A monitoring type porcelain insulator zero value detection device and test system

Abstract

The utility model relates to insulator detection technical field discloses a kind of supervision type porcelain insulator zero detection equipment and test system, and detection equipment includes: testing device and contact device, testing device includes two high voltage signal delivery terminals, contact device includes two flexible test lines, two rigid test contacts, support rod, the first end of two flexible test lines is connected with two high voltage signal delivery terminals respectively, the second end of two flexible test lines is connected with the first end of two rigid test contacts respectively, two flexible test lines are all fixed on support rod, the first end of two rigid test contacts is respectively fixed in the first end end of support rod, respectively for and the contact of the iron cap of insulator both ends, the second end end of support rod is used to be held. The embodiment can be directly contacted by hand holding support rod, two rigid test contacts and the iron cap of insulator both ends, improve the contact efficiency of contact device and insulator.

Description

Technical Field

[0001] This utility model relates to the field of insulator testing technology, and in particular to a supervised zero-value testing device and testing system for porcelain insulators. Background Technology

[0002] In power systems, insulators play a crucial role in ensuring the safe and stable operation of transmission lines. Among them, porcelain insulators are widely used in transmission lines of all voltage levels due to their excellent electrical insulation properties, mechanical strength, and anti-aging characteristics. However, porcelain insulators face complex and harsh working environments during long-term operation.

[0003] From an electrical perspective, the continuous exposure to high voltage results in a complex electric field distribution within the porcelain insulator, making it prone to partial discharge. Simultaneously, transient overvoltages such as lightning strikes and switching overvoltages pose a severe test to its insulation performance. In terms of mechanical load, it must withstand the weight of the conductor itself, as well as the tensile, compressive, and torsional forces generated by wind and icing. Furthermore, due to factors such as temperature variations, humidity fluctuations, and pollution corrosion in the operating environment, the performance of porcelain insulators gradually deteriorates, leading to a reduction in insulation performance in some insulators, and even the emergence of insulators with zero insulation value.

[0004] Currently, there are numerous methods for detecting zero-value insulators. Common methods include the insulation resistance method, which measures the insulation resistance of the insulator to determine if a zero-value condition exists. However, the maximum output voltage of insulation resistance testers is 5000V, while porcelain insulators withstand voltages of 20-30kV during operation. Using insulation resistance for this purpose can lead to false positives and false negatives, severely impacting the reliability of the power supply system. The leakage current method assesses insulation performance based on the magnitude of the leakage current on the insulator's surface. However, environmental factors such as pollution and humidity can significantly interfere with the leakage current, greatly reducing the accuracy of the test results. Infrared thermometry and infrared imaging methods utilize the temperature difference generated by the heat generated by the zero-value insulator during operation. However, the difference between the normal surface temperature of a porcelain insulator and the surface temperature of a deteriorated insulator is not significant enough, and the test results are affected by the environment. In actual testing, it is difficult to accurately distinguish between normal and zero-value insulators, resulting in a high false positive rate. In addition, there is the spark gap method, which determines whether the insulator is deteriorated by observing whether the spark gap on the test rod breaks down. However, the air discharge gap is affected by the ambient temperature and humidity, which can easily lead to inaccurate testing.

[0005] Existing patent document CN212622901U discloses a device for detecting the internal insulation degradation of porcelain insulators. It determines whether there is a zero value by measuring the voltage of the insulator, replacing the above method. However, it connects to the insulator with a flexible test rod, which has the problem of low connection efficiency, resulting in low detection efficiency of the device. Utility Model Content

[0006] This utility model discloses a supervisory porcelain insulator zero-value detection device and testing system, which solves the problem of low detection efficiency caused by the low connection efficiency of the flexible test rod connected to the insulator in the prior art.

[0007] This utility model provides a supervisory porcelain insulator zero-value detection device, comprising: a testing device and a contact device. The testing device includes two high-voltage signal transmission terminals. The contact device includes two flexible test wires, two rigid test contacts, and a support rod. The first ends of the two flexible test wires are respectively connected to the two high-voltage signal transmission terminals, and the second ends of the two flexible test wires are respectively connected to the first ends of the two rigid test contacts. Both flexible test wires are fixed on the support rod. The first ends of the two rigid test contacts are respectively fixed to the first end of the support rod. The second ends of the two rigid test contacts are respectively used to contact the iron caps at both ends of the insulator. The second end of the support rod is used to be held.

[0008] Furthermore, the two rigid test contacts are arranged side by side at the first end of the support rod, and the rigid test contacts are rotatably configured with respect to the support rod.

[0009] Furthermore, the rigid test contact includes a contact head and an insulating part. The contact head is connected to a first end of the insulating part, and the second end of the insulating part is connected to the support rod. The contact head is used for electrical contact with the iron cap of the insulator, and the insulating part is used for insulating contact with the insulator.

[0010] Furthermore, the contact head is made of a magnetically conductive material.

[0011] Furthermore, a knob is provided on the support rod, and the connection end of the rigid test contact and the flexible test line is fixed in the knob. The knob is used to drive the rigid test contact to rotate when it is turned.

[0012] Furthermore, the support rod includes a first support portion and a second support portion. The first end of the first support portion is connected to the rigid test contact, and the second end of the first support portion is detachably connected to the first end of the second support portion. The second end of the second support portion is used for being held. The flexible test line includes a first test segment and a second test segment. The first end of the first test segment is connected to the rigid test contact, and the second end of the first test segment is detachably connected to the first end of the second test segment. The second end of the second test segment is connected to the high-voltage signal transmission terminal. Both the first test segment and the second test segment are fixed to the support rod by detachable fasteners. The second support portion is a telescopic structure.

[0013] Furthermore, a recessed portion is provided on the side of the first support portion that is connected to the rigid test contact. The recessed portion is used to prevent the first support portion from contacting the shed in the middle of the insulator and hindering the contact between the rigid test contact and the iron caps at both ends of the insulator.

[0014] This utility model embodiment also provides a test system for a supervisory porcelain insulator zero-value detection device. The test system is set in the test device and includes a high-voltage generation module, a voltage divider module, and a voltage test module. Two high-voltage signal transmission terminals are respectively connected in parallel with the voltage divider module and the high-voltage generation module. The input terminal of the voltage test module is connected to the voltage divider module.

[0015] Furthermore, the high-voltage generating module includes a power supply module and a boost module. The boost module is connected to the power supply module and is used to increase the voltage of the low-voltage power supply module to generate an output voltage greater than 50kV.

[0016] Furthermore, the testing device includes a test box and a handheld receiver. The testing system is set inside the test box. The testing system also includes a first wireless communication module and a control module. The output terminal of the voltage testing module is connected to the input terminal of the control module. The control module is connected to the first wireless communication module. The handheld receiver is equipped with a second wireless communication module, a processing module, and a second display module. The second display module is connected to the second wireless communication module through the processing module. The first wireless communication module and the second wireless communication module are wirelessly connected.

[0017] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages: by setting a support rod to fix the flexible test line, and setting the rigid test contact at the end of the support rod, the two rigid test contacts can be directly brought into contact with the iron caps at both ends of the insulator by holding the support rod by hand, thereby improving the contact efficiency between the contact device and the insulator and thus improving the detection efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the contact device of a supervisory porcelain insulator zero-value detection device provided in this embodiment of the utility model;

