Dual power automatic transfer switch

Abstract

The application discloses a kind of dual power automatic transfer switches in the field of electric power equipment, including base, first standby power and second standby power are symmetrically equipped on base, first standby power and second standby power are respectively equipped with first static contact and second static contact, power switching assembly is equipped between first standby power and second standby power;First static contact and second static contact top are equipped with arc extinguishing component, and arc extinguishing component includes telescopic placement slot, a plurality of arc extinguishing grating are equipped in telescopic placement slot, two groups of magnetic conductive sheets are slidably connected in the bottom of telescopic placement slot, magnetic conductive sheet and telescopic arc guide plate are equipped between telescopic placement slot, magnetic conductive sheet and telescopic arc guide plate form arc pulling space, permanent magnet is placed on magnetic conductive sheet, and magnetic conductive sheet and permanent magnet form traction electric field, and traction electric field can pull arc to arc extinguishing space.This scheme is by arc pulling space to lengthen dispersion, then by arc extinguishing grating, it is divided, reduce the damage of arc to contact.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and more specifically to a dual-power automatic transfer switch. Background Technology

[0002] Automatic transfer switches (ATSEs) are used to switch between two power sources to ensure continuous power supply to critical loads. Traditionally, ATSEs include two-position and three-position versions. A two-position ATSE means that the moving contact can only switch between the stationary contacts of the first and second power sources. A three-position ATSE means that the moving contact can not only remain on the stationary contacts of the first and second power sources, but also remain in a double-open position where it is not in contact with the stationary contacts of either power source.

[0003] Patent CN110970240B discloses a control circuit and a dual-power automatic transfer switch. The dual-power automatic transfer switch includes a first electromagnet controlling a first power source and a second electromagnet controlling a second power source. The control circuit includes: the first electromagnet connected in series with a first micro switch and a first rotary switch connected in parallel, forming a first branch circuit; the first micro switch controls the on / off state of the first electromagnet. The second electromagnet is connected in series with a second micro switch and a second rotary switch connected in parallel, forming a second branch circuit; the second micro switch controls the on / off state of the second electromagnet. The first and second branch circuits are connected in parallel. A dual-power automatic transfer switch includes the control circuit described above.

[0004] This patent simplifies the control circuit of a three-position dual-power switch by improving the structure and enhances the versatility of the controller. However, for high-voltage equipment, such as 35kV substations, the use of existing dual-power automatic transfer switches can easily generate high-intensity electric arcs, posing a safety risk to the equipment. Therefore, we propose a dual-power automatic transfer switch. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-power automatic transfer switch to address the aforementioned shortcomings in the technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The purpose of the present invention is to provide a dual-power automatic transfer switch, which, through a variable arc-trapping space, elongates and disperses the electric arc generated when the power is switched on and off, and pulls it to the arc-extinguishing space for elimination, thereby solving the problem that high-voltage equipment is prone to generating high-intensity electric arcs when using existing dual-power automatic transfer switches, which poses a safety risk to the equipment.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A dual-power automatic transfer switch includes a base, on which a first backup power supply and a second backup power supply are symmetrically arranged. The first backup power supply and the second backup power supply are respectively provided with a first stationary contact and a second stationary contact. A power switching component is provided between the first backup power supply and the second backup power supply. This dual-power automatic transfer switch has dual backup power supplies and can automatically switch to the backup power supply when one power supply fails, ensuring the continuity and stability of power supply. Simultaneously, the design of the power switching component makes the switching process fast and stable, reducing the impact on electrical equipment and improving the reliability and safety of the equipment.

[0008] The power switching assembly includes a rotating bracket movably connected to a base. A movable contact is fixedly connected to one end of the rotating bracket, allowing it to move between a first stationary contact, a second stationary contact, and a double-position. A rotary switch is located at the end of the rotating bracket furthest from the movable contact. A first control circuit and a second control circuit are connected in series and in parallel between the rotary switch and the rotating bracket. This assembly enables switching between the first stationary contact, the second stationary contact, and the double-position, meeting the switching needs of different power sources. The movable connection between the rotating bracket and the base makes switching more flexible and convenient. The movable contact on the rotating bracket ensures more accurate and reliable switching. The parallel first and second control circuits guarantee safety and stability during the switching process. The design is simple, easy to manufacture and maintain, and inexpensive.

[0009] Arc-extinguishing components are provided above both the first and second stationary contacts. Each arc-extinguishing component includes a retractable placement groove containing several arc-extinguishing grids. The sidewall of the retractable placement groove is slidably connected to the base. Two sets of magnetic conductive sheets are slidably connected to the bottom of the retractable placement groove. The magnetic conductive sheets are placed parallel to the surface of the base and fixedly connected to the base. A retractable arc-inducing plate is provided between the side of the magnetic conductive sheet away from the moving contact and the retractable placement groove. The magnetic conductive sheets and the retractable arc-inducing plate form an arc-drawing space. A permanent magnet is placed on the magnetic conductive sheet along a direction perpendicular to the magnetic conductive sheet. The magnetic conductive sheet and the permanent magnet form a traction electric field, which can draw the arc to the arc-extinguishing space.

[0010] The principle behind this solution:

[0011] By rotating the switch to control the connection between the first control circuit and the second control circuit, the connection between the first backup power supply and the second backup power supply is controlled. When the power supply is closed or opened, an electric arc is generated. The magnetic sheet and the permanent magnet form a traction electric field, which pulls the electric arc to the arc extinguishing space. By changing the length and density of the electric arc through the arc extinguishing space, the electric arc is lengthened and dispersed and then divided by the arc extinguishing grid, thereby reducing the damage of the electric arc to the contacts.

[0012] The above solution achieved the following beneficial effects:

[0013] Compared to existing technologies, this solution uses a magnetic sheet and a permanent magnet to create a traction electric field, which pulls the arc to the arc-extinguishing space. By changing the length and density of the arc through the traction space, the arc is lengthened and dispersed before being divided by the arc-extinguishing grid, reducing the damage of the arc to the contacts and thus lowering the safety risk of the equipment. Furthermore, the variable traction space can meet the arc-pulling and arc-extinguishing requirements under arcs of different intensities, avoiding the safety risk of high voltage damaging the equipment when the arc is small but the traction space is too large, making it difficult for the traction electric field to pull the arc to the arc-extinguishing space for arc extinguishing, or when the arc is large but the traction space is small.

[0014] Furthermore, the telescopic placement slot includes an integrally formed fixed part and a telescopic part. The movable end of the telescopic part is connected to an electric actuator. The end of the electric actuator away from the telescopic part is fixedly connected to the base. A pressure sensor for testing the magnitude of the arc voltage is provided in the arc-drawing space. The displacement change of the electric actuator is positively correlated with the magnitude of the arc voltage.

[0015] Beneficial effects: By changing the size of the arc-drawing space by the magnitude of the arc voltage, the arc entering the arc-drawing space can be elongated and dispersed, avoiding damage to the equipment by the arc. When the arc is small but the arc-drawing space is too large, the traction electric field is unable to draw the arc to the arc-extinguishing space for arc extinguishing. When the arc is large but the arc-drawing space is small, there is a safety risk of the voltage being too high and damaging the equipment.

[0016] Furthermore, the telescopic parts of both the telescopic arc-starting plate and the telescopic placement groove are made of insulating elastic material.

[0017] Beneficial effects: The retractable arc-starting plate and retractable placement groove made of insulating elastic material can not only meet the needs of arc-starting spaces of different sizes, but also isolate arc leakage and improve the safety of the equipment.

[0018] Furthermore, the first control circuit includes a first circuit switch and a first electromagnet connected in series. The output end of the first electromagnet is connected to a first traction rod. The end of the first traction rod away from the first electromagnet is connected to a rotating bracket. When the first control circuit is connected, the first electromagnet can drive the first traction rod and the moving contact to close with the first stationary contact.

[0019] Beneficial effects: By controlling whether the first control circuit is connected or not, the moving contact and the first stationary contact are closed. Compared with the existing technology where the three-position ASTE is driven by three electromagnet coils, this solution simplifies the drive mechanism while ensuring operational reliability, making it easier for users to operate.

[0020] Furthermore, the second control circuit includes a second circuit switch and a second electromagnet connected in series. The output end of the second electromagnet is connected to a second traction rod. The end of the second traction rod away from the second electromagnet is connected to a rotating bracket. When the second control circuit is connected, the second electromagnet can drive the second traction rod and the moving contact to close with the second stationary contact.

[0021] Beneficial effects: By controlling whether the second control circuit is connected or not, the moving contact and the second stationary contact are closed. Compared with the existing technology where the three-position ASTE is driven by three electromagnet coils, this solution simplifies the drive mechanism while ensuring operational reliability, making it easier for users to operate.

[0022] Furthermore, a first elastic element and a second elastic element are fixedly connected to the base. The end of the first elastic element away from the base is fixedly connected to the first traction rod, and the end of the second elastic element away from the base is fixedly connected to the second traction rod.

[0023] Beneficial effects: When the first circuit switch is closed, the first control circuit is connected. The first electromagnet drives the moving contact to close with the first stationary contact. The first elastic element is compressed, and the second elastic element is stretched. Under the balance of the elastic forces of the first and second elastic elements, the moving contact is locked to the first stationary contact, which improves the stability of the device. The same principle applies when the second circuit switch is closed. When both the first and second circuit switches are open, the device still remains stable under the balance of the elastic forces of the first and second elastic elements. Compared with the existing technology that uses multiple electromagnets for control, this solution simplifies the structure and ensures stability.

[0024] Furthermore, a limiting arc-starting plate is provided between the arc-extinguishing assembly of the first stationary contact and the arc-extinguishing assembly of the second stationary contact.

[0025] Beneficial effect: The limiting arc-starting plate can make the electric arc move within the arc-starting space, preventing arc leakage.

[0026] Furthermore, the dual-power automatic transfer switch also includes an insulating cover that can cover the power switching components.

[0027] Beneficial effects: The insulating cover covers the power switching components, preventing arc leakage during power switching and improving operator safety. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0029] Figure 1 This is an isometric view of the dual-power automatic transfer switch according to an embodiment of the present invention.

[0030] Figure 2 This is a front view of a dual-power automatic transfer switch according to an embodiment of the present invention.

[0031] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0032] Figure 4 This is a cross-sectional view of the rotary switch of the dual-power automatic transfer switch according to an embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Base, 2. Second backup power supply, 3. Insulating cover, 4. First backup power supply, 5. Rotary switch, 6. Magnetic sheet, 7. Telescopic arc-inducing plate, 8. Electric push rod, 9. Telescopic placement slot, 10. Arc-extinguishing grid, 11. First stationary contact, 12. Second stationary contact, 13. Rotary bracket, 14. Moving contact, 15. Limiting arc-inducing plate, 16. Second circuit switch, 17. First circuit switch, 18. First electromagnet, 19. First traction rod, 20. First elastic element, 21. Second electromagnet, 22. Second traction rod, 23. Second elastic element. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. Example 1

[0036] The basic implementation examples are as follows: Figure 1 , Figure 2 and Figure 3 As shown: A dual-power automatic transfer switch includes a base 1, on which a first backup power supply 4 and a second backup power supply 2 are symmetrically arranged. The first backup power supply 4 and the second backup power supply 2 are respectively provided with a first stationary contact 11 and a second stationary contact 12. A power switching component is provided between the first backup power supply 4 and the second backup power supply 2.

[0037] The power switching assembly includes a rotating bracket 13, which is movably connected to the base 1. One end of the rotating bracket 13 is fixedly connected to a moving contact 14, which can move between a first stationary contact 11, a second stationary contact 12, and a double-position. A rotary switch 5 is provided at the end of the rotating bracket 13 away from the moving contact 14. A first control circuit and a second control circuit are connected in parallel between the rotary switch 5 and the rotating bracket 13.

[0038] Arc-extinguishing components are provided above both the first stationary contact 11 and the second stationary contact 12. Each arc-extinguishing component includes a retractable placement groove 9, within which several arc-extinguishing grids 10 are installed. The sidewall of the retractable placement groove 9 is slidably connected to the base 1. Two sets of magnetic conductive sheets 6 are slidably connected to the bottom of the retractable placement groove 9. The magnetic conductive sheets 6 are placed parallel to the surface of the base 1 and fixedly connected to the base 1. A retractable arc-inducing plate 7 is provided between the side of the magnetic conductive sheet 6 away from the moving contact 14 and the retractable placement groove 9. The magnetic conductive sheet 6 and the retractable arc-inducing plate 7 form an arc-tracing space. A permanent magnet is placed on the magnetic conductive sheet 6 along a direction perpendicular to the magnetic conductive sheet 6. The magnetic conductive sheet 6 and the permanent magnet form a traction electric field, which can draw the arc to the arc-extinguishing space. This arc-extinguishing component can effectively extinguish arcs and prevent hazards caused by arcs. The design of the retractable placement groove and the arc-extinguishing grids can adapt to different arc sizes and shapes, improving arc-extinguishing efficiency. Meanwhile, the design of the retractable arc-initiating plate and magnetic sheet can create an arc-drawing space and a traction electric field, enabling the arc to be quickly drawn to the arc-extinguishing space, thus improving the arc-extinguishing speed and efficiency. This invention has advantages such as simple structure, high arc-extinguishing efficiency, and long service life, and is suitable for arc-extinguishing devices in high-voltage switches and other power equipment.

[0039] The specific implementation process is as follows:

[0040] In the initial state, the rotary switch 5, the rotary bracket 13, and the moving contact 14 are all in the double-open position and are not connected to the first stationary contact 11 or the second stationary contact 12. By rotating the switch 5, the first control circuit and the second control circuit are closed, thereby controlling the moving contact 14 to close with the first stationary contact 11 or the second stationary contact 12, so as to realize the opening and closing control of the power supply.

[0041] An electric arc is generated when the power supply is closed or opened. The magnetic sheet 6 and the permanent magnet form a traction electric field, which pulls the electric arc to the arc extinguishing space. The retractable placement slot 9 and the retractable arc-initiating plate 7 can change the size of the arc-pulling space. By changing the size of the arc-pulling space, the length and density of the electric arc can be controlled. The electric arc is stretched and dispersed and then divided by the arc extinguishing grid 10 to avoid damage to the equipment. When the electric arc is small but the arc-pulling space is too large, the traction electric field is not enough to pull the electric arc to the arc extinguishing space for arc extinguishing. When the electric arc is large but the arc-pulling space is small, there is a safety risk of high voltage damaging the equipment. Example 2

[0042] The difference from the above embodiments is that, as shown in the appendix... Figure 1 and Figure 2 As shown, the telescopic placement slot 9 includes an integrally formed fixed part and a telescopic part. The movable end of the telescopic part is connected to an electric push rod 8. The end of the electric push rod 8 away from the telescopic part is fixedly connected to the base 1. A pressure sensor for testing the magnitude of the arc voltage is provided in the arc-drawing space. The displacement change of the electric push rod is positively correlated with the magnitude of the arc voltage.

[0043] The specific implementation process is as follows:

[0044] Since the retractable arc-initiating plate 7 is connected with the magnetic sheet 6 and the retractable placement slot 9 to form an arc-drawing space, the size of the arc-drawing space can be changed when the electric push rod 8 changes the size of the retractable placement slot 9. According to the fact that the displacement change of the electric push rod 8 is positively correlated with the magnitude of the arc voltage, the size of the arc-drawing space can be changed by changing the magnitude of the arc voltage, thereby changing the length and density of the arc entering the arc-drawing space and avoiding damage to the equipment by the arc. When the arc is small but the arc-drawing space is too large, the traction electric field is not enough to draw the arc to the arc-extinguishing space for arc extinguishing. When the arc is large but the arc-drawing space is small, there is a safety risk of the large voltage damaging the equipment. Example 3

[0045] The difference from the above embodiment is that the telescopic portions of the telescopic arc-inducing plate 7 and the telescopic placement groove 9 are both made of insulating elastic material.

[0046] The specific implementation process is as follows:

[0047] The retractable arc-starting plate 7 and the retractable placement groove 9, made of insulating elastic material, can not only meet the needs of arc-starting spaces of different sizes, but also isolate arc leakage and improve the safety of the equipment. Example 4

[0048] The difference from the above embodiments is that, as shown in the appendix... Figure 4 As shown, the first control circuit includes a first circuit switch 17 and a first electromagnet 18 connected in series. The output end of the first electromagnet 18 is connected to a first traction rod 19. The end of the first traction rod 19 away from the first electromagnet 18 is connected to the rotating bracket 13. When the first control circuit is connected, the first electromagnet 18 can drive the first traction rod 19 and the moving contact 14 to close with the first stationary contact 11.

[0049] The specific implementation process is as follows:

[0050] By controlling whether the first control circuit is connected or not, the moving contact 14 and the first stationary contact 11 are closed. Compared with the existing technology where the three-position ASTE is driven by three electromagnet coils, this solution simplifies the driving mechanism while ensuring operational reliability, making it easier for users to operate. Example 5

[0051] The difference from the above embodiments is that, as shown in the appendix... Figure 4As shown, the second control circuit includes a second circuit switch 16 and a second electromagnet 21 connected in series. The output end of the second electromagnet 21 is connected to a second traction rod 22. The end of the second traction rod 22 away from the second electromagnet 21 is connected to a rotating bracket 13. When the second control circuit is connected, the second electromagnet 21 can drive the second traction rod 22 and the moving contact 14 to close with the second stationary contact 12. By setting up the second control circuit, the moving contact is controlled, allowing it to close with the stationary contact when needed, thereby controlling the circuit. Simultaneously, by setting up the second traction rod and the rotating bracket, the closing of the moving contact can be controlled more stably, improving the reliability and stability of the circuit. Therefore, the present invention has good technical effects.

[0052] The specific implementation process is as follows:

[0053] By controlling whether the second control circuit is connected or not, the moving contact 14 and the second stationary contact 12 are closed. Compared with the existing technology where the three-position ASTE is driven by three electromagnet coils, this solution simplifies the driving mechanism while ensuring operational reliability, making it easier for users to operate. Example 6

[0054] The difference from the above embodiments is that, as shown in the appendix... Figure 4 As shown, a first elastic element 20 and a second elastic element 23 are fixedly connected to the base 1. The end of the first elastic element 20 away from the base 1 is fixedly connected to the first traction rod 19, and the end of the second elastic element 23 away from the base 1 is fixedly connected to the second traction rod 22.

[0055] The specific implementation process is as follows:

[0056] When the first circuit switch 17 is closed, the first control circuit is connected. The first electromagnet 18 drives the moving contact 14 to close with the first stationary contact 11. The first elastic element 20 is compressed, and the second elastic element 23 is stretched. Under the balance of the elastic forces of the first elastic element 20 and the second elastic element 23, the moving contact 14 is locked to the first stationary contact 11, which improves the stability of the device. The same applies when the second circuit switch is closed. When both the first circuit switch 17 and the second circuit switch 16 are open, the device still remains stable under the balance of the elastic forces of the first elastic element 20 and the second elastic element 23. Compared with the existing technology that uses multiple electromagnets for control, this solution simplifies the structure and ensures stability. Example 7

[0057] The difference from the above embodiments is that, as shown in the appendix... Figure 3As shown, a limiting arc-inducing plate 15 is provided between the arc-extinguishing components of the first stationary contact 11 and the second stationary contact 12. In this embodiment, the limiting arc-inducing plate 15 is arc-shaped, and its inner diameter abuts against the movement trajectory of the moving contact 14. By setting the limiting arc-inducing plate, the arc-extinguishing components between the first stationary contact 11 and the second stationary contact 12 can be restricted during movement, thereby effectively avoiding excessive swinging and collision of the arc-extinguishing components and ensuring the stability and reliability of the equipment. At the same time, the arc-shaped design of the limiting arc-inducing plate allows it to abut against the movement trajectory of the moving contact, thereby reducing the movement resistance of the arc-extinguishing components and improving the operating efficiency of the equipment. Therefore, this embodiment has good technical effects.

[0058] The specific implementation process is as follows:

[0059] The limiting arc-starting plate 15 allows the electric arc to move within the arc-starting space, preventing arc leakage. Example 8

[0060] The difference from the above embodiments is that, as shown in the appendix Figure 1 As shown, the dual power automatic transfer switch also includes an insulating cover 3, which can cover the power switching components.

[0061] The specific implementation process is as follows:

[0062] The insulating cover 3 covers the power switching component to prevent arc leakage during power switching and improve the safety of the operator when switching power.

[0063] It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this invention, and these should also be considered within the scope of protection of this invention. These modifications and improvements will not affect the effectiveness of the invention or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A dual-power automatic transfer switch, comprising a base, characterized in that: The base is symmetrically provided with a first backup power supply and a second backup power supply. The first backup power supply and the second backup power supply are respectively provided with a first stationary contact and a second stationary contact. A power switching component is provided between the first backup power supply and the second backup power supply. The power switching assembly includes a rotating bracket, which is movably connected to the base. A moving contact is fixedly connected to one end of the rotating bracket. The moving contact can move between a first stationary contact, a second stationary contact, and a double-position. A rotary switch is provided at the end of the rotating bracket away from the moving contact. A first control circuit and a second control circuit are connected in series and in parallel between the rotary switch and the rotating bracket. An arc-extinguishing assembly is provided above both the first stationary contact and the second stationary contact. The arc extinguishing assembly includes a retractable placement slot, which contains several arc extinguishing grids. The sidewall of the retractable placement slot is slidably connected to the base. Two sets of magnetic sheets are slidably connected to the bottom of the retractable placement slot. The magnetic sheets are placed parallel to the surface of the base and fixedly connected to the base. A retractable arc-inducing plate is provided between the side of the magnetic sheet away from the moving contact and the retractable placement slot. The magnetic sheets and the retractable arc-inducing plate form an arc-drawing space. A permanent magnet is placed on the magnetic sheet along the direction perpendicular to the magnetic sheet. The magnetic sheet and the permanent magnet form a traction electric field. The traction electric field can draw the arc to the arc extinguishing space. The retractable placement slot includes an integrally formed fixed part and a telescopic part. The movable end of the telescopic part is connected to an electric actuator. The end of the electric actuator away from the telescopic part is fixedly connected to the base. A pressure sensor for testing the magnitude of the arc voltage is provided in the arc-drawing space. The displacement change of the electric actuator is positively correlated with the magnitude of the arc voltage.

2. The dual-power automatic transfer switch according to claim 1, characterized in that: The telescopic parts of both the telescopic arc-guiding plate and the telescopic placement groove are made of insulating elastic material.

3. The dual-power automatic transfer switch according to claim 1, characterized in that: The first control circuit includes a first circuit switch and a first electromagnet connected in series. The output end of the first electromagnet is connected to a first traction rod. The end of the first traction rod away from the first electromagnet is connected to a rotating bracket. When the first control circuit is connected, the first electromagnet can drive the first traction rod and the moving contact to close with the first stationary contact.

4. The dual-power automatic transfer switch according to claim 1, characterized in that: The second control circuit includes a first circuit switch and a first electromagnet connected in series. The output end of the first electromagnet is connected to a first traction rod. The end of the first traction rod away from the second electromagnet is connected to a rotating bracket. When the second control circuit is connected, the second electromagnet can drive the second traction rod and the moving contact to close with the second stationary contact.

5. The dual-power automatic transfer switch according to claim 1, characterized in that: A first elastic element and a second elastic element are fixedly connected to the base. The end of the first elastic element away from the base is fixedly connected to the first traction rod, and the end of the second elastic element away from the base is fixedly connected to the second traction rod.

6. The dual-power automatic transfer switch according to claim 1, characterized in that, A limiting arc-starting plate is provided between the arc-extinguishing components of the first stationary contact and the arc-extinguishing components of the second stationary contact.

7. The dual-power automatic transfer switch according to claim 1, characterized in that, An insulating cover is provided on the base to cover the power switching component.

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