Load-bearing floor electric control system of gate for nuclear power station

Abstract

The invention provides a load-bearing floor electric control system of a gate for a nuclear power station. Comprising a touch screen, a button with a lamp, a two-gear switch, a three-gear switch, a key switch, a scram button, a molded case circuit breaker, a direct current power supply, a power supply protection phase sequence relay, a PLC-CPU module, a PLC-DI / DQ module, a PLC-DQ module, a socket, a temperature control switch, a three-phase miniature circuit breaker, a single-phase miniature circuit breaker, a motor protection circuit breaker, a miniature relay and an alternating current contactor. And a terminal strip, a transformer and an installation auxiliary material line. According to the system, independent control over the bearing floor is achieved without the help of other external equipment. The device can be operated on the control cabinet and the hand-operated box, and the hand-operated box can be moved, so that the operation is simpler and more convenient. By adding the power supply protection phase sequence relay and the motor protector circuit breaker, protection is perfect, and when overload or short circuit occurs, the contactor is disconnected to cut off the circuit, so that fault expansion is avoided, and the motor is protected at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power electrical control systems, and in particular, to an electrical control system for a load-bearing floor of a gate in a nuclear power plant. Background Art

[0002] The equipment gates and their load-bearing floors in a nuclear power plant are important facilities to ensure the safe operation of the nuclear power plant. There are problems such as complex installation, high precision requirements, and cumbersome on-site commissioning in the installation and control systems of traditional gates and load-bearing floors. For example, in the prior art, complex hoisting and adjustment tooling are required to complete the installation of the load-bearing floor. In addition, the traditional electrical control system still needs to be improved in terms of automation and reliability.

[0003] In the operation of the existing load-bearing floors in nuclear power plants, there are many inconveniences. First, two electric hooks of the load-bearing floor need to be operated by two people simultaneously, with complex coordination, low efficiency, and easy operation errors due to improper cooperation. Second, the cable distance is long. Once a fault occurs, it is difficult to troubleshoot and the repair takes a long time, seriously affecting the normal operation and maintenance efficiency of the equipment. These problems not only increase the labor cost but also reduce the reliability and safety of the system, and urgent technical improvements are needed to optimize the operation process and improve the system performance. Summary of the Invention

[0004] In view of the technical problems in the above-mentioned background art, an electrical control system for a load-bearing floor of a gate in a nuclear power plant is provided.

[0005] The technical means adopted by the present invention are as follows:

[0006] An electrical control system for a load-bearing floor of a gate in a nuclear power plant, comprising:

[0007] A touch screen, a lighted button, a two-position switch, a three-position switch, a key switch, an emergency stop button, a molded case circuit breaker, a DC power supply, a power protection phase sequence relay, a PLC-CPU module, a PLC-DI / DQ module, a PLC-DQ module, a socket, a temperature control switch, a three-phase miniature circuit breaker, a single-phase miniature circuit breaker, a motor protection circuit breaker, a small relay, an AC contactor, a terminal block, and a transformer and installation auxiliary material lines;

[0008] The touch screen, the lighted button, the two-position switch, the three-position switch, the key switch, and the emergency stop button are all arranged on the control cabinet door panel;

[0009] The molded case circuit breaker, the DC power supply, the power protection phase sequence relay, the PLC-CPU module, the PLC-DI / DQ module, the PLC-DQ module, the socket, the temperature control switch, the three-phase miniature circuit breaker, the single-phase miniature circuit breaker, the motor protection circuit breaker, the small relay, the AC contactor, the terminal block, and the transformer and installation auxiliary material circuits are all arranged in the control cabinet.

[0010] Further, external signals are collected through the PLC-CPU module, the PLC-DI / DQ module, and the PLC-DQ module.

[0011] Further, the two-position switch, the three-position switch, and the key switch are respectively connected to the PLC-CPU module, the PLC-DI / DQ module, and the PLC-DQ module.

[0012] Further, forward and reverse control is achieved through the AC contactor.

[0013] Further, the three-phase miniature circuit breaker, the single-phase miniature circuit breaker, the motor protection circuit breaker, and the small relay are connected in sequence and arranged in the control cabinet in sequence.

[0014] Further, the output end of the DC power supply is connected to the input end of the power protection phase sequence relay; the output end of the power protection phase sequence relay is connected to the input end of the PLC-CPU module; the output end of the PLC-CPU module is connected to the input end of the PLC-DI / DQ module; the output end of the PLC-DI / DQ module is connected to the input end of the PLC-DQ module; the output end of the PLC-DQ module is connected to the socket;

[0015] The socket is connected to the temperature control switch.

