CN2097200U - Bow-shaped strain type moment limiter - Google Patents

Bow-shaped strain type moment limiter Download PDF

Info

Publication number
CN2097200U
CN2097200U CN 91215801 CN91215801U CN2097200U CN 2097200 U CN2097200 U CN 2097200U CN 91215801 CN91215801 CN 91215801 CN 91215801 U CN91215801 U CN 91215801U CN 2097200 U CN2097200 U CN 2097200U
Authority
CN
China
Prior art keywords
steel plate
tower crane
travel switch
adjusting screw
bow
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.)
Withdrawn
Application number
CN 91215801
Other languages
Chinese (zh)
Inventor
叶棣荪
徐磊
吴玉峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai No6 Residence Building Engineering Co
Original Assignee
Shanghai No6 Residence Building Engineering Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai No6 Residence Building Engineering Co filed Critical Shanghai No6 Residence Building Engineering Co
Priority to CN 91215801 priority Critical patent/CN2097200U/en
Publication of CN2097200U publication Critical patent/CN2097200U/en
Withdrawn legal-status Critical Current

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Abstract

The utility model relates to a bow-shaped strain type moment limiter which belongs to a safety device for the tower crane. While in use, the tipping damage accident which is caused by the overload of the lifting moment of the tower crane can be prevented. The utility model is characterized in that a bow shape steel plate is soldered on the main chord rod of the tower crane, the middle of the steel plate is provided with one to two adjusting screw, a travel switch bracket is arranged at the lower end of the adjusting screw, a travel switch is fixed on the middle of the bracket, and the switch contact of the travel switch is positioned at the front part of the end point of the adjusting screw. When the crane exceeds the rated weight, the end point of the adjusting screw is contacted with the contact of the travel guide switch; so the alarm can be sent out immediately, and the electric source is cut off at the same time; thereby, the safe operation is achieved.

Description

Bow-shaped strain type moment limiter
The utility model belongs to building field, is specifically to prevent that various model tower cranes from causing a kind of safety device of the damage accident of tumbling because of the overload of hoisting moment.
Press the limiter of moment of dress at present at various different model tower cranes, computermatic, electronic type and mechanical type are arranged, computer and electronic type limiter of moment intuitive display, precision height, but poor reliability, damage rate height, mainly all operations in the open air of this type of killer, meet daily exposing to wind and rain and cause the damage phenomenon easily, simultaneously electric equipment such as welding generator will cause the interference of computer and electronic type killer on the building site, influence reliability, and the cost height.Another kind of mechanical type is to use lever principle to make, and its shortcoming commonality is poor.Structure is multiple assorted, installs and the maintenance inconvenience.
The purpose of this utility model provides a kind of wide accommodation, simple in structure easy for installation need not any additional requirement and repacking to hoisting crane, field work reliability height is not subjected to a kind of arc strain-type limiter of moment of electric noise of the electric equipment of operating mode.
For finishing the above-mentioned technical scheme that purpose adopted: the utility model is to manufacture and design according to the stress and strain in the certain material ranges of Hooke's law is proportional, arc strain-type limiter of moment is installed in the suitable position of tower crane.
An arc steel plate is set on the tower crane main chord, its two ends are fixedly welded on the tower crane main chord, establish one or two governing screw in the middle of the arc steel plate, the travel switch support is established in this screw lower end, and be welded in the tower crane main chord, this support fixed journey system switch, the contact of travel switch places the place ahead of governing screw.
The utility model embodiment is described in detail in conjunction with the accompanying drawings.
Fig. 1 is the utility model structural representation.
According to shown in Figure 1, an arc steel plate 1 is set on the tower crane main chord 2, its two ends are fixedly welded on tower crane main chord 2, establish one or two governing screw 4 in the middle of the arc steel plate 1, if two governing screw 4 vertically are arranged in the middle of the steel plate 1, also can place the transversely arranged of steel plate 1 centre, above-mentioned governing screw 4 lower ends are established travel switch support 3 and are welded in tower crane main chord 2, one or two travel switch 5 is fixed in these support 3 upper ends, the contact 6 of travel switch 5 places the place ahead of governing screw 4 corresponding mutually, in order to prevent the open-air wind and rain invasion and attack of travel switch, can put case 7 preventions.Above-mentioned governing screw 4 extending or shortenings, thereby the displacement that stress permissible value that adjusting tower crane maximum load is born and arc steel plate 1 produce, this moment, the contact 6 of travel switch was a dead point, and the end points of governing screw 4 is a moving contact, the weight of slinging when tower crane is 90% of rated weight, the strain of arc steel plate 1 makes intermediate regulations screw 4 outwards produce a displacement, screw 4 ends are that moving contact contacts with travel switch contact 6, send warning, travel switch 5 is by lead connecting circuit warning device.When the weight of slinging exceeds rated weight, corresponding another travel switch contact of another governing screw 4 contacts then, causing cutting off the electricity supply stops lifting.
When lifting,, make arc steel plate 1 strengthen strain, so the utility model better performances has guaranteed the loading and unloading of tower crane safety because the vibration of wind-force or equipment makes hoisting crane add the power of an external factor, and the power of this external factor superposes with hanging thing weight.The utility model goes for weight-lifting equipments such as driving equally.

Claims (3)

1, a kind of arc strain-type limiter of moment of forming by support, tower crane main chord, it is characterized in that being provided with on the tower crane main chord 2 an arc steel plate 1, its two ends are fixedly welded on tower crane main chord 2, establish 1~2 governing screw 4 in the middle of the arc steel plate 1, travel switch support 3 is established in these governing screw 4 lower ends, be fixedly welded on tower crane main chord 2, support 3 fixed journey system switches 5, the contact 6 of travel switch 5 places the place ahead of governing screw 4.
2, arc strain-type limiter of moment according to claim 1 is characterized in that arc steel plate 1 middle two governing screw 4, places the vertical of arc steel plate 1.
3, arc strain-type limiter of moment according to claim 1 is characterized in that arc steel plate 1 middle two governing screw 4, places the horizontal of arc steel plate 1.
CN 91215801 1991-08-16 1991-08-16 Bow-shaped strain type moment limiter Withdrawn CN2097200U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 91215801 CN2097200U (en) 1991-08-16 1991-08-16 Bow-shaped strain type moment limiter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 91215801 CN2097200U (en) 1991-08-16 1991-08-16 Bow-shaped strain type moment limiter

Publications (1)

Publication Number Publication Date
CN2097200U true CN2097200U (en) 1992-02-26

Family

ID=4923827

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 91215801 Withdrawn CN2097200U (en) 1991-08-16 1991-08-16 Bow-shaped strain type moment limiter

Country Status (1)

Country Link
CN (1) CN2097200U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100410162C (en) * 2005-07-04 2008-08-13 谭英强 Tower type crane
CN102095361A (en) * 2010-11-18 2011-06-15 山西省电力公司电力科学研究院 Automatic monitoring and alarming device based on large strain of power transmission steel tower
WO2013033904A1 (en) * 2011-09-08 2013-03-14 长沙中联重工科技发展股份有限公司 Method and device for measuring lifting moment of tower crane and monitoring system
CN108128716A (en) * 2018-02-01 2018-06-08 徐州建机工程机械有限公司 A kind of tower crane moment limiter and its safety control system, method
CN111332966A (en) * 2020-02-28 2020-06-26 徐州建机工程机械有限公司 Tower crane double-safety control system and method based on moment and weight

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100410162C (en) * 2005-07-04 2008-08-13 谭英强 Tower type crane
CN102095361A (en) * 2010-11-18 2011-06-15 山西省电力公司电力科学研究院 Automatic monitoring and alarming device based on large strain of power transmission steel tower
WO2013033904A1 (en) * 2011-09-08 2013-03-14 长沙中联重工科技发展股份有限公司 Method and device for measuring lifting moment of tower crane and monitoring system
CN108128716A (en) * 2018-02-01 2018-06-08 徐州建机工程机械有限公司 A kind of tower crane moment limiter and its safety control system, method
CN108128716B (en) * 2018-02-01 2024-05-28 徐州建机工程机械有限公司 Tower crane moment limiter and safety control system and method thereof
CN111332966A (en) * 2020-02-28 2020-06-26 徐州建机工程机械有限公司 Tower crane double-safety control system and method based on moment and weight

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C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee