Mechanical swing test device and method for insulator

Abstract

The invention relates to the technical field of insulator tests, and discloses a mechanical swing test device and method for an insulator, and the device comprises a swing testing machine, a connection tool, an insulator sample, a testing machine testing system, and a resistance strain gauge testing system. The swing testing machine is located on one side of the insulator sample, one end of the connecting tool is connected to the control end of the swing testing machine, and the other end is arranged at the top of the insulator sample; the control end of the testing machine testing system is connected with the control end of the swing testing machine; resistance strain gauges are respectively pasted on two sides of the insulator sample, and the resistance strain gauges are connected to a resistance strain gauge test system through leads. According to the invention, a mechanical swing test is carried out on the insulator sample through the swing testing machine, and the dynamic load condition in an actual working environment can be simulated, so that the mechanical property and durability of the insulator can be evaluated more accurately.

Description

Technical Field

[0001] The invention relates to the technical field of insulator testing, and in particular to a mechanical swing test device and method for an insulator. Background Art

[0002] Hollow insulators and post insulators are important components of high-voltage electrical appliances. They are widely used in power transformation equipment of various voltage levels and have good physical and chemical stability, thermal stability, electrical and mechanical properties. They are commonly used in electrical equipment such as transformers, circuit breakers, disconnectors, capacitors, mutual inductors, lightning arresters and cable terminals, and need to withstand various mechanical loads for a long time. After these two types of insulators are assembled in electrical equipment, they may cause bending stresses including end mechanical loads, short-circuit loads, icing loads, operating loads, wind loads, earthquake loads, etc. Under the combined influence of these factors, the stress conditions of the insulators are complicated. In theory, with the advancement of manufacturing technology, the design margin of bending strength is large, and the probability of safety accidents in insulators should be relatively small, but accidents often occur in practice.

[0003] In recent years, hollow insulators and post insulators have broken or exploded during installation or operation in many places. The various power grid accidents caused by them have seriously affected the safety, stability and reliability of the power grid. In particular, secondary accidents caused by pulverizing explosions of hollow porcelain insulators are likely to cause major safety accidents. There are many factors that affect the fracture, and in most cases it is not easy to trace the cause of the fracture, especially for pulverizing explosions, where it is often difficult to directly find key evidence.

[0004] The purpose of the bending load test in the current national standard is to mainly evaluate the mechanical properties of hollow and post insulators under bending loads, including their bending strength, bending strength modulus, etc. The bending load test is used to test whether the insulator can maintain the structural integrity and its bending strength grade under specified conditions. The main feature is to focus on the mechanical properties of the insulator under static or quasi-static bending loads. The disadvantage is that it cannot test the durability and stability of the insulator under dynamic loads. The mechanical swing test can be used to evaluate the durability and stability of insulators under mechanical swing conditions. The advantage of this test is that it can simulate the dynamic loads that insulators may experience under natural factors such as wind and earthquakes to a certain extent, so as to test their safety and reliability in long-term operation.

[0005] The closest existing technology is the bending load test specified in the current national standard. The method is to install the insulator on a testing machine and apply a bending load to simulate the stress conditions in actual operation. During the test, the load is gradually increased according to the regulations until the insulator is damaged or the specified load value is reached. In this process, the deformation, breaking load and other parameters of the insulator are measured and recorded. The characteristic is that it mainly focuses on the mechanical properties of the insulator under static or quasi-static bending load. The bending performance of the insulator is mainly evaluated based on parameters such as the breaking load and deformation of the insulator. The larger the breaking load, the higher the bending strength of the insulator; the smaller the deformation, the better its stiffness.

[0006] The main feature of the existing bending load test is that it focuses on the mechanical properties of insulators under static or quasi-static bending loads, and is unable to test the durability and stability of insulators under dynamic loads. Summary of the invention

[0007] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a mechanical swing test device and method for insulators to solve the technical problem that the durability and stability of insulators under dynamic loads cannot be tested in the prior art.

[0008] The present invention is achieved through the following technical solutions: In a first aspect, the present invention provides a mechanical swing test device for an insulator, comprising a swing test machine, a connection tool, an insulator sample, a test machine test system, and a resistance strain gauge test system; The swing test machine is located on one side of the insulator sample, one end of the connecting tool is connected to the control end of the swing test machine, and the other end is arranged on the top of the insulator sample; The control end of the testing machine test system is connected to the control end of the swing testing machine; Resistance strain gauges are respectively attached to both sides of the insulator sample, and the resistance strain gauges are connected to the resistance strain gauge test system through leads.

[0009] Preferably, the connecting tool comprises a first swing assembly, a second swing assembly and a sample mounting assembly; One end of the first swing component is connected to the control end of the swing tester, the other end of the first swing component is movably connected to one end of the second swing component, the other end of the second swing component is connected to the sample mounting component, and the sample mounting component is arranged on the top of the insulator sample.

[0010] Further, the first swing assembly includes a threaded fork; One end of the threaded fork is connected to the control end of the swing tester through a locking round nut; the other end of the threaded fork is movably connected to one end of the second swing component, and a pin shaft is inserted between the threaded fork and one end of the second swing component.

[0011] Furthermore, a level gauge is provided on the threaded fork.

[0012] Furthermore, the second swing assembly includes a swing rod, a connecting sleeve and a threaded connecting rod; The other end of the threaded fork is movably connected to one end of the swing rod, and a pin shaft is inserted between the other end of the swing rod; the other end of the swing rod is movably connected to one end of the threaded connecting rod; the connecting sleeve is arranged on the swing rod and the threaded connecting rod, and the two ends of the connecting sleeve are respectively fixed to the swing rod and the threaded connecting rod by locking round nuts; the other end of the threaded connecting rod is arranged at the connecting end of the sample mounting assembly.

[0013] Further, the sample mounting assembly includes a sample mounter and a mounting transition plate; The connecting end of the sample mounter is provided with the other end of the threaded connecting rod through a locking round nut; The mounting transition plate is assembled on the sample mounter through the mounting hole, and the mounting transition plate is arranged on the top of the insulator sample.

[0014] Preferably, the swing tester includes a tester control base and a tester control panel; The control end of the test machine control platform is connected to the control end of the test system of the test machine; the test machine control panel is arranged on the test machine control platform; The test machine control board is provided with a swing control component, the swing control component is connected to the driving end of the test machine control base via the test machine control board, and the swing control component is connected to the connecting tooling.

[0015] Further, the swing control assembly includes a lifting and moving loading plate and a telescopic loading rod; The lifting and moving loading plate is provided with a lifting mechanism, the driving end of the lifting mechanism is connected to one end of the telescopic loading rod, and the other end of the telescopic loading rod is connected to the connecting tooling; The driving ends of the lifting mechanism and the telescopic loading rod are connected to the driving end of the control base of the testing machine via the testing machine control panel.

[0016] Preferably, the connecting fixture is a horizontal structure, and its two ends are respectively vertically connected to the control end of the swing test machine and the insulator sample.

[0017] In a second aspect, the present invention further provides a method for testing a mechanical swing test for an insulator, based on the above-mentioned testing device for testing a mechanical swing test for an insulator, comprising the following process: The testing machine test system sets the swing parameters and sends drive instructions. After receiving the drive instructions, the swing testing machine drives the connecting tooling to swing. The connecting tooling also drives the insulator sample to swing. The resistance strain gauge test system monitors the swing response and strain change of the insulator sample in real time through the resistance strain gauges on both sides of the insulator sample, and monitors the micro-deformation state of the insulator sample during the swing test according to the dynamic monitoring on the resistance strain gauge test system.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides a mechanical swing test device for insulators, wherein a swing test machine is located on one side of an insulator sample, one end of a connecting tool is connected to the control end of the swing test machine, and the other end is arranged on the top of the insulator sample; the control end of the test machine test system is connected to the control end of the swing test machine; resistance strain gauges are respectively attached to both sides of the insulator sample, and the resistance strain gauges are connected to the resistance strain gauge test system through leads. The mechanical swing test of the insulator sample is performed by the swing test machine, which can simulate the dynamic load conditions in the actual working environment, thereby more accurately evaluating the mechanical properties and durability of the insulator. The resistance strain gauges are attached to both sides of the insulator sample, which can capture the strain changes of the sample in the swing process in real time, and these changes are accurately measured and recorded by the resistance strain gauge test system, thereby improving the accuracy and reliability of the test.

