CN202794953U - Electric screw hoist top brake accident automatic control device - Google Patents
Electric screw hoist top brake accident automatic control device Download PDFInfo
- Publication number
- CN202794953U CN202794953U CN 201220408372 CN201220408372U CN202794953U CN 202794953 U CN202794953 U CN 202794953U CN 201220408372 CN201220408372 CN 201220408372 CN 201220408372 U CN201220408372 U CN 201220408372U CN 202794953 U CN202794953 U CN 202794953U
- Authority
- CN
- China
- Prior art keywords
- programmable controller
- current
- plc programmable
- transmitter
- gate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Stopping Of Electric Motors (AREA)
Abstract
An electric screw hoist top brake accident automatic control device comprises a 380-volt three-phase alternating current power supply, a screw motor (M), and a three-phase switch (KM). The automatic control device is characterized by further comprising a PLC programmable controller (1), a graph control panel (2), a transmitter (3) and current transformers (4). The graph control panel (2) is connected with the PLC programmable controller (1) which is further connected with the transmitter (3). Two current transformers (4) for sensing the output currents on the screw motor (M) are connected on the transmitter (3). A command output interface for controlling the on-off of the three-phase switch (KM) is arranged on the PLC programmable controller (1). By collecting and analyzing the running currents of the motor, the automatic control device can conveniently detect the full-close-position and running jam states of an electric screw hoist, solve the automatic shutdown problem in case of a gate full-close-position state and a running jam state and effectively prevent top brake accidents.
Description
Technical field
The utility model belongs to gate hoist automatic control technology field; more particularly it is a kind of electric screw hoist top lock accident automaton; it can realize electric screw hoist gate complete shut-down position or the control of operation jam auto stop, has played effective protection to preventing top lock accident.
Background technology
In hydraulic engineering, the advantages such as worm-type open-close machine is simple in structure with it, simple installation, low price are widely used in the gate opening/closing of culverts and water gates and water diversion project engineering.Some screw open-close machines that use at present do not have the lock accident protection measure of effective top.Causing screw open-close machine top lock accident main cause is that gate runs to complete shut-down position or operation rapid auto stop during jam.Because when the problem of limit switch precision and reliability caused the gate actual motion to arrive the complete shut-down position, without effective stopping signal, the headstock gear motor continued operation, the top lock causes motor rotation blockage protection action and shuts down.The major accidents such as screw rod, the disconnected headstock gear beam of the broken headstock gear end cap in top or top that will cause like this bending, even cause casualties.In the computer control system, terrain lock station is " unattended, few man on duty " normally in the distance, and the top lock accident of screw open-close machine will have a strong impact on the normal operation of gate.
At present, generally by being set, the devices such as mechanical collision formula limit switch and electronic type gatage detector judge the complete shut-down position of gate operation in the Hydraulic Engineering Design.But be subjected to the constraint of the conditions such as key water control project layout, gate metal construction, operating water level, gate complete shut-down position is under water usually, mechanical collision formula limit switch can only be arranged on the lock, by measuring the stroke of screw rod, judge the complete shut-down position, this detection principle, can't effectively detect microdeformation behind the screw rod pressurized more than the general 2cm of its trueness error because of alignment error and the mechanical property of detector switch.Employing is installed in absolute type shaft-position encoder opening self-detective instrument waterborne and detects complete shut-down position under water in the engineering project that has, but there is the repeatable accuracy error in such opening self-detective instrument, error generally more than 1cm, therefore also can't satisfy the accuracy requirement that electric screw hoist gate complete shut-down position is judged.In the practical engineering application, even it is suitable that above-mentioned two kinds of position detecting switchs are adjusted once in a while, it is set also can be along with time and external environment condition change and change, thereby cause gate to shift to an earlier date that spacing action or gate run to the complete shut-down position and the fault condition such as limit switch is failure to actuate, its reliability also can't satisfy the requirement that electric screw hoist gate complete shut-down position is judged.
Summary of the invention
The purpose of this utility model is to overcome the weak point of above-mentioned existing background technology, and a kind of electric screw hoist top lock accident automaton is provided.
The purpose of this utility model reaches by following measure: electric screw hoist top lock accident automaton, it comprises the three-phase alternating-current supply of 380V, the screw rod motor M, contactor KM, it is characterized in that it also comprises the PLC programmable controller, the Graph Control panel, transmitter, current transformer, described Graph Control panel is connected with the PLC programmable controller, the PLC programmable controller is connected with transmitter, be connected with two current transformers that are used for the output current on the induction screw rod motor on the described transmitter, be useful on the order output interface that control contactor opens and closes on the described PLC programmable controller.
The utility model judges in conjunction with the position signalling of opening self-detective instrument whether gate runs to complete shut-down position or jam in service by collection and analysis to screw open-close machine motor (being called for short the screw rod motor) electric current.For screw open-close machine; when gate runs to complete shut-down position or jam; be that motor is in critical stall operating mode; motor working current increases rapidly; according to this characteristic; sluice control system take Programmable Logic Controller PLC as control core can be analyzed the gate working current in 20ms, and judges according to logic flow prepared in advance and to send the gate stopping signal that puts in place, like this system before the motor stall automatically protection shut down.
In gate transmission loop, current transformer and transmitter are set, gather current of electric; High-performance PLC programmable controller is set in the control loop motor working current characteristic is analyzed and interpretation, the setting that the Graph Control panel carries out the demonstration of current of electric characterisitic parameter and electric electromechanics current control threshold value is set.
The utility model is by collection and analysis to the motor running current; can conveniently be that electric screw hoist complete shut-down position and operation jam state detect; it has solved the gate complete shut-down and has put in place and move jam auto stop problem, prevents that effectively top lock accident from occuring.
Description of drawings
Fig. 1 is structural principle block scheme of the present utility model.
Fig. 2 is the corresponding diagram of electric current and position curve.
1.PLC programmable controller among the figure; 2. Graph Control panel, 3. transmitter, 4. current transformer; 5. order output interface; M. screw rod motor, KM. contactor, Iy. open door or close a running current; t1. the starting current peak value constantly; t2. in the stable electric current initial point moment, t3. shuts down electric current constantly, and the t4. locked rotor current constantly.
Embodiment
The below is to being described with reference to the accompanying drawings performance of the present utility model, but they do not consist of restriction of the present utility model, and is only for example, simultaneously by illustrating that advantage of the present utility model will become more clear and understands easily.
Principle of work of the present utility model is: after gate installation is complete, under the gate accidental conditions, operation gate opening/closing 2-3 time, motor start-up electric current and working current during by PLC programmable controller analog input loop detection record open-close sluice gate, if continuous 3 times motor start-up electric current, open gate current, the error amount that closes gate current in 1%, this moment, machinery and the electrical control equipment of gate hoist were in steady state (SS); Gate is set, and to open operation jam current threshold be to open 1.1 times of gate current, complete shut-down position and to close an operation jam current threshold be 1.1 times (annotate: the motor rotation blockage electric current is generally 1.2 times of rated current) of closing gate current; When gate moved, the PLC programmable controller gathered motor current, and remembered this operation and open (closing) door working current value; (can judge by opening self-detective instrument during at gate (escaping the electric motor starting electric current) in service or near end bank, during near end bank 2cm), start gate current of electric determining program, when motor current surpassed the current threshold of setting, the PLC programmable controller was namely sent out stopping signal; The current threshold coefficient can be by being installed in convenient the setting and adjustment of Graph Control panel on the switch board face, and setting range should be in motor running protection value scope, as shown in Figure 2.
Consult accompanying drawing as can be known: the utility model electric screw hoist top lock accident automaton, it comprises the three-phase alternating-current supply of 380V, the screw rod motor M, contactor KM, it is characterized in that it also comprises PLC programmable controller 1, Graph Control panel 2, transmitter 3, current transformer 4, described Graph Control panel 2 is connected with PLC programmable controller 1, PLC programmable controller 1 is connected with transmitter 3, be connected with two current transformers 4 that are used for the output current on the induction screw rod motor M on the described transmitter 3, be useful on the order output interface that control contactor KM opens and closes on the described PLC programmable controller 1, as shown in Figure 1.
Other unspecified part is prior art.
Claims (1)
1. electric screw hoist top lock accident automaton, it comprises the three-phase alternating-current supply of 380V, screw rod motor (M), threephase switch (KM), it is characterized in that it also comprises PLC programmable controller (1), Graph Control panel (2), transmitter (3) summation current transformer (4), described Graph Control panel (2) is connected with PLC programmable controller (1), PLC programmable controller (1) is connected with transmitter (3), be connected with two current transformers (4) that are used for the output current on the induction screw rod motor (M) on the described transmitter (3), be useful on the order output interface that control contactor (KM) opens and closes on the described PLC programmable controller (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220408372 CN202794953U (en) | 2012-08-17 | 2012-08-17 | Electric screw hoist top brake accident automatic control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220408372 CN202794953U (en) | 2012-08-17 | 2012-08-17 | Electric screw hoist top brake accident automatic control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202794953U true CN202794953U (en) | 2013-03-13 |
Family
ID=47822188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220408372 Expired - Lifetime CN202794953U (en) | 2012-08-17 | 2012-08-17 | Electric screw hoist top brake accident automatic control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202794953U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895018A (en) * | 2015-06-30 | 2015-09-09 | 北京世纪合兴起重科技有限公司 | Hydraulic hoist emergent operating device |
| CN107179719A (en) * | 2017-06-21 | 2017-09-19 | 肇庆市贺江电力发展有限公司 | Reservoir gate remote monitoring system |
-
2012
- 2012-08-17 CN CN 201220408372 patent/CN202794953U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895018A (en) * | 2015-06-30 | 2015-09-09 | 北京世纪合兴起重科技有限公司 | Hydraulic hoist emergent operating device |
| CN104895018B (en) * | 2015-06-30 | 2016-08-24 | 北京世纪合兴起重科技有限公司 | Hydraulic headstock gear emergency operation device |
| CN107179719A (en) * | 2017-06-21 | 2017-09-19 | 肇庆市贺江电力发展有限公司 | Reservoir gate remote monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202837496U (en) | On-line monitoring system for mechanical property of high-voltage breaker | |
| CN203038124U (en) | Liquid level controller | |
| CN101478197A (en) | Intelligent electric actuator apparatus based on frequency conversion control technique | |
| CN202794953U (en) | Electric screw hoist top brake accident automatic control device | |
| CN103832928B (en) | The control system of garbage grab bucket crane | |
| CN104512809A (en) | Monitoring method of braking fault of elevating mechanism in crane | |
| CN201530644U (en) | All-digital frequency converting electric control system of mine hoister | |
| CN101436047A (en) | Control system of industrial production material transferring equipment | |
| CN204302750U (en) | A kind of parking systems automatic control system and parking systems | |
| CN104743446A (en) | Braking torque detecting method and system of crane brake | |
| CN105527083A (en) | Elevator speed governor action velocity calibration instrument and method | |
| CN109139352A (en) | A kind of judgement hydrogovernor master matches the device and measurement method of tripping | |
| CN204199365U (en) | The control device of the up mechanism of ultra-large type excavator | |
| CN201534735U (en) | Full digital frequency conversion electric control system control console of mine lifter | |
| CN205023750U (en) | Hoist automatic safety device | |
| CN202272648U (en) | Clamp positioning control system | |
| CN201990987U (en) | Screw rod type hoist controlled by torque load | |
| CN202406074U (en) | Motor controller for realizing distributed control of coal mining equipment | |
| CN202815539U (en) | Automatic control for a cloth inspecting machine edge detector | |
| CN202988462U (en) | Protective device of elevator | |
| CN201489841U (en) | Circuit breaker of sodium-cooled fast reactor protecting system | |
| CN201336607Y (en) | Intelligent electromotive actuator device based on frequency-conversion control technology | |
| CN110005567A (en) | A kind of machine lifting of water-turbine generator set amount real-time high-precision monitoring device and monitoring method | |
| CN104594730A (en) | Locking dog driving method and device of electronic label seal | |
| CN208950766U (en) | A kind of judgement hydrogovernor master matches the device of tripping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |