A backup power automatic switching device for security section and a fast switching device

Abstract

The utility model discloses a spare power automatic switching and motor protection quick switching device for security section relates to security section equipment technical field. The utility model discloses utilize open contact and closed contact to realize motor controller control power supply and self -starting function detection voltage quick switching between work and standby power supply, guarantee the switch in the spare power automatic switching process and keep in the operating state, the power failure of each equipment in the section is shortened to 1 within the hour from 6 seconds to restore time. Guarantee unit safe and reliable operation, through open contact and closed contact respectively introduce this section bus voltage signal and spare section voltage signal to motor protection voltage terminal, utilize the opening and closing contact synchronous action when switching contactor action, realized this section bus voltage and spare section voltage effective isolation, prevent two section voltage loop event from happening, through the open contact of switching contactor string connection work power insurance and work position contact point, cooperate with the closed contact of spare control power that introduces, prevent two control power loop.

Description

Technical Field

[0001] This utility model relates to the field of security section equipment technology, specifically to a backup automatic switching and horse-mounted quick-switching device for security sections. Background Technology

[0002] The safety section ensures safe shutdown and timely restoration of power in the event of a power outage, even if both auxiliary and backup power supplies are unavailable. The loads connected to this section include critical low-voltage loads such as the oil pump power supply for important rotating machines, turning gears, stator cooling water pumps, hydrogen-side air-side sealing oil pumps, and flame detection fans.

[0003] The automatic switching process takes nearly 0.9 seconds, which greatly exceeds the allowable power outage time (0.1s) and self-start detection of pressure loss time (<0.2s) of the power supply to the generator set. This results in the generator set being powered off for nearly 6 seconds before it can resume operation. Consequently, many important loads that were originally running before the switchover, such as the stator cooling water pump, the air-hydrogen side sealing oil pump, the oil pumps of various large transfer station oil stations, and the flame detection fan, are shut down for 6 seconds, posing a significant safety hazard to the safe operation of the unit. Therefore, we propose an automatic switching and generator set quick-switching device for the safety section. Utility Model Content

[0004] The purpose of this utility model is to provide a backup automatic switching and horse protection quick switching device for a security section in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A backup automatic switching and quick-connection device for a security section includes: a drawer cabinet switch, and a connecting mechanism and a switching mechanism installed inside the drawer cabinet switch. Mounting holes corresponding to the connecting mechanism and the switching mechanism are provided on both sides of the drawer cabinet switch. The connecting mechanism includes a backup control power supply, and a connecting seat is provided on the rear side of the backup control power supply. Multiple fixing posts are movably installed horizontally inside the connecting seat. The switching mechanism includes a switching contactor, with five open contacts evenly arranged horizontally on the front side of the switching contactor and five closed contacts evenly arranged horizontally on the rear side of the switching contactor. A positioning post is movably installed inside each of the open and closed contacts.

[0007] Furthermore, both sides of the drawer switch are equipped with slide rails, and the drawer switch is connected to the control cabinet through the slide rails.

[0008] Furthermore, extension plates are installed at each of the four corners of the backup control power supply, and fixing bolts can be detachably installed inside each extension plate.

[0009] Furthermore, mounting plates are installed at the four corners of the switching contactor, and mounting bolts can be detachably installed inside each mounting plate.

[0010] Furthermore, the open contact on the left is connected to the A-phase voltage of the busbar, the three open contacts in the middle introduce the three-phase working voltage to the protection detection voltage terminal, and the open contact on the right is connected in series between the power fuse and the working position contact.

[0011] Furthermore, the closed contact on the left side leads the A-phase voltage of the spare bus section to the power supply of the servo control via the switching handle. The three closed contacts in the middle are used to introduce the voltage of another spare bus section to the three-phase detection voltage terminal of the servo control. The closed contact on the rear side is connected in series with the fault lamp to both ends of the servo control power supply.

[0012] Furthermore, a pull-out frame is installed on the front of the drawer cabinet switch.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model adds a switching contactor, which uses open and closed contacts to realize the rapid switching between working and standby power supplies for the motor controller control power supply and the detection voltage of the self-starting function. This ensures that the switch remains in the running state during the automatic transfer switching process, and shortens the power loss and recovery time of each device in the section from 6 seconds to less than 1 second, ensuring the safe and reliable operation of the unit.

