CN210490469U - Power supply loop of oil station for draught fan of unit - Google Patents
Power supply loop of oil station for draught fan of unit Download PDFInfo
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- CN210490469U CN210490469U CN201921581191.XU CN201921581191U CN210490469U CN 210490469 U CN210490469 U CN 210490469U CN 201921581191 U CN201921581191 U CN 201921581191U CN 210490469 U CN210490469 U CN 210490469U
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Abstract
The utility model discloses a unit draught fan forced draught blower oil station power supply circuit, fan oil station technical field has been related to, when having solved #1 (# 2) oil pump motor short-circuit fault, the ATS device results in reserve oil pump motor to lose the power and unable linkage, whole equipment outage problem, including first oil pump motor and second oil pump motor, still include the first power supply circuit of being connected with first oil pump motor respectively, the second power supply circuit of being connected with second oil pump motor, first power supply circuit and second power supply circuit insert I security protection MCC section and II security MCC sections of power respectively, all be provided with the lack of voltage looks protection device in first power supply circuit and the second power supply circuit. The utility model discloses ensured the operation of first oil pump motor and second oil pump motor, reduced the unable normal condition of linking of first oil pump motor and second oil pump motor, effectively reduced the condition of commissioning, fan outage, boiler unilateral operation for the operation of fan is safe and reliable more.
Description
Technical Field
The utility model belongs to the technical field of fan oil station technique and specifically relates to a unit draught fan forced draught blower oil station power supply loop is related to.
Background
The oil station is composed of an oil tank, an oil pump device, a cooler, an instrument, a pipeline, a valve and the like, is mainly used for supplying lubricating oil to friction parts such as a speed reducer, an induced draft fan, a blower, a driving motor bearing and the like in a thin oil circulating lubrication system of mechanical equipment such as metallurgy and power generation, and is an important component of auxiliary equipment. When the electric control cabinet works, an electric control cabinet which provides electric power for the gear pump is the heart and the power source of an oil station, so the quality of the electric control system directly influences the safety, stability and efficiency of the whole oil station.
When a power plant is in operation of a guiding blower and a blower, the power supply of oil pump motors of the #13 unit, the #14 unit guiding blower and the #1 blower oil station and the #2 blower oil station is originally designed to be respectively a security MCCA section and a security MCCB section of the #13 unit; the safety MCCA section and the safety MCCB section of the #14 unit are switched by ATS and then sent to the main power supply air switch QF1 in the on-site operation box, and then the air switch QM1 and the QM2 respectively supply power to the #1 oil pump motor and the #2 oil pump motor (refer to the attached figure 2).
The above prior art solutions have the following drawbacks: when the #1 (# 2) oil pump motor has a short-circuit fault, QM1 (QM 2) and QF1 trip at the same time, so that QM2 (QM 1) loses power, the ATS device causes the standby oil pump motor to lose power and cannot be linked, the #2 (# 1) oil pump motor cannot be linked normally and finally stops completely, the main machine of the guide fan and the blower trips, the whole equipment stops running, and the overall economic benefit is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a guarantee mainframe oil pump continuously moves, effectively reduces the unit draught fan forced draught blower oil station power supply loop that the host computer was put into operation situation, operation are reliable, safe economy.
The utility model discloses a can realize through following technical scheme:
unit draught fan forced draught blower oil station power supply circuit, including first oil pump motor and second oil pump motor, still including respectively with first power supply circuit that first oil pump motor is connected and the second power supply circuit that second oil pump motor is connected, first power supply circuit with second power supply circuit inserts I security protection MCC section of power and II security protection MCC sections of power respectively, first power supply circuit with all be provided with the voltage loss and lack looks protection device in the second power supply circuit.
Through adopting above-mentioned technical scheme, the difference with prior art lies in, first oil pump motor directly supplies power with I security personnel MCC section of power through first power supply circuit, the reserve power supply of first oil pump motor is realized to the interconnection of A section and the B section of I security personnel MCC section of power, second oil pump motor directly supplies power with II security personnel MCC section of power through second power supply circuit, the reserve power supply of second oil pump motor is realized to the interconnection of A section and the B section of II security personnel MCC section of power supplies power, the operation of first oil pump motor and second oil pump motor has been ensured, the unable normal condition of linkage of first oil pump motor and second oil pump motor has been reduced, effectively reduced the operation, the fan stops the fortune, the unilateral condition of operation of boiler, make the operation of fan safe and reliable more.
