CN219935940U

CN219935940U - High-voltage connector without partial discharge

Info

Publication number: CN219935940U
Application number: CN202321626747.9U
Authority: CN
Inventors: 张磊; 齐小军; 曾超; 陈涛; 李晓堂
Original assignee: Wuhan Shuiyuan Electrical Co ltd
Current assignee: Wuhan Shuiyuan Electrical Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-10-31
Anticipated expiration: 2033-06-26

Abstract

The utility model discloses a partial discharge-free high-voltage connecting piece which comprises an air knife switch rod, an equalizing ring assembly, a thread buckling assembly and a conductive pipe sleeve assembly, wherein a first sleeve of the equalizing ring assembly is sleeved and fixed at one end of the air knife switch rod, a second sleeve of the thread buckling assembly is sleeved and fixed on the air knife switch rod, a third sleeve of the conductive pipe sleeve assembly is sleeved and fixed at the other end of the air knife switch rod, the second sleeve is positioned between the first sleeve and the third sleeve, an opening-closing equalizing ring of the equalizing ring assembly is hinged with the first sleeve, a thread buckling member of the thread buckling assembly is hinged with the second sleeve, and a conductive pipe sleeve of the conductive pipe sleeve assembly is hinged with the third sleeve. The utility model can be used as a standard component for repeated use when complex test is carried out in the shielding chamber, and the local discharge capacity of the test system cannot be raised under the high voltage of power frequency.

Description

High-voltage connector without partial discharge

Technical Field

The utility model relates to the technical field of high-voltage tests, in particular to a partial discharge-free high-voltage connector.

Background

Partial discharge testing can help determine the location and extent of insulation defects within the device, determine if a potential failure hazard exists with the device, and determine the life and reliability of the insulation. In high voltage tests, partial discharge tests are often used as a diagnostic tool for assessing the state and health of a device. Partial discharge measurement is often required in a shielded room because the partial discharge signal is usually very weak and susceptible to electromagnetic interference from the outside, resulting in errors and inaccuracies. By measuring in the shielding chamber, external electromagnetic interference can be effectively reduced, and accuracy and reliability of a measurement result are improved.

When partial discharge detection is carried out in the shielding chamber, in order to prevent the partial discharge capacity of the connecting piece of the testing system from exceeding the partial discharge capacity of the tested object, the connecting piece should adopt smooth surfaces and transition fillets, and sharp angles and edges are avoided to reduce the electric field intensity and reduce the partial discharge interference. When complex tests are performed in a shielded room, such as in order to secure a safe distance of a test object or to measure a plurality of samples at the same time, a large number of connectors are sometimes required for partial discharge amount detection in the shielded room. At present, a special high-voltage connecting wire is used, so that the manufacturing cost is high, and the support and the fixation are inconvenient when a plurality of tested products are connected.

Disclosure of Invention

The utility model aims to provide a partial discharge-free high-voltage connecting piece, which can be used as a standard piece for repeated use when complex tests are carried out in a shielding room, and can not lift the partial discharge capacity of a test system under the high voltage of power frequency.

In order to achieve the purpose, the non-partial discharge high-voltage connecting piece comprises an air knife switch rod, an equalizing ring assembly, a thread buckling assembly and a conductive pipe sleeve assembly, wherein a first sleeve of the equalizing ring assembly is sleeved and fixed at one end of the air knife switch rod, a second sleeve of the thread buckling assembly is sleeved and fixed on the air knife switch rod, a third sleeve of the conductive pipe sleeve assembly is sleeved and fixed at the other end of the air knife switch rod, the second sleeve is positioned between the first sleeve and the third sleeve, an opening-closing equalizing ring of the equalizing ring assembly is hinged with the first sleeve, a thread buckling piece of the thread buckling assembly is hinged with the second sleeve, and a conductive pipe sleeve of the conductive pipe sleeve assembly is hinged with the third sleeve.

