Device for testing current characteristics of high-voltage alternating-current fuse

Abstract

A high-voltage alternating-current fuse current characteristic testing device disclosed by the present invention comprises a console, an equipment cavity is formed in the bottom of the back surface of the console, a first mounting frame and four second mounting frames are arranged in the equipment cavity, and bases are slidably mounted at the inner frame bottoms of the first mounting frame and the second mounting frames; the base in the first mounting frame is used for mounting the alternating current power grid isolation transformer, the alternating current power grid isolation transformer is arranged in the first mounting frame, the connecting plug and the series plug are arranged, and the connecting plug or the series plug is connected with the socket in the adjacent second mounting frame in an inserted mode. Therefore, the alternating-current power grid isolation transformer can be arranged in a circuit or separated from the circuit, when the alternating-current power grid isolation transformer is located in the circuit, series connection use is achieved, when the alternating-current power grid isolation transformer is separated from the circuit, parallel connection use is achieved, and the existing problems are solved.

Description

Technical Field

[0001] The invention relates to the technical field of fuse current characteristic testing, and in particular to a high-voltage AC fuse current characteristic testing device. Background Art

[0002] High-voltage AC fuse is a device used for overload and short-circuit fault protection in power systems. It disconnects the circuit by melting one or several specially designed fuses after the current exceeds a given value for a certain period of time. Due to the particularity of its operation, 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 comprehensive testing device for the blowing characteristics of a high-voltage fuse is disclosed, with the publication number CN217181144U, comprising a rectifier bridge circuit, a full-bridge inverter circuit, an LC filter circuit, a transformer, and 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 connected in series in sequence, and the rectifier bridge circuit is also connected to the AC voltage source, and the transformer is also connected to the comprehensive blowing characteristics of the high-voltage fuse; the fuzzy PI and repetitive control composite circuit is connected to the full-bridge inverter circuit, and is also connected between the transformer and the comprehensive blowing characteristics of the high-voltage fuse.

[0004] The prior art realizes the analysis of the characteristic relationship between the short-circuit current and the melting time of the fuse by connecting a rectifier bridge circuit, a full-bridge inverter circuit, an LC filter circuit and a transformer in series in sequence. According to known common sense, connecting transformers in series can improve the voltage resistance of the circuit and is suitable for occasions requiring high voltage output. The series connection can also halve the turns ratio of each transformer, which can theoretically reduce the leakage inductance and improve the efficiency of the circuit. However, when facing occasions requiring large current output, the series connection of transformers is not very suitable, but the transformers need to be connected in parallel. The parallel connection of transformers can improve the current bearing capacity of the circuit and is suitable for occasions requiring large current output. The parallel connection can also make the two magnetic cores easier to dissipate heat, reduce the load of a single transformer, and improve the stability and reliability of the circuit. In summary, the series connection method of the prior art leads to a single scope of application. Summary of the invention

[0005] The object of the present invention is to provide a high voltage AC fuse current characteristic testing device to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A high-voltage AC fuse current characteristic test device comprises a console, wherein an equipment cavity is provided at the bottom of the back of the console, wherein a first installation frame and four second installation frames are arranged in the equipment cavity, wherein bases are slidably installed at the bottom of the first installation frame and the second installation frame, wherein the base in the first installation frame is used for installing an AC power grid isolation transformer, and the bases in the four second installation frames are respectively 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 from near to far from the first installation frame, wherein a series connection mechanism and a parallel connection mechanism are arranged in the base.

[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 the several sockets in the 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, 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 to the output end of the transformer.

[0009] Preferably, the series connection mechanism includes a turntable rotatably installed on the top right side of the base in the first installation frame, a connecting plug in the first installation frame is arranged through one side of the turntable end face and a series plug is installed through the other side of the turntable end face, the series 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 installation 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 the first installation frame and the second installation frame are both provided with a plug-in mechanism.

[0011] Preferably, the plug-in mechanism includes two brackets that are symmetrically distributed and respectively plugged into the left and right sides of the bottom of the base. The top edges of the two brackets in the second installation 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 installation 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 installation 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 parts of the bottom ends 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 surface of the bracket at the right side in the first installation frame is rotatably connected to a gear movably connected to the end surface of the turntable and is plugged into a rack plate meshing with the gear, one end of the rack plate is fixedly connected to a connecting arm extending to below the lower push rod, one end of the connecting arm extends to the middle of the front side edge of the bottom of the first installation frame and a socket is opened on the surface.

[0014] Preferably, a limiting mechanism is also provided in the sliding base, and the limiting mechanism includes two spring rods which are arranged opposite to each other at the end faces of the cylinder body and are fixedly connected to the bottom edge of the base, the spring rods are arranged vertically, and the telescopic ends of the spring rods at the upper positions are fixedly connected to a triangular block, and the telescopic ends of the spring rods at the lower positions are fixedly connected to a contact head which abuts against the bottoms of the first mounting frame and the second mounting frame, and the bottom edge of the triangular block is fixedly connected to a pedal extending toward the cavity opening of the equipment cavity.

[0015] Preferably, the equipment cavity is rotatably connected to a screw rod driven by a motor and spanning under the first mounting frame and several second mounting frames relative to the inner wall, the screw rod is threadedly connected to a sliding block that slides along the distribution direction of the first mounting frame and several second mounting frames, the upper surface of the sliding block is plugged with a plug plate that slides along the direction perpendicular to the length of the screw rod, the upper surface of the plug plate is plugged with a vertically lifting rack rack, the side of the rack rack is fixedly connected to a connecting plate for pressing down the pedal, and the top edge of the rack rack is fixedly connected to a push block for abutting against the upper push rod and the lower push rod, the bottom edge of the push block is fixedly connected to a convex column for plugging into the socket, and the push block moves in the up and down, front and back, and left and right directions.

[0016] Preferably, an electric telescopic rod is provided on one side of the plug plate away from the first mounting frame, the cylinder body of the electric telescopic rod is plugged into the bottom of the equipment cavity, the upper surface of the plug plate extends upward and is rotatably connected to a gear ring meshing with a rack frame, and a penetrating frame is provided through the adjacent side of the plug plate close to the electric telescopic rod, and a rectangular bar driven by a motor and slidably plugged into the inner wall of the gear ring is rotatably connected to the penetrating frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention installs a first installation frame in the equipment cavity of the console, sets an AC power grid isolation transformer in the first installation frame, and sets a connecting plug and a series plug. The connecting plug or the series plug is plugged into the socket in the adjacent second installation frame, so that the AC power grid isolation transformer can be set in the circuit or separated from the circuit. When the AC power grid isolation transformer is in the circuit, it can be used in series, and when the AC power grid isolation transformer is separated from the circuit, it can be used in parallel.

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

[0020] The present invention arranges a sliding block, utilizes the left and right movement of the sliding block to realize the left and right movement of the plug plate and the push block, utilizes the extension and retraction of the electric telescopic rod to realize the plug plate driving the push block to move forward and backward, utilizes the rotation of the gear ring to realize the up and down movement of the rack frame driving the push block, therefore, the position of the push block can be adjusted by moving the push block up and down, forward and backward, left and right, and the upper push rod, the lower push rod or the turntable can be driven to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 A high voltage AC fuse current characteristic testing device of the present invention Figure 1 A rear view structural diagram of ;

[0023] Figure 3 A high voltage AC fuse current characteristic testing device of the present invention Figure 1 A schematic cross-sectional structure diagram of ;

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

[0025] Figure 5 A high voltage AC fuse current characteristic testing device of the present invention Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 6 A high voltage AC fuse current characteristic testing device of the present invention Figure 4 A side view schematic diagram of the structure;

[0027] Figure 7 A high voltage AC fuse current characteristic testing device of the present invention Figure 6 A schematic cross-sectional structure diagram of ;

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

[0029] Fig. 9 A high voltage AC fuse current characteristic testing device of the present invention Figure 8 A side view schematic diagram of the structure;

[0030] Fig.10 It is a structural schematic diagram of a sliding block of a current characteristic testing device for a high-voltage AC fuse according to the present invention;

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

[0032] In the figure:

[0033] 1. Control console; 2. Equipment cavity; 3. First installation frame; 4. Second installation 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described 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 creative work are 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 comprises 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 arranged 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 hollowed-out part is used to connect the plug 11, the socket 12 or the serial plug 20 to move, extend or store, so as to realize 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 the order from near to far from the first installation frame 3. A series connection mechanism and a parallel connection mechanism are arranged in the base 8. By changing the connection mode of the circuit, it is convenient to select whether to connect in series or in parallel according to the actual situation in actual operation.

