CN118782435B - Backup protection device for circuit breaker - Google Patents
Backup protection device for circuit breaker Download PDFInfo
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- CN118782435B CN118782435B CN202411275172.XA CN202411275172A CN118782435B CN 118782435 B CN118782435 B CN 118782435B CN 202411275172 A CN202411275172 A CN 202411275172A CN 118782435 B CN118782435 B CN 118782435B
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- circuit breaker
- base
- protection device
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 91
- 230000003068 static effect Effects 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- 238000000926 separation method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- VAYOSLLFUXYJDT-RDTXWAMCSA-N Lysergic acid diethylamide Chemical class C1=CC(C=2[C@H](N(C)C[C@@H](C=2)C(=O)N(CC)CC)C2)=C3C2=CNC3=C1 VAYOSLLFUXYJDT-RDTXWAMCSA-N 0.000 description 3
- 238000005760 Tripper reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 241000234273 Dioscorea Species 0.000 description 1
- 235000005903 Dioscorea Nutrition 0.000 description 1
- 235000000504 Dioscorea villosa Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 235000004879 dioscorea Nutrition 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
本发明提供的一种断路器的后备保护装置，包括：底座；多个静铁芯，间隔设置于底座内部；传动杆组件，包括牵引轴；操作机构，包括操作杆；牵引杆组件，包括牵引杆，以及设置于牵引杆上、与多个静铁芯对应设置的动铁芯，所述牵引轴一端与牵引杆联动，另一端与操作杆联动，所述牵引轴沿着断路器的高度方向滑动设置，并且能够驱动操作杆转动。该断路器的后备保护装置能够克服现有技术中后备保护脱扣器的零部件数量较多，装配工作比较繁琐的缺陷。
The backup protection device of a circuit breaker provided by the present invention comprises: a base; a plurality of static iron cores arranged at intervals inside the base; a transmission rod assembly, comprising a traction shaft; an operating mechanism, comprising an operating rod; a traction rod assembly, comprising a traction rod, and a moving iron core arranged on the traction rod and corresponding to the plurality of static iron cores, one end of the traction shaft is linked to the traction rod, and the other end is linked to the operating rod, the traction shaft is slidably arranged along the height direction of the circuit breaker, and can drive the operating rod to rotate. The backup protection device of the circuit breaker can overcome the defects of the backup protection release in the prior art that the number of parts is large and the assembly work is relatively cumbersome.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a backup protection device of a circuit breaker.
Background
The backup protection device of the molded case circuit breaker can drive the operation mechanism to act when overload, short circuit, electronic release faults and the like occur, so as to cut off the circuit, thereby protecting electrical equipment and personnel safety.
In the utility model patent with the patent publication number of CN219226180U, an electronic circuit breaker backup protection structure is disclosed, which comprises a base, a traction rod and A, B, C three-phase separation grooves which are sequentially arranged on the base at intervals, backup protection trippers are respectively arranged in the A, B, C three-phase separation grooves, each backup protection comprises a magnetic yoke, a movable armature, a U-shaped support, a spring structure and a triggering structure, the lower end of the U-shaped support is connected with the magnetic yoke, the movable armature is hinged to the upper end of the U-shaped support through a pin shaft, the spring structure is sleeved on the pin shaft, the two ends of the spring structure are respectively extended to abut against the movable armature and the U-shaped support, after the assembly is completed, the magnetic yoke is fixed on a conductive plate of the base through screws, the number of parts of the backup protection trippers is more, the assembly process is complex, the number of the backup protection trippers is three, and the production cost is further increased.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects of more parts and more complicated assembly work of the backup protection release in the prior art, thereby providing the backup protection device of the circuit breaker, which is convenient to install.
The invention provides a backup protection device of a circuit breaker, which comprises a base, a plurality of static iron cores, a transmission rod assembly, an operating mechanism and a traction rod assembly, wherein the static iron cores are arranged in the base at intervals, the transmission rod assembly comprises a traction shaft, the operating mechanism comprises an operating rod, the traction rod assembly comprises a traction rod and movable iron cores which are arranged on the traction rod and correspond to the static iron cores, one end of the traction shaft is in linkage with the traction rod, the other end of the traction shaft is in linkage with the operating rod, and the traction shaft is arranged in a sliding mode along the height direction of the circuit breaker and can drive the operating rod to rotate.
The traction mechanism comprises a traction shaft, and is characterized in that the traction shaft comprises a traction shaft, a traction block and an operating mechanism, wherein the traction shaft is arranged on the traction shaft, the traction shaft is connected with the traction block in a parallel mode, the traction block is arranged on the traction shaft in a vertical mode, the traction block is arranged on the traction shaft in a parallel mode, the traction block is arranged on the traction shaft in a vertical mode, and the traction block is arranged on the traction shaft in a sleeved mode.
The transformer is characterized by further comprising a transformer shell, wherein the transformer shell is arranged in the base, the positioning block is arranged on the transformer shell or the base, a through groove for a traction shaft to pass through is formed in the positioning block, the traction rod is provided with a butt plate, the butt plate can be in butt joint with the base, the traction rod is provided with a first position where the movable iron core is in a short circuit state and a second position where the movable iron core is in a normal state, and when the traction rod is in the second position, the butt plate is in butt joint with the base.
Further, the static iron core is arranged in an inverted U shape, a limiting groove for the installation and entering of the static iron core is further formed in the base or the transformer shell, a fastening nail is arranged on the transformer shell, and an anti-falling gasket for preventing the static iron core from falling off is arranged at the joint of the fastening nail and the transformer shell.
Further, a slot is arranged on the bottom wall of the limit groove, an insert block inserted into the slot is arranged on the static iron core, and a separation plate for separating the two adjacent static iron cores is arranged between the adjacent static iron cores.
Further, a plurality of accommodating grooves for inserting the movable iron cores are formed in the traction rod, a clamping structure for clamping the movable iron cores in the accommodating grooves is arranged between the movable iron cores and the accommodating grooves, and the clamping structure comprises a clamping block arranged on one side wall of the movable iron cores or the side walls of the accommodating grooves and a clamping groove arranged on the other side wall of the movable iron cores or the side walls of the accommodating grooves and matched with the clamping block.
Further, a reset spring is hooked on the traction rod, and one side of the reset spring, which is back to the traction rod, is hooked on the base.
The base is further provided with a plurality of conducting strips, each conducting strip comprises a conducting strip body, a contact end arranged at one end of the conducting strip body and a positioning end arranged at the other end, the contact ends are inserted into the static iron core, and the positioning ends are connected with the base by screws.
Further, the traction rod is formed by injection molding, and a bottom cover for positioning the traction rod is arranged at the bottom of the traction rod.
Further, a reinforcing needle for preventing the traction rod from deforming is arranged in the traction rod.
The technical scheme of the invention has the following advantages:
1. The invention provides a backup protection device of a circuit breaker, when in assembly, a plurality of static iron cores are firstly arranged in a base, then an operating mechanism is fixed, a traction shaft is fixed on the base, then a plurality of movable iron cores are arranged on the same traction rod to form a traction rod assembly, and then the whole traction rod assembly is installed in the base, so that the installation of the backup protection structure part is completed.
2. According to the backup protection device for the circuit breaker, after the magnetic field between the movable iron core and the static iron core is enhanced, the movable iron core rotates to be attracted with the static iron core, the traction rod rotates, so that the second extension block pushes the traction shaft to move upwards, the first extension block is knocked at the upper position of the traction shaft, the operation rod is driven to rotate, the operation mechanism is driven to move, and finally the release is released.
