disconnector

Abstract

The isolating switch of the present application is provided with a driving mechanism and arc contacts composed of a static arc contact and a dynamic arc contact on the basis of the main contacts composed of a static main contact and a dynamic main contact. The dynamic main contact is first separated from the static main contact, so that the current is transferred between the dynamic arc contact and the static arc contact. Then the dynamic arc contact is separated from the static arc contact, and when the dynamic arc contact moves away from the static arc contact, the driving mechanism drives the static arc contact to rotate in the direction away from the dynamic arc contact. On the basis of the displacement of the original dynamic arc contact, the displacement of the static arc contact is superimposed, which can significantly increase the separation speed of the static arc contact and the dynamic arc contact and the distance between the dynamic arc contact and the static arc contact after the switch is closed.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a disconnecting switch. Background Technology

[0002] DC disconnect switches are an important electrical device in DC power systems, and their breaking performance directly affects system safety. Because DC systems do not have a natural zero-crossing phenomenon compared to AC systems, they cannot extinguish the arc instantaneously when the AC current crosses zero. Instead, they must rely on rapidly elongating and cooling the arc to make the arc voltage exceed the power supply voltage, and then extinguish the arc. This places extremely high demands on the contact gap and breaking speed.

[0003] To improve breaking capacity, existing technologies have introduced arc contacts, consisting of stationary and moving main contacts, in addition to the main contacts. These arc contacts open after the main contacts have opened, controlling the arc's position to protect the main contacts. However, in existing technologies, the breaking speed and final opening distance of the arc contacts are still limited by the internal space of the disconnector. Utility Model Content

[0004] The purpose of this invention is to overcome at least one defect of the prior art and provide an isolating switch.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A disconnecting switch includes a housing and a stationary contact assembly, a moving contact assembly, and an operating mechanism respectively disposed within the housing. The operating mechanism drives the moving contact assembly to contact or separate from the stationary contact assembly to achieve closing or opening of the circuit.

[0007] The stationary contact assembly includes a fixed stationary main contact and a rotatable stationary arc contact, wherein the stationary main contact and the stationary arc contact are connected at the same potential.

[0008] The moving contact assembly includes a moving main contact corresponding to the stationary main contact and a moving arc contact corresponding to the stationary arc contact, wherein the moving main contact and the moving arc contact are connected at the same potential.

[0009] It also includes the drive mechanism;

[0010] When the circuit breaker is opened, the moving main contact first separates from the stationary main contact, allowing the current to transfer between the moving arc contact and the stationary arc contact. Subsequently, the moving arc contact separates from the stationary arc contact, and when the moving arc contact moves away from the stationary arc contact, the driving mechanism drives the stationary arc contact to rotate in a direction away from the moving arc contact.

[0011] Preferably, the driving mechanism is a linkage rod, which connects the moving contact assembly and the stationary arc contact.

[0012] Preferably, the linkage rod is rotatably connected to the stationary arc contact and the moving contact assembly via a first linkage shaft and a second linkage shaft, respectively. At the instant the moving arc contact contacts the stationary arc contact during the closing process, the axis of the first linkage shaft, the axis of the second linkage shaft, and the rotation axis of the moving contact assembly are located in the same plane.

[0013] Preferably, the stationary contact assembly is located below the moving contact assembly and spaced apart from the rotation axis of the moving contact assembly, forming a movement space between the rotation axes of the stationary and moving contact assemblies. The moving contact assembly has an extension boss extending downward into the movement space. The linkage rod is rotatably connected to the stationary arc contact and the moving contact assembly via a first linkage shaft and a second linkage shaft, respectively. The extension boss is rotatably connected to one end of the linkage rod via the second linkage shaft, and the other end of the linkage rod is rotatably connected to the stationary arc contact via the first linkage shaft. When the moving contact assembly rotates towards the stationary contact assembly, the extension boss drives the linkage rod to rotate into the movement space, causing the axis of the second linkage shaft to move between the axis of the first linkage shaft and the rotation axis of the moving contact assembly.

[0014] Preferably, the moving contact assembly includes a plurality of moving main contacts, each moving main contact having a moving main contact portion that contacts the stationary main contact, and at least one moving main contact extending in a direction away from the rotation axis of the moving contact assembly to form a moving arc contact, the moving arc contact having a moving arc contact portion that contacts the stationary arc contact.

[0015] Preferably, the stationary arc contact includes a rotating part rotatably disposed on the stationary main contact, and a swinging part and a linkage part disposed opposite to each other on both sides of the rotating part. The rotating part is provided with a stationary mounting hole, which is rotatably connected to the stationary main contact through a stationary mounting shaft. The linkage part is provided with a first linkage hole, which is rotatably connected to a linkage rod through a first linkage shaft. The swinging part is provided with a stationary arc contact part corresponding to the moving arc contact.

[0016] Preferably, the stationary main contact includes a support plate, the top of the support plate is provided with a stationary main contact portion that cooperates with the moving main contact, the middle of the support plate is provided with a first clearance groove, and the stationary arc contact passes through the first clearance groove and is rotatably connected to the linkage rod.

