Circuit breaker with counting function

Abstract

A circuit breaker with a counting function belongs to the technical field of low-voltage electric appliances. Comprising a shell, an operating mechanism and instantaneous trips which are arranged according to the number of poles and used for detecting abnormal current of a circuit, the circuit breaker further comprises an actuating rod connected with the instantaneous trips of all the poles and a counting device, the instantaneous trips enable the actuating rod to act when detecting short-circuit current, the actuating rod actuates the operating mechanism, and the counting device counts the short-circuit current. The circuit breaker is tripped to cut off the circuit while the actuating lever actuates the counting device to count. The circuit breaker has the advantages that when short-circuit current is broken, the actuating rod drives the operating mechanism to act to enable the circuit breaker to cut off a circuit, and meanwhile, the actuating rod actuates the counting device to count the tripping times, so that the problem that the tripping times of the circuit breaker are difficult to count in the prior art is solved; moreover, when the specified tripping times are reached, the counting device can lock the operating mechanism and cannot be re-buckled.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and in particular relates to a circuit breaker with a counting function. Background Art

[0002] Circuit breakers are overload, short circuit and undervoltage protection devices in low-voltage power distribution systems. Their structure is generally composed of a contact system, an arc extinguishing device, an operating mechanism, a tripping device, etc. When a short circuit occurs in the line, the short-circuit current flows through the tripping device, the tripping device operates, the operating mechanism trips, and the circuit breaker trips, thereby protecting the line and load where the circuit breaker is located. The number of times a circuit breaker is operated is an important indicator for evaluating the state of the circuit breaker and an important basis for the maintenance of the circuit breaker. The circuit breaker operation regulations also clearly stipulate that production and operation personnel must regularly record the number of times the circuit breaker is operated and save it as an important motion state quantity. In actual use, circuit breakers frequently connect and disconnect the current in the normal circuit. However, ordinary thermal magnetic circuit breakers on the market currently do not have the function of counting the number of trips. The use status depends on the user's subjective impression, and the user is often unable to judge the use status of the circuit breaker, especially when a short circuit occurs in the line. When the circuit breaker breaks the short-circuit current, it is easy to cause the moving and static contacts of the circuit breaker to burn, causing poor contact or damage to the circuit breaker. If it is not repaired or replaced in time, it will affect the use of related electrical products. Therefore, the statistics of the number of circuit breaker tripping times are very important to maintain circuit safety.

[0003] In view of the above-mentioned prior art, it is necessary to improve the structure of the existing circuit breaker. To this end, the applicant has made a useful design. The technical solution to be introduced below is produced in this context. Utility Model Content

[0004] The utility model aims to provide a circuit breaker with a counting function, which can count the number of tripping times of short-circuit faults and limit the number of tripping times.

[0005] The purpose of the utility model is achieved in this way. A circuit breaker with a counting function comprises a housing, an operating mechanism and an instantaneous release arranged according to the number of poles for detecting abnormal current in a circuit. The circuit breaker also comprises an actuating rod connected to the instantaneous release of each pole and a counting device. When the instantaneous release detects a short-circuit current, the actuating rod actuates the operating mechanism to trip the circuit breaker to cut off the circuit, and at the same time, the actuating rod actuates the counting device to count.

[0006] In a specific embodiment of the utility model, it also includes a striking rod, and the actuating rod is provided with a striking part and a buckle part, and the buckle part is buckled with the striking rod. When the short-circuit current is disconnected, the moving iron core on the instantaneous release strikes the striking part on the actuating rod to pivot the actuating rod. At this time, the buckle part is disengaged from the striking rod, and the striking rod actuates the operating mechanism to cut off the circuit.

[0007] In another specific embodiment of the utility model, the counting device is provided with a first push rod, the actuating rod is provided with an actuating portion corresponding to the first push rod, and the actuating portion cooperates with the first push rod to actuate the counting device to count.

[0008] In another specific embodiment of the utility model, a second push rod is provided on the counting device, and a push rod is provided on the striking rod. When the striking rod is moved, the push rod pushes the second push rod on the counting device to activate the counting device to count.

[0009] In another specific embodiment of the utility model, the operating mechanism further comprises a traction rod which drives the operating mechanism to disengage after rotation, and the counting device is provided with a pull rod at a position corresponding to the traction rod, and the pull rod cooperates with the traction rod to lock or unlock the traction rod.

[0010] In another specific embodiment of the present utility model, the shell includes a middle cover, the middle cover is provided with a accommodating cavity, and the counting device is embedded in the accommodating cavity.

[0011] In a further specific embodiment of the present invention, a counting panel is provided on the counting device for displaying the counting times.

[0012] In a further specific embodiment of the present invention, the housing further comprises a small cover, and the small cover is provided with an observation window corresponding to the counting panel.

[0013] Due to the adoption of the above structure, the utility model has the following beneficial effects compared with the prior art: when the short-circuit current is disconnected, the actuating rod drives the operating mechanism to operate, so that the circuit breaker cuts off the circuit, and at the same time, the actuating rod actuates the counting device to count the number of tripping times, thereby solving the problem in the prior art that it is difficult to count the number of tripping times of the circuit breaker; and when the specified number of tripping times is reached, the counting device can lock the operating mechanism so that it cannot be tripped again. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the general assembly structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the connection structure of the instantaneous release, the operating mechanism and the counting device in one embodiment of the utility model;

[0016] Figure 3 It is a structural schematic diagram of a counting device according to an embodiment of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the small cover panel of the utility model;

[0018] Figure 5 It is a schematic diagram of the connection structure of the instantaneous release, the operating mechanism and the counting device of another embodiment of the utility model;

[0019] Figure 6 It is a structural schematic diagram of a counting device of another embodiment of the utility model;

[0020] Figure 7 It is a schematic diagram of the connection structure of the operating mechanism and the counting device of another embodiment of the utility model.

[0021] In the figure: 1. shell, 11. middle cover, 111. accommodating chamber, 12. base, 13. small cover, 131. observation window; 2. operating mechanism, 21. traction rod, 211. pushing part, 212. stopper; 3. instantaneous release, 31. moving iron core, 32. static iron core; 4. counting device, 41a. first push rod, 41b. second push rod, 42. pull rod, 43. counting panel; 5. actuating rod, 51. actuating part, 52. striking part, 53. buckle part; 6. striking rod, 61. pushing rod. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0023] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are referring to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solutions provided by the present utility model. Embodiment 1:

[0024] Please see Figure 1 , Figure 2 and Figure 3The utility model relates to a circuit breaker with a counting function, the circuit breaker comprises a housing 1, an operating mechanism 2, and an instantaneous release 3. The housing 1 comprises a middle cover 11 and a base 12. The operating mechanism 2 and the instantaneous release 3 are arranged in the base 12. The operating mechanism 2 drives the moving and static contacts of the circuit breaker to contact and separate, so that the circuit breaker completes the closing and opening operations. The instantaneous release 3 is arranged according to the number of poles and is used to detect abnormal current in the circuit. The utility model takes a three-pole circuit breaker as an example, and the number of instantaneous releases 3 is 3. The circuit breaker also includes an actuating rod 5 connected to the instantaneous release 3 of each pole and a counting device 4. The middle cover 11 is provided with a receiving cavity 111 for receiving the counting device 4. When the instantaneous release 3 detects a short-circuit current, the actuating rod 5 actuates the operating mechanism 2 to trip the circuit breaker to cut off the circuit, and the actuating rod 5 actuates the counting device 4 to count.

[0025] Furthermore, the operating mechanism 2 also has a traction rod 21 that drives the operating mechanism 2 to trip after rotation. The instantaneous release 3 includes a moving iron core 31 (also called an armature) and a stationary iron core 32 (also called a yoke). The actuating rod 5 is provided with a striking portion 52 and a buckle portion 53. The circuit breaker also includes a striking rod 6. The buckle portion 53 on the actuating rod 5 is buckled with the striking rod 6. After the striking rod 6 is buckled with the buckle portion 53, the spring (not shown in the figure) arranged below stores energy. When the circuit breaker is breaking the short-circuit current, the moving iron core 31 on the instantaneous release 3 is attracted with the static iron core 32, and the moving iron core 31 strikes the striking portion 52 on the actuating rod 5 during the movement toward the static iron core 32, so that the actuating rod 5 pivots. At this time, the buckle portion 53 on the actuating rod 5 is unlocked from the striking rod 6, and the striking rod 6 rotates the traction rod 21 on the actuating operating mechanism 2 under the action of the spring force, so that the circuit breaker cuts off the circuit, and at the same time, the actuating rod 5 actuates the counting device 4 to count. Specifically, the counting device 4 is provided with a first push rod 41a, and the actuating rod 5 is provided with an actuating portion 51 corresponding to the first push rod 41a, and the actuating portion 51 cooperates with the first push rod 41a to push the first push rod 41a to actuate the counting device 4 to count.

[0026] See you next time Figure 2 and Figure 3 Furthermore, the counting device 4 is provided with a pull rod 42, which is assembled with the traction rod 21 on the operating mechanism 2 to lock or unlock the traction rod 21. The pull rod 42 is preferably L-shaped, and when the counting device 4 counts to a specified number of times, the specified number of times is preferably 3 times, that is, when the counting device 4 counts to 3 times, the pull rod 42 is actuated to lock the traction rod 21 in the tripped position, the traction rod 21 cannot be reset, and the circuit breaker cannot be re-tripped.

[0027] Please see Figure 3 and Figure 4The counting device 4 is provided with a counting panel 43. The counting device 4 is operated to record once each time the circuit breaker trips as a cycle, and the counting panel 43 displays the current number of circuit breaker operations. The housing 1 also includes a small cover 13, and the small cover 13 is provided with an observation window 131 corresponding to the counting panel 43. The current number of circuit breaker operations can be observed through the observation window 131. Embodiment 2:

[0028] Please see Figure 5 and Figure 6 In this embodiment, the striking rod 6 actuates the counting device 4 to count. Further, the striking rod 6 is provided with a push rod 61, and the counting device 4 is provided with a second push rod 41b. When the striking rod 6 is actuated to trip the circuit breaker, the push rod 61 pushes the second push rod 41b to move, thereby actuating the counting device 4 to count. The rest is the same as in Embodiment 1. Embodiment 3:

[0029] Please refer to Figure 7 In this embodiment, the circuit breaker adopts a single magnetic release (not shown in the figure). When the circuit breaker breaks the short-circuit current, the moving and static iron cores of the single magnetic release are attracted, and the moving iron core of the single magnetic release hits the traction rod 21 of the operating mechanism 2 to cause the operating mechanism 2 to trip. During the rotation of the traction rod 21, the pushing portion 211 on it pushes the first push rod 41a on the counting device 4 to move, causing the counting device 4 to count. When the counting device 4 counts to 3 times, the pull rod 42 on the counting device 4 acts to cooperate with the stop portion 212 of the traction rod 21 to lock the traction rod 21 in the tripping position, the traction rod 21 cannot be reset, and the circuit breaker cannot be re-locked.

Claims

1. A circuit breaker with a counting function, comprising a housing (1), an operating mechanism (2) and an instantaneous release (3) arranged according to the number of poles for detecting abnormal current in a circuit, characterized in that: The circuit breaker further comprises an actuating rod (5) connected to the instantaneous release (3) of each pole and a counting device (4); the instantaneous release (3) causes the actuating rod (5) to actuate when a short-circuit current is detected, and the actuating rod (5) actuates the operating mechanism (2) to trip the circuit breaker to cut off the circuit; at the same time, the actuating rod (5) actuates the counting device (4) to count.

2. A circuit breaker with counting function according to claim 1, characterized in that: The invention also comprises a striking rod (6), wherein the actuating rod (5) is provided with a striking portion (52) and a buckle portion (53), wherein the buckle portion (53) is buckled with the striking rod (6), and when the short-circuit current is disconnected, the moving iron core (31) on the instantaneous release (3) strikes the striking portion (52) on the actuating rod (5), causing the actuating rod (5) to pivot, and at this time the buckle portion (53) is unlocked from the striking rod (6), and the striking rod (6) actuates the operating mechanism (2) to cut off the circuit.

3. A circuit breaker with counting function according to claim 2, characterized in that: The counting device (4) is provided with a first push rod (41a), and the actuating rod (5) is provided with an actuating portion (51) corresponding to the first push rod (41a). The actuating portion (51) cooperates with the first push rod (41a) to actuate the counting device (4) to count.

4. A circuit breaker with counting function according to claim 2, characterized in that: The counting device (4) is provided with a second push rod (41b), and the striking rod (6) is provided with a push rod (61). When the striking rod (6) moves, the push rod (61) pushes the second push rod (41b) on the counting device (4), thereby activating the counting device (4) to count.

5. A circuit breaker with counting function according to claim 3 or 4, characterized in that: The operating mechanism (2) also has a traction rod (21) that drives the operating mechanism (2) to release after rotation, and the counting device (4) is provided with a pull rod (42) at a position corresponding to the traction rod (21), and the pull rod (42) cooperates with the traction rod (21) to lock or unlock the traction rod (21).

6. A circuit breaker with counting function according to claim 1, characterized in that: The housing (1) comprises a middle cover (11), the middle cover (11) is provided with a receiving cavity (111), and the counting device (4) is embedded in the receiving cavity (111).

7. A circuit breaker with counting function according to claim 1, characterized in that: The counting device (4) is provided with a counting panel (43) for displaying the number of counts.

8. A circuit breaker with counting function according to claim 7, characterized in that: The housing (1) further comprises a small cover (13), and the small cover (13) is provided with an observation window (131) corresponding to the counting panel (43).

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