A high-voltage-grade electrical equipment mechanical strength test system

Abstract

The application relates to a high-voltage-grade electrical equipment mechanical strength test system, wherein horizontal loading mechanisms and vertical loading mechanisms are arranged on both sides of a frame, the horizontal loading mechanisms comprise horizontal loading ropes, the vertical loading mechanisms comprise vertical loading ropes; a connecting frame comprises horizontal loading shafts and vertical guide shafts, the two ends of the horizontal loading shafts are provided with connecting frame guide wheels; horizontal guide wheels are arranged on both sides of the middle part of the frame, first vertical guide wheels are arranged on both sides of the top end of the frame, second vertical guide wheels are arranged in the middle part of the frame, one end of the horizontal loading rope is fixed at the bottom end of the frame, the other end of the horizontal loading rope is connected with a horizontal loading assembly after sequentially passing through the horizontal guide wheels and the connecting frame guide wheels, one end of the vertical loading rope is fixedly connected with a primary terminal after penetrating through the vertical guide shaft, the other end of the vertical loading rope is connected with a vertical loading assembly after sequentially passing through the second vertical guide wheel and the first vertical guide wheel. The application can meet the mechanical strength test needs of different high-voltage-grade electrical equipment, and can flexibly adjust the load loading mode according to needs.

Description

Technical Field

[0001] This invention relates to the field of power equipment testing technology, specifically a mechanical strength testing system for high-voltage electrical equipment. Background Technology

[0002] High-voltage electrical equipment (such as current transformers, voltage transformers, electromagnetic voltage transformers, reactors, and high-voltage bushings) is a critical component of the power grid, and its mechanical reliability is paramount. For high-voltage electrical equipment of 72.5kV and above, the static loads during operation include loads caused by wind and icing. Therefore, mechanical strength tests typically require applying loads to the primary terminals in at least two directions, including horizontal (e.g., simulating horizontal wind force) and vertical (e.g., simulating the gravity of icing). Furthermore, oil-immersed high-voltage electrical equipment uses a specified insulating medium; for example, gas-insulated high-voltage electrical equipment requires filling with a specified gas or gas mixture at its rated pressure. This necessitates that the high-voltage electrical equipment be installed correctly and that the test be conducted under normal operating conditions with vertical installation and fixation. Moreover, for high-voltage electrical equipment of different voltage levels or sizes, the height of the primary terminals varies, requiring consideration of how to adapt to connections with terminals of different heights.

[0003] However, existing testing equipment is mostly single-directional presses or tensile testing machines. Firstly, they can only perform unidirectional loading and cannot simulate the complex multidimensional stress states of electrical equipment in actual operation, resulting in incomplete test results. Secondly, the fixed connecting fixture structure in existing testing equipment makes it difficult to adapt to high-voltage electrical equipment with different heights, diameters, and installation structures, and adjustments are relatively cumbersome when changing workpieces. Thirdly, existing testing equipment has limited measurement accuracy and adjustment flexibility, and data acquisition largely relies on manual labor, which is inefficient and prone to introducing human error. Summary of the Invention

[0004] The purpose of this invention is to provide a mechanical strength testing system for high-voltage electrical equipment, which can meet the mechanical strength testing needs of different high-voltage electrical equipment and can flexibly adjust the load loading method as needed.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A mechanical strength testing system for high-voltage electrical equipment includes a frame and a connecting frame. The frame has a fixed platform at its bottom for fixing the lower end of a test sample, and the connecting frame is fixed to a primary terminal at the upper end of the test sample. The frame has a horizontal loading mechanism and a vertical loading mechanism on both sides. The horizontal loading mechanism includes a horizontal loading rope, and the vertical loading mechanism includes a vertical loading rope. The connecting frame includes a horizontal loading shaft and a vertical guide shaft, with connecting frame guide wheels at both ends of the horizontal loading shaft. Horizontal guide wheels are located on both sides of the middle section of the frame, and first vertical guide wheels are located on both sides of the top of the frame, and a second vertical guide wheel is located in the middle section. One end of the horizontal loading rope is fixed to the bottom of the frame, and the other end passes sequentially around the corresponding horizontal guide wheel and connecting frame guide wheel before connecting to the corresponding horizontal loading component. One end of the vertical loading rope passes through the vertical guide shaft and is fixed to the primary terminal, and the other end passes sequentially around the corresponding second vertical guide wheel and first vertical guide wheel before connecting to the corresponding vertical loading component.

[0007] The frame has a height-adjustable first side support beam in the middle, and the horizontal guide wheel is installed on the first side support beam on the corresponding side; the top of the frame has top support beams on both sides, and the two top support beams are connected by a connecting beam; the first vertical guide wheel is installed on the top support beam on the corresponding side, and the second vertical guide wheel is installed in the middle of the connecting beam; the bottom beams on both sides of the bottom of the frame are provided with fixing rings, and one end of the horizontal loading rope is fixed to the fixing ring.

[0008] The horizontal loading shaft has an opening on its lower surface. In addition, the side wall and lower surface of the horizontal loading shaft are provided with shaft holes. The connecting bolt passes through the corresponding shaft hole and is threaded to the corresponding terminal hole on the primary terminal. The vertical loading rope passes through the vertical guide shaft and is connected to the corresponding terminal hole on the primary terminal.

[0009] The fixed platform is provided with clamping block grooves and clamping blocks. The clamping block grooves include multiple groove tracks arranged in a cross shape, and each clamping block is movable and adjustable in its corresponding groove track. The lower end of the test sample is clamped and limited by each clamping block.

[0010] The slide rail adopts an inverted T-shaped cross-section structure, and slide rail protrusions are formed on both sides of the slide rail. The clamping block includes an upper clamping block and a lower clamping block. The upper clamping block is located on the upper surface of the fixed platform, and the lower clamping block is located in the slide rail and below the slide rail protrusions. The locking bolt is threaded into the upper clamping block, and the lower end of the locking bolt is fixedly connected to the lower clamping block.

[0011] An auxiliary loading mechanism is provided in the middle of the frame, which includes an auxiliary loading rope and an auxiliary guide wheel; a second side support beam with adjustable height is provided in the middle of the frame, and the auxiliary guide wheel is provided on the second side support beam; one end of the auxiliary loading rope is connected to the primary terminal, and the other end passes around the auxiliary guide wheel and is connected to the auxiliary loading assembly.

[0012] When the horizontal loading component and the vertical loading component are loaded manually, the horizontal loading component is a horizontal loading weight component and the vertical loading component is a vertical loading weight component. The horizontal loading weight component and the vertical loading weight component have the same structure, both including a weight tray and open weights. The weight tray has a weight shaft in the middle. Each open weight is stacked on the weight tray in sequence, and the weight shaft passes through the bottom of the opening of each open weight in sequence. The bottom of the opening is located at the center of the open weight.

[0013] Automatic loading components are provided on both sides of the fixed platform, and the automatic loading components are all housed within the frame. Each automatic loading component includes a loading base, a motor, a lead screw, a lead screw nut, a loading slide, and a force sensor. The motor and the lead screw are both mounted on the loading base, and the lead screw is driven to rotate by the motor. The loading slide is slidably connected to the loading base. The lead screw nut is fitted onto the lead screw and connected to the lower surface of the loading slide. The force sensor is located on the loading slide. The horizontal loading rope and the vertical loading rope are connected to the corresponding force sensors on the loading slide.

[0014] Both sides of the fixed platform are equipped with loading protective covers, and the automatic loading components are respectively located in the loading protective covers on the corresponding sides.

[0015] The test sample is equipped with a displacement sensor, and the frame is equipped with a laser; the entire frame is housed in a transparent protective cover, and the transparent protective cover is equipped with a sealed door that can be opened.

[0016] The advantages and positive effects of this invention are as follows:

[0017] 1. This invention utilizes a connecting frame to connect with the primary terminal at the upper end of the test sample. The horizontal loading rope in the horizontal loading mechanism transmits torque through the horizontal loading shaft of the connecting frame, thereby achieving horizontal loading on the primary terminal. The vertical loading rope in the vertical loading mechanism passes through the vertical guide shaft of the connecting frame and connects to the primary terminal, thereby achieving vertical loading on the primary terminal. At the same time, the connecting frame can be used for cases where the primary terminal is vertically located at the upper end of the test sample or for cases where the primary terminal is horizontally located on one side of the upper end of the test sample, thus enabling this invention to meet the testing needs of electrical equipment of different high voltage levels.

[0018] 2. The fixed platform at the lower end of the frame of this invention is provided with clamping block grooves and clamping blocks. The clamping block grooves include multiple groove tracks arranged in a star shape, and each clamping block is respectively located in the corresponding groove track. In this way, this invention can meet the positioning requirements of the lower base of electrical equipment of different high voltage levels by utilizing the above-mentioned clamping blocks. When the primary terminal is horizontally located on one side of the upper end of the test sample, the clamping blocks on one side of the clamping block groove can be relatively outward, and the clamping blocks on the other side can be relatively inward. This can achieve eccentric locking of the lower base of the test sample, thereby ensuring that the horizontal and vertical loading ropes can be aligned with the connecting frame and the corresponding guide wheels. In addition, the frame of this invention is also provided with a height-adjustable first side support beam and a second side support beam in the middle, which can flexibly adjust the height of the corresponding guide wheels according to the height of the primary terminal of the test sample. Therefore, this invention can further ensure that the testing needs of electrical equipment of different high voltage levels are met through the above structural design.

[0019] 3. This invention allows for flexible adjustment of the load loading method as needed. When using a manual loading method, the horizontal loading component can be a horizontal loading weight component, and the vertical loading component can be a vertical loading weight component. Both the horizontal and vertical loading weight components include a weight tray and open weights. By flexibly placing and removing open weights of appropriate weights, the load adjustment needs of the horizontal and vertical loading ropes can be met. When using an automatic loading component, the horizontal and vertical loading ropes are connected to a force sensor on the automatic loading component. The force sensor is located on a loading slide, and the loading slide is driven to move by a motor screw and nut assembly to achieve the loading function. The motor screw and nut assembly can precisely control the movement distance, and the force sensor can detect the loading force value in real time.

[0020] 4. The present invention also includes an auxiliary loading mechanism to further meet the test requirements. In particular, when the primary terminal is horizontally positioned on one side of the upper end of the test sample, in addition to horizontal and vertical loading, the primary terminal usually needs to be loaded along the length direction. At this time, one end of the auxiliary loading rope in the auxiliary loading mechanism is fixed in the corresponding terminal hole on the primary terminal, and the other end passes around the auxiliary guide wheel and is connected to the auxiliary loading mechanism, thereby further ensuring that the present invention can realize the simulation of the multi-dimensional stress state of the test sample.

[0021] 5. This invention allows for the attachment of displacement sensors to appropriate locations on the test sample as needed. It can also employ devices such as laser instruments to monitor parameters like deformation and offset (deflection) of the test sample in real time, further ensuring more comprehensive test results. Furthermore, both sides of the fixed platform are equipped with loading protective covers, and the automatic loading components are respectively housed within the corresponding loading protective covers. This prevents sample fragments from affecting the automatic loading components in the event of sample breakage. Additionally, the entire frame of this invention can be housed within a transparent protective cover, ensuring the safety of personnel and on-site equipment while not hindering experimental observation.

[0022] 6. The present invention utilizes a connecting frame to connect with the primary terminal at the upper end of the test sample, and uses a clamping block on the fixed platform to limit the position of the lower base of the test sample. Therefore, it will not damage the overall structure of the test sample. In addition, the frame of the present invention can be set up in a transparent protective cover for protection. Therefore, the present invention can meet the testing needs of equipment such as oil-immersed high-voltage electrical equipment with internal insulating media. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 for Figure 1 An enlarged schematic diagram of the central structure of this invention.

[0025] Figure 3 for Figure 1 An enlarged schematic diagram of the lower structure of the present invention.

[0026] Figure 4 for Figure 3 AA view in

[0027] Figure 5 for Figure 4 A schematic diagram of the structure of the automatically loaded component in the middle.

[0028] Figure 6 for Figure 1 Installation diagram of the first side support beam.

[0029] Figure 7 This is a schematic diagram of the connection of the connector frame of the present invention for another primary terminal structure.

[0030] Figure 8 for Figure 7 A schematic diagram showing the application of a load along the length of a primary terminal.

[0031] Figure 9 for Figure 4 A schematic diagram showing the fit between the middle clamping block and the clamping block groove.

[0032] Among them, 1 is the frame, 101 is the first side support beam, 102 is the top support beam, 103 is the connecting beam, 104 is the bottom beam, 1041 is the fixing ring, 105 is the second side support beam, and 106 is the height adjustment hole; 2 is the horizontal loading mechanism, 201 is the horizontal loading rope, 202 is the horizontal guide wheel, and 203 is the horizontal loading weight assembly; 3 is the vertical loading mechanism, 301 is the vertical loading rope, 302 is the first vertical guide wheel, 303 is the second vertical guide wheel, and 304 is the vertical loading weight assembly; 4 is the connecting frame, 401 is the connecting frame guide wheel, 402 is the horizontal loading shaft, and 403 is the vertical... Straight guide shaft; 5 is a fixed platform, 501 is a clamping block groove, 5011 is a groove protrusion, 502 is a clamping block, 5021 is an upper clamping block, 5022 is a lower clamping block, 503 is a locking bolt; 6 is a test sample, 601 is a primary terminal; 7 is an automatic loading assembly, 701 is a motor, 702 is a lead screw, 703 is a force sensor, 704 is a lead nut, 705 is a slide rail, 706 is a slider, 707 is a control system, 708 is a loading slide; 8 is a loading protective cover; 9 is an auxiliary loading mechanism, 901 is an auxiliary loading rope, 902 is an auxiliary loading assembly, 903 is an auxiliary guide wheel. Detailed Implementation

[0033] The invention will now be described in further detail with reference to the accompanying drawings.

[0034] like Figures 1-3 As shown, the present invention includes a frame 1 and a connecting frame 4, wherein the bottom of the frame 1 is provided with a fixing platform 5 for fixing the lower end of the test sample 6, and the connecting frame 4 is fixed to the primary terminal 601 at the upper end of the test sample 6; both sides of the frame 1 are provided with a horizontal loading mechanism 2 and a vertical loading mechanism 3, wherein the horizontal loading mechanism 2 includes a horizontal loading rope 201, and the vertical loading mechanism 3 includes a vertical loading rope 301; the connecting frame 4 includes a horizontal loading shaft 402 and a vertical guide shaft 403, wherein the vertical guide shaft 403 is vertically disposed in the middle of the horizontal loading shaft 402, and both ends of the horizontal loading shaft 402 are provided with connecting frame guide wheels 4. 01; Horizontal guide wheels 202 are provided on both sides of the middle part of the frame 1, and first vertical guide wheels 302 are provided on both sides of the top of the frame 1 and second vertical guide wheels 303 are provided in the middle. One end of the horizontal loading rope 201 is fixed on the bottom beam 104 on the corresponding side of the bottom end of the frame 1, and the other end passes through the horizontal guide wheel 202 and the connecting frame guide wheel 401 on the corresponding side in sequence and is connected to the horizontal loading component. One end of the vertical loading rope 301 passes through the vertical guide shaft 403 and is fixed to the primary terminal 601, and the other end passes through the second vertical guide wheel 303 and the first vertical guide wheel 302 on the corresponding side in sequence and is connected to the vertical loading component.

[0035] like Figure 1As shown, in this embodiment, the frame 1 has a first side support beam 101 with adjustable height in the middle, and the horizontal guide wheel 202 is installed on the first side support beam 101 on the corresponding side. Figure 6 As shown, in this embodiment, height adjustment holes 106 are evenly distributed along the height direction on both sides of the uprights of the frame 1, and the two ends of the first side support beam 101 are respectively fixed to the corresponding height adjustment holes 106 by bolts. After unscrewing the bolts, the height of the first side support beam 101 can be adjusted according to the condition of the primary terminal 601 at the upper end of the test sample 6, thereby adjusting the height of the horizontal guide wheel 202. Since the height of the primary terminal of each electrical device has standard requirements, the height of each height adjustment hole 106 is arranged according to the standard of each electrical device.

[0036] like Figure 1 As shown, in this embodiment, the top support beams 102 are provided on both sides of the top of the frame 1, and the two top support beams 102 are connected by a connecting beam 103. The first vertical guide wheel 302 is provided on the top support beam 102 on the corresponding side, and the second vertical guide wheel 303 is provided in the middle of the connecting beam 103.

[0037] like Figure 1 and Figures 3-4 As shown, in this embodiment, fixing rings 1041 are provided on both sides of the bottom beams 104 at the bottom end of the frame 1, and one end of the horizontal loading rope 201 is fixed to the fixing ring 1041. The horizontal loading rope 201 can be directly tied to the fixing ring 1041, or it can be hooked at the end to the fixing ring 1041 for easy installation.

[0038] like Figure 2 As shown, the horizontal loading shaft 402 of the connecting frame 4 is provided with a shaft hole for connecting with the corresponding terminal hole on the primary terminal 601, and the vertical loading rope 301 passes through the vertical guide shaft 403 and connects with the corresponding terminal hole on the primary terminal 601.

[0039] like Figure 2 As shown, in one embodiment of the present invention, the primary terminal 601 is vertically disposed on the upper end of the test sample 6, and the lower surface of the horizontal loading shaft 402 is provided with an opening for the primary terminal 601 to be inserted. The lower end of the vertical loading rope 301 is bound to the terminal hole on the upper side of the primary terminal 601. The connecting bolt is inserted from the outside of the horizontal loading shaft 402 into the corresponding shaft hole on the side wall of the horizontal loading shaft 402 and then threadedly connected to the corresponding terminal hole on the lower side of the primary terminal 601, thereby realizing the connection between the connecting frame 4 and the primary terminal 601. During the horizontal loading test, the horizontal loading rope 201 transmits torque through the horizontal loading shaft 402 to load the primary terminal 601.

[0040] like Figure 7 As shown, in another embodiment of the present invention, the primary terminal 601 is horizontally disposed on one side of the upper end of the test sample 6. The lower side of the horizontal loading shaft 402 of the connecting frame 4 is provided with a shaft hole that connects to the corresponding terminal hole on the primary terminal 601, thereby realizing the connection between the connecting frame 4 and the primary terminal 601. In this way, the horizontal loading rope 201 can still transmit torque through the horizontal loading shaft 402 to load the primary terminal 601. The vertical loading rope 301 passes through the middle of the vertical guide shaft 403 and the horizontal loading shaft 402 and connects to the corresponding terminal hole on the primary terminal 601. At this time, the opening at the lower end of the horizontal loading shaft 402 is used for the vertical loading rope 301 to pass through and complete the connection.

[0041] Other examples Figure 8 As shown, when the primary terminal 601 is horizontally positioned on one side of the upper end of the test sample 6, in addition to being loaded using the horizontal loading rope 201 and the vertical loading rope 301, the primary terminal 601 usually also needs to undergo a loading test along its length. To meet these testing requirements, the present invention can provide auxiliary loading mechanisms 9 on the front and rear sides of the middle of the frame 1. The auxiliary loading mechanism 9 includes an auxiliary loading rope 901 and an auxiliary guide wheel 903, wherein... Figure 1 As shown, the frame 1 has a second side support beam 105 with adjustable height on the front and rear sides of the middle section, and the auxiliary guide wheel 903 is provided in the middle of the second side support beam 105. Figure 8 As shown, one end of the auxiliary loading rope 901 is bound to the corresponding terminal hole on the primary terminal 601, and the other end passes around the auxiliary guide wheel 903 and is connected to the auxiliary loading assembly 902. The height adjustment structure of the second side support beam 105 is... Figure 6 The height adjustment structure of the first side support beam 101 is the same.

[0042] like Figure 4 As shown, the fixed platform 5 is provided with clamping block grooves 501 and clamping blocks 502. The clamping block grooves 501 include multiple groove tracks arranged in a star shape, and each clamping block 502 is respectively disposed in the corresponding groove track. Figure 9As shown, in this embodiment, the slide rail adopts an inverted T-shaped cross-section structure, with slide rail protrusions 5011 formed on both sides. The clamping block 502 includes an upper clamping block 5021 and a lower clamping block 5022, both of which have circular outer sides. The upper clamping block 5021 is located on the upper surface of the fixed platform 5, and the lower clamping block 5022 is located in the slide rail and below the slide rail protrusions 5011. A locking bolt 503 is threaded into the upper clamping block 5021, and the lower end of the locking bolt 503 is fixedly connected to the lower clamping block 5022. When the operator tightens the locking bolt 503, causing the lower clamping block 5022 to rise relative to the upper clamping block 5021, the upper clamping block 5021 and the lower clamping block 5022 cooperate to clamp the slide rail protrusions 5011, thereby locking the position of the clamping block 502. Figure 4 As shown, each clamping block 502 works together to limit the corresponding side position of the lower base of the test sample 6, thereby fixing the lower end of the test sample 6. For example... Figure 7 As shown, when the primary terminal 601 is located on one side of the test sample 6, the clamping block 502 on one side of the clamping block groove 501 can be relatively outward, and the clamping block 502 on the other side can be relatively inward. This achieves eccentric locking of the lower base of the test sample 6, thereby ensuring that the horizontal loading rope 201 and the vertical loading rope 301 can be aligned with the connecting frame 4 and the corresponding guide wheel. The present invention can also employ other suitable clamping block 502 locking structures according to actual needs.

[0043] like Figure 1 , Figure 3 and Figure 8 As shown, in one embodiment of the present invention, the horizontal loading component, vertical loading component, and auxiliary loading component 902 can be manually loaded as needed. The horizontal loading component is a horizontal loading weight component 203, the vertical loading component is a vertical loading weight component 304, and the auxiliary loading component 902 is an auxiliary loading weight component. In this embodiment, the horizontal loading weight component 203, vertical loading weight component 304, and auxiliary loading weight component have the same structure, each including a weight tray and open weights. The weight tray has a weight shaft in the center, and the upper end of the weight shaft is fixedly connected to a corresponding loading rope. Open weights are stacked sequentially on the weight tray, and the weight shaft passes sequentially through the bottom of the opening of each open weight. The bottom of the opening is located at the center of the open weight. This structure allows operators to flexibly place and remove open weights of appropriate weights, thereby meeting the needs of load adjustment.

[0044] like Figures 3-5As shown, in another embodiment of the present invention, the horizontal loading component and the vertical loading component can be automatically loaded as needed. In this case, both the horizontal and vertical loading components adopt the structure of the automatic loading component 7. In this embodiment, the automatic loading component 7 includes a loading base, a motor 701, a lead screw 702, a lead nut 704, a loading slide 708, and a force sensor 703. The motor 701 and the lead screw 702 are both mounted on the loading base, and the lead screw 702 is driven to rotate by the motor 701. The loading slide 708 is slidably connected to the loading base. The lead nut 704 is fitted onto the lead screw 702 and connected to the lower surface of the loading slide 708. The force sensor 703 is mounted on the loading slide 708. In this embodiment, the loading base is provided with a slide rail 705, and the lower side of the loading slide 708 is provided with a slider 706 that cooperates with the corresponding slide rail 705, thereby realizing the sliding connection between the loading slide 708 and the loading base. The force sensor 703 is a known technology in the art and is a commercially available product. Additionally... Figure 5 The loading base and force sensor 703 are offset from each other as described above, only to better illustrate the structural composition of the automatic loading component 7.

[0045] In this embodiment, an automatic loading assembly 7 can be installed on each side of the fixed platform 5 as needed. First, one end of the horizontal loading rope 201 is connected to the corresponding force sensor 703 on the loading slide 708. The motor 701 transmits torque through the lead screw 702 and nut 704 to drive the loading slide 708 on the corresponding side to move precisely, thereby achieving the loading purpose of the horizontal loading rope 201. Simultaneously, the force sensor 703 connected to the horizontal loading rope 201 can detect the loading force value in real time. Then, the horizontal loading rope 201 is separated from the force sensor 703, and the outer end of the vertical loading rope 301 is connected to the corresponding force sensor 703 on the loading slide 708. The motor 701 transmits torque through the lead screw 702 and nut 704 to drive the loading slide 708 on the corresponding side to move in the opposite direction, thereby achieving the loading purpose of the vertical loading rope 301. This structural layout can meet the testing needs of individually loading the test sample 6 horizontally and vertically.

[0046] In this embodiment, two sets of automatic loading components 7 can also be set on each side of the fixed platform 5 as needed. One set of automatic loading components 7 is connected to the horizontal loading rope 201 on the corresponding side, and the other set of automatic loading components 7 is connected to the vertical loading rope 301 on the corresponding side, so as to realize the requirement of synchronous horizontal and vertical loading. The loading slide 708 can be equipped with loading platform guide wheels at appropriate positions as needed to meet the turning requirements of the horizontal loading rope 201 and the vertical loading rope 301 after introduction. This can ensure that the loading connection positions of the horizontal loading rope 201 and the vertical loading rope 301 to the connecting frame 4 and the primary terminal 601 remain unchanged, and can also meet the connection requirements of the horizontal loading rope 201 and the vertical loading rope 301 to the force sensor 703 on the corresponding automatic loading component 7.

[0047] In this embodiment, the loading parameters of the automatic loading component 7 include a target loading force of 3800N to 4448N, a loading speed of 0.1mm / s to 1.0mm / s, and a holding time of 60s. Additionally, as... Figure 5 As shown, the motor 701 is connected to the control system 707 to achieve the control and adjustment of the above parameters.

[0048] The present invention can also employ other suitable automatic loading component 7 structures or devices as needed, such as directly using linear drive devices such as hydraulic cylinders to connect to the horizontal loading rope 201 and the vertical loading rope 301 respectively to achieve the loading purpose.

[0049] like Figure 4 As shown, in this embodiment, loading protective covers 8 are provided on both sides of the fixed platform 5, and the loading protective covers 8 are located in the frame 1. The automatic loading components 7 are respectively located in the loading protective covers 8 on the corresponding sides. In this way, when the test sample 6 breaks, the sample fragments can be prevented from affecting the automatic loading components 7. Figure 3As shown, the loading protective cover 8 may have a slot on one side for the horizontal loading rope 201 to pass through, and a slot on the other side for the vertical loading rope 301 to pass through. A protective cover steering wheel may be installed in the slot as needed to allow the horizontal loading rope 201 and the vertical loading rope 301 to turn and enter the corresponding side of the loading protective cover 8, thus not affecting the load loading operation. The axles on both sides of the steering wheel are supported by bearing seats on the inner wall of the loading protective cover 8. An observation slot is provided on the upper side of the loading protective cover 8 for the stress sensor 703, allowing operators to easily monitor the force sensor readings. Furthermore, the entire frame 1 of this invention can be housed within a transparent protective cover, ensuring the safety of personnel and on-site equipment while not affecting experimental observation. The control system 707 is located outside the transparent protective cover, not affecting the operator's control. A sealed door that can be opened can be provided on the transparent protective cover for easy installation and adjustment by the operator.

[0050] Furthermore, the present invention allows for the attachment of displacement sensors at appropriate locations on the test sample 6 as needed. This enables real-time acquisition of the axial deformation displacement of the test sample 6 during testing. Alternatively, devices such as lasers can be installed on the frame 1 to detect parameters such as the overall deformation and offset (deflection) of the test sample 6 in real time. The displacement sensors and lasers are all well-known technologies in the art and are commercially available products, connected to the control system 707. Additionally, the horizontal loading rope 201, vertical loading rope 301, and auxiliary loading rope 901 can be made of suitable materials, such as steel wire ropes, as needed.

[0051] The working principle of this invention is as follows:

[0052] The present invention includes the following steps in operation:

[0053] Step 1: Determine the loading method based on the condition of primary terminal 601 of test sample 6.

[0054] Among them, such as Figure 2 As shown, the primary terminal 601 can be vertically mounted on the upper end of the test sample 6. In this case, the primary terminal 601 usually only needs to apply test loads in the horizontal and vertical directions.

[0055] And such Figure 7 As shown, the primary terminal 601 can also be horizontally positioned on one side of the upper end of the test sample 6. In this case, in addition to applying the test loads in the horizontal and vertical directions, the primary terminal 601 generally also needs to be positioned as follows: Figure 8 The auxiliary test load is applied along the length direction as shown.

[0056] Step 2: After determining the loading method of terminal 601, connect the loading components.

[0057] Among them, such as Figure 2 As shown, when the primary terminal 601 is vertically positioned on the upper end of the test sample 6, the vertical loading rope 301 first passes through the connecting frame 4 and then is bound to the corresponding terminal hole on the primary terminal 601. Then, the primary terminal 601 is inserted into the connecting frame 4 through the lower opening of the horizontal loading shaft 402. Then, the connecting bolt is inserted into the corresponding shaft hole on the side wall of the horizontal loading shaft 402 from the outside and then threadedly connected to the corresponding terminal hole on the primary terminal 601, thereby realizing the connection between the connecting frame 4 and the primary terminal 601. During the horizontal loading test, the horizontal loading rope 201 transmits torque through the horizontal loading shaft 402 to achieve horizontal loading on the primary terminal 601.

[0058] And such Figure 7 As shown, when the primary terminal 601 is horizontally positioned on one side of the upper end of the test sample 6, the vertical loading rope 301 first passes through the lower opening of the connecting frame 4 and then binds to the corresponding terminal hole on the primary terminal 601. Then, the primary terminal 601 is attached to the lower side of the horizontal loading shaft 402, and the connecting bolt passes through the shaft hole on the lower side of the horizontal loading shaft 402 and is then threaded to the corresponding terminal hole on the primary terminal 601, thereby realizing the connection between the connecting frame 4 and the primary terminal 601.

[0059] After completing the connection between the connector 4 and the primary terminal 601, as follows Figure 4 As shown, the position of the lower base of the test sample 6 is adjusted and limited by the clamp 502 on the fixed platform 5, wherein, as... Figure 7 As shown, when the primary terminal 601 is horizontally positioned on one side of the upper end of the test sample 6, the clamping block 502 on one side of the clamping block groove 501 can be relatively outward, and the clamping block 502 on the other side can be relatively inward, thereby achieving eccentric locking of the lower end base of the test sample 6, and thus ensuring that the horizontal loading rope 201 and the vertical loading rope 301 can be aligned with the connecting frame 4 and the corresponding guide wheel.

[0060] Other examples Figure 6 As shown, the height of the first side support beam 101 and the second side support beam 105 on the frame 1 can be adjusted according to the condition of the primary terminal 601, thereby adjusting the height of the horizontal guide wheel 202 and the auxiliary guide wheel 903. This can further ensure that each loading rope can be accurately connected to the connecting frame 4 or the primary terminal 601, and can also meet the loading test requirements of the primary terminal 601 at different heights.

[0061] Then as Figure 1As shown, one end of the horizontal loading rope 201 is fixed to the bottom beam 104 on the corresponding side of the bottom end of the frame 1, and the other end passes through the horizontal guide wheel 202 and the connecting frame guide wheel 401 on the corresponding side in sequence before being connected to the horizontal loading assembly. The free end of the vertical loading rope 301 away from the primary terminal 601 passes through the second vertical guide wheel 303 and the first vertical guide wheel 302 on the corresponding side in sequence before being connected to the vertical loading assembly. And as... Figures 7-8 As shown, when the auxiliary loading mechanism 9 needs to be set, one end of the auxiliary loading rope 901 is tied to the corresponding terminal hole on the primary terminal 601, and the other end is passed around the auxiliary guide wheel 903 and connected to the auxiliary loading component 902.

[0062] Step 3: After the above installation is completed, the horizontal loading component, vertical loading component and auxiliary loading component 902 will begin loading for testing.

[0063] Among them, such as Figure 1 and Figure 3 As shown, the present invention can be manually loaded as needed. In this case, the horizontal loading component is the horizontal loading weight component 203, the vertical loading component is the vertical loading weight component 304, and the auxiliary loading component 902 is the auxiliary loading weight component. The horizontal loading weight component 203, the vertical loading weight component 304, and the auxiliary loading weight component have the same structure, all including a weight tray and open weights. By placing open weights of different weight combinations on the weight tray, the loading load adjustment needs of the horizontal loading rope 201 and the vertical loading rope 301 can be met.

[0064] And such Figures 4-5 As shown, the present invention can also adopt an automatic loading method as needed. In this case, the operator needs to connect the horizontal loading rope 201 and the vertical loading rope 301 to the corresponding force sensor 703 on the automatic loading component 7.

[0065] The present invention can, as needed, set up a set of automatic loading components 7 on each side of the fixed platform 5, so that horizontal loading and vertical loading can be simulated separately. During the test, the horizontal loading rope 201 is first connected to the automatic loading component 7, and then the loading slide 708 in the automatic loading component 7 is driven to move by the motor 701 to achieve the purpose of horizontal loading. Then, the horizontal loading rope 201 is separated from the automatic loading component 7, and the vertical loading rope 301 is connected to the corresponding force sensor 703 on the automatic loading component 7. Then, the loading slide 708 is driven to move in the opposite direction by the motor 701 to achieve the purpose of vertical loading.

[0066] The present invention may also provide two sets of automatic loading components 7 on each side of the fixed platform 5 as needed. The horizontal loading rope 201 and the vertical loading rope 301 are respectively connected to the corresponding set of automatic loading components 7, so that the horizontal and vertical loading purposes can be achieved simultaneously. The loading slide 708 can be provided with loading platform guide wheels to meet the turning requirements of the horizontal loading rope 201 and the vertical loading rope 301 after they are introduced, thereby ensuring that the loading positions of the horizontal loading rope 201 and the vertical loading rope 301 on the connecting frame 4 and the primary terminal 601 remain unchanged.

[0067] Step 4: After the set load is applied, maintain it for the set time, then observe and record the data changes from the displacement sensor, laser, and other devices. Simultaneously, visually observe the surface changes of the test sample 6. In this embodiment, if the automatic loading component 7 is used, the test load should rise steadily to the standard-specified static load value within 30 to 90 seconds, and be maintained at this load value for at least 60 seconds. Then, the displacement sensor attached to the test sample 6 is used to understand the deformation along the sample's length, and the laser is used to understand the overall deformation and offset (deflection) of the test sample 6. At the same time, visually observe whether there are obvious signs of damage on the surface of the test sample 6 (such as obvious deformation, cracking, leakage, etc.).

Claims

1. A mechanical strength testing system for high-voltage electrical equipment, characterized in that: The test sample (6) is fixed at the bottom of the frame (1) and the connecting frame (4). The frame (1) is fixed at the bottom of the bottom of the test sample (6) and the connecting frame (4) is fixed on the primary terminal (601) at the top of the test sample (6). The frame (1) is provided with a horizontal loading mechanism (2) and a vertical loading mechanism (3) on both sides. The horizontal loading mechanism (2) includes a horizontal loading rope (201) and the vertical loading mechanism (3) includes a vertical loading rope (301). The connecting frame (4) includes a horizontal loading shaft (402) and a vertical guide shaft (403). The horizontal loading shaft (402) is provided with connecting frame guide wheels (401) at both ends. 1) Horizontal guide wheels (202) are provided on both sides of the middle section. The frame (1) is provided with first vertical guide wheels (302) on both sides of the top and second vertical guide wheels (303) in the middle. One end of the horizontal loading rope (201) is fixed to the bottom end of the frame (1), and the other end passes through the corresponding horizontal guide wheel (202) and connecting frame guide wheel (401) in sequence and is connected to the corresponding horizontal loading component. One end of the vertical loading rope (301) passes through the vertical guide shaft (403) and is fixed to the primary terminal (601). The other end passes through the corresponding second vertical guide wheel (303) and first vertical guide wheel (302) in sequence and is connected to the corresponding vertical loading component.

2. The mechanical strength testing system for high-voltage electrical equipment according to claim 1, characterized in that: The frame (1) is provided with a first side support beam (101) in the middle that can adjust the height, and the horizontal guide wheel (202) is installed on the first side support beam (101) on the corresponding side; the top of the frame (1) is provided with top support beams (102) on both sides, and the two top support beams (102) are connected by a connecting beam (103); the first vertical guide wheel (302) is provided on the top support beam (102) on the corresponding side, and the second vertical guide wheel (303) is provided in the middle of the connecting beam (103); the bottom beams (104) on both sides of the bottom end of the frame (1) are provided with fixing rings (1041), and one end of the horizontal loading rope (201) is fixed to the fixing ring (1041).

3. The mechanical strength testing system for high-voltage electrical equipment according to claim 1, characterized in that: The horizontal loading shaft (402) has an opening on its lower surface. In addition, the side wall and lower surface of the horizontal loading shaft (402) are provided with shaft holes. The connecting bolt passes through the corresponding shaft hole and is threaded to the corresponding terminal hole on the primary terminal (601). The vertical loading rope (301) passes through the vertical guide shaft (403) and is connected to the corresponding terminal hole on the primary terminal (601).

4. The mechanical strength testing system for high-voltage electrical equipment according to claim 1, characterized in that: The fixed platform (5) is provided with a clamping block groove (501) and a clamping block (502). The clamping block groove (501) includes multiple groove tracks arranged in a cross shape, and each clamping block (502) is movable and adjustable in the corresponding groove track. The lower end of the test sample (6) is clamped and limited by each clamping block (502).

5. The mechanical strength testing system for high-voltage electrical equipment according to claim 4, characterized in that: The chute track adopts an inverted T-shaped cross-section structure, and chute protrusions (5011) are formed on both sides of the chute track. The clamping block (502) includes an upper clamping block (5021) and a lower clamping block (5022). The upper clamping block (5021) is located on the upper surface of the fixed platform (5), and the lower clamping block (5022) is located in the chute track and below the chute protrusions (5011). The locking bolt (503) is threaded into the upper clamping block (5021), and the lower end of the locking bolt (503) is fixedly connected to the lower clamping block (5022).

6. The mechanical strength testing system for high-voltage electrical equipment according to claim 1, characterized in that: The frame (1) is provided with an auxiliary loading mechanism (9) in the middle, the auxiliary loading mechanism (9) includes an auxiliary loading rope (901) and an auxiliary guide wheel (903); the frame (1) is provided with a second side support beam (105) that can adjust the height in the middle, and the auxiliary guide wheel (903) is provided on the second side support beam (105); one end of the auxiliary loading rope (901) is connected to the primary terminal (601), and the other end passes around the auxiliary guide wheel (903) and is connected to the auxiliary loading assembly (902).

7. The mechanical strength testing system for high-voltage electrical equipment according to claim 1, characterized in that: When the horizontal loading component and the vertical loading component are loaded manually, the horizontal loading component is a horizontal loading weight component (203) and the vertical loading component is a vertical loading weight component (304). The horizontal loading weight component (203) and the vertical loading weight component (304) have the same structure, both including a weight tray and open weights. The weight tray has a weight shaft in the middle. Each open weight is stacked on the weight tray in sequence, and the weight shaft passes through the bottom of the opening of each open weight in sequence. The bottom of the opening is located at the center of the open weight.

8. The mechanical strength testing system for high-voltage electrical equipment according to claim 1, characterized in that: Automatic loading components (7) are provided on both sides of the fixed platform (5), and the automatic loading components (7) are all located in the frame (1); the automatic loading components (7) include a loading base, a motor (701), a lead screw (702), a lead screw nut (704), a loading slide (708), and a force sensor (703). The motor (701) and the lead screw (702) are both located on the loading base, and the lead screw (702) is driven to rotate by the motor (701). The loading slide (708) is slidably connected to the loading base. The lead screw nut (704) is fitted on the lead screw (702) and connected to the lower surface of the loading slide (708). The force sensor (703) is located on the loading slide (708). The horizontal loading rope (201) and the vertical loading rope (301) are connected to the corresponding force sensor (703) on the loading slide (708).

9. The mechanical strength testing system for high-voltage electrical equipment according to claim 8, characterized in that: The fixed platform (5) is provided with loading protective covers (8) on both sides, and the automatic loading components (7) are respectively located in the loading protective covers (8) on the corresponding sides.

10. The mechanical strength testing system for high-voltage electrical equipment according to claim 1, characterized in that: The test sample (6) is equipped with a displacement sensor, and the frame (1) is equipped with a laser instrument; the frame (1) is entirely housed in a transparent protective cover, and the transparent protective cover is equipped with a sealed door that can be opened.

Images