CN105969407A - Coke oven gas-collection pipe pressure regulator and preparation method thereof - Google Patents

Abstract

The invention discloses a coke oven gas-collection pipe pressure regulator and belongs to the technical field of coke oven gas-collection pipe pressure control and protection. In an intelligent electric performer control circuit, if a digital display manual operator is used for realizing performer manual/automatic control, when the manual operator produces abnormal conditions such as fault, the manual operator produces full opening and closing phenomenon. If a key post produces the above problem, serious consequences such as environmental pollution and explosion are produced. On the premise of intelligent manual operator manual/automatic switching control, a manual/automatic switch is used in a loop and programmable controller control and manual operator control are carried out respectively so that manual operator-caused influence on a control loop and device is avoided. Compared with the manual operator, the manual/automatic switch with high quality has stable performances, has a low price, guarantees stable device operation and reduces a device maintenance cost.

Description

A kind of Regulation of Coke Oven Collecting Mains device and method thereof

Technical field

The invention belongs to coke-oven gas-collector pressure control resist technology field, in particular, providing one can be in coke oven collecting main pressure In power controlled system with self-regulation, reduce fault rate, it is to avoid the environmental pollution even generation of explosion accident

Background technology

Regulation of Coke Oven Collecting Mains is related to that safety that coke oven produces and coal oven dithio-gas diffuse the impact on atmospheric environment.At present Coke oven collecting main pressure is automatically adjusted employing Controlled by Programmable Controller analog output, (realizes hands automatic through intelligence manual operator Switching control, and on-the-spot real-time status monitoring), control site intelligent YE action.In actual applications, repeatedly occur Owing to abnormal phenomena occurs in intelligence manual operator, cause intelligent electric activator that standard-sized sheet or fully closed phenomenon occur, directly contribute coke oven Raw coke oven gas diffuses, pollutant atmosphere.In the case, for optimizing automatic control loop, reduce rate of breakdown, use this Guard method, effectively reduces intelligent electric activator misoperation and causes the probability of coke oven emission.

Summary of the invention

It is an object of the invention to improve the stability of Regulation of Coke Oven Collecting Mains, reduce the occurrence probability of pressure regulation fault, Guarantee equipment stable operation, reduces the production safety on coke oven and the impact of atmospheric environment.

Former control loop:

Coke-oven gas-collector pressure control aperture Setting signal (4～20mA) (is realized to intelligence manual operator by Programmable Logic Controller output The hands auto-changeover control of executor and the real-time monitoring of executor's state), then by the intelligence given opening amount signal of manual operator output (4～20mA), to site intelligent YE, control the action of executor, realize the control of coke oven collecting main pressure.See Accompanying drawing 1: before transformation, executor controls circuit diagram.

Present disclosure:

A kind of Regulation of Coke Oven Collecting Mains device, including intelligent electric activator, permutator, intelligence manual operator, one-to-two letter Number allotter, Programmable Logic Controller；Programmable Logic Controller output aperture Setting signal connects one-to-two signal distributor input, and one Dividing binary signal allotter the first outfan to connect permutator normally opened contact (such as Fig. 2: 5+, 9-), one-to-two signal distributor second is defeated Going out termination intelligence manual operator aperture Setting signal input, intelligence manual operator gives opening amount signal output and connects the normally closed tactile of permutator Two contacts of point (such as Fig. 2: 7+, 11-), two contacts of the normally opened point of outfan of permutator and normally closed point short envelopes respectively (as Fig. 2: 6/8+ short envelope, the short envelope of 10/12-), the outfan of permutator accesses intelligent electric activator control signal input；Logical Cross switch transition switch to realize selecting remote programmable controllers or site intelligent manual operator, control intelligent electric activator.See Accompanying drawing 2: after transformation, executor controls circuit diagram.Described permutator at least a pair normally opened contact and a pair normally closed touch Point；Contact resistance is less than 10 ohm.

A kind of Regulation of Coke Oven Collecting Mains method, its step is as follows:

Step one, when coke oven collecting main pressure controlled system with self-regulation is properly functioning, permutator is maintained at automatic mode, Programmable Logic Controller output 4～20mA signals directly by entering intelligent electric activator after permutator, control intelligent electric and hold Row device action regulation collecting main pressure.

Step 2, when intelligent actuator is switched to manual control mode by needs, first permutator is switched to manual mode, The most again intelligence manual operator is switched to manual mode, afterwards by intelligence manual operator " on ", D score key control intelligence perform Device action regulation collecting main pressure.

Step 3, when intelligent actuator is switched to automatic control mode by needs, first confirm that Programmable Logic Controller select at hands Dynamic control mode, and Programmable Logic Controller gives aperture aperture actual with site intelligent YE, intelligence manual operator gives and opens Degree is consistent；Then intelligence manual operator being switched to automatic mode, Controlled by Programmable Controller mode is switched to automatic mode simultaneously； Finally permutator is switched to automatic mode, it is achieved intelligent electric activator automatic control and adjustment collecting main pressure.

Beneficial effect: manual operator is compared with hands automatic change-over, and matter measured hands automatic change-over performance is more stable, and valency Lattice are cheap, on the premise of ensureing equipment stable operation, reduce cost of equipment maintenance.

Accompanying drawing illustrates:

Fig. 1: before transformation, executor controls circuit diagram

Fig. 2: after transformation, executor controls circuit diagram

Detailed description of the invention:

1, this YE automatic protection method requires that YE is 0mA or during more than 20mA in input signal , executor's aperture keeps constant, and Programmable Logic Controller regulates when collecting main pressure controls gently, does not haves and significantly opens Close the situation of executor.

2, manual operator is removed from Programmable Logic Controller automatic loop, newly add 1 permutator and (require that permutator is extremely Rare a pair normally opened contact, a pair normally-closed contact, and permutator is functional, contact resistance is less than 10 ohm),

3, analog input aperture (4～20mA) the signal output of Programmable Logic Controller is connect one-to-two signal distributor input, One-to-two signal distributor the first outfan connects permutator normally opened contact (such as Fig. 2: 5+, 9-), one-to-two signal distributor second Output termination intelligence manual operator gives opening amount signal input, and intelligence manual operator gives the output of aperture (4～20mA) signal and connects afterwards The normally-closed contact (such as Fig. 2: 7+, 11-) of permutator, two contacts of the normally opened point of outfan of permutator and the two of normally closed point Individual contact the shortest envelope (such as Fig. 2: 6/8+ short envelope, the short envelope of 10/12-) respectively, the outfan of permutator accesses intelligent electric and holds Row device control signal inputs, to control the action of executor.Executor's open degree feedback signal accesses intelligence manual operator, for on-the-spot intelligence Can manual operator display executor's aperture state.

4, switched by switch transition, it is achieved the hands (manual operator) of YE/from (Programmable Logic Controller) dynamic switching control System.When permutator selects to automatically control, Programmable Logic Controller output 4～20mA is directly by entering intelligence after permutator YE, controls executor and regulates collecting main pressure；When permutator select Non-follow control time, by manual operator " on ", D score key control executor regulates collecting main pressure.

5, for ensureing smoothness and the safety of hands/automatic switchover, before permutator, one-to-two (4～20mA) signal distributor is increased, Signal distributor the first outfan connects the automatic side of permutator, the second output termination intelligence manual operator Setting signal input, it is ensured that When permutator is automatic, manual operator also can show the intelligent electric activator aperture set-point of real-time Programmable Logic Controller output.

After so transformation, when permutator is automatic, controls loop does not further relate to intelligence manual operator, cut down the number of intermediate links, Avoid impact during manual operator fault, intelligent electric activator controlled, effectively reduce rate of breakdown.Reduce plant maintenance simultaneously And use cost, increase system stability.

Claims (3)

1. a Regulation of Coke Oven Collecting Mains device, it is characterised in that: actuator include intelligent electric activator, permutator, Intelligence manual operator, one-to-two signal distributor, Programmable Logic Controller；Programmable Logic Controller output aperture Setting signal connects one-to-two Signal distributor input, one-to-two signal distributor the first outfan connects permutator normally opened contact, one-to-two signal distributor Second output termination intelligence manual operator aperture Setting signal input, intelligence manual operator gives opening amount signal output and connects permutator Two contacts of normally-closed contact, two contacts of the normally opened point of outfan of permutator and normally closed point short envelopes respectively, permutator Outfan accesses intelligent electric activator control signal input；Realize selecting remote programmable controllers by switch transition switch Or site intelligent manual operator, control intelligent electric activator.

2. Regulation of Coke Oven Collecting Mains device as claimed in claim 1, it is characterised in that: described permutator at least To normally opened contact and a pair normally-closed contact；Contact resistance is less than 10 ohm.

3. a Regulation of Coke Oven Collecting Mains method, it is characterised in that:

Step one, when coke oven collecting main pressure controlled system with self-regulation is properly functioning, permutator is maintained at automatic mode, Programmable Logic Controller output 4～20mA signals directly by entering intelligent electric activator after permutator, control intelligent electric and hold Row device action regulation collecting main pressure；

Step 2, when intelligent actuator is switched to manual control mode by needs, first permutator is switched to manual mode, The most again intelligence manual operator is switched to manual mode, afterwards by intelligence manual operator " on ", D score key control intelligence perform Device action regulation collecting main pressure；

Step 3, when intelligent actuator is switched to automatic control mode by needs, first confirm that Programmable Logic Controller select at hands Dynamic control mode, and Programmable Logic Controller gives aperture aperture actual with site intelligent YE, intelligence manual operator gives and opens Degree is consistent；Then intelligence manual operator being switched to automatic mode, Controlled by Programmable Controller mode is switched to automatic mode simultaneously； Finally permutator is switched to automatic mode, it is achieved intelligent electric activator automatic control and adjustment collecting main pressure.