Current polarity transformation ratio testing device

Abstract

The utility model relates to the technical field of electric power, in particular to a current polarity transformation ratio testing device which comprises a box body, a testing module is arranged on the box body, wrapping pieces are arranged at the corners of the periphery of the outer side of the box body, the outline of the cross section of each wrapping piece is of an L-shaped structure, and each wrapping piece comprises a wear-resisting layer, an outer wrapping layer and an inner wrapping layer which are sequentially arranged from outside to inside. A buffering cavity is formed between the outer wrapping layer and the inner wrapping layer, a plurality of elastic balls made of elastic materials are movably connected into the buffering cavity, and the elastic balls can flexibly roll in the buffering cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power, in particular to a current polarity ratio test device. Background Art

[0002] After the construction of the switch cabinet is completed and before operation, it is necessary to test and accept each component inside it to ensure the normal operation of the switch cabinet. Among them, the test items of the current transformer are: ratio and polarity tests. At present, the test method for the in-place current transformer is that the construction personnel drill into the switch cabinet to make electrical connections at the test wire ends, and complete the connection of the above test circuits for the A, B, C three-phase and zero-sequence 4 current transformers. There are also some that use more convenient test devices, such as the current transformer ratio and polarity test device disclosed in Chinese Patent CN117192235B. In this technical solution, the main structure of the device is a box body, and support legs are hinged at the bottom of the box body. In actual use, it is often necessary to carry this box body around in various complex working environments. When operating, it is inevitable to place this box body on the floor, window sill, steps, etc. During these operation processes and the erection and storage processes of the support legs, it is very easy to bump the box body, resulting in scratches on the surface structure at the lightest, and damage to the delicate internal electronic components at the heaviest. Summary of the Utility Model

[0003] The utility model provides a current polarity ratio test device, which is beneficial to solving the problem that some existing device main bodies lack anti-collision mechanisms, resulting in easy wear and damage of the structure in complex usage scenarios.

[0004] The utility model is implemented as follows:

[0005] A current polarity ratio test device includes a box body, a test module is provided on the box body, and wrapping parts are provided at the corners of the outer periphery of the box body. The cross-sectional contour of the wrapping part is an "L" - shaped structure. The wrapping part includes a wear-resistant layer, an outer wrapping layer, and an inner wrapping layer arranged in sequence from outside to inside. A buffer cavity is provided between the outer wrapping layer and the inner wrapping layer, and a number of elastic balls made of elastic materials are movably connected in the buffer cavity, and the elastic balls can roll flexibly in the buffer cavity.

[0006] On the basis of the above technical solution, the wear-resistant layer, the outer wrapping layer, and the inner wrapping layer are fixedly connected by gluing in sequence, and the inner side end of the inner wrapping layer is glued to the outer corner of the box body.

[0007] On the basis of the above technical solution, the cross-sectional contour of the outer wrapping layer is a "U" - shaped structure, and its concave side is close to the inner wrapping layer, and the buffer cavity is formed after combination, and the buffer cavity is a sealed chamber structure.

[0008] On the basis of the above technical solution, a composite layer is provided between the wear-resistant layer and the outer wrapping layer, and the composite layer makes the inner end face of the wear-resistant layer form a stepped end face structure.

[0009] On the basis of the above technical solution, a number of glue holes are provided on the composite layer, and the glue holes penetrate through the composite layer for filling composite glue.

[0010] On the basis of the above technical solution, the glue holes are of a circular through-hole structure, and a number of glue holes are evenly distributed on the plane of the composite layer.

[0011] On the basis of the above technical solution, a number of elastic columns made of elastic materials are further provided in the buffer cavity. The two axial ends of the elastic column are respectively connected to the outer wrapping layer and the inner wrapping layer, and the elastic telescopic direction of the elastic column is parallel to its axis.

[0012] On the basis of the above technical solution, the elastic column is composed of a number of hollow corrugated blocks axially connected, and adjacent corrugated blocks form a staggered corrugated structure in the radial direction.

[0013] On the basis of the above technical solution, the axial length of the elastic column is greater than the diameter of the elastic ball in the natural extension state, and the axial length of the elastic column can be shorter than the diameter of the elastic ball after being compressed.

[0014] Compared with the prior art, the present utility model has at least the following advantages:

[0015] By providing a wrapping member at the corners around the outside of the box body, the anti-collision structure of the box body is formed. The wrapping member adopts a composite structure, and its surface is provided with a wear-resistant layer, which can increase the durability of the contact between the box body and the external rigid structure when placed, and avoid the outer surface of the main area of the box body from being easily scratched and worn; a buffer cavity is provided inside the wrapping member, and an elastic ball is provided inside the buffer cavity. By using the elastic force characteristics of the elastic ball itself, it can absorb mechanical potential energy in time and convert it into kinetic energy when being strongly impacted externally, so as to buffer and protect the box body. This is beneficial to solving the problem that the main body of some existing devices lacks an anti-collision mechanism, resulting in the structure being easily worn and damaged in complex usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the simple structure of the current polarity ratio test device in an embodiment;

[0018] Figure 2 is Figure 1 a partial cross-sectional view of the package in

[0019] Figure 3 a schematic diagram of the distribution structure of the elastic balls inside the buffer cavity when the package is in a tilted posture in an embodiment;

[0020] Figure 4 a schematic diagram of the position of the composite layer in an embodiment;

[0021] Figure 5 is Figure 4 a schematic plan view of the composite layer in

[0022] Figure 6 a cross-sectional view of the structure of the elastic column in an embodiment.

[0023] Reference numerals in the figures: 1, box body; 2, package; 21, wear-resistant layer; 22, outer wrapping layer; 23, inner wrapping layer; 24, buffer cavity; 25, composite layer; 251, glue hole; 3, elastic ball; 4, elastic column; 41, elastic cavity. Detailed implementation manners

[0024] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0025] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0026] It should be noted that when an element is referred to as "fixedly provided on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to an element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are only for illustrative purposes and do not represent the only implementation.

[0027] The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1: In combination with Figures 1-3 , this embodiment discloses a current polarity ratio test device, including a box body 1, on which a test module is provided. Specifically, the test module includes an output socket, an input socket, a knob, and a display screen on the opening panel of the box body 1; an output plug is inserted into the output socket, and a wire clamping mechanism electrically connected to the primary side bus inlet end of the current transformer is provided at the end of the output plug, and the primary side bus inlet end of the current transformer is grounded; an input plug is inserted into the input socket, and a chuck electrically connected to the secondary side terminal of the current transformer is provided at the end of the input plug; a box cover is hinged on the upper end of the box body 1; a variety of ports are provided on the display screen; a control mechanism is provided inside the box body 1; the control mechanism includes: a power supply circuit, an amplification circuit, a primary side acquisition circuit, a switching circuit, a photosensitive circuit, and a secondary side acquisition circuit. It is prior art, and its specific structure and working principle can be referred to Chinese Patent CN117192235B, which will not be elaborated here. Those skilled in the art can also select and implement from the prior art according to the actual operation situation.

[0029] In this embodiment, wrapping members 2 are provided at the four corners on the outer side of the box body 1, and the wrapping members 2 form an anti-collision structure for the box body 1.

[0030] The cross-sectional profile of the wrapping member 2 is an "L" - shaped structure. The wrapping member 2 includes a wear-resistant layer 21, an outer wrapping layer 22, and an inner wrapping layer 23 arranged in sequence from outside to inside. The wear-resistant layer 21, the outer wrapping layer 22, and the inner wrapping layer 23 are fixedly connected by gluing in sequence, and the inner side end of the inner wrapping layer 23 is glued to the outer corner of the box body 1.

[0031] A buffer cavity 24 is provided between the outer wrapping layer 22 and the inner wrapping layer 23. Specifically, the cross-sectional profile of the outer wrapping layer 22 is a "U" - shaped structure, and its concave side is close to the inner wrapping layer 23, and forms the buffer cavity 24 after combination. The buffer cavity 24 is a sealed chamber structure. It should be noted that Figure 2 is a partial cross-sectional view of the wrapping member 2. Actually, the cross-sectional profile of the buffer cavity 24 corresponds to the overall transverse profile of the wrapping member 2, both of which are in an "L" - shaped structure. Refer to Figure 3 shown.

[0032] Furthermore, the wear-resistant layer 21 is made of Acetal (POM), and the outer wrapping layer 22 and the inner wrapping layer 23 are made of PU, which makes the main structure of the wrapping piece 2 itself have a certain flexibility and the surface has better wear resistance.

[0033] Furthermore, a plurality of elastic balls 3 made of elastic material (rubber in this embodiment) are movably connected in the buffer cavity 24, and the elastic balls 3 can roll flexibly in the buffer cavity 24. Figure 3 As shown, when the box 1 tilts and falls, one of the outer corners is in a low position. During this process, the elastic balls 3 can quickly accumulate in the bottom area with the help of their own weight to form a force storage state. Then, when the corner of the box 1 collides with the floor, the bottom of the package 2 will apply an upward force to the inside. Most of this force will be absorbed by several elastic balls 3, converted into kinetic energy, and run toward the rest of the buffer cavity 24. Therefore, the impact of the collision on the box 1 is greatly weakened.

[0034] Example 2: Combination Figure 4 and Figure 5 As shown, a composite layer 25 is provided between the wear-resistant layer 21 and the outer wrapping layer 22 , and the composite layer 25 enables the inner end surface of the wear-resistant layer 21 to form a staggered end surface structure.

[0035] Furthermore, the composite layer 25 is made of PU material, which increases the contact area of ​​the connecting surface between the wear-resistant layer 21 and the outer wrapping layer 22, and enriches the hierarchical structure of the wrapping piece 2, so that the wrapping piece 2 can obtain a richer hierarchical differentiation and conduction effect when it is impacted or squeezed.

[0036] like Figure 5 As shown, the composite layer 25 is provided with a plurality of glue holes 251, which penetrate the composite layer 25 and are used to fill the composite glue. The glue holes 251 are circular through-hole structures, and the plurality of glue holes 251 are evenly distributed on the plane of the composite layer 25. The role of the glue holes 251 is to increase the filling space of the composite glue, thereby increasing the amount of glue used to improve the composite strength of the wear-resistant layer 21 and reduce the risk of the wear-resistant layer 21 falling off during use.

[0037] Embodiment 3: Based on Embodiment 2, Figure 6As shown, in this embodiment, the buffer cavity 24 is further provided with a plurality of elastic columns 4 made of an elastic material (rubber material in this embodiment). The two axial ends of the elastic column 4 are respectively connected to the outer wrapping layer 22 and the inner wrapping layer 23. The elastic telescopic direction of the elastic column 4 is parallel to its axis. The function of the elastic column 4 is to provide a supporting force in the inner and outer directions of the buffer cavity 24, helping the buffer cavity 24 to maintain the inner cavity width as much as possible after being slightly impacted and compressed, so as to ensure the stable movement of the elastic ball 3. Additionally, the elastic column 4 can also absorb part of the potential energy when the buffer cavity 24 is strongly impacted, playing an auxiliary buffering effect.

[0038] Furthermore, the elastic column 4 is composed of a plurality of axially connected hollow corrugated blocks, and adjacent corrugated blocks form a staggered corrugated structure in the radial direction, which is beneficial to improving its elastic performance and deformation flexibility, enabling it to twist and release energy in the radial direction after being longitudinally compressed.

[0039] Furthermore, an elastic cavity 41 is provided inside each corrugated block of the elastic column 4 to further improve its flexibility.

[0040] To improve the buffering effect, the axial length of the elastic column 4 in the natural extension state is greater than the diameter of the elastic ball 3, and the axial length of the elastic column 4 can be shorter than the diameter of the elastic ball 3 after being compressed. This enables the elastic column 4 and the elastic ball 3 to cooperate with each other to form the main multi-level buffering structure of the wrapping member 2.

[0041] In other embodiments, the elastic ball 3 can also adopt a hollow ball structure.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A current polarity ratio test device, comprising a box (1), on which a test module is provided, characterized in that: A wrapping piece (2) is provided at the corners of the outer side of the box body (1), and the cross-sectional profile of the wrapping piece (2) is an "L"-shaped structure. The wrapping piece (2) comprises a wear-resistant layer (21), an outer wrapping layer (22) and an inner wrapping layer (23) which are arranged in sequence from the outside to the inside. A buffer cavity (24) is provided between the outer wrapping layer (22) and the inner wrapping layer (23), and a plurality of elastic balls (3) made of elastic material are movably connected in the buffer cavity (24), and the elastic balls (3) can roll flexibly in the buffer cavity (24).

2. A current polarity ratio testing device according to claim 1, characterized in that: The wear-resistant layer (21), the outer wrapping layer (22) and the inner wrapping layer (23) are glued and connected in sequence, and the inner end of the inner wrapping layer (23) is glued and connected to the outer corner of the box body (1).

3. A current polarity ratio testing device according to claim 1, characterized in that: The cross-sectional profile of the outer wrapping layer (22) is a "U"-shaped structure, the concave side of which is close to the inner wrapping layer (23), and after compounding, forms the buffer cavity (24), and the buffer cavity (24) is a sealed chamber structure.

4. A current polarity ratio testing device according to claim 1, characterized in that: A composite layer (25) is provided between the wear-resistant layer (21) and the outer wrapping layer (22), and the composite layer (25) enables the inner end surface of the wear-resistant layer (21) to form a staggered end surface structure.

5. A current polarity ratio testing device according to claim 4, characterized in that: The composite layer (25) is provided with a plurality of glue holes (251), and the glue holes (251) penetrate the composite layer (25) and are used for filling composite glue.

6. A current polarity ratio testing device according to claim 5, characterized in that: The glue holes (251) are circular through-hole structures, and a plurality of glue holes (251) are evenly distributed on the plane of the composite layer (25).

7. A current polarity ratio testing device according to claim 1, characterized in that: The buffer cavity (24) is further provided with a plurality of elastic columns (4) made of elastic material. The axial ends of the elastic columns (4) are respectively connected to the outer wrapping layer (22) and the inner wrapping layer (23). The elastic expansion and contraction direction of the elastic columns (4) is parallel to the axial direction thereof.

8. A current polarity ratio testing device according to claim 7, characterized in that: The elastic column (4) is composed of a number of hollow fold blocks connected axially, and adjacent fold blocks form a staggered fold structure in the radial direction.

9. A current polarity ratio testing device according to claim 7 or 8, characterized in that: The axial length of the elastic column (4) is greater than the diameter of the elastic ball (3) in a naturally extended state, and the axial length of the elastic column (4) can be shorter than the diameter of the elastic ball (3) after being compressed.

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