CN109879172A - Luffing control circuit for crane - Google Patents
Luffing control circuit for crane Download PDFInfo
- Publication number
- CN109879172A CN109879172A CN201910100429.0A CN201910100429A CN109879172A CN 109879172 A CN109879172 A CN 109879172A CN 201910100429 A CN201910100429 A CN 201910100429A CN 109879172 A CN109879172 A CN 109879172A
- Authority
- CN
- China
- Prior art keywords
- switch
- relay
- connect
- emergency stop
- normal open
- 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.)
- Granted
Links
Landscapes
- Electromagnets (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention discloses a kind of luffing control circuits for crane.Control circuit includes operation module, limit module and loading module, operation module includes rising switch and down switch, limiting module includes upper limit switch, lower position switch and limit relay, loading module includes load relay and load solenoid valve, the first end of rising switch is connect with firewire, the second end of rising switch and the first end of down switch connect, the second end of down switch is connect by the coil-end of limit relay with zero curve, the normal open switch of limit relay and the coil-end for loading relay are connected between firewire and zero curve, the normal open switch and load solenoid valve for loading relay are connected between firewire and zero curve, the first end of upper limit switch is connect with firewire, the second end of upper limit switch is connect with the first end of the first end of lower position switch and down switch respectively, the second end and decline of lower position switch The second end of switch connects.The present invention improves crane reliability.
Description
Technical field
The invention belongs to field of electrical control, in particular to a kind of luffing control circuit for crane.
Background technique
In the course of work of crane, the lifting of weight is realized by the lifting of suspension hook and is put down.In order to guarantee
Suspension hook will not hit the boom and platform of crane, can typically now set the upper limit position and lower position of a suspension hook, and
Position sensor is set in upper limit position and lower position, then position sensor is monitored by PLC control module, with
Avoiding suspension hook is more than upper limit position and lower position.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems:
Since crane is controlled by PLC control module, once PLC control module breaks down, the limit of crane will lead to
Bit function failure.
Summary of the invention
The embodiment of the invention provides a kind of luffing control circuits for crane, and the reliable of crane can be improved
Property.The technical solution is as follows:
The embodiment of the invention provides a kind of luffing control circuit for crane, the control circuit includes operation mould
Block, limit module and loading module, the operation module include rising switch and down switch, and the limit module includes the upper limit
Bit switch, lower position switch and limit relay, the loading module include load relay and load solenoid valve, the rising
The first end and second end of switch forms normally closed switch, and the first end of the rising switch is connect with firewire, the rising switch
Second end connect with the first end of the down switch, the first end and second end of the down switch forms normally closed switch,
The second end of the down switch is connect by the coil-end of the limit relay with zero curve, the limit relay it is normally opened
The coil-end of switch and the load relay is connected between the firewire and the zero curve, described to load the normally opened of relay
Switch and the load solenoid valve are connected between the firewire and the zero curve, the first end of the upper limit switch and second
End composition normally closed switch, the first end of the upper limit switch are connect with the firewire, the second end point of the upper limit switch
Do not connect with the first end of the first end of the lower position switch and the down switch, the first end of the lower position switch and
Second end forms normally closed switch, and the second end of the lower position switch is connect with the second end of the down switch.
In a kind of implementation of the invention, the control circuit further includes bypass module, and the bypass module includes
Bypass cock and bypass relay, the bypass cock and the coil-end for bypassing relay are connected on the firewire and described
Between zero curve, the normal open switch of the bypass relay is connected in parallel with the lower position switch.
In another implementation of the invention, the control circuit further includes alarm module, the alarm module packet
Alarm relay and buzzer relay are included, the third end of the upper limit switch and the third end of the lower position switch pass through
The coil-end of the alarm relay is connect with the zero curve, the first end of the normal open switch of the alarm relay and the fire
The second end of line connection, the normal open switch of the alarm relay is connected by the coil-end of the buzzer relay and the zero curve
It connects, the first normal open switch and buzzer of the buzzer relay are connected between the firewire and the zero curve.
In another implementation of the invention, the first end of the second normal open switch of the buzzer relay with it is described
Firewire connection, the control circuit further includes noise reduction module, and the noise reduction module includes silence switch and noise reduction relay, described
The first end of the normally closed switch of noise reduction relay is connect with the second end of the second normal open switch of the buzzer relay, described to disappear
The second end of the normally closed switch of sound relay is connect by the coil-end of the buzzer relay with the zero curve, and the noise reduction is opened
The first end of pass is connect with the second end of the second normal open switch of the buzzer relay, and the second end of the silence switch passes through
The coil-end of the noise reduction relay is connect with the zero curve, and the normal open switch and the silence switch of the noise reduction relay are simultaneously
It is linked togather.
In another implementation of the invention, the control circuit further includes emergent stopping module, described promptly to stop
Only module includes emergency stop switch, the first emergency stop relay, the second emergency stop relay and third emergency stop relay, the emergency stop switch
For normally closed switch, the coil-end of the emergency stop switch and the first emergency stop relay be connected on the firewire and the zero curve it
Between, the first end of the normally closed switch of the first emergency stop relay is connect with the firewire, the first emergency stop relay it is normal
Make and break close second end connect with the first end of the normal open switch of the second emergency stop relay, second emergency stop switch it is normal
The second end of switch is connect by the coil-end of the third emergency stop relay with the zero curve, the third emergency stop relay
The first end of normally closed switch connect with the second end of the down switch, the of the normally closed switch of the third emergency stop relay
Two ends are connect by the coil-end of the limit relay with the zero curve, and the third end of the rising switch passes through described second
The coil-end of emergency stop relay is connect with the zero curve.
In another implementation of the invention, the first end of the normal open switch of the third emergency stop relay with it is described
Firewire connection, the emergent stopping module further includes reset switch, and the reset switch is normally closed switch, the reset switch
First end is connect with the second end of the normal open switch of the third emergency stop relay, and the second end of the reset switch passes through described
The coil-end of third emergency stop relay is connect with the zero curve.
In another implementation of the invention, the first end of the normally closed switch of the second emergency stop relay with it is described
The second end of the normally closed switch of first emergency stop relay connects, and the control circuit further includes emergency alert module, described urgent
Alarm module includes anxious telegraph relay, and the second end of the normally closed switch of the second emergency stop relay passes through the anxious telegraph relay
Coil-end connect with the zero curve, the first end of the first normal open switch of the urgency telegraph relay is connect with the firewire, institute
The second end for stating the first normal open switch of anxious telegraph relay is connect with the first end of the normally closed switch of the noise reduction relay.
In another implementation of the invention, the first end and described second of the normally closed switch of the urgency telegraph relay
The second end of the normal open switch of emergency stop relay connects, and the second end and the third of the normally closed switch of the urgency telegraph relay are anxious
Stop the second end connection of the normal open switch of relay.
In another implementation of the invention, the second normal open switch of the urgency telegraph relay and second emergency stop
The normally closed switch of relay is connected in parallel.
In another implementation of the invention, the voltage between the firewire and the zero curve is 220V.
Technical solution provided in an embodiment of the present invention has the benefit that
By the arrangement of upper limit switch, lower position switch and limit relay, when upper limit switch or lower limit are opened
Either one or two of Central Shanxi Plain disconnect, the coil-end of limit relay can not all obtain it is electric so that load relay coil-end can not obtain it is electric,
Normal open switch to load relay can not be closed, and then loaded solenoid valve and can not be obtained electric, and crane can not be gone up and down, to rise
The suspension hook for having arrived limitation crane is more than the effect of upper limit position and lower position.Also, since above-mentioned limit function does not need
Control by PLC control module is realized, even so the failure of PLC control module, also may be implemented the limit of crane
Position, to improve the reliability of crane.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the first circuit diagram of luffing control circuit provided in an embodiment of the present invention；
Fig. 2 is the second circuit figure of luffing control circuit provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
The embodiment of the invention provides a kind of luffing control circuits for crane, as shown in Figure 1, control circuit includes
Operation module, limit module and loading module, operation module include rising switch 100 and down switch 200, and limit module includes
Upper limit switch 300, lower position switch 400 and limit relay KA3, loading module include load relay KA1 and load electricity
Magnet valve YA1 (YA2), the first end 1 and second end 2 of rising switch 100 form normally closed switch, the first end 1 of rising switch 100 with
Firewire L connection, the second end 2 of rising switch 100 are connect with the first end of down switch 200, the first end of down switch 200 and
Second end forms normally closed switch, and the second end of down switch 200 is connect with zero curve N by the coil-end of limit relay KA3, limited
The normal open switch of position relay KA3 and the coil-end for loading relay KA1 are connected between firewire L and zero curve N, load relay
The normal open switch of KA1 and load solenoid valve YA1 (YA2) are connected between firewire L and zero curve N, the first end of upper limit switch 300
1' and second end 2' form normally closed switch, and the first end 1' of upper limit switch 300 is connect with firewire L, and the of upper limit switch 300
Two end 2' are connect with the first end of the first end 1 " of lower position switch 400 and down switch 200 respectively, lower position switch 400
First end 1 " and second end 2 " form normally closed switch, and the second end 2 " of lower position switch 400 and the second end of down switch 200 connect
It connects.
By upper limit switch 300, the arrangement of lower position switch 400 and limit relay KA3, when upper limit switch 300
Or any of lower position switch 400 disconnect, the coil-end of limit relay KA3 can not all obtain it is electric so that load relay
The coil-end of device KA1 can not obtain electric, so that loading the normal open switch of relay KA1 can not be closed, and then load solenoid valve YA1
It (YA2) can not obtain electric, crane can not be gone up and down, so that the suspension hook for playing limitation crane is more than upper limit position and lower position
Effect.Also, since the control that above-mentioned limit function needs not move through PLC control module is realized, even so PLC is controlled
Module breaks down, and the limit of crane also may be implemented, to improve the reliability of crane.
In the present embodiment, the voltage between firewire L and zero curve N is 220V.That is, the luffing control circuit can be with
The alternating current for being 220V suitable for voltage.
In the present embodiment, control circuit further includes bypass module, and bypass module includes bypass cock SA1 and bypass relay
Device KA5, bypass cock SA1 and the coil-end for bypassing relay KA5 are connected between firewire L and zero curve N, bypass relay KA5
Normal open switch be connected in parallel with lower position switch 400.
In above-mentioned implementation, bypass module be used for so that load solenoid valve YA1 (YA2) again it is electric.The course of work
For, bypass cock SA1 is opened, so that the coil-end of bypass relay KA5 obtains electric, the normal open switch closure of bypass relay KA5,
Allow electric current through bypass relay KA5 normal open switch flow through so that the coil-end of limit relay KA3 obtain it is electric,
The normal open switch of limit relay KA3 is closed, and the coil-end of load relay KA1 obtains electric, the normal open switch of load relay KA1
Closure, it is final load solenoid valve YA1 (YA2) again it is electric.
Fig. 2 is the second circuit figure of luffing control circuit, and referring to fig. 2, in the present embodiment, control circuit further includes alarm
Module, alarm module include alarm relay KA4 and buzzer relay KA9, the third end 3' and lower limit of upper limit switch 300
The third end 3 " of switch 400 is connect by the coil-end of alarm relay KA4 with zero curve N, and the normally opened of alarm relay KA4 opens
The first end of pass is connect with firewire L, and the second end of the normal open switch of alarm relay KA4 passes through the coil of buzzer relay KA9
End is connect with zero curve N, and the first normal open switch 91 and buzzer 500 of buzzer relay KA9 is connected between firewire L and zero curve N.
In above-mentioned implementation, when any of upper limit switch 300 and lower position switch 400 are triggered, on
The third end 3' of limit switch 300 or the third end 3 " of lower position switch 400 must be electric, so that the coil of alarm relay KA4
Hold electric, the normal open switch of alarm relay KA4 closure, the coil-end of buzzer relay KA9 obtain it is electric, buzzer relay KA9's
First normal open switch 91 closure, buzzer 500 must be electric, and issues buzzing alarming, and then serve as a warning.
Optionally, the first end of the second normal open switch 92 of buzzer relay KA9 is connect with firewire L, and control circuit is also wrapped
Noise reduction module is included, noise reduction module includes silence switch SB10 and noise reduction relay KA10, the normally closed switch of noise reduction relay KA10
First end connect with the second end of the second normal open switch 92 of buzzer relay KA9, the normally closed switch of noise reduction relay KA10
Second end connect by the coil-end of buzzer relay KA9 with zero curve N, the first end and buzzer relay of silence switch SB10
The second end of the second normal open switch 92 of KA9 connects, and the second end of silence switch SB10 passes through the coil of noise reduction relay KA10
End is connect with zero curve N, and normal open switch and the silence switch SB10 of noise reduction relay KA10 is connected in parallel.
In above-mentioned implementation, after the coil-end of buzzer relay KA9 obtains electric, the second of buzzer relay KA9 is often
Switch 92 is also closed, enable buzzer relay KA9 coil-end persistently it is electric, no longer by the control of alarm relay KA4
System, i.e. buzzer 500 will continue buzzing alarm.When need to stop buzzing alarm when, open silence switch SB10 so that noise reduction after
The coil-end of electric appliance KA10 obtains electric, the normal open switch closure of noise reduction relay KA10, and the normally closed switch of noise reduction relay KA10 is disconnected
It opens, thus the coil-end power loss of buzzer relay KA9, the first normal open switch 91 of buzzer relay KA9 and the second normal open switch
92 disconnect, and then 500 power loss of buzzer, stop buzzing alarm.
In the present embodiment, control circuit further includes emergent stopping module, emergent stopping module include emergency stop switch 600,
First emergency stop relay KA8, the second emergency stop relay KA2 and third emergency stop relay KA7, emergency stop switch 600 are normally closed switch,
The coil-end of emergency stop switch 600 and the first emergency stop relay KA8 are connected between firewire L and zero curve N, the first emergency stop relay
The first end of the normally closed switch of KA8 is connect with firewire L, and the second end of the normally closed switch of the first emergency stop relay KA8 is anxious with second
Stop the first end connection of the normal open switch of relay KA2, the second end of the normal open switch of the second emergency stop switch 600 passes through third urgency
The coil-end for stopping relay KA7 is connect with zero curve N, the first end and down switch of the normally closed switch of third emergency stop relay KA7
200 second end connection, the second end of the normally closed switch of third emergency stop relay KA7 pass through the coil-end of limit relay KA3
It is connect with zero curve N, the third end 3 of rising switch 100 is connect by the coil-end of the second emergency stop relay KA2 with zero curve N.
In above-mentioned implementation, when crane is in propradation, there is the accident of stall decline, emergency stop switch 600
It will be triggered, emergency stop switch 600 disconnects, and the coil-end power loss of the first emergency stop relay KA8, the first emergency stop relay KA8's is normal
It closes and closes the switch.Since the first end 1 of rising switch 100 at this time is connected to third end 3, so the second emergency stop relay KA2
Coil-end obtains electric, and the normal open switch of the second emergency stop relay KA2 closure, the coil-end of third emergency stop relay KA7 obtains electric, third
The normally closed switch of emergency stop relay KA7 disconnects, so that the coil-end power loss of limit relay KA3, limit relay KA3's is normally opened
Switch disconnects, and loads the coil-end power loss of relay KA1, and the normal open switch of load relay KA1 disconnects, and loads solenoid valve YA1
(YA2) power loss, crane stops rising, and then plays the role of emergent stopping.
Optionally, the first end of the normal open switch of third emergency stop relay KA7 is connect with firewire L, and emergent stopping module is also
Including reset switch 700, reset switch 700 is normally closed switch, the first end and third emergency stop relay KA7 of reset switch 700
Normal open switch second end connection, the second end of reset switch 700 passes through the coil-end and zero curve of third emergency stop relay KA7
N connection.
In above-mentioned implementation, after the coil-end of third emergency stop relay KA7 obtains electric, third emergency stop relay KA7
Normal open switch will be closed so that the coil-end of third emergency stop relay KA7 always it is electric, no longer by the second emergency stop relay
The control of KA2, i.e. crane remain shut off state.When needing to reset in crane, reset switch 700 is opened, so that third
The normally closed switch of the coil-end power loss of emergency stop relay KA7, third emergency stop relay KA7 re-closes, third emergency stop relay
The normal open switch of KA7 backs off, and crane can work normally again.
In the present embodiment, the first end of the normally closed switch of the second emergency stop relay KA2 is with the first emergency stop relay KA8's
The second end of normally closed switch connects, and control circuit further includes emergency alert module, and emergency alert module includes anxious telegraph relay
KA6, the coil-end that the second end of the normally closed switch of the second emergency stop relay KA2 passes through anxious telegraph relay KA6 are connect with zero curve N,
The first end of the first normal open switch of anxious telegraph relay KA6 is connect with firewire L, the first normal open switch of anxious telegraph relay KA6
Second end is connect with the first end of the normally closed switch of noise reduction relay KA10.
Optionally, the first end of the normally closed switch of anxious telegraph relay KA6 and the normal open switch of the second emergency stop relay KA2
Second end connection, the second of the normal open switch of the second end and third emergency stop relay KA7 of the normally closed switch of anxious telegraph relay KA6
End connection.
Optionally, the normally closed switch of the second normal open switch of anxious telegraph relay KA6 and the second emergency stop relay KA2 are connected in parallel on
Together.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of luffing control circuit for crane, which is characterized in that the control circuit includes operation module, limit mould
Block and loading module, the operation module include rising switch and down switch, the limit module include upper limit switch, under
Limit switch and limit relay, the loading module include load relay and load solenoid valve, and the of the rising switch
One end and second end form normally closed switch, and the first end of the rising switch is connect with firewire, the second end of the rising switch
It is connect with the first end of the down switch, the first end and second end of the down switch forms normally closed switch, the decline
The second end of switch is connect by the coil-end of the limit relay with zero curve, the normal open switch of the limit relay and institute
The coil-end for stating load relay is connected between the firewire and the zero curve, the normal open switch of the load relay and institute
It states load solenoid valve to be connected between the firewire and the zero curve, the first end and second end composition of the upper limit switch is normal
Make and break is closed, and the first end of the upper limit switch connect with the firewire, the second end of the upper limit switch respectively with it is described
The first end of lower position switch is connected with the first end of the down switch, the first end and second end group of the lower position switch
At normally closed switch, the second end of the lower position switch is connect with the second end of the down switch.
2. luffing control circuit according to claim 1, which is characterized in that the control circuit further includes bypass module,
The bypass module includes bypass cock and bypass relay, and the bypass cock is connected with the coil-end of the bypass relay
Between the firewire and the zero curve, the normal open switch of the bypass relay is connected in parallel with the lower position switch.
3. luffing control circuit according to claim 1, which is characterized in that the control circuit further includes alarm module,
The alarm module includes alarm relay and buzzer relay, the third end of the upper limit switch and the lower position switch
Third end connect by the coil-end of the alarm relay with the zero curve, the normal open switch of the alarm relay
First end is connect with the firewire, and the second end of the normal open switch of the alarm relay passes through the coil of the buzzer relay
End is connect with the zero curve, and the first normal open switch and buzzer of the buzzer relay are connected on the firewire and the zero curve
Between.
4. luffing control circuit according to claim 3, which is characterized in that the second normal open switch of the buzzer relay
First end connect with the firewire, the control circuit further includes noise reduction module, the noise reduction module include silence switch and
Noise reduction relay, the of the second normal open switch of the first end and buzzer relay of the normally closed switch of the noise reduction relay
The connection of two ends, coil-end and the zero curve of the second end of the normally closed switch of the noise reduction relay by the buzzer relay
Connection, the first end of the silence switch are connect with the second end of the second normal open switch of the buzzer relay, the noise reduction
The second end of switch is connect by the coil-end of the noise reduction relay with the zero curve, the normal open switch of the noise reduction relay
It is connected in parallel with the silence switch.
5. luffing control circuit according to claim 4, which is characterized in that the control circuit further includes emergent stopping mould
Block, the emergent stopping module include emergency stop switch, the first emergency stop relay, the second emergency stop relay and third emergency stop relay
Device, the emergency stop switch are normally closed switch, and the coil-end of the emergency stop switch and the first emergency stop relay is connected on described
Between firewire and the zero curve, the first end of the normally closed switch of the first emergency stop relay is connect with the firewire, and described
The second end of the normally closed switch of one emergency stop relay is connect with the first end of the normal open switch of the second emergency stop relay, described
The second end of the normal open switch of second emergency stop switch is connect by the coil-end of the third emergency stop relay with the zero curve, institute
The first end for stating the normally closed switch of third emergency stop relay is connect with the second end of the down switch, the third emergency stop relay
The second end of the normally closed switch of device is connect by the coil-end of the limit relay with the zero curve, and the of the rising switch
Three ends are connect by the coil-end of the second emergency stop relay with the zero curve.
6. luffing control circuit according to claim 5, which is characterized in that the normal open switch of the third emergency stop relay
First end connect with the firewire, the emergent stopping module further includes reset switch, the reset switch be normally closed switch,
The first end of the reset switch is connect with the second end of the normal open switch of the third emergency stop relay, the reset switch
Second end is connect by the coil-end of the third emergency stop relay with the zero curve.
7. luffing control circuit according to claim 6, which is characterized in that the normally closed switch of the second emergency stop relay
First end connect with the second end of the normally closed switch of the first emergency stop relay, the control circuit further includes emergency alarm
Module, the emergency alert module include anxious telegraph relay, and the second end of the normally closed switch of the second emergency stop relay passes through
The coil-end of the urgency telegraph relay is connect with the zero curve, the first end of the first normal open switch of the urgency telegraph relay and institute
State firewire connection, the of the normally closed switch of the second end and noise reduction relay of the first normal open switch of the urgency telegraph relay
One end connection.
8. luffing control circuit according to claim 7, which is characterized in that the of the normally closed switch of the urgency telegraph relay
One end is connect with the second end of the normal open switch of the second emergency stop relay, and the second of the normally closed switch of the urgency telegraph relay
End is connect with the second end of the normal open switch of the third emergency stop relay.
9. luffing control circuit according to claim 7, which is characterized in that the second normal open switch of the urgency telegraph relay
It is connected in parallel with the normally closed switch of the second emergency stop relay.
