CN1657396A - Device and method for limiting wheel-pressure of bogie of bridge crane - Google Patents
Device and method for limiting wheel-pressure of bogie of bridge crane Download PDFInfo
- Publication number
- CN1657396A CN1657396A CN 200510020521 CN200510020521A CN1657396A CN 1657396 A CN1657396 A CN 1657396A CN 200510020521 CN200510020521 CN 200510020521 CN 200510020521 A CN200510020521 A CN 200510020521A CN 1657396 A CN1657396 A CN 1657396A
- Authority
- CN
- China
- Prior art keywords
- dolly
- bogie
- pressure
- limiting wheel
- bridge crane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Control And Safety Of Cranes (AREA)
Abstract
A mechanism for limiting the wheel pressure of bogie of bridge type hoister is composed of the loadsensor installed to lifting unit of bogie, the position sensor installed to the running unit of bogie, and the programmable controller connected to said sensors, control motor and brake.
Description
Technical field
The present invention relates to a kind of control method of hoisting crane parameter, especially relate to a kind of device and method of limiting wheel-pressure of bogie of bridge crane.
Background technology
Use crane in bridge type in large quantities in the industrial premises building, the cart wheel load of crane in bridge type can produce a very large impact the design and the cost of factory building.In the existing rubber tyre gantry crane design, the traditional approach that calculates wheel-pressure of bogie of bridge crane be according to the dolly handling maximum load of crane in bridge type and when being in end position the position of close big Car Track () calculate, this method of calculating is very conservative, in fact most crane in bridge type dolly when the handling rated load generally can not run to end position, the big wheel that calculates when being in end position according to dolly is pressed to be actually and is higher than real wheel load far away, and the factory building of building according to this wheel load can be because rich intensity too much cause waste.
With certain power station is example, according to estimation, and the every increase by 10% of crane wheel load, the cost on the crane girder of factory building, pillar and basis will increase 5-7%.If examine the few 100KN of wheel pressure ratio design wheel load of reality, then the cost of factory building can be saved about 1,000,000 yuan.
This example explanation, actual wheel load does not have so big that custom calculates, and that is to say according to the design of existing rubber tyre gantry crane design custom, will over-evaluate the wheel load of cart greatly, thereby increase the cost of factory building, causes unnecessary waste.
Summary of the invention
The present invention adopts a kind of method of the position of hoisting capacity and dolly being carried out chain control, by computing machine (Programmable Logic Controller) run location of dolly is controlled, make it can not surpass the position that when this load, allows arrival, thus limiting wheel-pressure of bogie of bridge crane.Technical solution of the present invention is: a kind of device of limiting wheel-pressure of bogie of bridge crane, this device comprises load transducer, position transduser and Programmable Logic Controller, load transducer is installed on the lifting mechanism of dolly, position transduser is installed on the wheeling mechanism, load transducer and position transduser all connect with Programmable Logic Controller, and Programmable Logic Controller also is connected with drg with the control motor of hoisting crane.
Described load transducer is two or more sensors.Described position transduser is two or more sensors.
A kind of method of limiting wheel-pressure of bogie of bridge crane, this method comprises the following steps:
1) beginning, hoisting crane enters mode of operation;
2) computing machine reads in the M/C direction and allows the direction of operating sign;
3) judge whether the method that dolly moves is allowed to, if the judgment is Yes, connect hand switch, allow dolly normally to move;
4) read in the value of load transducer;
5) calculate the center of gravity of dolly and allow dolly depart from the girder line of centers apart from Sd;
6) read in the value of dolly position transduser, calculate the current distance S of dolly;
7) calculate (Sd-S), whether judge dolly,, then return step 4) if the result of judgement is as yet not near end position near end position;
8) result that judges of step 7) be dolly near limit, then send control signal with manual switchover for automatic, and send alarm signal, call the automatic deceleration program;
9) judge whether dolly reaches the limit of the position, and judged result is the position that do not reach capacity, and then returns step 8);
10) judged result is the position that reaches capacity, and then sends brake command;
11) end of braking is provided with the permission Directional Sign, returns step 2)
Above-mentioned steps is in service, certain time interval can be set or by this step of keyboard interrupt, return this interruption position then and continues this step.
Advantage of the present invention is: reasonably reduced the maximum wheel load of hoisting crane, saved the factory building cost widely.
Description of drawings
Fig. 1 is wheel load and dolly location diagram;
Fig. 2 is a structure drawing of device of the present invention;
Fig. 3 is a flow chart of the present invention.
The specific embodiment
Calculate wheel-pressure of bogie of bridge crane and need consider following factor:
If 1 handling maximum load then should calculate according to the residing actual needs of dolly position.Generally speaking, when the crane for hoisting maximum load, dolly often is near the middle part of girder, and is much smaller when at this moment the wheel load of cart obviously is in the end of girder than dolly.
