CN210350168U

CN210350168U - PD filter device

Info

Publication number: CN210350168U
Application number: CN201921389003.3U
Authority: CN
Inventors: 欧定军; 谭飞; 黄培刚
Original assignee: Shanghai Juter High Voltage Electrical & Equipment Co ltd
Current assignee: Shanghai Juter High Voltage Electrical & Equipment Co ltd
Priority date: 2019-08-24
Filing date: 2019-08-24
Publication date: 2020-04-17
Anticipated expiration: 2029-08-24

Abstract

The utility model relates to the technical field of partial discharge filtering, and discloses a PD filtering device, which comprises a metal shielding shell, wherein the metal shielding shell is connected with a metal shielding side plate, the metal shielding shell is connected with a grounding installation seat, and the grounding installation seat is connected with a filtering circuit board; one of the metal shielding side plates is connected with an insulating connecting ring, a metal conduit is tightly sleeved in the insulating connecting ring, the inner wall of the metal conduit is connected with an insulating sleeve, an input lead is arranged in the insulating sleeve in a penetrating way, and the input lead is electrically connected with a metal wiring male connector; the other metal shielding side plate is connected with a metal wiring female head which is matched with the metal wiring male head, the metal wiring female head is electrically connected with an output lead, and an insulating sleeve is sleeved outside the output lead; the metal pipe is connected with the metal shielding curb plate electricity and is realized shielding and shielding scope extension, can also let a plurality of PD filter equipment realize establishing ties, bigger promotion shielding effect.

Description

PD filter device

Technical Field

The utility model relates to a filtering technology field is put in the office, and more specifically says that it relates to a PD filter equipment.

Background

PD filtering is also called partial discharge filtering, i.e. partial discharge, in which a discharge occurs only in a local region of an insulator, but not between conductors through which a voltage is applied, and may occur in the vicinity of the conductors or elsewhere, and this phenomenon is called partial discharge. The partial discharge phenomenon mainly refers to high-voltage electrical equipment.

Such discharges are limited to causing only isolated local shorts between conductors without forming conductive paths. Each time, the local discharge has some influence on an insulating medium, the slight local discharge has small influence on the insulation of the power equipment, and the reduction of the insulation strength is slow; and strong partial discharge causes a rapid decrease in the dielectric strength. This is an important factor in causing insulation damage of high-voltage electric power equipment. Therefore, when designing the insulation of high-voltage power equipment, it is considered that relatively strong partial discharge is not allowed to occur in the insulation structure under the action of the long-term operating voltage. The monitoring of the equipment in operation needs to be strengthened, and when the partial discharge exceeds a certain degree, the equipment is required to be withdrawn from operation for maintenance or replacement.

When the product insulation is detected by using the partial discharge means, because the discharge process is only in insulating partial short circuit and the time is short, if the detection instrument is interfered by the outside, the data which is accurate and can represent the actual working condition can not be obtained, and the external interference comprises the interference of an external electromagnetic field on electronic components inside the detection instrument and the interference on leads around the shell of the detection instrument.

SUMMERY OF THE UTILITY MODEL

Can't acquire the technical problem of accuracy and can represent operating condition's data after receiving external interference to current detecting instrument, the utility model provides a PD filter equipment, it has the strong advantage of interference killing feature.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a PD filtering device comprises a metal shielding shell, wherein two opposite end parts of the metal shielding shell are fixedly connected with metal shielding side plates, a grounding mounting seat is fixedly connected inside the metal shielding shell, and the grounding mounting seat is detachably connected with a filtering circuit board;

one of the metal shielding side plates is fixedly connected with an insulating connecting ring, a metal conduit which is electrically connected with the metal shielding side plate is tightly sleeved in the insulating connecting ring, the inner wall of the metal conduit is fixedly connected with an insulating sleeve, an input lead which is electrically connected with the filter circuit board is arranged in the insulating sleeve in a penetrating manner, and one end of the input lead, which is far away from the filter circuit board, is electrically connected with a metal wiring male;

a metal wiring female head is fixedly connected to the other metal shielding side plate and matched with the metal wiring male head, the metal wiring female head is electrically connected with an output lead electrically connected with the filter circuit board, and the insulation sleeve is tightly sleeved outside the output lead;

the insulating connecting ring is tightly propped between the metal wiring female head and the metal wiring male head.

Through above-mentioned technical scheme, insulating go-between supports tightly between female head of metal wiring and the public head of metal wiring, lets both connection ground inseparabler, and the shielding and shielding scope are enlarged to metal pipe and metal shielding curb plate electricity connection realization, and the female head of metal wiring cooperatees with the public head of metal wiring, can let a plurality of PD filter equipment realize establishing ties, bigger promotion shielding effect, and the insulating cover can protect input conductor and output conductor to be difficult to be punctured, promotes its interference killing feature.

Further, public first outer wall fixedly connected with lock joint terminal of metal connection, the female head of metal connection includes coaxial interior connector ring and the outer go-between that cup joints, the public head of metal connection is pegged graft the interior connector ring with between the outer go-between and with the female first electricity of metal connection is connected, offer the confession on the outer go-between the fastening groove that the lock joint terminal buckled into, the fastening inslot is provided with fixedly the constant head tank of lock joint terminal, the opening direction of constant head tank keep away from with the lock joint terminal inserts the moving direction of the female head of metal connection, the interior connector ring with be provided with between the outer go-between and be used for the butt the elastic component of the public head of metal connection.

Through the technical scheme, the metal wiring male head is inserted between the inner connecting ring and the outer connecting ring and tightly supports the elastic piece, the fastening terminal slides into the fastening groove and is fixed in the positioning groove, and under the tight support of the elastic piece, the metal wiring male head and the metal wiring female head are fixed and electrically connected to realize the transmission of signals and the shielding of interference.

Further, the buckling groove penetrates through the end portion, far away from the metal shielding shell, of the outer connecting ring.

Through above-mentioned technical scheme, the tip joint that the fastening terminal runs through the fastening groove is gone into the fastening groove.

Furthermore, the buckling terminal is made of a metal material and is electrically connected with the metal wiring male head.

Through above-mentioned technical scheme, the electricity that the lock joint terminal can realize between public head of metal wiring and the female head of metal wiring is connected.

Furthermore, a sub-buckle of the snap-in buckle is arranged on the buckling terminal.

Through the technical scheme, the sub-buckle can be abutted against the inner edge of the positioning groove, so that the metal wiring male head cannot shake in the metal wiring female head.

Furthermore, a female buckle spring of a snap buckle is arranged on the inner wall of the positioning groove, and the female buckle spring supports the male buckle tightly and limits the male buckle in the positioning groove.

Through above-mentioned technical scheme, the spacing son of box spring is detained, lets between metal wiring male joint and the metal wiring female joint connect ground more stably.

Furthermore, the elastic piece is an elastic ring cushion which is coaxial with the outer connecting ring.

Through above-mentioned technical scheme, the elastic ring pad can provide even tight power of supporting for the public head of metal wiring, avoids the public head of metal wiring the gesture in the female head of metal wiring to take place crooked, prevents that the public head of metal wiring is not hard up in the female head of metal wiring and leads to the dropout.

Furthermore, a metal wire penetrates through the elastic ring pad, and the metal wire is electrically connected with the inner connecting ring and the outer connecting ring.

Through the technical scheme, the metal wire realizes the electric connection between the inner connecting ring and the outer connecting ring, so that the shielding area is more uniform and complete.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) through independent shielding and protection measures on the female wiring head and the male wiring head, the insulating connecting ring is abutted between the metal female wiring head and the metal male wiring head, so that the female wiring head and the metal male wiring head are connected more closely, the metal guide pipe is electrically connected with the metal shielding side plate to realize the expansion of shielding and shielding ranges, the female metal wiring head is matched with the male metal wiring head, a plurality of PD filtering devices can be connected in series, the shielding effect is improved greatly, the insulating sleeve can protect an input lead and an output lead from being punctured easily, and the anti-interference capability of the insulating sleeve is improved;

(2) by arranging the elastic piece which tightly abuts against the metal wiring male head, the metal wiring male head and the metal wiring female head are fixed and electrically connected under the abutting of the elastic piece to realize the transmission of signals and the shielding of interference;

(3) by arranging the metal wire inside the elastic piece, the metal wire is electrically connected with the inner connecting ring and the outer connecting ring, so that the shielding area is more uniform and complete.

Drawings

FIG. 1 is a schematic overall structure diagram according to a first embodiment;

FIG. 2 is a schematic partial cross-sectional view of a first embodiment;

fig. 3 is a schematic sectional view taken along line a-a of fig. 2.

Reference numerals: 1. a metal shielding can; 2. a grounding mounting seat; 3. a filter circuit board; 4. a metal shielding side plate; 5. an insulating connecting ring; 6. a metal conduit; 7. an insulating sleeve; 8. an input lead; 9. a metal wiring male head; 10. a snap-fit terminal; 11. a metal wiring female head; 12. an output lead; 14. an inner connecting ring; 15. an outer connecting ring; 16. a fastening groove; 17. positioning a groove; 18. an elastic member.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Examples

A PD filter device is shown in figures 1 and 2 and comprises a metal shielding shell 1 which is a roughly rectangular body, an inward-protruding grounding installation seat 2 is welded inside the metal shielding shell 1, a metal screw can be screwed on the grounding installation seat 2, the grounding installation seat 2 is detachably connected with a filter circuit board 3 through the metal screw, and a grounding welding spot on the filter circuit board 3 can be electrically connected with the grounding installation seat 2 through the metal screw. Two opposite end parts of the metal shielding shell 1 in the length direction are welded with metal shielding side plates 4 to surround and protect the filter circuit board 3.

One of the metal shielding side plates 4 is glued or screwed with an insulating connecting ring 5 extending outwards along the axial direction, the insulating connecting ring 5 is integrally injection molded, and a metal conduit 6 welded or buckled and electrically connected with the metal shielding side plate 4 is tightly sleeved in the insulating connecting ring 5. An insulating sleeve 7 made of rubber is glued on the inner wall of the metal conduit 6, an input lead 8 penetrates through the insulating sleeve 7, the input lead 8 is electrically connected with the filter circuit board 3, and one end, far away from the filter circuit board 3, of the input lead 8 is electrically connected with a metal wiring male head 9. The outer wall of the metal wiring male head 9 is welded with a buckling terminal 10 which extends outwards and protrudes.

A metal wiring female head 11 matched with the metal wiring male head 9 is arranged on the other metal shielding side plate 4, an output lead 12 is arranged at the innermost part of the metal wiring female head 11, the output lead 12 is electrically connected with the filter circuit board 3, and an insulating sleeve 7 made of rubber or formed by thermal shrinkage of a thermal shrinkage pipe is tightly sleeved outside the output lead 12. After the metal wiring female head 11 is matched with the metal wiring male head 9, the insulating connecting ring 5 is tightly propped between the metal wiring female head 11 and the metal wiring male head 9.

As shown in fig. 2 and 3, the metal connection female terminal 11 includes an inner connection ring 14 and an outer connection ring 15 that are coaxially sleeved and both made of metal, the metal connection male terminal 9 is inserted between the inner connection ring 14 and the outer connection ring 15 and electrically connected to the metal connection female terminal 11, a fastening groove 16 for fastening the fastening terminal 10 is formed on the outer connection ring 15, and the fastening groove 16 penetrates through the end portion of the outer connection ring 15 away from the metal shielding shell 1. A positioning groove 17 for fixing the snap-in terminal 10 is provided in the snap-in groove 16, the opening direction of the positioning groove 17 is far away from the moving direction of the snap-in terminal 10 inserted into the metal wiring female head 11, and the snap-in terminal 10 is positioned after entering the positioning groove 17 along the snap-in groove 16. An elastic member 18 is provided between the inner connection ring 14 and the outer connection ring 15. The elastic member 18 is an elastic ring pad coaxial with the outer connecting ring 15, and the elastic ring pad may be made of rubber, and in order to realize conductivity, a wire is inserted into the elastic ring pad, and the wire electrically connects the inner connecting ring 14 and the outer connecting ring 15.

The two PD filtering devices are connected in series physically and electrically, the metal wiring female head 11 is in plug-in fit with the metal wiring male head 9, the insulating connecting ring 5 is abutted between the metal wiring female head 11 and the metal wiring male head 9 tightly, the metal wiring female head and the metal wiring male head 9 are connected more tightly, and the metal conduit 6 is electrically connected with the metal shielding side plate 4 to realize shielding and expand the shielding range. The metal wiring male head 9 is inserted between the inner connecting ring 14 and the outer connecting ring 15, the buckling terminal 10 is clamped into the buckling groove 16 through the end part penetrated by the buckling groove 16, the metal wiring male head 9 is abutted against the elastic piece 18, and the metal wire realizes the electric connection between the inner connecting ring 14 and the outer connecting ring 15, so that the shielding area is more uniform and complete. The elastic ring pad can provide even supporting force for the metal wiring male head 9, the posture of the metal wiring male head 9 in the metal wiring female head 11 is prevented from being inclined, the metal wiring male head 9 is prevented from loosening in the metal wiring female head 11 and causing tripping, and under the supporting and tightening of the elastic piece 18, the metal wiring male head 9 and the metal wiring female head 11 are fixed and electrically connected to realize signal transmission and interference shielding. Can let a plurality of PD filter equipment realize establishing ties, bigger promotion shielding effect, insulating boot 7 can protect input conductor 8 and output conductor 12 to be difficult to be punctured, promotes its interference killing feature.

Example two

A PD filter device differs from the first embodiment in that a snap-fit terminal 10 is made of a metal material and is electrically connected with a metal wiring male 9. The fastening terminal 10 is welded or integrally formed with a secondary buckle of the snap buckle, the inner wall of the positioning groove 17 is provided with a primary buckle spring of the snap buckle, and the primary buckle spring supports the secondary buckle and limits the secondary buckle in the positioning groove 17. The female buckle spring limiting male buckle is abutted against the inner edge of the positioning groove 17, so that the metal wiring male head 9 is stably electrically connected with the metal wiring female head 11, meanwhile, the metal wiring male head 9 cannot shake in the metal wiring female head 11, and the metal wiring male head 9 is more stably connected with the metal wiring female head 11.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A PD filtering device comprises a metal shielding shell (1), and is characterized in that two opposite end parts of the metal shielding shell (1) are fixedly connected with metal shielding side plates (4), a grounding installation seat (2) is fixedly connected inside the metal shielding shell (1), and the grounding installation seat (2) is detachably connected with a filtering circuit board (3);

an insulation connecting ring (5) is fixedly connected to one of the metal shielding side plates (4), a metal conduit (6) electrically connected with the metal shielding side plate (4) is tightly sleeved in the insulation connecting ring (5), an insulation sleeve (7) is fixedly connected to the inner wall of the metal conduit (6), an input lead (8) electrically connected with the filter circuit board (3) penetrates through the insulation sleeve (7), and one end, far away from the filter circuit board (3), of the input lead (8) is electrically connected with a metal wiring male head (9);

a metal wiring female head (11) is fixedly connected to the other metal shielding side plate (4), the metal wiring female head (11) is matched with the metal wiring male head (9), the metal wiring female head (11) is electrically connected with an output lead (12) which is electrically connected with the filter circuit board (3), and the insulating sleeve (7) is tightly sleeved outside the output lead (12);

the insulating connecting ring (5) is tightly propped between the metal wiring female head (11) and the metal wiring male head (9).

2. The PD filter device according to claim 1, wherein a snap-in terminal (10) is fixedly connected to an outer wall of the metal male connection head (9), the metal female connection head (11) includes an inner connection ring (14) and an outer connection ring (15) which are coaxially sleeved, the metal male connection head (9) is inserted between the inner connection ring (14) and the outer connection ring (15) and electrically connected to the metal female connection head (11), a snap-in groove (16) for the snap-in terminal (10) is formed on the outer connection ring (15), a positioning groove (17) for fixing the snap-in terminal (10) is formed in the snap-in groove (16), an opening direction of the positioning groove (17) is far away from a moving direction of the snap-in terminal (10) inserted into the metal female connection head (11), and an elastic member (18) for abutting against the metal male connection head (9) is formed between the inner connection ring (14) and the outer connection ring (15) ).

3. PD filter arrangement according to claim 2, characterised in that the snap-in groove (16) extends through the end of the outer connection ring (15) remote from the metallic shield can (1).

4. PD filter device according to claim 2, characterized in that the snap-in terminal (10) is made of a metallic material and is electrically connected to the metallic terminal male (9).

5. A PD filter arrangement according to claim 4, characterised in that the snap-on terminal (10) is provided with a sub-snap of a snap-on fastener.

6. A PD filter device according to claim 5, characterised in that the inner wall of the positioning slot (17) is provided with a box spring of a snap button, which abuts against the pin and retains the pin in the positioning slot (17).

7. PD filter device according to claim 2, characterized in that the elastic element (18) is an elastic ring pad coaxial with the outer connecting ring (15).

8. PD filter device according to claim 7, characterised in that a wire is threaded inside the elastic ring pad, which wire electrically connects the inner connection ring (14) with the outer connection ring (15).