CN212010861U

CN212010861U - Switch unit and leakage protector and backup protector based on switch unit

Info

Publication number: CN212010861U
Application number: CN202020993252.XU
Authority: CN
Inventors: 宋新国; 宋汇
Original assignee: Guolong Electric Co ltd
Current assignee: Guolong Electric Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-11-24
Anticipated expiration: 2030-06-03

Abstract

A switch unit and a leakage protector and a backup protector based on the switch unit are provided. The method is characterized in that: the operating mechanism comprises a handle, a movable head assembly and a movable bridge assembly, the movable head assembly is in linkage connection with the handle through a first connecting rod, and the movable bridge assembly is in linkage connection with the movable head assembly through a second connecting rod; the casing adopts the modulization casing, moves first assembly and the setting of movable axle assembly and leans on the position on right side in casing inside, and the inside left side that corresponds to moving first assembly of casing is equipped with release installation position, and the left side that corresponds the movable axle assembly is equipped with mutual-inductor installation position, is formed with the circuit board mounting groove on the base of casing. Its advantage lies in, its casing adopts the modulization casing, and its operating device possesses the action function of circuit breaker, leaves a large amount of spaces in the casing inside simultaneously and is used for function extension and expansion, and this switch unit not only can directly regard as isolator to use, can change into earth-leakage protector or reserve protector in addition under the prerequisite that does not change infrastructure, is convenient for realize the modularization production and the concatenation combination, and production technology simple accurate.

Description

Switch unit and leakage protector and backup protector based on switch unit

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to switch unit and because earth leakage protector and reserve protector of this switch unit.

Background

In the field of low-voltage electrical appliances, isolating switches, residual current circuit breakers, backup protectors and the like are common switch equipment.

However, at present, the isolating switch, the residual current circuit breaker and the backup protector are not universal, and need to be designed independently when being designed and produced, so that the design cost and the production cost are higher.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of background art, the utility model provides a switch unit reaches earth leakage protector and reserve protector based on this switch unit.

The utility model discloses the technical scheme who adopts: a switch unit comprises a shell, an operating mechanism and a wiring mechanism, wherein the operating mechanism and the wiring mechanism are arranged in the shell; the operating mechanism comprises a handle, a movable head assembly and a movable bridge assembly, the movable head assembly is in rotating fit with the shell and is in linkage connection with the handle through a first connecting rod, and the movable bridge assembly is in vertical sliding fit with the shell and is in linkage connection with the movable head assembly through a second connecting rod; the wiring mechanism comprises a left wiring board and a right wiring board which are arranged on the left side and the right side of the movable bridge assembly; the casing adopts the modulization casing, including base, upper cover, move first assembly, movable axle assembly and set up the position that leans on the right side in casing inside, the inside left side that corresponds to moving first assembly of casing is equipped with release installation position, and the left side that corresponds the movable axle assembly is equipped with mutual-inductor installation position, be formed with the circuit board mounting groove on the base.

The lateral wall of the shell is also provided with two splicing wiring holes.

And a blocking piece is arranged at the splicing wiring hole.

The movable head assembly comprises a clamping plate, a jump buckle, a lock catch spring, a contact connecting rod and a movable spring, an external control connecting structure is formed on the lock catch, and a movable groove is correspondingly formed in the side wall of the shell.

The movable bridge assembly comprises a movable contact bridge, a sliding plate and a pressure spring, and a plurality of horizontal grooves are formed in the side faces of the left side and the right side of the sliding plate.

A leakage protector comprises the switch unit, a release, a mutual inductor and a leakage circuit board, wherein the release is correspondingly arranged at a release mounting position and corresponds to a movable head assembly; the mutual inductor is correspondingly arranged at the mutual inductor installation position and sleeved outside the left wiring board; the leakage circuit board is correspondingly installed in the circuit board installation groove.