[0037] Embodiment 1: The parallel connection mechanism includes a connecting 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 to electrically connect to the AC power grid, and the connecting plug 11 is used to be connected in series with the socket 12. The several sockets 12 in the several second installation frames 4 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 plug 11 is 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 11 far away from the first installation frame 3 is used to connect the load to the output end of the transformer. In the parallel connection case, the connection order of the entire 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 2: 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 connection plug 11 in the first installation frame 3 is arranged on one side of the end face of the turntable 22, and a serial connection plug 20 is installed on the other side of the end face 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 is connected to the connection plug 11 on the turntable 22 and connected to the socket 12 in the first installation frame 3, further, the connection plug 11 in the first installation frame 3 and the serial connection plug 20 are plugged into the socket 12 of the adjacent second installation frame 4, and any second installation The connecting plug 11 in the mounting frame 4 is plugged into the socket 12 in the adjacent second mounting frame 4; in the case of series connection, the connection sequence of the entire 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 smooth circuit operation, in actual use, the turntable 22 rotates half a circle to realize that the serial plug 20 is located above the connecting plug 11, and by pushing the serial plug 20 to move and plug it into the socket 12 in the adjacent second mounting frame 4, the AC power grid isolation transformer can be connected to the circuit to realize the series connection.

[0039] Embodiment 3: A plug-in mechanism is provided in both the first mounting frame 3 and the second mounting frame 4. The plug-in mechanism is used to drive the connection plug 11 and the socket 12, or the serial plug 20 and the adjacent socket 12 to be plugged in or separated, to ensure non-contact operation for personnel, thereby ensuring personnel safety and preventing electric shock. The plug-in mechanism includes two symmetrically distributed brackets 13 respectively plugged in the left and right sides of the bottom of the base 8. The top edges of the two brackets 13 in the second mounting frame 4 are fixedly connected with a plug-in bracket 10 for plugging in the connection plug 11 and the socket 12, such as Figure 6 , Figure 7 and Figure 8As shown, the socket 12, the serial plug 20 and the connecting plug 11 are all provided with annular protrusions on the surface for engaging with the plug rack 10, so as to ensure 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 rotatably engaged with the surface of the connecting plug 11 and the serial plug 20 in the first installation frame 3, and the connection is combined. 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 arranged 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 movement of the bracket 13 here drives the movement of the U-shaped block 21, the connecting plug 11 or the serial plug 20 engaged with the U-shaped block 21 will move synchronously, and 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 rods 14, and the two upper push rods 14 in the same frame are symmetrically arranged and the adjacent sides are distributed in a V shape, and 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 rods 15, and the two lower push rods 15 in the same frame are staggered up and down and arranged in a beveled manner, combined with 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, the socket 12 or the 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 pushed 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, the socket 12 or the serial plug 20 set on the bracket 13 can be changed from a plug-in state to a separated state, which is convenient for personnel to slide out the base 8.

[0040] Embodiment 4: The surface of the bracket 13 at the right position in the first installation frame 3 is rotatably connected to a gear 23 movably connected to the end surface of the turntable 22 and a rack plate 24 meshingly connected to the gear 23. One end of the rack plate 24 is fixedly connected to a connecting arm 25 extending to the bottom of 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 a plug hole 26 is opened on the surface. In order to drive the turntable 22 to rotate, an "object" is inserted into the plug hole 26, and the "object" is moved to realize that the connecting arm 25 drives the rack plate 24 The movable connection in this embodiment is specifically to connect a telescopic rod at the center of the end surface of the gear 23 and the center of the end surface of the turntable 22, and utilize the telescopic characteristics of the telescopic rod to ensure that the turntable 22 can be driven to rotate when the gear 23 rotates. At the same time, when the bracket 13 moves to realize the synchronous movement of the gear 23, the telescopic rod is utilized to ensure that the position of the turntable 22 remains unchanged but does not affect the position adjustment of the gear 23.

