving screw 4;

[0061] Among them, the openings of the first arc-shaped splint and the second splint are arranged opposite to each other, the bottoms of one end of the first splint 5 and the second splint are respectively inserted into the support bracket 6, and slide along the extension direction of the support bracket 6, the first splint 5 and the second splint are respectively threadedly connected to the driving screw 4, and the other end of the first splint 5 and the second arc-shaped splint form a clamping angle, and the first splint 5 and the second splint are respectively provided with internal threads matching the threads of the driving screw 4, and the directions of the internal threads of the first splint 5 and the second splint are opposite.

[0062] Furthermore, a slide groove 8 is provided on the top of the installation;

[0063] The ends of the first and second splints 5 and 6 inserted into the support bracket 6 are provided with sliders matching the slide grooves 8;

[0064] The sliders are connected to the bottom ends of the first clamping plate 5 and the second clamping plate respectively, and the sliders are slidably connected to the sliding grooves 8 respectively.

[0065] In the present application, in order to avoid radial displacement of the connecting part 3 in the connecting seat 2, which causes the two to be out of center, the present application provides a vertical limiting protrusion 7 and a vertical limiting groove 10 in the connecting part 3 and the connecting seat 2 respectively, wherein the limiting protrusion 7 is connected to the outer side of the connecting part 3, and the limiting protrusion 7 is inserted into the limiting groove 10.

[0066] During implementation, the diode group is fixed on the strip mounting plate, and then the strip mounting plate is placed between the first clamping plate and the second clamping plate, and the drive screw is rotated clockwise / counterclockwise. Since the internal threads on the first clamping plate and the second clamping plate are opposite, when the drive screw is rotated, the first clamping plate and the second clamping plate approach or move away from each other, and the drive screw is rotated in the direction of approaching each other, clamping the strip mounting plate, and the strip mounting plate and the diode group are fixed to the connecting seat, and then the test is carried out.

[0067] It should be noted that:

[0068] In this application, the shape of the splint is determined by the fixed strip mounting plate. When the cross section of the strip mounting plate is circular, the splint is in an arc shape. When the cross section of the adjustable mounting plate is square or rectangular, the shape of the splint is as shown in the attached embodiment of the application. Figure 2 The curved splint shown.

[0069] It should be noted that:

[0070] In the prior art, the commutation structure includes an insulating plate with a ground terminal and a half-wave rectifier output terminal mounted thereon. A long, strip-shaped fixed plate is rotatably connected to the insulating plate, and a commutator is mounted along its length. The commutator is elongated and has L-shaped connectors made of copper sheet mounted at each end. A curved conductive member is mounted on the side of the L-shaped connector closest to the insulating plate, protruding away from the commutator. Correspondingly, curved abutment members made of copper sheet are mounted on the insulating plate at positions corresponding to the ground terminal and the half-wave rectifier output terminal. The curved abutment members protrude away from the commutator, and guides are provided at each end to facilitate contact and adhesion of the curved conductive member. The rotating connection between the fixed plate and the insulating plate is achieved via bearings and a rotating shaft. However, the bearings have poor axial load bearing capacity. After a period of use, the rotating shaft experiences axial wear due to the long-term load on the rotating shaft. This results in unstable contact between the curved conductive member and the curved abutment member, hindering the stability of the electrical connection and affecting the test results.

Claims

1. The impulse voltage generator rectifier commutation structure is characterized by: include: A rotating base and a clamping member arranged on the rotating base; The rotating seat includes: a base and a connecting seat arranged on the top of the base; The cross-section of the connecting seat is a trapezoidal structure, and a first connecting portion and a second connecting portion are respectively provided between the bottom of the connecting seat and the base, and the connecting seat and the base are rotatably connected through the first connecting portion and the second connecting portion; The first connecting portion is located at the center of the connecting seat and the base respectively, and the second connecting portion is located on the outside of the first connecting portion and is arranged in a reverse direction along the circumference of the first connecting portion; The clamping piece is detachably connected to the top of the connecting seat.

2. The impulse voltage generator rectification and commutation structure according to claim 1, characterized in that: The first connecting portion includes correspondingly arranged limiting columns and limiting grooves; The limiting column and the limiting groove are respectively located at the bottom of the connecting seat and the top of the bottom; The top end of the limiting column is connected to the connecting seat, and the bottom end of the limiting column is inserted into the limiting groove.

3. The impulse voltage generator rectification and commutation structure according to claim 1, characterized in that: The second connecting portion includes an annular limiting groove, a first annular groove correspondingly arranged at the bottom of the connecting seat, and a second annular groove arranged in the annular limiting groove; The first annular groove and the second annular groove are respectively located on the circumference of the first connecting portion, and their cross sections are respectively arc-shaped; The peripheral side of the bottom of the connecting seat is movably connected to the annular limiting groove; An annular support frame is provided between the first annular groove and the second annular groove, and the annular support frame and the peripheral sides of the bottom of the connecting seat are respectively slidably connected to the side walls on both sides of the annular limiting groove, and limiting holes are evenly provided on the annular support frame, and load-bearing steel balls are provided in the limiting holes; The load-bearing steel balls are movably connected to the annular support frame, the first annular groove and the second annular groove respectively.

4. The impulse voltage generator rectification and commutation structure according to claim 3, characterized in that: The distance between the first annular groove and the second annular groove is greater than the load-bearing steel ball.

5. The impulse voltage generator rectification and commutation structure according to claim 1, characterized in that: The clamping member includes a connecting portion and a clamping portion; The connecting portion is a rod-shaped structure, the connecting portion is inserted into the connecting seat, and a supporting portion is provided on the top of the connecting portion; The supporting portion includes a mounting plate, the mounting plate is horizontally connected to the top end of the connecting portion, and a supporting bracket is provided on the mounting plate along the extension direction; The bottom of the support bracket is connected to the mounting plate; The clamping member is movably connected to the top of the supporting bracket.

6. The impulse voltage generator rectification and commutation structure according to claim 5, characterized in that: Limiting plates are respectively provided on the tops of both ends of the support bracket; The limiting plates are respectively connected to the supporting brackets.

7. The impulse voltage generator rectification and commutation structure according to claim 5, characterized in that: A plurality of vertical limiting protrusions are provided on the outer side of the connecting portion; A penetrating connecting hole is provided at the center of the connecting seat along the axial direction, and a vertical limiting groove matching the limiting protrusion is provided on the inner side of the connecting seat; The limiting protrusion is inserted into the limiting groove.

8. The impulse voltage generator rectification and commutation structure according to claim 7, characterized in that: The clamping portion includes a driving screw and a first clamping plate and a second clamping plate provided on the driving screw; The bottoms of one ends of the first clamping plate and the second clamping plate are respectively inserted into the supporting bracket and slide along the extension direction of the supporting bracket. The first clamping plate and the second clamping plate are respectively threadedly connected to the driving screw. The other ends of the first clamping plate and the second arc-shaped clamping plate form a clamping angle. The first clamping plate and the second clamping plate are respectively provided with internal threads matching the threads of the driving screw, and the directions of the internal threads of the first clamping plate and the second clamping plate are opposite.

9. The impulse voltage generator rectification and commutation structure according to claim 8, characterized in that: The top of the installation is provided with a slide groove; One end of the first and second clamping plates inserted into the support bracket is provided with a slider matching the slide groove; The sliders are connected to the bottom ends of the first clamping plate and the second clamping plate respectively, and the sliders are slidably connected to the sliding grooves respectively.

10. The impulse voltage generator rectification and commutation structure according to claim 9, characterized in that: The slide groove is filled with lubricating oil.

Images