CN109343465B - Encoder switching device and method of auxiliary shaft double-tank elevator - Google Patents
Encoder switching device and method of auxiliary shaft double-tank elevator Download PDFInfo
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- CN109343465B CN109343465B CN201811509607.7A CN201811509607A CN109343465B CN 109343465 B CN109343465 B CN 109343465B CN 201811509607 A CN201811509607 A CN 201811509607A CN 109343465 B CN109343465 B CN 109343465B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 80
- 238000004891 communication Methods 0.000 claims abstract description 24
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/052—Linking several PLC's
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an encoder switching device of a secondary well double-tank elevator and a switching method thereof, wherein a master control encoder is in communication connection with a master control PLC, a monitoring encoder is in communication connection with the monitoring PLC, a pulse signal lead of the master control encoder is connected with the left end of a standby terminal of a communication cabinet, a pulse signal lead of the monitoring encoder is connected with the right end of the standby terminal of the communication cabinet, a switch is connected between the left end and the right end of the standby terminal, and when the switching is needed, a power switch of the master control encoder and the monitoring encoder is stopped, and the switch of the standby terminal is closed; determining which of the master control encoder and the monitoring encoder has a fault, closing a power switch of the encoder which has no fault, entering a master control program, and modifying the number of codes of one circle of the encoder which has the fault; the invention has the advantages of low safety failure and ensuring the safety of shaft personnel.
Description
Technical Field
The invention relates to the field of electricity, in particular to an encoder switching device and a switching method of a secondary well double-tank elevator.
Background
The encoder plays a role in lifting system, the data of the encoder are used as speed control and travel control in the PLC, once the master control monitoring encoder or the monitoring encoder fails, the lifting machine can not start due to overspeed failure or travel difference failure, and the shaft is suspended for a long time, so that safety accidents are easily caused.
Disclosure of Invention
The invention aims to solve the technical problem that when a main control monitoring encoder or a monitoring encoder fails, a double-tank elevator for a secondary well in the prior art cannot start, so that a shaft is suspended for a long time.
The invention solves the technical problems through the following technical scheme: the utility model provides an encoder auto-change over device of vice two tank elevator, includes master control encoder, monitoring encoder and communication cabinet, master control encoder installs on a concentric shaft that the main shaft of vice two tank elevator was drawn forth, monitoring encoder installs on the gear center pin on the end cover of vice two tank elevator, and the gear on the end cover is interlock with the epaxial gear of main, master control encoder is connected with master control PLC communication, monitoring encoder is connected with monitoring PLC communication, master control encoder's pulse signal lead with the left end of communication cabinet's spare terminal is connected, monitoring encoder's pulse signal lead with the right-hand member of communication cabinet's spare terminal is connected, be connected with the switch between spare terminal's left end and the right-hand member.
Preferably, the diameter ratio of the gear on the end cover to the gear on the main shaft is 1:1.4.
Preferably, the pulse signal lead of the master control encoder comprises A+, A-, B+ and B-, the pulse signal lead of the monitoring encoder comprises A+, A-, B+ and B-, the left end and the right end of the standby terminal are respectively provided with four connecting terminals, the master control PLC and the monitoring PLC respectively comprise an output unit, the output unit of the master control PLC comprises four output pins A2+, A2-, B2+ and B2-, and the output unit of the monitoring PLC comprises four output pins A2+, A2-, B2+ and B2-.
Preferably, the pulse signal leads a+, a-, b+ and B-of the master control encoder are respectively connected with four connection terminals at the left end of the spare terminal from bottom to top in sequence, the pulse signal leads a+, a-, b+ and B-of the monitoring encoder are respectively connected with four connection terminals at the right end of the spare terminal from top to bottom in sequence, the four output pins a2+, A2-, b2+ and B2-of the output unit of the master control PLC are respectively connected with the pulse signal leads a+, a-, b+ and B-of the master control encoder in a communication manner, and the four output pins a2+, A2-, b2+ and B2-of the output unit of the monitoring PLC are respectively connected with the pulse signal leads a+, a-, b+ and B-of the monitoring encoder in a communication manner.
A switching method of an encoder switching device of a secondary well double-tank elevator comprises the following steps:
step one: an initial state, wherein the standby terminal is in an off state;
Step two: when the switch is needed, firstly stopping the power switch of the main control encoder and the power switch of the monitoring encoder, and then closing the switch of the standby terminal;
step three: determining which of the master control encoder and the monitoring encoder fails, if the master control encoder fails, closing a power switch of the monitoring encoder, and if the monitoring encoder fails, closing the power switch of the master control encoder;
step four: entering a main control program, and changing the number of codes of one circle of the main control encoder into 1.4 if a power switch of the monitoring encoder is closed; if the power switch of the master control encoder is closed, changing the one-circle coding number of the monitoring encoder into one-circle coding number/1.4 of the master control encoder;
step five: resetting and driving, and controlling the lifting speed within 1 m/s;
step six: and after the cage is lifted to the wellhead, replacing the fault encoder.
Preferably, in the fourth step, if the number of codes of the monitoring encoder is the same as the number of codes of the master encoder, the number of codes of the monitoring encoder and the number of codes of the master encoder are not modified.
Compared with the prior art, the invention has the following advantages: when the master control encoder or the monitoring encoder is out of order, the elevator can not operate, and the master control PLC and the monitoring PLC can adopt signals of one encoder at the same time, so that the elevator can be lifted in an emergency mode, and long-time suspending of a shaft is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the invention will be briefly described below, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit configuration diagram of an encoder switching device of a secondary well double-tank elevator according to an embodiment of the present invention.
Detailed Description
The following describes in detail the examples of the present invention, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following examples.
As shown in fig. 1, an encoder switching device of a secondary well double-tank elevator comprises a main control encoder 1, a monitoring encoder 2, a standby terminal 3 of a communication cabinet, a main control PLC and a monitoring PLC.
The main control encoder 1 is arranged on a concentric shaft (not shown) led out by a main shaft (not shown) of the auxiliary shaft double-tank elevator (not shown), the monitoring encoder 2 is arranged on a central shaft of a gear (not shown) on an end cover (not shown) of the auxiliary shaft double-tank elevator, the gear on the end cover is meshed with the gear on the main shaft, the main control encoder 1 is in communication connection with the main control PLC, the monitoring encoder 2 is in communication connection with the monitoring PLC, a pulse signal lead of the main control encoder 1 is connected with the left end of a standby terminal 3 of the communication cabinet, a pulse signal lead of the monitoring encoder 2 is connected with the right end of the standby terminal 3 of the communication cabinet, and a switch 301 is connected between the left end and the right end of the standby terminal 3.
Specifically, the diameter ratio of the gear on the end cover to the gear on the main shaft is 1:1.4.
Specifically, the pulse signal lead of the master control encoder 1 comprises A+, A-, B+ and B-, the pulse signal lead of the monitoring encoder 2 comprises A+, A-, B+ and B-, four connecting terminals are arranged at the left end and the right end of the standby terminal 3, the master control PLC and the monitoring PLC comprise output units, the output units of the master control PLC comprise four output pins A2+, A2-, B2+ and B2-, and the output units of the monitoring PLC comprise four output pins A2+, A2-, B2+ and B2-. Pulse signal lead A+, A-, B+ and B-of master control encoder 1 are connected with four binding posts of spare terminal 3 left end in proper order from the bottom up respectively, pulse signal lead A+, A-, B+ and B-of monitor encoder 2 are connected with four binding posts of spare terminal 3 right end in proper order from the top down respectively, four output pins A2+, A2-, B2+, B2-of master control PLC's output unit are connected with pulse signal lead A+, A-, B+, B-of master control encoder 1 respectively, four output pins A2+, A2-, B2+, B2-of monitor PLC's output unit are connected with pulse signal lead A+, A-, B+ and B-of monitor encoder 2 respectively.
A switching method of an encoder switching device of a secondary well double-tank elevator comprises the following steps:
Step one: an initial state in which the spare terminal 3 is in an off state;
Step two: when the switch is needed, firstly, the power switch (not shown) of the master control encoder 1 and the power switch (not shown) of the monitoring encoder 2 are stopped, and then the switch 301 of the standby terminal 3 is closed;
step three: determining which of the master encoder 1 and the monitoring encoder 2 fails, if the master encoder 1 fails, switching on a power switch of the monitoring encoder 2, and if the monitoring encoder 2 fails, switching on the power switch of the master encoder 1;
Step four: entering a main control program, and changing the coding number of one circle of the main control encoder 1 into 1.4 of the coding number of one circle of the monitoring encoder 2 if a power switch of the monitoring encoder 2 is closed; if the power switch of the master control encoder 1 is closed, changing the coding number of one circle of the monitoring encoder 2 into the coding number of one circle of the master control encoder 1/1.4; if the number of the codes of the monitoring encoder 2 and the number of the codes of the master encoder 1 are the same, the number of the codes of the monitoring encoder 2 and the number of the codes of the master encoder 1 are not modified.
Step five: resetting and driving, and controlling the lifting speed within 1 m/s;
step six: and after the cage is lifted to the wellhead, replacing the fault encoder.
The working principle of the invention is as follows: when the motors of the auxiliary shaft double-tank elevator run, the shafts of the main control encoder 1 and the monitoring encoder 2 rotate simultaneously along with the main shaft, and forward and reverse rotation signals and pulse signals of the motors of the auxiliary shaft double-tank elevator are respectively transmitted to the main control PLC and the monitoring PLC. The PLC software can calculate the running speed and the running stroke of the motor in a program according to the pulse signals, and compares the data of the main control encoder 1 and the monitoring encoder 2 in the program after data communication. Once the data difference between the main control encoder 1 and the monitoring encoder 2 exceeds a specified value, the auxiliary shaft double-tank elevator can report a difference fault and a speed comparison fault, so that the auxiliary shaft double-tank elevator cannot operate, once the main control encoder 1 or the monitoring encoder 2 has a problem, the auxiliary shaft double-tank elevator cannot operate, the switch 301 of the standby terminal 3 is closed, and the main control PLC and the monitoring PLC simultaneously adopt signals of a certain encoder, so that the auxiliary shaft double-tank elevator can be lifted in an emergency manner, and long-time suspending of a shaft is avoided.
Through the technical scheme, the encoder switching device and the encoder switching method for the auxiliary shaft double-tank elevator provided by the invention have the advantages of low safety failure and capability of ensuring the safety of shaft personnel. When the master control encoder or the monitoring encoder is out of order, the elevator can not operate, and the master control PLC and the monitoring PLC can adopt signals of one encoder at the same time, so that the elevator can be lifted in an emergency mode, and long-time suspending of a shaft is avoided.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (4)
1. The encoder switching device of the auxiliary shaft double-tank elevator is characterized by comprising a main control encoder, a monitoring encoder and a communication cabinet, wherein the main control encoder is arranged on a concentric shaft led out by a main shaft of the auxiliary shaft double-tank elevator, the monitoring encoder is arranged on a gear central shaft on an end cover of the auxiliary shaft double-tank elevator, a gear on the end cover is meshed with a gear on the main shaft, the main control encoder is in communication connection with a main control PLC, the monitoring encoder is in communication connection with the monitoring PLC, a pulse signal lead of the main control encoder is connected with the left end of a standby terminal of the communication cabinet, a pulse signal lead of the monitoring encoder is connected with the right end of the standby terminal of the communication cabinet, and a switch is connected between the left end and the right end of the standby terminal; when a master control encoder or a monitoring encoder has a problem, so that the elevator cannot operate, adopting a master control PLC and a monitoring PLC to simultaneously adopt signals of one encoder, and changing the number of one-circle codes of the master control encoder into the number of one-circle codes of the monitoring encoder by 1.4 if the master control encoder fails; if the monitoring encoder fails, changing the number of codes of one circle of the monitoring encoder into the number of codes of one circle of the main control encoder/1.4;
The pulse signal lead of the master control encoder comprises A+, A-, B+ and B-, the pulse signal lead of the monitoring encoder comprises A+, A-, B+ and B-, the left end and the right end of the standby terminal are respectively provided with four wiring terminals, the master control PLC and the monitoring PLC respectively comprise an output unit, the output unit of the master control PLC comprises four output pins A2+, A2-, B2+ and B2-, and the output unit of the monitoring PLC comprises four output pins A2+, A2-, B2+ and B2-; pulse signal lead A+, A-, B+ and B-of master control encoder are connected with four binding post of reserve terminal left end respectively from the bottom up in proper order, pulse signal lead A+, A-, B+ and B-of monitoring encoder are connected with four binding post of reserve terminal right-hand member respectively from the top down in proper order, four output pins A2+, A2-, B2+, B2-of master control PLC's output unit respectively with pulse signal lead A+, A-, B+, B-of master control encoder are connected in communication, four output pins A2+, A2-, B2+, B2-of monitoring PLC's output unit respectively with pulse signal lead A+, A-, B+ and B-of monitoring encoder are connected in communication.
2. The encoder switching device of a sub-well double-tank elevator of claim 1, wherein the ratio of the gear diameter on the end cap to the gear diameter on the main shaft is 1:1.4.
3. A method of switching an encoder switching device of a double-tank elevator for a secondary well according to any one of claims 1-2, comprising the steps of:
step one: an initial state, wherein the standby terminal is in an off state;
Step two: when the switch is needed, firstly stopping the power switch of the main control encoder and the power switch of the monitoring encoder, and then closing the switch of the standby terminal;
step three: determining which of the master control encoder and the monitoring encoder fails, if the master control encoder fails, closing a power switch of the monitoring encoder, and if the monitoring encoder fails, closing the power switch of the master control encoder;
step four: entering a main control program, and changing the number of codes of one circle of the main control encoder into 1.4 if a power switch of the monitoring encoder is closed; if the power switch of the master control encoder is closed, changing the one-circle coding number of the monitoring encoder into one-circle coding number/1.4 of the master control encoder;
step five: resetting and driving, and controlling the lifting speed within 1 m/s;
step six: and after the cage is lifted to the wellhead, replacing the fault encoder.
4. The method according to claim 3, wherein in the fourth step, if the number of the monitoring encoder and the number of the master encoder are the same, the number of the monitoring encoder and the number of the master encoder are not modified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811509607.7A CN109343465B (en) | 2018-12-11 | 2018-12-11 | Encoder switching device and method of auxiliary shaft double-tank elevator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811509607.7A CN109343465B (en) | 2018-12-11 | 2018-12-11 | Encoder switching device and method of auxiliary shaft double-tank elevator |
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| Publication Number | Publication Date |
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| CN109343465A CN109343465A (en) | 2019-02-15 |
| CN109343465B true CN109343465B (en) | 2024-04-30 |
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| CN201811509607.7A Active CN109343465B (en) | 2018-12-11 | 2018-12-11 | Encoder switching device and method of auxiliary shaft double-tank elevator |
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| CN106238255A (en) * | 2016-09-18 | 2016-12-21 | 上海发那科机器人有限公司 | A kind of spray robot Dual-encoder redundant system |
| CN106525086A (en) * | 2016-11-08 | 2017-03-22 | 莱芜钢铁集团电子有限公司 | Installation system and method for rotary encoder redundancy detection |
| CN208969494U (en) * | 2018-12-11 | 2019-06-11 | 淮南矿业(集团)有限责任公司 | A kind of encoder switching device of the double tank elevators of auxiliary shaft |
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2018
- 2018-12-11 CN CN201811509607.7A patent/CN109343465B/en active Active
Patent Citations (8)
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| WO2013140515A1 (en) * | 2012-03-19 | 2013-09-26 | 富士通株式会社 | Coding system and encoder repositioning method |
| CN202757630U (en) * | 2012-08-30 | 2013-02-27 | 首钢京唐钢铁联合有限责任公司 | Switchable circuit and encoder redundancy switching device |
| CN203272277U (en) * | 2013-06-07 | 2013-11-06 | 北京首钢自动化信息技术有限公司 | Hydraulic motor speed feedback remote switching device based on speed encoder |
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