Electromagnetic voltage transformer

Abstract

The invention provides an electromagnetic voltage transformer, which relates to the technical field of high-voltage measurement of an electric power system, and comprises a transformer main body, a butt joint base is arranged below the transformer main body, two butt joint plug-in frames are fixedly connected below the transformer main body, and inner positioning flanges are arranged in the two butt joint plug-in frames. And unlocking assemblies are arranged in the two butt joint sockets. Through the arrangement of the clamping assembly, when the guide assembly is pushed to enable the clamping assembly to clamp a copper bar, counter-acting force can extrude a second elastic piece, so that a piston extrudes gas in a sliding groove, when the voltage transformer vibrates, the vibration frequency can be offset through the elastic force of the second elastic piece, and the clamping assembly is prevented from loosening; when the voltage rises and the current is increased to generate heat, and the gas in the sliding groove expands after being heated, the piston is synchronously extruded to move towards the copper bar direction, and the second elastic piece is extruded for adjustment, so that the vibration reduction effect is further improved, and the detection efficiency of the electric power system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage measurement in power systems, and particularly to an electromagnetic voltage transformer. Background Art

[0002] Voltage transformers are commonly used for high-voltage measurement and current measurement in power systems. The working principle of a voltage transformer is based on the principle of electromagnetic induction. When a high voltage is applied to the primary winding, a magnetic flux is generated in the iron core. According to Faraday's law of electromagnetic induction, the induced electromotive force is proportional to the rate of change of the magnetic flux. Since the number of turns of the secondary winding is much less than that of the primary winding, the voltage in the secondary winding will be significantly reduced. This turns ratio determines the ratio of voltage conversion. According to the voltage transformation ratio of the voltage transformer and the values measured by the voltmeter and ammeter, the current or voltage in the measured load can be calculated. An open-type voltage transformer is a special electrical measuring device that can enclose and seal the measured copper bar by adjusting its own structure, and the electromagnetic induction is generated by the transformer surrounding the copper bar to achieve current detection.

[0003] Chinese Patent with application number CN201910536487.8 discloses an open-type current transformer that is easy to install, including a transformer body and an elastic band. The transformer body is provided in a split type, and a through hole for the wire to pass through is left between the upper half and the lower half of the transformer body. A fixing member for opening or closing the through hole is provided between the upper half and the lower half; the elastic band is provided on one side of the lower half, the elastic band bypasses the bottom end of the lower half and is detachably connected to the other side of the lower half, and a detachable part is provided at the detachable connection between the elastic band and the lower half. The open-type current transformer provided by the present invention is fixed on the mounting plate by bypassing the elastic band from one side of the transformer body around the bottom end of the transformer body and then fixing it to the other side of the transformer body, with the mounting plate located between the elastic band and the transformer body, thus facilitating the installation between the transformer and the mounting plate and reducing the time for installing the transformer on the mounting plate.

[0004] Although the current transformer in this invention can reduce the time for installing the transformer on the mounting plate, when installing this open-type electromagnetic transformer, the two parts of the transformer need to be disassembled and then sleeved to surround the measured copper bar. For the docking of the transformer body and the base, it is generally docked through connecting parts such as screws and bolts. When disassembling and docking, a screwdriver is required to disassemble the connecting parts such as screws and bolts to separate the open-type transformer. The disassembly and installation methods are not fast enough, affecting the maintenance and detection efficiency of the power system. Moreover, during the normal operation of the voltage transformer, electromagnetic vibration noise may be generated due to electromagnetic conversion, especially when the voltage increases and the current increases, the vibration is more significant. Long-term electromagnetic vibration may cause the fixing points to fall off, and at this time, abnormal noise will be generated due to the vibration, which will affect the detection efficiency of the power system. Summary of the Invention

[0005] Embodiments of the present disclosure relate to an electromagnetic voltage transformer, aiming to solve the problems that during the installation of an open-type electromagnetic transformer, the disassembly and installation methods are not fast enough, affecting the maintenance and detection efficiency of the power system, and during the normal operation of the voltage transformer, abnormal noises may be generated due to electromagnetic vibration sounds generated by electromagnetic conversion, affecting the detection efficiency of the power system.

[0006] To achieve the above object, the present invention provides the following technical solution: An electromagnetic voltage transformer includes a transformer main body, a docking base is provided below the transformer main body, two docking insertion frames are fixedly connected below the transformer main body, inner positioning flanges are arranged inside both of the two docking insertion frames, docking sockets with the same number and corresponding positions as the docking insertion frames are opened at the upper end of the docking base, and unlocking components are arranged inside both of the two docking sockets;

[0007] The unlocking component includes an unlocking top post slidably connected to the docking base, one end of the unlocking top post is located inside the docking socket and fixedly connected with a limiting hook plate, and the other end of the unlocking top post is located outside the docking base.

[0008] Preferably, the limiting hook plate is slidably connected inside the docking socket, a first elastic member is sleeved on the unlocking top post, one end of the first elastic member is connected to the limiting hook plate, the other end of the first elastic member is connected to the inner wall of the docking socket, and a hook plate wedge surface is opened at the upper edge of the limiting hook plate.

[0009] Preferably, two groups of symmetrically arranged guiding components are provided on both sides of the transformer main body along the length of the copper bar, and a clamping component for clamping the transformer on the copper bar is provided on each guiding component.

[0010] Preferably, the clamping component includes two pistons, two sliding grooves are opened at one end of the sliding plate close to the copper bar, the two pistons are respectively slidably connected in the corresponding sliding grooves, fixing columns are slidably connected on the side of each piston close to the copper bar inside the two sliding grooves, a second elastic member is connected between each piston and the corresponding fixing column, and thermal expansion gas is provided between the inside of each sliding groove and the side of the corresponding piston away from the copper bar.

[0011] Preferably, one end of the fixing column away from the piston is fixedly connected with a copper bar pressing plate, two gasket sockets are provided on the side of the copper bar pressing plate close to the copper bar, and elastic gaskets are installed inside each gasket socket.

[0012] Preferably, the guiding assembly includes a guiding frame, both ends of the guiding frame are fixedly connected to one side of the main body of the mutual inductor, a first socket is formed inside the guiding frame, and second sockets are formed at both ends of the guiding frame.

[0013] Preferably, a sliding plate is slidably connected between the main body of the mutual inductor and the guiding frame. A plurality of top plate wedge teeth are formed on a side of the sliding plate away from the main body of the mutual inductor. A directional locking plate is slidably connected inside the first socket. A plurality of locking plate wedge teeth are formed at one end of the directional locking plate close to the sliding plate. The top plate wedge teeth and the locking plate wedge teeth can mesh with each other.

[0014] Preferably, locking plate wedge grooves are formed on both sides of the directional locking plate close to the guiding frame. An installation groove is formed inside each locking plate wedge groove. A third elastic member is arranged in each installation groove. One end of each third elastic member is respectively connected to the corresponding installation groove, and the other end of each third elastic member is connected to the guiding frame.

[0015] Preferably, a trigger pressing plate is slidably connected inside the second socket. A limiting groove is formed on a side surface of the trigger pressing plate. A sliding wedge groove is formed at one end of the trigger pressing plate close to the directional locking plate. The sliding wedge groove and the locking plate wedge groove are slidably matched with each other.

[0016] A method for using an electromagnetic voltage transformer includes the following steps:

[0017] S1. Separate the main body of the mutual inductor from the docking base by pressing the unlocking assembly;

[0018] S2. Sleeve the main body of the mutual inductor on the copper bar;

[0019] S3. Fix the mutual inductor on the copper bar through the guiding assembly and the clamping assembly;

[0020] S4. Fix the docking base under the main body of the mutual inductor through the unlocking assembly.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention sets an unlocking component. When the transformer body is docked with the docking base, the docking frame is plugged into the docking socket, and the limit hook plate is docked with the inner positioning folded edge, so that the transformer body and the docking base cannot be separated. When the transformer body and the docking base are separated, the unlocking top column can be pressed to make the unlocking top column push the limit hook plate to move inward, so that the limit hook plate is separated from the inner positioning folded edge, and the transformer body can be separated from the top of the docking base, so as to realize the quick separation of the transformer body and the docking base without additional tools. This solves the problem that when disassembling and docking the traditional voltage transformer, it is necessary to use a screwdriver to remove the screws, bolts and other connecting parts before separating the open transformer, and the disassembly and installation methods are not fast enough, which affects the maintenance and detection efficiency of the power system;

