Isolation switch

Abstract

An isolating switch belongs to the technical field of solid-state circuit breakers. The disconnecting switch comprises a shell, a switching-on locking mechanism and an operating mechanism are arranged in the shell, the operating mechanism is provided with a handle, and the switching-on locking mechanism comprises an elastic reset piece, a switching-on locking electromagnet and a rotationally-arranged locking piece. One end of the locking piece extends towards the closing locking electromagnet to form a locking driving end, the other end of the locking piece extends towards the handle to form a locking end matched with a limiting part on the handle, and the locking piece is provided with a first locking position and a second unlocking position. The structure is reasonable and compact, the response speed is sensitive, misoperation can be prevented, and the operation reliability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of solid-state circuit breakers, and in particular relates to an isolating switch. Background Art

[0002] Circuit breakers are the most important control devices in power systems. They are used to cut off and connect load circuits. When circuit faults such as overload, short circuit and undervoltage occur, they can automatically disconnect the circuit to play a protective role, prevent the accident from expanding, and ensure safe operation.

[0003] Traditional circuit breakers have been widely used for many years, but they are slow to respond when a fault occurs, typically taking several milliseconds to respond and isolate the fault. This increases the risk of fires in circuit wiring and damage to electrical equipment. To shorten this time, circuit breakers have increasingly adopted thyristor devices as the breaking element. 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 operate in microseconds, accurately opening or closing the circuit at a specific voltage or current phase, meeting the stringent switching requirements of microgrids.

[0004] Solid-state circuit breakers feature an isolating switch, designed to isolate the circuit breaker from the power supply, creating a clear disconnect point to ensure insulation isolation. Traditional solid-state circuit breakers are bulky, with poorly designed internal structures. The isolating switch's closing lockout structure is illogical, slowing response and prone to false tripping, impacting reliability. This poses a safety hazard during operation, necessitating further improvements.

[0005] 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

[0006] The purpose of the utility model is to provide an isolating switch with a reasonable and compact structure, a sensitive response speed, and the ability to prevent misoperation and improve operational reliability.

[0007] The object of the present utility model is achieved in the following way. A disconnector, the disconnector includes a housing, a closing locking mechanism and an operating mechanism are arranged in the housing, the operating mechanism has a handle, the closing locking mechanism includes an elastic reset member, a closing locking electromagnet and a rotatably arranged locking member; one end of the locking member extends towards the closing locking electromagnet to form a locking drive end, and the other end extends towards the handle to form a locking end that cooperates with a limiting portion on the handle. The locking member has a first locking position and a second unlocking position. When the closing locking electromagnet loses power, the locking member is in the second unlocking position under the action of the elastic reset member, and at this time the locking end is disengaged from the limiting portion of the handle; when the closing locking electromagnet is powered on, the closing locking electromagnet drives the locking member to be in the first locking position through the locking drive end of the locking member, and at this time the locking end locks the handle by cooperating with the limiting portion.

[0008] In a specific embodiment of the present utility model, the limiting portion on the handle is a locking member limiting boss arranged on the circumferential surface of the rotation of the handle.

[0009] In another specific embodiment of the present utility model, an installation boss perpendicular to the locking drive end is arranged on the locking member near the locking end, and the installation boss is pivotally connected to the housing.

[0010] In yet another specific embodiment of the present utility model, the disconnector further includes a first terminal, a second terminal, an isolating contact, a tripping electromagnet and a position signal board driven by the handle. The isolating contact includes a moving contact and a static contact. The moving contact and the static contact are respectively connected to the first terminal and the second terminal. The moving contact is pivotally connected in the housing and has a first closing position in contact with the static contact and a second tripping position separated from the static contact. The tripping electromagnet and the closing locking electromagnet are arranged in the housing in sequence from top to bottom. The static contact is a U-shaped member that semi-surrounds the closing locking electromagnet and forms an isolating contact with the moving contact horizontally in the housing; the tripping electromagnet passes through the locking member and cooperates with the operating mechanism to realize the tripping operation of the operating mechanism.

[0011] In yet another specific embodiment of the present utility model, the first wiring terminal and the second wiring terminal include a positive power input terminal, a positive power output terminal, a negative power input terminal, and a negative power output terminal; the isolation contact includes a negative moving contact, a negative static contact, a positive moving contact, and a positive static contact. The operating mechanism includes a first contact seat, a second contact seat, a connecting rod, a main spring, a trip latch, and a trip latch return 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 is pivotally connected to the second contact seat so that the negative moving contact and the positive moving contact move synchronously. One end of the main spring abuts against the housing, and the other end abuts against the first contact seat, thereby driving the first contact seat and the second contact seat to move synchronously. The trip latch is pivotally connected to the first contact seat and the second contact seat and pivotally rotates coaxially with the first contact seat. One end of the trip latch return spring abuts against the trip latch, and the other end abuts against the first contact seat, so that the trip latch abuts against the first contact seat, thereby forming a driving groove. One end of the connecting rod is hinged to the handle, and the other end is inserted into the driving groove.

[0012] In still another specific embodiment of the present utility model, the housing is composed of a left cover and a right cover spliced together. A middle cover is further provided between the left cover and the right cover. The housing forms a contact chamber for accommodating the isolation contact at the front side of the housing cavity. At the rear side of the housing cavity, a shunt electromagnet installation cavity for accommodating the shunt electromagnet is formed above, and a locking electromagnet installation cavity for accommodating the closing locking electromagnet is formed below. The middle cover is fitted and connected with the left cover, dividing the contact chamber into two independent moving contact chambers for accommodating the negative moving contact and the positive moving contact respectively.

[0013] In a further specific embodiment of the present utility model, the left cover is provided with a first rotary boss on the left cover for pivotally connecting the handle, a second rotary boss on the left cover for pivotally connecting the first contact seat, and a third rotary boss on the left cover for pivotally connecting the locking member. The third rotary boss on the left cover is located between the first rotary boss on the left cover and the second rotary boss on the left cover. The right cover is provided with a first rotary boss on the right cover, a second rotary boss on the right cover, and a third rotary boss on the right cover corresponding to the first rotary boss on the left cover, the second rotary boss on the left cover, and the third rotary boss on the left cover. The first rotary boss on the left cover and the first rotary boss on the right cover cooperate to form a handle rotary center for connecting the handle. The second rotary boss on the left cover and the second rotary boss on the right cover cooperate to form a contact seat rotary center for pivotally connecting the first contact seat. The third rotary boss on the left cover and the third rotary boss on the right cover cooperate to form a locking member rotary center for pivotally connecting the locking member. The left cover is further provided with a signal plate installation groove for installing the position signal plate.

[0014] In a further specific embodiment of the present utility model, the handle is provided with a pivot hole and a rotary hole. The pivot hole is pivotally connected to the rotary center of the handle, and the rotary hole is hinged to the connecting rod. On one side of the outer circumferential surface of the pivot hole, a locking member limiting boss for cooperating with the locking member is provided, and on the other side, a driving boss for cooperating with the position signal plate is provided. The position signal plate is driven by the driving boss. When the handle is in the closing position, the state signal plate is triggered, so that the closing locking electromagnet drives the locking member to lock the handle. When the handle is tripped and the handle and the connecting rod are in the dead point position, the handle releases the triggering of the position signal plate, and the locking member releases the locking of the handle.

[0015] In yet another specific embodiment of the present utility model, a locking member guiding column is provided on the housing. The locking member is provided with a guiding groove on the locking driving end for cooperating with the locking member guiding column. The elastic resetting member is sleeved on the locking member guiding column, and one end abuts against the locking member, and the other end abuts against the housing. An avoidance groove for facilitating the contact between the tripping electromagnet and the trip latch is further provided on the locking member. The tripping electromagnet includes a moving iron core. After passing through the avoidance groove, the moving iron core cooperates with the trip latch to realize the tripping operation of the operating mechanism.

[0016] In yet another specific embodiment of the present utility model, the tripping electromagnet further includes a tripping electromagnet static iron core, a tripping electromagnet ejector rod, a tripping electromagnet yoke, a moving iron core return spring, and a tripping electromagnet coil. The tripping electromagnet ejector rod is made of non-magnetic material and is connected to the tripping electromagnet moving iron core. The tripping electromagnet ejector rod passes through the tripping electromagnet static iron core to form a tripping driving end. The moving iron core return spring is sleeved on the tripping electromagnet ejector rod and abuts between the tripping electromagnet moving iron core and the tripping electromagnet static iron core. The tripping electromagnet yoke is a U-shaped member and is fixed to the tripping electromagnet coil. An air gap is formed between the tripping electromagnet moving iron core and the tripping electromagnet static iron core under the action of the moving iron core return spring. After the tripping electromagnet coil is energized, the tripping electromagnet moving iron core is attracted, driving the ejector rod to move.

[0017] In yet another specific embodiment of the present utility model, the closing locking electromagnet includes a closing electromagnet moving iron core, a closing electromagnet static iron core, a closing electromagnet ejector rod, a closing electromagnet yoke, and a closing electromagnet coil. The closing electromagnet ejector rod is made of non-magnetic material and is connected to the closing electromagnet moving iron core. The closing electromagnet yoke is a U-shaped member 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 ejector rod to move, and driving the locking member 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 present mechanism is used to lock the handle for closing, and the dynamic and static iron cores are completely attracted (without air gap) when the closing locking electromagnet is in the attracted position, thereby achieving that the closing locking electromagnet is kept in the attracted state under a relatively small current, thereby reducing the power consumption of the switch; the force bearing point of the locking member adopts an over-dead point design, thereby ensuring 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 isolating switch, thereby ensuring that the isolating switch 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 13Schematic structural diagram of the locking member of the present utility model;

[0032] Figure 14 Schematic structural diagram of the opening electromagnet and closing locking electromagnet of the present utility model;

[0033] Figure 15 Schematic diagram of the present utility model in the unlocked position;

[0034] Figure 16 Schematic diagram of the present utility model in the locked position;

[0035] Figure 17 Schematic overall structural diagram of the present utility model.

[0036] In the figure: 1. housing, 11. left cover, 111. first rotary boss of the left cover, 112. second rotary boss of the left cover, 113. third rotary boss of the left cover, 114. signal board mounting groove, 115. magnet mounting limit boss of the left cover, 12. middle cover, 121. locking member guiding column, 122. partition board, 123. electromagnet relief cavity, 124. wire passing hole, 125. positioning hole, 126. screw hole, 13. right cover, 131. first rotary boss of the right cover, 132. second rotary boss of the right cover, 133. third rotary boss of the right cover, 134. first terminal passing hole, 135. second terminal passing hole, 136. electromagnet mounting limit boss, 137. first wire routing hole, 138. second wire routing hole, 14. contact chamber, 15. closing electromagnet mounting cavity, 16. locking electromagnet mounting cavity, 17. handle rotation center, 18. contact seat rotation center, 19. locking member rotation center; 2. operating mechanism, 20. drive groove, 21. handle, 211. pivot hole, 212. rotation hole, 213. locking member limit boss, 214. drive boss, 215. handle spring mounting cavity, 216. handle spring limit boss, 217. handle spring, 22. first contact seat, 23. second contact seat, 24. connecting rod, 25. main spring, 26. toggle, 261. return shaft, 27. toggle return spring, 28. first contact spring, 29. second contact spring; 3. closing locking mechanism, 31. locking member, 311. locking drive end, 3111. guide groove, 312. locking end, 313. mounting boss, 3131. locking member mounting hole, 314. relief groove, 32. elastic reset member, 33. closing locking electromagnet, 331. moving iron core of the closing electromagnet, 332. static iron core of the closing electromagnet, 333. ejector rod of the closing electromagnet, 334. magnetic yoke of the closing electromagnet, 335. coil of the closing electromagnet, 336. signal wire of the closing locking electromagnet; 4. opening electromagnet, 41. moving iron core of the opening electromagnet, 42. static iron core of the opening electromagnet, 43. ejector rod of the opening electromagnet, 44. magnetic yoke of the opening electromagnet, 45. moving iron core return spring, 46. coil of the opening electromagnet, 47. signal wire of the opening electromagnet; 5. position signal board, 51. position signal switch, 52. position signal wire, 53. position signal patch component board; 6. first terminal, 61. positive incoming line terminal, 62. negative incoming line terminal; 7. second terminal, 71. positive outgoing line terminal, 72. negative outgoing line terminal; 81. negative moving contact, 82. negative static contact, 83. positive moving contact, 84. positive static contact; 91. first terminal head, 92. second terminal head. Detailed implementation manners

