BPRT water supply pump power supply device for blast furnace water treatment

Abstract

The utility model relates to the technical field of iron and steel smelting, and particularly discloses a blast furnace water treatment BPRT water supply pump power supply device which comprises a power supply circuit module which comprises a circuit breaker QF1, a circuit breaker QF2, a circuit breaker QF31, a relay KM1, a relay KM2, an active watt hour meter and a soft starter. One end of the circuit breaker QF1 and one end of the circuit breaker QF2 are respectively connected with a power supply, the other end of the circuit breaker QF1 is connected with one end of a normally open contact of the relay KM1, the other end of the circuit breaker QF2 is connected with one end of a normally open contact of the relay KM2, and the other end of the normally open contact of the relay KM1 and the other end of the normally open contact of the relay KM2 are both connected with the input end of the soft starter; three-phase current terminals of the active electric meter are respectively connected with one end of a current transformer TA1, one end of a current transformer TA2 and one end of a current transformer TA3, three-phase voltage terminals of the active electric meter are respectively connected with one ends of three normally open contacts of a circuit breaker QF31, and the other ends of the three normally open contacts of the circuit breaker QF31 are connected with an input end of a soft starter.

Description

Technical Field

[0001] This application relates to the field of iron and steel smelting technology, specifically to a power supply device for a BPRT water supply pump in blast furnace water treatment. Background Technology

[0002] In the existing technology, 1350m 3 Blast furnace water treatment often requires the use of multiple BPRT water supply pumps, each powered by a single circuit. However, if the power supply to one pump fails, the others will be unable to start, causing a 1350m³ water outage. 3 Increased temperatures in the BPRT unit's power oil tank, gearbox bearings, blower bearings, motor bearings, and turbine clutch bearings in the blast furnace blower room can affect the safe operation of the equipment and easily lead to unit shutdowns or blast furnace shutdowns due to excessively high bearing temperatures. Summary of the Invention

[0003] The purpose of this application is to provide a power supply device for the BPRT water supply pump in blast furnace water treatment, in order to solve the problem of the existing 1350m 3 If one of the blast furnace's water supply pumps loses power, the other pumps will be unable to start, causing a 1350m³ power outage. 3 Increased temperatures in the BPRT unit's power oil tank, gearbox bearings, blower bearings, motor bearings, and turbine clutch bearings in the blast furnace blower room can affect the safe operation of the equipment and easily lead to unit shutdowns or blast furnace shutdowns due to excessively high bearing temperatures.

[0004] To achieve the above objectives, this application provides a power supply device for a BPRT (Blast Furnace Water Treatment) water supply pump, comprising: a power supply circuit module.

[0005] The power supply circuit module includes circuit breaker QF1, circuit breaker QF2, circuit breaker QF31, relay KM1, relay KM2, active energy meter, and soft starter;

[0006] One end of each of the circuit breakers QF1 and QF2 is connected to a power supply. The other end of the circuit breaker QF1 is connected to one end of the normally open contact of the relay KM1, and the other end of the circuit breaker QF2 is connected to one end of the normally open contact of the relay KM2. The other ends of the normally open contacts of the relays KM1 and KM2 are both connected to the input terminal of the soft starter.

[0007] The three-phase current terminals of the active energy meter are respectively connected to one end of the current transformers TA1, TA2, and TA3. The three-phase voltage terminals of the active energy meter are respectively connected to one end of the three normally open contacts of the circuit breaker QF31. The other end of the three normally open contacts of the circuit breaker QF31 is connected to the input terminal of the soft starter.

[0008] The output of the soft starter is connected to a three-phase AC motor.

[0009] Optionally, the other end of the current transformers TA1, TA2, and TA3 is grounded.

[0010] Optionally, the power supply circuit module further includes a relay KM, one end of which is connected to the input terminal of the soft starter, and the other end of which is connected to the output terminal of the soft starter.

[0011] Optionally, it also includes:

[0012] The control circuit module includes time delay relays KT1 and KT2, indicator lights HL1, HL11, HL2, and HL21.

[0013] One end of the normally closed contact of relay KM2 is connected to the circuit breaker QF1, the other end of the normally closed contact of relay KM2 is connected to one end of the normally closed contact of relay KM1, the other end of the normally closed contact of relay KM1 is connected to one end of the coil of time delay relay KT1, and the other end of the coil of relay KT1 is connected to the neutral wire.

[0014] Optionally, one end of the normally open contact of the time delay relay KT1 is connected to the circuit breaker QF1, the other end of the normally open contact of the time delay relay KT1 is connected to one end of the normally closed contact of the relay KM2, the other end of the normally closed contact of the relay KM2 is connected to one end of the coil of the relay KM1, and the other end of the coil of the relay KM1 is connected to the neutral wire.

[0015] Optionally, one end of the normally open contact of the relay KM1 is connected to the circuit breaker QF1, and the other end of the normally open contact of the relay KM1 is connected to the normally closed contact of the relay KM2 and one end of the indicator light HL1, respectively. The other end of the indicator light HL1 is connected to the neutral wire.

[0016] One end of the indicator light HL11 is connected to the circuit breaker QF1, and the other end of the indicator light HL11 is connected to the neutral wire.

[0017] Optionally, one end of the normally closed contact of relay KM1 is connected to the circuit breaker QF2, the other end of the normally closed contact of relay KM1 is connected to one end of the normally closed contact of relay KM2, the other end of the normally closed contact of relay KM2 is connected to one end of the coil of time delay relay KT2, and the other end of the coil of time delay relay KT2 is connected to the neutral wire.

[0018] Optionally, one end of the normally open contact of the time delay relay KT2 is connected to the circuit breaker QF2, the other end of the normally open contact of the time delay relay KT2 is connected to one end of the normally closed contact of the relay KM1, the other end of the normally closed contact of the relay KM1 is connected to one end of the coil of the relay KM2, and the other end of the coil of the relay KM2 is connected to the neutral wire.

[0019] Optionally, one end of the normally open contact of the relay KM2 is connected to the circuit breaker QF2, the other end of the normally open contact of the relay KM2 is connected to the normally closed contact of the relay KM1 and one end of the indicator light HL2, and the other end of the indicator light HL2 is connected to the neutral wire.

[0020] One end of the indicator light HL21 is connected to the circuit breaker QF2, and the other end of the indicator light HL21 is connected to the neutral wire.

[0021] The embodiments of this application have the following advantages:

[0022] Compared with existing technologies, the power supply device for the BPRT water supply pump in blast furnace water treatment provided by the above technical solution can realize the conversion of single-circuit to dual-circuit power supply, which not only improves the reliability of power supply, but also enhances the ability of electrical and instrumentation maintenance personnel to identify and solve problems, and reduces the workload of equipment management and maintenance. Specifically, dual power supply improves the reliability of power supply and reduces the occurrence of power outages. When one power supply fails during normal operation, the other contactor engages after a 3-second delay to continue supplying power to the soft starter QB01, ensuring normal power supply to the equipment and avoiding 1350m 3 The lack of cooling water in the two BPRT units in the blast furnace blower room caused unit shutdowns and blast furnace shutdowns. This eliminated the potential hazard of two BPRT units shutting down due to a power outage, ensuring the normal and safe operation of the blast furnace. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] Figure 1 A schematic diagram of the power supply circuit for a BPRT water supply pump power supply device for blast furnace water treatment is provided for at least one embodiment of this application;

[0025] Figure 2 A schematic diagram of the control circuit for a BPRT water supply pump power supply device for blast furnace water treatment, provided for at least one embodiment of this application. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0029] For the original BPRT water supply pump power supply device for blast furnace water treatment, the original single-circuit power supply before the renovation was that three-phase AC380V AC power was supplied to the soft starter QB01 through the isolating switch QS and the plastic circuit breaker Q01.

