CN203548161U - Device for keeping control position of scoop tube of feed pump - Google Patents
Device for keeping control position of scoop tube of feed pump Download PDFInfo
- Publication number
- CN203548161U CN203548161U CN201320739537.0U CN201320739537U CN203548161U CN 203548161 U CN203548161 U CN 203548161U CN 201320739537 U CN201320739537 U CN 201320739537U CN 203548161 U CN203548161 U CN 203548161U
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- scoop tube
- electromagnetic valve
- water pump
- keeping
- feed water
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000003921 oil Substances 0.000 claims description 29
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 101100408352 Drosophila melanogaster Plc21C gene Proteins 0.000 description 17
- 230000005540 biological transmission Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 238000006052 Horner reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The utility model discloses a device for keeping the control position of a scoop tube of a feed pump. The device is characterized by comprising a controller (10), a servo electromagnetic valve (20), a double-acting hydraulic oil cylinder (30), the scoop tube (40) and a position keeping electromagnetic valve (50). The controller (10) is connected with the servo electromagnetic valve (20) and the position keeping electromagnetic valve (50), the servo electromagnetic valve (20) is further connected with the double-acting hydraulic oil cylinder (30), the double-acting hydraulic oil cylinder (30) is connected with the scoop tube (40) to control the scoop tube (40) to operate, and the position keeping electromagnetic valve (50) receives command signals of the controller (10) to be used for stopping control of the servo electromagnetic valve (20) over hydraulic oil. The device is simple in implementation process and high in operability, the position keeping function on the scoop tube can be achieved, the position of the scoop tube before faults occur can be kept, and the operation reliability of a feeding system and the stability of a unit are improved.
Description
Technical field
The utility model relates to the device of scoop tube control position, particularly, relates to a kind of device of scoop tube control position of water supply pump.
Background technique
In electricity power enterprise, scoop tube is a part for fluid coupling, and at power plant's electrically driven feedpump, Main Function is to be that oily degree of filling in fluid coupling changes and makes final output torque produce respective change by changing scoop tube position.Fluid coupling is because structure is more complicated, major part all adopts oil return adjustment, aperture by scoop tube realizes the how many adjustment of recirculating oil quantity, mainly by the turnover of scoop tube, undertaken, submarginal oil pressure is high, and the low fuel pressure of central position, thereby change the size of recirculating oil quantity, realize the change of output power.Electrically driven feedpump scoop tube aperture be by servo electromagnetic valve D/P changeover control signal control the entering of double-act-ing hydraulic J-Horner, oil drain quantity number realize, if electrically driven feedpump scoop tube controller output order is delivered to the servo electromagnetic valve signal situation that breaks down, feed water pump scoop tube can recover initial, set position and (start zero rotating speed, be not with and exert oneself), cause feed water pump stall, aperture reduces, feed pump capacity back to zero, directly affect unit to water management, confluent is not enough, thereby bring out the action of the low triggering boiler of steam water-level main fuel trip, unit tripping.Therefore those skilled in the art need to increase and protect bit function electrically driven feedpump scoop tube.
Model utility content
The purpose of this utility model is to provide a kind of device, this device solves electrically driven feedpump scoop tube and delivers in controller output control command the problem that feed water pump scoop tube in servo electromagnetic valve signal fault situation can recover initial, set position, maintain fault eve scoop tube position, scoop tube is realized and protected bit function.
To achieve these goals, it is a kind of for keeping the device of the scoop tube control position of feed water pump that the utility model provides, and this device comprises: controller, servo electromagnetic valve, double-act-ing hydraulic J-Horner, scoop tube, a guarantor position solenoid valve; Described controller is connected with described guarantor position solenoid valve with described servo electromagnetic valve, for to described servo electromagnetic valve and described guarantor position solenoid valve sending controling instruction, and detects the signal condition of the control command sending to described servo electromagnetic valve; Described servo electromagnetic valve is connected with described double-act-ing hydraulic J-Horner, for control oil inlet quantity, the oil drain quantity of described double-act-ing hydraulic J-Horner according to the control command of described controller; Described double-act-ing hydraulic J-Horner is connected with described scoop tube with described servo electromagnetic valve, for controlling the operation of described scoop tube; Described guarantor position solenoid valve is between described servo electromagnetic valve and described double-act-ing hydraulic J-Horner, for cut off the control of described servo electromagnetic valve to hydraulic oil according to the control command of described controller.
