A high-voltage ac fuse current characteristic testing device

Abstract

The application discloses a high-voltage alternating-current fuse current characteristic testing device, which comprises a control console, a device cavity is formed in the bottom of the back of the control console, a first mounting frame and four second mounting frames are arranged in the device cavity, a base is slidably arranged at the bottom of the inner frame of the first mounting frame and the second mounting frames, the base in the first mounting frame is used for mounting an alternating-current network isolation transformer, the alternating-current network isolation transformer is arranged in the first mounting frame, a connecting plug and a series plug are arranged, the connecting plug or the series plug is plugged into the socket in the adjacent second mounting frame, and thus the alternating-current network isolation transformer can be arranged in a circuit or separated from the circuit, when the alternating-current network isolation transformer is arranged in the circuit, series connection is realized, and when the alternating-current network isolation transformer is separated from the circuit, parallel connection is realized, so that the existing problems are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuse current characteristic test, in particular to a high-voltage alternating current fuse current characteristic test device. BACKGROUND

[0002] The high-voltage alternating current fuse is a device used for overload and short-circuit fault protection in power systems. It breaks the circuit by melting one or several specially designed fuses after the current exceeds a given value for a certain time. Due to its special nature, it is necessary to determine the action time and current characteristics of the fuse under overload or short-circuit conditions to ensure its protection function in the power system.

[0003] Therefore, a high-voltage fuse blowing characteristic comprehensive test device with publication number CN217181144U includes a rectifier bridge circuit, a full-bridge inverter circuit, an LC filter circuit, a transformer, a fuzzy PI and repetitive control composite circuit; the rectifier bridge circuit, the full-bridge inverter circuit, the LC filter circuit and the transformer are sequentially connected together, and the rectifier bridge circuit is also connected with the alternating current voltage source, and the transformer is also connected with the high-voltage fuse blowing characteristic comprehensive; the fuzzy PI and repetitive control composite circuit is connected with the full-bridge inverter circuit, and is also connected between the transformer and the high-voltage fuse blowing characteristic comprehensive.

[0004] The prior art realizes the characteristic relationship analysis between the short-circuit current and the blowing time of the fuse by sequentially connecting the rectifier bridge circuit, the full-bridge inverter circuit, the LC filter circuit and the transformer together. According to the known common sense, the transformer connection can improve the voltage withstand capability of the circuit, and is suitable for occasions requiring high voltage output. The connection of the transformers can also reduce the number of turns of each transformer by half, theoretically reducing the leakage inductance and improving the efficiency of the circuit. However, when facing occasions requiring large current output, the transformer connection method is not very suitable, and the transformers need to be connected in parallel. The transformer connection can improve the current carrying capacity of the circuit, and is suitable for occasions requiring large current output. The parallel connection of the transformers can also make the two magnetic cores easier to dissipate heat, reduce the load of a single transformer, improve the stability and reliability of the circuit. In summary, the connection method of the prior art results in a single range of application. SUMMARY

[0005] The purpose of the present application is to provide a high-voltage alternating current fuse current characteristic test device to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A high-voltage AC fuse current characteristic test device includes a console, wherein an equipment cavity is provided at the bottom back of the console, wherein a first mounting frame and four second mounting frames are provided in the equipment cavity, wherein bases are slidably mounted on the bottoms of the first and second mounting frames, wherein the base in the first mounting frame is used for mounting an AC grid isolation transformer, and the bases in the four second mounting frames are used for mounting a rectifier bridge circuit integrated board, a full-bridge inverter circuit integrated board, an LC filter circuit integrated board, and a transformer, respectively, in order from near to far from the first mounting frame, wherein a series connection mechanism and a parallel connection mechanism are provided in the bases.

[0008] Preferably, the parallel connection mechanism includes a connecting plug and a socket respectively arranged on the top edges of the inner walls on the left and right sides of the base, the socket in the first installation frame is used to electrically connect to the AC power grid, and the connecting plug is used to be connected in series with the socket, and several sockets in several second installation frames are respectively used to connect the input ends of the rectifier bridge circuit integrated board, the full-bridge inverter circuit integrated board, the LC filter circuit integrated board and the transformer, and the connecting plugs are respectively used to connect the output ends of the rectifier bridge circuit integrated board, the full-bridge inverter circuit integrated board, the LC filter circuit integrated board and the transformer, and the connecting plug far away from the first installation frame is used to connect the load and the output end of the transformer.

