Isolating switch
By designing a compact isolation switch structure, combined with the dead-end design of the closing locking solenoid and locking member, the problems of the traditional solid-state circuit breaker are solved, and the problems of the uncompact structure, slow response speed and malfunction of the traditional solid-state circuit breaker are achieved, and fast and reliable galvanic isolation and safe operation are achieved.
Patent Information
- Application Number
- CN202422396726.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The isolation switch structure of traditional solid-state circuit breakers is not compact enough, the response speed is not sensitive enough, and it is prone to malfunctioning, which poses safety risks, and the prior art is difficult to prevent malfunctioning when quickly isolating currents.
An isolation switch including a housing, operating mechanism, closing locking mechanism, opening solenoid and isolation contacts is designed. The locking solenoid is fully fitted in the suction position through the closing locking solenoid, combined with the over-dead point design of the locking member and the handle, ensure that the galvanic isolation module is disconnected at the exact moment and preventing malfunction.
It realizes galvanic isolation with compact structure, fast response and high reliability, reduces the risk of malfunction, ensures operational safety and accuracy of galvanic isolation, and reduces switching power consumption.
Smart Images
Figure CN223284896U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of circuit breakers, and in particular relates to an isolating switch. Background Art
[0002] A circuit breaker is a switching device that is responsible for closing and disconnecting the current under normal circuit conditions, and can close and carry the current under abnormal circuit conditions within a specified time. It is a core link in maintaining the safety of the power grid.
[0003] Traditional circuit breakers have been widely used for many years and have the ability to isolate faults. However, due to their slow response when a fault occurs, it usually takes several milliseconds to respond and isolate the fault, which increases the risk of circuit wires catching fire and damaging electrical equipment. This can cause contacts to melt and re-weld together, and even cause the circuit breaker to explode in some cases.
[0004] To shorten operating time, circuit breakers have increasingly adopted thyristor devices as the breaking element in recent years. Because these circuit breakers lack mechanical moving parts, they are also known as solid-state circuit breakers. Compared to traditional circuit breakers, which typically take several milliseconds to trip, solid-state circuit breakers can interrupt the flow of current in microseconds, offering a rapid response time that reduces the risk of fire and damage to electrical equipment.
[0005] Solid-state circuit breakers feature an isolating switch, designed to isolate the circuit breaker from the power source, creating a clear disconnect point to ensure insulation isolation. Traditional solid-state circuit breakers are bulky, have poorly designed internal structures, and are slow to respond. Furthermore, the isolating switch is prone to malfunction, impacting reliability and posing safety risks during operation, necessitating further improvements.
[0006] In view of the above-mentioned prior art, the applicant has made a useful design, and the technical solution to be introduced below is produced in this context. Utility Model Content
[0007] The purpose of the utility model is to provide an isolating switch for solid-state circuit breakers which has a reasonable and compact structure, can prevent misoperation and has high reliability.
[0008] The purpose of the utility model is achieved in this way. A disconnector comprises a housing, an operating mechanism, a closing locking mechanism, an opening electromagnet that can cooperate with the operating mechanism to realize the tripping operation of the operating mechanism, and an isolating contact; the operating mechanism has an operable handle, and the handle is arranged on the upper part of the housing; the closing locking mechanism comprises a closing locking electromagnet and a locking member driven by the closing locking electromagnet to lock the handle; the opening electromagnet and the closing locking electromagnet are arranged in sequence from top to bottom in the housing.
[0009] In a specific embodiment of the present invention, a position signal board for transmitting signals to a solid-state electronic switch electrically connected to the disconnector is further provided between the handle and the tripping electromagnet, and the position signal board is driven by the handle.
[0010] In another specific embodiment of the present invention, it further includes first and second wiring terminals, and the isolating contact includes moving and static contacts, which are respectively connected to the first and second wiring terminals. The moving contact is pivotally connected in the housing and has a first closing position in contact with the static contact and a second opening position separated from the static contact. The static contact is a U-shaped part, semi-enclosing the closing locking electromagnet, and forming the isolating contact laterally with the moving contact in the housing.
[0011] In another specific embodiment of the present invention, the first and second wiring terminals include positive input and output wiring terminals and negative input and output wiring terminals; the moving and static contacts include negative moving and static contacts and positive moving and static contacts; the operating mechanism includes a first contact seat, a second contact seat, a connecting rod, a main spring, a trip button and a trip button reset spring, the first contact seat is pivotally connected to the housing, the negative moving contact is pivotally connected to the first contact seat, the positive moving contact is pivotally connected to the second contact seat, and the first contact seat and the second contact seat are connected. The head seat is pivoted so that the negative moving contact and the positive moving contact move synchronously; one end of the main spring abuts against the shell, and the other end abuts against the first contact seat, thereby driving the first and second contact seats to move synchronously; the jump buckle is pivoted to the first and second contact seats, and pivots coaxially with the first contact seat, one end of the jump buckle reset spring abuts against the jump buckle, and the other end abuts against the first contact seat, so that the jump buckle abuts against the first contact seat, thereby forming a driving groove, and one end of the connecting rod is hinged to the handle, and the other end is inserted into the driving groove.
[0012] In another specific embodiment of the present invention, the shell is composed of a left cover and a right cover, and a middle cover is further arranged between the left cover and the right cover. The shell forms a contact chamber for accommodating the isolating contact on the front side of the shell cavity, and forms a trip electromagnet installation chamber for accommodating the trip electromagnet at the top on the rear side of the shell cavity, and forms a locking electromagnet installation chamber for accommodating the closing locking electromagnet at the bottom; the middle cover is engaged with the left cover to separate the contact chamber into two independent moving contact cavities, which respectively accommodate the negative moving contact and the positive moving contact.
[0013] In another specific embodiment of the present invention, the left side cover is provided with a left side cover first rotating boss for pivoting the handle, the left side cover second rotating boss for pivoting the first contact seat and the left side cover third rotating boss for pivoting the locking member, and the left side cover third rotating boss is located between the left side cover first rotating boss and the left side cover second rotating boss; the right side cover is provided with the right side cover first, second and third rotating bosses corresponding to the left side cover first, second and third rotating bosses, the left and right side cover first rotating bosses cooperate to form the handle rotation center of the connecting handle, the left and right side cover second rotating bosses cooperate to form the contact seat rotation center pivoting the first contact seat, and the left and right side cover third rotating bosses cooperate to form the locking member rotation center of the pivotal locking member; the left side cover is also provided with a signal board mounting groove for mounting a position signal board.
[0014] In another specific embodiment of the present invention, the handle is provided with a pivot hole and a slew hole, the pivot hole is pivotally connected to the slew center of the handle, and the slew hole is hinged to the connecting rod, and a locking member limiting boss for cooperating with the locking member is provided on one side of the outer circumferential surface of the pivot hole, and a driving boss for cooperating with the position signal plate is provided on the other side. The position signal plate is driven by the driving boss, and when the handle is in the closed position, the status signal plate is triggered, so that the closing locking electromagnet drives the locking member to lock the handle. When the handle is open and the handle and the connecting rod are in the dead point position, the handle releases the trigger on the position signal plate, and the locking member releases the lock on the handle.
[0015] In a more specific embodiment of the present invention, one end of the locking member extends toward the closing locking electromagnet to form a locking drive end, and the other end extends toward the handle to form a locking end that cooperates with the locking member limiting boss, and a mounting boss perpendicular to the locking drive end is provided at this end, and a locking member mounting hole pivotally connected to the rotation center of the locking member is provided on the mounting boss, and a guide groove that cooperates with the locking member guide column on the middle cover is provided on the locking drive end, and an elastic reset member is sleeved on the locking member guide column, one end of the elastic reset member abuts against the locking member, and the other end abuts against the shell, and the locking member is also provided with an avoidance groove that facilitates the contact between the opening electromagnet and the trip buckle, and the opening electromagnet includes a opening electromagnet moving iron core, and the opening electromagnet moving iron core can cooperate with the trip buckle after passing through the avoidance groove to realize the tripping operation of the operating mechanism.
[0016] In another specific embodiment of the present invention, the tripping electromagnet also includes a tripping electromagnet static iron core, a tripping electromagnet top rod, a tripping electromagnet yoke, a moving iron core reset spring and a tripping electromagnet coil. The tripping electromagnet top rod is made of non-magnetic material and is connected to the tripping electromagnet moving iron core. The tripping electromagnet top rod passes through the tripping electromagnet static iron core to form a tripping drive end. The moving iron core reset spring is sleeved on the tripping electromagnet top rod and rests between the tripping electromagnet moving iron core and the tripping electromagnet static iron core. The tripping electromagnet yoke is a U-shaped part and is fixed to the tripping electromagnet coil. The tripping electromagnet moving iron core and the tripping electromagnet static iron core form an air gap under the action of the moving iron core reset spring. After the tripping electromagnet coil is energized, the tripping electromagnet moving iron core is attracted, driving the tripping electromagnet top rod to move and realize the tripping operation of the operating mechanism.
