Half shaft straightness online detection device and method of vacuum circuit breaker operating mechanism

Abstract

The invention discloses a semi-shaft straightness online detection device and method for a vacuum circuit breaker operating mechanism, a T-shaped base is arranged right below a semi-shaft to be detected, the end part of the T-shaped base is provided with a clamping mechanism, the top of a transverse bottom plate is provided with a detection mechanism, the detection mechanism comprises an end plate A and an end plate B, a slide rail is laid at the bottom between the end plate A and the end plate B, and a screw rod is installed at the top between the end plate A and the end plate B; the detection mechanism further comprises an infrared distance meter used for scanning the to-be-detected half shaft. A speed reducer is fixedly mounted on the outer side surface of the end plate B and connected with a stepping motor to jointly drive a lead screw to rotate; according to the invention, through combination of an innovative mechanical structure and an automatic detection technology, rapid and accurate on-line measurement of the straightness of the half shaft is realized. The device adopts the T-shaped base and the height-adjustable clamping mechanism, so that the clamping stability and the adaptability to half shafts of different specifications are ensured. An infrared distance meter and a precise lead screw sliding table driven by a stepping motor are integrated, and automatic scanning and high-frequency data acquisition of the surface of the half shaft are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the operating mechanism of vacuum circuit breaker, especially to the straightness on-line detection device and method of the half shaft of the operating mechanism of vacuum circuit breaker. BACKGROUND

[0002] The vacuum circuit breaker is the core component of the high-voltage switch cabinet matched with the control part in the high-voltage power transmission and distribution network. In addition to the function of breaking current, the vacuum circuit breaker has various anti-misoperation and over-current protection functions in use, so its operating condition plays a key role in the transmission quality of the power grid. In the operating mechanism of the vacuum circuit breaker, each unit purchased is independently installed in the frame, and is connected to the main shaft installed on the frame through the output crank of the operating mechanism to drive the contact movement of the main circuit. In the prior art, the opening tripping of the high-voltage vacuum circuit breaker is all based on the half shaft tripping principle, that is, after the operating mechanism receives the opening signal, the opening top plate drives the opening half shaft to rotate clockwise under the action of the tripping force F, the constraint of the half shaft to the clamping plate is released, the opening tripping part rotates clockwise under the action of the spring force, and the opening operation is completed under the driving of the connecting rod mechanism. This tripping mode has many transmission links and many components, and long-term operation will cause deformation of the opening top plate, wear of the clamping part of the half shaft and the clamping plate, which will cause unreliable operation of the mechanism and affect the reliability and service life of the mechanism.

[0003] Therefore, it is necessary to detect the straightness of the half shaft in the operating mechanism, and the straightness on-line detection device and method of the half shaft of the operating mechanism of the vacuum circuit breaker are proposed to prevent mechanical overall operation failure by finding the change of the straightness of the half shaft in time. SUMMARY

[0004] In order to solve the above problems existing in the prior art, the present application provides a straightness on-line detection device and method of the half shaft of the operating mechanism of the vacuum circuit breaker.

[0005] The technical scheme of the present application is as follows:

[0006] The application discloses a straightness on-line detection device for a half shaft of a vacuum circuit breaker operating mechanism.

[0007] Preferably, the top clamp in the clamping mechanism comprises a left clamp plate and a right clamp plate which are symmetrical and provided with semicircular grooves, the bottom of the left clamp plate and the right clamp plate are fixedly installed with fixed pins, a strip-shaped sliding groove is formed in the wall surface of the fixed box for adapting the fixed pins, and a spring is connected between the two fixed pins; an open slot is formed in the top of the fixed box for the opening and closing movement of the left clamp plate and the right clamp plate; the bottom end surface of the left clamp plate and the right clamp plate is hingedly connected with a connecting rod, and the other end of the connecting rod is hingedly connected with the top end of a push rod.

[0008] Preferably, the bottom end of the push rod is provided with a handle.

[0009] Preferably, a locking box is sleeved on the push rod, the locking box is fixedly installed at the long handle end of the L-shaped long handle-shaped fixed hanging plate, a locking bolt is threadedly connected with the side wall of the locking box, and the locking bolt can be tightly pressed and fixed to the push rod, so as to lock the opening and closing state of the top clamp.

[0010] Preferably, the T-shaped base further comprises a longitudinal support which is fixedly installed at the middle bottom of the horizontal bottom plate, and the bottom of the longitudinal support is provided with a mounting flange, and the whole device can be fixed on a workbench or a special tool through bolts.

[0011] Preferably, a long strip-shaped mounting hole is formed in the long handle of the fixed hanging plate, the mounting hole is a strip-shaped hole, and the mounting hole is used for adjusting the height of the whole clamping mechanism relative to the T-shaped base through the connection of the bolt and the back of the fixed box.

[0012] Preferably, the detection mechanism further comprises a control system, the control system comprises a PLC controller, a motor driver and a man-machine interaction interface; the PLC controller is electrically connected with the stepping motor, and is used for controlling the start-stop, rotating speed and rotating direction of the stepping motor; the PLC controller is electrically connected with the infrared distance meter, and is used for receiving and processing the measurement data of the infrared distance meter; and the man-machine interaction interface is used for inputting instructions and displaying measurement results.

[0013] The detection method of the half shaft straightness on-line detection device of a vacuum circuit breaker operating mechanism comprises the following steps:

[0014] S1, installation and calibration of the device: the device is stably installed on the working platform through the mounting flange at the bottom of the T-shaped base; then initial calibration is performed, that is, a standard shaft with known straightness is clamped in the clamping mechanism instead of the half shaft to be measured, the infrared distance meter is controlled to scan along the whole length of the standard shaft, a series of reference distance data are recorded, and the data are stored in the control system as calibration reference;

[0015] S2, clamping of the half shaft to be measured: first, in order to loosen the clamping mechanism, the locking bolt on the locking box is counterclockwise loosened, the handle at the end of the push rod is pushed upward, the push rod is pushed upward, and the left and right clamping plates are forced to open to both sides by the linkage mechanism against the pulling force of the spring; then, the half shaft to be measured is placed between the left and right clamping plates; the handle is pulled downward, the push rod is moved downward, and the semicircular grooves of the left and right clamping plates stably hold the half shaft to be measured under the rebound force of the spring; then, the locking bolt is tightened to completely lock the position of the push rod, so that the clamping state is stable and reliable during detection;

[0016] S3, automatic scanning and data acquisition: first, the detection program is started through the man-machine interface, the PLC control system sends instructions, the stepper motor drives the lead screw to rotate at a constant speed through the reducer, the sliding seat installed with the infrared distance meter moves at a constant speed along the slide rail from one end of the half shaft to the other end, and the system automatically displays the measurement results on the man-machine interface after detection, including the specific value of the straightness error and the data curve; the system compares the error value with the preset qualified threshold value, directly gives the determination conclusion of "qualified" or "unqualified", and can give an audible and visual prompt;

[0017] S4, disassembly of the half shaft: after detection, the unqualified half shaft is taken out and replaced by loosening the locking bolt, pulling down and pushing up the handle to open the clamping plate.

[0018] The present application has the following beneficial effects: the present application realizes rapid and accurate on-line measurement of the straightness of the half shaft by combining innovative mechanical structure and automatic detection technology. The device adopts a T-shaped base and an adjustable height clamping mechanism to ensure the stability of clamping and the adaptability to different specifications of half shafts. The integrated infrared distance meter and the precision lead screw sliding table driven by the stepper motor realize automatic scanning and high-frequency data acquisition of the surface of the half shaft, and completely eliminate the subjective error in manual measurement. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a schematic diagram of the overall assembly structure of the present application; Fig. 2 It is a schematic diagram of the clamping mechanism structure of the present application.

[0020] The reference numerals in the figure are as follows:

[0021] 1. T-shaped base; 101. Horizontal base plate; 102. Longitudinal support column; 2. Clamping mechanism; 201. Left clamping plate; 202. Right clamping plate; 203. Fixing box; 204. Push rod; 205. Connecting rod; 206. Strip groove; 207. Fixing pin; 208. Locking bolt; 209. Spring; 210. Locking box; 211. Handle; 3. Half shaft to be tested; 4. Fixing hanging plate; 5. Detection mechanism; 501. Infrared rangefinder; 502. End plate A; 503. End plate B; 504. Slide rail; 505. Lead screw; 506. Slide seat; 507. Reducer; 508. Stepper motor. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] See Figs. 1-2 An online detection device for the straightness of the half-shaft of a vacuum circuit breaker operating mechanism includes a half-shaft 3 to be tested, a T-shaped base 1, and a fixed mounting plate 4. The T-shaped base 1 is located directly below the half-shaft 3 to be tested, and a clamping mechanism 2 is provided at the end of the T-shaped base 1. The half-shaft 3 to be tested is clamped by the clamp on the top of the clamping mechanism 2 for coordinated operation. The clamping mechanism 2 also includes a fixed box 203. The back of the fixed box 203 is fixedly installed on the end of the transverse base plate 101 of the T-shaped base plate 1 by an L-shaped long-handled fixed mounting plate 4. A detection mechanism 5 is provided on the top of the transverse base plate 101. The detection mechanism 5 includes a fixed mounting plate 4. End plates A502 and B503 are fixedly installed at both ends of the horizontal base plate 101. A slide rail 504 is laid at the bottom between end plates A502 and B503, and a lead screw 505 is installed at the top. The detection mechanism 5 also includes an infrared rangefinder 501 for scanning the half shaft 3 to be measured. The infrared rangefinder 501 is fixedly installed on a slide block 506. The slide block 506 is threadedly connected to the lead screw 505 and makes linear reciprocating motion on the slide rail 504. A reducer 507 is fixedly installed on the outer side of the end plate B503. The reducer 507 is connected to a stepper motor 508 to drive the lead screw 505 to rotate.

[0024] Furthermore, the top clamp in the clamping mechanism 2 includes a symmetrical left clamping plate 201 and a right clamping plate 202 with semi-circular grooves. The bottom of the left clamping plate 201 and the right clamping plate 202 are fixedly installed with fixing pins 207. A strip-shaped sliding groove 206 is opened on the wall of the fixing box 203 to accommodate the fixing pins 207, and a spring 209 is connected between the two fixing pins 207. An open groove is opened on the top of the fixing box 203 for the opening and closing movement of the left clamping plate 201 and the right clamping plate 202. The bottom end faces of the left clamping plate 201 and the right clamping plate 202 are hinged with connecting rods 205, and the other end of the connecting rods 2054 is hinged to the top end of the push rod 204.

[0025] Furthermore, the bottom end of the push rod 204 is provided with a handle 211.

[0026] Furthermore, a locking box 210 is fitted onto the push rod 204. The locking box 210 is fixedly installed on the long handle end of the fixed hanging plate 4 with an L-shaped long handle. The side wall of the locking box 210 is threaded with a locking bolt 208. Tightening the locking bolt 208 can abut and fix the push rod 204, thereby locking the opening and closing state of the top clamp.

[0027] Furthermore, the T-shaped base 1 also includes a longitudinal support column 102, which is fixedly installed at the bottom center of the transverse base plate 101. The bottom of the longitudinal support column 102 is provided with a mounting flange, and the entire device can be fixed to the workbench or a specific tooling by bolts.

[0028] Furthermore, the long handle of the fixed mounting plate 4 is provided with an elongated mounting hole, which is connected to the back of the fixed box 203 by bolts. The mounting hole is a strip-shaped hole, which is used to adjust the height of the entire clamping mechanism 2 relative to the T-shaped base 1.

[0029] Furthermore, the testing mechanism 5 also includes a control system, which includes a PLC controller, a motor driver, and a human-machine interface; the PLC controller is electrically connected to the stepper motor 508 to control its start, stop, speed, and direction; the PLC controller is electrically connected to the infrared rangefinder 501 to receive and process its measurement data; the human-machine interface is used to input commands and display measurement results.

[0030] The detection method for the online detection device of the straightness of the half-shaft of the operating mechanism of a vacuum circuit breaker includes the following steps:

[0031] S1. Installation and calibration of the device: Securely install the device on the work platform via the mounting flange at the bottom of the T-base 1; then perform initial calibration, i.e., use a standard axis with known straightness compliance to replace the half-axis to be measured 3 and clamp it in the clamping mechanism 2, control the infrared rangefinder 501 to scan along the full length of the standard axis, record a series of reference distance data, and store this data in the control system as a calibration reference.

[0032] S2. Clamping the half-shaft to be tested: First, in order to loosen the clamping mechanism, loosen the locking bolt 208 on the locking box 210 counterclockwise, push the handle 211 at the end of the push rod 204 upward, push the push rod 204 upward, and through the linkage 205 mechanism, force the left clamping plate 201 and the right clamping plate 202 to open to both sides against the tension of the spring 209; then, place the half-shaft to be tested 3 between the left clamping plate 201 and the right clamping plate 202; pull the handle 211 downward, so that the push rod 204 moves down, and under the action of the spring 209, the semi-circular grooves of the left clamping plate 201 and the right clamping plate 202 will smoothly hold the half-shaft to be tested 3. Then, tighten the locking bolt 208 to completely lock the position of the push rod 204, ensuring that the clamping state is stable and reliable during the testing process;

[0033] S3. Automatic Scanning and Data Acquisition: First, the detection program is started through the human-machine interface. The PLC control system issues a command, and the stepper motor 508 drives the lead screw 505 to rotate at a constant speed through the reducer 507. This drives the slide block 506, which is equipped with an infrared rangefinder 501, to move at a constant speed from one end of the half-shaft to the other end along the slide rail 504. After the detection is completed, the system automatically displays the measurement results on the human-machine interface, including the specific value of the straightness error and the data curve. The system will compare the error value with the preset pass threshold and directly give the judgment conclusion of "pass" or "fail", and can provide audible and visual prompts.

[0034] S4. Disassembling the half shaft: After the inspection is completed, the unqualified half shaft will be removed and replaced by loosening the locking bolt 208, pulling down and pushing the handle 211 to open the clamp plate.

[0035] Working principle of the invention:

[0036] In this invention, a T-shaped base 1 is positioned directly below the half-shaft 3 to be tested, and a clamping mechanism 2 is provided at the end of the T-shaped base 1. The clamping mechanism 2 clamps the half-shaft 3 to be tested through a top clamp for collaborative operation. The clamping mechanism 2 also includes a fixing box 203. The back of the fixing box 203 is fixedly mounted on the end of the transverse base plate 101 of the T-shaped base plate 1 via an L-shaped long-handled fixing plate 4. A detection mechanism 5 is provided on the top of the transverse base plate 101. The detection mechanism 5 includes end plates A fixedly and vertically mounted at both ends of the transverse base plate 101. 502 and end plate B503, with a slide rail 504 laid at the bottom between end plate A502 and end plate B503, and a lead screw 505 installed at the top; the detection mechanism 5 also includes an infrared rangefinder 501 for scanning the half shaft 3 to be measured. The infrared rangefinder 501 is fixedly installed on a slide block 506, which is threadedly connected to the lead screw 505 and performs linear reciprocating motion on the slide rail 504; a reducer 507 is fixedly installed on the outer side of end plate B503, and the reducer 507 is connected to a stepper motor 508 to drive the lead screw 505 to rotate.

[0037] The operator first securely clamps the half-shaft 3 to be tested in the clamping mechanism 2 of the device. The top clamp of the clamping mechanism 2 includes a symmetrical left clamping plate 201 and a right clamping plate 202 with semi-circular grooves. Fixing pins 207 are fixedly installed at the bottom of both the left clamping plate 201 and the right clamping plate 202. A strip-shaped sliding groove 206 is provided on the wall of the fixing box 203 to accommodate the fixing pins 207, and a spring 209 connects the two fixing pins 207. An open groove is provided at the top of the fixing box 203 for the left clamping plate 201. 1. The opening and closing movement of the right clamping plate 202; the bottom surfaces of the left clamping plate 201 and the right clamping plate 202 are both hinged with connecting rods 205, and the other end of the connecting rods 2054 is hinged to the top of the push rod 204; a locking box 210 is sleeved on the push rod 204, and the locking box 210 is fixedly installed on the long handle end of the fixed hanging plate 4 with an L-shaped long handle. The side wall of the locking box 210 is threaded with a locking bolt 208. Tightening the locking bolt 208 can abut and fix the push rod 204, thereby locking the opening and closing state of the top clamp.

[0038] Pushing handle 211 causes the left clamping plate 201 and right clamping plate 202 with semi-circular grooves to precisely grip the workpiece. After the detection is started, stepper motor 508, after passing through reducer 507, drives lead screw 505 to rotate at a constant speed, causing slide block 506, equipped with infrared rangefinder 501, to move smoothly in a straight line along slide rail 504. During the scanning process, infrared rangefinder 501 continuously collects distance data between itself and various points on the surface of the half-shaft 3 under test at an extremely high frequency, and transmits massive amounts of data to the built-in control system in real time. The system processes the collected data through professional algorithms, automatically compensates for system errors, fits the ideal axis, and finally accurately calculates the straightness error value of the entire length of the half-shaft, and displays the judgment result in real time, thus completing an efficient and accurate automated detection.

[0039] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An online detection device for the straightness of the half-shaft of a vacuum circuit breaker operating mechanism, comprising a half-shaft to be tested (3), a T-shaped base (1), and a fixed mounting plate (4), wherein the T-shaped base (1) is located directly below the half-shaft to be tested (3), and a clamping mechanism (2) is provided at the end of the T-shaped base (1), and the half-shaft to be tested (3) is clamped by the clamp on the top of the clamping mechanism (2) for coordinated operation, characterized in that: The clamping mechanism (2) also includes a fixing box (203), the back of which is fixedly mounted on the end of the transverse base plate (101) of the T-shaped base plate (1) by an L-shaped long-handled fixing plate (4); a detection mechanism (5) is provided on the top of the transverse base plate (101), the detection mechanism (5) includes end plates A (502) and B (503) fixedly mounted vertically at both ends of the transverse base plate (101), and a sliding plate is laid at the bottom between end plates A (502) and B (503). The track (504) has a lead screw (505) mounted on top; the detection mechanism (5) also includes an infrared rangefinder (501) for scanning the half shaft (3) to be measured. The infrared rangefinder (501) is fixedly mounted on the slide (506). The slide (506) is threadedly connected to the lead screw (505) and moves linearly back and forth on the slide rail (504); a reducer (507) is fixedly mounted on the outer side of the end plate B (503). The reducer (507) is connected to a stepper motor (508) to drive the lead screw (505) to rotate.

2. The online detection device for the straightness of the half-shaft of the vacuum circuit breaker operating mechanism according to claim 1, characterized in that: The top clamp in the clamping mechanism (2) includes a left clamping plate (201) and a right clamping plate (202) that are symmetrical and have semi-circular grooves. The bottom of the left clamping plate (201) and the right clamping plate (202) are fixedly installed with fixing pins (207). A strip groove (206) is opened on the wall of the fixing box (203) to accommodate the fixing pins (207), and a spring (209) is connected between the two fixing pins (207). The top of the fixing box (203) has an open groove for the opening and closing movement of the left clamping plate (201) and the right clamping plate (202). The bottom end faces of the left clamping plate (201) and the right clamping plate (202) are both hinged with connecting rods (205), and the other end of the connecting rods (2054) is hinged to the top end of the push rod (204).

3. The online detection device for the straightness of the half-shaft of the vacuum circuit breaker operating mechanism according to claim 2, characterized in that: The bottom end of the push rod (204) is provided with a handle (211).

4. The online detection device for the straightness of the half-shaft of the vacuum circuit breaker operating mechanism according to claim 2, characterized in that: A locking box (210) is fitted on the push rod (204). The locking box (210) is fixedly installed on the long handle end of the fixed hanging plate (4) with an L-shaped long handle. A locking bolt (208) is threadedly connected to the side wall of the locking box (210). Tightening the locking bolt (208) can abut and fix the push rod (204), thereby locking the opening and closing state of the top clamp.

5. The online detection device for the straightness of the half-shaft of the vacuum circuit breaker operating mechanism according to claim 1, characterized in that: The T-shaped base (1) also includes a longitudinal support column (102), which is fixedly installed at the bottom center of the transverse base plate (101). The bottom of the longitudinal support column (102) is provided with a mounting flange, and the entire device can be fixed to the workbench or a specific tooling by bolts.

6. The online detection device for the straightness of the half-shaft of the vacuum circuit breaker operating mechanism according to claim 1, characterized in that: The long handle of the fixed hanging plate (4) has a long strip-shaped mounting hole, which is connected to the back of the fixed box (203) by bolts. The mounting hole is a strip-shaped hole used to adjust the height of the entire clamping mechanism (2) relative to the T-shaped base (1).

7. The online detection device for the straightness of the half-shaft of the vacuum circuit breaker operating mechanism according to claim 1, characterized in that: The detection mechanism (5) also includes a control system, which includes a PLC controller, a motor driver and a human-machine interface; the PLC controller is electrically connected to the stepper motor (508) and is used to control its start, stop, speed and direction; the PLC controller is electrically connected to the infrared rangefinder (501) and is used to receive and process its measurement data; the human-machine interface is used to input instructions and display measurement results.

8. The detection method of the online detection device for the straightness of the half-shaft of the vacuum circuit breaker operating mechanism according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Installation and calibration of the device: Securely install the device on the work platform through the mounting flange at the bottom of the T-shaped base (1); then perform initial calibration, that is, use a standard axis with known straightness compliance to replace the half axis to be measured (3) and clamp it in the clamping mechanism (2), control the infrared rangefinder (501) to scan along the full length of the standard axis, record a series of reference distance data, and store this data in the control system as a calibration reference; S2. Clamping the half shaft to be tested: First, in order to loosen the clamping mechanism, loosen the locking bolt (208) on the locking box (210) counterclockwise, push the handle (211) at the end of the push rod (204) upward, push the push rod (204) upward, and force the left clamping plate (201) and the right clamping plate (202) to open to both sides against the tension of the spring (209) through the linkage (205) mechanism; then, place the half shaft to be tested (3) between the left clamping plate (201) and the right clamping plate (202); pull the handle (211) downward to move the push rod (204) down, and under the action of the spring (209) rebound force, the semi-circular grooves of the left clamping plate (201) and the right clamping plate (202) will smoothly hold the half shaft to be tested (3); then, tighten the locking bolt (208) to completely lock the position of the push rod (204) to ensure that the clamping state is stable and reliable during the testing process; S3. Automatic Scanning and Data Acquisition: First, the detection program is started through the human-machine interface. The PLC control system issues a command, and the stepper motor (508) drives the lead screw (505) to rotate at a constant speed through the reducer (507). This drives the slide (506) equipped with the infrared rangefinder (501) to move at a constant speed from one end of the half shaft to the other end along the slide rail (504). After the detection is completed, the system automatically displays the measurement results on the human-machine interface, including the specific value of the straightness error and the data curve. The system will compare the error value with the preset pass threshold and directly give the judgment conclusion of "pass" or "fail", and can provide audible and visual prompts. S4. Disassembling the half shaft: After the inspection is completed, the unqualified half shaft will be removed and replaced by loosening the locking bolt (208), pulling down and pushing the handle (211) to open the clamp.

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