WO2022205757A1

WO2022205757A1 - Operating mechanism of 2p2 modulus electromagnetic residual current circuit breaker with overcurrent protection

Info

Publication number: WO2022205757A1
Application number: PCT/CN2021/114977
Authority: WO
Inventors: 刘锋
Original assignee: 英特曼电工（常州）有限公司
Priority date: 2021-03-31
Filing date: 2021-08-27
Publication date: 2022-10-06
Also published as: EP4089709A1; CN112967912A; EP4089709B1; EP4089709A4; EP4089709C0

Abstract

The present invention relates to an operating mechanism of a 2P2 modulus electromagnetic residual current circuit breaker with overcurrent protection, comprising a handle, a link and a contact lever and characterized in that: a first hinge linkage shaft is provided in the middle of the contact lever; a first lock and a second lock are linked with the contact lever; a relative linkage structure is provided between the first lock and the second lock; the other end of the contact lever relative to the link is provided with a second hinge linkage shaft; a first movable contact and a second movable contact are linked with the contact lever; and a second hinge linkage shaft sleeve is provided with a first reset spring and a second reset spring. The beneficial effect of the present invention is: provided is an operating mechanism of a 2P2 modulus electromagnetic residual current circuit breaker with overcurrent protection, such that a single handle can control a multi-phase circuit breaker, the structure is simplified, the overall structure complexity of the circuit breaker is reduced, the number of parts is reduced, cost is reduced, and processing and assembling are convenient.

Description

An operating mechanism of a 2P2 analog-digital electromagnetic leakage protection circuit breaker

technical field

The invention relates to the technical field of circuit breakers, in particular to an operating mechanism of a 2P2 modulus electromagnetic leakage protection circuit breaker.

Background technique

Residual current circuit breaker (RCBO), also known as residual current circuit breaker and residual current protector, is mainly used to protect the circuit or motor from overload or short circuit in the event of leakage fault of equipment and electric shock protection for persons with fatal danger. It can also be used for infrequent switching of the line under normal circumstances. The leakage protection circuit breaker generally includes a casing, and the circuit breaker device and the leakage protection device are distributed in the casing. The circuit breaker device is used to control the on-off of the moving contact and the static contact during short circuit, overload or infrequent starting of the line. , and the leakage protection device is used to control the on-off of moving contacts and static contacts when leakage occurs.

The circuit breaker device generally includes an operating mechanism, a thermal tripping mechanism, an electromagnetic tripping mechanism and an arc extinguishing system. The operating mechanism includes a handle, a contact lever, and a lock. The linkage structure can control the on-off of the moving contact and the static contact, and the lock is used to link the leakage protection device with the operating mechanism, so as to control the on-off of the moving contact and the static contact when there is leakage.

In the prior art, the number of parts of the circuit breaker is large. When the existing circuit breaker is provided with two or more phases, each phase circuit breaker is respectively connected with a set of handle linkage mechanisms for control, resulting in numerous handle linkage mechanisms.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an operating mechanism for a 2P2 modulus electromagnetic leakage protection circuit breaker, which can realize the control of a multi-phase circuit breaker by a single handle, simplify the structure, and reduce the overall circuit breaker. The complexity of the structure is reduced, the production of parts is reduced, the cost is reduced, and the processing and assembly are convenient.

In order to achieve the above purpose, the present invention provides the following technical solutions: an operating mechanism of a 2P2 modulus electromagnetic leakage protection circuit breaker, comprising a handle and a connecting rod whose one end is linked with the handle, and the connecting rod is linked relative to the other end of the linked handle. A contact lever is characterized in that a first hinged linkage shaft with one end hinged on the circuit breaker casing is arranged in the middle of the contact lever, and one side of the contact lever is linked with an end of the first hinged linkage shaft. The first lock, the end of the first lock intermittently interferes with the contact lever, and the contact lever is hinged to the other end of the first hinge linkage shaft relative to the other side of the first lock. The second lock of the contact lever is provided with a second hinged linkage shaft relative to the other end of the linkage link, and the side of the contact lever toward the first lock is linked with the end of the second hinged linkage shaft. A first movable contact which can be intermittently linked with the first lock, the second hinged linkage shaft is located at the hinged joint of the first movable contact and is sleeved with a first return spring that can be connected with the first movable contact, so The side of the contact lever facing the second lock is linked with a second movable contact that is hinged on the end of the second hinged linkage shaft and can be intermittently linked with the second lock, and the second hinged linkage shaft is located at the second A second return spring that can be connected with the second movable contact is sleeved at the hinge joint of the movable contact.

By adopting the above technical solution, by improving the structure of the operating mechanism, the first lock and the second lock are respectively linked to both sides of the contact lever through the two ends of the first hinged linkage shaft, and the first movable contact and the second The moving contacts are linked to both sides of the contact lever through the two ends of the second hinged linkage shaft, so that one handle can drive two sets of moving contacts, and a single handle can control the multi-phase circuit breaker, which simplifies the structure of the operating mechanism and reduces the The overall structural complexity of the circuit breaker is reduced, the production of parts and components is reduced, and the cost is reduced, and the processing and assembly are convenient.

The operating mechanism of the above-mentioned 2P2 analog-digital electromagnetic leakage protection circuit breaker can be further configured as follows: a relative linkage structure is provided between the first lock and the second lock.

The operating mechanism of the above-mentioned 2P2 analog-digital electromagnetic leakage protection circuit breaker can be further configured as follows: the relative linkage structure includes a plug-in post disposed in the middle of the second lock and facing one side of the first lock, the first lock A lock is provided with a linkage shaft hole that can be fitted with the insertion column. The contact lever can push the first lock to rotate around the first hinged linkage shaft under the driving of the connecting rod, and the second lock passes through The insertion post rotates around the first hinge linkage shaft following the first lock catch.

By adopting the above technical solution, by setting up a relative linkage structure, the first lock is urged to drive the second lock to work with the handle, so that a single handle can control a multi-phase circuit breaker, and the two-phase circuit breaker has high working synchronization, which improves the circuit breaker. safety performance.

The operating mechanism of the above-mentioned 2P2 modulus electromagnetic leakage protection circuit breaker can be further configured as follows: a side of the middle of the second lock that is away from the first lock is provided with a first push column that can be linked with the leakage protection device.

By adopting the above technical solution, the first push column is provided, the purpose is to link the leakage protection device with the circuit breaker device, so that the leakage protection device can control the multi-phase circuit breaker through the first push column when leakage occurs, so as to ensure the leakage protection device normal work.

The operating mechanism of the above-mentioned 2P2 modulus electromagnetic leakage protection circuit breaker may be further configured as follows: a flexible connection mechanism is provided between the connecting rod and the contact lever.

The operating mechanism of the above-mentioned 2P2 modulus electromagnetic leakage protection circuit breaker can be further configured as follows: the flexible connection mechanism includes a flexible linkage block whose one end is hinged with the end of the connecting rod, and the flexible linkage block is relative to the linkage of the linkage connecting rod. The other end is hinged with the contact lever.

By adopting the above technical solution, due to the connection form of the handle and the connecting rod, the movement route of the connecting rod is made to be a curve. Smooth movement to prevent jamming; among them, both ends of the flexible linkage block can perform adaptive motion under the power of both the connecting rod and the contact lever, thereby preventing jamming.

The operating mechanism of the above-mentioned 2P2 analog-digital electromagnetic leakage protection circuit breaker can be further configured as follows: the first movable contact and the second movable contact are respectively close to one end of the second hinge linkage shaft and are fixedly connected with the circuit breaker. The second push column of the intermittent linkage of the thermal tripping mechanism.

By adopting the above technical solution, by setting the second push column, the thermal tripping mechanism in the circuit breaker can realize linkage with the operating mechanism. When the overall temperature of the circuit breaker is too high, the thermal tripping mechanism can successfully drive the two moving contacts and the operating mechanism. The static contacts are separated to ensure the normal operation of the thermal tripping mechanism and improve the safety performance of the circuit breaker.

The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

1 is a (partial) schematic structural diagram of an embodiment of the present invention;

Fig. 2 is the left side view schematic diagram of Fig. 1;

Fig. 3 is the right side schematic diagram of Fig. 1;

4 is a schematic diagram of a first lock according to an embodiment of the present invention;

5 is a schematic diagram of a second lock according to an embodiment of the present invention;

6 is a schematic diagram of a contact lever according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of an assembled state according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figures 1 to 7, an operating mechanism of a 2P2 modular electromagnetic leakage protection circuit breaker includes a handle 1 and a connecting rod 2 whose one end is linked with the handle 1, and the connecting rod 2 is linked with the other end of the linked handle 1. There is a contact lever 3, and the middle of the contact lever 3 is provided with a first hinged linkage shaft 4, one end of which is hinged on the circuit breaker housing, and one side of the contact lever 3 is linked with an end of the first hinged linkage shaft 4. The end of the first lock 5 is interlocked with the contact lever 3 intermittently, and the contact lever 3 is linked with the other side of the first lock 5 that is hinged to the first lock 5. A second lock 6 at the other end of the hinged linkage shaft 4 is provided with a relative linkage structure between the first lock 5 and the second lock 6 , and the contact lever 3 is opposite to the other end of the linkage link 2 A second hinged linkage shaft 7 is provided, and the side of the contact lever 3 facing the first lock 5 is linked with a first hinged hinged on the end of the second hinged linkage shaft 7 and can be intermittently linked with the first lock 5 . The movable contact 8, the second hinged linkage shaft 7 is located at the hinged position of the first movable contact 8 and is sleeved with a first return spring 10 that can be connected with the first movable contact 8, and the contact lever 3 faces the second lock The side of the buckle 6 is linked with a second movable contact 9 that is hinged to the end of the second hinged linkage shaft 7 and can be intermittently linked with the second locking buckle 6. The second hinged linkage shaft 7 is located at the second movable contact. A second return spring 11 that can be connected with the second movable contact 9 is sleeved at the hinge joint. The relative linkage structure includes an insertion column 61 disposed in the middle of the second lock 6 and facing the side of the first lock 5 . The first lock 5 is provided with a linkage shaft hole that can be fitted with the insertion column 61 . 51. The contact lever 3 can push the first lock 5 to rotate around the first hinge linkage shaft 4 under the driving of the connecting rod 2, and the second lock 6 follows the first lock 5 through the insertion column 61. It rotates around the first hinged linkage shaft 4 . The side of the middle of the second lock 6 away from the first lock 5 is provided with a first push column 62 that can be linked with the leakage protection device. A flexible connection mechanism is provided between the connecting rod 2 and the contact lever 3 . The flexible connection mechanism includes a flexible linkage block 12 whose one end is hinged with the end of the link 2 , and the flexible linkage block 12 is hinged with the contact lever 3 relative to the other end of the linkage link 2 . A second push column 13 that can be intermittently linked with the thermal trip mechanism in the circuit breaker is fixedly connected to one end of the first movable contact and the second movable contact close to the second hinge linkage shaft 7 respectively.

Working principle: When closing, push the handle 1, and the lower end of the connecting rod 2 drives the lower end of the handle 1 to pass through the flexible linkage block 12 (push the first lock, the first lock pushes the contact lever, and the contact lever drives the moving contact and the static contact. Contact contact) pushes the contact lever 3 to rotate, the contact lever 3 pushes the first lock 5 to rotate around the first hinge linkage shaft 4, and at the same time, the first lock 5 drives the second lock through the insertion post 61 The buckle 6 rotates around the first hinge linkage shaft 4, and the first movable contact 8 and the second movable contact 9 are respectively driven by the first lock 5 and the second lock 6 to be in contact with the static contact, that is, the closing is completed. brake. The whole process is simple to operate, and one handle can drive two sets of moving contacts, so that a single handle can control the multi-phase circuit breaker, which simplifies the structure of the operating mechanism, reduces the overall structural complexity of the circuit breaker, reduces the generation of parts, and reduces the cost, and easy to process and assemble.

Claims

An operating mechanism of a 2P2 modulus electromagnetic leakage protection circuit breaker, comprising a handle and a connecting rod linked with the handle at one end, the connecting rod is linked with a contact lever relative to the other end of the linkage handle, and is characterized in that: the contact The middle part of the lever is provided with a first hinged linkage shaft whose one end is hinged on the circuit breaker casing, and one side of the contact lever is linked with a first lock hinged on the end of the first hinged linkage shaft. The contact lever is interlocked with the contact lever intermittently, and the contact lever is linked with a second lock hinged on the other end of the first hinged linkage shaft relative to the other side of the linked first lock. The other end of the linkage link is provided with a second hinged linkage shaft, and the side of the contact lever facing the first lock is linked with a second hinged linkage shaft end and can be intermittently linked with the first lock. A movable contact, the second hinge linkage shaft is located at the hinge of the first movable contact and is sleeved with a first return spring that can be connected with the first movable contact, and the contact lever is linked toward the side of the second lock There is a second movable contact hinged on the end of the second hinged linkage shaft and can be intermittently linked with the second lock. The second hinged linkage shaft is located at the hinge of the second movable contact The second return spring of the contact.
The operating mechanism of a 2P2 analog-digital electromagnetic leakage protection circuit breaker according to claim 1, wherein a relative linkage structure is provided between the first lock and the second lock.
The operating mechanism of a 2P2 analog-digital electromagnetic leakage protection circuit breaker according to claim 2, wherein the relative linkage structure comprises a plug-in connector disposed in the middle of the second lock and facing one side of the first lock The first lock is provided with a linkage shaft hole that can be fitted with the insertion column, and the contact lever can push the first lock to rotate around the first hinged linkage shaft under the driving of the connecting rod. The second lock follows the first lock to rotate around the first hinge linkage shaft through the plug-in column.
The operating mechanism of a 2P2 analog-digital electromagnetic leakage protection circuit breaker according to claim 3, wherein a side of the middle of the second lock that is away from the first lock is provided with a mechanism that can be linked with the leakage protection device. The first push column.
The operating mechanism of a 2P2 analog-digital electromagnetic leakage protection circuit breaker according to claim 1, wherein a flexible connection mechanism is provided between the connecting rod and the contact lever.
The operating mechanism of a 2P2 analog-digital electromagnetic leakage protection circuit breaker according to claim 5, wherein the flexible connection mechanism comprises a flexible linkage block whose one end is hinged with the end of the connecting rod, and the flexible linkage block is opposite to The other end of the linkage link is hinged with the contact lever.
The operating mechanism of a 2P2 analog-digital electromagnetic leakage protection circuit breaker according to claim 1, wherein the first movable contact and the second movable contact are respectively fixed to one end close to the second hinge linkage shaft. A second push post that is intermittently interlockable with the thermal trip mechanism in the circuit breaker.