Special inspection tool for detecting size of primary terminal of mutual inductor

Abstract

The utility model discloses a special inspection tool for detecting the size of a primary terminal of a mutual inductor, which belongs to the technical field of mutual inductors, M terminal holes are arranged on the end face of the primary terminal of the mutual inductor, the special inspection tool for detecting the size of the primary terminal of the mutual inductor comprises a cylindrical base, the upper surface of the base is provided with a measuring groove matched with the outer diameter of a primary terminal of a mutual inductor, M terminal hole measuring columns which are identical with terminal holes in number, position, depth and aperture size are arranged in the measuring groove, and M is a natural number larger than 0; according to the utility model, the special testing tool is arranged and comprises a cylindrical base, a measuring groove and a plurality of terminal hole measuring columns; the problems that in a traditional primary terminal size detection process, in order to guarantee qualification, a caliper needs to be manually used for measuring data one by one, the labor cost is high, the detection efficiency is low, meanwhile false detection is likely to happen, and the product percent of pass is low are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mutual inductors, and in particular relates to a special testing tool for detecting the size of a primary terminal of a mutual inductor. Background Art

[0002] As we all know, the primary terminal is the input end of the transformer, usually connected to the wire or cable of the current to be measured. When the current flows through the primary coil (main coil) of the transformer through the primary terminal, a corresponding magnetic field will be generated on the other side. The primary terminal has many different shapes and structures. During the production process of the transformer, the dimensions of the primary terminal need to be accurately measured to ensure that they meet the standards, otherwise it will affect the normal operation of the transformer and even cause safety accidents.

[0003] At present, in the traditional primary terminal size inspection process, in order to ensure the primary terminal size is qualified, it is necessary to manually measure the terminal outer diameter and the parameters of each terminal hole one by one with a caliper. When the number of inspections is large, the traditional technology has the following defects:

[0004] First, it requires a lot of manpower and material resources;

[0005] Second, the accuracy of the test is closely related to the operator's experience level, that is, different operators may have completely different test results for the same terminal hole;

[0006] 3. When the number of terminal holes is relatively large, the detection efficiency is relatively low. Utility Model Content

[0007] The utility model aims to provide a special testing tool for detecting the size of a transformer primary terminal, which can quickly and accurately detect the size of the transformer primary terminal, improve the detection efficiency, and ensure the accuracy of the detection result.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A special inspection tool for detecting the size of a transformer primary terminal, wherein the end face of the transformer primary terminal is provided with M terminal holes, and the special inspection tool for detecting the size of the transformer primary terminal comprises a base, wherein the base is cylindrical and is used to provide a stable support structure, so that the inspection tool is more secure during use; a measuring groove matching the outer diameter of the transformer primary terminal is provided on the upper surface of the base, so as to more easily achieve the accuracy of outer diameter measurement; M terminal hole measuring columns having exactly the same number, position, depth and aperture size as the terminal holes are provided in the measuring groove, so as to simultaneously detect several terminal holes of the transformer primary terminal, thereby helping to improve detection efficiency and reduce labor costs; M is a natural number greater than 0.

[0010] Preferably, the M terminal holes are evenly distributed on the same circumference, and the M terminal hole measuring columns are evenly distributed on the same circumference, so as to improve the convenience of plugging.

[0011] Preferably, the depths of the M terminal holes are the same, and the lengths of the M terminal hole measuring columns are the same, so as to accurately measure the heights of the terminal holes.

[0012] Preferably, the depths of the M terminal holes are not completely the same, and the lengths of the M terminal hole measuring columns are not completely the same, so as to accurately measure the heights of the terminal holes.

[0013] Preferably, the terminal hole measuring column and the base are an integrally formed structure, so as to improve the performance, stability and manufacturing efficiency of the testing tool.

[0014] Preferably, M bolt holes are provided in the measuring groove, and a protruding screw is provided at the bottom of the terminal hole measuring column; the terminal hole measuring column is fixed in the measuring groove of the base by the screw, and is used to change the number and position of the terminal hole measuring columns of the testing tool according to the number and position of the terminal holes to be tested, so as to make the testing tool more universal.

[0015] Preferably, the number of the terminal holes and the number of the terminal hole measuring columns are both eight.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model solves the problem that in the traditional primary terminal size detection process, in order to ensure qualification, each data needs to be measured one by one manually with a caliper, the labor cost is high, the detection efficiency is low, and false detection may occur, and the detection accuracy is low. The utility model comprises a cylindrical base for providing a stable support structure, so that the inspection tool is more firm during use; the utility model comprises a measuring groove arranged on the upper surface of the base and matched with the outer diameter of the primary terminal of the transformer, so as to more easily achieve the accuracy of the outer diameter size measurement; M (M is a natural number greater than 0) terminal hole measuring columns with the same number, position, depth and aperture size as the terminal holes are arranged in the measuring groove, so as to simultaneously detect a plurality of terminal holes of the primary terminal of the transformer, which helps to improve the detection efficiency and reduce the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a preferred embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the use status of a preferred embodiment of the utility model.

[0020] In the figure: 1. Base; 2. Measuring slot; 3. Terminal hole measuring column. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the utility model shall fall within the scope of protection of the utility model.

[0022] like Figure 1-Figure 2 As shown:

[0023] First embodiment: A special inspection tool for detecting the size of the primary terminal of a transformer. At present, in order to facilitate plugging, engineers often set a number of terminal holes on the end face of the primary terminal of the transformer during the design process. According to the design requirements of different products, the positions, outer diameters and depths of these terminal holes may be the same or different. In order to achieve rapid and accurate detection of the primary terminals, the present application adopts the following technical means: The special inspection tool for detecting the size of the primary terminal of the transformer includes a base 1. In order to provide a stable supporting structure and make the inspection tool more firm during use, the base 1 is cylindrical or square. In order to facilitate holding, the volume of the base 1 should not be too large or too small, such as a cylindrical shape with a diameter of 5cm to 10cm; in order to more conveniently achieve the accuracy of outer diameter measurement, a base 1 is provided on the upper surface of the base 1. The surface is provided with a measuring groove 2 matched with the outer diameter of the primary terminal of the transformer. The outer diameter of the primary terminal of the transformer can be detected by using the measuring groove 2. When the outer diameter of the primary terminal of the transformer is qualified, the outer diameter of the primary terminal of the transformer can be better inserted into the measuring groove 2. When the outer diameter of the primary terminal of the transformer is unqualified, the outer diameter of the primary terminal of the transformer cannot be inserted into the measuring groove 2 or can be inserted into the measuring groove 2, but can move in the measuring groove 2 along a direction perpendicular to the axis (the primary terminal of the transformer is cylindrical, and the axis here refers to the central axis of the primary terminal of the transformer); at the same time, it is also necessary to detect the number, position, depth and aperture size of the terminal holes. For this reason, in this embodiment, a number of terminal hole measuring columns 3 with the same number, position, depth and aperture size as the terminal holes are provided in the measuring groove 2; that is, there is a one-to-one correspondence between the terminal holes and the terminal hole measuring columns 3. The specific one-to-one correspondence includes the following aspects:

[0024] First, for the convenience of plugging, multiple terminal holes can be evenly distributed on the same circumference. At this time, multiple terminal hole measuring columns 3 are also synchronously and evenly distributed on the same circumference, and the sizes of the two circumferences are the same.

[0025] Second, for the convenience of plugging or processing, the depths of the plurality of terminal holes may be the same, and the lengths of the measuring columns 3 of the plurality of terminal holes may be the same.

[0026] 3. In order to avoid plugging errors, the depths of the multiple terminal holes may not be exactly the same, and the lengths of the measuring posts 3 of the multiple terminal holes may not be exactly the same.

[0027] Second embodiment: Based on the above first embodiment, in order to improve the stability and manufacturing efficiency of the test tool structure, the terminal hole measuring column 3 and the base 1 are an integrally formed structure.

[0028] The third embodiment: On the basis of the above-mentioned first embodiment, in order to meet the detection requirements of primary terminals of different types of transformers, that is, the terminal hole parameters of the primary terminals of each type of transformer are different, it is necessary to change the number and position of the terminal hole measuring columns 3 of the testing tool according to the number and position of the terminal holes to be tested, so that the testing tool is more universal. In this embodiment, a plurality of bolt holes are opened in the measuring groove 2, and the bottom of the terminal hole measuring column 3 is provided with raised screws of the same number, position and size; the terminal hole measuring column 3 is fixed in the measuring groove 2 of the base 1 by screws.

[0029] Fourth embodiment: Based on any of the above embodiments, the number of the terminal holes and the terminal hole measuring columns 3 may be eight.

[0030] In the utility model, in order to solve the problems that in the traditional primary terminal size detection process, in order to ensure the qualification, each data needs to be measured one by one by a caliper manually, and when the number of detections is large, a large amount of manpower and material resources are required; the accuracy of the detection is closely related to the experience level of the operator, that is, the detection results of the same terminal hole by different operators may be completely different; when the number of terminal holes is relatively large, the detection efficiency is relatively low, etc., a special inspection tool for primary terminal size detection is set; it includes a cylindrical base 1 for providing a stable support structure so that the inspection tool is more firm during use; it includes a measuring groove 2 arranged on the upper surface of the base 1 and matched with the outer diameter of the primary terminal of the transformer, which is used to more easily achieve the accuracy of the outer diameter size measurement; M (M is a natural number greater than 0) terminal hole measuring columns 3 with the same number, position, depth and aperture size as the terminal holes are arranged in the measuring groove 2, which are used to simultaneously detect a plurality of terminal holes of the primary terminal of the transformer, which helps to improve the detection efficiency and reduce the labor cost.

[0031] Working principle:

[0032] Step 1. According to the model parameters of the primary terminal of the transformer, select the special inspection tool corresponding to the primary terminal of the transformer: the end face of the primary terminal of the transformer to be inspected in the utility model is provided with M terminal holes. Before the inspection work starts, the operator selects the corresponding one-piece special inspection tool (Example 2) or the detachable inspection tool (Example 3) according to the number, position, depth and aperture of the terminal holes contained in the primary terminal to be inspected. When the detachable inspection tool is selected, it is first necessary to install the terminal hole measuring column 3 that completely matches the terminal hole in the measuring slot 2; after installation, execute the next step. When the one-piece special inspection tool is selected, directly execute the next step;

[0033] Step 2: Use a caliper to measure the compliance of the special inspection tool. Only when the inspection tool is qualified, the subsequent test results will be true and valid. When the inspection tool is qualified, proceed to the next step. Otherwise, replace the special inspection tool and repeat step 2.

[0034] Step 3: The operator aligns the terminal hole with the terminal hole measuring column 2, and the two are butted from both ends to the middle. It should be noted that the terminal hole and the terminal hole measuring column 2 need to be located on the same straight line during the butt connection, and there should be no angle.

[0035] Step 4: Start testing; specifically including:

[0036] First, check whether the outer diameter of the transformer primary terminal is qualified. After inserting the transformer primary terminal into the measuring slot 2, observe whether the measuring slot 2 and the outer diameter of the transformer primary terminal are tightly fitted. If the two are tightly fitted, it means that the outer diameter of the transformer primary terminal is qualified, otherwise it means that the outer diameter of the transformer primary terminal is unqualified; if the transformer primary terminal cannot be inserted into the measuring slot 2, it means that the outer diameter of the transformer primary terminal is unqualified;

[0037] When the outer diameter of the primary terminal of the transformer is qualified, the terminal hole is then checked to see if it is qualified. If any of the terminal hole measuring posts 3 cannot be inserted into the corresponding terminal hole, or after being inserted into the terminal hole, the terminal hole measuring posts 3 can have a shaking margin in the terminal hole in a direction perpendicular to the axis, it means that the terminal hole is unqualified; if all the terminal hole measuring posts 3 can be inserted into the corresponding terminal holes without shaking, it means that the terminal hole is qualified;

[0038] Step 5. Pull out the special testing tool and record the test results.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A special tester for detecting the size of a transformer primary terminal, wherein the end face of the transformer primary terminal is provided with M terminal holes, characterized in that: The special inspection tool for detecting the size of the transformer primary terminal comprises a base (1), the base (1) is cylindrical, a measuring groove (2) matching the outer diameter of the transformer primary terminal is arranged on the upper surface of the base (1), and M terminal hole measuring columns (3) having the same number, position, depth and aperture size as the terminal holes are arranged in the measuring groove (2), where M is a natural number greater than 0.

2. A special test tool for detecting the size of a transformer primary terminal according to claim 1, characterized in that: The M terminal holes are evenly distributed on the same circumference, and the M terminal hole measuring posts (3) are evenly distributed on the same circumference.

3. A special test tool for detecting the size of a transformer primary terminal according to claim 1, characterized in that: The depths of the M terminal holes are the same, and the lengths of the M terminal hole measuring columns (3) are the same.

4. A special test tool for detecting the size of a transformer primary terminal according to claim 1, characterized in that: The depths of the M terminal holes are not completely the same, and the lengths of the M terminal hole measuring columns (3) are not completely the same.

5. A special test tool for detecting the size of a transformer primary terminal according to claim 1, characterized in that: The terminal hole measuring column (3) and the base (1) are an integrally formed structure.

6. A special test tool for detecting the size of a transformer primary terminal according to claim 1, characterized in that: M bolt holes are provided in the measuring groove (2), and a protruding screw rod is provided at the bottom of the terminal hole measuring column (3); the terminal hole measuring column (3) is fixed in the measuring groove (2) of the base (1) by means of the screw rod.

7. A special test tool for detecting the size of a transformer primary terminal according to any one of claims 1 to 6, characterized in that: The number of the terminal holes and the terminal hole measuring columns (3) are both eight.

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