CN115060426A - IGBT sealing performance detection device and detection method - Google Patents
IGBT sealing performance detection device and detection method Download PDFInfo
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- CN115060426A CN115060426A CN202210977650.6A CN202210977650A CN115060426A CN 115060426 A CN115060426 A CN 115060426A CN 202210977650 A CN202210977650 A CN 202210977650A CN 115060426 A CN115060426 A CN 115060426A
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- upper frame
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
Abstract
The invention belongs to the technical field of IGBT detection, and particularly discloses a device and a method for detecting the sealing property of an IGBT. The tightness detection device comprises a sealing frame and a detector, wherein the detector is correspondingly communicated with the sealing frame by a through pipe. The invention utilizes simple electric energy to facilitate the circulating air pump to pump inert gas through the through pipe, the inert gas between the upper frame and the lower frame is LED to the outer through groove through the inner through groove, the outer through groove is LED to the through pipe, the circulating air pump leads the pumped inert gas into the detector, the inert gas detected by the detector is LED to the space between the upper frame and the lower frame through the through pipe and the outer through groove, the process is repeated, the gas components in the upper frame and the lower frame are observed through the LED display screen on the detector, when the gas components contain oxygen, the gas leakage of the detection piece is indicated, and when the gas components do not contain oxygen, the sealing performance of the detection piece is indicated to be good.
Description
Technical Field
The invention belongs to the technical field of IGBT (insulated gate bipolar translator) sealing performance detection, and particularly relates to a device and a method for detecting the sealing performance of an IGBT.
Background
An insulated Gate Bipolar Transistor (igbt) is a composite fully-controlled voltage-driven power Semiconductor device composed of a Bipolar Junction Transistor (BJT) and an insulated Gate field effect Transistor (MOS). Present common welded type IGBT module realizes IGBT's insulating, dampproofing and cushioning effect through embedment silica gel, because high-pressure IGBT module application environment is more complicated, often can lead to the moisture to get into because surrounding environment humidity is big, leads to the module to become invalid, and then leads to the IGBT device to scrap. The existing method for detecting the sealing performance of the IGBT is to encapsulate silica gel and then observe whether glue leakage occurs or not through naked eyes, and the detection method needs to consume a large amount of detection time and needs to consume excessive silica gel to seal the IGBT, so that resource waste is caused.
Disclosure of Invention
In order to solve the above problems, the present invention provides a device and a method for detecting the sealing performance of an IGBT.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a leakproofness detection device of IGBT, includes seal frame and detector, the detector utilizes the siphunculus to correspond the intercommunication with seal frame, the siphunculus is connected with circulating air pump, and the circulating air pump output corresponds the intercommunication with the detector, the detector includes chip IC and power VCC, the power VCC passes through LED display screen and connects chip IC, the power VCC passes through gas sensing element MQK-2 and resistance R1 ground connection, and the power VCC passes through gas sensing element MQK-2 and resistance R2 and connects triode VT's base level, triode VT's projecting pole ground connection, triode VT collecting electrode meets chip IC, chip IC is connected with resistance R3, parallelly connected slide rheostat RP and diode VD in resistance R1 both ends, and resistance R1 both ends still parallelly connected have electric capacity C1, resistance R1 both ends parallel resistance R2 and electric capacity C2.
Further, the seal frame includes upper bracket and lower carriage, the lower carriage bottom is provided with the bottom plate, the montant of the vertical setting of the equal fixedly connected with in four corners of upper bracket bottom, and montant bottom and bottom plate top surface fixed connection, it is a plurality of the montant runs through four corners of lower carriage respectively, be provided with a plurality of springs between upper bracket and the lower carriage, a plurality of springs and a plurality of montant one-to-one, and the spring cup joints on the montant surface.
Further, four corner bottoms of undercarriage all are provided with the ring gear, the ring gear spiral cover connects in the montant surface, and the ring gear top surface corresponds the laminating with the undercarriage bottom surface, and is a plurality of the ring gear utilizes annular rack swing joint, and the tooth of ring gear circumference lateral surface meshes with the tooth of annular rack medial surface, annular rack is made by rubber materials, the bottom plate top surface is provided with the driving gear, driving gear and annular rack meshing, and the driving gear top is connected with motor output end, and the motor is installed in the undercarriage bottom surface.
Further, the center of the top surface of the lower frame is provided with a placing table, the peripheral outer side surfaces of the placing table are provided with inclined planes, the whole appearance of the placing table is set to be a boss, the inclined planes are inclined planes of the boss, the length and the width of the placing table top surface are smaller than those of the bottom surface of the placing table, the inner side of the upper frame is provided with a corresponding groove, the placing table is matched with the corresponding groove in a corresponding mode, the peripheral inner side walls of the corresponding groove are inclined, the peripheral inner side walls of the corresponding groove are matched with the four inclined planes of the placing table in a corresponding mode, the bottom surface of the upper frame is provided with an annular rubber strip, the annular rubber strip surrounds the bottom opening of the corresponding groove, and the upper frame utilizes the rubber strip to be matched with the lower frame in a corresponding mode.
Further, the lower frame both sides all are provided with the fly leaf that corresponds the parallel with the inclined plane, the fly leaf is in places the platform outside, and the distance between two fly leaf topside is less than the distance between the two bottoms, and the thickness on fly leaf topside is less than the thickness on fly leaf base, the topside of fly leaf corresponds the cooperation with the inside wall that corresponds the groove, it is provided with the mounting groove to place the platform inboard, and inside being provided with of mounting groove corresponds the complex inner splint with the fly leaf, and corresponds through the connecting rod between fly leaf and the inner splint and be connected, the connecting rod runs through places the platform side, the top surface of inner splint is provided with first tangent plane, and the relative setting of first tangent plane of two inner splint.
Furthermore, the corresponding inslot portion of putting on the shelf is provided with two first limiting plates relatively, the bottom surface of first limiting plate is provided with the second tangent plane, the second tangent plane of first limiting plate sets up with adjacent corresponding inslot lateral wall relatively, and the second tangent plane of first limiting plate bottom surface corresponds the cooperation with the first tangent plane of interior splint top surface, after the upper bracket lid was put down the top, the second tangent plane of first limiting plate and the first tangent plane laminating of interior splint, two first limiting plate medial surface all utilizes the soft clamp splice of branch fixedly connected with, and branch runs through second limiting plate center department, second limiting plate top surface and corresponding inslot side bottom surface fixed connection.
Further, two the inner splint medial surface all is provided with the spout, and inner splint both ends face corresponds the laminating with the front and back both sides wall of mounting groove respectively, the mounting groove inside of placing the platform is provided with the balladeur train, balladeur train center department runs through and is provided with the slider, the balladeur train utilizes slider and spout sliding fit, the top surface and the bottom surface of spout all slope the setting, and the inboard open-ended width of spout is less than the width of the inboard side of spout.
Furthermore, a detection piece is correspondingly placed at the center of the placement groove, the detection piece is positioned between two inner clamping plates, fastening devices are arranged on the front end face and the rear end face of the detection piece, each fastening device comprises a support, each support comprises two side rods and a middle rod, each middle rod is positioned between the two side rods, the two side rods of each support are respectively arranged corresponding to the two opposite carriages, the side rods of each support are rotatably connected with the carriages through rotating plates, a first rotating sheet and a second rotating sheet are sleeved on the surface of each middle rod, the first rotating sheet and the second rotating sheet are sleeved on the surface of each middle rod in a staggered mode, the inner side ends of the first rotating sheet and the second rotating sheet correspond to the end faces of the detection piece, rubber frames are arranged at the inner side ends of the first rotating sheet and the second rotating sheet, the first rotating sheet and the second rotating sheet on the two sides correspondingly clamp the detection piece through the rubber frames, the outer side ends of the first rotating sheet and the second rotating sheet are fixedly connected with the inner side ends of the two sliding blocks through pulling strips, and the two opposite braces are arranged in a staggered manner.
Furthermore, the centers of the front side and the rear side of the lower frame are provided with inner through grooves in a penetrating mode, the centers of the front side and the rear side of the upper frame are provided with outer through grooves in a penetrating mode, and the two ends of the through pipe are communicated with the corresponding grooves in a corresponding mode through the outer through grooves.
The invention also provides a method for detecting the sealing performance of the IGBT, which applies any one of the devices for detecting the sealing performance of the IGBT and comprises the following steps:
step S1, introducing proper oxygen into the cavity inside the detection piece, placing the detection piece inside the placing groove of the placing table, then placing the detection piece between the two inner clamping plates, pushing the bracket to move, then enabling the rubber frames at the inner side ends of the first rotor plate and the second rotor plate to correspond to the detection piece, and limiting the detection piece by the two fastening devices through the rubber frames;
step S2, when the bracket moves, the bracket pulls the inner side end of the rotating plate to move by using the side lever, the rotating plate further pulls the sliding frame to move under the pulling force of the side lever, and the sliding frame slides inside the sliding groove of the inner clamping plate by using the outer side end of the sliding block until the rubber frame contacts with the end face of the detection piece;
step S3, starting a motor, wherein the motor works to drive a driving gear to rotate, the driving gear rotates to drive a gear ring to rotate on the surface of a vertical rod by utilizing an annular rack, the gear ring moves upwards on the surface of the vertical rod due to the spiral effect of the gear ring and the vertical rod, a plurality of gear rings move upwards to push a lower frame to move upwards synchronously, and the lower frame is matched with an upper frame to extrude a spring when sliding on the surface of the vertical rod;
s4, after the top surface of the placing table corresponds to the bottom opening of the corresponding groove, the top side edges of the two movable plates can correspond to the inner side of the corresponding groove, when the inclined surfaces around the placing table gradually enter the corresponding groove, the inner side walls on the two sides of the corresponding groove can extrude the movable plates, the movable plates gradually adhere to the inclined surfaces under extrusion, the movable plates push the inner clamping plates to gradually approach the detection piece by using the connecting rods, the two inner clamping plates clamp the detection piece by using the two fastening devices, the stability of the detection piece in the placing groove is ensured until the placing table is completely buckled with the corresponding groove, the upper frame is correspondingly adhered to the lower frame by using the rubber strips, so that a gap between the upper frame and the lower frame is sealed, and the sealing property between the upper frame and the lower frame is ensured;
step S5, opening a through hole on the through pipe, extracting air between the upper frame and the lower frame by using the through hole, extracting air inside the upper frame and the lower frame and air inside the through pipe through the through hole, introducing inert gas into the through pipe and between the upper frame and the lower frame by using the through hole, filling the inert gas into the whole sealing device, and then plugging the through hole;
s6, starting the circulating air pump, pumping the inert gas by the circulating air pump through the through pipe, leading the inert gas between the upper rack and the lower rack to the outer through groove through the inner through groove, leading the inert gas to the inside of the through pipe by using the outer through groove, leading the pumped inert gas to the inside of the detector by the circulating air pump, leading the inert gas detected by the detector to the space between the upper rack and the lower rack by using the through pipe and the outer through groove, repeating the process of the inert gas flowing in the detector and the sealing rack in the step S6, observing the gas components in the upper rack and the lower rack through the LED display screen on the detector, indicating that the detecting part leaks gas when the gas components contain oxygen, indicating that the detecting part has good sealing performance when the gas components do not contain oxygen.
The invention has the technical effects and advantages that:
1. the invention utilizes simple electric energy to facilitate the circulating air pump to pump inert gas through the through pipe, the inert gas between the upper frame and the lower frame is LED to the outer through groove through the inner through groove, the outer through groove is LED into the through pipe, the circulating air pump leads the pumped inert gas into the detector, the inert gas detected by the detector is LED between the upper frame and the lower frame through the through pipe and the outer through groove, the process is repeated, the gas components in the upper frame and the lower frame are observed through the LED display screen on the detector, when the gas components contain oxygen, the gas leakage of the detection piece is indicated, when the gas components do not contain oxygen, the tightness of the detection piece is indicated to be good, the detection time can be greatly reduced, and meanwhile, the silicon gel is not needed to seal the detection piece, thereby reducing the waste of resources.
2. In the process of forming the sealing frame by the upper frame and the lower frame, when the placing table and the corresponding groove are matched to limit the movable plate, the position of the inner clamping plate is limited, when the second tangent plane is in contact with the first tangent plane, the second tangent plane slides on the first tangent plane surface, the second tangent plane pushes the clamping blocks to move by using the first limiting plate, the two clamping blocks gradually approach each other in the pushing process of the first limiting plate, and the two clamping blocks are gradually clamped on the two side edges of the top of the detection piece, so that the top of the detection piece is conveniently limited, the whole detection piece is prevented from randomly shaking in the sealing frame with flowing air, and the stability of the detection piece in the sealing frame is ensured.
3. When the two inner clamping plates are gradually close to each other, the inner clamping plates push the outer side ends of the rotating plates to move, the rotating plates are pushed by the inner clamping plates to rotate, the two supports are matched with the rotating plates to extrude the front end surface and the rear end surface of a detection piece, the reaction force of the front end surface and the rear end surface of the detection piece to the rubber frame enables the inner side ends of the first rotating piece and the second rotating piece to be separated from each other, the first rotating piece and the second rotating piece rotate on the surface of the middle rod, the outer side ends of the first rotating piece and the second rotating piece pull the pull strip in the separation process, the pull strip pulls the inner side end of the sliding block, and the sliding block moves in the sliding frame, the outer side end of the sliding block is gradually attached to the top surface and the bottom surface of the sliding groove in the moving process, the limiting effect between the sliding frame and the inner clamping plate is guaranteed by the aid of friction between the outer side end of the sliding block and the sliding groove, and stability of the detection piece in the placement groove is further guaranteed by the aid of the rotating plates; when the rotating plate rotates, the rubber frame and the detection piece are clamped correspondingly, the rotating plate rotates to enable the outer side of the sliding block to slide inside the sliding groove, the sliding blocks on the two sides of the sliding groove are gradually kept away from the sliding process, and when the detection piece is stable, clamping damage of the detection piece caused by clamping force of the fastening device is avoided.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 shows a sealing detection circuit diagram of an IGBT according to an embodiment of the present invention;
fig. 2 is a schematic view showing the overall structure of the device for detecting the sealing property of the IGBT according to the embodiment of the present invention;
FIG. 3 is a schematic view of the bottom structure of the upper frame of the embodiment of the invention;
FIG. 4 is a schematic view of the lower shelf top structure of an embodiment of the present invention;
FIG. 5 shows an enlarged view of the portion A of FIG. 4 in accordance with an embodiment of the present invention;
FIG. 6 is an enlarged view of the portion B of FIG. 4 according to an embodiment of the present invention;
in the figure: 1. a detector; 2. pipe passing; 3. a circulating air pump; 4. putting on a shelf; 5. putting down a rack; 6. a base plate; 7. a vertical rod; 8. a spring; 9. a toothed ring; 10. an annular rack; 11. a driving gear; 12. a placing table; 13. a bevel; 14. a corresponding groove; 15. a rubber strip; 16. a movable plate; 17. an inner splint; 18. a connecting rod; 19. a first limiting plate; 20. a clamping block; 21. a second limiting plate; 22. a chute; 23. a carriage; 24. a slider; 25. a detection member; 26. a support; 27. a side lever; 28. an intermediate lever; 29. rotating the plate; 30. a first rotor; 31. a second rotor; 32. a rubber frame; 33. bracing; 34. an inner through groove; 35. an outer through groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a device for detecting the sealing performance of an IGBT (insulated gate bipolar transistor), which comprises a sealing frame and a detector 1, the detector 1 is correspondingly communicated with the sealing frame by a through pipe 2, the through pipe 2 is connected with a circulating air pump 3, and the output end of the circulating air pump 3 is correspondingly communicated with the detector 1, the detector 1 comprises a chip IC and a power supply VCC, the power supply VCC is connected with the chip IC through the LED display screen, the power supply VCC is grounded through the gas sensor MQK-2 and the resistor R1, the power supply VCC is connected with the base level of the triode VT through the gas sensor MQK-2 and the resistor R2, the emitter of the triode VT is grounded, the collector of the triode VT is connected with the chip IC, the chip IC is connected with a resistor R3, the two ends of the resistor R1 are connected with a slide rheostat RP and a diode VD in parallel, and a capacitor C1 is connected in parallel with two ends of the resistor R1, and a resistor R2 and a capacitor C2 are connected in parallel with two ends of the resistor R1. The gas in the sealing frame is extracted by the circulating air pump 3 through the through pipe 2, the extracted gas is introduced into the detector 1, the gas sensitive element MQK-2 can detect gas components in the gas, the gas sensitive element MQK-2 transmits the detected gas components to the chip IC, the detected gas components are disclosed by the LED display screen connected with the chip IC, the gas components in the sealing frame can be observed by the LED display screen conveniently, and therefore the sealing performance of the detector 25 is judged. The gas sensor MQK-2 is a gas sensor, the gas sensor is electrically connected to the chip IC, the chip IC performs control operation by signals transmitted by the gas sensor, and the principle of the automatic control technology in the prior art is the same, and the setting mode is a technology known to those skilled in the art.
In fig. 2-4, the seal frame includes upper bracket 4 and lower bracket 5, lower bracket 5 bottom is provided with bottom plate 6, the equal fixedly connected with montant 7 of the vertical setting of four corners in upper bracket 4 bottom surface, and 7 bottom of montant and 6 top surface fixed connection of bottom plate, it is a plurality of montant 7 runs through four corners of lower bracket 5 respectively, be provided with a plurality of springs 8 between upper bracket 4 and the lower bracket 5, a plurality of springs 8 and a plurality of montant 7 one-to-one, and spring 8 cup joints in montant 7 surface. When putting on the shelf 4 and the undercarriage 5 are close to each other, thereby put on the shelf 4 and the undercarriage 5 cooperation is extruded the spring 8 on montant 7 surface, merges into sealed frame completely up to putting on the shelf 4 and undercarriage 5, makes things convenient for circulating gas pump 3 to utilize siphunculus 2 to extract the inside gas of sealed frame, utilizes detector 1 to detect the gas of extraction. When putting on shelf 4 and undercarriage 5 separate gradually, spring 8's elasticity and undercarriage 5's gravity make undercarriage 5 move down on montant 7 surface, be in bottom plate 6 top surface again until undercarriage 5, conveniently take out detection piece 25 from undercarriage 5 is inside, put into undercarriage 5 inside with new detection piece 25, conveniently utilize detector 1 to detect new detection piece 25, can be quick detect detection piece 25, thereby judge whether detection piece 25 is the wastrel.
In fig. 2, four corners bottoms of lower carriage 5 all are provided with ring gear 9, ring gear 9 spiral cover is in montant 7 surfaces, and the laminating is corresponded with lower carriage 5 bottom surfaces to the top surface of ring gear 9, and is a plurality of ring gear 9 utilizes annular rack 10 swing joint, and the tooth meshing of the tooth of 9 circumference lateral surfaces of ring gear and the tooth of annular rack 10 medial surface, annular rack 10 is made by rubber materials, 6 top surfaces of bottom plate are provided with driving gear 11, driving gear 11 and the meshing of annular rack 10, and the driving gear 11 top is connected with the motor output, and the motor is installed in lower carriage 5 bottom surfaces. When the motor is started, the motor works to drive the driving gear 11 to rotate, the driving gear 11 rotates to drive the toothed ring 9 to rotate on the surface of the vertical rod 7 by utilizing the annular rack 10, the toothed ring 9 moves upwards on the surface of the vertical rod 7 due to the spiral effect of the toothed ring 9 and the vertical rod 7, the plurality of toothed rings 9 move upwards to push the lower frame 5 to move upwards synchronously, the lower frame 5 is matched with the upper frame 4 when sliding on the surface of the vertical rod 7 to extrude the spring 8, when the lower frame 5 moves upwards, the lower frame 5 drives the motor to move upwards synchronously, at the moment, the motor can continuously provide kinetic energy for the driving gear 11, the driving gear 11 can conveniently provide power for the lower frame 5 to move upwards by utilizing the annular rack 10, until the lower frame 5 and the upper frame 4 are combined to form a sealed frame, the motor stops working, the output end of the motor utilizes the driving gear 11 to limit the annular rack 10, so that the annular rack 10 is utilized to avoid the rotation of the toothed ring 9, the integrity of the combination of the upper and lower shelves 4 and 5 is ensured.
In fig. 2-4, a placing table 12 is arranged at the center of the top surface of the lower frame 5, inclined planes 13 are arranged on the peripheral outer side surfaces of the placing table 12, the overall appearance of the placing table 12 is set as a boss, the inclined planes 13 are inclined planes of the boss, the length and the width of the top surface of the placing table 12 are smaller than those of the bottom surface of the placing table 12, corresponding grooves 14 are formed in the inner side of the upper frame 4, the placing table 12 is correspondingly matched with the corresponding grooves 14, the peripheral inner side walls of the corresponding grooves 14 are all obliquely arranged, the peripheral inner side walls of the corresponding grooves 14 are correspondingly matched with the four inclined planes 13 of the placing table 12, annular rubber strips 15 are arranged on the bottom surface of the upper frame 4, the annular rubber strips 15 surround the bottom openings of the corresponding grooves 14, and the upper frame 4 is correspondingly matched with the lower frame 5 by using the rubber strips 15. When the lower frame 5 is close to the upper frame 4 gradually, the placing table 12 on the top surface of the lower frame 5 gradually enters the corresponding groove 14 of the upper frame 4 at the moment, the inclined surface 13 of the placing table 12 corresponds to the inner side wall of the corresponding groove 14, and the top surface of the upper frame 4 is attached to the bottom surface of the upper frame 5 until the bottom surface of the lower frame 5 is attached to the bottom surface of the upper frame 4, the rubber strip 15 on the bottom surface of the upper frame 4 can be closely attached to the top surface of the lower frame 5 under extrusion deformation at the moment, the sealing performance between the upper frame 4 and the lower frame 5 can be guaranteed by the aid of the deformed rubber strip 15, and the situation that air leakage occurs at the joint between the upper frame 4 and the lower frame 5 is avoided.
In fig. 2 and 4, the two sides of the lower frame 5 are provided with movable plates 16 corresponding to the inclined planes 13, the movable plates 16 are located outside the placing table 12, the distance between the top edges of the two movable plates 16 is smaller than the distance between the bottoms of the two movable plates, the thickness of the top edge of the movable plate 16 is smaller than the thickness of the bottom edge of the movable plate 16, the top edge of the movable plate 16 is correspondingly matched with the inner side wall of the corresponding groove 14, the inner side of the placing table 12 is provided with a mounting groove, an inner clamping plate 17 corresponding to the movable plate 16 is arranged in the mounting groove, the movable plate 16 and the inner clamping plate 17 are correspondingly connected through a connecting rod 18, the connecting rod 18 penetrates through the side edge of the placing table 12, the top surface of the inner clamping plate 17 is provided with a first tangent plane, and the first tangent planes of the two inner clamping plates 17 are oppositely arranged. After the top surface of the placing table 12 corresponds to the bottom opening of the corresponding groove 14, the top side edges of the two movable plates 16 can correspond to the inner side of the corresponding groove 14, when the peripheral inclined surfaces 13 of the placing table 12 gradually enter the corresponding groove 14, the inner side walls of the two sides of the corresponding groove 14 can extrude the movable plates 16, the movable plates 16 are gradually attached to the inclined surfaces 13 under extrusion, and the movable plates 16 push the inner clamping plates 17 to gradually approach the detection piece 25 by using the connecting rods 18.
Can correspond the centre gripping according to between the inclined plane 13 of placing platform 12 and the corresponding groove 14 inside wall to inject fly leaf 16, can guarantee the limited distance between two interior splint 17, thereby can the certain size of centre gripping detection piece 25, improve the suitability of whole sealing device to different detection pieces 25.
In fig. 3 and 4, two first limiting plates 19 are oppositely disposed inside the corresponding grooves 14 of the upper frame 4, the bottom surfaces of the first limiting plates 19 are provided with second cut surfaces, the second cut surfaces of the first limiting plates 19 are oppositely disposed with the inner side walls of the adjacent corresponding grooves 14, the second cut surfaces of the bottom surfaces of the first limiting plates 19 are correspondingly matched with the first cut surfaces of the top surfaces of the inner clamping plates 17, when the upper frame 4 is covered on the top of the lower frame 5, the second cut surfaces of the first limiting plates 19 are attached to the first cut surfaces of the inner clamping plates 17, the inner side surfaces of the two first limiting plates 19 are fixedly connected with flexible clamping blocks 20 through supporting rods, the supporting rods penetrate through the centers of the second limiting plates 21, and the top surfaces of the second limiting plates 21 are fixedly connected with the bottom surfaces of the inner sides of the corresponding grooves 14. In the process that the upper frame 4 and the lower frame 5 form the seal frame, after the placing table 12 and the corresponding groove 14 are matched to limit the movable plate 16, the position of the inner clamping plate 17 is limited, in the process that the second tangent plane is in contact with the first tangent plane, the second tangent plane slides on the first tangent plane surface, the second tangent plane utilizes the first limiting plate 19 to push the clamping blocks 20 to move, the two clamping blocks 20 gradually approach in the process that the first limiting plate 19 pushes, the two clamping blocks 20 are gradually clamped on two side edges of the top of the detection piece 25, the top of the detection piece 25 is conveniently limited, the whole detection piece 25 is prevented from arbitrarily shaking in the seal frame with air flowing, and the stability of the detection piece 25 in the seal frame is ensured.
In fig. 4 and 5, two inner side surfaces of the inner boards 17 are provided with sliding grooves 22, two end surfaces of the inner boards 17 are respectively attached to the front side wall and the rear side wall of the mounting groove, a sliding frame 23 is arranged in the mounting groove of the placing table 12, a sliding block 24 is arranged at the center of the sliding frame 23 in a penetrating manner, the sliding frame 23 is in sliding fit with the sliding grooves 22 through the sliding block 24, the top surface and the bottom surface of the sliding grooves 22 are all arranged in an inclined manner, and the width of the inner side opening of the sliding groove 22 is smaller than the width of the inner side edge of the sliding groove 22. When the outer end of the sliding block 24 slides in the sliding groove 22, the sliding block 23 prevents the inner end of the sliding block 24 from moving out of the sliding groove 22 during the sliding process in the sliding groove 22 due to the limitation of the top surface and the bottom surface of the sliding groove 22 to the outer end of the sliding block 24.
In fig. 4 and 6, a detecting member 25 is correspondingly placed at the center of the placement groove, the detecting member 25 is located between two inner clamping plates 17, fastening devices are respectively arranged on the front and back end faces of the detecting member 25, each fastening device comprises a bracket 26, each bracket 26 comprises two side rods 27 and a middle rod 28, each middle rod 28 is located between the two side rods 27, the two side rods 27 of each bracket 26 are respectively arranged corresponding to the two opposite carriages 23, the side rods 27 of each bracket 26 are rotatably connected with the carriages 23 by using rotating plates 29, a first rotating sheet 30 and a second rotating sheet 31 are sleeved on the surface of each middle rod 28, the first rotating sheet 30 and the second rotating sheet 31 are sleeved on the surface of each middle rod 28 in a staggered manner, the inner side ends of the first rotating sheet 30 and the second rotating sheet 31 correspond to the end faces of the detecting member 25, rubber frames 32 are arranged on the inner side ends of the first rotating sheet 30 and the second rotating sheet 31 on both sides, and the first rotating sheet 30 and the second rotating sheet 31 on both sides correspond to the detecting member 25 by using the rubber frames 32, the outer ends of the first rotating sheet 30 and the second rotating sheet 31 are fixedly connected with the inner ends of the two sliding blocks 24 by using pull bars 33, and the two opposite pull bars 33 are arranged in a staggered manner. When the two inner clamping plates 17 approach each other gradually, the inner clamping plates 17 push the outer ends of the rotating plates 29 to move, the rotating plates 29 rotate under the pushing of the inner clamping plates 17, the two brackets 26 press the front and rear end faces of the detection piece 25 under the cooperation of the rotating plates 29, the reaction force of the front and rear ends of the detection piece 25 to the rubber frame 32 causes the inner ends of the first rotating piece 30 and the second rotating piece 31 to separate from each other, the first rotating piece 30 and the second rotating piece 31 rotate on the surface of the middle rod 28, the outer ends of the first rotating piece 30 and the second rotating piece 31 pull the pull strip 33 in the separation process, the pull strip 33 pulls the inner end of the sliding block 24, and the sliding block 24 moves in the sliding frame 23, and the outside end of the sliding block 24 is gradually attached to the top surface and the bottom surface of the sliding groove 22 in the moving process, the limiting effect between the sliding frame 23 and the inner clamping plate 17 is ensured by the friction force between the outside end of the sliding block 24 and the sliding groove 22, and the stability of the detection piece 25 in the placing groove is ensured by the rotating plates 29. Wherein, the detection piece 25 sets up to the IGBT, need inject oxygen to the IGBT is inside, is injecing the detection piece 25 inside the seal carrier, thereby judges whether detection piece 25 is in encapsulated situation through detecting the inside gas composition of seal carrier.
When changeing board 29 and rotating, because the corresponding centre gripping of rubber frame 32 and test piece 25, changeing board 29 this moment and rotating and making the slider 24 outside slide in spout 22 inside, and the slider 24 of spout 22 both sides is kept away from at the slip in-process gradually, when guaranteeing that test piece 25 is stable, avoids fastener's centre gripping dynamics to lead to test piece 25 to appear the centre gripping damage.
In fig. 3 and 4, the centers of the front and rear sides of the lower frame 5 are provided with inner through grooves 34, the centers of the front and rear sides of the upper frame 4 are provided with outer through grooves 35, and the two ends of the through pipe 2 are communicated with the corresponding grooves 14 by the outer through grooves 35. Start circulating air pump 3, circulating air pump 3 extracts inert gas through siphunculus 2, inert gas between put on the shelf 4 and the undercarriage 5 leads to outer through groove 35 through interior logical groove 34, utilize outer through groove 35 to let in inside siphunculus 2, circulating air pump 3 lets in detector 1 inside with the inert gas of taking out, inert gas after detecting through detector 1 utilizes siphunculus 2 and outer through groove 35 to let in between put on the shelf 4 and the undercarriage 5, repeat above-mentioned process, observe the inside gas composition of putting on the shelf 4 and undercarriage 5 through the LED display screen on detector 1, contain oxygen in the gas composition, explain the gas leakage of detection piece 25, do not have oxygen in the gas composition, explain detection piece 25 leakproofness is good.
The invention also provides a method for detecting the sealing performance of the IGBT, which applies the device for detecting the sealing performance of the IGBT and comprises the following steps:
s1, introducing appropriate oxygen into the cavity inside the detecting element 25, placing the detecting element 25 into the placing groove of the placing table 12, then the detecting element 25 is between the two inner clamping plates 17, pushing the bracket 26 to move, at this time, the rubber frames 32 at the inner ends of the first rotating plate 30 and the second rotating plate 31 correspond to the detecting element 25, and the two fastening devices limit the detecting element 25 by the rubber frames 32.
When the carriage 26 moves at S2, the carriage 26 pulls the inner end of the rotating plate 29 by the side bar 27, the rotating plate 29 further pulls the carriage 23 by the pulling force of the side bar 27, and the carriage 23 slides inside the slide groove 22 of the inner clip 17 by the outer end of the slider 24 until the rubber frame 32 comes into contact with the end face of the detector 25.
S3, a motor is started, the motor works to drive a driving gear 11 to rotate, the driving gear 11 rotates to drive a gear ring 9 to rotate on the surface of a vertical rod 7 by utilizing an annular rack 10, the gear ring 9 moves upwards on the surface of the vertical rod 7 due to the spiral effect of the gear ring 9 and the vertical rod 7, a plurality of gear rings 9 move upwards to further push a lower frame 5 to move upwards synchronously, and the lower frame 5 is matched with an upper frame 4 to extrude a spring 8 when the surface of the vertical rod 7 slides.
S4, when the top surface of the placing table 12 corresponds to the bottom opening of the corresponding groove 14, at this time, the top side edges of the two movable plates 16 can correspond to the inner side of the corresponding groove 14, when the inclined planes 13 around the placing table 12 gradually enter the corresponding groove 14, the inner side walls of the two sides of the corresponding groove 14 can press the movable plates 16 at this time, the movable plates 16 gradually adhere to the inclined planes 13 under the pressing, the movable plates 16 push the inner clamping plates 17 to gradually approach the detection piece 25 by using the connecting rods 18, the two inner clamping plates 17 clamp the detection piece 25 by using the two fastening devices, the stability of the detection piece 25 in the placing groove is ensured until the placing table 12 is completely fastened with the corresponding groove 14, the upper frame 4 corresponds to the lower frame 5 by using the rubber strips 15, so that the gap between the upper frame 4 and the lower frame 5 is blocked, and the sealing performance between the upper frame 4 and the lower frame 5 is ensured.
S5, set up the opening on siphunculus 2, utilize the opening will extract the air between upper ledge 4 and the lower carriage 5, the air of upper ledge 4 and the lower carriage 5 inside and the inside air of siphunculus 2 are taken out through the opening, recycle the opening and let in inert gas to siphunculus 2 and between upper ledge 4 and the lower carriage 5 for inert gas is full of whole sealing device, then carries out the shutoff to the opening.
S6, starting the circulating air pump 3, pumping inert gas by the circulating air pump 3 through the through pipe 2, leading the inert gas between the upper rack 4 and the lower rack 5 to the outer through groove 35 through the inner through groove 34, leading the inert gas to the inside of the through pipe 2 through the outer through groove 35, leading the pumped inert gas to the inside of the detector 1 by the circulating air pump 3, leading the inert gas detected by the detector 1 to the space between the upper rack 4 and the lower rack 5 through the through pipe 2 and the outer through groove 35, repeating the process of inert gas flowing in the detector 1 and the sealing rack in the step S6, observing gas components in the upper rack 4 and the lower rack 5 through the LED display screen on the detector 1, and indicating that the detecting piece 25 leaks gas when the gas components contain oxygen, indicating that the detecting piece 25 has good sealing performance when the gas components do not contain oxygen.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a leakproofness detection device of IGBT which characterized in that: including seal frame and detector (1), detector (1) utilizes siphunculus (2) to correspond the intercommunication with the seal frame, siphunculus (2) are connected with circulating air pump (3), and circulating air pump (3) output corresponds the intercommunication with detector (1), detector (1) includes chip IC and power VCC, the power VCC passes through LED display screen and connects chip IC, the power VCC passes through gas sensing element MQK-2 and resistance R1 ground connection, and the power VCC passes through gas sensing element MQK-2 and resistance R2 and connects the base level of triode VT, triode VT's emitter ground connection, triode VT collecting electrode connects chip IC, chip IC is connected with resistance R3, resistance R1 both ends connect sliding rheostat RP and diode VD in parallel, and resistance R1 both ends still connect in parallel has electric capacity C1, resistance R1 both ends parallel resistance R2 and electric capacity C2.
2. The device for detecting the sealing property of an IGBT according to claim 1, characterized in that: the sealing frame comprises an upper frame (4) and a lower frame (5), a bottom plate (6) is arranged at the bottom of the lower frame (5), vertical rods (7) which are vertically arranged at four corners of the bottom surface of the upper frame (4) are fixedly connected, the bottom end of each vertical rod (7) is fixedly connected with the top surface of the bottom plate (6), the vertical rods (7) respectively penetrate through the four corners of the lower frame (5), a plurality of springs (8) are arranged between the upper frame (4) and the lower frame (5), the springs (8) correspond to the vertical rods (7) one to one, and the springs (8) are sleeved on the surfaces of the vertical rods (7).
3. The device for detecting the sealing property of an IGBT according to claim 2, characterized in that: four corner bottoms of undercarriage (5) all are provided with ring gear (9), ring gear (9) spiral cover connects in montant (7) surface, and ring gear (9) top surface corresponds the laminating with undercarriage (5) bottom surface, a plurality of ring gear (9) utilize annular rack (10) swing joint, and the tooth meshing of the tooth of ring gear (9) circumference lateral surface and annular rack (10) medial surface, annular rack (10) are made by rubber materials, bottom plate (6) top surface is provided with driving gear (11), driving gear (11) and annular rack (10) meshing, and driving gear (11) top is connected with the motor output, the motor is installed in undercarriage (5) bottom surface.
4. The device for detecting the sealing property of an IGBT according to claim 2, characterized in that: a placing table (12) is arranged at the center of the top surface of the lower frame (5), the outer side surfaces of the periphery of the placing table (12) are provided with inclined planes (13), the whole appearance of the placing table (12) is provided with a lug boss, the inclined plane (13) is a boss inclined plane, the length and the width of the top surface of the placing table (12) are smaller than those of the bottom surface of the placing table (12), the inner side of the upper frame (4) is provided with a corresponding groove (14), the placing table (12) is correspondingly matched with the corresponding groove (14), the peripheral inner side walls of the corresponding grooves (14) are all obliquely arranged, the peripheral inner side walls of the corresponding grooves (14) are correspondingly matched with the four inclined planes (13) of the placing table (12), the bottom surface of the upper frame (4) is provided with an annular rubber strip (15), and the annular rubber strip (15) surrounds the bottom opening of the corresponding groove (14), and the upper frame (4) is correspondingly matched with the lower frame (5) by utilizing the rubber strip (15).
5. The device for detecting the sealing property of an IGBT according to claim 4, characterized in that: the movable plates (16) which are parallel to the inclined planes (13) are arranged on two sides of the lower frame (5), the movable plates (16) are located on the outer side of the placing table (12), the distance between the top edges of the two movable plates (16) is smaller than the distance between the bottoms of the two movable plates, the thickness of the top edges of the movable plates (16) is smaller than that of the bottom edges of the movable plates (16), the top edges of the movable plates (16) are correspondingly matched with the inner side walls of the corresponding grooves (14), placing grooves are formed in the inner sides of the placing table (12), inner clamping plates (17) which are matched with the movable plates (16) correspondingly are arranged in the placing grooves, the movable plates (16) and the inner clamping plates (17) are correspondingly connected through connecting rods (18), the connecting rods (18) penetrate through the side edges of the placing table (12), first tangential planes are arranged on the top surfaces of the inner clamping plates (17), and the first tangential planes of the two inner clamping plates (17) are arranged oppositely.
6. The device for detecting the sealing property of an IGBT according to claim 5, characterized in that: two first limiting plates (19) are oppositely arranged inside corresponding grooves (14) of the upper frame (4), the bottom surfaces of the first limiting plates (19) are provided with second tangent surfaces, the second tangent surfaces of the first limiting plates (19) are oppositely arranged with the inner side walls of the adjacent corresponding grooves (14), the second tangent surfaces of the bottom surfaces of the first limiting plates (19) are correspondingly matched with the first tangent surfaces of the top surfaces of the inner clamping plates (17), when the upper frame (4) is covered on the top of the lower frame (5), the second tangent surfaces of the first limiting plates (19) are attached to the first tangent surfaces of the inner clamping plates (17), the inner side surfaces of the two first limiting plates (19) are fixedly connected with flexible clamping blocks (20) through supporting rods, the supporting rods penetrate through the centers of the second limiting plates (21), and the top surfaces of the second limiting plates (21) are fixedly connected with the inner side bottom surfaces of the corresponding grooves (14).
7. The device for detecting the sealing property of an IGBT according to claim 5, characterized in that: the inner side faces of the two inner clamping plates (17) are respectively provided with a sliding groove (22), the two end faces of the inner clamping plates (17) are respectively correspondingly attached to the front side wall and the rear side wall of the mounting groove, a sliding frame (23) is arranged in the mounting groove of the placing table (12), a sliding block (24) penetrates through the center of the sliding frame (23), the sliding frame (23) is in sliding fit with the sliding groove (22) through the sliding block (24), the top face and the bottom face of the sliding groove (22) are all obliquely arranged, and the width of the inner side opening of the sliding groove (22) is smaller than the width of the inner side edge of the sliding groove (22).
8. The device for detecting the sealing property of an IGBT according to claim 7, characterized in that: the center of the placing groove is correspondingly provided with a detection piece (25), the detection piece (25) is positioned between the two inner clamping plates (17), the front end face and the rear end face of the detection piece (25) are respectively provided with a fastening device, the fastening device comprises a support (26), the support (26) comprises two side rods (27) and a middle rod (28), the middle rod (28) is positioned between the two side rods (27), the two side rods (27) of the two supports (26) are respectively arranged corresponding to the two opposite sliding frames (23), the side rods (27) of the support (26) are rotatably connected with the sliding frames (23) by utilizing rotating plates (29), the surface of the middle rod (28) is sleeved with a first rotating piece (30) and a second rotating piece (31), the first rotating piece (30) and the second rotating piece (31) are sleeved and staggered on the surface of the middle rod (28), the inner side ends of the first rotating piece (30) and the second rotating piece (31) correspond to the end face of the detection piece (25), and the inner side ends of the first rotating sheet (30) and the second rotating sheet (31) are respectively provided with a rubber frame (32), the first rotating sheet (30) and the second rotating sheet (31) on the two sides correspondingly clamp the detection piece (25) by utilizing the rubber frames (32), the outer side ends of the first rotating sheet (30) and the second rotating sheet (31) are fixedly connected with the inner side ends of the two sliding blocks (24) by utilizing the pull strips (33), and the two opposite pull strips (33) are arranged in a staggered manner.
9. The device for detecting the sealing property of an IGBT according to claim 4, characterized in that: the centers of the front side and the rear side of the lower frame (5) are respectively provided with an inner through groove (34) in a penetrating way, the centers of the front side and the rear side of the upper frame (4) are respectively provided with an outer through groove (35) in a penetrating way, and the two ends of the through pipe (2) are respectively communicated with the corresponding grooves (14) by the outer through grooves (35).
10. A method for detecting the sealing performance of an IGBT is characterized in that: the device for detecting the sealing performance of the IGBT according to any one of claims 1-9, wherein the detection method comprises the following steps:
step S1, introducing proper oxygen into the cavity inside the detection piece (25), placing the detection piece (25) in the placing groove of the placing table (12), then placing the detection piece (25) between the two inner clamping plates (17), pushing the bracket (26) to move, at this time, the rubber frames (32) at the inner side ends of the first rotating plate (30) and the second rotating plate (31) correspond to the detection piece (25), and limiting the detection piece (25) by the two fastening devices through the rubber frames (32);
step S2, when the bracket (26) moves, the bracket (26) utilizes the side rod (27) to pull the inner side end of the rotating plate (29) to move, the rotating plate (29) further pulls the sliding frame (23) to move under the pulling force of the side rod (27), the sliding frame (23) utilizes the outer side end of the sliding block (24) to slide inside the sliding groove (22) of the inner clamping plate (17) until the rubber frame (32) contacts with the end surface of the detection piece (25);
step S3, starting a motor, driving a driving gear (11) to rotate by the motor, driving the driving gear (11) to rotate so as to drive a toothed ring (9) to rotate on the surface of a vertical rod (7) by utilizing an annular rack (10), enabling the toothed ring (9) to move upwards on the surface of the vertical rod (7) due to the spiral effect of the toothed ring (9) and the vertical rod (7), pushing a lower frame (5) to move upwards synchronously when a plurality of toothed rings (9) move upwards, and enabling the lower frame (5) to be matched with an upper frame (4) when the surface of the vertical rod (7) slides so as to extrude a spring (8);
s4, when the top surface of the placing table (12) corresponds to the bottom opening of the corresponding groove (14), the top side edges of the two movable plates (16) can correspond to the inner side of the corresponding groove (14), when the inclined planes (13) around the placing table (12) gradually enter the corresponding groove (14), the inner side walls of the two sides of the corresponding groove (14) can extrude the movable plates (16), the movable plates (16) are gradually attached to the inclined planes (13) under extrusion, the movable plates (16) push the inner clamping plates (17) to gradually approach the detection piece (25) by using the connecting rods (18), the two inner clamping plates (17) clamp the detection piece (25) by using the two fastening devices, the stability of the detection piece (25) in the placing groove is ensured until the placing table (12) is completely fastened with the corresponding groove (14), the upper frame (4) is correspondingly attached to the lower frame (5) by using the rubber strips (15), thereby plugging a gap between the upper frame (4) and the lower frame (5) and ensuring the sealing property between the upper frame (4) and the lower frame (5);
step S5, opening a through hole on the through pipe (2), extracting air between the upper frame (4) and the lower frame (5) by using the through hole, extracting air in the upper frame (4) and the lower frame (5) and air in the through pipe (2) through the through hole, introducing inert gas into the through pipe (2) and between the upper frame (4) and the lower frame (5) by using the through hole, filling the inert gas into the whole sealing device, and then plugging the through hole;
step S6, starting a circulating air pump (3), pumping inert gas by the circulating air pump (3) through a through pipe (2), leading the inert gas between an upper frame (4) and a lower frame (5) to an outer through groove (35) through an inner through groove (34), leading the inert gas to the inside of the through pipe (2) through the outer through groove (35), leading the pumped inert gas to the inside of a detector (1) by the circulating air pump (3), leading the inert gas detected by the detector (1) to the space between the upper frame (4) and the lower frame (5) through the through pipe (2) and the outer through groove (35), repeating the process of inert gas flowing in the detector (1) and a sealing frame in the step S6, observing gas components in the upper frame (4) and the lower frame (5) through an LED display screen on the detector (1), indicating that a detection piece (25) leaks gas when the gas components contain oxygen, and indicating that the gas components do not contain oxygen, the detection piece (25) has good sealing performance.
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Application publication date: 20220916 |