Anti-misoperation plastic shell type circuit breaker
By setting a limit assembly on the push rod of the circuit breaker, the problem that the circuit breaker is easily misoperated when the circuit breaker is disconnected when repairing the equipment is solved, and the effect of improving the safety of the circuit breaker is achieved.
Patent Information
- Application Number
- CN202420761363.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-15
AI Technical Summary
When repairing equipment, existing circuit breakers are easily misoperated when disconnected, resulting in the life safety of maintenance workers being threatened.
A plastic shell circuit breaker that is anti-misoperated is designed. By setting limiting components on the push rod, including limiting pins, clamping plates, return springs and limit plates, the position of the push rod is limited to avoid misoperation.
It effectively prevents the circuit breaker from being misoperated during maintenance, improves the safety of the circuit breaker, and reduces the cost of safe use.
Smart Images
Figure CN222690605U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to a plastic housing type circuit breaker which can prevent misoperation. Background Art
[0002] Plastic case circuit breakers can automatically cut off the current after the current exceeds the tripping setting. The plastic case circuit breaker includes a shell made of plastic insulator and a control component arranged inside the shell. Plastic case circuit breakers usually include two functions: overload delay protection and short circuit instantaneous protection. Overload delay protection is to deform the double metal strip through thermal conduction. When the circuit breaker is overloaded, overheating is generated to cause the double metal strip to bend and deform, thereby triggering the rotation of the traction rod to achieve tripping. This tripping mechanism is usually provided with an inclined adjustment rod on the traction rod. The lateral position of the adjustment rod is adjusted by a knob, thereby adjusting the distance between the inclined surface and the adjusting screw on the bimetallic strip. Short circuit instantaneous protection is that when a short circuit occurs, the sudden increase in current causes the moving iron core and the static iron core on the traction rod to separate, thereby disconnecting the circuit.
[0003] When electrical equipment fails, workers are usually required to repair the equipment. In this case, the circuit breaker must be kept disconnected, otherwise it will endanger the life of the maintenance worker. In order to prevent others from misoperating the circuit breaker, warning signs are usually placed during maintenance. Since the warning signs can be moved at will, this will still make the maintenance worker feel uneasy. In order to prevent others from misoperating, the structure must be improved. In view of this, we propose a plastic case circuit breaker that prevents misoperation. Utility Model Content
[0004] The utility model aims to provide a plastic case circuit breaker that prevents misoperation, so as to solve the problem that the existing maintenance equipment proposed in the above background technology, during the disconnection of the circuit breaker, prevents others from misoperating the circuit breaker, which may cause life danger to maintenance personnel.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plastic cased circuit breaker for preventing misoperation, comprising a circuit breaker housing and a push rod, the upper end of the circuit breaker housing is provided with a wire transmission hole and a wire pressing bolt, the front end surface of the circuit breaker housing is provided with a groove for the push rod to be clamped, the circuit breaker housing and the push rod are connected by a pin shaft 1, the pin shaft 1 spans the inside of the groove, the end surface of the push rod facing the circuit breaker housing is provided with a limit assembly, the limit assembly comprises symmetrically arranged limit pins and support ear plates, the opposite ends of the limit pins are symmetrically provided with limit plates, a guide inclined surface is provided above the limit plate, a sliding groove for guiding the limit plate is opened on the push rod, the limit pin is movably inserted into the push rod, and a reset spring is movably sleeved on the limit pin, and the lower end of the support ear plate is rotatably connected with a clamping plate through a pin shaft 2.
[0006] Preferably, the clamping plate is clamped to the outer side surface of the symmetrical limiting plate, and the limiting plate is arranged on the inner side of the clamping plate.
[0007] Preferably, the return spring is arranged symmetrically on the outside of the limiting plate.
[0008] Preferably, a limiting hole is provided on the circuit breaker housing at a position corresponding to the limiting pin, and the limiting pin is movably inserted into the limiting hole.
[0009] Preferably, the second pin and the first pin are parallel to each other, and a torsion spring is sleeved on the second pin.
[0010] Preferably, the clamping plate is arranged below the push rod, and the ear plate is arranged on the inner side of the clamping plate.
[0011] Preferably, a "U"-shaped opening is provided on the snap-in plate.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] 1. This type of plastic case circuit breaker that prevents misoperation has a limit assembly on the push rod, and the limit assembly can limit the position of the push rod as needed; when repairing the fault circuit, the clamping plate can be turned counterclockwise around the second pin shaft, so that the limit plate is separated from the clamping plate limit, and the reset spring is reset, so that the spacing between the symmetrically arranged limit plates is increased, and then the limit pin is driven to insert into the limit hole. At this time, the push rod will not rotate, and the position of the push rod can be limited, thereby avoiding human misoperation, and further improving the safety of the use of the plastic case circuit breaker;
[0014] 2. This type of plastic cased circuit breaker that prevents misoperation has a limit pin, a clamping plate, a reset spring and a limit plate. The entire limit assembly is simple and easy to use. While improving the prevention of misoperation of the circuit breaker, it makes the safe use cost of the circuit breaker the lowest, and is worthy of popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model;
[0016] Figure 2 This is a schematic diagram of the circuit breaker housing structure of the utility model;
[0017] Figure 3 This is a schematic diagram of the structure of the limit assembly of the utility model;
[0018] Figure 4 This is a schematic diagram of the non-limited state of the limit assembly of the utility model;
[0019] Figure 5 It is a schematic diagram of the limiting state of the limiting component of the utility model;
[0020] Figure 6 This is a schematic diagram of the connection between the new limit pin and the limit plate used in this invention.
[0021] In the figure: 1. circuit breaker housing; 2. wire transmission hole; 3. wire pressing bolt; 4. push rod; 5. limit assembly; 50. limit hole; 51. limit pin; 52. sliding groove; 53. clamping plate; 54. reset spring; 55. limit plate; 56. support ear plate; 57. torsion spring; 58. guide slope; 59. pin shaft 2; 60. groove; 61. pin shaft 1. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] Example: See Figure 1-6 The utility model provides a technical solution: a plastic case circuit breaker with anti-misoperation function, mainly for the existing maintenance equipment, during the disconnection of the circuit breaker, to prevent others from misoperating the circuit breaker and causing life-threatening problems for maintenance personnel. The specific solution is as follows: it includes a circuit breaker housing 1 and a push rod 4, a wire transmission hole 2 and a wire pressing bolt 3 are provided at the upper end of the circuit breaker housing 1, a groove 60 for the push rod 4 to be clamped is provided on the front end surface of the circuit breaker housing 1, and the circuit breaker housing 1 and the push rod 4 are connected by a pin shaft 61, and the pin shaft 61 spans the inside of the groove 60.
[0024] See also Figure 3 , Figure 4 and Figure 5 The end surface of the push rod 4 facing the circuit breaker housing 1 is provided with a limit assembly 5, and the limit assembly 5 can fix the position of the push rod 4 during maintenance. During the maintenance process, the circuit breaker can be kept in a disconnected state and can avoid misoperation by others.
[0025] Specifically, the limiting assembly 5 includes a symmetrically arranged limiting pin 51 and a lug plate 56, and the lug plate 56 is fixedly installed with the circuit breaker housing 1. The circuit breaker housing 1 and the limiting pin 51 are rotatably connected. A limiting hole 50 is provided on the circuit breaker housing 1 at a position corresponding to the limiting pin 51, and the limiting pin 51 is movably inserted into the limiting hole 50.
[0026] Furthermore, a limit plate 55 is provided at the opposite end of the symmetrical limit pin 51, and a guide slope 58 is provided above the limit plate 55. The setting of the guide slope 58 can facilitate the insertion of other components (the following clamping plate 53). The push rod 4 is provided with a sliding groove 52 for guiding the limit plate 55. The limit pin 51 is movably inserted on the push rod 4, and a return spring 54 is movably sleeved on the limit pin 51. The return spring 54 is arranged on the outer side of the symmetrical limit plate 55. The lower end of the ear plate 56 is rotatably connected to the clamping plate 53 through the second pin 59.
[0027] Figure 4 The state shown is the state in which the push rod 4 is not restricted. At this time, the clamping plate 53 clamps the symmetrical limit plates 55, so that the reset spring 54 is stretched, and the adjacent limit pins 51 are retracted to the inside of the push rod 4 at the same time. The push rod 4 can be manually operated to open or close the circuit breaker; during maintenance operations, the clamping plate 53 can be flipped counterclockwise around the pin shaft 2 59 to make the limit plate 55 break away from the restriction of the clamping plate 53. At this time, the reset spring 54 is reset, so that the spacing between the symmetrically arranged limit plates 55 is increased, thereby driving the limit pins 51 to be inserted into the limit holes 50. During maintenance, the position of the push rod 4 can be limited to avoid human misoperation and affect the life safety of circuit breaker maintenance personnel.
[0028] Furthermore, the second pin 59 and the first pin 61 are parallel to each other, and a torsion spring 57 is sleeved on the second pin 59. The provision of the torsion spring 57 enables the clamping plate 53 to be reset to the initial state after swinging. Among them, the clamping plate 53 is clamped to the outer side of the symmetrical limit plate 55, and the limit plate 55 is arranged on the inner side of the clamping plate 53. The clamping plate 53 is arranged below the push rod 4, and the ear plate 56 is arranged on the inner side of the clamping plate 53. A "U"-shaped opening is provided on the clamping plate 53. The "U"-shaped clamping plate 53 is easier to limit the limit plate 55.
[0029] It is worth noting that the push rod 4 and the clamping plate 53 are both made of plastic material with a simple structure, which can improve the protection of the circuit breaker from misoperation while minimizing the safe use cost of the circuit breaker.
[0030] Working principle: When using this type of plastic case circuit breaker that prevents misoperation, the limit assembly 5 is as follows: Figure 4 In the state shown, at this time, the limit pin 51 is not inserted into the limit hole 50, and the push rod 4 can be manually operated to open or close the circuit breaker; and when a line fault occurs and the circuit breaker needs to be disconnected to repair the line, the clamping plate 53 can be flipped counterclockwise around the pin shaft 59, so that the limit plate 55 is free from the restriction of the clamping plate 53, and the reset spring 54 is reset, so that the spacing between the symmetrically arranged limit plates 55 is increased, thereby driving the limit pin 51 to be inserted into the limit hole 50. At this time, the push rod 4 will not rotate, and the position of the push rod 4 can be limited to avoid human misoperation and affect the life safety of the circuit breaker maintenance personnel.
[0031] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A plastic case circuit breaker for preventing misoperation, comprising a circuit breaker housing (1) and a push rod (4), wherein the upper end of the circuit breaker housing (1) is provided with a wire transmission hole (2) and a wire pressing bolt (3), characterized in that: The front end surface of the circuit breaker housing (1) is provided with a groove (60) for clamping the push rod (4), the circuit breaker housing (1) and the push rod (4) are connected via a pin shaft (61), the pin shaft (61) spanning the inside of the groove (60), the end surface of the push rod (4) facing the circuit breaker housing (1) is provided with a limit assembly (5), the limit assembly (5) comprises a symmetrically arranged limit pin (51) and a lug plate (56), symmetrically opposite ends of the limit pin (51) are provided with a limit plate (55), the upper part of the limit plate (55) is provided with a guide inclined surface (58), the push rod (4) is provided with a sliding groove (52) for guiding the limit plate (55), the limit pin (51) is movably inserted into the push rod (4), and a reset spring (54) is movably sleeved on the limit pin (51), and the lower end of the lug plate (56) is rotatably connected to a clamping plate (53) via a pin shaft (59).
2. The anti-misoperation plastic case circuit breaker according to claim 1, characterized in that: The clamping plate (53) is clamped to the outer side surface of the symmetrical limiting plate (55), and the limiting plate (55) is arranged on the inner side of the clamping plate (53).
3. The anti-misoperation plastic case circuit breaker according to claim 1, characterized in that: The return spring (54) is arranged symmetrically on the outside of the limiting plate (55).
4. The anti-misoperation plastic case circuit breaker according to claim 1, characterized in that: A limiting hole (50) is provided on the ear plate (56) at a position corresponding to the limiting pin (51), and the limiting pin (51) is movably inserted into the limiting hole (50).
5. The misoperation-proof plastic case circuit breaker according to claim 1, characterized in that: The second pin (59) and the first pin (61) are parallel to each other, and a torsion spring (57) is sleeved on the second pin (59).
6. The misoperation-proof plastic case circuit breaker according to claim 1, characterized in that: The clamping plate (53) is arranged below the push rod (4), and the ear plate (56) is arranged on the inner side of the clamping plate (53).
7. The misoperation-proof plastic case circuit breaker according to claim 1, characterized in that: The clamping plate (53) is provided with a U-shaped opening.