3. In order to assist the traction shaft to move, the transformer shell or the base is provided with the positioning block, the positioning block is internally provided with the through groove for the traction shaft to pass through, and when the movable iron core is switched from the second position to the first position, the traction shaft moves upwards, so that the operating mechanism is driven to move, and the release is driven to release.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of a circuit breaker;
fig. 2 is a schematic structural view of a backup protection device in the circuit breaker;
fig. 3 is a schematic structural view of another embodiment of a backup protection device in a circuit breaker;
fig. 4 is a schematic cross-sectional structure of a circuit breaker;
fig. 5 is a schematic structural view of another embodiment of a backup protection device in a circuit breaker;
FIG. 6 is a diagram showing the position of a conductive sheet within a backup protection device;
FIG. 7 is a view of another angular position of the conductive sheet within the backup protection device;
fig. 8 is a schematic view of another sectional structure of the circuit breaker;
Fig. 9 is another structural schematic diagram of a backup protection device in the circuit breaker;
fig. 10 is a schematic cross-sectional structure between a stationary core and a transformer housing;
FIG. 11 is a schematic cross-sectional view of the structure between the plunger and the drawbar;
fig. 12 is a positional relationship between the return spring and the drawbar.
Reference numerals illustrate:
1. The device comprises a base, 11, an operating mechanism, 2, an avoidance groove, 3, a static iron core, 30, a separation plate, 4, a conducting plate, 41, a body, 42, a contact end, 43, a positioning end, 44, a screw, 5, a traction rod assembly, 51, a traction rod, 52, a movable iron core, 53, a reinforcing needle, 6, a transmission rod assembly, 61, a traction shaft, 62, an operating rod, 63, a first extension block, 64, a second extension block, 7, a transformer shell, 71, a positioning block, 72, a penetration groove, 73, a limiting pin, 731, an abutting plate, 74, a limiting groove, 75, a fastening nail, 750, an anti-falling gasket, 76, an inserting block, 77, a slot, 8, an extension rod, 9, a containing groove, 91, a clamping block, 92, a clamping groove, 93, a guiding inclined plane, 94, a reset spring, 95, a bottom cover, 96, a clamping wheel, 97, an extension plate and 98 and an isolation plate.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Examples
The embodiment provides a backup protection device of a circuit breaker, which comprises a base 1, a plurality of static iron cores 3 arranged in the base 1 at intervals, a transmission rod assembly 6 comprising a traction shaft 61, an operating mechanism 11 comprising an operating rod 62, and a traction rod assembly 5 comprising a traction rod 51 and a movable iron core 52 arranged on the traction rod 51 and corresponding to the plurality of static iron cores 3, wherein one end of the traction shaft 61 is linked with the traction rod 51, the other end of the traction shaft 61 is linked with the operating rod 62, and the traction shaft 61 is slidably arranged along the height direction of the circuit breaker and can drive the operating rod 62 to rotate.
The specific improvement is that, as shown in fig. 1-5, compared with the prior art, when in assembly, a plurality of static iron cores 3 are firstly installed in a base 1, then an operating mechanism 11 is fixed, a traction shaft 61 is fixed on the base 1, then a plurality of movable iron cores 52 are installed on the same traction rod 51 to form a traction rod assembly 5, and then the whole traction rod assembly 5 is installed in the base 1, so that the installation of a backup protection structure part is completed.
On the basis of the embodiment, the operating mechanism 11 further comprises an extension rod 8 positioned on the operating rod 62, a first extension block 63 capable of contacting with the upper end of the traction shaft 61 is arranged on the operating rod 62, a second extension block 64 contacting with the lower end of the traction shaft 61 is arranged on the traction shaft 51, one end of the traction shaft 61 is linked with the first extension block 63, the other end of the traction shaft is linked with the second extension block 64, the operating rod 62 is parallel to the traction shaft 51 and the traction shaft 61 is vertically arranged between the two, and a positioning block 71 for assisting the vertical movement of the traction shaft 61 is sleeved outside the traction shaft 61.
The specific improvement is that, as shown in fig. 4, after the magnetic force between the movable iron core 52 and the static iron core 3 is enhanced, the movable iron core 52 rotates to be attracted to the static iron core 3, the movable iron core 52 rotates to drive the traction rod 51 to rotate, the second extension block 64 on the traction rod 51 impacts the traction shaft 61, so that the second extension block 64 pushes the traction shaft 61 to move upwards, the upper position of the traction shaft 61 impacts the first extension block 63, so as to drive the operation rod 62 to rotate, the operation rod 62 drives the extension rod 8 to rotate, so as to drive the tripper to trip (the structure of the tripper is known as the prior art and is not additionally written in the prior art), the trip is tripper can be tripper driven by the action of the operation mechanism 11 with relatively less space and materials through the linkage relation of the traction rod 51, the traction shaft 61 and the operation rod 62, and the trip of the traction shaft 61 can be limited to move transversely only keep the vertical movement through the arrangement of the positioning block 71.
On the basis of the embodiment, the transformer shell 7 is further included, the transformer shell 7 is disposed inside the base 1, the positioning block 71 is disposed on the transformer shell 7 or the base 1, a through slot 72 through which the traction shaft 61 passes is formed in the positioning block 71, an abutting plate 731 is disposed on the traction rod 51, the abutting plate 731 can abut against the base 1, the traction rod 51 has a first position where the movable iron core 52 is in a short circuit state and a second position where the movable iron core 52 is in a normal state, and when the traction rod 51 is in the second position, the abutting plate 731 abuts against the base 1.
The specific improvement is as follows:
Example 1:
As shown in fig. 2, the positioning block 71 is disposed on the transformer housing 7, the positioning block 71 is provided with a through slot 72, the traction shaft 61 passes through the through slot 72 to limit the transverse movement of the traction shaft 61, so that the traction shaft 61 can only move vertically up and down, the traction rod 51 has a first position with the movable iron core 52 in a short circuit state and a second position with the movable iron core 52 in a normal state, when the traction shaft 61 is switched from the short circuit state to the normal state, the lower end face of the limiting pin 73 can abut against the upper end face of the positioning block 71, so that the traction shaft 61 is prevented from continuing to drop down, the limiting pin 73 can be always inserted into the through slot 72, and in order to prevent the traction shaft 61 from moving out of the through slot 72 when moving upwards, an anti-drop block is disposed at the bottom of the traction shaft 61, so that the traction shaft 61 is prevented from moving out of the through slot 72 when the upward movement amplitude of the traction shaft 61 is too large.
Example 2:
As shown in fig. 3 and 4, the supporting plate 731 is disposed on the traction rod 51, the base 1 is provided with a portion that is in contact with the traction rod 51, so that the base is used for determining an initial position of the movable iron core 52 when the traction rod 51 is in the second position in a normal state, when the traction rod 51 is switched from the second position to the first position, the traction rod 51 rotates anticlockwise, so that the supporting plate 731 is driven to rotate anticlockwise, at the moment, the traction shaft 61 is pushed upwards to drive the operation rod 62 to rotate, and the operation rod 62 drives the extension rod 8 to rotate, so that the release is driven to release;
The transformer mentioned in this embodiment may be a model number 32AHE 63A manufactured by Dioscorea soft magnetic alloy Co.Ltd.
On the basis of the embodiment, the static iron core 3 is arranged in an inverted U shape, a limiting groove 74 for the installation and entering of the static iron core 3 is further formed in the base 1 or the transformer shell 7, a fastening nail 75 is arranged on the transformer shell 7, and an anti-falling gasket 750 for preventing the static iron core 3 from falling off is arranged at the joint of the fastening nail 75 and the transformer shell 7.
The specific improvement is as follows:
In the embodiment 1, as shown in fig. 2, the static iron core 3 is in an inverted U-shaped arrangement, so that the static iron core 3 can be fixed on the transformer shell 7, fastening nails 75 (may be screw posts) are arranged at the openings of the limiting grooves 74, and are used for limiting the static iron core 3 to move forwards and backwards, and the static iron core 3 can be effectively limited to move, and through the arrangement of the limiting grooves 74 and the fastening nails 75, the static iron core 3 and the transformer shell 7 are simply assembled.
Embodiment 2 As shown in FIG. 5, the transformer housing 7 has a circular groove, an insert nut is disposed in the circular groove, a tooth screw is inserted into the insert nut and is matched with the insert nut, an anti-drop spacer 750 is clamped between the insert nut and the tooth screw, the lower end of the anti-drop spacer 750 is connected with the static iron core 3, the position of the static iron core 3 can be fixed through the arrangement of the anti-drop spacer 750, and in order to avoid that a soft connection wire on the conducting strip 4 can be contacted with the tooth screw, an isolation sheet 98 for wrapping the tooth screw is disposed outside the tooth screw.
On the basis of the embodiment, the bottom wall of the limiting groove 74 is provided with a slot 77, the static iron core 3 is provided with an inserting block 76 inserted into the slot 77, and a partition plate 30 for separating the two static iron cores 3 is arranged between the adjacent static iron cores 3.
The specific improvement is that as shown in fig. 5 and 8, through the arrangement of the insertion block 76 inserted into the insertion slot 77, the static iron core 3 can be effectively limited to move in the left-right direction, so that the static iron core 3 is better fixed, a separation plate 30 for separating the two static iron cores is arranged between the adjacent static iron cores 3, the separation plate 30 extends out of the transformer shell 7, the base is provided with extension ribs wrapped on two sides of the separation plate 30, an opposite insertion structure is formed between the two extension ribs and the separation plate 30, the creepage distance between the two static iron cores 3 can be effectively increased, and the safety of products is improved.
On the basis of the above embodiment, a plurality of accommodating grooves 9 into which the movable iron cores 52 are inserted are provided in the traction rod 51, a clamping structure for clamping the movable iron cores 52 in the accommodating grooves 9 is provided between the movable iron cores 52 and the accommodating grooves 9, and the clamping structure comprises a clamping block 91 provided on one side wall of the movable iron cores 52 or the accommodating grooves 9 and a clamping groove 92 provided on the other side wall and adapted to the clamping block 91.
The specific improvement is that, as shown in fig. 10 and 11, the traction rod 51 is formed by injection molding plastic, the movable iron core 52 is clamped in the accommodating groove 9 of the traction rod 51, a guide inclined plane 93 is arranged at the clamping block 91 for facilitating the clamping of the movable iron core 52, when the clamping block 91 is inserted into the clamping groove 92, the guide inclined plane 93 on the clamping block 91 contacts with the inclined plane in the accommodating groove 9, and when a user pushes the movable iron core 52 towards the accommodating groove 9, the clamping block 91 overcomes the convex block in the accommodating groove 9 and enters the clamping groove 92.
On the basis of the embodiment, the traction rod 51 is hooked with a return spring 94, and one side of the return spring 94, which is away from the traction rod 51, is hooked on the base 1.
The specific improvement is that, as shown in fig. 7 and 12, one end of the return spring 94 is hooked on the traction rod 51, and the other end is hooked on the base 1, so as to provide an initial pulling force for the traction rod 51, when the conducting strip 4 passes through a short-circuit current, the magnetic force between the movable iron core 52 and the static iron core 3 is enhanced, so that the magnetic force overcomes the pulling force of the return spring 94, and the traction rod 51 rotates, after the magnetic force subsides, the traction rod 51 drives the traction rod 51 to rotate due to the pulling force of the return spring 94, so that the abutting plate 731 abuts against the base 1.
On the basis of the embodiment, the base is provided with a plurality of conductive sheets 4, the conductive sheets 4 comprise a conductive sheet body 41, a contact end 42 arranged at one end of the conductive sheet body 41 and a positioning end 43 arranged at the other end, the contact end 42 is inserted into the static iron core 3, and the positioning end 43 is connected with the base 1 by adopting a screw 44.
The specific improvement is that, as shown in fig. 5, 6 and 7, the avoiding groove 2 is arranged on the transformer shell 7, the avoiding groove 2 is used for a wire or other conductive structures to pass through, the current change of the conductive structures is used for controlling the attraction of the movable iron core 52 and the static iron core 3, the conductive sheet 4 in the prior art is mostly made of annealed copper wires, the soft copper wires generate magnetic circuits, and the position of the soft connection cannot be uniquely determined, so that a magnetic field is unstable, therefore, the structure has the defect of high instantaneous action multiple or no action and unstable instantaneous action.
On the basis of the embodiment, the traction rod 51 is injection molded, and a bottom cover 95 for positioning the traction rod 51 is arranged at the bottom of the traction rod 51.
On the basis of the above embodiment, the inside of the traction rod 51 is provided with a reinforcing needle 53 for preventing the traction rod 51 from being deformed.
The concrete improvement is that, as shown in fig. 6-9, the setting of the reinforcing needle 53 in the traction rod 51 can effectively prevent the traction rod 51 from deforming, the clamping wheel 96 is arranged on the traction rod 51, the creepage distance can be increased, the groove avoiding the clamping wheel 96 is arranged on the bottom cover 95, the positioning groove for clamping the two sides of the traction rod 51 is arranged on the base 1, thereby positioning the traction rod 51, the positioning groove is used for limiting the left and right movement of the traction rod 51, the longitudinal position of the traction rod 51 is fixed through the setting of the positioning groove, a gap capable of enabling the clamping wheel 96 to rotate is reserved between the groove and the clamping wheel 96, and the upward and downward movement of the traction rod 51 can be limited through the setting of the bottom cover 95.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. A backup protection device of a circuit breaker is characterized by comprising:
A base (1);
the static iron cores (3) are arranged in the base (1) at intervals;
A transmission rod assembly (6) comprising a traction shaft (61);
An operating mechanism (11) including an operating lever (62);
The traction rod assembly (5) comprises a traction rod (51) and a movable iron core (52) which is arranged on the traction rod (51) and is correspondingly arranged with a plurality of static iron cores (3), one end of a traction shaft (61) is linked with the traction rod (51), the other end of the traction shaft is linked with an operating rod (62), the traction shaft (61) is slidably arranged along the height direction of the circuit breaker and can drive the operating rod (62) to rotate, a first extension block (63) which can be contacted with the upper end of the traction shaft (61) is arranged on the operating rod (62), a second extension block (64) which is contacted with the lower end of the traction shaft (61) is arranged on the traction rod (51), one end of the traction shaft (61) is linked with the first extension block (63), the other end of the traction shaft (61) is linked with the second extension block (64), and the operating rod (62) is arranged in parallel with the traction shaft (61) and is vertically arranged between the traction shaft (61).
2. A backup protection device for a circuit breaker according to claim 1, characterized in that the operating mechanism (11) further comprises an extension rod (8) located on the operating rod (62), and the exterior of the traction shaft (61) is sleeved with a positioning block (71) for assisting the vertical movement of the traction shaft (61).
3. The backup protection device of a circuit breaker according to claim 2, further comprising a transformer housing (7), wherein the transformer housing (7) is disposed inside the base (1), the positioning block (71) is disposed on the transformer housing (7) or the base (1), the positioning block (71) is provided with a through slot (72) through which the traction shaft (61) passes, the traction rod (51) is provided with an abutting plate (731), the abutting plate (731) can abut against the base (1), the traction rod (51) has a first position where the movable iron core (52) is in a short circuit state and a second position where the movable iron core (52) is in a normal state, and the abutting plate (731) abuts against the base (1) when the traction rod (51) is in the second position.
4. A backup protection device of a circuit breaker according to claim 3, wherein the static iron core (3) is arranged in an inverted U shape, a limit groove (74) for the installation and entering of the static iron core (3) is further formed in the base (1) or the transformer shell (7), a fastening nail (75) is arranged on the transformer shell (7), and an anti-falling gasket (750) for preventing the static iron core (3) from falling off is arranged at the joint of the fastening nail (75) and the transformer shell (7).
5. A backup protection device for a circuit breaker according to claim 4, wherein the bottom wall of the limit groove (74) is provided with a slot (77), the static iron cores (3) are provided with inserting blocks (76) inserted into the slot (77), and a partition plate (30) for separating the two static iron cores is arranged between the adjacent static iron cores (3).
6. The backup protection device for a circuit breaker according to claim 1, wherein a plurality of accommodating grooves (9) into which the movable iron cores (52) are inserted are formed in the traction rod (51), a clamping structure for clamping the movable iron cores (52) in the accommodating grooves (9) is arranged between the movable iron cores (52) and the accommodating grooves (9), and the clamping structure comprises a clamping block (91) arranged on one side wall of the movable iron cores (52) or the accommodating grooves (9) and a clamping groove (92) arranged on the other side wall and matched with the clamping block (91).
7. The backup protection device for a circuit breaker according to any one of claims 1 to 6, wherein a return spring (94) is hooked on the traction rod (51), and a side of the return spring (94) facing away from the traction rod (51) is hooked on the base (1).
8. The backup protection device for a circuit breaker according to any one of claims 1 to 6, wherein the base is provided with a plurality of conductive sheets (4), the conductive sheets (4) comprise a conductive sheet body (41), a contact end (42) arranged at one end of the conductive sheet body (41) and a positioning end (43) arranged at the other end, the contact end (42) is inserted into the static iron core (3), and the positioning end (43) is connected with the base (1) by a screw (44).
9. A backup protection device for a circuit breaker according to claim 7, wherein the drawbar (51) is injection molded, and a bottom cover (95) for positioning the drawbar (51) is provided at the bottom of the drawbar (51).
10. A backup protection device for a circuit breaker according to claim 9, characterized in that a reinforcing needle (53) for preventing deformation of the drawbar (51) is provided in the drawbar (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411275172.XA CN118782435B (en) | 2024-09-12 | 2024-09-12 | Backup protection device for circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411275172.XA CN118782435B (en) | 2024-09-12 | 2024-09-12 | Backup protection device for circuit breaker |
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| Publication Number | Publication Date |
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| CN118782435A CN118782435A (en) | 2024-10-15 |
| CN118782435B true CN118782435B (en) | 2025-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411275172.XA Active CN118782435B (en) | 2024-09-12 | 2024-09-12 | Backup protection device for circuit breaker |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452569A (en) * | 2017-09-21 | 2017-12-08 | 温州瑞睿电气有限公司 | A kind of clapper-type tripper structure of breaker |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9053888B2 (en) * | 2012-07-10 | 2015-06-09 | General Electric Company | Tie bar for molded case circuit breaker and method of assembly |
| CN104008934B (en) * | 2014-04-30 | 2016-06-29 | 浙江之路电气有限公司 | Breaker of plastic casing |
| CN104124114B (en) * | 2014-06-24 | 2016-08-24 | 上海诺雅克电气有限公司 | The short-circuit protection action current control method of multipolar electromagnetic electrical apparatus release and device |
| ES2790873T3 (en) * | 2015-04-28 | 2020-10-29 | Seari Electric Technology Co Ltd | Magnetothermic protection device, thermal protection component and magnetic protection component |
| CN205828263U (en) * | 2016-07-25 | 2016-12-21 | 苏州良信电器有限公司乐清分公司 | Oil-immersed breaker |
| CN212750779U (en) * | 2020-06-03 | 2021-03-19 | 良信电器(海盐)有限公司 | Backup protection electromagnet for circuit breaker |
| CN117558595A (en) * | 2023-12-28 | 2024-02-13 | 习力电气(浙江)有限公司 | Action-adjustable linkage mechanism for short-circuit protection of circuit breaker |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452569A (en) * | 2017-09-21 | 2017-12-08 | 温州瑞睿电气有限公司 | A kind of clapper-type tripper structure of breaker |
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| CN118782435A (en) | 2024-10-15 |
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