CN110428953A - The electrical test convenient conversion equipment of the dry-type transformer Z-type mode of connection - Google Patents

Abstract

This disclosure proposes a convenient Z-type connection conversion device for dry-type transformers for electrical tests, including: an insulated connection wire and two conductive contacts with the same structure; the two ends of the insulated connection wire are respectively connected to conductive contacts; The conductive contact includes an outer insulating cover arranged in a coaxial structure from the outside to the inside, a magnetic sleeve, a supporting spring and a conductive copper core contact, which are sheathed into one; one end of the insulating connecting wire is introduced through a hole at the top of the outer insulating cover, And after passing through the support spring, it is welded and connected with the conductive copper core contact; the insulated connection wire and the outer insulation cover are connected by an insulated connection wire transition joint to play a protective role.

Description

Convenient conversion device for Z-type wiring mode of dry-type transformers for electrical tests

technical field

The disclosure relates to the technical field of electrical testing and detection of high-voltage power equipment, in particular to a convenient conversion device for a Z-type connection mode of a dry-type transformer for electrical testing.

Background technique

When high-voltage power equipment is leaving the factory, handing over, overhauling, etc., it is necessary to conduct electrical tests on the power equipment to judge whether the power equipment meets the requirements.

Transformer is one of the most commonly used electrical equipment, so there are many items for electrical tests on it. Among them, transformer DC resistance, transformation ratio and other items need to be measured at different tap points. Large-scale oil-filled transformers are usually equipped with on-load voltage regulating devices to realize quick switching of tap points. However, when dry-type transformers adopt Z-type wiring, the switching can only be realized through tedious multiple removal and installation of bolts, which greatly reduces work efficiency. .

Contents of the invention

The purpose of the implementation of this manual is to provide a convenient conversion device for the Z-type wiring mode of dry-type transformers for electrical tests, which can quickly switch the tap points of dry-type transformers according to the test situation, and effectively improve the efficiency of on-site work.

The implementation mode of this manual provides a convenient conversion device for the Z-type wiring mode of a dry-type transformer for electrical testing, which is realized through the following technical solutions:

Including: insulated connecting wire and two conductive contacts with the same structure;

Both ends of the insulated connecting wire are respectively connected with conductive contacts;

The conductive contact includes an outer insulating cover, a magnetic sleeve, a supporting spring and a conductive copper core contact arranged in a coaxial structure from the outside to the inside, and the sleeve is integrated; the magnetic sleeve absorbs the dry-type transformer tap point nut;

One end of the insulated connection wire is introduced from the top of the outer insulation cover through a hole, and is connected to the conductive copper core contact by welding after passing through the support spring;

The insulated connection wire and the outer insulation cover are connected by an insulated connection wire transition joint to play a protective role.

In a further technical solution, one side of the conductive copper core contact protrudes, and one side inside the magnetic sleeve is recessed, so that the conductive copper core contact can be limited after being embedded in the magnetic sleeve.

In a further technical solution, the cross-sectional area of the copper core of the insulated connecting wire is selected according to actual engineering, and meets the requirement of current conduction.

In a further technical solution, the material of the outer insulating covering is PVC, the material of the magnetic sleeve is a permanent magnet, and the middle part is hollowed out, the material of the supporting spring is a cylindrical helical compression spring, and the material of the conductive copper core contact is cylindrical Copper conductor, the transition joint of the insulated connecting wire is insulating rubber.

In a further technical solution, the insulated connection wire and the conductive copper core contact can carry corresponding current conduction requirements.

In a further technical solution, the magnetic sleeve is a hollow cylinder in the middle, and the hollow part is in the shape of a cylinder with different diameters.

In a further technical solution, the upper part of the magnetic sleeve has a large diameter, the lower part of the magnetic sleeve has a small diameter, and a support spring is placed in the hollow part with a large diameter in the upper part. The hollow part of the conductive copper core contact is placed.

In a further technical solution, the conductive copper core contact is a cylinder with different upper and lower diameters, the upper part has a large diameter, and the lower part has a small diameter and fits with the hollow part of the magnetic sleeve, so that the support spring is limited in a direction to the conductive copper core contact. At the same time, the conductive copper core contact will not be ejected by external force.

By dismantling the bolts once, and then absorbing the conductive contacts at both ends of the device to the nuts corresponding to the tap points, switching tap points are realized. Taking a Z-type connection dry-type transformer with 5 tap points as an example, make changes before using this device. The ratio and DC resistance tests need to dismantle and install 6 bolts, but only 1 bolt needs to be dismantled and installed after using this device, which effectively improves the efficiency of on-site work.

Compared with the prior art, the beneficial effects of the present disclosure are:

Aiming at the problem that the dry-type transformer using the Z-type wiring method needs to perform electrical tests, it can only be switched through tedious multiple disassembly and installation of bolts, and a dry-type transformer for electrical tests is designed for convenient switching of the Z-type wiring tap points. device.

Description of drawings

The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure, and the exemplary embodiments and descriptions of the present disclosure are used to explain the present disclosure, and do not constitute improper limitations to the present disclosure.

Figures 1-3 are three views of the conductive contacts of the Z-type wiring mode convenient conversion device for dry-type transformers used for electrical tests;

Fig. 4 is a schematic structural diagram of a magnetic sleeve in an embodiment of the present disclosure;

FIG. 5 is a structural schematic diagram of a magnetic sleeve, a support spring, and a conductive copper core contact in an embodiment of the present disclosure;

In the figure, 1. Insulated connection wire, 2. Conductive contact, 21. Outer insulation covering, 22. Magnetic sleeve, 23. Support spring, 24. Conductive copper core contact, 25. Insulated connection wire transition joint.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

Implementation example one

This embodiment discloses a dry-type transformer Z-type connection mode convenient conversion device for electrical tests, as shown in Figures 1-3, including an insulated connecting wire 1 and two conductive contacts 2 with the same structure; wherein the insulated connection The wire 1 and the two conductive contacts 2 with the same structure are of a coaxial structure. The arrangement of the above coaxial structure is to connect the core of the insulated connecting wire with the copper core of the conductive contact and conduct current. The conductive contact 2 is used as an end point and is connected as a whole by an insulated connecting wire 1, and the insulated connecting wire 1 is a YJV type copper core cross-linked vinyl cable conductor; wherein, the copper core cross-sectional area of the insulated connecting wire 1 is set according to actual engineering needs , the cross-sectional area is set to meet the requirements of current conduction.

In a specific implementation example, the conductive contact 2 includes an outer insulating cover 21, a magnetic sleeve 22, a support spring 23, a conductive copper core contact 24, and an insulated connecting wire transition joint 25; wherein, the outer insulating cover 21, the magnetic sleeve 22. The support spring 23, the conductive copper core contact 24, and the insulated connection line transition joint 25 are of coaxial structure, covered and integrated; wherein, the material of the outer insulating cover 21 is PVC, and the material of the magnetic sleeve 22 is a permanent magnet. The middle part is hollowed out, the material of the support spring 23 is a cylindrical helical compression spring, the material of the conductive copper core contact 24 is a cylindrical copper conductor, and the transition joint 25 of the insulated connection line is insulating rubber; wherein, one end of the insulated connection line 1 is insulated from the outside The top of the cover 21 is perforated and introduced, and after passing through the supporting spring 23, it is connected to the conductive copper core contact 24 by welding. 1 and the conductive copper core contact 24 can carry corresponding current conduction requirements.

Specifically, the outer insulation cover 21 is the outermost insulator of the conductive contact, and its purpose is to prevent people from touching and causing electric shock;

The function of the magnetic bushing 22 is to absorb the nut of the tap point of the dry-type transformer, and has a conductive effect;

The function of the support spring 23 is to give a force to the conductive copper core contact 24 to make the latter in the pop-up state;

The function of the conductive copper core contact 24 is to have good contact with the conductor at the bottom of the tap point nut to conduct current.

In a specific implementation example, there is a limited design between the magnetic sleeve 22 and the conductive copper core contact 24, the outer side of the conductive copper core contact 24 protrudes, and the inner side of the magnetic sleeve 22 is concave, so that the conductive copper core contact 24 After being embedded in the magnetic sleeve 22, it can be limited and will not fall off. Here the protrusion fits into the recess.

Referring to accompanying drawings 4 and 5, the magnetic sleeve 22 is a hollow cylinder in the middle, the upper part of the hollow part has a large diameter and the lower part has a small diameter, and the support spring 23 is placed in the hollow part with a large diameter in the upper part, and the normal state of the spring is a compressed state The conductive copper core contact 24 is placed in the hollow part with a small diameter in the lower part, but the conductive copper core contact 24 is a cylinder with a large diameter in the upper part and a small diameter in the lower part, which can just fit with the hollow part of the magnetic sleeve 22, and the purpose is to limit The spring does not eject the contact while having an outward force on the contact.

Before adopting the present invention, taking a Z-connection dry-type transformer with 5 tap points as an example, when conducting DC resistance and transformation ratio test tests, switching all 5 tap points requires dismantling and installing bolts 6 times, and the time used is about 20 minutes; after adopting the present invention, by removing the bolts once, and then adsorbing the conductive contacts at both ends of the device to the nuts corresponding to the tap points, switching tap points is realized, and the time used for switching all 5 tap points is about 6 minutes. Improve efficiency by about 70%.

It can be understood that, in the description of this specification, references to the terms "an embodiment", "another embodiment", "other embodiments", or "the first embodiment to the Nth embodiment" mean that A specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, and characteristics of materials may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims (8)

1. the electrical test convenient conversion equipment of the dry-type transformer Z-type mode of connection, characterized in that

It include: insulated feedthroughs and the identical conductive contact of two structures；

The both ends of the insulated feedthroughs are connected separately with conductive contact；

The conductive contact includes external insulation covering, magnetic sleeve pipe, support spring and the conduction of coaxial configuration arrangement from outside to inside Copper core contact, set cover integral；The magnetic sleeve pipe adsorbs dry-type transformer tapping point nut；

One end of the insulated feedthroughs is introduced from external insulation covering overp0unch, and is touched after passing through support spring with conduction copper core Head is weldingly connected；

It is played a protective role between the insulated feedthroughs and external insulation covering by the connection of insulated feedthroughs transit joint.

2. the electrical test as described in claim 1 convenient conversion equipment of the dry-type transformer Z-type mode of connection, characterized in that Conduction copper core contact side protrusion, magnetic sleeve pipe interior side recess, so that after conduction copper core contact insertion magnetic sleeve pipe It can limit.

3. the electrical test as described in claim 1 convenient conversion equipment of the dry-type transformer Z-type mode of connection, characterized in that The insulated feedthroughs copper core sectional area is selected according to Practical Project, meets the requirement of current lead-through.

4. the electrical test as described in claim 1 convenient conversion equipment of the dry-type transformer Z-type mode of connection, characterized in that The external insulation covering material is PVC, and the magnetic sleeve pipe material is permanent magnet, middle part hollow out, the support spring material For cylindrical type spiral compression spring, the conduction copper core contact material is cylindrical, copper conductor, and the insulated feedthroughs transition connects Head is electro-insulating rubber.

5. the electrical test as described in claim 1 convenient conversion equipment of the dry-type transformer Z-type mode of connection, characterized in that Corresponding current lead-through requirement is carried between the insulated feedthroughs and conduction copper core contact.

6. the electrical test as claimed in claim 2 convenient conversion equipment of the dry-type transformer Z-type mode of connection, characterized in that The magnetic sleeve pipe is the cylindrical body of an intermediate hollow, wherein hollow part is not equal cylindric of diameter.

7. the electrical test as claimed in claim 6 convenient conversion equipment of the dry-type transformer Z-type mode of connection, characterized in that The magnetic sleeve pipe upper diameter is big, and the magnetic sleeve pipe lower diameter is small, and the big hollow space of upper diameter places support bullet Spring, the normality of spring are compressive states, and the small hollow space of lower diameter and the big hollow space of upper diameter place conductive copper Core contact.

8. the electrical test as claimed in claim 7 convenient conversion equipment of the dry-type transformer Z-type mode of connection, characterized in that The conduction copper core contact is the cylindrical body that upper and lower diameter does not wait, and upper diameter is big, and lower diameter is small hollow with magnetic sleeve pipe Part is agreed with, and limitation support spring is unlikely to conduction copper core contact while having an outside power to conduction copper core contact Pop-up.