[0019] Furthermore, the connecting tooling includes a first swinging assembly, a second swinging assembly, and a sample mounting assembly; one end of the first swinging assembly is connected to the control end of the swing tester, the other end of the first swinging assembly is movably connected to one end of the second swinging assembly, the other end of the second swinging assembly is connected to the sample mounting assembly, and the sample mounting assembly is arranged on the top of the insulator sample. Through the series design of the first swinging assembly and the second swinging assembly, the entire tooling can achieve multi-directional swinging, increasing the flexibility of the test. This design can simulate the stress conditions of the insulator sample in different directions and angles, so as to more comprehensively evaluate its performance.

[0020] Furthermore, the first swing assembly includes a threaded fork; one end of the threaded fork is connected to the control end of the swing test machine through a locking round nut; the other end of the threaded fork is movably connected to one end of the second swing assembly, and a pin is inserted between the threaded fork and the one end of the second swing assembly. The threaded fork is directly connected to the control end of the swing test machine and is fixed by a locking round nut, so that the swing test machine can accurately control the first swing assembly. This precise control capability enables the tooling to perform tests according to a predetermined swing angle and frequency, thereby improving the accuracy and reliability of the test.

[0021] Furthermore, a level gauge is provided on the threaded fork, which can monitor the horizontal state of the threaded fork in real time during the swinging process. This helps to ensure that the insulator sample is always in a predetermined horizontal position during the test, avoiding test errors caused by tilting or shaking.

[0022] Furthermore, the second swing assembly includes a swing rod, a connecting sleeve and a threaded connecting rod; the other end of the threaded fork is movably connected to one end of the swing rod, and a pin is inserted between the other end of the threaded fork and the one end of the swing rod; the other end of the swing rod is movably connected to one end of the threaded connecting rod; the connecting sleeve is set on the swing rod and the threaded connecting rod, and the two ends of the connecting sleeve are respectively fixed on the swing rod and the threaded connecting rod by locking round nuts; the other end of the threaded connecting rod is set at the connecting end of the sample mounting assembly. The swing rod and the threaded connecting rod are designed with a movably connected and threaded connecting sleeve, so that the second swing assembly can swing flexibly in multiple directions. It not only increases the flexibility of the tooling, but also enables it to adapt to insulator samples of different shapes and sizes, improving the versatility and adaptability of the test.

[0023] Furthermore, the sample mounting assembly includes a sample mounter and a mounting transition plate; the connecting end of the sample mounter is provided with the other end of the threaded connecting rod through a locking round nut; the mounting transition plate is assembled on the sample mounter through a mounting hole, and the mounting transition plate is arranged on the top of the insulator sample. The connecting end of the sample mounter is tightly connected to the other end of the threaded connecting rod through a locking round nut, which is not only stable and reliable, but also ensures that the sample mounter and the threaded connecting rod will not loosen due to vibration or force during the test. The mounting transition plate is assembled on the sample mounter through the mounting hole and is directly arranged on the top of the insulator sample, providing stable support for the insulator sample, and also improving the applicability to different insulator samples.

[0024] Furthermore, the swing test machine includes a test machine control base and a test machine control board; the control end of the test machine control base is connected to the control end of the test machine test system; the test machine control board is arranged on the test machine control base; a swing control component is arranged on the test machine control board, the swing control component is connected to the driving end of the test machine control base via the test machine control board, and the swing control component is connected to the connecting fixture. The swing test machine realizes a high degree of integration of the test system through the integrated design of the test machine control base and the test machine control board. This design not only simplifies the structure of the test system, but also improves the degree of automation of the test.

[0025] Furthermore, the swing control assembly includes a lifting and moving loading plate and a telescopic loading rod; a lifting mechanism is provided on the lifting and moving loading plate, a driving end of the lifting mechanism is connected to one end of the telescopic loading rod, and the other end of the telescopic loading rod is connected to the connecting tool; the driving ends of the lifting mechanism and the telescopic loading rod are connected to the driving end of the control base of the testing machine through the testing machine control panel, and the lifting and moving loading plate and the telescopic loading rod enable the swing control assembly to apply precise loading force to the connecting tool and the insulator sample. The lifting and moving loading plate can also be adjusted according to the height of the insulator sample to meet different testing requirements.

[0026] The present invention also provides a mechanical swing test method for insulators. The test machine test system can set accurate swing parameters and send drive instructions to the swing test machine, ensuring the consistency of the swing parameters during the test, thereby improving the accuracy and reliability of the test; the resistance strain gauge test system monitors the swing response and strain change in real time through the resistance strain gauges on both sides of the insulator sample, further ensuring the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a mechanical swing test device for insulators according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the connecting tooling part in an embodiment of the present invention; In the figure: 1. Swing test machine; 2. Connecting tooling; 3. Insulator sample; 4. Test machine test system; 5. Resistance strain gauge test system; 6. Sample mounting base; 7. Resistance strain gauge; 11. Test machine control base; 12. Test machine control board; 13. Lifting and moving loading plate; 14. Telescopic loading rod; 21. Level; 22. Threaded fork; 23. Pin shaft; 24. Swing rod; 25. Connecting sleeve; 26. Threaded connecting rod; 27. Locking round nut; 28. Sample installer; 29. ​​Install transition plate. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] The purpose of the present invention is to provide a mechanical swing test device and method for insulators to solve the technical problem that the durability and stability of insulators under dynamic load cannot be tested in the prior art, and to evaluate the performance and stability of hollow and post insulators under dynamic load conditions. Based on the real-time monitoring mechanical swing test of resistance strain, the stress distribution, deformation characteristics, failure mode, etc. of hollow and post insulators under swing conditions can be studied to evaluate their dynamic stability and mechanical strength, providing a scientific basis for the design and optimization of insulators.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings: Example 1 See also Figure 1 In one embodiment of the present invention, a mechanical swing test device for an insulator is provided, comprising a swing test machine 1, a connecting tool 2, an insulator sample 3, a test machine test system 4 and a resistance strain gauge test system 5; the swing test machine 1 is located on one side of the insulator sample 3, one end of the connecting tool 2 is connected to the control end of the swing test machine 1, and the other end is arranged on the top of the insulator sample 3; the control end of the test machine test system 4 is connected to the control end of the swing test machine 1; resistance strain gauges 7 are respectively applied on both sides of the insulator sample 3, and the resistance strain gauges 7 are connected to the resistance strain gauge test system 5 through leads.

[0032] In this embodiment, the resistance strain gauge 7 is used as an element to measure the strain of the insulator in the pasting area, and it can convert the change of strain on the insulator into the change of resistance. Generally, the resistance strain gauge is pasted at the maximum tensile stress and compressive stress according to simulation calculation or experience, or pasted to other positions of the insulator according to the needs of experimental research.

[0033] Specifically, the connecting tool 2 includes a first swing assembly, a second swing assembly and a sample mounting assembly; One end of the first swing component is connected to the control end of the swing tester 1, the other end of the first swing component is movably connected to one end of the second swing component, the other end of the second swing component is connected to the sample mounting component, and the sample mounting component is arranged on the top of the insulator sample 3.

[0034] The first swing assembly includes a threaded fork 22; one end of the threaded fork 22 is connected to the control end of the swing tester 1 through a locking round nut 27; the other end of the threaded fork 22 is movably connected to one end of the second swing assembly, and a pin 23 is inserted between the threaded fork 22 and one end of the second swing assembly. A level 21 is provided on the threaded fork 22.

[0035] Among them, the second swing assembly includes a swing rod 24, a connecting sleeve 25 and a threaded connecting rod 26; the other end of the threaded fork 22 is movably connected to one end of the swing rod 24, and a pin shaft 23 is inserted between the threaded fork 22 and one end of the swing rod 24; the other end of the swing rod 24 is movably connected to one end of the threaded connecting rod 26; the connecting sleeve 25 is sleeved on the swing rod 24 and the threaded connecting rod 26, and the two ends of the connecting sleeve 25 are respectively fixed on the swing rod 24 and the threaded connecting rod 26 by locking round nuts 27; the other end of the threaded connecting rod 26 is set at the connecting end of the sample mounting assembly.

[0036] In this embodiment, after the threaded fork 22 is subjected to the swing bending load, the insulator sample 3 is offset due to the bending load. Especially for hollow composite insulators and post composite insulators, the offset is large. Therefore, the height of the insulator sample 3 is not in the same horizontal direction as the swing test machine 1, resulting in the problem of extrusion between the sample installer and the insulator sample. After the threaded fork 22 is connected to the swing rod 24 through the pin 23, there is room for up and down adjustment in the horizontal direction to ensure the smooth progress of the mechanical swing test. A level block 21 is attached to the threaded fork 22 to monitor the horizontal state of the assembled threaded fork.

[0037] In this embodiment, the mechanical swing test fixtures are all connected by locking round nuts 27, and after connection, they need to be locked with the help of round nuts to ensure that the various connection fixtures are not loosened due to periodic swing or vibration during the test.

[0038] In this embodiment, the connecting sleeve 25 is a transition connection tooling of the swing rod 24 and the threaded connecting rod 26 using the internal thread of the connecting sleeve 25. The through hole on the connecting sleeve 25 can be penetrated with a steel rod when necessary, which plays an auxiliary fixing role when each tooling is combined.

[0039] In this embodiment, the threaded connecting rod 26 is installed with the swing rod 24 through the internal thread of the connecting sleeve 25, which can functionally adjust the length of the entire test fixture to a certain extent, ensuring a tight fit between the swing test machine, the test fixture and the insulator.

[0040] In this embodiment, the sample installer 28 is a tool connected to the insulator sample 3. To ensure applicability in different size ranges, it needs to be used together with the installation transition plate 29 through bolt connection to ensure normal installation for different sample installation holes.

[0041] Specifically, the sample mounting assembly includes a sample mounter 28 and a mounting transition plate 29; The connecting end of the sample mounter 28 is provided with the other end of the threaded connecting rod 26 through a locking round nut 27 ; the mounting transition plate 29 is assembled on the sample mounter 28 through the mounting hole, and the mounting transition plate 29 is provided on the top of the insulator sample 3 .

[0042] Specifically, the swing testing machine 1 includes a testing machine control base 11 and a testing machine control board 12; the control end of the testing machine control base 11 is connected to the control end of the testing machine test system 4; the testing machine control board 12 is arranged on the testing machine control base 11; the testing machine control board 12 is provided with a swing control component, and the swing control component is connected to the driving end of the testing machine control base 11 via the testing machine control board 12, and the swing control component is connected to the connecting tooling 2.

[0043] Specifically, the swing control assembly includes a lifting and moving loading plate 13 and a telescopic loading rod 14; the lifting and moving loading plate 13 is provided with a lifting mechanism, the driving end of the lifting mechanism is connected to one end of the telescopic loading rod 14, and the other end of the telescopic loading rod 14 is connected to the connecting tooling 2; the driving ends of the lifting mechanism and the telescopic loading rod 14 are connected to the driving end of the testing machine control base 11 via the testing machine control panel 12.

[0044] Specifically, the connecting fixture 2 is a horizontal structure, and its two ends are respectively vertically connected to the control end of the swing test machine 1 and the insulator sample 3.

[0045] In this embodiment, the insulator sample 3 includes hollow insulators and post insulators, wherein the hollow insulators are insulators with through-holes at both ends, with or without umbrellas, including end accessories; the post insulators are insulator components composed of insulating parts with end accessories permanently installed for their support. Hollow insulators and post insulators can be classified into hollow porcelain insulators, hollow composite insulators, post porcelain insulators and post composite insulators according to the material classification.

[0046] The measurement principle of the resistance strain gauge test system 5 in this embodiment is to convert the resistance change rate △R / R of the resistance strain gauge pasted on the test piece into a voltage change output, which is then amplified by an amplifier circuit and then collected by an electrical signal acquisition system. The waveform can be displayed in real time using a complete set of software and related data processing can be performed.

[0047] In this embodiment, the insulator sample 3 is placed on a sample mounting base 6 for fixing the lower end accessories of the insulator sample 3. The central axis of the insulator sample 3 should coincide with the center of the sample mounting base 6, and the swing test load should pass vertically through the axis of the insulator.

[0048] In summary, the present invention provides a mechanical swing test device for insulators, wherein the swing test machine is located on one side of the insulator sample, one end of the connecting tool is connected to the control end of the swing test machine, and the other end is arranged on the top of the insulator sample; the control end of the test machine test system is connected to the control end of the swing test machine; resistance strain gauges are respectively attached to both sides of the insulator sample, and the resistance strain gauges are connected to the resistance strain gauge test system through leads. The mechanical swing test of the insulator sample is performed by the swing test machine, which can simulate the dynamic load conditions in the actual working environment, so as to more accurately evaluate the mechanical properties and durability of the insulator. The resistance strain gauges are attached to both sides of the insulator sample, which can capture the strain changes of the sample in the swing process in real time, and these changes are accurately measured and recorded by the resistance strain gauge test system, thereby improving the accuracy and reliability of the test.

[0049] The mechanical swing test can simulate to a certain extent the various mechanical stresses that insulators may be subjected to during actual operation, such as wind force, vibration, etc. Through this test, it can be verified whether hollow and post insulators have sufficient mechanical strength to withstand these stresses and ensure their long-term stable operation. However, there are currently no relevant provisions for insulator swing tests in the current national standard system for insulators.

[0050] The present invention combines the structural characteristics of hollow and post insulator products and uses the characteristics of resistance strain gauges to design a mechanical swing test method and device for hollow and post insulators based on real-time monitoring of resistance strain gauges, which is convenient, fast, highly practical and has high measurement accuracy.

[0051] Example 2 The present invention also provides a method for testing a mechanical swing test for an insulator, based on the above-mentioned testing device for testing a mechanical swing test for an insulator, comprising the following process: The testing machine test system 4 sets the swing parameters and sends a driving instruction. After receiving the driving instruction, the swing testing machine 1 drives the connecting tooling 2 to swing. The connecting tooling 2 drives the insulator sample 3 to swing at the same time. The resistance strain gauge test system 5 monitors the swing response and strain change of the insulator sample 3 in real time through the resistance strain gauges 7 on both sides of the insulator sample 3, and monitors the micro-deformation state of the insulator sample 3 during the swing test according to the dynamic monitoring on the resistance strain gauge test system 5.

[0052] In the specific process of this embodiment, the resistance strain gauge 7 is firstly pasted on the pillar / hollow insulator, and the lead wire on the resistance strain gauge 7 is fixed on the insulator. Then the insulator is fixed on the sample mounting base 6 with bolts, and the installation size of the accessories on the insulator is referred to, and the transition plate 29 is installed to match the installation; Next, assemble the threaded fork 22, the swing rod 24, the pin 23, the connecting sleeve 25, the threaded connecting rod 26 and the sample mounter 28 in order, connect the assembled tools with the telescopic loading rod 14, and adjust the lifting mechanism of the lifting and moving loading plate 13 to a relatively suitable height according to the height of the sample; then place the sample mounter 28 on the installation transition plate 29, and according to the installation dimensions on the installation transition plate 29, adjust the height and extension length of the lifting and moving loading plate 13, as well as the threaded screwing depth of the threaded connecting rod 26 and the connecting sleeve 25, and install and connect the sample mounter 28 with the installation transition plate 29. Then refer to the level 21 on the threaded fork 22 to adjust the horizontal state of the threaded fork 22 to ensure that the entire tooling set is in a horizontal state after the assembly is complete, and finally lock all the locking round nuts 27.

[0053] Finally, the lead wire on the resistance strain gauge 7 is connected to the resistance strain gauge test system 5, and the sampling frequency and monitoring parameters are set on the resistance strain gauge test system 5. The swing test parameters such as swing load, frequency, waveform, number of times, etc. are set on the test machine test system 4. The loading test is carried out according to the prescribed procedures, and the data is automatically collected. According to the real-time monitoring curve on the resistance strain gauge, the micro-deformation state of the insulator during the swing test can be dynamically monitored.

[0054] In summary, the mechanical swing test method for insulators provided by the present invention can not only test pillars and hollow insulators of different sizes, but also test other insulator samples (such as track support insulators, etc.); resistance strain gauges are attached to the insulators, and their high sensitivity can be used to monitor the tensile stress and compressive stress state of the insulators in real time, and the state of the insulators can be dynamically monitored throughout the process to ensure the accuracy of the analysis of the insulator test results. The mechanical swing test device is cleverly designed, and its components are closely coordinated with each other to ensure that the insulators are basically horizontally swung, reducing the extrusion problem caused by the insulator offset, greatly improving the test stability and reliability, and is easy, fast and efficient to use.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A mechanical swing test device for insulators, characterized in that: It comprises a swing test machine (1), a connection tool (2), an insulator sample (3), a test machine test system (4) and a resistance strain gauge test system (5); The swing test machine (1) is located on one side of the insulator sample (3); one end of the connecting tool (2) is connected to the control end of the swing test machine (1), and the other end is arranged on the top of the insulator sample (3); The control end of the testing machine test system (4) is connected to the control end of the swing testing machine (1); Resistance strain gauges (7) are respectively attached to both sides of the insulator sample (3), and the resistance strain gauges (7) are connected to the resistance strain gauge test system (5) via leads.

2. The mechanical swing test device for insulators according to claim 1, characterized in that: The connecting tool (2) comprises a first swinging assembly, a second swinging assembly and a sample mounting assembly; One end of the first swing component is connected to a control end of the swing test machine (1), the other end of the first swing component is movably connected to one end of the second swing component, the other end of the second swing component is connected to a sample mounting component, and the sample mounting component is arranged on the top of the insulator sample (3).

3. The mechanical swing test device for insulators according to claim 2, characterized in that: The first swing assembly comprises a threaded fork (22); One end of the threaded fork (22) is connected to the control end of the swing test machine (1) via a locking round nut (27); the other end of the threaded fork (22) is movably connected to one end of the second swing component, and a pin shaft (23) is inserted between the threaded fork and the one end of the second swing component.

4. The mechanical swing test device for insulators according to claim 3, characterized in that: The threaded fork (22) is provided with a level (21).

5. The mechanical swing test device for insulators according to claim 3, characterized in that: The second swing assembly comprises a swing rod (24), a connecting sleeve (25) and a threaded connecting rod (26); The other end of the threaded fork (22) is movably connected to one end of the swing rod (24), and a pin shaft (23) is inserted between the threaded fork and the one end of the swing rod (24); the other end of the swing rod (24) is movably connected to one end of the threaded connecting rod (26); the connecting sleeve (25) is sleeved on the swing rod (24) and the threaded connecting rod (26), and the two ends of the connecting sleeve (25) are respectively fixed to the swing rod (24) and the threaded connecting rod (26) by locking round nuts (27); the other end of the threaded connecting rod (26) is arranged at the connecting end of the sample mounting assembly.

6. The mechanical swing test device for insulators according to claim 5, characterized in that: The sample mounting assembly comprises a sample mounter (28) and a mounting transition plate (29); The connection end of the sample mounter (28) is provided with the other end of the threaded connection rod (26) through a locking round nut (27); The mounting transition plate (29) is assembled on the sample mounter (28) through the mounting hole, and the mounting transition plate (29) is arranged on the top of the insulator sample (3).

7. The mechanical swing test device for insulators according to claim 1, characterized in that: The swing testing machine (1) comprises a testing machine control base (11) and a testing machine control panel (12); The control end of the test machine control base (11) is connected to the control end of the test machine test system (4); the test machine control panel (12) is arranged on the test machine control base (11); The test machine control panel (12) is provided with a swing control component, the swing control component is connected to the driving end of the test machine control base (11) via the test machine control panel (12), and the swing control component is connected to the connecting tooling (2).

8. The mechanical swing test device for insulators according to claim 7, characterized in that: The swing control assembly comprises a lifting and moving loading plate (13) and a telescopic loading rod (14); The lifting and moving loading plate (13) is provided with a lifting mechanism, the driving end of the lifting mechanism is connected to one end of the telescopic loading rod (14), and the other end of the telescopic loading rod (14) is connected to the connecting tool (2); The driving ends of the lifting mechanism and the telescopic loading rod (14) are connected to the driving end of the testing machine control base (11) via the testing machine control panel (12).

9. The mechanical swing test device for insulators according to claim 1, characterized in that: The connection tool (2) is a horizontal structure, and its two ends are respectively vertically connected to the control end of the swing test machine (1) and the insulator sample (3).

10. A mechanical swing test method for insulators, characterized in that: A mechanical swing test device for an insulator according to any one of claims 1 to 8, comprising the following process: The testing machine test system (4) sets the swing parameters and sends a driving command. After receiving the driving command, the swing testing machine (1) drives the connecting fixture (2) to swing. The connecting fixture (2) drives the insulator sample (3) to swing at the same time. The resistance strain gauge test system (5) monitors the swing response and strain change of the insulator sample (3) in real time through the resistance strain gauges (7) on both sides of the insulator sample (3), and monitors the micro-deformation state of the insulator sample (3) during the swing test according to the dynamic monitoring on the resistance strain gauge test system (5).

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