CN217035376U - Voltage divider and voltage transformer - Google Patents
Voltage divider and voltage transformer Download PDFInfo
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- CN217035376U CN217035376U CN202220986084.0U CN202220986084U CN217035376U CN 217035376 U CN217035376 U CN 217035376U CN 202220986084 U CN202220986084 U CN 202220986084U CN 217035376 U CN217035376 U CN 217035376U
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Abstract
The utility model discloses a voltage divider, which comprises a base, a low-voltage arm, a high-voltage arm and an insulating support flange, wherein the low-voltage arm is connected with the high-voltage arm; the base is provided with a hollow composite insulator, the top end of the hollow composite insulator is provided with a top end wiring flange, and the base, the hollow composite insulator and the top end wiring flange enclose a closed air chamber; the low-pressure arm is arranged on the base and is positioned in the closed air chamber; the high-voltage arm is connected with the low-voltage arm in series and is arranged on the base through the insulating support; the high-pressure arm is positioned in the closed air chamber; the insulating support flange is arranged on the high-voltage arm and is positioned in a gap between the high-voltage arm and the inner wall of the hollow composite insulator; the outer edge of the insulating support flange is attached to or close to the inner wall of the hollow composite insulator. In the voltage divider, the high-voltage arm is provided with the insulating support flange, so that the shaking amplitude of the high-voltage arm in the hollow composite insulator can be limited, and the internal structure of the high-voltage arm is protected. The utility model also discloses a voltage transformer applying the voltage divider, which reduces the damage rate of the voltage divider in the transportation process.
Description
Technical Field
The utility model relates to the technical field of electrical equipment, in particular to a voltage divider and a voltage transformer applying the voltage divider.
Background
The voltage divider of voltage transformer increases along with voltage class, and the high-voltage arm size of voltage divider lengthens, and the vibration of jolting of voltage divider body can cause the high-voltage arm acutely to rock in the hollow composite insulator of voltage divider in the transportation, damages high-voltage arm inner structure easily.
In addition, the high-voltage arm shakes violently in the hollow composite insulator, so that the metal flange of the high-voltage arm directly collides and rubs with the inner wall of the hollow composite insulator to generate powder. Furthermore, the electrical connection of the high voltage arm is also affected by the vibration and vibration.
In summary, a problem to be solved by those skilled in the art is how to avoid the damage to the internal structure of the voltage divider due to the violent shake of the high-voltage arm caused by the jolt during transportation.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a voltage divider, wherein an insulating support flange is installed on a high-voltage arm of the voltage divider, so as to limit the swing amplitude of the high-voltage arm in a hollow composite insulator and protect the internal structure of the high-voltage arm. The utility model also provides a voltage transformer applying the voltage divider, so that the damage rate of the voltage divider in the transportation process is reduced, and the loss cost is reduced.
In order to achieve the purpose, the utility model provides the following technical scheme:
a voltage divider, comprising:
the base is provided with a hollow composite insulator, the top end of the hollow composite insulator is provided with a top end wiring flange, and the base, the hollow composite insulator and the top end wiring flange enclose a closed air chamber;
the low-pressure arm is arranged on the base and is positioned in the closed air chamber;
a high voltage arm in series with the low voltage arm and mounted to the base by an insulating strut; the high pressure arm is positioned in the closed air chamber;
the insulating support flange is arranged on the high-voltage arm and is positioned in a gap between the high-voltage arm and the inner wall of the hollow composite insulator; the outer edge of the insulating support flange is attached to or close to the inner wall of the hollow composite insulator.
Preferably, in the voltage divider, the high-voltage arm is formed by connecting a plurality of voltage dividing modules in series, an upper connecting flange and a lower connecting flange are respectively arranged at two ends of each voltage dividing module, and the adjacent voltage dividing modules are connected through the upper connecting flange and the lower connecting flange; the insulating support flange is mounted on the upper connecting flange or the lower connecting flange.
