CN216979168U

CN216979168U - High-frequency current sensor for partial discharge detection

Info

Publication number: CN216979168U
Application number: CN202220356061.1U
Authority: CN
Inventors: 王杰; 郝春霞; 宋通; 常雪; 陈志刚
Original assignee: BAODING TIANWEI XINYU TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: BAODING TIANWEI XINYU TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-07-15
Anticipated expiration: 2032-02-22

Abstract

The utility model discloses a high-frequency current sensor for partial discharge detection, which comprises: the shielding shell, the output radio frequency head, the lock catch and the lock catch hook; the lower surface of shielding shell provides stable mounted position for hasp and hasp hook, sets up hasp and hasp hook in shielding shell's below, and current sensor installs on the ground wire, firmly fixes through hasp and hasp hook behind left casing and the concatenation of right casing, has improved open type current sensor's stability greatly, and butt joint department is difficult not hard up, simple to operate, and easily maintenance has good application prospect and application scope.

Description

High-frequency current sensor for partial discharge detection

Technical Field

The utility model relates to the technical field of electrical equipment sensors, in particular to a high-frequency current sensor for partial discharge detection.

Background

When partial discharge occurs to high-voltage electrical equipment in the power system, the high-voltage electrical equipment is coupled to the grounding side and enters the ground through the grounding wire, and meanwhile, a corresponding high-frequency pulse signal is generated on the grounding wire of the electrical equipment. The high-frequency current sensor is clamped on the grounding wire to obtain a pulse signal of the electrical equipment, and the partial discharge parameters of the equipment can be obtained by processing the obtained signal. The high-frequency current sensor has an open structure and a closed structure, and the normal operation of the ground wire cannot be damaged when the sensor is installed, so that the open type high-frequency current sensor is more widely applied. The existing open type sensor is easy to loosen at the butt joint part and has certain influence on the sensitivity of the sensor.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art.

To this end, an object of the present invention is to propose a high-frequency current sensor for partial discharge detection, comprising:

the shielding shell is provided with a left shell and a right shell, the left shell and the right shell are hinged with the rotating shaft, the left shell and the right shell can be tightly spliced, and a circular through channel is formed after splicing;

the output radio frequency head is arranged in the shielding shell, and the output end of the output radio frequency head extends out of the shielding shell;

the high-frequency magnetic core is fixedly arranged in the shielding shell, a winding is arranged in the middle of the high-frequency magnetic core, and the output end of the winding is electrically connected with the output radio frequency head;

the insulating layer is formed by injecting resin and glue into the shielding shell, the high-frequency magnetic core can be fixed by the insulating layer, and the insulating layer is positioned between the high-frequency magnetic core and the shielding shell;

the left shell and the right shell are provided with flat lower surfaces, and the lock catch is arranged on the lower surface of the left shell;

the lock clasp is arranged on the lower surface of the right shell, the lock catch and the lock catch hook are arranged adjacently, and when the left shell is spliced with the right shell, the lock clasp can be clamped with the lock catch.

The utility model has the beneficial effects that:

the lower surface of shielding shell provides stable mounted position for hasp and hasp hook, sets up hasp and hasp hook in shielding shell's below, and current sensor installs on the ground wire, firmly fixes through hasp and hasp hook behind left casing and the concatenation of right casing, has improved open type current sensor's stability greatly, and butt joint department is difficult not hard up, simple to operate, and easily maintenance has good application prospect and application scope.

The effect of insulating layer is fixed high frequency magnetic core and insulating part, and shielding shell, high frequency magnetic core, winding and insulating part form closed integral type structure after the encapsulating, can effectively shield external interference signal, improve the interference immunity of sensor and the accuracy that data detected.

Furthermore, the overvoltage protection device further comprises an overvoltage protection module, and the overvoltage protection module is fixedly arranged in the left shell or the right shell.

In order to avoid damage to the sensor caused by overlarge voltage, the overvoltage protection module is arranged in the shielding shell, so that the current sensor is effectively protected, and the service life of the current sensor is prolonged.

Preferably, the detection frequency band of the high-frequency core is 3MHz to 100 MHz.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure;

fig. 2 is a view showing an internal structure of a shield case;

FIG. 3 is a side view;

the device comprises a shielding shell, a left shell, a right shell, a penetrating channel, a rotating shaft, an output radio frequency head, a high-frequency magnetic core, a lock catch, a locking clasp, a 7-overvoltage protection module and an insulating layer, wherein the shielding shell is 1 part, the left shell is 101 part, the right shell is 102 part, the penetrating channel is 103 part, the high-frequency magnetic core is 2 part, the lock catch is 5 part, the locking clasp is 6 part, the overvoltage protection module is 7 part, and the insulating layer is 8 part.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 3, an embodiment of the present invention discloses a high frequency current sensor for partial discharge detection, including: the shielding shell 1 is provided with a left shell 101 and a right shell 102, the left shell 101 and the right shell 102 are both hinged with the rotating shaft 2, the left shell 101 and the right shell 102 can be tightly spliced, and a circular through channel 103 is formed after splicing; the output radio frequency head 3 is arranged in the shielding shell 1, and the output end of the output radio frequency head 3 extends out of the shielding shell 1; the high-frequency magnetic core 4 is fixedly arranged in the shielding shell 1, a winding is arranged in the middle of the high-frequency magnetic core 4, and the output end of the winding is electrically connected with the output radio frequency head 3; the high-frequency magnetic core is characterized by comprising an insulating layer 8, wherein resin glue is injected into the shielding shell 1 to form the insulating layer 8, the insulating layer 8 can fix the high-frequency magnetic core 4, and the insulating layer 8 is positioned between the high-frequency magnetic core 4 and the shielding shell 1; the lock catch 5 is provided with a flat lower surface on each of the left shell 101 and the right shell 102, and the lock catch 5 is arranged on the lower surface of the left shell 101; the lock clasp 6, the lock clasp 6 sets up on the lower surface of right casing 102, hasp 5 with the adjacent setting of lock clasp 6, when left casing 101 with when the concatenation of right casing 102, lock clasp 6 can with hasp 5 joint.

In this embodiment, the overvoltage protection device further includes an overvoltage protection module 7, and the overvoltage protection module 7 is fixedly disposed in the left casing 101 or the right casing 102.

In some embodiments, the detection frequency band of the high-frequency core 4 is 3MHz to 100 MHz.

In the present embodiment, the lock catches 5 and the lock catch hooks 6 are fixed to the lower surfaces of the left and

right housings

101 and 102, respectively, by screws.

In some embodiments, the output rf head 3 may adopt a "concave" or "convex" design, as shown in fig. 1, the position of the shielding shell 1 corresponding to the output rf head 3 is concave inwards to form a cavity, and the output rf head 3 extends into the cavity; it is also possible to use a convex design, as in fig. 2, extending beyond the outer side of the shielding shell.

In this embodiment, the pivot shaft 2 is disposed at the central axis and near the top of the shielding housing 1, the pivot shaft 2 is located at the upper side, and the latch 5 and the latch hook 6 are located at the lower side, which makes the structure more reasonable.

In this embodiment, the shielding case is made of aluminum alloy, the overvoltage protection module is composed of a gas discharge tube, and the middle winding of the high-frequency magnetic core is connected with the output rf head through a coaxial cable.

The utility model provides a high-frequency current sensor for partial discharge detection, wherein a lock catch and a lock catch hook are arranged below a shielding shell, the current sensor is arranged on a ground wire, and a left shell and a right shell are firmly fixed through the lock catch and the lock catch hook after being spliced, so that the stability of the open type current sensor is greatly improved, the butt joint part is not easy to loosen, the installation is convenient, and the maintenance is easy; meanwhile, the shielding shell, the high-frequency magnetic core, the winding and the insulating part form a closed integrated structure, so that external interference signals can be effectively shielded, the anti-interference performance of the sensor is improved, and the accuracy of data detection is improved, so that the sensor has a good application prospect and a good application range.

In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A high frequency current sensor for partial discharge detection, comprising:

the high-frequency magnetic core is arranged in the shielding shell, a winding is arranged in the middle of the high-frequency magnetic core, and the output end of the winding is electrically connected with the output radio frequency head;

2. The high-frequency current sensor for partial discharge detection according to claim 1, further comprising an overvoltage protection module, wherein the overvoltage protection module is fixedly disposed in the left housing or the right housing.

3. The high-frequency current sensor for partial discharge detection according to claim 1, wherein a detection frequency band of said high-frequency core is 3MHz to 100 MHz.