[0041] Embodiment 5: A limiting mechanism is also provided in the base 8, and the limiting mechanism includes two spring rods 16 which are arranged opposite to each other at the end faces of the cylinder body and are fixedly connected to the bottom edge of the base 8. The spring rods 16 are arranged vertically, and the telescopic end of the spring rods 16 at the upper position is fixedly connected to a triangular block 17, and the telescopic end of the spring rods 16 at the lower position is fixedly connected to a contact head 19 which abuts against the bottom of the first mounting frame 3 and the second mounting frame 4. The elastic telescopic end of the lower spring rod 16 can ensure that the contact head 19 is stuck at the bottom of the first mounting frame 3 or the second mounting frame 4 to achieve the fixing of the base 8 at the bottom of the first mounting frame 3 or the second mounting frame 4. The bottom edge of the triangular block 17 is fixedly connected to a pedal 18 extending toward the cavity opening direction of the equipment cavity 2, combined 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 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 descending of the triangular block 17 until its right vertical edge is used to abut against the strip-shaped 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 provided can be moved down by the "object" to be separated from the upper push rod 14 and located between the lower push rods 15, the "object" can generate pressure on the pedal 18 so that the telescopic end of the upper spring rod 16 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, or the serial plug 20 and the socket 12 in the plugged state can be separated.

[0042] Embodiment 6: The equipment cavity 2 is rotatably connected with a screw rod 6 driven by a motor and spanning the lower part of the first mounting frame 3 and several second mounting frames 4. The screw rod 6 is threadedly connected with a sliding block 5 that slides along the distribution direction of the first mounting frame 3 and several second mounting frames 4. The sliding block 5 that slides along the distribution direction of the first mounting frame 3 and several second mounting frames 4 is realized by driving the screw rod 6 to rotate by the motor to realize the sliding of the threadedly connected sliding block 5, so that the sliding block 5 can be moved to the front of the first mounting frame 3 or any second mounting frame 4. The upper surface of the sliding block 5 is plugged with an insert plate 27 that slides along the length direction perpendicular to the screw rod 6, and moves in and out of the first mounting frame 3 or any second mounting frame 4 through the insert plate 27. The upper surface of the insert plate 27 is plugged with a vertically lifting rack rack 30, and the side of the rack rack 30 is fixedly connected with a connecting plate 29 for pressing down the pedal 18, and the top edge of the rack rack 30 is fixedly connected with a push block 28 for abutting against the upper push rod 14 and the lower push rod 15. The push block 28 here is the "object" in the above description. When actually used, the insert plate 27 is used to enter and exit the first mounting frame 3 or any second mounting frame 4. A mounting frame 3 or any second mounting frame 4 is used to realize that the push block 28 on the mounting plug 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 plug plate 27 to realize the lifting and lowering of the push block 28, so that the push block 28 selectively contacts 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 convex column 33 for plugging with the socket 26. The push block 28 is continuously lowered until the convex column 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, so that the connecting arm 25 drives the rack plate 24 to move. The push block 28 moves in the up-down, front-back, and left-right directions. The electric telescopic rod 9 is arranged 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, the plug plate 27 on its surface, the electric telescopic rod 9 arranged on one side of the plug plate 27, and the push block 28 above will move left and right synchronously, and as shown in FIG. Figure 3 and Fig.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 frame 30. The plug plate 27 is provided with a through frame 7 penetrating the adjacent side edge 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 slidably plugged with 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. Fig.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 the boss 33 is connected to the socket 26, the connecting plate 29 will slide on the upper surface of the pedal 18.

[0043] The use method and working principle of the device are as follows: During installation, the AC power 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 bases 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 respectively electrically connected to the socket 12 and the connecting plug 11, and the input end of the AC power 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 socket 12. The socket 12 is also electrically connected to the connecting plug 11 in the same frame in a parallel manner, and the sliding block 5 is moved to each second installation 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 in the same frame extend out of the second installation frame 4, and so on, to realize that the adjacent sockets 12 of the two adjacent second installation frames 4 are plugged into the connecting plug 11, and then the sliding block 5 is moved to the front of the first installation frame 3. According to the usage scenario, when parallel connection is required, such as Fig.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 is lowered until the boss 33 is inserted into the insertion hole 26, and the connecting arm 25 drives the rack plate 24 to move as the push block 28 retreats, so that the meshing gear 23 drives the turntable 22 to rotate, thereby realizing the connection plug 11 and the serial plug 20 on the turntable 22 to 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 the serial connection can be realized.