[0015] 2. This utility model introduces the voltage signal of the current bus section and the voltage signal of the standby section to the voltage terminal of the busbar through the open contact and the closed contact respectively. When the switching contactor is activated, the open and closed contacts are activated synchronously, which realizes the effective isolation between the voltage of the current bus section and the voltage of the standby section and prevents the two voltages from looping together.

[0016] 3. This utility model realizes a self-recovery function. When the working voltage is restored, the control power supply of each motor and the three-phase detection voltage will be automatically restored and switched back to the working voltage.

[0017] 4. This utility model prevents the two control power supplies from being closed by switching one open contact of the contactor in series with the working power supply fuse and the working position contact, and cooperating with the closed contact of the backup control power supply. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a three-dimensional schematic diagram of the drawer cabinet switch in this utility model;

[0020] Figure 3 This is a three-dimensional schematic diagram of the connecting mechanism in this utility model;

[0021] Figure 4 This is a three-dimensional schematic diagram of the switching mechanism in this utility model.

[0022] Reference numerals: 10, drawer switch; 20, connecting mechanism; 21, backup control power supply; 22, connecting base; 23, fixing post; 24, extension plate; 25, fixing bolt; 30, switching mechanism; 31, switching contactor; 32, open contact; 33, closed contact; 34, positioning post; 35, mounting plate; 36, mounting bolt; 40, slide rail; 50, mounting hole; 60, pull-out frame. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0024] Please see Figure 1 - Figure 4 This utility model provides a backup automatic switching and horse protection quick-switching device for a security section, including: a drawer cabinet switch 10, and a connecting mechanism 20 and a switching mechanism 30 installed inside the drawer cabinet switch 10. The drawer cabinet switch 10 has mounting holes 50 on both sides corresponding to the connecting mechanism 20 and the switching mechanism 30. The connecting mechanism 20 includes a backup control power supply 21, and a connecting seat 22 is provided on the rear side of the backup control power supply 21. Multiple fixing columns 23 are movably installed in the horizontal direction inside the connecting seat 22.

[0025] The drawer switch 10 ensures the installation stability of the connecting mechanism 20 and the switching mechanism 30. The mounting hole 50 allows for the insertion of connecting wires, and the connecting seat 22 and the fixing post 23 work together to fix the connecting wires.

[0026] Lead the backup control power supply 21 lead wire to the backup terminal at the rear of each drawer's motor protection interval. Since the original power supply for the test position in each motor protection drawer was taken from the A phase voltage of this bus, remove the original power supply and introduce the backup A phase voltage. Use the backup external lead interface of the motor protection drawer to introduce the backup B and C phase voltages.

[0027] The switching mechanism 30 includes a switching contactor 31. Five open contacts 32 are evenly arranged on the front side of the switching contactor 31 along the horizontal direction, and five closed contacts 33 are evenly arranged on the rear side of the switching contactor 31 along the horizontal direction. A positioning post 34 is movably installed inside each open contact 32 and each closed contact 33.

[0028] The positioning post 34 enables the positioning of the wires inside the open contact 32 and the closed contact 33.

[0029] The working voltage and backup power supply voltage signals are introduced into the motor controller voltage circuit by using open contact 32 and closed contact 33 respectively, so as to realize the control power switching synchronously. Since the switching time is less than 0.1 seconds, the control power supply is guaranteed not to lose power, and the switching is completed within the power failure detection time in the self-recovery start-up. During the backup automatic transfer switching process, the motor protection contactor is always in the closed position to achieve seamless switching. The equipment resumes operation within 0.9 seconds of power failure, which has no impact on the safe operation of the unit.

[0030] By utilizing open contact 32 and closed contact 33, the control power supply and self-starting function detection voltage of the motor controller are rapidly switched between the working and standby power supplies. This ensures that the switch remains in operation during the automatic transfer switching process, reducing the power loss and recovery time of each device in the section from 6 seconds to less than 1 second, ensuring the safe and reliable operation of the unit. After introducing the bus voltage signal of this section and the standby section voltage signal to the motor protection voltage terminal through open contact 32 and closed contact 33 respectively, the synchronous action of the open and closed contacts when the contactor operates effectively isolates the bus voltage of this section from the standby section voltage, preventing the two voltage loops from occurring. The self-recovery function is implemented, and when the working voltage is restored, the control power supply and three-phase detection voltage of each motor protection device are automatically restored and switched back to the working voltage. By connecting one open contact 32 of the switching contactor 31 in series between the working power supply fuse and the working position contact, and cooperating with the closed contact of the introduced standby control power supply, the loop of the two control power supplies is prevented.

[0031] In this embodiment, preferably, slide rails 40 are installed on both sides of the drawer switch 10, and the drawer switch 10 is connected to the control cabinet through the slide rails 40; by setting the slide rails 40, the sliding stability between the drawer switch 10 and the control cabinet can be improved, and the drawer switch 10 can be prevented from tilting.

[0032] In this embodiment, preferably, extension plates 24 are installed at the four corners of the backup control power supply 21, and fixing bolts 25 can be detachably installed inside each extension plate 24; the inner bottom wall of the drawer switch 10 is provided with threaded holes, and the fixing bolts 25 are connected to the threaded holes by threads. Under the action of the fixing bolts 25, the installation stability of the extension plates 24 can be guaranteed, thereby ensuring the overall installation stability of the backup control power supply 21. Moreover, by removing the fixing bolts 25, the backup control power supply 21 can be completely disassembled.

[0033] In this embodiment, preferably, mounting plates 35 are installed at all four corners of the switching contactor 31, and mounting bolts 36 can be detachably installed inside each mounting plate 35; threaded holes are opened on the inner bottom wall of the drawer switch 10, and the mounting bolts 36 are connected to the threaded holes by threads. Under the action of the mounting bolts 36, the installation stability of the mounting plates 35 can be guaranteed, thereby ensuring the overall installation stability of the switching contactor 31. Moreover, by removing the mounting bolts 36, the entire switching contactor 31 can be disassembled.

[0034] In this embodiment, preferably, the open contact 32 on the left is connected to the A-phase voltage of the bus, the three open contacts 32 in the middle introduce the three-phase working voltage to the protection detection voltage terminal, and the open contact 32 on the right is connected in series between the power supply fuse and the working position contact; by connecting one open contact 32 in series between the working power supply fuse and the working position contact, and cooperating with the closed contact of the backup control power supply, the loop of the two control power supplies is prevented from being closed.

[0035] In this embodiment, preferably, the closed contact 33 on the left side leads the A-phase voltage of the spare bus section to the power supply of the busbar control via the switching handle. The three closed contacts 33 in the middle are used to introduce the voltage of the other spare bus section to the three-phase detection voltage terminal of the busbar control. The closed contact 33 on the rear side is connected in series with the fault light to both ends of the power supply of the busbar control. When the light of the bus section is energized, it indicates that the switching contactor is damaged and should be replaced in time. Since the contactor is connected when the bus is not de-energized, the common closed contact is in the open state, and the backup control power supply and the three-phase voltage of the spare section will not be connected. This effectively isolates the working bus voltage from the backup bus, and the two sections will not form a closed loop.

[0036] When the power supply to this section fails, the switching contactor 31 loses power, and the power supply to the busbar control and the detection voltage signal also lose power. Its closed contact momentarily closes (<0.1S). Among them, three closed contacts 33 introduce the three-phase voltage of the backup busbar to the detection voltage terminal of the busbar, and at the same time, one closed contact introduces the backup voltage A phase into the busbar control power supply. Since the closed contact 33 closes momentarily (<0.1S), the busbar will not lose power. At the same time, the detection of the three-phase voltage signal completes the switching in <0.1S, which is less than the power failure detection time (0.2S), so no trip signal will be issued. The switching contactor 31 remains closed. After the backup automatic transfer switch is completed in 0.9S, the backup power supply is introduced and the equipment starts up in the controller, that is, the load of this section resumes operation 0.9S after power failure.

[0037] After the equipment is powered back on after the automatic transfer switch is completed, the working bus voltage is restored and the switching contactor 31 is running. The opening contact 32 closes momentarily to connect the bus voltage signal and control power supply to the Ma Baozhong, and simultaneously disconnects the standby side voltage signal and control power supply, restoring the initial operating state.

[0038] In this embodiment, preferably, a pull-out frame 60 is installed on the front of the drawer switch 10; by setting the pull-out frame 60, a force point can be provided for pulling out and inserting the drawer switch 10, making it convenient to use.

[0039] Working principle and usage process of this utility model:

[0040] Under the action of the drawer switch 10, the installation stability of the connection mechanism 20 and the switching mechanism 30 can be guaranteed. The lead wire of the backup control power supply 21 is led to the backup terminal at the rear of each drawer's motor protection interval. Since the original power supply of the test position in each motor protection drawer was taken from the A phase voltage of this bus, the original power supply is removed and the backup A phase voltage is introduced. The backup B and C phase voltages are introduced through the backup external lead interface of the motor protection drawer.

[0041] The open contact 32 and closed contact 33 are used to introduce the working voltage and backup power supply voltage signals into the motor controller voltage circuit, respectively, to synchronously achieve control power switching. Since the switching time is less than 0.1 seconds, it ensures that the control power supply is not lost and also meets the requirement of completing the switching within the power failure detection time during self-recovery startup. During the automatic transfer switching process, the contactor inside the motor controller remains in the closed position, achieving seamless switching. The equipment resumes operation within 0.9 seconds of power failure, without affecting the safe operation of the unit. The open contact 32 and closed contact 33 enable rapid switching of the motor controller control power supply and the detection voltage for the self-starting function between working and backup power supplies, ensuring that the switch remains in the running state during the automatic transfer switching process. The power loss and recovery time for all internal equipment is reduced from 6 seconds to less than 1 second, ensuring the safe and reliable operation of the unit. After the voltage signals of the current bus section and the standby section are introduced to the voltage terminals of the protection device through the open contact 32 and the closed contact 33 respectively, the synchronous action of the open and closed contacts when the contactor is activated effectively isolates the voltage of the current bus section from the standby section voltage, preventing the two voltages from looping together. The self-recovery function is realized. When the working voltage is restored, the control power supply of each protection device and the three-phase detection voltage are automatically restored and switched to the working voltage. By switching one open contact 32 of the contactor 31 in series between the working power supply fuse and the working position contact, and cooperating with the closed contact of the introduced standby control power supply, the loop of the two control power supplies is prevented from being closed.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A backup automatic switching and horse-powered quick-switching device for a safety depot, comprising: A drawer switch (10), and a connecting mechanism (20) and a switching mechanism (30) installed inside the drawer switch (10), characterized in that the drawer switch (10) has mounting holes (50) on both sides corresponding to the connecting mechanism (20) and the switching mechanism (30); the connecting mechanism (20) includes a backup control power supply (21), and a connecting seat (22) is provided on the rear side of the backup control power supply (21), and multiple fixing columns (23) are movably installed in the horizontal direction inside the connecting seat (22); the switching mechanism (30) includes a switching contactor (31), and five open contacts (32) are evenly arranged in the horizontal direction on the front side of the switching contactor (31), and five closed contacts (33) are evenly arranged in the horizontal direction on the rear side of the switching contactor (31), and a positioning column (34) is movably installed inside each of the open contacts (32) and each of the closed contacts (33).

2. The automatic switching and quick-connection device for a safety section according to claim 1, characterized in that: The drawer switch (10) is equipped with slide rails (40) on both sides, and the drawer switch (10) is connected to the control cabinet through the slide rails (40).

3. The automatic switching and quick-change device for a safety section according to claim 1, characterized in that: The backup control power supply (21) is equipped with extension plates (24) at each of its four corners, and each extension plate (24) has a fixing bolt (25) that can be detached and installed inside.

4. The automatic switching and quick-change device for a safety section according to claim 1, characterized in that: Mounting plates (35) are installed at the four corners of the switching contactor (31), and mounting bolts (36) can be detachably installed inside each mounting plate (35).

5. A backup automatic switching and horse-powered quick-switching device for a security section according to claim 1, characterized in that: The open contact (32) on the left is connected to the A-phase voltage of the busbar, the three open contacts (32) in the middle introduce the three-phase working voltage to the voltage terminal of the power supply detection device, and the open contact (32) on the right is connected in series between the power supply fuse and the working position contact.

6. A backup automatic switching and horse-powered quick-switching device for a safety section according to claim 1, characterized in that: The closed contact (33) on the left side leads the A-phase voltage of the spare bus section to the Ma Bao control power supply through the switching handle. The three closed contacts (33) in the middle are used to introduce the voltage of the other spare bus section to the three-phase detection voltage terminal of the Ma Bao. The closed contact (33) on the rear side is connected in series with the fault lamp to both ends of the Ma Bao working control power supply.

7. A backup automatic switching and horse-powered quick-switching device for a security section according to claim 1, characterized in that: The front of the drawer switch (10) is equipped with a pull-out frame (60).

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