Still be equipped with the concatenation wiring hole on the lateral wall of casing, concatenation wiring hole department is equipped with the connector, connector one end is formed with the first connecting portion of being connected with the mutual-inductor, and the other end is formed with the second connecting portion of being connected with the circuit breaker.

A backup protector comprises the switch unit, a release, an electromagnetic switch and a backup protection circuit board, wherein the release is correspondingly arranged at a release mounting position and corresponds to a moving head assembly; the backup protection circuit board is correspondingly arranged in the circuit board mounting groove, and the electromagnetic switch comprises a magnetic ring, a secondary coil, an armature moving piece, a static armature, an elastic moving contact piece, an armature pull rod, a first contact and a second contact which are arranged on the backup protection circuit board; the magnetic ring is sleeved outside the left wiring board, the secondary coil is sleeved on the magnetic ring, the armature moving piece is arranged in the inner ring of the magnetic ring and is positioned above the left wiring board, one end of the armature moving piece is connected with the left wiring board through an elastic piece, and the other end of the armature moving piece keeps a movable distance from the wiring board; the static armature is connected below the left wiring board and corresponds to the armature moving plate; one end of the elastic movable contact piece is connected with the backup protection circuit board, the other end of the elastic movable contact piece is connected with the armature movable piece through the armature pull rod, the first contact and the second contact are connected with the tripper, the elastic movable contact piece is provided with a first position which is in contact with the first contact to enable the tripper to be communicated with the power supply circuit and a second position which is separated from the first contact to enable the tripper to be disconnected with the power supply circuit, and the elastic movable contact piece and the first contact are in normally closed arrangement.

The utility model has the advantages that: the technical scheme is adopted, the shell of the circuit breaker is an analog-digital shell, the operating mechanism of the circuit breaker has the action function of the circuit breaker, a large amount of space is left in the shell for function extension and expansion, the switch unit can be directly used as an isolating switch, and can be changed into a leakage protector or a backup protector on the premise of not changing a basic structure, so that modular production and splicing combination are convenient to realize, and the production process is simple and easy to implement.

Drawings

Fig. 1 is a schematic structural diagram of a switch unit according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the housing base according to the embodiment of the present invention.

Fig. 3 is a schematic structural view of a movable head assembly according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a movable bridge assembly according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram 1 of the earth leakage protector according to the embodiment of the present invention.

Fig. 6 is a schematic structural diagram 2 of the earth leakage protector according to the embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a connector according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram 1 of a backup protector according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram 2 of a backup protector (hidden release and operating mechanism) according to an embodiment of the present invention.

Fig. 10 is a schematic diagram of a circuit connection of the power supply circuit on the backup circuit board according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1, a switch unit includes a housing 1, and an operating mechanism 2 and a wiring mechanism 3 mounted in the housing 1.

As shown in fig. 2, the housing 1 is an analog housing, and may be specifically an 18mm wide analog housing, and the shape of the housing is the same as that of a conventional miniature circuit breaker, the housing 1 is generally formed by assembling a base and an upper cover, and an installation space for installing each mechanism is formed inside the housing 1.

As shown in fig. 1 to 4, the operating mechanism 2 specifically includes a handle 21, a movable head assembly 22, a first connecting rod 23, a movable axle assembly 24, and a second connecting rod 25, where the first connecting rod 23 and the second connecting rod 25 both adopt U-shaped connecting rods.

The moving head assembly 22 comprises a first shaft 221, a clamping plate 222, a jump buckle 223, a lock catch 224, a lock catch spring 225, a contact connecting rod 226 and a moving spring 227, the first shaft 221 is fixed in the housing 1, the clamping plate 222 is sleeved on the first shaft 221, and is capable of rotating along the first axis 221, the jump buckle 223 is rotatably mounted on the clamping plate 222, the latch 224 is disposed on the first shaft 221 and can rotate along the first shaft 221, the latch spring 225 is a torsion spring, which is sleeved on the first shaft 221, and the two twisting legs of which are respectively pressed against the clamping plate 222 and the lock catch 224, and can drive the lock catch 224 to be locked with the jump buckle 223, the contact link 226 is rotatably mounted on the clamping plate 222, a first arc-shaped groove adapted to the first shaft 221 is formed at one end of the contact link 226, the movable spring 227 is a tension spring, the two ends of the contact connecting rod are respectively connected with the shell 1 and the contact connecting rod 226, and the contact connecting rod 226 and the clamping plate 222 can be driven to rapidly reset and rotate to realize brake opening.

