CN219086648U

CN219086648U - Preassembled box transformer substation assembly structure

Info

Publication number: CN219086648U
Application number: CN202121780980.3U
Authority: CN
Inventors: 贺伟航; 李金珠; 隽佳
Original assignee: Shenyang Rifeng Chengkong Electrical Manufacturing Co ltd
Current assignee: Shenyang Rifeng Chengkong Electrical Manufacturing Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2023-05-26
Anticipated expiration: 2031-08-02

Abstract

Preassembled box transformer substation assembly structure belongs to the technical field of power distribution, and particularly relates to preassembled box transformer substation assembly structure. The utility model provides a preassembled box transformer substation assembly structure with good use effect. The utility model comprises a box body, wherein a high-voltage chamber (102), a transformer chamber and a control chamber are arranged in the box body, and is characterized in that a transformer (1) is arranged in the transformer chamber, and a ring main unit (2) is arranged in the high-voltage chamber (102); the two boxes are arranged transversely, a first control chamber (103), a first transformer chamber (104) and a second transformer chamber (105) are sequentially arranged on the front side box from front to back, and a second control chamber (100), a third transformer chamber (101) and a high-voltage chamber (102) are sequentially arranged on the rear side box from front to back.

Description

Preassembled box transformer substation assembly structure

Technical Field

The utility model belongs to the technical field of power distribution, and particularly relates to a preassembled box transformer substation assembly structure.

Background

The shield tunneling machine is a special engineering machine for tunneling, integrates light, machine, electricity, liquid, sensing and information technologies, and has the functions of excavating and cutting soil body, conveying soil residue, assembling tunnel lining, measuring, guiding and correcting errors and the like. Shield tunneling machines are widely used in subway, railway, highway, municipal, hydroelectric and other tunnel engineering. The shield machine is generally used in tunnels, and is mostly used in warm, humid, muddy, shock-resistant and rugged environments with simple design.

The design of the shield machine transformer substation is generally suitable for a 6-meter shield machine, the box transformer capacity is only 2500KVA, and the conventional box transformer cannot meet the requirements of users along with continuous upgrading of shield machine equipment.

Disclosure of Invention

The utility model aims at the problems and provides a preassembled box transformer substation assembly structure with good use effect.

In order to achieve the purpose, the utility model adopts the following technical scheme that the utility model comprises a box body, a high-voltage chamber (102), a transformer chamber and a control chamber are arranged in the box body, and is characterized in that the transformer chamber is internally provided with a transformer (1), and a ring main unit (2) is arranged in the high-voltage chamber (102); the two boxes are arranged transversely, a first control chamber (103), a first transformer chamber (104) and a second transformer chamber (105) are sequentially arranged on the front side box from front to back, and a second control chamber (100), a third transformer chamber (101) and a high-voltage chamber (102) are sequentially arranged on the rear side box from front to back.

As a preferable scheme, the first control room (103) is divided into two intervals from front to back, and the front end of each interval is provided with a double door; three groups of double doors are respectively arranged at the front ends of the first transformer chamber (104) and the second transformer chamber (105) from front to back;

the second control room (100) is divided into three interval areas from front to back, the front end of each interval area is provided with a double door, and a plurality of mounting holes (3) are vertically and uniformly distributed on two sides of each interval area;

three groups of double doors are arranged at the front end of the third transformer room (101) from front to back; the front end of the high-pressure chamber (102) is provided with a double door.

As another preferable scheme, the bottom (10) of the box body is provided with a ventilation opening (51), fans (5) are arranged on two sides of the box body, a semi-U-shaped fan cover is covered on the outer side of the fans, the opening of the fan cover faces downwards, a dustproof sponge (50) is arranged in the fan cover, and a mesh plate is arranged at the opening of the fan cover.

As another preferred embodiment, the mesh size of the mesh plate of the present utility model is 10mm×10mm.

As another preferable scheme, fire extinguishers (6) are arranged in the first control room (103), the second control room (100) and the third transformer room (101).

As another preferable scheme, the fire extinguisher adopts the superfine dry powder automatic fire extinguishing device, a fire signal output port of the superfine dry powder automatic fire extinguishing device is connected with a control port of a wire inlet load switch, and the wire inlet load switch is connected with a wire inlet end of a ring main unit (2).

As another preferable scheme, the transformers in the first transformer room (104), the second transformer room (105) and the third transformer room (101) are all 2000KVA dry-type transformers.

As another preferable scheme, the box body adopts 8KD type open section steel.

As another preferable scheme, the box body is provided with a limit switch for detecting the opening and closing of the box door, a detection signal output port of the limit switch is connected with a control port of a wire inlet load switch, and the wire inlet load switch is connected with a wire inlet end of the ring main unit (2).

As another preferable scheme, the diameter of the mounting holes (3) is 9.2mm, and the distance between the adjacent mounting holes (3) is 20mm.

As another preferable scheme, the second control room (100) is internally provided with a device mounting beam (20), and the mounting beam (20) is provided with a guide rail (21).

As another preferable scheme, the front end of the box body is provided with a box door, and the box door is provided with a toughened glass display window (4).

As another preferable scheme, a transformer temperature detection part (22) and a heat dissipation device (23) are arranged in the transformer room, a control signal input port of the heat dissipation device is connected with a control signal output port of a controller, and a signal transmission port of the controller is connected with a signal transmission port of a display control panel on a box door.

As another preferable scheme, the transformer temperature detection part (22) adopts a PT100 platinum resistor, and the PT100 platinum resistor is embedded in the dry-type transformer winding.

Secondly, the heat dissipation device (23) adopts six heat dissipation fans which are arranged on the transformer, and three heat dissipation fans are arranged in front of and behind the transformer respectively.

In addition, the controller of the utility model adopts an LD-B10-10 type controller.

The utility model has the beneficial effects that.

The utility model divides the transformer into 3 groups and puts them into 2 boxes, and sets the control room and high-voltage room reasonably, to meet the demands of equipment capacity and space.

Drawings

The utility model is further described below with reference to the drawings and the detailed description. The scope of the present utility model is not limited to the following description.

FIG. 1 is a schematic view of the rear side case of the present utility model.

Fig. 2 is a schematic view of the front side case structure of the present utility model.

Fig. 3 is a bottom view of the fan housing of the present utility model.

Fig. 4 is a top view of the bottom of the case of the present utility model.

Fig. 5 is a top view of the rear side case of the present utility model.

Fig. 6 is a top view of the front side case of the present utility model.

Fig. 7 is a front view of the rear case of the present utility model.

Fig. 8 is a front view of the front side case of the present utility model.

Fig. 9 is a rear view of the rear case of the present utility model.

Fig. 10 is a rear view of the front side case of the present utility model.

Fig. 11 is a system diagram of the present utility model.

FIG. 12 shows a FIRE extinguisher control loop and a safety trip control loop, wherein MX is a break coil, SB 1-8 are emergency stop buttons, N1-2, 7-9 LIMIT are threshold switches, and N3-4, 10-11 FIRE are FIRE extinguisher linkage contacts. When fire or other emergency occurs, the corresponding contacts are closed, and the opening coil acts to open the incoming line cabinet.

Fig. 13 shows a transformer temperature monitoring control loop, wherein 29DK is a transformer temperature controller, 1-2 contacts are a temperature controller control power supply, 3-10 fan interfaces, 13-14 alarm interfaces, 15-16 trip interfaces, and 19-22 analog interfaces, when the transformer temperature exceeds a set value, 15-16 points are closed, 29KA1 relay acts, all low-voltage circuit breakers are cut off, and signals are transmitted to the background.

FIG. 14 shows a power monitoring system, wherein 11P1 is a multifunctional meter, 1-4 is a sampling voltage, 5-10 is a sampling current, 11-13 is a controller power supply, 34-35 relays are output points, the multifunctional meter (11) has functions of undervoltage, overvoltage and phase sequence monitoring protection besides displaying power parameters, when a certain power parameter exceeds a set value, 34-35 points are closed, 11KA1 relays act, all low-voltage circuit breakers are cut off, and signals are transmitted to the background.

Fig. 15 shows a safety protection control circuit, wherein 27KAU is a safety relay, A1-A2 is a relay power supply, 13-14, 23-24 are relay output interfaces, S11-S12, S21-S22 are relay forced output interfaces, S33-S34 are relay fault reset interfaces, and when the control circuit fails, 13-14, 23-24 contacts are closed to cut off all low voltage circuit breakers, and after failure release, the safety relay needs to be manually restored.

Fig. 16, 17 and 18 show leakage protection control loops, wherein 25GF is a residual current controller capable of monitoring 4 loops, 12-13 is a power supply, 34-41 is a relay output interface, 1-5 is a residual current transformer interface, each low voltage molded case circuit breaker is configured with a residual current transformer, a voltage loss coil is mounted in the molded case, and when a certain circuit breaker is subject to leakage, a leakage signal is transmitted to the controller through the residual current transformer, and the corresponding molded case circuit breaker is cut off in response to the relay action.

Fig. 19 to 23 show remote I/O modules, 2 groups of 32-bit I/O modules (31 A3 to 4) are selected according to actual requirements of field devices, and a molded case circuit breaker, a micro-break, an electric leakage alarm signal, a transformer temperature alarm signal and the like in the box transformer are transmitted to the background.