10. -9 described in any item luffing control circuits according to claim 1, which is characterized in that the firewire and the zero curve
Between voltage be 220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100429.0A CN109879172B (en) | 2019-01-31 | 2019-01-31 | Amplitude variation control circuit for crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100429.0A CN109879172B (en) | 2019-01-31 | 2019-01-31 | Amplitude variation control circuit for crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109879172A true CN109879172A (en) | 2019-06-14 |
| CN109879172B CN109879172B (en) | 2020-06-09 |
Family
ID=66927726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910100429.0A Active CN109879172B (en) | 2019-01-31 | 2019-01-31 | Amplitude variation control circuit for crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109879172B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU800107A1 (en) * | 1979-04-27 | 1981-01-30 | Войсковая Часть 93219 | Device for limiting the travel of load-engaging member of electric winch |
| CN203833505U (en) * | 2014-04-29 | 2014-09-17 | 纽科伦（新乡）起重机有限公司 | Control circuit for crane ground wire control operation |
| CN204145352U (en) * | 2014-10-21 | 2015-02-04 | 浙江箭环电气开关有限公司 | Tower crane luffing circuit for controlling motor |
| CN104891345A (en) * | 2015-04-22 | 2015-09-09 | 李志刚 | Crane ground operation position limitation control apparatus |
| CN105174060A (en) * | 2015-09-28 | 2015-12-23 | 河南省大方重型机器有限公司 | Control method for limiting of multi-trolley crane |
-
2019
- 2019-01-31 CN CN201910100429.0A patent/CN109879172B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU800107A1 (en) * | 1979-04-27 | 1981-01-30 | Войсковая Часть 93219 | Device for limiting the travel of load-engaging member of electric winch |
| CN203833505U (en) * | 2014-04-29 | 2014-09-17 | 纽科伦（新乡）起重机有限公司 | Control circuit for crane ground wire control operation |
| CN204145352U (en) * | 2014-10-21 | 2015-02-04 | 浙江箭环电气开关有限公司 | Tower crane luffing circuit for controlling motor |
| CN104891345A (en) * | 2015-04-22 | 2015-09-09 | 李志刚 | Crane ground operation position limitation control apparatus |
| CN105174060A (en) * | 2015-09-28 | 2015-12-23 | 河南省大方重型机器有限公司 | Control method for limiting of multi-trolley crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109879172B (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2015158218A1 (en) | Motor restarting controller | |
| CN103249663B (en) | Prevent the elevator protection safety device of short circuit | |
| CN105121324A (en) | Elevator having a safety chain with a series connection of safety switch arrangements | |
| CN108328446B (en) | Elevator door loop detection device | |
| TR201807531T4 (en) | Safety circuit for an elevator system. | |
| CN103922214B (en) | Control method of elevator door-motor | |
| CN103523618A (en) | Elevator variable frequency control system | |
| CN109879172A (en) | Luffing control circuit for crane | |
| CN205873559U (en) | Terraced circuit of swift current is prevented to elevator | |
| CN205602888U (en) | Elevator brake control circuit | |
| CN204057544U (en) | Elevator electrical door lock protective circuit again | |
| CN102050389A (en) | Method for checking the condition of a brake of a mechanism controlled by a frequency converter or another converter | |
| CN210710188U (en) | Actuator control system | |
| CN104237782B (en) | Starter relay durable systems and test method with safeguard protection and fault cues | |
| CN214900699U (en) | Intelligent control circuit of frequency converter of permanent magnet synchronous motor for lifter | |
| CN201753236U (en) | Intelligent limiting audible and visual alarm controller of crane | |
| CN102340126B (en) | For the power and control unit of low pressure or medium-voltage equipment | |
| CN201754576U (en) | Logic circuit for controlling shield door with high safety and easy maintenance | |
| CN203845706U (en) | Overload limiting and alarming device | |
| CN204342378U (en) | The safety device of positioning machine and there is its positioning machine | |
| CN203998494U (en) | Building hoist frequency conversion electric controller | |
| CN204131095U (en) | The anti-shake electric installation of low voltage frequency converter | |
| CN109516419A (en) | High-altitude operation vehicle Safety Redundancy control device | |
| CN203545371U (en) | Lift safeguard | |
| CN201458573U (en) | Bypass control circuit on crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |