A high-voltage dual-power fast switching switch cabinet

Abstract

The present invention provides a high-voltage dual-power rapid switching switch cabinet. The dual-power switching device includes a sealing assembly with a sliding seal disposed within a switching tube to form two spaces (a) for arc-extinguishing airflow to pass through; an arc-extinguishing assembly disposed on the switching tube to control the arc-extinguishing airflow through holes symmetrically formed in the middle of the tube body; a control assembly disposed on the switching tube to control the sliding of the sealing assembly within the switching tube; and a linkage assembly disposed on the sealing assembly and connected to a moving contact. When the control assembly controls the sealing assembly to slide from one end to the other within the switching tube, the two spaces (a) formed by the sealing assembly sequentially pass through the holes. After the arc-extinguishing airflow ejected from the arc-extinguishing assembly passes through the two spaces (a) at intervals, it sequentially extinguishes arcs generated by the moving contact being driven away from a connection contact and approaching another connection contact by the delayed linkage assembly. The present invention improves the efficiency of power switching in the switch cabinet and ensures the stability of power switching.

Description

Technical Field

[0001] The present invention relates to the technical field of dual power switching, in particular to a high-voltage dual power fast switching switch cabinet. Background Art

[0002] High-voltage dual-power fast-switching switchgear is an intelligent power distribution device designed specifically for high-voltage power grids. Its core function is to switch between the main power supply and the backup power supply through the dual-power switching switch when the main power fails, ensuring continuous power supply to critical loads.

[0003] Conventional dual-power transfer switches utilize monitoring circuits to monitor the voltage, frequency, phase, and other parameters of two power sources (the primary power source and the backup power source) in real time. Sensors or detection circuits acquire status information from these power sources to determine their normal operation. When the primary power source experiences a fault, such as undervoltage, overvoltage, phase loss, or abnormal frequency, the transfer switch's control circuitry makes a decision based on this information. Once the switching conditions are met, the control circuit issues a command to activate the actuator, switching the load from the primary power source to the backup power source. This switching operation is typically rapid to minimize impact on the load. After the switch is complete, the backup power source's status is continuously monitored. If the primary power source returns to normal, reverse switching may occur based on pre-set conditions, switching the load back to the primary power source.

[0004] When the main power supply experiences severe current fluctuations or serious anomalies, the normal power supply is switched to the backup power supply. The control structure drives the load moving contact to swing from the main power contact position to the backup power contact position, and the arc extinguishing gas is synchronously controlled to extinguish the arc between the moving contact and the main power contact and the backup power contact. However, when the arc extinguishing gas blowing time is delayed, the energy of the arc increases dramatically under high voltage environment, which will burn the contacts and even cause an explosion, causing devastating damage to the switchgear. Summary of the Invention

[0005] In response to the above technical problems, the present invention provides a high-voltage dual-power fast-switching switch cabinet, which improves the efficiency of power switching of the switch cabinet and ensures the stability of power switching.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-voltage dual-power fast switching switch cabinet, comprising a switch cabinet body and a dual-power switching device arranged in the cabinet body, the dual-power switching device comprising a switching tube arranged horizontally in the switch housing and located below two connecting contacts, a sealing component with a sliding seal arranged in the switching tube and forming two arc-extinguishing airflow passage spaces (a), an arc-extinguishing component arranged on the switching tube and controlling the arc-extinguishing airflow to pass through holes symmetrically opened in the middle of the tube body, a control component arranged on the switching tube and controlling the sealing component to slide in the switching tube, and a linkage component arranged on the sealing component and connected to the moving contact; in the process of the control component controlling the sealing component to slide from one end to the other end in the switching tube, the two spaces (a) formed by the sealing component pass through the holes in sequence, and the arc-extinguishing airflow ejected by the arc-extinguishing component passes through the two spaces (a) at intervals, and then extinguishes the arc generated by the moving contact being away from the connecting contact and approaching the other connecting contact under the delayed driving of the linkage component in sequence;

[0007] The linkage assembly includes a first linkage rod transversely arranged on one side of the switching tube and having two ends connected to the two ends of the sealing assembly respectively, a limiting post slidably arranged at the middle position of the first linkage rod along the length direction of the rod, and a swing rod sleeved on the limiting post through a limiting groove provided in the length direction of the rod, the swing rod having one end away from the limiting post rotatably arranged in the switch housing by a rotating rod, and the rotating rod is connected to the moving contact, and the limiting post moves on the first linkage rod body a distance greater than the thickness of the second sealing disk and less than the distance between the first sealing disk and the second sealing disk;

[0008] The sealing component slides in the switching tube (15), and drives the swing rod (13) to swing around the rotating rod (11) through the first linkage rod (16), thereby driving the moving contact (9) to contact different connection contacts (10) respectively;

[0009] The dual power switching device also includes a manual control component arranged on the switch housing for manually controlling the connection between the moving contact and the connecting contact. The moving contact is arranged in the switch housing through a rotating rod, and the rotating rod is controlled to rotate to drive the moving contact to connect with different connecting contacts respectively. The rotating rod is arranged below between the two connecting contacts, and the length direction of the rotating rod is arranged along the length direction of the vertical switching tube.

[0010] Preferably, the arc extinguishing assembly includes a guide block arranged on the upper through hole, and an arc extinguishing member for introducing high-pressure arc extinguishing gas into the lower through hole. A guide hole that penetrates the interior of the through hole is opened on the top of the guide block, and the guide hole controls the arc extinguishing airflow to spray toward the position between the moving contact and the connecting contact.

[0011] Preferably, the sealing assembly includes a first sealing disk passed through the switching tube, two second sealing disks symmetrically arranged in parallel with the first sealing disk in the switching tube, and a linkage assembly connecting the second sealing disk and the moving contact rod; the first sealing disk and the second sealing disk are connected by a fixed rod, and the first sealing disk and the second sealing disk are both sealed and slidably arranged in the switching tube, and a space (a) is formed between adjacent first sealing disks and second sealing disks.

[0012] Preferably, the control assembly includes two first electromagnets fixedly arranged at two end positions in the switching tube, and a second electromagnet arranged on the opposite ends of the two second sealing disks.

[0013] Preferably, the manual control assembly includes a connecting post fixedly provided on the end of the rotating rod and passing through the switch housing, a manual knob rotatably provided on the switch housing and adjacent to the connecting post, and a connecting piece provided on the connecting post and connectable to the manual knob.

[0014] Preferably, a card slot and a sliding sealing groove are correspondingly provided at the relative positions of the manual knob and the connecting column, and the connecting part includes a card block with a bottom sliding seal arranged in the sliding sealing groove, two third electromagnets arranged at relative positions of the card block and the bottom wall of the sliding sealing groove, and a limiting structure arranged on the connecting column and limiting the position of the card block in the sliding sealing groove, and the end of the card block matches the card slot.

[0015] Preferably, a connecting hole is provided on the side of the connecting column, and a control hole that passes through the connecting hole is provided on the bottom wall of the sliding sealing groove. The limiting structure includes a sealing block for sliding sealing arranged in the control hole, and an elastic structure arranged along the axial direction of the control hole and connecting the sealing block and the wall of the connecting hole at both ends. When the elastic structure is in a normally extended state, the sealing block is passed through the connecting hole.

[0016] Beneficial effects of the present invention: The present invention monitors the main power supply and backup power supply circuits through a detection circuit, and when the main power supply current fluctuates or is abnormal, the control component drives the sealing component to slide in the switching tube, and when the first space (a) is connected to the through hole, the arc-extinguishing airflow flows through the space (a) and is sprayed to the position between the moving contact and the connecting contact. At this time, the moving contact is away from the connecting contact under the action of the linkage component, and the arc is blown away from the contact and cooled by the sprayed arc-extinguishing gas, ensuring a stable disconnection between the moving contact and the connecting contact, and when the moving contact moves to a position between the two connecting contacts, the sealing component is sealed and fitted on the through hole again to prevent the arc-extinguishing gas from blowing in. When the moving contact moves toward the other connecting contact, the second space (a) is connected to the through hole, and the arc-extinguishing airflow flows through the space (a) again and is sprayed to the position between the moving contact and the connecting contact, extinguishing the arc generated by the moving contact and the connecting contact approaching each other, facilitating rapid switching of the switch cabinet power supply, improving the efficiency of power switching, and ensuring the stability of power switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a simplified structural diagram of the high-voltage dual-power fast-switching switch cabinet proposed in the present invention.

[0019] Figure 2 It is a structural schematic diagram of the dual power switching device of the present invention.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the dual power switching device of the present invention.

[0021] Figure 4 This is a structural diagram of the linkage assembly movement state during dual power switching of the present invention.

[0022] Figure 5 It is a schematic diagram of the cross-sectional internal structure of the sealing component and the control component of the present invention.

[0023] Figure 6 It is a schematic structural diagram of the sealing component of the present invention.

[0024] Figure 7 It is a schematic diagram of the cross-sectional structure of the hand control assembly of the present invention.

[0025] Figure 8 It is a structural schematic diagram of the present invention's clamping block in a sliding sealing groove.

[0026] In the figure: 1. Cabinet; 2. Dual power switching device; 3. Main power connector; 4. Backup power connector; 5. Load connector; 6. Manual-automatic switching switch; 7. Manual knob; 8. Moving contact rod; 9. Moving contact; 10. Connecting contact; 11. Rotating rod; 12. Connecting column; 13. Swinging rod; 14. Limiting slot; 15. Switching tube; 16. First linkage rod; 17. Limiting column; 18. Limiting ring; 19. Inlet block; 20. Guide block; 21. First electromagnet; 22. First sealing disk; 23. Second sealing disk; 24. Fixed rod; 25. Second linkage rod; 26. Card slot; 27. Sliding sealing slot; 28. Card block; 29. Control hole; 30. Connecting hole; 31. Sealing block; 32. Third electromagnet; 33. Telescopic rod; 34. Limiting spring; 35. Moving slot. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0028] In the prior art, a dual power switching switch device is installed in a switch cabinet, and the main control circuit board is installed in a shielding box to detect the current conditions of the main power supply and the backup power supply. When the main power supply current fluctuates or is abnormal, the control circuit board controls the load contact to rotate from the main power contact to the backup power contact, and synchronously controls the arc extinguishing gas to be blown between the load contact, the main power contact and the backup contact to extinguish the arc. However, when the control circuit board controls the arc extinguishing gas to extinguish the arc, an arc is generated in the process of the load contact moving away from the main power contact and approaching the backup contact. Under high voltage conditions, the arc generated between the contacts can reach a temperature of thousands of degrees Celsius, which can quickly burn the contact surface, reduce its conductivity and mechanical strength, and cause poor contact or failure, resulting in unstable power switching.

[0029] Example 1

[0030] A high voltage dual power supply fast switching switch cabinet, such as Figure 1-3 and Figure 5 As shown, it includes a switch cabinet body 1 and a dual power switching device 2 arranged in the cabinet body 1, the dual power switching device 2 includes a switching tube 15 arranged horizontally in the switch housing and located below two connecting contacts 10, a sealing component with a sliding seal arranged in the switching tube 15 and forming two arc extinguishing airflow passage spaces (a), an arc extinguishing component arranged on the switching tube 15 and controlling the arc extinguishing airflow to pass through holes symmetrically opened in the middle of the tube body, a control component arranged on the switching tube 15 and controlling the sealing component to slide in the switching tube 15, and a linkage component arranged on the sealing component and connected to the moving contact 9, the two connecting contacts 10 are respectively connected to the main power connector 3 and the backup power connector 4 arranged on the switch housing, the main power connector 3 and the backup power connector 4 are respectively connected to the main power supply and the backup power supply, the moving contact 9 is connected to the load connector 5, and the load connector 5 is connected to the load;

[0031] When the moving contact 9 contacts one of the connection contacts 10, the sealing component is located below the other connection contact 10 and at one end of the switching tube 15, and the sealing component is sealed and fitted on the opening of the through hole;

[0032] During the process of the control component controlling the sealing component to slide from one end to the other end in the switching tube 15, the two spaces (a) formed by the sealing component pass through the through hole in turn. After the arc extinguishing airflow ejected by the arc extinguishing component flows through the two spaces (a) at intervals, the arc generated by the moving contact 9 driven by the linkage component to move away from the connecting contact 10 and close to the other connecting contact 10 is extinguished in turn.

[0033] like Figure 3 As shown, the dual power switching device 2 also includes a moving contact rod 8 rotatably arranged in the switch housing, and a moving contact 9 is provided at the top of the moving contact rod 8 corresponding to the position of the two connecting contacts 10, and the bottom of the moving contact rod 8 is rotatably arranged in the switch housing. Under the transmission action of the linkage component, the moving contact rod 8 is driven to rotate around the rotating connection, and the two moving contacts 9 are controlled to connect to different connecting contacts 10 respectively, thereby realizing the switching of the main power supply and the backup power supply.

[0034] In Example 1, during the switching process, the moving contact 9 can move quickly and smoothly from one connection contact 10 to another connection contact 10 under the precise control of the control component, thereby ensuring the continuity and stability of the power supply. At the same time, since the switching process is rapid and smooth, the power user can maintain the production process flow before the power outage without being disrupted after regaining power, various high and low voltage motors, inverters and other equipment will not stop, and there is no risk of voltage shock to the power grid equipment, thus achieving disturbance-free switching. The arc extinguishing component and the sealing component in this technical solution are cleverly designed. When an arc is generated during the switching process of the moving contact 9, an arc extinguishing airflow can be quickly ejected to extinguish the arc. During the sliding process of the sealing component in the switching tube 15, two independent arc extinguishing airflows can be formed through the spaces (a), so that the arc extinguishing airflows can flow through the two spaces (a) at intervals, respectively extinguishing the arc generated in the process of the moving contact 9 leaving one of the connection contacts 10 and the process of the moving contact 9 approaching the other connection contact. On the one hand, the consumption of arc extinguishing gas is reduced, and on the other hand, the arc extinguishing efficiency is improved. The mechanical transmission design not only ensures that the arc generated in the process of controlling the moving contact 9 to approach or move away from the connection contact 10 is quickly and stably extinguished, reducing the risk of damage to the equipment caused by the arc, but also improves the safety of the entire switchgear.

[0035] The arc extinguishing gas used in Example 1 can be sulfur hexafluoride, nitrogen, carbon dioxide, etc. stored at high pressure. For example, when sulfur hexafluoride is used, when the high-pressure sulfur hexafluoride is blown between the moving contact 9 and the connecting contact 10, the fluorine atoms generated by decomposition at high temperature combine with the free electrons in the arc to form negative ions, thereby reducing the electron density in the arc and extinguishing the arc.

[0036] In this embodiment, Figure 3-5As shown, the arc extinguishing assembly includes a guide block 20 arranged on the upper through hole, and an arc extinguishing member for introducing high-pressure arc extinguishing gas into the lower through hole. A guide hole is opened on the top of the guide block 20 and is connected to the inside of the through hole. The guide hole controls the arc extinguishing gas flow to the position between the moving contact 9 and the connecting contact 10. The arc extinguishing member adopts a storage tank for storing high-pressure arc extinguishing gas. The output end of the storage tank is connected to the side of the switching tube 15 on the lower through hole through a pipeline, and is connected to the inside of the through hole through the air inlet block 19. When the main power current is in a stable state, the moving contact 9 contacts one of the connecting contacts 10. At this time, the storage tank is connected to the through hole located below through the pipeline and the air inlet block 19. At this time, the through hole located below is in a high-pressure state, and the sealing component that is sealed in the switching tube 15 and is fitted at the opening position of the through hole is fitted. A force perpendicular to the axial direction of the switching tube 15 is applied to the sealing component, which ensures that the sealing component is stably located in the switching tube 15, improves the stability of the arc extinguishing component when not in use, and the sealing component is connected to the moving contact 9 through the linkage component, which also ensures the stability of the fit between the moving contact 9 and the connecting contact 10.