[0020] Figure 2This is a schematic diagram of the testing device of a supervised porcelain insulator zero-value detection equipment provided in this embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the overall structure of the testing device of the supervised porcelain insulator zero-value detection equipment provided in this embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the handheld receiver of a supervisory porcelain insulator zero-value detection device provided in this embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the testing principle of a testing system for a supervisory porcelain insulator zero-value testing device provided in this embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the test system structure of a supervisory porcelain insulator zero-value detection device provided in this embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the system principle of the handheld receiver of a supervisory porcelain insulator zero-value detection device provided in this embodiment of the present utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. High-voltage signal transmission terminal; 2. Flexible test lead; 21. First test section; 22. Second test section; 3. Rigid test contact; 31. Contact head; 32. Insulation part; 4. Support rod; 41. First support part; 411. Recessed part; 42. Second support part; 43. Detachable fastener; 5. Knob; 6. Test box; 61. Upper shell; 62. Lower shell; 601. Test platform; 602. First display module; 603. LED light; 604. Buzzer; 605. Memory card slot; 606. Switch button; 607. Battery compartment; 608. Grounding terminal; 7. Handheld receiver; 701. Second wireless communication module; 702. Second display module; 703. Handheld handle. Detailed Implementation

[0028] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0032] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0033] Please see Figure 1-4 This utility model provides a supervisory porcelain insulator zero-value detection device, including a testing device and a contact device. The testing device includes two high-voltage signal transmission terminals 1, and the contact device includes two flexible test wires 2, two rigid test contacts 3, and a support rod 4. The first ends of the two flexible test wires 2 are respectively connected to the two high-voltage signal transmission terminals 1, and the second ends of the two flexible test wires 2 are respectively connected to the first ends of the two rigid test contacts 3. The flexible test wires 2 are fixed on the support rod 4, and the first ends of the two rigid test contacts 3 are respectively fixed to the first end of the support rod 4. The second ends of the two rigid test contacts 3 are respectively used to contact the iron caps at both ends of the insulator, and the second end of the support rod 4 is used to be held.

[0034] Understandably, in practice, by setting up a support rod 4 to fix the flexible test line 2, and setting the rigid test contact 3 at the end of the support rod 4, the two rigid test contacts 3 can be directly brought into contact with the iron caps at both ends of the insulator by holding the support rod 4, thereby improving the contact efficiency between the contact device and the insulator and thus improving the detection efficiency.

[0035] It should be noted that the insulator consists of a silicone rubber shed sheath, a glass fiber reinforced epoxy resin core rod, and galvanized carbon steel end fittings (including iron caps), and is suitable for insulation and suspension of conductors in high-voltage and ultra-high-voltage AC and DC transmission lines.

[0036] In a more specific embodiment, two rigid test contacts 3 are arranged side by side at the first end of the support rod 4, and the rigid test contacts 3 are rotatably arranged with the support rod 4.

[0037] Understandably, in specific implementations, the size of insulators may vary in different scenarios, and the spacing between the iron caps at both ends of the insulator may also vary. By rotating the rigid test contact 3 and the support rod 4, the opening and closing angles of the two rigid test contacts 3 can be adjusted to accommodate the spacing between the iron caps at both ends of different insulators.

[0038] In a more specific embodiment, the rigid test contact 3 includes a contact head 31 and an insulating part 32. The contact head 31 is connected to a first end of the insulating part 32, and the second end of the insulating part 32 is connected to a support rod 4. The contact head 31 is used for electrical contact with the iron cap of the insulator, and the insulating part 32 is used for insulating contact with the insulator.

[0039] Understandably, in practical implementation, when the distance between the iron caps at both ends of the insulator is large, by rotating the rigid test contact 3 outward around the first end of the support rod 4, the distance between the contact heads 31 of the two rigid test contacts 3 increases, allowing them to contact the iron caps with larger distances. The conductive material of the insulating part 32 is wrapped with insulating material. When the opening angle between the rigid test contacts 3 is large, if the conductive material corresponding to the insulating part 32 is not wrapped with insulating material, it may contact other parts outside the iron caps, causing test interference and affecting the test results. Therefore, in this embodiment, the rigid test contact 3 has an insulating part 32 between the contact head 31 and the support rod 4. The insulating part 32 can effectively support the rotation of the contact head 31 while avoiding interference with the test results.

[0040] In a more specific embodiment, the contact head 31 is made of a magnetically conductive material.

[0041] Understandably, in practice, the contact head 31 is magnetic and can be attracted to the iron caps at both ends of the insulator to prevent the contact head 31 from being loosely connected to the iron caps due to slight vibration of the support rod 4.

[0042] In a more specific embodiment, a knob 5 is provided on the support rod 4, and the connection end of the rigid test contact 3 and the flexible test line 2 is fixed in the knob 5. The knob 5 is used to drive the rigid test contact 3 to rotate when it is turned.

[0043] Understandably, in practice, by fixing the connection end of the rigid test contact 3 and the flexible test lead 2 inside the knob 5, the angle of the rigid test contact 3 can be adjusted by turning the knob 5 by hand, thus avoiding the deformation or damage of the rigid test contact 3 caused by directly bending the rigid test contact 3 by hand. At the same time, the knob 5, as the outer shell of the connection end of the rigid test contact 3 and the flexible test lead 2, plays a further protective role.

[0044] In a more specific embodiment, a screw is provided at the bottom of the knob 5, and the screw passes through the support rod 4 and is connected to the nut. In practice, the rotation angle of the knob 5 is adjusted by loosening the nut, and the knob 5 is fixed by tightening the nut.

[0045] In a more specific embodiment, the support rod 4 includes a first support portion 41 and a second support portion 42. The first end of the first support portion 41 is connected to the rigid test contact 3, and the second end of the first support portion 41 is detachably connected to the first end of the second support portion 42. The second end of the second support portion 42 is used to be held. The flexible test line 2 includes a first test segment 21 and a second test segment 22. The first end of the first test segment 21 is connected to the rigid test contact 3, and the second end of the first test segment 21 is detachably connected to the first end of the second test segment 22. The second end of the second test segment 22 is connected to the high-voltage signal transmission terminal 1. Both the first test segment 21 and the second test segment 22 are fixed to the support rod 4 by a detachable fastener 43. The second support portion 42 is a telescopic structure.

[0046] Understandably, in practice, when not in use, the flexible test line 2 can be detached from the support rod 4 by disassembling the detachable fastener 43, and the first support part 41, the second support part 42, the first test section 21, and the second test section 22 can be separated, allowing the first support part 41, the first test section 21, and the rigid test contact 3 to be stored separately. Since the second test section 22 and the second support part 42 are relatively long, after being removed, the second support part 42 can be retracted and stored, and the second test section 22 can be rolled up and stored, improving storage convenience and saving storage space.

[0047] In a more specific embodiment, the detachable fastener 43 is a buckle, one end of which is fixedly connected to the support rod 4, and the other end is in contact with the support rod 4. When the buckle is lifted with force, the end of the buckle in contact with the support rod 4 has a gap for the flexible test line 2 to pass through.

[0048] In a more specific embodiment, the first test segment 21 is connected to the second test segment 22 via a male-female pair plug-in.

[0049] In a more specific embodiment, the first support portion 41 and the second support portion 42 are connected by screw and threaded hole engagement.

[0050] In a more specific embodiment, a recessed portion 411 is provided on the side where the first support portion 41 is connected to the rigid test contact 3. The recessed portion 411 is used to prevent the first support portion 41 from contacting the shed in the middle of the insulator and hindering the contact between the rigid test contact 3 and the iron caps at both ends of the insulator.

[0051] Understandably, in specific implementation, by setting the recessed part 411, the first support part 41 is provided with a recessed space to form a receiving space to accommodate the umbrella skirt, so as to avoid the first support part 41 contacting the umbrella skirt in the middle of the insulator and hindering the contact between the rigid test contact 3 and the iron caps at both ends of the insulator.

[0052] In a more specific embodiment, the recess 411 adopts a concave arc structure.

[0053] Understandably, in practical implementation, the curved surface characteristics of the concave arc structure can effectively reduce the risk of mechanical damage to the umbrella skirt in scenarios of "slight contact" or "low-intensity contact" (such as accidental contact caused by small-amplitude vibration or slight contact deviation) by optimizing the contact pattern and dispersing stress.

[0054] In a more specific embodiment, the support rod 4 is made of epoxy resin insulating material, which improves the safety of using the support rod 4.

[0055] In a more specific embodiment, the flexible test lead 2 is a silicone high-voltage wire that can withstand 50kV high voltage.

[0056] This utility model embodiment also provides a testing system for a supervisory porcelain insulator zero-value detection device. The testing system is installed within the testing apparatus. Please refer to [link to relevant documentation]. Figure 5 It includes a high-voltage generation module, a voltage divider module, and a voltage testing module. Two high-voltage signal transmission terminals 1 are connected in parallel with the voltage divider module and the high-voltage generation module, respectively. The input terminal of the voltage testing module is connected to the voltage divider module.

[0057] Understandably, in practice, the insulator's two ends are connected in parallel to the high-voltage generating module and the voltage divider module via two high-voltage signal transmission terminals 1. The high-voltage generating module transmits a high-voltage signal to both ends of the insulator through the two high-voltage signal transmission terminals 1. If the insulator is damaged, its resistance decreases, and the voltage across the insulator will decrease, becoming much lower than the voltage generated by the high-voltage generating module. If the insulator is not damaged, its resistance remains unchanged, and the voltage across the insulator is similar to the voltage generated by the high-voltage generating module. The voltage divider module is connected in parallel to the two terminals and also to the voltage testing module. The voltage divider module reduces the measurement voltage of the testing module, effectively preventing high voltage from directly impacting the testing equipment, thus enabling effective measurement of the voltage across the insulator and facilitating subsequent judgment of the insulator's condition based on the voltage value.

[0058] It should be noted that the circuit structure of the voltage test module and the voltage divider module, as well as the implementation principle of the voltage test module measuring the voltage parameters of the voltage divider module, are all existing technologies. For details, please refer to the patent document with publication number CN210982709U, which discloses a detection circuit for voltage divider circuit parameters.

[0059] In a more specific embodiment, the voltage divider module employs a high-resistance voltage divider.

[0060] Understandably, in practice, high-impedance voltage dividers, based on their characteristics of low interference to the circuit under test, low power consumption, and high stability, proportionally convert high voltage to low voltage, hardly changing the voltage distribution of the circuit under test, thus improving measurement accuracy.

[0061] In a more specific embodiment, the testing device includes a test box 6 and a handheld receiver 7. The testing system is set inside the test box 6. The testing system also includes a first wireless communication module and a control module. The output terminal of the voltage testing module is connected to the input terminal of the control module, and the control module is connected to the first wireless communication module. The handheld receiver 7 is provided with a second wireless communication module 701, a processing module, and a second display module 702. The second display module 702 is connected to the second wireless communication module 701 through the processing module. The first communication module of the testing system is connected to the processing module of the handheld receiver 7 through the second wireless communication module 701 of the handheld receiver 7.

[0062] Understandably, in practice, the handheld receiver 7 is used by supervisors or other monitoring personnel, the wireless communication module is mainly used to receive the test data sent by the test box 6, and the second display module 702 is used to display the test results.

[0063] In a more specific embodiment, the processing module and the control module employ a microcontroller or a single-chip microcomputer, etc.

[0064] In a more specific embodiment, the second display module 702 is a 5-inch touch screen, which displays text and colors to clearly distinguish different test results. The test box 6 can also be operated through the virtual buttons on the screen.

[0065] In a more specific embodiment, the handheld receiver 7 is provided with hand handles 703 on both sides, mainly for gripping during use. The use of dual handles improves the reliability of gripping.

