CN211878022U

CN211878022U - Telescopic clip-on ammeter

Info

Publication number: CN211878022U
Application number: CN201922284752.6U
Authority: CN
Inventors: 招晓杰
Original assignee: Guangdong Power Grid Co Ltd; Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-11-06
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses a telescopic pincerlike ammeter, one end of an ammeter body is connected with a current transformer and two positioning and clamping devices, the two positioning and clamping devices are symmetrically arranged on two sides of the current transformer, and the other end of the ammeter body is in threaded connection with an insulating telescopic rod; the location clamping device includes that the base and the symmetry with ampere meter body fixed connection set up two T type grooves on the base, every all there is the grip slipper, two through spring coupling in the T type inslot the arc wall has all been seted up to the one side that the grip slipper is relative, the utility model discloses can put the central point of wire centre gripping at current transformer when the current measurement to in the wire, guarantee current measurement's accuracy in the wire, avoided because of the wire can not accurately place the central point who puts at current transformer and need many times measuring problem, and the insulating telescopic link of bottom can freely dismantle through threaded connection, conveniently accomodate and use.

Description

Telescopic clip-on ammeter

Technical Field

The utility model relates to a model test technical field especially relates to a telescopic pincerlike ampere meter.

Background

The clamp-on ammeter is formed by combining a current transformer and an ammeter, and can measure the circuit of the circuit when the circuit is not cut off. When the wrench is released, the iron core is closed, the lead of the tested circuit passing through the iron core becomes a primary coil of the current transformer, and current is induced in a secondary coil through the current, so that the current of the tested circuit is measured by an ammeter connected with the secondary coil.

The prior telescopic clamp-on ammeter measures a line at a high position at a low position, avoids the danger of climbing at the high position and operating at a near current, however, when the ordinary clamp ammeter and the telescopic clamp ammeter are used for measuring the current of the lead in the measured circuit, the lead needs to be positioned at the middle position of the current transformer as much as possible to more accurately measure the current in the measured circuit, however, the current clamp-on ammeter can only rely on the operation and vision of the operator to grasp the relative position of the wire in the current transformer during measurement, which results in the need of measuring the wire current in the circuit to be measured for many times to ensure the accuracy of the measured value, more operation times and waste of time, therefore, the telescopic clamp-on ammeter can be designed to determine the position of a measured wire in a current transformer and ensure the accuracy of measurement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a telescopic pincerlike ampere meter has solved current pincerlike ampere meter and can not be accurate put the central point that will be surveyed the wire and put and the unsafe problem of measuring result that causes when measuring at current transformer.

In order to achieve the above object, the present invention provides the following technical solutions:

one end of an ammeter body is connected with a current transformer and two positioning and clamping devices, the two positioning and clamping devices are symmetrically arranged on two sides of the current transformer, and the other end of the ammeter body is in threaded connection with an insulating telescopic rod;

the positioning and clamping device comprises a base fixedly connected with the ammeter body and two T-shaped grooves symmetrically arranged on the base, wherein each T-shaped groove is internally connected with a clamping seat through a spring, an arc-shaped groove is formed in one side, opposite to the clamping seat, of the clamping seat, and a connecting line of the middle points of the connecting line of the circle centers of the arc-shaped grooves passes through the central position of the current transformer.

As a preferred scheme of the utility model, current transformer includes the U type coil with this body coupling of ampere meter, symmetry swing joint has the baffle coil on two inside walls that U type coil is relative, and two the one end that the baffle coil is relative offsets.

As an optimized scheme of the utility model, insulating telescopic link includes that a plurality of passes through threaded connection's internal thread sleeve.

As an optimized scheme of the utility model, two the one end that the ampere meter body was kept away from to the grip slipper all is connected with the deflector, and every through locking bolt slope the one end that the grip slipper was kept away from to the deflector is circular-arc structure.

As an optimized proposal of the utility model, the arc-shaped groove side wall is glued and connected with an insulating rubber layer.

As an optimal scheme of the utility model, grip slipper, base and deflector are insulating material and make.

As an optimized scheme of the utility model, the symmetry is provided with a plurality of LED lamp pearl on the inside wall of U type coil.

The utility model discloses an embodiment has following advantage:

the utility model discloses can put the wire centre gripping at current transformer's central point when current measurement to in the wire, current measurement's accuracy in guaranteeing the wire has avoided putting at current transformer's central point because of the wire can not be accurate and need a lot of measuring problem, and the insulating telescopic link of bottom can freely dismantle through threaded connection, convenient storage and use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a telescopic clamp-on ammeter according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a positioning and clamping device according to an embodiment of the present invention;

fig. 3 is a schematic side view of a telescopic clamp-on ammeter according to an embodiment of the present invention.

In the figure:

1-ammeter body; 2-a current transformer; 3-a wire guide plate; 4-positioning the clamping device; 5, insulating telescopic rods; 7-LED lamp beads;

21-U-shaped coil; 22-baffle coils;

41-a base; 42-a clamping seat; 43-arc groove; 44-T type groove; 45-spring.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have the specific orientation, operate in the specific orientation configuration, and thus, should not be construed as limiting the present invention.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, the utility model provides a telescopic split core ammeter, which comprises an ammeter body 1, wherein one end of the ammeter body 1 is connected with a current transformer 2 and two positioning and clamping devices 4, the two positioning and clamping devices 4 are symmetrically arranged at two sides of the current transformer 2, and the other end of the ammeter body 1 is connected with an insulating telescopic rod 5 in a threaded manner;

the positioning and clamping device 4 comprises a base 41 fixedly connected with the ammeter body and two T-shaped grooves 44 symmetrically arranged on the base 41, a clamping seat 42 is connected in each T-shaped groove 44 through a spring 45, an arc-shaped groove 43 is formed in one side, opposite to the two clamping seats 42, of each T-shaped groove, and a connecting line corresponding to the middle point of a connecting line of the circle centers of the two arc-shaped grooves 43 passes through the center position of the current transformer 2.

The current transformer 2 comprises a U-shaped coil 21 connected with the ammeter body 1, two inner side walls opposite to the U-shaped coil 21 are symmetrically and movably connected with baffle coils 22, and one ends opposite to the two baffle coils 22 are abutted.

The insulating telescopic rod 5 comprises a plurality of internal thread sleeves which are connected through threads.

The one end that the ammeter body 1 was kept away from to two grip slipper 42 all is connected with deflector 3 through the locking bolt slope, and the one end that every deflector 3 kept away from grip slipper 42 is circular-arc structure.

The utility model needs to be further explained, the utility model is to add a positioning and clamping device 4 on the existing clamp-on ammeter to limit the position of the wire to be measured entering the current transformer 2 at the central position of the current transformer 2, to ensure the accuracy of the measuring result, when measuring the current of the wire in the circuit near the ground, the wire of the circuit to be measured extrudes the baffle coil 22 to make the two baffle coils 22 rotate to open the gap, so that the wire can enter the current transformer 2, then the two clamping seats 42 are separated by a distance towards the opposite direction manually, the spring 45 is compressed, then the clamp-on ammeter is moved to make the wire enter between the two clamping seats 42, then the clamping seats 42 are released, the clamping seats 42 move oppositely under the elastic force of the spring 45, the elastic force of each spring 45 is the same for the clamping seats 42, therefore, the distance from the middle position to the middle position after the movement of the clamping seats 42 stops is the same, the two clamping seats 42 limit the position of the wire at a fixed position, the spring 45 is still in a compressed state at the moment, and the elastic coefficient of the spring 45 is larger, so that larger elastic force still acts on the clamping seats 42, the clamping seats 42 can still ensure that the clamping seats 42 can not slide in the T-shaped groove 44 under the action of certain external force, because the central connecting line of the corresponding two clamping seats 42 and the central connecting line of the other two clamping seats 42 are collinear with the central line of the current transformer 2, the position of the wire is limited at the central position of the current transformer 2 under the limitation of the two positioning and clamping devices 4, the result of the current induced by the current transformer 2 after being measured by the ammeter body 1 is more accurate, and the wire does not need to be measured for a plurality of times because the wire is not in the central position of the current transformer 2 to ensure the, save measuring time, improve work efficiency.

When the current in the high-altitude line is measured, the two guide plates 3 are symmetrically arranged on the clamping seat 42, so that when the clamp-on ammeter is used for measuring, the distance of the high-altitude line is far, the two clamping seats 42 cannot be manually operated to be separated to a certain size, so that a wire can enter between the two clamping seats 42, after the two guide plates 3 are arranged, after the insulating telescopic rod 5 is extended to a preset length, the current transformer 2 of the clamp-on ammeter is pushed towards the direction of the wire, so that the wire pushes the two baffle coils 22 open and rotates, the gap is opened, the wire enters into the current transformer 2, meanwhile, because the two guide plates 3 are obliquely arranged, the wire also enters between the two corresponding guide plates 3 while entering the current transformer 2, continues to move towards the direction of the wire, so that the wire gradually moves towards the direction of the clamping seats 42, and the distance between the two guide plates 3 is smaller and smaller, so that the guide plates 3 are gradually extruded towards the two sides by the lead, the guide plates 3 gradually move back and forth to drive the two clamping seats 42 to move back and forth, the spring 45 is compressed until the lead enters the space between the two clamping seats 42 to stop moving, the two clamping seats 42 move towards each other under the action of the elastic force of the spring 45 to clamp the lead, the position of the lead is assigned to the central position of the current transformer 2, the current in the lead is measured at the moment, after the measurement is finished, the insulating telescopic rod 5 is pulled to move towards the direction far away from the lead, so that the lead starts to extrude the side walls of the two clamping seats 42, as the side walls of the clamping seats 42 are arc-shaped, the two sides are clamped by the elastic force of the spring 45, the two clamping seats 42 move back and forth under the action of a certain extrusion force, similarly, the baffle coil 22 is extruded to be separated from the current transformer 2, and the clamp-on ammeter is taken back to read the value. The other two clamping seats 42 clamp the wires at limited positions through springs 45, so that the wires with different diameters can be clamped, and the measurement of the wires with one diameter is not limited.

An insulating rubber layer is glued on the side wall of the arc-shaped groove 43. The arrangement of the insulating rubber layer can protect the lead when the clamping seat 42 clamps the lead, and the lead is prevented from being damaged due to extrusion force or friction with the side wall of the clamping seat 42.

The clamping seat 42, the base 41 and the guide plate 3 are all made of insulating materials. The insulating material is made to ensure the insulativity of the device, avoid influencing the measuring result and ensure the use safety.

A plurality of LED lamp beads 7 are symmetrically arranged on the inner side wall of the U-shaped coil 21.

LED lamp pearl's power is low, and its power supply can be external from ampere meter itself, perhaps sets up a battery jar in U type coil 21 one side, and the installation battery comes the power supply to LED lamp pearl, in this embodiment, only need realize the illumination function can, do not specially limit to its power supply mode, LED lamp pearl 7 set up and conveniently use this device to carry out relevant operation evening, especially can not be because of not having light and unable operation when lacking extra light source.

The foregoing description of the embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also vary in many respects. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.

Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising" are intended to be inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless explicitly indicated as an order of performance. It should also be understood that additional or alternative steps may be employed.

When an element or layer is referred to as being "on" … … "," engaged with "… …", "connected to" or "coupled to" another element or layer, it can be directly on, engaged with, connected to or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on … …," "directly engaged with … …," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" can encompass both an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted.

Claims

1. The telescopic split-core ammeter is characterized by comprising an ammeter body (1), wherein one end of the ammeter body (1) is connected with a current transformer (2) and two positioning and clamping devices (4), the two positioning and clamping devices (4) are symmetrically arranged on two sides of the current transformer (2), and the other end of the ammeter body (1) is in threaded connection with an insulating telescopic rod (5);

the positioning and clamping device (4) comprises a base (41) fixedly connected with an ammeter body and two T-shaped grooves (44) symmetrically arranged on the base (41), each T-shaped groove (44) is internally connected with a clamping seat (42) through a spring (45), the clamping seats (42) are opposite to each other, an arc-shaped groove (43) is formed in one side of each clamping seat (42), and the clamping grooves correspond to two connecting lines of the middle points of connecting lines of the circle centers of the arc-shaped grooves (43) and pass through the center position of the current transformer (2).

2. The telescopic split-core ammeter according to claim 1, wherein the current transformer (2) comprises a U-shaped coil (21) connected to the ammeter body (1), two opposite inner side walls of the U-shaped coil (21) are symmetrically and movably connected with baffle coils (22), and opposite ends of the two baffle coils (22) are abutted.

3. The telescopic clamp ammeter according to claim 1 wherein said insulating telescopic rod (5) comprises a plurality of internally threaded sleeves connected by a thread.

4. The telescopic clamp-on ammeter according to claim 1, wherein the ends of the two clamping bases (42) far away from the ammeter body (1) are obliquely connected with guide plates (3) through locking bolts, and the end of each guide plate (3) far away from the clamping base (42) is of an arc-shaped structure.

5. The telescopic clamp ammeter of claim 1 wherein said arcuate slot (43) is rubberized with an insulating rubber layer on the side wall.

6. The telescopic clamp ammeter according to claim 4, wherein the holder (42), the base (41) and the guide plate (3) are made of insulating materials.

7. The telescopic clamp ammeter according to claim 2, wherein the inner side wall of the U-shaped coil (21) is symmetrically provided with a plurality of LED lamp beads (7).