Preferably, in the voltage divider, the upper connecting flange and the lower connecting flange in the voltage dividing module are respectively provided with a concave platform and a convex platform which can be matched with each other.
Preferably, in the voltage divider, the voltage dividing module includes:
the frame comprises a middle flange, an upper connecting flange and a lower connecting flange, and the upper connecting flange, the middle flange and the lower connecting flange are sequentially connected through an insulating rod;
the high-voltage resistors are multiple and are arranged between the upper connecting flange and the middle flange and between the lower connecting flange and the middle flange;
the high-voltage capacitors are multiple and are arranged between the upper connecting flange and the middle flange and between the lower connecting flange and the middle flange.
Preferably, in the voltage divider, the top end of the high-voltage arm is provided with a first supporting block and a second supporting block through a fixing piece; the mounting hole of the first supporting block, which is matched with the fixing piece, is a step strip hole, and the step strip hole extends along the radial direction of the high-pressure arm; the mounting hole of the second supporting block matched with the fixing piece is a stepped round hole; the outer edges of the first supporting block and the second supporting block are used for tightly adhering to the inner wall of the hollow composite insulator.
Preferably, in the voltage divider, the outer layers of the first support block and the second support block are respectively provided with an insulating layer.
Preferably, in the voltage divider, an electrical connection module is further included, and the electrical connection module includes:
the shielding cylinder is arranged at the top end of the high-voltage arm through a screw; a connecting flange is arranged in the shielding cylinder, the distance from the connecting flange to the bottom of the shielding cylinder is L2, and the distance from the connecting flange to the upper end face of the opening of the shielding cylinder is L1;
the collecting pipe is L1 in length, and the bottom end of the collecting pipe is mounted on the connecting flange;
and the spring flexible wire is positioned in the storage pipe, and two ends of the spring flexible wire are respectively connected with the connecting flange and the top end wiring flange.
Preferably, in the pressure divider, an opening at a top end of the collecting pipe is a bell mouth.
Preferably, in the pressure divider, a gap is provided between the top end of the collecting pipe and the top end connecting flange.
A voltage transformer comprises a voltage divider, wherein the voltage divider is the voltage divider in any one of the technical schemes.
The utility model provides a voltage divider, which comprises a base, a low-voltage arm, a high-voltage arm and an insulating support flange, wherein the base is provided with a plurality of grooves; the base is provided with a hollow composite insulator, the top end of the hollow composite insulator is provided with a top end wiring flange, and the base, the hollow composite insulator and the top end wiring flange enclose a closed air chamber; the low-pressure arm is arranged on the base and is positioned in the closed air chamber; the high-voltage arm is connected with the low-voltage arm in series and is arranged on the base through the insulating support; the high-pressure arm is positioned in the closed air chamber; the insulating support flange is arranged on the high-voltage arm and is positioned in a gap between the high-voltage arm and the inner wall of the hollow composite insulator; the outer edge of the insulating support flange is attached to or close to the inner wall of the hollow composite insulator.
In the voltage divider provided by the utility model, the high-voltage arm is provided with the insulating support flange, so that the shaking amplitude of the high-voltage arm in the hollow composite insulator can be limited, and the internal structure of the high-voltage arm is protected.
The utility model also provides a voltage transformer applying the voltage divider, which reduces the damage rate of the voltage divider in the transportation process and reduces the loss cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a voltage divider according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a voltage divider module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electrical connection module according to an embodiment of the present invention;
wherein, in fig. 1-3:
a hollow composite insulator 101; a first support block 102; insulating support flanges 103, 104, 106; a voltage division module 105; an upper connecting flange 151; a high-voltage resistor 152; an intermediate flange 153; a lower attachment flange 154; a high-voltage capacitor 155; an insulating rod 156; a low-pressure arm 107; an insulating support 108; a base 109; a grading ring 110; an electrical connection module 111; a spring cord 1111; a collection pipe 1112; a connecting flange 1113; a shield can 1114; a second support block 112; a top terminal wiring flange 113.
