Current-limiting tripping device and fusion switch

Abstract

The utility model provides a current-limiting tripping device and a fusion switch, and relates to the low-voltage electrical field. The current-limiting tripping device comprises an operating mechanism, the operating mechanism comprises an energy storage module and a tripping module, and when a pre-charging loop switch body and a main loop switch body of the fusion switch are switched on through manual or electric operation, the energy storage module can store energy and is locked with the tripping module; the tripping module is connected with the main loop switch body, the main loop switch body comprises a magnetic induction coil, the magnetic induction coil is electrically connected with the tripping module through the circuit board, and the magnetic induction coil is used for sampling current of a main loop of the fusion switch and driving the tripping module and the energy storage module to release limitation through the circuit board when the current of the main loop is larger than a preset value. The energy storage module releases energy so that the main loop switch body is tripped and opened. According to the current-limiting tripping device, tripping and opening can be rapidly carried out when large current appears in a main loop, the fusion switch is protected in time, and the reliability and the safety are improved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical equipment, and in particular to a current limiting tripping device and a fusion switch. Background Art

[0002] A fusion switch is an electrical device used to quickly switch circuits. Its principle is to control the current within a safe range within a certain period of time to achieve the on-off function of the switching circuit. It is widely used in power distribution equipment in power systems.

[0003] The pre-charging circuit of the existing fusion switch can only be remotely opened or closed by electric operation. The remote operation speed is slow. When a large current appears in the main circuit, the fusion switch cannot be protected and disconnected in time. Utility Model Content

[0004] The utility model aims to provide a current limiting tripping device, which can quickly trip and open the gate when a large current appears in the main circuit, thereby protecting the fusion switch in time and improving reliability and safety.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In one aspect of the utility model, a current limiting tripping device is provided, comprising an operating mechanism, the operating mechanism comprising an energy storage module and a tripping module, when the pre-charging circuit switch body and the main circuit switch body of the fusion switch are closed by manual or electric operation, the energy storage module can store energy and lock with the tripping module; the tripping module is connected to the main circuit switch body, the main circuit switch body comprises a magnetic induction coil, the magnetic induction coil is electrically connected to the tripping module through a circuit board, the magnetic induction coil is used to sample the current of the main circuit of the fusion switch, and when the main circuit current is greater than a preset value, the tripping module and the energy storage module are driven to release the limitation through the circuit board, and the energy storage module releases energy to cause the main circuit switch body to trip and open.

[0007] Optionally, the circuit board is used to receive a remote tripping signal, and drive the tripping module and the energy storage module to release the restrictions through the remote tripping signal, and the energy storage module releases energy to trip and open the main circuit switch body.

[0008] Optionally, the operating mechanism also includes an electromagnetic module, the electromagnetic module includes a mechanism shaft, the energy storage module is transmission-connected to the mechanism shaft; the mechanism shaft and the main circuit switch body are linked; the mechanism shaft is driven to rotate to drive the main circuit switch body to trip and open.

[0009] Optionally, the tripping module includes a tripping coil and a tripping rod connected to the tripping coil. The tripping rod is arranged on one side of the energy storage module and can be locked with the energy storage module. The tripping coil is electrically connected to the magnetic induction coil on the main circuit switch body through a circuit board. When the main circuit current is greater than a preset value, the tripping coil drives the main circuit switch body to trip and open.

[0010] Optionally, the energy storage module includes an energy storage member and an energy storage spring sleeved on the mechanism rotating shaft. When the main circuit switch body closes, the mechanism rotating shaft can drive the energy storage member and the energy storage spring to store energy. The energy storage member can abut against the tripping rod to lock the energy storage module. When the energy storage member is unlocked from the tripping rod, the energy storage module releases energy to cause the main circuit switch body to trip and open.

[0011] Optionally, the energy storage member is convexly provided with a first abutting portion and a second abutting portion, and the tripping rod is provided with a locking portion. The first abutting portion can abut against or separate from the locking portion to lock or unlock the tripping during energy storage when the main circuit switch body closes. The second abutting portion is used to abut against or separate from the locking portion to lock or unlock the tripping during energy storage when the pre-charge circuit switch body closes.

[0012] Optionally, the electromagnetic module further includes a tripping coil, an intermediate coil, and a closing coil. The tripping coil, the intermediate coil, and the closing coil can drive the operating mechanism to be in the tripping off state, the intermediate mid state, and the closing on state respectively through electric operation.

[0013] When the operating mechanism switches from the closing state to the tripping off state, the mechanism rotating shaft releases energy to cancel the abutment between the first abutting portion and the locking portion, and the main circuit switch body trips and opens.

[0014] When the operating mechanism switches from the intermediate state to the tripping off state, the mechanism rotating shaft releases energy to cancel the abutment between the second abutting portion and the locking portion, and the pre-charge circuit switch body trips and opens.

[0015] Optionally, the main circuit switch body includes a plurality of stacked main switch units. The main switch unit is provided with a moving contact group and a first static contact and a second static contact respectively located on both sides of the moving contact group. The moving contact group can be inserted into the first static contact and the second static contact respectively, and the magnetic induction coil is sleeved on the contact plate of the first static contact.

[0016] Optionally, the operating mechanism further includes a handle. The handle is connected to the mechanism rotating shaft to manually control the rotation of the mechanism rotating shaft, thereby driving the energy storage module and the tripping module to lock or unlock.

[0017] Optionally, when the first abutting portion is locked with the locking portion, the main circuit switch body closes. When the main circuit current is greater than a preset value, the tripping coil and the intermediate coil work simultaneously to release the energy of the energy storage module and rotate it in the reverse direction, causing the main circuit switch body to trip and open.

[0018] Optionally, both the closing coil and the opening coil are linked with the mechanism rotating shaft and the linkage member. The closing coil and the opening coil drive the linkage member and the mechanism rotating shaft to act in sequence, so that the pre-charge circuit switch body acts first and the main circuit switch body acts later.

[0019] On the other hand, the present utility model provides a fusion switch, which includes a current-limiting tripping device, and a pre-charge circuit switch body and a main circuit switch body respectively connected to the current-limiting tripping device;

[0020] By manually or electrically controlling the operating mechanism of the current-limiting tripping device, when closing, the pre-charge circuit switch body is driven to close first, and the main circuit switch body closes later. After the main circuit switch body closes, it drives the pre-charge circuit switch body to open; when opening, it drives the main circuit switch body to open.

[0021] The beneficial effects of the present utility model include:

[0022] The present application provides a current-limiting tripping device, which includes an operating mechanism. The operating mechanism includes an energy storage module and a tripping module. When the pre-charge circuit switch body and the main circuit switch body of the fusion switch are closed through manual or electric operation, the energy storage module can store energy and lock with the tripping module; the tripping module is connected to the main circuit switch body. The main circuit switch body includes a magnetic induction coil, and the magnetic induction coil is electrically connected to the tripping module through a circuit board. The magnetic induction coil is used to sample the current of the main circuit of the fusion switch, and when the main circuit current is greater than a preset value, it drives the tripping module to release the limitation with the energy storage module through the circuit board, and the energy storage module releases energy to make the main circuit switch body trip and open. The above-designed current-limiting tripping device can quickly trip and open when a large current appears in the main circuit, provide timely protection for the fusion switch, and improve reliability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 One of the structural schematic diagrams of the current-limiting tripping device provided by the embodiment of the present utility model;

[0025] Figure 2 Another structural schematic diagram of the current-limiting tripping device provided by the embodiment of the present utility model;

[0026] Figure 3 Another structural schematic diagram of the current-limiting tripping device provided by the embodiment of the present utility model;

[0027] Figure 4 Structural schematic diagram of the fusion switch provided by an embodiment of the present utility model;

[0028] Figure 5 Structural schematic diagram of the main switch unit provided by an embodiment of the present utility model;

[0029] Figure 6 It is the fourth structural schematic diagram of the current-limiting tripping device provided by an embodiment of the present utility model.

[0030] Icons: 1 - fusion switch; 10 - current-limiting tripping device; 101 - handle; 11 - opening coil; 12 - intermediate coil; 13A - energy storage module; 13 - energy storage member; 130 - energy storage spring; 131 - first abutting portion; 132 - second abutting portion; 14 - mechanism rotating shaft; 15 - closing coil; 16 - circuit board; 17A - tripping module; 170 - tripping rod; 170a - locking portion; 171 - tripping coil; 18 - linkage member; 20 - pre-charge circuit switch body; 30 - main circuit switch body; 30a - main switch unit; 31 - moving contact group; 31a - moving contact piece; 321 - first static contact; 322 - second static contact; 33 - magnetic induction coil. Specific embodiments

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0033] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0035] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] Please refer to Figure 1 and Figure 4 , this embodiment provides a current-limiting tripping device 10, which includes an operating mechanism. The operating mechanism includes an energy storage module 13A and a tripping module 17A. When the pre-charge circuit switch body 20 and the main circuit switch body 30 of the fusion switch 1 are closed by manual or electric operation, the energy storage module 13A can store energy and lock with the tripping module 17A; the tripping module 17A is connected to the main circuit switch body 30. The main circuit switch body 30 includes a magnetic induction coil 33. The magnetic induction coil 33 is electrically connected to the tripping module 17A through a circuit board 16. The magnetic induction coil 33 is used to sample the current of the main circuit of the fusion switch 1, and when the main circuit current is greater than a preset value, it drives the tripping module 17A to release the limitation with the energy storage module 13A through the circuit board 16, and the energy storage module 13A releases energy to make the main circuit switch body 30 trip and open.

[0038] Specifically, the present application provides a current-limiting tripping device 10, which is applied to a fusion switch 1. The fusion switch 1 includes a pre-charge circuit switch body 20 and a main circuit switch body 30. The current-limiting tripping device 10 is respectively connected to the pre-charge circuit switch body 20 and the main circuit switch body 30 to achieve the tripping and opening of the main circuit switch body 30 through the current-limiting tripping device 10.

[0039] The current-limiting tripping device 10 includes an operating mechanism, which is composed of an energy storage module 13A and a tripping module 17A. When the pre-charge circuit switch body 20 and the main circuit switch body 30 are closed by manual or electric operation, the energy storage module 13A can be driven by the manual or electric operation to rotate clockwise and lock with the tripping module 17A for energy storage, realizing the closing of the pre-charge circuit switch body 20 or the main circuit switch body 30.

[0040] The magnetic induction coil 33 on the main circuit switch body 30 can sample the current of the main circuit. The circuit board 16 can judge the magnitude relationship between the sampled current and the preset value of the main circuit current. When the main circuit current is greater than the preset value, the circuit board 16 can transmit a tripping signal to the tripping module 17A, so that the tripping module 17A is unlocked from the energy storage module 13A, and the energy storage module 13A rotates reversely to make the main circuit switch body 30 trip and open. At this time, the pre-charge circuit switch body 20 follows the main circuit switch body 30 to achieve tripping and opening.

[0041] Among them, the main circuit switch body 30 includes a plurality of stacked main switch units 30a. As Figure 5 shown, the main switch unit 30a is provided with a moving contact group 31 and a first static contact 321 and a second static contact 322 respectively located on both sides of the moving contact group 31. The moving contact group 31 has two moving contact pieces 31a, and the first static contact 321 and the second static contact 322 are respectively clamped between the two moving contact pieces 31a. The moving contact group 31 can be respectively inserted into the first static contact 321 and the second static contact 322, and the magnetic induction coil 33 is sleeved on the contact plate of the first static contact 321.

[0042] Through such a setting method, the current-limiting tripping device 10 can quickly trip and open when a large current appears in the main circuit. For example, when the preset current value is 2.5In and the main circuit current is greater than 2.5In, the current-limiting tripping device 10 can achieve quick tripping, timely protect the fusion switch 1, and improve the reliability and safety.

[0043] In addition to the above-mentioned current-limiting tripping device 10 sampling the current of the main circuit through the magnetic induction coil 33, the circuit board 16 determines the relationship between the sampled current value and the preset current value, and transmits a tripping signal to the tripping module 17A according to the determination result. The current-limiting tripping device 10 of the present application can also remotely trip the main circuit switch body 30 by means of remote control.

[0044] Specifically, the circuit board 16 is used to receive a remote tripping signal, and drive the tripping module 17A to release the limitation with the energy storage module 13A through the remote tripping signal. The energy storage module 13A releases energy to trip and open the main circuit switch body 30. The current-limiting tripping device 10 can quickly remotely trip the main circuit switch body 30 by means of remote control to protect and disconnect the integrated switch 1 in a timely manner.

[0045] It should be noted that, first, as Figure 2 and Figure 6 shown, in an implementable manner of the present application, the operating mechanism further includes an electromagnetic module. The electromagnetic module includes a tripping coil 11, an intermediate coil 12, and a closing coil 15. The tripping coil 11, the intermediate coil 12, and the closing coil 15 can drive the operating mechanism to be in the off state of the tripping position, the mid state of the intermediate position, and the on state of the closing position respectively through electric operation;

[0046] When the operating mechanism switches from the off state of the tripping position to the mid state of the intermediate position, the pre-charge circuit switch body 20 closes; when switching from the mid state of the intermediate position to the on state of the closing position, the pre-charge circuit switch body 20 does not operate and the main circuit switch body 30 closes;

[0047] When the operating mechanism switches from the on state of the closing position to the mid state of the tripping position, the main circuit switch body 30 trips; when switching from the mid state of the intermediate position to the off state of the tripping position, the pre-charge circuit switch body 20 trips.

[0048] Through the above-mentioned tripping coil 11, intermediate coil 12, and closing coil 15, the tripping and opening actions of the current-limiting tripping device 10 can be controlled in the form of electric operation.

[0049] Second, as Figure 4 shown, in another implementable manner of the present application, the operating mechanism further includes a handle 101. The handle 101 can drive the operating mechanism to be in the tripping position state, the intermediate position state, and the closing position state respectively, and then drive the energy storage module 13A and the tripping module 17A to achieve locking or unlocking.

[0050] Through the setting of the handle 101, the tripping and opening actions of the current-limiting tripping device 10 can be controlled in the form of manual operation.

[0051] For example, the electromagnetic module of the operating mechanism also includes a mechanism shaft 14, and the energy storage module 13A is transmission-connected to the mechanism shaft 14; the mechanism shaft 14 and the main circuit switch body 30 are linked; the mechanism shaft 14 is driven to rotate to drive the main circuit switch body 30 to trip and open the switch.

[0052] Specifically, Figure 1 As shown, the electromagnetic module also includes a mechanism shaft 14 and a linkage member 18 , and the operating mechanism can be linked with the pre-filling circuit switch body 20 through the linkage member 18 , and the operating mechanism can be linked with the main circuit switch body 30 through the mechanism shaft 14 .

[0053] Among them, the closing coil 15 and the opening coil 11 are both linked with the mechanism shaft 14 and the linkage part 18. The closing coil 15 and the opening coil 11 drive the linkage part 18 and the mechanism shaft 14 to move in sequence, so that the pre-charging circuit switch body 20 moves first and the main circuit switch body 30 moves later.

[0054] Taking the closing coil 15 as an example, by controlling the closing coil 15, the linkage 18 and the mechanism shaft 14 can be driven to move synchronously. When the linkage 18 moves, the pre-charging circuit switch body 20 linked with the linkage 18 is closed; when the pre-charging circuit switch body 20 is closed, the mechanism shaft 14 rotates synchronously to the middle position mi d. At this time, since the mechanism shaft 14 is limited at the middle position mi d by the intermediate coil 12, the mechanism shaft 14 cannot rotate at the middle position mi d and the main circuit switch body 30 does not move; and when the intermediate coil 12 releases the limit on the mechanism shaft 14, the mechanism shaft 14 can continue to rotate, driving the main circuit switch body 30 linked with the mechanism shaft 14 to close.

[0055] It can be seen that from the open position off to the middle position mid, the pre-charging circuit switch body 20 is closed, and the mechanism shaft 14 is restricted so that the main circuit switch body 30 does not move and remains in the open state; the restriction is released, the mechanism shaft 14 rotates from the middle position mid to the closed position on, and the main circuit switch body 30 is closed in the closed position on.

[0056] Similarly, when the control tripping coil 11 is working, it can drive the linkage 18 and the mechanism shaft 14 to move in the opposite direction. The linkage 18 moves in the opposite direction to drive the pre-charging circuit switch body 20 to open in the middle position mi d; the mechanism shaft 14 is restricted in the middle position. After the restriction is released, the mechanism shaft 14 continues to rotate in the opposite direction to drive the main circuit switch body 30 to open in the opening position off.

[0057] By setting the intermediate coil 12, the purpose of closing or opening the pre-charging circuit switch body 20 first and closing or opening the main circuit switch body 30 later is achieved.

[0058] The energy storage module 13A is sleeved on the mechanism rotating shaft 14. The mechanism rotating shaft 14 can be manually controlled by the handle 101 or electrically controlled by the tripping coil 11, the intermediate coil 12, and the closing coil 15 to drive the energy storage module 13A to rotate. During the rotation process, the energy storage module 13A locks and stores energy with the tripping module 17A to realize the closing of the main circuit switch body 30.

[0059] The mechanism rotating shaft 14 can be manually operated by the handle 101 or electrically controlled by the tripping coil 11, the intermediate coil 12, and the closing coil 15 to drive the energy storage module 13A to rotate in reverse. The energy storage module 13A releases energy and unlocks from the tripping module 17A to realize the tripping and opening of the main circuit switch body 30.

[0060] Exemplarily, as Figure 2 and Figure 3 shown, the tripping module 17A includes a tripping coil 171 and a tripping rod 170 connected to the tripping coil 171. The tripping rod 170 is arranged on one side of the energy storage module 13A and can be locked with the energy storage module 13A. The tripping coil 171 is electrically connected to the magnetic induction coil 33 on the main circuit switch body 30 through the circuit board 16. When the main circuit current is greater than the preset value, the tripping coil 171 drives the main circuit switch body 30 to trip and open.

[0061] Specifically, the tripping module 17A includes a tripping coil 171 and a tripping rod 170. The tripping coil 171 and the tripping rod 170 are connected. The tripping rod 170 is arranged on one side of the energy storage module 13A. The tripping coil 171 is connected to the magnetic induction coil 33 on the main circuit switch body 30 through the circuit board 16. The magnetic induction coil 33 can sample the current of the main circuit, and the circuit board 16 compares the magnitude of the current value sampled by the magnetic induction coil 33 with the preset current value to judge whether to send a tripping signal to the tripping module 17A. When the sampled main circuit current value is greater than the preset value, the circuit board 16 sends a tripping signal to the tripping coil 171 of the tripping module 17A to drive the tripping coil 171 and the intermediate coil 12 of the electromagnetic module to work simultaneously, so that the energy storage module 13A unlocks from the tripping rod 170 and quickly releases energy and rotates, thereby realizing the quick opening of the main circuit switch body 30.

[0062] In an implementable manner of the present application, as Figure 1 、as 2 and Figure 3 shown, the energy storage module 13A includes an energy storage member 13 and an energy storage spring 130 sleeved on the mechanism rotating shaft 14. When the main circuit switch body 30 closes, the mechanism rotating shaft 14 can drive the energy storage member 13 and the energy storage spring 130 to store energy. The energy storage member 13 can abut against the tripping rod 170 to lock the energy storage module 13A. When the energy storage member 13 unlocks from the tripping rod 170, the energy storage module 13A releases energy to make the main circuit switch body 30 trip and open.

[0063] Specifically, the energy storage module 13A includes an energy storage member 13 and an energy storage spring 130. The energy storage spring 130 and the energy storage member 13 are sequentially sleeved on the mechanism rotating shaft 14. When the handle 101 or the opening coil 11, the intermediate coil 12, and the closing coil 15 drive the mechanism rotating shaft 14 to rotate, the energy storage spring 130 and the energy storage member 13 can be driven to rotate simultaneously. During the rotation, the energy storage spring 130 stores energy, and the energy storage member 13 can be locked with the tripping lever 170.

[0064] When the main circuit current of the main circuit switch body 30 is greater than the preset value, the tripping coil 171 and the intermediate coil 12 of the electromagnetic module work simultaneously, so that the energy storage member 13 is unlocked from the tripping lever 170. At this time, the energy storage spring 130 releases energy and rotates in the reverse direction, so that the main circuit switch body 30 trips and opens.

[0065] Optionally, as Figure 2 and Figure 3 shown, the energy storage member 13 is provided with a first abutting portion 131 and a second abutting portion 132 protruding therefrom, and the tripping lever 170 is provided with a locking portion 170a; the first abutting portion 131 can abut against or separate from the locking portion 170a to store energy and lock or unlock the opening during the closing of the main circuit switch body 30; the second abutting portion 132 is used to abut against or separate from the locking portion 170a to store energy and lock or unlock the opening during the closing of the pre-charge circuit switch body 20.

[0066] Specifically, the energy storage member 13 is in a disc shape, and the first abutting portion 131 and the second abutting portion 132 protrude from its edge at intervals. Correspondingly, a locking portion 170a protrudes from the side of the tripping lever 170 facing the energy storage member 13;

[0067] The first abutting portion 131 is used to abut against or separate from the locking portion 170a to store energy, lock, or unlock the opening at position I during the closing of the pre-charge circuit switch body 20; the second abutting portion 132 is used to abut against or separate from the locking portion 170a to store energy, lock, or unlock the opening at position II during the closing of the main circuit switch body 30; position I is the energy storage position when the pre-charge circuit switch body 20 is closed, and position II is the energy storage position when the main circuit switch body 30 is closed.

[0068] As Figure 3 shown, when the mechanism rotating shaft 14 is driven by the closing coil 15 or the handle 101 to drive the energy storage member 13 and the energy storage spring 130 to rotate clockwise, the second abutting portion 132 can first abut against the locking portion 170a. At this time, the energy storage member 13 and the energy storage spring 130 store energy and are locked to realize the closing of the pre-charge circuit switch body 20;

[0069] When the mechanism rotating shaft 14 is driven by the opening coil 11 or the handle 101 to drive the energy storage member 13 and the energy storage spring 130 to rotate counterclockwise in the reverse direction, the second abutting portion 132 can be unlocked from the locking portion 170a. At this time, the energy storage member 13 and the energy storage spring 130 release energy to realize the opening of the pre-charge circuit switch body 20;

[0070] As Figure 2 shown, when the mechanism rotating shaft 14 is driven by the closing coil 15 or the handle 101 to drive the energy storage member 13 and the energy storage spring 130 to rotate clockwise, the first abutting portion 131 can abut against the locking portion 170a. At this time, the energy storage member 13 and the energy storage spring 130 store energy and are locked to realize the closing of the main circuit switch body 30;

[0071] When the mechanism rotating shaft 14 is driven by the opening coil 11 or the handle 101 to drive the energy storage member 13 and the energy storage spring 130 to rotate counterclockwise in the reverse direction, the first abutting portion 131 can be unlocked from the locking portion 170a. At this time, the energy storage member 13 and the energy storage spring 130 release energy to realize the opening of the main circuit switch body 30.

[0072] When the main circuit current is greater than the preset value, the tripping coil 171 and the intermediate coil 12 work simultaneously to enable the energy storage module 13A to release energy and rotate in the reverse direction, so that the main circuit switch body 30 trips and opens.

[0073] When the operating mechanism is switched from the on state of the closing position to the off state of the opening position, the mechanism rotating shaft 14 releases energy so that the first abutting portion 131 cancels the abutment with the locking portion 170a, and the main circuit switch body 30 trips and opens;

[0074] When the operating mechanism is switched from the mid state of the intermediate position to the off state of the opening position, the mechanism rotating shaft 14 releases energy so that the second abutting portion 132 cancels the abutment with the locking portion 170a, and the pre-charge circuit switch body 20 trips and opens.

[0075] On the other hand, the present invention provides a fusion switch 1, as Figure 4 shown, including a current-limiting tripping device 10 and a pre-charge circuit switch body 20 and a main circuit switch body 30 respectively connected to the current-limiting tripping device 10;

[0076] By manually or electrically controlling the operating mechanism of the current-limiting tripping device 10, when closing, the pre-charge circuit switch body 20 is driven to close first, and then the main circuit switch body 30 closes. After the main circuit switch body 30 closes, it drives the pre-charge circuit switch body 20 to open; when opening, it drives the main circuit switch body 30 to open.

[0077] Specifically, the present application also provides a fusion switch 1, which includes a current-limiting tripping device 10, a pre-charge circuit switch body 20 and a main circuit switch body 30 respectively connected to the current-limiting tripping device 10; by manually or electrically controlling the operating mechanism of the current-limiting tripping device 10, the pre-charge circuit switch body 20 is driven to close first and the main circuit switch body 30 is driven to close later when closing, and after the main circuit switch body 30 closes, the pre-charge circuit switch body 20 is driven to open; when opening, the main circuit switch body 30 is driven to open.

[0078] Among them, the main circuit switch body 30 is the main structure that needs to be conducted when the fusion switch 1 works normally, while the pre-charge circuit switch body 20 is a transitional auxiliary structure that is pre-conducted before the main circuit switch body 30 is conducted, so as to avoid generating sparks or damaging the fusion switch 1 due to suddenly conducting the main circuit switch body 30.

[0079] The main circuit switch body 30 can sample the current of the main circuit of the fusion switch 1. When the main circuit current is greater than a preset value, the tripping module 17A in the current-limiting tripping device 10 can unlock the energy storage module 13A, and the energy storage module 13A rotates reversely to make the main circuit switch body 30 trip and open. Among them, the specific structure and beneficial effects of the current-limiting tripping device 10 have been introduced in detail above and will not be elaborated here.

[0080] The above-mentioned fusion switch 1 can achieve rapid tripping through manual and electric operations. When a large current appears in the main circuit, it can quickly trip and open, providing timely protection for the fusion switch 1 and improving reliability and safety.

[0081] The above are only optional embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0082] In addition, it should be noted that in the above specific embodiments, the various specific technical features described can be combined in any suitable way without contradiction. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

Claims

1. A current-limiting tripping device, characterized in that, The invention comprises an operating mechanism, wherein the operating mechanism comprises an energy storage module (13A) and a tripping module (17A); when the pre-charging circuit switch body (20) and the main circuit switch body (30) of the fusion switch (1) are closed by manual or electric operation, the energy storage module (13A) can store energy and lock with the tripping module (17A); the tripping module (17A) is connected to the main circuit switch body (30); the main circuit switch body (30) comprises a magnetic induction coil (33); the magnetic induction coil (33) is electrically connected to the tripping module (17A) through a circuit board (16); the magnetic induction coil (33) is used to sample the current of the main circuit of the fusion switch (1); and when the main circuit current is greater than a preset value, the tripping module (17A) is driven through the circuit board (16) to release the restriction with the energy storage module (13A); the energy storage module (13A) releases energy to cause the main circuit switch body (30) to trip and open.

2. The current-limiting tripping device according to claim 1, characterized in that, The circuit board (16) is used to receive a remote tripping signal and drive the tripping module (17A) and the energy storage module (13A) to release the restriction through the remote tripping signal, and the energy storage module (13A) releases energy to trip and open the main circuit switch body (30).

3. The current-limiting tripping device according to claim 1, characterized in that, The operating mechanism further comprises an electromagnetic module, the electromagnetic module comprises a mechanism shaft (14), the energy storage module (13A) is drivingly connected to the mechanism shaft (14); the mechanism shaft (14) and the main circuit switch body (30) are linked; the mechanism shaft (14) is driven to rotate, so as to drive the main circuit switch body (30) to trip and open.

4. The current-limiting tripping device according to claim 3, characterized in that, The tripping module (17A) comprises a tripping coil (171) and a tripping rod (170) connected to the tripping coil (171); the tripping rod (170) is arranged on one side of the energy storage module (13A) and can be locked with the energy storage module (13A); the tripping coil (171) is electrically connected to the magnetic induction coil (33) on the main circuit switch body (30) through the circuit board (16); the magnetic induction coil (33) can sample the main circuit current of the main circuit switch body (30); when the main circuit current is greater than a preset value, the tripping coil (171) drives the main circuit switch body (30) to trip and open.

5. The current-limiting tripping device according to claim 4, wherein, The energy storage module (13A) comprises an energy storage component (13) and an energy storage spring (130) sleeved on the mechanism rotating shaft (14); when the main circuit switch body (30) is closed, the mechanism rotating shaft (14) can drive the energy storage component (13) and the energy storage spring (130) to store energy, and the energy storage component (13) can abut against the tripping rod (170) to lock the energy storage module (13A); when the energy storage component (13) and the tripping rod (170) are unlocked, the energy storage module (13A) releases energy to trip and open the main circuit switch body (30).

6. The current-limiting tripping device according to claim 5, characterized in that, The energy storage component (13) is convexly provided with a first abutting portion (131) and a second abutting portion (132), and a locking portion (170a) is provided on the tripping lever (170); the first abutting portion (131) can abut against or separate from the locking portion (170a) to store energy and lock or unlock the opening when the main circuit switch body (30) is closed; the second abutting portion (132) is used to abut against or separate from the locking portion (170a) to store energy and lock or unlock the opening when the pre-charge circuit switch body (20) is closed.

7. The current-limiting tripping device according to claim 6, wherein The electromagnetic module further includes a tripping coil (11), an intermediate coil (12) and a closing coil (15), and the tripping coil (11), the intermediate coil (12) and the closing coil (15) can drive the operating mechanism to be in the off state, the mid state and the on state respectively through electric operation; When the operating mechanism switches from the on state to the off state, the mechanism rotating shaft (14) releases energy so that the first abutting portion (131) cancels abutting against the locking portion (170a), and the main circuit switch body (30) trips and opens; When the operating mechanism switches from the mid state to the off state, the mechanism rotating shaft (14) releases energy so that the second abutting portion (132) cancels abutting against the locking portion (170a), and the pre-charge circuit switch body (20) trips and opens.

8. The current-limiting tripping device according to claim 1, characterized in that, The main circuit switch body (30) includes a plurality of stacked main switch units (30a), the main switch unit (30a) is provided with a moving contact group (31) and a first static contact (321) and a second static contact (322) respectively located on both sides of the moving contact group (31), the moving contact group (31) can be inserted into the first static contact (321) and the second static contact (322) respectively, and the magnetic induction coil (33) is sleeved on the contact plate of the first static contact (321).

9. The current-limiting tripping device according to claim 7, characterized in that, The first abutting portion (131) is locked with the locking portion (170a), and the main circuit switch body (30) is closed; when the main circuit current is greater than a preset value, the tripping coil (171) and the intermediate coil (12) work simultaneously to release the energy of the energy storage module (13A) and rotate reversely, so that the main circuit switch body (30) trips and opens.

10. A fusion switch, characterized in that, Including the current-limiting tripping device (10) described in any one of the above claims 1-9 and a pre-charge circuit switch body (20) and a main circuit switch body (30) respectively connected to the current-limiting tripping device (10); By manually or electrically controlling the operating mechanism of the current-limiting tripping device (10), the pre-charge circuit switch body (20) is first closed when closing, and the main circuit switch body (30) is then closed. After the main circuit switch body (30) is closed, the pre-charge circuit switch body (20) is driven to open; when opening, the main circuit switch body (30) is driven to open.

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