Breaker contact engagement depth measuring device with reasonable scheme

Abstract

The invention discloses a circuit breaker contact engagement depth measuring device with a reasonable scheme, and relates to the field of circuit breaker contact engagement depth measurement, the circuit breaker contact engagement depth measuring device comprises a fixed base and a first ring sleeve, the top of the fixed base is slidably provided with a high-voltage circuit breaker, and the high-voltage circuit breaker is uniformly provided with circuit breaker moving contacts; the top of the fixed base is fixedly provided with the copper bar, the side wall of the copper bar is fixedly provided with the switch cabinet static contact, the top of the fixed base is provided with the adaptation assembly, and the arrangement of the adaptation assembly can firstly adapt to the circuit breaker moving contacts and the switch cabinet static contacts of different sizes and models, so that frequent replacement of various measurement devices is not needed, and the measurement accuracy is improved. Therefore, the efficiency of measuring the meshing depth of the moving contact of the circuit breaker and the static contact of the switch cabinet is improved, and meanwhile, the device can be quickly dismounted and mounted on a copper bar, so that the device can measure the meshing depth of the moving contacts of the circuit breaker and the static contact of the switch cabinet in multiple batches and in different models.

Description

Technical Field

[0001] The present invention relates to the field of circuit breaker contact engagement depth measurement, and in particular to a circuit breaker contact engagement depth measurement device with a reasonable solution. Background Art

[0002] High-voltage circuit breakers are vital switching devices in power systems, which control and protect circuits under normal and fault conditions. Their core work depends on the coordinated operation of the moving contact and the static contact of the switch cabinet. As a movable component, the moving contact is driven by the operating mechanism to complete the closing and separation actions with the fixed static contact of the switch cabinet, thereby realizing the on and off of the circuit. The static contact of the switch cabinet is firmly installed in the switch cabinet and connected to the busbar and other components. When cooperating with the moving contact, it ensures stable circuit conduction through sufficient contact pressure. When the circuit operates normally, the moving contact is in close contact with the static contact of the switch cabinet to ensure smooth transmission of current. When a circuit fault occurs, the operating mechanism of the high-voltage circuit breaker prompts the moving contact to quickly separate from the static contact of the switch cabinet, and uses the arc extinguishing medium to extinguish the generated arc, thereby cutting off the fault current in time and protecting the safety of the power system.

[0003] During factory inspection, switchgear must test the engagement depth between the circuit breaker's (isolator's) moving contacts and the switchgear's static contacts. Because the switchgear's static contacts are mounted in a contact box behind the circuit breaker compartment's partition, measuring this depth is difficult. Currently, the main testing method involves applying conductive paste to the static contacts inside the switchgear, then swinging the circuit breaker in until the moving contacts engage with the switchgear's static contacts. The circuit breaker is then pulled out, and the scratches left on the static contacts are measured with a tape measure to determine the engagement depth. Alternatively, visual testing equipment equipped with a power supply and sensors can be used for measurement.

[0004] The Chinese patent application number 202020804664.4 discloses a "device for measuring the engagement depth of the moving contact of the circuit breaker and the static contact of the switch cabinet". After the measuring device is assembled, it can be put on the static contact of the switch cabinet so that the end face of the lower base contacts the copper bar overlapped by the static contact, and then the circuit breaker is shaken in to make its moving contact engage with the static contact of the switch cabinet. The upper base will move along the two guide square shafts under the pressure of the moving contact. The upper base includes a left half and a right half, and the left half and the right half are connected by a positioning shaft. The outer rings of the left half and the right half are provided with a fastening rubber ring, and a first guide square shaft is provided on the left half, and a first tooth-shaped rack is provided on the first guide square shaft. The right half is provided with a second guide square shaft, and a scale is provided on the outer surface of the second guide square shaft.

[0005] Although this technology achieves a small error in measuring the engagement depth of circuit breaker contacts, and is less affected by external environmental factors, can be used anytime and anywhere, and has high measurement efficiency and accuracy, the models of circuit breakers are different, and therefore the sizes of their contacts are also different. Therefore, this device is only suitable for detecting the contact engagement depth of circuit breakers in the same batch. At the same time, the inverted triangular tooth-shaped rack on the first guide square shaft on the upper base and the first guide square shaft sleeve on the lower base are engaged with each other to obtain the contact engagement depth of the circuit breaker. There are certain disadvantages. First, if the contact engagement depth of the circuit breaker happens to be such that the two triangular tooth-shaped racks cannot engage, then the spring will push one of the triangular tooth-shaped racks to form another engagement. As a result, the engagement depth cannot be accurately calculated due to the rebound of the spring. At the same time, if the staff directly observes and reads the value of the scale, the staff may not be able to read the value vertically, resulting in inaccurate measurement of the engagement depth.

[0006] Therefore, a circuit breaker contact engagement depth measuring device with a reasonable scheme is proposed. Summary of the Invention

[0007] The object of the present invention is to provide a circuit breaker contact engagement depth measuring device with a reasonable solution to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solutions: a circuit breaker contact engagement depth measuring device with a reasonable solution, comprising a fixed base and a first annular sleeve, a high-voltage circuit breaker being slidably mounted on the top of the fixed base, the circuit breaker moving contacts being evenly mounted on the high-voltage circuit breaker, a copper bar being fixedly mounted on the top of the fixed base, a switch cabinet static contact being fixedly mounted on the side wall of the copper bar, an adapter assembly being provided on the top of the fixed base, the adapter assembly comprising a plurality of connecting rods, each of the connecting rods being fixedly connected to the inner side of the first annular sleeve, and the number of the connecting rods being set to be no less than six, the six connecting rods having one end close to the center of the first annular sleeve being fixedly connected to a second annular sleeve, a stepping motor being fixedly mounted between the second annular sleeve and the first annular sleeve, and the middle portion of each connecting rod being penetrated and rotatably connected to a first gear; The second circular ring is provided with a measuring assembly, which includes two first rectangular guide sleeves. The two first rectangular guide sleeves are symmetrically fixedly connected to the side wall of the second circular ring.

[0009] Furthermore, the adapter assembly also includes a second gear, each of the first gears is fixedly connected to a second gear at one end near the connecting rod, and each of the second gears is rotatably connected to the side wall of the connecting rod, an annular groove is provided inside the first annular sleeve, and an annular inner rack is slidably connected inside the annular groove, a plurality of first limit openings are provided in an annular array on the side wall of the first annular sleeve, and the number of the plurality of first limit openings is set to no less than six, each of the first limit openings is slidably connected to a gear rod, and each of the gear rods is fixedly connected to a rubber block at one end near the center of the first annular sleeve, a plurality of second limit openings are provided in an annular array on the side wall of the second annular sleeve, and the number of the plurality of second limit openings is set to no less than six.

[0010] Furthermore, the measuring component also includes two sliding rods, each of the sliding rods is slidably connected to the inner cavity of the first rectangular guide sleeve, and the two sliding rods are fixedly connected to a disc at one end away from the first rectangular guide sleeve, and a circular hole is opened in the middle of the disc. The bottom of each first rectangular guide sleeve is fixedly connected to a spring, and the end of each spring away from the bottom of the inner cavity of the first rectangular guide sleeve is fixedly connected to the sliding rod. A laser rangefinder is fixedly installed on the side of the disc close to the sliding rod, and a lighting panel is fixedly connected to the top of one of the first rectangular guide sleeves.

[0011] Furthermore, the static contact of the switch cabinet is located on the movement path of the moving contact of the circuit breaker, and the output shaft end of the stepping motor is fixedly connected to one of the first gears.

[0012] Furthermore, each of the first gears is meshed with the annular inner rack, the interior of each of the second limiting openings is slidably connected to the gear rod, and the sizes of each of the first limiting openings and the second limiting openings are adapted to each other.

[0013] Furthermore, each of the second gears is meshed with the gear rod, each of the second gears is located on the movement path of the gear rod, and the size of the second annular sleeve is larger than that of the copper bar.

[0014] Furthermore, the size of the circular hole is larger than the static contact of the switch cabinet, and the lighting plate is located on the movement path of the laser rangefinder.

[0015] Furthermore, the disc is opened and closed electrically controlled by an external control panel.

[0016] Furthermore, the stepper motor is electrically controlled to start and stop by an external control panel.

[0017] Furthermore, the copper bar is located on the movement path of the six gear rods.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The setting of the adapter component can first adapt to different sizes and models of circuit breaker moving contacts and switch cabinet static contacts, so there is no need to frequently replace multiple measuring devices, thereby improving the measurement efficiency of the engagement depth of the circuit breaker moving contact and the switch cabinet static contact. At the same time, the device can be quickly disassembled and installed on the copper busbar, thereby realizing the measurement of the engagement depth of multiple batches and different models of circuit breaker moving contacts and switch cabinet static contacts by the device.

[0019] The distance moved is calculated by a laser rangefinder and displayed on the screen. The distance moved by the laser rangefinder is the depth of the switch cabinet static contact entering the circuit breaker moving contact. This can firstly intuitively present the depth of engagement between the circuit breaker moving contact and the switch cabinet static contact through data, and secondly avoid the deviation caused by manual reading of the value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the structure of the high-voltage circuit breaker, the circuit breaker moving contact, the copper busbar and the switch cabinet static contact of the present invention; Figure 3 It is a three-dimensional schematic diagram of the first circular ring sleeve and the second circular ring sleeve structure of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure at center A; Figure 5 It is a three-dimensional schematic diagram of the connecting rod, the second annular sleeve and the stepping motor structure of the present invention; Figure 6 This is a schematic cross-sectional view of the first circular ring sleeve structure of the present invention; Figure 7 This is an exploded schematic diagram of the adapter assembly structure of the present invention; Figure 8 It is a three-dimensional schematic diagram of the first circular ring sleeve and the second circular ring sleeve structure of the present invention; Figure 9 It is a three-dimensional schematic diagram of the disc and circular hole structure of the present invention; Figure 10 This is a schematic diagram of the relationship structure of the measurement components of the present invention; Figure 11 For the present invention Figure 10 A magnified schematic diagram of the structure at point B in the middle.

[0021] The numbers in the figure represent: 1. Fixed base; 2. High-voltage circuit breaker; 3. Circuit breaker moving contact; 4. Copper busbar; 5. Switchgear static contact; 6. Adapter assembly; 601. First annular sleeve; 602. Connecting rod; 603. Second annular sleeve; 604. Stepper motor; 605. First gear; 606. Second gear; 607. Annular groove; 608. Annular inner rack; 609. First stop; 610. Rack rod; 611. Rubber block; 612. Second stop; 7. Measuring assembly; 701. First rectangular guide sleeve; 702. Sliding rod; 703. Disc; 704. Circular hole; 705. Spring; 706. Laser rangefinder; 707. Lighting board. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] See also Figures 1 to 11, is an embodiment provided by the present invention: a circuit breaker contact engagement depth measuring device with a reasonable scheme, comprising a fixed base 1, a first annular sleeve 601, a high-voltage circuit breaker 2 is slidably installed on the top of the fixed base 1, and the circuit breaker moving contacts 3 are evenly installed on the high-voltage circuit breaker 2, a copper bar 4 is fixedly installed on the top of the fixed base 1, and the copper bar 4 is located on the movement path of the six gear rods 610, and the side wall of the copper bar 4 is fixedly installed with a switch cabinet static contact 5, which is located on the movement path of the circuit breaker moving contact 3, and the high-voltage circuit breaker 2, the circuit breaker moving contact 3, the copper bar 4, and the switch cabinet static contact 5 are all existing technologies of existing devices, the high-voltage circuit breaker 2 is a vital switching device in the power system, which realizes circuit control and protection under normal and fault conditions, and its core work depends on the coordinated operation of the circuit breaker moving contact 3 and the switch cabinet static contact 5; the circuit breaker moving contact 3 is a movable component, which is driven by the operating mechanism and is connected to the fixed switch cabinet static contact 5 completes the closing and separation action, thereby realizing the on-off of the circuit; the static contact 5 of the switch cabinet is firmly installed in the switch cabinet and is connected to the copper bus 4 and other components. When cooperating with the moving contact 3 of the circuit breaker, the circuit conduction is stable through sufficient contact pressure, so no more details are given. An adapter component 6 is provided on the top of the fixed base 1. The adapter component 6 includes a plurality of connecting rods 602, each connecting rod 602 is fixedly connected to the inner side of the first circular sleeve 601, and the number of connecting rods 602 is set to be not less than six. The ends of the six connecting rods 602 close to the center of the first circular sleeve 601 are commonly fixedly connected to the second circular sleeve 603, and a stepper motor 604 is commonly fixedly installed between the second circular sleeve 603 and the first circular sleeve 601. The stepper motor 604 is electrically controlled to start and close by an external control panel. The middle part of each connecting rod 602 is penetrated and rotatably connected to the first gear 605, and the output shaft end of the stepper motor 604 is fixedly connected to one of the first gears 605; The second circular sleeve 603 is provided with a measuring assembly 7 , which includes two first rectangular guide sleeves 701 . The two first rectangular guide sleeves 701 are symmetrically fixedly connected to the side wall of the second circular sleeve 603 .

[0024] The adapter assembly 6 also includes a second gear 606, each first gear 605 is fixedly connected to the second gear 606 at one end close to the connecting rod 602, and each second gear 606 is rotatably connected to the side wall of the connecting rod 602, the interior of the first annular sleeve 601 is provided with an annular groove 607, the interior of the annular groove 607 is slidably connected to an annular inner rack 608, the side wall of the first annular sleeve 601 is provided with a plurality of first limiting openings 609 in an annular array, the number of the plurality of first limiting openings 609 is set to be no less than six, each first limiting opening 609 is slidably connected to a gear rod 610, and each second gear 606 is connected to the gear rod 610. They are meshed with each other, and each second gear 606 is located on the movement path of the gear rod 610. The size of the second annular sleeve 603 is larger than the size of the copper bar 4. One end of each gear rod 610 close to the center of the first annular sleeve 601 is fixedly connected to a rubber block 611, and a plurality of second limiting openings 612 are provided in an annular array on the side wall of the second annular sleeve 603. The number of the plurality of second limiting openings 612 is set to be no less than six. Each first gear 605 is meshed with the annular inner rack 608, and the interior of each second limiting opening 612 is slidably connected to the gear rod 610, and the sizes of each first limiting opening 609 and the second limiting opening 612 are adapted to each other.

[0025] The measuring assembly 7 also includes two sliding rods 702, each of which is slidably connected to the inner cavity of the first rectangular guide sleeve 701. The two sliding rods 702 are fixedly connected to a disk 703 at one end away from the first rectangular guide sleeve 701. The disk 703 is electrically controlled to open and close by an external control panel. A circular hole 704 is opened in the middle of the disk 703. A spring 705 is fixedly connected to the bottom of each first rectangular guide sleeve 701. The end of each spring 705 away from the bottom of the inner cavity of the first rectangular guide sleeve 701 is fixedly connected to the sliding rod 702. A laser rangefinder is fixedly installed on the side of the disk 703 close to the sliding rod 702. 706. At the same time, the laser rangefinder 706 is an existing technology of an existing device. The laser rangefinder 706 is usually composed of a laser transmitter, a receiver, a signal processing system and a display screen. The laser transmitter is responsible for emitting high-brightness, highly directional laser; the receiver is used to capture the reflected laser signal; the signal processing system analyzes and processes the transmitted and received signals, calculates the distance value and displays it on the display screen. A lighting plate 707 is fixedly connected to the top of one of the first rectangular guide sleeves 701. The size of the circular hole 704 is larger than the static contact 5 of the switch cabinet. The lighting plate 707 is located on the movement path of the laser rangefinder 706.

[0026] The above implementation works as follows: The initialization steps are as follows: The staff first holds the first annular sleeve 601, and at the same time passes through the circular hole 704 and the second annular sleeve 603 through the copper bus 4 and the outer side of the second annular sleeve 603 of the switch cabinet static contact 5, and ensures that the switch cabinet static contact 5 and the disc 703 remain in the same vertical plane.

[0027] The steps for running the job are as follows: The working steps of the adapter component 6 are as follows: As described in the initialization step, the staff controls the stepper motor 604 to be powered on and started by controlling the external control panel, so that the stepper motor 604 is powered on and drives the first gear 605 to rotate through its output shaft end, so that the first gear 605 starts to rotate with the connection between the connecting rod 602 and the first gear 605 as the axis, and at the same time, the first gear 605 drives the annular inner rack 608 engaged therewith to start rotating, so that the annular inner rack 608 slides on the annular groove 607. As the annular inner rack 608 continues to slide on the annular groove 607, the annular inner rack 608 drives the other five first gears 605 to maintain the same speed as the first gear 605 driven by the stepper motor 604. Therefore, the six first gears 605 also drive the second gears 606 to maintain the same speed and start rotating in the same direction, so the second gear 606 drives the gear rod 610 meshing with it to move in the direction close to the copper busbar 4, so the six gear rods 610 all slide on the first limit opening 609 and the second limit opening 612, so that the six gear rods 610 drive the rubber blocks 611 to contact the outside of the copper busbar 4, thereby ensuring that when the switch cabinet static contact 5 and the disc 703 remain on the same vertical plane, the staff will not accidentally touch the disc 703 to cause movement deviation, and at the same time, the six rubber blocks 611 contact the copper busbar 4 to achieve temporary fixation of the first annular sleeve 601 and the second annular sleeve 603.

[0028] The working steps of the measuring component 7 are as follows: After the staff completes the working steps of the adapter component 6, the staff pushes the high-voltage circuit breaker 2 to move in the direction close to the static contact 5 of the switch cabinet. At the same time, the staff starts the laser rangefinder 706 through the external control panel. The laser rangefinder 706 irradiates the laser on the light panel 707. At the same time, the high-voltage circuit breaker 2 drives the circuit breaker moving contact 3 to start moving in the direction close to the static contact 5 of the switch cabinet. When the static contact 5 of the switch cabinet begins to enter the interior of the circuit breaker moving contact 3 and engage with it, the outer side of the circuit breaker moving contact 3 is against the disc 703, so that as the circuit breaker moving contact 3 continues to move, the switch cabinet static contact 5 remains stationary. Therefore, the circuit breaker moving contact 3 is equivalent to starting to push the disc 703. At this time, the circuit breaker moving contact 3 pushes the disc 703 to move in the direction close to the copper bus 4, and at the same time, the disc 703 drives the laser The optical rangefinder 706 moves synchronously, so the laser rangefinder 706 continuously moves toward the direction close to the skylight panel 707, and the disc 703 drives the sliding rod 702 to slide on the first rectangular guide sleeve 701 toward the direction close to the copper busbar 4. At the same time, the sliding rod 702 begins to compress the spring 705. When the moving contact 3 of the circuit breaker and the static contact 5 of the switch cabinet are fully engaged and the circuit of the switch cabinet is connected, the staff no longer pushes the high-voltage circuit breaker 2 to continue moving. At this time, the depth of the static contact 5 of the switch cabinet entering into the moving contact 3 of the circuit breaker needs to be measured. Therefore, along with the distance moved by the laser rangefinder 706, the laser rangefinder 706 calculates the distance it moves and displays it on the display screen. The distance moved by the laser rangefinder 706 is the depth of the static contact 5 of the switch cabinet entering into the moving contact 3 of the circuit breaker.

[0029] The steps for disassembling the adapter assembly 6 or adapting different types of high-voltage circuit breakers 2 or switch cabinet static contacts 5 are as follows: When the depth measurement work is completed, it is necessary to disassemble, or to detect different types of switch cabinet static contacts 5 or different types of high-voltage circuit breakers 2, then it is only necessary to reverse the stepper motor 604, so that the stepper motor 604 is energized to drive the first gear 605 to rotate through its output shaft end, so that the first gear 605 starts to rotate with the connection between the connecting rod 602 and the first gear 605 as the axis, and at the same time, the first gear 605 drives the annular inner rack 608 meshing with it to start rotating, so that the annular inner rack 608 slides on the annular groove 607, and as the annular inner rack 608 continues to slide on the annular groove 607, the annular inner rack 608 drives the other five first gears 605 to maintain and be stepped on. The six first gears 605 drive the second gears 606 at the same speed as the first gear 605 driven by the motor 604, so that the six first gears 605 also drive the second gears 606 to maintain the same speed and start rotating in the same direction. Therefore, the second gear 606 drives the gear rod 610 meshing with it to move in the direction away from the copper bar 4. Therefore, the six gear rods 610 all slide on the first limit opening 609 and the second limit opening 612, so that the six gear rods 610 drive the rubber block 611 to no longer resist the outside of the copper bar 4. At this time, the staff holds the first annular sleeve 601 to separate the device from the outside of the copper bar 4 and the switch cabinet static contact 5, and the working steps of replacing different models of high-voltage circuit breakers 2 or switch cabinet static contacts 5 are repeated.

[0030] The provision of the adapter component 6 allows the device to adapt to different sizes and models of circuit breaker moving contacts 3 and switch cabinet static contacts 5, eliminating the need for frequent replacement of multiple measuring devices. This improves the efficiency of measuring the engagement depth of the circuit breaker moving contact 3 and the switch cabinet static contact 5. Furthermore, the device can be quickly disassembled and installed on the copper busbar 4, enabling the device to measure the engagement depth of multiple batches and different models of circuit breaker moving contacts 3 and switch cabinet static contacts 5.

[0031] The distance moved is calculated by the laser rangefinder 706 and displayed on the display screen. The distance moved by the laser rangefinder 706 is the depth of the switch cabinet static contact 5 entering the circuit breaker moving contact 3. Therefore, the depth of engagement between the circuit breaker moving contact 3 and the switch cabinet static contact 5 can be intuitively presented through data, and the deviation caused by manual reading of the numerical value can be avoided.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A circuit breaker contact engagement depth measuring device with a reasonable scheme, comprising a fixed base (1), a first annular sleeve (601), a high-voltage circuit breaker (2) being slidably mounted on the top of the fixed base (1), the circuit breaker moving contacts (3) being evenly mounted on the high-voltage circuit breaker (2), a copper busbar (4) being fixedly mounted on the top of the fixed base (1), and a switch cabinet static contact (5) being fixedly mounted on the side wall of the copper busbar (4), characterized in that: An adapter assembly (6) is provided on the top of the fixed base (1), and the adapter assembly (6) includes a plurality of connecting rods (602), each of the connecting rods (602) being fixedly connected to the inner side of the first circular sleeve (601), and the number of the connecting rods (602) is set to be no less than six, and one end of the six connecting rods (602) close to the center of the first circular sleeve (601) is fixedly connected to a second circular sleeve (603), and a stepping motor (604) is fixedly installed between the second circular sleeve (603) and the first circular sleeve (601), and the middle part of each connecting rod (602) is penetrated and rotatably connected to a first gear (605); A measuring assembly (7) is provided on the second circular ring sleeve (603), and the measuring assembly (7) comprises two first rectangular guide sleeves (701), and the two first rectangular guide sleeves (701) are symmetrically fixedly connected to the side wall of the second circular ring sleeve (603).

2. A circuit breaker contact engagement depth measuring device according to claim 1, characterized in that: The adapter assembly (6) further comprises a second gear (606), wherein each of the first gears (605) is fixedly connected to the second gear (606) at one end close to the connecting rod (602), and each of the second gears (606) is rotatably connected to the side wall of the connecting rod (602); a circular groove (607) is provided inside the first annular sleeve (601), and a ring-shaped inner rack (608) is slidably connected inside the circular groove (607); a plurality of first limiting openings (609) are provided in an annular array on the side wall of the first annular sleeve (601), and the number of the plurality of first limiting openings (609) is set to be no less than six; each of the first limiting openings (609) is slidably connected to a gear rod (610), and each of the gear rods (610) is fixedly connected to a rubber block (611) at one end close to the center of the first annular sleeve (601); a plurality of second limiting openings (612) are provided in an annular array on the side wall of the second annular sleeve (603), and the number of the plurality of second limiting openings (612) is set to be no less than six.

3. A circuit breaker contact engagement depth measuring device according to claim 1, characterized in that: The measuring assembly (7) further comprises two sliding rods (702), each of the sliding rods (702) being slidably connected to the inner cavity of the first rectangular guide sleeve (701), the two sliding rods (702) being fixedly connected to a disk (703) at one end away from the first rectangular guide sleeve (701), a circular hole (704) being provided in the middle of the disk (703), a spring (705) being fixedly connected to the bottom of each first rectangular guide sleeve (701), and each spring (705) being fixedly connected to the sliding rod (702) at one end away from the bottom of the inner cavity of the first rectangular guide sleeve (701), a laser rangefinder (706) being fixedly mounted on one side of the disk (703) close to the sliding rod (702), and a lighting plate (707) being fixedly connected to the top of one of the first rectangular guide sleeves (701).

4. A circuit breaker contact engagement depth measuring device according to claim 1, characterized in that: The switch cabinet static contact (5) is located on the movement path of the circuit breaker moving contact (3), and the output shaft end of the stepping motor (604) is fixedly connected to one of the first gears (605).

5. A circuit breaker contact engagement depth measuring device according to claim 2, characterized in that: Each of the first gears (605) is meshed with the annular inner rack (608), the interior of each of the second limiting openings (612) is slidably connected to the gear rod (610), and the sizes of each of the first limiting openings (609) and the second limiting openings (612) are adapted to each other.

6. A circuit breaker contact engagement depth measuring device according to claim 2, characterized in that: Each second gear (606) is meshed with the gear rod (610), and each second gear (606) is located on the movement path of the gear rod (610). The size of the second annular sleeve (603) is larger than that of the copper bar (4).

7. A circuit breaker contact engagement depth measuring device according to claim 3, characterized in that: The size of the circular hole (704) is larger than the switch cabinet static contact (5), and the lighting plate (707) is located on the movement path of the laser rangefinder (706).

8. A circuit breaker contact engagement depth measuring device according to claim 3, characterized in that: The disc (703) is electrically controlled to open and close by an external control panel.

9. A circuit breaker contact engagement depth measuring device according to claim 1, characterized in that: The stepper motor (604) is electrically controlled to start and stop by an external control panel.

10. A circuit breaker contact engagement depth measuring device according to claim 2, characterized in that: The copper bar (4) is located on the movement path of the six gear rods (610).

Images