CN111929545A - Interface breakdown voltage testing device, system and method with controllable pressure - Google Patents
Interface breakdown voltage testing device, system and method with controllable pressure Download PDFInfo
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- CN111929545A CN111929545A CN202010754492.9A CN202010754492A CN111929545A CN 111929545 A CN111929545 A CN 111929545A CN 202010754492 A CN202010754492 A CN 202010754492A CN 111929545 A CN111929545 A CN 111929545A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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Abstract
The invention discloses a pressure-controllable interface breakdown voltage testing device, a system and a method, wherein the testing device comprises a lower base, a frame, a lower support frame, an upper base and a metal electrode assembly; the frame is fixed on the lower base and consists of an upper cross beam, a lower cross beam and an upright post connected between the two ends of the upper cross beam and the lower cross beam; the lower support frame is fixedly connected with the lower cross beam of the frame, the upper support frame is movably matched with the upper cross beam of the frame, two opposite ends of the lower support frame and the upper support frame are arranged in the frame, the upper base is fixedly connected with the upper end face of the upper support frame, and the pressure regulating block is arranged on the upper base. The testing system comprises a pressure regulator, a testing transformer, a protective water resistance and the testing device which are electrically connected in sequence, wherein the testing device is arranged in the oil cylinder. The testing device, the system and the method can be used for researching the influence rule of factors such as surface roughness of an interface, interface pressure and interface filler on interface breakdown voltage, thereby providing guidance for design, manufacture, operation, maintenance and the like of the power cable joint.
Description
Technical Field
The invention belongs to the technical field of electrical performance testing, relates to a device for testing breakdown voltage, and particularly relates to a device, a system and a method for testing the breakdown voltage of a pressure-controllable interface.
Background
Since 2000 years, China has developed large-scale cable in-ground work, and the total length of underground power cables in China currently in operation exceeds 100 kilometers. Among them, crosslinked polyethylene power cables are most widely used because of their excellent electrical and mechanical properties. Due to the limitation of production and transportation conditions, the production length of each cable coil is difficult to meet the requirement of actual production operation, so that a plurality of sections of cables need to be connected by using cable connectors to meet the requirement of actual cable length. Due to the unique multilayer solid composite insulation structure of the cable accessories such as the cable joint and the like, the cable accessories need to be installed and molded under field conditions, and the factors influencing the insulation performance are more, so that the cable joint becomes a weak link of an underground cable system. The field operation experience shows that the creepage breakdown along the surface among the multi-layer solid insulation interfaces of the cable joint is the main cause of the fault of the cable joint.
The cable joint is insulated by the cable joint and the cable body to form a double-layer solid composite insulation structure in the operation process, and the interface breakdown strength between the double-layer solid insulation of the cable joint is an important parameter for representing the insulation performance of the cable joint. Earlier researches show that factors such as surface roughness of an insulating interface, interface pressure, elastic modulus of a solid medium, interface fillers and the like play a vital role in the interface breakdown voltage of the composite insulating structure.
In order to find out the specific influence rule of each factor on the breakdown voltage of the insulation interface of the cable joint and the change rule of the interface insulation strength caused by insulation aging in the cable operation process, a device capable of testing the breakdown voltage of the composite insulation medium interface is necessary to be designed, and the influence of each factor on the breakdown voltage of the composite insulation medium interface is researched, so that a theoretical basis is provided for the design, manufacture, operation, maintenance and the like of the actual power cable joint.
Disclosure of Invention
In view of the technical current situation, the invention provides a pressure-controllable interface breakdown voltage testing system and an interface breakdown voltage testing device applied to the same, which are used for researching the influence rule of factors such as surface roughness of an interface, interface pressure, elastic modulus of a solid medium, interface filler and the like on the interface breakdown voltage, so as to provide guidance for design, manufacture, operation, maintenance and the like of a power cable joint.
The invention further provides a method for testing the interface breakdown voltage of the insulating material by using the interface breakdown voltage testing system.
The invention provides a pressure-controllable interface breakdown voltage testing device which comprises a lower base, a frame, a lower support frame, an upper base and a metal electrode assembly, wherein the lower base, the frame, the lower support frame, the upper support frame and the upper base are made of insulating materials; the frame is fixed on the lower base and consists of an upper cross beam, a lower cross beam and an upright post connected between the two ends of the upper cross beam and the lower cross beam; the lower support frame is fixedly connected with the lower cross beam of the frame, the upper support frame is movably matched with the upper cross beam of the frame, and two opposite ends of the lower support frame and the upper support frame are arranged in the frame and used for clamping a tested piece formed by butting two test samples; the upper base is arranged on the upper end face of the upper support frame, and a pressure regulating block is arranged on the upper base; the metal electrode assembly comprises a first metal electrode and a second metal electrode, the first metal electrode and the second metal electrode penetrate through two side faces of the frame and extend into the frame, and contact faces of the first metal electrode and the second metal electrode are respectively in contact with side faces of butt joint positions of two samples.
The pressure-controllable interface breakdown voltage testing device is mainly used for testing the interface breakdown voltage of the composite insulating medium, so that a sample is an interface test product consisting of two solid insulating materials, the two solid insulating materials are preferably cuboid sheets with the same shape, the thickness of the cuboid sheets does not exceed the width of the upper support frame and the lower support frame, and the two solid insulating materials can be the same or different materials.
In the interface breakdown voltage testing device with controllable pressure, a first clamping interface which is adaptive to the width of the lower cross beam is formed in the center of the lower end face of the lower support frame, and the lower support frame is clamped on the lower cross beam through the first clamping interface.
In the pressure-controllable interface breakdown voltage testing device, a second clamping interface which is adaptive to the width of the upper cross beam is arranged at the central position of the upper end face of the upper support frame, and a connecting rod which is integrally formed with the upper support frame is arranged at the central position of the second clamping interface; the through hole is arranged at the center of the upper cross beam, and the connecting rod penetrates through the through hole and can move up and down along the through hole. Through setting up the connecting rod, can make the better location of upper bracket and reciprocate. The quantity of connecting rod does not have special restriction, for reducing the processing degree of difficulty, set up one usually can.
In the interface breakdown voltage testing device with controllable pressure, the testing device further comprises a supporting rod for enhancing the stability of the upper supporting frame, and the supporting rod is arranged between the upper base and the upper cross beam of the frame and used for assisting in fixing the upper supporting frame. The support rod is preferably a screw or a threaded rod.
In the above-mentioned interface breakdown voltage testing apparatus with controllable pressure, the upper base and the lower base are preferably rectangular plate-shaped structures with the same size. The lower base is mainly used for supporting the whole device, and the upper base is mainly used for fixing the upper support and placing the pressure regulating piece, so that the fixing shape of the upper base can be designed according to actual requirements.
In the above-mentioned controllable interface breakdown voltage testing arrangement of pressure, first metal electrode and second metal electrode structure are the same, all include the head and can dismantle the afterbody of being connected with the head, and the head is the round platform column structure that the diameter is crescent gradually, and for preventing edge effect, the lower limb of round platform is preferred smooth circular-arc. The detachable connection is preferably a threaded connection.
In the interface breakdown voltage testing device with controllable pressure, the tail ends of the first metal electrode and the second metal electrode, which are positioned outside the frame, are provided with fixing pieces. The fixing member is preferably a nut, and the number of nuts at the outer end of each metal electrode is preferably two, and more preferably a wing nut.
In the above pressure-controllable interface breakdown voltage testing apparatus, the pressure regulating block is preferably a weight. The weight is self-weighted, so that the pressure applied to the interface of the sample can be quickly adjusted according to actual needs.
The invention also provides a test system of the pressure-controllable interface breakdown voltage test device, which comprises the pressure-controllable interface breakdown voltage test device, a voltage regulator, a test transformer, a protective water resistor and an oil cylinder, wherein the voltage regulator, the test transformer, the protective water resistor and the interface breakdown voltage test device are sequentially connected in series, and the interface breakdown voltage test device is placed in the oil cylinder filled with silicon oil or transformer oil.
The invention also provides a pressure-controllable interface breakdown voltage test method, which is used for testing the interface breakdown voltage of the insulating material by using the test system and comprises the following steps:
(1) is mounted by the test piece
Placing a tested piece obtained by butting two samples between an upper support frame and a lower support frame, so that the test surface of the tested piece is parallel to the end surface of the lower base/the upper base, and the two side surfaces of the tested piece are parallel to the end surfaces of the heads of the first metal electrode and the second metal electrode on the two sides; moving the first metal electrode and the second metal electrode inwards to enable the head end faces of the first metal electrode and the second metal electrode to be attached to two side faces of the butt joint position of the two samples; a pressure regulating block is arranged on the upper surface of the upper base, so that the interface of the tested piece reaches the required pressure;
(2) circuit connection
Placing the interface breakdown voltage testing device into an oil cylinder filled with silicone oil or transformer oil, electrically connecting a voltage regulator, a testing transformer, a protective water resistor and a first metal electrode of the interface breakdown voltage testing device in sequence, and grounding a grounding port of the voltage regulator (8), a grounding port of the testing transformer (12) and a second metal electrode in the interface breakdown voltage testing device;
(3) breakdown test
And (3) performing an interface unit breakdown experiment by adopting a step-by-step boosting method, adjusting a voltage regulator to boost the voltage by 1kV every 1 minute, wherein the boosting rate is not more than 200V/s until an interface sample is broken down, and recording the voltage during breakdown as the interface breakdown voltage of the sample.
In the method for testing the interface breakdown voltage with controllable pressure, in order to prevent the breakdown along the outer surface of the sample, the distance between the edge of the inner end part of the first metal electrode and the edge of the sample and the edge of the inner end part of the second metal electrode is more than 1 cm.
The interface breakdown voltage testing device, the system and the method with controllable pressure provided by the invention have the following beneficial effects:
(1) according to the interface breakdown voltage testing device with controllable pressure, the upper supporting frame and the lower supporting frame are arranged at the upper cross beam and the lower cross beam of the frame to clamp a sample, and the first metal electrode and the second metal electrode are arranged on the left upright post and the right upright post of the frame, so that the electrodes are positioned outside a tested interface, and the influence of metal defects introduced into a normal interface of a built-in electrode on breakdown testing is avoided.
(2) The upper support frame of the testing device can move up and down along the vertical direction, so that the testing device can adapt to samples with different heights; when the thickness of the tested sample is the same, the metal electrode positions on the two sides are relatively fixed after the sample is installed, and the influence on the test structure caused by the movement of the electrode positions is avoided.
(3) The testing device is characterized in that the pressure regulating part is arranged on the upper base, and the pressure of the interface of the tested sample can be changed by replacing the pressure regulating parts with different masses, so that the interface breakdown voltage under different interface pressures can be tested, and the operation is flexible and simple; and then directly adjusting the sample, changing the factors such as the surface roughness of the interface, the interface filler, the elastic modulus of the solid medium and the like, and testing the interface breakdown voltage under different factors.
(4) The interface breakdown voltage testing system with controllable pressure is formed by combining the interface breakdown voltage testing device, the voltage regulator, the testing transformer, the protective water resistor and the oil cylinder, wherein the voltage regulator, the testing transformer, the protective water resistor and the oil cylinder are all common equipment parts in the field, no special requirements on equipment are required, and the interface breakdown voltage testing system is simple in structure and convenient and fast to operate.
(5) On the whole, the testing device provided by the invention is ingenious in design, the testing system is simple in composition, and the testing method is safe and easy to operate, and can be effectively applied to researching the influence rule of factors such as surface roughness of an interface, interface pressure, elastic modulus of a solid medium, interface filler and the like on interface breakdown voltage, so that guidance is provided for design, manufacture, operation, maintenance and the like of an actual power cable joint.