[0009] Preferably, the serial connection mechanism includes a turntable rotatably mounted on the top right side of the base in the first mounting frame, a connecting plug in the first mounting frame is arranged through one side of the turntable end face and a serial connection plug is installed through the other side of the turntable end face, the serial connection plug is electrically connected to the output end of the AC power grid isolation transformer and the input end of the AC power grid isolation transformer is connected to the connecting plug on the turntable and connected to the socket in the first mounting frame.

[0010] Preferably, the connecting plug and the serial plug in the first installation frame are plugged into the socket of the adjacent second installation frame, and the connecting plug in any of the second installation frames is plugged into the socket in the adjacent second installation frame, and both the first installation frame and the second installation frame are provided with a plug-in mechanism.

[0011] Preferably, the plug-in mechanism includes two symmetrically distributed brackets that are respectively plugged into the left and right sides of the bottom of the base. The top edges of the two brackets in the second mounting frame are fixedly connected with a plug-in bracket for plugging with the connecting plug and the socket. The top of the left bracket in the first mounting frame is also fixedly connected with a plug-in bracket, and the top of the right bracket is fixedly connected with a U-shaped block. The U-shaped block is rotatably engaged with the surface of the connecting plug and the serial plug in the first mounting frame. The upper parts of the bottom ends of the opposite sides of the two brackets in the same frame are fixedly connected with upper push rods, and the two upper push rods in the same frame are symmetrically arranged and the adjacent edges are distributed in a V-shape.

[0012] Preferably, lower push rods are fixedly connected to the lower ends of the bottom edges of the two opposite sides of the two brackets in the same frame, and the two lower push rods in the same frame are staggered and arranged in an oblique manner.

[0013] Preferably, the bracket surface at the right side position in the first mounting frame is rotationally connected with a gear wheel movably connected with the end surface of the rotary disc, and a rack plate is inserted and connected with the gear wheel, one end of the rack plate is fixedly connected with a connecting arm extending below the lower push rod, and one end of the connecting arm extends to the middle position of the front side edge of the bottom of the first mounting frame and a insertion hole is formed in the surface.

[0014] Preferably, a limiting mechanism is further arranged in the sliding base, the limiting mechanism comprises two spring rods arranged opposite to each other and fixedly connected with the bottom edge of the base, the spring rods are vertically arranged, a triangular block is fixedly connected with the telescopic end of the spring rod at the upper position, and a contact head abutting against the bottom of the first mounting frame and the second mounting frame is fixedly connected with the telescopic end of the spring rod at the lower position, and a stepping piece extending towards the cavity opening of the device cavity is fixedly connected with the bottom edge of the triangular block.

[0015] Preferably, a lead screw driven by a motor is rotationally connected with the opposite inner side wall of the device cavity and across the first mounting frame and the second mounting frame below, a sliding block sliding along the distribution direction of the first mounting frame and the second mounting frame is threadedly connected with the lead screw, an insertion plate sliding along the direction perpendicular to the length direction of the lead screw is inserted with the upper surface of the sliding block, a rack frame vertically lifting is inserted with the upper surface of the insertion plate, a connecting plate for pressing the stepping piece is fixedly connected with the side edge of the rack frame, and a push block for abutting against the upper push rod and the lower push rod is fixedly connected with the top edge of the rack frame, and the push block is movable in the up-down, front-back and left-right directions.

[0016] Preferably, an electric telescopic rod is arranged on the side edge of the insertion plate away from the first mounting frame, the cylinder of the electric telescopic rod is inserted with the cavity bottom of the device cavity, a gear ring meshingly connected with the rack frame is rotationally connected with the upper surface of the insertion plate extending upwards, and a through frame is throughly arranged on the adjacent side edge of the insertion plate close to the electric telescopic rod, and a rectangular strip driven by a motor and slidingly inserted with the inner wall of the gear ring is rotationally connected with the through frame.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] The first mounting frame is arranged in the device cavity of the control console, the AC grid isolation transformer is arranged in the first mounting frame, the connecting plug and the series plug are arranged, the connecting plug or the series plug is inserted with the socket in the adjacent second mounting frame, the AC grid isolation transformer is arranged in the circuit or separated from the circuit, the series connection is realized when the AC grid isolation transformer is in the circuit, and the parallel connection is realized when the AC grid isolation transformer is separated from the circuit.

[0019] The present invention provides a plug-in mechanism, utilizes the upper push rod and the lower push rod in the plug-in mechanism to be used alternately, and cooperates with the provided limiting mechanism to drive the connection plug and socket, or the serial plug and the adjacent socket to be plugged in or separated, ensuring contactless operation for personnel, thereby ensuring personnel safety and preventing electric shock.

[0020] The present invention provides a sliding block, which is used to move the sliding block left and right to realize the left and right movement of the plug plate and the push block, and uses the electric telescopic rod to extend and retract to realize the plug plate to drive the push block to move forward and backward, and uses the gear ring to rotate to realize the rack rack to drive the push block to move up and down. Therefore, the push block can be adjusted in position by moving the push block up and down, forward and backward, and left and right, and the upper push rod, lower push rod or turntable can be driven to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a high-voltage AC fuse current characteristic testing device of the present invention;

[0022] Figure 2 This invention is a high voltage AC fuse current characteristic test device Figure 1 Schematic diagram of the rear view structure;

[0023] Figure 3 This invention is a high voltage AC fuse current characteristic test device Figure 1 Schematic diagram of the cross-sectional structure;

[0024] Figure 4 This is a structural schematic diagram of a second installation frame of a high-voltage AC fuse current characteristic testing device according to the present invention;

[0025] Figure 5 This invention is a high voltage AC fuse current characteristic test device Figure 4 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 6 This invention is a high voltage AC fuse current characteristic test device Figure 4 A side structural diagram of

[0027] Figure 7 This invention is a high voltage AC fuse current characteristic test device Figure 6 Schematic diagram of the cross-sectional structure;

[0028] Figure 8 This is a structural schematic diagram of a first installation frame of a high-voltage AC fuse current characteristic testing device according to the present invention;

[0029] Figure 9 This invention is a high voltage AC fuse current characteristic test device Figure 8 A side structural diagram of

[0030] Figure 10 This is a structural schematic diagram of a sliding block of a high-voltage AC fuse current characteristic testing device of the present invention;

[0031] Figure 11 The present invention is a schematic structural diagram of a plug-in board for a current characteristic test device of a high-voltage AC fuse.

[0032] In the picture:

[0033] 1. Control console; 2. Equipment cavity; 3. First mounting frame; 4. Second mounting frame; 5. Sliding block; 6. Screw rod; 7. Through-frame; 8. Base; 9. Electric telescopic rod; 10. Plug rack; 11. Connecting plug; 12. Socket; 13. Bracket; 14. Upper push rod; 15. Lower push rod; 16. Spring rod; 17. Triangular block; 18. Pedal; 19. Contact head; 20. Serial plug; 21. U-shaped block; 22. Turntable; 23. Gear; 24. Rack plate; 25. Connecting arm; 26. Socket; 27. Plug plate; 28. Push block; 29. ​​Connecting plate; 30. Rack rack; 31. Gear ring; 32. Rectangular bar; 33. Boss. DETAILED DESCRIPTION

[0034] 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 implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] See also Figure 1-11 , the present invention provides a technical solution:

[0036] A high-voltage AC fuse current characteristic test device includes a console 1, a device cavity 2 is provided at the bottom of the back of the console 1, a first mounting frame 3 and four second mounting frames 4 are provided in the device cavity 2, and a base 8 is slidably installed at the bottom of the first mounting frame 3 and the second mounting frame 4. Figure 4 and Figure 8 As shown, both sides of the first installation frame 3 and the second installation frame 4 are hollowed out near the middle, and the hollow part is used to connect the plug 11, the socket 12 or the serial plug 20 to move out or receive to achieve plugging and unplugging. The base 8 in the first installation frame 3 is used to install the AC power grid isolation transformer, and the bases 8 in the four second installation frames 4 are used to install the rectifier bridge circuit integrated board, the full-bridge inverter circuit integrated board, the LC filter circuit integrated board and the transformer in order from near to far from the first installation frame 3. A series connection mechanism and a parallel connection mechanism are provided in the base 8. By changing the connection method of the circuit, it is convenient to choose whether to connect in series or in parallel according to the actual situation in actual operation.

[0037] Embodiment one: the parallel connection mechanism includes the connection plug 11 and the socket 12 arranged on the top edges of the inner walls on the left and right sides of the base 8 respectively, the socket 12 in the first mounting frame 3 is used for electrically connecting the AC power grid, the connection plug 11 is used for being connected in series with the socket 12, the sockets 12 in the second mounting frames 4 are used for connecting the input ends of the rectifier bridge circuit integrated board, the full-bridge inverter circuit integrated board, the LC filter circuit integrated board and the transformer respectively, the connection plug 11 is used for connecting the output ends of the rectifier bridge circuit integrated board, the full-bridge inverter circuit integrated board, the LC filter circuit integrated board and the transformer respectively, and the connection plug 11 far from the distal end of the first mounting frame 3 is used for connecting the output end of the transformer and the load, in the parallel connection case, the connection sequence of the whole circuit is: AC power grid→rectifier bridge circuit integrated board→full-bridge inverter circuit integrated board→LC filter circuit integrated board→transformer→load.

[0038] Embodiment two: the series connection mechanism includes the rotating disc 22 rotatably arranged on the top edge of the right side of the base 8 in the first mounting frame 3, the connection plug 11 in the first mounting frame 3 is arranged through one side of the end face of the rotating disc 22, and the series connection plug 20 is arranged through the other side of the end face of the rotating disc 22, the series connection plug 20 is electrically connected with the output end of the AC power grid isolation transformer, and the input end of the AC power grid isolation transformer is connected with the connection plug 11 on the rotating disc 22 and the socket 12 in the first mounting frame 3, further, the connection plug 11 and the series connection plug 20 in the first mounting frame 3 are plugged with the socket 12 of the adjacent second mounting frame 4, and the connection plug 11 in any second mounting frame 4 is plugged with the socket 12 in the adjacent second mounting frame 4; in the series connection case, the connection sequence of the whole circuit is: AC power grid→AC power grid isolation transformer→rectifier bridge circuit integrated board→full-bridge inverter circuit integrated board→LC filter circuit integrated board→transformer→load, in order to ensure the smoothness of the circuit, in actual use, the rotating disc 22 is rotated by half a circle to realize that the series connection plug 20 is located above the connection plug 11, and the series connection plug 20 is plugged with the socket 12 in the adjacent second mounting frame 4 by pushing the series connection plug 20 to move, so that the AC power grid isolation transformer is connected in the circuit, and the series connection is realized.

[0039] Embodiment three: the plug-in mechanism is arranged in the first mounting frame 3 and the second mounting frame 4, the plug-in mechanism is used for driving the connection plug 11 to be plugged with the socket 12, or the series connection plug 20 to be plugged with or separated from the adjacent socket 12, so as to ensure that the personnel operate without contact, and further ensure the safety of the personnel and prevent electric shock, the plug-in mechanism includes two supports 13 symmetrically arranged and plugged in the left and right sides of the bottom of the base 8 respectively, the top edges of the two supports 13 in the second mounting frame 4 are fixedly connected with the plug-in frame 10 used for being plugged with the connection plug 11 and the socket 12, such as Figure 6 、 Figure 7 and Figure 8As shown, the surfaces of the socket 12, the serial plug 20 and the connecting plug 11 are all provided with annular protrusions for engaging with the plug rack 10, ensuring that when the bracket 13 drives the plug rack 10 to move, the correspondingly engaged socket 12, the serial plug 20 or the connecting plug 11 will move synchronously. The top of the left bracket 13 in the first installation frame 3 is also fixedly connected to the plug rack 10, and the top of the right bracket 13 is fixedly connected to the U-shaped block 21. The U-shaped block 21 is rotated and engaged with the surface of the connecting plug 11 and the serial plug 20 in the first installation frame 3, and combined with Figure 8 It can be seen that the part of the bracket 13 on the right side of the first installation frame 3 located at the turntable 22 is U-shaped, and is staggered with the connecting plug 11 and the serial plug 20, and combined with the U-shaped block 21 set on its surface, when the turntable 22 rotates, it will drive the connecting plug 11 and the serial plug 20 installed on its surface to alternately pass through the U-shaped block 21 and plug into the surface of the U-shaped block 21. Therefore, when the bracket 13 moves and drives the U-shaped block 21 to move, the connecting plug 11 or the serial plug 20 engaged with the U-shaped block 21 will move synchronously. The upper parts of the bottom ends of the opposite sides of the two brackets 13 in the same frame are fixedly connected to the upper push rod 14, and the two upper push rods 14 in the same frame are symmetrically arranged and the adjacent sides are V-shaped. The lower parts of the bottom ends of the opposite sides of the two brackets 13 in the same frame are fixedly connected to the lower push rod 15. The two lower push rods 15 in the same frame are staggered up and down and arranged in a beveled manner. Figure 5 When the adjacent sides of the two upper push rods 14 are pushed away from each other by the "object", the corresponding brackets 13 will be driven to move accordingly, and the two brackets 13 in the same frame will move away from each other, so that the connecting plug 11, socket 12 or serial plug 20 set on the bracket 13 can be moved to achieve smooth plugging. When the adjacent oblique sides of the two lower push rods 15 are pressed away from each other by the "object", the corresponding brackets 13 will be driven to move, so that the two brackets 13 in the same frame can be moved closer to each other, and the connecting plug 11, socket 12 or serial plug 20 set on the bracket 13 can be changed from a plugged in state to a separated state, making it easier for personnel to slide out the base 8.

