CN103569867A - 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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- CN103569867A CN103569867A CN201310572525.8A CN201310572525A CN103569867A CN 103569867 A CN103569867 A CN 103569867A CN 201310572525 A CN201310572525 A CN 201310572525A CN 103569867 A CN103569867 A CN 103569867A
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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, while being subject to wind moment, jib will be subject to the effect of bank moment, for long-armed hoisting machinery or the hoister in large tonnage tool erected, the impact of bank moment is more obvious, when serious, may cause the safety misadventures such as rollover.Therefore, to the direct actv. of elevator machinery jib bank moment, detect extremely important.
In prior art, the detection that the jib of elevator machinery rolls secure context mainly realizes by the following method: 1, at jib offside, be arranged symmetrically with tensioner, wherein, this tensioner comprises tension rail and tension ropes, and the pulling force sensor of connecting, thereby obtain jib bank moment value in tension ropes; 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, and the observed reading by these sensors calculates jib bank moment value; 3, oil pressure pressure sensor is set on crane rotation motor, by passing in and out oily difference of pressure calculating, draws jib bank moment value.
The equipment of the jib bank moment that the calculating that above technical scheme provides consists of truss arm, complex structure, and influential to the strength and stability of jib, and need to re-start and check or improve the unit design of jib.In addition, levelness sensor, jib Position and attitude sensor and lift heavy load transducer or motor oil pressure sensor by jib base calculate bank moment, measure accumulated error large, add calculation error, are difficult to guarantee the accuracy of result of a measurement.In addition, generally, elevator machinery jib comprise two pairs and two pairs above to curb girder, and every pair of size and Orientation to the bank moment of each beam in curb girder may be different, so be necessary to calculate as required a pair of of elevator machinery jib or above 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 of elevator machinery jib inclination.
To achieve these goals, the invention provides a kind of for calculating the equipment of total bank moment of the beam of elevator machinery jib, this equipment comprises: receiving device, for at least one pair of strain value to curb girder that receives described jib, this strain value at least comprises described 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; 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, the present invention also provides a kind of elevator machinery jib to roll watch-dog, and this equipment comprises: above-mentioned for calculating the equipment of total bank moment of the beam of elevator machinery jib, 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 in the situation that described total bank moment is greater than the first predetermined bank moment, at least one below carrying out in operation: control warning device and report to the police; And control elevator machinery quits work; Wherein, described the first predetermined bank moment is that described critical bank moment is multiplied by the first predetermined percentage.。
Correspondingly, the present invention also provides a kind of elevator machinery jib to roll monitored control system, and this system comprises: above-mentioned elevator machinery jib rolls watch-dog; A plurality of strain sensores, for measuring described strain value; And angular transducer, for detection of the degreeof turn of described jib.
Correspondingly, the present invention also provides a kind of construction machinery and equipment, and this project machinery comprises that above-mentioned elevator machinery jib rolls monitored control system.
Correspondingly, it is a kind of for calculating the method for total bank moment of the beam of elevator machinery jib that the present invention also provides, the method comprises: the strain value of at least one pair of that receives described jib to curb girder, and this strain value at least comprises described 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; 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, the present invention also provides a kind of elevator machinery jib to roll method for supervising, and the method comprises: the total bank moment that calculates 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 in the situation that described total bank moment is greater than the first predetermined bank moment, at least one below carrying out in operation: control warning device and report to the police; And control elevator machinery quits work; Wherein, described the 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 strain sensor being set on the beam at elevator machinery jib and controlling the operation of elevator machinery according to total bank moment of the beam of the jib calculating by the measured strain value of this strain sensor, method of calculating is simple, monitor mode is directly effective, not only realized elevator machinery jib has been rolled to safe accuracy detection, and improved the survey precision of jib bank moment.
Other features and advantages of the present invention partly in detail are described the specific embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be 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 the specific embodiment one below.In the accompanying drawings:
Fig. 1 is provided by the invention for calculating the structural representation of equipment of total bank moment of the beam of elevator machinery jib;
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 that strain sensor is set on the beam of jib;
Fig. 5 is provided by the invention in the situation that receive the method flow diagram of total bank moment that the one-sided strain value of beam calculates the beam of elevator machinery jib;
Fig. 6 is provided by the invention in the situation that receive the method flow diagram of total bank moment that the bilateral strain value of beam calculates the beam of elevator machinery jib;
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.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, the specific embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
Fig. 1 is provided by the invention for calculating the structural representation of equipment of total bank moment of the beam of elevator machinery jib, as shown in Figure 1, should comprise receiving device 100 and computer device 200 for calculating the equipment of total bank moment of the beam of elevator machinery jib, receiving device 100 at least one pair of strain value to curb girder for receiving jib, computer device 200 according to this strain value, the distance between the sectional area of curb girder and offside neutral axis of the beam is calculated to total bank moment of the beam of jib.
For example, when receiving device 100 is when receiving a pair of strain value to curb girder of jib, this strain value comprises this right side strain value to the left side strain value of the beam in curb girder and a beam relative with this beam, computer device 200 according to this strain value, this is to calculating total bank moment of the beam of jib to the distance between the sectional area of curb girder and offside neutral axis of the beam.
When receiving device 100 is for receiving the strain value of two couple of jib to curb girder, this strain value 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 of this two centering, and 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 that receives jib can be for example a pair of strain value to curb girder that receives jib to the strain value of curb girder, the strain value of two pairs or more that also can receive jib to curb girder.Specifically, in the situation that receive a pair of strain value to curb girder of jib, it is total bank moment of two beams to curb girder that total bank moment refers to a pair of of jib, in the situation that the strain value of two pairs or more of reception jib to curb girder, total bank moment refers to two pairs or more to curb girder.
For convenience of explanation, hereinafter, the present invention will be take and a pair of curb girder and two pairs be described as example curb girder.
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 watch-dog and not only comprises for calculating receiving device 100 and the computer device 200 of equipment of total bank moment of the beam of 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 in the situation that total bank moment is greater than the first predetermined bank moment, at least one below carrying out in 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 can bear at this degreeof turn in the situation of jib in a certain degreeof turn.Critical bank moment can obtain by theory calculating, finite element simulation or experiment.Bank moment is the caused moment of 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 by computer device 200, calculate total bank moment, by control setup 300, according to current degreeof turn, from data bank, find the critical bank moment corresponding with this current degreeof turn again, then, total bank moment that control setup 300 calculates computer device 200 contrasts with the critical bank moment finding from data bank, in the situation that total bank moment is greater than the first predetermined bank moment, control setup 300 can be controlled warning device and report to the police or control elevator machinery and quit work, or when control warning device is reported to the police, controlling elevator machinery quits work.
Further, in the situation that 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, control setup 300 can only be controlled warning device and reports to the police, if total bank moment is greater than the second predetermined bank moment, control setup 300 can only be controlled elevator machinery and quits work.Certainly, the present invention is not limited to this, and for example, in the situation that total bank moment is greater than the second predetermined bank moment, control setup 300 also can be controlled warning device and report to the police and 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%, 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 be for changing the operation of inclination load of the beam of jib, such as, jib revolution 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 that elevator machinery jib rolls receiving device 100, computer device 200 and the control setup 300 of watch-dog, also comprise a plurality of strain sensores 400 and angular transducer 500, a plurality of strain sensores 400 are for measuring the strain value of the beam of jib, and angular transducer 500 is for measuring the degreeof turn of jib.
Wherein, can two strain sensores 400 be set respectively on to curb girder at least one pair of of jib, that is to say also and can on four beams of jib, two strain sensores 400 be set respectively, certainly, also can arrange respectively on a strain sensor 400 or four beams at jib on to curb girder a strain sensor 400 is set respectively at jib a pair of.Under preferable case, strain sensor 400 can be arranged on to the bottom of the beam of jib, to reach good detection effect.
Below, in conjunction with Fig. 4 to being described in detail for calculating the principle of equipment of total bank moment of the beam of elevator machinery jib:
To only in a pair of situation that strain sensor 400 is set on to curb girder, this is to referring to the beam 401 shown in Fig. 4 and 403 or beam 402 and 404 to curb girder, Fig. 4 schematically shows the schematic diagram that strain sensor 400 is set on the beam of jib, and, Fig. 4 also schematically shows the strain sensor in the left side of each beam and right side setting, for example, at strain sensor 401-L, be in the situation that the strain sensor that the left side of beam 401 arranges, strain sensor 401-R be the strain sensor in the setting of the right side of beam 401.
For only at least one pair of of jib to curb girder in the situation of strain sensor of one-sided setting of each beam, 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 to i beam of curb girder, s
ifor N is to the sectional area to i beam of curb girder, L is a pair of to the distance between the neutral axis of curb girder, and N is positive integer.Wherein, this stress value calculates according to the corresponding measured strain value of strain sensor, as strain value and a constant can obtain corresponding stress value after multiplying each other.
Here at least one pair of of indication can be for a pair of to curb girder to curb girder, i.e. two beams, also can be for two pairs to curb girder, i.e. four beams, for in a pair of one-sided situation that a strain sensor is set respectively to curb girder, comprising: in the left side of beam 401 and the right side of beam 403, strain sensor 401-L and 403-R are set respectively; On the right side of beam 401 and the left side of beam 403, strain sensor 401-R and 403-L are set respectively; In the left side of beam 402 and the right side of beam 404, strain sensor 402-L and 404-R are set respectively; On the right side of beam 402 and the left side of beam 404, strain sensor 402-R and 404-L are set respectively.The one-sided situation that a strain sensor is set 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 be set.
For at least one pair of of jib to curb girder in the bilateral of each beam the situation of strain sensor is set, 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 the ultimate range with respect to its neutral axis with respect to the point on the interface moment of inertia of its neutral axis and the interface of beam, calculate at least one pair of bank moment to each beam in curb girder, again relative bank moment and at least one pair of bank moment sum to each beam in curb girder are added, obtain total bank moment.
For this at least one pair of at jib 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 to i beam of curb girder, M
wfor total bank moment of the beam of jib, σ
si-Land σ
si-Rbe respectively N to the stress value on the left of i beam of curb girder and the stress value on right side, s
ifor N is to the sectional area to i beam of curb girder, L is a pair of to the distance between the neutral axis of curb girder, I
ifor N is to the cross sectional moment of inertia with respect to its neutral axis to i beam of curb girder,
yimaxfor N to the point on the cross section of i beam of curb girder the ultimate range with respect to its neutral axis, N is positive integer, wherein said stress value calculates according to strain value.Wherein, when the beam of jib is circular tube shaped,
d wherein
iand d
ibe respectively external diameter and the internal diameter in the cross section of beam.Wherein, stress value calculates according to the corresponding measured strain value of strain sensor, as strain value and a constant can obtain corresponding stress value after multiplying each other.
In this and above-mentioned at least one pair of to curb girder in each beam one-sided that strain sensor is set is similar, at least one pair of can be for a pair of to curb girder to curb girder, also can be for two pairs to curb girder, i.e. four beams.For in a pair of situation that the bilateral of curb girder is arranged respectively to a strain sensor, comprising: the bilateral in beam 401 and 403 arranges respectively strain sensor 401-L, 401-R, 403-L and 403-R; Bilateral in beam 402 and 404 arranges respectively strain sensor 402-L, 402-R, 404-L and 404-R.The situation of one strain sensor is set respectively, 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 for the bilateral at four beams.
Correspondingly, the present invention also provides a kind of construction machinery and equipment, and this project machinery comprises that above-mentioned elevator machinery jib rolls monitored control system.
Fig. 5 is provided by the invention in the situation that receive the method flow diagram of total bank moment that the one-sided strain value of beam calculates the beam of elevator machinery jib, as shown in Figure 5, first the one-sided strain value of at least one pair of that receives jib to 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 provided by the invention in the situation that receive the method flow diagram of total bank moment that the bilateral strain value of beam calculates the beam of elevator machinery jib, as shown in Figure 6, first the bilateral strain value of at least one pair of that receives jib to each beam in curb girder, then according to this strain value, this at least one pair of the distance between the sectional area of curb girder and offside neutral axis of the beam is calculated to relative bank moment, then according to this strain value, beam is the ultimate range with respect to its neutral axis with respect to the point on the cross sectional moment of inertia of its neutral axis and the cross section of beam, calculate at least one pair of bank moment to each beam in curb girder, again relative bank moment and this at least one pair of bank moment sum to each beam in curb girder are added, obtain total bank moment.
The detail of the method for total bank moment of the beam of Fig. 5 and calculating elevator machinery jib described in Fig. 6 is with identical for calculating the equipment of total bank moment of beam of 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 roll method for supervising comprise in Fig. 5 or Fig. 6 for calculating the step of total bank moment of the beam of elevator machinery jib, adopt and for calculating the method for total bank moment of the beam of elevator machinery jib, calculate total bank moment shown in Fig. 5 or Fig. 6, 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 calculating 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, controlling warning device reports to the police and/or 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.
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, method and Fig. 7 that Fig. 8 provides are similar, different is, in the situation that total bank moment is greater than the first predetermined bank moment, control warning device and report to the police, then judge whether total bank moment is greater than the second predetermined bank moment, in the situation that 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 with elevator machinery jib inclination watch-dog provided by the invention that the elevator machinery jib providing with Fig. 8 about Fig. 7 of the present invention rolls the detail of method for supervising, in this, repeats no more.
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 the truss arm for elevator machinery.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; 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, for example, the arrangement of strain sensor can be only arranged in the bilateral symmetry of two beams of offside; also can only in the outside of four beams, arrange, 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, can also improve the accuracy to the detection of in use dangerous operation of elevator machinery, can also provide for other operations of elevator machinery failure-free data more simultaneously.In addition, metering system provided by the invention is simple, direct, effective, employing is carried out security monitoring according to the corresponding critical bank moment of the different degreeof turns of jib to hoisting crane, more tally with the actual situation, can reduce wrong report, can improve the accuracy of early warning again, thereby effectively improve the operating efficiency of construction machinery and equipment.
It should be noted that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out combination in any, 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 the equipment of total bank moment for the beam of elevator machinery jib, it is characterized in that, this equipment comprises:
Receiving device, at least one pair of strain value to curb girder that receives described jib, this strain value at least comprises described 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; 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, in the situation that at least one pair of one-sided strain value to each beam in curb girder described in the reception of described receiving device, 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 to i beam of curb girder, s
ifor N is to the sectional area to i beam of curb girder, L is a pair of to the distance between the neutral axis of curb girder, and wherein said stress value calculates according to strain value.
3. equipment according to claim 1, it is characterized in that, in the situation that described receiving device receives described at least one pair of bilateral strain value to each beam in curb girder, described according to described strain value, described at least one pair of the distance between the sectional area of curb girder and offside neutral axis of the beam calculated to total bank moment 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 with respect to the point on the cross sectional moment of inertia of its neutral axis and the cross section of described beam the ultimate range with respect to its neutral axis, calculate described at least one pair of bank moment to each beam in curb girder; And
Described relative bank moment and described at least one pair of bank moment sum to each beam in curb girder are 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 to i beam of 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 on the left of i beam of curb girder and the stress value on right side, s
ifor N is to the sectional area to i beam of curb girder, L is a pair of to the distance between the neutral axis of curb girder, I
ifor N is to the cross sectional moment of inertia with respect to its neutral axis to i beam of curb girder,
yimaxfor N to the point on the cross section of i beam of curb girder the ultimate range with respect to its neutral axis, wherein said stress value calculates according to strain value;
Wherein, when the beam of described jib is circular tube shaped,
d wherein
iand d
ibe respectively external diameter and the internal diameter in the cross section of beam.
5. elevator machinery jib rolls a watch-dog, it is characterized in that, this equipment comprises:
According to described in any one claim in claim 1-4 for calculating the equipment of total bank moment of the beam of elevator machinery jib, 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 in the situation that described total bank moment is greater than the first predetermined bank moment, at least one below carrying out in operation:
Controlling warning device reports to the police; And
Control elevator machinery quits work;
Wherein, described the 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, in the situation that described total bank moment is greater than described the first predetermined bank moment and is less than or equal to the second predetermined bank moment, described control setup is controlled warning device and is reported to the police, in the situation that described total bank moment is greater than described the second predetermined bank moment, described control setup is controlled elevator machinery and is quit work, wherein, described the second predetermined bank moment is that described critical bank moment is multiplied by the second predetermined percentage, described the second predetermined percentage is greater than described the first predetermined percentage.
7. elevator machinery jib according to claim 5 rolls watch-dog, it is characterized in that, described work comprises the operation of the inclination load 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, it is characterized in that, this system comprises:
According to the elevator machinery jib described in any one claim in claim 5 to 7, roll watch-dog;
A plurality of strain sensores, for measuring described strain value; And
Angular transducer, for detection of the degreeof turn of described jib.
9. a construction machinery and equipment, is characterized in that, this project machinery comprises system claimed in claim 8.
10. for calculating the method for total bank moment for the beam of elevator machinery jib, it is characterized in that, the method comprises:
The strain value of at least one pair of that receives described jib to curb girder, this strain value at least comprises described 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; 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, in the situation that at least one pair of one-sided strain value to each beam in curb girder described in receiving, 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 to i beam of curb girder, s
ifor N is to the sectional area to i beam of curb girder, L is a pair of to the distance between the neutral axis of curb girder, and wherein said stress value calculates according to strain value.
12. methods according to claim 10, it is characterized in that, in the situation that receive described at least one pair of bilateral strain value to each beam in curb girder, described according to described strain value, described at least one pair of the distance between the sectional area of curb girder and offside neutral axis of the beam calculated to total bank moment 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 with respect to the point on the cross sectional moment of inertia of its neutral axis and the cross section of described beam the ultimate range with respect to its neutral axis, calculate described at least one pair of bank moment to each beam in curb girder; And
Described relative bank moment and described at least one pair of bank moment sum to each beam in curb girder are 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 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 on the left of i beam of curb girder and the stress value on right side, s
ifor N is to the sectional area to i beam of curb girder, L is a pair of to the distance between the neutral axis of curb girder, I
ifor N is to the cross sectional moment of inertia with respect to its neutral axis to i beam of curb girder,
yimaxfor N to the point on the cross section of i beam of curb girder the ultimate range with respect to its neutral axis, wherein said stress value calculates according to strain value;
Wherein, when the beam of described jib is circular tube shaped,
d wherein
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, it is characterized in that, the method comprises:
According to the method described in any one claim in claim 10-13, calculate 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 in the situation that described total bank moment is greater than the first predetermined bank moment, at least one below carrying out in operation:
Controlling warning device reports to the police; And
Control elevator machinery quits work;
Wherein, described the 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, in the situation that described total bank moment is greater than described the first predetermined bank moment and is less than or equal to the second predetermined bank moment, described control setup is controlled warning device and is reported to the police, in the situation that described total bank moment is greater than described the second predetermined bank moment, described control setup is controlled elevator machinery and is quit work, wherein, described the second predetermined bank moment is that described critical bank moment is multiplied by the second predetermined percentage, and described the second predetermined percentage is greater than described the first predetermined percentage.
16. methods according to claim 14, is characterized in that, described work comprises the operation of the inclination load 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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| CN103569867B (en) | 2015-08-12 |
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