CN211785888U

CN211785888U - Sleeve pipe measuring device

Info

Publication number: CN211785888U
Application number: CN201922195561.2U
Authority: CN
Inventors: 张镱议; 刘捷丰
Original assignee: Guangxi University
Current assignee: Guangxi University
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-10-27
Anticipated expiration: 2029-12-10

Abstract

The utility model relates to the technical field of casing dielectric test, in particular to a casing measuring device, which comprises a casing measuring device; the oil tank comprises a tank body, an insulating base arranged in an inner cavity of the tank body, a cover ring, an insulating plate arranged on the cover ring, two binding posts and a seat cover arranged on the insulating plate, a rotary table arranged on the seat cover, telescopic binding posts sleeved in the rotary table and the seat cover, a shielding ring, a copper foil, an oil discharge pipe and an exhaust pipe. The utility model can fix the casing model and adapt to the lengths of casing models of different models by rotating the rotary table to lift the telescopic binding post; the insulating base and the insulating plate can insulate and isolate the charged parts from each other, so that the phenomena of short circuit and electric leakage are avoided, and the test process is safer; the design of the shielding ring can avoid the partial discharge phenomenon in the test process, so that the test result is more accurate.

Description

Sleeve pipe measuring device

Technical Field

The utility model belongs to the technical field of the sleeve pipe dielectric test, in particular to sleeve pipe measuring device.

Background

High voltage bushings have been rapidly developed in recent years, have an important role in power systems, and have been widely used in various transformers and circuit breakers. The high-voltage bushing is used as a key component of power equipment such as a power transformer, a circuit breaker and the like, and the operation reliability of the high-voltage bushing has important influence on the safety and stability of a power grid. At present, more than 80% of running bushings in the world are oiled paper condenser bushings, the accidents of shutdown or damage of the power transformer caused by bushing faults account for 25% -30% of the fault events of the power transformer, and the bushing faults caused by damp and aging defects account for about 40%, so that the damp and aging analysis of the bushings is of great importance. However, the sensitivity of the traditional analysis method for the aging and the moisture of the casing pipe is poor, and the field test effect is poor. In recent years, dielectric response methods using dielectrics as test objects become hot research at home and abroad, and the dielectric response methods are mainly classified into a return voltage method, a polarization/depolarization current method and a frequency domain dielectric spectroscopy. The method has the advantages of nondestructive measurement, rich carried insulation information and the like, so that the damp and aging conditions of the sleeve are analyzed by a dielectric response measurement technology at present. Since the high-voltage bushing is expensive in manufacturing cost and the testing process is not economical, the insulation state diagnosis research of the bushing in a laboratory by using a bushing model becomes a universal research scheme. However, the casing model in the laboratory is not supported by the shell, the dielectric response testing device is difficult to directly measure the casing model, certain danger exists during measurement, the safety factor is low, and the length of the copper pipe at the center of the casing models of different models is not needed, so that the casing models which can support and fix different models are manufactured, the test process is convenient and safe, and the reliable testing device becomes the problem to be solved urgently.

Disclosure of Invention

An object of the utility model is to provide a sleeve pipe measuring device to in having solved current sleeve pipe dielectric test experiment, the sleeve pipe model of the fixed different models of unable support, inconvenient measurement during the experiment, the problem that reliability and security are low.

In order to achieve the above object, the utility model provides a casing pipe measuring device, include: the tank body is internally provided with an inner cavity, one end of the inner cavity extends outwards from one end of the tank body to form a tank opening, the other end of the inner cavity is provided with an insulating base, and the insulating base is provided with a first positioning hole; the cover ring is matched with the tank opening, an insulating plate is arranged in the middle of the cover ring, two binding posts are arranged on the insulating plate, and the binding posts extend from one side of the insulating plate to the other side of the insulating plate; one end of the seat sleeve is arranged on one side of the insulating plate, the other end of the seat sleeve extends out of the other side of the insulating plate, a seat sleeve hole is formed in the seat sleeve, the seat sleeve hole extends outwards from the two ends of the seat sleeve, and a clamping block is arranged on the hole wall of the seat sleeve hole; the rotary table is arranged at one end of the seat cover in a rotatable mode, a threaded through hole is formed in the rotary table, the axis of the threaded through hole is overlapped with the rotation axis of the rotary table, and the threaded through hole is opposite to one end of the seat cover hole; the telescopic binding post is sleeved in the seat sleeve hole and the threaded through hole, an external thread matched with the threaded through hole is arranged at one end of the telescopic binding post, a sliding groove matched with the clamping block is further formed in the telescopic binding post, a second positioning hole is formed in the other end of the telescopic binding post, and the orifice of the second positioning hole is aligned with the orifice of the first positioning hole.

Preferably, among the above-mentioned technical scheme, still including locating oil extraction pipe on the jar body, oil extraction pipe with the inner chamber is linked together.

Preferably, in the above technical scheme, the air-extracting device further comprises an air-extracting pipe arranged on one side of the insulating plate, and the air-extracting pipe is communicated with the other side of the insulating plate.

Preferably, in the above technical scheme, valves are respectively arranged on the oil discharge pipe and the air suction pipe.

Preferably, in the above technical solution, the connector further includes a shielding ring, and the shielding ring is connected to one of the terminals through a first wire.

Preferably, in the above technical solution, the connector further includes a copper foil, which is connected to another of the terminals through a second conductive wire.

Preferably, among the above-mentioned technical scheme the jar body with be equipped with the clamp between the apron, the clamp be used for with the jar body with lock each other between the apron.

Preferably, in the above technical scheme, the insulating base is made of polytetrafluoroethylene, and the insulating plate is made of acrylic material.

Preferably, in the above technical scheme, both ends of the binding post and one end of the telescopic binding post are provided with a wiring copper nose.

Preferably, in the above technical solution, a chamfer is chamfered at an orifice of the second positioning hole.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the telescopic binding post in the utility model can be lifted and lowered by the rotation of the turntable, so that the copper pipe in the casing model can be fixed and is convenient to disassemble; and the length of copper pipes of different models of casing pipe models can be adapted by adjusting the clamping height, so that the casing pipe models can be fixed.

2. The shielding ring can be grounded through one wiring terminal, so that the partial discharge phenomenon in the test process can be avoided, and the test result is more accurate.

3. All the charged parts in the device are separated by insulating materials, so that the phenomena of short circuit and electric leakage are prevented, and the test process is safer.

Drawings

Fig. 1 is a structural diagram of the casing pipe measuring device of the present invention.

Fig. 2 is a structural view of a covering portion of the present apparatus.

Fig. 3 is a cross-sectional view of the sleeve and the dial.

Fig. 4 is a cross-sectional view of the telescopic stud.

Fig. 5 is a structural view of the can body.

Description of the main reference numerals:

1-tank body, 2-cover ring, 3-insulating plate, 4-binding post, 5-seat cover, 6-rotary table, 7-telescopic binding post, 8-oil discharge pipe, 9-air suction pipe, 10-valve, 11-inner cavity, 12-tank opening, 13-insulating base, 14-first positioning hole, 21-shielding ring, 22-first lead, 23-copper foil, 24-second lead, 25-clamp, 26-wiring copper nose, 51-seat cover hole, 52-clamping block, 53-flange plate, 61-thread through hole, 71-sliding groove and 72-second positioning hole.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

As shown in fig. 1 to 5, the casing measuring device in this embodiment includes: the oil tank comprises a tank body 1, a cover ring 2, an insulating plate 3, a binding post 4, a seat cover 5, a rotary table 6, a telescopic binding post 7, an oil discharge pipe 8, an exhaust pipe 9, a valve 10, an inner cavity 11, a tank opening 12, an insulating base 13, a first positioning hole 14, a shielding ring 21, a first lead 22, a copper foil 23, a second lead 24, a hoop 25, a wiring copper nose 26, a seat cover hole 51, a clamping block 52, a flange plate 53, a threaded through hole 61, a sliding groove 71 and a second positioning hole 72. The tank body 1 is cylindrical, a cylindrical inner cavity 11 is arranged in the tank body, one end of the inner cavity 11 extends outwards from one end of the tank body 1 to form a tank opening 12, the other end of the inner cavity forms a cavity bottom, a polytetrafluoroethylene insulating base 13 is fixed in the middle of the cavity bottom, and a cylindrical first positioning hole 14 is formed in the center of the insulating base 13; the side surface of the tank body 1 close to the tank opening 12 is provided with an outer edge protruding outwards; an oil discharge pipe 8 is arranged on the side wall of the tank body 1 near the bottom of the cavity, the oil discharge pipe 8 is communicated with the inner cavity 11, and a valve 10 is arranged on the oil discharge pipe 8. The cover ring 2 and the insulating plate 3 together form a covering part of the device, the size of the cover ring 2 is matched with that of the tank opening 12, the cover ring can just cover the tank opening 12, the middle part of one side of the cover ring 2 is fixed with the other side of the circular insulating plate 3 made of acrylic materials through screws, and the diameter of the insulating plate 3 is larger than the inner diameter of the cover ring 2; when the other side of the cover ring 2 is arranged on the tank opening 13, one side of the insulating plate 3 is back to the inner cavity 11, and the clamp 25 can mutually sleeve and lock the edge of the cover ring 2 and the outer edge of the tank body 1; one end of the seat sleeve 5 is welded with a flange plate 53, the flange plate 53 is fixed on one side of the insulating plate 3 through screws, and the other end of the seat sleeve 5 penetrates through the insulating plate 3 and extends to the other side of the insulating plate 3; the seat cover 5 is provided with a seat cover hole 51, the seat cover hole 51 extends outwards from two ends of the seat cover 5, a clamping block 52 is arranged on the inner wall of the seat cover hole 51, one end of the seat cover 5 is provided with an annular groove, and the axis of the annular groove is superposed with the axis of the seat cover hole 51. The rotary disc 6 is arranged at one end of the seat sleeve 5, and one end of the rotary disc is clamped in the annular groove so as to rotate around the seat sleeve hole 51; the middle part of the rotating disk 6 is provided with a threaded through hole 61, the axis of the threaded through hole 61 is coincident with the rotation axis of the rotating disk 6, so as to be coincident with the axis of the seat sleeve hole 51, and the hole opening at one end of the threaded through hole 61 is aligned with the hole opening at one end of the seat sleeve hole 51. One end of the telescopic binding post 7 is provided with a wiring copper nose 26, the end surface of the other end is provided with a second positioning hole 72, and the orifice of the second positioning hole 72 is inverted with a chamfer angle with a guiding function; the side surface close to one end of the telescopic binding post 7 is provided with an external thread matched with the internal thread of the threaded through hole 61, the telescopic binding post 7 is provided with a sliding groove 71, the sliding groove 71 is parallel to the axis of the telescopic binding post 7, the size of the sliding groove 71 is matched with that of the fixture block 52, and the sliding groove 71 extends outwards from one end of the telescopic binding post 7; when the telescopic post 7 is simultaneously sleeved in the sleeve hole 51 and the threaded through hole 61, the opening of the second positioning hole 72 is exactly aligned with the opening of the first positioning hole 14. On the insulation board 3, a terminal 4 is installed respectively to the both sides of seat cover 5, and the one end of two terminal 4 is fixed in one side of insulation board 3, and the other end of terminal 4 passes insulation board 3 and stretches to the opposite side of insulation board 3, and the both sides of terminal 4 all are equipped with a wiring copper nose 26. An exhaust tube 9 is further arranged on one side of the insulating plate 3, one end of the exhaust tube 9 is connected with a valve 10, and the other end of the exhaust tube passes through the insulating plate 3 and leads to the other side of the insulating plate 3. The shielding ring 21 is connected with a wiring copper nose 26 of the wiring terminal 4 on the other side of the insulating plate 3 through a first wire 22; the copper foil 23 is connected via a second conductor 24 to a terminal copper lug 26 of the other terminal 4 on the other side of the insulating plate 3.

Next, a detailed description will be given of a method of using the casing pipe measuring device in this embodiment, so as to make those skilled in the art understand the present invention:

firstly, inserting one end of a copper pipe of a casing pipe model to be tested into a first positioning hole 14 for fixation, and then injecting insulating oil into an inner cavity 11 to ensure that the casing pipe model is completely inserted into the insulating oil;

secondly, sleeving a shielding ring 21 on the casing model to be tested, connecting the shielding ring 21 with one end of one binding post 4 facing the inner cavity 11 by using a first lead 22, and grounding the end of the binding post 4 leaking outside;

thirdly, attaching the copper foil 23 to the casing model to be measured, connecting the copper foil 23 with one end of the other binding post 4 facing the inner cavity 11 by using a second lead 24, and connecting the end of the binding post 4 leaking outside with a measuring line on a measuring instrument;

fourthly, covering the covering part at the tank opening 12, and locking the cover ring 2 and the tank body 1 with a hoop 25;

fifthly, connecting a high-voltage measuring line of the testing instrument to a wiring copper nose 26 at one end of the telescopic binding post 7, and rotating the rotary table 6 to enable the telescopic binding post 7 to slide downwards until the other end of a copper pipe of the casing model to be tested is clamped;

sixthly, opening a valve 10 at the position of the exhaust tube 9, connecting the exhaust tube 9 with an exhaust pump, vacuumizing the inner cavity 11, and then performing a dielectric test experiment;

step seven, when the experiment is finished, firstly opening a valve 10 at the position of the exhaust pipe 9 to balance the internal pressure and the external pressure of the tank body 1, and then disassembling the casing model according to the method from the step five to the step one, which is not described again; if the insulating oil needs to be replaced through the oil discharge pipe 8.

To sum up, the utility model can not only realize the fixation of the casing pipe model, but also adapt to the lengths of casing pipe models of different models by rotating the turntable so as to lift the telescopic binding post; the insulating base and the insulating plate can insulate and isolate the charged parts from each other, so that the phenomena of short circuit and electric leakage are avoided, and the test process is safer; the design of the shielding ring can avoid the partial discharge phenomenon in the test process, so that the test result is more accurate.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A casing measurement device, comprising:

the tank comprises a tank body (1), wherein an inner cavity (11) is formed in the tank body (1), one end of the inner cavity (11) extends outwards from one end of the tank body (1) to form a tank opening (12), the other end of the inner cavity (11) is provided with an insulating base (13), and the insulating base (13) is provided with a first positioning hole (14);

the cover ring (2) is matched with the tank opening (12), an insulating plate (3) is arranged in the middle of the cover ring (2), two binding posts (4) are arranged on the insulating plate (3), and the binding posts (4) extend from one side of the insulating plate (3) to the other side of the insulating plate (3);

one end of the seat sleeve (5) is arranged on one side of the insulating plate (3), the other end of the seat sleeve (5) extends out of the other side of the insulating plate (3), a seat sleeve hole (51) is formed in the seat sleeve (5), the seat sleeve hole (51) extends outwards from two ends of the seat sleeve (5), and a clamping block (52) is arranged on the wall of the seat sleeve hole (51);

the rotary table (6) is arranged at one end of the seat cover (5) in a rotatable mode, a threaded through hole (61) is formed in the rotary table (6), the axis of the threaded through hole (61) is overlapped with the rotation axis of the rotary table (6), and the threaded through hole (61) is opposite to one end of the seat cover hole (51); and

the telescopic wiring terminal (7) is sleeved with the seat sleeve hole (51) and the threaded through hole (61), one end of the telescopic wiring terminal (7) is provided with an external thread matched with the threaded through hole (61), a sliding groove (71) matched with the clamping block (52) is further formed in the telescopic wiring terminal (7), the other end of the telescopic wiring terminal (7) is provided with a second positioning hole (72), and the hole opening of the second positioning hole (72) is aligned with the hole opening of the first positioning hole (14).

2. A casing measuring device according to claim 1, further comprising an oil drain pipe (8) provided on the tank (1), the oil drain pipe (8) being in communication with the inner chamber (11).

3. The casing measuring device according to claim 2, further comprising a suction pipe (9) provided on one side of the insulating plate (3), the suction pipe (9) communicating with the other side of the insulating plate (3).

4. Casing measuring device according to claim 3, characterised in that a valve (10) is provided on the oil drain pipe (8) and the suction pipe (9), respectively.

5. Bushing measuring device according to claim 1, further comprising a shielding ring (21) connected to one of the terminals (4) by a first wire (22).

6. Bushing measuring device according to claim 1, further comprising a copper foil (23) connected to another of said terminals (4) by a second wire (24).