Three-phase electric energy meter calibrating mutual inductor secondary side wiring terminal conversion device

Abstract

The application relates to a transformer secondary side wiring terminal conversion device for three-phase electric energy meter verification, relates to the technical field of electric power metering equipment verification, and comprises a base, the inner wall of the base is rotationally connected with a rotating rod, and the outer surface of the rotating rod is fixedly connected with a worm. The worm, the worm wheel, the bolt, the first spring and other components are arranged, when it is needed to replace electric energy meters with different wiring modes for verification, an operator rotates the rotating rod and the worm, the worm wheel is rotated with the first connecting piece, the protection shell can be rotated through the connection among the first connecting piece, the second connecting piece and the magnetic suction block, at the moment, the protection shell drives the bolt to move, when the bolt moves to the position of the corresponding limiting hole, the opening of the protection shell can leak out the corresponding wiring terminal row, the device can be flexibly replaced according to different three-phase electric energy meter wiring modes, a plurality of specifications and wiring modes can be adapted, the device versatility is improved, and the operation is convenient and fast.

Description

Technical Field

[0001] This application relates to the field of power metering equipment verification technology, and in particular to a transformer secondary side wiring terminal conversion device for three-phase power meter verification. Background Technology

[0002] Three-phase energy meters are instruments used to measure the energy consumption in three-phase AC circuits. They can simultaneously measure three-phase voltage and current, as well as calculate parameters such as active and reactive energy of the three-phase circuit. They are widely used in power metering in industrial, commercial, and large civil buildings to accurately record users' electricity consumption and provide a basis for electricity billing. Instrument transformers include current transformers and voltage transformers, which are special transformers used to transform voltage and current in power systems. The secondary side of the instrument transformer is used to connect the wiring parts of measuring instruments, protection devices, and other equipment. The current or voltage signal output from the secondary side of the instrument transformer is transmitted to the downstream equipment through these terminals.

[0003] However, it has been found in the existing technology that, due to the different specifications and wiring methods of three-phase energy meters, the existing verification devices have low versatility. Every time a different specification or wiring method of energy meter is changed for verification, a large number of wires need to be re-laid, which is cumbersome, time-consuming and labor-intensive. Utility Model Content

[0004] The purpose of this application is to provide a transformer secondary side wiring terminal conversion device for three-phase energy meter calibration, which has the advantages of being able to flexibly replace the wiring terminals according to different three-phase energy meter wiring methods, adapting to various specifications and wiring methods, improving the versatility of the device, and being convenient and quick to operate, thus solving the problems mentioned in the background art.

[0005] The three-phase energy meter calibration transformer secondary side terminal conversion device provided in this application adopts the following technical solution: It includes a base, a rotating rod rotatably connected to the inner wall of the base, a worm gear fixedly connected to the outer surface of the rotating rod, a worm wheel meshing with the outer surface of the worm gear, a first connecting member fixedly connected to the inner wall of the worm wheel, the outer surface of the first connecting member rotatably connected to the inner wall of the base, a second connecting member provided above the base, the second connecting member being adapted to the first connecting member, magnetic blocks fixedly installed on the inner walls of both the first and second connecting members, a protective shell fixedly connected to the top of the second connecting member, a pin slidably connected to the inner wall of the protective shell, a fixing plate fixedly connected to the outer surface of the pin, a first spring fixedly connected between the fixing plate and the protective shell, equidistantly arranged limiting holes on the upper surface of the base, the bottom end of the fixing plate being adapted to the corresponding limiting hole, and equidistantly arranged terminal blocks on the upper surface of the base.

