CN103569867B - Hoisting machinery arm support side-tipping monitoring equipment, system and method and engineering machinery - Google Patents
Hoisting machinery arm support side-tipping monitoring equipment, system and method and engineering machinery Download PDFInfo
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- CN103569867B CN103569867B CN201310572525.8A CN201310572525A CN103569867B CN 103569867 B CN103569867 B CN 103569867B CN 201310572525 A CN201310572525 A CN 201310572525A CN 103569867 B CN103569867 B CN 103569867B
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Abstract
The invention discloses equipment, a system and a method for monitoring the side inclination of a hoisting mechanical arm support and engineering machinery, wherein the method comprises the following steps: calculating the total side-tipping moment of a beam of the hoisting mechanical arm support; receiving the current rotation angle of the arm support; determining a critical roll moment corresponding to the current cornering angle; comparing the total roll moment with a critical roll moment, in the case where the total roll moment is greater than a first predetermined roll moment, performing at least one of: controlling an alarm device to alarm; controlling the hoisting machinery to stop working; the first predetermined roll moment is the critical roll moment multiplied by a first predetermined percentage. According to the invention, the operation of the hoisting machinery is controlled according to the total roll moment of the beam obtained by calculating the strain value measured by the strain sensor arranged on the beam of the hoisting machinery arm support, the calculation method is simple, the monitoring mode is direct and effective, the accuracy detection of the roll safety of the hoisting machinery arm support is realized, and the measurement precision of the roll moment of the arm support is improved.
Description
Technical field
The present invention relates to the elevator machinery field of construction machinery and equipment, particularly, relate to a kind of elevator machinery jib and roll watch-dog, system, method and construction machinery and equipment.
Background technology
Elevator machinery is in goods lifting process, in jib turning course or ground is uneven, when being subject to wind moment, jib will be subject to the effect of bank moment, hoisting machinery or hoister in large tonnage tool is erected for long-armed, the impact of bank moment is more obvious, may cause the safety misadventures such as rollover time serious.Therefore, detect extremely important to the direct actv. of elevator machinery jib bank moment.
In prior art, the detection of the jib inclination secure context of elevator machinery realizes mainly through following methods: 1, be arranged symmetrically with tensioner at jib offside, wherein, this tensioner comprises tension rail and tension ropes, and pulling force sensor of connecting in tension ropes, thus obtain jib bank moment value; 2, detecting unit is set on elevator machinery, this detecting unit comprises jib linear transducer, jib angular transducer, jib rotary speed sensor, lift heavy lifting velocity sensor, lift heavy pressure sensor, jib base level indicator and anemoscope, calculates jib bank moment value by the observed reading of these sensors; 3, oil pressure pressure sensor is set on crane rotation motor, calculates jib bank moment value by the difference of pressure passing in and out oil.
The equipment of the jib bank moment that the calculating that above technical scheme provides is made up of truss arm, complex structure, and have impact to the strength and stability of jib, and need to re-start the unit design of jib to check or improve.In addition, calculate bank moment by the levelness sensor of jib base, jib Position and attitude sensor and lift heavy load transducer or motor oil pressure sensor, measure accumulated error large, add calculation error, be difficult to the accuracy ensureing result of a measurement.In addition, generally, elevator machinery jib comprise two to and two to above to curb girder, and often pair of size and Orientation to the bank moment of each beam in curb girder may be different, so to be necessary a pair that calculates elevator machinery jib as required or more the total bank moment to curb girder.
Summary of the invention
The object of this invention is to provide a kind of elevator machinery jib and roll watch-dog, system, method and construction machinery and equipment, for solving the problem of the safety detection that elevator machinery jib rolls.
To achieve these goals, the invention provides a kind of equipment of total bank moment of the beam for calculating elevator machinery jib, this equipment comprises: receiving device, for receive described jib at least one pair of to the strain value of curb girder, this strain value at least comprise described at least one pair of to the right side strain value of the left side strain value of the beam in curb girder and a beam relative with this beam; And computer device, for according to described strain value, described at least one pair of to the distance between the sectional area of curb girder and offside neutral axis of the beam, calculate total bank moment.
Correspondingly, present invention also offers a kind of elevator machinery jib and roll watch-dog, this equipment comprises: the equipment of total bank moment of the above-mentioned beam for calculating elevator machinery jib, and wherein said receiving device is also for receiving the current degreeof turn of described jib; And control setup, for: determine the critical bank moment corresponding with described current degreeof turn; And described total bank moment and described critical bank moment are contrasted, and when described total bank moment is greater than the first predetermined bank moment, perform at least one in following operation: control warning device and report to the police; And control elevator machinery quits work; Wherein, described first predetermined bank moment is that described critical bank moment is multiplied by the first predetermined percentage.。
Correspondingly, present invention also offers a kind of elevator machinery jib and roll monitored control system, this system comprises: above-mentioned elevator machinery jib rolls watch-dog; Multiple strain sensor, for measuring described strain value; And angular transducer, for detecting the degreeof turn of described jib.
Correspondingly, present invention also offers a kind of construction machinery and equipment, this project machinery comprises above-mentioned elevator machinery jib and rolls monitored control system.
Correspondingly, present invention also offers a kind of method of total bank moment of the beam for calculating elevator machinery jib, the method comprises: at least one pair of receiving described jib to the strain value of curb girder, this strain value at least comprise described at least one pair of to the right side strain value of the left side strain value of the beam in curb girder and a beam relative with this beam; And according to described strain value, described at least one pair of to the distance between the sectional area of curb girder and offside neutral axis of the beam, calculate total bank moment.
Correspondingly, present invention also offers a kind of elevator machinery jib and roll method for supervising, the method comprises: the total bank moment calculating the beam of elevator machinery jib according to said method; Receive the current degreeof turn of described jib; Determine the critical bank moment corresponding with described current degreeof turn; And described total bank moment and described critical bank moment are contrasted, and when described total bank moment is greater than the first predetermined bank moment, perform at least one in following operation: control warning device and report to the police; And control elevator machinery quits work; Wherein, described first predetermined bank moment is that described critical bank moment is multiplied by the first predetermined percentage.
Pass through technique scheme, the present invention is according to arranging strain sensor and control the operation of elevator machinery according to total bank moment of the beam of the jib calculated by the strain value measured by this strain sensor on the beam of elevator machinery jib, method of calculating is simple, monitor mode is directly effective, not only achieve accuracy detection elevator machinery jib being rolled to safety, and improve the survey precision of jib bank moment.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the structural representation of the equipment of total bank moment of the beam for calculating elevator machinery jib provided by the invention;
Fig. 2 is the structural representation that elevator machinery jib provided by the invention rolls watch-dog;
Fig. 3 is the structural representation that elevator machinery jib provided by the invention rolls monitored control system;
Fig. 4 schematically shows the schematic diagram arranging strain sensor on the beam of jib;
Fig. 5 is the method flow diagram calculating total bank moment of the beam of elevator machinery jib when receiving the one-sided strain value of beam provided by the invention;
Fig. 6 is the method flow diagram calculating total bank moment of the beam of elevator machinery jib when receiving the bilateral strain value of beam provided by the invention;
Fig. 7 is the diagram of circuit that elevator machinery jib provided by the invention rolls method for supervising; And
Fig. 8 is the diagram of circuit that another hoisting machinery jib provided by the invention rolls method for supervising.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the structural representation of the equipment of total bank moment of the beam for calculating elevator machinery jib provided by the invention, as shown in Figure 1, this equipment being used for total bank moment of the beam calculating elevator machinery jib comprises receiving device 100 and computer device 200, receiving device 100 for receive jib at least one pair of to the strain value of curb girder, computer device 200 is according to this strain value, the total bank moment distance between the sectional area of curb girder and offside neutral axis of the beam being calculated to the beam of jib.
Such as, when receiving device 100 is for receiving the strain value of a pair pair of curb girder of jib, this strain value comprises this to the left side strain value of the beam in curb girder and the right side strain value of a beam relative with this beam, computer device 200 according to this strain value, this is to the total bank moment distance between the sectional area of curb girder and offside neutral axis of the beam being calculated to the beam of jib.
When receiving device 100 is for receiving the strain value of two couples to curb girder of jib, this strain value comprise this two centering at least one pair of to the right side strain value of the left side strain value of the beam in curb girder and a beam relative with this beam, computer device 200 calculates total bank moment according to this strain value, this two couple to the distance between the sectional area of curb girder and offside neutral axis of the beam.
In this, at least one pair of receiving jib can be such as the strain value of a pair pair of curb girder receiving jib to the strain value of curb girder, and two pairs or more that also can receive jib is to the strain value of curb girder.Specifically, when receiving the strain value of a pair pair of curb girder of jib, total bank moment refers to a pair pair of curb girder i.e. total bank moment of two beams of jib, when receiving strain value to curb girder of two pairs or more of jib, total bank moment refers to two pairs or more to curb girder.
For convenience of explanation, hereinafter, the present invention will be described to curb girder for a pair pair of curb girder and two.
Fig. 2 is the structural representation that elevator machinery jib provided by the invention rolls watch-dog, as shown in Figure 2, this elevator machinery jib rolls receiving device 100 and the computer device 200 that watch-dog not only comprises the equipment of total bank moment of the beam for calculating elevator machinery jib, also comprise control setup 300, receiving device 100 is also for receiving the current degreeof turn of jib, first control setup 300 determines the critical bank moment corresponding with current degreeof turn, again total bank moment and critical bank moment are contrasted, and when total bank moment is greater than the first predetermined bank moment, perform at least one in following operation: control warning device (not shown) and report to the police, control elevator machinery quits work.Wherein, one data bank is set in control setup 300, the corresponding relation of degreeof turn and critical bank moment is stored in this data bank, and critical bank moment refers to the maximum bank moment that jib can bear at this degreeof turn when being in a certain degreeof turn.Critical bank moment can be obtained by theory calculate, finite element simulation or experiment.Bank moment is the moment caused by side force.
Specifically, receiving device 100 receive jib at least one pair of to the current degreeof turn of the strain value of curb girder and jib after, first total bank moment is calculated by computer device 200, from data bank, the corresponding critical bank moment of degreeof turn current with this is found according to current degreeof turn again by control setup 300, then, total bank moment that computer device 200 calculates by control setup 300 and the critical bank moment found from data bank contrast, when total bank moment is greater than the first predetermined bank moment, control setup 300 can control warning device to carry out reporting to the police or control elevator machinery and quits work, or while control warning device carries out reporting to the police, control elevator machinery quit work.
Further, when total bank moment is greater than the first predetermined bank moment, if total bank moment is less than or equal to the second predetermined bank moment, then control setup 300 can only control warning device and reports to the police, if total bank moment is greater than the second predetermined bank moment, then control setup 300 can only control elevator machinery and quits work.Not only certainly, the present invention is not limited to this, and such as, when total bank moment is greater than the second predetermined bank moment, control setup 300 also can control warning device to carry out reporting to the police but also control elevator machinery and quit work.
Wherein, the first predetermined bank moment is that described critical bank moment is multiplied by the first predetermined percentage, and the second predetermined bank moment is that critical bank moment is multiplied by the second predetermined percentage, and in this, the second predetermined percentage is greater than the first predetermined percentage.
Under preferable case, the first predetermined percentage can be set as 80%, and the second predetermined percentage can be set as 90%, it will be appreciated by persons skilled in the art that the first predetermined percentage and the second predetermined percentage can adjust according to actual conditions.
Wherein, the work that control setup 300 stops can for changing the operation of the roll loads of the beam of jib, and such as, jib turns round operation and the operation of hoisting mechanism cargo lifting etc.
Fig. 3 is the structural representation that elevator machinery jib provided by the invention rolls monitored control system, as shown in Figure 3, this system comprises elevator machinery jib and rolls the receiving device 100 of watch-dog, computer device 200 and control setup 300, also comprise multiple strain sensor 400 and angular transducer 500, multiple strain sensor 400 is for measuring the strain value of the beam of jib, and angular transducer 500 is for measuring the degreeof turn of jib.
Wherein, can at least one pair of of jib to curb girder being arranged respectively two strain sensores 400, that is also two strain sensores 400 can be set respectively on four of a jib beam, certainly, a strain sensor 400 also can be set respectively on a pair of jib pair curb girder or a strain sensor 400 is set respectively on four beams of jib.Under preferable case, strain sensor 400 can be arranged on the bottom of the beam of jib, to reach good Detection results.
Strain sensor 400 is can the sensor of monitor strain or stress, such as, and resistance strain gage, fiber Bragg grating strain sensor etc.
Below, the principle of composition graphs 4 to the equipment of total bank moment of the beam for calculating elevator machinery jib is described in detail:
To the situation only arranging strain sensor 400 on a pair pair of curb girder, this is to the beam 401 and 403 referred to curb girder shown in Fig. 4 or beam 402 and 404, Fig. 4 schematically shows the schematic diagram arranging strain sensor 400 on the beam of jib, and, Fig. 4 also schematically shows the strain sensor arranged in the left side of each beam and right side, such as, when strain sensor 401-L is the strain sensor arranged in the left side of beam 401, strain sensor 401-R is the strain sensor arranged on the right side of beam 401.
For the only situation of the strain sensor of the one-sided setting of each beam at least one pair of of jib is to curb girder, the method for calculating of total bank moment is as follows:
Wherein, M
wfor total bank moment of the beam of jib, N is the described logarithm to curb girder, σ
ifor N is to the stress value of i-th beam to curb girder, s
ifor N is to the sectional area of i-th beam to curb girder, L is the distance between the neutral axis of a pair pair of curb girder, and N is positive integer.Wherein, the strain value of this stress value measured by corresponding strain sensor calculates, as strain value be multiplied to a constant after can obtain corresponding stress value.
Here at least one pair of of indication can be a pair pair of curb girder to curb girder, i.e. two beams, also can be two to curb girder, i.e. four beams, for the one-sided situation arranging a strain sensor respectively at a pair pair of curb girder, comprising: on the right side of the left side of beam 401 and beam 403, strain sensor 401-L and 403-R is set respectively; In the left side of the right side of beam 401 and beam 403, strain sensor 401-R and 403-L is set respectively; On the right side of the left side of beam 402 and beam 404, strain sensor 402-L and 404-R is set respectively; In the left side of the right side of beam 402 and beam 404, strain sensor 402-R and 404-L is set respectively.For the one-sided situation arranging a strain sensor respectively at four beams, comprising: strain sensor 401-L, 402-L, 403-R and 404-R are set; And strain sensor 401-R, 402-R, 403-L and 404-L are set.
Bilateral for each beam at least one pair of of jib is to curb girder arranges the situation of strain sensor, computer device 200 is first according to strain value, at least one pair of calculates relative bank moment to the distance between the sectional area of curb girder and offside neutral axis of the beam, then according to strain value, beam is relative to the ultimate range of the point on the interface moment of inertia of its neutral axis and the interface of beam relative to its neutral axis, calculate at least one pair of bank moment to each beam in curb girder, again relative bank moment is added with at least one pair of bank moment sum to each beam in curb girder, obtain total bank moment.
For at least one pair of at jib this to curb girder in the bilateral of each beam the situation of strain sensor is set, the method for calculating of total bank moment is as follows:
Wherein, M
lRfor the relative bank moment to curb girder of jib, N is the described logarithm to curb girder, M
ifor N is to the bank moment of i-th beam to curb girder, M
wfor total bank moment of the beam of jib, σ
si-Land σ
si-Rbe respectively N to the stress value to the stress value on the left of i-th beam of curb girder and right side, s
ifor N is to the sectional area of i-th beam to curb girder, L is the distance between the neutral axis of a pair pair of curb girder, I
ifor N is to i-th beam of curb girder cross sectional moment of inertia relative to its neutral axis,
yimaxfor N is to the ultimate range of the point on the cross section of i-th beam to curb girder relative to its neutral axis, N is positive integer, and wherein said stress value calculates according to strain value.Wherein, when the beam of jib is circular tube shaped,
wherein D
iand d
ibe respectively external diameter and the internal diameter in the cross section of beam.Wherein, the strain value of stress value measured by corresponding strain sensor calculates, as strain value be multiplied to a constant after can obtain corresponding stress value.
In this and above-mentioned at least one pair of is to curb girder each beam one-sided to arrange strain sensor similar, at least one pair of can be a pair pair of curb girder to curb girder, also can be two to curb girder, i.e. four beams.Bilateral at a pair pair of curb girder is arranged respectively to the situation of a strain sensor, comprising: strain sensor 401-L, 401-R, 403-L and 403-R are set respectively at the bilateral of beam 401 and 403; At the bilateral of beam 402 and 404, strain sensor 402-L, 402-R, 404-L and 404-R are set respectively.Bilateral at four beams is arranged respectively to the situation of a strain sensor, for the bilateral at four beams all arranges strain sensor 401-L, 401-R, 403-L, 403-R, 402-L, 402-R, 404-L and 404-R.
Correspondingly, present invention also offers a kind of construction machinery and equipment, this project machinery comprises above-mentioned elevator machinery jib and rolls monitored control system.
Fig. 5 is the method flow diagram calculating total bank moment of the beam of elevator machinery jib when receiving the one-sided strain value of beam provided by the invention, as shown in Figure 5, first at least one pair of receiving jib is to the one-sided strain value of each beam in curb girder, this strain value at least comprises at least one pair of right side strain value to the left side strain value of the beam in curb girder and a beam relative with this beam, then according to this strain value, this at least one pair of to the distance between the sectional area of curb girder and offside neutral axis of the beam, calculate total bank moment.
Fig. 6 is the method flow diagram calculating total bank moment of the beam of elevator machinery jib when receiving the bilateral strain value of beam provided by the invention, as shown in Figure 6, first at least one pair of receiving jib is to the bilateral strain value of each beam in curb girder, then according to this strain value, this at least one pair of relative bank moment is calculated to the distance between the sectional area of curb girder and offside neutral axis of the beam, then according to this strain value, beam is relative to the ultimate range of the point on the cross sectional moment of inertia of its neutral axis and the cross section of beam relative to its neutral axis, calculate at least one pair of bank moment to each beam in curb girder, by relative bank moment, at least one pair of is added the bank moment sum of each beam in curb girder with this again, obtain total bank moment.
The detail of method of total bank moment of the beam of the calculating elevator machinery jib described in Fig. 5 with Fig. 6 is identical with the equipment of total bank moment of the beam for calculating elevator machinery jib, and in this, it will not go into details.
Fig. 7 is the diagram of circuit that elevator machinery jib provided by the invention rolls method for supervising, as shown in Figure 7, elevator machinery jib rolls the step that method for supervising comprises total bank moment of the beam for calculating elevator machinery jib in Fig. 5 or Fig. 6, namely adopt the method for total bank moment of the beam for calculating elevator machinery jib shown in Fig. 5 or Fig. 6 to calculate total bank moment, in addition, further comprising the steps of: to receive the current degreeof turn of jib and determine the critical bank moment corresponding with current degreeof turn according to current degreeof turn, and the total bank moment calculated and determined critical bank moment are contrasted, judge whether total bank moment is greater than the first predetermined bank moment, if total bank moment is greater than the first predetermined bank moment, then control warning device to carry out reporting to the police and/or control elevator machinery and quit work.Wherein, the first predetermined bank moment is that described critical bank moment is multiplied by the first predetermined percentage.
Fig. 8 is the diagram of circuit that another hoisting machinery jib provided by the invention rolls method for supervising, as shown in Figure 8, the method that Fig. 8 provides and Fig. 7 similar, unlike, when total bank moment is greater than the first predetermined bank moment, controls warning device and report to the police, then judge whether total bank moment is greater than the second predetermined bank moment, when total bank moment is greater than the second predetermined bank moment, controls elevator machinery and quit work.Wherein, the first predetermined bank moment is that described critical bank moment is multiplied by the first predetermined percentage, and the second predetermined bank moment is that critical bank moment is multiplied by the second predetermined percentage, and in this, the second predetermined percentage is greater than the first predetermined percentage.
It is corresponding that the detail that the elevator machinery jib provided about Fig. 7 with Fig. 8 of the present invention rolls method for supervising and elevator machinery jib provided by the invention roll watch-dog, repeats no more in this.
It should be noted that, the technical scheme of total bank moment of the beam of above calculating jib provided by the invention is mainly for the truss arm of elevator machinery.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, such as, the arrangement of strain sensor can only be arranged in the bilateral symmetry of two beams of offside; also can only arrange in the outside of four beams, these simple variant all belong to protection scope of the present invention.
By technical scheme provided by the invention, not only can improve the survey precision of elevator machinery jib bank moment, the accuracy to the elevator machinery in use detection of dangerous operation can also be improved, failure-free data more can also be provided for other operations of elevator machinery simultaneously.In addition, metering system provided by the invention is simple, direct, effective, the critical bank moment corresponding to the different degreeof turns of jib is adopted to carry out security monitoring to hoisting crane, more tally with the actual situation, wrong report can be reduced, the accuracy of early warning can be improved again, thus effectively improve the operating efficiency of construction machinery and equipment.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (16)
1. for calculating an equipment for total bank moment of the beam of elevator machinery jib, it is characterized in that, this equipment comprises:
Receiving device, for receive described jib at least one pair of to the strain value of curb girder, this strain value at least comprise described at least one pair of to the right side strain value of the left side strain value of the beam in curb girder and a beam relative with this beam; And
Computer device, for according to described strain value, described at least one pair of to the distance between the sectional area of curb girder and offside neutral axis of the beam, calculate total bank moment.
2. equipment according to claim 1, is characterized in that, when described receiving device receive described at least one pair of to curb girder in the one-sided strain value of each beam, described total bank moment method of calculating is as follows:
Wherein, M
wfor total bank moment of the beam of described jib, N is the described logarithm to curb girder, σ
ifor N is to the stress value of i-th beam to curb girder, s
ifor N is to the sectional area of i-th beam to curb girder, L is the distance between the neutral axis of a pair pair of curb girder, and wherein said stress value to be multiplied with a constant by strain value and to obtain.
3. equipment according to claim 1, it is characterized in that, when described receiving device receive described at least one pair of to curb girder in the bilateral strain value of each beam, described according to described strain value, described at least one pair of total bank moment calculated to the distance between the sectional area of curb girder and offside neutral axis of the beam comprise:
According to described strain value, described at least one pair of to the distance between the sectional area of curb girder and offside neutral axis of the beam, calculate relative bank moment;
According to described strain value, described beam relative to the ultimate range of the point on the cross sectional moment of inertia of its neutral axis and the cross section of described beam relative to its neutral axis, described in calculating, at least one pair of is to the bank moment of each beam in curb girder; And
By described relative bank moment with described at least one pair of the bank moment sum of each beam in curb girder is added, obtain total bank moment.
4. equipment according to claim 3, is characterized in that, described total bank moment method of calculating is as follows:
Wherein, M
lRfor the relative bank moment to curb girder of described jib, N is the described logarithm to curb girder, M
ifor N is to the bank moment of i-th beam to curb girder, M
wfor total bank moment of the beam of described jib, σ
si-Land σ
si-Rbe respectively N to the stress value to the stress value on the left of i-th beam of curb girder and right side, s
ifor N is to the sectional area of i-th beam to curb girder, L is the distance between the neutral axis of a pair pair of curb girder, I
ifor N is to i-th beam of curb girder cross sectional moment of inertia relative to its neutral axis, y
imaxfor N is to the ultimate range of the point on the cross section of i-th beam to curb girder relative to its neutral axis, wherein said stress value to be multiplied with a constant by strain value and to obtain;
Wherein, when the beam of described jib is circular tube shaped,
wherein D
iand d
ibe respectively external diameter and the internal diameter in the cross section of beam.
5. elevator machinery jib rolls a watch-dog, and it is characterized in that, this equipment comprises:
The equipment of total bank moment of the beam for calculating elevator machinery jib any one of claim 1-4 described in claim, wherein said receiving device is also for receiving the current degreeof turn of described jib; And control setup, for:
Determine the critical bank moment corresponding with described current degreeof turn; And
Described total bank moment and described critical bank moment are contrasted, and when described total bank moment is greater than the first predetermined bank moment, perform at least one in following operation:
Control warning device to report to the police; And
Control elevator machinery quits work;
Wherein, described first predetermined bank moment is that described critical bank moment is multiplied by the first predetermined percentage.
6. elevator machinery jib according to claim 5 rolls watch-dog, it is characterized in that, when described total bank moment is greater than described first predetermined bank moment and is less than or equal to the second predetermined bank moment, described control setup controls warning device and reports to the police, when described total bank moment is greater than described second predetermined bank moment, described control setup controls elevator machinery and quits work, wherein, described second predetermined bank moment is that described critical bank moment is multiplied by the second predetermined percentage, described second predetermined percentage is greater than described first predetermined percentage.
7. elevator machinery jib according to claim 5 rolls watch-dog, it is characterized in that, the out-of-work work of described control elevator machinery comprises the operation of the roll loads of the beam that can change described jib, and this operation comprises described jib revolution operation and the operation of hoisting mechanism cargo lifting.
8. elevator machinery jib rolls a monitored control system, and it is characterized in that, this system comprises:
Elevator machinery jib any one of claim 5 to 7 described in claim rolls watch-dog;
Multiple strain sensor, for measuring described strain value; And
Angular transducer, for detecting the degreeof turn of described jib.
9. a construction machinery and equipment, is characterized in that, this project machinery comprises system according to claim 8.
10., for calculating a method for total bank moment of the beam of elevator machinery jib, it is characterized in that, the method comprises:
At least one pair of receiving described jib to the strain value of curb girder, this strain value at least comprise described at least one pair of to the right side strain value of the left side strain value of the beam in curb girder and a beam relative with this beam; And
According to described strain value, described at least one pair of to the distance between the sectional area of curb girder and offside neutral axis of the beam, calculate total bank moment.
11. methods according to claim 10, is characterized in that, when receive described at least one pair of to curb girder in the one-sided strain value of each beam, described total bank moment method of calculating is as follows:
Wherein, M
wfor total bank moment of the beam of described jib, N is the described logarithm to curb girder, σ
ifor N is to the stress value of i-th beam to curb girder, s
ifor N is to the sectional area of i-th beam to curb girder, L is the distance between the neutral axis of a pair pair of curb girder, and wherein said stress value to be multiplied with a constant by strain value and to obtain.
12. methods according to claim 10, it is characterized in that, when receive described at least one pair of to curb girder in the bilateral strain value of each beam, described according to described strain value, described at least one pair of total bank moment calculated to the distance between the sectional area of curb girder and offside neutral axis of the beam comprise:
According to described strain value, described at least one pair of to the distance between the sectional area of curb girder and offside neutral axis of the beam, calculate relative bank moment;
According to described strain value, described beam relative to the ultimate range of the point on the cross sectional moment of inertia of its neutral axis and the cross section of described beam relative to its neutral axis, described in calculating, at least one pair of is to the bank moment of each beam in curb girder; And
By described relative bank moment with described at least one pair of the bank moment sum of each beam in curb girder is added, obtain total bank moment.
13. methods according to claim 12, is characterized in that, described total bank moment method of calculating is as follows:
Wherein, M
lRfor the relative bank moment to curb girder of described jib, N is the described logarithm to curb girder, M
ifor the bank moment of i-th beam of described jib, M
wfor total bank moment of the beam of described jib, σ
si-Land σ
si-Rbe respectively N to the stress value to the stress value on the left of i-th beam of curb girder and right side, s
ifor N is to the sectional area of i-th beam to curb girder, L is the distance between the neutral axis of a pair pair of curb girder, I
ifor N is to i-th beam of curb girder cross sectional moment of inertia relative to its neutral axis, y
imaxfor N is to the ultimate range of the point on the cross section of i-th beam to curb girder relative to its neutral axis, wherein said stress value to be multiplied with a constant by strain value and to obtain;
Wherein, when the beam of described jib is circular tube shaped,
wherein D
iand d
ibe respectively external diameter and the internal diameter in the cross section of beam.
14. 1 kinds of elevator machinery jibs roll method for supervising, and it is characterized in that, the method comprises:
Method any one of claim 10-13 described in claim calculates total bank moment of the beam of elevator machinery jib;
Receive the current degreeof turn of described jib;
Determine the critical bank moment corresponding with described current degreeof turn; And
Described total bank moment and described critical bank moment are contrasted, and when described total bank moment is greater than the first predetermined bank moment, perform at least one in following operation:
Control warning device to report to the police; And
Control elevator machinery quits work;
Wherein, described first predetermined bank moment is that described critical bank moment is multiplied by the first predetermined percentage.
15. methods according to claim 14, it is characterized in that, when described total bank moment is greater than described first predetermined bank moment and is less than or equal to the second predetermined bank moment, described control setup controls warning device and reports to the police, when described total bank moment is greater than described second predetermined bank moment, described control setup controls elevator machinery and quits work, wherein, described second predetermined bank moment is that described critical bank moment is multiplied by the second predetermined percentage, and described second predetermined percentage is greater than described first predetermined percentage.
16. methods according to claim 14, it is characterized in that, the out-of-work work of described control elevator machinery comprises the operation of the roll loads of the beam that can change described jib, and this operation comprises described jib revolution operation and the operation of hoisting mechanism cargo lifting.
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| CN104016236B (en) * | 2014-06-05 | 2016-04-06 | 三一汽车起重机械有限公司 | Moment limiting system, hoisting crane and moment method for limiting |
| CN109911772B (en) * | 2019-04-30 | 2024-01-30 | 安徽柳工起重机有限公司 | Suspension arm rotation control system for crane loading and unloading vehicle and control method thereof |
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