Parallel groove clamp insulation protective cover mechanical performance test equipment and test method

Abstract

The invention relates to parallel groove clamp insulation protective cover mechanical performance test equipment and a test method. The test equipment comprises a rack, a movable test part, a simulation cable assembly, a sliding assembly and a fixed test part, wherein the simulation cable assembly, the sliding assembly and the fixed test part are installed on the rack. The movable test part is slidably installed on the sliding assembly. The insulating protective cover is installed on the simulation cable assembly. The movable test part and the fixed test part are respectively fixed on two sides of the insulating protective cover. The movable test part comprises a tension meter, the movable test part slides away from the fixed test part, and when the movable test part slides until the insulation protective cover is damaged, the reading of the tension meter is the maximum load resistance of the insulation protective cover. Compared with the prior art, the test device has the advantages that the insulation protective cover is pulled from the two sides through the movable test part and the fixed test part respectively, the maximum load resistance of the insulation protective cover is measured, and the problem of detection and examination of the overall load resistance of the simulated insulation protective cover in the use environment is solved.

Description

Technical Field

[0001] The present invention relates to a parallel groove clamp, and more particularly to a mechanical property test device and test method for an insulating protective cover of a parallel groove clamp. Background Art

[0002] The parallel groove clamp, as a professional and crucial electrical fitting, is used to achieve reliable connection of parallel conductors, thereby efficiently transmitting electrical loads. This type of contact fitting is widely used in multiple key links of the power system. Especially when dealing with aluminum stranded wires, aluminum conductor steel-reinforced wires with medium and small cross-sections, and steel stranded wires used in overhead lightning conductors, it demonstrates its unique advantages. In the power line, at positions that do not directly bear tensile or tension forces, the parallel groove clamp becomes the preferred tool for connecting these conductors, ensuring the continuity and stability of power transmission. In addition, the parallel groove clamp also plays an important role in the layout optimization of the power network. Especially in non-straight tower structures, it is often used for jumper connections, that is, connecting conductors between towers with different heights or directions, which is crucial for maintaining the flexibility and reliability of the power system. Through precise installation and adjustment, the parallel groove clamp can effectively reduce line losses and improve the power transmission efficiency.

[0003] In the high-risk and high-tech power maintenance activity of live working, the live connection operation of the parallel groove clamp is one of its core contents. This requires operators to have a high level of professional skills and strict operation procedures to ensure the safe and rapid completion of conductor connection without power interruption, thereby minimizing the impact on user power supply.

[0004] The insulating protective cover of the parallel groove clamp is wrapped around the parallel groove clamp. Its main function is to prevent electric shock accidents caused by wire breakage or short circuit. Its design and installation are directly related to the safety and reliability of the power system. Currently, in the mechanical property detection standards for products such as insulating protective covers and shielding covers, only the tests on the mechanical properties of the materials for making the protective covers themselves are specified, and there are no tests on the mechanical properties of the overall structure of the protective covers.

[0005] After retrieval, the application publication number CN115524518A discloses a detection workbench for the insulation performance of strain clamps, specifically disclosing: including a workbench, a mounting plate is fixedly connected to the middle of the top of the workbench, a protective fence is fixedly connected to one side of the top of the mounting plate, the protective fence is arranged in a concave structure. Under the limiting effect of the moving groove, the active slider descends linearly, driving the driven slider to descend synchronously, so that the protective cover descends until it abuts against the groove, which is convenient for sealing and covering the strain clamp during the detection of the strain clamp. During the covering process of the protective cover, the buffer assembly pushes the insulation detector downward. However, this prior art mainly targets strain clamps. The main functions of strain clamps are to fix conductors, bear the conductor tension, and hang the conductors on the strain string group or the tower; while the parallel groove clamp is mainly used to connect two parallel conductors to transfer electrical loads. Therefore, this prior art is not applicable to parallel groove clamps.

[0006] The application publication number CN113670728A discloses a toughness detection device for electric wires and cables with a pneumatic clamping structure and its implementation method, specifically disclosing: including a detection box body, a protective cover and a detection mechanism. The protective cover is fixedly connected to the front side of the detection box body. The protective cover is used to observe and protect the interior of the detection box body. Placement holes are opened on both sides of the protective cover, and a transparent observation window is arranged on the front side of the protective cover. The bottom of the transparent observation window is movably connected to a movable door through a hinge. The detection mechanism is located inside the detection box body and is composed of a fixing component and an adjusting component. By stretching the position where the cable is clamped through the adjusting component, the purpose of automatically detecting toughness can be achieved; when the motor rotates, the threaded sleeve can move on the surface of the threaded rod. During the movement of the threaded rod, the cylinder will be driven to move, so that the cylinder drives the upper fixing plate to move. At the same time, the threaded sleeve drives the connecting rod to move, the connecting rod drives the sliding sleeve to move, the sliding sleeve drives the support rod to move, and the support rod drives the lower fixing plate to move, achieving the purpose of synchronous movement of the upper fixing plate and the lower fixing plate. However, this prior art is a device for detecting the toughness of electric wires and cables and cannot clamp parallel groove clamps. Therefore, this prior art cannot be used for parallel groove clamp tests.

[0007] Therefore, how to design a device and method for testing the mechanical properties of the insulation protective cover of parallel groove clamps is a technical problem to be solved. Summary of the Invention

[0008] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a mechanical property test device and test method for the insulation protective cover of parallel groove clamps.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] According to an aspect of the present invention, there is provided a mechanical property test device for the insulating cover of a parallel groove clamp, which tests the mechanical properties of the insulating cover and includes a frame, a movable test part, and a simulated cable assembly, a sliding assembly, and a fixed test part installed on the frame. The movable test part is slidably installed on the sliding assembly; the insulating cover is installed on the simulated cable assembly, and the movable test part and the fixed test part are respectively fixed on both sides of the insulating cover; the movable test part includes a tensiometer. When the movable test part slides away from the fixed test part until the insulating cover is damaged, the reading of the tensiometer is the maximum load-bearing capacity of the insulating cover.

[0011] As a preferred technical solution, the simulated cable assembly includes a simulated cable support and a simulated cable. The simulated cable support includes two support rods, and the two support rods respectively support one end of the simulated cable. The insulating cover is wrapped around the outside of the simulated cable.

[0012] As a preferred technical solution, the frame includes a horizontal frame and a vertical frame that are perpendicular to each other and connected by one side. The simulated cable assembly and the fixed test part are installed on the vertical frame, and the sliding assembly is installed on the horizontal frame.

[0013] As a preferred technical solution, the movable test part further includes a first suction cup holder and a first slider. The first slider is slidably installed on the sliding assembly. Two support plates are provided on the first slider, and the first suction cup holder and the test end of the tensiometer are respectively connected to the two support plates; the first suction cup holder includes a first suction cup, and the first suction cup sucks one side of the insulating cover.

[0014] As a preferred technical solution, the sliding assembly includes a moving part and a driving part. The movable test part is installed on the moving part, and the driving part is connected to the moving part.

[0015] As a preferred technical solution, the moving part includes a guide rail support, a guide rail, and a second slider. The guide rail support is fixed on the frame, the guide rail is installed on the guide rail support, the second slider forms a moving pair with the guide rail, and the movable test part is installed on the second slider.

[0016] As a preferred technical solution, the driving part includes a handwheel mounting frame, a handwheel, and a lead screw. The handwheel is mounted on the handwheel mounting frame; a threaded hole is provided on the second slider, and one end of the lead screw is installed at the center of the handwheel, and the other end is matched with the threaded hole on the second slider.

[0017] As a preferred technical solution, the fixed test part includes a second suction cup holder. The second suction cup holder includes a second suction cup, and the second suction cup sucks the side of the insulating cover away from the movable test part.

