CN202481970U - Load lifting limiter for tower crane - Google Patents
Load lifting limiter for tower crane Download PDFInfo
- Publication number
- CN202481970U CN202481970U CN2011205460643U CN201120546064U CN202481970U CN 202481970 U CN202481970 U CN 202481970U CN 2011205460643 U CN2011205460643 U CN 2011205460643U CN 201120546064 U CN201120546064 U CN 201120546064U CN 202481970 U CN202481970 U CN 202481970U
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- CN
- China
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- load lifting
- main body
- lifting limiter
- tower crane
- weight
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Abstract
The utility model relates to a load lifting limiter for a tower crane. The load lifting limiter for the tower crane has a function of limiting load lifting of the tower crane, avoids overload work of the tower crane and motor overload and can output electric signals capable of reflecting weight of all heavy objects below rated lifting weight. The load lifting limiter comprises a pulley, force measuring rings and controllers. Each force measuring ring is formed by an upper ear plate, a lower ear plate, a main body and a baffle, wherein the upper ear plate and the lower ear plate are connected with the upper end and the lower end of the main body, and the main body is connected with the baffle. Strain gauges are vertically and bilaterally symmetrically installed on inner walls of the main body, the controllers are arranged in the middle inside the main bodies, and the pulley is located between the two force measuring rings and is connected with the lower ear plates positioned in the two force measuring rings through wheel axles. The load lifting limiter has the advantages that first a weighing function can be achieved, and actual weight of all the heavy objects is displayed; second a digital circuit is adopted, and protecting precision is high; third password protection is arranged for parameters of protecting values, and the protecting values can be adjusted only by inputting password; and fourth the load lifting limiter is flexible to apply and can be suitable for different tower cranes only by adjusting the parameters of the protecting values.
Description
Technical field
This practicality relates to a kind of function that had both played restriction tower machine lifting weight; Prevent tower machine overload work, motor overload; The exportable tower machine load lifting limiter that can react the electric signal of all weight of heavy under the rated load weight belongs to tower machine load lifting limiter and makes the field.
Background technology
Publication number CN2070291, " a kind of load lifting limiter ", it mainly is made up of ring body, shell fragment and control setup.The utility model is installed in the two ends of lifting sheave shaft.When lifting, the micro-switch of installing on the support shell fragment in the ring body and can set up screw and collide can be noted the deflection size at any time, during the lifting overload, can cut off the power supply automatically, sends alerting signal, stops to hoist protection tower machine equipment.Its weak point is: survey precision is not high, and limitation function is reliable inadequately, and reacts insensitive, makes the tower machine have the overweight potential safety hazard of bringing in the course of the work.
The utility model content
Design goal: avoid the weak point in the above-mentioned background technology; Design a kind of function that not only has the work speed of restriction tower machine lifting weight and adjustment Lift Mechanism in Power Hoist; And measure accurately, limitation function is reliable, can prevent that steel rope from jumping out the tower machine load lifting limiter of pulley.
Design plan: in order to realize above-mentioned design goal.The utility model is on structure design, and this load lifting limiter is applied on the tower crane, and radical function is the function that plays restriction tower machine lifting weight, and additional function is the work speed of adjustment Lift Mechanism in Power Hoist; When being raised weight of heavy and surpassing the specified hoisting capacity of tower machine, load lifting limiter is realized limitation function immediately, prevents tower machine overload work.When being raised weight and reaching constant weight, load lifting limiter can realize adjusting the function of machine operation speed, prevents motor overload.Secondly, the exportable electric signal that can react all weight of heavy under the rated load weight of this load lifting limiter, its electric signal way of output can be selected the output of 0-20mA electric current; Perhaps 0-5V, the output of 0-10V vdc; Perhaps can select 0-10mv micro voltage signal output.
Technical scheme: tower machine load lifting limiter; It comprises pulley, proving ring and controller, and said proving ring is made up of upper and lower otic placode, main body and baffle plate, and upper and lower otic placode is connected with the main body upper and lower side; Main body is connected with baffle plate; Main body inner wall is symmetrically installed with strain gage up and down, and controller is positioned at the middle part of main body, and pulley is arranged between two proving rings and through wheel shaft and is connected with the lower ear plate of two proving rings.
This practicality is compared with background technology, and the one, can realize function of weighing, show the actual weight value of all weights; The 2nd, adopt digital circuit, the protection precision is high; The 3rd, the parameter of protection value is provided with cryptoguard, has only the adjustment that the correct password of input just can the value of protection; The 4th, applying flexible only needs adjustment protection value parameter promptly applicable to different tower machines.
Description of drawings
Fig. 1 is the structural representation of tower machine load lifting limiter.
Fig. 2 is the block diagram of tower machine load lifting limiter.
Fig. 3 is the lateral plan of tower machine load lifting limiter.
The specific embodiment
Embodiment 1: with reference to accompanying drawing 1～3.A kind of tower machine load lifting limiter; It comprises pulley 1, proving ring 2 and controller 3, and said proving ring 2 is made up of upper and lower otic placode 4 and 5, main body 6 and baffle plate 9, and upper and lower otic placode 4 is connected with main body 6 upper and lower sides with 5; Main body 6 is connected with baffle plate 9; Main body 6 inwalls are symmetrically installed with strain gage 7 up and down, and controller 3 is positioned at the middle part of main body 6, and pulley 1 is arranged in 2 of two proving rings and is connected with the lower ear plate 5 of two proving rings through wheel shaft 8.Said two proving rings 2 adopt anti-rope skipping pin 10 to connect.It makes principle: when being raised weight of heavy and surpassing the specified hoisting capacity of tower machine, load lifting limiter is realized limitation function immediately.Concrete implementation is to convert the micro-deformation of proving ring itself electric signal of variation to through strain gage, and " the incoming signal processing unit " in this electric signal via controller amplifies, conversion, and becoming can be by the signal of CPU understanding.CPU is according to the setting of rules of order with artificial parameter, and the work of controlling three relays whether.
Example 1: the nominal operation weight of load lifting limiter is 6 tons.Surpass 6 ton hours when controller detects actual load, just drive a relay at once, make it get into mode of operation, also break off at once with this series connected motor control loop in actuating of relay contact, the motor power supply is broken off, and the lifting operating mode of weight stops immediately; Like this, just played the function of the maximum hoisting weight of restriction tower machine.
Example 2: the high speed limit weight of load lifting limiter is 3 tons (weight surpasses 3 tons, and motor can not get into the high-speed cruising state).When detecting actual load, controller surpasses 3 ton hours; Just drive a relay at once, make it get into mode of operation, also break off at once with this actuating of relay contact series connected motor high-speed cruising control loop; The motor high-speed cruising breaks off, and the lifting operating mode of weight is reduced to low speed immediately; Like this, just played the function of the work speed of adjustment Lift Mechanism in Power Hoist.
What need understand is: though the foregoing description is to this practical mentality of designing detailed text description of contrasting; But these text descriptions; Just the simple text of this practical design thinking is described; Rather than to the restriction of this practical design thinking, any combination, increase or modification that does not exceed this practical design thinking all falls in this practical protection domain.
Claims (2)
1. tower machine load lifting limiter; It comprises pulley, proving ring and controller, it is characterized in that: said proving ring is made up of upper and lower otic placode, main body and baffle plate, upper and lower otic placode be connected with the main body upper and lower side; Main body is connected with baffle plate; Main body inner wall is symmetrically installed with strain gage up and down, and controller is positioned at the middle part of main body, and pulley is arranged between two proving rings and through wheel shaft ⑻ and is connected with the lower ear plate of two proving rings.
2. tower machine load lifting limiter according to claim 1 is characterized in that: said two proving rings adopt anti-rope skipping pin to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205460643U CN202481970U (en) | 2011-12-23 | 2011-12-23 | Load lifting limiter for tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205460643U CN202481970U (en) | 2011-12-23 | 2011-12-23 | Load lifting limiter for tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202481970U true CN202481970U (en) | 2012-10-10 |
Family
ID=46956409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205460643U Expired - Fee Related CN202481970U (en) | 2011-12-23 | 2011-12-23 | Load lifting limiter for tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202481970U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076127A (en) * | 2012-12-28 | 2013-05-01 | 三一集团有限公司 | Pin roll detection device and engineering machine provided with same |
| CN109956406A (en) * | 2019-04-24 | 2019-07-02 | 浙江杰特工贸股份有限公司 | A kind of intelligent electric lifting device |
-
2011
- 2011-12-23 CN CN2011205460643U patent/CN202481970U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076127A (en) * | 2012-12-28 | 2013-05-01 | 三一集团有限公司 | Pin roll detection device and engineering machine provided with same |
| CN103076127B (en) * | 2012-12-28 | 2014-12-10 | 三一集团有限公司 | Pin roll detection device and engineering machine provided with same |
| CN109956406A (en) * | 2019-04-24 | 2019-07-02 | 浙江杰特工贸股份有限公司 | A kind of intelligent electric lifting device |
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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: 20121010 Termination date: 20151223 |
|
| EXPY | Termination of patent right or utility model |