[0023] 2. The present invention provides a guide component and a clamping component. When the voltage transformer is adjusted to be fixedly connected to the copper bar, the sliding plate is pushed by an external force. Due to the wedge-shaped tooth structure of the top plate wedge teeth and the lock plate wedge teeth, the sliding plate can be pushed toward the center direction of the transformer body, so that the elastic gasket is tightly fitted with the outer surface of the copper bar. At the same time, due to the wedge-shaped tooth structure of the top plate wedge teeth and the lock plate wedge teeth, the sliding plate cannot move away from the center of the transformer body, thereby realizing a one-way locking function. When separation is required, the two trigger pressure plates can be pinched to move the trigger pressure plates toward the center direction of the directional lock plate, so that the lock plate wedge teeth are separated from the top plate wedge teeth, and the lock of the sliding plate is released. The sliding plate can be moved left and right to adjust the clamping of the copper bar, thereby improving the fastness of fixing and disassembling the copper bar, and the voltage transformer can be installed without tools, thereby improving the convenience of installation of the voltage transformer and the detection and maintenance efficiency of the power system.

[0024] 3. The present invention provides a clamping assembly. When the guide assembly is pushed to clamp the copper bar, the reaction force can squeeze the second elastic member through the fixed column on the copper bar pressure plate, so that the piston moves in the sliding groove and squeezes the gas inside the sliding groove. When the voltage transformer vibrates, the elastic force of the second elastic member can offset the vibration frequency to prevent the clamping assembly from loosening. When the voltage and current of the copper bar increase during use, the voltage transformer will generate heat as the voltage and current of the copper bar increase. When the gas in the sliding groove is heated, it will expand and synchronously squeeze the piston to move toward the copper bar and squeeze the second elastic member. The elastic force of the second elastic member can be adjusted to further improve the vibration reduction effect, thereby avoiding abnormal noise caused by vibration and improving the detection efficiency of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the separation state of the present invention;

[0027] Figure 3 It is a schematic upward view of the separated state of the present invention;

[0028] Figure 4 It is a schematic internal structure view of the docking socket of the present invention;

[0029] Figure 5 of the present invention Figure 4 It is a schematic enlarged partial structure view at position A in the present invention;

[0030] Figure 6 It is a schematic structure view of the guiding component and the clamping component of the present invention;

[0031] Figure 7 It is an exploded structure view of the guiding component and the clamping component of the present invention;

[0032] Figure 8 It is a schematic view of another perspective of the exploded structure of the guiding component and the clamping component of the present invention;

[0033] Figure 9 It is a cross-sectional view of the sliding plate of the present invention.

[0034] Reference numerals are: 1, main body of the mutual inductor; 11, docking base; 12, docking plug frame; 13, inner positioning flange; 14, docking socket; 2, unlocking component; 21, unlocking ejector pin; 22, limiting hook plate; 23, first elastic member; 24, wedge surface of the hook plate; 3, guiding component; 31, guiding frame; 32, first socket; 33, second socket; 34, sliding plate; 35, wedge teeth on the top plate; 36, directional locking plate; 37, wedge teeth on the locking plate; 38, wedge slot on the locking plate; 39, installation groove; 310, third elastic member; 311, triggering pressure plate; 312, sliding wedge slot; 4, clamping component; 41, sliding groove; 42, piston; 43, second elastic member; 44, fixed column; 45, copper bar pressing plate; 46, gasket socket; 47, elastic gasket. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1

[0037] Current transformers can reduce the time for installing the transformers on the mounting plate. However, when installing this type of split-core electromagnetic transformer, the two parts of the transformer need to be disassembled and then sleeved to surround the copper busbar to be measured. Generally, the connection between the transformer body and the base is achieved through connectors such as screws and bolts. When disassembling and connecting, a screwdriver is required to disassemble the connectors such as screws and bolts to separate the split-core transformer. The disassembly and installation methods are not fast enough, which affects the maintenance and detection efficiency of the power system. To solve the above problems, this embodiment is specifically invented.

