A pole-mounted circuit breaker mechanical life testing device and testing method thereof

Abstract

The application discloses a kind of pole-mounted circuit breaker mechanical life testing device and testing method thereof, it is related to pole-mounted circuit breaker testing technical field, including test table and the test cabinet being arranged in test table side, the automatic docking mechanism is arranged on the test table, the test table is placed with several circuit breaker main bodies, the impact force of opening and closing during mechanical life test can be converted into circumferential rotation and friction offset by using touch clamp plate, energy-absorbing block cooperation energy-absorbing cylinder, friction ring after the pole-mounted circuit breaker of the application is positioned and fixed, direct transmission is avoided, it is favorable to improve the stability of testing device;The application can realize the pole-mounted circuit breaker to be right to appropriate position and automatically shift to station by automatic docking mechanism, after reaching station, circuit breaker is directly just right state, it is favorable to improve the working efficiency of testing device, reduce labor intensity of operator, improve the degree of automation of pole-mounted circuit breaker mechanical life testing process.

Description

Technical Field

[0001] This invention relates to the field of pole-mounted circuit breaker testing technology, specifically to a pole-mounted circuit breaker mechanical life testing device and its testing method. Background Technology

[0002] Pole-mounted circuit breakers are key equipment in power distribution lines, responsible for control, protection, and fault isolation. Their mechanical performance directly affects the reliability of power grid operation. Mechanical life testing devices are mainly used to simulate the opening and closing actions of pole-mounted circuit breakers in actual operation. Through continuous automatic opening and closing operations, the durability and operational reliability of the circuit breaker's operating mechanism, transmission components, and overall structure are tested, verifying whether it meets the mechanical life cycle requirements specified in the standard. This provides objective data support for product factory testing, quality assessment, and performance optimization.

[0003] Currently, there is a lack of measures for positioning and fixing pole-mounted circuit breakers during mechanical life testing. In conventional pole-mounted circuit breaker testing, personnel simply place the circuit breaker arbitrarily before testing, causing the circuit breaker body to shift and shake due to the impact force of opening and closing. This affects the stability of the pole-mounted circuit breaker during the mechanical life test. At the same time, the testing device cannot actively absorb the impact force during opening and closing, causing the impact energy of the pole-mounted circuit breaker to act directly on the positioning and fixing structure during the mechanical life test, which will aggravate positioning deviation and structural damage.

[0004] Furthermore, traditional pole-mounted circuit breaker mechanical life testing requires personnel to place the circuit breaker on the test bench and manually align it, which is labor-intensive and inefficient, resulting in a low degree of automation in the mechanical life testing of pole-mounted circuit breakers. In addition, traditional pole-mounted circuit breaker mechanical life testing also requires manual insertion and connection of plugs, which is prone to misalignment, improper insertion, poor contact, etc., leading to abnormal test signals, data distortion, and test interruption. Summary of the Invention

[0005] To address the above problems, this invention provides a mechanical life testing device and method for pole-mounted circuit breakers, thus solving the aforementioned issues.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mechanical life testing device for pole-mounted circuit breakers, comprising a test bench and a test cabinet disposed on one side of the test bench, an automatic docking mechanism being provided on the test bench, a plurality of circuit breaker bodies being placed on the test bench, a support being installed at the bottom of the test bench, a positioning mechanism being installed at the top of the support being installed, and a plurality of positioning slots being provided on the test bench.

[0007] The positioning mechanism includes a connecting plate, a positioning block connected to one side of the connecting plate, the positioning block being disposed in a positioning groove, one side of the circuit breaker body being disposed in the positioning groove, a telescopic rod connected to one side of the connecting plate, a floating frame connected to one end of the telescopic rod, the floating frame being disposed in a test bench, a plurality of ball bearings being connected to the floating frame, a positioning plate being disposed in the positioning groove, two sliding rods connected to one side of the positioning plate, an extension frame and a retraction frame respectively connected to one end of the two sliding rods, the extension frame and the retraction frame being disposed on the upper and lower sides of the floating frame respectively.

[0008] Preferably, one side of the positioning plate is provided with an energy-absorbing groove, two guide posts are connected in the energy-absorbing groove, an energy-absorbing block is provided on the guide post, an energy-absorbing pressure rod is connected to the bottom of the energy-absorbing block, a base frame is connected in the energy-absorbing groove, an energy-absorbing cylinder is rotatably connected to the base frame, the energy-absorbing pressure rod and the energy-absorbing cylinder are both sleeved on the outside of the guide posts, a guide groove is provided on the inner wall of the energy-absorbing cylinder, a guide protrusion is connected to the outside of the energy-absorbing pressure rod, the guide protrusion is set in the guide groove, a fixing rod is connected in the base frame, a friction ring is connected to one side of the fixing rod, the friction ring is set outside the energy-absorbing cylinder, a miniature electric cylinder is provided in the positioning plate, and the output end of the miniature electric cylinder is connected to one end of the fixing rod.

[0009] Preferably, a return spring is installed in the energy-absorbing groove, the return spring is sleeved on the outside of the guide post, one end of the return spring is connected to one end of the energy-absorbing block, a positioning post is connected to one side of each of the two energy-absorbing blocks, a contact clamp is connected to one side of the positioning post, a driven plate is connected to the outside of the positioning post, a stop tongue is connected to the outside of the two driven plates, and a stop post is connected to one side of the energy-absorbing groove.

[0010] Preferably, the automatic docking mechanism includes two traveling components, which are disposed in the test platform. A slide is connected to the top of the traveling components, and two electric push rods are connected to one side of the slide. The output end of the electric push rod is connected to an L-plate. An electric push rod is connected to one side of the slide, and the output end of the electric push rod is connected to an adjustment plate. A sliding groove is provided inside the adjustment plate, and a driving rack, two gears, and four driven racks are disposed in the sliding groove.

[0011] Preferably, two of the driven racks are positioned above the driving rack, and the other two driven racks are positioned below the driving rack. The driving rack is connected to the middle of the gear, and the upper and lower sides of the gear are respectively connected to the driven racks. The driving rack moves in the slide groove to drive the two gears to rotate for transmission. One end of each of the four driven racks is connected to two outer clamping plates.

[0012] Preferably, a sleeve is connected to one side of each of the two outer clamping plates, a sleeve rod is connected to the sleeve, a floating clamping plate is connected to one side of the sleeve rod, a plurality of floating springs are connected between the floating clamping plate and the outer clamping plate, and a plurality of omnidirectional balls are connected to one side of the floating clamping plate.

[0013] Preferably, an auxiliary platform is connected to the test platform to assist the walking component. A cylinder is installed on the auxiliary platform, and a positioning angle plate is connected to the output end of the cylinder. A fixed cylinder is provided on one side of the positioning angle plate, and a plug is provided in the fixed cylinder. Several floating parts are connected in the fixed cylinder, and the other side of the floating parts is connected to the outside of the plug.

[0014] Preferably, a through groove is provided on one side of the positioning angle plate, a locking rod is provided in the through groove, a guide groove is provided in the locking rod, a positioning pin is provided in the through groove, the positioning pin is provided in the guide groove, a locking cover is provided on the outside of the plug, a ring block is connected to the outside of the locking cover, the ring block is installed in the locking rod, and the movement of the locking rod causes the ring block to rotate.

[0015] Preferably, a fixed base is connected to one side of the positioning angle plate, an electric push rod three is connected to the fixed base, a connecting frame is connected to the output end of the electric push rod three, an opening slot is opened on one side of the locking rod, and the connecting frame is connected to the opening slot.

[0016] A method for testing the mechanical life of a pole-mounted circuit breaker includes the following steps:

[0017] S1. First, the personnel move the pole-mounted circuit breaker to the test bench and use the automatic docking mechanism to position and straighten the pole-mounted circuit breaker. Then, the straightened pole-mounted circuit breaker is transferred to the corresponding work station. Repeating this operation can position multiple pole-mounted circuit breakers and perform multi-work station testing.

[0018] S2. After the pole-mounted circuit breaker arrives at the designated work position, the base of the pole-mounted circuit breaker will be positioned in the positioning slot. At this time, the positioning block of the positioning mechanism descends in the positioning slot, driving the base of the pole-mounted circuit breaker to be positioned in the positioning slot.

[0019] S3. At the same time, the four positioning plates of the positioning mechanism position and fix the base of the pole-mounted circuit breaker. During the mechanical life test of the pole-mounted circuit breaker, when the positioning plates keep the base in position and fixation, they will also buffer and absorb vibration through the contact clamp plate and the energy absorption block.

[0020] S4. After the pole-mounted circuit breaker is positioned and fixed at the work station, the cylinder of the automatic docking mechanism drives the positioning angle plate and plug to connect with the interface of the pole-mounted circuit breaker. Then, the locking cover is automatically locked to the interface. Finally, the mechanical life test of the pole-mounted circuit breaker is carried out by controlling the test cabinet.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. In this application, after the pole-mounted circuit breaker is transferred to the work station, the positioning block sinks down to drive the base of the pole-mounted circuit breaker to descend into the positioning slot of the test bench. At the same time, when it sinks into the positioning slot, the floating frame drives the extension frame to move, so that the positioning plate positions and fixes the base of the circuit breaker body. This solves the problem that there is currently no measure to position and fix the pole-mounted circuit breaker during mechanical life testing. In conventional pole-mounted circuit breaker testing, the personnel place the pole-mounted circuit breaker randomly and then conduct the test directly, which causes the circuit breaker body to shift and shake due to the impact force of opening and closing. This is beneficial to improve the stability of the pole-mounted circuit breaker during mechanical life testing.

[0023] 2. After the pole-mounted circuit breaker is positioned and fixed, this application uses a contact clamp, an energy-absorbing block, an energy-absorbing cylinder, and a friction ring to convert the impact force of opening and closing during mechanical life testing into a circumferential rotational force and cancel it out by friction. This avoids the direct transmission of impact force, maintains the adaptability of the pole-mounted circuit breaker after positioning and fixing, and solves the problem that traditional testing devices cannot actively absorb the impact force during opening and closing, which causes the impact energy of the pole-mounted circuit breaker to act directly on the positioning and fixing structure during mechanical life testing, which will aggravate positioning deviation and structural damage. This is beneficial to improving the stability of the testing device.

[0024] 3. When placing the pole-mounted circuit breaker, personnel only need to place the pole-mounted circuit breaker on the test bench. This application can realize the alignment of the pole-mounted circuit breaker to the appropriate position and automatically transfer it to the work station through the automatic docking mechanism. After arriving at the work station, it is directly in the appropriate position, which is convenient for direct positioning and fixing. This solves the problem that in the traditional pole-mounted circuit breaker mechanical life test, personnel need to place the pole-mounted circuit breaker on the test bench and manually align it, which is labor-intensive and inefficient, resulting in a low degree of automation in the mechanical life test of pole-mounted circuit breakers. It is conducive to improving the working efficiency of the testing device, reducing the labor intensity of operators, and improving the automation level of the pole-mounted circuit breaker mechanical life test process.

[0025] 4. This application, through the use of a positioning angle plate and locking rod, can automatically connect the plug connected to the test cabinet to the interface of the pole-mounted circuit breaker after the pole-mounted circuit breaker is positioned and fixed, and lock it after insertion to prevent the plug from loosening due to the impact of opening and closing. This solves the problem that the traditional pole-mounted circuit breaker mechanical life test requires manual insertion of the plug, which is prone to misalignment, incomplete insertion, poor contact, etc., leading to abnormal test signals, data distortion, and test interruption. It ensures that the plug is properly inserted and makes good contact during the test, maintaining the continuity of the test process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall first-view structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall second-view structure of the present invention;

[0028] Figure 3 This is a schematic cross-sectional view of the test bench of the present invention;

[0029] Figure 4 This is a schematic diagram of the positioning plate structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of region A of the present invention;

[0031] Figure 6 This is a schematic diagram of the energy-absorbing pressure bar and energy-absorbing cylinder structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the bottom structure of the test platform of the present invention;

[0033] Figure 8 This is a partial structural diagram of the test bench of the present invention;

[0034] Figure 9 This is a schematic diagram of a portion of the automatic docking mechanism of the present invention;

[0035] Figure 10 This is a partial structural diagram of the present invention;

[0036] Figure 11 This is a schematic diagram of the plug connection structure of the present invention;

[0037] Figure 12 This is a schematic diagram of the internal structure of the fixed cylinder of the present invention.

[0038] The diagram shows the following components: 1. Test cabinet; 2. Test bench; 3. Circuit breaker body; 4. Positioning mechanism; 5. Connecting plate; 6. Positioning block; 7. Telescopic rod; 8. Floating frame; 9. Ball bearing; 10. Extending frame; 11. Retracting frame; 12. Sliding rod; 13. Positioning plate; 14. Energy absorption groove; 15. Guide post; 16. Energy absorption block; 17. Energy absorption pressure rod; 18. Guide protrusion; 19. Guide curved groove; 20. Energy absorption cylinder; 21. Base frame; 22. Fixed rod; 23. Friction ring; 24. Return spring; 25. Positioning post; 26. Driven plate; 27. Stopping tongue; 28. Stopping post; 29. ​​Contact. 30. Clamping plate; 31. Automatic docking mechanism; 32. Walking component; 33. Slide table; 34. Electric push rod one; 35. L-plate; 36. Electric push rod two; 37. Adjustment plate; 38. Driving rack; 39. Gear; 40. Driven rack; 41. Outer clamping plate; 42. Sleeve rod; 43. Floating spring; 44. Floating clamping plate; 45. Universal ball; 46. Auxiliary table; 47. Cylinder; 48. Positioning angle plate; 49. Fixed cylinder; 50. Plug; 51. Floating component; 52. Locking rod; 53. Locking cover; 54. Ring block; 55. Fixed seat; 56. Electric push rod three; 57. Connecting frame. Detailed Implementation

[0039] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0040] Please see Figure 1 , Figure 2 A pole-mounted circuit breaker mechanical life testing device includes a test bench 2 and a test cabinet 1 set on one side of the test bench 2. The test cabinet 1 is the core unit of the pole-mounted circuit breaker mechanical life testing system for control, drive, detection and data management. It is electrically connected to the pole-mounted circuit breaker through a dedicated plug-in cable and plug 50.

[0041] Before the test, the staff set parameters such as the number of cycles, opening and closing intervals, and action sequence for the mechanical life test on test cabinet 1. After the test starts, the control module inside test cabinet 1 outputs opening and closing drive signals according to the preset program, which are transmitted to the circuit breaker through the plug-in wire to control it to perform opening and closing actions.

[0042] During the operation of the circuit breaker, the test cabinet 1 collects feedback information such as the status of the auxiliary contacts, the operation position signal, and the operation time of the circuit breaker in real time through the plug-in wire to determine whether the opening and closing are in place and whether the operation is normal. At the same time, the test cabinet 1 counts, times and judges the status of each operation. If abnormal situations such as jamming, failure to operate, or false operation occur, it can automatically identify and shut down the protection.

[0043] Test cabinet 1 records data such as the number of actions, action sequence, and fault information throughout the entire process. After completing the specified number of mechanical life tests, it outputs the test results and judgment conclusions, thereby realizing the automated testing, monitoring, and performance evaluation of the mechanical life of pole-mounted circuit breakers.

[0044] Test bench 2 is equipped with an automatic docking mechanism 30. Several circuit breaker bodies 3 are placed on test bench 2. A support platform is installed at the bottom of test bench 2. Please refer to [link / reference]. Figure 7 A hydraulic cylinder is installed on the support platform. The output end of the hydraulic cylinder drives the connecting plate 5 to fall and rise, so that the connecting plate 5 will drive several positioning blocks 6 to fall and rise synchronously. A positioning mechanism 4 is installed on the top of the support platform. Several positioning slots are opened on the test platform 2. The positioning slots provide space for positioning and fixing the base of the pole-mounted circuit breaker. As the positioning block 6 falls, it can drive the base of the circuit breaker into the positioning slot, and cooperate with the positioning plate 13 to complete the positioning and fixing of the pole-mounted circuit breaker.

[0045] Please see Figure 3 The positioning mechanism 4 includes a connecting plate 5, a positioning block 6 connected to one side of the connecting plate 5, the positioning block 6 being set in the positioning groove, the circuit breaker body 3 being set in the positioning groove on one side, and a telescopic rod 7 connected to one side of the connecting plate 5. The telescopic rod 7 is used to compensate for the difference between the moving distance of the floating frame 8 and the moving distance of the positioning block 6. The telescopic rod 7 can be used to make the positioning block 6 descend first, at which time the floating frame 8 remains stationary. Then, when the telescopic rod 7 reaches its limit distance, the descent of the positioning block 6 will drive the floating frame 8 to descend, thereby achieving the positioning and clamping of the positioning plate 13.

[0046] Similarly, the same applies when the positioning block 6 rises. Specifically, the positioning block 6 rises first, causing one end of the telescopic rod 7 to retract. When it retracts to its limit distance, the rise of the positioning block 6 will cause the floating frame 8 to rise, thus releasing the positioning plate 13. One end of the telescopic rod 7 is connected to the floating frame 8. The test bench 2 has a slot for the floating frame 8 and sliding rods 12 to move, thus providing space for the movement of the floating frame 8 and other components. The floating frame 8 is set in the test bench 2, and several ball bearings 9 are connected to the floating frame 8. The positioning plate 13 is set in the positioning slot. Two sliding rods 12 are connected to one side of the positioning plate 13. One end of the two sliding rods 12 is connected to the extension frame 10 and the retraction frame 11, respectively. 0. The retraction frame 11 is respectively set on the upper and lower sides of the floating frame 8. When the positioning block 6 descends and drives the pole-mounted circuit breaker base into the positioning groove, the positioning plate 13 will also move in time to clamp and position the circuit breaker base as the positioning block 6 descends. Specifically, when the positioning block 6 descends to a certain distance, it will drive the floating frame 8 to descend through the telescopic rod 7. When the floating frame 8 descends, its outer ball bearing 9 will roll into its corresponding several extension frames 10. It should be noted that when the ball bearing 9 enters the extension frame 10, it will push the extension frame 10 open and move towards the circuit breaker base, so that the several extension frames 10 drive the sliding rod 12 and the positioning plate 13 to move synchronously to clamp and position the four sides of the pole-mounted circuit breaker base.

[0047] When the circuit breaker is released, the positioning block 6 needs to rise to lift the circuit breaker. As the positioning block 6 rises, it drives the floating frame 8 to rise. When the floating frame 8 rises, the external ball bearings 9 will enter the retraction frame 11. Similarly, the ball bearings 9 will push the retraction frame 11 to move away from the circuit breaker, so that the positioning plate 13 will release the circuit breaker base at the same time. In this way, the positioning block 6 can complete the positioning, fixing and releasing of the circuit breaker base when it sinks into the positioning groove and is lifted. After the circuit breaker is positioned and fixed, subsequent testing can be carried out.

[0048] Please see Figure 4 , Figure 5 , Figure 6 One side of some positioning plates 13 is provided with an energy-absorbing groove 14, and two guide posts 15 are connected in the energy-absorbing groove 14. An energy-absorbing block 16 is provided on the guide post 15. After the pole-mounted circuit breaker is positioned and fixed, the contact clamps 29 on one side of two of the positioning plates 13 contact the circuit breaker base for fixing. The other two positioning plates 13 have smooth surfaces. In this way, the two positioning plates 13 only position the circuit breaker base and maintain the relative movement of the circuit breaker base, so as to avoid interfering with the normal energy absorption of the contact clamps 29.

[0049] The energy-absorbing block 16 is connected to the contact clamp plate 29 by the positioning column 25. When the circuit breaker is positioned and fixed for testing, the internal operating mechanism will release or store spring energy instantly when the pole-mounted circuit breaker performs opening and closing actions, which will drive the contacts, connecting rods and other components to move rapidly, thereby generating instantaneous and violent mechanical impact and vibration. This vibration is characterized by large impact force, high frequency and short duration, and will be directly transmitted to the circuit breaker body, base and test fixture. During the continuous mechanical life test, the repeated impact vibration generated by opening and closing will cause the circuit breaker to shake, shift and loosen, and at the same time cause the test fixture to resonate, which will aggravate the structural stress and wear.

[0050] Therefore, in order to avoid the impact energy acting directly on the positioning and fixing structure, which would aggravate the positioning deviation and structural damage, after the circuit breaker is positioned and fixed, the contact plate 29 maintains a certain degree of mobility, that is, the vibration of the circuit breaker opening and closing is transmitted to the contact plate 29. At this time, the contact plate 29 drives the energy-absorbing block 16 to descend. The energy-absorbing block 16 descends along the guide post 15, which will drive the energy-absorbing pressure rod 17 to descend in the energy-absorbing cylinder 20.

[0051] It is important to note that when the energy-absorbing pressure rod 17 descends, its external guide protrusion 18 will move in the guide groove 19 inside the energy-absorbing cylinder 20. Because the guide protrusion 18 is fixed by the energy-absorbing pressure rod 17, it will remain vertically descending. As a result, the energy-absorbing cylinder 20 will be affected by the guide groove 19. When the energy-absorbing pressure rod 17 descends, the energy-absorbing cylinder 20 will rotate. When the energy-absorbing cylinder 20 rotates, it will rub against the friction ring 23. The friction ring 23 will hinder the rotation of the energy-absorbing cylinder 20. Therefore, the impact force of opening and closing the circuit breaker during the test is transmitted to the energy-absorbing block 16, the energy-absorbing pressure rod 17, and the energy-absorbing cylinder 20. The impact force is converted into friction force and consumed by the rotation of the energy-absorbing cylinder 20 and the cooperation of the friction ring 23.

[0052] Specifically, when the impact force of opening and closing is applied to the energy-absorbing cylinder 20 and causes it to rotate, the outer wall of the energy-absorbing cylinder 20 and the friction ring 23 rotate relative to each other. The two are in close contact and generate continuous frictional resistance. This frictional resistance continuously hinders the rotation of the energy-absorbing cylinder 20, so that the impact kinetic energy is gradually converted into frictional heat energy at the relative rotation interface, thereby realizing the gradual dissipation of impact energy. This avoids the repeated transmission and superposition of impact energy in the test system, weakens the impact of vibration and impact on the positioning and fixing structure from the source, and prevents elastic rebound, secondary impact and resonance amplification. It can continuously and stably consume vibration energy and maintain a stable vibration reduction and energy absorption effect in high-frequency and multiple opening and closing tests. This makes it more reliable to maintain the stability of the circuit breaker after positioning and fixing, and greatly improves the stability of the test process and the reliability of the data.

[0053] An energy-absorbing pressure rod 17 is connected to the bottom of the energy-absorbing block 16. A base frame 21 is connected to the energy-absorbing groove 14. An energy-absorbing cylinder 20 is rotatably connected to the base frame 21. Both the energy-absorbing pressure rod 17 and the energy-absorbing cylinder 20 are sleeved on the outside of the guide post 15. A guide groove 19 is opened on the inner wall of the energy-absorbing cylinder 20. A guide protrusion 18 is connected to the outside of the energy-absorbing pressure rod 17. The guide protrusion 18 is set in the guide groove 19. A fixing rod 22 is connected to the base frame 21. A friction ring 23 is connected to one side of the fixing rod 22. 23 is set outside the energy-absorbing cylinder 20. A micro electric cylinder is set in the positioning plate 13. The output end of the micro electric cylinder is connected to one end of the fixing rod 22. The micro electric cylinder adjusts and controls the friction between the friction ring 23 and the energy-absorbing cylinder 20. When the energy-absorbing block 16 is reset, the energy-absorbing cylinder 20 can be loosened appropriately so that the energy-absorbing cylinder 20 can be slowly and controllably reset. The micro electric cylinder is a known technology. Those skilled in the art can and should understand its specific function and structure, so it will not be described in detail here.

[0054] A return spring 24 is installed in the energy absorption groove 14. The return spring 24 is sleeved on the outside of the guide post 15. One end of the return spring 24 is connected to one end of the energy absorption block 16. A positioning post 25 is connected to one side of each of the two energy absorption blocks 16. A contact clamp 29 is connected to one side of the positioning post 25. A driven plate 26 is connected to the outside of the positioning post 25. A stop tongue 27 is connected to the outside of the two driven plates 26. A stop post 28 is connected to one side of the energy absorption groove 14. A buffer pad is provided on the top of the stop post 28 to prevent the stop tongue 27 from colliding hard with the stop post 28. It should be noted that when the energy absorption block 16 descends to absorb energy and reduce vibration, it not only consumes the impact force through the energy absorption cylinder 20, but also resists the impact force through the stop tongue 27 to prevent the contact clamp 29 from moving too much with the circuit breaker and affecting the accuracy of the test.

[0055] Specifically, when the circuit breaker vibrates and drives the energy-absorbing block 16 to descend via the contact clamp 29, the energy-absorbing block 16 will drive the driven plate 26 to descend. It should be noted that the descent of the driven plate 26 is driven by the energy-absorbing block 16 on the one hand, and on the other hand, one side of the driven plate 26 needs to roll in the energy-absorbing groove 14. The two work together to achieve synchronous movement of the energy-absorbing block 16 and the driven plate 26. Therefore, when the energy-absorbing block 16 descends, the rotation of the two driven plates 26 causes the two stop tongues 27 to engage together, and engage with the stop post 28 to form a pressing stop, which limits the descent distance of the energy-absorbing block 16, prevents it from sinking excessively or overtraveling, and avoids damage or failure of the energy-absorbing structure due to excessive impact. Together with the energy-absorbing structure, it forms a double protection of buffering and limiting vibration reduction.

[0056] Please see Figure 8 , Figure 9 , Figure 10The automatic docking mechanism 30 includes two traveling components 31. The traveling components 31 are conventional traveling trolleys, a technology that is already very mature and well-known, so they will not be described in detail here. The movement of the pole-mounted circuit breaker after it is placed on the test bench 2 is accomplished by the movement of the traveling components 31. However, before transferring the pole-mounted circuit breaker to the work station, the circuit breaker needs to be positioned and aligned. The traveling components 31 are located in the test bench 2, and a slide table 32 is connected to the top of the traveling components 31. Two electric push rods 33 are connected to one side of the slide table 32. The output end of the first push rod 33 is connected to the L plate 34. The side of the slide table 32 is connected to the second electric push rod 35. The output end of the second electric push rod 35 is connected to the adjustment plate 36. The adjustment plate 36 has a sliding groove inside, in which the driving rack 37, two gears 38, and four driven racks 39 are installed. The personnel can place the pole-mounted circuit breaker on the test table 2. Subsequently, the traveling component 31 will move to the pole-mounted circuit breaker. It should be noted that the personnel do not need to deliberately straighten the pole-mounted circuit breaker; they only need to place the circuit breaker in the correct orientation.

[0057] The traveling component 31 drives the slide table 32 to the pole-mounted circuit breaker. The output end of the electric push rod 35 retracts and the adjusting plate 36 moves to the bottom of the pole-mounted circuit breaker (between the bases). An electric cylinder is also installed in the adjusting plate 36. The output end of the electric cylinder is connected to the driving rack 37. The output end of the electric cylinder will drive the driving rack 37 to move. Therefore, when the driving rack 37 moves, it will drive two gears 38 to rotate. The two gears 38 drive two sets of driven racks 39 to move. The two sets of driven racks 39 are respectively set on the upper and lower sides of the driving rack 37. The two sets of driven racks 39 move to the sides respectively, driving the two outer clamps 40 to move to the sides synchronously, thereby supporting the inner sides of the circuit breaker base.

[0058] Two driven racks 39 are positioned above the driving rack 37, and the other two driven racks 39 are positioned below the driving rack 37. The driving rack 37 is connected to the middle of the gear 38, and the upper and lower sides of the gear 38 are connected to the driven racks 39 respectively. The driving rack 37 moves in the slide groove, driving the two gears 38 to rotate for transmission. One end of each of the four driven racks 39 is connected to two outer clamping plates 40.

[0059] Each of the two outer clamping plates 40 has a sleeve 41 connected to one side. A sleeve rod 42 is connected to one side of the sleeve rod 42, and a floating clamping plate 44 is connected to one side of the sleeve rod 42. Several floating springs 43 connect the floating clamping plate 44 to the outer clamping plate 40, and several universal balls 45 are connected to one side of the floating clamping plate 44. When supporting the inner side of the circuit breaker base, the outer clamping plate 40 will move the floating clamping plate 44 to contact the inner side of the circuit breaker base. Because the circuit breaker can be placed arbitrarily to maintain its orientation, it may be tilted. Therefore, when the floating clamping plate 44 contacts the inner side, it will preferentially contact part of the circuit breaker base (the circuit breaker is tilted). As the outer clamping plate 40 moves the floating clamping plate 44 outward continuously, the several universal balls 45 on the floating clamping plate 44 will roll, allowing the circuit breaker to be easily and quickly straightened by the floating clamping plate 44 when it is supported. Regarding the alignment process, it should be noted that, to avoid structural damage caused by rigid contact, the floating clamp 44 slides within the sleeve 41 via the sleeve rod 42, in conjunction with the floating spring 43, to ensure flexibility in the alignment of the floating clamp 44 with the circuit breaker base. This flexibility prevents rigid contact and compression between the floating clamp 44 and the circuit breaker base, automatically compensating for dimensional errors and positional deviations during alignment. This prevents deformation, scratches, or structural damage to the circuit breaker base caused by excessive support force or rigid contact. Simultaneously, it adaptively conforms to the contour of the circuit breaker base, ensuring smooth and reliable alignment. This achieves precise positioning while effectively protecting the workpiece, improving the stability and safety of the entire loading and alignment process. Additionally, the ball bearings on the test bench 2 assist in adjusting the circuit breaker's position at the bottom.

[0060] Once the circuit breaker is aligned, the output ends of the four electric push rods 33 drive the L-plates 34 to move, so that the four L-plates 34 simultaneously position the four corners of the circuit breaker, making the circuit breaker centered on the test bench 2. At this time, the base of the circuit breaker is exactly located on the two rows of rolling balls on the test bench 2. Then, the traveling component 31 uses the outer clamping plate 40 and the floating clamping plate 44 to support the circuit breaker, and the L-plates 34 to position the four corners of the circuit breaker, to move the circuit breaker and move the circuit breakers one by one to the corresponding work positions.

[0061] Please see Figure 11 , Figure 12The test bench 2 is connected to an auxiliary platform 46, which assists the walking component 31. A cylinder 47 is mounted on the auxiliary platform 46, and its output end is connected to a positioning angle plate 48. The positioning angle plate 48 is adapted to the corner of the circuit breaker; that is, when the plug 50 is inserted into the circuit breaker, the positioning angle plate 48 corresponds exactly to the corner of the circuit breaker. A fixed cylinder 49 is provided on one side of the positioning angle plate 48, and the plug 50 is installed inside the fixed cylinder 49. Several floating parts 51 are connected to the fixed cylinder 49, and the other side of the floating parts 51 is connected to the outside of the plug 50. When the circuit breaker reaches the working position and is positioned by the positioning mechanism... 4. After the positioning and fixing are completed, the integrated interface on the circuit breaker is aligned with the plug 50 on the auxiliary table 46. At this time, the output end of the cylinder 47 corresponding to each station drives the positioning angle plate 48 and the plug 50 to move, so that the plug 50 can be plugged into the integrated interface of the circuit breaker. By automatically plugging in, the problem of misalignment, incomplete plugging, poor contact and other issues that are easy to occur during the mechanical life test of the traditional pole-mounted circuit breaker, which requires manual plugging of the plug 50, can be solved. This can lead to abnormal test signals, data distortion and test interruption. It can ensure that the plug is plugged in properly and has good contact during the test, and maintain the continuity of the test process.

[0062] A through groove is provided on one side of the positioning angle plate 48, and a locking rod 52 is provided in the through groove. A guide groove is provided in the locking rod 52, and a positioning pin is provided in the through groove. The positioning pin is located in the guide groove. A locking cover 53 is provided on the outside of the plug 50. A limit groove is provided on the outside of the plug 50. The locking cover 53 can rotate and move within a certain range in the limit groove of the plug 50. A ring block 54 is connected to the outside of the locking cover 53. The ring block 54 is installed in the locking rod 52. The outer side of the ring block 54 cooperates with the inside of the locking rod 52, so that the ring block 54 can rotate inside the locking rod 52. The movement of the locking rod 52 drives the ring block 54 to rotate and move. It should be noted that the integrated interface of the circuit breaker is threaded on the outside, and the inner side of the locking cover 53 is also provided with threads that are compatible with the threads of the integrated interface. When the plug 50 is connected to the integrated interface, the output end of the electric push rod 56 pushes the locking rod 52 to move. Specifically, the locking rod 52 moves within the through slot. Utilizing the cooperation of the guide slot and the positioning pin, the locking rod 52 can move in both forward / backward and left / right directions. This movement of the locking rod 52 also causes the ring block 54 to rotate and move, resulting in the locking cover 53 rotating and moving. When the locking cover 53 rotates, it can lock into the threaded interface of the integrated connector, thus providing a secondary lock to the plug 50. This further enhances the connection strength between the plug 50 and the integrated interface, preventing the plug 50 from loosening, experiencing poor contact, or even falling off due to vibrations during opening and closing, ensuring stable transmission of electrical signals and control commands during testing. Furthermore, the threaded locking forms a reliable anti-loosening structure, preventing connection failure under long-term vibration and ensuring continuous and reliable testing. Simultaneously, it provides protection and positioning for the plug 50, preventing damage to the interface during insertion / removal and testing, improving docking stability and the overall service life of the device.

[0063] In addition, a floating element 51 is provided between the plug 50 and the fixing cylinder 49 on the positioning angle plate 48. The adaptive floating adjustment during the docking process can compensate for slight position and angle offsets when docking with the circuit breaker interface, avoiding hard collision, eccentric force, misalignment or damage between the plug and the interface due to processing errors, assembly deviations or positioning deviations. At the same time, in the vibration environment of opening and closing, the floating element 51 can buffer the vibration impact. Because the plug 50 is plugged into the circuit breaker as a whole, the impact force of the circuit breaker during opening and closing will be transmitted to the plug 50. If the plug 50 is fixed on the positioning angle plate 48, this impact force will directly impact the connection between the plug 50 and the positioning angle plate 48, which can easily damage the plug 50. Therefore, the floating element 51 can also protect the plug 50 and prevent the impact force of opening and closing from damaging the plug 50.

[0064] A fixed base 55 is connected to one side of the positioning angle plate 48. An electric push rod 56 is connected to the fixed base 55. A connecting bracket 57 is connected to the output end of the electric push rod 56. An opening slot is opened on one side of the locking rod 52. The connecting bracket 57 is connected to the opening slot.

[0065] When using this invention:

[0066] First, test cabinet 1 is the core unit of the pole-mounted circuit breaker mechanical life testing system, responsible for control, drive, detection, and data management. It is electrically connected to the integrated interface of the pole-mounted circuit breaker via a dedicated connector and plug 50. Before testing, operators set parameters such as the number of mechanical life test cycles, opening and closing intervals, and action sequence on test cabinet 1. After the test begins, the control module inside test cabinet 1 outputs opening and closing drive signals according to a preset program, which are transmitted to the circuit breaker via the connector to control its opening and closing actions. During the circuit breaker's operation, test cabinet 1... The plug-in cable collects feedback information such as the status of auxiliary contacts, operating position signals, and operating time of the circuit breaker in real time to determine whether the opening and closing are in place and whether the operation is normal. At the same time, the test cabinet 1 counts, times, and judges the status of each operation. If abnormalities such as jamming, failure to operate, or false operation occur, it can automatically identify and shut down the protection. The test cabinet 1 records the number of operations, operation sequence, fault information, and other data throughout the process. After completing the specified number of mechanical life tests, it outputs the test results and judgment conclusions, thereby realizing the automated testing, monitoring, and performance evaluation of the mechanical life of the pole-mounted circuit breaker.

[0067] Next, the personnel place the pole-mounted circuit breaker on the test bench 2. Then, the traveling component 31 moves to the pole-mounted circuit breaker. It should be noted that the personnel do not need to precisely align the pole-mounted circuit breaker; simply ensuring its orientation is correct is sufficient. The traveling component 31 drives the slide table 32 to the pole-mounted circuit breaker. The output end of the electric push rod 35 retracts, and the adjusting plate 36 moves to below the pole-mounted circuit breaker (between the bases). The adjusting plate 36 also contains an electric cylinder, the output end of which is connected to the driving rack 37. The output end of the electric cylinder drives the driving rack 37 to move. Therefore, when the driving rack 37 moves, it drives two gears 38 to rotate. The two gears 38 drive two sets of driven racks 39 to move. The racks 39 are respectively set on the upper and lower sides of the active rack 37. The two sets of driven racks 39 move to the sides respectively, driving the two outer clamps 40 to move to the sides synchronously, thereby supporting the inner sides of the circuit breaker base. When the circuit breaker is aligned, the output ends of the four electric push rods 33 drive the L plate 34 to move, so that the four L plates 34 synchronously position the four corners of the circuit breaker, so that the circuit breaker is placed in the center on the test bench 2. At this time, the circuit breaker base is just located on the two rows of rolling balls on the test bench 2. Then, the traveling component 31 uses the outer clamps 40 and floating clamps 44 to support the circuit breaker, and the L plates 34 to position the four corners of the circuit breaker, to realize the movement of the circuit breaker and move the circuit breaker to the corresponding work position one by one.

[0068] Then, when the positioning block 6 descends and drives the pole-mounted circuit breaker base into the positioning slot, the positioning plate 13 will also move in a timely manner to clamp and position the circuit breaker base as the positioning block 6 descends. Specifically, when the positioning block 6 descends to a certain distance, it will drive the floating frame 8 to descend through the telescopic rod 7. When the floating frame 8 descends, the outer ball bearing 9 will roll into its corresponding several protruding frames 10. It should be noted that when the ball bearing 9 enters the protruding frame 10, it will push the protruding frame 10 open and move towards the circuit breaker base, so that the several protruding frames 10 drive the sliding rod 12 and the positioning plate 13 to move synchronously and clamp and position the four sides of the pole-mounted circuit breaker base simultaneously. After the pole-mounted circuit breaker is positioned and fixed, the contact clamping plate 29 on one side of two of the positioning plates 13 contacts the circuit breaker base for fixing. The other two positioning plates 13 have smooth surfaces. In this way, the two positioning plates 13 only position the circuit breaker base and maintain the relative movement of the circuit breaker base to avoid interfering with the normal energy absorption of the contact clamping plate 29.

[0069] Furthermore, the energy-absorbing block 16 is integrated with the contact clamp plate 29 via the positioning post 25. Thus, when the circuit breaker is positioned and fixed for testing, the internal operating mechanism of the pole-mounted circuit breaker will instantly release or store spring energy during opening and closing operations, causing rapid movement of components such as contacts and connecting rods. This generates instantaneous and severe mechanical impact and vibration. Therefore, to avoid the impact energy directly acting on the positioning and fixing structure, which would exacerbate positioning deviation and structural damage, the contact clamp plate 29 maintains a certain degree of mobility after the circuit breaker is positioned and fixed. That is, the vibration of the circuit breaker opening and closing is transmitted to the contact clamp plate 29. At this time, the contact clamp plate 29 drives the energy-absorbing block 16 to descend. The descent of the energy-absorbing block 16 along the guide post 15 will drive the energy-absorbing pressure rod 17 to descend within the energy-absorbing cylinder 20. Special attention is required. It should be noted that when the energy-absorbing pressure rod 17 descends, its external guide protrusion 18 will move in the guide groove 19 inside the energy-absorbing cylinder 20. Because the guide protrusion 18 is fixed by the energy-absorbing pressure rod 17, the guide protrusion 18 will remain vertically descending. Then the energy-absorbing cylinder 20 will be affected by the guide groove 19. When the energy-absorbing pressure rod 17 descends, the energy-absorbing cylinder 20 will rotate. When the energy-absorbing cylinder 20 rotates, it will rub against the friction ring 23. The friction ring 23 will hinder the rotation of the energy-absorbing cylinder 20. Therefore, the impact force of opening and closing the circuit breaker during the test is transmitted to the energy-absorbing block 16, the energy-absorbing pressure rod 17, and the energy-absorbing cylinder 20. After the energy-absorbing cylinder 20 rotates and cooperates with the friction ring 23, the impact force is converted into friction force for consumption, which greatly improves the stability of the test process and the reliability of the data.

[0070] Finally, after the circuit breaker arrives at the workstation and is positioned and fixed by the positioning mechanism 4, the integrated interface on the circuit breaker is aligned with the plug 50 on the auxiliary table 46. At this time, the output end of the cylinder 47 corresponding to each workstation drives the positioning angle plate 48 and the plug 50 to move, so that the plug 50 can be plugged into the integrated interface of the circuit breaker. By automatically plugging in, the problem of misalignment, incomplete plugging, poor contact and other issues that are prone to occur during the mechanical life test of traditional pole-mounted circuit breakers can be solved. This ensures that the plug is plugged in properly and has good contact during the test, and maintains the continuity of the test process.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical life testing device for pole-mounted circuit breakers, comprising a test bench (2) and a test cabinet (1) disposed on one side of the test bench (2), characterized in that: The test bench (2) is equipped with an automatic docking mechanism (30), and several circuit breaker bodies (3) are placed on the test bench (2). A support is installed at the bottom of the test bench (2), and a positioning mechanism (4) is installed at the top of the support. Several positioning slots are opened on the test bench (2). The positioning mechanism (4) includes a connecting plate (5), one side of which is connected to a positioning block (6), which is disposed in a positioning groove. One side of the circuit breaker body (3) is disposed in the positioning groove. One side of the connecting plate (5) is connected to a telescopic rod (7), one end of which is connected to a floating frame (8). The floating frame (8) is disposed in the test bench (2), and several balls (9) are connected to the floating frame (8). Four positioning plates (13) are disposed in the positioning groove. Two sliding rods (12) are connected to each side. One end of each sliding rod (12) is connected to an extension frame (10) and a retraction frame (11). The extension frame (10) and the retraction frame (11) are respectively set on the upper and lower sides of the floating frame (8). After the pole-mounted circuit breaker is transferred to the work station, the positioning block (6) sinks down and drives the base of the pole-mounted circuit breaker to descend into the positioning groove of the test bench (2). When it sinks into the positioning groove, the floating frame (8) drives the extension frame (10) to move, so that the positioning plate (13) positions and fixes the base of the circuit breaker body (3). One side of each of the two positioning plates (13) has an energy-absorbing groove (14), and two guide posts (15) are connected in the energy-absorbing groove (14). An energy-absorbing block (16) is provided on the guide post (15), and an energy-absorbing pressure rod (17) is connected to the bottom of the energy-absorbing block (16). A base frame (21) is connected in the energy-absorbing groove (14), and an energy-absorbing cylinder (20) is rotatably connected to the base frame (21). The energy-absorbing pressure rod (17) and the energy-absorbing cylinder (20) are both sleeved on the outside of the guide post (15). A guide groove (19) is provided on the inner wall of the energy-absorbing cylinder (20), and a guide protrusion (18) is connected to the outside of the energy-absorbing pressure rod (17). The guide protrusion (18) is set in the guide groove (19). A fixing rod (22) is connected in the base frame (21). A friction ring (23) is connected to one side of the energy-absorbing cylinder (20). The friction ring (23) is located outside the energy-absorbing cylinder (20). A micro electric cylinder is provided in the positioning plate (13). The output end of the micro electric cylinder is connected to one end of the fixing rod (22). A return spring (24) is installed in the energy-absorbing groove (14). The return spring (24) is sleeved outside the guide post (15). One end of the return spring (24) is connected to one end of the energy-absorbing block (16). A positioning post (25) is connected to one side of each of the two energy-absorbing blocks (16). A contact clamp plate (29) is connected to one side of the positioning post (25). A driven plate (26) is connected to the outside of the positioning post (25). A stop tongue (27) is connected to the outside of the two driven plates (26). A stop post (28) is connected to one side of the energy-absorbing groove (14). After the pole-mounted circuit breaker is positioned and fixed in the positioning slot, the contact clamps (29) on one side of two of the positioning plates (13) contact the circuit breaker base for fixing. The other two positioning plates (13) have smooth surfaces and only position the circuit breaker base and maintain the relative movement of the circuit breaker base to avoid interfering with the normal energy absorption of the contact clamps (29).

2. The pole-mounted circuit breaker mechanical life testing device according to claim 1, characterized in that: The automatic docking mechanism (30) includes two walking components (31). The walking components (31) are set in the test platform (2). The top of the walking components (31) is connected to a slide (32). Two electric push rods (33) are connected to one side of the slide (32). The output end of the electric push rod (33) is connected to an L plate (34). The side of the slide (32) is connected to an electric push rod (35). The output end of the electric push rod (35) is connected to an adjustment plate (36). The adjustment plate (36) has a sliding groove inside. The sliding groove is provided with an active rack (37), two gears (38), and four driven racks (39).

3. The mechanical life testing device for pole-mounted circuit breakers according to claim 2, characterized in that: Two of the driven racks (39) are positioned above the driving rack (37), and the other two driven racks (39) are positioned below the driving rack (37). The driving rack (37) is connected to the middle of the gear (38), and the upper and lower sides of the gear (38) are connected to the driven racks (39) respectively. The driving rack (37) moves in the groove to drive the two gears (38) to rotate for transmission. One end of each of the four driven racks (39) is connected to two outer clamps (40).

4. The pole-mounted circuit breaker mechanical life testing device according to claim 3, characterized in that: Each of the two outer clamping plates (40) is connected to a sleeve (41) on one side. A sleeve rod (42) is connected in the sleeve (41). A floating clamping plate (44) is connected to one side of the sleeve rod (42). Several floating springs (43) are connected between the floating clamping plate (44) and the outer clamping plate (40). Several universal balls (45) are connected to one side of the floating clamping plate (44).

5. The pole-mounted circuit breaker mechanical life testing device according to claim 4, characterized in that: An auxiliary platform (46) is connected to the test platform (2). The auxiliary platform (46) assists the walking component (31) in its operation. A cylinder (47) is installed on the auxiliary platform (46). The output end of the cylinder (47) is connected to a positioning angle plate (48). A fixed cylinder (49) is provided on one side of the positioning angle plate (48). A plug (50) is provided in the fixed cylinder (49). Several floating parts (51) are connected in the fixed cylinder (49). The other side of the floating parts (51) is connected to the outside of the plug (50).

6. The mechanical life testing device for a pole-mounted circuit breaker according to claim 5, characterized in that: A through groove is provided on one side of the positioning angle plate (48), and a locking rod (52) is provided in the through groove. A guide groove is provided in the locking rod (52), and a positioning pin is provided in the through groove. The positioning pin is provided in the guide groove. A locking cover (53) is provided on the outside of the plug (50). A ring block (54) is connected to the outside of the locking cover (53). The ring block (54) is installed in the locking rod (52). The movement of the locking rod (52) drives the ring block (54) to rotate.

7. The pole-mounted circuit breaker mechanical life testing device according to claim 6, characterized in that: A fixed seat (55) is connected to one side of the positioning angle plate (48), and an electric push rod three (56) is connected in the fixed seat (55). The output end of the electric push rod three (56) is connected to a connecting frame (57). An opening slot is provided on one side of the locking rod (52), and the connecting frame (57) is connected to the opening slot.

8. A method for testing the mechanical life of a pole-mounted circuit breaker, characterized in that: Using the pole-mounted circuit breaker mechanical life testing device according to claim 7 includes the following steps: S1. First, the personnel move the pole-mounted circuit breaker to the test bench (2), and use the automatic docking mechanism (30) to position and straighten the pole-mounted circuit breaker. Then, the straightened pole-mounted circuit breaker is transferred to the corresponding work station. Repeating this operation can position multiple pole-mounted circuit breakers and perform multi-work station testing. S2. After the pole-mounted circuit breaker reaches the designated work position, the base of the pole-mounted circuit breaker will be positioned in the positioning slot. At this time, the positioning block (6) of the positioning mechanism (4) descends in the positioning slot, driving the base of the pole-mounted circuit breaker to be positioned in the positioning slot. S3. At the same time, the four positioning plates (13) of the positioning mechanism (4) position and fix the base of the pole-mounted circuit breaker. When the pole-mounted circuit breaker is tested for mechanical life, the positioning plates (13) will also buffer and absorb the vibration through the contact clamp plate (29) in conjunction with the energy absorption block (16) while keeping the base in a fixed position. S4. After the pole-mounted circuit breaker is positioned and fixed at the work station, the cylinder (47) of the automatic docking mechanism (30) drives the positioning angle plate (48) and plug (50) to connect with the interface of the pole-mounted circuit breaker. Then, the locking cover (53) is automatically locked to the interface. Finally, the mechanical life test of the pole-mounted circuit breaker is controlled by the test cabinet (1).

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