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Publication numberUS3897311 A
Publication typeGrant
Publication dateJul 29, 1975
Filing dateJul 20, 1973
Priority dateJul 20, 1973
Also published asDE2432278A1, USRE30022
Publication numberUS 3897311 A, US 3897311A, US-A-3897311, US3897311 A, US3897311A
InventorsKrenke Vincent G
Original AssigneeKoppers Co Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pusher ram and quench car travel synchronization system
US 3897311 A
Abstract
An electrical pulsing unit in the pusher ram drive emits a pulse for every preselected incremental distance traveled by the ram from the face of the oven at the start of the push to the completion of the push. The pulses are received in the quench car locomotive and are converted to signals that show the position of the ram during its travel. The quench car has a similar pulsing unit, and pulses from this unit are converted to signals that show the position of the quench car. The quench car locomotive operator can then coordinate the signals to achieve proper coke distribution in the quenching car.
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United States Patent Krenke July 29, 1975 [5 PUSHER RAM AND QUENCH CAR TRAVEL 839,650 6/1960 United Kingdom 202/262 SYNCHRONIZATION SYSTEM 537,244 4/1955 Belgium 202/262 [75] Inventor: Vincent G. Krenke, Pittsburgh, Pa. Primary Examiner Norman Yudkoff [73] Assignee: Koppers Company Inc., Pittsburgh, Assistant Examiner-D, Sanders Pa. Attorney, Agent, or Firm-Sherman H. Barber; Olin E. [22] Filed: July 20 1973 Williams; Oscar B. Brumback [21] Appl. No.: 381,363 [57] ABSTRACT 52 U.S. c1. 202/262; 201/1; 202/227; An electrical pulsing unit in the Pusher ram drive 214/23 emits a pulse for every preselected incremental dis- 51 1m. (:1. C10B 35/00; C10B 47/00 fiance traveled y the ram from the face Of the even at [58] Field of Search 202/262, 227, 228, 229, the Start of the P to the completion of the P 202/230, 263, 270', 214/23; 201/] The pulses are received in the quench car locomotive and are converted to signals that show the position of [56] References Cited the ram during its travel. The quench car has a similar UNITED STATES PATENTS pulsing unit, and pulses from this unit are converted to signals that show the position of the quench car. The 2223 quench car locomotive operator can then coordinate l'l 3,304,241 2/1967 Radcliffe et al. 202 262 gl j iig g proper coke the FOREIGN PATENTS OR APPLICATIONS 816,114 7/1959 United Kingdom 202 262 6 Clam, 2 Drawmg guns 3. S PUSHER E az/s/vu/ an MACH/NE Q Lam/warms FUSl-IERR/IM ts I MNE E 7 OPEN W/lEA/BOTH INDICATORS 4 1415;212:2422 B L V niqm' 21 I I r 1 :h PUSHERRAM I LP/30.3 Liana i PULSE/2 I II'RESE- L F [ME 71g) P03 1., y PRS-i I RD-|5 RSI $272 550 i #5551 I x :1 M112 :5,; I g I 1 PRU-4 FRD M070}? *w 3 I R5 I PUSHERRAM J. cauEc-ro/zRA/Ls I |2sa-/ 574 f AD 0 1* N Male/170k user 3;

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PUSI-IER RAM AND QUENCH CAR TRAVEL SYNCI-IRONIZATION SYSTEM BRIEF SUMMARY OF THE INVENTION LII which illustrates a preferred embodiment of a system in accordance with the invention.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawing:

FIG. 1 is a simplified schematic electrical diagram of a system in accordance with the invention; and

FIG. 2 is a similar electrical diagram of an automatic quench car control associated with the system of FIG. 1.

DETAILED DESCRIPTION In general, the system of the present invention, as represented by the embodiment shown in the electrical diagrams of FIGS. 1 and 2, operates to allow the quench car locomotive operator to determine the position of the quench car in relation to the position of the pusher ram at any moment during the push and in relation to the amount of coke pushed from an oven.

The system of the invention may best be understood by referring to FIGS. 1 and 2 and the description of the sequence of events during a pushing cycle.

The pusher ram operator causes the ram to move toward the face of an oven to be pushed; it is understood, of course, that the pusher and coke side doors have previously been removed, that the pushing ram and coke guide equipment are aligned, and that all else is in order to commence pushing. At the face of the oven on the pusher side, limit switch LSl-l closes when the ram contacts the cam limit switch. The pusher ram pulser unit PUI has been activated and, when LSl-l closes, relay RD-l is energized; closing the circuit to a transmitter.