[0017] In yet another specific embodiment of the present invention, the closing locking electromagnet includes a closing electromagnet moving iron core, a closing electromagnet static iron core, a closing electromagnet push rod, a closing electromagnet static magnetic yoke and a closing electromagnet coil. The closing electromagnet push rod is made of non-magnetic material and is connected to the closing electromagnet moving iron core. The closing electromagnet static magnetic yoke is a U-shaped part and is fixed to the closing electromagnet coil. After the closing electromagnet coil is energized, the closing electromagnet moving iron core is attracted, driving the closing electromagnet push rod to drive the locking part to lock the handle.
[0018] Due to the adoption of the above structure, the present invention has the following beneficial effects compared with the prior art: the handle is locked by the closing locking structure, and the dynamic and static iron cores of the closing locking electromagnet are completely attracted (no air gap) when the closing locking electromagnet is in the attracted position, so that the closing locking electromagnet is kept in the attracted state under a smaller current, thereby reducing the power consumption of the switch; the locking member is arranged between the handle and the trip buckle, and is staggered with the trip buckle, so that the entire structure is simple and compact; the force point of the locking member adopts an over-dead point design, which can ensure the reliability of the locking; by accurately capturing the handle position state feedback signal, it can be ensured that the solid-state electronic switch is disconnected before the dynamic and static contacts of the current isolation module, thereby ensuring that the current isolation module will not disconnect the current and ensuring operational safety; by setting the position state feedback signal trigger point after the operating mechanism passes the dead point, it can ensure the accuracy of the opening signal and prevent malfunction. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is an overall cross-sectional view of the utility model;
[0020] Figure 2 This is an exploded view of the overall structure of the utility model;
[0021] Figure 3 This is a schematic structural diagram of the static contact of the present utility model;
[0022] Figure 4 This is a structural diagram of the left side cover of the present invention;
[0023] Figure 5 This is a schematic diagram of the middle cover according to the present invention from one perspective;
[0024] Figure 6 This is a schematic diagram of the middle cover of the present invention from another perspective;
[0025] Figure 7 This is a schematic diagram of the outer side of the right side cover of the present invention;
[0026] Figure 8 This is a schematic diagram of the inner side of the right side cover of the present invention;
[0027] Figure 9 This is a schematic diagram of the assembly of the operating mechanism of the present utility model;
[0028] Figure 10 This is a cross-sectional view of the handle of the present invention;
[0029] Figure 11 This is a three-dimensional diagram of the handle of the present invention;
[0030] Figure 12 This is a structural diagram of the position signal board described in the utility model;
[0031] Figure 13 This is a schematic structural diagram of the locking member of the present invention;
[0032] Figure 14 This is a schematic diagram of the structure of the opening electromagnet and the closing locking electromagnet described in the present utility model;
[0033] Figure 15 is a schematic diagram of the present invention in the unlocked position;
[0034] Figure 16 is a schematic diagram of the utility model in the locked position;
[0035] Figure 17 It is a schematic diagram of the overall structure of the utility model.
[0036] In the figure: 1. Housing, 11. Left side cover, 111. First rotary boss of left side cover, 112. Second rotary boss of left side cover, 113. Third rotary boss of left side cover, 114. Signal board mounting slot, 115. Magnet mounting limit boss of left side cover, 12. Middle cover, 121. Locking member guide column, 122. Partition, 123. Electromagnet clearance cavity, 124. Threading hole, 125. Positioning hole, 126. Screw hole, 1 3. Right side cover, 131. First rotary boss on the right side cover, 132. Second rotary boss on the right side cover, 133. Third rotary boss on the right side cover, 134. First terminal hole, 135. Second terminal hole, 136. Electromagnet mounting limit boss, 137. First wiring hole, 138. Second wiring hole, 14. Contact chamber, 15. Opening electromagnet mounting cavity, 16. Locking electromagnet mounting cavity, 17. Handle return Rotation center, 18. Contact seat rotation center, 19. Locking member rotation center; 2. Operating mechanism, 20. Drive slot, 21. Handle, 211. Pivot hole, 212. Rotation hole, 213. Locking member limiting boss, 214. Drive boss, 215. Handle spring mounting cavity, 216. Handle spring limiting boss, 217. Handle spring, 22. First contact seat, 23. Second contact seat, 24. Connecting rod, 25 Main spring, 26. Trip latch, 261. Rotating shaft, 27. Trip latch return spring, 28. First contact spring, 29. Second contact spring; 3. Closing lock mechanism, 31. Locking element, 311. Locking drive end, 3111. Guide groove, 312. Locking end, 313. Mounting boss, 3131. Locking element mounting hole, 314. Avoidance groove, 32. Elastic return element, 33. Closing lock electromagnet, 331. 332. Closing lock electromagnet moving core, 333. Closing lock electromagnet fixed core, 334. Closing lock electromagnet yoke, 335. Closing lock electromagnet coil, 336. Closing lock electromagnet signal line; 4. Opening electromagnet, 41. Opening electromagnet moving core, 42. Opening electromagnet fixed core, 43. Opening electromagnet push rod, 44. Opening electromagnet yoke, 45. Moving core return spring, 46. Opening electromagnet coil, 47. Opening electromagnet signal line; 5. Position signal board, 51. Position signal switch, 52. Position signal line, 53. Position signal SMD component board; 6. First terminal, 61. Positive incoming terminal, 62. Negative incoming terminal; 7. Second terminal, 71. Positive outgoing terminal, 72. Negative outgoing terminal; 81. Negative moving contact, 82 negative static contact, 83. Positive moving contact, 84. Positive static contact; 91. First terminal, 92. Second terminal. DETAILED DESCRIPTION
[0037] The specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments does not limit the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as within the scope of protection of the present invention.
[0038] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are with respect to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solutions provided by the present invention.
[0039] like Figure 1 、 Figure 2 As shown, the utility model relates to an isolating switch, comprising a housing 1, an operating mechanism 2, a closing locking mechanism 3, an opening electromagnet 4 that can cooperate with the operating mechanism 2 to realize a tripping operation of the operating mechanism 2, and a position signal plate 5.
[0040] See Figure 17 Combined with Figure 1 、 Figure 2 The housing 1 is composed of a left cover 11 and a right cover 13, with a middle cover 12 disposed between the left cover 11 and the right cover 13. The utility model also includes first and second wiring terminals 6 and 7. The isolating contacts include moving and static contacts, which are connected to the first and second wiring terminals 6 and 7, respectively. The moving contact is pivotally connected to the housing 1 and has a first closing position in contact with the static contact and a second opening position separated from the static contact. Figure 3 The static contact is a U-shaped piece, semi-enclosing the closing locking electromagnet 33 and forming the isolation contact laterally with the moving contact in the housing 1. Specifically, the first and second wiring terminals 6 and 7 include positive input and output wiring terminals 61 and 71 and negative input and output wiring terminals 62 and 72 (of course, the first wiring terminal 6 can also be the output wiring terminal and the second wiring terminal 7 can be the input wiring terminal. In this example, the first wiring terminal 6 is the input terminal and the second wiring terminal 7 is the output terminal); the moving and static contacts include negative moving and static contacts 81 and 82 and positive moving and static contacts 83 and 84. The negative moving contact 81 is electrically connected to the negative output wiring terminal 72 through a soft connector; the positive moving contact 83 is provided with a first wiring terminal 91, and the positive output wiring terminal 71 is provided with a second wiring terminal 92. The first wiring terminal 91 and the second wiring terminal 92 are respectively led through the first wiring terminal through-hole 134 and the second wiring terminal through-hole 135 located on the right side cover 13 to the outside of the shell 1 and electrically connected to the solid-state electronic switch.
[0041] See Figures 4 to 8The shell 1 is formed with a contact chamber 14 for accommodating the isolating contact on the front side of the shell cavity, and a tripping electromagnet installation chamber 15 for accommodating the tripping electromagnet is formed on the upper side of the rear side of the shell cavity, and a locking electromagnet installation chamber 16 for accommodating the closing locking electromagnet is formed on the lower side. The shell 1 is also provided with input and output wiring ports for installing input and output wiring terminals. The middle cover 12 is interlocked and connected with the left cover 11, dividing the contact chamber 14 into two independent moving contact chambers, respectively accommodating the negative moving contact 81 and the positive moving contact 83. That is, isolating contacts are respectively provided on both sides of the middle cover 12, one group is the isolating contacts on the positive pole, and the other group is the isolating contacts on the negative pole. The middle cover 12 isolates them through a partition 122 to prevent interference and short-circuit risks. The middle cover 12 is provided with an electromagnet clearance chamber 123 for installing the tripping electromagnet 4 and the closing locking electromagnet 33. The middle cover 12 is also provided with a threading hole 124. The bottom of the middle cover 12 is provided with a positioning hole 125 and a screw hole 126 for fixing. Figure 17 The right side cover 13 is also provided with a first wiring through hole 137 for the opening electromagnet signal line 47 and the position signal line 52 to pass through, and a second wiring through hole 138 for the closing and locking electromagnet signal line 336 to pass through.
[0042] Specifically, the left side cover 11 is provided with a first left side cover rotating boss 111 for pivotally connecting to the handle 21, a second left side cover rotating boss 112 for pivotally contacting the head seat, and a third left side cover rotating boss 113 for pivotally connecting to the locking member. The third left side cover rotating boss 113 is located between the first left side cover rotating boss 111 and the second left side cover rotating boss 112. The right side cover 13 is provided with first, second, and third right side cover rotating bosses 131, 132, and 133 corresponding to the first, second, and third left side cover rotating bosses 111, 112, and 113. The first pivoting bosses 111 and 131 of the left and right side covers cooperate to form the handle pivoting center 17 of the connecting handle 21; the second pivoting bosses 112 and 132 of the left and right side covers cooperate to form the contact seat pivoting center 18 of the pivoting contact seat; and the third pivoting bosses 113 and 133 of the left and right side covers cooperate to form the locking member pivoting center 19 of the pivoting locking member 31. The left side cover 11 is also provided with a signal board mounting slot 114 for mounting the position signal board 5. A left side cover magnet mounting limit boss 115 is provided on the inner wall of the left side cover 11, and a corresponding electromagnet mounting limit boss 136 is provided on the inner wall of the right side cover 13 to limit and secure the opening electromagnet 4 and the closing locking electromagnet 33.
[0043] See Figure 9The operating mechanism 2 includes a handle 21, a first contact seat 22, a second contact seat 23, a connecting rod 24, a main spring 25, a trip latch 26, a trip latch return spring 27, a first contact spring 28, and a second contact spring 29. The first contact seat 22 is pivotally connected to the contact seat rotation center 18 of the housing 1. The negative movable contact 81 is pivotally connected to the first contact seat 22. One end of the first contact spring 28 rests on the negative movable contact 81, and the other end rests on the first contact seat 22, so that the negative movable contact 81 abuts against the first contact seat 22. The positive movable contact 83 is pivotally connected to the second contact seat 23. One end of the second contact spring 29 rests on the positive movable contact 83, and the other end rests on the second contact seat 23, so that the positive movable contact 83 abuts against the second contact seat 23. The first contact seat 22 is pivotally connected to the second contact seat 23, so that the negative moving contact 81 and the positive moving contact 83 move synchronously, realizing synchronous closing and opening of the positive and negative poles. One end of the main spring 25 rests on the housing 1, and the other end rests on the first contact seat 22, thereby driving the first and second contact seats 22, 23 to move synchronously. The trip latch 26 is pivotally connected to the first and second contact seats 22, 23 through the rotating shaft 261, and pivots coaxially with the first contact seat 22. One end of the trip latch reset spring 27 rests on the trip latch 26, and the other end rests on the first contact seat 22, so that the trip latch 26 rests on the first contact seat 22, thereby forming a drive slot 20. One end of the connecting rod 24 is hinged to the handle 21, and the other end is inserted into the drive slot 20.
[0044] See Figure 10 and Figure 11 The handle 21 is provided with a pivot hole 211 and a rotation hole 212. The pivot hole 211 is pivotally connected to the handle rotation center 17, and the rotation hole 212 is hingedly connected to the connecting rod 24. A locking member limiting boss 213 is provided on one side of the outer circumference of the pivot hole 211 for engaging with the locking member 31, while a driving boss 214 is provided on the other side for engaging with the position signal plate 5. The position signal plate 5 is driven by the driving boss 214. The handle 21 also has a handle spring installation cavity 215 and a handle spring limiting boss 216. A handle spring 217 can be installed in the handle spring installation cavity 215 and is fixed in place by the handle spring limiting boss 216, thereby achieving opening reset. When the handle 21 is in the closed position, the status signal plate 5 is triggered, so that the closing locking electromagnet 33 drives the locking member 31 to lock the handle 21. When the handle 21 is opened and the handle 21 and the connecting rod 24 are in the dead point position, the handle 21 releases the trigger on the position signal plate 5, and the locking member 31 releases the lock on the handle 21.
[0045] For details, see Figure 12The position signal board 5 includes a position signal switch 51, a position signal line 52, and a position signal patch assembly board 53. The position signal line 52 is used to transmit signals to the solid-state switch. The position signal board 5 is directly driven by the handle 21, and the signal switch trigger point is set after the operating mechanism passes the dead center, thereby ensuring the accuracy of the trip signal. When the switch is manually closed, the drive boss 214 on the handle 21 pushes the position state feedback signal (position signal switch 51), outputting the closing signal. During the manual opening process, when the handle 21 reaches the dead center position (i.e., when the handle rotation center 17, the connecting rod 24, and the drive slot 20 are aligned), the drive boss 214 releases the drive to the position signal board 5. At this point, the moving contact, under the action of the main spring 25, performs the opening action. After a predetermined time, for example, 4 ms, the moving and static contacts begin to open. During this process, the controller controls the solid-state electronic switch through the position signal board 5 to quickly disconnect, ensuring that the isolating contacts do not interrupt the current. Since the trigger of the position signal plate 5 is set at the over-dead point position, it can prevent the user from making erroneous operations or erroneous operations caused by vibration and the like.
[0046] See you next time Figure 1 The closing lock mechanism 3 includes a locking member 31, an elastic return member 32, and a closing lock electromagnet 33. The opening electromagnet 4 and the closing lock electromagnet 33 are arranged sequentially from top to bottom above the static contact within the housing 1. The locking member 31 is located on the side of the opening electromagnet 4 and the closing lock electromagnet 33 close to the isolating contact and is pivotally connected to the locking member's rotation center 19.
[0047] See Figure 13 One end of the locking member 31 extends toward the closing locking electromagnet 33 to form a locking drive end 311, and the other end extends toward the handle 21 to form a locking end 312 that cooperates with the locking member limiting boss 213. A mounting boss 313 perpendicular to the locking drive end 311 is provided on this end. The mounting boss 313 is provided with a locking member mounting hole 3131 pivotally connected to the locking member rotation center 19. The locking drive end 311 is provided with a guide groove 3111 that cooperates with the locking member guide post 121 on the middle cover 12 to prevent the locking member 31 from deviating laterally during operation. The locking member guide post 121 is sleeved with an elastic return member 32. The elastic return member 32 is a spring, with one end abutting the locking member 31 and the other end abutting the middle cover 12 of the housing 1. The locking member 31 is also provided with an avoidance groove 314 to facilitate the contact between the tripping electromagnet 4 and the tripping buckle 26. The tripping electromagnet 4 includes a tripping electromagnet moving iron core 41. After passing through the avoidance groove 314, the tripping electromagnet moving iron core 41 can cooperate with the tripping buckle 26 to realize the tripping operation of the operating mechanism 2.
[0048] See Figure 14 The tripping electromagnet 4 also includes a tripping electromagnet static iron core 42, a tripping electromagnet top rod 43, a tripping electromagnet yoke 44, a movable iron core return spring 45, and a tripping electromagnet coil 46. The tripping electromagnet top rod 43 is made of non-magnetic material and is connected to the tripping electromagnet movable iron core 41. The tripping electromagnet top rod 43 passes through the tripping electromagnet static iron core 42 to form the tripping driving end. The movable iron core return spring 45 is mounted on the tripping electromagnet top rod 43 and abuts between the tripping electromagnet movable iron core 41 and the tripping electromagnet static iron core 42. The opening electromagnet yoke 44 is a U-shaped part and is fixed to the opening electromagnet coil 46. The opening electromagnet moving iron core 41 and the opening electromagnet static iron core 42 form an air gap under the action of the moving iron core reset spring 45. After the opening electromagnet coil 46 is energized, the opening electromagnet moving iron core 41 is attracted, driving the opening electromagnet top rod 43 to realize the tripping operation of the operating mechanism 2.
[0049] The closing lock electromagnet 33 includes a moving core 331, a static core 332, a push rod 333, a static yoke 334, and a coil 335. The push rod 333 is made of non-magnetic material and is connected to the moving core 331. The static yoke 334 is a U-shaped member fixed to the coil 335. When the coil 335 is energized, the moving core 331 is attracted, driving the push rod 333 to activate the locking member 31 and lock the handle 21. The closing lock electromagnet 33 is constructed so that when in the attracted position, the moving and static cores are completely in contact, ensuring that it can remain in the attracted state under low currents and reducing switch power consumption.
[0050] See Figure 15 and Figure 16 The specific action process of this utility model is as follows:
[0051] When the present invention is operating normally, the locking member 31, under the action of the elastic reset member 32, has its locking drive end 311 abut against the closing lock electromagnet 33, and its locking end 312 is disengaged from the handle 21. At this time, the switch can be manually closed and opened normally. When reverse current occurs when the switch is in the closed state or the electronic switch protection fails, the controller controls the closing lock electromagnet 33 of the current isolation device to be energized, and the electromagnet's moving iron core moves to the left, thereby pushing the locking member 31 to rotate clockwise through the locking drive end 311 of the locking member 31. The locking end 312 of the locking member 31 cooperates with the locking member limiting boss 213 on the handle 21 to lock the handle 21, making it impossible for the handle 21 to perform the opening operation. Since the direction of the force exerted by the handle 21 on the locking member 31 is clockwise, the handle 21 can be reliably locked. At this time, the closing locking electromagnet 33 is kept in the energized state until the fault is eliminated. At this time, the closing locking electromagnet 33 loses power, and the locking member 31 is reset to the initial position under the action of the elastic reset member 32, thereby releasing the lock on the handle 21.
Claims
1. An isolating switch, characterized in that: The invention comprises a housing (1), an operating mechanism (2), a closing locking mechanism (3), an opening electromagnet (4) capable of cooperating with the operating mechanism (2) to realize a tripping operation of the operating mechanism (2), and an isolating contact; the operating mechanism (2) has an operable handle (21), the handle (21) being arranged on the upper part of the housing (1); the closing locking mechanism (3) comprises a closing locking electromagnet (33) and a locking member (31) driven by the closing locking electromagnet (33) for locking the handle (21); the opening electromagnet (4) and the closing locking electromagnet (33) are arranged in sequence from top to bottom in the housing (1).
2. The isolating switch according to claim 1, characterized in that: A position signal board (5) for transmitting a signal to a solid-state electronic switch electrically connected to the isolating switch is also provided between the handle (21) and the opening electromagnet (4), and the position signal board (5) is driven by the handle (21).
3. The isolating switch according to claim 1, characterized in that: It also includes first and second wiring terminals (6, 7), the isolation contact includes a moving contact and a static contact, the moving contact and the static contact are respectively connected to the first and second wiring terminals (6, 7), the moving contact is pivoted in the housing (1) and has a first closing position in contact with the static contact and a second opening position separated from the static contact, the static contact is a U-shaped part, semi-encloses the closing locking electromagnet (33), and forms the isolation contact with the moving contact transversely in the housing (1).
4. The isolating switch according to claim 3, characterized in that: The first and second wiring terminals (6, 7) include positive input and output wiring terminals (61, 71) and negative input and output wiring terminals (62, 72); the moving contact includes a negative moving contact (81) and a positive moving contact (83), and the static contact includes a negative static contact (82) and a positive static contact (84); the operating mechanism (2) includes a first contact seat (22), a second contact seat (23), a connecting rod (24), a main spring (25), a trip latch (26) and a trip latch reset spring (27); the first contact seat (22) is pivotally connected to the housing (1), the negative moving contact (81) is pivotally connected to the first contact seat (22), the positive moving contact (83) is pivotally connected to the second contact seat (23), and the first contact seat (22) and the second contact seat (23) are pivotally connected. The two contact seats (23) are pivotally connected, so that the negative moving contact (81) and the positive moving contact (83) move synchronously; one end of the main spring (25) abuts against the housing (1), and the other end abuts against the first contact seat (22), thereby driving the first and second contact seats (22, 23) to move synchronously; the jump button (26) is pivotally connected to the first and second contact seats (22, 23), and pivots coaxially with the first contact seat (22); one end of the jump button reset spring (27) abuts against the jump button (26), and the other end abuts against the first contact seat (22), so that the jump button (26) abuts against the first contact seat (22), thereby forming a driving groove (20); one end of the connecting rod (24) is hinged to the handle (21), and the other end is inserted into the driving groove (20).
5. The isolating switch according to claim 4, characterized in that: The shell (1) is composed of a left cover (11) and a right cover (13) spliced together, and a middle cover (12) is also provided between the left cover (11) and the right cover (13). The shell (1) forms a contact chamber (14) for accommodating an isolating contact on the front side of the shell cavity, and forms a tripping electromagnet mounting chamber (15) for accommodating a tripping electromagnet (4) on the upper side of the rear side of the shell cavity, and forms a locking electromagnet mounting chamber (16) for accommodating a closing locking electromagnet (33) on the lower side; the middle cover (12) is engaged with the left cover (11) to separate the contact chamber (14) into two independent moving contact chambers, respectively accommodating a negative moving contact (81) and a positive moving contact (83).
6. The isolating switch according to claim 5, characterized in that: The left side cover (11) is provided with a first left side cover rotating boss (111) for pivoting the handle (21), a second left side cover rotating boss (112) for pivoting the first contact seat (22) and a third left side cover rotating boss (113) for pivoting the locking member (31), and the third left side cover rotating boss (113) is located between the first left side cover rotating boss (111) and the second left side cover rotating boss (112); the right side cover (13) is provided with first, second and third right side cover rotating bosses (111, 112 and 113) corresponding to the first, second and third left side cover rotating bosses (111, 112 and 113). The three rotating bosses (131, 132, 133) and the first rotating bosses (111, 131) of the left and right side covers cooperate to form a handle rotating center (17) of the connecting handle (21), the second rotating bosses (112, 132) of the left and right side covers cooperate to form a contact seat rotating center (18) pivotally connected to the first contact seat (22), and the third rotating bosses (113, 133) of the left and right side covers cooperate to form a locking member rotating center (19) pivotally connected to the locking member (31); the left side cover (11) is also provided with a signal board mounting groove (114) for mounting a position signal board (5).
7. The isolating switch according to claim 6, characterized in that: The handle (21) is provided with a pivot hole (211) and a rotation hole (212), wherein the pivot hole (211) is pivotally connected to the handle rotation center (17), and the rotation hole (212) is hinged to the connecting rod (24). A locking member limiting boss (213) for cooperating with the locking member (31) is provided on one side of the outer circumference of the pivot hole (211), and a driving boss for cooperating with the position signal plate (5) is provided on the other side. (214), the position signal plate (5) is driven by the driving boss (214), and when the handle (21) is in the closing position, the state signal plate (5) is triggered, so that the closing locking electromagnet (33) drives the locking member (31) to lock the handle (21); when the handle (21) is opened and the handle (21) and the connecting rod (24) are in the dead point position, the handle (21) releases the triggering of the position signal plate (5), and the locking member (31) releases the lock on the handle (21).
8. The isolating switch according to claim 7, characterized in that: One end of the locking member (31) extends toward the closing locking electromagnet (33) to form a locking drive end (311), and the other end extends toward the handle (21) to form a locking end (312) that cooperates with the locking member limiting boss (213), and a mounting boss (313) perpendicular to the locking drive end (311) is provided at the end, and a locking member mounting hole (3131) pivotally connected to the locking member rotation center (19) is provided on the mounting boss (313), and a locking member guide column (1231) pivotally connected to the locking member rotation center (19) on the middle cover (12) is provided on the locking drive end (311). 1) a matching guide groove (3111); an elastic reset member (32) is sleeved on the locking member guide column (121); one end of the elastic reset member (32) abuts against the locking member (31), and the other end abuts against the housing (1); the locking member (31) is also provided with an avoidance groove (314) for facilitating the contact between the tripping electromagnet (4) and the tripping buckle (26); the tripping electromagnet (4) includes a tripping electromagnet moving iron core (41); after passing through the avoidance groove (314), the tripping electromagnet moving iron core (41) can cooperate with the tripping buckle (26) to realize the tripping operation of the operating mechanism (2).
9. The isolating switch according to claim 8, characterized in that: The opening electromagnet (4) further comprises an opening electromagnet static iron core (42), an opening electromagnet top rod (43), an opening electromagnet yoke (44), a moving iron core reset spring (45) and an opening electromagnet coil (46). The opening electromagnet top rod (43) is made of non-magnetic conductive material and is connected to the opening electromagnet moving iron core (41). The opening electromagnet top rod (43) passes through the opening electromagnet static iron core (42) to form an opening driving end. The moving iron core reset spring (45) is sleeved on the opening electromagnet top rod (43). ) and rests between the tripping electromagnet moving iron core (41) and the tripping electromagnet static iron core (42), the tripping electromagnet yoke (44) is a U-shaped part and is fixed to the tripping electromagnet coil (46), the tripping electromagnet moving iron core (41) and the tripping electromagnet static iron core (42) form an air gap under the action of the moving iron core reset spring (45), and after the tripping electromagnet coil (46) is energized, the tripping electromagnet moving iron core (41) is attracted, driving the tripping electromagnet top rod (43) to move to realize the tripping operation of the operating mechanism (2).
10. The isolating switch according to claim 1, characterized in that: The closing locking electromagnet (33) comprises a closing electromagnet moving iron core (331), a closing electromagnet static iron core (332), a closing electromagnet push rod (333), a closing electromagnet static magnetic yoke (334) and a closing electromagnet coil (335). The closing electromagnet push rod (333) is made of non-magnetic conductive material and is connected to the closing electromagnet moving iron core (331). The closing electromagnet static magnetic yoke (334) is a U-shaped part and is fixed to the closing electromagnet coil (335). After the closing electromagnet coil (335) is energized, the closing electromagnet moving iron core (331) is attracted, driving the closing electromagnet push rod (333) to move, thereby driving the locking member (31) to lock the handle (21).