CN220064174U - Multifunctional electric test clamp for overhauling high-voltage transformer substation - Google Patents

Abstract

The utility model relates to the technical field of electric overhaul tools, and particularly discloses a multifunctional electric test clamp for overhaul of a high-voltage transformer substation, which comprises a clamping part and a hand holding part, wherein the hand holding part is provided with a clamping head, a handle and a pin shaft, the clamping part is provided with a clamping block and a clamping plate, the clamping block is arranged in the clamping head, and the head part of the clamping block is fixedly connected with the clamping plate; according to the utility model, the two arc toothed raised copper sheets additionally arranged on the clamping part can be freely arranged on the universal clamp according to the requirement of the on-site to-be-overhauled test equipment, the clamping force is large, the centralized use of various electrical equipment such as a switch cabinet circuit breaker plum blossom contact and the like after the novel temperature measuring ring is additionally arranged can be ensured, the contact is good during the test, the contact surface with the circuit breaker plum blossom contact is greatly increased, the error of test items such as loop resistance test and the like is greatly reduced, the overhauling efficiency is improved, the test time is saved, the spare part cost of the test equipment is saved, and the electrical test is accurate, convenient, safe and reliable.

Description

Multifunctional electric test clamp for overhauling high-voltage transformer substation

Technical Field

The utility model relates to the technical field of electric overhaul tools, in particular to a multifunctional electric test clamp for overhaul of a high-voltage transformer substation.

Background

In daily electrical test work, three-channel direct current resistance test, loop resistance test, dielectric loss test and other test items are required to be carried out on electrical equipment such as transformers, switch cabinets and the like in a transformer substation on site. When the test is carried out, the equipment terminal connection needs tools such as test clamps, shorting bars and the like with proper models and sizes. Because the types of the electrical equipment parts of the transformer substation are different, the practical limitation of the existing matched type tools and tools is large, so that related test work cannot be normally performed, and the innovation of the utility model is urgently needed.

Taking a 110kV wide-thick plate transformer substation as an example, when loop resistance test is carried out on a switch cabinet circuit breaker handcart, two clamp jaws are needed at the equipment end, the clamp jaws are required to be tightly meshed with three-phase plum blossom contacts of a circuit breaker A, B, C, one circuit breaker is provided with 6 contacts, a split-phase test is required to be carried out according to the requirement, and the common clamp jaws can meet the test standard requirement; but at 110kV cold rolling, 110kV hot rolling, 110kV sintering etc. many substations, circuit breaker contact spring all has novel stainless steel banded temperature measurement ring, and novel temperature measurement ring "tight ferrule" is just equipped with theftproof buckle on the contact firmly lock, can not use screwdriver and pliers to take off the temperature measurement ring, causes mechanical injury easily and causes the high voltage potential hazard more easily.

A gap of 0.5mm is reserved only at the edge of the contact, and the jaw of a conventional test clamp is too large, so that the test cannot be normally performed. The same situation also occurs in all main transformer tests of the transformer substation, and when the transformer is pressurized by three-way direct current resistance test and the like, the transformer is required to be in short circuit with the A, B, C. Because the transformer outlet side all has insulating sleeve parcel and does not have practical test tool, consequently must manual demolish wiring side sleeve skin, bolt etc. before the test and twine the shorting stub in carrying out manual, very big delay overhauls test and disappears lack and power transmission time. Therefore, there is an urgent need to design a multifunctional electrical test clamp for overhauling a high-voltage transformer substation, so as to solve the problem that the existing clamp is inconvenient for a plum blossom contact of a circuit breaker to cause low overhauling efficiency.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model aims to provide a multifunctional electric test clamp for overhauling a high-voltage transformer substation.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a multi-functional electric test clamp for high voltage transformer substation overhauls, includes clamping part and hand portion, hand portion is equipped with chuck, handle and round pin axle, and the clamping part is equipped with clamp splice and splint, and the clamp splice is installed inside the chuck, and the head fixed connection splint of clamp splice.

Specifically, the clamping head and the handle are integrally formed, the clamping head and the handle are made of insulating materials, the two groups of clamping heads and the handle are rotationally connected through the pin shaft, the torsion spring is arranged on the pin shaft, and the pretightening force of the torsion spring controls the two clamping heads to be close to each other for clamping.

Specifically, the inboard of chuck is equipped with the recess, installs the clamp splice in the recess, and the clamp splice adopts arc cusp protruding copper sheet, and the rear portion fixed connection baffle of clamp splice, the bar groove of chuck side is stretched out to the baffle, is equipped with the wire mounting hole on the baffle, and the baffle passes through wire mounting hole and screwed connection test wire.

Specifically, the corresponding positions of the clamping head and the clamping block are provided with bolt holes, bolts are arranged in the bolt holes, and the clamping block is detachably arranged in the groove of the clamping head.

Specifically, the clamping plate is provided with a clamping block head fixed at one side, and the inner side of the clamping plate is provided with a U-shaped groove.

The utility model has the following beneficial effects:

the two arc toothed raised copper sheets added on the clamping part of the multifunctional electric test clamp for overhauling the high-voltage transformer substation can be freely added on the universal clamp according to the requirement of the on-site overhauling test equipment, the clamping force is large, various electric equipment such as a plum blossom contact of a switch cabinet breaker after a novel temperature measuring ring is added can be ensured to be used in a concentrated manner, the contact is good during the test, the contact surface with the plum blossom contact of the breaker is greatly increased, the error of test items such as loop resistance test is greatly reduced, the overhauling efficiency is improved, the test time is saved, the spare part cost of the test equipment is saved, and the electric test is accurate, convenient, safe and reliable.

Drawings

Fig. 1 is a schematic structural view of a multifunctional electrical test clamp for high-voltage substation maintenance.

Fig. 2 is a side view of a multifunctional electrical test clamp in use for high voltage substation maintenance.

In the figure: 1-clamping parts, 1.1-clamping blocks, 1.2-clamping plates, 1.3-guide plates, 1.4-U-shaped grooves, 1.5-bolts and 1.6-wire mounting holes;

2-hand holding parts, 2.1-clamping heads, 2.2-handles and 2.3-pin shafts;

3-breaker tulip contacts.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described in further detail below with reference to the accompanying drawings in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-2, a multifunctional electric test clamp for overhauling a high-voltage transformer substation comprises a clamping part 1 and a hand holding part 2, wherein the hand holding part 2 is provided with a clamping head 2.1, a handle 2.2 and a pin shaft 2.3, the clamping head 2.1 and the handle 2.2 are integrally formed, the clamping head 2.1 and the handle 2.2 are made of insulating materials, the two groups of clamping heads 2.1 and the handle 2.2 are rotationally connected through the pin shaft 2.3, a torsion spring is arranged on the pin shaft 2.3, and the pretightening force of the torsion spring controls the two clamping heads 2.1 to be close to each other for clamping.

The clamping part 1 is provided with a clamping block 1.1, a clamping plate 1.2 and a guide plate 1.3, wherein the clamping block 1.1 is arranged in the clamping head 2.1, and the head part of the clamping block 1.1 is fixedly connected with the clamping plate 1.2.

The inner side of the clamping head 2.1 is provided with a groove, a clamping block 1.1 is arranged in the groove, bolt holes are formed in corresponding positions of the clamping head 2.1 and the clamping block 1.1, bolts 1.5 are arranged in the bolt holes, and the clamping block 1.1 is detachably arranged in the groove of the clamping head 2.1.

The clamp splice 1.1 adopts arc tooth form protruding copper sheet, and clamp splice 1.1's rear portion fixed connection baffle 1.3, and baffle 1.3 stretches out the bar groove of chuck 2.1 side, is equipped with wire mounting hole 1.6 on the baffle 1.3, and baffle 1.3 passes through wire mounting hole 1.6 and screwed connection test wire.

The clamping plate 1.2 is provided with one clamping block 1.1 head part which is vertically welded and fixed on one side of the clamping plate 1.2, the inner side of the clamping plate 1.2 is provided with a U-shaped groove 1.4, as shown in figure 2, the U-shaped groove 1.4 is clamped outside the circuit breaker tulip contact 3, and the other clamping block 1.1 is clamped inside the circuit breaker tulip contact 3.

Embodiments of the utility model: firstly, measuring the sizes of clamps and gaps, designing a special assembly tool model, innovatively modifying two sets of multifunctional test clamps on the basis of the existing clamps, meeting the overhaul and use requirements of various electrical equipment, finding out old copper sheets with proper sizes (three millimeters thick) from daily collected waste materials, and performing drilling cutting, grinding polishing, assembly welding on materials with proper lengths such as shorting bars.

After the utility model is used, the clamp is ensured to be stably snapped on the quincuncial contact 3 of the circuit breaker, the three-phase equipment end contact of the transformer and the like when the high-voltage electric test is performed, the requirements of overhaul test of various electric equipment are met, the equipment maintenance cost is greatly reduced, and the scratch and the clamping injury of operators caused by the clamp or the circuit breaker contact are avoided while the overhaul efficiency is improved. The problems that the repeated replacement of the test clamp is not matched with electrical equipment when the existing high-voltage equipment is overhauled, the overhauling time for completing power transmission is influenced, the accuracy of the whole-plant power grid equipment test is influenced, the economic benefit is low and the like are solved.

The multifunctional test clamp is suitable for 2-seat 220kV transformer substations, 9-seat 110kV transformer substations, 7-seat 35kV transformer substations and 54-seat 10kV transformer substations of the whole company.

The present utility model is not limited to the above embodiments, and any person who can learn the structural changes made under the teaching of the present utility model can fall within the scope of the present utility model if the present utility model has the same or similar technical solutions.

The technology, shape, and construction parts of the present utility model, which are not described in detail, are known in the art.

Claims (5)

1. A multifunctional electric test clamp for overhauling a high-voltage transformer substation is characterized by comprising a clamping part and a holding part, wherein the holding part is provided with a chuck, a handle and a pin shaft, the clamping part is provided with a clamping block and a clamping plate, the clamping block is arranged inside the chuck, and the head of the clamping block is fixedly connected with the clamping plate.

2. The multifunctional electric test clamp for overhauling high-voltage transformer substation according to claim 1, wherein the clamping heads and the handles are integrally formed, the clamping heads and the handles are made of insulating materials, the two groups of clamping heads and the handles are rotationally connected through a pin shaft, a torsion spring is arranged on the pin shaft, and the pretightening force of the torsion spring controls the two clamping heads to be close to each other for clamping.

3. The multifunctional electric test clamp for overhauling high-voltage transformer substation according to claim 1, wherein a groove is formed in the inner side of the clamp head, a clamping block is installed in the groove, the clamping block adopts an arc tooth-shaped convex copper sheet, the rear part of the clamping block is fixedly connected with a guide plate, the guide plate extends out of a strip-shaped groove on the side face of the clamp head, a wire installation hole is formed in the guide plate, and the guide plate is connected with a test wire through the wire installation hole and a screw.

4. The multifunctional electric test clamp for overhauling high-voltage transformer substation according to claim 3, wherein the clamping head and the clamping block are provided with bolt holes at corresponding positions, bolts are arranged in the bolt holes, and the clamping block is detachably arranged in the groove of the clamping head.

5. The multifunctional electric test clamp for overhauling high-voltage transformer substation according to claim 1, wherein the clamping plate is provided with a clamping block head fixed on one side, and a U-shaped groove is formed on the inner side of the clamping plate.