CN211670060U

CN211670060U - Open type Rogowski coil

Info

Publication number: CN211670060U
Application number: CN202020747705.0U
Authority: CN
Inventors: 梁汉祥; 孟令军
Original assignee: Wuhan Tian Tian Automatic Control Technology Co ltd
Current assignee: Wuhan Tian Tian Automatic Control Technology Co ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-10-13
Anticipated expiration: 2030-05-07

Abstract

The utility model discloses an open type rogowski coil relates to the technical field of rogowski coil, has solved the inconvenient technical problem of traditional rogowski coil dismouting. The device comprises an upper shell and a lower shell, wherein the upper shell is hinged with one side of the lower shell, and the other side of the upper shell is connected with the other side of the lower shell in a clamping manner through a buckle; the coil assembly is installed in the inner cavity of the upper shell, the lower coil assembly is installed in the inner cavity of the lower shell, and the upper coil assembly is connected with the lower coil assembly in a clamping mode through the plug-in type conductive clamping connector. The utility model discloses rational in infrastructure, convenient to use, detection are reliable, not only can be quick on the power supply line dismouting rogowski coil, still can acquire power frequency electric current and lightning current on the power supply line simultaneously.

Description

Open type Rogowski coil

Technical Field

The present invention relates to a rogowski coil, and more particularly, to an open type rogowski coil.

Background

Lightning current is a unipolar, non-periodic pulse waveform that typically rises in amplitude for a short period of time and then falls relatively slowly. The waveform of a unipolar pulsed lightning current is mainly represented by three parameters, namely the lightning current amplitude, the wave head time and the half-amplitude time. The wave front time is the time for the lightning current to rise from zero to amplitude, and is also called wave front time. The half amplitude time is the time from the maximum amplitude to half the maximum amplitude.

In power supply lines, lightning strikes are the most common cause of tripping power supply lines. The Rogowski coil is a ring coil wound on a non-ferromagnetic material, and because the Rogowski coil does not contain the ferromagnetic material and does not have the phenomenon of magnetic saturation, the Rogowski coil can measure the current of several amperes to hundreds of kiloamperes. The rogowski coil has the characteristics of wide measurement range, stability, reliability, non-contact detection and the like, so the rogowski coil is often used for detecting a power supply line with a lightning stroke fault. In order to ensure the connection reliability of the opening, the traditional Rogowski coil adopts a bolt connection fixing mode. However, in the detection process, the time for rotating the bolt is far more than the time required by the detection; in addition, when the tester forgets to take the tool, it is difficult to simply rotate the bolt by hand, which causes inconvenience in use.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to prior art, provide an open type rogowski coil, dismouting rogowski coil on the power supply line that can be quick, convenient to use.

The technical scheme of the utility model lies in: an open type Rogowski coil comprises an upper shell and a lower shell, wherein the upper shell is hinged with one side of the lower shell, and the other side of the upper shell is connected with the other side of the lower shell in a clamping manner through a buckle; the coil assembly is installed in the inner cavity of the upper shell, the lower coil assembly is installed in the inner cavity of the lower shell, and the upper coil assembly is connected with the lower coil assembly in a clamping mode through the plug-in type conductive clamping connector.

Further, the conductive card connector is a banana connector; the male head of the banana connector is connected with a coil in the upper coil assembly, and the female head of the banana connector is connected with a coil in the lower coil assembly.

Furthermore, the upper coil assembly comprises an upper lightning current detection coil and an upper circuit current detection coil, an isolation gap is arranged between the upper lightning current detection coil and the upper circuit current detection coil, and both ends of the upper lightning current detection coil and both ends of the upper circuit current detection coil are connected with a male head of a banana connector;

the lower coil assembly comprises a lower lightning current detection coil and a lower circuit current detection coil, an isolation gap is also arranged between the lower lightning current detection coil and the lower circuit current detection coil, and the two ends of the lower lightning current detection coil and the two ends of the lower circuit current detection coil are both connected with a female head of a banana connector.

Furthermore, the upper coil assembly further comprises epoxy resin poured in the upper shell, and the upper lightning current detection coil and the upper circuit current detection coil are wrapped in the epoxy resin;

the lower coil assembly further comprises epoxy resin poured in the lower shell, and the lower lightning current detection coil and the lower circuit current detection coil are wrapped in the epoxy resin.

Furthermore, the buckle includes the separation blade of installation on last casing lateral wall and installs the buckle on lower casing lateral wall, the buckle is connected with the separation blade joint.

Furthermore, the pinch plate and the baffle plate are both positioned in the middle of a circular ring formed by the two shells.

Further, the upper shell and the lower shell are both made of hard insulating materials.

Furthermore, a first operating handle extending outwards is arranged on the upper shell on one side of the opening of the Rogowski coil, and a second operating handle extending outwards is arranged on the lower shell; the length of the first operating handle is greater than the length of the second operating handle.

Advantageous effects

The utility model has the advantages that: the Rogowski coil comprises a split upper shell and a split lower shell, the two sides of the two shells are connected in a hinged and clamping manner, an opening of the Rogowski coil is realized, and the problem that the Rogowski coil is inconvenient to disassemble and assemble when in use in a bolt connection manner in the prior art is solved. The method is simple and quick to operate, and is beneficial to improving the detection efficiency of the power supply line. In addition, the upper coil and the lower coil which are arranged in the shell are connected through the plug-in type conductive clamping joint, so that the electrical connection of the Rogowski coil is realized, and the connection reliability and the contact property of the Rogowski coil are further improved; and the plug-in type conductive clamping joint is convenient to disassemble and assemble, and the practicability of the Rogowski coil is greatly improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the present invention when the upper and lower housings are separated;

fig. 3 is a schematic bottom view of the upper housing of the present invention;

fig. 4 is a schematic top view of the lower housing according to the present invention.

Wherein: 1-upper shell, 2-lower shell, 3-upper lightning current detection coil, 4-upper line current detection coil, 5-lower lightning current detection coil, 6-lower line current detection coil, 7-baffle, 8-buckle, 9-first operating handle, 10-second operating handle, 11-epoxy resin, 12-operating hole, 13-male head and 14-female head.

Detailed Description

The present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention, but are intended to be covered by the appended claims in any way.

Referring to fig. 1 to 4, the open type rogowski coil of the present invention includes an upper case 1 and a lower case 2. Go up casing 1 and lower casing 2's one side articulated connection, go up casing 1 and lower casing 2's opposite side and pass through the buckle joint and be connected. The upper and lower casing of this embodiment passes through the mode that the buckle joint is connected, has avoided the problem of the dismouting of being not convenient for when using through bolted connection's mode among the prior art. The method is simple and quick to operate, and is beneficial to improving the detection efficiency of the power supply line.

Specifically, the buckle is equipped with separation blade 7 and is installed and be equipped with buckle 8 on the lateral wall of casing 2 under including installing on the lateral wall of last casing 1, and buckle 8 is connected with separation blade 7 joint, has realized that the joint of upper and lower casing is connected.

Preferably, the pinch plate 8 and the baffle 7 are both positioned in the middle of a circular ring enclosed by the two shells. The clamping points of the two shells are arranged in the middle of the circular ring, so that the connecting points are close to the connecting positions of the upper detection coil and the lower detection coil, and the connecting stability of the upper detection coil and the lower detection coil is improved.

The upper shell 1 on the opening side of the Rogowski coil is provided with a first operating handle 9 extending outwards, and the lower shell 2 is provided with a second operating handle 10 extending outwards. The length of the first operating handle 9 is greater than the length of the second operating handle 10. When the Rogowski coil dismounting device is used, only the hand is needed to be placed below the protruding part of the first operating handle 9, then the first operating handle 9 is forcefully lifted, the upper shell and the lower shell can be separated, and the Rogowski coil dismounting convenience is greatly improved.

