On-load tap-changer static contact calibration and detection tool
By designing a testing fixture that includes a height measuring platform, an angle plate, and a testing arm, the problems of large errors and slow speed in the testing of stationary contacts of on-load tap changers were solved. The fixture enables simultaneous calibration of the height and angle of the stationary contact, thereby improving testing accuracy and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-03-27
AI Technical Summary
Existing technologies suffer from large errors and slow speed in detecting stationary contacts of on-load tap changers, especially due to inaccurate distances between stationary contacts caused by manual measurement.
A calibration and testing fixture including a base plate, a height measuring platform, an angle plate, a testing arm, and a level testing probe was designed. The height measuring platform and calibration plate ensure the height consistency of the stationary contacts, the angle plate detects the angle, and the testing arm and probe detect the levelness, enabling simultaneous calibration and testing of multiple stationary contacts.
It improves the accuracy and efficiency of stationary contact detection, reduces errors caused by manual measurement, and increases production efficiency.
Smart Images
Figure CN224051240U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detection frock technical field, concretely relates to a kind of on-load tap-changer static contact calibration and detection frock. BACKGROUND
[0002] Tap-changer is a kind of voltage regulating device for changing the tap connection position of transformer winding, and is mainly divided into two categories of on-load tap-changer and no-excitation tap-changer:
[0003] On-load tap-changer: can operate under the state of transformer excitation or load, and change the tap of transformer winding to change the number of turns of winding and adjust the voltage ratio of transformer to achieve the purpose of voltage regulation without interrupting load current. Its circuit is composed of transition circuit, selection circuit and voltage regulating circuit, and can be divided into switching switch, tap selector and operating mechanism.
[0004] No-excitation tap-changer: needs to operate under the condition of transformer power-off and no excitation, changes the tap position of transformer winding to adjust the number of turns of winding and change the voltage ratio of transformer to achieve the effect of voltage regulation.
[0005] As shown in Figure 7 The existing on-load tap-changer static contact; in the production process, first, the conductive support rod is riveted with copper plate, the contact is welded on both sides of the copper plate by using brass or copper-silver welding rod, in this process, there may be copper plate bending, conductive support rod skewing or contact part not being welded well, when the conductive support rod appears skewing phenomenon, it needs to be calibrated before use, so there may be large deviation in the distance between static contact and moving contact and the levelness caused by improper bolt fastening or substrate (i.e. static contact mounting substrate) production during assembly. At present, when detecting the static contact of on-load tap-changer, the distance between contacts is generally measured by using caliper after assembling the whole machine, and due to the influence of the difference in measuring personnel level, it is not only slow but also has large error.
[0006] Therefore, it is urgent to need a calibration and detection frock to solve the above problems. UTILITY MODEL CONTENT
[0007] The utility model provides an on-load tap-changer static contact calibration and detection frock to solve the problems raised in the above background technology.
[0008] To achieve the above purpose, the utility model provides the following technical scheme:
[0009] The utility model provides a kind of calibration and detection tool for load tap changer static contact, including bottom plate, height measuring platform, angle flat plate, detection arm, the edge of the bottom plate is provided with a plurality of jack in annular array, the top surface of the bottom plate is equipped with height measuring platform, the height measuring platform includes a plurality of first equal height block and second equal height block, a plurality of first equal height block and second equal height block are staggered and spliced to form annular mesa structure, the angle flat plate is circular structure, the edge of the angle flat plate is provided with a plurality of calibration plate along the center of circle annular array, the angle flat plate is equipped on the top of the height measuring platform, the center of the bottom plate is equipped with pivot, the pivot top is connected with the center of the detection arm, and the both ends of the detection arm are equipped with horizontal detection probe.
[0010] Preferably, the inner side of the first equal height block and the second equal height block is provided with a plurality of grooves, and the plurality of calibration plates are embedded in the grooves.
[0011] Preferably, the first equal height block and the second equal height block are flush.
[0012] Beneficial effects
[0013] The above one or more technical solutions in the calibration and detection tool for load tap changer static contact provided by the utility model embodiment at least has one of the following technical effects:
[0014] In the above technical solution, when detecting, a plurality of static contacts are placed in annular array on the top of the bottom plate, the plurality of static contacts surround the height measuring platform, the conductive support rod is inserted into the jack, and the bottom surface of the copper plate is attached to the top surface of the first equal height block and the second equal height block, so that the connection height between the copper plate of each static contact and the conductive support rod is the same height. The inner side wall of the copper plate is attached to the outer side wall of the calibration plate, and whether there is a gap between the copper plate and the calibration plate is observed to detect whether the angle of the static contact is qualified. By rotating the detection arm, the horizontal detection probe at both ends of the detection arm sweeps the copper plate part of the static contact, so as to detect whether the static contact is horizontal and neat. The utility model is suitable for the arrangement of this type of static contact, and the height, angle and final level of a plurality of static contacts can be tested and adjusted simultaneously by the height measuring platform, the angle flat plate, the calibration plate, the detection arm and the horizontal detection probe. The problem of error and time-consuming caused by manual measurement is effectively solved, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;
[0016] Figure 2 It is a bottom plate structure schematic diagram of the utility model;
[0017] Figure 3 It is a height measuring platform structure schematic diagram of the utility model;
[0018] Figure 4 It is angle flat structure schematic view of the utility model;
[0019] Figure 5 It is detection arm structure schematic view of the utility model;
[0020] Figure 6 It is use state structure schematic view of the utility model;
[0021] Figure 7 It is load tap changer static contact structure schematic view.
[0022] The corresponding relationship between the reference signs and the component names in the drawings is as follows:
[0023] 1, bottom plate;2, height measuring platform;3, angle flat plate;4, detection arm;5, jack;6, first equal height block;7, second equal height block;8, calibration plate;9, rotating shaft;10, horizontal detection probe;11, sink groove;12, static contact;13, copper plate;14, contact;15, conductive support rod. DETAILED DESCRIPTION
[0024] The technical solutions of the utility model will be described clearly and completely in combination with the embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.
[0025] In the description of the utility model, it needs to be understood that the directions or position relations indicated by the terms such as 'up', 'down', 'left', 'right' are the directions or position relations based on the directions or position relations shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated must have a particular direction, be constructed and operated in a particular direction, therefore, it cannot be understood as a limitation on the utility model.
[0026] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms'set', 'install', 'connect', 'connect' should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0027] In order to avoid too many unnecessary details, the structure or function belonging to the known will not be described in detail in the following embodiments.
[0028] As Figures 1-7 shown, it is a structure schematic view of a kind of load tap changer static contact calibration and detection tool of a preferred embodiment of the utility model;
[0029] In the embodiment, including base plate 1, height measuring platform 2, angle flat plate 3, detection arm 4, the edge of base plate 1 is provided with a plurality of jack 5 along annular array, a plurality of jack 5 are all circular holes, the top surface of base plate 1 is equipped with height measuring platform 2, the height measuring platform 2 is the annular mesa structure formed by the staggered splicing of a plurality of first equal-height blocks 6 and second equal-height blocks 7, the angle flat plate 3 is circular structure, the edge of angle flat plate 3 is provided with a plurality of calibration plate 8 along the center of circle annular array, a plurality of calibration plate 8 are arranged in divergent shape, the outer side wall of calibration plate 8 is all plane structure, the angle flat plate 3 is located at the top of height measuring platform 2, the center of base plate 1 is equipped with pivot 9, the top of pivot 9 is connected with the center of detection arm 4, which is penetrated through angle flat plate 3, this structure makes that detection arm 4 can rotate along the center of height measuring platform 2 and angle flat plate 3, both ends of detection arm 4 are equipped with horizontal detection probe 10, when detection compares 4 rotation and drives both ends horizontal detection probe to sweep static contact, to realize the purpose of detecting levelness.
[0030] In the embodiment, the inner side of a plurality of first equal-height blocks 6 and second equal-height blocks 7 is provided with a plurality of recesses 11, a plurality of calibration plate 8 is respectively embedded in a plurality of recesses 11.This structure realizes the installation of angle flat plate 3, so that angle flat plate 3 can cooperate with height measuring platform 4, to complete the height and angle measurement of static contact 12 simultaneously.
[0031] In the embodiment, a plurality of first equal-height blocks 6 and second equal-height blocks 7 are flush in height.Guarantee the consistency of measurement data.
[0032] In the embodiment, the static contact 12 of the on-load tap changer comprises a copper plate 13, both sides of the copper plate 13 are provided with contacts 14, and the bottom end of the copper plate 13 is provided with two conductive support rods 15. During detection, a plurality of static contacts 12 are arranged in a ring array on the top of the base plate 1, the static contacts 12 surround the measuring platform 2, the conductive support rods 15 are inserted into the insertion holes 5, the bottom end surface of the copper plate 13 is attached to the top end surface of the first and second leveling blocks 6 and 7, so that the connection height between the copper plate 13 of each static contact 1 and the conductive support rod 15 is the same, and the bending of the copper plate 13 can be detected, and the flatness of the copper plate 13 is ensured; the inner side wall of the copper plate 13 is attached to the outer side wall of the calibration plate 8, whether there is a gap between the copper plate 13 and the calibration plate 8 is observed, so that whether the angle of the static contact 12 is qualified is detected, so that whether the conductive support rod 15 is skewed is detected; the horizontal detection probe 10 at both ends of the detection arm 4 is swept over the copper plate 13 of the static contact 12 by rotating the detection arm 4, so that whether the static contact 12 is horizontal and neat is detected.
[0033] The installation mode, connection mode or setting mode of the on-load tap changer static contact calibration and detection tool are common mechanical modes, and any mode that can achieve the beneficial effects can be implemented.
[0034] The technologies not described in detail in the utility model are known technologies, and the contents represented in the drawings are part of the specification.
[0035] The above content is a further detailed description of the utility model in combination with the specific embodiments, and cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection range determined by the claims submitted by the utility model.
Claims
1. A calibration and detection tool for a static contact of an on-load tap changer, characterized in that: The utility model relates to a height detection device, including bottom plate (1), height detection platform (2), angle flat plate (3), detection arm (4), the edge of bottom plate (1) is equipped with a plurality of insertion hole (5) along annular array, the top surface of bottom plate (1) is equipped with height detection platform (2), the height detection platform (2) is the annular mesa structure formed by the interlaced splicing of a plurality of first equal height block (6) and second equal height block (7), angle flat plate (3) is circular structure, angle flat plate (3) edge is equipped with a plurality of calibration plate (8) along the circular center annular array, angle flat plate (3) is located height detection platform (2) top, bottom plate (1) center is equipped with pivot (9), pivot (9) top penetrates angle flat plate (3) with detection arm (4) center place connection, both ends of detection arm (4) are equipped with horizontal detection probe (10).
2. The load tap changer stationary contact calibration and detection tooling of claim 1, wherein: The inner side of a plurality of first equal height block (6) and second equal height block (7) is equipped with a plurality of sunken groove (11), and a plurality of calibration plate (8) are embedded in a plurality of sunken groove (11) respectively.
3. The load tap changer stationary contact calibration and detection tooling of claim 1, wherein: A plurality of first equal height block (6) and second equal height block (7) are flush.