CN215292787U - Emergency starting device of diesel oil water supply pump - Google Patents
Emergency starting device of diesel oil water supply pump Download PDFInfo
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- CN215292787U CN215292787U CN202121627958.5U CN202121627958U CN215292787U CN 215292787 U CN215292787 U CN 215292787U CN 202121627958 U CN202121627958 U CN 202121627958U CN 215292787 U CN215292787 U CN 215292787U
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Abstract
The utility model relates to a diesel oil water supply pump control field especially relates to an emergent starting drive of diesel oil water supply pump. The utility model provides an emergent starting drive of diesel oil working shaft, include, the water tank, first working shaft, the second working shaft, the third working shaft, the fourth working shaft, the diesel pump, pressure transmitter, electromagnetic flowmeter, water tank one end is provided with five outlet pipes, be provided with first working shaft on five outlet pipes respectively, the second working shaft, the third working shaft, fourth working shaft and diesel pump, five outlet pipe other ends are connected to a water header pipe, pressure transmitter and electromagnetic flowmeter have set gradually on the water header pipe. The utility model adopts the above structure after, guaranteed when meeting system water supply pressure, flow suddenly drop, even the station has a power failure or the water pump is not whole to be shut down or because of electric fault water pump switch does not break off, the diesel pump still can be from opening, guarantee blast furnace system even running.
Description
Technical Field
The utility model relates to a diesel oil water supply pump control field especially relates to an emergent starting drive of diesel oil water supply pump.
Background
At present, each water supply pump set of a blast furnace circulating water supply system is provided with a set of emergency diesel pump, and once the water supply pump set is completely stopped due to power failure of a pump station or other reasons, the diesel pump must be immediately started, so that the water safety for the blast furnace is ensured. Therefore, the self-starting interlocking of the diesel pump must be ensured to be reliable.
Normally closed auxiliary points of all power supply inlet cabinet switches of a series station are used as starting sources of diesel oil pumps for self starting, when the whole station loses power, all the auxiliary points of a loop are closed, and the diesel oil pumps are started. However, in order to avoid the voltage fluctuation of the station, the fault caused by tripping of the incoming line cabinet protection action is enlarged, the low voltage protection of the incoming line cabinets of a plurality of stations is in an exit state, even if the power supply fluctuates or even loses power, the incoming line switch does not trip, the signal returns, and the diesel pump cannot be started automatically; in addition, when other systematic faults occur, the pump set is completely stopped or the water outlet valve is in fault, the water supply flow and the pressure drop are caused, and the diesel pump cannot be started automatically.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an emergent starting drive of diesel oil working shaft to above-mentioned problem.
The purpose of the utility model is realized like this: the utility model provides an emergent starting drive of diesel oil working shaft, include, the water tank, first working shaft, the second working shaft, the third working shaft, the fourth working shaft, the diesel pump, pressure transmitter, electromagnetic flowmeter, water tank one end is provided with five outlet pipes, be provided with first working shaft on five outlet pipes respectively, the second working shaft, the third working shaft, fourth working shaft and diesel pump, five outlet pipe other ends are connected to a water header pipe, pressure transmitter and electromagnetic flowmeter have set gradually on the water header pipe.
Further, the first water supply pump, the second water supply pump, the third water supply pump and the fourth water supply pump are electrically connected in series.
Further, the pressure transmitter and the electromagnetic flowmeter are electrically connected in series.
Further, the first water supply pump, the second water supply pump, the third water supply pump and the fourth water supply pump are electrically connected in parallel with the pressure transmitter and the electromagnetic flowmeter.
Furthermore, the first water supply pump, the second water supply pump, the third water supply pump, the fourth water supply pump, the pressure transmitter and the electromagnetic flowmeter are electrically connected with the diesel pump together.
The utility model has the advantages that: the utility model adopts the above structure after, guaranteed when meeting system water supply pressure, flow suddenly drop, even the station has a power failure or the water pump is not whole to be shut down or because of electric fault water pump switch does not break off, the diesel pump still can be from opening, guarantee blast furnace system even running.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a circuit connection diagram of the present invention.
The system comprises a water tank 1, a first water supply pump 2, a second water supply pump 3, a third water supply pump 4, a fourth water supply pump 5, a diesel pump 6, a pressure transmitter 7 and an electromagnetic flowmeter 8.
Detailed Description
When the blast furnace circulating water system can start timely water supply through the automatic interlocking of the emergency diesel pump under the condition that the electric pump is suddenly stopped due to faults, the following steps are ensured: 1. the diesel pump starts when all the water pumps of the pump set stop pumping, and 2, the diesel pump starts when the water supply pressure and the flow suddenly drop to a critical point.
All water pump stop signals of the water supply system are connected in series, and the pressure and flow low signals of the water supply system are connected in parallel and serve as starting signals of the diesel pump, so that safe water supply of the system is guaranteed.
1. The normally closed auxiliary points of all water pump switches are connected in series, the running states of the 4 water pumps are used as the starting conditions of the diesel engine, and the running states are connected in series in an electric control loop of the diesel engine and used as a first starting signal of the diesel pump; when all the water supply pumps stop operating, the normally closed point is restored to the on state, and the diesel pump is started.
2. Through setting up two data of pressure, flow low signal, flow pressure detects and the record through electromagnetic flowmeter and pressure transmitter, and specific model is decided according to the manufacturer, and the different models of manufacturer are also different, and pressure transmitter and electromagnetic flowmeter install on water pump total outlet pipe, establish ties the low signal that arrives with pressure transmitter and electromagnetic flowmeter measurement and regard as the second start signal of diesel pump to parallelly connected with first start signal.
As shown in the figure, normally closed auxiliary points of 1-4# water pump switches are connected in series, when 4 pump sets are completely stopped and 4 normally closed points are closed, a diesel pump starting loop is connected, and the diesel pump starts to supply water; when the flow pressure of the system is reduced to a critical point at the same time, the starting loop of the diesel pump is communicated, and the diesel pump starts to supply water.
Examples
The device is adopted for emergency starting of a diesel pump of a clean-loop water supply system of a blast furnace of a Tai steel energy power plant 4350.
The clean ring water supply system of the blast furnace circulating water pump room is provided with four water supply pumps and a diesel pump for supplying water to the blast furnace, wherein a 1#3# pump is powered by an I # power supply, a 2#4# pump is powered by an II # power supply, one pump is respectively arranged on two lines under the common condition, and a mode of two pumps is adopted. The 2#3 pump is started, and the 1#4 pump is standby. When the power supply I # is suddenly de-energized or the 3# pump suddenly fails, the 3# pump stops running and the 4# pump automatically starts in an interlocking manner; if the No. 4 pump fails to start, the main water supply pressure is lower than the critical value, and the diesel pump is automatically started. If the power supply I # and the power supply II # drop brake at the same time, 4 electric pumps are all in a stop state, and the diesel pump is started; if a switch normally-closed point of a certain electric pump breaks down, a diesel pump control loop cannot be closed, and at the moment, the pressure and the flow of a main pipe are simultaneously lower than the low limit value, the diesel pump starts to supplement water for the system.
The current actual measurement pressure value is 1.82Mpa, the flow value is 1817m3/h, and once the power failure or the electric pump failure causes the measurement pressure value to be lower than 1.0Mpa and the flow value to be less than 1000 m3/h (the program is internally set and can be changed according to the system requirements), the diesel pump can automatically start to replenish water for the system.
1. The normally closed auxiliary points of all the water pump switches are connected in series to serve as a first starting signal of the diesel pump; when all the water supply pumps stop operating, the normally closed point is restored to the on state, and the diesel pump is started.
2. The critical low point of the main pipe flow pressure is used as a second starting signal of the diesel pump, when the water outlet flow pressure of the main pipe of the water supply system reaches a critical low value, the starting loop of the diesel pump is switched on, and the diesel pump is started.
3. When the electric pump is stopped due to the power supply or mechanical failure of the motor of the water pump, the diesel pump is controlled to start to supply water for the system in an emergency manner by two parallel conditions of a normally closed auxiliary point of a switch of the electric pump and a low value of a water supply parameter.
The above description is only for the specific embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.
Claims (5)
1. An emergent starting drive of diesel oil working shaft which characterized in that: the water tank comprises a water tank, a first water supply pump, a second water supply pump, a third water supply pump, a fourth water supply pump, a diesel pump, a pressure transmitter and an electromagnetic flowmeter, wherein one end of the water tank is provided with five water outlet pipes, the five water outlet pipes are respectively provided with the first water supply pump, the second water supply pump, the third water supply pump, the fourth water supply pump and the diesel pump, the other ends of the five water outlet pipes are connected to a water outlet main pipe, and the water outlet main pipe is sequentially provided with the pressure transmitter and the electromagnetic flowmeter.
2. The emergency starting apparatus of a diesel water supply pump according to claim 1, wherein: the first water supply pump, the second water supply pump, the third water supply pump and the fourth water supply pump are electrically connected in series.
3. The emergency starting apparatus of a diesel water supply pump according to claim 1, wherein: the pressure transmitter and the electromagnetic flowmeter are electrically connected in series.
4. The emergency starting apparatus of a diesel water supply pump according to claim 1, wherein: the first water supply pump, the second water supply pump, the third water supply pump and the fourth water supply pump are electrically connected in parallel with the pressure transmitter and the electromagnetic flowmeter.
5. The emergency starting apparatus of a diesel water supply pump according to claim 1, wherein: the first water supply pump, the second water supply pump, the third water supply pump, the fourth water supply pump, the pressure transmitter and the electromagnetic flowmeter are electrically connected with the diesel pump together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121627958.5U CN215292787U (en) | 2021-07-18 | 2021-07-18 | Emergency starting device of diesel oil water supply pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121627958.5U CN215292787U (en) | 2021-07-18 | 2021-07-18 | Emergency starting device of diesel oil water supply pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215292787U true CN215292787U (en) | 2021-12-24 |
Family
ID=79522972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121627958.5U Active CN215292787U (en) | 2021-07-18 | 2021-07-18 | Emergency starting device of diesel oil water supply pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215292787U (en) |
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2021
- 2021-07-18 CN CN202121627958.5U patent/CN215292787U/en active Active
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