[0038] As Figures 1 to 9 shown in the figure, the present invention provides an electromagnetic voltage transformer, which includes a transformer body 1. A docking base 11 is provided below the transformer body 1. Two docking insertion frames 12 are fixedly connected below the transformer body 1. Inner positioning flanges 13 are arranged inside both of the two docking insertion frames 12. Docking sockets 14 with the same number and corresponding positions as the docking insertion frames 12 are opened at the upper end of the docking base 11. Unlocking assemblies 2 are arranged inside both of the two docking sockets 14;

[0039] As Figures 1 to 5 shown in the figure, the unlocking assembly 2 includes an unlocking push rod 21 slidably connected to the docking base 11. One end of the unlocking push rod 21 is located inside the docking socket 14 and is fixedly connected with a limiting hook plate 22. The other end of the unlocking push rod 21 is located outside the docking base 11.

[0040] As Figures 1 to 5 shown in the figure, the limiting hook plate 22 is slidably connected inside the docking socket 14. A first elastic member 23 is sleeved on the unlocking push rod 21. One end of the first elastic member 23 is connected to the limiting hook plate 22, and the other end of the first elastic member 23 is connected to the inner wall of the docking socket 14. A hook plate inclined surface 24 is opened on the upper edge of the limiting hook plate 22.

[0041] During actual use, when the transformer body 1 and the docking base 11 are in a docked state, the docking insertion frame 12 is inserted inside the docking socket 14, and the limiting hook plate 22 is located inside the docking insertion frame 12. The hook-shaped structure of the limiting hook plate 22 is docked with the inner positioning flange 13, so that the transformer body 1 and the docking base 11 cannot be separated.

[0042] When it is necessary to separate the transformer body 1 from the docking base 11, the unlocking push rod 21 can be pressed to make the unlocking push rod 21 push the limiting hook plate 22 to move inward, so that the top hook-shaped flange of the limiting hook plate 22 is separated from the inner positioning flange 13, and then the transformer body 1 can be separated from above the docking base 11, realizing the quick separation of the transformer body 1 and the docking base 11.

[0043] When the main body 1 of the mutual inductor is docked with the docking base 11 again, hold the main body 1 of the mutual inductor and control the docking insertion frame 12 to vertically insert into the docking socket 14, so that the inner positioning flange 13 is closely attached to the hook wedge surface 24 at the top of the limit hook plate 22, and under the extrusion effect, the limit hook plate 22 is pushed towards the center direction of the docking socket 14 to move the limit hook plate 22 outwards. When the inner positioning flange 13 is docked with the limit hook plate 22 again, the limit hook plate 22 is hooked with the inner positioning flange 13 again under the pulling force of the first elastic member 23, realizing the quick docking of the main body 1 of the mutual inductor and the docking base 11.

[0044] In summary, through the setting of the unlocking assembly 2, when the main body 1 of the mutual inductor is docked with the docking base 11, the docking insertion frame 12 is inserted into the docking socket 14, and the limit hook plate 22 is docked with the inner positioning flange 13, so that the main body 1 of the mutual inductor and the docking base 11 cannot be separated. When the main body 1 of the mutual inductor is separated from the docking base 11, the unlocking top column 21 can be pressed, so that the unlocking top column 21 pushes the limit hook plate 22 to move inwards, so that the limit hook plate 22 is separated from the inner positioning flange 13, and the main body 1 of the mutual inductor can be separated from the upper part of the docking base 11, realizing the quick separation of the main body 1 of the mutual inductor and the docking base 11, without additional tools, solving the problem that when disassembling and docking traditional voltage transformers, it is necessary to use a screwdriver to disassemble connecting parts such as screws and bolts to separate the split-type transformer, and the disassembly and installation methods are not fast enough, affecting the maintenance and detection efficiency of the power system.

[0045] Embodiment 2

[0046] When used on the basis of the above embodiment, it is found that the fixing method of the voltage transformer to the copper bar is to fix it tightly with a stud. During operation, an additional tool is required to rotate and adjust the stud, resulting in the problem that the fixing operation of the transformer and the copper bar is not convenient enough. To solve the above problem, this embodiment is specifically invented.

[0047] As Figures 1 to 9 shown, two groups of symmetrically arranged guiding components 3 are provided on both sides of the main body 1 of the mutual inductor along the length of the copper bar, and a clamping component 4 for clamping the mutual inductor on the copper bar is provided on each guiding component 3.