[0040] In the fourth embodiment, the right position support 13 in the first mounting frame 3 is rotatably connected with a gear 23 movably connected with the end surface of the rotating disc 22, and a rack plate 24 is inserted and connected with the gear 23. One end of the rack plate 24 is fixedly connected with a connecting arm 25 extending below the lower push rod 15. One end of the connecting arm 25 extends to the middle position of the front side edge of the bottom of the first mounting frame 3, and a insertion hole 26 is formed on the surface of the connecting arm 25. In order to drive the rotating disc 22 to rotate, the "object" is inserted into the insertion hole 26, and the movement of the "object" drives the connecting arm 25 to move, which in turn drives the rack plate 24 to move. The gear 23 connected with the rack plate 24 rotates, which in turn drives the rotating disc 22 to rotate, and the connecting plug 11 and the serial plug 20 on the rotating disc 22 are exchanged. In this embodiment, the movable connection is achieved by connecting a telescopic rod at the center of the end surface of the gear 23 with the center of the end surface of the rotating disc 22. The telescopic rod can ensure that the gear 23 can drive the rotating disc 22 to rotate when the gear 23 rotates. When the support 13 moves to drive the gear 23 to move synchronously, the telescopic rod can ensure that the position of the rotating disc 22 does not change, but does not affect the position adjustment of the gear 23.

[0041] In the fifth embodiment, a limiting mechanism is further arranged in the base 8. The limiting mechanism includes two spring rods 16 arranged opposite to each other at the end surface and fixedly connected with the bottom edge of the base 8. The spring rods 16 are vertically arranged, and the upper spring rod 16 is fixedly connected with a triangular block 17 at the telescopic end, and the lower spring rod 16 is fixedly connected with an abutting head 19 abutting against the bottom of the first mounting frame 3 and the second mounting frame 4. The elastic telescopic function of the lower spring rod 16 can ensure that the abutting head 19 is clamped on the bottom of the first mounting frame 3 or the second mounting frame 4, so that the position of the base 8 on the bottom of the first mounting frame 3 or the second mounting frame 4 is fixed. The bottom edge of the triangular block 17 is fixedly connected with a stepping plate 18 extending towards the cavity opening of the equipment cavity 2. In combination with Figure 5It can be seen that the surface of the lower push rod 15 on the same side of the triangular block 17 extends outward in a strip shape, and the strip extension portion is set at the same height as the inclined surface of the triangular block 17. Therefore, when the two upper push rods 14 are subjected to pressure to realize the two brackets 13 in the same frame to move away from each other, the lower push rod 15 installed on the bracket 13 will also move. When the strip-shaped protrusion on the lower push rod 15 passes the inclined edge of the triangular block 17 and forces the upper spring rod 16 to shrink until the strip protrusion moves to the vertical edge on the right side of the triangular block 17, the elastic extension of the upper spring rod 16 is used to realize the descending of the triangular block 17 to use its right vertical edge to support the strip protrusion, so that the distance between the bracket 13 and the side of the base 8 can be fixed, which can prevent The connection plug 11 and the socket 12, or the serial plug 20 and the socket 12 in the plugged state are stably plugged and will not loosen or separate. When the pedal 18 is moved down to separate from the upper push rod 14 and located between the lower push rods 15, the "object" is used to generate pressure on the pedal 18 so that the telescopic end of the spring rod 16 above drives the triangular block 17 to descend to be misaligned with the strip-shaped protrusion. At this time, when the "object" moves horizontally while pressing the pedal 18, it will force the two corresponding lower push rods 15 in the same frame to move away from each other, so that the two brackets 13 in the same frame can be brought close to each other, and the connection plug 11 and the socket 12 in the plugged state, or the serial plug 20 and the socket 12 can be separated.

[0042] The cam 21 is connected with the support 24 of the first frame 3 and the support 24 by the screw rod 6, and the cam 21 is connected with the support 24 by the screw rod 6. A mounting frame 3 or any second mounting frame 4 is used to realize that the push block 28 on the mounting plate 27 contacts the upper push rod 14 or the lower push rod 15, and the rack frame 30 is used to lift and lower the plate 27 to realize the lifting and lowering of the push block 28, so that the push block 28 can selectively contact the surface of the upper push rod 14 or the lower push rod 15. The bottom edge of the push block 28 is fixedly connected with a boss 33 for plugging into the socket 26. The push block 28 is continuously lowered until the boss 33 at the bottom is inserted into the socket 26, and the push block 28 can be accompanied by The push block 28 moves forward and backward, realizing that the connecting arm 25 drives the rack plate 24 to move, and the push block 28 moves in the up and down, front and back, and left and right directions. An electric telescopic rod 9 is provided on one side of the plug plate 27 away from the first mounting frame 3. The cylinder of the electric telescopic rod 9 is plugged into the bottom of the equipment cavity 2. Therefore, when the sliding block 5 moves left and right under the rotation of the screw rod 6, it will drive the plug plate 27 on its surface and the electric telescopic rod 9 provided on one side of the plug plate 27 and the push block 28 above it to move left and right synchronously, and as shown in FIG. Figure 3 and Figure 10 As shown, the cylinder part of the electric telescopic rod 9 can only slide in the left and right directions. Therefore, the plug plate 27 can be moved forward and backward by extending and retracting the electric telescopic rod 9, and then the push block 28 installed on the plug plate 27 can be moved forward and backward. The upper surface of the plug plate 27 extends upward and is rotatably connected to a gear ring 31 that is meshed with a rack rack 30. The plug plate 27 is provided with a through-frame 7 penetrating the adjacent side of the electric telescopic rod 9. The through-frame 7 is rotatably connected to a rectangular bar 32 that is driven by a motor and is slidably plugged into the inner wall of the gear ring 31. When the plug plate 27 moves left and right, it will synchronously drive the gear ring 31 installed on its surface to slide left and right on the surface of the rectangular bar 32, and as shown in FIG. Figure 10As shown, the inner wall of the toothed ring 31 is rectangular, so the rotation of the toothed ring 31 can be achieved by rotating the rectangular bar 32, thereby achieving the meshing connection of the rack frame 30 to drive the push block 28 to move up and down. In addition, when the rack frame 30 moves up and down, the connecting plate 29 installed on its surface will move up and down synchronously. Therefore, the connecting plate 29 is moved down to overlap the surface of the pedal 18, and the connecting plate 29 is continuously lowered to achieve the pedal 18 to drive the upper spring rod 16 to contract. Moreover, when the rack frame 30 drives the push block 28 to move forward and backward, left and right when it is against the lower push rod 15, or when the boss 33 is plugged into the socket 26, the connecting plate 29 will slide on the upper surface of the pedal 18.

[0043] The method of use and working principle of this device: During installation, the AC grid isolation transformer is installed in the base 8 in the first installation frame 3, and the rectifier bridge circuit integrated board, the full-bridge inverter circuit integrated board, the LC filter circuit integrated board and the transformer are respectively installed in the base 8 in the four second installation frames 4 in an arrangement from near to far from the first installation frame 3, and the input and output ends are electrically connected to the socket 12 and the connecting plug 11 respectively, and the input end of the AC grid isolation transformer in the first installation frame 3 is electrically connected to the socket 12, and the output end is electrically connected to the serial plug 20, and the plug in the first installation frame 3 is electrically connected to the serial plug 20. The seat 12 is also electrically connected to the connecting plug 11 of the same frame in a parallel manner, and the sliding block 5 is moved to each second mounting frame 4 in turn, and the push block 28 is moved up to the upper push rod 14, and then the push block 28 moves forward to push the two upper push rods 14 away from each other, thereby realizing that the two brackets 13 in the same frame are away from each other, and the socket 12 and the connecting plug 11 of the same frame are extended out of the second mounting frame 4, and so on, to realize that the adjacent sockets 12 of the two adjacent second mounting frames 4 are plugged into the connecting plug 11, and then the sliding block 5 is moved to the front of the first mounting frame 3. According to the usage scenario, when parallel connection is required, such as Figure 10 As shown, the push block 28 is directly advanced to realize that the socket 12 and the connecting plug 11 in series in the first installation frame 3 are moved away from each other until the connecting plug 11 is plugged into the socket 12 in the adjacent second installation frame 4; when serial connection is required, the push block 28 descends until the boss 33 is inserted into the insertion hole 26, and as the push block 28 retreats, the connecting arm 25 drives the rack plate 24 to move, so that the meshing gear 23 drives the turntable 22 to rotate and thus the connecting plug 11 and the serial plug 20 on the turntable 22 exchange positions, and then the push block 28 rises to the upper push rod 14 in the first installation frame 3, and the two upper push rods 14 in the first installation frame 3 can be pushed away from each other by the push block 28, so that the serial plug 20 in the first installation frame 3 can be plugged into the socket 12 in the adjacent second installation frame 4, and serial connection can be realized.

[0044] The wiring diagram of the electric telescopic rod 9, motor storage, AC grid isolation transformer, rectifier bridge circuit integrated board, full-bridge inverter circuit integrated board, LC filter circuit integrated board, and transformer in the present utility model is common knowledge in the art. Its working principle is already known technology, and its model is selected according to actual use. Therefore, the control method and wiring layout of the electric telescopic rod 9, motor storage, AC grid isolation transformer, rectifier bridge circuit integrated board, full-bridge inverter circuit integrated board, LC filter circuit integrated board, and transformer will not be explained in detail. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A high-voltage AC fuse current characteristic test device, characterized in that: The console (1) comprises a device cavity (2) provided at the bottom of the back of the console (1), a first installation frame (3) and four second installation frames (4) being provided in the device cavity (2), bases (8) being slidably installed on the bottom of the inner frames of the first installation frame (3) and the second installation frame (4), the base (8) in the first installation frame (3) being used for installing an AC power grid isolation transformer, and the bases (8) in the four second installation frames (4) being used for installing a rectifier bridge circuit integrated board, a full-bridge inverter circuit integrated board, an LC filter circuit integrated board and a transformer in the order of being closer to the first installation frame (3), and a series connection mechanism and a parallel connection mechanism being provided in the base (8); The serial connection mechanism includes a turntable (22) rotatably mounted on the top right side of the base (8) in the first installation frame (3), a connecting plug (11) in the first installation frame (3) is arranged through one side of the end surface of the turntable (22), and a serial connection plug (20) is installed through the other side of the end surface of the turntable (22), the serial connection plug (20) is electrically connected to the output end of the AC power grid isolation transformer, and the input end of the AC power grid isolation transformer and the connecting plug (11) on the turntable (22) are connected in parallel to the socket (12) in the first installation frame (3); The connecting plug (11) and the serial plug (20) in the first installation frame (3) are plugged into the socket (12) of the adjacent second installation frame (4), and the connecting plug (11) in any second installation frame (4) is plugged into the socket (12) in the adjacent second installation frame (4), and the first installation frame (3) and the second installation frame (4) are both provided with a plug-in mechanism; The plug-in mechanism comprises two symmetrically distributed brackets (13) respectively plugged into the left and right sides of the bottom of the base (8), the top edges of the two brackets (13) in the second installation frame (4) are fixedly connected with a plug-in bracket (10) for plugging with the connecting plug (11) and the socket (12), the top of the left bracket (13) in the first installation frame (3) is also fixedly connected with the plug-in bracket (10), and the top of the right bracket (13) is fixedly connected with a U-shaped block (21), the U-shaped block (21) is rotatably engaged with the surface of the connecting plug (11) and the serial plug (20) in the first installation frame (3), the upper parts of the bottom ends of the two brackets (13) in the same frame are fixedly connected with upper push rods (14), and the two upper push rods (14) in the same frame are symmetrically arranged and the adjacent edges are distributed in a V shape; The lower parts of the bottom ends of the two opposite sides of the two brackets (13) in the same frame are fixedly connected with lower push rods (15), and the two lower push rods (15) in the same frame are staggered and arranged in an oblique direction; The surface of the bracket (13) at the right side of the first installation frame (3) is rotatably connected to a gear (23) movably connected to the end surface of the turntable (22) and is plugged with a rack plate (24) meshing with the gear (23), one end of the rack plate (24) is fixedly connected to a connecting arm (25) extending below the lower push rod (15), one end of the connecting arm (25) extends to the middle position of the front side edge of the bottom of the first installation frame (3) and has a socket (26) on the surface; A limiting mechanism is also provided in the base (8), the limiting mechanism comprising two spring rods (16) arranged opposite to each other at the end faces of the cylinder body and fixedly connected to the bottom edge of the base (8), the spring rods (16) being arranged vertically, the telescopic end of the spring rod (16) at the upper position being fixedly connected to a triangular block (17), and the telescopic end of the spring rod (16) at the lower position being fixedly connected to a contact head (19) abutting against the bottoms of the first mounting frame (3) and the second mounting frame (4), and the bottom edge of the triangular block (17) being fixedly connected to a pedal (18) extending toward the cavity opening of the equipment cavity (2); The surface of the lower push rod (15) on the same side as the triangular block (17) extends outward in a strip shape, and the strip extension portion is set at the same height as the inclined surface of the triangular block (17). Therefore, when the two upper push rods (14) are subjected to pressure to realize the two brackets (13) in the same frame to move away from each other, the lower push rod (15) installed on the bracket (13) will also move. When the strip-shaped protrusion on the lower push rod (15) passes through the inclined edge of the triangular block (17) and forces the upper spring rod (16) to shrink until the strip-shaped protrusion moves to the vertical edge on the right side of the triangular block (17), the elastic extension of the upper spring rod (16) is used to realize the triangular block (17) to descend to the right vertical edge thereof against the strip-shaped protrusion, so that the distance between the bracket (13) and the side of the base (8) is fixed.

2. A high-voltage AC fuse current characteristic test device according to claim 1, characterized in that: The parallel connection mechanism includes a connection plug (11) and a socket (12) respectively arranged on the top edges of the inner walls on the left and right sides of the base (8); the socket (12) in the first installation frame (3) is used for electrically connecting to the AC power grid, and the connection plug (11) is used for being connected in series with the socket (12); the plurality of sockets (12) in the second installation frames (4) are respectively used for connecting the input end of the rectifier bridge circuit integrated board, the full-bridge inverter circuit integrated board, the LC filter circuit integrated board and the transformer; the connection plug (11) is respectively used for connecting the output end of the rectifier bridge circuit integrated board, the full-bridge inverter circuit integrated board, the LC filter circuit integrated board and the transformer; and the connection plug (11) at the far end of the first installation frame (3) is used for connecting the load and the output end of the transformer.

3. A high-voltage AC fuse current characteristic test device according to claim 1, characterized in that: The equipment cavity (2) is rotatably connected to a screw rod (6) driven by a motor and spanning the first mounting frame (3) and the lower part of the plurality of second mounting frames (4) relative to the inner wall. The screw rod (6) is threadedly connected to a sliding block (5) that slides along the distribution direction of the first mounting frame (3) and the plurality of second mounting frames (4). The upper surface of the sliding block (5) is plugged with a plug plate (27) that slides along a direction perpendicular to the length of the screw rod (6). The upper surface of the plug plate (27) is plugged with a vertically lifting rack (30). The side of the rack rack (30) is fixedly connected to a connecting plate (29) for pressing down the pedal (18), and the top edge of the rack rack (30) is fixedly connected to a push block (28) for contacting the upper push rod (14) and the lower push rod (15). The bottom edge of the push block (28) is fixedly connected to a boss (33) for plugging into the socket (26). The push block (28) moves in the up and down, front and back, and left and right directions.

4. A high-voltage AC fuse current characteristic test device according to claim 3, characterized in that: An electric telescopic rod (9) is provided on one side of the plug plate (27) away from the first mounting frame (3); a cylinder of the electric telescopic rod (9) is plugged into the bottom of the equipment cavity (2); an upper surface of the plug plate (27) is extended upward and rotatably connected to a gear ring (31) meshed with a rack rack (30); a through-frame (7) is provided through the adjacent side of the plug plate (27) close to the electric telescopic rod (9); a rectangular bar (32) is rotatably connected to the through-frame (7) and is driven by a motor and is slidably plugged into the inner wall of the gear ring (31).

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