Circuit Breaker Overtravel and Opening Distance Measuring Device

Abstract

The present invention relates to a measuring device for the overtravel and opening distance of a circuit breaker; it includes an insulating plate, a contact spring, a base, a servo motor, a guide rail group, a moving block, a displacement sensor, and two circuit breaker guide blocks; the base includes four support feet, a rectangular platform frame, and a cross beam connecting the support feet; the contact spring is arranged on the insulating plate; the servo motor is installed at one end of the platform frame; the guide rail group includes four guide rails, which are divided into two groups. The first group is the vertical guide rails, which are installed on the platform frame and perpendicular to the insulating plate; the second group is the parallel guide rails, which are installed on the platform frame and parallel to the insulating plate; the circuit breaker whose overtravel and opening distance need to be measured is placed in the space formed by the two circuit breaker guide blocks and the side of the insulating plate where the contact spring is arranged; the displacement sensor is installed on the bottom guide rail of the base below the circuit breaker for measuring the overtravel and opening distance. The present invention only requires one person to operate, is simple to operate, takes less time, and the measurement data is accurate.

Description

Technical Field

[0001] The invention relates to an opening distance measuring device, in particular to a circuit breaker overtravel opening distance measuring device which is simple to operate, saves time and has accurate measurement data. Background Art

[0002] Overtravel and opening distance are important parameters of circuit breakers.

[0003] Overtravel: also called overtravel, refers to the part where the mechanism will continue to move beyond the position of the moving and static contacts after the moving and static contacts touch. The opening distance refers to the distance after the moving and static contacts of the circuit breaker are disconnected.

[0004] Opening distance: The distance between the moving contact and the static contact of the circuit breaker after disconnection.

[0005] At present, in the production and manufacturing of circuit breakers, the overtravel and opening distance measurement methods use the assembled circuit breakers as the measurement objects.

[0006] 1. Rotate the energy storage handle on the mechanism to drive the gear to rotate and lengthen the closing spring to store energy.

[0007] 2. After energy storage is completed, press the closing button to close the circuit breaker. Use a depth gauge to measure the distance from the bottom end of the adjusting rod of pole 1 to the bottom surface of the frame for pole 1 and record it. Repeat this operation for poles 2 and 3. The recorded number is the closing size.

[0008] 3. After the circuit breaker is closed, press the opening button to open the circuit breaker. Use a depth gauge to measure the distance from the bottom of the adjustment rod of pole 1 to the bottom of the frame and record it. Repeat this operation for poles 2 and 3; the recorded number is the opening size.

[0009] 4. When the circuit breaker is in the open state, use a multimeter or an active light bulb to connect the upper and lower outlet sockets of pole 1 respectively, and then use a tool such as a crowbar to press the main shaft of the circuit breaker to rotate it - counterclockwise movement. At this time, the adjustment rod of pole 1 will move upward in conjunction. When the multimeter sounds the sound of connection or the active light bulb lights up, make sure that the crowbar keeps pressing the main shaft without moving (that is, make sure that the transmission parts such as the main shaft remain in this state). At this time, use a depth gauge to measure the distance from the bottom end of the adjustment rod of pole 1 to the bottom surface of the frame for pole 1, and record it. After recording, stop applying force to the crowbar to reset the rotating parts such as the main shaft clockwise. Repeat this operation for poles 2 and 3. The recorded number is the free travel.

[0010] 5. Calculate and record the overtravel and open distance of each pole according to the following formula:

[0011] Overtravel = Closing size - Free travel

[0012] Opening distance = free travel - opening size

[0013] Note: The adjusting rod is connected to the insulating pull rod of the pole column.

[0014] Defects:

[0015] 1. It requires the cooperation of multiple people and the operation is complex.

[0016] 2. It takes too much time.

[0017] 3. Since the circuit breaker frame is all processed by welding, there will be thermal deformation of different degrees at the bottom of the frame. During manual testing, the reference is at the bottom of the frame bottom plate, and it is impossible to ensure that the depth gauge is accurately placed at the same position on the frame bottom plate every time. This will lead to deviations in the measurement results.

[0018] 4. When measuring the free stroke, since it is necessary to manually press and operate with a crowbar, it is necessary to stop immediately when the sound indicating that the multimeter is connected sounds and keep it still. Such operations will lead to deviations in the measurement results due to the lag in operation after hearing the sound and the uncertainty of maintaining the still state.

[0019] Before the circuit breaker is closed, energy storage can be completed by the motor or manually using the manual energy storage handle.

[0020] Electric energy storage: When the energy storage motor works, the motor drives the gear to rotate and stretch the closing spring for energy storage.

[0021] Manual energy storage: When manually storing energy, rotate the energy storage handle on the mechanism to drive the gear to rotate and stretch the closing spring for energy storage.

[0022] When the circuit breaker receives a closing command (manually push the closing button or start the closing electromagnet for electric closing), the mechanism drives the transmission system such as the main shaft to rotate counterclockwise. The insulating pull rod installed on the solid-sealed pole column moves upward in a straight line, driving the moving contact to close with the static contact at an appropriate speed and compressing the internal contact spring. At this time, the opening spring is stretched and stored with energy.

[0023] When the switch receives a tripping command (manually push the tripping button or start the tripping electromagnet for electric tripping), under the action of the opening spring and the contact spring, the insulating pull rod of the solid-sealed pole column drives the moving contact to separate from the static contact at an appropriate speed. At this time, the transmission system such as the main shaft rotates clockwise.

[0024] Circuit breaker pitch: The center distance between each pole column. Summary of the Invention

[0025] In view of the above problems, the main object of the present invention is to provide a circuit breaker overtravel and opening distance measuring device with simple operation, less time consumption, and accurate measurement data.

[0026] The present invention solves the above technical problems through the following technical solutions: A measuring device for the over-travel and opening distance of a circuit breaker; The measuring device for the over-travel and opening distance of the circuit breaker includes:

[0027] An insulating plate, a contact spring, a base, a servo motor, a guide rail group, a moving block, a displacement sensor, and two circuit breaker guide blocks; The base includes four support feet, a rectangular platform frame, and a support foot connecting cross beam;

[0028] The contact spring is arranged on the insulating plate; The servo motor is installed at one end of the platform frame;

[0029] The guide rail group includes four guide rails, which are divided into two groups. The first group is vertical guide rails, installed on the platform frame and perpendicular to the insulating plate; The second group is parallel guide rails, installed on the platform frame and parallel to the insulating plate;

[0030] The circuit breaker whose over-travel and opening distance need to be measured is placed in the space formed by the two circuit breaker guide blocks and the side of the insulating plate where the contact spring is arranged;

[0031] The displacement sensor is installed on the bottom guide rail on the base below the circuit breaker whose over-travel and opening distance are measured.

[0032] In a specific embodiment of the present invention: The measuring device for the over-travel and opening distance of the circuit breaker further includes a moving block, and the moving block includes four groups: an insulating plate moving block located between the insulating plate and the vertical guide rail; a guide block moving block located between the circuit breaker guide block and the parallel guide rail; a motor moving block located between the bottom cushion block of the servo motor and the parallel guide rail; a sensor moving block located between the displacement sensor and the guide rail on the base.

[0033] In a specific embodiment of the present invention: The insulating plate moving block, the guide block moving block, and the motor moving block are respectively connected to a displacement sensor, and all the displacement sensors are connected to a computer for data transmission.

[0034] In a specific embodiment of the present invention: The cross-section of the circuit breaker guide block is "L" shaped, and the circuit breaker whose over-travel and opening distance need to be measured is located in the semi-enclosed space formed by two "L" shapes.

[0035] In a specific embodiment of the present invention: The displacement sensor can slide on the bottom guide rail.

[0036] In a specific embodiment of the present invention: A connecting rotating shaft is arranged on the servo motor, and the connecting rotating shaft is located on the side where the circuit breaker whose over-travel and opening distance need to be measured is installed.

[0037] In a specific embodiment of the present invention: The contact spring includes six groups: two upper and lower rows, with three groups in each row. The left and right contact springs in each row of the three groups are symmetrical, and the area covered by the middle contact spring is smaller than the area covered by the left and right contact springs.

[0038] In a specific embodiment of the present invention: The bottom guide rail is provided with a cylinder, and the cylinder is a cylinder for controlling the overall rise or fall of the bottom guide rail.

[0039] The positive and progressive effects of the present invention are as follows: The breaker overtravel and opening distance measuring device provided by the present invention has the following advantages: The present invention only requires one person to operate, is simple to operate, takes less time, and the measurement data is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a perspective view of the overall structural schematic diagram of the present invention.

[0041] Figure 2 It is the front view of the present invention.

[0042] Figure 3 It is the left view of the present invention.

[0043] Figure 4 It is the top view of the present invention.

[0044] Figure 5-1 It is one of the displacement structural schematic diagrams of the present invention.

[0045] Figure 5-2 It is the second displacement structural schematic diagram of the present invention.

[0046] Figure 5-3 It is the third displacement structural schematic diagram of the present invention.

[0047] Figure 5-4 It is the fourth displacement structural schematic diagram of the present invention.

[0048] The following are the names corresponding to the reference numerals in the present invention:

[0049] Insulating plate 1, contact spring 2, base 3, servo motor 4, guide rail group 5, moving block 6, displacement sensor 7, two breaker guide blocks 8, bottom guide rail 9, breaker 10 whose overtravel and opening distance need to be measured;

[0050] Support leg 301, rectangular platform frame 302, support leg connecting cross beam 303;

[0051] Connecting rotating shaft 401;

[0052] Vertical guide rails 501, 502, parallel guide rails 503, 504;

[0053] Insulating plate moving block 601, guide block moving block 602, motor moving block 603, sensor moving block 604. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] The following provides a preferred embodiment of the present invention in conjunction with the drawings to detail the technical solution of the present invention.

[0055] The present invention provides a measuring device for the overtravel and opening distance of a circuit breaker. Figure 1 It is a perspective view of the overall structural schematic diagram of the present invention. Figure 2 It is the front view of the present invention. Figure 3 It is the left view of the present invention. Figure 4 It is the top view of the present invention. As Figure 1-4 shown, the measuring device for the overtravel and opening distance of the circuit breaker provided by the present invention includes: an insulating plate 1, a contact spring 2, a base 3, a servo motor 4, a guide rail group 5, a moving block 6, a displacement sensor 7, and two circuit breaker guide blocks 8; the base 3 includes four support feet 301, a rectangular platform frame 302, and a support foot connecting cross beam 303; the contact spring 2 is arranged on the insulating plate 1; the servo motor 4 is installed at one end of the platform frame 302; the guide rail group 5 includes four guide rails, and the four guide rails are divided into two groups. The first group is the vertical guide rails 501 and 502, which are installed on the platform frame and perpendicular to the insulating plate 1; the second group is the parallel guide rails 503 and 504, which are installed on the platform frame and parallel to the insulating plate 1.

[0056] The circuit breaker 10 whose overtravel and opening distance need to be measured is placed in the space formed by the two circuit breaker guide blocks 8 and the side of the insulating plate 1 where the contact spring 2 is arranged; the displacement sensor 7 is installed on the bottom guide rail 9 on the base 3 below the circuit breaker 10 whose overtravel and opening distance are measured.

[0057] The measuring device for the overtravel and opening distance of the circuit breaker provided by the present invention further includes a moving block 6. The moving block 6 includes four groups: an insulating plate moving block 601 located between the insulating plate 1 and the vertical guide rails 501 and 502; a guide block moving block 602 located between the circuit breaker guide blocks 8 and the parallel guide rails 503 and 504; a motor moving block 603 located between the bottom cushion block 9 of the servo motor 4 and the parallel guide rails 503 and 504; a sensor moving block 604 located between the displacement sensor 7 and the guide rail on the base 3.

[0058] The insulating plate moving block 601, the guide block moving block 602, and the motor moving block 603 are respectively connected to a displacement sensor 7, and all the displacement sensors 7 are connected to a computer for data transmission.

[0059] The cross section of the circuit breaker guide block 8 in the present invention is "L"-shaped, and the circuit breaker 10 whose overtravel and opening distance need to be measured is located in the semi-enclosed space formed by the two "L"-shapes.

[0060] The displacement sensor 7 in the present invention can slide on the bottom guide rail 9.

[0061] A connecting rotating shaft 401 is arranged on the servo motor 4 in the present invention, and the connecting rotating shaft 401 is located on the side where the circuit breaker 10 whose overtravel and opening distance need to be measured is installed.

[0062] As shown in Figure 1 , the contact spring 2 includes six groups: two upper and lower rows, with three groups in each row. The left and right contact springs in each row of the three groups are symmetrical, and the area covered by the middle contact spring is smaller than the area covered by the left and right contact springs.

[0063] The bottom guide rail 9 in the present invention is provided with a cylinder, and the cylinder is a cylinder for controlling the overall rise or fall of the bottom guide rail 9.

[0064] A specific embodiment is given below with reference to the accompanying drawings: Figure 5-1 One of the displacement structure schematic diagrams of the present invention. Figure 5-2 Another displacement structure schematic diagram of the present invention. Figure 5-3 Another displacement structure schematic diagram of the present invention. Figure 5-4 Another displacement structure schematic diagram of the present invention. As shown in the above figures: There are support feet at all four corners where the support feet of the present invention connect the cross beam, and the support feet at the four corners are all connected to the platform frame. A guide rail is provided on the support foot connecting cross beam. This guide rail is provided with a cylinder at the bottom, and when receiving an instruction, it can make the guide rail rise / fall as a whole; there are three moving blocks on this guide rail (the moving blocks are provided with motors and can move to directly below each pole column on the guide rail according to the different distances between the circuit breakers); a displacement sensor is fixed on each of the three moving blocks, and the sensors are respectively connected to a computer for data transmission. There are 4 guide rails on the platform frame. The tracks are all provided with limit blocks and are respectively provided with moving blocks at the bottom. The moving blocks are provided with motors and can move left and right on the guide rail according to different circuit breakers).

[0065] The bottom of the base is provided with a moving block, and the moving block is provided with a motor and can move left and right on the guide rail according to different circuit breakers. A servo motor is provided on the base, and there is a connecting rotating shaft on the servo motor.

[0066] There are six groups of contact springs on the insulating board respectively. At the same time, there is 1 wire connecting the upper contact spring and the lower contact spring in each group. A sensor is provided on the wire, and the sensor is for measuring the free travel. The upper contact spring contacts the upper outgoing line seat of the pole column, and the lower contact spring contacts the lower outgoing line seat of the pole column. When the circuit breaker is operated to a state where the free travel can be measured, the upper and lower contact springs are conducted with the upper and lower outgoing line seats, and at this time, the signal is transmitted from the sensor to the computer.

[0067] The specific usage steps of the present invention are as follows:

[0068] 1. Place the circuit breaker on the parallel guide rails 503 and 504 and confirm that:

[0069] 1.1 The displacement sensors on the guide rail of the support foot connecting cross beam have respectively moved to directly below each pole column; 1.2 The insulating board has been moved in place, and each group of contact springs contacts the pole column outgoing line seat.

[0070] 2. Connect the power supply to the circuit breaker and instruct the circuit breaker motor to run for energy storage.

[0071] After energy storage is completed, a closing command is sent to start the electric closing of the closing electromagnet.

[0072] 4. After closing, the guide rail connecting the support leg to the crossbeam receives an upward command. When it reaches the top position, the guide rail connecting the support leg to the crossbeam automatically descends back to its original position. During this process, each displacement sensor contacts the bottom surface of the adjusting rod at the bottom of the pole column, and the measured data is synchronously transmitted to the computer.

[0073] 5. When the guide rail connecting the support leg to the crossbeam automatically descends back to its original position, a tripping command is sent to start the electric tripping of the tripping electromagnet.

[0074] 6. After tripping, the guide rail connecting the support leg to the crossbeam receives an upward command. After rising to the top position, it no longer descends. During this process, each displacement sensor contacts the bottom surface of the adjusting rod at the bottom of the pole column, and the measured data is synchronously transmitted to the computer.

[0075] 7. Move the base and confirm the connection between the connecting shaft of the servo motor and the main shaft of the circuit breaker.

[0076] 8. The connecting shaft rotates, driving the relevant transmission components of the main shaft to move counterclockwise. When the upper and lower contact springs of the insulating plate corresponding to the first pole column 11 are in conduction with the upper and lower outgoing line seats, the motor stops moving. At this time, the measured data of the pole column 11 is synchronously transmitted to the computer, and then the motor reverses to reset the main shaft clockwise.

[0077] 9. After the main shaft is reset clockwise, the motor runs again. The connecting shaft rotates, driving the relevant transmission components of the main shaft to move counterclockwise. When the upper and lower contact springs of the insulating plate corresponding to the second pole column 12 are in conduction with the upper and lower outgoing line seats, the motor stops moving. At this time, the measured data of the second pole column 12 is synchronously transmitted to the computer, and then the motor reverses to reset the main shaft clockwise.

[0078] 10. After the main shaft is reset clockwise, the motor runs again. The connecting shaft rotates, driving the relevant transmission components of the main shaft to move counterclockwise. When the upper and lower contact springs of the insulating plate corresponding to the third pole column 13 are in conduction with the upper and lower outgoing line seats, the motor stops moving. At this time, the measured data of the third pole column 13 is synchronously transmitted to the computer, and then the motor reverses to reset the main shaft clockwise. At the same time, the guide rail connecting the support leg to the crossbeam receives a downward command to descend and reset.

[0079] 11. In the computer, the specific values of the overtravel and opening distance are calculated according to the formula. And a correct / wrong determination is made by comparing with the set correct value range: total stroke = closing dimension - tripping dimension; overtravel = closing dimension - free stroke; opening distance = total stroke - overtravel = free stroke - tripping dimension.

[0080] The advantages of the present invention are that only one person is required for operation, the operation is simple, the time consumption is less, and the data is accurate.

[0081] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A measuring device for the overtravel and opening distance of a circuit breaker; characterized in that: The circuit breaker overtravel and opening distance measuring device includes: an insulating plate, a contact spring, a base, a servo motor, a guide rail group, a moving block, a displacement sensor, and two circuit breaker guide blocks; the base includes four support feet, a rectangular platform frame, and a support foot connecting cross beam; the contact spring is arranged on the insulating plate; the servo motor is installed at one end of the platform frame; A guide rail is arranged on the support foot connecting cross beam, and a cylinder is provided at the bottom of this guide rail, which can make the whole guide rail rise / fall when receiving an instruction; there are three moving blocks on this guide rail; a displacement sensor is fixed on each of the three moving blocks, and the sensors are respectively connected to a computer for data transmission; the guide rail group includes four guide rails, which are divided into two groups. The first group is a vertical guide rail, which is installed on the platform frame and perpendicular to the insulating plate; the second group is a parallel guide rail, which is installed on the platform frame and parallel to the insulating plate; the circuit breaker whose overtravel and opening distance need to be measured is placed in the space formed by the two circuit breaker guide blocks and the side of the insulating plate where the contact spring is arranged; the displacement sensor is installed on the bottom guide rail on the base below the circuit breaker whose overtravel and opening distance are measured. The circuit breaker overtravel and opening distance measuring device further includes moving blocks, which are divided into four groups: an insulating plate moving block located between the insulating plate and the vertical guide rail; a guide block moving block located between the circuit breaker guide block and the parallel guide rail; a motor moving block located between the bottom cushion block of the servo motor and the parallel guide rail; a sensor moving block located between the displacement sensor and the guide rail on the base. The insulating plate moving block, the guide block moving block, and the motor moving block are respectively connected to a displacement sensor, and all the displacement sensors are connected to a computer for data transmission.

2. The overtravel and opening distance measuring device for a circuit breaker according to claim 1, wherein The cross section of the circuit breaker guide block is "L" shaped, and the circuit breaker whose overtravel and opening distance need to be measured is located in the semi-enclosed space formed by two "L" shapes.

3. The overtravel and opening distance measuring device for a circuit breaker according to claim 1, wherein The displacement sensor can slide on the bottom guide rail.

4. The circuit breaker overtravel and opening distance measuring device according to claim 1, wherein, A connecting rotating shaft is arranged on the servo motor, and the connecting rotating shaft is located on the side where the circuit breaker whose overtravel and opening distance need to be measured is installed.

5. The overtravel and opening distance measuring device for a circuit breaker according to claim 1, characterized in that, The contact spring includes six groups: two upper and lower rows, with three groups in each row. The left and right contact springs in each row of the three groups are symmetrical, and the area covered by the middle contact spring is smaller than the area covered by the left and right contact springs.

6. The overtravel and opening distance measuring device for a circuit breaker according to claim 1, wherein The bottom guide rail is provided with a cylinder, and the cylinder is a cylinder for controlling the overall rise or fall of the bottom guide rail.

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