[0006] By adopting the above technical solution, a rotating rod is set on the inner wall of the base, and the rotating rod is rotatably connected to the base to limit the rotation of the rotating rod. A worm gear is installed on the outer surface of the rotating rod and fixed to the rotating rod, allowing the operator to rotate the rotating rod to make the worm gear rotate. A worm wheel is set on the side of the worm gear, and the worm gear meshes with the worm gear, so that when the worm gear rotates, it can drive the worm wheel to rotate. A first connecting piece is set on the inner wall of the worm wheel, fixed to the worm wheel, and rotatably connected to the base, so that when the worm wheel rotates, it can drive the first connecting piece to rotate on the inner wall of the base. A second connecting piece is set on the top of the base, and the second connecting piece is adapted to the first connecting piece, so that the second connecting piece and the first connecting piece can be locked together. Magnetic blocks are set on the inner walls of the first and second connecting pieces, and the mutual attraction of the two magnetic blocks allows... The first and second connecting parts can be connected, so that when the worm gear drives the first connecting part to rotate, the second connecting part can rotate accordingly, thereby driving the protective shell at the top of the second connecting part to rotate as well. The pin is installed on the inner wall of the protective shell, which is set as a sliding connection, and a fixing plate is installed on the outer surface of the pin. A first spring is set between the fixing plate and the protective shell, so that the first spring can press against the fixing plate, so that the bottom end of the pin can be adapted to the corresponding limit hole. The upper surface of the base is provided with three sets of terminal blocks. When the fixing plate is adapted to the corresponding limit hole, the opening of the protective shell can expose the corresponding terminal block. By rotating the worm gear, the first connecting part can be rotated, so that the protective shell can be rotated and adjusted. It can be flexibly changed according to different three-phase energy meter wiring methods, adapting to the verification of three-phase energy meters of various specifications and wiring methods, improving the versatility of the device, and making the operation convenient and quick.

[0007] Preferably, each of the terminal blocks has two connecting blocks fixedly connected to its bottom surface.

[0008] By adopting the above technical solution, two connecting blocks are installed on the bottom surface of the terminal block. Each terminal block corresponds to a different three-phase energy meter wiring method. The terminal block and the connecting blocks are fixed so that the terminal block can move together with the connecting blocks.

[0009] Preferably, the upper surface of the base is provided with equidistant limiting grooves, and each limiting groove is adapted to a corresponding connecting block.

[0010] By adopting the above technical solution, the limiting groove is opened on the upper surface of the base to achieve the positioning of the limiting groove. The limiting groove is adapted to the corresponding connecting block, so that the terminal block can be inserted into the corresponding limiting groove through the connecting block, thereby achieving the positioning and installation of the terminal block.

[0011] Preferably, the base has cavities arranged at equal intervals inside, and each cavity has a slider slidably connected to its inner wall.

[0012] By adopting the above technical solution, the cavity is opened inside the base to achieve the positioning of the cavity. A slider is set inside the cavity, and the slider and the cavity are set as a sliding connection to achieve the limiting of the slider.

[0013] Preferably, each of the sliders has a locking block fixedly connected to the side of each slider that is close to each other, and each locking block is adapted to a corresponding connecting block.

[0014] By adopting the above technical solution, the locking block is installed on the side of the slider that is close to each other, and set as a fixed connection, so that the locking block can move with the slider. The locking block can also be adapted to the groove on the surface of the connecting block, so that the locking block can be locked into the groove on the surface of the connecting block, thereby achieving the locking of the connecting block.

[0015] Preferably, each slider has a pull rod fixedly connected to its opposite side, the outer surface of each pull rod is slidably connected to the inner wall of the base, and the other end of each pull rod is fixedly connected to a pull block.

[0016] By adopting the above technical solution, the pull rod is installed on the side of the slider that is far away from each other, and is set as a fixed connection. The pull rod and the base are set as a sliding connection to realize the limit of the pull rod. The pull block is installed on the other end of the pull rod, so that when the operator pulls the pull block, the slider can be moved by the pull rod, thereby allowing the locking block to disengage from the connecting block.

[0017] Preferably, each of the sliders has two second springs fixedly connected to its opposite side, and the other end of each second spring is fixedly connected to the inner wall of the corresponding cavity.

[0018] By adopting the above technical solution, the second spring is installed on the side of the slider that is far apart from each other, and is set as a fixed connection. The other end of the second spring is connected to the corresponding cavity, so that the slider can be pressed by the second spring. When the connecting block is inserted into the limiting groove, the locking block moves first and the second spring is compressed. After the connecting block is installed in place, the locking block can be quickly reset by the second spring, realizing automatic locking of the connecting block, so that the terminal block can be installed quickly.

[0019] Preferably, each slider has two guide rods slidably connected to its inner wall, and the end of each guide rod is fixedly connected to the inner wall of the corresponding cavity.

