CN208907003U - A kind of device improving prestressing force crane arm tower crane stress - Google Patents
A kind of device improving prestressing force crane arm tower crane stress Download PDFInfo
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- CN208907003U CN208907003U CN201821597945.6U CN201821597945U CN208907003U CN 208907003 U CN208907003 U CN 208907003U CN 201821597945 U CN201821597945 U CN 201821597945U CN 208907003 U CN208907003 U CN 208907003U
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- crane arm
- crane
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- jib
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Abstract
The utility model discloses a kind of devices for improving prestressing force crane arm tower crane stress, including slewing tower, counterweight, counter-jib, crane arm, support rod, balance arm brace, crane arm short rod, crane arm long draw and pull rod, counter-jib and crane arm are set to the top of slewing tower, counter-jib includes balance arm roots section and counter-jib end section, end section and the lower end that root is saved are hinged, counterweight is fixedly connected on counter-jib end section, one end of support rod and the upper end of slewing tower connect, the other end respectively with balance arm brace, crane arm short rod, the connection of crane arm long draw, the other end of balance arm brace is connected on the section of counter-jib end, the other end of crane arm short rod and crane arm long draw is connect with the middle part of crane arm and end respectively, one end is saved with counter-jib end and is connect in one end of pull rod, the other end and counter-jib Root section upside connection.The utility model improves the stress of prestressing force crane arm tower crane.
Description
Technical field
The utility model relates to crane technical fields, more particularly to a kind of improvement prestressing force crane arm tower crane stress
Device.
Background technique
As country's increasing is built in the investment and assembled of the engineerings such as communications and transportation, hydraulic and hydroelectric engineering, high-speed rail, electric power
The fast development built, while increasing to tower crane demand, the requirement to tower crane is also higher and higher.It is required that the work of tower crane
While amplitude and the weight for significantly locating lifting are increasing, also to guarantee that installation and removal are convenient.The lifting of flat-top tower crane
Arm is static determinacy cantilever design, and cantilever crane may be implemented and dismount in the air, can reduce group towers work height, and cantilever crane dismounts whole with cantilever crane in the air
Body lifting is compared, and the requirement to lifting equipment substantially reduces, and can save dismounting expense, so the application of flat-top tower crane is more and more wider
It is general.But flat-top tower crane is larger compared with the derrick runway girder steel using amount of same performance, and the moment of flexure for causing crane arm downward is larger, weakens flat
The elevating capacity of head tower crane.So one kind occur not only had had the advantages that flat-top tower crane but also can improve flat-top tower crane crane arm mechanics
The prestressing force crane arm tower crane of performance.This prestressing force crane arm tower crane is to apply a prestressing force to flat-top tower crane crane arm,
Reduce or eliminate the moment of flexure brought by crane arm is self-possessed, the rated load weight of the flat-top tower crane of isoform number can be made more
Greatly, that is to say, that the prestressing force crane arm tower crane of same rated load weight is few more many than flat-top tower crane crane arm steel using amount, reaches
The effect of tower crane optimization design.But be not consider the operating conditions such as Condition of Sudden Unloading in design process, if prestressing force crane arm tower
The special operation conditions such as Condition of Sudden Unloading or wire cable rupture occur in the process of running for machine, due to upward prestressing force and Condition of Sudden Unloading
The upward impact force of bring is very big, due to the flat-top tower crane relative to same rated load weight, prestressing force crane arm tower crane knot
Structure size and steel using amount single limb intensity that becomes smaller are lower, so crane arm is easy to happen larger deformation, and strut and counterweight are all hinges
Branch, once deformation occurs for crane arm, strut and counterweight also can deflect or be displaced, and can overall structure be deformed, cause
Tower crane is destroyed, tumbles.If it is considered that reducing under the premise of not changing structure or device when the operating conditions such as Condition of Sudden Unloading
Influence of the prestressing force to crane arm, to the effect of optimization of crane arm with regard to bad.
Utility model content
It is above-mentioned existing to solve the purpose of the utility model is to provide a kind of device for improving prestressing force crane arm tower crane stress
The problem of with the presence of technology, guarantees not considering the prestressing force crane arm tower crane of Condition of Sudden Unloading operating condition in spies such as Condition of Sudden Unloading when design
Different operating condition lower prestress crane arm tower crane can work normally.
To achieve the above object, the utility model provides following scheme:
The utility model provide it is a kind of improve prestressing force crane arm tower crane stress device, including slewing tower, counterweight,
Counter-jib, crane arm, support rod, balance arm brace, crane arm short rod, crane arm long draw and pull rod, the counter-jib and
The crane arm is connected with each other, and the top of the slewing tower is connect with the junction of the counter-jib and the crane arm, institute
Stating counter-jib includes counter-jib end section and balance arm roots section, and one end that the counterweight and the counter-jib end are saved is fixed to be connected
It connects, one end of the support rod is connect with the upper end of the slewing tower or the counter-jib or the crane arm, the balance
One end of arm brace is connect with one end that the counter-jib end is saved, one end of the crane arm short rod and the lifting brachium
One end of pull rod is connect with the middle part of the crane arm and end respectively, the other end, the crane arm of the balance arm brace
The other end of the other end of short rod and the crane arm long draw is connect with the other end of the support rod, the pull rod
One end is connect with one end that the counter-jib end is saved, the other end of the counter-jib end section and the other end point of the pull rod
It is not connect with the downside of the balance arm roots section and upside.
Preferably, the pull rod includes the first pull rod and the second pull rod, and one end of first pull rod and described second are drawn
One end of bar is hinged, and the other end of first pull rod and one end that the counter-jib end is saved are hinged, second pull rod
The upside of the other end and the balance arm roots section is hinged.
Preferably, under working condition, first pull rod and second pull rod are in relaxed state, under off working state
Or in the case where Condition of Sudden Unloading, first pull rod and second pull rod are in tensioning state.
Preferably, one end of the counter-jib end section is successively arranged the first otic placode and the second otic placode from left to right, described
One end of first otic placode and the balance arm brace is hinged, and the other end of second otic placode and first pull rod is hinged.
Preferably, the upside of the balance arm roots section is equipped with third otic placode, the third otic placode and second pull rod
The other end it is hinged.
Preferably, the downside of the balance arm roots section is equipped with the 4th otic placode, the 4th otic placode and the counter-jib end
The other end of portion's section is hinged.
Preferably, the middle part of the crane arm is equipped with the 5th otic placode, the 5th otic placode and the crane arm short rod
One end is hinged.
Preferably, the end of the crane arm is equipped with the 6th otic placode, the 6th otic placode and the crane arm long draw
One end is hinged.
The utility model achieves following technical effect compared with the existing technology:
1, it by adding pull rod between the counterweight of counter-jib and balance arm roots section, in working condition, is carried with hanging
Gradually increase, the stress of pull rod is gradually reduced, and when pull rod does not stress, and Condition of Sudden Unloading occurs, pre- is answered due to upward
The impact force of power and Condition of Sudden Unloading, so that crane arm is by upward deformation, when crane arm does not have deformation, pull rod does not stress, lifting
Arm slightly deformation pull rod will provide a biggish pulling force, so that the displacement of support rod and counterweight is limited, so that being applied to
Prestressing force on weighing arm, which reduces, perhaps to be eliminated due to reducing or losing prestressed effect, crane arm can self weight etc. to
Under power effect under, so that crane arm is returned to original position, achieve the purpose that cope with the operating conditions such as Condition of Sudden Unloading.
2, the stress condition of the operating conditions lower prestress crane arm tower crane such as Condition of Sudden Unloading, wire cable rupture, Ji Nengbao are improved
The complete optimization of crane arm is demonstrate,proved, and does not influence the normal operation of prestressing force crane arm tower crane, and can be in operating conditions such as Condition of Sudden Unloading
Lower reduction or elimination prestressing force bring negative effect, guarantee the prestressing force crane arm for not considering Condition of Sudden Unloading operating condition when design
Tower crane can be worked normally in the special operation conditions lower prestress crane arm tower crane such as Condition of Sudden Unloading.
3, prestressing force crane arm tower crane is optimized in the unloaded state, the excessive problem of stress at cargo boom root, so that
Prestressing force crane arm tower crane can be applied in more occasions, faced various operating conditions, expanded the application range of whole device.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is that the utility model improves the structural representation of the device of prestressing force crane arm tower crane stress in the operating condition
Figure；
Fig. 2 is the partial enlarged view of I in Fig. 1；
Fig. 3 is that the utility model improves the device of prestressing force crane arm tower crane stress in a non-operative state or Condition of Sudden Unloading
Or the structural schematic diagram in the case where wire cable rupture；
Fig. 4 is the partial enlarged view of II in Fig. 3；
Wherein: the first otic placode of 1-, 2- pull rod, 3- balance arm brace, 4- support rod, 5- crane arm short rod, 6- crane arm
Long draw, the 6th otic placode of 7-, 8- crane arm, the 5th otic placode of 9-, 10- slewing tower, 11- balance arm roots section, 12- counterweight,
The second otic placode of 13-, 14- third otic placode, the 4th otic placode of 15-, 16- counter-jib end section, the first pull rod of 17-, the second pull rod of 18-.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise not made the creative labor
Under every other embodiment obtained, fall within the protection scope of the utility model.
In the description of the utility model it is to be appreciated that term " on ", "lower", " left side " and " right side " instruction orientation or
Positional relationship is orientation and positional relationship based on the figure, it is only for facilitate the structurally and operationally mode of description, and
It is not to indicate or imply that signified part must have a particular orientation, with the operation of specific orientation, thus should not be understood as
Limitations of the present invention.
The purpose of the utility model is to provide a kind of devices for improving prestressing force crane arm tower crane stress, to solve existing skill
Art there are the problem of, in the case where optimizing light condition, cargo boom root stress simultaneously, also can guarantee and not consider to unload suddenly when design
The prestressing force crane arm tower crane for carrying operating condition can be worked normally in the special operation conditions lower prestress crane arm tower crane such as Condition of Sudden Unloading.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
It is as Figure 1-Figure 4: to present embodiments provide a kind of device for improving prestressing force crane arm tower crane stress, turret
Body 10, counterweight 12, counter-jib, crane arm 8, support rod 4, balance arm brace 3, crane arm short rod 5,6 and of crane arm long draw
Pull rod 2, counter-jib and crane arm 8 are connected with each other, and the top of slewing tower 10 is connect with the junction of counter-jib and crane arm 8,
Counter-jib includes counter-jib end section 16 and balance arm roots section 11, the fixed company in one end of counterweight 12 and counter-jib end section 16
It connects, the downside of the other end and balance arm roots section 11 of counter-jib end section 16 is hinged.One end of support rod 4 and slewing tower 10
Or the upper end connection of counter-jib or crane arm 8, the one end for balancing arm brace 3 are connect with one end of counter-jib end section 16, lifting
One end of arm short rod 5 and one end of crane arm long draw 6 are connect with the middle part of crane arm 8 and end respectively, balance arm brace 3
The other end, the other end of crane arm short rod 5 and the other end of crane arm long draw 6 connect with the other end of support rod 4.
One end of pull rod 2 is connect with one end of counter-jib end section 16, and the upside of the other end and balance arm roots section 11 of pull rod 2 connects
It connects.Improve prestressing force crane arm tower crane stress device by counterweight 12 and balance arm roots section 11 between add pull rod 2, with
Guarantee not considering the prestressing force crane arm tower crane of Condition of Sudden Unloading operating condition in the special work such as Condition of Sudden Unloading or wire cable rupture when design
Condition lower prestress crane arm tower crane can work normally.
Specifically, pull rod 2 includes the first pull rod 17 and the second pull rod 18, one end of the first pull rod 17 and the second pull rod 18
One end is hinged, and one end of the other end of the first pull rod 17 and counter-jib end section 16 is hinged, the other end of the second pull rod 18 and flat
The upside of weighing apparatus arm roots section 11 is hinged.As Figure 1-Figure 2, prestressing force crane arm tower crane in the operating condition, the first pull rod 17
Relaxed state is in the second pull rod 18；As Figure 3-Figure 4, prestressing force crane arm tower crane is unloaded in a non-operative state or suddenly
In the case where load, the first pull rod 17 and the second pull rod 18 are in tensioning state.It should be noted that in the specific implementation, pull rod
It is not limited only to above-mentioned setting, pull rod not only can be set into two, can also be arranged to a flexible link or be replaced with wirerope
, while the radical of pull rod can also be two or more, be flexible connection between two adjacent pull rods, concrete condition is depending on applying
Depending on a variety of materials such as work condition.
One end of counter-jib end section 16 is successively arranged the first otic placode 1 and the second otic placode 13 from left to right, the first otic placode 1 with
The one end for balancing arm brace 3 is hinged, and the other end of the second otic placode 13 and the first pull rod 17 is hinged.It should be noted that the first ear
Plate 1 and the second otic placode 13 or same otic placode so that the other end of one end of balance arm brace 3 and the first pull rod 17 with
Same otic placode is hinged, and concrete condition is depending on the specific location and stress condition of the first otic placode and the second otic placode.Counter-jib
The upside of root section is equipped with third otic placode 14, and third otic placode 14 and the other end of the second pull rod 18 are hinged.Balance arm roots section
Downside is equipped with the 4th otic placode 15, and the other end of the 4th otic placode 15 and counter-jib end section 16 is hinged.The middle part of crane arm 8 is equipped with the
Five otic placodes 9, one end of the 5th otic placode 9 and crane arm short rod 5 are hinged.The end of crane arm 8 is equipped with the 6th otic placode 7, the 6th ear
Plate 7 and one end of crane arm long draw 6 are hinged.
The course of work for improving the device of prestressing force crane arm tower crane stress in the present embodiment is as follows: in prestressing force crane arm
Pull rod 2 is added between the counterweight 12 and balance arm roots section 11 of tower crane, when prestressing force crane arm tower crane is not hanging load i.e. in non-
When working condition, it is certainly heavily loaded much larger than crane arm 8 to the pulling force of crane arm 8 that counterweight 12 is applied to the prestressing force on crane arm 8
Lotus, pull rod 2 is in tensioning state at this time, to reduce the prestressing force being applied on crane arm 8 under off working state, and then reduces
Maximum stress at 8 arm root of crane arm；When prestressing force crane arm tower crane is in running order, with hanging gradually increasing for load,
The stress of pull rod 2 is gradually reduced, and the prestressing force that counterweight 12 is applied on crane arm 8 is gradually increased, until all prestressing force is complete
Portion is applied on crane arm 8, and pull rod 2 exits working condition, and pull rod 2 is in relaxed state at this time；Once there is the work of Condition of Sudden Unloading
Condition occurs, and support rod 4 and counterweight 12 have the trend for deflecting or being displaced, and 2 moment of pull rod starts stress and be in open at this time
Tight state is applied on crane arm 8 by preventing support rod 4 and counterweight 12 from deflecting or be displaced the tension of pull rod 2 with reducing
Prestressing force and upward impact force to the stress at 8 arm root of crane arm.
The device of improvement prestressing force crane arm tower crane stress in the present embodiment passes through in counterweight 12 and balance arm roots section
Pull rod 2 is added between 11, under rated load working condition, crane arm 8 does not have do not have deformation when Condition of Sudden Unloading, pull rod 2 not by
Power, in Condition of Sudden Unloading generating process, the slightly deformation pull rod 2 of crane arm 8 will provide a biggish pulling force, to limit branch
The displacement of strut 4 and counterweight 12, at this point, support rod 4 and counterweight 12 are not also displaced, make even if crane arm 8 has upward deformation
It obtains the prestressing force on crane arm 8 to reduce or eliminate, crane arm 8 can be such that crane arm 8 returns in the case where the downward power such as self weight acts on
Position originally achievees the purpose that cope with the operating conditions such as Condition of Sudden Unloading；Improve the device and method of prestressing force crane arm tower crane stress
The stress condition for improving the operating conditions lower prestress crane arm tower crane such as Condition of Sudden Unloading or wire cable rupture, both can guarantee crane arm 8
Complete optimization, and do not influence the normal operation of prestressing force crane arm tower crane, and can reduce under the operating conditions such as Condition of Sudden Unloading or
Person eliminates the negative effect of prestressing force bring, ensure that and does not consider that the prestressing force crane arm tower crane of Condition of Sudden Unloading operating condition exists when design
The special operation conditions lower prestress crane arm tower crane such as Condition of Sudden Unloading can work normally；Light condition lower prestress is optimized to lifting
Maximum stress at arm arm root；Prestressing force crane arm tower crane can be applied in more occasions, and various operating conditions are faced, and be expanded entire
The application range of device.
It applies specific case in this specification to be expounded the principles of the present invention and embodiment, the above reality
The explanation for applying example is merely used to help understand the method and its core concept of the utility model；Meanwhile for the general of this field
Technical staff, based on the idea of the present invention, there will be changes in the specific implementation manner and application range.To sum up institute
It states, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. it is a kind of improve prestressing force crane arm tower crane stress device, it is characterised in that: including slewing tower, counterweight, counter-jib,
Crane arm, support rod, balance arm brace, crane arm short rod, crane arm long draw and pull rod, the counter-jib and the lifting
Arm is connected with each other, and the top of the slewing tower is connect with the junction of the counter-jib and the crane arm, the counter-jib
Arm roots section is saved and balanced including counter-jib end, and the counterweight is fixedly connected with one end that the counter-jib end is saved, described
One end of support rod is connect with the upper end of the slewing tower or the counter-jib or the crane arm, the balance arm brace
One end is connect with one end that the counter-jib end is saved, and the one of one end of the crane arm short rod and the crane arm long draw
End connect with the middle part of the crane arm and end respectively, described to balance the other end of arm brace, the crane arm short rod
The other end of the other end and the crane arm long draw is connect with the other end of the support rod, one end of the pull rod and institute
State one end connection of counter-jib end section, the other end of the other end of counter-jib end section and the pull rod respectively with it is described
The downside of balance arm roots section is connected with upside.
2. the device according to claim 1 for improving prestressing force crane arm tower crane stress, it is characterised in that: the pull rod packet
The first pull rod and the second pull rod are included, one end of first pull rod and one end of second pull rod are hinged, first pull rod
One end for saving of the other end and the counter-jib end it is hinged, the other end of second pull rod and the balance arm roots section
Upside is hinged.
3. the device according to claim 2 for improving prestressing force crane arm tower crane stress, it is characterised in that: working condition
Under, first pull rod and second pull rod are in relaxed state, described under off working state or in the case where Condition of Sudden Unloading
First pull rod and second pull rod are in tensioning state.
4. the device according to claim 2 for improving prestressing force crane arm tower crane stress, it is characterised in that: the counter-jib
One end of end section is successively arranged the first otic placode and the second otic placode, first otic placode and the balance arm brace from left to right
One end is hinged, and the other end of second otic placode and first pull rod is hinged.
5. the device according to claim 2 for improving prestressing force crane arm tower crane stress, it is characterised in that: the counter-jib
The upside of root section is equipped with third otic placode, and the other end of the third otic placode and second pull rod is hinged.
6. the device according to claim 1 for improving prestressing force crane arm tower crane stress, it is characterised in that: the counter-jib
The downside of root section is equipped with the 4th otic placode, and the 4th otic placode and the other end that the counter-jib end is saved are hinged.
7. the device according to claim 1 for improving prestressing force crane arm tower crane stress, it is characterised in that: the crane arm
Middle part be equipped with the 5th otic placode, one end of the 5th otic placode and the crane arm short rod is hinged.
8. the device according to claim 1 for improving prestressing force crane arm tower crane stress, it is characterised in that: the crane arm
End be equipped with the 6th otic placode, one end of the 6th otic placode and the crane arm long draw is hinged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821597945.6U CN208907003U (en) | 2018-09-29 | 2018-09-29 | A kind of device improving prestressing force crane arm tower crane stress |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821597945.6U CN208907003U (en) | 2018-09-29 | 2018-09-29 | A kind of device improving prestressing force crane arm tower crane stress |
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| CN208907003U true CN208907003U (en) | 2019-05-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108910729A (en) * | 2018-09-29 | 2018-11-30 | 山东以琳智能科技有限公司 | A kind of device and method improving prestressing force crane arm tower crane stress |
-
2018
- 2018-09-29 CN CN201821597945.6U patent/CN208907003U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108910729A (en) * | 2018-09-29 | 2018-11-30 | 山东以琳智能科技有限公司 | A kind of device and method improving prestressing force crane arm tower crane stress |
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