CN105204453A - Mutually standby pump chain self-starting and interlocking design method - Google Patents

Mutually standby pump chain self-starting and interlocking design method Download PDF

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Publication number
CN105204453A
CN105204453A CN201510104981.9A CN201510104981A CN105204453A CN 105204453 A CN105204453 A CN 105204453A CN 201510104981 A CN201510104981 A CN 201510104981A CN 105204453 A CN105204453 A CN 105204453A
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pump
gate logic
starting
module
self
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CN201510104981.9A
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CN105204453B (en
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周人
汪湛
吕志国
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Shanghai Keyontechs Co Ltd
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Shanghai Keyontechs Co Ltd
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/418Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
    • G05B19/41865Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention discloses a mutually standby pump chain self-starting and interlocking design method, which is characterized in that logic function modules such as an AND gate logic module, an OR gate logic module, a timer module, a pulse output module, a delay output module and the like in software functions of a DCS (distributed control system) are utilized, technological parameters are detected continuously through a detection instrument, detection signals are sent to the DCS, the DCS carries out a logic operation by using the logic function modules, and the DCS carries out chained start and outputs a logic operation result to a motor control center (MCC) so as to realize control for an electrical execution end when the technological parameters are abnormal, thereby realizing self-starting of a standby pump and stop of the current working pump. The logic control method disclosed by the invention not only can realize immediate start of the standby pump when the working pump breaks down, but also can avoid a circumstance that the two pumps works simultaneously, thereby ensuring the safety and the continuity of production.

Description

A kind of chain self-starting of stand-by pump each other and the method for designing of interlocking
Technical field
The invention belongs to automatic control technology field, particularly relate to one and utilize DCS(DistributedControlSystem, be i.e. scattered control system) chain logic function realize the chain self-starting of stand-by pump each other and the method for designing of interlocking.
Background technology
In chemical plant installations, in order to ensure carrying out continuously of production, avoid owing to there is the device parking phenomenon that equipment failure causes, the normal method adopting the design of the using and the reserved.And the design of pump is also arrange two usually, a job, one for subsequent use.
In existing technology, the control of pump is usually by operating personnel's Non-follow control, and this control mode poor reliability, and add the workload of operating personnel, if operation not in time, can affect carrying out smoothly of production simultaneously.Meanwhile, also there is operative employee's misoperation, cause the situation that two pumps starts simultaneously, all bring adverse influence to production and safety.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of chain self-starting of stand-by pump each other and the method for designing of interlocking, it utilizes the method for the chain logic of DCS to achieve chain self-starting and the interlocking of two stand-by pumps, can realize enabling stand-by pump immediately when working barrel fault, and also can avoid the situation that two pumps runs simultaneously, ensure that safety and the continuity of production, save human cost simultaneously.
To achieve these goals, the technical solution used in the present invention is: a kind of chain self-starting of stand-by pump each other and the method for designing of interlocking, it comprises the chain logic module of pump self-starting and pump interlocks chain logic module, the chain logic module of described pump self-starting comprises one or gate logic module, a pulse output module, two timer module and two and gate logic module, described two timer module are respectively timer module TOFF_1 and timer module TOFF_2, described two comprise first and gate logic modules A ND_1 and second and gate logic modules A ND_2 with gate logic module, described pump interlocks chain logic module and comprises two other and gate logic module, described two other and gate logic module comprise the 3rd with gate logic modules A ND_3 and the 4th and gate logic modules A ND_4, the chain logic of described pump self-starting and described pump interlock chain logic and realize all in dcs.
Preferred technical scheme, described or gate logic module, pulse output module, timer module TOFF_1, timer module TOFF_2, first and gate logic modules A ND_1, second and gate logic modules A ND_2, the 3rd include respective input end and output terminal with gate logic modules A ND_3 and the 4th and gate logic modules A ND_4.
Preferred technical scheme further, described or gate logic module, its first input end is that technological parameter numerical value compares Output rusults with logic setting value, and its second input end is the output terminal of pulse output module; Its output terminal deliver to respectively first with the 3rd input end of gate logic modules A ND_1 and second and the first input end of gate logic modules A ND_2.
Further preferred technical scheme, described pulse output module, its signal period is that after t, t minute, output signal is interrupted, and t=0 ~ 60min is adjustable.
When two described timer module are OFF from ON saltus step, produce a time delay and export, time delay, t=0 ~ 60s was adjustable; The input end of described two timer module is respectively the CRANK PULSES of A pump and the CRANK PULSES of B pump, output terminal be respectively first with the first input end of gate logic modules A ND_1 and second and second input end of gate logic modules A ND_2.
Described first with gate logic modules A ND_1, its first input end is the output terminal of timer module TOFF_1, the second self-starting signal being input as A pump, and the 3rd is input as or gate logic module arithmetic result; Described first directly delivers to electric MCC (Motor Control Center) switch board to the self-starting of control B pump with the output terminal of gate logic modules A ND_1.
Described second with gate logic modules A ND_2, its first input end is or gate logic module arithmetic result, and the second input end is the output terminal of timer module TOFF_2, and the 3rd input end is the self-starting signal of B pump.Described second directly delivers to electric MCC switch board to the self-starting of control A pump with the output terminal of gate logic modules A ND_2.
Described the 3rd with gate logic modules A ND_3, its first input end is output terminal DCS manually stopping A switch pump, and the second input end is the output terminal of B pump self-starting signal.Described 3rd directly delivers to electric MCC switch board to the start-stop of control A pump with the output terminal of gate logic modules A ND_3.
Described the 4th with gate logic modules A ND_4, its first input end is output terminal DCS manually stopping B switch pump, and the second input end is the output terminal of A pump self-starting signal.Described 4th directly delivers to electric MCC switch board to the start-stop of control B pump with the output terminal of gate logic modules A ND_4.
Described DCS system can collect all signals transmitted, and shows, processes and logical operation, and export operation result to corresponding executive component to signal.
Adopt above technical scheme, the beneficial effect of the chain self-starting of a kind of stand-by pump each other of the present invention and the method for designing of interlocking is: (1), driving initial stage arrange by-pass switch, avoids the chain parking because INITIAL PROCESSING parameter instability causes; (2), adopt the logic functional block of DCS and the running signal of pump as the condition of self-starting signal, achieve the automatic control function of pump, decrease human cost, saved resource; (3), utilize self-starting signal as the condition of termination of pumping, reach the object of interlocking, for safety in production provides guarantee; (4), utilize motor M CC to control actuating logic, to accept based on DCS logical process output signal, take into account motor body electric protection demand, achieve the controlling functions of stand-by pump each other, whole control procedure is simple and clear, system stability is high.
Accompanying drawing explanation
Fig. 1 is the chain logical diagram of pump self-starting that the chain logic function of a kind of DCS of utilization of the present invention realizes the chain self-starting of stand-by pump and the method for designing of interlocking each other;
Fig. 2 is the chain logical diagram that the chain logic function of a kind of DCS of utilization of the present invention realizes the pump interlocking of the chain self-starting of stand-by pump and the method for designing of interlocking each other;
Fig. 3 is the MCC Electric Machine Control schematic diagram that the chain logic function of a kind of DCS of utilization of the present invention realizes the chain self-starting of stand-by pump and the method for designing of interlocking each other.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with instantiation also with reference to Fig. 1 to Fig. 3 in accompanying drawing, the present invention is described in more detail.Should be appreciated that, these describe just exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present invention.
As shown in Figure 1, OS by-pass switch was arranged for the driving initial stage, because at the driving initial stage, technological parameter is unstable, for avoiding producing unnecessary interlocking action, a pulse output module PO is set, time, t=60S was adjustable, within the t time of setting, or the signal that gate logic module second input end receives is " 1 " always, such driving INITIAL PROCESSING abnormal parameters would not produce unnecessary chainly to have switched, after the t time, or the pulse output module PO that gate logic module second input end receives outputs signal as " 0 ", chain-initiation comes into operation.
Output rusults after technological parameter numerical value and chain setting value comparison operation is connected to or gate logic module first input end; By-pass switch signal is connected to or the second input end of gate logic module after a pulse output module; Or deliver to after the logic operation result negate of gate logic module simultaneously first with the 3rd input end of gate logic modules A ND_1 and second and the first input end of gate logic modules A ND_2.A pump CRANK PULSES is connected to the first input end of first and gate logic modules A ND_1 after timer module TOFF_1; A pump self-starting signal is connected to second input end of first and gate logic modules A ND_1; First delivers to electric MCC to the self-starting of control B pump with the Output rusults of gate logic modules A ND_1.B pump CRANK PULSES is connected to second input end of second and gate logic modules A ND_2 after timer module TOFF_2; B pump self-starting signal is connected to the 3rd input end of second and gate logic modules A ND_2; Second delivers to electric MCC to the self-starting of control A pump with the Output rusults of gate logic modules A ND_2.
As shown in Figure 2, DCS manually stops A switch pump to be connected with the first input end of gate logic modules A ND_3 with the 3rd; B pump self-starting signal is connected with second input end of gate logic modules A ND_3 with the 3rd; 3rd delivers to electric MCC to the start-stop of control A pump with the Output rusults of gate logic modules A ND_3.DCS manually stops B switch pump to be connected with the first input end of gate logic modules A ND_4 with the 4th; A pump self-starting signal is connected with second input end of gate logic modules A ND_4 with the 4th; 4th delivers to electric MCC to the start-stop of control B pump with the Output rusults of gate logic modules A ND_4.
As shown in Figure 3, MCC arranges hardware switch, provides MCC and DCS two kinds of control modes, simultaneously, the selection on the spot arranging A/B pump again starts hardware capability, start on the spot wherein while a pump at MCC, another pump is set to DCS and controls, when when transporting pump and stopping transport due to unusual service condition, DCS is by above-mentioned detection and logical process function, export and perform instruction to MCC, the long-range stoppage in transit of fault pump is realized to pump machine, the long-range electrical control function of starting shipment of hot standby pump.Separately, MCC motor center arrange again manually open machine time " DCS starts permission " command function, to make DCS host computer, the constraint of effective, safe authorization control is formed to MCC.
Should be understood that, above-mentioned embodiment of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when not departing from thought of the present invention and scope, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and amendment.

Claims (10)

1. the chain self-starting of stand-by pump each other and the method for designing of interlocking, it is characterized in that, it comprises the chain logic module of pump self-starting and pump interlocks chain logic module, the chain logic module of described pump self-starting comprises one or gate logic module, a pulse output module, two timer module and two and gate logic module, described two timer module are respectively timer module TOFF_1 and timer module TOFF_2, and described two comprise first and gate logic modules A ND_1 and second and gate logic modules A ND_2 with gate logic module; Described pump interlocks chain logic module and comprises two other and gate logic module, described two other and gate logic module comprise the 3rd with gate logic modules A ND_3 and the 4th and gate logic modules A ND_4; The chain logic of described pump self-starting and described pump interlock chain logic and realize all in dcs.
2. a kind of chain self-starting of stand-by pump each other according to claim 1 and the method for designing of interlocking, it is characterized in that, described or gate logic module, pulse output module, timer module TOFF_1, timer module TOFF_2, first and gate logic modules A ND_1, second and gate logic modules A ND_2, the 3rd include respective input end and output terminal with gate logic modules A ND_3 and the 4th and gate logic modules A ND_4.
3. a kind of chain self-starting of stand-by pump each other according to claim 1 and the method for designing of interlocking, it is characterized in that, described or gate logic module, its first input end is that technological parameter numerical value compares Output rusults with logic setting value, and its second input end is the output terminal of pulse output module; Its output terminal deliver to respectively first with the 3rd input end of gate logic modules A ND_1 and second and the first input end of gate logic modules A ND_2.
4. a kind of chain self-starting of stand-by pump each other according to claim 2 and the method for designing of interlocking, is characterized in that, described pulse output module, and its signal period is that after t, t minute, output signal is interrupted, and t=0 ~ 60min is adjustable.
5. a kind of chain self-starting of stand-by pump each other according to claim 3 and the method for designing of interlocking, is characterized in that, when two described timer module are OFF from ON saltus step, produce a time delay and export, time delay, t=0 ~ 60s was adjustable; The input end of described two timer module is respectively the CRANK PULSES of A pump and the CRANK PULSES of B pump, output terminal be respectively first with the first input end of gate logic modules A ND_1 and second and second input end of gate logic modules A ND_2.
6. a kind of chain self-starting of stand-by pump each other according to claim 4 and the method for designing of interlocking, it is characterized in that, described first with gate logic modules A ND_1, its first input end is the output terminal of timer module TOFF_1, the second self-starting signal being input as A pump, the 3rd is input as or gate logic module arithmetic result; Described first directly delivers to electric MCC switch board to the self-starting of control B pump with the output terminal of gate logic modules A ND_1.
7. a kind of chain self-starting of stand-by pump each other according to claim 5 and the method for designing of interlocking, it is characterized in that, described second with gate logic modules A ND_2, its first input end is or gate logic module arithmetic result, second input end is the output terminal of timer module TOFF_2,3rd input end is the self-starting signal of B pump, and described second directly delivers to electric MCC switch board to the self-starting of control A pump with the output terminal of gate logic modules A ND_2.
8. a kind of chain self-starting of stand-by pump each other according to claim 6 and the method for designing of interlocking, it is characterized in that, described the 3rd with gate logic modules A ND_3, its first input end is output terminal DCS manually stopping A switch pump, second input end is the output terminal of B pump self-starting signal, and the described 3rd directly delivers to electric MCC switch board to the start-stop of control A pump with the output terminal of gate logic modules A ND_3.
9. a kind of chain self-starting of stand-by pump each other according to claim 7 and the method for designing of interlocking, it is characterized in that, described the 4th with gate logic modules A ND_4, its first input end is output terminal DCS manually stopping B switch pump, second input end is the output terminal of A pump self-starting signal, and the described 4th directly delivers to electric MCC switch board to the start-stop of control B pump with the output terminal of gate logic modules A ND_4.
10. a kind of chain self-starting of stand-by pump each other according to claim 8 and the method for designing of interlocking, it is characterized in that, described DCS system can collect all signals transmitted, and shows, processes and logical operation, and export operation result to corresponding executive component to signal.
CN201510104981.9A 2015-03-11 2015-03-11 A kind of chain self-starting and interlocking design method of mutual backup pump Active CN105204453B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575370A (en) * 2017-10-13 2018-01-12 中石化宁波工程有限公司 The more stand-by pump self-starting logic control circuits based on sequential control
CN112555138A (en) * 2020-12-28 2021-03-26 黑龙江建龙钢铁有限公司 Mutual backup interlocking program optimization method for thin oil pumps of thin oil station of water supply pump of power generation boiler

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575370A (en) * 2017-10-13 2018-01-12 中石化宁波工程有限公司 The more stand-by pump self-starting logic control circuits based on sequential control
CN112555138A (en) * 2020-12-28 2021-03-26 黑龙江建龙钢铁有限公司 Mutual backup interlocking program optimization method for thin oil pumps of thin oil station of water supply pump of power generation boiler

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