An external control connecting structure is formed on the lock catch 224, a movable groove 15 is correspondingly formed on the side wall of the shell 1, the external control connecting structure is specifically a linkage shaft 2241 arranged on two sides of the lock catch 224, a linkage hole 2242 is arranged in the center of the linkage shaft 2241, and the movable groove 15 is an arc-shaped groove arranged on the shell 1; the latch 224 can be assembled with the circuit breaker to achieve synchronous or staggered switching on and off.

The movable bridge assembly 24 comprises a sliding plate 242, a movable contact bridge 241 and a pressure spring 243; the sliding plate 242 is in up-and-down sliding fit with the shell 1, a sliding groove 2241 is formed in the upper half portion of the sliding plate 242, a groove is formed in the middle of each of two side edges of the moving contact bridge 241, so that the middle of the moving contact bridge 241 is matched with the sliding groove, the moving contact bridge 241 is in up-and-down sliding fit with the sliding groove, and moving contacts are arranged at the left end and the right end of the moving contact bridge 241; the pressure spring 243 is disposed between the movable contact bridge 241 and the sliding plate 242, and drives the movable contact bridge 241 to move downward.

The side surfaces of the left side and the right side of the lower half part of the sliding plate 242 are provided with the horizontal grooves 2422, so that the arc breaking isolation effect is better during breaking, the creepage distance is further increased, and the safety and the reliability are higher.

The wiring mechanism 3 comprises a left wiring board 31, a right wiring board 32, a left wiring terminal 33 and a right wiring terminal 34, the left wiring terminal 33 and the right wiring terminal 34 are respectively installed on the left side and the right side of the shell 1 and used for externally connecting wires, the left wiring board 31 and the right wiring board 32 are fixedly connected in the shell 1 in a clamped mode, the left wiring board 31 and the right wiring board 32 are respectively arranged on the left side and the right side of the sliding plate 242 and provided with static contacts corresponding to the movable contacts and are respectively connected with the left wiring terminal 33 and the right wiring terminal 34, the left wiring board 31 is arranged in a straight mode, the hard plate flow guiding and near straight line flow guiding technology is adopted, the interference of eddy currents and homopolar magnetic fields can be avoided as much as possible, and when large currents are.

The handle 21 is rotatably mounted on the housing 1 and is linked with the trip latch 223 through the first connecting rod 23, the contact connecting rod 226 is linked with the sliding plate 242 through the second connecting rod 25, when the switch is closed, the rotating handle 21 drives the moving head assembly 22 to rotate, the moving head assembly 22 rotates to drive the moving bridge assembly 24 to slide downwards, the moving contact on the moving contact bridge 241 is in contact with the static contact on the left wiring board 31 and the right wiring board 32 to conduct the main circuit, the trip latch 223 is buckled with the latch 224, and the moving spring 227 provides an overpressure force to make the handle 21 stay at the switch-on position. When the lock catch 224 is forced to be separated from the trip catch 223 for unlocking, the movable spring 227 and the handle torsion spring provide a reset force to drive the handle 21 and the movable head assembly 22 to reset, the movable head assembly 22 rotates to drive the movable axle assembly 24 to slide upwards, so that the movable contact on the movable contact bridge 241 is separated from the static contact on the left wiring board 31 and the right wiring board 32 to break a main circuit, and an effect of automatic tripping and brake separating is achieved.

A straight bridge type double-breakpoint contact structure is formed between the operating mechanism 2 of the switch unit and the wiring structure, and compared with a conventional rotary contact structure, the straight bridge type double-breakpoint contact structure can further improve the opening distance and further improve the breaking capacity.

In addition, a large amount of space is reserved in the shell 1, the moving head assembly 22 and the moving axle assembly 24 are arranged at the position close to the right side in the shell 1, the moving head assembly 22 is positioned above the moving axle assembly 24, a release mounting position 11 is arranged on the left side of the moving head assembly 22 in the shell 1, a transformer mounting position 12 is arranged on the left side of the moving axle assembly 24, a circuit board mounting groove 13 is arranged on the base corresponding to the release mounting position 11, and the circuit board mounting groove 13 penetrates through the position between the moving head assembly 22 and the moving axle assembly 24 to the right side and extends to the right wiring terminal 34; two splicing wiring holes 14 are also formed in the side wall of the shell 1.

Wherein, concatenation wiring hole 14 department is equipped with the separation blade, and the thickness of separation blade is made thin, only reserves 0.5mm, and this makes concatenation wiring hole 14 can be in semi-enclosed state, when need not use this concatenation wiring hole 14, by the separation blade when not influencing the outward appearance at first, when needs use the separation blade, can easily perk again and wear.

By adopting the scheme, in the operating mechanism 2, the moving head assembly 22 is arranged between the handle 21 and the moving axle assembly 24, so that the operating mechanism not only can manually operate the opening and closing, but also has the function of automatically tripping and opening the brake. Meanwhile, a large amount of space is left in the shell 1 and can be used for function extension and expansion, the switch unit can be directly used as an isolating switch, and can be changed into a leakage protector or a backup protector on the premise of not changing a basic structure, so that modular production and splicing combination are convenient to realize, and the production process is simple and easy to implement.

As shown in fig. 5-7, a leakage protector based on the switch unit includes the isolating switch, a release 4, a transformer 5, and a leakage circuit board 6, where the release 4 is correspondingly installed at a release installation location 11 and corresponds to a moving head assembly 22; the mutual inductor 5 is correspondingly arranged at the mutual inductor installation position 12 and sleeved outside the left wiring board 41; the leakage circuit board 6 is correspondingly arranged in the circuit board mounting groove 13.

Because the bridge type double-breakpoint contact structure is adopted, the arc isolation effect is good, an arc extinguish chamber is not required to be additionally arranged, and therefore on the basis of the original switch unit, the tripper 4, the mutual inductor 5, the leakage circuit board 6 and the like can be directly refitted to form the leakage protector, the structure is simple, and the production is convenient.

The leakage protector can be spliced with a circuit breaker to form a 1P + N leakage circuit breaker, and is simple in structure.

In addition, the release 4 can be replaced by a release coil, the mutual inductor 5 can be replaced by a small-area thin film alloy, and the leakage circuit board can be replaced by an electronic amplifier, so that the electromagnetic leakage is converted into electronic leakage, and the electronic leakage is more economical and practical.

The connector 7 is arranged at the splicing wiring hole 14, a first connecting portion 71 connected with the mutual inductor 5 is formed at one end of the connector 7, and a second connecting portion 72 connected with the circuit breaker is formed at the other end of the connector 7. Wherein, first connecting portion are looks vertically wiring hole and screw hole, and the wire inserts the wiring hole and passes through the bolt fastening, second connecting portion are flat wiring board structure, can assemble on the left side or the right according to market demand circuit breaker through connector 7, and the commonality is stronger.

As shown in fig. 8-9, a backup protector includes the switch unit, a release 4, an electromagnetic switch 8, and a backup protection circuit board 9, where the release 4 is correspondingly installed at a release installation location 11 and corresponds to a moving head assembly 22; the backup protection circuit board 9 is correspondingly installed in the circuit board installation groove 13, and the electromagnetic switch 8 comprises a magnetic ring 81, a secondary coil 82, an armature moving piece 83, a static armature 69, an elastic moving piece 85, an armature pull rod 86, a first contact 87 and a second contact 88 which are installed on the backup protection circuit board 9; the magnetic ring 81 is sleeved outside the left wiring board 31, the secondary coil 82 is sleeved on the magnetic ring 81, the armature moving piece 83 is arranged at the inner ring of the magnetic ring 81 and is positioned above the left wiring board 31, one end of the armature moving piece 83 is connected with the left wiring board 31 through an elastic piece 84, and the other end of the armature moving piece is kept at a movable distance from the wiring board 31; the static armature 69 is connected below the left wiring board 31 and corresponds to the armature moving plate 83; one end of the elastic moving contact piece 85 is connected with the backup protection circuit board 9, the other end of the elastic moving contact piece is connected with the armature moving piece 83 through the armature pull rod 86, the first contact 87 and the second contact 88 are connected with the release 4 and are respectively arranged at the upper side and the lower side of the elastic moving contact piece 85, the elastic moving contact piece 85 is provided with a first position which is in contact with the first contact 87 to enable the release 4 to be communicated with a power supply circuit and a second position which is connected with the second contact 88 to enable the release 4 to be disconnected with the power supply circuit, and the position between the elastic moving contact piece 85 and the first contact 87 is in normally closed arrangement.

When the backup protector is used, the backup protector is connected with a surge protector (lightning arrester) in series, under the normal condition, the elastic movable contact piece 65 is in the first position and keeps contact with the first contact 67, and the backup protector works normally to keep a line conducted.

When a current larger than a set current value, particularly a lightning current, flows through the left wiring board 31, the attraction force between the static armature 89 and the armature moving piece 83 can drive the armature moving piece 83 to bend the elastic piece 84 to move downwards, the armature moving piece 83 drives the elastic moving contact piece 85 to bend downwards through the armature pull rod 86, so that the elastic moving contact piece 85 is in a second position to be in contact with the second contact 88, the release 4 can break a power supply circuit and cannot act, when a large current flows through the release device, the attraction force between the static armature and the armature moving piece is insufficient, and the elastic moving contact piece resets under the action of the elastic force of the elastic piece, so that the release can not occur in normal work.

In the action, the concentric impedance peak clipping inductor L2, the concentric impedance peak clipping inductor L3 and the first capacitor C1 can be further designed in the power supply circuit to move backwards by a waveform, 1.5 waveforms can be delayed in total, and then the applied electric energy on the electromagnetic release 3 in the charging process is delayed again through the absorption of the size of the second capacitor C2, so that the release 4 cannot act within 0.1-0.2 second; meanwhile, as the stored electric energy is utilized to delay the action of the release 4, the elastic movable contact piece 85 is contacted with the second contact 88 when in the second position, and the discharge is carried out through short circuit, thereby ensuring that the electromagnetic release 3 does not act when the elastic movable contact piece 85 is reset, and further ensuring the stable and reliable action.

When the current in the left wiring board is smaller than the set current value, the attraction force between the static armature 89 and the armature moving piece 83 is not enough to drive the elastic moving contact piece 85 to act, so the elastic moving contact piece 85 and the first contact 87 are in a normally closed arrangement, and once a surge protector (lightning arrester) has fault current or has phenomena of electric leakage, short circuit and the like, the release 4 can act to release.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. A switch unit comprises a shell (1), an operating mechanism (2) and a wiring mechanism (3), wherein the operating mechanism and the wiring mechanism are arranged in the shell (1); the method is characterized in that:

the operating mechanism (2) comprises a handle (21), a movable head assembly (22) and a movable bridge assembly (24), wherein the movable head assembly (22) is in rotating fit with the shell and is in linkage connection with the handle (21) through a first connecting rod (23), and the movable bridge assembly (24) is in vertical sliding fit with the shell and is in linkage connection with the movable head assembly (22) through a second connecting rod (25);

the wiring mechanism (3) comprises a left wiring board (31) and a right wiring board (32) which are arranged on the left side and the right side of the movable bridge assembly (24);

casing (1) adopts the modulization casing, including base, upper cover, move first assembly (22), transaxle assembly (24) and set up the position that leans on the right side in casing (1) inside, the inside left side that moves first assembly (22) that corresponds of casing is equipped with release installation position (11), and the left side that corresponds transaxle assembly (24) is equipped with mutual-inductor installation position (12), be formed with circuit board mounting groove (13) on the base.

2. A switching unit according to claim 1, characterized in that: the side wall of the shell (1) is also provided with two splicing wiring holes (14).

3. A switching unit according to claim 2, characterized in that: and a blocking piece is arranged at the splicing wiring hole (14).

4. A switching unit according to claim 1, characterized in that: the movable head assembly (22) comprises a clamping plate (222), a jump buckle (223), a lock catch (224), a lock catch spring (225), a contact connecting rod (226) and a movable spring (227), an external control connecting structure is formed on the lock catch (224), and a movable groove (15) is correspondingly formed in the side wall of the shell (1).

5. A switching unit according to claim 1, characterized in that: the movable bridge assembly (24) comprises a movable contact bridge (241), a sliding plate (242) and a pressure spring (243), and a plurality of horizontal grooves (2422) are formed in the side faces of the left side and the right side of the sliding plate (242).

6. A leakage protector is characterized in that: comprising a switch unit as claimed in any one of claims 1 to 5, and a release (4), a mutual inductor (5) and a leakage circuit board (6), wherein the release (4) is correspondingly arranged at a release mounting position (11) and corresponds to a moving head assembly (22); the mutual inductor (5) is correspondingly arranged on the mutual inductor installation position (12) and sleeved outside the left wiring board (41); the leakage circuit board (6) is correspondingly arranged in the circuit board mounting groove (13).

7. A earth-leakage protector according to claim 6, characterized in that: still be equipped with concatenation wiring hole (14) on the lateral wall of casing (1), concatenation wiring hole (14) department is equipped with connector (7), connector (7) one end is formed with first connecting portion (71) of being connected with mutual-inductor (5), and the other end is formed with second connecting portion (72) of being connected with the circuit breaker.

8. A backup protector, characterized by: comprising a switch unit according to any one of claims 1-5, a release (4), an electromagnetic switch (8) and a backup protection circuit board (9), wherein the release (4) is correspondingly arranged at a release mounting position (11) and corresponds to a moving head assembly (22); the backup protection circuit board (9) is correspondingly arranged in the circuit board mounting groove (13), and the electromagnetic switch (8) comprises a magnetic ring (81), a secondary coil (82), an armature moving piece (83), a static armature (69), an elastic moving piece (85), an armature pull rod (86), a first contact (87) and a second contact (88) which are arranged on the backup protection circuit board (9); the magnetic ring (81) is sleeved outside the left wiring board (31), the secondary coil (82) is sleeved on the magnetic ring (81), the armature moving piece (83) is arranged at the inner ring of the magnetic ring (81) and is positioned above the left wiring board (31), one end of the armature moving piece (83) is connected with the left wiring board (31) through an elastic piece (84), and the other end of the armature moving piece is kept at a movable distance from the wiring board (31); the static armature (69) is connected below the left wiring board (31) and corresponds to the armature moving plate (83); one end of the elastic movable contact piece (85) is connected with the backup protection circuit board (9), the other end of the elastic movable contact piece is connected with the armature movable piece (83) through an armature pull rod (86), the first contact (87) and the second contact (88) are connected with the tripper (4), the elastic movable contact piece (85) is provided with a first position which is in contact with the first contact (87) to enable the tripper (4) to be communicated with a power supply circuit and a second position which is separated from the first contact (87) to enable the tripper (4) to be disconnected with the power supply circuit, and the elastic movable contact piece (85) and the first contact (87) are in normally closed arrangement.