[0037] In this embodiment, Figure 5-6 As shown, the sealing assembly includes a first sealing disk 22 passing through the switching tube 15, two second sealing disks 23 symmetrically arranged in parallel with the first sealing disk 22 in the switching tube 15, and a linkage assembly connecting the second sealing disk 23 and the moving contact rod 8; the first sealing disk 22 and the second sealing disk 23 are connected by a fixing rod 24, and the first sealing disk 22 and the second sealing disk 23 are both sealed and slidably arranged in the switching tube 15, and a space (a) is formed between adjacent first sealing disks 22 and second sealing disks 23. When the moving contact 9 is fitted with the connecting contact 10 connected to the main power supply, one of the side surfaces of the second sealing disk 23 is fitted on the inner wall of the switching tube 15, and under the action of the high-pressure arc-extinguishing gas in the storage tank connected to the air inlet block 19, the second sealing disk 23 is A force perpendicular to the axis of the switching tube 15 is applied to the side of the disk 23 to fix the position of the second sealing disk 23 in the switching tube 15, and also ensure the stability of the position between the moving contact 9 and the connecting contact 10 connected by the linkage assembly; when controlling the dual power switching, the control assembly drives the two second sealing disks 23 and the first sealing disk 22 to slide synchronously in the switching tube 15. During the sliding process of the two second sealing disks 23 and the first sealing disk 22 in the switching tube 15, the two spaces (a) pass through the through holes in turn. When the two spaces (a) pass through the through holes respectively, the high-pressure arc-extinguishing gas in the storage tank is sprayed from the through holes to the position between the moving contact 9 and the connecting contact 10, so as to extinguish the arc generated when the moving contact 9 and the connecting contact 10 approach or move away from each other.

[0038] In this embodiment, Figure 5As shown, the control component includes two first electromagnets 21 fixedly arranged at both end positions in the switching tube 15, and a second electromagnet arranged on the opposite ends of the two second sealing disks 23. When controlling the first sealing disk 22 and the two second sealing disks 23 to slide in the switching tube 15, the two adjacent groups of first electromagnets 21 and second electromagnets are controlled to have the same and opposite magnetic poles at one end. One group of adjacent first electromagnets 21 and second electromagnets have the same magnetic poles at one end, and the other group of adjacent first electromagnets 21 and second electromagnets have opposite magnetic poles at one end, and the magnetic force and suction force between the electromagnets drive the first sealing disk 22 and the two second sealing disks 23 to slide rapidly.

[0039] The control component can also use an electric cylinder, the output end of the electric cylinder is set along the axis direction of the switching tube 15, and the output end is connected to one of the second sealing disks 23, and the first sealing disk 22 and the second sealing disk 23 are driven to slide in the switching tube 15 through the output end of the electric cylinder.

[0040] like Figure 3-6 As shown, in this embodiment, the linkage assembly includes a first linkage rod 16 which is transversely arranged on one side of the switching tube 15 and whose two ends are respectively connected to the two ends of the sealing assembly, a limiting column 17 which is slidingly arranged at the middle position of the rod body of the first linkage rod 16 along the length direction of the rod body, and a swing rod 13 which is sleeved on the limiting column 17 through a limiting groove 14 in the length direction of the rod body. The end of the swing rod 13 away from the limiting column 17 is rotatably arranged in the switch housing through a rotating rod 11, and the rotating rod 11 is connected to the moving contact 9, and the rotating rod 11 is parallel to the moving contact rod 8. The moving distance of the limiting column 17 on the rod body of the first linkage rod 16 is greater than the thickness of the second sealing disk 23 and less than the distance between the first sealing disk 22 and the second sealing disk 23. A moving groove 35 is opened in the middle part of the rod body of the first linkage rod 16 along the length direction, and the opening length of the moving groove 35 is equal to the thickness of the second sealing disk 23 and less than the distance between the first sealing disk 22 and the second sealing disk 23. The limiting column 17 is slidably arranged in the moving groove 35. Figure 4 A in Figure 4 B in and Figure 4C in the figure shows in sequence the state where the moving contact 9 is fitted with the connecting contact 10 connected to the main power supply, the state where the moving contact 9 is located between the two connecting contacts 10, and the state where the moving contact 9 is fitted with the connecting contact 10 connected to the backup power supply. When the control component drives the two second sealing disks 23 and the first sealing disk 22 to slide in the switching tube 15, a second linkage rod 25 connected to the first linkage rod 16 is vertically provided on the end face of the second sealing disk 23. The first linkage rod 16 moves, and the movable groove 35 is slidably sleeved on the limiting column 17. At this time, only the second sealing disk 23 is driven to move. When the groove wall on one side of the movable groove 35 presses against the limiting column 17, the first second sealing disk 23 passes through the through hole, and the through hole is connected to the inside of the first space (a). The high-pressure arc-extinguishing gas flows through the through hole and the space (a), and is sprayed to the position of the moving contact 9 and the connecting contact 10 through the guide hole opened on the guide block 20. When the first linkage rod 16 continues to move, the moving groove on the first linkage rod 16 The groove wall of the groove 35 presses against the limit column 17 and drives the limit column 17 to move below the other connecting contact 10. The limit column 17 is sleeved on the limit groove 14, driving the swing rod 13 to rotate around the rotating rod 11. At this time, the moving contact 9 set on the moving contact rod 8 leaves the connecting contact 10, and arc extinguishing gas flows at high speed between the moving contact 9 and the connecting contact 10, which is convenient for extinguishing the arc between the moving contact 9 and the connecting contact 10. Similarly, when the moving contact 9 moves to the position between the two connecting contacts 10, the first sealing disk 22 presses against the through hole position, cutting off the arc extinguishing airflow. When the second space (a) moves to the through hole position, the high-pressure arc extinguishing airflow is again sprayed to the position of the moving contact 9 and the connecting contact 10 through the guide block, extinguishing the arc generated when the moving contact 9 approaches the connecting contact 10, until the moving contact 9 is in contact with the connecting contact 10, the side of the second sealing disk 23 is in contact with the through hole opening, ensuring fast and stable switching between the dual power supplies.

[0041] like Figure 3 As shown, a limit ring 18 is fixedly provided on the side of the switching tube 15, and the limit ring 18 is movably sleeved on the rod body of the first linkage rod 16 to limit the first linkage rod 16 to move only in the length direction.

[0042] Example 2

[0043] like Figure 2-3 As shown, the dual power switching device 2 also includes a manual control component arranged on the switch housing for manually controlling the connection between the moving contact 9 and the connecting contact 10, and a manual-automatic switching switch 6 connected to the manual control component. The moving contact 9 is arranged in the switch housing through a rotating rod 11, and the rotating rod 11 is controlled to rotate to drive the moving contact 9 to connect with different connecting contacts 10 respectively. The rotating rod 11 is arranged below between the two connecting contacts 10, and the length direction of the rotating rod 11 is arranged along the length direction of the vertical switching tube 15. The manual control component facilitates the control of the moving contact 9 to rotate to realize dual power switching.

[0044] The manual control assembly includes a connecting column 12 fixedly arranged on the end of the rotating rod 11 and passing through the switch housing, a manual knob 7 rotatably arranged on the switch housing and adjacent to the connecting column 12, and a connecting piece arranged on the connecting column 12 and connectable to the manual knob 7.

[0045] A card slot 26 and a sliding sealing groove 27 are correspondingly provided at the relative positions of the manual knob 7 and the connecting column 12. The connecting part includes a card block 28 with a bottom sliding seal arranged in the sliding sealing groove 27, two third electromagnets arranged at relative positions between the card block 28 and the bottom wall of the sliding sealing groove 27, and a limiting structure arranged on the connecting column 12 and limiting the position of the card block 28 in the sliding sealing groove 27. The end of the card block 28 matches the card slot 26.

[0046] A connecting hole 30 is provided on the side of the connecting column 12, and a control hole 29 which passes through the connecting hole 30 is provided on the bottom wall of the sliding sealing groove 27. The limiting structure includes a sealing block 31 which is slidingly sealed and arranged in the control hole 29, and an elastic structure which is arranged along the axial direction of the control hole 29 and has its two ends respectively connected to the sealing block 31 and the wall of the connecting hole 30. When the elastic structure is in a normally extended state, the sealing block 31 is passed through the connecting hole 30. The elastic structure includes a telescopic rod 33 which is arranged along the axial direction of the control hole 29 and has its two ends respectively connected to the sealing block 31 and the wall of the connecting hole 30, and a limiting spring 34 which is sleeved on the rod body of the telescopic rod 33.

[0047] In Example 2, Figure 2 、 Figure 3 、 Figure 7 and Figure 8 As shown, Figure 8 A in Figure 8 B in and Figure 8In the figure C, the block 28 is located in the sliding sealing groove 27, the block 28 is extended out of the sliding sealing groove 27, and the end of the block 28 is controlled to move into the sliding sealing groove 27. When manual dual power switching is required, the manual-automatic switching switch 6 is used to control the magnetic poles of the two third electromagnets 32 at the opposite ends to be the same or opposite. When the relative magnetic poles of the two third electromagnets 32 are the same, the repulsive force of the two third electromagnets 32 pushes the block 28 to slide from the sliding sealing groove 27 to the card slot 26, thereby realizing the connection between the manual knob 7 and the connecting column 12. During the movement of the block 28, the sliding sealing groove 27 and the block 28 are connected. In a negative pressure state, the air pushes the sliding sealing block 31 to move in the sliding sealing groove 27 through the connecting hole 30 and the control hole 29. At this time, the air enters the sliding sealing groove 27, and after the card block 28 is inserted into the card slot 26, the limit spring 34 is in a stretched state. At this time, the sealing block 31 is pulled to move into the control hole 29 again under the tension of the limit spring 34. At this time, the air in the sliding sealing groove 27 is in a relatively closed space. Under the action of atmospheric pressure, the stability of the card block 28 in the card slot 26 is guaranteed. The two third electromagnets 32 are controlled to work by the manual-automatic switching switch 6 to control the connection between the manual knob 7 and the connecting column 12.

[0048] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage dual-power fast switching switch cabinet, comprising a switch cabinet body (1), and a dual-power switching device (2) arranged in the cabinet body (1), characterized in that: The dual power switching device (2) comprises a switching tube (15) arranged transversely in a switch housing and located below two connecting contacts (10), a sealing component with a sliding seal arranged in the switching tube (15) and forming two arc-extinguishing airflow passage spaces (a), an arc-extinguishing component arranged on the switching tube (15) and controlling the arc-extinguishing airflow to pass through holes symmetrically provided in the middle of the tube body, a control component arranged on the switching tube (15) and controlling the sealing component to slide in the switching tube (15), and a linkage component arranged on the sealing component and connected to the moving contact (9); During the process of the control component controlling the sealing component to slide from one end to the other end in the switching tube (15), the two spaces (a) formed by the sealing component sequentially pass through the through hole, and after the arc extinguishing airflow ejected by the arc extinguishing component flows through the first space (a), the linkage component drives the moving contact (9) away from the connection contact, and sequentially extinguishes the arc generated by the moving contact (9) being away from the connection contact (10) and approaching the other connection contact (10) under the delayed driving of the linkage component; The linkage assembly comprises a first linkage rod (16) which is transversely arranged on one side of the switching tube (15) and whose two ends are respectively connected to the two ends of the sealing assembly, a limiting column (17) which is slidably arranged on the middle position of the rod body of the first linkage rod (16) along the length direction of the rod body, and a swing rod (13) which is sleeved on the limiting column (17) by a limiting groove (14) provided in the length direction of the rod body, the swing rod (13) is rotatably arranged in the switch housing through a rotating rod (11) at one end away from the limiting column (17), and the rotating rod (11) is connected to the moving contact (9), and the moving distance of the limiting column (17) on the rod body of the first linkage rod (16) is greater than the thickness of the second sealing disk (23) and less than the distance between the first sealing disk (22) and the second sealing disk (23); The sealing component slides in the switching tube (15), and drives the swing rod (13) to swing around the rotating rod (11) through the first linkage rod (16), thereby driving the moving contact (9) to contact different connection contacts (10) respectively; The dual power switching device (2) further includes a hand-controlled assembly arranged on the switch housing for manually controlling the connection between the moving contact (9) and the connecting contact (10); the moving contact (9) is arranged in the switch housing via a rotating rod (11), and the rotating rod (11) is controlled to rotate to drive the moving contact (9) to connect with different connecting contacts (10), respectively; the rotating rod (11) is arranged below between the two connecting contacts (10), and the length direction of the rotating rod (11) is arranged along the length direction of the vertical switching tube (15).

2. The high-voltage dual-power fast-switching switch cabinet according to claim 1, characterized in that: The arc extinguishing assembly comprises a guide block (20) arranged on the upper through hole, and an arc extinguishing member for introducing high-pressure arc extinguishing gas into the lower through hole. A guide hole is provided on the top of the guide block (20) and is communicated with the interior of the through hole. The guide hole controls the arc extinguishing gas flow to be sprayed toward the position between the moving contact (9) and the connecting contact (10).

3. The high-voltage dual-power fast-switching switch cabinet according to claim 1, characterized in that: The sealing assembly comprises a first sealing disc (22) passing through the switching tube (15), two second sealing discs (23) symmetrically arranged in parallel with the first sealing disc (22) and arranged in the switching tube (15), and a linkage assembly connecting the second sealing disc (23) and the moving contact rod (8); the first sealing disc (22) and the second sealing disc (23) are connected by a fixing rod (24), and the first sealing disc (22) and the second sealing disc (23) are both sealed and slidably arranged in the switching tube (15), and a space (a) is formed between adjacent first sealing discs (22) and second sealing discs (23).

4. The high-voltage dual-power fast-switching switch cabinet according to claim 3, characterized in that: The control component comprises two first electromagnets (21) fixedly arranged at two end positions in the switching tube (15), and a second electromagnet arranged on opposite ends of the two second sealing disks (23).

5. The high-voltage dual-power fast-switching switch cabinet according to claim 1, characterized in that: The manual control assembly comprises a connecting column (12) fixedly arranged on the end of a rotating rod (11) and penetrating the switch housing, a manual knob (7) rotatably arranged on the switch housing and adjacent to the connecting column (12), and a connecting piece arranged on the connecting column (12) and connectable to the manual knob (7).

6. The high-voltage dual-power fast-switching switch cabinet according to claim 5, characterized in that: A card slot (26) and a sliding seal slot (27) are correspondingly provided at relative positions of the manual knob (7) and the connecting column (12). The connecting member includes a card block (28) with a bottom sliding seal arranged in the sliding seal slot (27), two third electromagnets arranged at relative positions of the card block (28) and the bottom wall of the sliding seal slot (27), and a limiting structure arranged on the connecting column (12) and limiting the position of the card block (28) in the sliding seal slot (27). The end of the card block (28) matches the card slot (26).

7. The high-voltage dual-power fast-switching switch cabinet according to claim 6, characterized in that: A connecting hole (30) is provided on the side of the connecting column (12), and a control hole (29) is provided on the bottom wall of the sliding sealing groove (27) and is communicated with the connecting hole (30). The limiting structure includes a sealing block (31) provided in the control hole (29) for sliding sealing, and an elastic structure provided along the axial direction of the control hole (29) and having two ends respectively connected to the sealing block (31) and the hole wall of the connecting hole (30). When the elastic structure is in a normally extended state, the sealing block (31) is provided in the connecting hole (30).

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