A pusher ram drive control contact PF-l has been previously closed, since it is in the ram forward drive circuit. Pusher ram drive control contact PR-l remains inactive; but, it would be actuated and closed should the pusher ram operator need to reverse the direction of movement of the ram for any reason after the ram has moved part way into the oven.

A signal is then sent from the transmitter through the collector rails of the pusher machine and quench car locomotive to a receiver in the quench car locomotive. Whereupon, the RD-3 signal path in the receiver normally open, closes. Also the forward movement contact PF-3, also normally open, closes, since the ram is moving forward in the oven.

When contact RD-3 closes, relay PRD-l is energized and closes a circuit to a stepping motor STP on the pushing ram. The signal carried by the RD circuit is a steady signal; whereas, the signal carried by each of the PF and PR circuits is a pulsing signal.

When the pusher ram has moved into the oven far enough to deposit enough coke in the end of the quench car. the quench car locomotive will be started. Pulser PU2, located on the quench car. is energized and contact CF in the forward drive circuit closes, thereby completing a circuit to a stepping motor STQ.

Both stepping motor STP and stepping motor STQ continue to receive pulses and the respective pusher ram and the quench car indicators will show the relative positions of the pusher ram and the quench car. The pusher ram and the quench car continue to move in their respective ways until one of several things occurs to stop the operations.

When the pusher ram reaches the end of its stroke. limit switch LSl-2 opens under the influence of a pusher ram cam, and shuts off all signals to and through the transmitter. Relay PRD-l is de-energized and closes and energizes a circuit to the reset relay RS. It is possible also to manually operate the reset relay to accomplish the same thing.

Should either stepping motor STP or stepping motor STQ move to its maximum position ahead of time, the stepping motor that is ahead activates RS-2 by limit switches LSP-3 and LSQ-3. Relays PRS-l and QRS-I are energized, whereupon the reset motor starts which drives reset pulser PU3. Pulser PU3 sends pulses to both stepping motors STP and STQ, but in the reverse direction to reset the respective indicators.

The stepping motors continue to turn until the indicators return to their original starting positions. Where- 'upon, LSQ-l and LSP-l open and, simultaneously,

when both indicators are reset, relay R5-2 is deenergized. The pulser motor is stopped and reset pulser PU3 is disconnected from the reset circuits.

When the pusher ram has traveled its full stroke and makes contact with limit switch LSl-2, a light indicator and horn sound in the control cab of the pushing machine. This alerts the pushing machine operator who then reverses the movement of the pusher ram and retracts it from the oven.

In like manner, when the quench car locomotive operator sees a light and hears a horn sound as the reset operations take place, he knows that the pushing operation is completed and he then manually activates the locomotive controls to move the quenching car to the quenching station.

All is now ready for the next push. The foregoing describes how the quench car indicator and the pusher ram indicator operate whether the quench car movement is controlled manually by an operator or automatically. If an automatic drive system or electrical circuit is used to move the quench car at a rate of speed that is comparable to the rate at which the coke is being pushed by the pusher ram, then the following operation takes place.

Referring to FIG. 2, when the pusher ram is moving forward and the pusher ram pulser PUl is emitting signals, relay P1X of FIG. 2 will send pulses to STQF (stepping motor); the circuit of FIG. 2 being connected to that of FIG. I at the lines A and B. In like manner, when the quench car is moving and the pulser PU2 is emitting signals, relay QIX will also send pulses to STOP.

Pulses from P1X relay will cause forward movement of the stepping motor and pulses from QlX will cause quench car at a slow speed to catch coke. lf PlX relay pulses faster than QlX relay, then STQF will move forward at a rate controlled by the difference in the pulses of the two relays. Then, the pusher ram is pushing coke faster than the quench car is catching coke.

Under this condition, STQF moves the cam limit switch onto step 2F speed control of the quench car, which allows 01X to catch up to the rate of pulsing of relay P1X and to overtake it perhaps.

In this instance STQF will begin to receive more reverse pulses and drive the rotary cam limit switch from the higher second control speed (2F) of the quench car to again effect a balance.

QlX may overtake and get ahead of P1X relay and then drive STQF in a reverse direction. This will shut off the power supply to the quench car momentarily until a balance is again restored between the pulsing relays. Ideally, the speed of the quench car will be equal to the speed of the pushing ram.

Resetting of the stepping motor STQF and cam limit switch may be accomplished in the same manner as stepping motors STP and STQ by making a connection to these circuits at the proper points.

From the foregoing description .of one embodiment of the invention, those skilled in the art should recognize many important features and advantages of it, among which the following are particularly significant:

That the pusher ram and quench car travel synchronization system of the present'invention operates automatically, thereby reducing significantly the usual human error problem in synchronizing the activity on opposite sides of a coke oven battery;

That the system is simple to construct, but yet is effective and easy to install.

Although the invention has been described herein with a certain degree of particularity it is understood that the present disclosure has been made only as an example and that the scope of the invention is defined by what is hereinafter claimed.

1 claim:

l. A system for synchronizing the travel of a pusher ram in a coke oven chamber with the travel of a coke quenching car receiving hot coke from the oven chamber and propelled by a locomotive relative to such oven chamber, wherein the improvement comprises:

a. switch means activated by said pusher ram as it moves toward and into an oven chamber to be pushed and closing an electrical circuit;

b. a pulse transmitter in said circuit which is activated when said switch means closes that emits pulses;

c. electrical receiver means in said locomotive that receives said emitted pulses and thereafter energizes an electrical circuit wherein there is d. a first stepping motor that actuates said pusher ram in a step-by-step manner responsive to the received pulses and circuit energization;

e. a pulser in said quenching car that is energized by a signal emitted by said receiver;

f. a second stepping motor that is energized by said pulser and that moves said quenching car in a stepby-step manner in sequence with said pusher ram;

and

g. indicator means in said locomotive that is responsive to the actuation of said stepping motors and indicates the relative positions of the pushing ram and the quenching car. I

2. The invention of claim 1 including:

a. means actuated by said pusher ram at the end of its stroke for de-energizing said circuitry; and

b. a reset pulser energized by said means that sends electrical pulse signals to both of said indicators whereby they are reset to initial positions.

3. The invention of claim 2 including:

a. switch means, actuated when said indicators return to the initial position, that de-energize a power circuit to said pulse transmitter.

4. A system for synchronizing thetravel'ofa pusher ram in a coke oven chamber with the travel of a coke quenching car receiving hot coke from the oven chamber and propelled by a locomotive relative to such oven chamber, wherein the improvement comprises:

a. switch means activated by said pusher ram as it moves toward and into an oven chamber to be pushed that closes an electrical circuit;

b. a first pulser energized when said switch closes that emits pulse signals as said pusher ram moves into said oven chamber;

c. a first stepping motor actuated to turn in one direction responsively to said pulse signals;

d. a second pulser that emits pulse signals as said quench car receives coke pushed from said oven chamber and moves relative thereto; and

e. means sending electrical signals from said second pulser to said stepping motor whereby said stepping motor turns in a direction opposite to saidone direction, said stepping motor being so constructed that it does not rotate when the pulse signals from said first and said second pulsers are equal in number during any period of time.

5. The invention of claim 4 wherein:..

a. said stepping motor rotates in a direction to move said quench car at a fasterrate of speed when the number or pulses received from said second pulser is less for said period of time than the number of pulses received from said first pulser; and wherein;

b. said stepping motor, when it receives more pulses from said second pulser than from said first pulser, actuates a rotary cam limit switch to effect control of the speed of said quench car, to thereby effect a balance of position between the quench car and the pusher ram. I

6. The invention of claim 4 wherein:

a. said stepping motor. whenit receives more pulses from said first pulser than from said pulser actuates a rotary cam limit switch to effect control of the speed of the quench car to thereby effect a balance between the quench car and the pusher ram.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3017622 *Jul 14, 1959Jan 16, 1962Woodall Duckman Construction COscillatory circuit interlock of horizontal coke oven batteries
US3124736 *Jul 20, 1959Mar 10, 1964 Automatic controls for positioning a machine
US3304241 *Sep 12, 1961Feb 14, 1967Republic Steel CorpSafety control apparatus for coke oven batteries
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4021309 *Oct 21, 1974May 3, 1977Hoogovens Ijmuiden B.V.Automatic coke oven plant with means to insure sufficient coking
US4072885 *Nov 3, 1975Feb 7, 1978Westinghouse Electric Corp.Control system and method for removal of coke from a coke oven
US4190498 *Jan 16, 1978Feb 26, 1980Firma Carl StillSystem to acquire and monitor operating machinery positions for horizontal coke oven batteries
US4344819 *Jun 23, 1980Aug 17, 1982Bethlehem Steel CorporationMethod of determining coke level
Classifications
U.S. Classification202/262, 202/227, 201/1, 414/148
International ClassificationC10B41/04, C10B41/00
Cooperative ClassificationC10B41/00
European ClassificationC10B41/00