The utility model has the beneficial effects that:

when the power frequency high-voltage test is carried out, the whole part of the non-partial-discharge high-voltage connecting piece is used as a conductor, the grading ring component is directly contacted with the high-voltage end of a tested product through the opening and closing grading ring, the threaded buckling component is in threaded connection with the insulator through the threaded buckling piece, the non-partial-discharge high-voltage connecting piece can be integrally fixed in the shielding chamber, and the conducting tube sleeve component is connected with the main high-voltage loop through the conducting tube sleeve; in addition, the grading ring and the sleeve structure can improve the electric field structure of the connecting part and shield the uneven electric field caused by the protruding part, thereby reducing the partial discharge of the connecting piece. The high-voltage connector without partial discharge can be used as a standard component for repeated use when complex tests are carried out in the shielding chamber, and the partial discharge capacity of the test system cannot be raised under the high voltage of power frequency.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

fig. 2 is a schematic diagram of an explosive structure according to the present utility model.

The novel electric knife switch comprises a 1-air knife switch rod, a 2-equalizing ring assembly, a 21-first sleeve, a 22-first U-shaped hinging rod, a 23-first I-shaped hinging rod, a 24-opening and closing equalizing ring, a 25-first punching screw rod, a 26-second punching screw rod, a 3-thread buckling assembly, a 31-second sleeve, a 32-second U-shaped hinging rod, a 33-second I-shaped hinging head, a 34-thread buckling piece, a 35-third punching screw rod, a 4-conductive pipe sleeve assembly, a 41-third sleeve, a 42-third U-shaped hinging rod, a 43-third I-shaped hinging head, a 44-conductive pipe sleeve, a 45-fourth punching screw rod, a 5-screw hole, a 6-machine meter screw, a 7-hinging shaft and an 8-clamp spring.

Detailed Description

The utility model is described in further detail below with reference to the attached drawings and specific examples:

the partial discharge-free high-voltage connecting piece as shown in fig. 1 and 2 comprises an air knife switch rod 1, a grading ring assembly 2, a thread buckling assembly 3 and a conductive pipe sleeve assembly 4, wherein a first sleeve 21 of the grading ring assembly 2 is sleeved and fixed at one end of the air knife switch rod 1, a second sleeve 31 of the thread buckling assembly 3 is sleeved and fixed on the air knife switch rod 1, a third sleeve 41 of the conductive pipe sleeve assembly 4 is sleeved and fixed at the other end of the air knife switch rod 1, the second sleeve 31 is positioned between the first sleeve 21 and the third sleeve 41, an opening-closing grading ring 24 of the grading ring assembly 2 is hinged with the first sleeve 21, a thread buckling piece 34 of the thread buckling assembly 3 is hinged with the second sleeve 31, and a conductive pipe sleeve 44 of the conductive pipe sleeve assembly 4 is hinged with the third sleeve 41.

In the above technical solution, the equalizing ring assembly 2 includes a first sleeve 21, a first U-shaped hinge rod 22, a first I-shaped hinge rod 23, and an open-close equalizing ring 24; the link of first U type articulated rod 22 and the one end threaded connection of first thread rod 25, the other end and the open-close type equalizer ring 24 fixed connection (welding) of first thread rod 25, the link of first I type articulated rod 23 and the one end threaded connection of second thread rod 26, the other end and the terminal surface threaded connection of first sleeve 21 of second thread rod 26, the articulated end of first U type articulated rod 22 passes through articulated shaft 7 with the articulated end of first I type articulated rod 23 and articulates and be connected, the side of first sleeve 21 is equipped with screw hole 5, machine meter screw 6 passes through screw hole 5 with first sleeve 21 and air knife switch pole 1 fixed connection.

In the above technical solution, the threaded fastening assembly 3 includes a second sleeve 31, a second U-shaped hinge rod 32, a second I-shaped hinge 33, and a threaded fastening member 34; the link of second U type articulated rod 32 and the one end threaded connection of third through screw 35, the other end of third through screw 35 and the side threaded connection of second sleeve 31, the link fixed connection screw fastener 34 of second I type articulated head 33, the articulated end of second U type articulated rod 32 and the articulated end of second I type articulated head 33 pass through articulated shaft 7 and are connected, the side of second sleeve 31 is equipped with screw hole 5, the mechanic's screw 6 passes through screw hole 5 with second sleeve 31 and air knife switch pole 1 fixed connection, the position of second sleeve 31 on air knife switch pole 1 is adjustable.

In the above technical scheme, the conductive tube sleeve assembly 4 includes a third sleeve 41, a third U-shaped hinge rod 42, a third I-shaped hinge joint 43 and a conductive tube sleeve 44, where the connection end of the third U-shaped hinge rod 42 is fixedly connected with the side surface of the conductive tube sleeve 44, the connection end of the third I-shaped hinge joint 43 is screwed with one end of a fourth penetrating screw 45, the other end of the fourth penetrating screw 45 is screwed with the end surface of the third sleeve 41, the hinge end of the third U-shaped hinge rod 42 is hinged with the hinge end of the third I-shaped hinge joint 43 through a hinge shaft 7, a screw hole 5 is provided on the side surface of the third sleeve 41, and a machine screw 6 fixedly connects the third sleeve 41 with the air knife switch lever 1 through the screw hole 5.

In the technical scheme, the whole connecting piece is required to extend and retract under the action of the push rod motor, and the flexible connection of the connecting piece is realized by the hinge structure of the U-shaped hinge rod and the I-shaped hinge joint. In the actual partial discharge test process, the push rod motor drives the whole connecting piece to repeatedly lift and descend, the flexible connection can adapt to the deformation of the structure to a certain extent, stress concentration is reduced or eliminated, and the durability and reliability of the whole connecting piece are improved.

In the above technical scheme, the hinge shaft 7 is provided with a clamp spring 8. The clamp spring 8 is used for fixing the hinge shaft 7 and limiting the left-right shaking of the U-shaped hinge rod and the I-shaped hinge joint.

In the above-mentioned technical solution, the inner diameters of the first sleeve 21, the second sleeve 31 and the third sleeve 41 are equal, and the outer diameters of the first sleeve 21, the second sleeve 31 and the third sleeve 41 are equal.

The equalizing ring assembly 2 can enlarge the contact surface with the measured object so as to reduce partial discharge interference; the screw thread buckling component 3 can be connected with the insulating component, so that the whole body is convenient to fix flexibly; the conductive tube sleeve assembly 4 can be connected with a metal loop bar to prolong the testing distance. The high-voltage connector without partial discharge is used in a shielding room, meets the high-voltage control level during partial discharge detection, and reduces the occurrence probability of electric field concentration and partial discharge.

When the utility model is used, the open-close type grading ring 24 is directly connected with the high-voltage end of the measured object, the threaded buckling piece 34 is connected with the insulator, the whole connecting piece is conveniently fixed at the top end of the shielding chamber, the conductive pipe sleeve 44 is connected with the conductive metal round pipe, the equipotential connection of n groups of connecting pieces is conveniently realized, the air knife switch rod 1 is used for conducting electricity and simultaneously has a connecting function, and the open-close type grading ring 24 is directly connected with the high-voltage end of the measured object; the thread buckling component 3 is fixed in the shielding chamber through a thread buckling piece 34; the conductive tube sleeve assembly 4 is connected with a conductive tube with the inner diameter of 60mm through the conductive tube sleeve 44; the outer diameters of the first sleeve 21, the second sleeve 31 and the third sleeve 41 are 65mm, and the inner diameters are 25mm; the outer diameter of the conductive tube sleeve 44 is 100mm and the inner diameter is 60mm. Through the use of equalizer ring and sleeve structure, can change the distribution of electric field, the inhomogeneous condition of electric field intensity that the adjacent connection salient position caused is shielded, makes electric field intensity tend to be even between different regions to reduce electric field intensity difference, reach the purpose of balanced electric field intensity. Therefore, the integral partial discharge level of the connecting piece is smaller than 2pC under 50kV, and the connecting piece can be used as a standard connecting piece in a high-voltage partial discharge measurement environment in a shielded room.

