An electronic current transformer full-automatic calibration device

Abstract

The present invention discloses a full-automatic calibration device for electronic current transformers, which relates to the technical field of transformer calibration devices. It includes a calibration and detection structure. The calibration and detection structure includes a chassis. One side of the chassis is provided with a disassembly opening, and a disassembly main board is connected at the disassembly opening. There are several limit grooves on the upper inner wall of the chassis, and several limit insertion blocks are provided on the disassembly main board. The limit insertion blocks can be inserted into the limit grooves. The disassembly main board is provided with a first connection socket and a control panel. The control panel is provided with a display screen. A calibration component is arranged in the calibration and detection structure. The calibration component includes a protection board seat. The protection board seat is placed inside the chassis. A circuit board is arranged at the bottom inside the protection board seat. A control chip is arranged on the circuit board. A control switch is arranged on the side wall of the chassis. The first connection socket and the control panel are both electrically connected to the circuit board. The structure of the present invention is simple and easy to disassemble.

Description

Technical Field

[0001] The present invention relates to the technical field of instrument transformer calibration devices, and in particular to a full-automatic calibration device for electronic instrument transformers. Background Art

[0002] Digital (optoelectronic) instrument transformers, as the bridge between the analog world and the digital world, play a crucial role in digital substations. It can be considered that digital (optoelectronic) instrument transformers are the cornerstone of digital substations, and all digital quantities originate from them. Therefore, the accuracy and performance of digital (optoelectronic) instrument transformers are very important. China's Metrology Law stipulates that all measuring instruments must be calibrated, that is, all measuring instruments must be able to achieve traceability of measurement values. Therefore, in practical applications, it is necessary to calibrate digital (optoelectronic) instrument transformers, and it is also necessary to calibrate them after on-site installation to verify their measurement accuracy and stability, as well as the correctness of the support for the IEC61850 protocol.

[0003] According to Chinese Patent Publication No. CN203385848U, which relates to the technical field of instrument transformer calibrators, a smart full-automatic instrument transformer calibrator is disclosed, including a voltage / current test module, a control module, a display module, and a smart controller; the voltage / current test module is connected to the control module; the control module is provided with an output port that can be connected to the input end of the measured instrument transformer; the display module is provided with a loop port connected to the output end of the measured instrument transformer, and a loop can be formed through the measured instrument transformer and the output port; the voltage / current test module, the control module, and the display module are all connected to the smart controller; the smart controller can control the voltage / current test module, the control module, and the display module to automatically complete the work according to a pre-set program.

[0004] Existing full-automatic calibration devices for electronic instrument transformers are fixedly installed. Due to the fixed setting, subsequent maintenance and disassembly work cannot be carried out.

[0005] Therefore, there is an urgent need in the art for a new type of full-automatic calibration device for electronic instrument transformers to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a full-automatic calibration device for electronic instrument transformers to solve the problems existing in the above-mentioned prior art. The calibration and detection structure is a split structure, which is convenient for assembly and disassembly.

[0007] To achieve the above object, the present invention provides the following solution:

[0008] The present invention discloses a full-automatic calibration device for electronic transformers, including a calibration and detection structure. The calibration and detection structure includes a chassis. One side of the chassis is provided with a disassembly opening, and a disassembly main board is connected at the disassembly opening. A number of limiting grooves are provided on the upper inner wall of the chassis, and a number of limiting insertion blocks are provided on the disassembly main board. The limiting insertion blocks can be inserted into the limiting grooves. The disassembly main board is provided with a first connection socket and a control panel, and a display screen is provided on the control panel. A calibration component is provided inside the calibration and detection structure. The calibration component includes a protection board seat. The protection board seat is placed inside the chassis. A circuit board is provided at the bottom inside the protection board seat, and a control chip is provided on the circuit board. A control switch is provided on the side wall of the chassis. The first connection socket and the control panel are both electrically connected to the circuit board.

[0009] Preferably, the calibration and detection structure further includes a protection plate. The protection plate is arranged between the chassis and the disassembly main board. The protection plate is provided with a socket limiting through hole and a panel limiting through hole. The first connection socket can be inserted into the socket limiting through hole, and the control panel can be inserted into the panel limiting through hole.

[0010] Preferably, a first protection frame and a second protection frame are further installed on the outside of the chassis. The first protection frame is installed at the docking seam between the disassembly main board and the chassis, and the second protection frame is installed on the side of the chassis away from the disassembly opening.

[0011] Preferably, push-pull handles are fixed on both sides of the disassembly main board.

[0012] Preferably, a handle is provided at the upper end of the chassis.

[0013] Preferably, a number of second connection sockets are further provided on the side wall of the chassis. The second connection sockets can be electrically connected to the circuit board.

[0014] Preferably, a number of first connectors are provided on the surface of the protection board seat close to the disassembly main board. The first connection socket and the control panel are both electrically connected to the circuit board through the first connectors;

[0015] A number of second connectors are provided on the surface of the protection board seat close to the second connection socket. The control switch and the second connection socket are both electrically connected to the circuit board through the second connectors.

[0016] Preferably, a capacitor is installed on the circuit board.

[0017] Preferably, a number of fitting frames are installed on the circuit board. The upper end of the fitting frame is connected with a limit fitting frame through an elastic telescopic device. The limit fitting frame can extend into the limit groove.

[0018] Preferably, exhaust fan bases and intake fan bases are respectively installed on both sides of the top of the chassis. Both the exhaust fan bases and the intake fan bases are communicated with the interior of the chassis. The exhaust fan bases are connected with exhaust air ducts, the intake fan bases are connected with intake air ducts, and exhaust fans are provided on the exhaust fan bases.

[0019] The present invention has achieved the following technical effects compared with the prior art:

[0020] In the present invention, the circuit board is installed on the protection board base. Electrical components such as the circuit board and the control chip are arranged on the protection board base. The protection board base is placed inside the chassis, and a disassembly main board is inserted at the disassembly opening of the chassis. When internal maintenance is required, only the disassembly main board needs to be pulled out, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of the full-automatic calibration equipment for electronic current transformers according to an embodiment of the present invention;

[0023] Figure 2 It is a side view of the full-automatic calibration equipment for electronic current transformers according to an embodiment of the present invention;

[0024] Figure 3 It is a rear view of the full-automatic calibration equipment for electronic current transformers according to an embodiment of the present invention;

[0025] Figure 4 It is an exploded view of the full-automatic calibration equipment for electronic current transformers according to an embodiment of the present invention;

[0026] Figure 5 It is an exploded view of the calibration detection structure in the full-automatic calibration equipment for electronic current transformers according to an embodiment of the present invention;

[0027] Figure 6 It is an exploded view of the calibration components in the full-automatic calibration equipment for electronic current transformers according to an embodiment of the present invention;

[0028] In the figure: 1 - calibration detection structure; 2 - first connection socket; 3 - display screen; 4 - control panel; 5 - first protective frame; 6 - second protective frame; 7 - protective plate; 8 - calibration component; 9 - handle; 10 - exhaust fan base; 11 - exhaust duct; 12 - first connector; 13 - circuit board; 14 - capacitor; 15 - fitting frame; 16 - elastic telescopic device; 17 - limit adapter frame; 18 - second connector; 19 - protective plate base; 20 - control chip; 21 - control switch; 22 - chassis; 23 - second connection socket; 24 - intake duct; 25 - intake fan base. Detailed implementation

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] The purpose of the present invention is to provide a fully automatic calibration device for electronic current transformers to solve the problems existing in the above-mentioned prior art. The calibration detection structure is a split structure, which is convenient for assembly and disassembly.

[0031] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] As Figures 1 - 6As shown in the figure, this embodiment provides a full-automatic calibration device for electronic current transformers, including a calibration and detection structure 1. The calibration and detection structure 1 includes a chassis 22. One side (i.e., the front side) of the chassis 22 is provided with a disassembly opening, and a disassembly main board is connected at the disassembly opening. In order to achieve the detachable connection of the disassembly main board, several limit grooves are provided on the upper inner wall of the chassis 22. The limit grooves are rectangular strip-shaped grooves, and one end of them extends to the front side of the chassis 22. It can be understood that one end of them is open. Several limit inserts are provided on the disassembly main board, and the number of limit inserts is the same as and corresponds to the number of limit grooves one by one. In this embodiment, both the limit inserts and the limit grooves are two, and the two limit inserts can be respectively inserted into one end of the two limit grooves. The disassembly main board is provided with a first connection socket 2 and an operation panel 4. The first connection socket 2 is used to connect the current transformer, and the operation panel 4 is provided with a display screen 3 for displaying relevant information. A calibration component 8 is provided inside the calibration and detection structure 1. The calibration component 8 includes a protection board seat 19. The protection board seat 19 is a box-shaped structure with an open upper end, and the protection board seat 19 is placed inside the chassis 22. A circuit board 13 is provided at the bottom inside the protection board seat 19, and a control chip 20 is provided on the circuit board 13 for data analysis. A control switch 21 is provided on the side wall of the chassis 22, and the control switch 21 is used to control the switch of the entire device. The first connection socket 2 and the operation panel 4 are both electrically connected to the circuit board 13, so as to transmit relevant data to the control chip 20 on the circuit board 13.

[0033] During actual use, only need to align the limit inserts on the disassembly main board with the open ends of the limit grooves, and then the disassembly main board can be pushed in, which is simple and convenient.

[0034] In this embodiment, as Figure 5 shown, the calibration and detection structure 1 further includes a protection plate 7, and the protection plate 7 is arranged between the chassis 22 and the disassembly main board. Specifically, the protection plate 7 is provided with socket limit through holes and panel limit through holes. The number of socket limit through holes is the same as that of the first connection sockets 2, and 3-4 are sufficient. And the back of the first connection socket 2 can be inserted into the socket limit through holes. Similarly, the operation panel 4 can be inserted into the panel limit through holes.

[0035] In this embodiment, a first protection frame 5 and a second protection frame 6 are further installed outside the chassis 22. Both the first protection frame 5 and the second protection frame 6 are rectangular frames. The first protection frame 5 is installed at the docking seam between the disassembly main board and the chassis 22, which can not only protect the chassis 22, but also prevent the disassembly main board from separating from the chassis 22. The second protection frame 6 is installed on the side of the chassis 22 away from the disassembly opening, and also plays a role in protecting the chassis 22.

[0036] In this embodiment, push-pull handles are fixed on both sides of the disassembly main board, and the staff can push and pull the disassembly main board through the push-pull handles to achieve the pushing in and pulling out of the disassembly main board.

[0037] In this embodiment, a handle 9 is provided at the upper end of the chassis 22. The staff can lift the calibration and detection structure 1 through the handle 9, which is convenient for carrying.

[0038] In this embodiment, a plurality of second connection sockets 23 are further provided on the side wall of the chassis 22. The second connection sockets 23 can be electrically connected to the circuit board 13. The purpose of setting the second connection sockets 23 is that the first connection socket 2 is different from the second connection sockets 23, so as to be used to connect different devices. Specifically, the first connection socket 2 can be a TRS socket, and the second connection sockets 23 can be pin headers. Of course, those skilled in the art can completely select the required sockets according to actual needs, not limited to these two types only.

[0039] In this embodiment, a plurality of first connectors 12 are provided on the surface of the protection board seat 19 close to the disassembled main board. The number of the first connectors 12 matches the number of the first connection socket 2 and the control panel 4. Both the first connection socket 2 and the control panel 4 are electrically connected to the circuit board 13 through the first connectors 12.

[0040] A plurality of second connectors 18 are provided on the surface of the protection board seat 19 close to the second connection sockets 23. The number of the second connectors 18 matches the number of the control switches 21 and the second connection sockets 23. Both the control switches 21 and the second connection sockets 23 are electrically connected to the circuit board 13 through the second connectors 18.

[0041] The reason for setting the first connectors 12 and the second connectors 18 is to achieve the electrical connection between the first connection socket 2, the control panel 4, the control switches 21 and the second connection sockets 23 and the circuit board 13. Therefore, both the first connectors 12 and the second connectors 18 are conductive devices, specifically, they can be flexible connectors, and further can be FFC / FPC flexible connectors. Of course, those skilled in the art can also replace them with components that can conduct electricity, not limited to this type only.

[0042] In this embodiment, a capacitor 14 is installed on the circuit board 13. Through the capacitor 14, electric energy can be transmitted, and a specified current and voltage can be emitted, acting on the mutual inductor. The mutual inductor conducts measurement, and the control chip 20 can analyze the deviation therebetween, which is convenient for subsequent calibration processing work. In addition, the circuit board 13 can also be connected with a power supply plug for plugging into an external power supply to supply power to the entire device.

[0043] In this embodiment, several fitting racks 15 are installed on the circuit board 13. Specifically, there are two rows of fitting racks 15, and the positions of the two rows of fitting racks 15 correspond one by one to the limiting grooves. Each row is provided with 4-5 fitting racks 15. The upper end of each fitting rack 15 is connected with a limiting adapter rack 17 through an elastic telescopic device 16. The elastic telescopic device 16 can be a hydraulic buffer or a hydraulic spring. When the protection plate seat 19 is placed inside the chassis 22, the limiting adapter rack 17 can extend into the limiting groove. Under the compression reaction force of the elastic telescopic device 16, the elastic telescopic device 16 can push the limiting adapter rack 17 upward, so that the limiting adapter rack 17 can tightly abut against the limiting groove. The relatively large frictional force can prevent the protection plate seat 19 from moving, and the two rows of limiting adapter racks 17 can also play a role in limiting and aligning the circuit board 13.

[0044] In this embodiment, exhaust fan seats 10 and intake fan seats 25 are respectively installed on both sides of the top of the chassis 22. An exhaust air passage is provided on the exhaust fan seat 10, and an intake air passage is provided on the intake fan seat 25. One end of the exhaust air passage in the exhaust fan seat 10 and one end of the intake air passage in the intake fan seat 25 are both connected to the inside of the chassis 22. The end of the exhaust air passage in the exhaust fan seat 10 far from the inside of the chassis 22 is connected with an exhaust air pipe 11, and the end of the intake air passage in the intake fan seat 25 far from the chassis 22 is connected with an intake air pipe 24. An exhaust fan is provided at one end of the exhaust air passage in the exhaust fan seat 10 close to the chassis 22. During actual use, by starting the exhaust fan, the outside cold air can enter the chassis 22 through the intake air pipe 24 and the intake air passage on the intake fan seat 25, so as to cool the circuit board 13 and each component thereon. The heated air after heat exchange is then discharged back to the outside atmosphere through the exhaust air passage and the exhaust air pipe 11 on the exhaust fan seat 10.

[0045] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An electronic transformer automatic calibration device, characterized in that: The invention comprises a verification and detection structure (1), wherein the verification and detection structure (1) comprises a chassis (22), a disassembly opening being provided on one side of the chassis (22), a disassembly mainboard being connected to the disassembly opening, a plurality of limit grooves being provided on the inner wall of the upper end of the chassis (22), a plurality of limit plugs being provided on the disassembly mainboard, the limit plugs being capable of being inserted into the limit grooves, a first connection socket (2) and a control panel (4) being provided on the disassembly mainboard, a display screen (3) being provided on the control panel (4), a verification component (8) being provided inside the verification and detection structure (1), the verification component (8) comprising a protection plate seat (19), the protection plate seat (19) being placed inside the chassis (22), a circuit board (13) being provided at the bottom inside the protection plate seat (19), a control chip (20) being provided on the circuit board (13), a control switch (21) being provided on the side wall of the chassis (22), and the first connection socket (2) and the control panel (4) being both electrically connected to the circuit board (13); The verification and detection structure (1) further comprises a protection plate (7), wherein the protection plate (7) is arranged between the chassis (22) and the disassembled mainboard, and the protection plate (7) is provided with a socket limiting through hole and a panel limiting through hole, wherein the first connection socket (2) can be inserted into the socket limiting through hole, and the control panel (4) can be inserted into the panel limiting through hole; A plurality of second connection sockets (23) are also provided on the side wall of the chassis (22), and the second connection sockets (23) can be electrically connected to the circuit board (13); A plurality of first connectors (12) are provided on a surface of the protection board seat (19) close to the disassembled main board, and the first connection socket (2) and the control panel (4) are both electrically connected to the circuit board (13) via the first connectors (12); a plurality of second connectors (18) are provided on a surface of the protection board seat (19) close to the second connection socket (23), and the control switch (21) and the second connection socket (23) are both electrically connected to the circuit board (13) via the second connectors (18); A plurality of laminating frames (15) are mounted on the circuit board (13); the upper ends of the laminating frames (15) are connected to a position-limiting adapter frame (17) via an elastic telescopic device (16); and the position-limiting adapter frame (17) can extend into the position-limiting groove; A first protective frame (5) and a second protective frame (6) are also installed on the outer side of the chassis (22); the first protective frame (5) is installed at the joint between the disassembled mainboard and the chassis (22); and the second protective frame (6) is installed on a side of the chassis (22) away from the disassembly opening.

2. The fully automatic calibration equipment for electronic transformers according to claim 1 is characterized in that: Push-pull handles are fixed on both sides of the disassembly mainboard.

3. The fully automatic calibration equipment for electronic transformers according to claim 1 is characterized in that: A handle (9) is provided at the upper end of the chassis (22).

4. The fully automatic calibration equipment for electronic transformers according to claim 1 is characterized in that: The circuit board (13) is equipped with a capacitor (14).

5. The fully automatic calibration equipment for electronic transformers according to claim 1 is characterized in that: An exhaust fan base (10) and an air inlet base (25) are respectively installed on both sides of the top of the chassis (22); the exhaust fan base (10) and the air inlet base (25) are both connected to the interior of the chassis (22); the exhaust fan base (10) is connected to an exhaust duct (11); the air inlet base (25) is connected to an air inlet duct (24); and an exhaust fan is provided on the exhaust fan base (10).

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