If 2 trolley travellings to the end of girder, then should calculate according to the actual load amount of this moment.Generally speaking, when trolley travelling arrives the end of girder, all there is not the handling maximum load usually, much smaller when at this moment the wheel load of cart is obviously than the handling maximum load.
If neither the maximum load and operating between the end and middle part of girder of 3 dolly handlings then should be determined actual maximum wheel load Q by curve shown in Figure 1:
Q＝Q1+Q2+Q3
In the formula, Q1 is the wheel load that the crane span structure deadweight causes, and Q1 was a constant after the hoisting crane manufacturing was finished;
Q2 is the wheel load that the dolly deadweight causes, when being trolley travelling, and apart from the function of span centre distance X,
Q2＝F(X)
Q3 is the wheel load that load-carrying causes, when being trolley travelling, and apart from the function of span centre distance X and hoisting capacity W,
Q3＝Φ(X，W)
Bridge crane with 125t * 127m is an example, if limit the distance of trolley travelling under its various situations, then its wheel load Q2+Q3 roughly as shown in Figure 1, shown in the figure corresponding to various load the time trolley travelling end position (during as 125t apart from girder center 5m, during 100t apart from girder center 10m etc.) determine according to actual needs, with situation in scheming is example, maximum wheel load is neither occur in lift heavy 125t, neither 40t and dolly when being positioned at the girder end, but occur in load 100t and dolly is positioned at 10m restriction site place, (the dotted line end of figure) was much smaller when obvious weight/HP ratio 125t of wheel load at this moment and dolly were arranged in the girder end.In case maximum wheel load is determined, the dolly of hoisting crane just must be worked under restriction shown in Figure 1, for example, when the handling maximum load, the distance that dolly departs from the girder middle part will be limited, situation during other load of handling also similarly, but deviation distance can be longer, only just allows to reach the limit of the position when the lighter load of handling.In order to ensure this point, the present invention has adopted a kind of device and method that the position of dolly hoisting capacity and dolly is carried out the limiting wheel-pressure of bogie of bridge crane of chain control.
A kind of device of limiting wheel-pressure of bogie of bridge crane comprises load transducer 1, position transduser 2 and Programmable Logic Controller 3, and load transducer 1 is installed on the lifting mechanism of dolly, is used for the current hoisting capacity Q of measurements and calculations; Position transduser 2 is installed on the wheeling mechanism, is used to measure the position X of dolly on girder.Load transducer 1 and position transduser 2 all connect with Programmable Logic Controller 3, and Programmable Logic Controller 3 also is connected with drg with the control motor of hoisting crane.In order to ensure reliability, should take redundant measure, promptly adopt the same physical quantity of two or more sensor measurements, therefore, load transducer 1 and position transduser 2 are two or more sensors, and computing machine will adopt a wherein too conservative observed reading to calculate.
Utilize the method for said apparatus limiting wheel-pressure of bogie of bridge crane, comprise the following steps:
1) beginning, hoisting crane enters mode of operation;
2) computing machine reads in the M/C direction and allows the direction of operating sign;
3) judge whether the method that dolly moves is allowed to, if the judgment is Yes, connect hand switch, allow dolly normally to move;
4) read in the value of load transducer;
5) calculate the center of gravity of dolly and allow dolly depart from the girder line of centers apart from Sd;
6) read in the value of dolly position transduser, calculate the current distance S of dolly;
7) calculate (Sd-S), whether judge dolly,, then return step 4) if the result of judgement is as yet not near end position near end position;
8) result that judges of step 7) be dolly near limit, then send control signal with manual switchover for automatic, and send alarm signal, call the automatic deceleration program;
9) judge whether dolly reaches the limit of the position, and judged result is the position that do not reach capacity, and then returns step 8);
10) judged result is the position that reaches capacity, and then sends brake command;
11) end of braking is provided with the permission Directional Sign, returns step 2)
Above-mentioned steps is in service, certain time interval can be set interrupt this step (clock interruption), returns this interruption position then and continues this step.Clock interrupts can being set to about 10-20 millisecond once, is used to move display driving software and speaker drive program, and the data display in the display buffer on CRT, LED or digital character display tube, and is shown the sign of being correlated with or sends alarm signal.Above-mentioned steps is in service, also can return this interruption position then and continue this step by this step of keyboard interrupt.Keyboard interrupt makes the user can revise and adjust some system parameter.
Claims (6)
1, a kind of device of limiting wheel-pressure of bogie of bridge crane, it is characterized in that: this device comprises load transducer (1), position transduser (2) and Programmable Logic Controller (3), load transducer (1) is installed on the lifting mechanism of dolly, position transduser (2) is installed on the wheeling mechanism, load transducer (1) and position transduser (2) all connect with Programmable Logic Controller (3), and Programmable Logic Controller (3) also is connected with drg with the control motor of hoisting crane.
2, the device of limiting wheel-pressure of bogie of bridge crane according to claim 1 is characterized in that: described load transducer (1) is two or more sensors.
3, the device of limiting wheel-pressure of bogie of bridge crane according to claim 1 is characterized in that: described position transduser (2) is two or more sensors.
4, a kind of method of limiting wheel-pressure of bogie of bridge crane, this method comprises the following steps:
1) beginning, hoisting crane enters mode of operation;
2) computing machine reads in the M/C direction and allows the direction of operating sign;
3) judge whether the method that dolly moves is allowed to, if the judgment is Yes, connect hand switch, allow dolly normally to move;
4) read in the value of load transducer;
5) calculate the center of gravity of dolly and allow dolly depart from the girder line of centers apart from Sd;
6) read in the value of dolly position transduser, calculate the current distance S of dolly;
7) calculate (Sd-S), whether judge dolly,, then return step 4) if the result of judgement is as yet not near end position near end position;
8) result that judges of step 7) be dolly near limit, then send control signal with manual switchover for automatic, and send alarm signal, call the automatic deceleration program;
9) judge whether dolly reaches the limit of the position, and judged result is the position that do not reach capacity, and then returns step 8);
10) judged result is the position that reaches capacity, and then sends brake command;
11) end of braking is provided with the permission Directional Sign, returns step 2)
5, the method for limiting wheel-pressure of bogie of bridge crane according to claim 4 is characterized in that: certain time interval is set interrupts this step, return this interruption position then and continue this step.
6, the method for limiting wheel-pressure of bogie of bridge crane according to claim 4 is characterized in that: can return this interruption position then and continue this step by this step of keyboard interrupt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510020521 CN1657396A (en) | 2005-03-14 | 2005-03-14 | Device and method for limiting wheel-pressure of bogie of bridge crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510020521 CN1657396A (en) | 2005-03-14 | 2005-03-14 | Device and method for limiting wheel-pressure of bogie of bridge crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1657396A true CN1657396A (en) | 2005-08-24 |
Family
ID=35007133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510020521 Pending CN1657396A (en) | 2005-03-14 | 2005-03-14 | Device and method for limiting wheel-pressure of bogie of bridge crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1657396A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261988A (en) * | 2011-04-25 | 2011-11-30 | 吴峰崎 | Method for testing residual life of crane |
-
2005
- 2005-03-14 CN CN 200510020521 patent/CN1657396A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261988A (en) * | 2011-04-25 | 2011-11-30 | 吴峰崎 | Method for testing residual life of crane |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100995188B1 (en) | Emergency stop system for elevator | |
| JP4335511B2 (en) | Elevator equipment | |
| US8763763B2 (en) | Elevator apparatus having car position detection | |
| KR20120023105A (en) | Elevator device | |
| WO2007057973A1 (en) | Brake system for elevator | |
| WO2006017539A3 (en) | Variabole-speed load-dependent drive and hoist system | |
| CN101700854A (en) | System and method for monitoring optimum hoisting height of shore bridge container | |
| CN101244791B (en) | Safety operating control method for container hoisting and hanging system | |
| KR20180071733A (en) | System and Method for Ramp Traveling Speed Control in Forklift | |
| CN103204417A (en) | Wear detection device for elevator driving rope sheave and detection method | |
| CN102951508B (en) | Device and method for confirming position of lift car | |
| CN1657396A (en) | Device and method for limiting wheel-pressure of bogie of bridge crane | |
| CN2587991Y (en) | Drawing-lifting apparatus for vertical lifting/lowering type parking equipment | |
| CN201619961U (en) | Shore bridge container hoisting height monitoring system | |
| JP4575076B2 (en) | Elevator equipment | |
| CN111056397B (en) | Static braking performance evaluation system and method for elevator brake | |
| JP2008007322A (en) | Last floor deceleration control system of elevator | |
| WO2020003567A1 (en) | Crane device | |
| CN103145046A (en) | Automatic safety control apparatus of bridge crane under complex condition, and method thereof | |
| CN113830570A (en) | Door type bucket wheel machine walking beam protection system | |
| CN203173702U (en) | Double-beam bridge crane | |
| CN211871077U (en) | Static braking performance evaluation system of elevator brake | |
| JP5026361B2 (en) | Elevator equipment | |
| CN2920954Y (en) | Steel rope induction lifting height limiter | |
| CN106865430A (en) | A kind of tower crane car limit device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |