CN2091853U - Controller of stability for derrick car - Google Patents
Controller of stability for derrick car Download PDFInfo
- Publication number
- CN2091853U CN2091853U CN 91216423 CN91216423U CN2091853U CN 2091853 U CN2091853 U CN 2091853U CN 91216423 CN91216423 CN 91216423 CN 91216423 U CN91216423 U CN 91216423U CN 2091853 U CN2091853 U CN 2091853U
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- CN
- China
- Prior art keywords
- oil cylinder
- stability
- control
- adder
- control setup
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Abstract
The utility model relates to a controller of stability for derrick car which is automobile tyre type. The extreme of the stability of the derrick car is determined through measuring the sum of the supporting counter force of two support legs which are neighbouring. The controller of stability for derrick car comprises two particular control schemes which are hydraulic pressure type and electron type. The hydraulic pressure type adopts a controlling oil cylinder, one end is a control cavity which connects with a lower spacing pressure meter which is electric contact type, and the other end is a sensing cavity with two uniform sections, and the two uniform sections are respectively connected with support oil cylinders. The electron type adopts a load detector which is strain gage support oil cylinder. The pressure signals of the two neighbouring support leg detectors are imported into a driven circuit after being treated by an adder and a comparator. The device can ensure the stability of the derrick car as well as exerting the hoisting capacity fully.
Description
The utility model relates to a kind of motor tire formula crane stability control setup, belongs to crane safety device technique field.
In using, motor tire formula hoisting crane has two maximum safe limites, the one, the strength limit of crane arm, the one, the limit of stability of complete machine.Existing this class hoisting crane adopts the electronic moment killer to control heavy lift more, thereby guarantees safety in utilization, but statistical information shows to have only 23% capsizing case because of due to the overload, and about 50% capsizing case all occurs in and non-overloading situation under.In fact because of supporting injustice, setting of ground tiltedly hangs, force of inertia, and factors such as centnifugal force and wind-force all can cause hoisting crane to topple under the non-overloading situation, so list can not guarantee that with limiter of moment hoisting crane is safe in utilization.Disclosed automobile crane safety device has increased a complete machine stability control setup among the CN85106494, it is provided with a pressure spring switch in each support base is carried out, all be lower than the foundation that specified value is a Stability Control with the reaction of bearing value of carrying out at the bottom of any two adjacent supports, this technical scheme has two major defects, the principle of design of first Stability Control does not consider to carry out at the bottom of adjacent two the influence of reaction of bearing sum numerical value change to stability, only carried out the limit of a reaction of bearing of regulation each end, this design plan can make hoisting crane lose a part of load-carrying ability in the practicality; It two is that used jack pressure sensor service precision and reliability is relatively poor.
The purpose of this utility model provides a kind of safety device that uses reliably and can give full play to load-carrying ability for the complete machine stability control of automobile crane.
For achieving the above object, basic design of the present utility model is to compare as stable foundation with adjacent two supporting leg reaction of bearing sums and limit value, and adopt following two technical schemes to realize the foregoing invention design: the one, hydraulic control setup, the 2nd, electron type control setup.
The hydraulic control setup is provided with the control oil cylinder identical with support oil cylinder quantity, one end of described control oil cylinder plunger is a control chamber, an electric contact type pressure gauge is communicated with this chamber, the other end is provided with two mutual disconnected sensing chambeies, the ram area in two sensing chambeies is identical, and every adjacent two support oil cylinders are connected with two sensing chambeies of a control oil cylinder respectively through hydraulic tubing.Four support oil cylinders need be provided with four control oil cylinders, each control the lower limit open contact switch in the oil cylinder electric contact type pressure gauge and connect after be serially connected with safety signal control or warning driving circuit.
Press the support oil cylinder design discipline, support oil cylinder retraction " soft leg " phenomenon that is caused for avoiding hydraulic control oil circuit to reveal, at support oil cylinder safe plunger of serial connection in the oil pipe line that is connected with control oil cylinder sensing chamber, for steel pipe is connected or direct connection, and can adopt flexible pipe to be connected between the control oil cylinder between this plunger and support oil cylinder.
During use, the oil circuit pressure of adjacent two support oil cylinders is added to respectively on the sensing chamber plunger of control oil cylinder, because sensing chamber ram area is identical, so the force value of the control chamber of control oil cylinder is the aviation value of two sensing cavity pressure values, when this aviation value is lower than specified value, the lower position switch closure of electric contact type pressure gauge, total control circuit connects, send electric signal, make hoisting crane stop load lifting, semi-girder, amplitude increases and the revolution action, or reports to the police, thereby guarantee the stability of hoisting crane, the lower limit place value of crane stability different pressures table is calculated according to the orientation of adjacent two supporting legs of correspondence and is determined and scalable during owing to the different azimuth operation.
The electron type control device for stability is made up of support oil cylinder detectors of load and electronic controller, it is the strain-gauge that is provided with at the support oil cylinder piston rod head that described load detects, described electronic controller is by adder, comparator, actuator is formed, a corresponding adder in the detectors of load of two adjacent support oil cylinders and the electronic controller constitutes the two-way adder of anti-phase input, this adder output signal is added in the end of oppisite phase of corresponding comparator, be added in the in-phase end of this comparator to constant potential, constitute an any level comparator, each comparator output terminal is with driver input end after diode-isolated and connects input state, when the magnitude of voltage of one group of adjacent two support oil cylinder bearing force sum of reflection of exporting when arbitrary adder is lower than given magnitude of voltage, the comparator output voltage is positive maxim, by devices such as driver control electromagnetic relief valves, stop the dangerous play of hoisting crane, the given magnitude of voltage of comparator can calculate according to balancing torque to be determined and adjustment.
The principle of the utility model present general inventive concept is as follows:
If M
0Be respectively the balancing torque of hoisting crane and allow capsizing moment with M, K is a stability coefficient, then
K＝M
0／M
H is the line and be in distance between two supporting legs on the non-line that topples of toppling if make, and N1 and N2 are respectively the supporting power of two supporting legs, then
M
0＝M＋（N1＋N2）·H
Or N1+N2=(M
0-M)/H=M
0(1-1/K)/H
As long as the value of N1+N2 is not less than above-mentioned limit value so make in fact, just can guarantee stability, and this controlling schemes can directly comprise influences such as inertia loading, wind load, only need K is decided to be 1.15.If by the mensuration of single supporting leg bearing force lower limit is come control stiffness, from above analysis as can be known, its lower limit N must be decided to be equally:
N＝（M
0－M）／H
Because be in any one supporting leg bearing force lower limit on the non-line that topples determine must consider another supporting leg bearing force this situation that equals zero, thus, the limit value of two supporting leg bearing force sums is 2N, causes hoisting crane to lose a part of load-carrying ability.
According to the influence of the various factors outside the designed motor tire formula hoisting capacity machine stability safety control energy Comprehensive Control lifted load of above-mentioned two kinds of technology to stability, comprise and support injustice, setting of ground, wind load, inertia loading, centnifugal force and tiltedly hanging etc., when guaranteeing crane safety, can give full play to the load-carrying ability of equipment again, device therefor precision height, the life-span is long, good reliability, effect are better than described supporting leg separation type detection scheme.
Specify below in conjunction with drawings and Examples.
Fig. 1 is hydraulic control device for stability annexation figure.
Fig. 2 is a control cylinder structure scheme drawing.
Fig. 3 is a safety post plug structure scheme drawing.
Fig. 4 is the circuit connection diagram of device shown in Figure 1.
Fig. 5 is an electron type control device for stability support oil cylinder detectors of load structural representation.
Fig. 6 is the electronic controller schematic circuit diagram.
Adjacent two support oil cylinders 1,2 are through steel pipe or directly be connected with safe plunger 3,4 among Fig. 1, the other end of main plug 3,4 is connected with the sensing chamber 6,7 of control oil cylinder 5 respectively, electric contact type presses table 8 to be connected with the control chamber 9 of control oil cylinder, two areas of plunger 10 sensing chambeies 6,7 one sides are identical, when control oil cylinder 5 was in state of equilibrium, the pressure of control chamber 9 was the aviation value of two sensing chambeies, 6,7 pressure.The lower position switch of selecting compression indicator 8 for use is a cabinet switch, when the pressure sum of adjacent two support oil cylinders 1,2 is lower than specified value, the pressure meter switch closure, safe plunger 3,4 separates the working oil path of support oil cylinder 1,2 with control oil channel, and assurance oil pressure transmission, when control oil channel generation leakage accident, " soft leg " phenomenon can not take place in supporting leg.
Among Fig. 2 in the control oil cylinder 5 plunger 10 tops be control chamber 9, compression indicator 8 is connected on the cylinder cap, switch 11 be compression indicator 8 lower position switch, filler port 12 is used for control chamber 9 oilings, seals with oil is stifled after the oiling.Plunger 10 bottoms are divided into two uniform cross section sensing chambeies 6 and 7, and its cooresponding pipe interface 13,14 is connected with adjacent two support oil cylinders through the safety plunger respectively.Also be respectively equipped with air bleed hole 15,16 on the sensing chamber 6,7, exit during oiling, fill with the oil back and block up sealing with oil.
Safe plunger 3 one ends are connected with support oil cylinder among Fig. 3, and the other end is provided with filler port 17 and interface 18, interface 18 with inductive sensing lumen road is connected, filler port 17 finishes the back with the stifled sealing of oil in oiling.The diameter of safe plunger 3 only is 1/10 of a support oil cylinder diameter generally, so both stroke ratios are 100:1, when the control oil channel pressure release, only support oil cylinder is produced minimal effects, and control oil channel exerts an influence no longer to the supporting leg working oil path after safe plunger 3 is pushed into the termination.
Fig. 4 is the driving circuit scheme drawing.Four compression indicator lower position switch K1-K4 that control on the oil cylinder are the control circuit that state in parallel is connected to relay J, handle each sports equipment of hoisting crane by the contact switch of relay J.When the pressure of control chamber is less than specified value in any one control oil cylinder, the driving circuit admittance, the relay J adhesive stops the hoisting crane dangerous play.
Strain-gauge YR is attached on the pistons work head 22 of support oil cylinder 21 among Fig. 5 and Fig. 6, and the waterproof latch 23 of the connection lead of strain-gauge YR on working head 22 picks out, the reaction of bearing of the variation reflection support oil cylinder 21 of strain-gauge YR resistance.A support oil cylinder can adopt two strain-gauge YR1 and YR2, is the contraposition bridge-type with resistance R 1, R2 and is connected, and can improve detection sensitivity.Said apparatus constitutes a supporting leg pressure sensor 24.Adjacent two supporting leg sensors, 24 signal output parts are through resistance R 3, the end of oppisite phase of R4 input computing amplifier element A1, its in-phase end is through resistance R 5 ground connection, feedback resistance RF connects mouth and the inverting input of amplifier element A1, constitute anti-phase input two-way adder 25, adder 25 output signals are added to the inverting input of computing amplifier element A2 through resistance R 6, be added to the in-phase input end of this element A2 for through resistance R 7 constant potential Vr, constitute comparator 26, each comparator 26 mouth is after diode D isolates and meet driving amplifying circuit 27 input ends that are added to transistor T, control relay J.The voltage that is added in element A2 inverting input when any one adder 25 is when being added in the magnitude of voltage of element A2 in-phase input end for constant potential Vr, element A2 exports a positive voltage signal, make the transistor T saturation conduction of driving circuit 27, the relay J adhesive, control hoisting crane running gear stops dangerous play.Because crane stability difference during the different azimuth operation, the constant potential Vr that gives of comparator 26 chooses according to cooresponding adjacent legs, and available resistance R 7 is regulated.
Claims (5)
1, a kind of motor tire formula crane stability control setup, hoisting crane is supported by support oil cylinder, it is characterized in that described control setup is the hydraulic device, a kind of control oil cylinder, one end of its plunger is a control chamber, be connected with electric contact type pressure gauge, with manometric lower position switch is master cock, the other end is two isolated uniform cross section sensing chambeies, be connected with adjacent two support oil cylinders through the safety plunger respectively, each is serially connected with the safety control driving circuit after controlling the lower position switch parallel connection of oil cylinder working-pressure table.
2, crane stability control setup according to claim 1 is characterized in that the control chamber of described control oil cylinder is provided with oil hole, and there is air bleed hole in its sensing chamber.
3, crane stability control setup according to claim 1 and 2 is characterized in that described safe plunger is provided with oil hole with the end that the control oil cylinder is communicated with.
4, a kind of motor tire formula crane stability control setup, hoisting crane is supported by support oil cylinder, it is characterized in that described control setup is an electron type, the pressure sensor that detects supporting leg load is the strain-gauge that is arranged on the support oil cylinder piston rod head, an electronic controller, comprise adder, comparator and driving circuit, adder is anti-phase input two-way adder, the adder input end is connected with two adjacent supporting leg strain gauge pressure sensors, comparator is any level comparator, its inverting input connects a cooresponding adder output, and in-phase input end connects to constant potential, and each comparator output terminal is through diode-isolated and connect the input driving circuit input end.
5,, it is characterized in that described strain gauge pressure sensor is that two strain-gauge contraposition bridge-types connect by the described crane stability control setup of claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91216423 CN2091853U (en) | 1991-06-13 | 1991-06-13 | Controller of stability for derrick car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91216423 CN2091853U (en) | 1991-06-13 | 1991-06-13 | Controller of stability for derrick car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2091853U true CN2091853U (en) | 1992-01-01 |
Family
ID=4924331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91216423 Withdrawn CN2091853U (en) | 1991-06-13 | 1991-06-13 | Controller of stability for derrick car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2091853U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303496A (en) * | 2011-06-03 | 2012-01-04 | 陈海波 | Tire liftoff detection control system for launch vehicle |
| CN109110651A (en) * | 2018-10-18 | 2019-01-01 | 徐州市凯诺机械有限公司 | The warning device of hydraulic prop on a kind of crane |
| CN114180453A (en) * | 2022-02-17 | 2022-03-15 | 河南工学院 | Novel anti-tipping mechanism of crane |
| CN114455474A (en) * | 2021-12-23 | 2022-05-10 | 中联重科股份有限公司 | Method and device for determining stability of engineering equipment and engineering equipment |
-
1991
- 1991-06-13 CN CN 91216423 patent/CN2091853U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303496A (en) * | 2011-06-03 | 2012-01-04 | 陈海波 | Tire liftoff detection control system for launch vehicle |
| CN102303496B (en) * | 2011-06-03 | 2013-06-12 | 昆山航天智能技术有限公司 | Tire liftoff detection control system for launch vehicle |
| CN109110651A (en) * | 2018-10-18 | 2019-01-01 | 徐州市凯诺机械有限公司 | The warning device of hydraulic prop on a kind of crane |
| CN114455474A (en) * | 2021-12-23 | 2022-05-10 | 中联重科股份有限公司 | Method and device for determining stability of engineering equipment and engineering equipment |
| CN114180453A (en) * | 2022-02-17 | 2022-03-15 | 河南工学院 | Novel anti-tipping mechanism of 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 | ||
| 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 |