CN220872608U - Self-adaptive magnetic fluid withstand voltage test electrode device - Google Patents

Abstract

The utility model provides a self-adaptive magnetic fluid withstand voltage test electrode device, which comprises: a high-voltage inner electrode assembly; the magnetic fluid release recovery assembly is arranged above the high-voltage inner electrode assembly; and the magnetic field generating assembly is arranged on one side of the high-voltage inner electrode assembly. According to the utility model, the magnetic fluid is released and recovered through the magnetic fluid release recovery component, and the magnetic field generation component generates a space magnetic field, so that the magnetic fluid released by the magnetic fluid release recovery component can be flatly paved on the outer wall of the shielding cover sample under the action of the magnetic field, the magnetic fluid can be used as a grounding external electrode to carry out a withstand voltage test on the shielding cover sample, and the magnetic fluid release recovery component is different from a traditional test electrode in that the magnetic fluid can be subjected to different forms of change under the action of the magnetic field, can be suitable for shielding cover samples with different shapes, sizes and purposes to carry out the withstand voltage test, and can also be recovered.

Description

Self-adaptive magnetic fluid withstand voltage test electrode device

Technical Field

The utility model relates to the technical field of test and detection of safety tools for electric power operation, in particular to a self-adaptive magnetic fluid withstand voltage test electrode device.

Background

The insulating tools are indispensable tools in the live working process, and the shielding cover is one of the most widely used and common tools in the working process, and mainly plays roles of insulating and electrically isolating the high-voltage end part. The shielding cover is divided into a wire shielding cover, a porcelain bottle shielding cover, a cross arm shielding cover, a transformer terminal shielding cover and the like according to different shielding objects, and has various different model specifications and sizes according to different shielding object shapes.

According to the requirements of the management regulations of the insulated tools, the shielding cover should perform preventive alternating current withstand voltage test once every half year so as to ensure the quality and the insulativity of the tools. The preventive test of the shielding cover can be carried out according to the standard DL/T976-2017 of the preventive test procedure of live working tools, devices and equipment or the standard DL/T1476-2015 of the preventive test procedure of electric safety tools, and the layout diagram of test electrodes and test specimens is shown in figure 1.

The test procedure was as follows: firstly, placing a shielding cover 3' on an inner electrode 2' in a specified voltage withstand test to ensure that the inner electrode 2' is completely wrapped by the shielding cover 3', pasting metal foil or spraying conductive paint on the outer surface of the shielding cover 3 as an outer electrode 4', and connecting the outer electrode 4' with a grounding end, namely an outer electrode grounding point 5 '; the metal rod 1 'is connected with the test transformer 6' to carry out boosting so as to complete a preventive alternating current withstand voltage test;

The currently adopted metal foil paper pasting mode and conductive paint spraying mode can meet the requirements of the standard on tests, but still have the following defects:

(1) When the metal cloth is used for covering to serve as an external electrode, the size and the size of the metal cloth are fixed, the requirements of various shielding cover external dimensions cannot be met, the external electrode is in virtual connection, and the surface of a sample is not completely covered, so that test failure and reworking are caused;

(2) When a metal foil paper is used as an external electrode, the adhesion of the electrode is often affected by the material problem of the surface of the silicon rubber insulating cover; meanwhile, for the shielding cover with more complicated appearance details, the workload of manually pasting metal foil paper to completely cover the outer surface of the shielding cover is large, and the test efficiency is influenced; and the space of the detail part of the insulating cover is small, and the operation difficulty of sticking metal foil paper is high.

(3) When the conductive paint is used as the external electrode in a spraying manner, although the defects of metal cloth and metal foil paper are overcome, the surface insulation performance of the insulating cover is changed after the conductive paint is sprayed, the insulating cover is difficult to remove, the insulating cover is easy to damage, the insulating cover can only be used as a test scheme of a disposable sample, and the insulating cover is not suitable for the insulating cover which needs to be recycled and is only subjected to preventive tests.

Disclosure of utility model

In view of the above, the utility model provides a self-adaptive magnetic fluid withstand voltage test electrode device, which aims to solve the problems of poor universality, difficult operation or irreversible damage to samples of the existing insulating cover electrode materials and devices.

The utility model provides a self-adaptive magnetic fluid withstand voltage test electrode device, which comprises: a high-voltage internal electrode assembly for supporting the shadow mask sample so as to be supported inside the shadow mask sample and serve as an internal electrode; the magnetic fluid release and recovery assembly is arranged above the high-voltage inner electrode assembly and is used for releasing and recovering magnetic fluid; the magnetic field generating assembly is arranged on one side of the high-voltage inner electrode assembly and is used for generating a space magnetic field, so that magnetic fluid can be flatly paved on the outer wall of the shielding cover sample under the action of the magnetic field, and the magnetic fluid can be used as a grounding outer electrode so as to carry out a withstand voltage test on the shielding cover sample.

Further, the self-adaptive magnetic fluid withstand voltage test electrode device is characterized in that the magnetic field generating component is arranged below the high-voltage inner electrode component in a mode that the position of the magnetic field generating component can be adjusted along the height direction, and is used for moving upwards into the shielding cover sample, and generating a space magnetic field so as to adjust the magnetic fluid released by the magnetic fluid release and recovery component to change the space distribution in the space magnetic field, so that the magnetic fluid can be paved on the outer wall of the shielding cover sample to be used as an external electrode, the withstand voltage test of the shielding cover sample is realized, or gathered to the magnetic fluid release and recovery component to be recovered through the magnetic fluid release and recovery component, and the magnetic field generating component can also be lowered to the lower part of the shielding cover sample.

Further, the self-adaptive magnetic fluid withstand voltage test electrode device, the magnetic fluid release recovery assembly comprises: the magnetic fluid container is used for containing magnetic fluid; the magnetic fluid sprayer is communicated with the magnetic fluid container through a magnetic fluid pipeline, a positive pressure pump and a negative pressure pump are arranged on the magnetic fluid pipeline, the positive pressure pump is used for pumping the magnetic fluid in the magnetic fluid container to the nozzle of the magnetic fluid sprayer so as to release the magnetic fluid, and the negative pressure pump is used for pumping the magnetic fluid at the nozzle of the magnetic fluid sprayer back to the magnetic fluid container so as to recover the magnetic fluid.

Further, the self-adaptive magnetic fluid withstand voltage test electrode device, the magnetic fluid release recovery assembly further comprises: the magnetic fluid spray head is arranged on the spray head cross beam, and the magnetic fluid pipeline part is embedded in the spray head cross beam.

Further, the self-adaptive magnetic fluid withstand voltage test electrode device, the magnetic field generating assembly is an electromagnetic array, and the self-adaptive magnetic fluid withstand voltage test electrode device comprises: a carrying plate; the electromagnets are arranged on the bearing plate in a lattice manner, and a changing space magnetic field is generated through the on-off state change of each electromagnet.

Furthermore, in the self-adaptive magnetic fluid withstand voltage test electrode device, the bearing plate is also provided with a fixing hole for fixing on the support piece.

Further, the self-adaptive magnetic fluid withstand voltage test electrode device, the high-voltage internal electrode assembly comprises: an inner electrode body; and the electrode metal rod penetrates through the inner electrode body, and two ends of the electrode metal rod are respectively extended to two sides of the inner electrode body.

Further, the self-adaptive magnetic fluid withstand voltage test electrode device further comprises: and the image collector is used for collecting images of the shielding cover sample supported by the outer side of the high-voltage inner electrode assembly so as to judge whether the shielding cover sample is installed in place and/or whether the magnetic fluid completely covers the outer wall of the shielding cover sample.

Further, in the self-adaptive magnetic fluid withstand voltage test electrode device, the image collector is connected with the controller, and is used for receiving the image collected by the image collector, and controlling the magnetic field generating assembly based on the image so as to control the distribution of the space magnetic field generated by the magnetic field generating assembly and further control the space distribution of the magnetic fluid.

Further, the self-adaptive magnetic fluid withstand voltage test electrode device, the support assembly comprises: a support base plate; the first support frame is arranged on the support bottom plate along a first preset direction and is used for supporting the image collector; the second support frame is arranged on the support bottom plate along a second preset direction, the first preset direction and the second preset direction form an included angle, and the second support frame is used for supporting the high-voltage inner electrode assembly so that the high-voltage inner electrode assembly is supported between the two image collectors; the third support frame is arranged on the support bottom plate, the magnetic field generating assembly is arranged on the third support frame in a mode of being capable of adjusting the position along the height direction, and the third support frame is used for movably supporting the magnetic field generating assembly.

According to the self-adaptive magnetic fluid withstand voltage test electrode device, the magnetic fluid release recovery assembly is used as an inner electrode; the magnetic fluid is released and recovered through the magnetic fluid release recovery component, and a space magnetic field is generated through the magnetic field generation component, so that the magnetic fluid released by the magnetic fluid release recovery component can be flatly paved and covered on the outer wall of the shielding cover sample under the action of the magnetic field, the magnetic fluid can be used as a grounding external electrode to carry out a withstand voltage test on the shielding cover sample, and the problem that the conventional insulating cover electrode material and device are poor in universality, difficult to operate or irreversibly damaged to the sample is solved. In addition, the magnetic fluid is used as an external electrode, which is different from the traditional electrode materials such as conductive cloth, conductive metal foil or conductive paint, and the like, and the conductive magnetic fluid is used as a novel electrode material in the embodiment, so that the change of different shapes can be effectively and conveniently realized, and the insulation voltage withstand test of most shielding cover samples is adapted.

Further, the device detects and identifies the sample and the surface thereof based on an image processing mode, compares and analyzes the electrode coverage condition, realizes automatic adjustment and change of the electrode by changing the mode of the magnetic field generation assembly, has no artificial participation in the whole process, realizes the automation and the intellectualization of electrode self-adaption, and improves the test efficiency.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

Fig. 1 is a schematic diagram of a wiring structure of a shield provided in the prior art for a preventive ac withstand voltage test;

FIG. 2 is a schematic structural diagram of an adaptive magnetic fluid withstand voltage test electrode device according to an embodiment of the present utility model;

FIG. 3 is a top view of an adaptive magnetic fluid withstand voltage test electrode device according to an embodiment of the present utility model;

Fig. 4 is a front view of the adaptive magnetic fluid withstand voltage test electrode device according to the embodiment of the present utility model when magnetic fluid tiling is performed;

FIG. 5 is a side view of an adaptive magnetic fluid withstand voltage test electrode device according to an embodiment of the present utility model when magnetic fluid tiling is performed;

FIG. 6 is a front view of an adaptive magnetic fluid withstand voltage test electrode device according to an embodiment of the present utility model when performing a withstand voltage test;

FIG. 7 is a side view of an adaptive magnetic fluid withstand voltage test electrode apparatus according to an embodiment of the present utility model;

FIG. 8 is a block diagram of an adaptive magnetic fluid withstand voltage test electrode device according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of a magnetic fluid release and recovery assembly according to an embodiment of the present utility model;

FIG. 10 is a schematic structural diagram of an electromagnetic array according to an embodiment of the present utility model;

FIG. 11 is a block diagram of a self-adaptive magnetic fluid withstand voltage test electrode device for withstand voltage test according to an embodiment of the present utility model.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 2 to 8, a preferred structure of the adaptive magnetic fluid withstand voltage test electrode device according to the embodiment of the present utility model is shown. As shown, the apparatus includes: the magnetic field generator comprises a support assembly 1, a high-voltage inner electrode assembly 2, a magnetic fluid release and recovery assembly 3 and a magnetic field generation assembly 4; wherein,

The high-voltage internal electrode assembly 2 is used to support the shadow mask sample 5 so as to be supported inside the shadow mask sample 5 and serve as an internal electrode. Specifically, the high-voltage inner electrode assembly 2 may be disposed on the support assembly 1, and supported at a position corresponding to the detection position by the support assembly 1, so that the high-voltage inner electrode assembly 2 may internally support the shielding cover sample 5, that is, may be supported inside the shielding cover sample 5, not only may be used as an inner electrode, may be connected to a high-voltage terminal, and may be used as a high-voltage electrode, so as to implement a withstand voltage test of the shielding cover sample 5, but also may implement support of the shielding cover sample 5, so that the shielding cover sample 5 may be supported at the detection position; of course, in other embodiments, the shielding cover sample 5 may be supported by other supporting members, so that the shielding cover sample 5 is supported at the detection position. In this embodiment, the shielding cover sample 5 has a U-shaped structure, which is inverted, i.e., has an opening facing downward, and can be supported on the high-voltage inner electrode assembly 2. Wherein, the support component 1 is mainly made of insulating materials such as epoxy resin, and the like, so that the discharge phenomenon of surrounding components can not be generated when the high-voltage inner electrode component 2 is loaded with high voltage. The main function of the support assembly 1 is to support the withstand voltage test electrode device while achieving the raising and lowering actions of the magnetic field generating assembly 4. The high-voltage inner electrode assembly 2 can be in an inner electrode pattern specified in the standard DL/T976-2017 or DL/T1476-2015 so as to meet the requirements of the standard on the inner electrode of the shield withstand voltage test.

The magnetic fluid release and recovery assembly 3 is arranged above the high-voltage inner electrode assembly 2 and is used for releasing and recovering magnetic fluid. Specifically, the magnetic fluid release and recovery assembly 3 can be supported above the high-voltage inner electrode assembly 2 by the support assembly 1, and can release and recover magnetic fluid. In this embodiment, the magnetic fluid may be a magnetically driven viscous liquid of a non-Newtonian fluid described in "Reconfigurable MAGNETIC SLIME Robot: deformation, adaptability, and Multifunction" entitled "Advanced Functional Materials", the first author of the article being doctor at the university of hong Kong, doctor post Sun Mengmeng, university of hong Kong, zhang Li, and university of Harbin industry Xie Hui as co-communicating authors of the paper, the magnetically driven viscous liquid of the non-Newtonian fluid being a non-Newtonian fluid hydrogel having viscoelasticity, and the article also proving that the magnetically driven viscous liquid of the non-Newtonian fluid has electrical conductivity and can be used as an electrode.

The magnetic field generating assembly 4 is arranged on one side of the high-voltage inner electrode assembly 2 and is used for generating a space magnetic field, so that magnetic fluid can be flatly paved on the outer wall of the shielding cover sample 5 under the action of the magnetic field, and the magnetic fluid can be used as a grounding outer electrode 6 to perform a withstand voltage test on the shielding cover sample 5. Specifically, the magnetic field generating component 4 may be disposed on the support component 1, so as to be supported on one side of the high-voltage inner electrode component 2 by the support component 1, so that a space magnetic field can be generated at the detection position, the position where the shielding cover sample 5 is located is provided with the space magnetic field, the space magnetic field can control the magnetic fluid released by the release recovery component 3, so that the magnetic fluid presents corresponding space distribution, in particular, the magnetic field generating component 4 can generate different space magnetic field distributions, and the different space magnetic field distributions can cause the magnetic fluid to present different space distributions, for example, the magnetic fluid is tiled and covered on the outer wall of the shielding cover sample 5, that is, the outer surface of the shielding cover sample 5 is completely covered with the magnetic fluid, that is, the top wall and the two side walls of the shielding cover sample 5 are completely covered with the magnetic fluid, so that the magnetic fluid can be used as the grounding outer electrode 6, the shielding cover sample 5 is tested, and the magnetic fluid can be gathered to the position of the magnetic fluid release recovery component 3, so as to recover the magnetic fluid through the pressure-resistant magnetic fluid release recovery component 3. That is, the magnetic field generating assembly 4 generates a controllable magnetic field that drives the movement of the magnetic fluid. The magnetic field generating component 4 and the magnetic fluid release recovery component 3 can be used as a magnetic fluid external electrode shape control module, and mainly control the magnetic fluid coverage area and shape so as to ensure the full coverage of the magnetic fluid on the outer surface of the shielding cover sample.

In this embodiment, the two magnetic field generating assemblies 4 may be disposed opposite to each other and symmetrically disposed on both sides of the high-voltage inner electrode assembly 2, that is, in a "back-to-back" state. The magnetic field generating component 4 may be an electromagnetic array, or may be other magnetic field generators, for example, chinese publication No.: the magnetic fluid generator disclosed in CN115113729a is not limited in this embodiment.

In this embodiment, in order to realize control of the spatial distribution of the magnetic fluid while avoiding interference with the pressure-resistant test, preferably, the magnetic field generating assembly 4 is disposed below the high-voltage inner electrode assembly 2 in a manner capable of performing position adjustment in the height direction, and is used for moving up into the shielding cover sample 5 and generating a spatial magnetic field, so as to adjust the magnetic fluid to perform spatial distribution change in the spatial magnetic field, and further enable the magnetic fluid to be tiled on the outer wall of the shielding cover sample 5 to serve as the grounded external electrode 6, so as to realize the pressure-resistant test of the shielding cover sample, or gather to the position of the magnetic fluid release recovery assembly 3, so as to perform recovery by the magnetic fluid release recovery assembly 3, and the magnetic field generating assembly 4 can also be lowered below the shielding cover sample 5, so as to avoid interference with the pressure-resistant test of the shielding cover sample 5, that is, if the magnetic field generating assembly 4 is not lowered, that is closer to the high-voltage end, i.e., the high-voltage inner electrode assembly 2, discharge along air may occur during the pressure-resistant test, resulting in failure of the pressure-resistant test. Specifically, the magnetic field generating assembly 4 is arranged on the support assembly 1 in a manner that the position of the magnetic field generating assembly can be adjusted along the height direction, so that the magnetic field generating assembly 4 can be lifted relative to the high-voltage inner electrode assembly 2 along the height direction, as shown in fig. 4 and 5, the magnetic field generating assembly 4 can be moved upwards into the shielding cover sample 5, namely, is positioned at one side of the high-voltage inner electrode assembly 2, so that a space magnetic field is generated at a detection position, namely, the shielding cover sample 5, and magnetic fluid can be subjected to space distribution change under the action of the space magnetic field, so that the magnetic fluid can be tiled and covered on the outer surface of the shielding cover sample 5, and can be gathered at the position of the magnetic fluid release and recovery assembly 3, and further, the magnetic fluid release and recovery assembly 3 can realize recovery; meanwhile, the magnetic field generating assembly 4 can also move downwards to the lower parts of the high-voltage inner electrode assembly 2 and the shielding cover sample 5, so that the shielding cover sample 5 and the high-voltage inner electrode assembly 2 are separated by a preset distance, and the discharge condition is avoided. The preset distance may be determined according to practical situations, and in this embodiment, the preset distance is not limited. In this embodiment, the complete coverage may be determined according to practical situations, for example, coverage up to 90% or more, or may be other coverage, which is not limited in this embodiment.

With continued reference to fig. 2 to 3, in order to obtain the spatial distribution of the magnetic fluid, preferably, both sides of the high-voltage inner electrode assembly 2 are provided with image collectors 7 for collecting images of the shielding cover sample 5 supported by the high-voltage inner electrode assembly 2, so as to determine whether the magnetic fluid completely covers the outer wall of the shielding cover sample 5. Specifically, the two image collectors 7 may be cameras, and are respectively disposed on two sides of the high-voltage inner electrode assembly 2, so as to perform image collection on the outer surface of the shielding cover sample 5 supported by the outer portion of the high-voltage inner electrode assembly 2, as shown in fig. 3, a line of a field of view of the image collector 7 is shown as a dotted line in fig. 3, and the line of the field of view of the image collector 7 is within the range of the dotted line, so that the outer surface of the shielding cover sample 5 can be subjected to full-range image collection, so as to determine whether the magnetic fluid completely covers the outer surface of the shielding cover sample 5. The two cameras can be symmetrically arranged, so that the field of view of the two cameras can be ensured to realize the full-area coverage of the outer surface of the shielding cover sample 5. The image collector 7 is mainly used for collecting the appearance of the sample, and observing the covering condition of the magnetohydrodynamic outer electrode on the outer surface of the sample so as to facilitate the adjustment of the device.

In this embodiment, as shown in fig. 8, the magnetic field generating assembly 4 is further connected to a controller 8 for controlling the magnetic field generating assembly 4 to adjust the spatial distribution of the spatial magnetic field generated by the magnetic field generating assembly 4, thereby adjusting the spatial distribution of the magnetic fluid. Specifically, the controller 8 is configured to control on-off of each electromagnet 31 in the electromagnetic array, so as to adjust a spatial magnetic field generated by the electromagnetic array. The controller 8 may be connected to the electromagnetic array, and send an electrical signal to the electromagnetic array to control the on-off of each electromagnet 31, so as to adjust the generated spatial magnetic field according to the on-off of different electromagnets 31, and further control the magnetic fluid to perform different spatial distributions. In this embodiment, the controller 8 is further connected to the magnetic fluid release and recovery assembly 3, and is used to control the magnetic fluid release and recovery assembly 3 to release or recover magnetic fluid, so as to realize control of whether the magnetic fluid is recovered or not. The controller 8 may also be connected to the image collector 7, and configured to receive an image collected by the image collector 7, and control each electromagnet 31 in the electromagnetic array based on the image, that is, control the magnetic field generating assembly 4 based on the image collected by the image collector 7, so as to control the on-off state of each electromagnet 31. In this embodiment, the controller 8 and the image collector 7 may be connected by a video data line to implement signal transmission.

With continued reference to fig. 2 and 3, the support assembly 1 comprises: a support base plate 11, a first support frame 12, a second support frame 13, and a third support frame 14; wherein, the first supporting frame 11 is arranged on the supporting base plate 11 along a first preset direction (horizontal direction shown in fig. 3) and is used for supporting the image collector 7; a second support frame 12 is disposed on the support base plate 11 along a second preset direction (a vertical direction as shown in fig. 3), and the first preset direction and the second preset direction form an included angle, and the second support frame 12 is used for supporting the high-voltage inner electrode assembly 2 so that the high-voltage inner electrode assembly 2 is supported between the two image collectors 7; a third supporting frame 14 is disposed on the supporting base plate 11, and the third supporting frame 14 is used for movably supporting the magnetic field generating assembly 4.

In particular, the dimensions of the support floor 11 should be large enough to ensure a smooth placement of the device on a horizontal table top. The first support frame 12 may include two parallel first support rods, where the straight line direction of the two first support rods is a first preset direction, and the two first support rods are all vertically arranged, and a plurality of positioning holes may be arranged on the first support rods, and the positioning holes are arranged from top to bottom, i.e. along the length direction of the first support rods at equal intervals, so as to facilitate the up-and-down adjustment of the installation position of the image collector 7, so as to obtain a better sample field of view; in other embodiments, the image collector 7 may be disposed on the first support frame 12 in a height-adjustable manner, for example, slidably disposed on the first support frame 12, so as to facilitate adjusting the height position of the image collector 7 to obtain a better view of the sample. The second supporting frame 13 may include two second supporting rods arranged in parallel, where the straight line direction where the two second supporting rods are located is a second preset direction, and the two second supporting rods are all vertically arranged; the top ends of the second support rods are respectively provided with an electrode rod supporting structure 131 for supporting and limiting the electrode rods 22 of the high-voltage inner electrode assembly 2, that is, two ends of the high-voltage inner electrode assembly 2 are respectively placed on the two second support rods; the electrode rod supporting structure 131 may be a crescent structure, and can stably bear the high-voltage inner electrode assembly 2 at the bottom of the crescent structure, and play roles of mechanical support and main electrical insulation. The number of the third supporting frames 14 can be two, so that the two magnetic field generating assemblies 4 can be respectively supported, and the height direction position adjustment of the magnetic field generating assemblies 4 can be realized, that is, the two magnetic field generating assemblies 4 are respectively arranged on the two third supporting frames 14.

With continued reference to fig. 4, the third support frame 14 includes: a fixed frame 141 and a movable frame 142; the movable frame 142 is slidably disposed on the fixed frame 141, and is used for driving the magnetic field generating assembly 4 to adjust the height position. Specifically, the fixed frame 141 is vertically disposed on the supporting base 11, the movable frame 142 may be vertically disposed, and the movable frame 142 and the fixed frame 141 may be slidably connected along a length direction (a vertical direction as shown in fig. 4) of the fixed frame 141, and the magnetic field generating assembly 4 may be fixedly mounted on a top end of the movable frame 142, and by sliding of the movable frame 142, a position adjustment of the magnetic field generating assembly 4 in a height direction may be achieved. In this embodiment, a groove is disposed on the fixed frame 141 along the length direction thereof, a protrusion adapted to the groove is disposed on the movable frame 142, and the protrusion is slidably disposed in the groove, and is matched with the groove, so as to realize sliding and guiding, realize relative movement between the fixed frame 141 and the movable frame 142, and further realize the change of the position of the magnetic field generating assembly 4.

With continued reference to fig. 2, the high-voltage inner electrode assembly 2 includes: an inner electrode body 21 and two electrode rods 22; the electrode metal rod 22 is disposed through the inner electrode body 21, and two ends of the electrode metal rod 22 are respectively extended to two sides of the inner electrode body 21. Specifically, the electrode rod 22 may be a metal rod, the shape and size and the installation mode of the inner electrode body 21 and the electrode rod 22 meet the relevant requirements of the standard DL/T976-2017 or DL/T1476-2015, and the manufacturing material may be aluminum alloy or iron alloy or other metal materials with good electric conductivity and light weight.

