CN219039126U - Short circuit wiring device for transformer test - Google Patents

Abstract

The utility model discloses a short circuit wiring device for transformer test, which comprises at least four jointing clamps, wherein each jointing clamp is connected in series through wires, a wire collector is arranged on the wires between the adjacent jointing clamps, each jointing clamp comprises two metal clamping rods which are connected in a rotating way in the middle, one ends of the two metal clamping rods are provided with wire clamping heads, the other ends of the two metal clamping rods are respectively sleeved with an insulating sleeve, an elastic piece which enables the wire clamping heads to close to the wire clamping heads is arranged between the two metal clamping rods, a wire fixing mechanism is arranged on each metal clamping rod, and the end parts of the wires are fixed on the wire fixing mechanism. The transformer test short-circuit wiring device is convenient to clamp and put, is convenient for short-circuit operation, is adjustable in length, and can improve test efficiency and safety.

Description

Short circuit wiring device for transformer test

Technical Field

The utility model relates to the technical field of short circuit test of transformers, in particular to a short circuit wiring device for a transformer test.

Background

Transformers are the most important equipment of a substation. In recent years, with the continuous expansion of the power grid scale, the development of a power system to high voltage, large capacity and the Internet and the improvement of the safety reliability index requirements of the power system are important to the conventional test of the transformer, so that the potential safety hazard can be eliminated in time, and the stable and efficient operation of the transformer is ensured. However, the transformer test item of 110 kv and above mostly involves a three-phase short circuit of a high voltage or low voltage terminal, when the high voltage is tested on medium voltage, low voltage and ground insulation resistance, the high voltage side three-phase winding and the neutral point short circuit are connected to the high voltage output end, the medium voltage side three-phase winding and the neutral point and the low voltage side three-phase winding are grounded in a short circuit mode, and the short circuit is performed by using a method of manually winding copper wires. Similarly, when high-voltage centering, low-voltage and ground dielectric loss and capacitance tests are carried out, the high-voltage side three-phase winding and the neutral point are connected into the high-voltage output end in a short circuit mode, and the middle-voltage side three-phase winding and the neutral point as well as the low-voltage side three-phase winding are grounded in a short circuit mode. When the short-circuit impedance test of the high-voltage medium-voltage winding is carried out, the medium-voltage side three-phase winding needs to be short-circuited. Adopt the copper wire line to twine the short circuit manually, it is fixed not firm, the dismouting is inconvenient, and length is not adjustable, wastes time and energy, seriously influences test efficiency, and the working risk is big, and fail safe nature is low.

And, when 220 kilovolt main transformer test, need the crane to cooperate, the test personnel need stay for a long time on the crane, and the working risk is high, and the potential safety hazard is bigger.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides the transformer test short-circuit wiring device which is convenient to clamp and put, convenient to short-circuit, adjustable in length and capable of improving test efficiency and safety.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a experimental short circuit termination of transformer, includes four at least binding clips, each the binding clip passes through the electric wire and establishes ties, is equipped with the spooler on the electric wire between the adjacent binding clip, the binding clip includes two middle parts rotation metal clamping bars of being connected, two the one end of metal clamping bars is equipped with the clamp end of a thread, the equal cover of the other end is equipped with insulating cover, two be equipped with between the metal clamping bars and make the clamp end draw close the elastic component of clamp line, be equipped with wire fixing mechanism on the metal clamping bars, the tip of electric wire is fixed on wire fixing mechanism.

As a further improvement of the above technical scheme:

the wire fixing mechanism comprises a fixed block and a movable block which are oppositely arranged, the fixed block is fixed on the metal clamping rod, the movable block is slidably arranged on the metal clamping rod and can be close to and far away from the fixed block relatively, and a clamping elastic piece is arranged between the movable block and the metal clamping rod.

The side of the metal clamping rod is provided with a chute, and the movable block is slidably arranged in the chute.

The movable block is provided with an operating handle.

The sliding chute is characterized in that a limiting hole is formed in the bottom wall of the sliding chute, a guide groove perpendicular to the sliding chute is formed in the position, corresponding to the limiting hole, of the movable block, a limiting block is arranged in the guide groove in a sliding mode, a socket part which can be inserted into the limiting hole is arranged on the limiting block, a limiting elastic piece is arranged between the limiting block and the movable block, and the operating handle is arranged on the limiting block.

The side wall of the chute is provided with an L-shaped through hole for an operation handle to pass through, and the operation handle passes through the L-shaped through hole and extends to the outside of the metal clamping rod.

The end face of the spigot-and-socket part, which faces the limiting hole, is provided with a rolling piece.

The clamping elastic piece and the limiting elastic piece are springs.

The winding machine comprises a round winding cover, a winding roll arranged in the round winding cover and a rotating mechanism used for enabling the winding roll to rotate, two threading openings which are arranged at intervals are formed in the periphery of the round winding cover, a threading passage penetrates through the winding roll along the radial direction, and the electric wires penetrate through the threading openings and the threading passage.

The rotating mechanism comprises a rotating handle, the rotating handle is arranged outside the circular wire collecting cover and is fixedly connected with the center of the winding roll, and a locking piece for locking the rotating handle and the circular wire collecting cover is arranged on the rotating handle.

Compared with the prior art, the utility model has the advantages that:

the short-circuit wiring device for the transformer test adopts the wiring clamp to clamp the three-phase winding, specifically, the insulating sleeve ends of the two metal clamping rods are held by hands, so that the two opposite wire clamping heads at the other ends of the two metal clamping rods can be opened, the holding force on the insulating sleeve ends of the two metal clamping rods is relieved, and the two opposite wire clamping heads at the other ends of the two metal clamping rods are closed under the elastic restoring force of the elastic piece. And a wire collector is arranged on the wire between the adjacent jointing clamps, so that the length of the wire between the adjacent jointing clamps can be conveniently adjusted. The transformer test short-circuit wiring device is convenient to clamp and put, is convenient for short-circuit operation, is adjustable in length, and can improve test efficiency and safety.

Drawings

Fig. 1 is a schematic diagram of a transformer test shorting connection device of the present utility model.

Fig. 2 is a schematic structural view of a jointing clamp of a transformer test shorting wiring device of the present utility model.

Fig. 3 is an enlarged view at a in fig. 2.

Fig. 4 is a schematic diagram of a partial structure of the transformer test shorting connection device of the present utility model when the socket is inserted into the limiting hole.

Fig. 5 is a schematic side sectional structure of a wire takeup of the transformer test shorting wiring device of the present utility model.

Fig. 6 is a schematic diagram of a front view structure of a wire takeup of the short-circuit wiring device for transformer test according to the present utility model.

The reference numerals in the drawings denote:

1. a jointing clamp; 11. a metal clamping rod; 111. a chute; 112. a limiting hole; 12. a wire clamping head; 13. an insulating sleeve; 2. an electric wire; 3. a wire winding device; 31. a circular wire-collecting cover; 311. a threading opening; 32. a winding roll; 321. a threading way; 33. a rotation mechanism; 331. rotating the handle; 332. a locking member; 4. a wire fixing mechanism; 41. a fixed block; 42. a movable block; 421. a guide groove; 422. a limiting block; 423. a socket; 43. clamping the elastic piece; 44. an operating handle; 45. a limit elastic member; 5. an L-shaped through opening; 6. a rolling member.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the specific examples.

As used in this disclosure and in the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Fig. 1 to 6 show an embodiment of a short circuit wiring device for a transformer test according to the present utility model, which comprises at least four jointing clamps 1, each jointing clamp 1 is connected in series through a wire 2, a wire collector 3 is arranged on the wire 2 between adjacent jointing clamps 1, the jointing clamps 1 comprise two metal clamping rods 11 with middle parts connected in a rotating manner, one ends of the two metal clamping rods 11 are provided with wire clamping heads 12, the other ends are respectively sleeved with an insulating sleeve 13, an elastic member for enabling the wire clamping heads 12 to close to the wire clamping is arranged between the two metal clamping rods 11, a wire fixing mechanism 4 is arranged on the metal clamping rods 11, and the end parts of the wires 2 are fixed on the wire fixing mechanism 4.

When in short-circuit operation, the three binding clips 1 are respectively clamped on the high-voltage side three-phase winding by adopting the short-circuit wiring device for the transformer test, and the fourth binding clip 1 is clamped on the high-voltage output end, so that the three-phase winding and the neutral point are connected into the high-voltage output end in a short-circuit manner, and the high-voltage side three-phase winding is connected into the high-voltage output end in a short-circuit manner; the transformer test short-circuit wiring device is adopted, three wiring clamps 1 are respectively clamped on the medium-voltage side three-phase winding, and the fourth wiring clamp 1 is grounded, so that the short-circuit grounding of the medium-voltage side three-phase winding is realized; by adopting the short-circuit wiring device for the transformer test, three wiring clamps 1 are respectively clamped on the low-voltage side three-phase winding, and the fourth wiring clamp 1 is grounded, so that the short-circuit grounding of the low-voltage side three-phase winding is realized.

The utility model relates to a short-circuit wiring device for a transformer test, which adopts a wiring clamp 1 to clamp a three-phase winding, in particular to a device which can open two opposite wire clamping heads 12 at the other ends of two metal clamping rods 11 by holding the insulating sleeve 13 ends of the two metal clamping rods 11 by hand, and then relieve the hand holding force of the insulating sleeve 13 ends of the two metal clamping rods 11, wherein the two opposite wire clamping heads 12 at the other ends of the two metal clamping rods 11 draw close a clamping wire set under the action of the elastic restoring force of an elastic piece. The wire winding device 3 is arranged on the wire 2 between the adjacent jointing clamps 1, so that the length of the wire 2 between the adjacent jointing clamps 1 can be conveniently adjusted. The transformer test short-circuit wiring device is convenient to clamp and put, is convenient for short-circuit operation, is adjustable in length, and can improve test efficiency and safety.

In this embodiment, as shown in fig. 2 to 4, the wire fixing mechanism 4 includes a fixed block 41 and a movable block 42 that are oppositely disposed, the fixed block 41 is fixed on the metal clamping rod 11, the movable block 42 is slidably disposed on the metal clamping rod 11 and can approach and separate from the fixed block 41, and a clamping elastic member 43 is disposed between the movable block 42 and the metal clamping rod 11. When in wire connection, the movable block 42 is pulled away from the fixed block 41 by a proper distance, the clamping elastic piece 43 is pressed and compressed, then the end of the electric wire 2 is inserted between the fixed block 41 and the movable block 42, then the external force to the movable block 42 is relieved, and the movable block 42 enables the movable block 42 to be close to the fixed block 41 under the action of elastic restoring force of the clamping elastic piece 43 so as to clamp the end of the electric wire 2. When the electric wire 2 is detached, the movable block 42 is pulled out to be away from the fixed block 41 by a proper distance. Simple structure and convenient disassembly and assembly.

In this embodiment, a sliding groove 111 is formed on a side surface of the metal clamping bar 11, and the movable block 42 is slidably disposed in the sliding groove 111. The movable block 42 slides along the chute 111, and the sliding is stable. The cross section of the chute 111 may be provided in a T-shape or a dovetail shape, and the portion of the movable block 42 slidably provided in the chute 111 is adapted to the shape of the chute 111.

In this embodiment, the movable block 42 is provided with an operation handle 44. Facilitating the pulling of the movable block 42.

In this embodiment, as shown in fig. 3 and 4, a limiting hole 112 is provided on the bottom wall of the sliding chute 111, a guiding slot 421 perpendicular to the sliding chute 111 is provided at a position of the movable block 42 corresponding to the limiting hole 112, a limiting block 422 is slidably provided in the guiding slot 421, a socket portion 423 capable of being inserted into the limiting hole 112 is provided on the limiting block 422, a limiting elastic member 45 is provided between the limiting block 422 and the movable block 42, and an operating handle 44 is provided on the limiting block 422. When the wire is connected, the movable upper block 42 is pulled to be far away from the fixed block 41 by a certain distance, when the limiting hole 112 and the limiting block 422 are aligned, the limiting block 422 slides along the guide groove 421 under the elastic action of the limiting elastic piece 45, so that the socket part 423 is inserted into the limiting hole 112, the movable block 42 is limited to slide, the movable block 42 and the fixed block 41 are kept at a distance, the end of the wire 2 is convenient to insert, the end of the wire 2 is inserted, the limiting block 422 is pulled into the guide groove 421 by the operating handle 44, so that the socket part 423 is removed from the limiting hole 112, and at the moment, the movable block 42 is close to the fixed block 41 under the elastic restoring force of the clamping elastic piece 43 so as to clamp the end of the wire 2.

In this embodiment, an L-shaped opening 5 through which the operating handle 44 passes is provided on a side wall of the chute 111, and the operating handle 44 extends to the outside of the metal clip lever 11 through the L-shaped opening 5. The L-shaped through opening 5 is L-shaped, and has the same shape as the movement track of the limiting block 422, so that the operating handle 44 can pass through. The operating handle 44 passes through the L-shaped through hole 5 and extends to the outside of the metal clamping rod 11, so that the movable block 42 and the limiting block 422 can be pulled out manually.

In this embodiment, the end surface of the socket portion 423 facing the limiting hole 112 is provided with the rolling member 6. When the movable block 42 slides along the chute 111, the rolling element 6 abuts against the bottom wall of the chute 111 under the elastic force of the limiting elastic element 45, and the socket part 423 forms rolling contact with the bottom wall of the chute 111 through the rolling element 6, so that friction is reduced. The clamping elastic member 43 and the limiting elastic member 45 are both springs.

In this embodiment, as shown in fig. 5 and 6, the wire takeup device 3 includes a circular wire takeup cover 31, a wire winding drum 32 provided in the circular wire takeup cover 31, and a rotation mechanism 33 for rotating the wire winding drum 32, two spaced wire threading openings 311 are provided on the circumferential side of the circular wire takeup cover 31, a wire passage 321 is penetrated through the wire winding drum 32 in the radial direction, and the electric wires 2 are penetrated in the wire threading openings 311 and the wire passage 321. The winding roll 32 is driven to rotate by the rotating mechanism 33, so that the electric wire 2 can be wound and unwound, and the exposed length of the electric wire 2 is adjusted.

In this embodiment, the rotation mechanism 33 includes a rotation handle 331, the rotation handle 331 is disposed outside the circular winding cover 31 and is fixedly connected to the center of the winding roll 32, and a locking member 332 for locking itself and the circular winding cover 31 is disposed on the rotation handle 331. The winding roll 32 can be driven to rotate by rotating the handle 331, the operation is convenient, and after the exposed length of the electric wire 2 is adjusted, the rotating handle 331 and the circular winding cover 31 are locked by the locking piece 332 so as to brake the winding roll 32. The locking piece 332 is a locking screw, the locking screw penetrates through the rotary handle 331 and is in threaded connection with the rotary handle 331, and a plurality of lock holes which are arranged around the rotation center of the rotary handle 331 at intervals are formed in the side surface of the circular wire collecting cover 31 corresponding to the locking screw, so that the locking screw can be inserted to lock the rotary handle 331 and the circular wire collecting cover 31. The wire 2 is a copper wire.

While the utility model has been described in terms of preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the utility model. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims (10)

1. A transformer test short circuit termination, its characterized in that: including four at least binding clips (1), each binding clip (1) establish ties through electric wire (2), is equipped with wire collector (3) on electric wire (2) between adjacent binding clips (1), binding clip (1) are including two middle part rotation metal clamp bars (11) of being connected, two the one end of metal clamp bars (11) is equipped with clamp wire head (12), the equal cover of the other end is equipped with insulating cover (13), two be equipped with between metal clamp bars (11) and make clamp wire head (12) draw close the elastic component of clamp wire, be equipped with wire fixing mechanism (4) on metal clamp bars (11), the tip of electric wire (2) is fixed on wire fixing mechanism (4).

2. The transformer test shorting wiring device of claim 1, wherein: the wire fixing mechanism (4) comprises a fixed block (41) and a movable block (42) which are oppositely arranged, the fixed block (41) is fixed on the metal clamping rod (11), the movable block (42) is slidably arranged on the metal clamping rod (11) and can be close to and far away from the fixed block (41), and a clamping elastic piece (43) is arranged between the movable block (42) and the metal clamping rod (11).

3. The transformer test shorting wiring device of claim 2, wherein: the side of the metal clamping rod (11) is provided with a chute (111), and the movable block (42) is slidably arranged in the chute (111).

4. A transformer test shorting wiring device as recited in claim 3 wherein: the movable block (42) is provided with an operation handle (44).

5. The transformer test shorting wiring device of claim 4, wherein: be equipped with spacing hole (112) on the diapire of spout (111), be equipped with on the position that movable block (42) corresponds with spacing hole (112) with spout (111) vertically guide way (421), the smooth stopper (422) that are equipped with in guide way (421), be equipped with socket joint portion (423) in can inserting spacing hole (112) on stopper (422), be equipped with spacing elastic component (45) between stopper (422) and movable block (42), operating handle (44) are located on stopper (422).

6. The transformer test shorting wiring device of claim 5, wherein: an L-shaped through hole (5) through which an operation handle (44) passes is formed in the side wall of the sliding groove (111), and the operation handle (44) passes through the L-shaped through hole (5) and extends to the outside of the metal clamping rod (11).

7. The transformer test shorting wiring device of claim 5, wherein: the end face of the socket part (423) facing the limiting hole (112) is provided with a rolling piece (6).

8. The transformer test shorting wiring device of claim 5, wherein: the clamping elastic piece (43) and the limiting elastic piece (45) are springs.

9. The transformer test shorting wiring device of any one of claims 1 to 8, wherein: the wire winding device comprises a wire winding device body and is characterized in that the wire winding device body comprises a round wire winding cover body (31), a wire winding disc (32) arranged in the round wire winding cover body (31) and a rotating mechanism (33) used for enabling the wire winding disc (32) to rotate, two threading openings (311) which are arranged at intervals are formed in the periphery of the round wire winding cover body (31), a threading channel (321) penetrates through the wire winding disc (32) in the radial direction, and the electric wire (2) penetrates through the threading openings (311) and the threading channel (321).

10. The transformer test shorting wiring device of claim 9, wherein: the rotating mechanism (33) comprises a rotating handle (331), the rotating handle (331) is arranged outside the circular wire collecting cover (31) and is fixedly connected with the center of the winding roll (32), and a locking piece (332) for locking the rotating handle (331) and the circular wire collecting cover (31) is arranged on the rotating handle.

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