[0016] Further, the AC contactor is connected to the terminal block.

[0017] Further, there are 2 three-phase miniature circuit breakers; there are 3 single-phase miniature circuit breakers; there are 11 small relays; there are 5 AC contactors.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The system of the present invention realizes the independent control of the load-bearing floor without relying on other external devices. It can be operated both on the control cabinet and the hand-held operation box. The hand-held operation box can be moved for more convenient operation. By adding a power protection phase sequence relay and a motor protector circuit breaker, the protection is perfect. When overload or short circuit occurs, the contactor disconnects to cut off the circuit, avoiding the expansion of the fault and protecting the motor at the same time.

[0020] The system of the present invention has an emergency stop function. In case of emergency, the circuit can be cut off through the contactor to stop the motor. There are touch screens on both the control cabinet and the hand-held operation box, which can display information such as the state, limit, and fault of the load-bearing floor, facilitating operation, use, and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic diagram of the external structure of the system of the present invention.

[0023] Figure 2 It is a schematic diagram of the internal structure of the system of the present invention.

[0024] Among them; 1 is a touch screen; 2 is a button with a light; 3 is a two-position switch; 4 is a three-position switch; 5 is a key switch; 6 is an emergency stop button; 7 is a molded case circuit breaker; 8 is a DC power supply; 9 is a power protection (phase sequence relay); 10 is a PLC-CPU module; 11 is a PLC-DI / DQ module; 12 is a PLC-DQ module; 13 is a socket; 14 is a temperature control switch; 15 is a three-phase miniature circuit breaker; 16 is a single-phase miniature circuit breaker; 17 is a motor protection circuit breaker; 18 is a small relay; 19 is an AC contactor; 20 is a terminal block; 21 is a transformer and installation auxiliary material circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail the present invention.

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. The following description of at least one exemplary embodiment is actually illustrative only and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present invention, it should be understood that the orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. generally indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. The orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0030] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations will be made for the spatial relative descriptions used herein.

[0031] In addition, it should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0032] As Figure 1 、 Figure 2 shown, the present invention provides an electric control system for the load-bearing floor of a gate used in a nuclear power plant, including:

[0033] a touch screen 1, a lighted button 2, a two-position switch 3, a three-position switch 4, a key switch 5, an emergency stop button 6, a molded case circuit breaker 7, a DC power supply 8, a power protection phase sequence relay 9, a PLC-CPU module 10, a PLC-DI / DQ module 11, a PLC-DQ module 12, a socket 13, a temperature control switch 14, a three-phase miniature circuit breaker 15, a single-phase miniature circuit breaker 16, a motor protection circuit breaker 17, a small relay 18, an AC contactor 19, a terminal block 20, and a transformer and installation auxiliary material circuit 21;

[0034] The touch screen 1, the lighted button 2, the two-position switch 3, the three-position switch 4, the key switch 5, and the emergency stop button 6 are all arranged on the control cabinet door panel;

[0035] The molded case circuit breaker 7, the DC power supply 8, the power protection phase sequence relay 9, the PLC-CPU module 10, the PLC-DI / DQ module 11, the PLC-DQ module 12, the socket 13, the temperature control switch 14, the three-phase miniature circuit breaker 15, the single-phase miniature circuit breaker 16, the motor protection circuit breaker 17, the small relay 18, the AC contactor 19, the terminal block 20, and the transformer and installation auxiliary material circuit 21 are all arranged in the control cabinet.

[0036] Preferably, external signals are collected through the PLC-CPU module 10 , the PLC-DI / DQ module 11 and the PLC-DQ module 12 .

[0037] As a preferred embodiment, in the present application, the two-speed switch 3, the three-speed switch 4 and the key switch 5 are connected to the PLC-CPU module 10, the PLC-DI / DQ module 11 and the PLC-DQ module 12 respectively.

[0038] Preferably, forward and reverse rotation control is achieved through the AC contactor 19.

[0039] In a preferred embodiment, the three-phase miniature circuit breaker 15 , the single-phase miniature circuit breaker 16 , the motor protection circuit breaker 17 and the miniature relay 18 are sequentially connected and arranged in the control cabinet.

[0040] In a preferred embodiment, the output end of the DC power supply 8 is connected to the input end of the power protection phase sequence relay 9; the output end of the power protection phase sequence relay 9 is connected to the input end of the PLC-CPU module 10; the output end of the PLC-CPU module 10 is connected to the input end of the PLC-DI / DQ module 11; the output end of the PLC-DI / DQ module 11 is connected to the input end of the PLC-DQ module 12; the output end of the PLC-DQ module 12 is connected to the socket 13; and the socket 13 is connected to the temperature control switch 14.

[0041] In a preferred embodiment, the AC contactor 19 is connected to the terminal block 20. Two three-phase miniature circuit breakers 15 are provided; three single-phase miniature circuit breakers 16 are provided; eleven miniature relays 18 are provided; and five AC contactors 19 are provided.

[0042] As an embodiment of the present application, the flipping action of the flipping floor is driven by an electric hoist with its own control box. The control box of the electric hoist has high-speed and low-speed control, forward and reverse rotation, and controls the rise and fall of the hook of the electric hoist, and high and low speed.

[0043] Because the control circuit of the control box inside the electric hoist uses a power supply separate from the power supply of the load-bearing floor control cabinet, the control command is transmitted to the electric hoist control box through the 18 small relay contact states inside the load-bearing floor control cabinet to achieve control.

[0044] The touch screen 1 and the illuminated button 2 on the control cabinet door panel give control commands through the two-speed switch 3, the three-speed switch 4, and the key switch 5. The PLC-CPU module 10, the PLC-DI / DQ module 11, and the PLC-DQ module 12 collect external signals such as power supply phase sequence, voltage, limit, and circuit breaker closing status to perform logical operations, and finally output a high-level signal to control the corresponding relay to connect, so as to realize the lifting and lowering of the electric hoist hook, high-speed and low-speed actions, and synchronous control of the electric hooks of the two electric hoists.

[0045] The sliding floor's translation is driven by the sliding floor motor. Forward and reverse rotation are controlled by the contactor in the load-bearing floor control cabinet, while the motor protector provides overload protection for the motor. The touch screen 1 and the illuminated button 2 on the control cabinet door panel give control commands through the two-speed switch 3, the three-speed switch 4, and the key switch 5. The PLC-CPU module 10, the PLC-DI / DQ module 11, and the PLC-DQ module 12 collect external signals such as power supply phase sequence, voltage, limit, and circuit breaker closing status for logical operations, and finally output a high-level signal to control the corresponding contactor. The connection of the corresponding contactor main contacts can change the phase sequence connected to the motor stator winding to achieve forward and reverse control; the opening and closing of the motor brake, the rectifier block of the translation motor brake is powered by 380V, and any two of the three-phase stator windings connected to the translation floor motor are connected to the rectifier block power supply connection in the translation floor motor junction box, which can ensure that the opening and closing of the brake and the three-phase stator winding of the translation floor motor are energized at the same time to ensure the normal operation of the translation floor motor.

[0046] As an implementation method, the voltage to the power supply coils of all contactors is cut off, de-energizing the contactor coils. This disconnects the main contacts, cutting off power to the electric hoist and the sliding floor motor, achieving an emergency stop. The power protection phase sequence relay has three adjustment knobs: voltage range, out-of-range duration, and voltage fluctuation value. These can be adjusted based on the power supply conditions at the installation site. Under normal operating conditions, the relay output closes. In abnormal situations, such as voltage out of range or phase sequence changes, the output opens. Upon receiving this signal, the PLC-CPU blocks the output, disconnecting the relays and contactors, thus achieving protection.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic control system for the load-bearing floor of a gate used in a nuclear power plant, characterized in that, Including: Touch screen (1), illuminated button (2), two-position switch (3), three-position switch (4), key switch (5), emergency stop button (6), molded case circuit breaker (7), DC power supply (8), power protection phase sequence relay (9), PLC-CPU module (10), PLC-DI / DQ module (11), PLC-DQ module (12), socket (13), temperature control switch (14), three-phase miniature circuit breaker (15), single-phase miniature circuit breaker (16), motor protection circuit breaker (17), small relay (18), AC contactor (19), terminal block (20), and transformer and installation auxiliary materials circuit (21); The touch screen (1), the illuminated button (2), the two-position switch (3), the three-position switch (4), the key switch (5), and the emergency stop button (6) are all arranged on the control cabinet door panel; The molded case circuit breaker (7), the DC power supply (8), the power protection phase sequence relay (9), the PLC-CPU module (10), the PLC-DI / DQ module (11), the PLC-DQ module (12), the socket (13), the temperature control switch (14), the three-phase miniature circuit breaker (15), the single-phase miniature circuit breaker (16), the motor protection circuit breaker (17), the small relay (18), the AC contactor (19), the terminal block (20), and the transformer and installation auxiliary materials circuit (21) are all arranged in the control cabinet.

2. The electric control system of the load-bearing floor of a gate for a nuclear power plant according to claim 1, characterized in that, External signals are collected through the PLC-CPU module (10), the PLC-DI / DQ module (11), and the PLC-DQ module (12).

3. The electric control system of the load-bearing floor of a gate used in a nuclear power plant according to claim 1, characterized in that, The illuminated button (2), the two-position switch (3), the three-position switch (4), and the key switch (5) are respectively connected to the PLC-CPU module (10), the PLC-DI / DQ module (11), and the PLC-DQ module (12).

4. The electric control system of the load-bearing floor of a gate for a nuclear power plant according to claim 1, characterized in that, Forward and reverse control is achieved through the AC contactor (19).

5. The electric control system of the load-bearing floor of a gate used in a nuclear power plant according to claim 1, characterized in that, The three-phase miniature circuit breaker (15), the single-phase miniature circuit breaker (16), the motor protection circuit breaker (17), and the small relay (18) are connected in sequence and arranged in the control cabinet in sequence.

6. The electric control system for the load-bearing floor of a gate used in a nuclear power plant according to claim 1, wherein, The output end of the DC power supply (8) is connected to the input end of the power protection phase sequence relay (9); the output end of the power protection phase sequence relay (9) is connected to the input end of the PLC-CPU module (10); the output end of the PLC-CPU module (10) is connected to the input end of the PLC-DI / DQ module (11); the output end of the PLC-DI / DQ module (11) is connected to the input end of the PLC-DQ module (12); the output end of the PLC-DQ module (12) is connected to the socket (13); The socket (13) is connected to the temperature control switch (14).

7. The electric control system of the load-bearing floor of a gate for a nuclear power plant according to claim 1, characterized in that, The AC contactor (19) is connected to the terminal block (20).

8. The electronic control system for the load-bearing floor of a gate used in a nuclear power plant according to claim 1, characterized in that, When controlling the flipping floor, the flipping action of the flipping floor is selected to be driven by an electric hoist with its own control box, and is transmitted to the electric hoist control box through the contact state of the small relay (18) to achieve control; Control commands are given through the illuminated pushbutton (2), the two-position switch (3), the three-position switch (4), and the key switch (5). External signals are collected through the PLC-CPU module (10), the PLC-DI / DQ module (11), and the PLC-DQ module (12). Finally, a high-level signal is output to control the corresponding relay to turn on, realizing the up and down movement of the hook of the electric hoist, and achieving the synchronous control of the electric hooks of the two electric hoists.

9. The electric control system of the load-bearing floor of a gate for a nuclear power plant according to claim 1, characterized in that, When performing the translation action of the translation floor, it is driven by the translation floor motor; the forward and reverse rotation control is realized through the contactor in the load-bearing floor control cabinet, and the overload protection of the motor is realized by the motor protector; Control commands are given through the illuminated pushbutton (2), the two-position switch (3), the three-position switch (4), and the key switch (5). External signals are collected through the PLC-CPU module (10), the PLC-DI / DQ module (11), and the PLC-DQ module (12). Finally, a high-level signal is output to control the corresponding contactor. The closing of the main contact of the corresponding contactor changes the phase sequence of the stator winding connected to the motor, thereby realizing the forward and reverse rotation control; the opening and closing of the motor brake. The rectifier block power supply for the brake of the translation motor is 380V. In the wiring box of the translation floor motor, any two of the three-phase stator windings connected to the translation floor motor are connected to the power supply connection of the rectifier block, which can ensure that the opening and closing of the brake are powered on simultaneously with the three-phase stator winding of the translation floor motor to ensure the normal operation of the translation floor motor.

10. The electric control system for the load-bearing floor of a gate used in a nuclear power plant according to claim 1, characterized in that, When performing an emergency stop operation, the supply coil voltage of all contactors is cut off, causing the contactor coil to lose power and the main contact to open, cutting off the power supply to the electric hoist and the translation floor motor, realizing the emergency stop.

Images