Anti-interference special test line

Abstract

The utility model discloses an anti-interference special test line, which comprises a test connector, a cascade lead and an instrument connector, one end of the test connector is connected with electrical equipment to be tested, the other end of the test connector is connected with one end of the cascade lead, the other end of the cascade lead is connected with one end of the instrument connector, and the other end of the instrument connector is connected with the test connector. The other end of the instrument connector is connected with a test instrument, the test wire is connected with electrical equipment to be tested through the test connector and connected with the test instrument through the instrument connector, the test connector and the instrument connector are connected through a cascade lead, and the test connector and the instrument connector are connected through a double-control aviation plug, so that the operation is simple and convenient; meanwhile, the problem that errors are increased due to the fact that conventional test wires are connected in series when the distance between test points is long is solved, the test connector, the cascade wire and the instrument connector are all wires with shielding layers, and the influence of electromagnetic interference on test results is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electrical testing technology, and in particular to a special anti-interference test line. Background Technology

[0002] When electrical equipment provides analog quantities for measurement and monitoring, it often uses DC transmitters to output 4-20mA analog data quantities to represent actual values, such as excitation voltage and excitation current provided by generator excitation systems, active power, reactive power and power factor provided by power transmitters, temperature provided by temperature sensing elements, and liquid level provided by liquid level measuring elements.

[0003] When conducting field tests, if electromagnetic shielding measures are not taken when introducing 4-20mA analog data into the test instrument, strong electromagnetic interference will cause waveform distortion, resulting in large deviations in the test data and thus affecting the test conclusions.

[0004] Currently, in practical work, conventional secondary test lines without shielding are used for the acquisition of 4-20mA analog data. These lines are highly susceptible to electromagnetic interference, which can lead to significant deviations in the test data and affect the test results.

[0005] A conventional secondary test line requires two wires to acquire a 4-20mA analog signal. If the measurement points are far apart, multiple test lines need to be connected in series to meet the testing requirements. However, multi-stage series connection of conventional secondary test lines will further increase the measurement error. As the number of measurement points and the test distance increase, if multiple measurement points need to be acquired simultaneously, a large number of test lines are required, leading to complicated wiring at the test site and increasing the time spent on test preparation and site setup. Utility Model Content

[0006] To overcome the above problems, the purpose of this utility model is to provide a special anti-interference test cable. This test cable connects to the electrical equipment under test through a test connector and to the test instrument through an instrument connector. The test connector and the instrument connector are connected by cascaded wires, and the connection between them is made using a double-control aviation plug. The operation is simple and convenient, and at the same time, it avoids the problem of increased error caused by series connection of conventional test cables when the test points are far apart. In addition, the test connector, cascaded wires, and instrument connectors all use shielded wires to avoid the influence of electromagnetic interference on the test results.

[0007] The technical solution adopted in this utility model is:

[0008] An anti-interference dedicated test lead includes a test connector, a cascaded wire, and an instrument connector. One end of the test connector is connected to the electrical equipment to be tested, and the other end is connected to one end of the cascaded wire. The other end of the cascaded wire is connected to one end of the instrument connector, and the other end of the instrument connector is connected to a test instrument.

[0009] The test connector consists of a positive test signal plug, a negative test signal plug, and an integrated test wire. The positive and negative test signal plugs are single-core shielded wires, and the integrated test wire is a double-core shielded wire.

[0010] The cascaded conductor is a dual-core shielded conductor.

[0011] The instrument connector consists of an instrument signal positive plug, an instrument signal negative plug, a shielded grounding plug, and an integrated instrument wire. The instrument signal positive plug and the instrument signal negative plug are single-core shielded wires, the shielded grounding plug is a plug with the shielded conductor leading out, and the integrated instrument wire is a double-core shielded wire.

[0012] As a further description of this utility model, the cascaded wires are multiple in number, and can be used individually in series with the test connector and the instrument connector, or multiple wires can be connected in series and then connected in series with the test connector and the instrument connector.

[0013] As a further description of this utility model, the test connector and the cascaded wires, as well as the cascaded wires and the instrument connector, are connected using a two-hole aviation plug.

[0014] As a further description of this utility model, the dual-hole aviation plug includes an aviation plug male head, an aviation plug female head, and a fastening ring. The aviation plug male head is adapted to the aviation plug female head. The outer side of the aviation plug male head has a threaded structure, and the inner side of the fastening ring has a threaded structure. The inner thread of the fastening ring is adapted to the outer thread of the aviation plug male head.

[0015] As a further description of this utility model, the core of the integrated test lead, cascaded lead, and integrated instrument lead are all 1.5mm². 2 The conductor is made of multi-strand soft copper wire with a rubber outer sheath.

[0016] As a further description of this utility model, the insulating parts of the test signal positive plug and the instrument signal positive plug are red, and the insulating parts of the test signal negative plug and the instrument signal negative plug are black.

[0017] As a further description of this utility model, the ends of the test signal positive plug and the test signal negative plug of the test connector are metal plugs, which can be directly inserted into the test terminals of the electrical equipment to be tested, and can also be used as pins, inserts, and insulating clamps.

[0018] As a further description of this utility model, the ends of the instrument signal positive plug, instrument signal negative plug, and shielding layer grounding plug of the instrument connector are all metal plugs, which can be directly inserted into the test instrument, or can be used for pins, inserts, and insulating clamps.

[0019] The beneficial effects of this utility model are:

[0020] This utility model discloses a special anti-interference test lead, comprising a test connector, cascaded wires, and an instrument connector. The test lead connects to the electrical equipment under test via the test connector and to the testing instrument via the instrument connector. The test connector and the instrument connector are connected via cascaded wires, and the connections between them are made using a dual-control aviation plug. This design is simple and convenient to operate, and avoids the increased error caused by series connection of conventional test leads when the test points are far apart.

[0021] This utility model discloses a special anti-interference test cable. The test connector's positive and negative test signal plugs are single-core shielded wires, the integrated test cable is a double-core shielded wire, and the cascaded cable is a double-core shielded wire. The instrument connector's positive and negative instrument signal plugs are single-core shielded wires, the shielded grounding plug is a plug with a shielded conductor leading out, and the integrated instrument cable is a double-core shielded wire. The test connector, cascaded cable, and instrument connector all use shielded wires to avoid the influence of electromagnetic interference on the test results and improve the accuracy of the test results.

[0022] This utility model discloses a special anti-interference test lead, which includes multiple cascaded wires. Each wire can be used individually in series with a test connector and an instrument connector, or multiple wires can be connected in series before being connected to the test connector and an instrument connector. During the test, the number of cascaded wires required to be connected in series is estimated based on the distance between the measuring instrument and the data acquisition point, and then the wires are connected. This design is suitable for different test conditions and has a wide range of applications.

[0023] This utility model discloses a dedicated anti-interference test lead. The test connector and cascaded wires, as well as the cascaded wires and instrument connectors, are connected using dual-hole aviation plugs. Each dual-hole aviation plug includes a male aviation plug, a female aviation plug, and a retaining ring. The male aviation plug is installed at one end of the test connector, the female aviation plug at the end of the cascaded wire connected to the test connector, and the male aviation plug at the other end of the cascaded wire. The female aviation plug is installed at the end of the instrument connector connected to the cascaded wire. A retaining ring is then used to secure the connection between the male and female aviation plugs. This ensures a reliable and effective connection between the dedicated anti-interference test leads. Furthermore, the connection between these dedicated anti-interference test leads is simple and convenient, facilitating operation at the testing site and improving work efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a special anti-interference test line proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of each part of the anti-interference special test line proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of a dual-hole aviation plug structure for an anti-interference dedicated test line proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of an aviation plug female of a special anti-interference test line proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the male connector structure of an aviation plug for a special anti-interference test line proposed in this utility model;

[0029] Figure 6 This is a schematic diagram of the cross-sectional structure of a cascaded conductor for an anti-interference test lead proposed in this utility model.

[0030] Explanation of reference numerals in the attached figures

[0031] 1-Test connector,

[0032] 11-Test signal positive connector, 12-Test signal negative connector, 13-Test integrated lead wire.

[0033] 2-Cascaded wires,

[0034] 21-Conductor, 22-Insulation layer, 23-Shielding layer, 24-Wire sheath,

[0035] 3-Instrument connector,

[0036] 31-Instrument signal positive plug, 32-Instrument signal negative plug, 33-Shielding grounding plug, 34-Instrument integrated cable.

[0037] 4-Dual-pin aviation connector,

[0038] 41-Male aviation connector, 42-Female aviation connector, 43-Retaining ring. Detailed Implementation

[0039] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0040] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0041] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0042] like Figures 1-6 As shown, it illustrates a specific embodiment of this utility model:

[0043] Example 1

[0044] This utility model discloses a special anti-interference test line, including a test connector 1, a cascaded wire 2, and an instrument connector 3. One end of the test connector 1 is connected to the electrical equipment to be tested, and the other end is connected to one end of the cascaded wire 2. The other end of the cascaded wire 2 is connected to one end of the instrument connector 3, and the other end of the instrument connector 3 is connected to a test instrument.

[0045] Specifically, the test connector 1 and the cascade wire 2, and the cascade wire 2 and the instrument connector 3 are connected by a two-hole aviation plug 4.

[0046] In this embodiment, as Figure 1 As shown, the test lead connects to the electrical equipment under test via test connector 1 and to the testing instrument via instrument connector 3. Test connector 1 and instrument connector 3 are connected via cascaded wires 2, and the connections between them are made using a double-control aviation plug 4. This design is simple and convenient to operate, and avoids the increased error caused by series connection of conventional test leads when the test points are far apart.

[0047] The test connector 1 consists of a test signal positive plug 11, a test signal negative plug 12, and a test integrated wire 13. The test signal positive plug 11 and the test signal negative plug 12 are single-core shielded wires, and the test integrated wire 13 is a double-core shielded wire.

[0048] The cascaded conductor 2 is a double-core shielded conductor;

[0049] The instrument connector 3 consists of an instrument signal positive plug 31, an instrument signal negative plug 32, a shielded grounding plug 33, and an integrated instrument wire 34. The instrument signal positive plug 31 and the instrument signal negative plug 32 are single-core shielded wires, the shielded grounding plug 33 is a plug with the shielded conductor leading out, and the integrated instrument wire 34 is a double-core shielded wire.

[0050] In this embodiment, as Figure 1 , Figure 2As shown, the test signal positive plug 11 and test signal negative plug 12 of the test connector 1 are single-core shielded wires, the integrated test wire 13 is a double-core shielded wire, the cascaded wire 2 is a double-core shielded wire, the instrument signal positive plug 31 and instrument signal negative plug 32 of the instrument connector 3 are single-core shielded wires, the shielded ground plug 33 is a plug with the shielded conductor leading out, and the integrated instrument wire 34 is a double-core shielded wire. The test connector 1, cascaded wire 2, and instrument connector 3 of this test line all use shielded wires to avoid the influence of electromagnetic interference on the test results and improve the accuracy of the test results.

[0051] Specifically, the cores of the integrated test lead 13, the cascaded lead 2, and the integrated instrument lead 34 are all 1.5mm². 2 The conductor is made of multi-strand soft copper wire with a rubber outer sheath.

[0052] In this embodiment, as Figure 6 The diagram shows a cross-sectional view of the cascaded conductor 2 of the test lead. It is a double-core conductor with a shielded layer. The conductor 21 is inside the insulation layer 22, and each conductor 21 has an insulation layer on the outside. A shielding layer 23 is provided outside the insulation layer 22. If there are multiple conductors, they are all arranged inside the shielding layer 23. In this embodiment, the test signal positive plug 11, test signal negative plug 12, instrument signal positive plug 31, and instrument signal negative plug 32 each have a conductor 21 inside the shielding layer 23. The outside of the shielding layer 23 is a conductor sheath 24, which uses a rubber outer sheath to ensure the accuracy of the test results.

[0053] Example 2

[0054] Based on the above embodiment one, in order to enable the anti-interference test line to be applied to more application scenarios, this embodiment two is proposed.

[0055] Specifically, there are multiple cascaded wires 2. They can be used individually in series with test connector 1 and instrument connector 3, or multiple wires can be connected in series and then connected in series with test connector 1 and instrument connector 3.

[0056] In this embodiment, during the test, the number of cascaded wires required for series connection is estimated based on the distance between the measuring instrument and the data acquisition point, and then the connection is made. This method is applicable to different test situations and has a wide range of applications.

[0057] Example 3

[0058] Specifically, the dual-hole aviation connector 4 includes an aviation connector male 41, an aviation connector female 42, and a fastening ring 43. The aviation connector male 41 is adapted to the aviation connector female 42. The outer side of the aviation connector male 41 has a threaded structure, and the inner side of the fastening ring 43 has a threaded structure. The inner thread of the fastening ring 43 is adapted to the outer thread of the aviation connector male 41.

[0059] In this embodiment, as Figure 3 , Figure 4 , Figure 5 As shown, when installing using the dual-hole aviation connector 4, install the aviation connector male 41 at one end of the test connector 1, install the aviation connector female 42 at one end of the cascade wire 2 connected to the test connector 1, install the aviation connector male 41 at the other end of the cascade wire 2, and install the aviation connector female 42 at one end of the instrument connector 3 connected to the cascade wire 2. Then, use a fastening ring 43 to fix the connection between the aviation connector female 42 and the aviation connector male 41. This ensures a reliable and effective connection between the anti-interference test lines. At the same time, the connection between the anti-interference test lines is simple and convenient, making it easy to operate at the test site and improving work efficiency.

[0060] Example 4

[0061] Specifically, the insulating parts of the test signal positive plug 11 and the instrument signal positive plug 31 are red, while the insulating parts of the test signal negative plug 12 and the instrument signal negative plug 32 are black.

[0062] In this embodiment, the positive and negative plugs of the test connector 1 and the signal connector 3 are distinguished by red and black, which can clearly distinguish the positive and negative poles, and quickly complete the test during the testing phase, thus improving work efficiency.

[0063] Specifically, the test signal positive plug 11 and test signal negative plug 12 of the test connector 1 are metal plugs that can be directly inserted into the test terminals of the electrical equipment to be tested, and can also be used as pins, inserts, and insulating clamps.

[0064] Specifically, the ends of the instrument signal positive plug 31, instrument signal negative plug 32, and shielding ground plug 33 of the instrument connector 3 are all metal plugs, which can be directly inserted into the test instrument, or used for pins, inserts, and insulating clamps.

[0065] In this embodiment, the positive and negative plugs of the test connector 1 and the positive and negative plugs and shielding plug of the instrument connector 3 are all metal plugs, which can be directly inserted for use. They are also suitable for pins, inserts, and insulating clamps, and have a wide range of applications.

[0066] In summary, the specific usage and function of this utility model are as follows:

[0067] In use, this invention first requires estimating the number of cascaded wires 2 needed based on the distance between the measuring instrument and the data acquisition point. Then, the male and female aviation plugs 41 and 42 of the double-hole aviation plug 4 are used to connect the various parts and are secured with fastening rings 43. Finally, the positive and negative terminals of the test connector 1 are inserted into the data acquisition position of the electrical equipment to be tested, and the positive and negative terminals of the instrument connector 3 and the shielded plug are inserted into the testing instrument for testing. This invention avoids the influence of electromagnetic interference on the test results by using shielded wires, thus improving the accuracy of the test results.

[0068] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0069] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A special anti-interference test lead, characterized in that, It includes a test connector (1), a cascade wire (2), and an instrument connector (3). One end of the test connector (1) is connected to the electrical equipment to be tested, and the other end is connected to one end of the cascade wire (2). The other end of the cascade wire (2) is connected to one end of the instrument connector (3), and the other end of the instrument connector (3) is connected to the test instrument. The test connector (1) consists of a positive test signal plug (11), a negative test signal plug (12), and an integrated test wire (13). The positive test signal plug (11) and the negative test signal plug (12) are single-core shielded wires, and the integrated test wire (13) is a double-core shielded wire. The cascaded conductor (2) is a double-core conductor with a shielding layer; The instrument connector (3) consists of an instrument signal positive plug (31), an instrument signal negative plug (32), a shielding layer grounding plug (33), and an instrument integrated wire (34). The instrument signal positive plug (31) and the instrument signal negative plug (32) are single-core shielded wires. The shielding layer grounding plug (33) is a plug with a shielding layer conductor leading out. The instrument integrated wire (34) is a double-core shielded wire.

2. The anti-interference dedicated test line according to claim 1, characterized in that, The cascaded wires (2) have multiple strands, which can be connected in series, either individually or in multiples, and then connected in series with the test connector (1) and the instrument connector (3).

3. The anti-interference dedicated test line according to claim 1, characterized in that, The test connector (1) and the cascade wire (2) are connected by a two-hole aviation plug (4), and the cascade wire (2) and the instrument connector (3) are connected by a two-hole aviation plug (4).

4. The anti-interference dedicated test line according to claim 3, characterized in that, The dual-hole aviation connector (4) includes an aviation connector male (41), an aviation connector female (42), and a fastening ring (43). The aviation connector male (41) is compatible with the aviation connector female (42). The outer side of the aviation connector male (41) is threaded, and the inner side of the fastening ring (43) is threaded. The inner thread of the fastening ring (43) is compatible with the outer thread of the aviation connector male (41).

5. The anti-interference dedicated test lead according to claim 1, characterized in that, The cores of the integrated test lead (13), cascaded lead (2), and integrated instrument lead (34) are all 1.5mm thick. 2 The conductor is made of multi-strand soft copper wire with a rubber outer sheath.

6. The anti-interference dedicated test lead according to claim 1, characterized in that, The insulating parts of the positive test signal plug (11) and the positive instrument signal plug (31) are red, while the insulating parts of the negative test signal plug (12) and the negative instrument signal plug (32) are black.

7. The anti-interference dedicated test lead according to claim 1, characterized in that, The test connector (1) has metal plugs at the ends of the positive test signal plug (11) and the negative test signal plug (12), which can be directly inserted into the test terminals of the electrical equipment to be tested, and can also be used for pins, inserts, and insulating clamps.

8. The anti-interference dedicated test lead according to claim 1, characterized in that, The instrument signal positive plug (31), instrument signal negative plug (32), and shielding layer grounding plug (33) of the instrument connector (3) are all made of metal plugs, which can be directly inserted into the test instrument, and can also be used for pins, inserts, and insulating clamps.

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