Detailed Description
The embodiment of the utility model discloses a voltage divider, wherein an insulating support flange is arranged on a high-voltage arm of the voltage divider, so that the shaking amplitude of the high-voltage arm in a hollow composite insulator can be limited, and the internal structure of the high-voltage arm is protected. The embodiment of the utility model also discloses a voltage transformer applying the voltage divider, which can reduce the damage rate of the voltage divider in the transportation process and reduce the loss cost.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, an embodiment of the utility model provides a voltage divider, which includes a base 109, a low voltage arm 107, a high voltage arm, and an insulating support flange; a hollow composite insulator 101 is installed on the base 109, a top end wiring flange 113 is installed at the top end of the hollow composite insulator 101, and the base 109, the hollow composite insulator 101 and the top end wiring flange 113 enclose a closed air chamber; the low pressure arm 107 is mounted on the base 109 and located in the closed air chamber; the high-voltage arm is connected in series with the low-voltage arm 107, and the high-voltage arm is mounted on the base 109 through an insulating support 108; the high-pressure arm is positioned in the closed air chamber; the insulating support flange is arranged on the high-voltage arm and is positioned in a gap between the high-voltage arm and the inner wall of the hollow composite insulator 101; the outer edge of the insulating support flange is attached or pressed close to the inner wall of the hollow composite insulator 101. The top terminal wiring flange 113 is connected with the grading ring 110.
In the voltage divider provided by the utility model, the high-voltage arm is provided with the insulating support flange, so that the shaking amplitude of the high-voltage arm in the hollow composite insulator 101 can be limited, and the internal structure of the high-voltage arm is protected from being damaged due to violent shaking.
In addition, in the voltage divider provided by this embodiment, the insulating support flange limits the shaking amplitude of the high-voltage arm in the hollow composite insulator 101, so that the metal flange of the high-voltage arm is prevented from colliding and rubbing with the inner wall of the hollow composite insulator 101, and metal powder cannot be generated in the closed air chamber.
The insulating support 108 is sleeved on the periphery of the low-voltage wall, and the insulating support 108 has certain mechanical strength and electrical insulating performance. The high pressure arm and the low pressure arm 107 are located within the same enclosed air chamber.
The high-pressure arm is formed by connecting a plurality of voltage division modules 105 in series, and an upper connecting flange 151 and a lower connecting flange 154 are respectively arranged at two ends of each voltage division module 105; two adjacent voltage dividing modules 105 are connected by respective upper and lower connecting flanges 154; the insulating support flange is mounted on the upper connection flange 151 or the lower connection flange 154, and may be specifically configured to be mounted on an upper side of the lower connection flange 154, as shown in fig. 1, and the insulating support flanges 103, 104, and 106 are respectively mounted on an upper side of the lower connection flange 154.
Preferably, the upper connecting flange 151 and the lower connecting flange 154 of the voltage dividing module 105 are respectively provided with a concave platform and a convex platform which can be matched with each other, so that after the adjacent voltage dividing modules 105 are butted, the upper connecting flange 151 and the lower connecting flange 154 form a voltage-sharing flange, the electric field intensity of the voltage dividing module 105 can be equalized, the internal resistance and the internal capacitance of the voltage dividing module 105 can be shielded, and external interference can be prevented.
Specifically, the voltage divider module 105 includes a frame, a high voltage resistor 152 and a high voltage capacitor 155; the frame comprises the upper connecting flange 151 and the lower connecting flange 154, and further comprises a middle flange 153; the upper connecting flange 151, the middle flange 153 and the lower connecting flange 154 are connected in sequence through an insulating rod 156; the high voltage resistors 152 are multiple, and the high voltage resistors 152 are installed between the upper connecting flange 151 and the middle flange 153, and between the lower connecting flange 154 and the middle flange 153; the high voltage capacitors 155 are plural, and the high voltage capacitors 155 are installed between the upper connection flange 151 and the intermediate flange 153, and between the lower connection flange 154 and the intermediate flange 153. Four high-voltage resistors 152 are arranged, two of the high-voltage resistors are arranged between the upper connecting flange 151 and the middle flange 153, and the other two high-voltage resistors are arranged between the lower connecting flange 154 and the middle flange 153; two high-voltage capacitors 155 are provided, wherein one high-voltage capacitor 155 is arranged between the upper connecting flange 151 and the middle flange 153 and is positioned between the two high-voltage resistors 152; another high voltage capacitor 155 is mounted between the lower connecting flange 154 and the intermediate flange 153, in the middle of the two high voltage resistors 152 between the two flanges.
The voltage dividing module 105 provided by the embodiment has a two-layer structure, and two high-voltage resistors 152 are arranged between each layer, so that the redundancy configuration is realized, and the reliability of the equipment is improved. Meanwhile, the frame, the high voltage resistor 152 and the high voltage capacitor 155 of the whole voltage divider module 105 form a stable and modularized whole.
An insulating support flange is mounted at the junction between adjacent voltage divider modules 105 in the high voltage arm. The insulating support flange is formed by more than two split bodies. Preferably, the outer edge of the insulating support flange is close to the inner wall of the hollow composite insulator 101, so that the bushing of the hollow composite insulator 101 can be smoothly installed after the low-voltage arm 107 and the high-voltage arm are installed on the base 109. The insulating support flange is made of an insulating material.
The top end of the high-pressure arm (specifically, the upper connecting flange 151 at the top end of the high-pressure arm) is provided with a first supporting block 102 and a second supporting block 112 through fixing parts; the mounting hole of the first support block 102, which is matched with the fixing piece, is a step strip hole, and the step strip hole extends along the radial direction of the high-pressure arm; the mounting hole of the second supporting block 112 matched with the fixing piece is a stepped circular hole; the outer edges of the first supporting block 102 and the second supporting block 112 are respectively used for clinging to the inner wall of the hollow composite insulator 101.
In this embodiment, the outer edges of the first supporting block 102 and the second supporting block 112 are tightly attached to the inner wall of the hollow composite insulator 101, so that the whole voltage divider product is uniformly stressed and reliably fixed during horizontal transportation. The first supporting block 102 and the second supporting block 112 are respectively in a fan shape, and edges of the first supporting block and the second supporting block are respectively set to be round corners, so that the electric field intensity can be reduced, and the insulating property of a product can be improved. The mounting holes of the first supporting block and the second supporting block are stepped holes respectively, so that fastening screws used for assembling the supporting blocks are prevented from exposing the surfaces of the supporting blocks, and the local electric field intensity is prevented from being too large. When the voltage divider is transported horizontally, the first supporting block 102 is located above, and the plurality of second supporting blocks 112 are distributed on two sides and below of the voltage divider. During assembly, the first supporting block 102 is installed first, and then the second supporting block 112 is installed, so that the installation position of the second supporting block 112 can be adjusted as required, and the outer edges of the first supporting block and the second supporting block are ensured to be attached to the inner wall of the hollow composite insulator 101.
The outer layers of the first supporting block 102 and the second supporting block 112 are respectively provided with an insulating layer for preventing the aluminum plate body in the supporting block from directly contacting with the inner wall of the hollow composite insulator 101, so that the friction is avoided from generating metal powder, and the aluminum plate body is also prevented from damaging the inner wall of the hollow composite insulator 101.
The first supporting block and the second supporting block enable the top end of the high-voltage arm to be coaxial with the sleeve of the hollow composite insulator 101, so that the deformation of the high-voltage arm is reduced, and the electric field strength of the high-voltage end of the voltage divider is reduced.
The voltage divider further includes an electrical connection module 111, where the electrical connection module 111 includes:
a shielding cylinder 1114, the shielding cylinder 1114 is mounted on the top end of the high-pressure arm (specifically on the upper connecting flange 151 at the top end of the high-pressure arm) by screws; a connecting flange 1113 is installed in the shielding cylinder 1114, the distance from the connecting flange 1113 to the bottom of the shielding cylinder 1114 is L2, and the distance from the connecting flange 1113 to the upper end face of the opening of the shielding cylinder 1114 is L1;
a collecting pipe 1112, the length of the collecting pipe 1112 is L1, and the bottom end of the collecting pipe 1112 is mounted on the connecting flange 1113;
a spring cord 1111, which spring cord 1111 is located inside the storage tube 1112, and both ends of the spring cord are connected to the connection flange 1113 and the top end connection flange 113, respectively.
In the voltage divider provided by this embodiment, the electrical connection module 111 disposed at the high-voltage end of the high-voltage arm has the characteristics of voltage-sharing shielding, flexibility, stability and reliability.
Specifically, the lower ends of the storage pipe 1112 and the spring cord 1111 are fixedly connected to the connection flange 1113 by screws and nuts, respectively. The top end of the storage tube 1112 is opened to a flare so that the spring cord 1111 can return to the inside of the storage tube 1112. A gap L3 is formed between the top end of the collecting tube 1112 and the top end wiring flange 113, so that the collecting tube 1112 and the top end wiring flange 113 are prevented from being tightly pressed due to the accumulation of the installation tolerance of the voltage dividing module 105 of the high-pressure arm.
The length L1 of the storage tube 1112 needs to be determined by the length of the spring cord 1111 that is stretched and shortened when the entire potentiometer is assembled. The size of the L1 can be fixed, and the L1 is suitable for the same type of products. For different projects, the creepage specific distance requirements are different, and the height of the L2 in the shielding cylinder 1114 and the heights of the low-voltage arm 107 and the insulating support 108 in the voltage divider can be adjusted, so that the voltage divider is matched with the sleeve in the electric field distribution, and the overlarge voltage difference between the inside and the outside of the hollow composite insulator 101 is avoided. The diameter of the shielding cylinder 1114 is uniform, and when the height of the bushing is higher than that of the voltage divider, the shielding cylinder 1114 can be used for homogenizing the electric field without installing a large equalizing ring 110.
When the device is installed, the bottom of the shielding cylinder 1114 in the electrical connection module 111 is fixed at the upper connection flange 151 at the top end of the high-voltage arm of the voltage divider by using screws, then one end of the spring flexible wire 1111 is connected with the top end wiring flange 113, and then the top end wiring flange 113 is connected with the flange of the sleeve in the hollow composite insulator 101 by using fasteners. Before the top end wiring flange 113 is not completely butted with the flange of the sleeve of the hollow composite insulator 101, the spring flexible wire 1111 is in a stretching state, and after the top end wiring flange 113 is butted with the flange of the sleeve of the hollow composite insulator 101, the spring flexible wire 1111 retracts and is stored in the storage tube 1112; at this time, no matter the voltage divider is in a vertical state, a horizontal state or bumpy during transportation, the shape of the spring cord 1111 is limited by the storage tube 1112, and the spring cord 1111 cannot shake greatly, so that the possibility of breaking the spring cord 1111 is avoided.
The voltage divider is a resistance-capacitance voltage divider and can also be set as a resistance-capacitance voltage divider box.
The embodiment of the utility model also provides a voltage transformer which comprises a voltage divider, wherein the voltage divider is provided by the embodiment.
The voltage transformer applies the voltage divider provided by the embodiment, the damage rate of the voltage divider in the transportation process is reduced, and the loss cost is reduced. Of course, the voltage transformer provided in this embodiment also has other effects related to the voltage divider provided in the above embodiments, and details are not described herein.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A voltage divider, comprising:
the base is provided with a hollow composite insulator, the top end of the hollow composite insulator is provided with a top end wiring flange, and the base, the hollow composite insulator and the top end wiring flange enclose a closed air chamber;
the low-pressure arm is arranged on the base and is positioned in the closed air chamber;
a high voltage arm in series with the low voltage arm and mounted to the base by an insulating strut; the high pressure arm is positioned in the closed air chamber;
the insulating support flange is arranged on the high-voltage arm and is positioned in a gap between the high-voltage arm and the inner wall of the hollow composite insulator; the outer edge of the insulating support flange is tightly attached to or close to the inner wall of the hollow composite insulator.