Drawings
FIG. 1 is a schematic structural diagram of an interface breakdown voltage testing apparatus with controllable pressure in example 1;
FIG. 2 is a schematic structural diagram of a system for testing the breakdown voltage of an interface with controllable pressure in example 2;
FIG. 3 is three views of the upper base/lower base in embodiment 1, wherein (a) is a front view, (b) is a side view, and (c) is a top view;
FIG. 4 is three views of the frame in example 1, wherein (a) is a front view, (b) is a side view, and (c) is a top view;
FIG. 5 is a three-dimensional view of the lower support frame of example 1, wherein (a) is a front view, (b) is a side view, and (c) is a top view;
FIG. 6 is a three-dimensional view of the upper support frame in example 1, wherein (a) is a front view, (b) is a side view, and (c) is a top view;
FIG. 7 is three views of a metal electrode in example 1, wherein (a) is a front view, (b) is a side view, and (c) is a top view;
description of reference numerals: 1. a lower base; 2. a frame; 201. a first through hole; 202. a second through hole; 203. a third through hole; 3. a lower support frame; 301. a first card interface; 4. an upper support frame; 401. a second card interface; 402. a connecting rod; 5. an upper base; 6. a support bar; 7. a metal electrode; 701. a first metal electrode; 702. a second metal electrode; 8. a voltage regulator; 9. testing the transformer; 10. water resistance is protected; 11. an oil cylinder; 12. an interface breakdown voltage testing device; 13. a tested piece; 14. and (5) adjusting the pressure.
Detailed Description
So that the technical solutions of the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, belong to the present invention.
In the following embodiments, the description of length, width and height is referred to, wherein length refers to the horizontal left and right direction, width refers to the horizontal front and rear direction, and height refers to the direction perpendicular to the horizontal plane.
Example 1
In this embodiment, the structure of the interface breakdown voltage testing device 12 with controllable pressure is shown in fig. 1, and it includes a lower base 1, a frame 2, a lower support 3, an upper support 4, an upper base 5, a voltage regulating block 14, and a metal electrode assembly 7. The frame 2 is fixed on the lower base 1 and consists of an upper cross beam, a lower cross beam and an upright post connected between the two ends of the upper cross beam and the lower cross beam; the lower support frame 3 is fixedly connected with a lower cross beam of the frame, the upper support frame 4 is movably matched with an upper cross beam of the frame, and two opposite ends of the lower support frame 3 and the upper support frame 4 are arranged in the frame 2 and used for clamping two ends of a tested piece 13 (obtained by butting two test samples) and transmitting pressure to the tested piece; the upper base is arranged on the upper end surface of the upper support frame, and a pressure regulating block 14 is arranged on the upper base; the metal electrode assembly 7 comprises a first metal electrode 701 and a second metal electrode 702 which have the same structural size; the first metal electrode 701 and the second metal electrode 702 penetrate through the upright columns on the two sides of the frame 2 and extend into the frame, and the contact surfaces of the first metal electrode 701 and the second metal electrode 702 are respectively in close contact with the side surfaces of the butt joint positions of the two samples. The lower base 1, the lower support frame 3, the frame 2, the upper support frame 4 and the upper base 5 are all made of insulating materials. The pressure regulating block 14 is used for enabling the interface of the tested piece 13 to reach the required pressure; in this embodiment, the pressure adjusting block is a weight, and the weight of the pressure adjusting block (weight) can be selected according to the actual interface setting pressure.
As shown in FIG. 3, the lower base 1 and the upper base 5 are both rectangular parallelepiped structures, 170mm long, 170mm wide and 30mm high.
As shown in fig. 4, the frame 2 is a rectangular frame formed integrally, and the entire length of the frame 2 is 120mm, the width is 30mm, and the height is 150 mm. The height of entablature and bottom end rail is 20mm, and the length of stand is 25 mm. A through hole I201 with the diameter of 10mm is formed in the center of the upper cross beam along the vertical direction; the center positions of the two upright posts are provided with a second through hole 202 and a third through hole 203 which are 15mm in diameter along the horizontal direction. The lower beam of the frame 2 is fixed at the center of the lower base 1.
As shown in fig. 5, the lower support 3 is a rectangular plate-shaped structure with a length of 120mm, a width of 20mm and a height of 50mm, and a first clamping interface 301 adapted to the width of the lower beam is formed at the central position of the lower end surface of the lower support, and the first clamping interface 301 has a length of 35mm, a width of 20mm and a height of 20 mm. The lower support frame 3 is clamped on the lower cross beam of the frame 2 through an opening connector.
As shown in fig. 6, the upper support frame 4 is a rectangular plate-shaped structure with a length of 120mm, a width of 20mm and a height of 80mm, a second clamping interface 401 adapted to the width of the upper beam is arranged at the center of the upper end face of the upper support frame, and the second clamping interface 401 is 30mm long, 20mm wide and 50mm high. The central position of the second clamping interface is designed with a connecting rod 402 which is integrally formed with the upper support frame 4, and the diameter of the connecting rod 402 is 10mm and the height of the connecting rod is 50 mm. The upper supporting frame 4 is arranged on the upper cross beam through the second clamping interface, and the connecting rod penetrates through the first through hole 201 and is arranged in the frame 2. The upper support frame 4 can move up and down along the through hole I. The upper end surface of the lower support frame 3 is opposite to the lower end surface of the upper support frame 4 and is positioned in the frame 2 for clamping a tested piece. The upper end surface of the upper support frame 4 is fixed at the central position of the upper base 5. As shown in fig. 1, in order to further assist in fixing the upper base 5, support bars 6 are provided between the upper base 5 and both ends of the frame. In this embodiment, the support rods 6 are two screws, and are respectively connected between the upper base 5 and two ends of the frame. Specifically, the support rod 6 is fixed on the upper end face of the frame 2, the upper base 5 is provided with a through hole at a corresponding position, the support rod 6 penetrates through the upper base 5 through the through hole, the diameter of the through hole is slightly larger than that of the support rod for assisting in keeping the balance of the upper base 5, and the upper base can move up and down along the support rod.
The first metal electrode and the second metal electrode are identical in structure. The metal electrode structure will be described below by taking the first metal electrode as an example, and as shown in fig. 7, the first metal electrode includes a head portion and a tail portion. The head part is an electrode contact end and is in a circular truncated cone-shaped structure with the diameter gradually increasing, and the lower edge of the circular truncated cone is in a smooth circular arc shape. The height of the truncated cone-shaped head is 20mm, and the diameter of the lower end face is 36 mm. The tail part is integrally of a round rod structure, the length of the tail part is 50mm, and the diameter of the tail part is 15 mm. The tail end and the front end of the tail part are both provided with external threads. The front end screw thread is used for being connected with the head, the length is 20mm, the diameter is 10mm, and the head is provided with a corresponding threaded hole. The tail end is used for assembling a nut, and the thread section is 15mm long and 15mm in diameter. As shown in fig. 1, the first metal electrode 701 and the second metal electrode are placed in the frame 2 with their heads extending from the second through hole 202 and the third through hole 203 on the two sides of the frame, and the first metal electrode 701 and the second metal electrode 702 can move left and right along the second through hole and the third through hole respectively in the horizontal direction, so that they are in contact with the side surfaces of the two sample docking positions. Two conventional nuts matched with the threads are assembled at the tail part of the first metal electrode to serve as fixing pieces, and the two nuts clamp the metal lead while fixing the first metal electrode. The tail part of the second metal electrode is provided with a butterfly nut and a conventional nut which are used as fixing pieces, and the two nuts clamp the metal lead while fixing the second metal electrode. Since one end is grounded, the ground wire can be connected to the electrode for a long time using a conventional nut. The other end of the butterfly nut is required to be connected with a high-voltage wire, and the high-voltage wire is required to be taken down after the experiment is finished every time, so that the butterfly nut is used for facilitating the taking of the high-voltage wire. In addition, in order to guarantee that the sample is put into the back, the sample surface is hugged closely all the time to the electrode surface, avoids the sample to slide, and the cover is equipped with the spring on the second metal electrode is located the position between head and the corresponding stand of frame is inboard, can avoid the sample to slide the experimental error that causes like this, improves the experiment accuracy.
Example 2
The present embodiment is a pressure-controllable interface breakdown voltage test system provided in embodiment 1, based on the pressure-controllable interface breakdown voltage test device provided in embodiment 1, and the structure of the system is shown in fig. 2, and the system includes the pressure-controllable interface breakdown voltage test device 12, the voltage regulator 8, the test transformer 9, the protective water resistor 10, and the oil cylinder 11 in embodiment 1. The interface breakdown voltage testing device 12 is placed in an oil cylinder 11 filled with silicon oil or transformer oil, the voltage regulator 8, the testing transformer 9, the protective water resistor 10 and a first metal electrode of the interface breakdown voltage testing device 12 are sequentially connected in series, and a second metal electrode of the interface breakdown voltage testing device 12 is grounded.
In this embodiment, a test piece is manufactured by using cross-linked polyethylene and silicone rubber to perform a test, specifically, the cross-linked polyethylene and the silicone rubber are respectively pressed into sheets of 30mm × 60mm × 3mm by using a flat vulcanizing machine, two sheets are selected as samples, surfaces of the two samples of 60mm × 3mm are used as test surfaces, the test surfaces are polished to be flat by using 240-mesh abrasive paper, and the test surfaces are aligned and attached to prepare the test piece 13.
The method for testing the breakdown voltage of the interface with controllable pressure comprises the following steps:
(1) is mounted by the test piece
Placing a tested piece 13 obtained by butting two samples at the central position of the lower support frame 3, wherein the test surface of the sample is parallel to the end surface of the upper base 5/the lower base 1, and the two side surfaces of the sample are parallel to the head end surfaces of the first metal electrode and the second metal electrode at the two sides; moving the first metal electrode and the second metal electrode inwards until the first metal electrode and the second metal electrode are in close contact with the side faces of the butt joint positions of the two samples, and then fixing the first metal electrode and the second metal electrode; moving the upper support frame 4 downwards to press the upper surface of one of the samples; then a pressure regulating block (weight) with the mass of 2kg is placed on the upper surface of the upper base 5, so that the interface of the sample reaches the required pressure;
(2) circuit connection
Placing an interface breakdown voltage testing device 12 into an oil cylinder 11 filled with silicone oil or transformer oil, electrically connecting a voltage regulator 8, a testing transformer 9, a protective water resistor 11 and a first metal electrode of the interface breakdown voltage testing device 12 in sequence, and grounding a second metal electrode in the interface breakdown voltage testing device 12, a grounding port of the voltage regulator 8 and a grounding port of the testing transformer 9;
(3) breakdown test
And (3) performing an interface unit breakdown experiment by adopting a step-by-step boosting method, starting a power supply of a voltage regulator 8, regulating the voltage regulator to boost the voltage by 1kV every 1 minute, keeping the voltage to slowly increase at a constant speed as much as possible when boosting the voltage every time, keeping the boosting rate not more than 200V/s until an interface sample 13 is broken down, recording the breakdown voltage, and turning off the power supply. The recorded breakdown voltage is the interface breakdown voltage of the silicon rubber and the cross-linked polyethylene sample.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (9)
1. The utility model provides a controllable interface breakdown voltage testing arrangement of pressure which characterized in that: the device comprises a lower base (1), a frame (2), a lower support frame (3), an upper support frame (4), an upper base (5) and a metal electrode assembly (7), wherein the lower base is made of insulating materials; the frame (2) is fixed on the lower base (1) and consists of an upper cross beam, a lower cross beam and upright posts connected between the two ends of the upper cross beam and the lower cross beam; the lower support frame (3) is fixedly connected with the lower cross beam of the frame, the upper support frame (4) is movably matched with the upper cross beam of the frame, and two opposite ends of the lower support frame (3) and the upper support frame (4) are arranged in the frame (2) and used for clamping a tested piece (13) formed by butt joint of two test samples; the upper base (5) is fixedly connected with the upper end face of the upper support frame, and a pressure regulating block (14) is placed on the upper base; the metal electrode assembly (7) comprises a first metal electrode (701) and a second metal electrode (702), the first metal electrode (701) and the second metal electrode (702) penetrate through two side faces of the frame (2) and extend into the frame, and contact faces of the first metal electrode (701) and the second metal electrode (702) are respectively in contact with side faces of butt joint positions of two samples.
2. The pressure controllable interface breakdown voltage testing apparatus of claim 1, wherein: the lower end face center position department of lower carriage (3) sets up the joint mouth (301) that suits with the bottom end rail width, and bottom end rail (3) are arranged in on the bottom end rail of frame (2) through joint mouth (301) card.
3. The pressure controllable interface breakdown voltage testing apparatus of claim 1, wherein: the middle position of the lower end face of the upper support frame (4) is provided with a second clamping interface (401) which is adaptive to the width of the upper cross beam, the middle position of the second clamping interface (401) is provided with a connecting rod (402) which is integrally formed with the upper support frame, the upper support frame (4) is arranged on the upper cross beam through the second clamping interface, and the connecting rod penetrates through the upper cross beam of the frame and is arranged in the frame (2).
4. The pressure controllable interface breakdown voltage testing apparatus of claim 1, wherein: the testing device further comprises a supporting rod (6), wherein the supporting rod (6) is arranged between the upper base (5) and the two ends of the frame (2).
5. The pressure controllable interface breakdown voltage testing apparatus of claim 1, wherein: the first metal electrode and the second metal electrode are identical in structure and respectively comprise a head part and a tail part detachably connected with the head part, and the head part is of a round table-shaped structure with the diameter gradually increased.
6. The pressure controllable interface breakdown voltage testing device of claim 1 or 5, wherein: the tail ends of the first metal electrode and the second metal electrode, which are positioned outside the frame (2), are provided with fixing pieces.
7. The pressure controllable interface breakdown voltage testing device of claim 6, wherein: and a spring is sleeved on the part of the second metal electrode between the head and the inner side of the frame upright post.
8. The utility model provides a controllable interface breakdown voltage testing arrangement's of pressure test system which characterized in that: the interface breakdown voltage testing device comprises the interface breakdown voltage testing device (12) with controllable pressure as claimed in any one of claims 1 to 8, a voltage regulator (8), a test transformer (9), a protective water resistor (10) and an oil cylinder (11), wherein the voltage regulator (8), the test transformer (9), the protective water resistor (10) and the interface breakdown voltage testing device (12) are sequentially connected in series, and the interface breakdown voltage testing device (12) is placed in the oil cylinder (11) filled with silicon oil or transformer oil.
9. A pressure-controllable interface breakdown voltage testing method is characterized in that: the test system of claim 9 for insulation interface breakdown voltage testing, comprising the steps of:
(1) is mounted by the test piece
Placing a tested piece (13) obtained by butting two samples between an upper support frame (4) and a lower support frame (3), so that the test surface of the tested piece (13) is parallel to the end surfaces of a lower base (1)/an upper base (5), and the two side surfaces are parallel to the head end surfaces of a first metal electrode and a second metal electrode on the two sides; moving the first metal electrode and the second metal electrode inwards to enable the head end faces of the first metal electrode and the second metal electrode to be attached to two side faces of the butt joint position of the two samples; a pressure regulating block is arranged on the upper surface of the upper base (5) to ensure that the interface of the tested piece (13) reaches the required pressure;
(2) circuit connection
Placing an interface breakdown voltage testing device (12) into an oil cylinder (11) filled with silicon oil or transformer oil, electrically connecting a voltage regulator (8), a test transformer (9), a protective water resistor (10) and a first metal electrode of the interface breakdown voltage testing device (12) in sequence, and grounding a grounding port of the voltage regulator (8), a grounding port of the test transformer (12) and a second metal electrode in the interface breakdown voltage testing device (12);
(3) breakdown test
And (3) performing an interface unit breakdown experiment by adopting a step-by-step boosting method, adjusting a voltage regulator (8) to increase the voltage by 1kV every 1 minute, wherein the boosting rate is not more than 200V/s until an interface sample (13) breaks down, and recording the voltage during breakdown as the interface breakdown voltage of the sample (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010754492.9A CN111929545A (en) | 2020-07-31 | 2020-07-31 | Interface breakdown voltage testing device, system and method with controllable pressure |
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| CN202010754492.9A CN111929545A (en) | 2020-07-31 | 2020-07-31 | Interface breakdown voltage testing device, system and method with controllable pressure |
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| CN111929545A true CN111929545A (en) | 2020-11-13 |
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| CN202010754492.9A Pending CN111929545A (en) | 2020-07-31 | 2020-07-31 | Interface breakdown voltage testing device, system and method with controllable pressure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666433A (en) * | 2020-12-29 | 2021-04-16 | 全球能源互联网研究院有限公司 | Cable accessory insulation composite interface breakdown voltage testing device |
| CN113791316A (en) * | 2021-08-05 | 2021-12-14 | 北京大学（天津滨海）新一代信息技术研究院 | High voltage breakdown measuring device |
| CN113984888A (en) * | 2021-11-23 | 2022-01-28 | 远东电缆有限公司 | Method and device for testing bending property of polypropylene high polymer material |
| CN114184902A (en) * | 2021-11-04 | 2022-03-15 | 荣耀终端有限公司 | Insulating adhesive testing device, insulating adhesive testing system and insulating adhesive testing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308189A (en) * | 2008-06-24 | 2008-11-19 | 中国科学院电工研究所 | Medium insulation properties measuring apparatus for gas-liquid two-phase fluid state |
| CN102435925A (en) * | 2011-11-21 | 2012-05-02 | 中国人民解放军国防科学技术大学 | Device and method for measuring electrical strength of material under stress condition |
| CN105717434A (en) * | 2016-03-30 | 2016-06-29 | 国家电网公司 | Electrode device for measuring electrical strength of composite insulator silicon rubber umbrella skirt and measuring method |
| CN108879496A (en) * | 2018-06-26 | 2018-11-23 | 广西电网有限责任公司电力科学研究院 | A method of improving cable accessory interface breakdown intensity |
| CN110600997A (en) * | 2019-09-19 | 2019-12-20 | 哈尔滨理工大学 | Experimental electrode structure for accurately adjusting interelectrode barrier and operation method thereof |
| CN110824302A (en) * | 2019-09-30 | 2020-02-21 | 中国电力科学研究院有限公司 | Device and method for measuring breakdown voltage of direct-current electric field of insulating oil |
-
2020
- 2020-07-31 CN CN202010754492.9A patent/CN111929545A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308189A (en) * | 2008-06-24 | 2008-11-19 | 中国科学院电工研究所 | Medium insulation properties measuring apparatus for gas-liquid two-phase fluid state |
| CN102435925A (en) * | 2011-11-21 | 2012-05-02 | 中国人民解放军国防科学技术大学 | Device and method for measuring electrical strength of material under stress condition |
| CN105717434A (en) * | 2016-03-30 | 2016-06-29 | 国家电网公司 | Electrode device for measuring electrical strength of composite insulator silicon rubber umbrella skirt and measuring method |
| CN108879496A (en) * | 2018-06-26 | 2018-11-23 | 广西电网有限责任公司电力科学研究院 | A method of improving cable accessory interface breakdown intensity |
| CN110600997A (en) * | 2019-09-19 | 2019-12-20 | 哈尔滨理工大学 | Experimental electrode structure for accurately adjusting interelectrode barrier and operation method thereof |
| CN110824302A (en) * | 2019-09-30 | 2020-02-21 | 中国电力科学研究院有限公司 | Device and method for measuring breakdown voltage of direct-current electric field of insulating oil |
Non-Patent Citations (1)
| Title |
|---|
| 沈才芳 等: "《电弧炉炼钢工艺与设备》", vol. 1, 冶金工业出版社, pages: 29 - 31 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666433A (en) * | 2020-12-29 | 2021-04-16 | 全球能源互联网研究院有限公司 | Cable accessory insulation composite interface breakdown voltage testing device |
| CN113791316A (en) * | 2021-08-05 | 2021-12-14 | 北京大学（天津滨海）新一代信息技术研究院 | High voltage breakdown measuring device |
| CN114184902A (en) * | 2021-11-04 | 2022-03-15 | 荣耀终端有限公司 | Insulating adhesive testing device, insulating adhesive testing system and insulating adhesive testing method |
| CN113984888A (en) * | 2021-11-23 | 2022-01-28 | 远东电缆有限公司 | Method and device for testing bending property of polypropylene high polymer material |
| CN113984888B (en) * | 2021-11-23 | 2023-12-19 | 远东电缆有限公司 | Bending performance test method and device for polypropylene high polymer material |
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