Referring to fig. 9, a schematic structural diagram of a magnetic fluid release and recovery assembly according to an embodiment of the present utility model is shown. As shown, the magnetic fluid release and recovery assembly 3 includes: a magnetic fluid container 31 and a magnetic fluid nozzle 32; wherein the magnetic fluid container 31 is used for containing magnetic fluid; the magnetic fluid spray head 32 is communicated with the magnetic fluid container 31 through a magnetic fluid pipeline 33, a positive pressure pump 34 and a negative pressure pump 35 are arranged on the magnetic fluid pipeline 33, the positive pressure pump 34 is used for pumping the magnetic fluid in the magnetic fluid container 31 to the nozzle of the magnetic fluid spray head 32 so as to release the magnetic fluid, and the negative pressure pump 35 is used for pumping the magnetic fluid at the nozzle of the magnetic fluid spray head 32 back to the magnetic fluid container 31 so as to recycle the magnetic fluid.

Specifically, the magnetic fluid release and recovery assembly 3 may further include a magnetic fluid spray head beam 36 for supporting. The magnetic fluid spray head 32 may be disposed on the magnetic fluid spray head cross member 36 such that the magnetic fluid spray head 32 is supported directly above the high-voltage inner electrode assembly 2, i.e., directly above the shield sample 5, through the magnetic fluid spray head cross member 36, so that the magnetic fluid spray head 32 may release or recover magnetic fluid from directly above the shield sample 5. The magnetic fluid nozzle beam 36 can be internally embedded with the magnetic fluid pipeline 33, one end of the magnetic fluid pipeline 33 extends out from the tail end of the magnetic fluid nozzle beam 36 and is connected with the magnetic fluid container 31, the other end of the magnetic fluid pipeline is connected with the magnetic fluid nozzle 32, and the magnetic fluid nozzle 32 can be arranged in the middle of the magnetic fluid nozzle beam 36, so that the release and recovery of magnetic fluid on the surface of the shielding cover sample 5 can be conveniently and effectively realized. The positive pressure pump 34 and the negative pressure pump 35 can be connected in series on the magnetic fluid pipeline 33 to realize positive pressure and negative pressure in the magnetic fluid pipeline 33 and provide power for releasing and recovering magnetic fluid in the magnetic fluid spray head 32. Of course, in other embodiments, the magnetic fluid pipe 33 embedded in the magnetic fluid nozzle beam 36 may also be wound around or fixed on the magnetic fluid nozzle beam 36, and the arrangement mode of the magnetic fluid pipe 33 in this embodiment is not limited, and mainly realizes the communication between the magnetic fluid container 31 and the magnetic fluid nozzle 32. Of course, there may be two magnetic fluid pipelines 33 between the magnetic fluid container 31 and the magnetic fluid nozzle 32, and the two magnetic fluid pipelines 33 are respectively provided with a positive pressure pump 34 and a negative pressure pump 35 to respectively release and recover magnetic fluid.

Referring to fig. 10, a schematic structural diagram of an electromagnetic array according to an embodiment of the present utility model is shown. As shown, the electromagnetic array includes: a carrier plate 41 and a plurality of electromagnets 42; wherein, the electromagnets 42 are arranged on the carrier 41 in a lattice arrangement, and a variable space magnetic field is generated by the on-off state change of each electromagnet 42. Specifically, the cross section of the bearing plate 41 may be an inverted L-shaped structure, and the horizontal plate and the vertical plate are formed by 90 ° splicing, and may be insulating plates. The horizontal plate and the vertical plate are respectively provided with electromagnets 42 which are arranged in a lattice arrangement, so that the space distribution of the magnetic field generated by the electromagnetic array is adjusted through the on-off control of each electromagnet 42. In the present embodiment, the carrier 41 is provided with a fixing hole 411 for fixing on the movable frame 142, so as to adjust the height position along with the movable frame 142. The size of the carrying plate 41 is slightly smaller than that of the shielding cover sample 5, so that the electromagnetic array can be smoothly placed into the shielding cover sample 5, and a plurality of electromagnets 42 are fixedly arranged on the carrying plate 41, and the number and arrangement modes of the electromagnets can be adjusted according to the different sizes of the samples.

With continued reference to fig. 8, the controller 8 includes: a main control board 81, a pump relay board 82, and an electromagnetic array relay board 83; the pump relay board 82 and the electromagnetic array relay board 83 are respectively connected with the main control board 81, and the pump relay board 82 is used for controlling the magnetic fluid release recovery assembly 3 so as to control the release and recovery of magnetic fluid; the electromagnetic array relay board 83 is used for controlling the magnetic field generating assembly 4 to control the distribution of the spatial magnetic field generated by the magnetic field generating assembly 4, and further control the spatial distribution of the magnetic fluid. The main control board 81 is also connected with the image collector 7, and is used for controlling the magnetic fluid release recovery assembly 3 and the magnetic field generation assembly 4 based on the image acquired by the image collector 7. In this embodiment, the main control board 81 is connected to the image collector 7 through a video data line, and the relay board 82 is connected to the main control board 81, and the relay board 82 and the electromagnetic array relay board 83 are connected to each other through a board signal line, so as to realize signal transmission. The main control board 81 is provided with an MCU (Micro Controller Unit, a multipoint control unit), the MCU811 can select an STM32 type minimum system unit, the electromagnetic array relay boards 83 can be in one-to-one correspondence with the magnetic field generating assemblies 4, that is, the electromagnetic array relay boards 83 can be two, each electromagnetic array relay board 83 is provided with electromagnetic relays 831 in one-to-one correspondence with electromagnets in the electromagnetic array, as shown in fig. 10, the number of electromagnets in the electromagnetic array is 15, in this embodiment, the number of electromagnetic relays 831 of each electromagnetic array relay board 83 is also 15, fig. 8, the number of relays 831 is 7, and in the practical construction, the electromagnetic relays 831 of each electromagnetic array relay board 83 are in one-to-one correspondence with the electromagnets in the electromagnetic array. The electromagnetic relay 831 can be a loose JS1-12V-F type electromagnetic relay for realizing the on-off of an electromagnet in an electromagnetic array. Two groups of pump relays 821 can be installed on the pump relay board 82, the type of the pump relays 821 is the same as that of the electromagnetic relays 831, and the pump relays 821 are respectively connected with the positive pressure pump 34 and the negative pressure pump 35 and are responsible for starting and stopping the positive pressure pump 34 and the negative pressure pump 35, so that release and recovery of magnetic fluid are realized. Wherein M1 and M2 are respectively a positive pressure pump 34 and a negative pressure pump 35.

The working principle and the method of the self-adaptive magnetic fluid withstand voltage test electrode device are as follows: as shown in fig. 11, when the shielding cover sample 5 is placed on the high-voltage inner electrode assembly 2 in a ready state, i.e. with the opening facing downwards, firstly, the left and right cameras, i.e. the two image collectors, of the high-voltage inner electrode assembly 2 respectively perform image acquisition to confirm that the image information of the sample surface on the outer surface of the shielding cover sample 5 can be accurately acquired, and when any one side camera cannot detect the sample, the sample enters the cycle detection, i.e. the position adjustment of the shielding cover sample 5 is performed and the image acquisition and detection are continuously performed until the left and right cameras can detect the shielding cover sample 5, as shown in fig. 4 and 5, at this time, the sample identification phase is ended and the magnetic fluid electrode control phase is entered. In the magnetic fluid control stage, the magnetic field generating component 4, namely the electromagnetic array, is firstly lifted to the highest position, namely the position in the groove of the shielding cover sample 5; the magnetic fluid is released through the magnetic fluid release recovery assembly 3, the magnetic fluid morphology is controlled through the electromagnetic arrays on the left side and the right side of the high-voltage inner electrode assembly 2, namely the magnetic field generation assembly 4, respectively, the left side camera and the right side camera are used for obtaining corresponding side sample surface images in a grouping mode, the relation between the sample surface magnetic fluid coverage area and the sample surface area is identified and compared, when the full coverage of the surface of the shielding cover sample 5 is not achieved, the state of the corresponding electromagnet 41 in the electromagnetic array is changed to adjust the magnetic fluid morphology until the full coverage of the magnetic fluid on the surface of the shielding cover sample 5 is achieved, the magnetic fluid control on the side is completed, after the magnetic fluid control on the left side and the right side is completed, a magnetic fluid electrode is formed, the magnetic fluid electrode control stage is ended, the magnetic fluid electrode can be grounded, and a withstand voltage test is performed. After the pressure-resistant test is finished, the electromagnetic array is extended to the highest position, the state of the electromagnet 31 in the electromagnetic array is changed through the on-off of the electromagnetic relay 831, the magnetic fluid electrode is gathered towards the magnetic fluid spray head 32, the negative pressure pump 35 is started, the gathered magnetic fluid is recovered through the magnetic fluid spray head 32 until most of the magnetic fluid electrode returns into the magnetic fluid spray head 32, and the magnetic fluid electrode recovery control stage is finished; finally, the mask sample 5 on the high-voltage inner electrode assembly 2 can be taken out, and the test is ended.

In summary, the self-adaptive magnetic fluid withstand voltage test electrode device provided by the embodiment uses the magnetic fluid release recovery assembly 2 as an inner electrode; the magnetic fluid is released and recovered through the magnetic fluid release and recovery assembly 3, and a space magnetic field is generated through the magnetic field generation assembly 4, so that the magnetic fluid released by the magnetic fluid release and recovery assembly 3 can be flatly paved and covered on the outer wall of the shielding cover sample 5 under the action of the magnetic field, the magnetic fluid can be used as a grounding external electrode 6 to carry out a withstand voltage test on the shielding cover sample 5, and the problem that the universality of the traditional insulating cover electrode material and the device is poor, the operation is difficult or the sample is irreversibly damaged is solved. In addition, the magnetic fluid is used as an external electrode, which is different from the traditional electrode materials such as conductive cloth, conductive metal foil or conductive paint, and the like, and the conductive magnetic fluid is used as a novel electrode material in the embodiment, so that the change of different shapes can be effectively and conveniently realized, and the insulation voltage withstand test of most shielding cover samples is adapted.

Further, the device detects and identifies the sample and the surface thereof based on an image processing mode, compares and analyzes the electrode coverage condition, realizes automatic adjustment and change of the electrode by changing the magnetic field of the magnetic field generating assembly 4, has no artificial participation in the whole process, realizes the automation and the intellectualization of electrode self-adaption, and improves the test efficiency.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. An adaptive magnetic fluid withstand voltage test electrode device, comprising:

a high-voltage internal electrode assembly for supporting the shadow mask sample so as to be supported inside the shadow mask sample and serve as an internal electrode;

The magnetic fluid release and recovery assembly is arranged above the high-voltage inner electrode assembly and is used for releasing and recovering magnetic fluid;

The magnetic field generating assembly is arranged on one side of the high-voltage inner electrode assembly and is used for generating a space magnetic field, so that magnetic fluid can be flatly paved on the outer wall of the shielding cover sample under the action of the magnetic field, and the magnetic fluid can be used as a grounding outer electrode so as to carry out a withstand voltage test on the shielding cover sample.

2. The adaptive magnetohydrodynamic pressure test electrode device according to claim 1, wherein,

The magnetic field generating assembly is arranged below the high-voltage inner electrode assembly in a position-adjusting mode along the height direction, is used for moving upwards into the shielding cover sample and generating a space magnetic field so as to adjust the magnetic fluid released by the magnetic fluid release and recovery assembly to change the space distribution in the space magnetic field, so that the magnetic fluid can be paved on the outer wall of the shielding cover sample to serve as an outer electrode, the pressure-proof test of the shielding cover sample is realized, or gathered to the magnetic fluid release and recovery assembly to be recovered through the magnetic fluid release and recovery assembly, and the magnetic field generating assembly can also be lowered to the lower part of the shielding cover sample.

3. An adaptive magnetic fluid pressure resistant test electrode device according to claim 1 or 2, wherein the magnetic fluid release recovery assembly comprises:

the magnetic fluid container is used for containing magnetic fluid;

The magnetic fluid sprayer is communicated with the magnetic fluid container through a magnetic fluid pipeline, a positive pressure pump and a negative pressure pump are arranged on the magnetic fluid pipeline, the positive pressure pump is used for pumping the magnetic fluid in the magnetic fluid container to the nozzle of the magnetic fluid sprayer so as to release the magnetic fluid, and the negative pressure pump is used for pumping the magnetic fluid at the nozzle of the magnetic fluid sprayer back to the magnetic fluid container so as to recover the magnetic fluid.

4. The adaptive magnetic fluid pressure resistant test electrode device of claim 3, wherein the magnetic fluid release recovery assembly further comprises:

the magnetic fluid spray head is arranged on the spray head cross beam, and the magnetic fluid pipeline part is embedded in the spray head cross beam.

5. The adaptive magnetic fluid pressure resistant test electrode device of claim 1 or 2, wherein the magnetic field generating assembly is an electromagnetic array comprising:

A carrying plate;

the electromagnets are arranged on the bearing plate in a lattice manner, and a changing space magnetic field is generated through the on-off state change of each electromagnet.

6. The adaptive magnetohydrodynamic pressure test electrode device according to claim 5, wherein,

The bearing plate is also provided with a fixing hole for fixing on the supporting piece.

7. An adaptive magnetic fluid pressure resistant test electrode device according to claim 1 or 2, wherein the high voltage inner electrode assembly comprises:

An inner electrode body;

And the electrode metal rod penetrates through the inner electrode body, and two ends of the electrode metal rod are respectively extended to two sides of the inner electrode body.

8. An adaptive magnetohydrodynamic pressure test electrode device according to claim 1 or 2, further comprising:

And the image collector is used for collecting images of the shielding cover sample supported by the outer side of the high-voltage inner electrode assembly so as to judge whether the shielding cover sample is installed in place and/or whether the magnetic fluid completely covers the outer wall of the shielding cover sample.

9. The adaptive magnetohydrodynamic pressure test electrode device according to claim 8, wherein,

The image collector is connected with a controller and is used for receiving the image collected by the image collector and controlling the magnetic field generating assembly based on the image so as to control the distribution of the space magnetic field generated by the magnetic field generating assembly and further control the space distribution of the magnetic fluid.

10. An adaptive magnetic fluid pressure resistant test electrode device according to claim 1 or claim 2, further comprising a support assembly supporting the high voltage inner electrode assembly, the support assembly comprising:

A support base plate;

The first support frame is arranged on the support bottom plate along a first preset direction and is used for supporting the image collector;

The second support frame is arranged on the support bottom plate along a second preset direction, the first preset direction and the second preset direction form an included angle, and the second support frame is used for supporting the high-voltage inner electrode assembly so that the high-voltage inner electrode assembly is supported between the two image collectors;

The third support frame is arranged on the support bottom plate, the magnetic field generating assembly is arranged on the third support frame in a mode of being capable of adjusting the position along the height direction, and the third support frame is used for movably supporting the magnetic field generating assembly.