CN111786612A - Low-voltage and no-voltage delay incoming-power self-starting system for oil station - Google Patents
Low-voltage and no-voltage delay incoming-power self-starting system for oil station Download PDFInfo
- Publication number
- CN111786612A CN111786612A CN202010538533.0A CN202010538533A CN111786612A CN 111786612 A CN111786612 A CN 111786612A CN 202010538533 A CN202010538533 A CN 202010538533A CN 111786612 A CN111786612 A CN 111786612A
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- China
- Prior art keywords
- circuit
- voltage
- oil station
- starting
- main pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/028—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
Abstract
The invention discloses a low-voltage and no-voltage delay incoming power self-starting system for an oil station, which comprises a main circuit of the oil station, wherein the main circuit of the oil station comprises a main pump starting and stopping circuit, a standby pump low-voltage self-starting circuit and a fault circuit are connected to the main pump starting and stopping circuit in parallel, a power-off delay circuit is connected to the main pump starting and stopping circuit in parallel, the power-off delay circuit comprises a three-phase power supply protector JL-400, an auxiliary normally-open contact 97 of the power supply protector JL-400 is connected with a fuse FU of the main pump starting and stopping circuit, and an auxiliary normally-open contact 98 of the power supply protector JL-400. When the low-voltage/no-voltage fault occurs in the oil station, the fault time is less than or equal to 10S, and the power supply voltage recovers to be normal again, the contactor is automatically started, and the normal operation of a high-voltage fan cannot be influenced; when the failure time is more than 10S, the power supply voltage is not recovered to be normal, the contactor cannot be automatically started, the high-pressure fan can be stopped to run, and the bearing bush burning accident is prevented.
Description
Technical Field
The invention relates to the field of oil station main pump control, in particular to an oil station low-voltage and no-voltage delay incoming power self-starting system.
Background
The power system has many short-time faults such as lightning stroke, when the faults occur, the system voltage can be reduced and can be recovered to a normal voltage level in a short time, in addition, the power system can also cause the accident of short-time power supply interruption for users due to various fault reasons, and the power supply interruption time is very short. The faults are all instantaneous faults with short time, and after the faults disappear, the system voltage can be immediately restored to a normal level.
At present, areas in the jurisdiction of sintering plants have more high-pressure fan electrical equipment which are core equipment (such as bag-type dust removal, desulfurization, a main exhaust fan and the like), an oil station of a high-pressure fan is an important link, and a main pump of the oil station needs to keep normal operation due to process reasons. When faults such as short circuit and the like occur to large equipment, impact can be caused to a power grid, and therefore instantaneous low voltage or voltage loss of low-voltage equipment is achieved. Wherein, the desulfurization: once the oil station stops working due to the low-pressure and under-voltage/power-off oil pump, the bearing bush of the high-pressure fan is burnt at high temperature, so that the whole desulfurization system is seriously damaged, and great economic loss is caused. Therefore, a system for delaying power failure when the oil station loses voltage and is needed, and when low voltage power failure occurs in a short time, the high-pressure fan cannot be stopped to delay production.
Disclosure of Invention
In order to solve the defects mentioned in the background technology, the invention aims to provide a low-voltage and no-voltage delay power-on self-starting system of an oil station.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a system is started from to oil station low pressure, decompression time delay incoming call, including the oil station main circuit, the oil station main circuit includes that the main pump opens and stops the circuit, the main pump opens and stops parallelly connected reserve pump low pressure on the circuit and opens and start circuit and fault circuit, parallelly connected outage delay circuit on the circuit is opened and stopped to the main pump, outage delay circuit includes three-phase power supply protector JL-400, power supply protector JL-400's supplementary normally open contact 97 and main pump open and stop circuit fuse FU and be connected, power supply protector JL-400's supplementary normally open contact 98 is connected with two time relay KT1 and KT2 respectively.
Preferably, the main pump start-stop circuit comprises three-phase alternating currents L1, L2 and L3, the three-phase alternating currents L1, L2 and L3 are connected with a fuse FU through a knife switch QS, and a relay KH1, a relay KH2, an intermediate relay KA, a button switch SB1 and a contactor KM1 are sequentially arranged between the fuse FU and the three-phase alternating current N in series.
Preferably, the button switch SB1 is connected in parallel with a contactor KM1 and a time relay KT1, respectively, on the start/stop circuit of the main pump.
Preferably, the low-voltage self-starting circuit of the standby pump comprises a pressure control switch SP1 and a contactor KM2 which are arranged in series, the pressure control switch SP1 is connected with a front contact of a button switch SB1 on the main pump start-stop circuit, and the contactor KM2 is connected with a rear contact of a contactor KM1 on the pump start-stop circuit.
Preferably, the fault circuit comprises a pressure control switch SP2 and a liquid level control switch SL1 which are arranged in parallel, the pressure control switch SP2 and the liquid level control switch SL1 are respectively connected with a front contact of an intermediate relay KA on the main pump start-stop circuit, the other ends of the pressure control switch SP2 and the liquid level control switch SL1 are connected with the intermediate relay KA, and the intermediate relay KA on the fault circuit is connected with a rear contact of a contactor KM1 on the pump start-stop circuit.
Preferably, a time relay KT2 on the power-off delay circuit is connected in parallel with a stop button TA in the high-pressure fan operating box.
The invention has the beneficial effects that:
1. a three-phase power supply protector JL-400 is additionally arranged behind a main circuit fuse of an oil station, an auxiliary normally open contact of the three-phase power supply protector is matched with two power-off delay relays, an auxiliary contact of a time relay KT1 is connected in parallel with a start button in an auxiliary circuit, when the oil station has a low-voltage/voltage loss fault, namely the fault time is less than or equal to 10S, and the power supply voltage recovers to be normal again, a contactor is automatically started, the normal operation of a high-voltage fan cannot be influenced, the auxiliary contact of the time relay KT2 is connected in parallel with a stop button in an operation box of the high-voltage fan, when the oil station has the low-voltage/voltage loss fault, namely the fault time is more than 10S, and the power supply voltage does not recover to be normal, the contactor cannot be automatically started.
2. The original stop button is replaced by the emergency stop switch, and the normally closed contact of the fault relay KA is moved downwards, so that the contactor can be prevented from being started automatically after the original stop button is clicked/the fault action is finished.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a circuit diagram of a low-voltage, no-voltage delay self-starting system of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
As shown in figure 1, a system is started from to oil station low pressure, decompression time delay comes, including the oil station main circuit, the oil station main circuit includes that the main pump opens and stops the circuit, the main pump opens and stops parallelly connected reserve pump low pressure from opening circuit and fault circuit on the circuit, open and stop parallelly connected outage delay circuit on the circuit at the main pump, outage delay circuit includes three-phase power supply protector JL-400, the supplementary normally open contact 97 of power supply protector JL-400 opens circuit fuse FU with the main pump and is connected, the supplementary normally open contact 98 of power supply protector JL-400 is connected with two time relay KT1 and KT2 respectively.
The main pump opens and stops the circuit and includes three-phase alternating current L1, L2, L3, and three-phase alternating current L1, L2, L3 are connected with fuse FU through sword switch QS, and series connection has relay KH1, relay KH2, auxiliary relay KA, button switch SB1 and contactor KM1 in proper order between fuse FU and the three-phase alternating current N.
The button switch SB1 on the main pump start-stop circuit is respectively connected in parallel with a contactor KM1 and a time relay KT 1.
The low-voltage self-starting circuit of the standby pump comprises a pressure control switch SP1 and a contactor KM2 which are arranged in series, wherein the pressure control switch SP1 is connected with a front contact of a button switch SB1 on the main pump start-stop circuit, and the contactor KM2 is connected with a rear contact of a contactor KM1 on the pump start-stop circuit.
The fault circuit comprises a pressure control switch SP2 and a liquid level control switch SL1 which are arranged in parallel, the pressure control switch SP2 and the liquid level control switch SL1 are respectively connected with a front contact of an intermediate relay KA on the main pump start-stop circuit, the other ends of the pressure control switch SP2 and the liquid level control switch SL1 are connected with the intermediate relay KA, and the intermediate relay KA on the fault circuit is connected with a rear contact of a contactor KM1 on the pump start-stop circuit.
And a time relay KT2 on the power-off delay circuit is connected in parallel with a stop button TA in the high-pressure fan operating box.
In practical application, a partial circuit of the high-pressure fan oil station electric appliance box carries out installation work of the system, a three-phase power supply protector and two power-off delay relays are additionally arranged in the electric appliance box, a two-core shielding cable from the oil station electric appliance box to the high-pressure fan operation box is laid, and related contacts are connected through wires.
When the oil station has low pressure/loss fault:
firstly, if the fault time is less than or equal to 10S and the power supply voltage recovers to be normal again, the contactor is automatically started;
and secondly, if the fault time is more than 10S, the power supply voltage is not recovered to be normal, the contactor cannot be automatically started, the high-pressure fan can be stopped to run, and the bearing bush burning accident is prevented.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (6)
1. The utility model provides a system of starting oneself is come to oil station low pressure, decompression time delay, includes the oil station main circuit, the oil station main circuit includes that the main pump opens and stops the circuit, the main pump opens and stops parallelly connected reserve pump low pressure from opening circuit and fault circuit on the circuit, its characterized in that, opens and stops parallelly connected outage time delay circuit on the circuit at the main pump, outage time delay circuit includes three phase current protector JL-400, the supplementary normally open contact 97 of power protector JL-400 opens with the main pump and stops circuit FU and be connected, the supplementary normally open contact 98 of power protector JL-400 is connected with two time relay KT1 and KT2 respectively.
2. The system for self-starting the oil station low-voltage and voltage-loss delayed incoming call of claim 1, wherein the main pump start-stop circuit comprises three-phase alternating currents L1, L2 and L3, the three-phase alternating currents L1, L2 and L3 are connected with a fuse FU through a knife switch QS, and a relay KH1, a relay KH2, an intermediate relay KA, a button switch SB1 and a contactor KM1 are sequentially arranged between the fuse FU and the three-phase alternating current N in series.
3. The system for low-voltage and voltage-loss delay electric self-starting of the oil station of claim 2, wherein the button switch SB1 on the starting and stopping circuit of the main pump is respectively connected with a contactor KM1 and a time relay KT1 in parallel.
4. The system for self-starting the oil station under voltage and delaying power failure according to claim 1, wherein the backup pump low voltage self-starting circuit comprises a pressure control switch SP1 and a contactor KM2 which are arranged in series, the pressure control switch SP1 is connected with a front contact of a button switch SB1 on a main pump start-stop circuit, and the contactor KM2 is connected with a rear contact of a contactor KM1 on the pump start-stop circuit.
5. The system for self-starting under the condition of low voltage and delayed voltage loss of the oil station as claimed in claim 1, wherein the fault circuit comprises a pressure control switch SP2 and a liquid level control switch SL1 which are arranged in parallel, the pressure control switch SP2 and the liquid level control switch SL1 are respectively connected with a front contact of an intermediate relay KA on the main pump start-stop circuit, the other ends of the pressure control switch SP2 and the liquid level control switch SL1 are connected with an intermediate relay KA, and the intermediate relay KA on the fault circuit is connected with a rear contact of a contactor KM1 on the pump start-stop circuit.
6. The system for delaying self-starting of the oil station in the case of low voltage and no voltage according to claim 1, wherein a time relay KT2 on the power-off delay circuit is connected in parallel with a stop button TA in the high-pressure fan operating box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010538533.0A CN111786612A (en) | 2020-06-13 | 2020-06-13 | Low-voltage and no-voltage delay incoming-power self-starting system for oil station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010538533.0A CN111786612A (en) | 2020-06-13 | 2020-06-13 | Low-voltage and no-voltage delay incoming-power self-starting system for oil station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111786612A true CN111786612A (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010538533.0A Pending CN111786612A (en) | 2020-06-13 | 2020-06-13 | Low-voltage and no-voltage delay incoming-power self-starting system for oil station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111786612A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527031Y (en) * | 2002-02-09 | 2002-12-18 | 天津石油化工公司机械研究所 | Self-starter for low-voltage motor |
| EP2887539A2 (en) * | 2013-12-20 | 2015-06-24 | Valeo Systèmes De Contrôle Moteur | Drive system, method for controlling an inverter and associated computer program |
| CN108730746A (en) * | 2018-06-08 | 2018-11-02 | 济南重工股份有限公司 | A kind of circuit and its course of work of control high-low pressure Lubricating-oil Station low-lift pump delay working |
| CN208046205U (en) * | 2017-12-15 | 2018-11-02 | 金川集团股份有限公司 | It is a kind of with integrated protection for electric installation |
-
2020
- 2020-06-13 CN CN202010538533.0A patent/CN111786612A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527031Y (en) * | 2002-02-09 | 2002-12-18 | 天津石油化工公司机械研究所 | Self-starter for low-voltage motor |
| EP2887539A2 (en) * | 2013-12-20 | 2015-06-24 | Valeo Systèmes De Contrôle Moteur | Drive system, method for controlling an inverter and associated computer program |
| CN208046205U (en) * | 2017-12-15 | 2018-11-02 | 金川集团股份有限公司 | It is a kind of with integrated protection for electric installation |
| CN108730746A (en) * | 2018-06-08 | 2018-11-02 | 济南重工股份有限公司 | A kind of circuit and its course of work of control high-low pressure Lubricating-oil Station low-lift pump delay working |
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Application publication date: 20201016 |
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| RJ01 | Rejection of invention patent application after publication |