Further setting the following steps: and the first power supply loop and the second power supply loop are both connected with a leakage protector in series.
Through adopting above-mentioned technical scheme, when transshipping appears in first power supply circuit or second power supply circuit, the earth-leakage protector plays the effect of breaking off first power supply circuit or second power supply circuit, effectively reduces the harm of first oil pump motor and second oil pump motor.
Further setting the following steps: the voltage-loss and phase-loss protection device comprises a voltage-loss and phase-loss protection relay, and three-phase four wires of the first power supply loop and the second power supply loop are respectively coupled with the ends L1, L2, L3 and N of the voltage-loss and phase-loss protection relay.
Through adopting above-mentioned technical scheme, L1, L2, L3, N end through the open-phase protection relay of decompression detect three phase current's four-wire respectively to compare three phase current's phase sequence and the open-phase protection relay of decompression interior input phase sequence, make first power supply circuit and second power supply circuit switch-on the same, different then make first power supply circuit and second power supply circuit disconnection, play the effect of protecting first oil pump motor and second oil pump motor.
Further setting the following steps: the input end of the first power supply loop and the input end of the second power supply loop are both connected with a DCS monitoring system, and the input end of a control loop of the DCS monitoring system is provided with a simply connected air switch.
Through adopting above-mentioned technical scheme, utilize DCS monitored control system to carry out real time monitoring to the operation and the off-state of first power supply circuit and second power supply circuit, the staff of being convenient for examines two return circuits fast, and simply allies oneself with air switch is convenient for break off two DCS monitored control systems and is connected with first power supply circuit and second power supply circuit respectively, is convenient for electrify again DCS for inspection work is safer.
Further setting the following steps: and a contactor switch and an indicator lamp are arranged in a control loop of the DCS monitoring system.
Through adopting above-mentioned technical scheme, contactor switch is convenient for switch DCS monitored control system's control circuit's break-make, is convenient for overhaul DCS monitored control system, and the pilot lamp is convenient for observe DCS monitored control system's operating condition.
Further setting the following steps: first power supply circuit with all be provided with the thermocouple protector in the second power supply circuit, two the normally closed contact of thermocouple protector connect respectively in first oil pump motor with in the control circuit of second oil pump motor.
By adopting the technical scheme, when the first power supply loop and the second power supply loop are in phase failure operation, the loops generate heat, and after the thermocouple protector is heated, the bimetallic strip inside the thermocouple protector generates heat and deforms to break the circuit, so that the protection effect of the first power supply loop and the second power supply loop is achieved.
Further setting the following steps: and power input air switching devices are arranged at the input ends of the first power supply loop and the second power supply loop.
Through adopting above-mentioned technical scheme, the empty device of opening of power input can further reduce the overload condition of first oil pump motor and second oil pump motor for first oil pump motor and second oil pump motor are more stable in the working process.
Further setting the following steps: and the output ends of the first power supply loop and the second power supply loop are provided with power output air switching devices.
Through adopting above-mentioned technical scheme, when circuit fault appeared, the power output air switch device was convenient for break off first power supply circuit or second power supply circuit to the staff of being convenient for overhauls first power supply circuit or second power supply circuit.
