CN212907309U

CN212907309U - Middle-high voltage zero sequence current transformer

Info

Publication number: CN212907309U
Application number: CN202022085186.9U
Authority: CN
Inventors: 孙式桥; 吕红宇; 段君琳; 赵尚业; 石长现; 栾胜平; 李树刚
Original assignee: Qingdao Yuantailin Power Engineering Co ltd
Current assignee: Qingdao Yuantailin Power Engineering Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-04-06
Anticipated expiration: 2030-09-21

Abstract

The utility model discloses a middle and high voltage zero sequence current transformer, including bottom plate and montant, bottom plate upper end axle center department is provided with the montant, the bottom plate is fixed with the montant hot melt, montant front end left side is provided with first terminal, the right side of first terminal is provided with the second terminal, the upper end of montant is provided with the mutual-inductor main part, the utility model discloses in through the mode change that is traditional adoption thread groove fixed electric wire for current mode through grafting post and stand centre gripping, when carrying out the connection of electric wire, can be through the mutual extrusion of grafting post and stand down for the electric wire is fixed inseparable, has avoided traditional phenomenon because the thread groove wearing and tearing lead to the electric wire to appear droing when measuring.

Description

Middle-high voltage zero sequence current transformer

Technical Field

The utility model belongs to the technical field of current transformer is relevant, concretely relates to middle and high voltage zero sequence current transformer.

Background

The current transformer principle is based on the electromagnetic induction principle. The current transformer is composed of a closed iron core and a winding. The primary side winding of the current transformer has few turns and is connected in series in a circuit of current to be measured, so that all current of the circuit always flows through the current transformer, the secondary side winding has more turns and is connected in series in a measuring instrument and a protection circuit, and when the current transformer works, the secondary side circuit of the current transformer is always closed, so that the impedance of the series coil of the measuring instrument and the protection circuit is very small, and the working state of the current transformer is close to short circuit. The current transformer converts a large current on the primary side into a small current on the secondary side for use, and the secondary side cannot be opened.

The prior middle-high voltage zero sequence current transformer technology has the following problems: most of the existing middle-high voltage zero sequence current transformers are fixed by bolts when the wires are connected, so that the phenomenon of untight fixation of the threads due to thread abrasion can be caused when the wires are unscrewed for a long time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a well high voltage zero sequence current transformer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a well high-voltage zero sequence current transformer, includes bottom plate and montant, bottom plate upper end axle center department is provided with the montant, the bottom plate is fixed with the montant hot melt, montant front end left side is provided with first terminal, the right side of first terminal is provided with the second terminal, the upper end of montant is provided with the mutual-inductor main part, the upper end axle center department of mutual-inductor main part is provided with the data plate, the constitution of first terminal is including the grafting post, hold handle, stand and reference column, the bottom axle center department of holding the handle is provided with the grafting post, the bottom of grafting post is provided with the stand, both ends respectively are provided with a reference column about the stand, first terminal passes through reference column and mutual-inductor main part fixed connection.

Preferably, the mutual inductor comprises a shell, an inner ring, a turn line and a connecting line, the inner ring is arranged inside the shell, the turn line is wound around the outer circumference of the inner ring, the left side and the right side of the bottom end of the turn line are respectively provided with the connecting line, and the mutual inductor is fixedly connected with the first binding post through the connecting line.

Preferably, the bottom plate is a flat plate-shaped structure, and the left end and the right end of the inside of the bottom plate are respectively provided with an oval connecting hole.

Preferably, the mutual inductor main body is of an annular structure with a hollow inner part, and the left end and the right end of the inner axis of the mutual inductor main body are respectively provided with a groove.

Preferably, the upright column is of a hollow cylindrical structure, and the diameter of the section of the inside of the upright column is larger than that of the section of the plug column.

Preferably, the number of the connecting lines is two, and the two connecting lines are respectively fixedly connected with the turn lines.

Compared with the prior art, the utility model provides a well high-voltage zero sequence current transformer possesses following beneficial effect:

(1) the utility model changes the traditional mode of fixing the electric wire by adopting the thread groove into the traditional mode of clamping the electric wire by the inserting column and the upright post, so that the electric wire can be tightly fixed by the mutual extrusion of the inserting column and the upright post when the electric wire is connected, and the traditional phenomenon that the electric wire falls off when in measurement due to the abrasion of the thread groove is avoided;

(2) the utility model discloses in be provided with two reference columns through the both ends at the stand, avoided taking the handle like this and appeared the phenomenon that drops, the inside of stand is provided with a cross-sectional diameter and is greater than the hole of grafting post moreover, and the bottom of hole is fixed with the inside connecting wire of mutual-inductor main part, can make electric wire and connecting wire contact each other under the grafting of grafting post like this to reach the measuring purpose.

Drawings

Fig. 1 is a schematic view of a front view structure of a middle-high voltage zero sequence current transformer of the present invention;

fig. 2 is a schematic front view of the first terminal of the present invention;

FIG. 3 is a schematic cross-sectional view of the main body of the transformer of the present invention;

in the figure: 1. a first terminal post; 11. inserting the column; 12. holding the handle; 13. a column; 14. a positioning column; 2. a second terminal; 3. a base plate; 4. a vertical rod; 5. a transformer body; 51. a housing; 52. an inner ring; 53. winding; 54. a connecting wire; 6. a nameplate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-3, the present invention provides a technical solution: a middle-high voltage zero sequence current transformer comprises a bottom plate 3 and vertical rods 4, wherein the bottom plate 3 is of a flat plate-shaped structure, the bottom plate 3 is arranged to achieve a better fixing effect, the left end and the right end inside the bottom plate 3 are respectively provided with an oval connecting hole, the vertical rod 4 is arranged at the axis of the upper end of the bottom plate 3, the bottom plate 3 and the vertical rod 4 are fixed in a hot melting mode, the left side of the front end of the vertical rod 4 is provided with a first wiring terminal 1, the right side of the first wiring terminal 1 is provided with a second wiring terminal 2, the upper end of the vertical rod 4 is provided with a transformer main body 5, the transformer main body 5 comprises a shell 51, an inner ring 52, a turn line 53 and connecting lines 54, the inner ring 52 is arranged inside the shell 51, the turn line 53 is wound on the periphery of the outer side of the inner ring 52, the left side and the right side of the bottom end of the turn, the mutual inductor main body 5 can be fixedly connected with the first binding post 1 and the second binding post 2 through the connecting wire 54, the mutual inductor main body 5 is of an annular structure with a hollow inner part, so that a circuit to be detected can be wound more conveniently, the left end and the right end of the inner axle center of the mutual inductor main body 5 are respectively provided with a groove, the mutual inductor main body 5 is fixedly connected with the first binding post 1 through the connecting wire 54, the axle center of the upper end of the mutual inductor main body 5 is provided with a nameplate 6, the first binding post 1 comprises an inserting post 11, a holding handle 12, an upright post 13 and a positioning post 14, the axle center of the bottom end of the holding handle 12 is provided with the inserting post 11, the bottom end of the inserting post 11 is provided with the upright post 13, the upright post 13 is of a cylindrical structure with a hollow inner part, so that an electric wire can be fixed tightly under the action of the inserting post, the left end and the right end of the upright post 13 are respectively provided with a positioning column 14, and the first binding post 1 is fixedly connected with the mutual inductor main body 5 through the positioning columns 14.

The utility model discloses a theory of operation and use flow: when the device is used, the device is firstly taken out, then the device is fixed on one side of a line to be detected through the bottom plate 3 and is tightly fixed, then the line to be detected surrounds the inside of the transformer main body 5 for one circle, then a user takes out the ammeter, the positive pole and the negative pole of the ammeter are tightly fixed with the first binding post 1 and the second binding post 2 through the wires, so that the change of the current can be observed under the detection of the ammeter, when the wires are fixed with the first binding post 1 and the second binding post 2, the holding handle 12 is firstly pulled out, then the wires are inserted into the holes in the upright post 13, then the user presses down the holding handle 12, so that the wires placed in the upright post 13 can be tightly fixed through the pressing of the inserting post 11 under the action of the holding handle 12, so that the wires can be mutually contacted with the connecting wire 54 in the transformer main body 5, therefore, the mutual inductor and the ammeter can be tightly fixed, and the device is used.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a well high voltage zero sequence current transformer, includes bottom plate (3) and montant (4), its characterized in that: a vertical rod (4) is arranged at the axle center of the upper end of the bottom plate (3), the bottom plate (3) and the vertical rod (4) are fixed by hot melting, a first binding post (1) is arranged on the left side of the front end of the vertical rod (4), a second binding post (2) is arranged on the right side of the first binding post (1), a mutual inductor main body (5) is arranged at the upper end of the vertical rod (4), a nameplate (6) is arranged at the axis of the upper end of the mutual inductor main body (5), the first binding post (1) comprises an inserting post (11), a holding handle (12), a vertical post (13) and a positioning post (14), an inserting column (11) is arranged at the axis of the bottom end of the holding handle (12), the bottom end of the inserting column (11) is provided with an upright column (13), the left end and the right end of the upright column (13) are respectively provided with a positioning column (14), the first binding post (1) is fixedly connected with the mutual inductor main body (5) through a positioning column (14).

2. The medium-high voltage zero sequence current transformer according to claim 1, characterized in that: the mutual inductor comprises a mutual inductor main body (5) and is characterized in that the mutual inductor main body (5) comprises a shell (51), an inner ring (52), a turn line (53) and a connecting line (54), the inner ring (52) is arranged inside the shell (51), the turn line (53) is wound on the outer side of the inner ring (52) in a circle, the connecting line (54) is arranged on each of the left side and the right side of the bottom end of the turn line (53), and the mutual inductor main body (5) is fixedly connected with a first wiring terminal (1) through the connecting line (54).

3. The medium-high voltage zero sequence current transformer according to claim 1, characterized in that: the bottom plate (3) is of a flat plate-shaped structure, and the left end and the right end of the inside of the bottom plate (3) are respectively provided with an oval connecting hole.

4. The medium-high voltage zero sequence current transformer according to claim 1, characterized in that: the mutual inductor is characterized in that the mutual inductor main body (5) is of an annular structure with a hollow inner part, and the left end and the right end of the inner axis of the mutual inductor main body (5) are respectively provided with a groove.

5. The medium-high voltage zero sequence current transformer according to claim 1, characterized in that: the upright post (13) is of a hollow cylindrical structure, and the diameter of the section inside the upright post (13) is larger than that of the section of the insertion post (11).

6. The medium-high voltage zero sequence current transformer according to claim 2, characterized in that: the number of the connecting wires (54) is two, and the two connecting wires (54) are respectively and fixedly connected with the turn line (53).