An adaptive insulation blanket withstand test device

Abstract

The utility model discloses a kind of self-adaptive type insulation blanket withstand voltage test device, it is related to electric power safety tool detection technical field.The device includes workbench, lower electrode plate, upper electrode plate, gantry support, drive mechanism, grid pressure overlay, pressure sensor and control system.Drive mechanism is installed on gantry support, for driving grid pressure overlay vertical lift to compress upper electrode plate.Pressure sensor is arranged between drive mechanism and grid pressure overlay, for detecting applied pressure.Control system receives the feedback signal of pressure sensor and controls the action of drive mechanism, constitutes closed loop control loop, can compress force dynamic maintain at preset value.The utility model can automatically adapt the thickness variation of insulation blanket, ensure that compress force is constant, uniform, effectively avoid the test error and test piece damage caused by poor contact or overvoltage, improve the accuracy, safety and reliability of withstand voltage test.

Description

Technical Field

[0001] This utility model relates to the field of testing and inspection technology for safety tools and equipment in power operations, specifically an adaptive insulating blanket withstand voltage test device. Background Technology

[0002] Insulating blankets, as an important personal protective equipment, are widely used in the power and electrical industries to isolate live equipment and ensure the safety of workers. The reliability of their insulation performance is directly related to the life safety of operators; therefore, regularly conducting withstand voltage tests on insulating blankets is a necessary means to ensure their performance is up to standard and to eliminate potential safety hazards.

[0003] Commonly used insulating blanket withstand voltage testing equipment typically includes a workbench, a lower electrode plate fixedly mounted on the workbench, and an upper electrode plate manually placed on the surface of the insulating blanket to be tested by the operator. During testing, the insulating blanket is laid flat on the lower electrode plate, the upper electrode plate is manually placed, and then a high voltage is applied to perform the withstand voltage test.

[0004] However, existing experimental devices have the following obvious drawbacks in practical use: 1. Reliance on manual experience: In the existing technology, after the upper electrode plate is laid flat on the product, air gaps are easily generated, which can cause partial discharge or creepage, affecting the accuracy of the test and even causing qualified products to be misjudged. 2. Poor adaptability: Some devices use simple mechanical loading or add heavy objects to press the material. The thickness of the insulating blanket varies due to differences in material, usage and aging. Traditional devices lack the ability to automatically adapt to changes in the thickness of the insulating blanket. It is difficult to maintain a constant and appropriate clamping force for insulating blankets of different batches or different wear conditions, resulting in inconsistent test conditions and affecting the comparability and reliability of the results.

[0005] Therefore, we propose an adaptive insulation blanket withstand voltage test device. Utility Model Content

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an adaptive insulation blanket withstand voltage test device. Through a closed-loop pressure control system and a grid pressing structure, it achieves precise adaptive control of the clamping force during the insulation blanket withstand voltage test, effectively avoiding test errors and insulation blanket damage caused by poor contact or overpressure. This significantly improves the safety, accuracy, and reliability of the test, and can effectively solve the problems in the background technology.

[0007] (II) Technical Solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: an adaptive insulating blanket withstand voltage testing device, comprising a workbench, a lower electrode plate fixed on the workbench, and further comprising: an upper electrode plate for manually laying on the insulating blanket to be tested; a gantry support fixed on the upper part of the workbench, with guide rings fixedly installed on the left and right sides of the middle of the upper outer surface of the gantry support, the guide rings extending to the lower outer surface of the gantry support; a drive mechanism fixedly installed on the gantry support, the drive mechanism comprising a hydraulic rod, a connecting block, a fixed plate, a cantilever support, and a guide rod; a grid pressing plate, the drive mechanism being connected to the grid pressing plate for driving its vertical lifting and lowering, so that the lower pressing surface of the grid pressing plate can press against the upper electrode plate; a pressure sensor disposed on the force transmission path between the drive mechanism and the grid pressing plate for detecting the pressure applied to the upper electrode plate; and a control system electrically connected to the pressure sensor and the drive mechanism, configured to receive the feedback signal from the pressure sensor and control the action of the drive mechanism to maintain the pressure at a preset value.

[0008] Preferably, the grid covering plate has a grid-shaped frame structure with a grid area larger than that of the upper electrode plate to ensure that it can completely cover and press the upper electrode plate during covering.

[0009] Preferably, the cylinder of the hydraulic rod is fixed to the middle of the upper outer surface of the gantry bracket, the fixing plate is fixed to the middle of the upper outer surface of the mesh covering plate, and the pressure sensor is fixed between the middle of the upper outer surface of the fixing plate and the middle of the lower outer surface of the connecting block.

[0010] Preferably, there are two sets of cantilever brackets and guide rods. The two sets of cantilever brackets are fixed on the outer surfaces of both sides of the connecting block, and the guide rods are fixed on the outer surface of the upper end of the cantilever brackets. The lower outer surface of the output end of the hydraulic rod is fixedly connected to the middle of the upper outer surface of the connecting block, and the outer wall of the guide rod is slidably connected to the inner wall of the guide ring.

[0011] Preferably, the guide ring and guide rod are made of epoxy resin or polytetrafluoroethylene.

[0012] Preferably, the mesh cover plate is made of metal material and is reliably grounded, and a grounding terminal is installed at one end of the upper outer surface of the mesh cover plate.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides an adaptive insulating blanket withstand voltage test device, which has the following beneficial effects: 1. This adaptive insulating blanket withstand voltage test device, through a closed-loop feedback control circuit consisting of a pressure sensor and a control system, can monitor the pressure applied to the upper electrode plate in real time and accurately, and dynamically adjust the output of the drive mechanism. Regardless of the thickness of the insulating blanket under test, the system can automatically maintain the clamping force within the preset optimal range, effectively avoiding poor contact between the electrode and the test sample, partial discharge, or test errors caused by insufficient pressure, while also preventing structural damage to the insulating blanket caused by excessive pressure, thus improving the accuracy, repeatability, and reliability of the withstand voltage test.

[0014] 2. This adaptive insulating blanket withstand voltage test device adopts a grid covering plate with a grid structure of a cross shape. The grid area is larger than that of the upper electrode plate, which ensures that the upper electrode plate can be completely covered and uniformly pressed during the covering process. This not only ensures the uniform distribution of pressure but also facilitates the uniform diffusion of the electric field, reducing the risk of edge discharge. At the same time, the grid covering plate is made of metal material and is reliably grounded, which further shields interference and protects the safety of operators and test equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the adaptive insulating blanket withstand voltage test device of this utility model.

[0016] Figure 2 This is a schematic diagram of the drive mechanism in an adaptive insulating blanket withstand voltage test device of this utility model.

[0017] Figure 3 This is a schematic diagram of the grid-covered plate in the adaptive insulating blanket withstand voltage test device of this utility model.

[0018] Figure 4 This is a schematic diagram of the gantry support in the adaptive insulating blanket withstand voltage test device of this utility model.

[0019] In the diagram: 1. Workbench; 2. Lower electrode plate; 3. Upper electrode plate; 4. Mesh pressing plate; 5. Gantry support; 6. Guide ring; 7. Drive mechanism; 8. Hydraulic rod; 9. Connecting block; 10. Fixed plate; 11. Pressure sensor; 12. Cantilever support; 13. Guide rod; 14. Grounding terminal. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] like Figure 1-4 As shown, this utility model provides a technical solution: an adaptive insulating blanket withstand voltage test device.

[0022] The device includes a horizontally placed workbench 1, the surface of which is made of a high-strength insulating material (such as epoxy resin board) to ensure electrical safety during testing. A lower electrode plate 2 is fixedly mounted on the upper surface of the workbench 1. The lower electrode plate 2 is a flat metal conductive plate used to support the insulating blanket to be tested and is connected to one pole of a high-voltage power supply.

[0023] The upper electrode plate 3 is also a metal conductive plate. During testing, the operator manually lays it on the insulating blanket to be tested, which is placed flat on the lower electrode plate 2, and connects it to the other pole of the high-voltage power supply.

[0024] A sturdy gantry support 5 is fixedly installed on the upper part of the workbench 1. On the left and right sides of the middle of the upper outer surface of the crossbeam of the gantry support 5, a guide ring 6 is fixedly installed. The guide ring 6 is a cylindrical structure with a smooth inner wall and vertically penetrates the crossbeam of the gantry support 5 to its lower outer surface.

[0025] The drive mechanism 7 is fixedly mounted on the crossbeam of the gantry support 5. The drive mechanism 7 mainly includes a hydraulic rod 8, a connecting block 9, a fixed plate 10, a cantilever bracket 12, and guide rods 13. The cylinder of the hydraulic rod 8 is fixed to the middle of the upper outer surface of the crossbeam of the gantry support 5. The output end (i.e., the piston rod) of the hydraulic rod 8 extends downwards, and its lower end is fixedly connected to the middle of the upper surface of a connecting block 9. A horizontally extending cantilever bracket 12 is fixedly connected to each of the two outer surfaces of the connecting block 9. A guide rod 13 is vertically fixedly mounted on the upper outer surface of each cantilever bracket 12. The two guide rods 13 respectively cooperate with the two guide rings 6 mentioned above. The outer wall of the guide rod 13 and the smooth inner wall of the guide ring 6 are slidably connected, forming a precise sliding guide pair, ensuring the verticality and stability of the drive mechanism 7 during downward and upward movements, and preventing skewing. The guide ring 6 and the guide rod 13 are preferably made of engineering plastics (such as epoxy resin or polytetrafluoroethylene) with self-lubricating properties to reduce frictional resistance, ensure smooth movement, and have insulation properties.

[0026] A grid-shaped pressure plate 4 is positioned above the upper electrode plate 3. The grid pressure plate 4 is made of a metal material (such as aluminum alloy), and its grid area is designed to be larger than the area of ​​the upper electrode plate 3 to ensure that it completely covers and evenly presses the entire upper electrode plate 3 when pressed down, avoiding uneven local pressure. A fixing plate 10 is fixedly installed in the middle of the upper outer surface of the grid pressure plate 4. A pressure sensor 11 is installed between the middle of the upper outer surface of the fixing plate 10 and the middle of the lower outer surface of the connecting block 9. Therefore, when the hydraulic rod 8 drives the connecting block 9 downward, the pressure is transmitted through the pressure sensor 11 and the fixing plate 10 to the grid pressure plate 4, and then acts on the upper electrode plate 3. The pressure sensor 11 is used to detect the applied pressure value in real time.

[0027] A grounding terminal 14 is also installed at one end of the upper outer surface of the mesh cover plate 4, and is reliably connected to the ground through a grounding wire. This effectively shields the interference electric field during high-voltage testing, protects personnel and equipment safety, and ensures the uniform distribution of the electric field.

[0028] A control system (not labeled in the diagram) Figure 1 Located on the left side of the workbench 1, the control system (a PLC or microcontroller controller) is electrically connected to the pressure sensor 11 and the hydraulic rod 8 in the drive mechanism 7. The control system is pre-input with the preset pressure value required for the test. Its working logic is as follows: it receives the pressure signal fed back in real time from the pressure sensor 11, compares it with the preset value, and issues a control command based on the deviation value to drive the hydraulic rod 8 to perform fine-tuning of extension and retraction, thus forming a closed-loop feedback control circuit. Ultimately, it dynamically and accurately maintains the actual pressure applied to the upper electrode plate 3 at the preset value.

[0029] The working principle and usage process of this utility model are as follows: In use, the insulating blanket to be tested is first laid flat on the lower electrode plate 2 of the workbench 1. Then, the operator manually places the upper electrode plate 3 on the predetermined position on the upper surface of the insulating blanket. The drive mechanism 7 is activated by the control system, and the output end of the hydraulic rod 8 moves downward, pushing the grid pressing plate 4 to descend smoothly through the connecting block 9, pressure sensor 11, and fixed plate 10. The grid pressing plate 4 contacts and presses against the upper electrode plate 3.

[0030] During the clamping process, pressure sensor 11 continuously monitors the pressure value and transmits the signal to the control system. Based on the comparison between the feedback signal and the preset value, the control system adjusts the output of hydraulic rod 8 in real time until the pressure reaches and stabilizes at the preset value. This adaptive process automatically compensates for changes caused by differences in insulation blanket thickness or surface unevenness, ensuring a constant clamping force for each test.

[0031] After the clamping force stabilizes, a specified high voltage can be applied between the lower electrode plate 2 and the upper electrode plate 3 using an external high-voltage testing device (not shown in the figure) to conduct a withstand voltage test on the insulation blanket. After the test is completed, the high voltage is released, and the control system controls the hydraulic rod 8 to rise, which in turn raises the grid covering plate 4, allowing the sample to be removed.

[0032] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An adaptive insulating blanket withstand voltage testing device, comprising a workbench (1) and a lower electrode plate (2) fixed on the workbench (1), characterized in that, Also includes: The upper electrode plate (3) is used to be manually laid on the insulating blanket to be tested; The gantry support (5) is fixed on the upper part of the workbench (1), and guide rings (6) are fixedly installed on the left and right sides of the middle part of the upper outer surface of the gantry support (5). The guide rings (6) extend through to the lower outer surface of the gantry support (5). The drive mechanism (7) is fixedly installed on the gantry bracket (5), and the drive mechanism (7) includes a hydraulic rod (8), a connecting block (9), a fixed plate (10), a cantilever bracket (12) and a guide rod (13). The mesh pressing plate (4) is connected to the driving mechanism (7) and is used to drive it to rise and fall vertically so that the lower pressing surface of the mesh pressing plate (4) can press the upper electrode plate (3). A pressure sensor (11) is disposed on the force transmission path between the drive mechanism (7) and the mesh pressing plate (4) to detect the pressure applied to the upper electrode plate (3); The control system, electrically connected to the pressure sensor (11) and the drive mechanism (7), is configured to receive feedback signals from the pressure sensor (11) and control the action of the drive mechanism (7) to maintain the pressure at a preset value.

2. The adaptive insulating blanket withstand voltage test device according to claim 1, characterized in that: The grid pressing plate (4) has a grid-shaped frame structure, and its grid area is larger than that of the upper electrode plate (3) to ensure that the upper electrode plate (3) can be completely covered and pressed during pressing.

3. The adaptive insulating blanket withstand voltage test device according to claim 1, characterized in that: The cylinder of the hydraulic rod (8) is fixed in the middle of the upper outer surface of the gantry bracket (5), the fixed plate (10) is fixed in the middle of the upper outer surface of the grid cover plate (4), and the pressure sensor (11) is fixed between the middle of the upper outer surface of the fixed plate (10) and the middle of the lower outer surface of the connecting block (9).

4. The adaptive insulating blanket withstand voltage test device according to claim 1, characterized in that: The number of cantilever brackets (12) and guide rods (13) are two sets. The two sets of cantilever brackets (12) are fixed on the outer surfaces of both sides of the connecting block (9). The guide rods (13) are fixed on the outer surface of the upper end of the cantilever brackets (12). The lower outer surface of the output end of the hydraulic rod (8) is fixedly connected to the middle part of the upper outer surface of the connecting block (9). The outer wall of the guide rod (13) and the inner wall of the guide ring (6) are slidably connected.

5. An adaptive insulating blanket withstand voltage testing device according to claim 1 or 4, characterized in that: The guide ring (6) and guide rod (13) are made of epoxy resin or polytetrafluoroethylene.

6. The adaptive insulating blanket withstand voltage test device according to claim 1, characterized in that: The mesh cover plate (4) is made of metal material and is reliably grounded. A grounding terminal (14) is installed at one end of the upper outer surface of the mesh cover plate (4).

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