Detailed Description

As shown in the figure, the preassembled box transformer assembling structure can be applied to preassembled box transformer, the preassembled box transformer comprises a box body and a control circuit, a high-voltage chamber (102), a transformer chamber and a control chamber are arranged in the box body, a transformer (1) is arranged in the transformer chamber, and a ring main unit (2) is arranged in the high-voltage chamber (102);

the control circuit comprises a primary system part, a fire extinguisher and safety tripping control loop, a transformer temperature control loop, an electric energy monitoring part, a protection control loop, a leakage protection module and a remote I/O module, wherein the power ports of the fire extinguisher and the safety tripping control loop are respectively connected with the power ports of the electric energy monitoring part, the protection control loop, the leakage protection module and the remote I/O module, the feedback signal output port of the primary system part is connected with the feedback signal input port of the remote I/O module, the control signal output port of the transformer temperature control loop is connected with the control signal input port of the leakage protection module, the control signal output port of the electric energy monitoring part is connected with the control signal input port of the leakage protection module, the control signal output port of the protection control loop is connected with the control signal input port of the fire extinguisher and the safety tripping control loop, and the feedback signal output port of the leakage protection module is connected with the feedback signal input port of the remote I/O module.

The two boxes are arranged transversely, a first control chamber (103), a first transformer chamber (104) and a second transformer chamber (105) are sequentially arranged on the front side box from front to back, and a second control chamber (100), a third transformer chamber (101) and a high-voltage chamber (102) are sequentially arranged on the rear side box from front to back.

The first control room (103) is divided into two intervals from front to back, and the front end of each interval is provided with a double door; three groups of double doors are respectively arranged at the front ends of the first transformer chamber (104) and the second transformer chamber (105) from front to back;

The novel dust-proof box is characterized in that a ventilation opening (51) is formed in the bottom (10) of the box, fans (5) are arranged on two sides of the box, a semi-U-shaped fan cover is covered on the outer side of the fans, the opening of the fan cover faces downwards, dust-proof sponge (50) is arranged in the fan cover, and a mesh plate is arranged at the opening of the fan cover.

The mesh size of the mesh plate is 10mm×10mm.

Fire extinguishers (6) are arranged in the first control room (103), the second control room (100) and the third transformer room (101).

The fire extinguisher adopts an ultrafine dry powder automatic fire extinguishing device, a fire signal output port of the ultrafine dry powder automatic fire extinguishing device is connected with a control port of a wire inlet load switch, and the wire inlet load switch is connected with a wire inlet end of a ring main unit (2).

The transformers in the first transformer room (104), the second transformer room (105) and the third transformer room (101) are all 2000KVA dry-type transformers.

The box body adopts 8KD type open section steel.

The box body is provided with a limit switch for detecting the opening and closing of the box door, a detection signal output port of the limit switch is connected with a control port of the incoming line load switch, and the incoming line load switch is connected with an incoming line end of the ring main unit (2).

The diameter of each mounting hole (3) is 9.2mm, and the distance between every two adjacent mounting holes (3) is 20mm.

The second control room (100) is internally provided with a device mounting beam (20), and the mounting beam (20) is provided with a guide rail (21).

The residual current controller 7, the safety relay 8, the I/O module 9, the molded case circuit breaker 12, the WeChat circuit breaker 13, the residual current detector 14, the intermediate relay 15, the switching power supply 16, the wiring terminal 17, the isolating switch fuse set 18 and the dual power supply 19 are arranged on the mounting beam (20).

The front end of the box body is provided with a box door, and the box door is provided with a toughened glass display window (4).

The transformer room is internally provided with a transformer temperature detection part (22) and a heat dissipation device (23), a control signal input port of the heat dissipation device is connected with a control signal output port of a controller, and a signal transmission port of the controller is connected with a signal transmission port of a display control panel on a box door.

And once the temperature is found to exceed the alarm limit, the power supply is cut off to give an alarm. The controller sends a control signal to the incoming line load switch, the load switch trips, and the alarm is given out through the panel.

The transformer temperature detection part (22) adopts a PT100 platinum resistor, and the PT100 platinum resistor is embedded in the dry-type transformer winding.

Six heat dissipation fans are adopted by the heat dissipation device (23), and are arranged on the transformer, and three heat dissipation fans are arranged in front of and behind the transformer respectively.

The controller adopts an LD-B10-10 type controller.

The primary system part comprises frame breakers 05Q 1-05Q 4, one end of a lower-stage distribution box MCC02 (a primary loop is a single line diagram, two lines connected with the MCC02 in the figure, each line represents 3 live wires) is respectively connected with a first voltmeter, a first ammeter, one end of a first transformer and one end of the frame breaker 05Q3 through the frame breaker 05Q1, the other end of the lower-stage distribution box MCC02 is respectively connected with a second voltmeter, a second ammeter, one end of a second transformer and one end of the frame breaker 05Q4 through the frame breaker 05Q2, the other end of the frame breaker 05Q3 is connected with one end of the lower-stage distribution box MCC03, and the other end of the frame breaker 05Q4 is connected with the other end of the lower-stage distribution box MCC 03; 05Q 1-05Q 4 provides power for the lower-level distribution box.

The other end of the first transformer is respectively connected with one end of the main switch, one end of the switch V2 and one end of the switch V3 through the switch V1, and the other end of the switch V2 is connected with the other end of the second transformer;

the other end of the V3 is connected with one end of a third transformer, a first connector at the other end of the third transformer is respectively connected with one end of a third voltmeter, a third ammeter, a single-pole double-throw poking end, one end of a 13Q1, one end of a 13Q2, one end of a 13Q3 and one end of a 13Q4, and a second connector at the other end of the third transformer is respectively connected with one end of a fourth voltmeter, one end of a fourth ammeter, one end of a 17Q1 and one end of a 17Q 2;

the single-pole double-throw fixed end is respectively connected with a fifth voltmeter, a fifth ammeter, one end of a fuse and one end of a 15Q7, the other end of the fuse is connected with one end of a control transformer (24) (the control transformer (24) converts 380V voltage into 110V-0V-110V voltage and is used as a control loop power supply), the other end of the control transformer (24) is respectively connected with one end of a 15Q1, one end of a 15Q2 and one end of a 15Q3, the other end of the 15Q1 is connected with a PDE30, the other end of the 15Q2 is connected with a PDE31, the other end of the 15Q3 is connected with a PDE32, the other end of the 15Q7 is connected with an MCC10, the other end of the 13Q1 is connected with an MCC05, the other end of the 13Q2 is connected with a PDE11, the other end of the 13Q3 is connected with an MCC09, the other end of the 13Q4 is connected with an MCC08, the other end of the 17Q2 is connected with another end of the PDE 04.

13Q1-13Q4, 15Q1-15Q3, 15Q7, 17Q2, 17Q1 are molded case circuit breakers for providing power to the lower level distribution box. PDE30-PDE32, MCC10, MCC05, PDE11, MCC09, MCC08, MCC04, MCC01 are lower distribution boxes.

In the figure, PDE30 is connected to only one line, which represents 3 live wires, MCC02 box is a lower level distribution box, and the user needs 2 lines of wires, so that the line is 2 lines, and 3 live wires are each.

When the C cabinet is closed, the feeder cabinets V1 to V3 are electrified, when the V1 to V3 are closed, the corresponding three groups of transformers are electrified in a high-voltage measurement mode, meanwhile, the 10KV high voltage is converted into 0.4KV low voltage, the low-voltage side of the transformer is connected with a molded case circuit breaker and a frame switch, the switches provide power for a lower-stage distribution box, the lower-stage distribution box is electrified after any switch is closed, the current and the voltage of the transformer are monitored, an electric power meter is adopted, and the transformer is controlled in the figure to convert the 0.4KV power into 110V-0V-110V to provide power for the electric power meter.

The FIRE extinguisher and the safety tripping control loop comprise a brake separating coil MX (for controlling the turn-off of a wire inlet load switch), wherein one end of the MX is connected with 1L0 through a fuse, the other end of the MX is respectively connected with one end of a right emergency stop switch SB4 behind the SUB30, one end of a left emergency stop switch SB3 behind the SUB30, one end of a right emergency stop switch SB2 in front of the SUB30, one end of a left emergency stop switch SB1 in front of the SUB30, one end of a LIMIT switch N1# LIMIT of a door of an N1# SUB30 transformer, one end of a LIMIT switch N2# LIMIT of the door of the N2# SUB30, one end of a linkage point switch of the N3# SUB30 (a FIRE extinguisher body is provided with a FIRE guide cable, when FIRE extinguisher occurs, the FIRE guide cable is ignited, and at the moment, the FIRE extinguisher linkage point acts to cut off the wire inlet load switch) N3# FIRE RE one end, one end of a N4# SUB30 FIRE extinguisher linkage point switch N4# FIRE RE one end, one end of a right emergency stop switch SB8 behind the SUB31, one end of a left emergency stop switch SB7 behind the SUB31, one end of a right emergency stop switch SB6 in front of the SUB31, one end of a left emergency stop switch 31, one end of a front of the emergency stop switch SB5, one end of the FIRE switch 31, one end of a FIRE stop switch 1# 10, one end linkage point FIRE switch 2 FIRE switch linkage point and a FIRE switch linkage point switch;

the other end of the right emergency stop switch SB4 after the SUB30, the other end of the left emergency stop switch SB3 after the SUB30, the other end of the right emergency stop switch SB2 before the SUB30, the other end of the left emergency stop switch SB1 before the SUB30, the other end of the N1# SUB30 transformer room door LIMIT switch N1# LIMIT, the other end of the N2# SUB30 transformer room door LIMIT switch N2# LIMIT, the other end of the N3# SUB30 FIRE extinguisher linkage point switch N3# FIRE other end, the other end of the N4# SUB30 FIRE extinguisher linkage point switch N4# FIRE other end, the other end of the SUB31 rear right emergency stop switch SB8, the other end of the SUB31 rear left emergency stop switch SB7, the other end of the SUB31 front right emergency stop switch SB6, the other end of the SUB31 front left emergency stop switch SB5, the other end of the N7# SUB31 transformer room door LIMIT switch N7# LIMIT, the other end of the N8# SUB31 transformer room LIMIT switch N8# LIMIT, the other end of the N9# SUB31 transformer room LIMIT switch N9# LIMIT, the other end of the N10# SUB31 FIRE extinguisher linkage point switch N10# FIRE other end, and the other end of the N11# FIRE extinguisher linkage point switch 11# FIRE switch are connected to one end of the ring network.

The front, back, left and right positions of the scram switch are indicated, and 08SB1 to 08SB4 in the panel diagram are scram buttons. When safety problems occur on site, the emergency stop switches are arranged at the front, back, left and right positions, and the incoming line load isolating switch can be cut off at the first time to ensure that the box transformer substation is powered off integrally, namely, the emergency stop plays a role of cutting off a power supply, and the power supply of a primary loop is cut off. If the switch action is detected, the MX controls the whole power-off of the incoming line load isolating switch.

The temperature control loop of the transformer comprises transformer temperature controllers 29DK, 1 and 2 pins of 29DK are respectively and correspondingly connected with 1L20.2 and 1L20.1, 3 to 5 pins of 29DK are respectively and correspondingly connected with L ends of fans fan1 to fan3 (an assembly drawing reference numeral 23 is a heat dissipation fan and is arranged on the transformer, 3 pins are respectively and symmetrically connected with power supplies in a non-sequential manner, the N ends of fan1 to fan3 are connected with 6 pins of 29DK, 6 pins of 29DK are connected with fan4 to fan6 (the assembly drawing reference numeral 23 is a heat dissipation fan and is arranged on the transformer), 3 pins are respectively and symmetrically connected with N ends of fan4 to fan6 in a front-rear manner, the N ends of fan 23 are respectively and symmetrically connected with power supplies in a non-sequential manner, 15 pins 1L20.1 of 29DK are respectively connected with L ends of fan4 to fan6 in a non-sequential manner, and 16 pins of 29DK are connected with 1L20.2 through a relay 29KA1 control terminal.

The transformer temperature controller (10) adopts an LD-B10-10 type temperature controller.

The electric energy monitoring part comprises a multifunctional electric power meter (panel drawing reference numeral 11) 11P1, a 35 pin of the 11P1 is respectively connected with 13 pins of 1N0 and 11P1 through a control end of a relay 11KA1, a 34 pin of the 11P1 is respectively connected with 1L0 and one end of a fuse 11Q3, and the other end of the 11Q3 is connected with a 12 pin of the 11P 1; 11 pin 11 of 11P1 is grounded;

the pins 5 to 6 of the 11P1 are connected with an output port of a three-phase current transformer (detecting the current of the low-voltage side of the transformer), the pins 1 to 4 of the 11P1 are connected with three-phase electricity through a fuse 11Q1, and the three-phase electricity is grounded through a contactor 11Q2 and a surge protector 11PRD in sequence.

The multifunctional power meter adopts an APMD type power meter.

The protection control loop comprises safety relays (assembly drawing 8), wherein ports A1 and A2 of the 27 KAUs are respectively connected with ports 15L04 and 15N04 (A1 and A2 are power sources of the safety relays, 15L04 and 15N04 represent 110V power sources which are connected into the ports A1 and A2 and are actually transformed from control), 13 pins 1L0 of 27KAU and 23 pins SUB31 of 27KAU (the preassembled type box is changed into 2 products of 1 set, one box is called SUB30, the other box is called SUB 31), and the port S11 of 27KAU is sequentially connected with the port S12 of 27KAU through six emergency stop buttons (used for cutting off all low-voltage circuit breakers, the 6 emergency stops are not changed into boxes and are reserved for the site), and the port S21 of 27KAU is connected with the port S22 of 27KAU through the emergency stop buttons;

the S24 port of 27KAU is connected to SUB31, the 14 pin 18-1 of 27KAU (which is a signal to turn off all circuit breakers), the Y36 and Y37 ports of 27KAU are connected, and the S34 port of 27KAU is connected to the S33 port of 27KAU through switch 27SB 1.

The safety relay adopts a PILZ type relay.

The leakage protection module comprises residual current detectors 25GF and 26GF, L, N ports of the 25GF are correspondingly connected with 1L0 and 1N0 respectively, a J1 port of the 25GF is connected with 1L0 through a control terminal of the relay 25K1, a J2 port of the 25GF is connected with 1L0 through a control terminal of the relay 25K2, a COM port of the 25GF is connected with 1N0, a J3 port of the 25GF is connected with 1L0 through a control terminal of the relay 25K3, a J4 port of the 25GF is connected with 1L0 through a control terminal of the relay 25K4, and a COM port of the 25GF is connected with 1N0;

the ports I1, I2, I3 and I4 of 25GF are respectively connected with the CM1 port of 25GF through residual current transformer probes 13T1, 13T2, 13T3 and 13T 4;

the L, N port of 26GF is correspondingly connected with 1L0 and 1N0 respectively, the J1 port of 26GF is connected with 1L0 through the control end of a relay 26K1, the J2 port of 26GF is connected with 1L0 through the control end of a relay 26K2, the COM port of 26GF is connected with 1N0, and the J3 port of 26GF is connected with 1L0 through the control end of a relay 26K3, and the COM port of 26GF is connected with 1N0;

the I1, I2 and I3 ports of 26GF are respectively connected with the CM1 port of 26GF through residual current transformer probes 15T1, 17T1 and 17T 2;

1L0 is connected with one end of a controlled normally-closed switch of the protective relay 11KA1, one end of a controlled normally-closed switch of the relay 14KA1 and one end of a controlled normally-closed switch of the relay 12KA1 respectively through a controlled normally-open switch of the safety relay 27KAU and a controlled normally-closed switch of the transformer overtemperature protective relay 29KA1 in sequence;

the other end of the controlled normally-closed switch of the 11KA1 is respectively connected with one end of the controlled normally-closed switch of the relay 25K1, one end of the controlled normally-closed switch of the relay 25K2, one end of the controlled normally-closed switch of the relay 25K3 and one end of the controlled normally-closed switch of the relay 25K4, the other end of the controlled normally-closed switch of the relay 25K1 is respectively connected with one end of the 13UV1 and one end of the indicator lamp 18D1, and the other end of the 13UV1 is respectively connected with the other end of the 18D1 and 1N0;

the other end of the 25K2 controlled normally-closed switch is respectively connected with one end of the 13UV2 and one end of the indicator lamp 18D2, and the other end of the 13UV2 is respectively connected with the other end of the 18D2 and 1N0;

the other end of the 25K3 controlled normally-closed switch is respectively connected with one end of the 13UV3 and one end of the indicator lamp 18D3, and the other end of the 13UV3 is respectively connected with the other end of the 18D3 and 1N0;

the other end of the 25K4 controlled normally-closed switch is respectively connected with one end of the 13UV4 and one end of the indicator lamp 18D4, and the other end of the 13UV4 is respectively connected with the other end of the 18D4 and 1N0;

the other end of the controlled normally-closed switch of the 14KA1 is respectively connected with one end of the 15UV7 and one end of the indicator lamp 18D5 through the controlled normally-closed switch of the relay 26K1, and the other end of the 15UV7 is respectively connected with the other ends of the 1N0 and 18D 5;

the other end of the controlled normally-closed switch of the 12KA1 is respectively connected with one end of the controlled normally-closed switch of the relay 26K2 and one end of the controlled normally-closed switch of the relay 26K3, the other end of the controlled normally-closed switch of the relay 26K2 is respectively connected with one end of the 17UV1 and one end of the indicator lamp 18D6, and the other end of the 17UV1 is respectively connected with the other ends of the 1N0 and the 18D 6;

the other end of the controlled normally-closed switch of 26K3 is respectively connected with one end of the 17UV2 and one end of the indicator lamp 18D7, and the other end of the 17UV2 is respectively connected with the other ends of the 1N0 and 18D 7.

13UV1, 13UV2, 13UV3, 13UV4, 15UV7, 17UV1, 17UV2 are voltage-loss coils, and the circuit breakers 15Q1 to 15Q4, 15Q7, 17Q1, 17Q2 are controlled respectively, and when the loop voltage is too low for 1 time, the circuit breakers corresponding to the action of the voltage-loss coils are opened.

26GF is used to control 26K1, 26K2, 26K3 and is used in the same manner as 25K 1-25K 3.

The residual current detector adopts an ARCM type detector.

The remote I/O MODULE comprises a switching power supply 31U1 (alternating current 110V is converted into direct current 24V), the input end of the 31U1 is respectively connected with 1L0 and 1N0, and the output end of the 31U1 is connected with the power supply end of a CONTROL NET SINGLE MEDIA ADAPTOR MODULE (network adapter 1794-ACN 15);

the port 0 of the 31A3 is connected with the AO port of the transformer temperature controller 29DK, the port 17 of the 31A3 is respectively connected with the port 19 of the 31A3, the port 21 of the 31A3 and the COM port 29DK, the BO port 29DK is connected with the port 2 of the 31A3, and the CO port 29DK is connected with the port 4 of the 31A 3;

the port 0 of the 31A4 is connected with the AO port of the transformer temperature controller 46DK, the port 17 of the 31A4 is respectively connected with the port 19 of the 31A4, the port 21 of the 31A4 and the COM port 46DK, the BO port 46DK is connected with the port 2 of the 31A4, and the CO port 46DK is connected with the port 4 of the 31A 4;

the 6 port of the 31A4 is connected with the AO port of the transformer temperature controller 47DK, the 23 port of the 31A4 is respectively connected with the 25 port of the 31A4, the 27 port of the 31A4 and the COM port of the 47DK, the BO port of the 47DK is connected with the 8 port of the 31A4, and the CO port of the 47DK is connected with the 10 port of the 31A 4;

the port 0 of 31A1 is connected with a 17Q1-SED (CBM 01) switch, the port 17 of 31A1 is connected with a 26K2 MCC01 Ground fault trip switch, the port 1 of 31A1 is connected with a 05Q1-SDE (CBM 02Y) switch, the port 18 of 31A1 is connected with a 48KA1 48KA2 Ground fault trip switch, the port 2 of 31A1 is connected with a 05Q2-SDE (CBM 02D) switch, the port 19 of 31A1 is connected with a 05Q3-SDE (CBM 03Y) switch, the port 3 of 31A1 is connected with a 05Q4-SDE (CBM 03D) switch, the port 20 of 31A1 is connected with a 26K3 MCC04 Ground fault trip switch, the port 4 of 31A1 is connected with a 17Q2-SDE (CBM 04) switch, the port 21 of 31A1 is connected with a 25K1 MCC05 Ground fault trip switch, the port 22 of 31A1 is connected with a 25K3 MCC09 Ground fault trip switch, the port 6 of 31A1 is connected with a 16Q3-SDE (CBM 07) switch, the port 23 of 31A1 is connected with a 25K4 MCC08 Ground fault trip switch, the port 7 of 31A1 is connected with a 16Q4-SDE (CBM 08) switch, and the port 24 of 31A1 is connected with a 25K2 PDE11 Ground fault trip switch;

the port 0 of 31A2 is connected with the switch 20Q1-SDE (CBM 50-01), the port 17 of 31A2 is connected with the switch 24Q3-SDE (CBM 50-18), the port 1 of 31A2 is connected with the switch 21Q1-SDE (CBM 50-02), the port 18 of 31A2 is connected with the switch 24Q4-SDE (CBM 50-19), the port 2 of 31A2 is connected with the switch 21Q2-SDE (CBM 50-03), the port 19 of 31A2 is connected with the switch 24Q5-SDE (CBM 50-20), the port 3 of 31A2 is connected with the switch 21Q3-SDE (CBM 50-04), the port 4 of 31A2 is connected with the switch 21Q4-SDE (CBM 50-05), the port 5 of 31A2 is connected with the switch 22Q1-SDE (CBM 50-07), the port 6 of 31A2 is connected with the switch 22Q2 (CBM 50-08), and the port 7 of 31A2 is connected with the switch CBM 50-09.

The transformer temperature controller adopts an LD-B10-10 type temperature controller.

The switches 31A1,31A2 are connected for signal feedback.

31A0, 31A1,31A2, 31A3 and 31A4 belong to the PLC acquisition equipment, wherein 31A0 is a network adapter 1794-ACN15 used as a communication module, 31A1,31A2 is a digital quantity input module 1756-IB32 and 31A3,31A4 is an analog quantity input module 1756-IE16.

The utility model is suitable for an 8-meter shield machine and used as a preassembled box transformer with the transformer capacity reaching 6000 KVA.

The box transformer has the functions of convenient installation and disassembly, ventilation and corrosion prevention, transformer temperature monitoring, electrical monitoring, fire alarm and fire extinguishing and the like.

Under the condition of meeting the capacity of equipment, the 6000KVA transformer is divided into 3 groups of 2000KVA transformers and placed into 2 box transformers (1), so that the occupied space is small while the capacity of the equipment is met.

The ring main unit (2) is adopted as the incoming line, the 8KD type open section steel can be adopted as the framework, the two sides of the section steel are respectively provided with the mounting holes (3) with the modulus of 20mm and the phi of 9.2, the components are mounted on the mounting beam, the guide rail is mounted on the mounting beam, the components are convenient to mount, dismount and maintain, the whole assembly capability is strong, and the front panel is displayed and the glass display window (4) is toughened.

The ventilation design is at case change bottom punching press vent (51), and case change both sides add the fan and carry out forced draft, and outside adopts half U type structure to cover the fan, and the cavernosum has been put to inside, and the lower mouth adopts the netlike board to install, and this structure has played rain-proof, dirt-proof effect.

The whole box body can be sprayed by white paint with high glossiness, and RAL9010 is pure white or similar color. The metal surface is clean and has strong corrosion resistance.

The utility model selects the superfine dry powder automatic fire extinguisher (6), the fire extinguisher is arranged in each unit, the top end of the fire extinguisher is provided with a fire-guiding rope and a pair of normally open contacts, once the fire disaster happens, the fire extinguisher is opened by the fire-guiding rope to extinguish the fire, and meanwhile, the normally open points of the fire extinguisher are closed to send signals to the shunt coil of the incoming line load switch, and the high-voltage part is cut off immediately, so that the loss is reduced to the minimum.

The tank is divided into a high-pressure chamber (102), a transformer chamber and a control system unit, all of which must be placed separately from each other, i.e. ideally each with a respective area.

A group of ring main units are adopted in the high-voltage chamber (102), wherein a shunt coil is arranged in the wire inlet cabinet and is connected with limit switches on all cabinet doors of the transformer chamber and the low-voltage chamber, once someone opens the cabinet door or a safety baffle of the transformer chamber, the high-voltage part is immediately tripped and cut off, and meanwhile, an emergency stop button is arranged on the periphery of the box transformer, so that the high-voltage part can be cut off at any time. As shown in fig. 12.

The dry type transformer is installed in the transformer room, can produce higher heat when equipment is operated, and the temperature of real-time supervision transformer, and radiator unit reduces the temperature of transformer, adopts transformer temperature controller, and 6 external radiators of controller are used for reducing the transformer temperature, carries out real-time supervision through serial ports line to the transformer temperature, shows the temperature of transformer three-phase on the panel, can set up high temperature and superhigh temperature warning limit on the controller, will cut off the power and send the warning in case the discovery temperature surpasses the warning limit. As shown in fig. 13.

The control system unit is internally provided with an electric leakage and power supply display monitor and a safety protection module.

The multifunctional meter is used for electric energy display and monitoring, and mainly detects the output end of the transformer to display three-phase current, voltage, active power, reactive power, electroplating, harmonic wave and the like. As shown in fig. 14.

The safety protection module selects a safety relay, when the electric loop breaks down, all low-voltage circuit breakers trip immediately, and when no fault is released, the circuit breakers cannot be switched on again, so that further equipment damage is avoided. As shown in fig. 15.

The residual current controller is combined with the current transformer, once the line passing through the current transformer is leaked, the corresponding relay acts immediately, the main power supply of the loop is cut off, and meanwhile, the leakage current value is displayed on the module and an alarm is given. As shown in fig. 17.

The remote I/O module transmits the power quality to the background through communication at the fault position of each switch state in the box transformer substation, so that personnel management is reduced, and meanwhile, maintenance time is also shortened. As shown in fig. 18.

It should be understood that the foregoing detailed description of the present utility model is provided for illustration only and is not limited to the technical solutions described in the embodiments of the present utility model, and those skilled in the art should understand that the present utility model may be modified or substituted for the same technical effects; as long as the use requirement is met, the utility model is within the protection scope of the utility model.

Claims

1. The preassembled box transformer assembling structure comprises a box body, wherein a high-voltage chamber (102), a transformer chamber and a control chamber are arranged in the box body, and the preassembled box transformer assembling structure is characterized in that a transformer (1) is arranged in the transformer chamber, and a ring main unit (2) is arranged in the high-voltage chamber (102); the two boxes are arranged transversely, a first control chamber (103), a first transformer chamber (104) and a second transformer chamber (105) are sequentially arranged on the front side box from front to back, and a second control chamber (100), a third transformer chamber (101) and a high-voltage chamber (102) are sequentially arranged on the rear side box from front to back.

2. The preassembled box transformer substation assembly structure according to claim 1, characterized in that the first control room (103) is divided into two intervals from front to back, and a double door is arranged at the front end of each interval; three groups of double doors are respectively arranged at the front ends of the first transformer chamber (104) and the second transformer chamber (105) from front to back;

3. The preassembled box transformer substation assembly structure according to claim 1, wherein the bottom (10) of the box body is provided with ventilation openings (51), fans (5) are arranged on two sides of the box body, a semi-U-shaped fan cover is covered on the outer side of each fan, an opening of each fan cover faces downwards, dust-proof sponge (50) is arranged in each fan cover, and a net plate is arranged at the opening of each fan cover.

4. The preassembled transformer substation assembly structure according to claim 1, characterized in that fire extinguishers (6) are arranged in the first control room (103), the second control room (100) and the third transformer room (101).

5. The preassembled type box transformer substation assembly structure according to claim 4, wherein the fire extinguisher is an ultrafine dry powder automatic fire extinguishing device, a fire signal output port of the ultrafine dry powder automatic fire extinguishing device is connected with a control port of an incoming line load switch, and the incoming line load switch is connected with an incoming line end of the ring main unit (2).

6. The preassembled box transformer substation assembly structure according to claim 1, wherein a limit switch for detecting opening and closing of a box door is arranged on the box body, a detection signal output port of the limit switch is connected with a control port of a wire inlet load switch, and the wire inlet load switch is connected with a wire inlet end of the ring main unit (2).

7. The preassembled type box transformer substation assembly structure according to claim 1, wherein a device mounting beam (20) is arranged in the second control room (100), and a guide rail (21) is arranged on the mounting beam (20).

8. The preassembled box transformer substation assembly structure according to claim 1, wherein a box door is arranged at the front end of the box body, and a tempered glass display window (4) is arranged on the box door.

9. The preassembled transformer substation assembly structure according to claim 1, wherein a transformer temperature detection part (22) and a heat dissipation device (23) are arranged in the transformer room, a control signal input port of the heat dissipation device is connected with a control signal output port of the controller, and a signal transmission port of the controller is connected with a signal transmission port of a display control panel on the box door.

10. The preassembled transformer substation assembly structure according to claim 9, characterized in that the heat dissipating device (23) adopts six heat dissipating fans, which are arranged on the transformer, three in front and rear.