[0030] Remove the original disconnect switch, move the original plastic-cased circuit breaker (400A) upwards, and add another plastic-cased circuit breaker (400A) on the right side. At the same time, add two LC1D300A AC contactors in front of and behind the distribution cabinet.

[0031] After the upgrade, a dual-circuit power supply was implemented. Section I power flowed through plastic circuit breaker Q01 and contactor KM1, with the lower end of contactor KM1 connected to the same phase and then to the lower end of contactor KM2. Section II power flowed through plastic circuit breaker Q02 and contactor KM2, with the lower end of contactor KM2 connected to the same phase and then to the lower end of contactor KM1, supplying power to soft starter QB01. An additional power supply line was laid from the load center cabinet to the MCC cabinet, forming a dual-power input line. This line connected to the main circuit and control circuit, and after commissioning, the system was put into operation.

[0032] This application provides a modified BPRT water supply pump power supply device for blast furnace water treatment, referencing... Figures 1 to 2 ,include:

[0033] Power supply circuit module,

[0034] The power supply circuit module includes circuit breaker QF1, circuit breaker QF2, circuit breaker QF31, relay KM1, relay KM2, active energy meter, and soft starter;

[0035] One end of each of the circuit breakers QF1 and QF2 is connected to a power supply (connected to power supply segment I and power supply segment II respectively). The other end of the circuit breaker QF1 is connected to one end of the normally open contact of the relay KM1, and the other end of the circuit breaker QF2 is connected to one end of the normally open contact of the relay KM2. The other ends of the normally open contacts of relays KM1 and KM2 are both connected to the input terminal of the soft starter.

[0036] The three-phase current terminals (terminals 1, 4, and 7) of the active energy meter are respectively connected to one end of the current transformers TA1, TA2, and TA3. The three-phase voltage terminals (terminals 2, 5, and 8) of the active energy meter are respectively connected to one end of the three normally open contacts of the circuit breaker QF31. The other end of the three normally open contacts of the circuit breaker QF31 is connected to the input terminal of the soft starter.

[0037] The output of the soft starter is connected to a three-phase AC motor.

[0038] In some embodiments, the other end of the current transformers TA1, TA2, and TA3 is grounded.

[0039] In some embodiments, the power supply circuit module further includes a relay KM, one end of the normally open contact of the relay KM is connected to the input terminal of the soft starter, and the other end of the normally open contact of the relay KM is connected to the output terminal of the soft starter.

[0040] In some embodiments, the system further includes: a control circuit module, the control circuit module including time delay relay KT1, time delay relay KT2, indicator lights HL1, HL11, HL2, and HL21, wherein...

[0041] One end of the normally closed contact of relay KM2 is connected to the circuit breaker QF1, the other end of the normally closed contact of relay KM2 is connected to one end of the normally closed contact of relay KM1, the other end of the normally closed contact of relay KM1 is connected to one end of the coil of time delay relay KT1, and the other end of the coil of relay KT1 is connected to the neutral wire.

[0042] One end of the normally open contact of the time delay relay KT1 is connected to the circuit breaker QF1, the other end of the normally open contact of the time delay relay KT1 is connected to one end of the normally closed contact of the relay KM2, the other end of the normally closed contact of the relay KM2 is connected to one end of the coil of the relay KM1, and the other end of the coil of the relay KM1 is connected to the neutral wire.

[0043] One end of the normally open contact of relay KM1 is connected to the circuit breaker QF1, and the other end of the normally open contact of relay KM1 is connected to the normally closed contact of relay KM2 and one end of indicator light HL1, respectively. The other end of indicator light HL1 is connected to the neutral wire.

[0044] One end of the indicator light HL11 is connected to the circuit breaker QF1, and the other end of the indicator light HL11 is connected to the neutral wire.

[0045] One end of the normally closed contact of relay KM1 is connected to the circuit breaker QF2, the other end of the normally closed contact of relay KM1 is connected to one end of the normally closed contact of relay KM2, the other end of the normally closed contact of relay KM2 is connected to one end of the coil of time delay relay KT2, and the other end of the coil of time delay relay KT2 is connected to the neutral wire.

[0046] One end of the normally open contact of the time delay relay KT2 is connected to the circuit breaker QF2, the other end of the normally open contact of the time delay relay KT2 is connected to one end of the normally closed contact of the relay KM1, the other end of the normally closed contact of the relay KM1 is connected to one end of the coil of the relay KM2, and the other end of the coil of the relay KM2 is connected to the neutral wire.

[0047] One end of the normally open contact of relay KM2 is connected to the circuit breaker QF2, and the other end of the normally open contact of relay KM2 is connected to the normally closed contact of relay KM1 and one end of indicator light HL2. The other end of indicator light HL2 is connected to the neutral wire.

[0048] One end of the indicator light HL21 is connected to the circuit breaker QF2, and the other end of the indicator light HL21 is connected to the neutral wire.

[0049] The control principle of the modified BPRT water supply pump power supply device for blast furnace water treatment provided in this application includes: if stage I is powered on first, the time relay KT1 delays for 3 seconds, and the stage I power contactor KM1 is energized and engages to supply power to the soft starter QB01. The operator at the back-end position can start and control the BPRT water pump. The power supply principle of stage II is the same. Normally, there are two power supplies, and the contactors are interlocked. Whichever power supply is energized first, the contactor will engage to supply power. If the normally operating power supply line loses power, the other line delays for 3 seconds, and the contactor will engage to supply power to the BPRT water pump, thus improving the reliability of the power supply.

[0050] In summary, compared with existing technologies, the modified blast furnace water treatment BPRT water supply pump power supply device provided in this application can realize the conversion from single-circuit to dual-circuit power supply, which not only improves the reliability of power supply, but also enhances the ability of electrical and instrumentation maintenance personnel to identify and solve problems, reducing the workload of equipment management and maintenance. Specifically, dual power supply improves the reliability of power supply and reduces the occurrence of power outages. When one circuit fails during normal operation, the other contactor engages after a 3-second delay to continue supplying power to the soft starter QB01, ensuring normal power supply to the equipment and avoiding 1350m... 3 The lack of cooling water in the two BPRT units in the blast furnace blower room caused unit shutdowns and blast furnace shutdowns. This eliminated the potential hazard of two BPRT units shutting down due to a power outage, ensuring the normal and safe operation of the blast furnace.

[0051] Note that, unless otherwise explicitly stated, all features disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by alternative features for achieving the same, equivalent, or similar purpose. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features. Where used, "further," "preferably," "even further," and "more preferably" are simple starting points for describing another embodiment based on the foregoing embodiments, the combination of which with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment constitutes yet another embodiment.

[0052] In the implementation of functions and steps, the corresponding functions and steps in the various embodiments may occur in a different order than those shown. For example, two consecutive functions and steps may actually be executed or implemented substantially in parallel, and they may sometimes be executed or implemented in reverse order, depending on the functions involved.

[0053] Although this application has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this application fall within the scope of protection claimed in this application.

Claims

1. A power supply device for a BPRT water supply pump in blast furnace water treatment, characterized in that, include: Power supply circuit module, The power supply circuit module includes circuit breaker QF1, circuit breaker QF2, circuit breaker QF31, relay KM1, relay KM2, active energy meter, and soft starter; One end of each of the circuit breakers QF1 and QF2 is connected to a power supply. The other end of the circuit breaker QF1 is connected to one end of the normally open contact of the relay KM1, and the other end of the circuit breaker QF2 is connected to one end of the normally open contact of the relay KM2. The other ends of the normally open contacts of the relays KM1 and KM2 are both connected to the input terminal of the soft starter. The three-phase current terminals of the active energy meter are respectively connected to one end of the current transformers TA1, TA2, and TA3. The three-phase voltage terminals of the active energy meter are respectively connected to one end of the three normally open contacts of the circuit breaker QF31. The other end of the three normally open contacts of the circuit breaker QF31 is connected to the input terminal of the soft starter. The output of the soft starter is connected to a three-phase AC motor.

2. The power supply device for the BPRT water supply pump in blast furnace water treatment according to claim 1, characterized in that, The other end of the current transformers TA1, TA2, and TA3 is grounded.

3. The power supply device for the BPRT water supply pump in blast furnace water treatment according to claim 1, characterized in that, The power supply circuit module also includes a relay KM, one end of which is connected to the input terminal of the soft starter, and the other end of which is connected to the output terminal of the soft starter.

4. The power supply device for the BPRT water supply pump in blast furnace water treatment according to claim 1, characterized in that, Also includes: The control circuit module includes time delay relays KT1 and KT2, indicator lights HL1, HL11, HL2, and HL21. One end of the normally closed contact of relay KM2 is connected to the circuit breaker QF1, the other end of the normally closed contact of relay KM2 is connected to one end of the normally closed contact of relay KM1, the other end of the normally closed contact of relay KM1 is connected to one end of the coil of time delay relay KT1, and the other end of the coil of relay KT1 is connected to the neutral wire.

5. The power supply device for the BPRT water supply pump in blast furnace water treatment according to claim 4, characterized in that, One end of the normally open contact of the time delay relay KT1 is connected to the circuit breaker QF1, the other end of the normally open contact of the time delay relay KT1 is connected to one end of the normally closed contact of the relay KM2, the other end of the normally closed contact of the relay KM2 is connected to one end of the coil of the relay KM1, and the other end of the coil of the relay KM1 is connected to the neutral wire.

6. The power supply device for the BPRT water supply pump in blast furnace water treatment according to claim 5, characterized in that, One end of the normally open contact of relay KM1 is connected to the circuit breaker QF1, and the other end of the normally open contact of relay KM1 is connected to the normally closed contact of relay KM2 and one end of indicator light HL1, respectively. The other end of indicator light HL1 is connected to the neutral wire. One end of the indicator light HL11 is connected to the circuit breaker QF1, and the other end of the indicator light HL11 is connected to the neutral wire.

7. The power supply device for the BPRT water supply pump in blast furnace water treatment according to claim 6, characterized in that, One end of the normally closed contact of relay KM1 is connected to the circuit breaker QF2, the other end of the normally closed contact of relay KM1 is connected to one end of the normally closed contact of relay KM2, the other end of the normally closed contact of relay KM2 is connected to one end of the coil of time delay relay KT2, and the other end of the coil of time delay relay KT2 is connected to the neutral wire.

8. The power supply device for the BPRT water supply pump in blast furnace water treatment according to claim 7, characterized in that, One end of the normally open contact of the time delay relay KT2 is connected to the circuit breaker QF2, the other end of the normally open contact of the time delay relay KT2 is connected to one end of the normally closed contact of the relay KM1, the other end of the normally closed contact of the relay KM1 is connected to one end of the coil of the relay KM2, and the other end of the coil of the relay KM2 is connected to the neutral wire.

9. The power supply device for the BPRT water supply pump in blast furnace water treatment according to claim 8, characterized in that, One end of the normally open contact of relay KM2 is connected to the circuit breaker QF2, and the other end of the normally open contact of relay KM2 is connected to the normally closed contact of relay KM1 and one end of indicator light HL2. The other end of indicator light HL2 is connected to the neutral wire. One end of the indicator light HL21 is connected to the circuit breaker QF2, and the other end of the indicator light HL21 is connected to the neutral wire.

Images