CN110211783B

CN110211783B - Test transformer

Info

Publication number: CN110211783B
Application number: CN201910532611.3A
Authority: CN
Inventors: 张一鸣
Original assignee: Jiangsu Kerui Electric Co ltd
Current assignee: Jiangsu Kerui Electric Co ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2021-10-22
Anticipated expiration: 2039-06-19
Also published as: CN110211783A

Abstract

The invention discloses a test transformer which comprises a transformer body, wherein a wiring terminal is arranged at the top of the transformer body, an outlet terminal board is arranged at the bottom of the front surface of the transformer body, and an outlet terminal sleeve body is arranged on the outer side of an outlet terminal of the outlet terminal board. The test transformer is characterized in that a steel ring, an insulating sleeve, an HDPE (high-density polyethylene) sleeve and a glass steel sleeve are additionally arranged on a sleeve body, a sealing cavity is formed, an iron core in a wiring terminal is substantially protected, when a ceramic outer sleeve body on the outer side is accidentally worn, the glass steel sleeve cannot be broken along with the ceramic outer sleeve body, the protection effect is enhanced, the corrosion resistance and the ageing resistance of the wiring terminal are enhanced, meanwhile, the continuous work is not influenced, the sealing cavity is designed, so that the shattering force of the ceramic outer sleeve body on the outer side cannot be transmitted to the glass steel sleeve body when the ceramic outer sleeve body is impacted, the sealing cavity is further designed to have the damp-proof and flame-retardant effects, and the steel ring and the wrapped insulating sleeve have certain mechanical strength and rigidity.

Description

Test transformer

Technical Field

The invention relates to the technical field of transformers, in particular to a test transformer.

Background

The voltage test transformer is a necessary test device for transformer tests, and has the following functions in the property tests of no-load, load and the like of the transformer: and raising the power supply voltage to the rated voltage required by the tested transformer to meet the requirement of the test standard.

The power frequency test transformer is mainly used for testing the insulation level of various insulation materials, insulation structures, electrical products and the like which can bear power frequency voltage, if the power frequency test transformer is used alone to perform the insulation test of the tested transformer, the power frequency test transformer can output very high voltage and sometimes exceed rated voltage at the moment that the output voltage is not increased when the generator is switched on and power is transmitted, and the test procedure is not allowed.

With the continuous upgrading and expansion of power systems, the failure rate of various power equipment is higher and higher, and in order to improve the reliability of various high-voltage electrical equipment in the operation process, it is an indispensable work to perform insulation strength tests on various high-voltage electrical equipment, electrical components and insulating materials. The high-voltage test transformer is used as a test device for detecting the insulation performance of various high-voltage electrical equipment, is used for detecting insulation defects in various components and measuring overvoltage capacity of the components, and is widely applied to power systems, industrial and mining enterprises and scientific research departments at present.

In the prior art, the cable has the defects of low strength, frangibility and easy corrosion of a sleeve body, the wiring board part has poor protection effect on the connecting part, the terminal is easy to corrode, damp and inflammable, and the existing protection measures are not easy to introduce the cable and influence field assembly.

Disclosure of Invention

The present invention is directed to a test transformer to solve the above problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a test transformer comprises a transformer body, wherein a wiring terminal is arranged at the top of the transformer body, and an outlet terminal board is arranged at the bottom of the front surface of the transformer body;

binding post includes a pottery overcoat body, the inside wall laminating of pottery overcoat body is provided with the HDPE sleeve pipe, the inboard of pottery overcoat body is provided with glass steel sleeve pipe, the sealed lock in top of pottery overcoat body and glass steel sleeve pipe has the closing cap board, form sealed chamber between pottery overcoat body and the glass steel sleeve pipe.

Preferably, the outer side wall of the ceramic outer sleeve body is provided with an annular wing plate, the bottom of the annular wing plate is provided with a steel ring sleeved on the ceramic outer sleeve body, and the outer side wall of the steel ring is tightly wrapped with an insulating sleeve.

Preferably, the insulating sleeve is an acetal enameled wire.

Preferably, a wire outgoing terminal sleeve body is arranged on the outer side of a wire outgoing terminal of the wire outgoing terminal board, the wire outgoing terminal sleeve body comprises a lower sleeve body fixedly connected with the wire outgoing terminal board, an upper sleeve body is sleeved on the top of the lower sleeve body, the bottom end of the upper sleeve body is connected with the lower sleeve body through a compression spring, a cover plate is hinged to the top of an inner cavity of the upper sleeve body, and a torsion spring is arranged on the bottom surface of the cover plate close to the hinged portion.

Preferably, a placing groove for accommodating the cover plate is formed in the top of the inner side wall of the upper sleeve body.

Preferably, the bottom surface inside wall of apron and the inside wall top of standing groove have been seted up and have been held the chamber, torsion spring places in after bending and holds the intracavity.

Preferably, the inner side of the bottom of the upper sleeve body is provided with a clamping plate B, the outer side wall of the top of the lower sleeve body is provided with a clamping plate A, and the clamping plate A and the clamping plate B are mutually abutted.

Preferably, the edge of the top of the inner side wall of the upper sleeve body is provided with a clamping edge plate, and the cover plate abuts against the bottom of the clamping edge plate.

Preferably, the number of the cover plates is at least 2.

Preferably, a sealing gasket is arranged between two adjacent cover plates.

Compared with the prior art, the invention has the beneficial effects that:

the utility model provides a, test transformer, through add on the cover body and establish the steel ring, the insulating boot, the HDPE sleeve pipe, glass steel sleeve pipe, and form the seal chamber, carry out substantively protection to the iron core in the binding post, when the pottery overcoat body in the outside is wearing and tearing by accident, owing to have the design of seal chamber, glass steel sleeve pipe can not follow together breakage, strengthen the protection effect, strengthen binding post's corrosion-resistant ageing resistance, do not influence continuation work simultaneously, the design of seal chamber makes the shatter force of the pottery overcoat body in the outside can not transmit to glass steel sleeve pipe when receiving the striking, and the design of seal chamber still has dampproofing and fire-retardant effect, steel ring and the insulating boot of parcel make it have certain mechanical strength and rigidity.

The upper sleeve body, the lower sleeve body and the cover plate form a protective body outside the wire outlet terminal to protect the wire outlet terminal, the cover plate is buckled to close the sleeve body after the cable is pulled out, wiring is convenient and reliable, the terminal is anti-corrosion, damp-proof and flame-retardant, and the terminal box is convenient for cable introduction and has enough space.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a terminal according to the present invention;

fig. 3 is a schematic structural view of the outlet terminal sleeve of the present invention.

In the figure: 1. the cable connector comprises a connector body, 2, a wiring terminal, 201, a cover plate, 202, a sealing cavity, 203, a ceramic outer sleeve body, 204, a steel ring, 205, an insulating sleeve, 206, a HDPE sleeve, 207, a glass steel sleeve, 3, a wire outlet terminal plate, 4, a wire outlet terminal sleeve body, 401, an upper sleeve body, 402, a cover plate, 403, a clamping edge plate, 404, a torsion spring, 405, an accommodating cavity, 406, a placing groove, 407, clamping plates A and 408, clamping plates B and 409, a lower sleeve body, 410 and a compression spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that:

referring to fig. 1, a test transformer comprises a transformer body 1, wherein a wiring terminal 2 is arranged at the top of the transformer body 1, and a wire outlet terminal board 3 is arranged at the bottom of the front surface of the transformer body 1;

referring to fig. 2, the connection terminal 2 includes a ceramic outer sleeve 203, an HDPE sleeve 206 is attached to an inner sidewall of the ceramic outer sleeve 203, the HDPE sleeve 206 is adhered to the ceramic outer sleeve 203, the HDPE sleeve 206 enhances corrosion resistance and aging resistance of the connection terminal 2, a glass fiber reinforced plastic sleeve 207 is disposed inside the ceramic outer sleeve 203, the glass fiber reinforced plastic sleeve 207 substantially protects an iron core inside the connection terminal 2, when the ceramic outer sleeve 203 outside is accidentally worn, the glass fiber reinforced plastic sleeve 207 cannot be broken along with the ceramic outer sleeve, the protection effect is enhanced, and the continuous operation is not affected, a cover plate 201 is sealingly fastened on top portions of the ceramic outer sleeve 203 and the glass fiber reinforced plastic sleeve 207, a sealing cavity 202 is formed between the ceramic outer sleeve 203 and the glass fiber reinforced plastic sleeve 207, and the crack force of the ceramic outer sleeve 203 outside cannot be transmitted to the glass fiber reinforced plastic sleeve 207 when being impacted by the design of the sealing cavity 202, the design of the sealed cavity 202 also has the effects of moisture resistance and flame retardance, the outer side wall of the ceramic outer casing 203 is provided with an annular wing plate, the bottom of the annular wing plate is provided with a steel ring 204 sleeved on the ceramic outer casing 203, the outer side wall of the steel ring 204 is tightly wrapped with an insulating sleeve 205, the insulating sleeve 205 is an acetal enameled wire, and the steel ring 204 and the wrapped insulating sleeve 205 are designed to have certain mechanical strength and rigidity;

referring to fig. 3, an outlet terminal sleeve 4 is disposed outside an outlet terminal of an outlet terminal board 3, the outlet terminal is protected by disposing a sleeve outside the outlet terminal, the outlet terminal sleeve 4 includes a lower sleeve 409 fixedly connected to the outlet terminal board 3, an upper sleeve 401 is sleeved on a top of the lower sleeve 409, a bottom end of the upper sleeve 401 is connected to the lower sleeve 409 through a compression spring 410, a certain space is provided in the sleeve by the design of the upper sleeve 401 and the lower sleeve 409, so that a plug can be conveniently inserted, a cover plate 402 is hinged to a top of an inner cavity of the upper sleeve 401, a torsion spring 404 is disposed on a bottom surface of the cover plate 402 close to the hinge portion, and in a normal state, the cover plate 402 seals the outlet terminal sleeve 4 by a tension of the torsion spring 404, so that a relatively closed space is formed in the sleeve, the outlet terminal is protected, and when the outlet terminal is plugged, the plug pushes the cover plates 402 to move downwards to push the upper sleeve body 401 to move downwards so that the plug is inserted into the outlet terminal, the number of the cover plates 402 is 2, a sealing gasket is arranged between every two adjacent cover plates 402, a placing groove 406 for containing the cover plates 402 is arranged at the top of the inner side wall of the upper sleeve body 401, a containing cavity 405 is formed in the inner side wall of the bottom surface of each cover plate 402 and the top of the inner side wall of the placing groove 406, the torsion spring 404 is arranged in the containing cavity 405 after being bent, the design of the containing cavity 405 is adopted, the pressing torsion spring 404 is positioned in the containing cavity 405 when the cover plates 402 move downwards, the downward buckling of the cover plates 402 is not influenced, a clamping plate B408 is arranged on the inner side of the bottom of the upper sleeve body 401, a clamping plate A407 is arranged on the outer side wall of the top of the lower sleeve body 409, the clamping plate A407 and the clamping plate B408 are mutually abutted, the vertical movement distance of the upper sleeve body 401 is limited by the design of the clamping plate A407 and the clamping plate B408, and the top edge of the inner side wall of the top edge of the upper sleeve body 401 is provided with a clamping plate 403, the cover plate 402 abuts against the bottom of the card edge plate 403, and through the design of the card edge plate 403, the cover plate 402 abuts against the card edge plate 403 when being reset upwards, so as to limit the position of the cover plate 402, and the cover plate 402 is sealed at the top of the upper sleeve body 401.

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 test transformer, includes ware body (1), ware body (1) top is provided with binding post (2), ware body (1) openly bottom is provided with outlet terminal board (3), its characterized in that:

the wiring terminal (2) comprises a ceramic outer sleeve (203), an HDPE sleeve (206) is attached to the inner side wall of the ceramic outer sleeve (203), a glass steel sleeve (207) is arranged on the inner side of the ceramic outer sleeve (203), a sealing cover plate (201) is hermetically buckled on the top of the ceramic outer sleeve (203) and the top of the glass steel sleeve (207), and a sealing cavity (202) is formed between the ceramic outer sleeve (203) and the glass steel sleeve (207);

an annular wing plate is arranged on the outer side wall of the ceramic outer sleeve body (203), a steel ring (204) sleeved on the ceramic outer sleeve body (203) is arranged at the bottom of the annular wing plate, and an insulating sleeve (205) is tightly wrapped on the outer side wall of the steel ring (204);

the wire outgoing terminal sleeve is characterized in that a wire outgoing terminal sleeve body (4) is arranged on the outer side of a wire outgoing terminal of the wire outgoing terminal board (3), the wire outgoing terminal sleeve body (4) comprises a lower sleeve body (409) fixedly connected with the wire outgoing terminal board (3), an upper sleeve body (401) is sleeved on the top of the lower sleeve body (409), the bottom end of the upper sleeve body (401) is connected with the lower sleeve body (409) through a compression spring (410), a cover plate (402) is hinged to the top of an inner cavity of the upper sleeve body (401), and a torsion spring (404) is arranged on the bottom surface of the cover plate (402) close to the hinged portion.

2. A test transformer according to claim 1, characterized in that: the insulating sleeve (205) is an acetal enameled wire.

3. A test transformer according to claim 1, characterized in that: the top of the inner side wall of the upper sleeve body (401) is provided with a placing groove (406) for accommodating the cover plate (402).

4. A test transformer according to claim 1, characterized in that: an accommodating cavity (405) is formed in the top of the inner side wall of the bottom surface of the cover plate (402) and the top of the inner side wall of the placing groove (406), and the torsion spring (404) is bent and then placed in the accommodating cavity (405).

5. A test transformer according to claim 1, characterized in that: the inner side of the bottom of the upper sleeve body (401) is provided with a clamping plate B (408), the outer side wall of the top of the lower sleeve body (409) is provided with a clamping plate A (407), and the clamping plate A (407) and the clamping plate B (408) are mutually abutted.

6. A test transformer according to claim 1, characterized in that: the edge of the top of the inner side wall of the upper sleeve body (401) is provided with a clamping edge plate (403), and the cover plate (402) is abutted to the bottom of the clamping edge plate (403).

7. A test transformer according to claim 1, characterized in that: the number of the cover plates (402) is at least 2.

8. A test transformer according to claim 1, characterized in that: a sealing gasket is arranged between two adjacent cover plates (402).