[0020] By adopting the above technical solution, the guide rod is installed on the inner wall of the slider, and the end of the guide rod is fixed to the inner side wall of the cavity. Through the sliding connection between the guide rod and the slider, the secondary positioning of the slider is achieved, thereby improving the stability of the slider when it moves.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] This three-phase energy meter calibration transformer secondary side terminal conversion device, through the inclusion of components such as a worm gear, worm wheel, pin, and first spring, allows the operator to rotate the rotating rod and worm gear when calibrating an energy meter with a different wiring method. This causes the worm wheel and the first connecting piece to rotate, and through the connection between the first connecting piece, the second connecting piece, and the magnetic block, the protective shell can rotate. The protective shell then moves the pin. When the pin moves to the corresponding limit hole position, the opening of the protective shell allows the corresponding terminal to be exposed. This allows the device to flexibly change the wiring of different three-phase energy meters, adapting to various specifications. The improved wiring method enhances the device's versatility and makes operation convenient and quick. When installing the terminal block, moving the terminal block inserts the connecting block into the corresponding limiting slot. At this time, the locking block moves under the action of the connecting block and compresses the second spring. When the connecting block is installed in place, the second spring causes the slider to quickly return to its original position, allowing the locking block to be inserted into the corresponding connecting block, thus quickly locking the connecting block and achieving rapid installation of the terminal block. Conversely, pulling the corresponding pull block disengages the locking block from the connecting block, allowing the terminal block to be disassembled. This device enables quick installation and removal of the terminal block, eliminating the need for cumbersome bolt connections. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the entire application in three dimensions;

[0024] Figure 2 This is a schematic diagram of the overall front view of this application;

[0025] Figure 3 This is a structural diagram illustrating the connection relationship between the first connector and the second connector in this application.

[0026] Figure 4 This is a schematic diagram of the connection between the worm and the worm wheel in this application;

[0027] Figure 5 This is a schematic diagram of the connection between the slider and the second spring in this application.

[0028] In the picture:

[0029] 1. Base; 2. Rotating rod; 3. Worm gear; 4. Worm wheel; 5. First connecting piece; 6. Second connecting piece; 7. Magnetic block; 8. Protective shell; 9. Pin; 10. Fixing plate; 11. First spring; 12. Limiting hole; 13. Terminal block; 14. Connecting block; 15. Cavity; 16. Slider; 17. Locking block; 18. Pull rod; 19. Pulling block; 20. Second spring; 21. Guide rod; 22. Limiting groove. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0031] Example 1: Transformer secondary side wiring terminal conversion device for three-phase energy meter calibration, please refer to... Figure 2 , Figure 3 and Figure 4 The system includes a base 1, with a rotating rod 2 rotatably connected to the inner wall of the base 1. The rotating rod 2 is rotatably connected to the base 1 to limit its movement. A worm gear 3 is fixedly connected to the outer surface of the rotating rod 2. The worm gear 3 is mounted on the outer surface of the rotating rod 2 and fixed to the rotating rod 2, allowing the operator to rotate the rotating rod 2 to rotate the worm gear 3. A worm wheel 4 meshes with the outer surface of the worm gear 3. The worm wheel 4 is located on the side of the worm gear 3, and the worm gear 3 meshes with the worm wheel 4 so that when the worm gear 3 rotates, it drives the worm wheel 4 to rotate. The inner surface of the worm wheel 4... A first connector 5 is fixedly connected to the wall. The outer surface of the first connector 5 is rotatably connected to the inner wall of the base 1. The first connector 5 is set on the inner wall of the worm gear 4, fixing the first connector 5 to the worm gear 4 and setting the first connector 5 to the base 1 as a rotatable connection, so that when the worm gear 4 rotates, it can drive the first connector 5 to rotate on the inner wall of the base 1. A second connector 6 is provided above the base 1. The second connector 6 is adapted to the first connector 5. The second connector 6 is set above the base 1 and adapted to the first connector 5, so that the second connector 6 and the first connector 5 can be locked together.

[0032] Please see Figure 1 , Figure 3 and Figure 4Magnetic blocks 7 are fixedly installed on the inner walls of both the first connecting member 5 and the second connecting member 6. A protective shell 8 is fixedly connected to the top of the second connecting member 6. The magnetic blocks 7 are installed on the inner walls of the first connecting member 5 and the second connecting member 6. Through the mutual attraction of the two magnetic blocks 7, the first connecting member 5 and the second connecting member 6 can be connected. Thus, when the worm gear 4 drives the first connecting member 5 to rotate, the second connecting member 6 can rotate accordingly, thereby driving the protective shell 8 at the top of the second connecting member 6 to rotate as well. A pin 9 is slidably connected to the inner wall of the protective shell 8. A fixing plate 10 is fixedly connected to the outer surface of the pin 9. A first spring 11 is fixedly connected between the fixing plate 10 and the protective shell 8. The upper surface of the base 1 has equidistantly arranged limiting holes 12. The bottom end of the fixing plate 10 is adapted to the corresponding limiting hole 12. The upper surface of the base 1 is provided with… The terminal blocks 13 are arranged at equal intervals. The pins 9 are installed on the inner wall of the protective shell 8 and are configured as sliding connections. A fixing plate 10 is installed on the outer surface of the pins 9. A first spring 11 is set between the fixing plate 10 and the protective shell 8 so that the first spring 11 can press against the fixing plate 10, so that the bottom end of the pins 9 can be adapted to the corresponding limiting hole 12. The upper surface of the base 1 is provided with three sets of terminal blocks 13. When the fixing plate 10 is adapted to the corresponding limiting hole 12, the opening of the protective shell 8 can expose the corresponding terminal block 13. By rotating the worm gear 3, the first connecting piece 5 is rotated, so that the protective shell 8 can be rotated and adjusted. It can be flexibly changed according to different three-phase energy meter wiring methods, adapting to the verification of three-phase energy meters of various specifications and wiring methods, improving the versatility of the device, and making the operation convenient and quick.

[0033] Example 2: Transformer secondary side wiring terminal conversion device for three-phase energy meter calibration, please refer to [link / reference]. Figure 4 and Figure 5 Each terminal block 13 has two connecting blocks 14 fixedly connected to its bottom surface. Each terminal block 13 corresponds to a different three-phase energy meter wiring method. The terminal block 13 is fixed to the connecting blocks 14 so that the terminal block 13 can move together with the connecting blocks 14. The upper surface of the base 1 has equidistantly arranged limiting grooves 22. Each limiting groove 22 is adapted to the corresponding connecting block 14. The limiting grooves 22 are opened on the upper surface of the base 1 to achieve positioning of the limiting grooves 22. The limiting grooves 22 are adapted to the corresponding connecting blocks 14 so that the terminal block 13 can be inserted into the corresponding limiting groove 22 through the connecting blocks 14, thereby achieving the positioning and installation of the terminal block 13.

[0034] Please see Figure 4 and Figure 5The base 1 has equidistantly arranged cavities 15 inside. Each cavity 15 has a slider 16 slidably connected to its inner wall. The cavities 15 are positioned within the base 1. The sliders 16 are slidably connected to the cavities 15 to limit their movement. Each slider 16 has a locking block 17 fixedly connected to its adjacent side. Each locking block 17 is adapted to a corresponding connecting block 14. The locking blocks 17 are fixedly installed on the adjacent sides of the sliders 16, allowing them to move with the sliders 16. Furthermore, the locking blocks 17 fit into the grooves on the surface of the connecting blocks 14. The locking block 17 can be engaged in the groove on the surface of the connecting block 14, thereby locking the connecting block 14. Each slider 16 is fixedly connected to a pull rod 18 on the side away from each other. The outer surface of each pull rod 18 is slidably connected to the inner wall of the base 1. The other end of each pull rod 18 is fixedly connected to a pull block 19. The pull rod 18 is installed on the side away from each other of the slider 16, which is a fixed connection. The pull rod 18 is slidably connected to the base 1, which limits the pull rod 18. The pull block 19 is installed on the other end of the pull rod 18, so that when the operator pulls the pull block 19, the slider 16 can be moved through the pull rod 18, thereby allowing the locking block 17 to disengage from the connecting block 14.

[0035] Please see Figure 4 and Figure 5 Each slider 16 has two second springs 20 fixedly connected to its opposite side. The other end of each second spring 20 is fixedly connected to the inner wall of the corresponding cavity 15. The second springs 20 are installed on the opposite sides of the sliders 16, forming a fixed connection, and the other end of the second spring 20 is connected to the corresponding cavity 15, so that the sliders 16 can be pressed together by the second springs 20. Therefore, when the connecting block 14 is inserted into the limiting groove 22, the locking block 17 moves first, and the second springs 20 are compressed. After the connecting block 14 is installed in place, the second springs 20 are compressed. Spring 20 enables the locking block 17 to quickly reset, achieving automatic locking of the connecting block 14 and allowing the terminal block 13 to be installed quickly. Each slider 16 has two guide rods slidably connected to its inner wall. The end of each guide rod 21 is fixedly connected to the inner wall of the corresponding cavity 15. By installing the guide rods 21 on the inner wall of the slider 16 and fixing the ends of the guide rods 21 to the inner wall of the cavity 15, the slider 16 is secondary limited through the sliding connection between the guide rods 21 and the slider 16, thereby improving the stability of the slider 16 when it moves.