2. The voltage divider according to claim 1, wherein the high voltage arm is formed by connecting a plurality of voltage dividing modules in series, an upper connecting flange and a lower connecting flange are respectively arranged at two ends of each voltage dividing module, and the adjacent voltage dividing modules are connected through the upper connecting flange and the lower connecting flange; the insulating support flange is mounted on the upper connecting flange or the lower connecting flange.
3. The voltage divider according to claim 2, wherein the upper connecting flange and the lower connecting flange of the voltage divider module are respectively provided with a concave platform and a convex platform capable of being matched with each other.
4. The voltage divider according to claim 2 or 3, characterized in that the voltage dividing module comprises:
the frame comprises a middle flange, an upper connecting flange and a lower connecting flange, and the upper connecting flange, the middle flange and the lower connecting flange are sequentially connected through an insulating rod;
the high-voltage resistors are multiple and are arranged between the upper connecting flange and the middle flange and between the lower connecting flange and the middle flange;
the high-voltage capacitors are multiple and are arranged between the upper connecting flange and the middle flange and between the lower connecting flange and the middle flange.
5. The potentiometer according to claim 2, wherein the top end of the high voltage arm is mounted with a first support block and a second support block by a fixing member; the mounting hole of the first supporting block matched with the fixing piece is a step long-strip hole, and the step long-strip hole extends along the radial direction of the high-pressure arm; the mounting hole of the second supporting block matched with the fixing piece is a stepped round hole; the outer edges of the first supporting block and the second supporting block are used for tightly adhering to the inner wall of the hollow composite insulator.
6. The potentiometer according to claim 5, wherein the outer layers of the first and second support blocks are each provided with an insulating layer.
7. The voltage divider according to claim 1, further comprising an electrical connection module, the electrical connection module comprising:
the shielding cylinder is arranged at the top end of the high-voltage arm through a screw; a connecting flange is arranged in the shielding cylinder, the distance from the connecting flange to the bottom of the shielding cylinder is L2, and the distance from the connecting flange to the upper end face of the opening of the shielding cylinder is L1;
the collecting pipe is L1 in length, and the bottom end of the collecting pipe is mounted on the connecting flange;
and the spring flexible wire is positioned in the storage pipe, and two ends of the spring flexible wire are respectively connected with the connecting flange and the top end wiring flange.
8. The potentiometer according to claim 7, wherein the top opening of the collection tube is flared.
9. The potentiometer according to claim 7, wherein there is a gap between the top end of the collection tube and the top end wire flange.
10. A voltage transformer comprising a voltage divider, characterized in that the voltage divider is according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220986084.0U CN217035376U (en) | 2022-04-25 | 2022-04-25 | Voltage divider and voltage transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220986084.0U CN217035376U (en) | 2022-04-25 | 2022-04-25 | Voltage divider and voltage transformer |
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| CN217035376U true CN217035376U (en) | 2022-07-22 |
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| CN202220986084.0U Active CN217035376U (en) | 2022-04-25 | 2022-04-25 | Voltage divider and voltage transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115629229A (en) * | 2022-12-16 | 2023-01-20 | 中国电力科学研究院有限公司 | Shielding resistance voltage divider and partial pressure measuring device |
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2022
- 2022-04-25 CN CN202220986084.0U patent/CN217035376U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115629229A (en) * | 2022-12-16 | 2023-01-20 | 中国电力科学研究院有限公司 | Shielding resistance voltage divider and partial pressure measuring device |
| WO2024125031A1 (en) * | 2022-12-16 | 2024-06-20 | 中国电力科学研究院有限公司 | Shielding resistive divider and voltage division measurement apparatus |
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