[0066] In a more specific embodiment, the test box 6 includes an upper shell 61, a lower shell 62, and a handle. When testing is required, the upper shell 61 is opened to perform various operations on the device. The lower shell 62 houses a test platform 601, which includes a switch button 606, a battery compartment 607, a grounding terminal 608, a buzzer 604, and an LED light 603. The switch button 606 is primarily used for powering the device on and off. The battery compartment 607 stores the device's battery, which is an 18650 lithium battery. The grounding terminal 608 is used for grounding the device to ensure safety. The memory card slot 605 is for inserting a TF card to store test data. The test results are indicated in three ways: first, through the buzzer 604, which sounds briefly for a normal result and continuously for a zero result; second, through the LED 603, which lights up green for a normal result and red for a zero result; and third, through the display module, which displays "Normal" for a normal result and "Zero" for a zero result. The screen is a touch screen, and operators can control the device using the on-screen buttons.

[0067] In a more specific embodiment, such as Figure 5 and 6 As shown, the test system also includes a power supply module, a boost module, a signal processing module, and a first display module 602. The power supply module is connected to the control module, the input terminal of the boost module is connected to the control module, and the output terminal of the boost module is connected to the high-voltage signal transmission terminal 1. The power supply module, control module, and boost module form a high-voltage generation module. The signal processing module is located between the control module and the signal acquisition module. The signal acquisition module includes a voltage divider module and a voltage testing module.

[0068] In a more specific embodiment, the high-voltage generating module includes a power supply module and a boost module, the boost module being connected to the power supply module, and the boost module being used to increase the voltage of the low-voltage power supply module to generate an output voltage greater than 50kV.

[0069] Understandably, in practical implementation, compared to the insulation resistance tester used in the prior art, the output voltage of the high voltage generating module in this embodiment can reach more than 50kV, which is 10 times that of the insulation resistance tester. It can effectively detect internal defects in porcelain insulators, thereby distinguishing between normal and zero-value insulators and improving the detection accuracy.

[0070] It should be noted that the boost module in this embodiment uses a DC voltage multiplier to boost the 12V power supply voltage to 50kV. The composition and working principle of the boost module are existing technologies. For details, please refer to the publication number CN 213517410 U. Existing technologies disclose the use of a 6-times voltage multiplier rectifier circuit to boost low voltage to a high voltage of over 50kV.

[0071] The working process of a supervisory porcelain insulator zero-value detection device in this embodiment is as follows:

[0072] like Figure 6 As shown, the power module mainly uses 18650 lithium batteries to provide 12V power to the system. The control module mainly uses domestic GD32F103 series control chips. The control module controls the boost module to work. The boost module uses DC voltage multiplier to boost the 12V power supply voltage to 50kV, applying a 50kV high voltage to the insulator. The voltage divider module of the signal acquisition module uses a high-impedance voltage divider to assist in acquiring the voltage change across the insulator. The signal processing module filters and calculates the acquired voltage signal and converts it into a digital signal to feed back to the control module for detection result judgment. The control module sends the detection result to the first display module 602 to provide result feedback to the operator. At the same time, the detection result is sent to the handheld receiver 7 through the first wireless communication module, which uses the 2.4GHz frequency band for transmission.

[0073] like Figure 7 As shown, the power module of the handheld receiver 7 is mainly powered by an 18650 lithium battery, providing 12V power to the system. The processing module mainly uses the domestic GD32F103 series control chip. The second wireless communication module uses the 2.4GHz frequency band for bidirectional transmission and reception. The second display module 702 is a 5-inch touch screen, mainly used to display the test results.

[0074] The high-voltage generating module in this embodiment can generate instantaneous high voltages of over 50kV, which are connected to insulators via contact devices and applied across the insulators. If the insulator is a good insulator, the voltage amplitude that the insulator's ends can withstand is relatively high; if the insulator is a zero-value insulator, the voltage amplitude that the insulator's ends can withstand is very low. By detecting the voltage amplitude across the insulator's ends, the insulation performance of the insulator can be accurately determined. The detection results are mainly of two types: normal and zero value. The control module sends the detection results to the handheld receiver 7 via the first wireless communication module and the second wireless communication module 701 for management personnel to view.

[0075] It should be noted that the terms used to describe positional relationships in the above examples and accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. The various embodiments of this utility model described above are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A supervisory-type zero-value testing device for porcelain insulators, characterized in that, include: The test device includes two high-voltage signal transmission terminals, and the contact device includes two flexible test leads, two rigid test contacts, and a support rod. The first ends of the two flexible test leads are respectively connected to the two high-voltage signal transmission terminals, and the second ends of the two flexible test leads are respectively connected to the first ends of the two rigid test contacts. Both flexible test leads are fixed to the support rod, and the first ends of the two rigid test contacts are respectively fixed to the first end of the support rod. The second ends of the two rigid test contacts are respectively used to contact the iron caps at both ends of the insulator, and the second end of the support rod is used for gripping.

2. The supervisory porcelain insulator zero-value testing device according to claim 1, characterized in that, Two rigid test contacts are arranged side by side at the first end of the support rod, and the rigid test contacts are rotatably connected to the support rod.

3. The supervisory porcelain insulator zero-value testing device according to claim 2, characterized in that, The rigid test contact includes a contact head and an insulating part. The contact head is connected to a first end of the insulating part, and the second end of the insulating part is connected to the support rod. The contact head is used for electrical contact with the iron cap of the insulator, and the insulating part is used for insulating contact with the insulator.

4. The supervisory porcelain insulator zero-value testing device according to claim 3, characterized in that, The contact head is made of a magnetically conductive material.

5. The supervisory porcelain insulator zero-value testing device according to claim 4, characterized in that, A knob is provided on the support rod, and the connection end of the rigid test contact and the flexible test line is fixed in the knob. The knob is used to drive the rigid test contact to rotate when it is turned.

6. The supervisory porcelain insulator zero-value testing device according to claim 5, characterized in that, The support rod includes a first support portion and a second support portion. A first end of the first support portion is connected to the rigid test contact, and a second end of the first support portion is detachably connected to the first end of the second support portion. The second end of the second support portion is used for gripping. The flexible test line includes a first test segment and a second test segment. A first end of the first test segment is connected to the rigid test contact, and a second end of the first test segment is detachably connected to the first end of the second test segment. The second end of the second test segment is connected to the high-voltage signal transmission terminal. Both the first test segment and the second test segment are fixed to the support rod by detachable fasteners. The second support portion is a telescopic structure.

7. The supervisory porcelain insulator zero-value testing device according to claim 6, characterized in that, A recessed portion is provided on the side where the first support part is connected to the rigid test contact. The recessed portion is used to prevent the first support part from contacting the shed in the middle of the insulator and hindering the contact between the rigid test contact and the iron caps at both ends of the insulator.

8. A testing system for the zero-value testing equipment for supervised porcelain insulators as described in claim 1, characterized in that, The test system is installed in the test device and includes a high voltage generation module, a voltage divider module, and a voltage test module. The two high voltage signal transmission terminals are respectively connected in parallel with the voltage divider module and the high voltage generation module. The input terminal of the voltage test module is connected to the voltage divider module.

9. The testing system according to claim 8, characterized in that, The high-voltage generating module includes a power supply module and a boost module. The boost module is connected to the power supply module and is used to increase the voltage of the low-voltage power supply module to generate an output voltage greater than 50kV.

10. The testing system according to claim 8 or 9, characterized in that, The testing device includes a test box and a handheld receiver. The testing system is set inside the test box. The testing system also includes a first wireless communication module and a control module. The output terminal of the voltage testing module is connected to the input terminal of the control module. The control module is connected to the first wireless communication module. The handheld receiver is equipped with a second wireless communication module, a processing module, and a second display module. The second display module is connected to the second wireless communication module through the processing module. The first wireless communication module and the second wireless communication module are wirelessly connected.

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