[0044] The wiring diagram of the electric telescopic rod 9, motor storage, AC power grid isolation transformer, rectifier bridge circuit integrated board, full-bridge inverter circuit integrated board, LC filter circuit integrated board and transformer in the present invention belongs to the common knowledge in the field, and its working principle is a well-known technology. Its model is selected according to the actual use. The control mode and wiring arrangement of the electric telescopic rod 9, motor storage, AC power grid isolation transformer, rectifier bridge circuit integrated board, full-bridge inverter circuit integrated board, LC filter circuit integrated board and transformer are no longer explained in detail. Although the present invention is described in detail with reference to the above embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the above embodiments, or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope 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) at the bottom of the back of the console (1), a first installation frame (3) and four second installation frames (4) are arranged in the device cavity (2), bases (8) are slidably mounted 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) is used to install an AC power grid isolation transformer, and the bases (8) in the four second installation frames (4) are respectively used to install 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 from near to far from the first installation frame (3), and a series connection mechanism and a parallel connection mechanism are arranged in the base (8).

2. A high voltage AC fuse current characteristic test device according to claim 1, characterized in that: The parallel connection mechanism comprises 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 an 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 plurality of second installation frames (4) are respectively used for connecting the input end of a rectifier bridge circuit integrated board, a full-bridge inverter circuit integrated board, an LC filter circuit integrated board and a transformer; the connection plug (11) is respectively used for connecting the output end of a rectifier bridge circuit integrated board, a full-bridge inverter circuit integrated board, an LC filter circuit integrated board and a transformer; and the connection plug (11) at the far end of the first installation frame (3) is used for connecting a 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 serial connection mechanism comprises a turntable (22) rotatably mounted on the top right side of a base (8) in a first installation frame (3); a connection 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 an AC power grid isolation transformer, and the input end of the AC power grid isolation transformer and the connection plug (11) on the turntable (22) are connected in parallel to the socket (12) in the first installation frame (3).

4. A high voltage AC fuse current characteristic test device according to claim 3, characterized in that: The connection plug (11) and the serial connection plug (20) in the first installation frame (3) are plugged into the socket (12) of the adjacent second installation frame (4), and the connection plug (11) in any of the second installation frames (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.

5. A high voltage AC fuse current characteristic test device according to claim 4, characterized in that: The plug-in mechanism comprises two brackets (13) which are symmetrically distributed and 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 a connecting plug (11) and a 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); 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 opposite sides 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 sides are distributed in a V shape.

6. A high voltage AC fuse current characteristic test device according to claim 5, characterized in that: 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 manner.

7. A high voltage AC fuse current characteristic test device according to claim 6, characterized in that: The surface of the bracket (13) at the right side position in 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) meshingly connected to 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 a plug hole (26) is opened on the surface.

8. A high voltage AC fuse current characteristic test device according to claim 1, characterized in that: A limiting mechanism is also provided in the sliding base (8), the limiting mechanism comprising two spring rods (16) arranged opposite to each other at the end faces of the cylinder body and penetrating and fixedly connected to the bottom edge of the base (8); the spring rods (16) are arranged vertically, the telescopic end of the spring rod (16) at the upper position is fixedly connected to a triangular block (17), and the telescopic end of the spring rod (16) at the lower position is fixedly connected to a contact head (19) abutting against the bottom of the first installation frame (3) and the second installation frame (4); and the bottom edge of the triangular block (17) is fixedly connected to a pedal (18) extending toward the cavity opening of the equipment cavity (2).

9. 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 installation frame (3) and the lower part of the plurality of second installation 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 installation frame (3) and the plurality of second installation 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 rack rack (30) is provided for vertical lifting, a connecting plate (29) for pressing down a pedal (18) is fixedly connected to the side of the rack rack (30), a push block (28) for abutting against an upper push rod (14) and a lower push rod (15) is fixedly connected to the top of the rack rack (30), a convex column (33) for plugging into a socket (26) is fixedly connected to the bottom of the push block (28), and the push block (28) moves in the up-down, front-back, and left-right directions.

10. A high voltage AC fuse current characteristic test device according to claim 9, characterized in that: An electric telescopic rod (9) is arranged on one side of the plug plate (27) away from the first installation frame (3); a cylinder of the electric telescopic rod (9) is plugged into the bottom of the equipment chamber (2); an upper surface of the plug plate (27) is rotatably connected to a toothed ring (31) meshingly connected to a rack frame (30); a penetration frame (7) is penetrated through an adjacent side of the plug plate (27) close to the electric telescopic rod (9); a rectangular bar (32) is rotatably connected to the penetration frame (7) and is driven by a motor and is slidably plugged into the inner wall of the toothed ring (31).

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