[0037] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any change in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0038] In the following description, any concepts related to the directionality (or orientation) such as up, down, left, right, front, and back are in the context of the position state of the figure being described. The purpose is to facilitate public understanding, and thus it cannot be construed as a special limitation on the technical solution provided by the present invention.

[0039] As Figure 1 、 Figure 2 shown, the present invention relates to a disconnecting switch, which includes a housing 1, an operating mechanism 2, a closing locking mechanism 3, a tripping electromagnet 4 that can cooperate with the operating mechanism 2 to realize the tripping operation of the operating mechanism 2, and a position signal board 5.

[0040] See Figure 17 and in combination with Figure 1 、 Figure 2 , the housing 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 present invention also includes first and second terminal blocks 6, 7. The isolation contacts include moving and static contacts, and the moving and static contacts are respectively connected to the first and second terminal blocks 6, 7. The moving contact is pivotally connected 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. See Figure 3 , the static contact is a U-shaped part that semi-surrounds the closing locking electromagnet 33 and forms the isolation contact with the moving contact horizontally in the housing 1. Specifically, the first and second terminal blocks 6, 7 include a positive input, positive output terminal blocks 61, 71 and a negative input, negative output terminal blocks 62, 72. (Of course, it is also possible that the first terminal block 6 is the output terminal block and the second terminal block 7 is the input terminal block. In this example, the first terminal block 6 is taken as the input terminal and the second terminal block 7 is taken as the output terminal as an example); the moving and static contacts include a negative moving, negative static contacts 81, 82 and a positive moving, positive static contacts 83, 84. The negative moving contact 81 is electrically connected to the negative output terminal block 72 through a flexible connection member; the positive moving contact 83 is provided with a first connection head 91, and the positive output terminal block 71 is provided with a second connection head 92. The first connection head 91 and the second connection head 92 respectively pass through the first connection head through hole 134 and the second connection head through hole 135 on the right cover 13 and are led out of the housing 1 to be electrically connected to the solid-state electronic switch.

[0041] See Figures 4 to 8, the housing 1 forms a contact chamber 14 for accommodating isolated contacts on the front side of the housing cavity. On the rear side of the housing cavity, an opening electromagnet mounting cavity 15 for accommodating an opening electromagnet is formed above, and a locking electromagnet mounting cavity 16 for accommodating a closing locking electromagnet is formed below. The housing 1 is also provided with inlet and outlet connection ports for mounting inlet and outlet connection terminals. The middle cover 12 is fitted and connected with the left cover 11, dividing the contact chamber 14 into two independent moving contact chambers, which respectively accommodate the negative moving contact 81 and the positive moving contact 83. That is, isolation contacts are respectively arranged on both sides of the middle cover 12, one group is the isolation contacts on the positive electrode, and the other group is the isolation contacts on the negative electrode. The middle cover 12 isolates them through a partition 122 to prevent interference and short - circuit risks. An electromagnet relief cavity 123 is provided on the middle cover 12 for mounting the opening electromagnet 4 and the closing locking electromagnet 33. A wire passing hole 124 is also provided on the middle cover 12. Positioning holes 125 and screw holes 126 for fixing are provided at the bottom of the middle cover 12. See Figure 17 , a first wire passing hole 137 through which the signal wire 47 of the opening electromagnet and the position signal wire 52 pass and a second wire passing hole 138 through which the signal wire 336 of the closing locking electromagnet pass are also provided on the right cover 13.

[0042] Specifically, a first rotary boss 111 on the left cover 11 for pivotally connecting the handle 21, a second rotary boss 112 on the left cover for pivotally connecting the contact head seat, and a third rotary boss 113 on the left cover for pivotally connecting the locking member are provided. The third rotary boss 113 on the left cover is located between the first rotary boss 111 and the second rotary boss 112 on the left cover. A first rotary boss 131 on the right cover, a second rotary boss 132 on the right cover, and a third rotary boss 133 on the right cover corresponding to the first rotary boss 111, the second rotary boss 112, and the third rotary boss 113 on the left cover are provided on the right cover 13. The first rotary boss 111 on the left cover and the first rotary boss 131 on the right cover cooperate to form a handle rotation center 17 for connecting the handle 21; the second rotary boss 112 on the left cover and the second rotary boss 132 on the right cover cooperate to form a contact head seat rotation center 18 for pivotally connecting the contact head seat; the third rotary boss 113 on the left cover and the third rotary boss 133 on the right cover cooperate to form a locking member rotation center 19 for pivotally connecting the locking member 31. A signal board mounting groove 114 for mounting the position signal board 5 is also provided on the left cover 11. A left - cover magnet mounting limit boss 115 is provided on the inner wall of the left cover 11, and a corresponding electromagnet mounting limit boss 136 is provided on the inner wall of the right cover 13 for limiting and fixing 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 abuts on the housing 1, and the other end abuts on the first contact seat 22, thereby driving the first contact seat 22 and the second contact seat 23 to move synchronously. The trip latch 26 is pivotally connected to the first contact seat 22 and the second contact seat 23 through the rotating shaft 261, and pivots coaxially with the first contact seat 22. One end of the trip latch reset spring 27 abuts on the trip latch 26, and the other end abuts on the first contact seat 22, so that the trip latch 26 abuts against 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] SeeFigure 14 The described opening electromagnet 4 further includes an opening electromagnet static iron core 42, an opening electromagnet ejector rod 43, an opening electromagnet yoke 44, a moving iron core return spring 45, and an opening electromagnet coil 46. The opening electromagnet ejector rod 43 is made of non-magnetic material and is connected to the opening electromagnet moving iron core 41. The opening electromagnet ejector rod 43 forms an opening drive end after passing through the opening electromagnet static iron core 42. The moving iron core return spring 45 is sleeved on the opening electromagnet ejector rod 43 and abuts between the opening electromagnet moving iron core 41 and the opening electromagnet static iron core 42. The opening electromagnet yoke 44 is a U-shaped member and is fixed to the opening electromagnet coil 46. An air gap is formed between the opening electromagnet moving iron core 41 and the opening electromagnet static iron core 42 under the action of the moving iron core return spring 45. After the opening electromagnet coil 46 is energized, the opening electromagnet moving iron core 41 is attracted, driving the opening electromagnet ejector rod 43 to act to realize the tripping operation of the operating mechanism 2.

[0049] The described closing locking electromagnet 33 includes a closing electromagnet moving iron core 331, a closing electromagnet static iron core 332, a closing electromagnet ejector rod 333, a closing electromagnet yoke 334, and a closing electromagnet coil 335. The closing electromagnet ejector rod 333 is made of non-magnetic material and is connected to the closing electromagnet moving iron core 331. The closing electromagnet yoke 334 is a U-shaped member 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 ejector rod 333 to act to drive the locking member 31 to lock the handle 21. The closing locking electromagnet 33 is configured such that when in the attracted position, the moving and static iron cores are completely in contact, thereby ensuring that it can remain in the attracted state under a relatively small current and reducing the power consumption of the switch.

[0050] See Figure 15 and Figure 16 The specific operation process of the present 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, the isolating switch comprising a housing (1), a closing locking mechanism (3) and an operating mechanism (2) are arranged in the housing (1), the operating mechanism (2) has a handle (21), and is characterized in that: The closing locking mechanism (3) described above includes an elastic reset member (32), a closing locking electromagnet (33), and a rotatably arranged locking member (31); one end of the locking member (31) extends towards the closing locking electromagnet (33) to form a locking drive end (311), and the other end extends towards the handle (21) to form a locking end (312) that cooperates with the limiting portion on the handle (21). The locking member (31) has a first locking position and a second unlocking position. When the closing locking electromagnet (33) loses power, the locking member (31) is in the second unlocking position under the action of the elastic reset member (32). At this time, the locking end (312) is disengaged from the limiting portion of the handle (21); when the closing locking electromagnet (33) is powered on, the closing locking electromagnet (33) drives the locking member (31) to be in the first locking position through the locking drive end (311) of the locking member (31). At this time, the locking end (312) locks the handle (21) by cooperating with the limiting portion.

2. The disconnecting switch according to claim 1, characterized in that: The limiting portion on the handle (21) described above is a locking member limiting boss (213) provided on the circumferential surface of the rotation of the handle (21).

3. The disconnecting switch according to claim 1, characterized in that: An installation boss (313) perpendicular to the locking drive end (311) is provided on the locking member (31) near the locking end (312). The installation boss (313) is pivotally connected to the housing (1).

4. The disconnector according to claim 1, wherein: The disconnecting switch further includes a first terminal (6), a second terminal (7), isolating contacts, a tripping electromagnet (4), and a position signal board (5) driven by the handle (21). The isolating contacts include a moving contact and a static contact. The moving contact and the static contact are respectively connected to the first terminal (6) and the second terminal (7). The moving contact is pivotally connected inside the housing (1) and has a first closing position in contact with the static contact and a second tripping position separated from the static contact. The tripping electromagnet (4) and the closing locking electromagnet (33) are arranged in sequence from top to bottom inside the housing (1). The static contact is a U-shaped member that semi-surrounds the closing locking electromagnet (33) and laterally forms isolating contacts with the moving contact inside the housing (1); the tripping electromagnet (4) passes through the locking member (31) and cooperates with the operating mechanism (2) to realize the tripping operation of the operating mechanism (2).

5. The disconnector according to claim 4, characterized in that: The first terminal (6) and the second terminal (7) include a positive input terminal (61), a positive output terminal (71), a negative input terminal (62), and a negative output terminal (72); the isolation contact includes a negative moving contact (81), a negative static contact (82), a positive moving contact (83), 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 return 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). 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. 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 contact seat (22) and the second contact seat (23) to move synchronously. The trip latch (26) is pivotally connected to the first contact seat (22) and the second contact seat (23) and pivotally rotates coaxially with the first contact seat (22). One end of the trip latch return spring (27) abuts against the trip latch (26), and the other end abuts against the first contact seat (22), so that the trip latch (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).

6. The disconnector according to claim 5, characterized in that: The housing (1) is formed by splicing a left cover (11) and a right cover (13). A middle cover (12) is further provided between the left cover (11) and the right cover (13). The housing (1) forms a contact chamber (14) for accommodating the isolation contact on the front side of the housing cavity. On the rear side of the housing cavity, a shunt electromagnet mounting cavity (15) for accommodating the shunt electromagnet (4) is formed above, and a locking electromagnet mounting cavity (16) for accommodating the closing locking electromagnet (33) is formed below. The middle cover (12) is fitted and connected to the left cover (11), separating the contact chamber (14) into two independent moving contact cavities for accommodating the negative moving contact (81) and the positive moving contact (83) respectively.

7. The disconnector according to claim 6, characterized in that: On the left side cover (11) described above, there are provided a first rotary boss (111) of the left side cover for pivotally connecting the handle (21), a second rotary boss (112) of the left side cover for pivotally connecting the first contact seat (22), and a third rotary boss (113) of the left side cover for pivotally connecting the locking member (31). The third rotary boss (113) of the left side cover is located between the first rotary boss (111) and the second rotary boss (112) of the left side cover. On the right side cover (13), there are provided a first rotary boss (131), a second rotary boss (132), and a third rotary boss (133) of the right side cover corresponding to the first rotary boss (111), the second rotary boss (112), and the third rotary boss (113) of the left side cover respectively. The first rotary boss (111) of the left side cover and the first rotary boss (131) of the right side cover cooperate to form a handle rotation center (17) for connecting the handle (21). The second rotary boss (112) of the left side cover and the second rotary boss (132) of the right side cover cooperate to form a contact seat rotation center (18) for pivotally connecting the first contact seat (22). The third rotary boss (113) of the left side cover and the third rotary boss (133) of the right side cover cooperate to form a locking member rotation center (19) for pivotally connecting the locking member (31). On the left side cover (11), there is also provided a signal plate mounting groove (114) for mounting the position signal plate (5).

8. The disconnector according to claim 7, characterized in that: The handle (21) is provided with a pivot hole (211) and a rotary hole (212). The pivot hole (211) is pivotally connected to the handle rotation center (17), and the rotary hole (212) is hinged to the connecting rod (24). On one side of the outer circumferential surface of the pivot hole (211), there is provided a locking member limiting boss (213) for cooperating with the locking member (31), and on the other side, there is provided a driving boss (214) for cooperating with the position signal plate (5). The position signal plate (5) is driven by the driving boss (214). When the handle (21) is in the closing position, it triggers the status signal plate (5), causing the closing locking electromagnet (33) to drive the locking member (31) to lock the handle (21). When the handle (21) is tripped and the handle (21) and the connecting rod (24) are in the dead point position, the handle (21) releases the trigger of the position signal plate (5), and the locking member (31) releases the lock on the handle (21).

9. The disconnector according to claim 6, wherein: A locking piece guide post (121) is provided on the described housing (1). A guide groove (3111) that cooperates with the locking piece guide post (121) is provided on the locking drive end (311) of the locking piece (31). The elastic reset piece (32) is sleeved on the locking piece guide post (121), with one end abutted against the locking piece (31) and the other end abutted against the housing (1). An avoidance groove (314) that facilitates the contact between the opening electromagnet (4) and the toggle (26) is also provided on the locking piece (31). The opening electromagnet (4) includes a moving iron core (41). The moving iron core (41) passes through the avoidance groove (314) and cooperates with the toggle (26) to act, enabling the tripping operation of the operating mechanism (2).

10. The disconnector according to claim 9, characterized in that: The opening electromagnet (4) further includes a static iron core of the opening electromagnet (42), an opening electromagnet ejector rod (43), an opening electromagnet yoke (44), a moving iron core return spring (45), and an opening electromagnet coil (46). The opening electromagnet ejector rod (43) is made of non-magnetic material and is connected to the moving iron core (41) of the opening electromagnet. The opening electromagnet ejector rod (43) forms an opening drive end after passing through the static iron core (42) of the opening electromagnet. The moving iron core return spring (45) is sleeved on the opening electromagnet ejector rod (43) and abuts between the moving iron core (41) and the static iron core (42) of the opening electromagnet. The opening electromagnet yoke (44) is a U-shaped part and is fixed to the opening electromagnet coil (46). The moving iron core (41) and the static iron core (42) of the opening electromagnet form an air gap under the action of the moving iron core return spring (45). After the opening electromagnet coil (46) is energized, the moving iron core (41) of the opening electromagnet is attracted, driving the ejector rod (43) to act.

11. The disconnecting switch according to claim 1, characterized in that: The closing locking electromagnet (33) includes a moving iron core (331) of the closing electromagnet, a static iron core (332) of the closing electromagnet, a closing electromagnet ejector rod (333), a closing electromagnet yoke (334), and a closing electromagnet coil (335). The closing electromagnet ejector rod (333) is made of non-magnetic material and is connected to the moving iron core (331) of the closing electromagnet. The closing electromagnet 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 moving iron core (331) of the closing electromagnet is attracted, driving the closing electromagnet ejector rod (333) to act and driving the locking piece (31) to lock the handle (21).

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