Molded case circuit breaker tripping test auxiliary device and test method
By designing a plastic case circuit breaker trip test auxiliary device including electric push rod and handle drive assembly, the problem of operators repeatedly back and forth during the test is solved, automatic switching of circuit breaker status is realized, and test efficiency is improved.
Patent Information
- Application Number
- CN202411725530.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-02-14
AI Technical Summary
In the tripping test of plastic case circuit breaker, the operator needs to repeatedly go back and forth between the test device and the test sample, which is cumbersome and wastes time.
Design a test auxiliary device for tripping of plastic shell circuit breakers, including test brackets and auxiliary mechanisms. The auxiliary mechanism includes electric push rods, lift support plates, tension sensors and handle driving components. The electric push rod drives the handle driving components to achieve plastic shell circuit breaking. Automatic switching of the device handle in the closing, opening and tripping positions.
It reduces the participation of operators, saves time and effort, realizes automatic switching of different states of plastic shell circuit breakers, and improves test efficiency.
Smart Images
Figure CN119438890A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of molded case circuit breaker tripping test, and in particular to a molded case circuit breaker tripping test auxiliary device and a test method. Background Art
[0002] When the molded case circuit breaker is undergoing a tripping test, it is often necessary to manually reset the circuit breaker and then close it before the next test can be performed. For safety reasons, due to the large current in the test itself, the test position is usually far away from the operator's position, resulting in the need for the operator to repeatedly go back and forth between the test device and the test product during the test process, which is cumbersome and time-consuming. Summary of the invention
[0003] In order to overcome the deficiencies in the prior art, the present invention provides a molded case circuit breaker tripping test auxiliary device and test method, which have the advantage of reducing operator participation.
[0004] In order to achieve the above object, the present invention adopts the following technical solution:
[0005] A molded case circuit breaker tripping test auxiliary device comprises a test bracket and an auxiliary mechanism; the test bracket is used to connect the molded case circuit breaker and the auxiliary mechanism; the auxiliary mechanism comprises an electric push rod, a lifting support plate, a tension sensor and a handle drive assembly; the electric push rod drives the lifting support plate to rise and fall; the handle drive assembly, the tension sensor and the lifting support plate are distributed from top to bottom and the handle drive assembly and the lifting support plate are respectively connected to two ends of the tension sensor; the handle drive assembly is used to push the handle of the molded case circuit breaker to switch between closing, opening and tripping positions.
[0006] By adopting the above technical solution, the electric push rod drives the lifting support plate and the handle drive assembly to lift vertically. During this process, the handle of the molded case circuit breaker is switched between the closing, opening and tripping positions, thereby realizing the switching of different states of the molded case circuit breaker in the tripping test, thereby reducing the participation of operators and eliminating the need for operators to repeatedly go back and forth between the test device and the test product, saving time and effort.
[0007] Optionally, the handle driving assembly includes a pair of handle driving members distributed up and down; the handle of the molded case circuit breaker is located between the pair of handle driving members; and the handle driving assembly pushes the handle of the molded case circuit breaker during the process.
[0008] By adopting the above technical solution, during the rising process of the handle driving assembly, the handle driving component on the lower side pushes the handle of the molded case circuit breaker to swing upward, so that the molded case circuit breaker changes from the open state to the closed state; during the descending process of the handle driving assembly, the handle driving component on the upper side pushes the handle of the molded case circuit breaker to swing downward, so that the molded case circuit breaker changes from the closed state to the open state. In this way, the state switching can be realized without connecting the handle of the molded case circuit breaker and the auxiliary mechanism, and it can adapt to different molded case circuit breakers.
[0009] Optionally, the handle driving member includes a horizontally arranged handle driving rod.
[0010] By adopting the above technical solution, the handle of the molded case circuit breaker can be pushed by moving the handle driving rod up and down, and the structure is simple.
[0011] Optionally, the handle drive rod is sleeved with a plurality of rotating parts which are closely distributed axially; the handle drive rod is detachably connected; and the rotating parts have a plurality of different outer diameter specifications to adapt to different molded case circuit breakers.
[0012] By adopting the above technical solution, when the molded case circuit breaker is different, the handle position and length of the molded case circuit breaker will also be different, so the handle drive rod and the rotating part can be removed and replaced with a rotating part suitable for the outer diameter, which is more adaptable.
[0013] Optionally, a vertically arranged lifting guide rod is arranged on the bottom surface of the lifting support plate; and the lifting guide rod is vertically slidably arranged on the test bracket.
[0014] By adopting the above technical solution, the lifting guide rod and the vertical sliding setting of the test bracket play a vertical guiding role, making the movement direction of the lifting support plate, the tension sensor and the handle drive assembly more accurate, thereby ensuring the smooth progress of the test and improving the accuracy of force detection.
[0015] Optionally, it also includes a servo controller, a PLC control module, an AD acquisition module and a touch screen; the AD acquisition module is electrically connected to the tension sensor and the PLC control module respectively; the servo controller is electrically connected to the servo motor of the electric push rod and the PLC control module respectively; the touch screen is electrically connected to the PLC control module and is used to input instructions.
[0016] By adopting the above technical solution, the test program can be pre-set, and the corresponding test mode can be selected for testing during use, which makes the test operation more convenient.
[0017] A molded case circuit breaker tripping test method, using the above-mentioned molded case circuit breaker tripping test auxiliary device; characterized in that it comprises the following steps:
[0018] Step S001, installing a molded case circuit breaker;
[0019] Step S002, inputting test parameters through the touch screen;
[0020] Step S003, applying a test current source to trip the molded case circuit breaker;
[0021] Step S004, the electric push rod drives the handle driving assembly to descend, thereby pushing the handle of the molded case circuit breaker to switch to the opening position;
[0022] In step S005, the electric push rod drives the handle driving assembly to rise, thereby pushing the handle of the molded case circuit breaker to switch to the closing position to perform step S003.
[0023] By adopting the above technical solution, the state switching of the molded case circuit breaker is replaced by manual operation through the actuation of the electric push rod, which saves time and labor.
[0024] Optionally, in step S004 and step S005, whether the switch is in place is determined by the force value detected by the tension sensor; when the force value reaches a set value, the electric push rod stops working.
[0025] By adopting the above technical solution, the force value is used to determine whether the switch is in place to control the electric push rod, so that even different molded case circuit breakers can be tested by the same electric push rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural schematic diagram of the present invention.
[0027] Figure 2 It is a structural schematic diagram of the auxiliary mechanism of the present invention.
[0028] Figure 3 It is a schematic diagram of the control part of the present invention.
[0029] Figure 4 Schematic diagram of the tripping test of the present invention.
[0030] Figure 5 is a schematic diagram of the test method of the present invention.
[0031] Description of reference numerals:
[0032] 10. Test bracket;
[0033] 20. Molded case circuit breaker;
[0034] 30. Auxiliary mechanism; 31. Electric push rod; 32. Lifting support plate; 33. Lifting guide rod; 34. Tension sensor; 35. Handle drive support plate; 37. Handle drive rod; 38. Rotating part. DETAILED DESCRIPTION
[0035] The following is combined with Figure 1-3 The present invention is described in further detail.
[0036] Embodiment 1: A molded case circuit breaker tripping test auxiliary device is disclosed, referring to Figure 1 , including a test bracket 10 and an auxiliary mechanism 30; the auxiliary mechanism 30 is connected to the test bracket 10; the molded case circuit breaker 20 is fixed to the test bracket 10 by bolts. The handle of the molded case circuit breaker corresponds to three positions, the uppermost closing position, the middle tripping position, and the lowermost opening position; the test process of the molded case circuit breaker 20 is as follows Figure 4 When the molded case circuit breaker 20 is closed, the handle of the molded case circuit breaker 20 is in the closed position, and then a tripping test is performed to switch the molded case circuit breaker 20 from closed to tripped. At this time, the handle of the molded case circuit breaker 20 is in the tripping position, and then the auxiliary mechanism 30 pushes the handle of the molded case circuit breaker 20 from the tripping position to the opening position, that is, the molded case circuit breaker 20 is switched to the opening position, and then the auxiliary mechanism 30 pushes the handle of the molded case circuit breaker 20 from the opening position to the closing position, that is, the molded case circuit breaker 20 is switched to the closing position, and the next tripping test is performed in this way, which does not require manual participation, saving time and effort.
[0037] refer to Figure 2 The auxiliary mechanism 30 includes an electric push rod 31 fixed on the test bracket 10, a lifting support plate 32 fixed on the upper end of the push rod of the electric push rod 31, a tension sensor 34 connected to the lifting support plate 32, and a handle driving assembly fixed on the upper end of the tension sensor 34; the handle driving assembly includes a handle driving support plate 35 and a pair of handle driving members distributed up and down and fixed on the vertical end surface of the handle driving support plate 35 close to the test bracket 10; the handle driving support plate 35 and the lifting support plate 32 are respectively connected to the force-bearing connection ends on both sides of the tension sensor 34; when working, the handle of the molded case circuit breaker 20 installed on the test bracket 10 is located between the pair of handle driving members, when the handle driving assembly moves up, the handle driving member on the lower side drives the handle of the molded case circuit breaker 20 to swing up, that is, switch from the opening state to the closing state; when the handle driving assembly moves down, the handle driving member on the upper side drives the handle of the molded case circuit breaker 20 to swing down, that is, switch from the tripping position state to the opening position state.
[0038] refer to Figure 1 and Figure 2 In order to improve the movement accuracy of the handle driving assembly in the vertical lifting direction, a lifting guide rod 33 arranged in the vertical direction is fixed on the lower end surface of the lifting support plate 32; the lifting guide rod 33 is vertically slidably arranged on the test bracket 10; in order to reduce the sliding friction, a shaft sleeve for the lifting guide rod 33 to vertically pass through is fixed on the test bracket 10.
[0039] refer to Figure 2 A pair of connecting seats distributed up and down are fixed on the handle driving support plate 35; the connecting seat has a pair of horizontally distributed vertical connecting plates; the handle driving member includes a cylindrical handle driving rod 37; a mounting hole for horizontal insertion of the handle driving rod 37 is formed on the vertical connecting plate; for installation stability, the handle driving rod 37 is interference fit with the mounting hole; in normal state, the two ends of the handle driving rod 37 horizontally pass through the mounting holes of a pair of vertical connecting plates.
[0040] In order to adapt to the handles of different molded case circuit breakers 20, a plurality of axially closely distributed rotating parts 38 are sleeved on the handle driving rod 37, and all the rotating parts 38 are located between a pair of vertical connecting plates of the connecting seat; at the same time, the rotating parts 38 have a variety of different outer diameter specifications to adapt to different molded case circuit breakers 20, so that molded case circuit breakers 20 of the same size use rotating parts 38 of the same outer diameter specification, and molded case circuit breakers 20 of another size use rotating parts 38 of another same outer diameter specification; the rotating part 38 can be a bearing, and the inner ring of the rotating part 38 is connected to the handle driving rod 37, and the rotating part 38 can also be just a circular ring.
[0041] In order to improve the automation level of auxiliary devices, refer to Figure 3 The auxiliary device also includes a servo controller, a PLC control module, an AD acquisition module and a touch screen; the AD acquisition module is electrically connected to the tension sensor 34 and the PLC control module respectively; the servo controller is electrically connected to the servo motor of the electric push rod 31 and the PLC control module respectively; the touch screen is electrically connected to the PLC control module and is used to input instructions; wherein the PLC control module is responsible for processing input signals and touch screen control commands, and outputs signals according to logic control; the AD acquisition module is used to convert the voltage signal output by the tension sensor into a PLC digital signal; the servo controller is used to control the servo motor of the electric push rod 31, and controls the servo motor of the electric push rod 31 in three ways: position, speed and torque, to achieve high-precision positioning of the transmission system.
[0042] Embodiment 2: A method for testing the tripping of a molded case circuit breaker, referring to Figure 5 , using the molded case circuit breaker tripping test auxiliary device of embodiment 1; comprising the following steps:
[0043] Step S001, installing the molded case circuit breaker 20: fixing the molded case circuit breaker 20 to be tested on the test bracket 10 by bolts and making the handle of the molded case circuit breaker 20 be located between a pair of handle driving members;
[0044] Step S002, inputting test parameters through the touch screen, the test parameters including the opening force value, the closing force value, and the action time of the electric push rod;
[0045] Step S003, applying a test current source to perform a tripping test: short-circuiting the test route, so that the molded case circuit breaker 20 changes from a closed state to a tripped state, and the handle of the molded case circuit breaker 20 changes from a closed position to a tripped position;
[0046] Step S004, opening: the electric push rod 31 drives the handle driving assembly to descend. During this process, the handle driving component on the upper side pushes the handle of the molded case circuit breaker 20 to switch from the tripping position to the opening position, so that the molded case circuit breaker 20 switches to the opening state; in this step, the force value detected by the tension sensor 34 is used to determine whether the switch is in place; when the force value reaches the set value, the electric push rod 31 stops working.
[0047] Step S005, closing the circuit breaker: the electric push rod 31 drives the handle drive assembly to rise. During this process, the handle drive component on the lower side pushes the handle of the molded case circuit breaker 20 to switch from the open position to the closed position, so that the molded case circuit breaker 20 switches to the closed state to perform step S003; in this step, the force value detected by the tension sensor 34 is used to determine whether the switch is in place; when the force value reaches the set value, the electric push rod 31 stops working.
[0048] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A molded case circuit breaker tripping test auxiliary device, characterized in that: The invention comprises a test bracket (10) and an auxiliary mechanism (30); the test bracket (10) is used to connect a molded case circuit breaker (20) and the auxiliary mechanism (30); the auxiliary mechanism (30) comprises an electric push rod (31), a lifting support plate (32), a tension sensor (34) and a handle drive assembly; the electric push rod (31) drives the lifting support plate (32) to rise and fall; the handle drive assembly, the tension sensor (34) and the lifting support plate (32) are arranged from top to bottom and the handle drive assembly and the lifting support plate (32) are respectively connected to two ends of the tension sensor (34); the handle drive assembly is used to push the handle of the molded case circuit breaker (20) to switch between the closing, opening and tripping positions.
2. A molded case circuit breaker tripping test auxiliary device according to claim 1, characterized in that: The handle driving assembly comprises a pair of handle driving members distributed up and down; the handle of the molded case circuit breaker (20) is located between the pair of handle driving members; and the handle driving assembly pushes the handle of the molded case circuit breaker (20) during the process.
3. A molded case circuit breaker tripping test auxiliary device according to claim 2, characterized in that: The handle driving member comprises a handle driving rod (37) arranged horizontally.
4. A molded case circuit breaker tripping test auxiliary device according to claim 3, characterized in that: The handle driving rod (37) is sleeved with a plurality of rotating parts (38) which are closely distributed in the axial direction; the handle driving rod (37) is detachably connected; and the rotating parts (38) have a plurality of different outer diameter specifications to adapt to different molded case circuit breakers (20).
5. The tripping test auxiliary device for molded case circuit breaker according to claim 1, characterized in that: A vertically arranged lifting guide rod (33) is arranged on the bottom surface of the lifting support plate (32); the lifting guide rod (33) is vertically slidably arranged on the test bracket (10).
6. A molded case circuit breaker tripping test auxiliary device according to any one of claims 1 to 5, characterized in that: It also includes a servo controller, a PLC control module, an AD acquisition module and a touch screen; the AD acquisition module is electrically connected to the tension sensor (34) and the PLC control module respectively; the servo controller is electrically connected to the servo motor of the electric push rod (31) and the PLC control module respectively; the touch screen is electrically connected to the PLC control module and is used to input instructions.
7. A molded case circuit breaker tripping test method, using the molded case circuit breaker tripping test auxiliary device according to claim 6; characterized in that: The steps include: Step S001, installing a molded case circuit breaker (20); Step S002, inputting test parameters through the touch screen; Step S003, applying a test current source to perform a trip test; Step S004, opening: the electric push rod (31) drives the handle driving assembly to descend, thereby pushing the handle of the molded case circuit breaker (20) to switch to the opening position; Step S005, closing the circuit breaker: the electric push rod (31) drives the handle driving assembly to rise, thereby pushing the handle of the molded case circuit breaker (20) to switch to the closing position, so as to proceed to step S003.
8. A molded case circuit breaker tripping test method according to claim 7, characterized in that: In step S004 and step S005, whether the switch is in place is determined by the force value detected by the tension sensor (34); when the force value reaches the set value, the electric push rod (31) stops working.