[0018] According to another aspect of the present invention, there is provided a test method using the mechanical property test equipment for the insulation protective cover of the parallel groove clamp as described in any one of claims 1 to 8, specifically including the following steps:

[0019] Step S1: Install the insulation protective cover on the simulated cable assembly, and fixedly connect the test part and the movable test part to one side of the insulation protective cover respectively.

[0020] Step S2: Move the movable test part until the insulation protective cover is damaged.

[0021] Step S3: Read the indication on the tensiometer.

[0022] Step S4: Calculate the maximum wind force that the insulation protective cover can withstand according to the indication.

[0023] As a preferred technical solution, step S4 is specifically: the maximum wind pressure that the insulation protective cover can withstand wherein, F is the tension shown by the tensiometer, and S is the contact area between the movable test part and the insulation protective cover; the maximum wind speed that the insulation protective cover can withstand wherein, ρ is the air density; judge the wind force level according to the maximum wind speed v.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1) By pulling the insulation protective cover from both sides by the movable test part and the fixed test part respectively, the present invention measures the maximum load-bearing capacity of the insulation protective cover, and solves the problem of detecting and evaluating the overall load-bearing capacity of the simulated insulation protective cover in the use environment.

[0026] 2) The present invention uses a simulated cable assembly, which can simulate the real working conditions of the insulation protective cover and make the test results more accurate; uses a moving part and a driving part to drive the movement of the movable test part, and the movable test part and the fixed test part use suction cups to fix the insulation protective cover to simulate the wind force situation, which is convenient, intuitive and the test process is convenient.

[0027] 3) The present invention can calculate the maximum wind force that can be withstood through the maximum tension that the insulation protective cover can withstand, and provides a test method that can effectively evaluate the insulation protective cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a mechanical property test equipment for the insulation protective cover of a parallel groove clamp according to the present invention;

[0029] Figure 2 It is a front view of a mechanical property test equipment for the insulation protective cover of a parallel groove clamp according to the present invention;

[0030] Figure 3Partial schematic diagram of the installation structure of the simulated cable assembly of the present invention;

[0031] Figure 4 Flowchart of the mechanical property test method for the insulating protective cover of the parallel groove clamp of the present invention;

[0032] As shown in the figure by the reference numerals:

[0033] 1. Frame, 2. Insulating protective cover, 3. Simulated cable support, 4. Simulated cable, 5. First suction cup, 6. First suction cup holder, 7. Tensile meter, 8. Guide rail, 9. Guide rail support, 10. Handwheel, 11. Handwheel mounting bracket, 12. Second slider, 13. First slider, 14. Second suction cup holder, 15. Second suction cup. Specific implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] As Figure 1 and Figure 2 shown, this embodiment provides a mechanical property test device for the insulating protective cover of the parallel groove clamp to test the mechanical properties of the insulating protective cover 2, including a frame 1, a movable test part, a simulated cable assembly, a sliding assembly, and a fixed test part.

[0037] The frame 1 includes a horizontal frame and a vertical frame that are perpendicular to each other. One side of the horizontal frame is connected to one side of the vertical frame. The simulated cable assembly and the fixed test part are installed on the vertical frame, and the movable test part and the sliding assembly are installed on the horizontal frame. The horizontal frame and the vertical frame can be connected by welding or detachably connected by using connecting parts. The simulated cable assembly and the fixed test part are connected to the vertical frame by bolts, and the simulated cable assembly is located above the fixed test part.

[0038] The horizontal frame and the vertical frame can be made of steel or aluminum alloy materials. For example, steel can be selected as I-beam, channel steel, etc. The frame structure made of steel is stable and reliable; aluminum alloy has a lighter weight, higher strength, and good corrosion resistance, and the frame made of aluminum alloy is more lightweight.

[0039] As Figure 3As shown in the figure, the analog cable assembly includes an analog cable bracket 3 and an analog cable 4. The analog cable bracket 3 includes two support rods, which are respectively installed on both sides of the vertical frame and perpendicular to the vertical frame. Both ends of the analog cable 4 are placed on the two support rods and can slide freely on the support rods in the front, rear, left, and right directions. The insulating protective cover 2 is wrapped around the outside of the analog cable 4.

[0040] One end of the two support rods is larger and is provided with mounting holes. Bolts pass through the mounting holes and are fixed on the vertical frame; the two support rods are installed at the same height.

[0041] The analog cable 4 can be an aluminum rod with a diameter of 6 mm. The aluminum rod with a diameter of 6 mm takes into account both the material cost-effectiveness and processing convenience while ensuring sufficient strength and electrical conductivity. Compared with other material or size selections, it can not only meet the requirements of current transmission but also does not increase unnecessary weight or space occupation due to excessive size.

[0042] In addition, the analog cable 4 can also be a copper-core cable.

[0043] The movable test section includes a tensiometer 7, a first suction cup holder 6, and a first slider 13. The first slider 13 forms a moving pair with the guide rail 8 of the sliding assembly. There are two support plates on the first slider 13. The two support plates and the first slider are integrally U-shaped. The first suction cup holder 6 is installed on one of the support plates, and the test end of the tensiometer 7 is connected to the other support plate. The first suction cup holder 6 includes a first suction cup 5, and the first suction cup 5 sucks one side of the insulating protective cover 2. The tensiometer 7 is the core detection instrument, and a digital push-pull tensiometer can be selected for the tensiometer 7.

[0044] The digital push-pull tensiometer, also known as the digital display push-pull tensiometer, is a digital force measurement tool. It is mainly used to test the reaction force generated by materials, products, or equipment when subjected to tensile or compressive forces. It usually consists of two parts: a handheld control end equipped with a weighing pan or fixture and a load cell (also known as a load beam). The load cell forms a closed-loop mechanical system with the item to be tested through external devices (such as tensile testing machines and universal testing machines) for force testing. The digital push-pull tensiometer also includes a digital display screen for displaying the measured force value. The working principle of the digital push-pull tensiometer is based on the load beam. The load beam is a beam-like object made of metal materials. When detecting a certain tension or being compressed, it will undergo a small deformation in the cross-section and symmetrically generate strain at the four corners. These strains are converted into electrical signals after linear compensation and then transmitted to the indicator for numerical display. The digital push-pull tensiometer has the advantages of high precision, simple operation, easy movement, and installation.

[0045] The fixed test section includes a second suction cup holder 14. The second suction cup 15 is installed on a vertical bracket. The second suction cup holder 14 includes a mounting portion, a connecting portion, and the second suction cup 15. The mounting portion is provided with mounting holes and is connected to the vertical bracket by bolts, located below the support rod. One end of the connecting portion is connected to the mounting portion, and the other end is connected to the second suction cup 15. The second suction cup 15 sucks the other side of the insulating protective cover 2, that is, the fixed test section and the movable test section are respectively located on one side of the insulating protection plate.

[0046] The first suction cup 5 and the second suction cup 15 can be circular vacuum suction cups, oval vacuum suction cups, elliptical vacuum suction cups or corrugated suction cups.

[0047] The characteristic of the corrugated suction cup is that the surface of the suction cup has a corrugated structure. This structure makes the corrugated suction cup have higher flexibility and adaptability when adsorbing objects. The disk skin of the corrugated suction cup has multiple corrugations and can be subdivided into two-layer, three-layer or multi-corrugation vacuum suction cups. This design increases the contact area between the suction cup and the object surface, improves the sealing performance and adsorption effect. Due to the longer disk skin of the corrugated suction cup, it has a certain buffering capacity and can perform height compensation to adapt to objects of different heights. Compared with flat vacuum suction cups, corrugated vacuum suction cups can adjust the vertical angle during adsorption, making it easier to adapt to uneven surfaces.

[0048] The negative pressure of the first suction cup 5 and the second suction cup 15 can be provided by an external vacuum generator or a vacuum pump.

[0049] When using a vacuum generator, an electromagnetic valve is usually used to control the on-off of the vacuum generator, so as to achieve precise control of the adsorption and release of the vacuum suction cup. When the electromagnetic valve is energized, compressed air is allowed to enter the vacuum generator to generate vacuum, and the suction cup sucks the object. When it is necessary to release the object, the electromagnetic valve is de-energized, and the originally closed air interface is opened, and the atmosphere immediately rushes into the suction cup, quickly returning to normal pressure. The pressure inside and outside the suction cup is balanced, and the adsorption force is lost, and the object can be released smoothly.

[0050] When using a vacuum pump, the air inside the suction cup is pumped out mechanically to form a stable negative pressure state. Its specific working principle is as follows: The vacuum pump is connected to the suction cup, and the air inside the suction cup is continuously compressed through an internal mechanical structure (such as a piston, a blade, etc.); the compressed air is discharged outside the pump, thereby reducing the air pressure inside the suction cup; when the air pressure inside the suction cup is lower than the external atmospheric pressure, a negative pressure is formed, enabling the suction cup to firmly adsorb the object.

[0051] The negative pressure generated by the vacuum pump is usually more stable than that of the vacuum generator and can generate a stronger adsorption force. However, due to the need for additional vacuum pump equipment, the cost is relatively high.

[0052] The sliding component includes a moving part and a driving part, and the driving part is connected to the moving part. The moving part includes a guide rail bracket 9, a guide rail 8 and a second slider 12. The guide rail bracket 9 is fixed on the horizontal frame of the machine frame 1, the guide rail 8 is installed on the guide rail bracket 9, and the second slider 12 forms a moving pair with the guide rail 8. The movable test part is installed on the second slider 12. The driving part includes a handwheel mounting bracket 11, a handwheel 10 and a lead screw. The handwheel mounting bracket 11 is installed at one end of the horizontal frame of the machine frame 1, the handwheel 10 is installed on the handwheel mounting bracket 11. The second slider 12 is integrally U-shaped, with a threaded hole provided at one end of the U shape, and a mounting plate provided above. The movable test part is installed on the mounting plate. One end of the lead screw is installed at the center of the handwheel 10, and the other end is matched with the threaded hole on the second slider 12.

[0053] There is a variety of design solutions for the driving part, and a linear motor can also be selected. Different from traditional rotary motors, a linear motor drives a load by directly generating thrust or pulling force in a linear direction, without the need for an intermediate conversion mechanism (such as a lead screw, gear, etc.) to achieve linear motion, thereby reducing losses during the energy transfer process and improving the overall efficiency and accuracy of the system. The application of a linear motor can significantly improve the dynamic response speed of the driving part because it can achieve rapid start, stop and reverse motion. In addition, the structure of a linear motor is relatively simple, reducing the complexity and cost of maintenance, and also providing greater flexibility for system integration.

[0054] Embodiment 2

[0055] As Figure 4 shown, this embodiment provides a method for testing the mechanical properties of an insulation protective cover for parallel groove clamp, using the test equipment in Embodiment 1, including the following steps:

[0056] Step S1, install the insulation protective cover 2 on the simulated cable assembly, and fix the test part and the movable test part to be respectively connected to one side of the insulation protective cover 2;

[0057] Step S2, move the movable test part until the insulation protective cover 2 is damaged;

[0058] Step S3, read the indication on the tensiometer 7;

[0059] Step S4, calculate the maximum wind force that the insulation protective cover 2 can withstand according to the indication.

[0060] The specific operation process of the above steps is as follows:

[0061] Install the insulating protective cover 2 on the simulated cable assembly. Pass an aluminum rod with a diameter of 6 mm, which serves as the simulated cable, through the insulating protective cover 2 and place them together on the simulated cable assembly to simulate the installation state on the actual line. Adjust the position so that the second suction cup 15 of the fixed test part and the first suction cup 5 of the movable test part are respectively fixed on one side of the insulating protective cover 2. Confirm that the reading of the tensiometer 7 with no load is 0. Rotate the handwheel 10 to apply a simulated wind pressure to the insulating protective cover 2 to generate a force inside the insulating protective cover 2. The maximum tensile force value when the fixing pin of the insulating protective cover 2 disengages is the maximum load-bearing capacity of the insulating protective cover 2. Convert the design minimum limit value of the mechanical load capacity of the insulating protective cover 2 into the judgment value of the tensile test. When the test value is greater than the design expected value of the insulating protective cover 2, the insulating protective cover 2 is qualified.

[0062] Table 1 shows the specific data parameters for the classification of each wind force level according to the national standard "Wind Force Levels" issued in June 2012 in China and the relevant supplementary regulations of the China Meteorological Administration. The table lists the wind force levels from level 0 to level 17 and the corresponding wind speed ranges (in meters per second and kilometers per hour). These data are the wind speed values measured at a height of 10 meters in a standard meteorological observation field. The 18th level of wind force is an informal classification, usually used to describe extremely large typhoons exceeding the 17th level standard. Its wind speed value is greater than 61.2 m / s, or greater than 220 km / h.

[0063] Table 1 Data Table for Wind Force Level Classification

[0064]

[0065] The wind force levels are scientifically classified according to the specific values of wind speed. This standard helps people quantitatively understand and evaluate the intensity of the wind. At the same time, wind pressure, as an important physical effect of the wind, can be estimated through specific formulas and known wind speed values. This estimation is based on the principles of aerodynamics, taking into account parameters such as wind speed and air density, enabling us to more accurately predict and calculate the pressure exerted by the wind on specific equipment under specific wind speed conditions.

[0066] For example: The wind speed of a level 10 typhoon is generally between 24.5 and 28.4 meters per second. Wind pressure P = 0.5 × ρ × v 2 , where ρ is the air density (about 1.225 kg / m3 under standard sea-level pressure and temperature), and v is the wind speed; therefore, taking the wind speed of a level 10 typhoon as 26.5 m / s (the middle value of the range from 24.5 to 28.4 m / s), we can calculate the wind pressure as follows:

[0067] P = 0.5 × 1.225 × 26.5 2 ≈428.47 Pa

[0068] Therefore, the wind pressure of a typhoon of level 10 is approximately 428 Pa, which is about 0.000428 MPa.

[0069] Therefore, when a typhoon of level 10 blows, the maximum pressure that may be borne inside the insulating protective cover 2 is 428 Pa.

[0070] The relationship between pressure and force can be expressed by the following formula:

[0071]

[0072] Pressure refers to the magnitude of the force exerted per unit area, usually denoted by P, and the unit is Pascal. 1 Pa = 1 N / m 2 . The acting area refers to the surface area of the insulating cover to be tested that bears the wind load. And the force is the force acting on an object, and the unit is usually Newton. This force is the minimum limit tensile value for judging whether the test is qualified. By comparing the test tensile value with the minimum limit tensile value, if the test tensile value is greater than the minimum limit tensile value, then the insulating protective cover 2 meets the design requirements.

[0073] The present invention solves the problem of detecting and assessing the overall load-bearing capacity of the insulating protective cover under the use environment by designing a mechanical property test device and test method for the insulating protective cover of the parallel groove clamp.

[0074] By pulling the insulating protective cover from both sides by the movable test part and the fixed test part respectively, the maximum load-bearing capacity of the insulating protective cover is measured, and the problem of detecting and assessing the overall load-bearing capacity of the insulating protective cover under the use environment is solved; the simulated cable assembly can simulate the real working condition of the insulating protective cover, making the test result more accurate; the movable part and the driving part are used to drive the movement of the movable test part, and the movable test part and the fixed test part use suction cups to fix the insulating protective cover, simulating the wind situation, which is convenient, intuitive and the test process is convenient; the maximum wind force that can be borne can be calculated from the maximum tensile force that the insulating protective cover can withstand, providing an effective test method for evaluating the insulating protective cover.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0076] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0077] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0078] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A mechanical property test device for the insulating protective cover of a parallel groove clamp, which tests the mechanical properties of the insulating protective cover (2), is characterized in that It includes a frame (1), a movable test part, a simulated cable assembly, a sliding assembly and a fixed test part mounted on the frame (1). The movable test part is slidably mounted on the sliding assembly; an insulating protective cover (2) is mounted on the simulated cable assembly, and the movable test part and the fixed test part are respectively fixed on both sides of the insulating protective cover (2); the movable test part includes a tensiometer (7). The movable test part slides away from the fixed test part. When it slides to the point where the insulating protective cover (2) is damaged, the reading of the tensiometer (7) is the maximum load-bearing capacity of the insulating protective cover (2).

2. The mechanical property test equipment for the insulating protective cover of the parallel groove clamp according to claim 1, characterized in that, The simulated cable assembly includes a simulated cable support (3) and a simulated cable (4). The simulated cable support (3) includes two support rods, and the two support rods respectively support one end of the simulated cable (4). The insulating protective cover (2) is wrapped outside the simulated cable (4).

3. The mechanical property test equipment for the insulating protective cover of the parallel groove clamp according to claim 1, characterized in that, The frame (1) includes a horizontal frame and a vertical frame that are perpendicular to each other and connected by one side. The simulated cable assembly and the fixed test part are mounted on the vertical frame, and the sliding assembly is mounted on the horizontal frame.

4. The mechanical property test equipment for the insulating protective cover of the parallel groove clamp according to claim 1, wherein, The movable test part further includes a first suction cup holder (6) and a first slider (13). The first slider (13) is slidably mounted on the sliding assembly. There are two support plates on the first slider (13), and the first suction cup holder (6) and the test end of the tensiometer (7) are respectively connected to the two support plates; the first suction cup holder (6) includes a first suction cup (5), and the first suction cup (5) sucks one side of the insulating protective cover (2).

5. The mechanical property test equipment for the insulating protective cover of the parallel groove clamp according to claim 1, characterized in that, The sliding assembly includes a moving part and a driving part. The movable test part is mounted on the moving part, and the driving part is connected to the moving part.

6. The mechanical property test equipment for the insulating protective cover of the parallel groove clamp according to claim 5, characterized in that, The moving part includes a guide rail support (9), a guide rail (8) and a second slider (12). The guide rail support (9) is fixed on the frame (1), the guide rail (8) is mounted on the guide rail support (9), the second slider (12) forms a moving pair with the guide rail (8), and the movable test part is mounted on the second slider (12).

7. An mechanical property test equipment for insulating protective cover of parallel groove clamp according to claim 6, characterized in that, The driving part includes a handwheel mounting bracket (11), a handwheel (10) and a lead screw. The handwheel (10) is mounted on the handwheel mounting bracket (11); there is a threaded hole on the second slider (12), one end of the lead screw is mounted at the center of the handwheel (10), and the other end is matched with the threaded hole on the second slider (12).

8. The mechanical property test equipment for the insulating protective cover of the parallel groove clamp according to claim 1, characterized in that, The fixed test part includes a second suction cup holder (14). The second suction cup holder (14) includes a second suction cup (15), and the second suction cup (15) sucks the side of the insulating protective cover (2) away from the movable test part.

9. A test method using the mechanical property test equipment for the insulating protective cover of the parallel groove clamp described in any one of claims 1 to 8, characterized in that, Specifically, it includes the following steps: Step S1, install the insulating protective cover (2) on the simulated cable assembly, and the fixed test part and the movable test part are respectively connected to one side of the insulating protective cover (2); Step S2, move the movable test part until the insulating protective cover (2) is damaged; Step S3, read the reading on the tensiometer (7); Step S4, calculate the maximum wind force that the insulating protective cover (2) can withstand according to the reading.

10. The test method according to claim 9, wherein The specific steps of step S4 are as follows: the maximum wind pressure that the insulating protective cover (2) can withstand where F is the tensile force indicated by the tensiometer (7), and S is the contact area between the movable test part and the insulating protective cover (2); the maximum wind speed that the insulating protective cover (2) can withstand where ρ is the air density; determine the wind force level according to the maximum wind speed v.

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