[0048] As Figures 6 to 9 shown, the clamping component 4 includes two pistons 42. Two sliding grooves 41 are opened at one end of the sliding plate 34 close to the copper bar. The two pistons 42 are respectively slidably connected in the corresponding sliding grooves 41. Fixed columns 44 are slidably connected inside the two sliding grooves 41 on the side of the corresponding pistons 42 close to the copper bar. A second elastic member 43 is connected between each piston 42 and the corresponding fixed column 44, and a thermal expansion gas is provided between the inside of each sliding groove 41 and the side of the corresponding piston 42 away from the copper bar.

[0049] As Figures 6 to 9As shown, one end of the fixed column 44 away from the piston 42 is fixedly connected with a copper bar pressing plate 45. There are two gasket sockets 46 on the side of the copper bar pressing plate 45 close to the copper bar, and an elastic gasket 47 is installed inside each gasket socket 46.

[0050] As Figures 1 to 8 shown, the guiding assembly 3 includes a guiding frame 31. Both ends of the guiding frame 31 are fixedly connected to one side of the mutual inductor main body 1. A first socket 32 is opened inside the guiding frame 31, and second sockets 33 are opened at both ends of the guiding frame 31.

[0051] As Figures 6 to 8 shown, a sliding plate 34 is slidably connected between the mutual inductor main body 1 and the guiding frame 31. A plurality of top plate wedge teeth 35 are opened on the side of the sliding plate 34 away from the mutual inductor main body 1. A directional locking plate 36 is slidably connected inside the first socket 32. A plurality of locking plate wedge teeth 37 are opened at one end of the directional locking plate 36 close to the sliding plate 34, and the top plate wedge teeth 35 and the locking plate wedge teeth 37 can mesh with each other.

[0052] As Figures 1 to 8 shown, locking plate wedge grooves 38 are opened on both sides of the two ends of the directional locking plate 36 close to the guiding frame 31. An installation groove 39 is opened inside each locking plate wedge groove 38, and a third elastic member 310 is arranged in each installation groove 39. One end of each third elastic member 310 is respectively connected to the corresponding installation groove 39, and the other end of each third elastic member 310 is connected to the guiding frame 31.

[0053] As Figures 1 to 9 shown, a trigger pressing plate 311 is slidably connected inside the second socket 33. A limiting groove is opened on the side surface of the trigger pressing plate 311, and a sliding wedge groove 312 is opened at one end of the trigger pressing plate 311 close to the directional locking plate 36. The sliding wedge groove 312 and the locking plate wedge groove 38 are slidably matched with each other.

[0054] During actual use, when installing the voltage mutual inductor onto the copper bar, by pushing the sliding plate 34 to drive the copper bar pressing plate 45 to move towards the copper bar, the elastic gasket 47 is brought into contact with the copper bar to clamp the copper bar. Due to the wedge tooth structure of the top plate wedge teeth 35 and the locking plate wedge teeth 37, the sliding plate 34 can move towards the copper bar, and the sliding plate 34 cannot move in the direction away from the center of the mutual inductor main body 1, thus realizing the one-way locking function.

[0055] When it is necessary to separate the clamping assembly 4 from the copper bar, the two trigger pressing plates 311 can be pinched to make the trigger pressing plates 311 move towards the center of the directional locking plate 36. Through the pushing of the inclined surfaces of the sliding wedge groove 312 and the locking plate wedge groove 38, the directional locking plate 36 is pushed outwards, so that the locking plate wedge teeth 37 are separated from the top plate wedge teeth 35, and the locking of the sliding plate 34 is released, and the sliding plate 34 can be moved left and right to adjust the clamping of the copper bar.

[0056] In summary, through the settings of the guiding component 3 and the clamping component 4, when adjusting the fixed connection between the voltage transformer and the copper bar, when the sliding plate 34 is pushed by an external force, due to the wedge-shaped tooth structures of the top plate wedge teeth 35 and the locking plate wedge teeth 37, the sliding plate 34 can be pushed towards the center direction of the transformer body 1, so that the elastic gasket 47 is closely attached to the outer surface of the copper bar. At the same time, due to the wedge-shaped tooth structures of the top plate wedge teeth 35 and the locking plate wedge teeth 37, the sliding plate 34 cannot move in the direction away from the center of the transformer body 1, thus realizing the one-way locking function. When separation is required, the two trigger pressing plates 311 can be pinched, so that the trigger pressing plates 311 move towards the center direction of the directional locking plate 36, separating the locking plate wedge teeth 37 from the top plate wedge teeth 35, releasing the locking of the sliding plate 34, and enabling the sliding plate 34 to move left and right to adjust the clamping of the copper bar, improving the quickness of fixing and disassembling the copper bar. The voltage transformer can be installed without tools, improving the installation convenience of the voltage transformer and the detection and maintenance efficiency of the power system.

[0057] Embodiment 3

[0058] When used on the basis of the above embodiment, it is found that during the normal operation of the voltage transformer, electromagnetic vibration noise may be generated due to electromagnetic conversion, especially when the voltage increases and the current increases, the vibration is more significant. Long-term electromagnetic vibration may cause the fixing points to fall off. At this time, abnormal noise will be generated due to the vibration, which will affect the detection efficiency of the power system. Therefore, this embodiment improves the device described in the above embodiment.

[0059] As Figures 5 to 9 shown, the clamping component 4 includes two pistons 42. Two sliding grooves 41 are opened at one end of the sliding plate 34 close to the copper bar. The two pistons 42 are respectively slidably connected in the corresponding sliding grooves 41. Fixed columns 44 are slidably connected to the inner parts of the two sliding grooves 41 on the sides of the corresponding pistons 42 close to the copper bar. A second elastic member 43 is connected between each piston 42 and the corresponding fixed column 44. Thermal expansion gas is provided between the inner part of each sliding groove 41 and the side of the corresponding piston 42 away from the copper bar.

[0060] As Figures 5 to 9 shown, one end of the fixed column 44 away from the piston 42 is fixedly connected to a copper bar pressing plate 45. Two gasket sockets 46 are provided on the side of the copper bar pressing plate 45 close to the copper bar. An elastic gasket 47 is installed inside each gasket socket 46.

[0061] In actual use, when pushing the guiding component 3 to clamp the copper bar by the clamping component 4, the reaction force can squeeze the second elastic member 43 through the fixing column 44 on the copper bar pressing plate 45, causing the piston 42 to move within the sliding groove 41 and squeezing the gas inside the sliding groove 41. When the voltage transformer vibrates, the vibration frequency can be offset by the elastic force of the second elastic member 43 to prevent the loosening of the clamping component 4. When the voltage and current of the copper bar increase during use, the voltage transformer will generate heat following the increase in voltage and current of the copper bar. When the gas in the sliding groove 41 is heated, it will expand, simultaneously squeezing the piston 42 to move towards the copper bar direction and squeezing the second elastic member 43 to adjust the elastic force of the second elastic member 43, further improving the vibration damping effect, thereby avoiding abnormal noises caused by vibration and improving the detection efficiency of the power system.

[0062] In summary, through the setting of the clamping component 4, when pushing the guiding component 3 to clamp the copper bar by the clamping component 4, the reaction force can squeeze the second elastic member 43 through the fixing column 44 on the copper bar pressing plate 45, causing the piston 42 to move within the sliding groove 41 and squeezing the gas inside the sliding groove 41. When the voltage transformer vibrates, the vibration frequency can be offset by the elastic force of the second elastic member 43 to prevent the loosening of the clamping component 4. When the voltage and current of the copper bar increase during use, the voltage transformer will generate heat following the increase in voltage and current of the copper bar. When the gas in the sliding groove 41 is heated, it will expand, simultaneously squeezing the piston 42 to move towards the copper bar direction and squeezing the second elastic member 43 to adjust the elastic force of the second elastic member 43, further improving the vibration damping effect, thereby avoiding abnormal noises caused by vibration and improving the detection efficiency of the power system.

[0063] Embodiment 4

[0064] A method for using an electromagnetic voltage transformer includes the following steps:

[0065] S1. Separate the transformer main body 1 from the docking base 11 by pressing the unlocking component 2;

[0066] S2. Sleeve the transformer main body 1 on the copper bar;

[0067] S3. Fix the transformer on the copper bar through the guiding component 3 and the clamping component 4;

[0068] S4. Fix the docking base 11 under the transformer main body 1 through the unlocking component 2.

[0069] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An electromagnetic voltage transformer, comprising a transformer main body, and a docking base is provided below the transformer main body, characterized in that: There are two docking plug frames fixedly connected below the main body of the mutual inductor. Inner positioning flanges are arranged inside both of the two docking plug frames. Docking sockets with the same number and corresponding positions as the docking plug frames are opened at the upper end of the docking base. Unlocking components are arranged inside both of the two docking sockets; The unlocking component includes an unlocking ejector pin slidably connected to the docking base. One end of the unlocking ejector pin is located inside the docking socket and is fixedly connected with a limit hook plate. The other end of the unlocking ejector pin is located outside the docking base.

2. The electromagnetic voltage transformer according to claim 1, wherein: The limit hook plate is slidably connected inside the docking socket. A first elastic member is sleeved on the unlocking ejector pin. One end of the first elastic member is connected to the limit hook plate, and the other end of the first elastic member is connected to the inner wall of the docking socket. A hook plate wedge surface is opened on the upper edge of the limit hook plate.

3. The electromagnetic voltage transformer according to claim 2, wherein: On both sides of the main body of the mutual inductor along the length of the copper bar, there are two groups of symmetrically arranged guiding components. A clamping component for clamping the mutual inductor on the copper bar is arranged on each guiding component.

4. The electromagnetic voltage transformer according to claim 3, wherein: The clamping component includes two pistons. Two sliding grooves are opened at one end of the sliding plate close to the copper bar. The two pistons are respectively slidably connected in the corresponding sliding grooves. Fixed columns are slidably connected to the sides of the two sliding grooves corresponding to the pistons close to the copper bar. A second elastic member is connected between each piston and the corresponding fixed column. Thermal expansion gas is arranged between each sliding groove and the side of the corresponding piston away from the copper bar.

5. The electromagnetic voltage transformer according to claim 4, characterized in that: One end of the fixed column away from the piston is fixedly connected with a copper bar pressing plate. Two gasket sockets are arranged on the side of the copper bar pressing plate close to the copper bar. Elastic gaskets are installed inside each gasket socket.

6. The electromagnetic voltage transformer according to claim 5, characterized in that: The guiding component includes a guiding frame. Both ends of the guiding frame are fixedly connected to one side of the main body of the mutual inductor. A first socket is opened inside the guiding frame. Second sockets are opened at both ends of the guiding frame.

7. The electromagnetic voltage transformer according to claim 6, wherein: A sliding plate is slidably connected between the main body of the mutual inductor and the guiding frame. A plurality of top plate wedge teeth are opened on the side of the sliding plate away from the main body of the mutual inductor. A directional locking plate is slidably connected inside the first socket. A plurality of locking plate wedge teeth are opened at one end of the directional locking plate close to the sliding plate. The top plate wedge teeth and the locking plate wedge teeth can be meshed with each other.

8. The electromagnetic voltage transformer according to claim 7, characterized in that: Locking plate wedge grooves are opened on both sides of the two ends of the directional locking plate close to the guiding frame. An installation groove is opened inside each locking plate wedge groove. A third elastic member is arranged inside each installation groove. One end of each third elastic member is respectively connected to the corresponding installation groove, and the other end of each third elastic member is connected to the guiding frame.

9. The electromagnetic voltage transformer according to claim 8, characterized in that: A trigger pressing plate is slidably connected inside the second socket. A limit groove is opened on the side surface of the trigger pressing plate. A sliding wedge groove is opened at one end of the trigger pressing plate close to the directional locking plate. The sliding wedge groove and the locking plate wedge groove are slidably matched with each other.

10. A method for using an electromagnetic voltage transformer, which uses the electromagnetic voltage transformer according to any one of claims 1-9, characterized in that: Including the following steps: S1. Separate the main body of the mutual inductor from the docking base by pressing the unlocking component; S2. Sleeve the main body of the mutual inductor on the copper bar; S3. Fix the mutual inductor on the copper bar through the guiding component and the clamping component; S4. Fix the docking base under the main body of the mutual inductor through the unlocking component.

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