Middle-high voltage digital mutual inductor

Abstract

The invention discloses a middle-high voltage digital mutual inductor, which relates to the field of power systems, and comprises a base, a mutual inductance mechanism, a butt joint conductive mechanism, an insulating protective shell, an elastic limiting mechanism, a voltage detection part and an insulating porcelain bushing, the insulating porcelain bushing is arranged at the upper part of the insulating protective shell and is communicated with the insulating protective shell, and the voltage detection part is arranged outside the insulating protective shell and is communicated with the elastic limiting mechanism. The lower part of the insulating protective shell is of an open structure, and the elastic limiting mechanism is arranged in the insulating protective shell; the butt joint conductive mechanism is arranged on the base, the mutual inductance mechanism comprises an iron core, a first winding and a second winding, the iron core is arranged on the upper portion of the base, the first winding is electrically connected with the voltage detection component, the second winding is electrically connected with the butt joint conductive mechanism, the lower portion of the insulating protective shell is in sealed connection with the upper portion of the base, and the elastic limiting mechanism is located in the iron core. And the supporting device is used for limiting and supporting the iron core. According to the middle-high voltage digital mutual inductor, internal parts can be conveniently overhauled and replaced, and internal wire harnesses can be conveniently adjusted.

Description

Technical Field

[0001] The invention relates to the field of power systems, and in particular to a medium- and high-voltage digital mutual inductor. Background Art

[0002] Existing medium and high voltage digital transformers are fixed by casting insulating resin to protect the internal components. However, the internal components fixed by casting insulating resin cannot be moved, which makes it difficult to repair and replace them after damage, and it is impossible to adjust the internal wiring harness. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a medium- and high-voltage digital transformer, which is convenient for inspection and replacement of internal components and adjustment of internal wiring harnesses.

[0004] To achieve the above object, the present invention provides the following solutions: The present invention provides a medium- and high-voltage digital mutual inductor, comprising a base, a mutual inductance mechanism, a docking conductive mechanism, an insulating shell, an elastic limiting mechanism, a voltage detection component and an insulating porcelain sleeve, wherein the insulating porcelain sleeve is arranged at the upper part of the insulating shell and is communicated with the insulating shell, the voltage detection component is arranged outside the insulating shell, the lower part of the insulating shell is an open structure, and the elastic limiting mechanism is arranged in the insulating shell; the docking conductive mechanism is arranged on the base, the mutual inductance mechanism comprises an iron core, a first winding and a second winding, the iron core is arranged at the upper part of the base, the first winding and the second winding are respectively wound on both sides of the iron core, the first winding is electrically connected to the voltage detection component, the second winding is electrically connected to the docking conductive mechanism, the lower part of the insulating shell is sealed and connected to the upper part of the base, and the elastic limiting mechanism is located inside the iron core and is used for limiting and supporting the iron core.

[0005] Preferably, the elastic limiting mechanism includes a guide rod, a first spring, two limit blocks and two connecting frames, the upper parts of the two connecting frames are fixed in the insulating protective shell, the two ends of the guide rod are respectively fixed to the lower parts of the two connecting frames, the first spring and the two limit blocks are both mounted on the guide rod, and the two limit blocks are respectively located on both sides of the first spring, and the two limit blocks are respectively used to abut against the left and right sides of the inside of the iron core.

[0006] Preferably, the connecting frame comprises a horizontal plate and a vertical plate arranged below the horizontal plate, the horizontal plate is fixed in the insulating protective shell, and the two ends of the guide rod are respectively fixed on the two vertical plates.

[0007] Preferably, the elastic limiting mechanism further comprises two elastic supporting assemblies, each of which is arranged at one end of the limiting block away from the guide rod, and the elastic supporting assembly is used to abut against the front and rear sides of the inside of the iron core.

[0008] Preferably, the elastic support assembly includes two support blocks, two second springs and two hinged seats, the two support blocks are respectively hinged to the front and rear sides of the limit block away from one end of the guide rod through the two hinged seats, and a second spring is installed between each support block and the limit block. The two support blocks are respectively used to abut against the front and rear sides of the inside of the iron core.

[0009] Preferably, it also includes a protective seat and a docking seat, the docking seat is arranged on the upper part of the insulating protective shell, the protective seat is arranged on the upper part of the docking seat, the insulating porcelain sleeve is arranged on the upper part of the protective seat, and the insulating porcelain sleeve, the protective seat, the docking seat and the insulating protective shell are connected in sequence.

[0010] Preferably, two insulating porcelain sleeves are provided, and the two insulating porcelain sleeves are respectively arranged on both sides of the upper part of the protection seat.

[0011] Preferably, it further comprises a signal transmitter, and the signal transmitter is electrically connected to the voltage detection component.

[0012] Preferably, the base includes a bottom plate, an insulating protection seat and a lower docking frame, the insulating protection seat is fixed to the upper part of the bottom plate, the lower docking frame is fixed to the upper part of the insulating protection seat, and the docking conductive mechanism is arranged on the insulating protection seat; an upper docking frame is arranged at the lower part of the insulating protective shell, and the upper docking frame is sealed and connected to the lower docking frame.

[0013] Preferably, the docking conductive mechanism includes two connecting seats, two docking conductive shafts and two fastening threaded sleeves, the two connecting seats are both arranged on the insulating protection seat, the two ends of the second winding are electrically connected to the two connecting seats respectively, the insulating protection seat is a hollow structure, two threaded holes are arranged on one side of the insulating protection seat, external threads are arranged on the outer wall of the docking conductive shaft, each of the docking conductive shafts is installed in one of the threaded holes and extends to the interior of the insulating protection seat, each of the docking conductive shafts is electrically connected to one of the connecting seats, and a fastening threaded sleeve is installed at one end of each of the docking conductive shafts located outside the insulating protection seat, and the two fastening threaded sleeves are used to connect to external lines.

[0014] Compared with the prior art, the present invention has achieved the following technical effects: The mutual inductance mechanism of the medium and high voltage digital mutual inductor of the present invention comprises an iron core, a first winding and a second winding, the iron core is arranged on the upper part of the base, the first winding and the second winding are respectively wound on both sides of the iron core, the first winding is electrically connected to the voltage detection component, the second winding is electrically connected to the docking conductive mechanism, the lower part of the insulating shell is sealed and connected to the upper part of the base, insulating oil is injected into the insulating shell and the insulating porcelain sleeve, and the elastic limiting mechanism is located inside the iron core and supports the iron core. Compared with the method of casting and fixing with insulating resin, the elastic limiting mechanism in this embodiment can adjust the internal wiring harness after supporting and limiting the iron core. When maintenance is required, after disassembling the high voltage digital mutual inductor, the elastic limiting mechanism can be removed from the iron core, thereby facilitating the maintenance and replacement of internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A first three-dimensional structural diagram of a medium- and high-voltage digital transformer provided by the present invention; Figure 2 A second three-dimensional structural diagram of the medium- and high-voltage digital transformer provided by the present invention; Figure 3 This is an exploded diagram of the medium and high voltage digital transformer provided by the present invention.

[0017] Explanation of the reference numerals: 100, medium and high voltage digital transformer; 1, insulating shell; 2, docking seat; 3, protection seat; 4, insulating porcelain sleeve; 5, voltage detection component; 6, signal transmitter; 7, upper docking frame; 8, connecting frame; 9, guide rod; 10, first spring; 11, limit block; 12, hinged seat; 13, support block; 14, second spring; 15, bottom plate; 16, insulating protection seat; 17, lower docking frame; 18, iron core; 19, first winding; 20, second winding; 21, connecting seat; 22, docking conductive shaft; 23, fastening threaded sleeve. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The object of the present invention is to provide a medium- and high-voltage digital transformer, which is convenient for inspecting and replacing internal components and adjusting internal wiring harnesses.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-Figure 3 As shown, this embodiment provides a medium- and high-voltage digital transformer 100, including a base, a mutual inductance mechanism, a docking conductive mechanism, an insulating shell 1, an elastic limiting mechanism, a voltage detection component 5 and an insulating porcelain sleeve 4, wherein the insulating porcelain sleeve 4 is arranged at the upper part of the insulating shell 1 and is connected to the insulating shell 1, the voltage detection component 5 is arranged outside the insulating shell 1, the lower part of the insulating shell 1 is an open structure, and the elastic limiting mechanism is arranged in the insulating shell 1; the docking conductive mechanism is arranged on the base, and the mutual inductance mechanism includes An iron core 18, a first winding 19 and a second winding 20, the iron core 18 is arranged on the upper part of the base, the first winding 19 and the second winding 20 are respectively wound on both sides of the iron core 18, the first winding 19 is electrically connected to the voltage detection component 5, the second winding 20 is electrically connected to the docking conductive mechanism, the lower part of the insulating shell 1 is sealed and connected to the upper part of the base, the insulating shell 1 and the insulating porcelain sleeve 4 can be injected with insulating oil, the elastic limiting mechanism is located inside the iron core 18, and is used to limit and support the iron core 18.

[0022] Compared with the method of casting and fixing with insulating resin, the elastic limiting mechanism in this embodiment limits the support of the iron core 18, so that the position of the iron core 18 is fixed but does not affect the adjustment of the internal wiring harness, that is, the internal wiring harness can be adjusted. When maintenance is required, after disassembling the high-voltage digital transformer, the elastic limiting mechanism can be removed from the iron core 18, thereby facilitating the maintenance and replacement of internal components such as the iron core 18, the first winding 19, and the second winding 20.

[0023] The elastic limiting mechanism includes a guide rod 9, a first spring 10, two limiting blocks 11 and two connecting frames 8. The upper parts of the two connecting frames 8 are fixed in the insulating housing 1, and the two ends of the guide rod 9 are respectively fixed to the lower parts of the two connecting frames 8. The two connecting frames 8 are used to support the guide rod 9. The first spring 10 and the two limiting blocks 11 are both sleeved on the guide rod 9, and the two limiting blocks 11 are respectively located on both sides of the first spring 10, and the two limiting blocks 11 are respectively used to abut against the left and right sides of the inside of the iron core 18.

[0024] The connecting frame 8 in this embodiment includes a horizontal plate and a vertical plate arranged below the horizontal plate. The horizontal plate is fixed in the insulating protective shell 1, and both ends of the guide rod 9 are respectively fixed to the two vertical plates.

[0025] The elastic limiting mechanism further includes two elastic supporting components, each of which is arranged at one end of a limiting block 11 away from the guide rod 9 , and the elastic supporting components are used to abut against the front and rear sides of the inside of the iron core 18 .

[0026] The elastic support assembly includes two support blocks 13, two second springs 14 and two hinged seats 12. The two support blocks 13 are respectively hinged to the front and rear sides of the limit block 11 away from the end of the guide rod 9 through the two hinged seats 12. A second spring 14 is installed between each support block 13 and the limit block 11. The two support blocks 13 are respectively used to abut against the front and rear sides of the inside of the iron core 18.

[0027] The limit block 11 in this embodiment includes a vertical block and a horizontal block arranged on the outer side of the lower part of the vertical block. The vertical block is slidably mounted on the guide rod 9. The two vertical blocks are respectively located on both sides of the first spring 10. The two horizontal blocks are respectively used to abut the left and right sides of the inside of the iron core 18. Each elastic support assembly is arranged at one end of a horizontal block away from the vertical block. The two support blocks 13 of each elastic support assembly are respectively hinged to the front and rear sides of the end of the horizontal block away from the vertical block through two hinge seats 12. A second spring 14 is installed between each support block 13 and the horizontal block.

[0028] When the elastic limiting mechanism is docked with the iron core 18, the two limiting blocks 11 are pushed inward to squeeze the first spring 10, and each supporting block 13 is pushed toward the side close to the limiting block 11 to squeeze the second spring 14. Then the elastic limiting mechanism is placed inside the iron core 18, and the two limiting blocks 11 and each supporting block 13 are released. Under the action of the first spring 10, the two limiting blocks 11 are respectively abutted against the left and right sides of the inside of the iron core 18; under the action of the second spring 14, each supporting block 13 rotates toward the side away from the limiting block 11, and the two supporting blocks 13 in each elastic supporting assembly are respectively abutted against the front and back sides of the inside of the iron core 18, thereby realizing the limiting support of the iron core 18 and improving the connection stability performance of the iron core 18.

[0029] The elastic limiting mechanism in this embodiment enables the preliminary installation work to be carried out conveniently and quickly, and also facilitates the subsequent maintenance and replacement work.

[0030] The present embodiment further includes a protection seat 3 and a docking seat 2, the docking seat 2 is arranged on the upper part of the insulating protective shell 1, the protection seat 3 is arranged on the upper part of the docking seat 2, the insulating porcelain sleeve 4 is arranged on the upper part of the protection seat 3, and the insulating porcelain sleeve 4, the protection seat 3, the docking seat 2 and the insulating protective shell 1 are sequentially connected. The insulating porcelain sleeve 4, the protection seat 3, the docking seat 2 and the insulating protective shell 1 can be filled with insulating oil to achieve the purpose of insulation protection.

[0031] In this specific embodiment, two insulating porcelain sleeves 4 are provided, and the two insulating porcelain sleeves 4 are respectively arranged on both sides of the upper part of the protection seat 3 .

[0032] This embodiment also includes a signal transmitter 6, which is electrically connected to the voltage detection component 5. The voltage detection component 5 can detect the voltage condition and transmit it through the signal transmitter 6 at the same time.

[0033] Specifically, the voltage detection component 5 is disposed on the front side of the insulating housing 1 , and the signal transmitter 6 is disposed on the front side of the voltage detection component 5 .

[0034] The base includes a bottom plate 15, an insulating protection seat 16 and a lower docking frame 17. The insulating protection seat 16 is fixed to the upper part of the bottom plate 15, the lower docking frame 17 is fixed to the upper part of the insulating protection seat 16, and the docking conductive mechanism is arranged on the insulating protection seat 16; an upper docking frame 7 is arranged at the lower part of the insulating shell 1, and the upper docking frame 7 is sealed and connected to the lower docking frame 17.

[0035] Specifically, the upper docking frame 7 and the lower docking frame 17 are both rectangular frames with the same structure. The lower part of the upper docking frame 7 and the upper part of the lower docking frame 17 are sealed and fixed by a sealant and connected by welding.

[0036] The docking conductive mechanism includes two connecting seats 21, two docking conductive shafts 22 and two fastening threaded sleeves 23. The two connecting seats 21 are both arranged on the insulating protection seat 16. The two ends of the second winding 20 are electrically connected to the two connecting seats 21 respectively. The insulating protection seat 16 is a hollow structure. Two threaded holes are arranged on one side of the insulating protection seat 16. External threads are arranged on the outer wall of the docking conductive shaft 22. Each docking conductive shaft 22 is installed in a threaded hole and extends to the inside of the insulating protection seat 16. Each docking conductive shaft 22 is electrically connected to a connecting seat 21. A fastening threaded sleeve 23 is installed at one end of each docking conductive shaft 22 located outside the insulating protection seat 16. Each fastening threaded sleeve 23 is tightly pressed against the outer wall of the insulating protection seat 16. The docking conductive shaft 22 is further locked and fixed by installing the fastening threaded sleeve 23. The two fastening threaded sleeves 23 are used to connect with external lines, so as to perform detection work on the external lines.

[0037] Specifically, each of the butted conductive shafts 22 is directly in contact with one of the connection bases 21 , or each of the butted conductive shafts 22 is connected to one of the connection bases 21 via a wire.

[0038] When in use, the external line is connected by tightening the threaded sleeve 23, and the current is transmitted to the second winding 20 through the docking conductive shaft 22 and the connecting seat 21. At this time, the first winding 19 and the iron core 18 are induced by electromagnetic action and transmitted to the voltage detection component 5 for detection, thereby facilitating the information inspection of the external line.

[0039] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A medium and high voltage digital transformer, characterized in that: It includes a base, a mutual inductance mechanism, a docking conductive mechanism, an insulating shell, an elastic limiting mechanism, a voltage detection component and an insulating porcelain sleeve, wherein the insulating porcelain sleeve is arranged on the upper part of the insulating shell and is connected with the insulating shell, the voltage detection component is arranged on the outside of the insulating shell, the lower part of the insulating shell is an open structure, and the elastic limiting mechanism is arranged in the insulating shell; the docking conductive mechanism is arranged on the base, the mutual inductance mechanism includes an iron core, a first winding and a second winding, the iron core is arranged on the upper part of the base, the first winding and the second winding are respectively wound on both sides of the iron core, the first winding is electrically connected to the voltage detection component, the second winding is electrically connected to the docking conductive mechanism, the lower part of the insulating shell is sealed and connected to the upper part of the base, and the elastic limiting mechanism is located inside the iron core and is used to limit and support the iron core.

2. The medium and high voltage digital transformer according to claim 1, characterized in that: The elastic limiting mechanism includes a guide rod, a first spring, two limiting blocks and two connecting frames, the upper parts of the two connecting frames are fixed in the insulating protective shell, the two ends of the guide rod are respectively fixed to the lower parts of the two connecting frames, the first spring and the two limiting blocks are both sleeved on the guide rod, and the two limiting blocks are respectively located on both sides of the first spring, and the two limiting blocks are respectively used to abut against the left and right sides of the inside of the iron core.

3. The medium and high voltage digital transformer according to claim 2, characterized in that: The connecting frame includes a horizontal plate and a vertical plate arranged below the horizontal plate, the horizontal plate is fixed in the insulating protective shell, and the two ends of the guide rod are respectively fixed on the two vertical plates.

4. The medium and high voltage digital transformer according to claim 2, characterized in that: The elastic limiting mechanism also includes two elastic supporting components, each of which is arranged at one end of the limiting block away from the guide rod, and the elastic supporting components are used to abut against the front and rear sides of the inside of the iron core.

5. The medium and high voltage digital transformer according to claim 4, characterized in that: The elastic support assembly includes two support blocks, two second springs and two hinged seats. The two support blocks are respectively hinged to the front and rear sides of the limit block away from one end of the guide rod through the two hinged seats. A second spring is installed between each support block and the limit block. The two support blocks are respectively used to abut the front and rear sides of the inside of the iron core.

6. The medium and high voltage digital transformer according to claim 1, characterized in that: It also includes a protection seat and a docking seat, the docking seat is arranged on the upper part of the insulating shell, the protection seat is arranged on the upper part of the docking seat, the insulating porcelain sleeve is arranged on the upper part of the protection seat, and the insulating porcelain sleeve, the protection seat, the docking seat and the insulating shell are connected in sequence.

7. The medium and high voltage digital transformer according to claim 6, characterized in that: The insulating porcelain sleeves are provided in two numbers, and the two insulating porcelain sleeves are respectively provided on both sides of the upper part of the protection seat.

8. The medium and high voltage digital transformer according to claim 1, characterized in that: It also includes a signal transmitter, which is electrically connected to the voltage detection component.

9. The medium and high voltage digital transformer according to claim 1, characterized in that: The base includes a bottom plate, an insulating protection seat and a lower docking frame, the insulating protection seat is fixed to the upper part of the bottom plate, the lower docking frame is fixed to the upper part of the insulating protection seat, and the docking conductive mechanism is arranged on the insulating protection seat; an upper docking frame is arranged at the lower part of the insulating protective shell, and the upper docking frame is sealed and connected to the lower docking frame.

10. The medium and high voltage digital transformer according to claim 9, characterized in that: The docking conductive mechanism includes two connecting seats, two docking conductive shafts and two fastening threaded sleeves. The two connecting seats are both arranged on the insulating protection seat. The two ends of the second winding are electrically connected to the two connecting seats respectively. The insulating protection seat is a hollow structure. Two threaded holes are arranged on one side of the insulating protection seat. External threads are arranged on the outer wall of the docking conductive shaft. Each of the docking conductive shafts is installed in one of the threaded holes and extends to the interior of the insulating protection seat. Each of the docking conductive shafts is electrically connected to one of the connecting seats. A fastening threaded sleeve is installed at one end of each of the docking conductive shafts located outside the insulating protection seat. The two fastening threaded sleeves are used to connect to external lines.

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