[0017] Preferably, the stationary main contact further includes a mounting plate connected to the support plate. The mounting plate is provided with a mounting platform located at the connection between the mounting plate and the support plate. The mounting plate, mounting platform, and support plate are an integral structure. The mounting platform has a mounting groove in the middle that communicates with the first clearance groove. A stationary mounting shaft is provided in the mounting groove. The stationary arc contact is rotatably sleeved on the stationary mounting shaft and is equipotentially connected to the support plate. The mounting plate is provided with a second clearance groove for avoiding the swinging part.

[0018] Preferably, the moving contact assembly includes a contact support, a limiting member, and a plurality of moving main contacts. The contact support is rotatably connected to the housing via a support shaft, the axis of which serves as the rotation axis of the moving contact assembly. A moving mounting shaft is provided on the contact support, and the plurality of moving main contacts are rotatably mounted on the mounting shaft and spaced apart along the axial direction of the moving mounting shaft. A contact spring is provided between the moving main contacts and the contact support. The limiting member includes a clamping plate matching the number of gaps between the moving main contacts, and a partition plate connecting the ends of the plurality of clamping plates. The clamping plate is embedded in the gap between adjacent moving main contacts. The partition plate is located on the radial side of the contact support and has an extending boss. The end of the extending boss is rotatably connected to the linkage rod.

[0019] Preferably, when the moving contact assembly rotates toward the stationary contact assembly to perform a closing operation, the contact support drives the moving arc contact to contact the stationary arc contact first, and then the moving main contact contacts the stationary main contact; after the moving main contact contacts the stationary main contact, the contact support continues to rotate, driving the moving arc contact to rotate and separate from the stationary arc contact;

[0020] When the moving contact assembly rotates away from the stationary contact assembly to perform the opening operation, the contact support drives the moving arc contact to make contact with the stationary arc contact first, then the moving main contact separates from the stationary main contact, and then the stationary arc contact separates from the moving arc contact.

[0021] The disconnecting switch of this application, based on the main contacts composed of stationary main contacts and moving main contacts, also includes an arc contact composed of stationary arc contacts and moving arc contacts. Furthermore, by controlling the separation sequence of the moving arc contacts and stationary arc contacts, the position of the arc is controlled between the moving arc contacts and stationary arc contacts, preventing the arc from appearing between the moving main contacts and stationary main contacts, thereby protecting the moving main contacts and stationary main contacts. It has the following beneficial effects:

[0022] 1. Increased breaking speed: The stationary arc contact is driven away from the moving arc contact by the drive mechanism, which enables the stationary arc contact to separate from the moving arc contact more quickly compared to the fixed stationary arc contact;

[0023] 2. Significantly increased opening distance: During opening, the displacement of the stationary arc contact is superimposed on the original displacement of the moving arc contact, which can significantly increase the distance between the moving arc contact and the stationary arc contact after opening, thus lengthening the arc;

[0024] 3. Compact structure: No need to increase the distance between the moving main contact and the stationary main contact, ensuring the overall compactness of the disconnecting switch structure.

[0025] Furthermore, by coupling the moving arc contact and the stationary arc contact through a linkage rod, when the moving arc contact rotates in one direction, it can automatically drive the stationary arc contact to rotate in the opposite direction. When the moving arc contact rotates clockwise toward the stationary arc contact, the linkage rod drives the stationary arc contact to rotate counterclockwise toward the moving arc contact. When the moving arc contact rotates counterclockwise away from the stationary arc contact, the linkage rod drives the stationary arc contact to rotate clockwise away from the moving arc contact. No complex mechanism is required for control, which has the characteristics of simple structure and high reliability.

[0026] Furthermore, at the instant the moving arc contact and the stationary arc contact come into contact during the closing process, the axis of the first linkage shaft, the axis of the second linkage shaft, and the rotation axis of the moving contact assembly are located in the same plane, that is, the linkage rod reaches the dead point position. The linkage rod constrains the stationary arc contact, preventing the stationary arc contact from retracting and ensuring reliable contact between the stationary arc contact and the moving arc contact. Attached Figure Description

[0027] Figure 1 This is a diagram showing the disconnector switch in the open state;

[0028] Figure 2 This is a state diagram showing the opening and closing states of a disconnecting switch;

[0029] Figure 3 This is a diagram showing the state of the disconnector when the moving arc contact and the stationary arc contact are in contact.

[0030] Figure 4 This is a diagram showing the closed state of the disconnector switch;

[0031] Figure 5 This is a structural schematic diagram of the stationary contact assembly;

[0032] Figure 6 This is a schematic diagram of the static arc contact.

[0033] Figure 7 This is a side view of the moving contact assembly and the housing;

[0034] Figure 8 This is a schematic diagram of the moving contact assembly;

[0035] Figure 9 This is a structural schematic diagram of the limiting component;

[0036] Figure 10 This is a schematic diagram of the linkage mechanism;

[0037] In the diagram: 1. Housing; 2. Stationary main contact; 3. Stationary arc contact; 4. Moving main contact; 5. Moving arc contact; 6. Linkage rod; 7. Movement space; 8. Contact support; 9. Limiting element; 11. Arc extinguishing system; 12. Operating mechanism; 21. Support plate; 22. Mounting plate; 23. Mounting platform; 24. Mounting slot; 30. Stationary arc contact part; 31. Rotating part; 32. Linkage part; 33. Swinging part; 50. Moving arc contact part; 61. Linkage convexity 62. Second linkage shaft; 63. Linkage column; 80. Support shaft; 81. Moving mounting shaft; 82. Contact spring; 90. Extension boss; 91. Clamping plate; 92. Partition plate; 121. Main shaft; 122. Linkage mechanism; 123. Cantilever; 211. Stationary main contact part; 212. First clearance groove; 221. Second clearance groove; 311. First linkage hole; 312. First linkage shaft; 313. Stationary mounting hole; 314. Stationary mounting shaft. Detailed Implementation

[0038] The specific embodiments of the disconnecting switch of this utility model are further described below with reference to the accompanying drawings. The disconnecting switch of this utility model is not limited to the description of the following embodiments.

[0039] like Figure 1-4 As shown, the disconnecting switch of this embodiment includes a housing 1 and a stationary contact assembly, a moving contact assembly, an arc extinguishing system 11, and an operating mechanism 12 respectively disposed in the housing 1. The operating mechanism 12 is used to provide driving force to the moving contact assembly, causing the moving contact assembly to contact and separate from the stationary contact assembly, so as to realize closing and opening. The arc extinguishing system 11 is provided with a plurality of arc extinguishing grids, which are used to extinguish the electric arc generated between the moving contact assembly and the stationary contact assembly. The operating mechanism 12 includes a main shaft 121, an energy storage mechanism, a linkage mechanism 122, an energy storage shaft, a cam mechanism, and two side plates. The main shaft 121 and the energy storage shaft are rotatably mounted on the two side plates. The linkage mechanism 122, the cam mechanism, and the energy storage mechanism are mounted between the two side plates. The main shaft 121 is used to connect with the moving contact assembly and can rotate between the main shaft closed position and the main shaft open position, causing the moving contact assembly to swing and contact or separate from the stationary contact assembly. The linkage mechanism 122 is connected to the main shaft 121. The main shaft 121 is provided with a cantilever 123 connected to the moving contact assembly. The cam mechanism is fixed on the energy storage shaft and is used to drive the energy storage mechanism to store energy. When the energy storage mechanism releases energy, it drives the linkage mechanism 122 to drive the main shaft 121 to rotate from the main shaft open position to the main shaft closed position.

[0040] The energy storage mechanism includes an energy storage spring, a closing half-shaft, and a locking lever (not shown in the figure). Before closing, the energy storage mechanism needs to store energy. During energy storage, the energy storage shaft is driven manually or by an electric motor to rotate the cam mechanism. The cam mechanism drives the energy storage spring to store energy. When the energy storage spring has finished storing energy, the closing half-shaft limits the locking lever and locks the cam mechanism through the locking lever. The cam mechanism prevents the energy storage spring from releasing energy, thereby locking the energy storage mechanism in the energy storage state, so that the operating mechanism 12 is in a stable energy storage state. When the circuit breaker is in the open state and the energy storage mechanism is in the energy storage state, the closing half-shaft can be driven to rotate by the closing button or the closing electromagnetic mechanism, so that the closing half-shaft releases the limiting effect on the locking lever, thereby releasing the energy storage mechanism. The released energy storage mechanism drives the linkage mechanism 122 to drive the main shaft 121 to rotate from the main shaft open position to the main shaft closed position, driving the moving contact to contact the stationary contact, thereby realizing the closing. In this embodiment, the operating mechanism 12 automatically starts energy storage after the circuit closure is completed. The energy storage shaft is driven by a motor to ensure that energy storage is completed automatically before each circuit closure. Of course, manual operation can also be selected to drive the energy storage shaft for energy storage.

[0041] The linkage mechanism 122 typically includes a transmission component and a tripping half-shaft for locking the transmission component. When the tripping half-shaft locks the transmission component, the linkage mechanism 122 can drive the main shaft 121 to rotate, causing the moving contact assembly to contact and separate from the stationary contact assembly via the main shaft 121. When the moving contact assembly contacts the stationary contact assembly, the opening spring stores energy. When the tripping half-shaft unlocks the transmission component, it releases the opening spring. The release of energy from the opening spring, via the linkage mechanism 122, drives the main shaft 121 to rotate from the main shaft closed position to the main shaft open position, separating the moving contact assembly from the stationary contact assembly. A tripping button or tripping electromagnetic mechanism can drive the tripping half-shaft to rotate and unlock the transmission component, thus opening the disconnecting switch. The disconnecting switch also includes a protection mechanism. In the event of overload, short circuit, or other faults, the protection mechanism triggers, driving the tripping half-shaft to unlock the transmission component and release the opening spring. The operating mechanism 12, via the linkage mechanism 122, drives the main shaft 121 to rotate, separating the moving contact assembly from the stationary contact assembly. The operating mechanism 12 is existing technology in this field and will not be described in detail here.

[0042] like Figure 1-4 As shown in this embodiment:

[0043] The stationary contact assembly includes a fixed stationary main contact 2 and a stationary arc contact 3 disposed on one side of the stationary main contact 2. The stationary main contact 2 and the stationary arc contact 3 are connected at the same potential, and the stationary arc contact 3 can rotate relative to the stationary main contact 2.

[0044] The moving contact assembly includes a moving main contact 4 corresponding to the stationary main contact 2 and a moving arc contact 5 corresponding to the stationary arc contact 3. The moving main contact 4 and the moving arc contact 5 are connected at the same potential.

[0045] like Figure 3 As shown, during the opening process, the moving main contact 4 separates from the stationary main contact 2 first, allowing the current to transfer between the moving arc contact 5 and the stationary arc contact 3. Subsequently, the moving arc contact 5 separates from the stationary arc contact 3, controlling the arc position between the moving arc contact 5 and the stationary arc contact 3. In the prior art, the stationary arc contact 3 is usually fixed. The speed at which the stationary arc contact 3 separates from the moving arc contact 5 and the final opening distance depend on the movement of the moving arc contact 5. However, the movement space of the moving arc contact 5 is limited by the internal structure of the disconnecting switch.

[0046] When the circuit is closed, the moving arc contact 5 and the stationary arc contact 3 make contact first. Because of the overtravel of the moving contact, the moving contact assembly can continue to rotate, causing the moving main contact 4 to make contact with the stationary main contact 2. After the main contact 4 makes contact with the stationary main contact 2, it lifts up the moving arc contact 5, causing the moving arc contact 5 to rotate and separate from the stationary arc contact 3. The moving main contact 4 and the stationary main contact 2 then carry the conducting current.

[0047] like Figure 5 As shown, one improvement in this embodiment is that the static arc contact 3 is rotatably mounted;

[0048] It also includes a drive mechanism. When the moving arc contact 5 moves away from the stationary arc contact 3, the drive mechanism drives the stationary arc contact 3 to rotate away from the moving arc contact 5, so that the moving arc contact 5 and the stationary arc contact 3 open quickly.

[0049] In this embodiment, the disconnecting switch, based on the main contacts formed by the stationary main contact 2 and the moving main contact 4, also includes an arc contact formed by the stationary arc contact 3 and the moving arc contact 5. Furthermore, by controlling the separation sequence of the moving arc contact 5 and the stationary arc contact 3, the position of the arc is controlled between the moving arc contact 5 and the stationary arc contact 3, preventing the arc from appearing between the moving main contact 4 and the stationary main contact 2, thereby protecting the moving main contact 4 and the stationary main contact 2. It also has the following beneficial effects:

[0050] 1. Increased breaking speed: The stationary arc contact 3 is driven away from the moving arc contact 5 by the drive mechanism, which enables the stationary arc contact 3 to separate from the moving arc contact 5 more quickly than the fixed stationary arc contact 3.

[0051] 2. Significantly increased opening distance: During opening, the displacement of the stationary arc contact 3 is superimposed on the original displacement of the moving arc contact 5, which can significantly increase the distance between the moving arc contact 5 and the stationary arc contact 3 after opening.

[0052] 3. Compact structure: There is no need to increase the distance between the moving main contact 4 and the stationary main contact 2, ensuring the overall compactness of the disconnecting switch structure.

[0053] like Figure 1-4 In the preferred embodiment shown, the driving mechanism is a linkage rod 6, which connects the moving contact assembly and the stationary arc contact 3.

[0054] The static arc contact 3 is rotatably disposed in the middle, its first end is rotatably connected to the linkage rod 6, and its last end is provided with a static arc contact part 30 corresponding to the dynamic arc contact part 50;

[0055] When the circuit is closed, the moving contact assembly drives the moving arc contact 5 to rotate close to the stationary arc contact 3, and pushes the first end of the stationary arc contact 3 through the linkage rod 6, so that the stationary arc contact part 30 at the end of the stationary arc contact 3 approaches the moving arc contact part 50.

[0056] When the circuit is opened, the moving contact assembly drives the moving arc contact 5 to rotate away from the stationary arc contact 3. The linkage rod 6 pulls the beginning of the stationary arc contact 3, so that the stationary arc contact part 30 at the end of the stationary arc contact 3 moves away from the moving arc contact part 50.

[0057] In this embodiment, the moving contact assembly and the stationary arc contact 3 are connected by a linkage rod 6. When the moving arc contact 5 rotates in one direction, it can automatically drive the stationary arc contact 3 to rotate. When the moving arc contact 5 rotates clockwise toward the stationary arc contact 3, the linkage rod 6 drives the stationary arc contact 3 to rotate counterclockwise toward the moving arc contact 5. When the moving arc contact 5 rotates counterclockwise away from the stationary arc contact 3, the linkage rod 6 drives the stationary arc contact 3 to rotate clockwise away from the moving arc contact 5. No complex mechanism is required for control, which has the characteristics of simple structure and high reliability.

[0058] As another embodiment of the drive mechanism, it includes multiple linkage rods connecting the moving contact assembly and the stationary arc contact 3. These linkage rods are symmetrically arranged to balance the forces on both sides. Furthermore, the multiple linkage rods can be sequentially hinged to form a multi-stage transmission, allowing the moving contact assembly and the stationary arc contact 3 to be coupled through this multi-stage transmission.

