Low-wear energizing test system for transformer production line

Abstract

The application discloses a low-abrasion power-on test system of a transformer production line, which comprises a transformer transmission guide rail, a transformer sliding groove is arranged on the transformer transmission guide rail along the length direction, a mechanical hand can put the transformer with the metal pin column grabbed upwards into a certain position in the transformer sliding groove, a lifting beam is arranged above the transformer sliding groove, at least one group of taper face guiding plug-in type low-abrasion electrical connector is arranged on the lower side of the lifting beam, the taper face guiding plug-in type low-abrasion electrical connector is electrically connected with a transformer power-on test device through flexible test wires, the physical process of establishment and removal of electrical connection is reconfigured, the traditional sliding friction contact mode is changed, and the order of magnitude of abrasion is reduced.

Description

Technical Field

[0001] This invention belongs to the field of transformer production and testing. Background Technology

[0002] In the final testing stage of the transformer mass production line, in order to ensure that the electrical performance of each product meets the standards, a rigorous power-on test must be carried out on each transformer.

[0003] The core operation of this process is to insert the four precisely arranged metal pins at the bottom of the transformer into the four dedicated electrical connection sockets at the testing station one by one. These sockets usually have elastic metal contacts embedded inside, which tightly clamp the sidewalls of the pins during the initial insertion phase. However, this seemingly simple insertion and removal action harbors significant quality risks under the high-intensity, high-frequency mass production environment: Insertion and removal wear: Whether it is the alignment process during insertion or the removal operation after the test is completed, the metal sidewall of the pin will have continuous, high-stroke sliding friction with the elastic contact inside the socket; each insertion and removal is a tiny physical scratch.

[0004] In mass production, the same testing station needs to process hundreds or thousands of transformers continuously, day after day; this means that the connectors will be inserted and removed extremely frequently. The consequences of this vicious cycle: This high-frequency mechanical friction will rapidly wear down the plating (such as gold or tin) and base metal material on the surface of the socket contacts; at the same time, the exposed fresh metal surface is easily oxidized in the air, forming a non-conductive or high-resistance oxide layer (such as verdigris); the combined effect of wear and oxidation directly leads to a significant increase in the contact resistance between the socket and the pins and a sharp decrease in connection stability.

[0005] Fatal Misjudgment: This unstable connection can introduce abnormal resistance fluctuations, voltage drops, or signal interruptions during power-on testing. The testing device cannot distinguish whether this is a connection problem or a real fault in the transformer itself. Therefore, it is very likely to misjudge a transformer that should be qualified as a defective product, resulting in unnecessary rework or scrapping, which seriously affects production efficiency and yield.

[0006] In addition, the following alignment problems exist during the insertion process: On a high-speed production line, precisely aligning the four pins of a transformer with the four sockets simultaneously is a challenge in itself. Transformer pins may have slight misalignment or angular deviations due to manufacturing tolerances, minor vibrations during handling, or minute errors in robotic arm positioning; at the moment of actual insertion, this may result in some pins not being perfectly perpendicular and centered into their corresponding sockets. This could lead to pins scraping against the socket edge, not being fully inserted, or even being forcibly inserted at an angle. Summary of the Invention

[0007] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a low-wear power-on testing system for transformer production lines, which achieves low wear during the insertion and removal processes.

[0008] Technical solution: To achieve the above objectives, the present invention provides a low-wear power-on testing system for a transformer production line, comprising a transformer transmission rail, on which a transformer chute is provided along its length, and a robotic arm capable of placing a metal-pin-post-facing transformer into a specific position within the transformer chute; a lifting beam is located above the transformer chute, and at least one set of tapered-surface-guided insertion-type low-wear electrical connectors is provided on the lower side of the lifting beam, the tapered-surface-guided insertion-type low-wear electrical connectors being electrically connected to a transformer power-on testing device via flexible test wires; When the transformer in the transformer slot corresponds directly below the conical guide insertion type low-wear electrical connector, the descent of the lifting beam enables the conical guide insertion type low-wear electrical connector to be electrically connected to each metal pin on the transformer, thereby allowing each flexible test lead to be electrically connected to each metal pin through the conical guide insertion type low-wear electrical connector.

[0009] Furthermore, it also includes a transformer translation plate that can move horizontally under the drive of the displacement device, and the transformer translation plate is provided with at least one transformer slot on the side near the transformer slide. By translating the transformer sliding plate, the transformer slot is moved to the upper part of the transformer core in the transformer slide groove. Based on this, by translating the transformer sliding plate, the transformer is driven to slide along the extension direction of the transformer slide groove to another specific position.

[0010] Furthermore, the conical guided insertion low-wear electrical connector includes four laterally arrayed conical horn-shaped pin post guiding insulating cones, with the guide cone opening at the thicker end of the pin post guiding insulating cone facing downwards. Any two adjacent pin post guiding insulating cones are integrally connected by a lateral connector. A horizontal insulating beam is set directly above the integral structure formed by the four pin post guiding insulating cones and the lateral connector. The horizontal insulating beam is integrally connected to the lateral connector by a vertical connector. A lifting beam is fixedly connected to the upper side of the horizontal insulating beam by a bracket.

[0011] Furthermore, the inner diameter of the upper end of the guide cone is just large enough for the metal pin post to pass through.

[0012] Furthermore, each pin post guides the insulating cone with an insulating cap on the upper coaxial center. The lower side of the insulating cap is a top groove, and a guide rod is fixedly connected to the upper side of the insulating cap on the coaxial center. The upper end of the guide rod moves upward through the guide hole on the horizontal insulating beam. Each guide rod has a horizontal conductive beam above it, which is perpendicular to the horizontal insulating beam. The horizontal conductive beam is electrically connected to the corresponding flexible test lead. The two ends of the horizontal conductive beam are fixedly connected to the insulating cap through a pair of insulating inclined beams. Two arc-shaped conductive claws are symmetrically arranged on both sides of the upper part of the lead post guiding insulating cone. In the initial state, the conductive claws do not contact the outer circumference of the lead post guiding insulating cone. The outer arc surface of the conductive claws is simultaneously fixedly connected to an upwardly arcing metal spring and a downwardly arcing roller arm. The upper end of the metal spring is electrically and integrally connected to the horizontal conductive beam. A pair of rollers are rotatably arranged at the lower end of the roller arm, and both rollers roll in cooperation with the outer conical surface of the lead post guiding insulating cone.

[0013] Furthermore, two roller constraint protrusions are provided on the outer peripheral surfaces of the lead post guide insulating cone along the extension direction of the generatrix, so that a roller constraint protrusion is rolled between each pair of rollers, thereby allowing the rollers to roll only along the extension direction of the generatrix of the outer conical surface of the lead post guide insulating cone.

[0014] Furthermore, in the initial state, the metal spring is in an elastic deformation state and stores elastic potential energy. The elastic restoring force of the stored elastic potential energy causes the lower end of the metal spring to tend to swing towards the axis of the lead post guiding insulating cone. At the same time, the elastic restoring force of the metal spring is transmitted through the roller arm as rolling force between the roller and the outer cone surface of the lead post guiding insulating cone. The guide rod is fitted with a spring, which is located between the horizontal insulating beam and the insulating top cap. In the initial state, the downward thrust of the spring on the insulating top cap cancels out the upward component of the reaction force exerted by the outer cone surface of the lead post on each roller. As the integrated structure consisting of the insulating top cap, insulating inclined beam, transverse conductive beam, guide rod, metal spring, conductive claw, roller arm, and roller moves upward, each roller rolls upward along the generatrix extension direction of the outer conical surface of the lead post-guided insulating cone. This causes the metal spring to perform an inward elastic recovery action under the guidance of the generatrix of the outer conical surface of the lead post-guided insulating cone, and causes the two conductive claws to perform a mutual clamping action during the upward movement.

[0015] Furthermore, under the upward push of the metal pin post, the insulating top cap moves upward relative to the pin post guiding insulating cone, thereby separating the insulating top cap from the upper end of the pin post guiding insulating cone. At this time, a section of metal pin post between the lower end of the insulating top cap and the upper end of the pin post guiding insulating cone is exposed. During the relative ascent of the insulating top cap, the metal spring sheet, guided by the busbar of the outer conical surface of the lead post guiding insulating cone, performs an inward elastic recovery action, causing the two conductive claws to move closer to each other and engage during the ascent; until the two conductive claws, under the action of the elastic recovery force of the metal spring sheet, encircle the metal lead post between the lower end of the insulating top cap and the upper end of the lead post guiding insulating cone, thereby reliably electrically connecting the encircled metal lead post with the two conductive claws in an encircling state.

[0016] Beneficial effects: This invention reconstructs the physical process of establishing and dissolving electrical connections, changes the traditional sliding friction contact mode, and achieves an order-of-magnitude reduction in wear. Significantly reduced wear during insertion: During the insertion of the metal pin, the inner wall of the gripper remains in a non-contact state with the side wall of the pin.

[0017] Only when the pin has fully reached the preset depth position (i.e., at the last moment of the insertion process) can the inner wall of the gripper reliably form a tight electrical connection with the side wall of the pin with a large contact area.

[0018] Compared to traditional methods: In traditional sockets, the pins and spring contacts are in a state of continuous, long-distance sliding friction throughout the entire insertion path; while this design almost completely eliminates this process, with only a momentary, static pressing contact occurring at the final insertion point, compressing the path length and duration of insertion friction to almost zero, thus fundamentally and significantly reducing insertion wear.

[0019] Wear and tear is significantly reduced during the removal process: When the detection is complete and the pin needs to be removed, the inner wall of the gripper releases the clamping force on the pin at the initial stage of the removal force application (i.e., the instant the removal action begins); so that the two are in a non-contact or disengaged state for most of the actual removal stroke of the pin.

[0020] Compared to traditional methods, where the pins must overcome the clamping friction of the spring contacts during removal and experience continuous sliding friction in the opposite direction along the entire removal path, this design almost completely avoids this friction process. There is only a very brief contact-separation action at the very beginning of removal, minimizing both the path length and duration of removal friction. Therefore, removal wear is also fundamentally and significantly reduced.

[0021] The multiplier effect of overall wear reduction: The two stages of insertion and removal, which are usually the most wear-prone, have achieved extreme minimization of contact time and friction path. The cumulative wear on the conductive claws and metal pins during the entire insertion and removal cycle is exponentially reduced compared to the traditional sliding contact method. Attached Figure Description

[0022] Figure 1 it is a schematic structural diagram of "step 1" to "step 3" of the overall solution; Figure 2 it is a schematic structural diagram of "step 4" to "step 8" of the overall solution; Figure 3 is Figure 1 is an enlarged schematic diagram of the 8th marking position therein; Figure 4 is Figure 3 is a further enlarged partial structural schematic diagram thereof; Figure 5 is Figure 4 is a further enlarged partial structural schematic diagram thereof; Figure 6 is two state schematic diagrams during the insertion process from "step 3" to "step 4"; Figure 7 is an integrated structural schematic diagram composed of an insulating top cap, an insulating inclined beam, a transverse conductive beam, a guide rod, a metal elastic sheet, a conductive gripping claw, a roller arm and a roller. Detailed Description of Embodiments

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] As shown in the accompanying Figures 1 to 7 the low-wear power-on test system for a transformer production line described above, the transformer in the present solution is an EI transformer, and the four metal pin columns 12 of the transformer 7 include two connected to both ends of the primary winding and two connected to both ends of the secondary winding; test principle: the four metal pin columns 12 of the transformer 7 include two connected to both ends of the primary winding and two connected to both ends of the secondary winding; during testing, an AC test power supply is stably electrically connected to the two metal pin columns 12 at both ends of the primary winding of the transformer 7 through two flexible test wires 2, so that the primary winding of the transformer 7 is supplied with alternating current at a standard voltage. At the same time, the input end of the detection circuit of the test system is stably electrically connected to the two metal pin columns 12 at both ends of the secondary winding of the transformer 7 through another two flexible test wires 2. If the voltage, current and load on the detection circuit are all within the normal fluctuation range, the transformer is judged as qualified; otherwise, it is unqualified.

[0025] As Figure 1 and 2 shown, it comprises a transformer transmission guide rail 6, a transformer sliding chute 4 is arranged on the transformer transmission guide rail 6 along the length direction, the groove width of the transformer sliding chute 4 is consistent with the iron core width of the transformer 7, a mechanical arm can accurately and horizontally place the transformer 7 with upward metal pin columns 12 grabbed thereby into a determined position in the transformer sliding chute 4, and the upper end of the iron core of the transformer 7 placed in the transformer sliding chute 4 just protrudes upward from the upper end of the transformer sliding chute 4.

[0026] A lifting beam 3 is provided directly above the transformer slide 4. At least one set of conical guide insertion type low-wear electrical connectors 5 is provided on the lower side of the lifting beam 3. The conical guide insertion type low-wear electrical connectors 5 are electrically connected to the transformer power-on test device through flexible test wires 2.

[0027] When the transformer 7 in the transformer chute 4 corresponds directly below the conical guide insertion low-wear electrical connector 5, the descent action of the lifting beam 3 enables the conical guide insertion low-wear electrical connector 5 to be inserted into and electrically connected to each metal pin post 12 on the transformer 7, thereby enabling each flexible test lead 2 to be electrically connected to each metal pin post 12 in a one-to-one high-quality manner through the conical guide insertion low-wear electrical connector 5. It also includes a transformer translation plate 1 that can be horizontally displaced under the drive of the displacement device. The transformer translation plate 1 has at least one transformer slot 13 on the side near the transformer slide 4. In this scheme, there are three transformer slots 13. The width of the transformer slot 13 is the same as the width of the iron core of the transformer 7. By translating the transformer translation plate 1, the transformer slot 13 is moved to the upper part of the iron core of the transformer 7 in the transformer slide 4. On this basis, by translating the transformer translation plate 1, the transformer 7 is driven to slide along the extension direction of the transformer slide 4 to another determined position.

[0028] like Figures 3 to 7 As shown, the conical guided insertion type low-wear electrical connector 5 includes four laterally arrayed conical horn-shaped pin post guiding insulating cones 9. The guide cone opening 41 at the thick end of the pin post guiding insulating cone 9 faces downward. Any two adjacent pin post guiding insulating cones 9 are integrally connected by a transverse connector 17. A horizontal insulating beam 14 is provided directly above the integral structure formed by the four pin post guiding insulating cones 9 and the transverse connector 17. The horizontal insulating beam 14 is integrally connected to the transverse connector 17 by a vertical connector 16. The lifting beam 3 is fixedly connected to the upper side of the horizontal insulating beam 14 by a bracket 10.

[0029] The inner diameter of the upper end of the guide cone 41 is just large enough for the metal pin post 12 to pass through.

[0030] Each of the aforementioned pin post guide insulating cones 9 has an insulating cap 28 coaxially mounted on its upper end. The lower side of the insulating cap 28 is a top groove 27. A guide rod 21 is coaxially fixedly connected to the upper side of the insulating cap 28. The upper end of the guide rod 21 moves upward through the guide hole 20 on the horizontal insulating beam 14. Above each of the aforementioned guide rods 21 is a transverse conductive beam 22. The transverse conductive beam 22 is perpendicular to the upper part of the horizontal insulating beam 14. The transverse conductive beam 22 is electrically connected to the corresponding flexible test lead 2. The two ends of the transverse conductive beam 22 are fixedly connected to the insulating cap 28 through a pair of insulating inclined beams 19. Two arc-shaped conductive claws 18 are symmetrically arranged on both sides of the upper part of the lead post guiding insulating cone 9. In the initial state, the conductive claws 18 do not contact the outer circumferential surface of the lead post guiding insulating cone 9, and the inner diameter of the inner arc surface of the two conductive claws 18 on the side that is close to each other is consistent with the outer diameter of the metal lead post 12. Each conductive gripper 18 has an upwardly curved metal spring 23 and a downwardly curved roller arm 24 fixedly connected to its outer arc surface. Metal spring 23 is a metallic elastic component, made of phosphor bronze such as C5191 or C5210, characterized by good conductivity and fatigue resistance, with significantly better elasticity than ordinary copper alloys. Roller arm 24 is a rigid, low-elasticity component, such as high-carbon steel; conductive gripper 18 is a copper alloy, with its inner wall surface plated with gold or silver; other insulating materials in this solution are selected based on actual conditions, such as rigid plastics or ceramics.

[0031] The upper end of the metal spring 23 is electrically and integrally connected to the transverse conductive beam 22; a pair of rollers 25 are rotatably provided at the lower end of the roller arm 24. Specifically, a transverse axle 31 is fixed at the end of the roller arm 24, and a pair of rollers 25 are rotatably engaged at both ends of the axle 31 through bearings; so that the axis of the rollers 25 is horizontal, and both rollers 25 are rollingly engaged with the outer conical surface of the pin post guide insulating cone 9. Two roller constraint protrusions 26 are provided on the outer peripheral surfaces of both sides of the pin post guide insulating cone 9 along the generatrix extension direction, so that a roller constraint protrusion 26 is rolled between any pair of rollers 25, thereby making the rollers 25 roll only along the generatrix extension direction of the outer conical surface of the pin post guide insulating cone 9.

[0032] In the initial state, such as Figure 6 In the figure above, the metal spring 23 is in an elastic deformation state and stores elastic potential energy. The elastic restoring force of the stored elastic potential energy causes the lower end of the metal spring 23 to tend to swing towards the axis of the lead post guide insulating cone 9. At the same time, the elastic restoring force of the metal spring 23 is transmitted through the roller arm 24 as the rolling force between the roller 25 and the outer cone surface of the lead post guide insulating cone 9. The guide rod 21 is sleeved with a spring 29, which is located between the horizontal insulating beam 14 and the insulating cap 28. In the initial state, the downward pushing force of the spring 29 on the insulating cap 28 cancels the upward component of the reaction force exerted by the outer cone surface of the lead post guide insulating cone 9 on each roller 25.

[0033] like Figure 6As shown in the figure below, during the upward movement of the integrated structure consisting of insulating cap 28, insulating inclined beam 19, transverse conductive beam 22, guide rod 21, metal spring 23, conductive gripper 18, roller arm 24 and roller 25, each roller 25 rolls upward along the generatrix extension direction of the outer conical surface of the pin post guiding insulating cone 9, thereby causing the metal spring 23 to perform an inward elastic recovery action under the guidance of the generatrix of the outer conical surface of the pin post guiding insulating cone 9, and causing the two conductive grippers 18 to perform a mutual clamping action during the upward movement.

[0034] Working principle: Step 1: The robotic arm precisely places the metal pin post 12 of the transformer 7, which it has gripped, into a specific position within the transformer slide 4.

[0035] Step 2: By translating the transformer translation plate 1, the transformer clamp 13 is moved to the upper part of the iron core of the transformer 7 in the transformer slide 4.

[0036] Step 3: By translating the transformer translation plate 1, drive each of the stuck transformers 7 to slide along the extension direction of the transformer slide groove 4 until each transformer 7 corresponds to the area directly below each conical guide insertion low wear electrical connector 5. At this time, the four upward-facing metal pin posts 12 on the transformer 7 correspond to the four pin posts of the conical guide insertion low wear electrical connector 5 directly above the insulating cone 9.

[0037] Step four: Control the lifting beam 3 to descend, thereby causing the conical guide insertion low-wear electrical connector 5 to descend as a whole.

[0038] From the perspective of relative motion, the conical guided insertion low-wear electrical connector 5 is regarded as a whole as relatively stationary, while the four upward-facing metal pins 12 on the transformer 7 perform a relatively upward insertion action.

[0039] During the process of inserting the metal pin 12 into the guide cone 41 of the corresponding pin guide insulating cone 9, the inner cone of the guide cone 41 guides the inserted metal pin 12. Even if the metal pin 12 is slightly deviated, the upper end of the metal pin 12 can pass smoothly through the upper end of the guide cone 41. Then, the metal pin 12 that passes through the upper end of the guide cone 41 continues to push the insulating cap 28 upward, so that the insulating cap 28 moves upward relative to the pin guide insulating cone 9 under the upward push of the metal pin 12, thereby separating the insulating cap 28 from the upper end of the pin guide insulating cone 9. At this time, a section of the metal pin 12 between the lower end of the insulating cap 28 and the upper end of the pin guide insulating cone 9 is exposed.

[0040] During the upward movement of the insulating cone 9 guided by the insulating cap 28 relative to the pin post, the integrated structure consisting of the insulating cap 28, insulating inclined beam 19, transverse conductive beam 22, guide rod 21, metal spring 23, conductive claw 18, roller arm 24, and roller 25 together guides the insulating cone 9 relative to the pin post. This causes each roller 25 to roll upward along the generatrix extension direction of the outer cone surface of the insulating cone 9. Consequently, the metal spring 23, guided by the generatrix of the outer cone surface of the insulating cone 9, performs an inward elastic recovery action. This causes the two conductive claws 18 to also perform a mutual clamping action during the upward movement. Until the two conductive claws 18, under the action of the elastic recovery force of the metal spring 23, inwardly encircle a section of the metal pin post 12 between the lower end of the insulating cap 28 and the upper end of the insulating cone 9, thereby reliably electrically connecting the encircled metal pin post 12 with the two conductive claws 18 in an encircling state.

[0041] This allows the four metal pins 12 on the upper part of the transformer 7 to be electrically connected one-to-one with their respective flexible test leads 2 via the conical guide insertion low-wear electrical connector 5. In this step, the encircling electrical connection method ensures that the inner wall of the conductive claw 18 and the metal pin 12 only make close contact at the last moment of the insertion process, which significantly reduces wear compared to the traditional sliding insertion method.

[0042] In this case, during the insertion of the metal pin post 12, the inner wall of the gripper remains in a non-contact state with the side wall of the pin; only at the last moment of the insertion process, when the pin has fully reached the preset depth position, does the inner wall of the gripper reliably form a tight electrical connection with the side wall of the pin with a large contact area.

[0043] Compared to traditional methods: In traditional sockets, the pins and spring contacts are in a state of continuous, long-distance sliding friction throughout the entire insertion path. This design almost completely eliminates this process, with only a momentary, static pressing contact occurring at the final insertion point. This compresses the path length and duration of insertion friction to near zero, thus fundamentally and significantly reducing insertion wear.

[0044] Step 5: At this time, the power-on detection device performs power-on detection on the electrically connected transformer 7 through the flexible test wire 2; Test principle: The four metal pins 12 of transformer 7 include two pins connecting the two ends of the primary winding and two pins connecting the two ends of the secondary winding. During the test, the AC test power supply is stably connected to the two metal pins 12 at both ends of the primary winding of transformer 7 through two flexible test wires 2, so that the primary winding of transformer 7 is supplied with AC power at the standard voltage. At the same time, the input terminal of the detection circuit of the test system is stably connected to the two metal pins 12 at both ends of the secondary winding of transformer 7 through two other flexible test wires 2. If the voltage, current and load on the detection circuit are all within the normal fluctuation range, it is judged as qualified; otherwise, it is unqualified.

[0045] Step 6: After the test is completed, control the lifting beam 3 to rise, thereby raising the conical guide insertion low-wear electrical connector 5 as a whole. From the perspective of relative motion, the tapered guide insertion low-wear electrical connector 5 is regarded as a whole as relatively stationary, and the four upward-facing metal pins 12 on the transformer 7 are pulled out relatively downward. The process of pulling each metal pin 12 downwards is the complete opposite of "Step 5". After the four metal pins 12 of the transformer 7 are pulled away from the tapered guide insertion low-wear electrical connector 5 downwards, the tapered guide insertion low-wear electrical connector 5 adaptively returns to its initial position. Similarly, during the downward pulling action of the metal pins 12 in this step, the inner wall of the conductive claw 18 and the metal pins 12 only make contact at the very beginning of the pulling process, which significantly reduces wear compared to the traditional sliding pulling method. In this design, the inner wall of the gripper releases the clamping force on the pin during the initial stage of the pull-out force application (i.e., the instant the pull-out action begins); thus, the two are in a non-contact or disengaged state for most of the actual pull-out stroke.

[0046] Compared to traditional methods: When a traditional connector is pulled out, the pins must overcome the clamping friction of the spring contacts, experiencing reverse and continuous sliding friction throughout the entire pull-out path. This design almost completely avoids this friction process, with only a very brief contact-separation action at the initial moment of pull-out. This also minimizes the path length and duration of pull-out friction, thus fundamentally and significantly reducing pull-out wear.

[0047] Step 7: By moving the transformer translation plate 1, drive each of the transformers 7 that have completed the inspection to slide along the extension direction of the transformer slide 4 until each of the transformers 7 that have completed the inspection slides to a position directly below the lifting beam 3. Step 8: Then, move the transformer translation plate 1 in the direction perpendicular to the extension of the transformer slide 4, so that the transformer translation plate 1 is disengaged from each transformer 7, releasing the jammed state of each transformer 7, and then remove each transformer 7 by the robot arm.

[0048] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A low-wear energization testing system for a transformer production line, characterized in that: The system includes a transformer transmission rail (6), on which a transformer slide (4) is provided along its length. The robot arm can place the metal pin post (12) facing upwards of the grasped transformer (7) into a certain position in the transformer slide (4). Above the transformer slide (4) is a lifting beam (3), and at least one set of conical guide insertion type low wear electrical connectors (5) is provided on the lower side of the lifting beam (3). The conical guide insertion type low wear electrical connectors (5) are electrically connected to the transformer power-on test device through a flexible test wire (2). When the transformer (7) in the transformer chute (4) corresponds to the area directly below the conical guide insertion low-wear electrical connector (5), the descent of the lifting beam (3) enables the conical guide insertion low-wear electrical connector (5) to be inserted into the metal pin post (12) on the transformer (7) for electrical connection, thereby enabling each flexible test lead (2) to be electrically connected to each metal pin post (12) through the conical guide insertion low-wear electrical connector (5). The conical guide insertion type low wear electrical connector (5) includes four conical horn-shaped pin post guide insulating cones (9) arranged in a horizontal array. The guide cone opening (41) at the thick end of the pin post guide insulating cone (9) faces downward. Any two adjacent pin post guide insulating cones (9) are integrally connected by a horizontal connector (17). A horizontal insulating beam (14) is set directly above the integral structure formed by the four pin post guide insulating cones (9) through the horizontal connector (17). The horizontal insulating beam (14) is integrally connected to the horizontal connector (17) through a vertical connector (16). The upper side of the horizontal insulating beam (14) is fixedly connected to the lifting beam (3) through a bracket (10). Each pin post guides the insulating cone (9) with an insulating cap (28) on the upper end of the coaxial cover. The bottom side of the insulating cap (28) is a top groove (27). The upper side of the insulating cap (28) is coaxially fixedly connected to a guide rod (21). The upper end of the guide rod (21) moves upward through the guide hole (20) on the horizontal insulating beam (14). Each guide rod (21) has a horizontal conductive beam (22) above it. The horizontal conductive beam (22) is perpendicular to the horizontal insulating beam (14) above it. The horizontal conductive beam (22) is electrically connected to the corresponding flexible test wire (2). The two ends of the horizontal conductive beam (22) are fixedly connected to the insulating cap (28) through a pair of insulating inclined beams (19). Two arc-shaped conductive claws (18) are symmetrically arranged on both sides of the upper part of the lead post guide insulating cone (9). In the initial state, the conductive claws (18) do not contact the outer circumference of the lead post guide insulating cone (9). The outer arc surface of the conductive claws (18) is simultaneously fixedly connected to the metal spring (23) extending upward and the roller arm (24) extending downward. The upper end of the metal spring (23) is electrically and integrally connected to the horizontal conductive beam (22). A pair of rollers (25) are rotatably arranged at the lower end of the roller arm (24). Both rollers (25) are in rolling cooperation with the outer cone surface of the lead post guide insulating cone (9).

2. The low-wear energization testing system for a transformer production line according to claim 1, characterized in that: It also includes a transformer translation plate (1) that can be horizontally displaced under the drive of the displacement device, and the transformer translation plate (1) has at least one transformer slot (13) on the side near the transformer slide (4). By translating the transformer translation plate (1), the transformer slot (13) is moved to the upper part of the core of the transformer (7) in the transformer slide (4). On this basis, by translating the transformer translation plate (1), the transformer (7) is driven to slide along the extension direction of the transformer slide (4) to another fixed position.

3. The low-wear energization test system for a transformer production line according to claim 2, characterized in that: The inner diameter of the upper end of the guide cone (41) is just large enough for the metal pin post (12) to pass through.

4. The low-wear energization testing system for a transformer production line according to claim 3, characterized in that: Two roller constraint protrusions (26) are provided on the outer peripheral surfaces of the pin post guiding insulating cone (9) along the generatrix extension direction, so that a roller constraint protrusion (26) is rolled between each pair of rollers (25), so that the rollers (25) can only roll along the generatrix extension direction of the outer cone surface of the pin post guiding insulating cone (9).

5. The low-wear energization testing system for a transformer production line according to claim 4, characterized in that: In the initial state, the metal spring (23) is in an elastic deformation state and stores elastic potential energy. The elastic restoring force of the stored elastic potential energy causes the lower end of the metal spring (23) to tend to swing towards the axis of the lead post guide insulating cone (9). At the same time, the elastic restoring force of the metal spring (23) is transmitted through the roller arm (24) to become the rolling force between the roller (25) and the outer cone surface of the lead post guide insulating cone (9). A spring (29) is provided on the outer sleeve of the guide rod (21). The spring (29) is located between the horizontal insulating beam (14) and the insulating cap (28). In the initial state, the downward thrust of the spring (29) on the insulating cap (28) cancels the upward component of the reaction force exerted by the outer cone surface of the lead post guiding the insulating cone (9) on each roller (25). During the upward movement of the integrated structure consisting of the insulating top cap (28), insulating inclined beam (19), transverse conductive beam (22), guide rod (21), metal spring (23), conductive claw (18), roller arm (24) and roller (25), each roller (25) rolls upward along the generatrix extension direction of the outer conical surface of the lead post-guided insulating cone (9), thereby causing the metal spring (23) to perform an inward elastic recovery action under the guidance of the generatrix of the outer conical surface of the lead post-guided insulating cone (9), and causing the two conductive claws (18) to perform a mutual clamping action during the upward movement.

6. The low-wear energization test system for a transformer production line according to claim 5, characterized in that: The insulating top cap (28) is pushed upward relative to the pin post guiding insulating cone (9) by the metal pin post (12), thereby separating the insulating top cap (28) from the upper end of the pin post guiding insulating cone (9). At this time, a section of metal pin post (12) between the lower end of the insulating top cap (28) and the upper end of the pin post guiding insulating cone (9) is exposed. During the relative ascent of the insulating cap (28), the metal spring (23) performs an inward elastic recovery action under the guidance of the busbar of the outer cone surface of the lead post guiding insulating cone (9), causing the two conductive claws (18) to also perform a mutual clamping action during the ascent; until the two conductive claws (18) are inwardly wrapped around a section of metal lead post (12) between the lower end of the insulating cap (28) and the upper end of the lead post guiding insulating cone (9) under the action of the elastic recovery force of the metal spring (23), thereby so that the two conductive claws (18) are reliably electrically connected to the wrapped metal lead post (12) in a wrapped state.

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