What is not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. The utility model provides a high-pressure connecting piece is put to no office which characterized in that: including air knife switch pole (1), equalizer ring subassembly (2), screw thread withhold subassembly (3) and electrically conductive pipe sleeve subassembly (4), first sleeve (21) of equalizer ring subassembly (2) cup joint and fix the one end at air knife switch pole (1), second sleeve (31) of screw thread withhold subassembly (3) cup joint and fix on air knife switch pole (1), third sleeve (41) of electrically conductive pipe sleeve subassembly (4) cup joint and fix the other end at air knife switch pole (1), second sleeve (31) are located between first sleeve (21) and third sleeve (41), open and shut equalizer ring (24) of equalizer ring subassembly (2) are articulated with first sleeve (21), screw thread withhold piece (34) of screw thread withhold subassembly (3) are articulated with second sleeve (31), electrically conductive pipe sleeve (44) of electrically conductive pipe sleeve subassembly (4) are articulated with third sleeve (41).

2. The partial discharge-free high-voltage connector according to claim 1, wherein: the equalizing ring assembly (2) comprises a first sleeve (21), a first U-shaped hinging rod (22), a first I-shaped hinging rod (23) and an open-close equalizing ring (24); the connecting end of a first U-shaped hinging rod (22) is in threaded connection with one end of a first punching screw rod (25), the other end of the first punching screw rod (25) is fixedly connected with an opening-closing equalizing ring (24), the connecting end of the first I-shaped hinging rod (23) is in threaded connection with one end of a second punching screw rod (26), the other end of the second punching screw rod (26) is in threaded connection with the end face of a first sleeve (21), the hinging end of the first U-shaped hinging rod (22) is in hinged connection with the hinging end of the first I-shaped hinging rod (23) through a hinging shaft (7), a screw hole (5) is formed in the side face of the first sleeve (21), and a machine meter screw (6) is used for fixedly connecting the first sleeve (21) with an air knife switch rod (1) through the screw hole (5).

3. The partial discharge-free high-voltage connector according to claim 1, wherein: the thread buckling component (3) comprises a second sleeve (31), a second U-shaped hinging rod (32), a second I-shaped hinging head (33) and a thread buckling piece (34); the link of second U type articulated rod (32) and the one end threaded connection of third through screw rod (35), the other end of third through screw rod (35) and the side threaded connection of second sleeve (31), link fixed connection screw buckling piece (34) of second I type articulated head (33), the articulated end of second U type articulated rod (32) and the articulated end of second I type articulated head (33) are articulated through articulated shaft (7), the side of second sleeve (31) is equipped with screw hole (5), machine meter screw (6) are through screw hole (5) with second sleeve (31) and air knife switch pole (1) fixed connection.

4. The partial discharge-free high-voltage connector according to claim 1, wherein: the utility model provides a conductive tube sleeve subassembly (4) includes third sleeve (41), articulated pole (42) of third U type, articulated joint (43) of third I type and conductive tube sleeve (44), the link of articulated pole (42) of third U type and the side fixed connection of conductive tube sleeve (44), the link of articulated joint (43) of third I type and the one end threaded connection of fourth through screw (45), the terminal surface threaded connection of the other end of fourth through screw (45) and third sleeve (41), the articulated end of articulated pole (42) of third U type and the articulated end of articulated joint (43) of third I type pass through articulated axle (7) and are articulated to be connected, the side of third sleeve (41) is equipped with screw hole (5), mechano-meter screw (6) are with third sleeve (41) and air knife switch pole (1) fixed connection through screw hole (5).

5. The partial discharge-free high voltage connector according to claim 2 or 3 or 4, wherein: and a clamp spring (8) is arranged on the hinge shaft (7).

6. The partial discharge-free high-voltage connector according to claim 1, wherein: the inner diameters of the first sleeve (21), the second sleeve (31) and the third sleeve (41) are equal, and the outer diameters of the first sleeve (21), the second sleeve (31) and the third sleeve (41) are equal.