[0059] As another embodiment of the drive mechanism, the drive mechanism includes a return spring (not shown in the figure) that drives the stationary arc contact 3 away from the moving arc contact 5, and a latching mechanism for locking the return spring in an energy storage state. When closing, the return spring is compressed by the moving contact assembly. When opening, the latching mechanism is triggered to release by the moving contact assembly, or by a mechanism such as an electromagnet instead of the moving contact assembly to trigger the latching mechanism to release. The return spring drives the stationary arc contact 3 away from the moving arc contact 5.

[0060] like Figure 3As shown, preferably, the linkage 6 is rotatably connected to the stationary arc contact 3 and the moving contact assembly via a first linkage shaft 312 and a second linkage shaft 62, respectively. During the closing process, at the instant the moving arc contact 5 contacts the stationary arc contact 3, the linkage 6 reaches its dead position. The axes of the first linkage shaft 312, the second linkage shaft 62, and the rotation axis of the moving contact assembly are located in the same plane. The axis of the second linkage shaft 62 is located between the axis of the first linkage shaft 312 and the axis of the moving contact assembly, i.e., the first... The line connecting the axis of the first linkage shaft 312 and the axis of the second linkage shaft 62 passes through the axis of the moving contact assembly. When the moving arc contact 5 strikes the stationary arc contact 3, the force on the stationary arc contact 3 is transmitted to the moving arc contact 5 along the axis of the linkage rod 6. This force passes through the axis of the contact assembly and has zero lever arm, so it cannot generate torque to drive the moving arc contact 5 to rotate. At the same time, the linkage rod 6 remains stationary. By keeping the stationary linkage rod 6 constraining the stationary arc contact 3, the stationary arc contact 3 is prevented from retracting, ensuring reliable contact between the stationary arc contact 3 and the moving arc contact 5. In addition, by linking the stationary arc contact 3 and the moving arc contact 5 with the linkage rod 6, not only can the stationary arc contact 3 and the moving arc contact 5 be driven to separate quickly during opening, but the stationary arc contact 3 can also be driven to contact the moving arc contact 5 first during closing, and then the stationary main contact 2 can contact the moving main contact 4. It should be noted that this is a preferred solution in this application, but not a necessary solution, because the stationary arc contact 3 and the moving arc contact 5 will eventually separate after contact during the closing and opening processes.

[0061] Furthermore, the stationary contact assembly is located below the moving contact assembly and spaced apart from the rotation axis of the moving contact assembly, forming a motion space 7 between the rotation axes of the stationary and moving contact assemblies. The moving contact assembly is provided with an extension boss 90 extending downward into the motion space 7. The extension boss 90 is rotatably connected to one end of the linkage rod 6 via a second linkage shaft 62, and the other end of the linkage rod 6 is rotatably connected to the stationary arc contact 3 via a first linkage shaft 312. When the moving contact assembly rotates towards the stationary contact assembly, the extension boss 90 drives the linkage rod 6 to rotate into the motion space 7, causing the axis of the second linkage shaft 62 to move to a position between the axis of the first linkage shaft 312 and the rotation axis of the moving contact assembly. The motion space 7 ensures that the linkage rod 6 rotates to the dead position when the circuit is closed, eliminating the risk of the stationary arc contact 3 retracting.

[0062] like Figure 7-8As shown, the moving arc contact 5 and the moving main contact 4 are integrally formed. In this embodiment, the moving contact assembly includes multiple moving main contacts 4. Each moving main contact 4 has an active contact point that contacts the stationary main contact 2. At least one moving main contact 4 extends away from the rotation axis of the moving contact assembly to form the moving arc contact 5. The moving arc contact 5 has a moving arc contact point 50 that contacts the stationary arc contact 3. The moving contact assembly also includes a contact support 8 and a limiting member 9. The limiting member 9 and the moving main contact 4 are rotatably mounted on the contact support 8. The contact support 8 is rotatably connected to the housing 1 via a support shaft 80. The axis of the support shaft 80 serves as the axis of the contact support 8. The linkage rod 6 is rotatably connected to the limiting member 9. When the operating mechanism 12 drives the moving main contact 4 to rotate via the contact support 8, the limiting member 9 drives the stationary arc contact 3 to rotate via the linkage rod 6.

[0063] Specifically, the moving contact assembly includes multiple moving main contacts 4. The contact support 8 is provided with a moving mounting shaft 81 and a contact spring 82. The multiple moving main contacts 4 are arranged axially at intervals along the moving mounting shaft 81. The moving main contacts 4 are provided with a contact spring 82 between them and the contact support 8. The moving main contacts 4 are pressed against the contact support 8 under the drive of the contact spring 82 and rotate around the support shaft 80 with the contact support 8. The limiting member 9 includes a clamping plate 91 that matches the number of gaps between the moving main contacts 4 and a partition plate 92 that connects the ends of the multiple clamping plates 91. The clamping plate 91 is embedded in the gap between adjacent moving main contacts 4. The partition plate 92 is located on one radial side of the contact support 8 and is rotatably connected to the linkage rod 6. When the contact support 8 rotates, it pushes the partition plate 92, which in turn drives the stationary arc contact 3 to rotate through the linkage rod 6.

[0064] When the circuit is closed, that is, when the moving contact assembly rotates towards the stationary contact assembly, the contact support 8 causes the moving arc contact 5 to first contact the stationary arc contact 3, followed by the moving main contact 4 contacting the stationary main contact 2. After the moving main contact 4 contacts the stationary main contact 2, the contact support 8 continues to rotate and compresses the contact spring 82, while simultaneously causing the moving arc contact 5 to rotate and separate from the stationary arc contact 3. Figure 1-4 As shown, the closing process is as follows:

[0065] like Figure 1-2 As shown, Figure 1 The circuit is shown in the open state, with the moving contact assembly and the stationary contact assembly fully open. When closing begins, the contact support 8, driven by the operating mechanism 12, begins to move towards... Figure 2 When the position is rotated, the moving main contact 4 rotates counterclockwise with the contact support 8 and approaches the stationary main contact 2. At the same time, the stationary arc contact 3 is driven to rotate clockwise and approach the moving arc contact 5 through the linkage rod 6.

[0066] like Figure 3As shown, at the instant the moving arc contact 5 contacts the stationary arc contact 3, the moving main contact 4 and the stationary main contact 2 have not yet contacted each other. The extension line of the axis of the linkage rod 6 passes through the axis of the contact support 8. By keeping the linkage rod 6 in a stationary state, the stationary arc contact 3 is constrained, preventing the stationary arc contact 3 from retracting, so that the stationary arc contact 3 and the moving arc contact 5 remain in contact.

[0067] like Figure 4 As shown, the contact support 8 continues to rotate counterclockwise. The contact position between the moving arc contact 5 and the stationary arc contact 3 serves as the temporary rotation center of the moving main contact 4. The contact support 8 drives the moving main contact 4 to swing clockwise through the moving mounting shaft 81, causing the linkage rod 6 to pass the dead point position until the moving main contact 4 contacts the stationary main contact 2.

[0068] After the moving main contact 4 contacts the stationary main contact 2, the contact position between the moving main contact 4 and the stationary main contact 2 serves as the temporary rotation center of the moving main contact 4. The contact support 8 continues to rotate and drives the moving main contact 4 to continue to rotate clockwise through the moving mounting shaft 81. The moving main contact 4 continues to rotate and causes the moving arc contact 5 to separate from the stationary arc contact 3. At the same time, the linkage rod 6 drives the stationary arc contact 3 to rotate away from the moving arc contact 5.

[0069] During opening, when the moving contact assembly rotates away from the stationary contact assembly, the contact support 8 moves in the opposite direction, causing the moving arc contact 5 to first contact the stationary arc contact 3. Then, the main contact 4 separates from the stationary main contact 2, and finally, the stationary arc contact 3 separates from the moving arc contact 5. For example... Figure 1-4 As shown, the tripping process is as follows:

[0070] like Figure 4 As shown in the diagram, the circuit is in the closed state. The stationary arc contact 3 and the moving arc contact 5 are separated. The moving main contact 4 is pressed against the stationary main contact 2 by the contact spring 82. When the circuit begins to open, the contact support 8 starts to rotate clockwise. The contact position between the moving main contact 4 and the stationary main contact 2 serves as the temporary rotation center of the moving main contact 4. The contact support 8 drives the moving main contact 4 to rotate counterclockwise through the moving mounting shaft 81 until the moving arc contact 5 contacts the stationary arc contact 3. Then, the contact position between the moving arc contact 5 and the stationary arc contact 3 serves as the temporary rotation center of the moving main contact 4. The contact support 8 continues to rotate and drives the moving main contact 4 to rotate through the moving mounting shaft 81. Figure 3 Positioning the moving main contact 4 separates it from the stationary main contact 2, at which point the current flows only between the moving arc contact 5 and the stationary arc contact 3.

[0071] like Figure 2As shown, the moving arc contact 5 continues to rotate clockwise with the contact support 8. The contact spring 82 extends and pushes the moving arc contact 5 to press against the stationary arc contact 3. When the contact spring 82 returns to its initial length, that is, when the contact spring 82 pushes the moving main contact 4 to press against the contact support 8, the moving arc contact 5 begins to rotate clockwise with the contact support 8 and moves away from the stationary arc contact 3. At the same time, the linkage rod 6 drives the stationary arc contact 3 to rotate counterclockwise and move away from the moving arc contact 5. Finally, the moving contact assembly and the stationary contact assembly move to... Figure 1 The fully open position is shown.

[0072] like Figure 5-6 As shown, the stationary arc contact 3 of this embodiment includes a rotating part 31 rotatably disposed on the stationary main contact 2, and a swinging part 33 and a linkage part 32 disposed opposite to each other on both sides of the rotating part 31. The rotating part 31 is provided with a stationary mounting hole 313, which is rotatably connected to the stationary main contact 2 through a stationary mounting shaft 314. The linkage part 32 is provided with a first linkage hole 311, which is rotatably connected to a linkage rod 6 through a first linkage shaft 312. The linkage part 32 is rotatably connected to the linkage rod 6. The swinging part 33 is provided with a stationary arc contact part 30 corresponding to the moving arc contact 5. Under the drive of the linkage rod 6, the swinging part 33 drives the stationary arc contact part 30 to move closer to or away from the moving arc contact 5.

[0073] Furthermore, the stationary main contact 2 includes a support plate 21, which is disposed between the stationary arc contact 3 and the movement space 7. The top of the support plate 21 is provided with a stationary main contact portion 211 that cooperates with the moving main contact portion of the moving main contact 4. The length of the stationary main contact portion 211 is parallel to the arrangement direction of the plurality of moving main contacts 4 in the opposite direction. The middle of the support plate 21 is provided with a first clearance groove 212, through which the stationary arc contact 3 passes and is rotatably connected to the linkage rod 6. The support plate 21 not only provides stable contact for the moving main contact 4, but also isolates the movement space 7 from the arc contact, forcing the arc to move toward the arc extinguishing system 11.

[0074] Specifically, the stationary main contact 2 further includes a mounting plate 22 connected to the support plate 21. One end of the mounting plate 22, away from the support plate 21, extends below the arc-extinguishing system 11 and is connected to the circuit via a stationary terminal (not shown in the figure). The mounting plate 22 has a mounting platform 23 located at the connection between the mounting plate 22 and the support plate 21, and its height is lower than that of the support plate 21. The mounting plate 22, mounting platform 23, and support plate 21 form a stepped integrated structure. The mounting platform 23 has a mounting groove 24 in the middle that communicates with the first clearance groove 212. A stationary mounting shaft 314 is provided in the mounting groove 24. The stationary mounting hole 313 of the stationary arc contact 3 is rotatably fitted onto the stationary mounting shaft 314 and is equipotentially connected to the support plate 21 via a flexible connection. Preferably, the mounting plate 22 is perpendicular to the support plate 21, and the mounting plate 22 has a second clearance groove 221 for avoiding the swinging part 33. By assembling a stepped structure, it not only features a compact structure and small size, but also allows the stationary arc contact 3 to be assembled with the stationary main contact 2 as a single module, which is then installed together into the housing 1, reducing assembly steps. In other embodiments, the stationary arc contact 3 can also be rotatably disposed in the first clearance groove 212 without the mounting platform 23. In other embodiments, a boss can also be provided on the housing 1, and after the stationary main contact 2 is installed into the housing 1, the stationary arc contact 3 can be separately installed onto the corresponding boss on the housing 1.

[0075] Preferably, the middle part of the linkage rod 6 is bent away from the support plate 21 to avoid the top of the support plate 21 when the circuit is opened. Figure 1 ).

[0076] Preferably, the surfaces of the stationary arc contact portion 30 and the moving arc contact portion 50 that contact each other are planar, while the surfaces of the moving arc contact portion 50 and the stationary arc contact portion 30 that contact each other are curved. After the stationary arc contact portion 30 and the moving arc contact portion 50 have contacted each other, when the moving arc contact 5 continues to rotate, the stationary arc contact portion 30 and the moving arc contact portion 50 are in a sliding fit, and the change of the contact point is smoother, which helps to reduce friction.

[0077] like Figure 10 As shown, the end of the linkage rod 6 is provided with two spaced linkage bosses 61. The head end of the static arc contact 3 is inserted between the two linkage bosses 61. The head end of the static arc contact 3 is rotatably connected to the two linkage bosses 61 through the first linkage shaft 312.

[0078] The limiting member 9 has two spaced-apart extended protrusions 90 on its partition plate 92. The first end of the linkage rod 6 has a cylindrical linkage post 63. The linkage post 63 is inserted between the two extended protrusions 90 and is rotatably connected to the two extended protrusions 90 through the second linkage shaft 62 passing through the first end of the linkage rod 6.

[0079] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0080] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A disconnecting switch, comprising a housing (1) and a stationary contact assembly, a moving contact assembly, and an operating mechanism (12) respectively disposed within the housing (1), wherein the operating mechanism (12) drives the moving contact assembly to contact or separate from the stationary contact assembly to achieve closing or opening, characterized in that: The stationary contact assembly includes a fixed stationary main contact (2) and a rotatable stationary arc contact (3), wherein the stationary main contact (2) and the stationary arc contact (3) are connected at the same potential. The moving contact assembly includes a moving main contact (4) corresponding to the stationary main contact (2) and a moving arc contact (5) corresponding to the stationary arc contact (3), wherein the moving main contact (4) and the moving arc contact (5) are connected at the same potential. It also includes the drive mechanism; When the circuit breaker is opened, the moving main contact (4) first separates from the stationary main contact (2), so that the current is transferred between the moving arc contact (5) and the stationary arc contact (3). Then the moving arc contact (5) separates from the stationary arc contact (3), and when the moving arc contact (5) moves away from the stationary arc contact (3), the driving mechanism drives the stationary arc contact (3) to rotate away from the moving arc contact (5).

2. The disconnecting switch according to claim 1, characterized in that: The driving mechanism is a linkage rod (6), which connects the moving contact assembly and the stationary arc contact (3).

3. The disconnecting switch according to claim 2, characterized in that: The linkage rod (6) is rotatably connected to the stationary arc contact (3) and the moving contact assembly via the first linkage shaft (312) and the second linkage shaft (62) respectively. At the instant when the moving arc contact (5) and the stationary arc contact (3) come into contact during the closing process, the axis of the first linkage shaft (312), the axis of the second linkage shaft (62) and the rotation axis of the moving contact assembly are located in the same plane.

4. The disconnecting switch according to claim 2 or 3, characterized in that: The stationary contact assembly is located below the moving contact assembly and is spaced apart from the rotation axis of the moving contact assembly, forming a motion space (7) between the rotation axes of the stationary contact assembly and the moving contact assembly. The moving contact assembly is provided with an extension boss (90) extending downward into the motion space (7). The linkage rod (6) is rotatably connected to the stationary arc contact (3) and the moving contact assembly through the first linkage shaft (312) and the second linkage shaft (62) respectively. The extension boss (90) is rotatably connected to one end of the linkage rod (6) through the second linkage shaft (62), and the other end of the linkage rod (6) is rotatably connected to the stationary arc contact (3) through the first linkage shaft (312). When the moving contact assembly rotates towards the stationary contact assembly, the extension boss (90) drives the linkage rod (6) to rotate into the motion space (7), so that the axis of the second linkage shaft (62) moves to between the axis of the first linkage shaft (312) and the rotation axis of the moving contact assembly.

5. The disconnecting switch according to claim 1, characterized in that: The moving contact assembly includes a plurality of moving main contacts (4), each moving main contact (4) having a moving main contact portion that contacts the stationary main contact (2), and at least one moving main contact (4) extending in a direction away from the rotation axis of the moving contact assembly to form a moving arc contact (5), the moving arc contact (5) having a moving arc contact portion (50) that contacts the stationary arc contact (3).

6. The disconnecting switch according to claim 2, characterized in that: The stationary arc contact (3) includes a rotating part (31) rotatably disposed on the stationary main contact (2), and a swinging part (33) and a linkage part (32) disposed opposite to each other on both sides of the rotating part (31). The rotating part (31) is provided with a stationary mounting hole (313), which is rotatably connected to the stationary main contact (2) through a stationary mounting shaft (314). The linkage part (32) is provided with a first linkage hole (311), which is rotatably connected to the linkage rod (6) through a first linkage shaft (312). The swinging part (33) is provided with a stationary arc contact part (30) corresponding to the moving arc contact (5).

7. The disconnecting switch according to claim 6, characterized in that: The stationary main contact (2) includes a support plate (21). The top of the support plate (21) is provided with a stationary main contact part (211) that cooperates with the moving main contact (4). The middle part of the support plate (21) is provided with a first clearance groove (212). The stationary arc contact (3) passes through the first clearance groove (212) and is rotatably connected to the linkage rod (6).

8. The disconnecting switch according to claim 7, characterized in that: The stationary main contact (2) also includes a mounting plate (22) connected to the support plate (21). The mounting plate (22) is provided with a mounting platform (23). The mounting platform (23) is located at the connection between the mounting plate (22) and the support plate (21). The mounting plate (22), the mounting platform (23) and the support plate (21) are an integral structure. The mounting platform (23) is provided with a mounting groove (24) in the middle that communicates with the first clearance groove (212). The mounting groove (24) is provided with a stationary mounting shaft (314). The stationary arc contact (3) is rotatably sleeved on the stationary mounting shaft (314) and is equipotentially connected to the support plate (21). The mounting plate (22) is provided with a second clearance groove (221) for avoiding the swing part (33).

9. The disconnecting switch according to claim 4, characterized in that: The moving contact assembly includes a contact support (8), a limiting member (9), and multiple moving main contacts (4). The contact support (8) is rotatably connected to the housing (1) via a support shaft (80). The axis of the support shaft (80) serves as the rotation axis of the moving contact assembly. A moving mounting shaft (81) is provided on the contact support (8). Multiple moving main contacts (4) are rotatably mounted on the mounting shaft (81) and arranged at intervals along the axial direction of the moving mounting shaft (81). The moving main contacts (4) and the contact support... A contact spring (82) is provided between the holders (8). The limiting member (9) includes a clamp (91) that matches the number of gaps between the moving main contacts (4) and a partition (92) that connects the ends of multiple clamps (91). The clamps (91) are embedded in the gaps between adjacent moving main contacts (4). The partition (92) is located on the radial side of the contact support (8) and is provided with an extension boss (90). The end of the extension boss (90) is rotatably connected to the linkage rod (6).

10. The disconnecting switch according to claim 5, characterized in that: When the moving contact assembly rotates toward the stationary contact assembly to perform a closing operation, the contact support (8) causes the moving arc contact (5) to contact the stationary arc contact (3) first, and then the moving main contact (4) contacts the stationary main contact (2); after the moving main contact (4) contacts the stationary main contact (2), the contact support (8) continues to rotate, causing the moving arc contact (5) to rotate and separate from the stationary arc contact (3); When the moving contact assembly rotates away from the stationary contact assembly to perform the opening operation, the contact support (8) drives the moving arc contact (5) to contact the stationary arc contact (3) first, then the moving main contact (4) separates from the stationary main contact (2), and then the stationary arc contact (3) separates from the moving arc contact (5).

Images