Preferably, the protruding portion of the first operating handle 9 relative to the second operating handle 10 is provided with an operating hole 12 that extends through the first operating handle 9. The operation hole 12 is a reserved hole, and may be a bolt thread hole or a through hole. When dismantling the rogowski coil, the testing personnel can install corresponding instrument in handle hole 12, directly promote can, further improved the convenience of dismantling the rogowski coil.

The upper shell 1 and the lower shell 2 of the embodiment are both made of hard insulating materials, so that rigid opening of the Rogowski coil is realized, and the problem that the Rogowski coil is easy to deform to cause inaccurate detection when the soft Rogowski coil is used for detection is avoided. The case may be made of PE plastic or ABS resin.

An upper coil assembly is installed in the inner cavity of the upper shell 1, a lower coil assembly is installed in the inner cavity of the lower shell 2, and the upper coil assembly is connected with the lower coil assembly in a clamping mode through a plug-in type conductive clamping connector.

During the use process of the Rogowski coil, the most important thing is to ensure that the upper detection coil and the lower detection coil are always in stable and reliable contact connection. However, the conventional rogowski coil adopts a direct-insert type connection, a bolt connection, a BNC connector connection and the like. These connection methods have the problem that the connection is not reliable or the connection is difficult to disassemble. To solve the problems existing in the connection of the upper coil and the lower coil in the prior art, the embodiment provides a connection mode of plug-in type clamping. The electric connection of coil pack about realizing through the electrically conductive joint of plug-in type, and connect reliably, the phenomenon that can not appear becoming flexible easily, drop, in addition easy dismounting has still promoted the efficiency of luo shi coil dismouting.

Specifically, the conductive card connector is a banana connector. The male head 13 of the banana joint is connected with the coil in the upper coil component, and the male head 13 of the banana joint protrudes out of the end face of the upper shell 1. The female head 14 of the banana connector is connected with the coil in the lower coil component, the end face of the female head 14 of the banana connector is flush with the end face of the lower shell 2, and the male head 13 of the banana connector is inserted into the female head 14 of the banana connector. Two upper and lower coils pass through the connection of banana joint, have not only realized the electrical connection between the coil of luo shi coil, and the connection of banana joint is reliable, the contact nature is good, the dismouting of being convenient for, in time also can not easy separation under the condition that buckle 8 became invalid, great improvement the practical reliability of luo shi coil.

The upper coil assembly of this embodiment includes upper lightning current detection coil 3 and upper line current detection coil 4, is equipped with an isolation clearance between upper lightning current detection coil 3 and the upper line current detection coil 4, and the both ends of upper lightning current detection coil 3 and the both ends of upper line current detection coil 4 all are connected with the public head 13 of a banana connector. The lower coil assembly comprises a lower lightning current detection coil 5 and a lower circuit current detection coil 6, an isolation gap is also arranged between the lower lightning current detection coil 5 and the lower circuit current detection coil 6, and the two ends of the lower lightning current detection coil 5 and the two ends of the lower circuit current detection coil 6 are both connected with a female head 14 of a banana connector. The upper lightning current detection coil 3 is connected with the lower lightning current detection coil 5, and the upper circuit current detection coil 4 is connected with the lower circuit current detection coil 6.

Namely, the housing of the rogowski coil of the present embodiment is provided with two coils therein. The lightning current detection coil is used for detecting the lightning current in the power supply line; the line current detection coil is used for detecting the line current in the power supply line, so that the lightning current and the line current in the power supply line can be detected simultaneously, and the detection convenience is improved. And the distance between the coils is ensured by the isolation gap between the two groups of detection coils, and the phenomenon of mutual electromagnetic interference is reduced, so that the two coils can independently and stably work, and the detection precision is favorably improved.

Preferably, the upper coil assembly further comprises an epoxy resin 11 cast in the upper shell 1 and wrapping the upper lightning current detection coil 3 and the upper line current detection coil 4. The lower coil assembly further comprises epoxy resin 11 poured into the lower case 2 and wrapping the lower lightning current detection coil 5 and the lower circuit current detection coil 6. The epoxy resin 11 is poured into the shell to fix and position the two detection coils, so that the phenomenon that the coils shake in the detection process is avoided, and the detection reliability and the result accuracy are improved. In addition, epoxy resin is poured into the inner cavities of the two shells, so that the rigidity of the shells is improved, and the Rogowski coil is conveniently sleeved on the periphery of a power supply line.

The lightning current detection coil of this embodiment includes a first coil bobbin body and a first copper wire wound on the first coil bobbin body. The line current detection coil comprises a tinned conductor, a second coil frame body and a second copper wire, the tinned conductor is installed in an inner cavity of the second coil frame body, and the second copper wire is wound on the second coil frame body. Wherein, first coil support body and second coil support body are luo shi coil skeleton.

The above is only the preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility model and the utility of the patent.

Claims

1. An open type Rogowski coil comprises an upper shell (1) and a lower shell (2), wherein the upper shell (1) is hinged with one side of the lower shell (2), and the open type Rogowski coil is characterized in that the upper shell (1) is connected with the other side of the lower shell (2) in a clamping manner through a buckle; the coil assembly is characterized in that an upper coil assembly is installed in the inner cavity of the upper shell (1), a lower coil assembly is installed in the inner cavity of the lower shell (2), and the upper coil assembly is connected with the lower coil assembly in a clamping mode through a plug-in type conductive clamping connector.

2. An open rogowski coil according to claim 1, wherein the conductive bayonet is a banana bayonet; the male head (13) of the banana connector is connected with a coil in the upper coil assembly, and the female head (14) of the banana connector is connected with a coil in the lower coil assembly.

3. An open type Rogowski coil according to claim 2, wherein the upper coil assembly comprises an upper lightning current detecting coil (3) and an upper line current detecting coil (4), an isolation gap is arranged between the upper lightning current detecting coil (3) and the upper line current detecting coil (4), and both ends of the upper lightning current detecting coil (3) and both ends of the upper line current detecting coil (4) are connected with a male head (13) of a banana joint;

lower coil assembly includes lower lightning current detection coil (5) and lower circuit current detection coil (6), also be equipped with an isolation clearance down between lightning current detection coil (5) and lower circuit current detection coil (6), the both ends of lower lightning current detection coil (5) and the both ends of lower circuit current detection coil (6) all are connected with female head (14) that a banana connects.

4. An open rogowski coil according to claim 3, characterised in that the upper coil assembly further comprises epoxy resin (11) cast inside the upper case (1), the upper lightning current detection coil (3) and the upper line current detection coil (4) being encased in epoxy resin (11);

the lower coil assembly further comprises epoxy resin (11) poured into the lower shell (2), and the lower lightning current detection coil (5) and the lower circuit current detection coil (6) are wrapped in the epoxy resin (11).

5. An open type Rogowski coil according to claim 1, wherein the buckle comprises a blocking sheet (7) mounted on the side wall of the upper shell (1) and a buckle plate (8) mounted on the side wall of the lower shell (2), and the buckle plate (8) is connected with the blocking sheet (7) in a clamping manner.

6. An open rogowski coil according to claim 5, characterised in that the pinch plate (8) and the stop plate (7) are both located in the middle of the circle enclosed by the two shells.

7. Open-ended rogowski coil according to claim 1, characterised in that the upper and lower shells (1, 2) are made of hard insulating material.

8. An open type Rogowski coil according to claim 1, wherein the upper casing (1) on the open side of the Rogowski coil is provided with a first operating handle (9) extending outwards, and the lower casing (2) is provided with a second operating handle (10) extending outwards; the length of the first operating handle (9) is greater than the length of the second operating handle (10).