CN2073869U - Omnibearing protector of loading moment for use in engineering hoister - Google Patents
Omnibearing protector of loading moment for use in engineering hoister Download PDFInfo
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- CN2073869U CN2073869U CN 90208610 CN90208610U CN2073869U CN 2073869 U CN2073869 U CN 2073869U CN 90208610 CN90208610 CN 90208610 CN 90208610 U CN90208610 U CN 90208610U CN 2073869 U CN2073869 U CN 2073869U
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- moment
- crane
- detector
- utility
- omnibearing
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Abstract
The utility model discloses an omnibearing protector of loading moment for use in engineering. The utility model comprises twenty two parts of a pressure sensing part, a platform inclination part, a boom angle part, a turning direction detecting part, a control part, etc. According to the load moment equilibrium principle, a computer is used to do real-time processing and control for the load moment of the lifting state, the luffing state and the turning state; thus, the moment balance and the safe operation can be realized when the crane is in overload running, and the purpose of the omnibearing protection can be achieved.
Description
The utility model belongs to the improvement of crane load moment protector.
At present, both at home and abroad the force moment protection on crane mainly shows as aspect two of hoisting heavy overload force moment protection and the luffing overload force moment protections.That is to say, mainly embody a concentrated expression of the overload force moment protection in the plane that crane arm and weight constitute.As the AWL-U type limiter of moment in the many fields of Amada Co., Ltd. and Beijing electromechanics Research Institute and Beijing mechanical investigations the WLX-QY20 type microcomputer limiter of moment of common development, all belong to the overload force moment protection in the plane.But hoisting crane is in when operation, except lifting and luffing overload cause tumble, very important factor in addition.Here it is hoisting crane causes under by sinking of ground or other situation tumbling of causing when turning round from high to lower.This revolution overload is compared with hanging more difficult assurance of overload of overload and luffing and control.So the accident rate height of revolution overload, often fatal crass.
The purpose of this utility model is tumbled for preventing that crane loading, luffing and revolution from overloading exactly, ensures the load moment omnibearing protection device of crane safety operation and design and manufacturing.
Formation of the present utility model and mechanism can be illustrated by down routine each figure, wherein:
Working state schematic representation (θ is a negative angle) when Fig. 1 is the hoisting crane hypsokinesis;
Fig. 2 is hoisting crane working state schematic representation (θ is a zero degree) when horizontal surface;
Working state schematic representation when Fig. 3 leans forward for hoisting crane (θ is a positive angle);
Fig. 4 is platform inclination detector concept figure;
Fig. 5 is the lifting performance curve of existing hoisting crane;
Fig. 6 is a lifting performance curve of the present utility model;
Fig. 7 constitutes scheme drawing for the utility model system;
Fig. 8 is the utility model system works schematic diagram;
Fig. 9 detects schematic diagram for gyratory directions.
The meaning of various symbols is that R is the lifting work radius among the figure, is called amplitude usually; A is the distance of hoisting crane center to the crane counterweight center of gravity; B is the distance of hoisting crane center to the arm butt; W
1Be crane counterweight; W
2Be hoisting crane lifted weight thing; A ' is that the crane rotation center is to the projected length of crane counterweight center of gravity on horizon; B ' is that the crane rotation center is to the projected length of crane arm butt on horizon; θ is the arm inclination angle.
The meaning of each digital code is crane rotation center (1) crane rotation platform (2), counterweight W in Fig. 1, Fig. 2, Fig. 3
1(3), arm (4), lifted weight thing W
2(5), weight (6).Te among Fig. 5, Fig. 6 is a crane rating.
Fig. 7 has showed that system of the present utility model constitutes, and it has pressure sensor (9), platform inclination detector (10).Boom angle detector (11), gyratory directions detector (12), the anti-inertia impact controller (13) of revolution overload, revolution the overloads (14), promote luffing the overloads (15), early warning/alarm sound lamp dimmer (16), work condition state controller (17), gross weight/net weight master cock (18) gross weight/net weight data display window (19), rated load weight/hoisting depth/arm inclination angle/amplitude display control switch (20), (21), various parameter display windows (22), maximum/inclination minimum alarm display lamp (23), moment pre-alarm display lamp (24), revolution control display lamp (25), moment overload display lamp (26), load shedding control show percent master cock (27), self check master cock (28), system reset master cock (29), display window state table (30) is totally 22 parts.Fig. 4 is the concrete formation of platform inclination detector (10), and it has variable gear (7), linearity potentiometer (8) and weight (6), totally 3 parts.Fig. 9 is the concrete formation of gyratory directions detector (12), and it has base (31), left-hand identification brush (32), stretcher (33), carbon brush support (34), dextrad identification brush (35) and non-rotating identification brush (36), totally 6 parts.
Principle of work of the present utility model is: respectively power, angle and inclination are become electric signal by pressure sensor (9), boom angle detector (11) and platform inclination detector (10), after respective handling, deliver to the A/D A and D converter simultaneously, state moment variations situations such as luffing, lifting, revolution are handled in real time by computing machine.When detecting moment and not conforming to when overloading (hoisting crane do arbitrary operation) with the crane loading balancing torque; computing machine just sends instruction immediately; automatically forbid that hoisting crane moment changes to dangerous direction; guaranteed hoisting crane when lifting, luffing and the revolution moment balance and safe operation has reached the purpose of omnibearing protection.
Moment balance relation of the present utility model can be borrowed Fig. 2, Fig. 3 explanation:
As can be seen from Figure 2, hoisting crane hoisting heavy W on hard level ground
2The time, concern that according to moment balance obtaining the moment-equilibrium equation formula is:
W
1a＝W
2(R+b)…………………(1)
The heavy W of thing when by (1) formula as can be known, to cause moment unbalance be the principal element of overload crane
2With amplitude R.So as long as adopt boom angle detector detected amplitude R and adopts pressure sensor to detect weight W
2, just can judge the situation of moment variations, thereby carry out force moment protection.
As can be seen from Figure 3, hoisting crane is in forward-lean state when work, and when promptly hoisting crane was parked in forward inclination ground or has a ground to sink in operational process, situation had just been made a world of difference, and moment-equilibrium equation formula at this moment can be expressed as:
W
1A '=W
2(R+b ') be a '=aCOS θ again
B '=bCOS θ is W then
1ACOS θ=W
2(R+bCOS θ) ... (2)
By (2) formula as can be known, cause the factor of moment unbalance to have 3, i.e. the heavy W of thing
2, amplitude R and inclination Q.Compared with the above case, increase by one here and influenced the unbalanced factor of moment---inclination θ.Therefore, the utility model has been set up a platform inclination detector and a gyratory directions detector shown in Figure 9 as shown in Figure 4.Like this for W
2, R and three physical quantitys of θ under the arbitrary running state of hoisting crane, the situation that moment changes, computing machine all can in time be handled, and reaches the purpose of comprehensive control.
Fig. 7 and Fig. 8 combine and just can constitute embodiment of the present utility model.Used device all is general parts, no specific (special) requirements.Use the result to show that the utility model has following function by reality:
(1) decimal scale shows the percentum of gross weight, net weight, angle, amplitude, permission angle, rated load weight, lift heavy and rated load weight.
(2) can store the various working curve, satisfy stepless warning of each operating mode and moment and protect automatically.
(3) can under arbitrary (lifting, luffing, revolution) overload situation, only allow hoisting crane to move, forbid that automatically hoisting crane moves to dangerous direction, accomplishes comprehensive force moment protection to clearing bearing.
(4) have various compensation characteristic curves, to " the temperature drift " and " zero drift " of sensor but the automatically regulating compensation.
(5) one week of crane rotation, can detect the number of degrees of the direction of tilt of hoisting crane automatically.
(6) has self-test capability.
(7) be provided with load shedding control, according to actual needs, load shedding is used hoisting crane arbitrarily, and whenever presses once load shedding 5%.
The utility model distinguishing feature compared with prior art is that moment of gyration control system and the multistage load shedding control of energy are arranged.It is little, in light weight that the utility model also has a volume, easily installs, and characteristics such as good operation are to be used for the ideal device that crane load moment omnirange is protected.
Claims (1)
1, a kind of crane load moment protector: mainly form, it is characterized in that by pressure sensor, platform inclination detector, boom angle detector, gyratory directions detector, revolution the overloads, lifting luffing the overloads, work condition state controller, parameter display window:
Described platform inclination detector (10) has a full variable gear (7), a linearity potentiometer (8) and a weight (6), totally 3 parts;
Described gyratory directions detector (12) has a base (31), 1 left-hand identification brush (32), 1 stretcher (33), 1 carbon brush support (34), 1 dextrad identification brush (35) and 1 non-rotating identification brush (36), totally 6 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90208610 CN2073869U (en) | 1990-06-11 | 1990-06-11 | Omnibearing protector of loading moment for use in engineering hoister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90208610 CN2073869U (en) | 1990-06-11 | 1990-06-11 | Omnibearing protector of loading moment for use in engineering hoister |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2073869U true CN2073869U (en) | 1991-03-27 |
Family
ID=4888835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90208610 Withdrawn CN2073869U (en) | 1990-06-11 | 1990-06-11 | Omnibearing protector of loading moment for use in engineering hoister |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2073869U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390788A (en) * | 2011-09-14 | 2012-03-28 | 长沙中联重工科技发展股份有限公司 | Anti-tipping control method, device and system and engineering plant |
| CN102502406A (en) * | 2011-10-31 | 2012-06-20 | 中联重科股份有限公司 | Method, controller and device for measuring working parameters of crane boom and crane |
-
1990
- 1990-06-11 CN CN 90208610 patent/CN2073869U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390788A (en) * | 2011-09-14 | 2012-03-28 | 长沙中联重工科技发展股份有限公司 | Anti-tipping control method, device and system and engineering plant |
| CN102390788B (en) * | 2011-09-14 | 2013-08-14 | 中联重科股份有限公司 | Anti-rollover control method, device and system and engineering machinery |
| CN102502406A (en) * | 2011-10-31 | 2012-06-20 | 中联重科股份有限公司 | Method, controller and device for measuring working parameters of crane boom and crane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |