CN216485467U

CN216485467U - Trolley for error test of current transformer

Info

Publication number: CN216485467U
Application number: CN202122741805.XU
Authority: CN
Inventors: 张传萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-05-10
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses a trolley for a current transformer error test, wherein a trolley base is placed on two slide rails, the trolley base is of a square structure, a through hole is formed in the middle of the trolley base, universal rollers are uniformly distributed on the upper surface of the trolley base in an embedded mode, the universal rollers protrude out of the upper surface of the trolley base, stop devices are arranged on four side surfaces of the trolley base respectively and comprise stop surfaces and long bolts connected with the stop surfaces, the long bolts penetrate through a fixing piece, and the fixing piece is fixed in the middle position of the side surface of the trolley base. The utility model has simple structure, convenient operation, labor saving and improved working efficiency.

Description

Trolley for error test of current transformer

Technical Field

The utility model relates to the technical field of current generating device structural equipment, in particular to a trolley capable of moving universally and simple in structure for an error test of a current transformer.

Background

The current transformer error test is generally carried out by comparing a tested current transformer with a standard current transformer, the secondary current difference between the two current transformers is the error of the tested transformer, the test method is called as a comparison method, a coil of the tested current transformer is placed on a trolley of an integral test support during the test, the current trolley is structurally provided with two lower slide rails, a trolley base with a through hole is arranged on the upper surface of each slide rail, a tested piece is placed on the trolley, the slide rails can move back and forth on the integral test framework, once the position of the tested piece on the trolley is determined, if the position is required to be changed, the trolley needs to be moved out to manually adjust the position of the test piece, and in the case of large equipment, the manual movement of the test piece is not easy, the position adjustment of the existing trolley for the test pieces with different sizes is not flexible, therefore, a trolley for a test piece for a current transformer error test, which can automatically adjust the current transformer to a high degree, is urgently needed.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the trolley for the error test of the current transformer, and the tested piece is placed on the trolley, is flexible to move and is limited in position.

The technical scheme includes that a trolley base is placed on two sliding rails and can move on the sliding rails, the trolley base is of a square structure, a through hole is formed in the middle of the trolley base, universal rollers are evenly distributed on the trolley base in an embedded mode, the universal rollers protrude out of the upper surface of the trolley base, stopping devices are arranged on four side faces of the trolley base and comprise stopping surfaces and long bolts connected with the stopping surfaces, the long bolts penetrate through fixing pieces, and the fixing pieces are fixed in the middle of the side faces of the trolley base.

Furthermore, the four fixing pieces are welded on the side surface of the trolley base.

Further, the stop surface is a plane or a circular arc surface.

Further, the number of the universal rollers is more than 4.

The utility model has the beneficial effects that: can make the test piece freely remove on the dolly through a plurality of universal gyro wheels of surface embedding installation on dolly base, set up backstop device around the dolly base, the spacing test piece in four sides, backstop device's backstop face can also be the arc surface for the plane, the overall dimension of nimble adaptation test piece, whole dolly simple structure, convenient operation does not receive experimental whole frame construction's restriction, and the manual work nudges the test piece and can accomplish the removal, uses manpower sparingly, improves work efficiency.

Drawings

FIG. 1 is a diagram of a cart dedicated for a tested object in the prior art.

FIG. 2 is a structural diagram of a trolley for the current transformer error test.

FIG. 3 is a schematic structural view of a stop device of the trolley for the error test of the current transformer.

The labels in the figure are: the method comprises the following steps of 1-sliding rail, 2-trolley base, 3-through hole, 4-universal roller, 5-stopping device, 6-stopping surface, 7-fixing piece, 51-long bolt and 52-arc surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.

At present, large-scale power plants at home and abroad and enterprises with large electric power demand need to carry out error tests on current transformers when the current transformers are used, the current transformer error tests generally adopt a tested current transformer to be compared with a standard current transformer, the secondary current difference of the two current transformers is the error of the tested current transformer, the test method is called as a comparison method, then a tested piece needs to be placed on a trolley during the test, the trolley in the prior art is structurally provided with two slide rails 1 and a square trolley base 2 on the upper part, the slide rails 1 can move back and forth on a test integral framework by installing the two slide rails 1 on a slide way of the test integral framework, a through hole 3 is arranged in the middle of the trolley base 2 and is communicated with a contact plate at the bottom of the slide rail 1, however, a test piece is directly contacted on the trolley base 2, after the position is fixed during the test, to change position or fine setting, need shift up the dolly from whole experimental framework, the position of manual adjustment test piece, if the test piece structure of heavy current test is huge, the adjustment is not easy, and current dolly can only realize the back-and-forth movement of dolly base 2 on slide rail 1, in view of this, this application has provided a test piece can nimble removal and the novel dolly structure that has the spacing setting on dolly base 2.

The concrete structure is as follows: on the basis of the prior art, a plurality of universal rollers 4 are additionally arranged on the upper surface of a trolley base 2, the number of the universal rollers 4 is at least 4, the universal rollers 4 are uniformly arranged around a through hole 3, namely, the universal rollers are uniformly distributed on the upper surface of the trolley base 2, the universal rollers 4 are embedded into the trolley base 2 and protrude out of the surface of the trolley base 2, a test piece is directly contacted with the universal rollers 4 and is limited by a peripheral stop device 5, the stop device 5 structurally comprises a stop surface 6 and a long bolt 51 fixedly connected with the stop surface 6, the stop surface 6 is contacted with the outer wall of the test piece, the stop device 5 is fixed with the side surface of the trolley base 2 through a fixing piece 7, the fixing piece 7 is fixed on the side surface of the trolley base 2 through 2 bolts, the number of the stop devices 5 is 4, the number of the fixing pieces 7 is 4, and the fixing piece 7 has a square structure, as shown in figure 2, the long bolt 51 penetrates through the fixing part 7, the fixing part 7 has a certain thickness, the thickness of the fixing part is 3-4 cm, the long bolt 51 can be screwed into a threaded hole of the fixing part 7, the thread is tightened, the stop surface 6 can be of a planar structure, more preferably, the circular arc surface 52 can be used, if the test piece is circular, the test piece can be better attached to the outer wall of the test piece, the limiting effect is good, if the position of the test piece on the trolley is required to be changed, the long bolt 51 can be screwed, the test piece can freely move on the trolley base 2, the position is determined to be limited through the stop device 5, the novel trolley has the advantages that the novel trolley is not limited by an integral framework structure, the test piece can be moved by lightly pushing the test piece, manpower is saved, the stop device 5 is arranged on the periphery for limiting, the position of the test piece can be fixed, and meanwhile, the requirement of an error test of the current transformer is met. The utility model has simple structure, convenient operation, labor saving and improved working efficiency.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. Current transformer is dolly for error test, is dolly base (2) on two slide rails (1), its characterized in that: dolly base (2) have through mouth (3) for square block shape structure and centre, dolly base (2) above embedded equipartition universal gyro wheel (4), universal gyro wheel (4) outstanding dolly base (2) upper surface four sides of dolly base (2) all be provided with backstop device (5), backstop device (5) including backstop face (6) and stay bolt (51) of connecting backstop face (6), stay bolt (51) pass mounting (7), mounting (7) fix the side position placed in the middle of dolly base (2).

2. The trolley for the error test of the current transformer according to claim 1, wherein: the four fixing pieces (7) are welded on the side surface of the trolley base (2).

3. The trolley for the error test of the current transformer according to claim 1, wherein: the stop surface (6) is a plane or a circular arc surface (52).

4. The trolley for the error test of the current transformer according to claim 1, wherein: the number of the universal rollers (4) is more than 4.