CN103241671A - Overwinding preventing device for engineering machinery - Google Patents
Overwinding preventing device for engineering machinery Download PDFInfo
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- CN103241671A CN103241671A CN2012100328981A CN201210032898A CN103241671A CN 103241671 A CN103241671 A CN 103241671A CN 2012100328981 A CN2012100328981 A CN 2012100328981A CN 201210032898 A CN201210032898 A CN 201210032898A CN 103241671 A CN103241671 A CN 103241671A
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- travel switch
- sensing support
- spring
- electromagnetic valve
- support
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- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention relates to an overwinding preventing device for engineering machinery. The overwinding preventing device is simple in structure and reliable in function, and can be widely applied to various auxiliary winding gears. The overwinding preventing device comprises a mast, a lug plate, a travel switch, a sensing support, a steel wire rope, a normally-on electromagnetic valve and the like. When tensile force of the steel wire rope in device reaches a certain numerical value, the sensing support of a 'T'-structure can swing around a pin connected to the lower end thereof, and a long-edge structure (cantilever portion) of the support touches a spring and the travel switch in sequence; and in a process of gradually increasing of swing amplitude of the cantilever, the travel switch outputs an electric signal, a pilot control oil circuit of an auxiliary winch is cut off by the electromagnetic valve, tensile force of the steel wire rope cannot be increased continuously by a driving mechanism, and accordingly the associated parts are protected to be intact. The sensing support touches the spring firstly during swinging; and after the spring is compressed to a certain degree, the travel switch is touched, normal operation of the auxiliary winch can be prevented from being affected by unexpected interferences, and function reliability of the device is guaranteed.
Description
Technical field
The present invention relates to contain the amateur hoisting device of pair (assisting) hoisting mechanism, the various weight lifting appliances that perhaps do not contain hanger components, because the free end of steel rope does not have suspension hook in this mechanism, mostly by being wrapped in steel rope or other soft hoist cable on the reel, connect, lift by crane the employed power tool of this equipment, also can finish simultaneously some other auxiliary events in operation, further expand the function of equipment.
Background technology
At present, in order to ensure the operating efficiency of stake merit machinery, reduce the input of accessory equipment, its winding plant disposes major and minor elevator two cover mechanisms mostly respectively during product design, especially energy-efficient, shift crawler type rotary drilling rig flexibly, architectural feature is more obvious.Between the operational period of the normal boring of rotary drilling rig, the free end of master winch steel rope is connected with the elevator of drill rod end all the time, and the free end of secondary hoisting rope is fixed on the side of boring the mast lower end.
Because master winch steel rope and drilling rod assembly link into an integrated entity; and its tractive force is also very big; also extremely pay attention in the product design process; general all the upper end of boring mast, drilling rod carriage the Position Design of process overtravel protection is arranged; be also referred to as " highly spacing " device, thereby guarantee the safe and reliable of master winch mechanism work.And the design of secondary elevator just seems simple, because being fixed on, the steel rope lower end bores the mast lower end, for fear of between the rotary drilling rig operational period, to cross pine because of this rope body and produce the operation of swing image normal construction, the secondary volume of rounding state this moment steel rope mostly requires to possess certain predetermincd tension.In the process to the operation of its predetermincd tension, again because of the difference of operator's skill level, the excessive and result that causes its fixed mechanism to damage of steel rope predetermincd tension appears easily.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, reliable in function, easy maintenance, can be widely used in the construction machinery and equipment stop overwind device of various auxiliary hoisting mechanisms.
The object of the present invention is achieved like this: this device is made up of parts such as boring mast, otic placode, travel switch, sensing support, steel rope, bearing pin, normal opened type electromagnetic valve.Otic placode is welded on the side that first segment bores the mast lower end, be connected by bearing pin with the sensing support, the free end of steel rope is connected with another circular hole of sensing support, and travel switch is fixed on the otic placode, spiral spring also is installed on this otic placode, and the contact of its travel switch is positioned at the inside of spring.
Brill mast in the described device, be closed long body structure, and the more piece stub boring masting dress by different length forms, bore the both sides of mast and be welded with rectangular guideway respectively near front end face (posture between the rig operational period), make things convenient for the installation of unit head and drilling rod carriage, the top of boring mast is equipped with the forehead parts.
Otic placode in the described device, constituted by one jiao of quadrangle and semicircle by 90 °, its home position has a circular hole, the minor face at place, right angle is corresponding with the semicircle position, the length of this minor face is greater than the diameter of semicircle, and the long limit at its semicircle camber line and place, trapezoidal right angle is tangent, also has the bending structure of protruding at the middle part of its hypotenuse, design has circular hole and tapped bore on the plane of this structure, makes things convenient for the installation of travel switch and spring.
Sensing support in the described device is "T"-shaped structure, circular hole is contained at the two ends of "T"-shaped structure minor face respectively, the circular hole of convenient and otic placode semicircle end and steel rope is free-ended is connected, the size on its long limit (cantilever) can guarantee that this support is subjected to oscillating stroke that rope traction produces, and is enough to touch the contact of spring and travel switch.
During installation, at first otic placode is welded on the side that first segment bores the mast lower end, its position bores that secondary in the pole forehead parts to roll up pulley consistent with being installed in; Then sensing support and otic placode are linked together by bearing pin pad, nut, be fixed on travel switch, spring on the otic placode as required, free end with secondary hoisting rope is connected with another circular hole of sensing support again, at last the normal opened type electromagnetic valve secondary elevator guide that connects is controlled in the oil circuit, and finish with travel switch between being connected of lead.
Advantage of the present invention; travel switch, sensing support and electromagnetic valve have been adopted in this device; when pull of steel wire reaches certain numerical value; the sensing support will be around the bearing pin swing of its connection; spring and travel switch are touched with priority in long limit structure (cantilever) of this support; in the process that its cantilevered swing amplitude progressively strengthens; travel switch will be exported electric signal; the guide that this moment, electromagnetic valve can cut off secondary elevator immediately controls oil circuit; secondary elevator CD-ROM drive motor can't remain in operation; pull of steel wire no longer increases, thereby protects the unlikely damage of each correlated parts.The sensing support at first touches spring between shaking peroid, could touch travel switch after spring is subjected to certain compression, avoids influencing because of unexpected interference the normal running of secondary elevator, guarantees that this apparatus function is reliable.Be described further below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is one embodiment of the present of invention constructionals drawing.
Fig. 2 is cutaway view among Fig. 1.
The specific embodiment
Otic placode (2) is welded on the side that first segment bores mast (1) lower end, and the position that keeps its bending structure up, travel switch (3), spring (6) is installed on the bending structure of protruding on the journal stirrup inclined-plane again; As required sensing support (8) is linked together with journal stirrup by bearing pin (9), packing ring (10), nut (11), the free end of then finishing steel rope (7) is connected with another circular hole of sensing support.After normal opened type electromagnetic valve (5) series connection entered secondary elevator guide control loop, finish linking of circuit between lead between this electromagnetic valve and the travel switch (4) and this switch and the power supply at last.
Claims (3)
1. construction machinery and equipment stop overwind device that is widely used in the various auxiliary hoisting mechanisms is characterized in that: this device comprises and bores mast, otic placode, travel switch, sensing support, steel rope, normal opened type electromagnetic valve, spring, lead, bearing pin, packing ring, nut; Travel switch, spring are fixed on the otic placode, and the free end of steel rope is connected with sensing support one circular hole, and another circular hole of this support is hinged on the otic placode by bearing pin, and the normal opened type electromagnetic valve is connected in the oil circuit of secondary elevator guide control.
2. construction machinery and equipment stop overwind device according to claim 1 is characterized in that the sensing support is "T"-shaped structure, and the two ends of its minor face (non-bracketed part) respectively contain a circular hole.
3. construction machinery and equipment stop overwind device according to claim 1 is characterized in that going into the path blockade that secondary elevator guide controls normal opened type electromagnetic valve in the oil circuit by swing and the series connection of sensing support, realizes the restriction that lineoutofservice signal pull is excessively increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100328981A CN103241671A (en) | 2012-02-05 | 2012-02-05 | Overwinding preventing device for engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100328981A CN103241671A (en) | 2012-02-05 | 2012-02-05 | Overwinding preventing device for engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103241671A true CN103241671A (en) | 2013-08-14 |
Family
ID=48921588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100328981A Pending CN103241671A (en) | 2012-02-05 | 2012-02-05 | Overwinding preventing device for engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103241671A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067447A (en) * | 1975-12-29 | 1978-01-10 | Goss John B | Safety device for cranes |
| JP3155484B2 (en) * | 1997-02-07 | 2001-04-09 | 日立建機株式会社 | Tower crane overwind prevention device |
| CN2811251Y (en) * | 2005-04-04 | 2006-08-30 | 于磊 | Overwinding alarming and stopping device |
| CN201169511Y (en) * | 2008-02-20 | 2008-12-24 | 湖南三一起重机械有限公司 | Crane rope overwind-proof apparatus |
| CN101723276A (en) * | 2008-10-18 | 2010-06-09 | 张传新 | Double-loop controlled overwinding alarming and stopping device |
-
2012
- 2012-02-05 CN CN2012100328981A patent/CN103241671A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067447A (en) * | 1975-12-29 | 1978-01-10 | Goss John B | Safety device for cranes |
| JP3155484B2 (en) * | 1997-02-07 | 2001-04-09 | 日立建機株式会社 | Tower crane overwind prevention device |
| CN2811251Y (en) * | 2005-04-04 | 2006-08-30 | 于磊 | Overwinding alarming and stopping device |
| CN201169511Y (en) * | 2008-02-20 | 2008-12-24 | 湖南三一起重机械有限公司 | Crane rope overwind-proof apparatus |
| CN101723276A (en) * | 2008-10-18 | 2010-06-09 | 张传新 | Double-loop controlled overwinding alarming and stopping device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130814 |