CN205578850U - Quick closing valve butterfly valve open loop control system surges - Google Patents
Quick closing valve butterfly valve open loop control system surges Download PDFInfo
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- CN205578850U CN205578850U CN201620260408.7U CN201620260408U CN205578850U CN 205578850 U CN205578850 U CN 205578850U CN 201620260408 U CN201620260408 U CN 201620260408U CN 205578850 U CN205578850 U CN 205578850U
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Abstract
The utility model discloses a quick closing valve butterfly valve open loop control system surges, including surging the quick closing valve butterfly valve, still include controller, heat supply fast valve control box and the split type hydraulic pressure module that constitutes by check valve, unloader valve, hydraulic pressure lock, shrinkage cavity, two solenoid valves of on -off, quick closing valve solenoid valve, the quick closing valve butterfly valve that surges is including the switching piece, valve, valve position transmitter and the valve limit switch that connect gradually, switching piece couples together valve and split type hydraulic pressure module through oil pipe, and heat supply fast valve control box be the electrical control return circuit, be connected to the valve on, the realization valve control automatically controlled operation on the spot and far, the controller is accepted the valve position state of valve and is opened and close the action through control logic control flap. This system solved among the current quick closing valve butterfly valve control system that surges the valve position trouble many, collect the fragile scheduling problem of moulding piece.
Description
Technical field
This utility model relates to technical field of industrial automatic control, and specifically one is surged rapid cut-off butterfly valves open-loop control system.
Background technology
The rapid cut-off butterfly valves that surges is the visual plant in the thermal power plant unit of thermal power plant, the commonly used closed loop control of this butterfly valve, there is the problem that fault rate is high, difficult in maintenance, affect unit safety operation.
There is problem below and shortcoming in prior art:
(1) design of Hydraulic System of rapid cut-off butterfly valves of surging is complicated, sees Fig. 4, when equipment breaks down, analyzes difficulty, difficult treatment.
(2) hydraulic butterfly valve integrated package uses integrated design with servomotor, and as shown in Figure 4, valve is bulky, weight is big, during engineering specialty maintenance valve body, unavoidably damages electrical equipment, causes defect, maintenance cost to increase.
(3) surge rapid cut-off butterfly valves electric loop design complexity, see Fig. 5, higher to attendant's skill set requirements.
(4) in electric control system, Imported Electronic equipment is many: servo valve, servo card, valve position actuator, valve position transmitter etc. are imported product, owing to spare part is special, procurement cycle is long, cause the long-term cisco unity malfunction of equipment, affect company's benefit, meanwhile, purchase cost is high, causes maintenance cost high.
(5) valve position measuring device is unreliable, and fault is many, simultaneously as the principle of closed loop control is: valve bit instruction compares with valve position feedback, by the power amplification plate output signal of telecommunication to servo ratio electromagnetic valve, controls EH oil inlet and oil return, the position of regulation servomotor.Therefore valve position fault, often results in the rapid cut-off butterfly valves equipment malfunction that surges and makees, and brings potential safety hazard, former inlet valve parallactic angle displacement transducer to see Fig. 4 to the operation at fortune unit.
The subject matter that this equipment exists has: adjustable extent is little；Potentiometer linear precision is poor；Potentiometer service life of equipment is short, reliability is low, and transmitter, easily by the factor such as pipe vibration, cold and hot change, causes mixing up valve position and change, and after closed-loop control system, misoperation phenomenon, impact safety in production repeatedly occurs in valve.
Utility model content
This utility model is in order to solve problem of the prior art, it is provided that the open-loop control system design of hydraulic butterfly valve, solves problem present in former closed-loop control system, improves the security reliability of equipment.
Rapid cut-off butterfly valves open-loop control system of surging of the present utility model, including the rapid cut-off butterfly valves that surges, also include controller 12, heat supply fast valve control chamber 11 and the Split type hydraulic module 13 being made up of check valve 5, feather valve 6, hydraulic lock 7, shrinkage cavity 8, two electromagnetic valves 9 of switching regulator, quick closing valve electromagnetic valve 10；
The described rapid cut-off butterfly valves that surges includes transfer block 2, valve 1, valve position transmitter 3 and the valve limit switch 4 being sequentially connected with；
Described transfer block 2, by oil pipe, couples together valve with Split type hydraulic module 13, and heat supply fast valve control chamber 11 is electric control loop, is connected on valve, it is achieved valve control electric control operation on the spot and far；Controller 12 accepts the valve position state of valve and by controlling logic control valve on an off action.
In described Split type hydraulic module 13, check valve 5 is connected with feather valve 6 and quick closing valve electromagnetic valve 10；Described quick closing valve electromagnetic valve 10 is connected with hydraulic lock 7, two electromagnetic valves 9 of switching regulator；Described feather valve 6 is connected with hydraulic lock 7；And hydraulic lock 7 is connected on two electromagnetic valves 9 of switching regulator by shrinkage cavity 8.
Described valve position transmitter 3 is a kind of linear type displacement sensor component.
Described controller 12 is DCS controller 12.
This utility model uses above technical scheme compared with prior art, has following technical effect that
1, use the analog quantity position of linear type displacement sensor component LVDT Real-time Feedback valve, use the extreme position of limit switch feedback valve.This position signalling is not involved in closed loop control, solves the problem that position signalling fault changes hydraulic butterfly valve state.
2, use switching mode electromagnetic valve to replace former proportional solenoid valve, accept digital output modul signal, when valve needs switch motion, control EH oil-feed or oil return, during halt instruction, block oil-feed and the oil return of servomotor, it is achieved valve protects bit function.Solve proportional solenoid fault or Analog control signal fault, hydraulic butterfly valve misoperation problem.
3, use integration module and servomotor body split design, both avoided the flimsy problem of integration module, and facilitated again the service work of servomotor.
4, succinct electric loop design reliably, had both reduced the fault rate of electric control loop, and easy access is safeguarded again, also reduces the skill set requirements of maintainer；Meanwhile, use conventional electronic devices and components to replace import equipment, both shortened procurement cycle, and reduced again maintenance cost.
Accompanying drawing explanation
Below with reference to accompanying drawing, the utility model is described in further detail:
The hydraulic system principle figure of the rapid cut-off butterfly valves that surges that Fig. 1 this utility model provides；
The hydraulic pressure split type schematic layout diagram of fast valve integrated package that Fig. 2 provides for this utility model；
The hydraulic pressure fast valve electric opened loop control loop structure figure that Fig. 3 provides for this utility model；
The hydraulic pressure fast valve electric opened loop control primary circuit structure chart that Fig. 4 provides for this utility model；
Fig. 5 is imported hydraulic fast valve oil piping system structure chart in prior art；
Fig. 6 is hydraulic pressure fast valve electric closed-loop control system structure chart in prior art；
Fig. 7 is inlet valve parallactic angle displacement transducer schematic diagram in prior art；
In figure, 1-valve, 2-transfer block, 3-linear motion valve position transmitter, 4-valve limit switch, 5-check valve, 6-feather valve, 7-hydraulic lock, 8-shrinkage cavity, two electromagnetic valves of 9-switching regulator, 10-quick closing valve electromagnetic valve, 11-hot fast valve control chamber, 12-DCS controller.
Detailed description of the invention
This utility model provides one to surge rapid cut-off butterfly valves open-loop control system, and for making the purpose of this utility model, technical scheme and effect are clearer, clearly, and referring to the drawings and give an actual example and further describe this utility model.Should be appreciated that and described herein be embodied as only in order to explain this utility model, be not used to limit this utility model.
Fig. 1 and 2 is this utility model structural representation, and whole system includes: the rapid cut-off butterfly valves 1 that surges, transfer block 2, linear motion valve position transmitter LVDT3, valve ON/OFF put in place limit switch 4, check valve 5, feather valve 6, hydraulic lock 7, shrinkage cavity 8, two electromagnetic valves 9 of switching regulator, quick closing valve electromagnetic valve 10, heat supply fast valve control chamber 11, DCS controller 12.
The effect of transfer block 2 is by oil pipe, and valve is coupled together with " Split type hydraulic control module 13 "；Linear motion valve position transmitter LVDT3 is for the instruction of the total travel position of the rapid cut-off butterfly valves that surges；The valve ON/OFF limit switch 4 that puts in place puts in place spacing for reach position and the pass of the rapid cut-off butterfly valves that surges；Check valve 5 rapid cut-off butterfly valves that just allows to surge after the safe oil pressure of EH is set up carries out normal switch action；Feather valve 6 is in the case of the safe oil pressure of EH is set up, close the most a little hydraulic fluid port, the normal regulating of rapid cut-off butterfly valves of surging is realized by two electromagnetic valves 9 of switching regulator, when the safe oil pressure of EH disappears, quick unloading port opened by feather valve 6, quickly lay down the oil pressure surged in rapid cut-off butterfly valves servomotor chamber, it is achieved quick closedown function；When the effect of hydraulic lock 7 and shrinkage cavity 8 is valve normal regulating, control to enter and exit the flow of servomotor chamber indoor oil by hydraulic lock and shrinkage cavity, it is achieved the steady control of valve；Two electromagnetic valves 9 of switching regulator accept switching control instruction, by circle 1YV and the action of pass coil 2YV of bursting at the seams, control oil-feed and oil return.
Hydraulic pressure fast valve electric open-loop control system figure in conjunction with Fig. 3, Fig. 4: when local operation, heat supply fast valve control chamber 11 on the spot/distant place switching push button " SW " is switched to " on the spot " state, operated by shift knob on the spot " SB1 " and " SB2 ", make the action by circle 1YV and the pass coil 2YV that bursts at the seams of two electromagnetic valves 9 of switching regulator, it is achieved the on an off function of valve.During valve switch, switch indication light is bright, the operating state of instruction valve.When valve wide open or fully closed time, " reaching position " or " pass puts in place " display lamp is bright, and instruction valve is when front limit state.When needs Remote control valve door, on the spot/distant place switching push button " SW " is switched to " distant place " state, "ON" and "Off" by DCS controller 12 instruct, and make the action by circle 1YV and the pass coil 2YV that bursts at the seams of two electromagnetic valves 9 of switching regulator, it is achieved the on an off function of valve." reaching position " or " pass puts in place " state of valve, is shown to DCS system by limit switch 4 teletransmission that puts in place of valve ON/OFF.The particular location of valve is shown to DCS system by the transmitter LVDT3 teletransmission of linear motion valve position.
In this system, primarily serve valve location and measure the assembly of function and include: linear motion valve position transmitter LVDT3, valve ON/OFF put in place limit switch 4, transmit 4～20mA signals to DCS, the convenient intermediate orientation monitoring valve by valve position transmitter；By standard-sized sheet or the fully closed state put in place of valve limit switch monitoring valve.This valve level measuring system uses home equipment, measures reliable and stable, thoroughly solves valve position and measures the problem inaccurate, fault is many.
The module primarily serving Split type hydraulic control function includes: the equipment such as check valve 5, feather valve 6, hydraulic lock 7, shrinkage cavity 8, two electromagnetic valves 9 of switching regulator, quick closing valve electromagnetic valve 10, whole module is coupled together with transfer block 2 by oil pipe, during Valve joint maintenance, only need to remove the joint at oil pipe two ends, just can realize valve to separate with hydraulic control module, Locomotive Overhaul is facilitated to work, it is to avoid to damage the equipment of hydraulic control module.
Heat supply fast valve control chamber 11 uses the electronic devices and components such as domestic common auxiliary reclay and two electromagnetic valves 9 of switching regulator, by two electromagnetic valves 9 of the switching regulator in the present embodiment, heat supply fast valve control chamber 11, DCS controller 12, replace the electronic equipments such as the import servo card in the electric closed-loop control system in Fig. 5, Fig. 6, Fig. 7 Central Plains, valve position actuator, servo valve.Thoroughly solve original system design complexity, high to repair and maintenance personnel's skill set requirements；Imported electronic component is many, the problem that procurement cycle length, purchase cost are high.
This utility model controls device to be improved by succinct hydraulic system improvement, split type integration module, valve feedback device and the improvement of succinct electric control loop, thoroughly solve the problems such as original device valve position fault is many, integration module is fragile, system design complexity, repair and maintenance skill set requirements height, import spare parts purchasing cycle length, import spare parts purchasing expense height, improve the safety of equipment, reliability, economy.
Above example only illustrates technological thought of the present utility model; protection domain of the present utility model can not be limited with this; every according to the technological thought that the utility model proposes, any change done on the basis of technical scheme, within belonging to this utility model protection domain.
Claims (4)
1. a rapid cut-off butterfly valves open-loop control system of surging, including the rapid cut-off butterfly valves that surges, it is characterized in that, also include controller (12), heat supply fast valve control chamber (11) and the Split type hydraulic module (13) being made up of check valve (5), feather valve (6), hydraulic lock (7), shrinkage cavity (8), two electromagnetic valves (9) of switching regulator, quick closing valve electromagnetic valve (10)；
The described rapid cut-off butterfly valves that surges includes transfer block (2), valve (1), valve position transmitter (3) and the valve limit switch (4) being sequentially connected with；
Described transfer block (2) pass through oil pipe, valve is coupled together with Split type hydraulic module (13), heat supply fast valve control chamber (11) is electric control loop, is connected on valve, it is achieved valve control electric control operation on the spot and far；Controller (12) accepts the valve position state of valve and by controlling logic control valve on an off action.
One the most according to claim 1 is surged rapid cut-off butterfly valves open-loop control system, it is characterised in that in described Split type hydraulic module (13), check valve (5) is connected with feather valve (6) and quick closing valve electromagnetic valve (10)；Described quick closing valve electromagnetic valve (10) is connected with hydraulic lock (7), two electromagnetic valves (9) of switching regulator；Described feather valve (6) is connected with hydraulic lock (7)；And hydraulic lock (7) is connected on two electromagnetic valves (9) of switching regulator by shrinkage cavity (8).
One the most according to claim 1 is surged rapid cut-off butterfly valves open-loop control system, it is characterised in that: described valve position transmitter (3) is a kind of linear type displacement sensor component.
One the most according to claim 1 is surged rapid cut-off butterfly valves open-loop control system, it is characterised in that: described controller (12) is DCS controller (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620260408.7U CN205578850U (en) | 2016-03-31 | 2016-03-31 | Quick closing valve butterfly valve open loop control system surges |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620260408.7U CN205578850U (en) | 2016-03-31 | 2016-03-31 | Quick closing valve butterfly valve open loop control system surges |
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| CN205578850U true CN205578850U (en) | 2016-09-14 |
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| CN201620260408.7U Active CN205578850U (en) | 2016-03-31 | 2016-03-31 | Quick closing valve butterfly valve open loop control system surges |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524320A (en) * | 2020-11-30 | 2021-03-19 | 华能国际电力股份有限公司营口电厂 | Hydraulic butterfly valve control system |
-
2016
- 2016-03-31 CN CN201620260408.7U patent/CN205578850U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524320A (en) * | 2020-11-30 | 2021-03-19 | 华能国际电力股份有限公司营口电厂 | Hydraulic butterfly valve control system |
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