Circuit breaker opening tripping device with overcurrent protection

Abstract

The utility model discloses a circuit breaker opening tripping device with overcurrent protection, which comprises a three-phase opening electromagnet, a tripping mechanism and a tripping transmission mechanism, the three-phase opening electromagnet is connected with a three-phase mechanism of a circuit breaker main loop, the three-phase opening electromagnet is respectively linked with the tripping mechanism, the tripping transmission mechanism is connected with the tripping mechanism, and the tripping transmission mechanism is connected with the tripping mechanism. When any phase of the three-phase mechanism has an overcurrent problem, the corresponding opening electromagnet receives an overcurrent signal and pushes the tripping mechanism to move upwards, and the tripping transmission mechanism transmits the opening motion to the opening latch to realize the opening of the circuit breaker, so that an electric signal is converted into a mechanical signal; the device is simple, stable and reliable in structure, can effectively carry out fault opening when there is no relay protection device, and effectively improves the safety and reliability.

Description

Technical Field

[0001] The utility model belongs to the field of electrical technology and relates to a circuit breaker opening tripping device with overcurrent protection. Background Art

[0002] The mechanism must have the function of rapid opening. When used with an overcurrent protector, multiple opening electromagnets are required to operate separately to open the mechanism. However, the existing opening electromagnets are limited by the internal layout of the mechanism and the number cannot be too large. In addition, the opening electromagnets affect each other. If one of them has a problem, the entire transmission will fail. Some structures are complex and cannot operate stably. Summary of the invention

[0003] In order to overcome at least one deficiency of the prior art, the utility model provides a circuit breaker opening tripping device with overcurrent protection.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a circuit breaker tripping tripping device with overcurrent protection, including a three-phase tripping electromagnet, a tripping mechanism and a tripping transmission mechanism, the three-phase tripping electromagnet is connected to the three-phase mechanism of the circuit breaker main circuit, the three-phase tripping electromagnet is respectively linked with the tripping mechanism, the tripping transmission mechanism is connected to the tripping mechanism, and the tripping transmission mechanism is connected to the tripping mechanism of the circuit breaker.

[0005] Furthermore, the opening electromagnet is provided with a push rod, and the opening electromagnet pushes the push rod upward when receiving the overcurrent signal.

[0006] Furthermore, the tripping mechanism includes a tripping plate, which is located above the three-phase opening electromagnet, and the push rod on any phase opening electromagnet is linked to the tripping plate.

[0007] Furthermore, the tripping transmission mechanism includes a driving shaft, a transmission rod group and a clutch shaft, the tripping plate is connected to the driving shaft, the tripping plate and the driving shaft rotate synchronously, the transmission rod group is fixedly connected to the driving shaft and the clutch shaft respectively, and the clutch shaft is connected to the opening mechanism of the circuit breaker.

[0008] Furthermore, the three-phase opening electromagnet is arranged on the mechanism plate of the circuit breaker.

[0009] Furthermore, the mechanism plate includes a front mechanism plate and a rear mechanism plate, the front mechanism plate and the rear mechanism plate are fixedly connected, and the three-phase opening electromagnet is installed on the front mechanism plate.

[0010] Furthermore, the transmission rod group includes two sets of ball joint rod groups, and the two sets of ball joint rod groups are connected in sequence, and the rotation direction of the drive shaft is converted through the transmission rod group.

[0011] Furthermore, the rotation directions of the driving shaft and the clutch shaft are perpendicular.

[0012] Furthermore, the opening mechanism includes an opening brake catch, the catch shaft is rotatably connected to the mechanism plate, and the opening brake catch is fixed on the catch shaft.

[0013] Furthermore, the tripping transmission mechanism also includes a tripping frame, the tripping frame is fixedly arranged on the front mechanism plate, and the driving shaft is rotatably connected to the tripping frame.

[0014] In summary, the utility model is beneficial in that:

[0015] 1) When an overcurrent problem occurs in any phase of the three-phase mechanism of the utility model, the corresponding tripping electromagnet receives the overcurrent signal, pushes the tripping mechanism to move upward, and transmits the tripping movement to the tripping actuator through the tripping transmission mechanism to realize the circuit breaker tripping, converting the electrical signal into a mechanical signal. The structure is simple, stable and reliable, and fault tripping can be effectively performed when there is no relay protection device, effectively improving safety and reliability.

[0016] 2) The utility model installs the circuit breaker opening tripping device in front of the front mechanism plate, so that the device is placed in front, the internal space is saved, and the device is easy to disassemble and replace.

[0017] 3) The push rods on any phase opening electromagnet of the utility model are linked with the trip plate to realize independent transmission between the three-phase opening electromagnets without affecting each other, which effectively improves the safety and stable reliability of transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the circuit breaker opening tripping device of the utility model.

[0019] Markings in the figure: mechanism plate 1, three-phase opening electromagnet 2, tripping mechanism 3, tripping transmission mechanism 4, front mechanism plate 11, rear mechanism plate 12, push rod 21, tripping plate 31, tripping frame 40, driving shaft 41, transmission rod group 42, and clutch shaft 43. DETAILED DESCRIPTION

[0020] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0021] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0022] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0024] Embodiment 1:

[0025] like Figure 1 As shown, a circuit breaker tripping device with overcurrent protection includes a three-phase tripping electromagnet 2, a tripping mechanism 3 and a tripping transmission mechanism 4. The three-phase tripping electromagnet 2 is connected to the three-phase mechanism of the circuit breaker main circuit, the three-phase tripping electromagnet 2 is respectively linked with the tripping mechanism 3, the tripping transmission mechanism 4 is connected to the tripping mechanism 3, and the tripping transmission mechanism 4 is connected to the tripping mechanism of the circuit breaker.

[0026] The circuit breaker opening tripping device is arranged on the mechanism plate 1 of the circuit breaker. The mechanism plate 1 includes a front mechanism plate 11 and a rear mechanism plate 12. The front mechanism plate 11 and the rear mechanism plate 12 are fixedly connected. The main circuit of the circuit breaker is arranged between the front mechanism plate 11 and the rear mechanism plate 12. The circuit breaker opening tripping device is pre-installed on the front mechanism plate 11, which saves internal space and is easy to disassemble and replace.

[0027] like Figure 1 As shown, the three-phase opening electromagnet 2 is composed of three groups of opening electromagnets 2. The three-phase opening electromagnet 2 is connected to the three-phase mechanism of the main circuit in sequence. The opening electromagnet 2 is provided with a push rod 21. The opening electromagnet 2 controls the push rod 21 to move up and down. When an overcurrent problem occurs in any phase of the three-phase mechanism, the corresponding opening electromagnet 2 receives the overcurrent signal, pushes the push rod 21 to move up, and the push rod 21 pushes the tripping mechanism 3, and the circuit breaker is opened through the tripping transmission mechanism 4, thereby improving safety and reliability.

[0028] The tripping mechanism 3 includes a tripping plate 31, which is located above the three-phase opening electromagnet 2. The push rod 21 on any phase opening electromagnet 2 is linked with the tripping plate 31 to achieve independent transmission between the three-phase opening electromagnets 2 without affecting each other, effectively improving safety and reliability.

[0029] The tripping transmission mechanism 4 includes a driving shaft 41, a transmission rod group 42 and a clutch shaft 43. The tripping plate 31 is connected to the driving shaft 41, the tripping plate 31 rotates synchronously with the driving shaft 41, the clutch shaft 43 is rotationally connected to the mechanism plate 1, and the transmission rod group 42 is fixedly connected to the driving shaft 41 and the clutch shaft 43 respectively.

[0030] The transmission rod group 42 includes two sets of ball joint rod groups, which are connected in this way to convert the rotation direction of the driving shaft 41. The rotation directions of the driving shaft 41 and the clutch shaft 43 are perpendicular.

[0031] The clutch shaft 43 is connected to the opening mechanism of the circuit breaker. The opening mechanism includes a closing clutch (not shown). The closing clutch is fixed on the clutch shaft 43. The clutch shaft 43 drives the closing clutch to rotate to open the circuit breaker.

[0032] The tripping transmission mechanism 4 further includes a tripping frame 40 . The tripping frame 40 is fixed to the front mechanism plate 11 , and the driving shaft 41 is rotatably connected to the tripping frame 40 .

[0033] The present application installs the circuit breaker opening tripping device in front of the front mechanism plate 11, realizes the front placement of the device, saves internal space, and is easy to disassemble and replace; the push rod 21 on any phase opening electromagnet 2 of the present application is linked with the tripping plate 31, realizes independent transmission between the three-phase opening electromagnets 2 without affecting each other, effectively improves the safety and stable reliability of transmission; if an overcurrent problem occurs in any phase of the three-phase mechanism of the present application, the corresponding opening electromagnet 2 receives the overcurrent signal, pushes the tripping mechanism 3 to move up, and transmits the opening motion to the opening lever through the tripping transmission mechanism 4 to realize the circuit breaker opening, converting the electrical signal into a mechanical signal, with a simple, stable and reliable structure, and can effectively perform fault opening when there is no relay protection device, effectively improving safety and reliability.

[0034] The circuit breaker opening tripping device in this embodiment can be used alone in existing equipment. The three-phase mechanism of the circuit breaker main circuit and the unexplained structure of the opening mechanism adopt existing components and will not be described in detail here.

[0035] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A circuit breaker tripping device with overcurrent protection, Features: It includes a three-phase opening electromagnet, a tripping mechanism and a tripping transmission mechanism. The three-phase opening electromagnet is connected to the three-phase mechanism of the main circuit of the circuit breaker, the three-phase opening electromagnet is respectively linked to the tripping mechanism, the tripping transmission mechanism is connected to the tripping mechanism, and the tripping transmission mechanism is connected to the opening mechanism of the circuit breaker.

2. A circuit breaker tripping device with overcurrent protection according to claim 1, Features: The opening electromagnet is provided with a push rod, and the opening electromagnet receives an overcurrent signal to push the push rod upward.

3. A circuit breaker tripping device with overcurrent protection according to claim 2, Features: The tripping mechanism comprises a tripping plate, which is located above the three-phase opening electromagnet, and the push rod on any phase opening electromagnet is linked with the tripping plate.

4. A circuit breaker tripping device with overcurrent protection according to claim 3, Features: The tripping transmission mechanism includes a driving shaft, a transmission rod group and a clutch shaft. The tripping plate is connected to the driving shaft, the tripping plate and the driving shaft rotate synchronously, the transmission rod group is fixedly connected to the driving shaft and the clutch shaft respectively, and the clutch shaft is connected to the opening mechanism of the circuit breaker.

5. A circuit breaker tripping device with overcurrent protection according to claim 4, Features: The three-phase opening electromagnet is arranged on the mechanism plate of the circuit breaker.

6. A circuit breaker tripping device with overcurrent protection according to claim 5, Features: The mechanism plate comprises a front mechanism plate and a rear mechanism plate, the front mechanism plate and the rear mechanism plate are fixedly connected, and the three-phase opening electromagnet is installed on the front mechanism plate.

7. A circuit breaker tripping device with overcurrent protection according to claim 4, Features: The transmission rod group includes two sets of ball joint rod groups, which are connected in sequence, and the rotation direction of the drive shaft is converted through the transmission rod group.

8. A circuit breaker tripping device with overcurrent protection according to claim 4, Features: The rotation directions of the driving shaft and the clutch shaft are perpendicular.

9. A circuit breaker tripping device with overcurrent protection according to claim 4, Features: The opening mechanism comprises an opening brake catcher, the catcher shaft is rotatably connected with the mechanism plate, and the opening brake catcher is fixed on the catcher shaft.

10. A circuit breaker tripping device with overcurrent protection according to claim 6, Features: The tripping transmission mechanism also includes a tripping frame, which is fixed on the front mechanism plate, and the driving shaft is rotatably connected to the tripping frame.

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