CN204607426U - Hoisting crane ground behaviour's limit control - Google Patents
Hoisting crane ground behaviour's limit control Download PDFInfo
- Publication number
- CN204607426U CN204607426U CN201520246309.9U CN201520246309U CN204607426U CN 204607426 U CN204607426 U CN 204607426U CN 201520246309 U CN201520246309 U CN 201520246309U CN 204607426 U CN204607426 U CN 204607426U
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- Prior art keywords
- hoisting
- hoisting crane
- contactless
- control
- contact
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Abstract
The utility model grasps limit control with relating to a kind of hoisting crane, this device comprises the control circuit be made up of the secondary contact of the secondary contact of hoisting crane contactless for hoisting and decline contactless switch and weight limiting device, wherein start button is connected with stop button, main contactor and is accessed control circuit, decline contacts of contactor and weight limiting device are connected afterwards and contactless for hoisting contact shunt accesses stick circuit, series relationship is formed with main contactor contact, when the normal adhesive of total contactless switch KM0, hoisting crane normally can hoist, decline; The utility model can realize the different circuit interrupting device of two spacing control, and use cost is lower, has that wiring is simple, precise control, safety are high, is easy to maintenance and the advantage such as to increase work efficiency.
Description
Technical field
The utility model belongs to hoisting crane technical field of electric control, grasps limit control with particularly relating to a kind of hoisting crane.
Background technology
Hoisting crane belongs to a kind of extraordinary high-risk operations equipment, due to the widespread use of ladle carne in recent years, so just seem more important at secure context.Particularly after Tieling hoisting crane event, State General Administration for Quality Supervision is to a new step in the safety requirements of less than 75 tons little tonnage ladle carnes, less than 75 tons little tonnage ladle carnes are changed to QDY model QD model, and therefore descends No. 375 files specially.Wherein have in No. 375 civilian Article 4 relevant regulations " be equiped with multi-form (be generally weight hammer type and rotary and with) the double limitation device (two spacing) of rising end position; and different circuit interrupting devices should be controlled; lifting altitude is greater than the hoisting crane of 20m, also should install falling-threshold position limiting device as required ".On QDY hoisting crane, when bridge operation, control owing to adopting joint action table, and joint action table has special spacing contact, so rotary stopper can control contactless for hoisting, and joint action table has special spacing contact can control total contactless switch, thus be easy to the regulation meeting the different circuit interrupting device of this two spacing control.And the QDY hoisting crane of terrestrial operation form adopts push-botton operation, therefore the different circuit interrupting device of two spacing control cannot be realized.
Summary of the invention
The technical problems to be solved in the utility model overcomes above-mentioned the deficiencies in the prior art exactly, and provides a kind of different circuit interrupting device of two spacing control that can realize, and grasps limit control with saving the hoisting crane of use cost.
For solving the problems of the technologies described above, the technical solution of the utility model is:
Grasp limit control with designing a kind of hoisting crane, comprise the control circuit be made up of the secondary contact of the secondary contact of hoisting crane contactless for hoisting and decline contactless switch and weight limiting device, wherein start button is connected with stop button, main contactor and is accessed control circuit, decline contacts of contactor and weight limiting device are connected afterwards and contactless for hoisting contact shunt accesses stick circuit, series relationship is formed with main contactor contact, when the normal adhesive of total contactless switch KM0, hoisting crane normally can hoist, decline.
Further, control relay and rotation Ii miter is also comprised; Each two grades of lifting mechanism adapted button lifting, sends instruction in both direction by input relay and enters PLC, calculated by PLC internal processes, and export according to setting program, lifting mechanism carries out rising or down maneuver; When arriving upper extreme position when hoisting, rotation Ii miter action, PLC stops exporting, and stops rising.
The beneficial effect of technical solutions of the utility model is:
1, structurally, the utility model hoisting crane ground behaviour's limit control is risen by hoisting crane and the secondary contact of decline contactless switch and weight limiting device form.During work, end position information is risen to by the spacing detection hoisting crane of weight, inside the self saving control circuit by the spacing normally closed contact of weight and decline contactless switch normally closed auxiliary contact limit signal being connected on total contactless switch, and contactless for hoisting normally closed contact and above two node Parallel Designs, ensure that after the spacing action of weight, still can restart total contactless switch does descending motion.Thus realize the different circuit interrupting device of two spacing control, meet No. 375 civilian Article 4 regulations requirement that prior art is mentioned.
2, structurally, the utility model selects rising and decline contactless switch secondary contact as control element, while the action effectively completing No. 375 literary composition regulations, has also saved the cost of corresponding electric elements in the lump.In addition, the utility model has that wiring is simple, precise control, safety are high, be easy to maintenance and the advantage such as to increase work efficiency.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail, wherein:
Fig. 1 is push button control partial schematic diagram of the present utility model;
Fig. 2 is the PLC control part schematic diagram that hoists of the present utility model;
Fig. 3 is the major loop partial schematic diagram that hoists of the present utility model.
Sequence number in figure: AN-1: starter button; AN-2: stop button; ZC: contactless for hoisting; FC: decline contactless switch; KMO: total contactless switch; K01-K03: relay; SXK: rotation Ii miter.
Detailed description of the invention
Embodiment one:
See Fig. 1-3, in figure, the utility model hoisting crane ground behaviour's limit control, by the secondary contact ZC of hoisting crane contactless for hoisting and the secondary contact FC of decline contactless switch and the spacing control circuit formed of weight, when the normal adhesive of total contactless switch KM0, hoisting crane normally can hoist, decline.
During starting, total contactless switch KM0 by pressing starter button AN-1 and stop button AN-2 obtains electric adhesive, and by himself open contact KM0 and contactless for hoisting normally closed contact ZC and decline contactless switch normally closed contact and weight spacing circuit series self-insurance adhesive.Starter button AN-1 can disconnect.
The button of lifting mechanism adapted is elevated each second gear.All send instruction by input relay K01-K03 in both direction and enter PLC, calculated by PLC internal processes, export according to the program of setting, lifting mechanism carries out rising or down maneuver.When arriving upper extreme position if hoist, rotation Ii miter SXK action, PLC stops exporting, and stops rising.
During rising, contactless for hoisting normally closed contact ZC disconnects, and total contactless switch KM0 is by decline contactless switch normally closed contact FC and weight spacing series connection self-insurance adhesive.When arriving upper extreme position when hoisting, rotation Ii miter SXK due to fault attonity or hoist contactless switch ZC due to adhesion can not power-off, the normally closed point of the now spacing action of weight is opened, total contactless switch stick circuit disconnects, total contactless switch dead electricity disconnects, complete machine dead electricity, and lifting mechanism stops rising.Reach sudden stop object.
During decline, now contactless for hoisting normally closed contact ZC closes, and again pressing the total contactless switch KM0 of starter button AN-1 can by contactless for hoisting normally closed contact ZC self-insurance.Now lifting mechanism can do descending motion.
The utility model has that wiring is simple, precise control, safety are high, be easy to maintenance and the advantage such as to increase work efficiency.
The foregoing is only the schematic detailed description of the invention of the utility model; and be not used to limit scope of the present utility model; the equivalent variations that any those skilled in the art makes under the prerequisite not departing from the utility model design and principle and amendment, all should belong to the scope of the utility model protection.
Claims (2)
1. hoisting crane ground behaviour's limit control, it is characterized in that: comprise the control circuit be made up of the secondary contact of the secondary contact of hoisting crane contactless for hoisting and decline contactless switch and weight limiting device, wherein start button is connected with stop button, main contactor and is accessed control circuit, decline contacts of contactor and weight limiting device are connected afterwards and contactless for hoisting contact shunt accesses stick circuit, series relationship is formed with main contactor contact, when the normal adhesive of total contactless switch KM0, hoisting crane normally hoists or declines.
2. hoisting crane ground according to claim 1 behaviour's limit control, is characterized in that: also comprise control relay and rotation Ii miter; Each two grades of lifting mechanism adapted button lifting, sends instruction in both direction by input relay and enters PLC, calculated by PLC internal processes, and export according to setting program, lifting mechanism carries out rising or down maneuver; When arriving upper extreme position when hoisting, rotation Ii miter action, PLC stops exporting, and stops rising.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520246309.9U CN204607426U (en) | 2015-04-22 | 2015-04-22 | Hoisting crane ground behaviour's limit control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520246309.9U CN204607426U (en) | 2015-04-22 | 2015-04-22 | Hoisting crane ground behaviour's limit control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204607426U true CN204607426U (en) | 2015-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520246309.9U Expired - Fee Related CN204607426U (en) | 2015-04-22 | 2015-04-22 | Hoisting crane ground behaviour's limit control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204607426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891345A (en) * | 2015-04-22 | 2015-09-09 | 李志刚 | Crane ground operation position limitation control apparatus |
-
2015
- 2015-04-22 CN CN201520246309.9U patent/CN204607426U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891345A (en) * | 2015-04-22 | 2015-09-09 | 李志刚 | Crane ground operation position limitation control apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20160422 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |