CN210572583U - Device for testing voltage transformer - Google Patents
Device for testing voltage transformer Download PDFInfo
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- CN210572583U CN210572583U CN201921169002.8U CN201921169002U CN210572583U CN 210572583 U CN210572583 U CN 210572583U CN 201921169002 U CN201921169002 U CN 201921169002U CN 210572583 U CN210572583 U CN 210572583U
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Abstract
The utility model discloses a device for voltage transformer test, which belongs to the field of voltage transformer testing devices and comprises an epoxy resin shell, wherein a cavity and a high-voltage conducting rod are arranged in the epoxy resin shell, one end of the high-voltage conducting rod is connected with a high-voltage cover, and the side wall of the high-voltage cover is connected with a high-voltage equalizing cover; the bottom surface of the epoxy resin shell is connected with the mounting plate a, the mounting plate a is provided with the embedded nut, the embedded nut is positioned in the epoxy resin shell and is provided with the low-voltage shielding ring, and the low-voltage shielding ring is simple in structure and operation, convenient to use and cost-saving.
Description
Technical Field
The utility model relates to a voltage transformer testing arrangement field, concretely relates to a device for voltage transformer is experimental.
Background
In recent years, a metal enclosed switchgear C-GIS gas-filled cabinet taking artificial inert gas SF6 as an insulating medium is generally popularized and applied to subway projects, a voltage transformer matched with the gas enclosed switchgear C-GIS gas-filled cabinet is a gas insulated metal shell type voltage transformer developed and designed in recent years, the whole outer surface of the voltage transformer is made of a metal shell, in actual production, the conditions that a voltage transformer induction voltage resistance test and a partial discharge test always disturb manufacturers due to insufficient surface creepage distance and incapability of meeting design requirements exist, aiming at the conditions, the produced voltage transformer needs to be tested, the current test method usually adopts SF6 gas or transformer oil as the insulating medium for testing, the SF6 gas and the transformer oil are required to be high in purity, the phenomenon of one-time high-voltage terminal discharge burning mark of the voltage transformer often occurs, and the phenomenon of no-pressure-to-ground discharge always exists, The problems of complex operation, pollution, safety and the like exist, most of the existing test devices adopt a method of separately installing and retesting, the influence of human factors is large, the corona-proof device is connected to the outside of the simple device, the operation of the test process is complex, and the test precision is low.
SUMMERY OF THE UTILITY MODEL
For solving exist not enough among the prior art, the utility model provides a device for voltage transformer is experimental will be placed the corona preventing device that constitutes by high-pressure hood, high pressure voltage-sharing cover, low pressure shield ring, inlay the dress nut and pour into a mould formula structure as an organic whole in the epoxy casing in, structure, easy operation, convenient to use practices thrift the cost.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: a device for a voltage transformer test comprises an epoxy resin shell, wherein a cavity and a high-voltage conducting rod are arranged in the epoxy resin shell, one end of the high-voltage conducting rod is connected with a high-voltage cover, and the side wall of the high-voltage cover is connected with a high-voltage-equalizing cover; the bottom surface of the epoxy resin shell is connected with a mounting plate a, an embedded nut is mounted on the mounting plate a, the embedded nut is located in the epoxy resin shell, and a low-voltage shielding ring is arranged on the embedded nut.
Furthermore, the other end of the high-voltage conducting rod is connected to the top end of the epoxy resin shell and is higher than the top end of the epoxy resin shell, the cavity is located below the high-voltage cover, a slot penetrating through the mounting plate a is formed in the mounting plate a, and the slot is communicated with the cavity.
Furthermore, a primary high-voltage terminal is inserted in the cavity, one end of the primary high-voltage terminal is connected with a rubber head, one end of the rubber head is connected with one side surface of the mounting plate b, and the other side surface of the mounting plate b is connected with a voltage transformer to be tested; the mounting plate b is fixedly connected with the mounting plate a through the fixing clamp after the primary high-voltage terminal is inserted into the cavity.
Further, the cavity includes that the terminal that communicates each other holds the chamber and the rubber head holds the chamber, the terminal holds the intracavity and is built-in to have a high-voltage terminal, the rubber head holds the intracavity and is built-in to have the rubber head, and the rubber head lateral wall passes through sealing material and connects in rubber head holds the chamber lateral wall.
Furthermore, the primary high-voltage terminal comprises a spring, a bolt and a conductor which are sequentially connected, and one end of the conductor is connected with the rubber head.
Furthermore, the epoxy resin shell comprises a thin shell and a thick shell which are connected, the thin shell and the thick shell are both cylindrical, the diameter of the thick shell is larger than that of the thin shell, the connecting surface of the thin shell and the thick shell is an inclined surface, the side wall of the thin shell is provided with a plurality of sheds a, the side wall of the thick shell is provided with a plurality of sheds b, and the number of the sheds a is more than that of the sheds b; the high-voltage conducting rod is connected with the top end of the thin shell, and the cavity is located in the thick shell.
Furthermore, the bottom of the high-voltage cover is open, a rectangular hollow structure is arranged inside the high-voltage cover, the rectangular hollow structure is provided with five inner walls, and a terminal accommodating cavity is formed between the five inner walls.
Further, the sealing material is silicone grease or vaseline.
The utility model has the advantages that: the structure and the operation are simple, the use is convenient, the cost is low, the efficiency is high, the traditional test mode that transformer oil or SF6 gas is used as a medium is replaced, the human body is harmless, the safety coefficient is high, the phenomenon of one-time high-voltage terminal discharge burning marks is avoided, the whole structure is formed by pouring epoxy resin, and the safety and the environmental protection are realized; the shielding effect is good, the reliability is high, the defect of ground discharge cannot be caused, the anti-interference capability is strong, and the problem that the high-voltage discharge cannot be increased is effectively solved.
Drawings
FIG. 1 is a sectional view of the present invention;
FIG. 2 is a side view of the structure of the present invention;
fig. 3 is a top view of the present invention;
FIG. 4 is a schematic view of the installation structure of the present invention;
FIG. 5 is a schematic view of the split structure of the present invention;
fig. 6 is a top view of the low voltage shielding ring of the present invention;
fig. 7 is a front view of the low voltage shielding ring of the present invention;
FIG. 8 is a front view of the high pressure equalizing cover of the present invention;
fig. 9 is a top view of the high-pressure equalizing cover of the present invention;
fig. 10 is a partial cross-sectional view of the high-voltage cover of the present invention;
fig. 11 is a top view of the high voltage cover of the present invention.
The reference numbers in the figures are as follows: 1. the device comprises an epoxy resin shell 1-1, a thin shell 1-2, a thick shell 2, a high-voltage conducting rod 3, a high-voltage cover 4, a high-voltage-sharing cover 5, a low-voltage shielding ring 6, mounting plates a and 7, embedded nuts 8, umbrella skirts a and 9, mounting plates b and 10, a voltage transformer to be tested 11, a rubber head 12, a spring 13, a bolt 14, a conductor 15, a primary high-voltage terminal 16, umbrella skirts b and 17, a cavity 17-1, a terminal accommodating cavity 17-2, a rubber head accommodating cavity 18 and a fixing clamp.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
A device for a voltage transformer test comprises an epoxy resin shell 1, wherein a cavity 17 and a high-voltage conducting rod 2 are arranged in the epoxy resin shell 1, one end of the high-voltage conducting rod 2 is connected with a high-voltage cover 3 in a threaded mode, the other end of the high-voltage conducting rod 2 is connected to the top end of the epoxy resin shell 1 and is higher than the top end of the epoxy resin shell 1, as shown in figures 10 and 11, the bottom of the high-voltage cover 3 is open, a rectangular hollow structure is arranged inside the high-voltage cover 3, the rectangular hollow structure is provided with five-side inner walls, the cavity 17 is located below the high-voltage cover 3, and the side wall of the high; preferably, the side wall of the high-voltage cover 3 is provided with a groove, so that the insulation area is increased; the bottom surface of the epoxy resin shell 1 is connected with a mounting plate a6, a slot which is arranged in a penetrating way is arranged on a mounting plate a6, and the slot is communicated with the cavity 17; install on the mounting panel a6 and inlay dress nut 7, inlay dress nut 7 and be located epoxy casing 1 and be equipped with low pressure shield ring 5 on it, the setting of low pressure shield ring 5 makes the whole electric field distribution of once high voltage terminal 15 even when experimental, can not be because the device itself is put the volume greatly and the influence is waited to test voltage transformer 10 and is put the level in the office, and then improves the partial volume and put testing accuracy. As shown in fig. 6 and 7, the low-voltage shielding ring 5 is a thick circular ring-shaped structure, and a plurality of arc-shaped grooves are formed in the side wall of the low-voltage shielding ring, and the distance between every two arc-shaped grooves is equal. As shown in fig. 8 and 9, the preferred high-voltage equalizing cover 4 of this embodiment is hollow inside, and includes an upper equalizing ring and a lower equalizing ring connected from top to bottom, where the upper equalizing ring and the lower equalizing ring are both circular ring-shaped structures with thickness, the diameter of the upper equalizing ring is smaller than that of the lower equalizing ring, and a stepped groove is formed at the joint of the upper equalizing ring and the lower equalizing ring.
Preferably, for solving the problems of complex operation and low test precision of the test process caused by the adoption of a simple device and an additional corona-proof device in the prior art, the corona-proof device consisting of the high-voltage cover 3, the high-voltage equalizing cover 4, the low-voltage shielding ring 5 and the embedded nut 7 is arranged in the epoxy resin shell 1 and poured into an integrated structure, the test process is simple and convenient to operate, is slightly influenced by the external warm and humid environment, avoids the influence on the whole test device caused by artificial touch on the corona-proof device, is high in test precision, saves installation time and improves working efficiency.
A primary high-voltage terminal 15 penetrates through a slot formed in the mounting plate a6 and is inserted into the cavity 17, the primary high-voltage terminal 15 comprises a spring 12, a bolt 13 and a conductor 14 which are sequentially connected, one end of the conductor 14 is connected with a rubber head 11, one end of the rubber head 11 is connected with one side surface of a mounting plate b9, and the other side surface of the mounting plate b9 is connected with a voltage transformer 10 to be tested; after the primary high-voltage terminal 15 is plugged into the cavity 17, the mounting plate b9 is fixedly connected with the mounting plate a6 through the fixing clip 18, and preferably, the mounting plate b9 is also connected with the mounting plate a6 through bolts.
The cavity 17 comprises a terminal cavity 17-1 and a rubber head cavity 17-2 which are communicated with each other, and the terminal cavity 17-1 is formed between the inner walls of the five sides of the high-voltage cover 3; a primary high-voltage terminal 15 is arranged in the terminal containing cavity 17-1, a rubber head 11 is arranged in the rubber head containing cavity 17-2, and the side wall of the rubber head 11 is connected with the side wall of the rubber head containing cavity 17-2 through organic sealing material silicone grease or vaseline. Preferably, the terminal containing cavity 17-1 is cylindrical, the rubber head containing cavity 17-2 is conical, and the minimum diameter of the rubber head containing cavity 17-2 is larger than that of the terminal containing cavity 17-1.
The epoxy resin shell 1 comprises a thin shell 1-1 and a thick shell 1-2 which are connected, wherein the thin shell 1-1 and the thick shell 1-2 are both cylindrical, the diameter of the thick shell 1-2 is larger than that of the thin shell 1-1, the connecting surface of the thin shell 1-1 and the thick shell 1-2 is an inclined surface, the side wall of the thin shell 1-1 is provided with a plurality of sheds a8, the side wall of the thick shell 1-2 is provided with a plurality of sheds b16, and the number of the sheds a8 is more than that of the sheds b 16; the high-voltage conducting rod 2 is connected with the top end of the thin shell 1-1, and the cavity 17 is positioned in the thick shell 1-2.
The manufacturing method of the utility model is as follows: after welding the high-voltage cover 3 and the high-voltage-equalizing cover 4 together, the high-voltage cover 3 is in threaded connection with the high-voltage conducting rod 2 to form a high-voltage end, meanwhile, the low-voltage shielding ring 5 is in transition fit connection with the embedded nut 7 to form a low-voltage end, the components are assembled together through a die and then cast into an integrated structure by epoxy resin, the integrated structure is arranged on an installation plate a6, a plurality of sheds a8 arranged on the side wall of a thin shell 1-1 are arranged in parallel at equal intervals, a plurality of sheds b16 arranged on the side wall of a thick shell 1-2 are arranged in parallel at equal intervals, and the cavity 17 is integrally in a row.
The test method of the utility model is as follows: the whole mounting plate a6 is mounted on a mounting plate b9 to form a testing device, a rubber head 11 is tightly contacted with the side wall of a cavity 17 of the testing device by adopting a sealing material, a voltage transformer 10 to be tested and a primary high-voltage terminal 15 are mounted on a mounting plate b9, and a mounting plate b9 is fixed with the mounting plate a6 through a fixing clamp 18 to form primary high-voltage and ground low-voltage insulation sealing; after all the terminals are installed, the terminals 2 of the high-voltage conducting rod of the testing device, the low-voltage terminal of the voltage transformer 10 to be tested and the ground are respectively connected to perform induction voltage resistance and partial discharge tests.
The above description is only the specific implementation manner of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the design of the present invention within the technical scope of the present invention.
Claims (8)
1. A device for a voltage transformer test comprises an epoxy resin shell (1), and is characterized in that a cavity (17) and a high-voltage conducting rod (2) are arranged in the epoxy resin shell (1), one end of the high-voltage conducting rod (2) is connected with a high-voltage cover (3), and the side wall of the high-voltage cover (3) is connected with a high-voltage equalizing cover (4); the bottom surface of the epoxy resin shell (1) is connected with a mounting plate a (6), an embedded nut (7) is mounted on the mounting plate a (6), and the embedded nut (7) is located in the epoxy resin shell (1) and is provided with a low-voltage shielding ring (5).
2. The device for the voltage transformer test according to claim 1, wherein the other end of the high voltage conducting rod (2) is connected to the top end of the epoxy resin shell (1) and is higher than the top end of the epoxy resin shell (1), the cavity (17) is located below the high voltage cover (3), a slot penetrating the installation plate a (6) is formed in the installation plate a, and the slot is communicated with the cavity (17).
3. The device for the voltage transformer test according to claim 1, wherein a primary high-voltage terminal (15) is inserted into the cavity (17), one end of the primary high-voltage terminal (15) is connected with a rubber head (11), one end of the rubber head (11) is connected with one side surface of a mounting plate b (9), and the other side surface of the mounting plate b (9) is connected with the voltage transformer (10) to be tested; the mounting plate b (9) is fixedly connected with the mounting plate a (6) through a fixing clamp (18) after the primary high-voltage terminal (15) is inserted into the cavity (17).
4. The device for the voltage transformer test is characterized in that the cavity (17) comprises a terminal accommodating cavity (17-1) and a rubber head accommodating cavity (17-2) which are communicated with each other, a primary high-voltage terminal (15) is arranged in the terminal accommodating cavity (17-1), a rubber head (11) is arranged in the rubber head accommodating cavity (17-2), and the side wall of the rubber head (11) is connected to the side wall of the rubber head accommodating cavity (17-2) through a sealing material.
5. The device for testing the voltage transformer according to claim 3, wherein the primary high-voltage terminal (15) comprises a spring (12), a bolt (13) and an electric conductor (14) which are connected in sequence, and one end of the electric conductor (14) is connected with the rubber head (11).
6. The device for the voltage transformer test is characterized in that the epoxy resin shell (1) comprises a thin shell (1-1) and a thick shell (1-2) which are connected, the thin shell (1-1) and the thick shell (1-2) are cylindrical, the diameter of the thick shell (1-2) is larger than that of the thin shell (1-1), the connecting surface of the thin shell (1-1) and the thick shell (1-2) is an inclined surface, the side wall of the thin shell (1-1) is provided with a plurality of umbrella skirts a (8), the side wall of the thick shell (1-2) is provided with a plurality of umbrella skirts b (16), and the number of the umbrella skirts a (8) is larger than that of the umbrella skirts b (16); the high-voltage conducting rod (2) is connected with the top end of the thin shell (1-1), and the cavity (17) is positioned in the thick shell (1-2).
7. The device for testing the voltage transformer as claimed in claim 1, wherein the high voltage cover (3) is open at the bottom and internally provided with a rectangular hollow structure, the rectangular hollow structure is provided with five inner walls, and a terminal accommodating cavity (17-1) is formed between the five inner walls.
8. The apparatus of claim 4, wherein the sealing material is silicone grease or vaseline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921169002.8U CN210572583U (en) | 2019-07-24 | 2019-07-24 | Device for testing voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921169002.8U CN210572583U (en) | 2019-07-24 | 2019-07-24 | Device for testing voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210572583U true CN210572583U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921169002.8U Active CN210572583U (en) | 2019-07-24 | 2019-07-24 | Device for testing voltage transformer |
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| CN (1) | CN210572583U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376494A (en) * | 2019-07-24 | 2019-10-25 | 大连北方互感器集团有限公司 | A kind of device for voltage transformer test |
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2019
- 2019-07-24 CN CN201921169002.8U patent/CN210572583U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376494A (en) * | 2019-07-24 | 2019-10-25 | 大连北方互感器集团有限公司 | A kind of device for voltage transformer test |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A device for voltage transformer testing Effective date of registration: 20230426 Granted publication date: 20200519 Pledgee: China Construction Bank Corporation Dalian Pulandian Branch Pledgor: DALIAN NORTH INSTRUMENT TRANSFORMER GROUP Co.,Ltd. Registration number: Y2023980039443 |