Preferably, this device further comprises: scoop tube position feedback device, is connected with described double-act-ing hydraulic J-Horner with described controller, for monitoring with feed back to water pump scoop tube position information.
Preferably, this device further comprises: accident warning device, is connected with described controller, for the warning output of fault.
Preferably, described controller is for the electric current threshold value of Monitoring and Controlling command signal.
Preferably, described electric current threshold value is 4-20mA.
Preferably, described scoop tube position feedback device is position transducer.
Preferably, described position transducer is magnetic sensor.
Preferably, described accident warning device is display device and/or loudspeaker and/or buzzer.
Preferably, described servo electromagnetic valve is three position four-way electromagnetic valve.
Preferably, described guarantor position solenoid valve is two position four-way solenoid valves.
Pass through technique scheme, monitoring control devices sends to the command signal of servo electromagnetic valve and the position information of scoop tube, in the situation that breaking down, activate and protect position solenoid valve, realization maintains fault eve scoop tube position, and trigger malfunction alarm and notify operations staff to organize fault treatment, thereby water supply system operational reliability and set steady have been improved.
Other feature and advantage of the present utility model partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:
Fig. 1 is for keeping the structural representation of device of the scoop tube control position of feed water pump;
Fig. 2 is the fundamental diagram of a kind of mode of execution of the present utility model.
Description of reference numerals
10, controller; 20, servo electromagnetic valve; 30, double-act-ing hydraulic J-Horner; 40, scoop tube; 50, protect position solenoid valve; 21, PLC; 22, three position four-way electromagnetic valve; 23, two position four-way solenoid valves; 24, scoop tube position feedback device; 25, accident warning device.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
Electrically driven feedpump is realized speed-regulating function, be that the flexible number of controlling the working oil in active chamber by scoop tube realizes, and the fore and aft motion of scoop tube is to control the oil inlet quantity of double-act-ing hydraulic J-Horner, the number of oil drain quantity realizes by servo electromagnetic valve.Electrically driven feedpump controller sends control command signal to servo electromagnetic valve, and (each command signal has current value, and these current values have an electric current threshold value, 4-20mA for example), adjust the position of scoop tube, the current value of this control command signal is any one value being between electric current threshold value 4-20mA, this is worth the position of corresponding scoop tube, if that is: the current value of control command signal is 4mA, the position of corresponding scoop tube is 0%, scoop tube can go deep into the bottom (0% position) of active chamber, working oil in active chamber is minimum, now the running speed of feed water pump is minimum, if the current value of control command signal is 20mA, the position of corresponding scoop tube is 100%, and scoop tube can shift out active chamber (100% position), and the working oil in active chamber is maximum, and now the running speed of feed water pump is maximum.If electrically driven feedpump controller output order is delivered to servo electromagnetic valve signal, break down, cannot maintenance medium cylinder pressure control that oil enters, oil extraction circulation, and then cannot maintain the position of scoop tube, will cause feed water pump stall.
In order to address the above problem, shown in Fig. 1 and Fig. 2, it is a kind of for keeping the device of the scoop tube control position of feed water pump that the utility model provides, and this device comprises: controller 10, servo electromagnetic valve 20, double-act-ing hydraulic J-Horner 30, scoop tube 40, a guarantor position solenoid valve 50; Described controller 10 and described servo electromagnetic valve 20 are connected with a described guarantor position solenoid valve 50, and for to described servo electromagnetic valve 20 and described guarantors position solenoid valve 50 sending controling instructions, and detection is to the signal condition of the control command of described servo electromagnetic valve 20 transmissions; Described servo electromagnetic valve 20 is connected with described double-act-ing hydraulic J-Horner 30, for control oil inlet quantity, the oil drain quantity of described double-act-ing hydraulic J-Horner 50 according to the control command of described controller 10; Described double-act-ing hydraulic J-Horner 50 is connected with described scoop tube 40 with described servo electromagnetic valve 20, for controlling the operation of described scoop tube; Described guarantor position solenoid valve 50 is between described servo electromagnetic valve 20 and described double-act-ing hydraulic J-Horner 30, for cut off the control of 20 pairs of hydraulic oil of described servo electromagnetic valve according to the control command of described controller 10.
This device can further comprise scoop tube position feedback device 24 and accident warning device 25.Described controller 10 sends to described servo electromagnetic valve 20 the control command signal of adjusting described scoop tube 40 positions, described servo electromagnetic valve 20 receives after the control command signal of described controller transmission, will regulate oil inlet quantity and the oil drain quantity of described double-act-ing hydraulic J-Horner 30, by regulating oil inlet quantity and the oil drain quantity of described double-act-ing hydraulic J-Horner 30 to drive the operation of described scoop tube 40, thereby reach the object that regulates described scoop tube 40 positions.Meanwhile, the position transducer of described scoop tube position feedback device 24 can gather the position of described scoop tube 40 constantly, and the position information of the described scoop tube 40 collecting is delivered to described controller 10.Described controller 10 can judgement position that now position and needing of described scoop tube 40 regulates, if the position of described scoop tube 40 and the position consistency that needs to regulate, described controller 10 stops to described servo electromagnetic valve 20 sending controling instruction signals; If the position of described scoop tube 40 is inconsistent with the position that needs to regulate, described controller 10 continues to described servo electromagnetic valve 20 sending controling instruction signals, until the position of described scoop tube 40 reaches, needs position.Alternatively, scoop tube position feedback device 24 can be position transducer, and described position transducer can be realized the sensor of this function for magnetic sensor or other.
At described controller 10 in described servo electromagnetic valve 20 sending controling instruction signals, described controller 10 also needs to monitor described control command signal, whether the current value that judges described control command signal departs from threshold value, and the threshold value of electric current described in the present embodiment is 4-12mA.If the current value of described control command signal is in the scope of the threshold value of described electric current, described control command signal continues to send to described servo electromagnetic valve 20; If the current value of described control command signal departs from the threshold value of described electric current, described controller 10 is to described guarantor position solenoid valve 50 sending controling instructions.The described position solenoid valve 50 of protecting receives after the control command of described controller 10 transmissions, can cut off the control of 20 pairs of described double-act-ing hydraulic J-Horners 30 of described servo electromagnetic valve, keep oil inlet quantity and oil drain quantity in described double-act-ing hydraulic J-Horner 30 now constant, thereby reach the object that keeps described scoop tube 40 positions.Simultaneously, described controller 10 also can send alarm signal to described accident warning device 25, described accident warning device 27 is by modes such as display device and/or loudspeaker and/or buzzers, or other modes that can be used for warning reminding remind staff to occur that feed-water pump breaks down, staff is processed fault in time, keep the stability of water supply system reliability of operation and unit.
As an embodiment, as shown in Figure 2, that described controller 10 is used is PLC21, the in the situation that of the normal operation of electrically driven feedpump, first, described PLC21 can receive the signal for the position of the described scoop tube 40 that arranges from feed-water pump, for example: the current value of this signal is 12mA, refers to and described scoop tube 40 need to be adjusted to neutral position (i.e. 50% position).Described PLC21 sends one to described scoop tube position feedback device 24 and requires the now signal of physical location of the described scoop tube 40 of feedback, described scoop tube position feedback device 24 receives after the signal of described PLC21 transmission, position transducer in described scoop tube position feedback device 24 gathers the position information of described scoop tube 40 immediately, for example: the position that now position of described scoop tube 40 is 0%, described scoop tube position feedback device 24 can be to a signal that current value is 4mA of described PLC21 feedback.Described PLC21 receives after the feedback signal of described scoop tube position feedback device 24, can judgement this feedback signal and for adjusting the current value of the signal of described scoop tube 40 positions, if the two current value is identical, explanation does not need to adjust the position of described scoop tube 40; If both current values are different, explanation need to be adjusted the position of described scoop tube 40.
For example: now the current value of feedback signal is 4mA, and be 12mA for adjusting the current value of the signal of described scoop tube 40 positions, the current value that both are described is different, and described PLC21, according to the result of judgement, sends a control command signal that current value is 12mA to 3-position 4-way servovalve 22.Simultaneously, described PLC21 can detect the current value of this control command signal, judge that this command signal current value is whether in the scope of electric current threshold value 4-20mA, if the current value of this control command signal exceeds the scope of electric current threshold value 4-20mA, as: this current value is 3mA or 25mA, illustrates that this control command signal breaks down; If the current value of this control command signal in the scope of electric current threshold value 4-20mA, i.e. the control signal instruction that the current value of the actual transmission of described PLC21 is 12mA, this control signal instruction meeting continues to send to described 3-position 4-way servovalve 22.The electromagnetic brake of described 3-position 4-way servovalve 22 receives after the control command signal of described PLC21 transmission, can be by adjusting the valve of described 3-position 4-way servovalve 22, adjust oil inlet quantity and the oil drain quantity of the hydraulic oil in described double-act-ing hydraulic J-Horner 30, always drive the operation of described scoop tube 40, until reach the needed position of the rotating speed of feed water pump.In this process, the position transducer of described scoop tube position feedback device 24 can gather the position of described scoop tube 40 constantly, to described PLC21, feed back the physical location of described scoop tube 40, until the needed position of the rotating speed of feed water pump is adjusted in the position of described scoop tube 40 simultaneously.Alternatively, described position transducer can be realized the sensor of this function for magnetic sensor or other.
Alternatively, as an embodiment, in said process, described PLC21 is when detecting the control command signal that described PLC21 sends to described 3-position 4-way servovalve 22, the current value of this control command signal detected not in the scope of electric current threshold value 4-20mA, illustrate that the control command signal that described PLC21 sends to described 3-position 4-way servovalve 22 breaks down.Now, described PLC21 protects position solenoid valve 23 to described two four-ways and sends a guarantor position control command signal, described two four-ways guarantor position solenoid valve 23 receives after the control command signal of described PLC21 transmission, throttle down immediately, cut off the control of 22 pairs of interior hydraulic oil oil inlet quantities of described double-act-ing hydraulic J-Horner 30 of described 3-position 4-way servovalve and oil drain quantity, keep the oil mass in described double-act-ing hydraulic J-Horner 30, thereby the position of realizing described scoop tube 40 remains on the position of fault eve, can not cause the stall because of feed water pump, and cause the tripping operation of unit.Meanwhile, described PLC21 also can send alarm signal to described accident warning device 25, described accident warning device 27 is by modes such as display device and/or loudspeaker and/or buzzers, or other modes that can be used for warning reminding remind staff to occur that feed-water pump breaks down, staff is processed fault in time, can not cause a serious accident.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
Claims (10)
1. for keeping a device for the scoop tube control position of feed water pump, it is characterized in that, this device comprises: controller (10), servo electromagnetic valve (20), double-act-ing hydraulic J-Horner (30), scoop tube (40), a guarantor position solenoid valve (50);
Described controller (10) is connected with described guarantor's position solenoid valve (50) with described servo electromagnetic valve (20), be used for to described servo electromagnetic valve (20) and described guarantor position solenoid valve (50) sending controling instruction, and detect the signal condition of the control command sending to described servo electromagnetic valve (20);
Described servo electromagnetic valve (20) is connected with described double-act-ing hydraulic J-Horner (30), for control oil inlet quantity, the oil drain quantity of described double-act-ing hydraulic J-Horner (30) according to the control command of described controller (10);
Described double-act-ing hydraulic J-Horner (30) is connected with described scoop tube (40) with described servo electromagnetic valve (20), for controlling the operation of described scoop tube (40);
Described guarantor's position solenoid valve (50) is positioned between described servo electromagnetic valve (20) and described double-act-ing hydraulic J-Horner (30), for cut off the control of described servo electromagnetic valve (20) to hydraulic oil according to the control command of described controller (10).
2. according to claim 1ly for keeping the device of the scoop tube control position of feed water pump, it is characterized in that, this device further comprises:
Scoop tube position feedback device (24), is connected with described double-act-ing hydraulic J-Horner (30) with described controller (10), for feeding back to water pump scoop tube position information to described controller (10).
3. according to claim 2ly for keeping the device of the scoop tube control position of feed water pump, it is characterized in that, this device further comprises:
Accident warning device (25), is connected with described controller (10), for the warning output of fault.
4. arbitrary described for keeping the device of the scoop tube control position of feed water pump according to claim 1-3, it is characterized in that, described controller (10) is for the electric current threshold value of Monitoring and Controlling command signal.
5. according to claim 4ly for keeping the device of the scoop tube control position of feed water pump, it is characterized in that, described electric current threshold value is 4-20mA.
6. according to claim 2ly for keeping the device of the scoop tube control position of feed water pump, it is characterized in that, described scoop tube position feedback device (24) is position transducer.
7. according to claim 6ly for keeping the device of the scoop tube control position of feed water pump, it is characterized in that, described position transducer is magnetic sensor.
8. according to claim 3ly for keeping the device of the scoop tube control position of feed water pump, it is characterized in that, described accident warning device (25) is display device and/or loudspeaker and/or buzzer.
9. according to claim 1ly for keeping the device of the scoop tube control position of feed water pump, it is characterized in that, described servo electromagnetic valve (20) is three position four-way electromagnetic valve (22).
10. according to claim 1ly for keeping the device of the scoop tube control position of feed water pump, it is characterized in that, described guarantor's position solenoid valve (50) is two position four-way solenoid valves (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320739537.0U CN203548161U (en) | 2013-11-20 | 2013-11-20 | Device for keeping control position of scoop tube of feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320739537.0U CN203548161U (en) | 2013-11-20 | 2013-11-20 | Device for keeping control position of scoop tube of feed pump |
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| Publication Number | Publication Date |
|---|---|
| CN203548161U true CN203548161U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320739537.0U Expired - Lifetime CN203548161U (en) | 2013-11-20 | 2013-11-20 | Device for keeping control position of scoop tube of feed pump |
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| CN (1) | CN203548161U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716462A (en) * | 2018-04-13 | 2018-10-30 | 广东核电合营有限公司 | A kind of speed holding meanss and system for nuclear power feed pump group |
| CN109915351A (en) * | 2019-03-15 | 2019-06-21 | 中广核研究院有限公司 | A kind of speed of feedwater holding meanss and speed of feedwater control system |
| CN112502958A (en) * | 2020-11-23 | 2021-03-16 | 岭东核电有限公司 | Nuclear power plant feed pump rotating speed fault diagnosis device and fault judgment method |
-
2013
- 2013-11-20 CN CN201320739537.0U patent/CN203548161U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716462A (en) * | 2018-04-13 | 2018-10-30 | 广东核电合营有限公司 | A kind of speed holding meanss and system for nuclear power feed pump group |
| CN108716462B (en) * | 2018-04-13 | 2020-07-28 | 广东核电合营有限公司 | Speed maintaining device and system for nuclear power water feed pump set |
| CN109915351A (en) * | 2019-03-15 | 2019-06-21 | 中广核研究院有限公司 | A kind of speed of feedwater holding meanss and speed of feedwater control system |
| CN109915351B (en) * | 2019-03-15 | 2020-09-18 | 中广核研究院有限公司 | Water feed pump rotating speed keeping device and water feed pump rotating speed control system |
| CN112502958A (en) * | 2020-11-23 | 2021-03-16 | 岭东核电有限公司 | Nuclear power plant feed pump rotating speed fault diagnosis device and fault judgment method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20140416 |