Special tool for insulation test of electric tool
By designing a special tool for insulation tests that combines test bags and vacuum pumping, the problem of difficulty in the existing technology is solved in the existing technology that it is difficult to comprehensively detect the insulation performance of the electrical electrical appliances, and the high -precision, fast insulation test is achieved, and the safety is improved. Management and detection efficiency.
Patent Information
- Application Number
- CN202420690366.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-07
AI Technical Summary
The prior art is difficult to comprehensively and accurately detect the insulation performance of electric tooling, especially on tools with complex appearance or irregular surfaces, which may lead to missed inspection of insulation defects, affecting safe use and life prediction.
Design a special tool for insulation testing of electric tools, adopts the structure of test bags and portable boxes, combined with vacuum air pumping methods to ensure that the test bag is closely fitted with a large area of the equipment appliance, thereby achieving a comprehensive and high -precision insulation test.
Through the use of the work, the accuracy and authenticity of the insulation performance detection significantly improved the accuracy and authenticity of the insulation performance, ensured a comprehensive assessment of the insulation status of the electric equipment, and improved the level of safety management and detection efficiency.
Smart Images
Figure CN222420428U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electric tool auxiliary, is applied in the insulation test process of electric tools, and specifically is a special tool for insulation test of electric tools. Background Art
[0002] In modern industrial production and maintenance operations, electric tools are widely used because of their efficiency and convenience. However, it is crucial to ensure the safety and reliability of electric tools during use, which largely depends on the quality of their electrical insulation. Insulation testing is a key step in the inspection process of electric tools. It aims to detect and evaluate the insulation resistance between the conductive parts and the non-conductive casing of the tool, thereby revealing the potential risks of safety accidents caused by insulation damage, aging or moisture.
[0003] In traditional electric tool insulation testing methods, temporary means are usually used, such as wrapping a bare copper wire around the tool housing to form a ground loop, and using an insulating megohmmeter to measure the insulation resistance between the conductive part inside the tool and the external metal housing. The obvious limitation of this method is that the bare copper wire cannot achieve full and uniform contact with the tool housing, especially on electric tools with complex shapes or irregular surfaces, it is difficult to ensure the validity and accuracy of the measurement results, which may lead to missed detection of insulation defects, thereby affecting the safe use and life prediction of electric tools.
[0004] Another existing technical solution is to use a specially designed insulating box structure filled with flexible conductive sponge to ensure multi-point contact with the tool housing, thereby obtaining an insulation resistance value closer to the actual value. Although this method is an improvement over the bare copper wire winding, it still has significant disadvantages, such as the large size and weight of the equipment, which is not easy to carry and operate quickly on site. In addition, when facing electric tools with complex structures, rich details or many curved surfaces, the flexible conductive sponge may not fit all contact areas tightly, resulting in the insulation status of some areas cannot be effectively detected.
[0005] In view of the shortcomings of the above-mentioned traditional insulation testing methods, there is an urgent need to develop a new technical solution that is more accurate, portable, adaptable and can comprehensively and effectively detect the insulation performance of various parts of electric tools to meet the ever-increasing safety requirements and increasingly complex industrial application scenarios. Utility Model Content
[0006] Based on the current status of the background technology, the purpose of the utility model is to solve the problem that the prior art cannot fully detect all contact areas of electric tools. Therefore, a special tool for insulation testing of electric tools is proposed; through the structure of the test bag and the portable box, combined with the vacuum pumping method, all-round, high-precision, fast and reliable detection of the insulation condition of electric tools is achieved, thereby fundamentally improving the safety management level and detection efficiency of electric tools.
[0007] The utility model adopts the following technical solutions to achieve the purpose:
[0008] A special tool for insulation testing of electric tools, the tool comprising a test bag, an air pump and a test instrument; the electric tool is placed in the test bag, the test bag is made of conductive non-woven fabric, and the test bag is provided with a self-sealing port, an air suction port and a test port; the self-sealing port is adhesively connected to the test bag and serves as the opening and closing port of the test bag, and when the self-sealing port is closed, a closed space is formed inside the test bag; the air suction port is connected to the air suction pump; the test port is connected to the electric tool on one side inside the test bag, and the test port is respectively connected to the bag body of the test bag and the test instrument on the side outside the test bag.
[0009] Preferably, the tooling also includes a portable box, in which the test bag is placed and the vacuum pump is installed.
[0010] Specifically, the test port is provided with a five-hole socket on the surface of one side inside the test bag, and the electric tool is connected to the five-hole socket through a power cord plug; the test port is provided with six sets of leads on the surface of one side outside the test bag, one set of the leads is connected to the bag body of the test bag through a bag body connection line provided on the test port, and the remaining five sets of leads are respectively connected to the respective holes of the five-hole socket. The six sets of leads are connected to the test instrument in pairs, so as to complete the required insulation test items.
[0011] In summary, due to the adoption of this technical solution, the beneficial effects of the utility model are as follows:
[0012] 1. The special tooling of the utility model completely encapsulates the electric tool in a special test bag and ensures that the bag and the tool fit closely over a large area, so that the overall insulation condition of the tool can be fully and truly reflected during the insulation performance test. Compared with the traditional local or point contact test method, the test environment provided by the utility model is closer to the actual use, thereby significantly improving the authenticity and accuracy of the test results.
[0013] 2. The test bag of the utility model is made of soft and thin materials. This design enables an ideal fit and seal effect to be achieved during the vacuuming process even if the pressure difference between the inside and outside of the bag is relatively low, thus reducing the pressure requirement for the vacuum pump. At the same time, the bag mouth adopts a convenient and efficient self-sealing design for the entry and exit of tools, and the connection between the test port and the vacuum port and the bag body also uses a plastic sealing process, so that the entire tooling has good sealing properties, effectively ensuring the safety and stability of the test process.
[0014] Therefore, the utility model has the advantages of improving test accuracy and simplifying structural processes, and has good practical and innovative significance for improving the efficiency of insulation quality detection of electric tools. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0016] The meanings of the symbols in the accompanying drawings are as follows:
[0017] 1-test bag, 2-vacuum pump, 3-test instrument, 4-self-sealing port, 5-vacuum port, 6-test port, 7-portable box, 8-handle, 9-hose, 10-lead, 11-bag body connecting line. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0020] Example
[0021] like Figure 1As shown, a special tool for insulation test of electric tools, the tool comprises a test bag 1, an air pump 2 and a test instrument 3; the electric tools are placed in the test bag 1, the test bag 1 is made of conductive non-woven fabric, and the test bag 1 is provided with a self-sealing port 4, an air suction port 5 and a test port 6; the self-sealing port 4 is glued to the test bag 1 and serves as the opening and closing port of the test bag 1. When the self-sealing port 4 is closed, a closed space is formed inside the test bag 1; the air suction port 5 is connected to the air pump 2; the test port 6 is connected to the electric tools on one side inside the test bag 1, and is respectively connected to the bag body of the test bag 1 and the test instrument 3 on the outside of the test bag 1.
[0022] In this embodiment, Figure 1 As shown, the tooling also includes a portable box 7, in which a test bag 1 is placed and an air pump 2 is installed. The air pump 2 can be designed in a miniaturized and modular manner; handles 8 are provided on both sides of the portable box 7 to facilitate the tester to move it. In addition, the internal space of the portable box 7 can also be used to store relevant components required for the entire insulation test, such as the test instrument 3 and various connecting cables, etc., to facilitate flexible access and management in practical applications.
[0023] In this embodiment, the surface resistivity of the conductive non-woven fabric ranges from 0.03 to 0.08Ω / Sq, and the thickness is less than 0.5mm; the bag formed by the conductive non-woven fabric will fit tightly to the outer shell surface of the electric tool during the insulation test, achieving a more comprehensive contact area.
[0024] As for the specific structure of each component on the test bag 1, the self-sealing opening 4 is made of polyethylene, and the self-sealing opening 4 is glued to the test bag 1 through a plastic gluing process. Before and after the insulation test, the electric tools are put in and taken out through the self-sealing opening 4. The self-sealing opening 4 is provided with mutually matching racks, and the racks are pressed and separated to realize the opening and closing of the self-sealing opening 4; the related structure of the self-sealing opening can also adopt other existing structures, and it is only necessary to ensure that when it is closed, the internal space of the test bag 1 is sealed to meet the pressure difference formed by the air extraction so that the bag body fits the surface of the tool.
[0025] In this embodiment, the air extraction port 5 is a metal tube, which is connected to the air extraction pump 2 through a detachable hose 9; one end of the metal tube protrudes out of the test bag 1 by a preset distance, for example, 2 cm is more suitable; the other end of the metal tube is glued to the bag body of the test bag 1 to communicate with the bag space of the test bag 1. In the process of connecting the metal tube to the test bag 1, the metal tube can be first fixed to the corresponding opening of the test bag 1, and then the part located in the bag can be cut off to prevent the metal tube in the bag from scratching the electric tool or causing inconvenience in the test.
[0026] In the device connection part of the insulation test, in this embodiment, the test port 6 is provided with a five-hole socket on the surface of one side inside the test bag 1, and the electric tool is connected to the five-hole socket through the power cord plug. The form of the five-hole socket enables the power cord plug of the electric tool to obtain a stable matching connection effect regardless of whether it is a two-hole or a three-hole.
[0027] The test port 6 is provided with six groups of leads 10 on the surface of one side outside the test bag 1, one group of leads 10 is connected to the bag body of the test bag 1 through the bag body connecting line 11 provided on the test port 6, and this group of leads 10 will mainly involve insulation tests related to the outer shell of the electric tool; the remaining five groups of leads 10 are respectively connected to the wiring points of each hole position of the five-hole socket, which can test the insulation effect between the power supply end and the outer shell of the electric tool, and can also test the insulation effect between the power supply ends. Therefore, the six groups of leads 10 are connected to the test instrument 3 in the form of two-by-two combinations. For the insulation test, the test instrument 3 used is an insulation megohmmeter.
[0028] When the tool is used based on the above structure, first put the electric tool into the test bag 1, plug its power cord into the five-hole socket, and then press and seal the test bag 1 through the self-sealing mouth 4; after connecting the air extraction port 5 and the air pump 2 with a hose 9, start the air pump 2, and the test bag 1 will produce an internal and external pressure difference due to the air extraction, and gradually fit the outer surface of the electric tool therein. When the fit has reached the standard for testing, the air pump 2 can be turned off, and according to the requirements of the test project, two or two of the six groups of leads led out of the outside of the test port are selected, and the test is carried out through an insulating megohmmeter. Since the bag body of the test bag 1 is made of conductive non-woven fabric and is very thin, the requirements for the internal and external pressure difference of the bag body do not need to be too strict under the condition of meeting the electrical requirements of the insulation test, and the expected insulation test effect can be obtained.
Claims
1. A special tool for insulation test of electric tools, characterized by: The tooling comprises a test bag (1), an air pump (2) and a test instrument (3); an electric tool is placed in the test bag (1), the test bag (1) is made of conductive non-woven fabric, and the test bag (1) is provided with a self-sealing opening (4), an air suction opening (5) and a test port (6); the self-sealing opening (4) is glued to the test bag (1) and serves as the opening and closing opening of the test bag (1); when the self-sealing opening (4) is closed, a closed space is formed inside the test bag (1); the air suction opening (5) is connected to the air pump (2); the test port (6) is connected to the electric tool on one side inside the test bag (1), and is connected to the bag body of the test bag (1) and the test instrument (3) on one side outside the test bag (1).
2. The special tool for insulation test of electric tools according to claim 1, characterized in that: The tooling also includes a portable box (7), in which the test bag (1) is placed and the vacuum pump (2) is installed.
3. The special tool for insulation test of electric tools according to claim 2, characterized in that: Handles (8) are provided on both sides of the portable box (7).
4. The special tool for insulation test of electric tools according to claim 1, characterized in that: The surface resistivity of the conductive non-woven fabric is in the range of 0.03 to 0.08 Ω / Sq; and the thickness of the conductive non-woven fabric is less than 0.5 mm.
5. The special tool for insulation test of electric tools according to claim 1, characterized in that: The self-sealing opening (4) is made of polyethylene, and the self-sealing opening (4) is glued to the test bag (1) through a plastic gluing process.
6. The special tool for insulation test of electric tools according to claim 5, characterized in that: The self-sealing opening (4) is provided with mutually matching racks, and the racks are used to open and close the self-sealing opening (4) by pressing and separating.
7. The special tool for insulation test of electric tools according to claim 1, characterized in that: The air extraction port (5) is a metal tube, which is connected to the air extraction pump (2) via a detachable hose (9); one end of the metal tube protrudes out of the test bag (1) by a preset distance, and the other end is glued to the bag body of the test bag (1) to communicate with the space inside the test bag (1).
8. The special tool for insulation test of electric tools according to claim 1, characterized in that: The test port (6) is provided with a five-hole socket on the surface of one side inside the test bag (1), and the electric tool is connected to the five-hole socket via a power cord plug; the test port (6) is provided with six groups of leads (10) on the surface of one side outside the test bag (1), one group of the leads (10) is connected to the bag body of the test bag (1) via a bag body connecting line (11) provided on the test port (6), and the remaining five groups of the leads (10) are respectively connected to the wiring points of the various holes of the five-hole socket.
9. The special tool for insulation test of electric tools according to claim 8, characterized in that: The six groups of lead wires (10) are connected to the test instrument (3) in pairs.
10. The special tool for insulation test of electric tools according to claim 9, characterized in that: The test instrument (3) is an insulating megohmmeter.