[0036] The implementation principle of this application embodiment is as follows: First, the corresponding terminal block 13 is moved to move the connecting block 14, inserting the connecting block 14 into the corresponding limiting groove 22 to achieve positioning and installation of the connecting block 14. At this time, the locking block 17 slides together with the slider 16 and compresses the second spring 20. After the connecting block 14 is installed in place, the locking block 17 quickly resets under the action of the second spring 20, thereby locking the connecting block 14 and achieving the installation of the terminal block 13. Then, the first connecting member 5 and the second connecting member 6 are connected by magnetic attraction block 7. When it is necessary to replace the energy meter with a different wiring method for testing, first pull up the pin 9 to disengage the pin 9 from the limiting hole 12, and then... Rotating the rotating rod 2 causes the worm gear 3 to rotate, which in turn causes the worm wheel 4 to rotate. The worm wheel 4 is fixed to the first connecting member 5, which in turn causes the first connecting member 5 to drive the second connecting member 6 to rotate. The second connecting member 6 allows the protective shell 8 to rotate. When the pin 9 moves to the corresponding limiting hole 12, the first spring 11 causes the pin 9 to be inserted into the limiting hole 12. If the terminal block 13 is not the one that needs to be used, the above operation is repeated until the opening of the protective shell 8 can expose the terminal block 13 that needs to be used. This allows the device to be flexibly changed according to different three-phase energy meter wiring methods, adapting to various specifications and wiring methods, improving the versatility of the device, and making the operation convenient and quick.

Claims

1. A converter for the secondary side wiring terminals of a current transformer used for three-phase energy meter calibration, comprising a base (1), characterized in that: A rotating rod (2) is rotatably connected to the inner wall of the base (1). A worm gear (3) is fixedly connected to the outer surface of the rotating rod (2). A worm wheel (4) meshes with the outer surface of the worm gear (3). A first connecting piece (5) is fixedly connected to the inner wall of the worm wheel (4). The outer surface of the first connecting piece (5) is rotatably connected to the inner wall of the base (1). A second connecting piece (6) is provided above the base (1). The second connecting piece (6) is adapted to the first connecting piece (5). Magnetic blocks are fixedly installed on the inner walls of both the first connecting piece (5) and the second connecting piece (6). (7) A protective shell (8) is fixedly connected to the top of the second connector (6). A pin (9) is slidably connected to the inner wall of the protective shell (8). A fixing piece (10) is fixedly connected to the outer surface of the pin (9). A first spring (11) is fixedly connected between the fixing piece (10) and the protective shell (8). A limiting hole (12) is provided on the upper surface of the base (1). The bottom end of the fixing piece (10) is adapted to the corresponding limiting hole (12). A terminal block (13) is provided on the upper surface of the base (1).

2. The transformer secondary side wiring terminal conversion device for three-phase energy meter calibration according to claim 1, characterized in that: Two connecting blocks (14) are fixedly connected to the bottom surface of each terminal block (13).

3. The transformer secondary side wiring terminal conversion device for three-phase energy meter calibration according to claim 2, characterized in that: The upper surface of the base (1) is provided with equidistant limiting grooves (22), each of which is adapted to the corresponding connecting block (14).

4. The transformer secondary side wiring terminal conversion device for three-phase energy meter calibration according to claim 1, characterized in that: The base (1) has cavities (15) arranged at equal intervals inside, and each cavity (15) has a slider (16) slidably connected to its inner wall.

5. The transformer secondary side wiring terminal conversion device for three-phase energy meter calibration according to claim 4, characterized in that: Each of the sliders (16) has a locking block (17) fixedly connected to the side of each slider (16) that is close to each other, and each locking block (17) is adapted to the corresponding connecting block (14).

6. The transformer secondary side wiring terminal conversion device for three-phase energy meter calibration according to claim 4, characterized in that: Each slider (16) has a pull rod (18) fixedly connected to the side away from each other. The outer surface of each pull rod (18) is slidably connected to the inner wall of the base (1). The other end of each pull rod (18) is fixedly connected to a pull block (19).

7. The transformer secondary side wiring terminal conversion device for three-phase energy meter calibration according to claim 4, characterized in that: Each slider (16) has two second springs (20) fixedly connected to the opposite side of each other, and the other end of each second spring (20) is fixedly connected to the inner wall of the corresponding cavity (15).

8. The transformer secondary side wiring terminal conversion device for three-phase energy meter calibration according to claim 4, characterized in that: Each slider (16) has two guide rods (21) slidably connected to its inner wall, and the end of each guide rod (21) is fixedly connected to the inner wall of the corresponding cavity (15).

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