A dustproof molded case circuit breaker with easy maintenance of parts

Abstract

The present invention discloses a dustproof molded case circuit breaker which is convenient for maintaining parts, and relates to the technical field of molded case circuit breakers, comprising a lower molded case, wherein an upper molded case is arranged on the lower molded case, and a manual lever is arranged on the upper molded case, and a fixing plate is hinged at the lower end of the lower molded case, and a threaded rod is installed on the fixing plate through a thread, and a limit plate is fixedly installed on the threaded rod, and a second L-shaped clamping plate is provided at the lower end of the lower molded case, and a convex groove is provided on the second L-shaped clamping plate, and the limit plate is rotatably installed in the convex groove provided on the second L-shaped clamping plate. The present invention installs the circuit breaker to a specified position and fixes the lower molded case and the upper molded case at the same time, and there is no need to spend time separately to handle the fixing work of the lower molded case and the upper molded case after completing the installation of the main body, so that the whole installation process can be more compact and coherent, and additional operation steps and time consumption are reduced, especially in large-scale electrical projects where a large number of circuit breakers need to be installed, and the installation efficiency can be significantly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of molded case circuit breakers, and in particular to a dustproof molded case circuit breaker with easy maintenance of parts. Background Art

[0002] In the field of electrical equipment, the installation and maintenance of dustproof molded case circuit breakers are crucial links. Molded case circuit breakers can automatically cut off the current when the current exceeds the trip setting. Molded case refers to the use of plastic insulators as the outer shell of the device to isolate the conductors and the grounded metal parts. Molded case circuit breakers usually contain thermal magnetic trip units;

[0003] The current molded case circuit breakers have been found to have at least the following technical problems:

[0004] First, for the maintenance of circuit breakers, the existing disassembly method is complicated, and it is difficult to quickly open the plastic shell to inspect and replace internal parts, resulting in low maintenance efficiency and increased equipment downtime.

[0005] Second, during the installation process, the fixing of the plastic shell is usually cumbersome and needs to be handled separately after the main body is installed, which increases the operation steps and time costs, especially in large-scale electrical projects, affecting the installation efficiency.

[0006] Third, the traditional dustproof molded case circuit breaker has a relatively simple installation method and can often only adapt to specific installation environments. It cannot flexibly meet the different needs of slide rail installation or flat installation, which limits its application in diversified electrical layouts. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides a dustproof molded case circuit breaker with easy maintenance of parts to solve the above-mentioned technical problems.

[0009] (II) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0011] The cam is provided with a plurality of L-shaped plates, and the plurality of L-shaped plates are provided with a plurality of L-shaped plates, and the plurality of L-shaped plates are provided with a plurality of L-shaped plates.

[0012] Preferably: a first L-shaped clamp is hinged at the lower end of the lower plastic shell, a first slot is opened at the lower end of the upper plastic shell, a latch is fixedly installed on the lower plastic shell, the latch is installed in the first slot opened in the upper plastic shell, a locking block is slidably installed in the T-shaped socket opened in the upper plastic shell, and the lock plate limiter is installed in the lock block.

[0013] Preferably: the locking block is fixedly mounted on the lower plastic shell, a connecting plate is fixedly mounted on the locking plate, a guide rod is fixedly mounted on the connecting plate, a side end of the guide rod passes through the upper plastic shell for sliding installation, a spring is sleeved on the guide rod, and the spring is fixedly mounted between the connecting plate and the upper plastic shell.

[0014] Preferably: both sides of the lower plastic shell are penetrated by push rods that are slidably installed, and wedge blocks are fixedly installed on the two push rods, the lower ends of the two push rods are fitted with two extrusion rods, and the two wedge blocks are fitted with locking plates in two sets of clamping mechanisms.

[0015] (III) Beneficial effects

[0016] 1. The present invention installs the circuit breaker to the specified position and fixes the lower molded case and the upper molded case at the same time. There is no need to spend time to fix the lower molded case and the upper molded case after completing the installation of the main body. This can make the entire installation process more compact and coherent, reduce additional operating steps and time consumption, and significantly improve installation efficiency, especially in large electrical projects that need to install a large number of circuit breakers.

[0017] 2. The present invention enables the circuit breaker to be installed differently in different electrical equipment layouts and distribution cabinet designs by providing a second L-shaped clamping plate and a first L-shaped clamping plate at the lower end of the lower plastic shell. In some scenarios, standard DIN rails are provided for installing various electrical components. In this case, the circuit breaker can be conveniently mounted on the slide rails. In some places where there are no slide rails but there are flat installation surfaces, such as special distribution boxes, specific areas of electrical control cabinets, etc., the circuit breaker can be firmly placed in place through flat installation.

[0018] 3: The present invention can quickly disassemble the circuit breaker by providing a push rod and a wedge block as well as a locking plate and a locking block. When the internal parts of the circuit breaker fail or need regular maintenance, the easy-to-disassemble structure allows maintenance personnel to quickly open the lower plastic shell and the upper plastic shell and directly access the internal parts, thereby reducing unnecessary operations and time waste during the disassembly process. Compared with circuit breakers that are difficult to disassemble, it can greatly improve the efficiency of maintenance work and reduce equipment downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural diagram of the whole invention;

[0021] Figure 2 This is a structural diagram of the lower plastic shell of the present invention;

[0022] Figure 3 is a structural diagram of a second L-shaped clamping plate of the present invention;

[0023] Figure 4 It is a structural diagram of the first L-shaped clamping plate of the present invention;

[0024] Figure 5 This is a structural diagram of the upper plastic shell of the present invention;

[0025] Figure 6 is a structural diagram of the first slot of the present invention;

[0026] Figure 7 For the present invention Figure 5 A magnified view of the structure at A;

[0027] Figure 8 For the present invention Figure 6 Enlarged view of the structure at B.

[0028] Legend: 11. Lower plastic shell; 12. First L-shaped clamping plate; 13. T-shaped block; 14. Fixing plate; 15. Latch; 16. Push rod; 17. Locking block; 18. Wedge block; 21. Threaded rod; 22. Limiting plate; 23. Convex groove; 24. T-shaped groove; 25. Second L-shaped clamping plate; 26. Extrusion rod; 31. Upper plastic shell; 32. First slot; 33. T-shaped socket; 34. Locking plate; 35. Connecting plate; 36. Guide rod; 37. Spring; 41. Manual lever. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0030] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in view of the problems existing in the prior art, the present invention provides a dustproof molded case circuit breaker that is easy to maintain parts, including a lower molded case 11, an upper molded case 31 is provided on the lower molded case 11, a manual lever 41 is provided on the upper molded case 31, a fixing plate 14 is hinged at the lower end of the lower molded case 11, a threaded rod 21 is installed on the fixing plate 14 through a thread, a limit plate 22 is fixedly installed on the threaded rod 21, a second L-shaped clamping plate 25 is provided at the lower end of the lower molded case 11, a convex groove 23 is provided on the second L-shaped clamping plate 25, the limit plate 22 is rotatably installed in the convex groove 23 provided in the second L-shaped clamping plate 25, two T-shaped grooves 24 are provided on the second L-shaped clamping plate 25, extrusion rods 26 are slidably installed in the two T-shaped grooves 24 provided in the second L-shaped clamping plate 25, and the two extrusion rods 26 are fixedly installed At the lower end of the lower plastic shell 11, two extrusion rods 26 are fixedly installed on the second L-shaped clamping plate 25, and the side ends of the two extrusion rods 26 are provided with inclined surfaces. Both sides of the inner wall of the upper plastic shell 31 are provided with a clamping mechanism, and the clamping mechanism includes a locking plate 34, and the locking plate 34 is slidably installed in the upper plastic shell 31. A T-shaped socket 33 is provided at the lower end of the upper plastic shell 31. A sealing layer is provided between the lower plastic shell 11 and the upper plastic shell 31 in the dustproof molded case circuit breaker, so that the circuit breaker is dustproof when in use. When the dustproof molded case circuit breaker is in use, the power line and the load line are directly connected to the connector of the circuit breaker base and fastened with screws. After the circuit breaker is closed manually or electrically, its internal mechanical structure will keep the contacts in a closed state to ensure the normal conduction of the circuit, and then it can be used.

[0031] The lower end of the lower plastic shell 11 is hinged with a first L-shaped clamping plate 12, and the lower end of the upper plastic shell 31 is provided with a first slot 32. A latch 15 is fixedly installed on the lower plastic shell 11, and the latch 15 is installed in the first slot 32 provided in the upper plastic shell 31. A lock block 17 is slidably installed in the T-shaped socket 33 provided in the upper plastic shell 31, and a lock plate 34 is limitedly installed in the lock block 17. The device can be installed on a slide rail or on a plane by bolts through multiple structures provided at the lower end. When it needs to be installed on a slide rail, such as Figure 2 As shown, the second L-shaped clamping plate 25 is slidably installed on the two T-shaped blocks 13 through the T-shaped groove 24, and then the threaded rod 21 is bent to make the threaded rod 21 perpendicular to the bottom surface of the lower plastic shell 11, and then the threaded rod 21 is rotated and installed in the fixing plate 14 through the threaded connection between the threaded rod 21 and the fixing plate 14. At this time, the first L-shaped clamping plate 12 is flipped over and is perpendicular to the bottom surface of the lower plastic shell 11 after flipping, and then the lower plastic shell 11 is placed on the slide rail, and the threaded rod 21 is rotated and installed in the convex groove 2 opened in the second L-shaped clamping plate 25 through the threaded connection between the threaded rod 21 and the fixing plate 14, and the limit plate 22 is rotated and installed in the convex groove 2 opened in the second L-shaped clamping plate 25. 3, so that the second L-shaped clamping plate 25 can be moved without rotating, so as to clamp the slide rail. At this time, the device can be installed on the slide rail through the first L-shaped clamping plate 12 and the second L-shaped clamping plate 25. The present invention installs the circuit breaker to the specified position and fixes the lower molded shell 11 and the upper molded shell 31 at the same time. There is no need to spend time to fix the lower molded shell 11 and the upper molded shell 31 separately after completing the installation of the main body. This can make the entire installation process more compact and coherent, reduce additional operating steps and time consumption, and can significantly improve the installation efficiency, especially in large electrical projects where a large number of circuit breakers need to be installed.

[0032] The locking block 17 is fixedly mounted on the lower plastic shell 11, and a connecting plate 35 is fixedly mounted on the lock plate 34. A guide rod 36 is fixedly mounted on the connecting plate 35. The side end of the guide rod 36 passes through the upper plastic shell 31 for sliding installation. A spring 37 is sleeved on the guide rod 36. The spring 37 is fixedly mounted between the connecting plate 35 and the upper plastic shell 31. Both sides of the lower plastic shell 11 pass through and slide through push rods 16. Wedge blocks 18 are fixedly mounted on the two push rods 16. The lower ends of the two push rods 16 are fitted with two extrusion rods 26. The two wedge blocks 18 are fitted with the locking plates 34 in the two sets of clamping mechanisms. When it needs to be installed on a flat mounting plate, it is only necessary to separate the threaded rod 21 from the fixed plate 14, and then remove the second L-shaped clamping plate 25 and the threaded rod 21 from the lower plastic shell 1 1, and then the fixing plate 14 and the first L-shaped clamping plate 12 are turned over so that the fixing plate 14 and the first L-shaped clamping plate 12 are parallel to the bottom surface of the lower plastic shell 11. At this time, the bottom surface of the lower plastic shell 11 will be in contact with the installation plane, so that the lower plastic shell 11 can be installed on the plane using bolts. The present invention enables the circuit breaker to be installed differently in different electrical equipment layouts and distribution cabinet designs by providing the second L-shaped clamping plate 25 and the first L-shaped clamping plate 12 at the lower end of the lower plastic shell 11. Some scenes provide standard DIN rails for installing various electrical components. At this time, the circuit breaker can be conveniently mounted on the slide rails, while in some places without slide rails but with flat installation planes, such as special distribution boxes and electrical control cabinets. The circuit breaker can be firmly placed in place by plane installation. The device can unlock and lock the lower plastic shell 11 and the upper plastic shell 31 during installation. When the parts inside the circuit breaker are maintained, the housing of the circuit breaker needs to be disassembled. The user disassembles the lower plastic shell 11. When the device is installed with the slide rail, the user rotates the threaded rod 21, and through the threaded connection between the threaded rod 21 and the fixed plate 14, the second L-shaped clamping plate 25 moves in the opposite direction of the first L-shaped clamping plate 12. At this time, the second L-shaped clamping plate 25 will drive the two extrusion rods 26 to move. At this time, the two extrusion rods 26 will move away from the lower ends of the two ejector rods 16. At this time, the two ejector rods 16 are under the action of gravity and the spring 3 The lock plate 34 and the lock block 17 are unlocked, and then the lower plastic shell 11 and the upper plastic shell 31 can be pried apart by the prying plate, and the parts inside can be maintained. When the device is installed on the flat mounting plate, it only needs to be separated from the flat mounting plate to unlock the lock plate 34 and the lock block 17. The present invention can quickly disassemble the circuit breaker by setting the push rod 16 and the wedge block 18 as well as the lock plate 34 and the lock block 17. When the internal parts of the circuit breaker fail or need regular maintenance,The easy-to-disassemble structure allows maintenance personnel to quickly open the lower plastic shell 11 and the upper plastic shell 31 and directly access the internal parts, reducing unnecessary operations and time waste during the disassembly process. Compared with circuit breakers that are difficult to disassemble, it can greatly improve the efficiency of maintenance work and reduce equipment downtime.

[0033] Working principle:

[0034] In the first step, a sealing layer is provided between the lower molded case 11 and the upper molded case 31 in the dustproof molded case circuit breaker, so that the circuit breaker is dustproof when in use. When the dustproof molded case circuit breaker is in use, the power line and the load line are directly connected to the connector of the circuit breaker base and fastened with screws. After the circuit breaker is closed manually or electrically, its internal mechanical structure will keep the contacts in a closed state to ensure the normal conduction of the circuit, and then it can be used.

[0035] In the second step, the device is provided with multiple structures at the lower end so that the device can be installed on the slide rail or on the plane by bolts. When it is required to be installed on the slide rail, such as Figure 2 As shown, the second L-shaped clamping plate 25 is slidably installed on the two T-shaped blocks 13 through the T-shaped groove 24, and then the threaded rod 21 is bent to make the threaded rod 21 perpendicular to the bottom surface of the lower plastic shell 11, and then the threaded rod 21 is rotated and installed in the fixing plate 14 through the threaded connection between the threaded rod 21 and the fixing plate 14. At this time, the first L-shaped clamping plate 12 is flipped over and is perpendicular to the bottom surface of the lower plastic shell 11 after flipping, and then the lower plastic shell 11 is placed on the slide rail, and the threaded rod 21 is rotated and installed in the convex groove 2 opened in the second L-shaped clamping plate 25 through the threaded connection between the threaded rod 21 and the fixing plate 14, and the limit plate 22 is rotated and installed in the convex groove 2 opened in the second L-shaped clamping plate 25. 3, so that the second L-shaped clamping plate 25 can be moved without rotating, so as to clamp the slide rail. At this time, the device can be installed on the slide rail through the first L-shaped clamping plate 12 and the second L-shaped clamping plate 25. The present invention installs the circuit breaker to the specified position and fixes the lower molded shell 11 and the upper molded shell 31 at the same time. There is no need to spend time to fix the lower molded shell 11 and the upper molded shell 31 separately after completing the installation of the main body. This can make the entire installation process more compact and coherent, reduce additional operating steps and time consumption, and can significantly improve the installation efficiency, especially in large electrical projects where a large number of circuit breakers need to be installed.

[0036] The third step, when it is necessary to install it on a flat mounting plate, just separate the threaded rod 21 from the fixing plate 14, then take out the second L-shaped clamping plate 25 and the threaded rod 21 from the lower end of the lower plastic shell 11, and then flip the fixing plate 14 and the first L-shaped clamping plate 12 so that the fixing plate 14 and the first L-shaped clamping plate 12 are parallel to the bottom surface of the lower plastic shell 11. At this time, the bottom surface of the lower plastic shell 11 will be in contact with the installation plane, so that the lower plastic shell 11 can be installed on the plane using bolts. The present invention provides a second L-shaped clamping plate 25 and a first L-shaped clamping plate 12 at the lower end of the lower plastic shell 11, so that the circuit breaker can be installed differently in different electrical equipment layouts and distribution cabinet designs. Some scenarios provide standard DIN rails for installing various electrical components. At this time, the circuit breaker can be easily mounted on the slide rail, and in some places where there is no slide rail but there is a flat installation plane, such as a special distribution box, a specific area of ​​an electrical control cabinet, etc., the circuit breaker can be firmly in place by a flat installation method.

[0037] In the fourth step, the device can unlock and lock the lower plastic shell 11 and the upper plastic shell 31 while being installed. When the parts inside the circuit breaker are maintained, the housing of the circuit breaker needs to be disassembled. The user disassembles the lower plastic shell 11. When the device is installed with the slide rail, the user rotates the threaded rod 21, and through the threaded connection between the threaded rod 21 and the fixed plate 14, the second L-shaped clamping plate 25 moves in the opposite direction of the first L-shaped clamping plate 12. At this time, the second L-shaped clamping plate 25 will drive the two extrusion rods 26 to move. At this time, the two extrusion rods 26 will move away from the lower ends of the two ejector rods 16. At this time, the two ejector rods 16 will move downward under the action of gravity and the elastic force of the spring 37. At this time, the ejector rod 16 drives the wedge block 18 to move downward, and the wedge block 18 will be separated from the lock plate 34, and the lock plate 34 is in the spring 37. The lock plate 34 is driven out of the lock block 17 by the elastic force. At this time, the lock plate 34 and the lock block 17 are unlocked. Then, the lower plastic shell 11 and the upper plastic shell 31 can be pried open by the pry plate to maintain the internal parts. When the device is installed on the flat mounting plate, it is only necessary to separate the device from the flat mounting plate to unlock the lock plate 34 and the lock block 17. The present invention can quickly disassemble the circuit breaker through the set push rod 16 and wedge block 18 as well as the lock plate 34 and the lock block 17. When the internal parts of the circuit breaker fail or need regular maintenance, the easy-to-disassemble structure allows maintenance personnel to quickly open the lower plastic shell 11 and the upper plastic shell 31 and directly contact the internal parts, thereby reducing unnecessary operations and time waste during the disassembly process. Compared with circuit breakers that are difficult to disassemble, it can greatly improve the efficiency of maintenance work and reduce equipment downtime.

[0038] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A dustproof molded case circuit breaker for easy maintenance of parts, comprising a lower molded case (11), characterized in that: An upper plastic shell (31) is provided on the lower plastic shell (11), and a manual lever (41) is provided on the upper plastic shell (31); The lower end of the lower plastic shell (11) is hinged with a fixing plate (14), a threaded rod (21) is installed on the fixing plate (14) through a thread, a limit plate (22) is fixedly installed on the threaded rod (21), a second L-shaped clamping plate (25) is provided at the lower end of the lower plastic shell (11), a convex groove (23) is provided on the second L-shaped clamping plate (25), the limit plate (22) is rotatably installed in the convex groove (23) provided on the second L-shaped clamping plate (25), the second L-shaped clamping plate (25) is provided with two T-shaped grooves (24), and T-shaped blocks (13) are slidably installed in the two T-shaped grooves (24) provided on the second L-shaped clamping plate (25), and the two T-shaped blocks (13) are fixedly installed at the lower end of the lower plastic shell (11); Wherein, two extrusion rods (26) are fixedly mounted on the second L-shaped clamping plate (25), and the side ends of the two extrusion rods (26) are provided with inclined surfaces. Both sides of the inner wall of the upper plastic shell (31) are provided with a clamping mechanism, and the clamping mechanism includes a locking plate (34). The locking plate (34) is slidably mounted in the upper plastic shell (31), and a T-shaped plug hole (33) is opened at the lower end of the upper plastic shell (31); A locking block (17) is slidably mounted in a T-shaped socket (33) provided in the upper plastic shell (31); the locking plate (34) is limitedly mounted in the locking block (17); the locking block (17) is fixedly mounted on the lower plastic shell (11); a connecting plate (35) is fixedly mounted on the locking plate (34); a guide rod (36) is fixedly mounted on the connecting plate (35); a side end of the guide rod (36) passes through the upper plastic shell (31) slidably mounted thereon; a spring (37) is sleeved on the guide rod (36); and the spring (37) is fixedly mounted between the connecting plate (35) and the upper plastic shell (31).

2. A dustproof molded case circuit breaker for easy maintenance of parts according to claim 1, characterized in that: A first L-shaped clamping plate (12) is hingedly connected to the lower end of the lower plastic shell (11).

3. A dustproof molded case circuit breaker for easy maintenance of parts according to claim 2, characterized in that: A first slot (32) is formed at the lower end of the upper plastic shell (31).

4. A dustproof molded case circuit breaker for easy maintenance of parts according to claim 3, characterized in that: A latch (15) is fixedly mounted on the lower plastic shell (11); The latch (15) is installed in a first slot (32) provided in the upper plastic shell (31).

5. A dustproof molded case circuit breaker for easy maintenance of parts according to claim 4, characterized in that: Both sides of the lower plastic shell (11) are penetrated by push rods (16) that are slidably installed; Wherein, a wedge block (18) is fixedly mounted on each of the two push rods (16).

6. A dustproof molded case circuit breaker for easy maintenance of parts according to claim 5, characterized in that: The lower ends of the two push rods (16) are in contact with the two extrusion rods (26); The two wedge-shaped blocks (18) are fitted with locking plates (34) in two sets of clamping mechanisms.

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