To sum up, the utility model discloses a beneficial technological effect does:
(1) the power supply of the first oil pump motor is realized through the security MCC section of the power supply I and the first power supply loop, and the power supply of the second oil pump motor is realized through the security MCC section of the power supply II and the second power supply loop, so that the shunt power supply of the first oil pump motor and the second oil pump motor is realized, the condition that the first oil pump motor and the second oil pump motor cannot be normally linked with each other when a short circuit fault occurs to the first oil pump motor or the second oil pump motor is reduced, the running of a fan is ensured, and the whole circuit is safer and more stable;
(2) utilize A section and the B section of I security personnel MCC section of power to realize the stand-by power supply of first oil pump motor, the stand-by power supply of second oil pump motor is realized to II security personnel MCC section A sections and B section of power, has ensured the operation of first oil pump motor and second oil pump motor, has effectively reduced the condition of commissioning, fan outage, the unilateral operation of boiler for the operation of fan is safe and reliable more.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the overall structure of the prior art.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to the figure 1, for the utility model discloses a unit draught fan forced draught blower oil station power supply circuit, including first oil pump motor and second oil pump motor, first oil pump motor and second oil pump motor are M1 and M2 of drawing in the drawing respectively, still include the first power supply circuit of being connected with first oil pump motor respectively, the second power supply circuit of being connected with second oil pump motor, first power supply circuit and second power supply circuit insert I security protection MCC section of power and II security MCC sections of power respectively, the A section of first power supply circuit and I security MCC section of power, the B section is connected, the A section of second power supply circuit and II security MCC sections of power, the B section is connected. The section A and the section B of the MCC section are protected through a power supply I, the section A and the section B of the second power supply loop and the section B of the MCC section are used for supplying power for the first oil pump motor and the second oil pump motor respectively and independently, the defect that the first oil pump motor and the second oil pump motor cannot be linked due to the fact that an original power supply is switched through an ATS device is overcome, and when the first oil pump motor (the second oil pump motor) is effectively reduced in short-circuit tripping, the condition that the fan is stopped due to the fact that the second oil pump motor (the first oil pump motor) cannot be linked is caused.
All series connection has earth-leakage protector in first power supply loop and the second power supply loop, and earth-leakage protector is the RCD of picture show, and earth-leakage protector adopts DZ20L series, and three live wires and the zero line of two earth-leakage protector are connected with three live wires and zero line of first power supply loop and second power supply loop respectively. When the first power supply loop or the second power supply loop is overloaded, the leakage protector plays a role in disconnecting the first power supply loop or the second power supply loop, and damage to the first oil pump motor and the second oil pump motor is effectively reduced.
The first power supply loop and the second power supply loop are internally provided with a voltage-loss and phase-loss protection device, the voltage-loss and phase-loss protection device comprises a voltage-loss and phase-loss protection relay, the voltage-loss and phase-loss protection relay is 11XV1 and XV2 shown in the figure, and three-phase four wires of the first power supply loop and the second power supply loop are respectively coupled with ends L1, L2, L3 and N of the voltage-loss and phase-loss protection relay. The four-line detection method comprises the steps that the four lines of a three-phase power supply are detected through the L1, the L2, the L3 and the N ends of a voltage-loss and phase-loss protection relay respectively, the phase sequence of the three-phase power supply is compared with the input phase sequence in the voltage-loss and phase-loss protection relay, a first power supply circuit and a second power supply circuit are switched on in the same mode, the first power supply circuit and the second power supply circuit are switched off in different modes, and the effect of protecting a first oil pump motor and a second oil pump motor is achieved.
The input end of the first power supply loop and the input end of the second power supply loop are both connected with a DCS monitoring system, and the DCS monitoring system is provided with a local button and a remote button. The local button and the remote button are convenient for realizing local control operation and remote control operation. The input end of a control loop of the DCS monitoring system is provided with single-connection air switches which are QF4 and 22QF4 shown in the drawing. The operation and the stop state of the first power supply loop and the second power supply loop are monitored in real time by the aid of the DCS monitoring systems, workers can check the two loops quickly, the single-connection air switch is convenient to disconnect the two DCS monitoring systems from being connected with the first power supply loop and the second power supply loop respectively, and the DCS is convenient to be electrified again, so that the checking work is safer.
Contactor switches (shown as KM1 and KM 2) and indicator lamps (HL 1 and HL 2) are arranged in a control loop of the DCS monitoring system. The contactor switch is convenient for switch the break-make of DCS monitored control system's control circuit, is convenient for overhaul DCS monitored control system, and the pilot lamp is convenient for observe DCS monitored control system's operating condition.
Thermocouple protectors are arranged in the first power supply circuit and the second power supply circuit, and normally closed contacts (shown as QN1 and QN 2) of the two thermocouple protectors are connected in control circuits of the first oil pump motor and the second oil pump motor respectively. When the first power supply loop and the second power supply loop are in phase failure operation, heat is generated in the loops, and after the thermocouple protector is heated, the bimetallic strip inside the thermocouple protector generates heat and deforms and breaks the circuit, so that the protection effect of the first power supply loop and the second power supply loop is achieved.
The input ends of the first power supply loop and the second power supply loop are respectively provided with a power supply input air switch device, and the power supply air switch devices are QF1 and QF2 shown in the figure. The power input air-open device can further reduce the overload condition of the first oil pump motor and the second oil pump motor, so that the first oil pump motor and the second oil pump motor are more stable in the working process.
The output ends of the first power supply loop and the second power supply loop are respectively provided with a power supply output idle opening device, and the power supply output idle opening devices are KN1 and KN2 shown in the figure. When circuit fault occurs, the power output air switch device is convenient for disconnecting the first power supply loop or the second power supply loop, so that a worker can conveniently overhaul the first power supply loop or the second power supply loop.
The implementation principle and the beneficial effects of the embodiment are as follows:
the first oil pump motor directly supplies power to the power supply I security MCC section through the first power supply loop, the second oil pump motor directly supplies power to the power supply II security MCC section through the second power supply loop, the power distribution condition of the first power supply loop and the second power supply loop is adjusted through the power input air opening device and the power output air opening device, the DCS monitoring system is regulated to be controlled on site, so that the workers can conveniently regulate the first power supply circuit and the second power supply circuit on site, and the first oil pump motor and the second oil pump motor are independently powered, when the first oil pump motor (the second oil pump motor) is short-circuited and disconnected, the second oil pump motor (the first oil pump motor) can still be normally linked, the conditions of commissioning, fan shutdown and unilateral operation of the security MCC section (security MCC section II) of the power supply I are effectively reduced, and the fan is safer and more reliable to operate.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. Unit draught fan forced draught blower oil station power supply loop, its characterized in that: including first oil pump motor and second oil pump motor, still include respectively with first power supply circuit that first oil pump motor is connected and the second power supply circuit that second oil pump motor is connected, first power supply circuit with second power supply circuit inserts I security protection MCC section of power and II security protection MCC sections respectively, first power supply circuit with all be provided with the voltage loss and lack the protection device of looks in the second power supply circuit.
2. The unit draught fan blower oil station power supply loop of claim 1, wherein a leakage protector is connected in series in both the first power supply loop and the second power supply loop.
3. The unit induced draft fan blower oil station power supply circuit of claim 1, wherein the no-voltage and no-phase protection device comprises a no-voltage and no-phase protection relay, and the three-phase four wires of the first power supply circuit and the second power supply circuit are respectively coupled with the ends L1, L2, L3 and N of the no-voltage and no-phase protection relay.
4. The unit draught fan blower oil station power supply loop of claim 1, wherein the input end of the first power supply loop and the input end of the second power supply loop are both connected with a DCS monitoring system, and the input end of a control loop of the DCS monitoring system is provided with a simply connected air switch.
5. The unit draught fan blower oil station power supply circuit of claim 4, wherein a contactor switch and an indicator light are arranged in the control circuit of the DCS monitoring system.
6. The unit draught fan blower oil station power supply circuit as claimed in claim 1, wherein thermocouple protectors are disposed in the first power supply circuit and the second power supply circuit, and normally closed contacts of the two thermocouple protectors are connected to control circuits of the first oil pump motor and the second oil pump motor respectively.
7. The unit draught fan blower oil station power supply loop of claim 1, wherein the input ends of the first power supply loop and the second power supply loop are provided with power input air opening devices.
8. The unit draught fan blower oil station power supply loop of claim 1, wherein the output ends of the first power supply loop and the second power supply loop are provided with power output air opening devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921581191.XU CN210490469U (en) | 2019-09-20 | 2019-09-20 | Power supply loop of oil station for draught fan of unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921581191.XU CN210490469U (en) | 2019-09-20 | 2019-09-20 | Power supply loop of oil station for draught fan of unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210490469U true CN210490469U (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921581191.XU Active CN210490469U (en) | 2019-09-20 | 2019-09-20 | Power supply loop of oil station for draught fan of unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210490469U (en) |
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2019
- 2019-09-20 CN CN201921581191.XU patent/CN210490469U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430080 Sujiawan, Qingshan District, Wuhan City, Hubei Province Patentee after: Guoneng Changyuan Wuhan Qingshan Thermal Power Co.,Ltd. Address before: 430080 Sujiawan, Qingshan District, Wuhan City, Hubei Province Patentee before: Guodian Qingshan Thermal Power Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |