CN110456235B - Film electric weak point detector - Google Patents
Film electric weak point detector Download PDFInfo
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- CN110456235B CN110456235B CN201910637563.4A CN201910637563A CN110456235B CN 110456235 B CN110456235 B CN 110456235B CN 201910637563 A CN201910637563 A CN 201910637563A CN 110456235 B CN110456235 B CN 110456235B
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- G—PHYSICS
- 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
Film electric weak point detector: the insulating bottom plate is provided with a conductive rubber plate placing hole with the depth smaller than the thickness of the negative conductive rubber plate, and the negative copper bar is fixedly connected with the negative conductive rubber plate. The middle end of the film sample piece is spread on the negative conductive rubber plate for electric weak point detection. The positive insert and the positive insert pressing plate are detachably connected, and the lower surface of the positive insert pressing plate is positioned below the lower surface of the positive insert pressing plate; the positive copper bar and the positive insert pressing plate are fixedly connected and extend out of the front end of the positive insert pressing plate, and the rear end of the positive copper bar is electrically connected with the positive insert. The lower surface of the positive insert is pressed on the film sample piece during detection. The four film sample clamping pieces are arranged outside the front end and the rear end of the negative conductive rubber plate in a pairwise and same group. The two sets of clamping devices are oppositely arranged at the left and right sides of the negative conductive rubber plate, and the pressing strip is positioned above the positive insert pressing plate and is connected with the pressing strip mounting arm; the layering installation arm is articulated with operation arm and base, and operation arm and base are articulated.
Description
Technical Field
The invention relates to a detection instrument, in particular to a film electric weakness detector for electric insulation.
Background
The following two main conventional techniques for testing electrical weak points of films for electrical insulation are proposed:
the first conventional technical solution: the method for testing the roll comprises the steps of rolling a narrow strip and rolling a wide strip, wherein the method uses a rolling shaft as a negative electrode, uses an aluminum foil or a conductive adhesive tape as a positive electrode, places a film sample piece between the positive electrode and the negative electrode, and rotates the film sample piece at a constant speed under the traction of the rolling shaft to realize the continuous detection of the electrical weakness performance of the rolled film sample piece. For example, application No. 201810104242.3, application publication No. CN 108226729 a, an inventive patent application entitled "high precision thin film electrical weakness tester". This solution has the following drawbacks: 1. the main guiding device and the negative pole are roll shafts, and parts such as bearings, servo motors and the like need to be arranged to realize the continuous detection of the coiled film sample piece, so the manufacturing cost is high; 2. is not suitable for the film test with larger ductility;
the second conventional technical scheme is as follows: the flat plate method is suitable for testing wide film samples, the positive and negative electrodes are smooth planes, the film samples need to be cut into the sizes of corresponding unit areas and placed between the positive and negative electrodes, and therefore the unit area electric weakness of the film samples can be tested. This solution has the following drawbacks: 1. the positive part is wrapped by the soft rubber sheet by the aluminum foil, so that manual wrapping operation is inconvenient, crease lines or overlapping at the edge of the aluminum foil are easily caused due to the non-standard wrapping operation, and a film sample to be detected is easily scratched at the bulge of the crease lines to cause detection damage of the film sample; 2. the film sample size detection device is only suitable for detecting film samples with larger sizes, and the sizes of the film samples need to be customized according to the detection device; 3. because the detected film sample comes from the curled film, perfect smooth laying and positioning can not be realized, and the operation is inconvenient; 4. the positive plate is lack of a positioning device, the positive and negative components completely depend on the gravity action on the compression pretightening force of the film sample piece, and the requirement on the levelness of the experiment table top is high; 5. the negative pole piece is movable, has high risk safety risk.
Disclosure of Invention
The invention mainly aims to provide a film electric weakness detector which has the advantages that the upper surface and the lower surface of a film sample to be detected can be closely attached to corresponding parts of a positive electrode and a negative electrode respectively, the film sample to be detected is easy to adapt to different width dimension specifications, and the film sample to be detected is easy to position.
The technical scheme adopted by the invention is as follows: a film electrical weakness detector: the device comprises an insulating bottom plate, a negative conductive rubber plate, a negative copper bar, a positive insert pressing plate, a positive copper bar, a film sample clamping piece group and a clamping device;
the insulating bottom plate is provided with a conductive rubber plate placing pit with the depth smaller than the thickness of the negative conductive rubber plate, and the rear end of the negative copper bar is fixedly connected with the right front corner of the negative conductive rubber plate; the middle end of the film sample piece in the front-back direction is spread on the negative conductive rubber plate to receive the electric weakness detection of the negative conductive rubber plate;
the positive insert and the positive insert pressing plate are detachably connected, and the lower surface of the positive insert pressing plate is positioned below the lower surface of the positive insert pressing plate; the middle or the left side of the rear end of the positive copper bar and the front end of the positive insert pressing plate is fixedly connected, the front end of the positive copper bar extends out of the front end of the positive insert pressing plate, and the rear end of the positive copper bar is electrically connected with the positive insert; during detection, the lower surface of the positive insert is pressed on the middle end of the film sample piece in the front-back direction;
the film sample piece clamping piece group comprises a clamping piece, a screw rod, a spring and a nut; the four film sample clamping pieces are arranged outside the front end and the rear end of the negative conductive rubber plate in pairs, the screws of the same film sample clamping piece group are arranged in a left-right opposite mode, and the lower ends of the screws penetrate through the stepped counter bores in the insulating bottom plate and are connected with the fine threads of the nuts; the spring is sleeved on the screw rod, and the lower end of the spring falls into a large hole at the upper end of the stepped counter bore;
the clamping device comprises a pressing strip, a pressing strip mounting arm, an operating arm and a base; the number of the clamping devices is two; the two bases are arranged outside the left edge and the right edge of the negative conductive rubber plate in a left-right opposite mode; the two pressing strips are in the front-back direction, are positioned above the positive insert pressing plate and are connected with one end of the pressing strip mounting arm; the other end of the layering mounting arm is hinged with the operation arm and the base at the same time, and the middle end of the operation arm is hinged with the base;
during detection, the lower surface of the positive insert and the lower surface of the corresponding end part of the clamping piece are pressed on the upper surface of the corresponding part of the film sample piece.
Before use, the present invention is mounted on a test method for detecting an electrical weak point of a thin film according to the specification of GBT 13542.2-2009 and a test device main body on which members and wires necessary for detection are mounted. The invention has a plurality of positive inserts connected with the positive insert pressing plate, the positive inserts and the positive insert pressing plate have the same connecting structure, different positive inserts can be selected to be connected with the positive insert pressing plate according to the width of the strip-shaped film sample piece to be detected before use, the width of the lower end of the selected positive insert is about 2 mm smaller than the width of the strip-shaped film sample piece to be detected, so that the perfect contact between the surface of the lower end of the positive insert and the upper surface of the corresponding section of the strip-shaped film sample piece to be detected is ensured during detection. Before the strip-shaped film sample piece to be detected is placed at the detection position, the elastic clamping pieces are rotated to separate from the placing channel of the strip-shaped film sample piece to be detected, the pressing strip is lifted, the connected positive insert and positive insert pressing plate assembly are lifted from the detection operation position, then the strip-shaped film sample piece to be detected is laid at the detection position, the elastic clamping pieces are lifted and rotated back to be placed on the strip-shaped film sample piece to be detected, the trend of the elastic clamping pieces is the left and right trend, the clamping force of the elastic clamping pieces for clamping the strip-shaped film sample piece to be detected on the surface of the insulating bottom plate is adjusted by adjusting the connecting position of the nut and the screw rod in the clamping piece group of the film sample piece, the connected connecting ends of the clamping pieces of the film sample piece and the screw rod are propped against the lower surface of the head of the screw rod by the spring, and meanwhile, a connecting end for preventing the film sample piece from being separated from the screw rod relative to the clamping piece is arranged between the lower surface of the head of the screw rod and the connecting ends of the clamping pieces of the film sample piece and the clamping pieces and the screw rod The rotation preventing structure is used for preventing the rotation. By manually rotating the screw, the film sample clamping piece can rotate along with the screw. If the contact surface of the strip-shaped film sample piece to be detected and the negative conductive rubber plate is found to be in an uneven state, the corresponding clamping piece with elasticity can be rotated towards the direction far away from the negative conductive rubber plate, the clamping piece with elasticity is always pressed on the surface of the strip-shaped film sample piece to be detected in the rotating process, after the corresponding surface of the strip-shaped film sample piece to be detected is leveled, the positive insert and the positive insert pressing plate assembly which are fixedly connected together are lifted and returned to the detection working position, then the pressing strip is pressed on the positive pressing plate to ensure that the lower surface of the positive insert and the corresponding surface of the strip-shaped film sample piece to be detected are reliably contacted and connected together, then the negative copper bar and the positive copper bar are respectively connected with the corresponding leads, and the corresponding film electric detection can be carried out after the weak point is connected. According to the invention, the corresponding detection operation of the electric weakness of the film can be carried out only by replacing the positive inserts with different widths according to the actual width of the strip-shaped film sample piece to be detected, and the upper surface and the lower surface of the film sample piece to be detected can be ensured to be closely attached to the lower surface of the positive insert and the upper surface of the negative conductive rubber plate respectively due to the fact that the thickness of the negative conductive rubber plate is higher than the depth of the conductive rubber plate placing pit, so that a reliable detection result can be obtained.
Preferably, two scales are further included. Two scale placing sinking grooves in the left and right directions are arranged on the insulating bottom plate. The two scale placing sunken grooves are respectively positioned in front of the conductive rubber plate placing pit and outside the rear pit edge and are positioned in front of the corresponding two stepped sunken holes. The thickness of the scale is less than or equal to the depth of the scale placing sinking groove. The preferred scheme is favorable for accurately and quickly placing the strip-shaped film sample piece to be detected to the detection position.
Preferably, the protective cover further comprises a transparent protective cover, and the front end of the transparent protective cover is provided with a negative copper bar passing notch and a positive copper bar passing notch. The lower edge of the side wall of the transparent protective cover is fixedly connected with the periphery of the insulating bottom plate. This preferred scheme is favorable to improving security and observable when detecting the operation on the one hand, and on the other hand also is favorable to the safety protection of detection device when not doing the detection.
Preferably, the insulating bottom plate is provided with two bumps for connecting with the base, and the lower end of the base is fixedly connected with the bumps. This preferred scheme for can guarantee can not be because of the adverse effect that insulating substrate roughness brought to the detection operation through modes such as changing or revising lug thickness, be favorable to clamping device's location installation simultaneously.
Preferably, the positive insert pressing plate is a conductive pressing plate, the rear end of the positive copper bar is fixedly connected with the positive insert pressing plate, and the lower surface of the rear end of the positive copper bar is electrically connected with the upper plate surface of the positive insert pressing plate; the device also comprises a clamping device rubber pad. The clamping device rubber pad and the pressing strip are fixedly connected together to form a combined pressing strip, and the lower surface of the clamping device rubber pad is located below the pressing strip. According to the preferred scheme, the electric connection structure of the positive copper bar and the positive insert is simple and reliable.
Preferably, a pressing strip connecting structure is arranged between the pressing strip and the pressing strip mounting arm. The pressing strip connecting structure comprises a middle connecting rod and a locking nut. The upper end and the lower end of the middle connecting rod are both provided with fine threads, the middle end of the middle connecting rod is provided with a structure for rotating the middle connecting rod, and the upper end of the middle connecting rod passes through a left-right-going slotted hole formed in the pressing strip mounting arm and then is in threaded connection with the locking nut, so that the middle connecting rod and the pressing strip mounting arm are connected together. The lower end of the middle connecting rod is in threaded connection with the middle of the pressing strip, so that the middle connecting rod and the pressing strip are connected together. The pressing strip and the pressing strip mounting arm are connected through one end of the pressing strip and one end of the pressing strip mounting arm through the pressing strip connecting structure. The preferred scheme is favorable for adjusting the position of the adjusting pressing strip to adapt to the width of the strip-shaped film sample piece to be detected.
Preferably, the insulating bottom plate is further provided with a positive insert pressing plate positioning column. This preferred scheme is favorable to improving the accurate positioning speed of anodal inserts clamp plate, guarantees the accurate location of anodal inserts clamp plate, and then improves the positioning accuracy and the positioning speed of anodal inserts, is favorable to improving detection achievement efficiency.
In conclusion, the beneficial effects of the invention are as follows: 1. the positive electrode part is formed by combining a positive electrode insert and a positive electrode insert pressing plate, the positive electrode copper bar is electrically connected with the positive electrode insert pressing plate, the conductive positive electrode insert can be replaced according to the front and back moving film sample piece to be tested, and other components do not need to be replaced; the positioning column structure of the positive insert pressing plate can greatly improve the positioning speed of the positive insert, so that the positioning column structure can easily meet the requirements of the detection operation of the electric weak points of film sample pieces with different widths; 2. the operation of the four film sample clamping piece groups is matched with the scale, so that the problem that perfect smooth laying and positioning cannot be realized when the detected film sample comes from a curled film can be well solved; 3. the clamping device and the negative conductive rubber plate are matched to operate, so that the requirement on the levelness of the experiment table top can be lowered, the processing and manufacturing cost is lowered, and meanwhile, the detection quality is improved; 4. the negative electrode conductive rubber plate is placed in the conductive rubber plate placing hole, and cannot be moved and fall off in the detection process, so that the operation safety is high.
Drawings
FIG. 1: an exploded schematic view of the present invention;
FIG. 2: the invention has a schematic structure after assembly;
FIG. 3: the invention is a schematic structural diagram of the assembled transparent protective cover taken away.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
As shown in fig. 1, 2 and 3, the invention includes an insulating bottom plate 1, a negative conductive rubber plate 2, a negative copper bar 3, a positive insert 5, a positive insert pressing plate 6, a positive copper bar 7, a film sample clamping set 8, a clamping device 9, two rulers 10 and a transparent protective cover 11.
The upper plate surface of the insulating bottom plate 1 is a rectangular plate surface. The side of this rectangle is for controlling the trend and move towards around with, and insulating base plate 1 is last to be equipped with the conductive rubber board that the degree of depth is less than 2 thicknesses of negative pole conductive rubber board and places hole 1.1, conductive rubber board is placed hole 1.1 and is closed the constitution by one being the rectangle, four sides and insulating base plate 1 go up the parallel hole main part of placing of face side and the preceding right angle of placing hole limit groove hole that extends right. Corresponding negative pole conductive rubber board 2 is for placing the negative pole conductive rubber board of hole 1.1 adaptation with the conductive rubber board, negative pole copper bar 3 then correspondingly is L shape copper bar, the rear end of negative pole copper bar 3 is pressed and is being located the negative pole conductive rubber board upper surface of placing hole limit groove hole and linking firmly mutually of the right front corner that realizes negative pole copper bar 3's rear end and negative pole conductive rubber board 2 with two bolt and nut combinations and negative pole conductive rubber board fixed connection together, thereby realize negative pole copper bar 3 and the electricity of negative pole conductive rubber board 2 and be connected, the front end of negative pole copper bar 3 extends backward and links to each other with the right-hand member of the rear end of negative pole copper bar 3. The middle end of the film sample piece 4 which runs forwards and backwards is spread on the negative conductive rubber plate 2 to be subjected to electric weakness detection. The four vertical sides of the respective positive insert press plate 6 enclose a rectangular cylinder. Insulating bottom plate 1 still is equipped with anodal inserts clamp plate reference column 1.5, and two anodal inserts clamp plate reference columns 1.5's cross section is L shape, and one of them is established and is placed the front end region outside the hole 1.1 left side limit at the conductive rubber board, and another is established and is placed the rear end region outside the hole 1.1 right side limit at the conductive rubber board, and four L profiles of these two anodal inserts clamp plate reference columns 1.5 constitute anodal inserts clamp plate 6's locating surface.
The upper end of the transparent protective cover 11 is a plate surface with the same size as the upper plate surface of the insulating bottom plate 1, and the upper end of the transparent protective cover 11 extends downwards to form a surrounding wall. The left end, the right end and the rear end of the insulating base plate 1 are respectively and fixedly provided with a transparent protective cover connecting bulge 1.6, the side face of each transparent protective cover connecting bulge is parallel to the corresponding rectangular edge of the upper end of the insulating base plate 1, the lower end of the corresponding side wall of each transparent protective cover 11 is fixedly connected with the corresponding side wall of the corresponding transparent protective cover 11 through the elastic fixing of the transparent protective cover 11, and the lower ends of the four side walls of each transparent protective cover 11 are positioned on the upper plate face of the insulating base plate 1. The right end of the front side wall of the transparent protective cover 11 is provided with a negative copper bar passing notch 11.1 for the negative copper bar to pass through, and the middle end of the front side wall of the transparent protective cover 11 is provided with a positive copper bar passing notch 11.2 for the positive copper bar to pass through.
The positive insert pressing plate 6 is a conductive pressing plate, and the lower surface of the rear end of the positive copper bar 7 is fixedly connected with the middle of the front end of the positive insert pressing plate 6 through two bolts, so that the lower surface of the rear end of the positive copper bar 7 is electrically connected with the upper plate surface of the positive insert pressing plate 6. The front end of the positive copper bar 7 extends out of the front end of the positive insert pressing plate 6. The upper end of the positive electrode insert 5 is of a front-back-oriented and inverted convex groove structure, the lower end of the positive electrode insert is formed by downward protrusion of the convex surface of the inverted convex groove structure, the lower end of the corresponding positive electrode insert pressing plate 6 is provided with a front-back-oriented convex groove matched with the inverted convex structure, the upper end of the positive electrode insert 5 is inserted into the convex groove, the positive electrode insert 5 and the positive electrode insert pressing plate 6 can be detachably and electrically connected, and the rear end of the positive electrode copper bar 7 is electrically connected with the positive electrode insert 5 due to the fact that the positive electrode copper bar 7 is electrically connected with the positive electrode insert pressing plate 6; the lower surface of the positive insert 5 is positioned below the lower surface of the positive insert pressing plate 6; during detection, the lower surface of the positive insert 5 is pressed on the middle end of the film sample piece 4 in the front-back direction.
The film sample piece clamping piece group 8 comprises a clamping piece 8.1, a screw rod 8.2, a conical spring 8.3 with a big end arranged at the lower part and a nut 8.4. Every two of the four film sample clamping groups 8 are arranged outside the front end and the rear end of the negative conductive rubber plate 2, the screws 8.2 of the same group of film sample clamping groups 8 are arranged oppositely left and right, and the lower ends of the screws 8.2 penetrate through the stepped counter bores 1.2 on the insulating bottom plate 1 and then are in threaded connection with the nuts 8.4; the spring 8.3 is sleeved on the screw 8.2, and the lower end of the spring 8.3 falls into the stepped counter bore 1.2. Wherein, the clamping piece 8.1 mainly comprises a part connected with the screw 8.2, a part pressed on the film sample 4 and an inclined connecting part connecting the two parts together; the part connected with the screw rod 8.2 is higher than the part of the clamping piece 8.1 pressed on the film sample 4, and the free end part of the clamping piece 8.1 pressed on the film sample 4 is upwarped. The connecting end that links to each other of clamping piece and screw rod is leaned on the lower surface of the head of screw rod by the spring top, is equipped with the anti-rotation structure that prevents the relative screw rod of membrane sample clamping piece and the relative rotation condition of screw rod emergence of membrane sample clamping piece and takes place simultaneously between the connecting end that links to each other of screw rod and membrane sample clamping piece, and this anti-rotation structure does not need to be repeated here because of simple technology. The insulating bottom plate 1 is provided with two scale placing sunken grooves 1.3 in the left-right direction, and the two scale placing sunken grooves 1.3 are respectively positioned outside the front pit edge and the rear pit edge of the conductive rubber plate placing pit 1.1 and are respectively positioned in front of the corresponding two stepped counter bores 1.2; the thickness of the scale 10 is less than or equal to the depth of the scale placing sunken groove 1.3, and the scale 10 is fixed in the scale placing sunken groove 1.3 through bolts and nuts.
The clamping device 9 comprises a pressing strip 9.1, a pressing strip mounting arm 9.2, an operating arm 9.3, a base 9.4, a clamping device rubber pad 9.5 and a pressing strip connecting structure 9.6. The batten connecting structure 9.6 is arranged between the batten 9.1 and the batten mounting arm 9.2. The pressing strip connecting structure 9.6 comprises a middle connecting rod 9.61 and a locking nut 9.62; the upper and lower ends of the middle connecting rod are all provided with fine thread, the middle end of the middle connecting rod 9.61 is provided with a structure for rotating the middle connecting rod (the vertical outer side surface of the position where the structure is located is provided with a certain gap with the side surfaces of the threads at the upper and lower ends of the middle connecting rod), so that a section of hexagonal prism, a section of quadrangular prism or two counter bores which are perpendicular to each other and perpendicular to the axis of the middle connecting rod and used for inserting the rotating rod can be manufactured, and the embodiment is a hexagonal prism structure. The rubber gasket 9.5 of the clamping device is provided with a rectangular long groove which is matched with the pressing strip 9.1 in the front-back direction, the pressing strip 9.1 is arranged in the rectangular long groove and is fixedly connected with the rubber gasket 9.5 of the clamping device together by one or two methods of a plurality of screws, some glue and tight fit to form a combined pressing strip, the rubber gasket 9.5 of the clamping device and the pressing strip 9.1 are fixedly connected together by combining the glue and the tight fit, the lower surface of the rubber gasket 9.5 of the clamping device is positioned below the pressing strip 9.1, and the combined pressing strip formed by fixedly connecting the rubber gasket 9.5 of the clamping device and the pressing strip 9.1 is in the front-back direction and positioned above the positive insert pressing plate (6). The upper end of the middle connecting rod passes through a left-right slotted hole 9.21 arranged on the pressing strip mounting arm 9.2 and then is in threaded connection with a locking nut 9.62, so that the middle connecting rod 9.61 and the pressing strip mounting arm 9.2 are connected together; the lower end of the middle connecting rod is in threaded connection with the middle of the pressing strip 9.1, so that the middle connecting rod 9.61 and the pressing strip 9.1 are connected together; the connection of the pressing strip 9.1 and one end of the pressing strip mounting arm 9.2 is realized by the pressing strip 9.1 and the pressing strip mounting arm 9.2 through the pressing strip connecting structure 9.6. Two sets of clamping devices 9 are oppositely arranged at the left and right sides of the negative conductive rubber plate 2. The base 9.4 is formed by two opposite L-shaped sub-base connecting plates, and the vertical plate surfaces of the two opposite L-shaped sub-base connecting plates are parallel to each other and are perpendicular to the front and back trend. The insulating bottom plate 1 is provided with two convex blocks 1.4 (the convex blocks can be glued with the insulating bottom plate 1, connected by screws or connected with counter bores arranged on the insulating bottom plate 1 in an interference fit manner, and the like, and can also be directly placed on the insulating bottom plate, and the simple technology is not repeated herein, each convex block 1.4 is provided with four through holes, correspondingly, the insulating bottom plate is also provided with four through holes, and each L-shaped sub-base connecting plate is provided with two through holes on the horizontal plate surface, and each L-shaped sub-base connecting plate is connected with the insulating bottom plate by a bolt and a nut which sequentially penetrate through the through holes arranged on the insulating bottom plate, the convex blocks 1.4 and the horizontal plate surface of the L-shaped base connecting plate from bottom to top. One end of the operating arm 9.3 close to the pressing strip 9.1 is composed of two vertical side plates, and the distance between the adjacent plate surfaces of the two vertical side plates is equal to the distance between the adjacent plate surfaces of the vertical plate surfaces of the two opposite L-shaped sub-base connecting plates; the other end of the pressing strip mounting arm 9.2 is L-shaped and is inserted between the vertical plate surfaces of the two corresponding L-shaped sub-base connecting plates and between the two vertical side plates of one end, close to the pressing strip 9.1, of the operating arm 9.3, the upper end of the other end of the pressing strip mounting arm 9.2 is hinged with one end of the operating arm 9.3, the lower end of the other end of the pressing strip mounting arm 9.2 is hinged with the L-shaped sub-base connecting plates, the hinged shafts are arranged horizontally, and a specific hinged structure is a known technology and is not described herein. The middle end of the operating arm 9.3 is provided with a bulge which protrudes downwards into the gap between the side walls of the two L-shaped base connecting plates, and the middle end of the operating arm 9.3 is hinged with the side walls of the two L-shaped base connecting plates by the bulge through a horizontally arranged hinge shaft, so that the middle end of the operating arm 9.3 is hinged with the base 9.4.
During detection, the lower surface of the positive insert and the lower surface of the corresponding end part of the clamping piece are pressed on the upper surface of the corresponding part of the film sample piece.
The above embodiments are merely preferred embodiments of the present invention, and not intended to limit the structure and scope of the invention. Indeed, many equivalent variations in the shapes, constructions and design objectives of the devices according to the present invention are possible. Therefore, all equivalent changes in the shapes, structures and design objectives of the present invention are intended to be covered by the present invention, and all such equivalent changes are intended to be protected by the present invention.
Claims (4)
1. A film electric weakness detector is characterized in that: the film sample piece clamping device comprises an insulating bottom plate (1), a negative conductive rubber plate (2), a negative copper bar (3), a positive insert (5), a positive insert pressing plate (6), a positive copper bar (7), a film sample piece clamping group (8) and a clamping device (9);
a conductive rubber plate placing pit (1.1) with the depth smaller than the thickness of the negative conductive rubber plate is arranged on the insulating bottom plate, and the rear end of the negative copper bar is fixedly connected with the right front corner of the negative conductive rubber plate; the middle end of the film sample piece in the front-back direction is spread on the negative conductive rubber plate to receive the electric weakness detection of the negative conductive rubber plate;
the positive insert is detachably connected with the positive insert pressing plate, and the lower surface of the positive insert pressing plate is positioned below the lower surface of the positive insert pressing plate; the rear end of the positive copper bar is fixedly connected with the middle or the left side of the front end of the positive insert pressing plate, the front end of the positive copper bar extends out of the front end of the positive insert pressing plate, and the rear end of the positive copper bar is electrically connected with the positive insert; during detection, the lower surface of the positive insert is pressed on the middle end of the film sample piece in the front-back direction;
the film sample piece clamping piece group comprises a clamping piece (8.1), a screw rod (8.2), a spring (8.3) and a nut (8.4); the four film sample clamping pieces are respectively arranged outside the front end and the rear end of the negative conductive rubber plate in pairs, the screws of the same film sample clamping piece group are arranged in a left-right opposite mode, and the lower ends of the screws penetrate through stepped counter bores (1.2) in the insulating bottom plate and are connected with the fine threads of the nuts; the spring is sleeved on the screw rod, and the lower end of the spring falls into a large hole at the upper end of the stepped counter bore;
the clamping device comprises a pressing strip (9.1), a pressing strip mounting arm (9.2), an operating arm (9.3) and a base (9.4); the number of the clamping devices is two; the two bases are arranged outside the left edge and the right edge of the negative conductive rubber plate in a left-right opposite mode; the two pressing strips are in the front-back direction, are positioned above the positive insert pressing plate and are connected with one end of the pressing strip mounting arm; the other end of the layering mounting arm is hinged with the operation arm and the base at the same time, and the middle end of the operation arm is hinged with the base;
wherein:
the insulating bottom plate (1) is provided with a positive insert pressing plate positioning column (1.5);
a pressing strip connecting structure (9.6) is arranged between the pressing strip (9.1) and the pressing strip mounting arm (9.2), and the pressing strip connecting structure (9.6) comprises an intermediate connecting rod (9.61) and a locking nut (9.62); the upper end and the lower end of the middle connecting rod are both provided with fine threads, the middle end of the middle connecting rod (9.61) is provided with a structure for rotating the middle connecting rod, and the upper end of the middle connecting rod passes through a left-right slotted hole (9.21) arranged on the layering mounting arm (9.2) and is in threaded connection with a locking nut (9.62), so that the middle connecting rod (9.61) and the layering mounting arm (9.2) are connected together; the lower end of the middle connecting rod is in threaded connection with the middle part of the pressing strip (9.1), so that the middle connecting rod (9.61) is connected with the pressing strip (9.1); the connection of one end of the pressing strip (9.1) and one end of the pressing strip mounting arm (9.2) is realized through the pressing strip connecting structure (9.6) by the pressing strip (9.1) and the pressing strip mounting arm (9.2);
the base (9.4) is composed of two opposite L-shaped sub-base connecting plates, and vertical plate surfaces of the two opposite L-shaped sub-base connecting plates are parallel to each other and are perpendicular to the front and back trend; the insulation base plate (1) is provided with two convex blocks (1.4) used for being connected with a base (9.4), each convex block (1.4) is provided with four through holes, correspondingly, the insulation base plate is also provided with four through holes, the horizontal plate surface of each L-shaped sub-base connecting plate is provided with two through holes, each L-shaped sub-base connecting plate is connected together by a bolt and a nut which sequentially penetrate through the through holes arranged on the insulation base plate, arranged on the convex blocks (1.4) and arranged on the horizontal plate surface of the L-shaped base connecting plate from bottom to top so as to fixedly connect the L-shaped base connecting plate and the insulation base plate together; one end of the operating arm (9.3) close to the pressing strip (9.1) is composed of two vertical side plates, and the distance between the adjacent plate surfaces of the two vertical side plates is equal to the distance between the adjacent plate surfaces of the vertical plate surfaces of the two opposite L-shaped base connecting plates; the other end of the pressing strip mounting arm (9.2) is L-shaped and is inserted between the vertical plate surfaces of the two corresponding L-shaped base connecting plates and between the two vertical side plates of one end, close to the pressing strip (9.1), of the operating arm (9.3), the upper end of the other end of the pressing strip mounting arm (9.2) is hinged with one end of the operating arm (9.3), the lower end of the other end of the pressing strip mounting arm (9.2) is hinged with the L-shaped base connecting plates, and the hinged shafts are all horizontally arranged; the middle end of the operating arm (9.3) is provided with a bulge which is downwards protruded into a gap between the side walls of the two L-shaped base connecting plates, and the middle end of the operating arm (9.3) is hinged with the side walls of the two L-shaped base connecting plates by the bulge through a horizontally arranged hinge shaft so as to realize that the middle end of the operating arm (9.3) is hinged with the base (9.4);
during detection, the lower surface of the positive insert and the lower surface of the corresponding end part of the clamping piece are pressed on the upper surface of the corresponding part of the film sample piece.
2. The film electrical weakness detector of claim 1, wherein: also comprises two rulers (10); two scale placing sinking grooves (1.3) which run left and right are arranged on the insulating bottom plate (1); the two scale placing sunken grooves (1.3) are respectively positioned outside the front pit edge and the rear pit edge of the conductive rubber plate placing pit (1.1) and are respectively positioned in front of the corresponding two stepped counter bores (1.2); the thickness of the scale (10) is less than or equal to the depth of the scale placing sunken groove (1.3).
3. The film electrical weakness detector of claim 1, wherein: the device also comprises a transparent protective cover (11), wherein the front end of the transparent protective cover (11) is provided with a negative copper bar passing notch (11.1) and a positive copper bar passing notch (11.2); the lower edge of the side wall of the transparent protective cover (11) is fixedly connected with the periphery of the insulating bottom plate (1).
4. The film electrical weakness detector of claim 1, wherein: the positive insert pressing plate (6) is a conductive pressing plate, the rear end of the positive copper bar (7) is fixedly connected with the positive insert pressing plate (6), and the lower surface of the rear end of the positive copper bar (7) is electrically connected with the upper plate surface of the positive insert pressing plate (6); the clamping device rubber gasket (9.5) is fixedly connected with the pressing strip (9.1) to form a combined pressing strip, and the lower surface of the clamping device rubber gasket (9.5) is located below the pressing strip (9.1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910637563.4A CN110456235B (en) | 2019-07-15 | 2019-07-15 | Film electric weak point detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910637563.4A CN110456235B (en) | 2019-07-15 | 2019-07-15 | Film electric weak point detector |
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| CN110456235A CN110456235A (en) | 2019-11-15 |
| CN110456235B true CN110456235B (en) | 2021-11-26 |
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| US6369592B1 (en) * | 1999-05-24 | 2002-04-09 | International Business Machines Corporation | Probe for testing and repairing printed circuit features |
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