CN103640542A - Rollover prevention device for fire truck chassis and control method - Google Patents
Rollover prevention device for fire truck chassis and control method Download PDFInfo
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- CN103640542A CN103640542A CN201310655075.9A CN201310655075A CN103640542A CN 103640542 A CN103640542 A CN 103640542A CN 201310655075 A CN201310655075 A CN 201310655075A CN 103640542 A CN103640542 A CN 103640542A
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Abstract
The invention relates to a rollover prevention device for a fire truck chassis and a control method. The device comprises a PLC, a tilt angle sensor and a lower truck action suppression mechanism, wherein the PLC, the tilt angle sensor and the lower truck action suppression mechanism are arranged on the fire truck chassis; the tilt angle sensor is connected with the PLC and outputs the current tilt angle of the fire truck chassis to the PLC; the lower truck action suppression mechanism is connected with the PLC and controls a switching valve and a feedback valve according to a tilt control signal output by the PLC to achieve lower truck action suppression when the fire truck chassis tilts excessively, wherein the switching valve is used for switching between an upper truck oil way and a lower truck oil way, and the feedback valve is used for creating driving pressure on the lower portion of a truck. The rollover prevention device can timely detect and control the change of the tilt angle of the fire truck chassis when vertical supporting legs do not stretch out synchronously, thereby effectively preventing rollover accidents caused by non-synchronization of stretching out the vertical supporting legs.
Description
Technical field
The present invention relates to fire-fighting mechanical field, relate in particular to a kind of chassis of fire engine anti-tilting apparatus and control method.
Background technology
Elevating fire truck is a kind ofly to have chassis special, lifting arm support is installed, and is operated by professional operating personal, fire fighter is transported to certain altitude, to realize the fire-fighting vehicle of height rescue or fire-fighting operation.This fire extinguishing tanker, when carrying out rescue task, first needs the vertical leg of getting off (as shown in Figure 1) to stretch out, and guarantees that four vertical leg are stretched out rear chassis angle and horizontal plane angle is less than certain angle.
At present, the operation of the supporting leg of fire extinguishing tanker can adopt hand-hydraulic valve rod to control the action of Vertical Cylinders, also can adopt electronic button to controller signals, to carry out the auto-action of Vertical Cylinders.By manual and automatic lifting vertical leg, arrive certain altitude, make chassis and horizontal plane angle within the specific limits, but if there is mechanical breakdown, human operational error or other peripheral detector switch problems, cause having one or more of (being less than or equal to 3) vertical leg not hoist, can cause vertical leg one side having hoisted higher than an other side, cause vehicle knockdown, even overturn.But these supporting leg operations can only make to get off, vertical leg hoists, and can not automatically prevent slide-out problem.
Summary of the invention
The object of the invention is to propose a kind of chassis of fire engine anti-tilting apparatus and control method, can effectively prevent that vertical leg from stretching out the asynchronous overthrow accident causing.
For achieving the above object, the invention provides a kind of chassis of fire engine anti-tilting apparatus, comprise: be arranged on the PLC controller on chassis of fire engine, obliquity sensor and the action of getting off suppress mechanism, described obliquity sensor is connected with described PLC controller, and to described PLC controller, export the current angle of inclination of described chassis of fire engine, the described action of getting off suppresses mechanism and is connected with described PLC controller, according to the skewed control signal of described PLC controller output on fire extinguishing tanker for switching the transfer valve of the oil circuit of getting on or off the bus and for controlling at the feedback valve of setting up driving pressure of getting off, the action of getting off when realizing described chassis of fire engine overbank suppresses.
Further, the described action of getting off suppresses mechanism and comprises: the first relay and the second relay, between the pin of described PLC controller output skewed control signal and common port, be connected in series with the coil of described the first relay, the coil of described the second relay is connected with the switch of described the first relay, and be connected between DC power supply terminal and common port, the switch of described the second relay is arranged between DC power supply terminal and described transfer valve and described feedback valve, transfer valve or described feedback valve described in can gating, described PLC controller is when output skewed control signal, by described the first relay and described the second relay, make described transfer valve connect electricity, described feedback valve power-off.
Further, also comprise combined aural and visual alarm, described combined aural and visual alarm is connected in series between the pin and common port of described PLC controller output alarm signal.
Further, described the first relay is power-off protection, and the switch of described the first relay is open contact.
Further, described the first relay be electric protection, the switch of described the first relay is normally closed contact.
Further, also comprise manual/auto select switch, the 3rd relay and the first diode, described manual/auto select switch is arranged between the switch of DC power supply terminal and described the first relay and the pin of the automatic selector switch signal of described PLC controller input, the pin of the switch of the first relay or the input of the automatic selector switch signal of described PLC controller described in can gating, between the pin of described PLC controller output automatic operation signal and described feedback valve, be connected in series with switch and described first diode of described the first relay, the switch of the first relay described in the anodic bonding of described the first diode, negative electrode connects described feedback valve, the two ends of the coil of described the 3rd relay are connected with common port with the anode of described the first diode respectively, the switch of described the 3rd relay is connected in series between the switch and described transfer valve of described the second relay.
Further, also comprise safety switch and the second diode, the anode of described the second diode is connected with the pin of described PLC controller output skewed control signal, negative electrode is connected with the coil of described the first relay, and described safety switch is connected in series between DC power supply terminal and the negative electrode of described the second diode.
Further, described safety switch is automatic reset switch.
Further, described obliquity sensor is double-shaft tilt angle sensor.
For achieving the above object, the invention provides a kind of control method based on aforementioned chassis of fire engine anti-tilting apparatus, comprising:
PLC controller receives the current angle of inclination of the chassis of fire engine of obliquity sensor input, and described current angle of inclination and default angle of inclination value are compared, if surpass described default angle of inclination value, to the action of getting off, suppress the first relay output skewed control signal of mechanism, the first relay and the second relay that the described action of getting off suppresses mechanism make for switching the transfer valve of the oil circuit of getting on or off the bus, to connect electricity on fire extinguishing tanker according to described skewed control signal, make on fire extinguishing tanker for setting up the feedback valve power-off of driving pressure getting off, otherwise not to described the first relay output skewed control signal, described the first relay and the second relay make described transfer valve power-off, described feedback valve connects electricity.
Based on technique scheme, the present invention detects the current angle of inclination of chassis of fire engine by obliquity sensor, and PLC controller is exported skewed control signal according to current angle of inclination, by the action of getting off that receives skewed control signal, suppressing mechanism controls transfer valve and feedback valve, because transfer valve and feedback valve are respectively get on or off the bus oil circuit and set up the valve of the driving pressure of getting off for distinguishing to switch, therefore just set up from the current angle of inclination of detection chassis of fire engine to the association to transfer valve and the control action of feedback valve, when vertical leg is stretched out when asynchronous, can detect in time the variation at chassis of fire engine angle of inclination, controlled in time, thereby effectively prevent that vertical leg from stretching out the asynchronous overthrow accident causing.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation on existing elevating fire truck chassis.
Fig. 2 is the schematic circuit diagram of the first embodiment of chassis of fire engine anti-tilting apparatus of the present invention.
Fig. 3 is the schematic circuit diagram of the second embodiment of chassis of fire engine anti-tilting apparatus of the present invention.
Fig. 4 is the schematic circuit diagram of the 3rd embodiment of chassis of fire engine anti-tilting apparatus of the present invention.
Fig. 5 is the schematic circuit diagram of the 4th embodiment of chassis of fire engine anti-tilting apparatus of the present invention.
Fig. 6 is the schematic circuit diagram of the 5th embodiment of chassis of fire engine anti-tilting apparatus of the present invention.
The specific embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
As shown in Figure 2, be the schematic circuit diagram of the first embodiment of chassis of fire engine anti-tilting apparatus of the present invention.In the present embodiment, chassis of fire engine anti-tilting apparatus comprises: be arranged on PLC controller 2, the obliquity sensor 1 on chassis of fire engine and get off action inhibition mechanism, obliquity sensor 1 is connected with PLC controller 2, and the current angle of inclination of exporting chassis of fire engines to PLC controller 2.The action of getting off suppresses mechanism and is connected with PLC controller 2, according to the skewed control signal of PLC controller 2 output on fire extinguishing tanker for switching the transfer valve 4 of the oil circuit of getting on or off the bus and for controlling at the feedback valve 5 of setting up driving pressure of getting off, the action of getting off when realizing chassis of fire engine overbank suppresses.
In actual fire extinguishing tanker control system, the oil circuit of getting on or off the bus is switched by transfer valve, specifically, and when transfer valve is charged, oil circuit is being got on the bus, when transfer valve dead electricity, there is road getting off, when oil circuit is when getting on the bus, get off and cannot carry out the flexible operation of supporting leg, otherwise, only have oil circuit when getting off, and can carry out the expanding-contracting action of supporting leg can set up driving pressure time.Getting off while moving, feedback valve need to be in charged state, to set up the driving pressure of getting off, if feedback valve dead electricity is got off and cannot be moved.
Control system based on such, the action of getting off suppresses mechanism can react by the inclined degree to chassis of fire engine under the control command of PLC controller, stops in time stretching out of supporting leg, and then avoid the generation of overthrow accident when chassis of fire engine overbank.
The implementation that the action of getting off suppresses mechanism has various ways, the invention provides the example that some have realizability.Wherein, the action of getting off shown in Fig. 2 suppresses mechanism and comprises: the first relay K 1 and the second relay K 2, these two relays all have coil and switch, between the pin Y1 of PLC controller 2 output skewed control signals and common port (in figure " "), be connected in series with the coil of the first relay K 1, and the coil of the second relay K 2 is connected with the switch of the first relay K 1, and be connected between DC power supply terminal (in figure+24V) and common port, the switch of the second relay K 2 is arranged between DC power supply terminal and transfer valve 4 and feedback valve 5, optional direction changeover valve 4 or feedback valve 5, PLC controller 2 is when output skewed control signal, by the first relay K 1 and the second relay K 2, make transfer valve 4 connect electricity, feedback valve 5 power-off.At DC power supply terminal, insurance 1 can also be set and avoid overcurrent.
In the present embodiment, obliquity sensor is preferably double-shaft tilt angle sensor, and the first relay is preferably power-off protection, and corresponding, the switch of the first relay is open contact.In another embodiment, can also adopt other obliquity sensor, and the first relay also can be selected to obtain electric protection, corresponding, the switch of the first relay is normally closed contact.
Take Fig. 2 embodiment as example, anti-tipping process is done some to explanation below.First, the variation at the angle of inclination of the chassis of fire engine at obliquity sensor 1 its place of measurement, and input to PLC controller 2, PLC controller 2 is preset the comparison of angle of inclination value according to the current angle of inclination of chassis of fire engine, suppose that default angle of inclination value is 3 °, so when PLC controller 2 detects current angle of inclination and is greater than 3 °, to the action of getting off, suppress the first relay K 1 output skewed control signal of mechanism, this skewed control signal is the low level less than or equal to common port voltage, make the coil losing electricity of the first relay K 1, and then the switch of the first relay K 1 is disconnected, switch disconnection due to the first relay K 1, make the coil losing electricity of the second relay K 2 in this loop, cause switch and transfer valve 4 loops, place of the second relay K 2 to be connected, and disconnect feedback valve 5 loops, place.Before mention, when transfer valve obtains charged oil circuit when electric, getting on the bus, during feedback valve dead electricity, can not set up driving pressure getting off, therefore getting off and cannot proceed landing leg stretching, thereby avoided the further increasing of chassis of fire engine inclined degree, and then avoided the generation of overthrow accident.
Otherwise, if 3 ° of current angle of inclination less thaies, represent still to allow at present the inclination of this degree, now, what the Y1 pin of PLC controller 2 was exported is high level, make the coil of the first relay K 1 obtain electric, and then make the switch of the first relay K 1 closed, because the switch of the first relay K 1 is closed, make the coil of the second relay K 2 in this loop obtain electric, cause switch and transfer valve 4 loops, place of the second relay K 2 to disconnect, and connect feedback valve 5 loops, place.Before mention, when transfer valve dead electricity, charged oil circuit is being got off, feedback valve obtains when electric and could set up driving pressure getting off, and therefore now gets off and can carry out normal landing leg stretching.
Why PLC controller is usingd low level as skewed control signal, be mainly consider if PLC controller because of certain reason power-off, can make to get off and can not carry out landing leg stretching, avoid occurring because the power-off of PLC controller causes overthrow accident, thus the safety that has improved whole system.
As shown in Figure 3, be the schematic circuit diagram of the second embodiment of chassis of fire engine anti-tilting apparatus of the present invention.Compare with a upper embodiment, the present embodiment also comprises combined aural and visual alarm 6, this combined aural and visual alarm 6 is connected in series between the pin Y2 and common port of PLC controller 2 output alarm signals, when suppressing mechanism to the action of getting off, sends while tumbling control signal by PLC controller 2, can also make combined aural and visual alarm 6 obtain electric simultaneously, and then make it to sound and light report to the police, the supporting leg action of getting off that prompting operation person is current is restricted, operator can get information about the situation of current landing leg stretching, and then takes corresponding treatment measures.
The operation of vertical leg can comprise manual and automatic two kinds of patterns, and what is called is manually that operator carries out the flexible operation of manual vertical leg by operation hydraulic valve stem, and automatically by PLC controller, the flexible operation of vertical leg is controlled.As shown in Figure 4, be the schematic circuit diagram of the 3rd embodiment of chassis of fire engine anti-tilting apparatus of the present invention.Compare with a upper embodiment, the present embodiment also comprises manual/auto select switch 7, the 3rd relay K 3 and the first diode 8, manual/auto select switch 7 is arranged between the switch of DC power supply terminal and the first relay K 1 and the pin X1 of the automatic selector switch signal of PLC controller 2 input, can the switch of gating the first relay K 1 or the pin X1 of the automatic selector switch signal of PLC controller 2 input, between the pin Y3 of PLC controller 2 output automatic operation signals and feedback valve 5, be connected in series with switch and first diode 8 of the first relay K 1, the switch of anodic bonding first relay K 1 of the first diode 8, negative electrode connects feedback valve 5, the two ends of the coil of the 3rd relay K 3 are connected with common port with the anode of the first diode 8 respectively, the switch of the 3rd relay K 3 is connected in series between the switch and transfer valve 4 of the second relay K 2.
In the present embodiment, increase manual/auto select switch 7 and be used for carrying out the switching between manual mode and automatic mode, when the loop, switch place of tangential the first relay K 1 of manual/auto select switch 7, the pin X1 of PLC controller 2 must not be electric, it is now manual mode, under manual mode, the pin Y3 of PLC controller 2 can not send automatic operation signal, and operate hydraulic valve stem by operator, control the flexible of vertical leg, about the hydraulic circuit of vertical leg is due to of the present invention associated little, therefore it is repeated no more.Otherwise the pin X1 when manual/auto select switch 7 tangential PLC controllers 2, obtains pin X1 electric, enters automatic mode, under automatic mode, PLC controller 2 can send automatic operation signal to feedback valve 5 by pin Y3.
Take Fig. 4 embodiment as example, anti-tipping process is done some to explanation below.Under manual mode, DC power supply terminal is connected in the loop at the common place of coil of the switch of the first relay K 1 and the second relay K 2, and the pin X1 of PLC controller must not be electric, and pin Y3 does not export automatic operation signal.In operator's M/C hydraulic valve stem makes process that vertical leg hoists, the variation at the angle of inclination of the chassis of fire engine at obliquity sensor 1 its place of measurement, and input to PLC controller 2, PLC controller 2 is preset the comparison of angle of inclination value according to the current angle of inclination of chassis of fire engine, suppose that default angle of inclination value is 3 °, so when PLC controller 2 detects current angle of inclination and is greater than 3 °, to the action of getting off, suppress the first relay K 1 output skewed control signal of mechanism, this skewed control signal is the low level less than or equal to common port voltage, make the coil losing electricity of the first relay K 1, and then the switch of the first relay K 1 is disconnected, switch disconnection due to the first relay K 1, make the coil losing electricity of the second relay K 2 in this loop, cause switch and transfer valve 4 loops, place of the second relay K 2 to be connected, and disconnect feedback valve 5 loops, place.Before mention, when transfer valve obtains charged oil circuit when electric, getting on the bus, during feedback valve dead electricity, can not set up driving pressure getting off, therefore getting off and cannot proceed landing leg stretching, thereby avoided the further increasing of chassis of fire engine inclined degree, and then avoided the generation of overthrow accident.
Otherwise, if 3 ° of current angle of inclination less thaies, represent still to allow at present the inclination of this degree, now, what the Y1 pin of PLC controller 2 was exported is high level, make the coil of the first relay K 1 obtain electric, and then make the switch of the first relay K 1 closed, because the switch of the first relay K 1 is closed, make the coil of the second relay K 2 in this loop obtain electric, cause switch and transfer valve 4 loops, place of the second relay K 2 to disconnect, and connect feedback valve 5 loops, place.Before mention, when transfer valve dead electricity, charged oil circuit is being got off, feedback valve obtains when electric and could set up driving pressure getting off, and therefore now gets off and can carry out normal landing leg stretching.
Under manual mode, no matter whether PLC controller 2 exports skewed control signal, because pin Y3 is all the time without electricity, therefore the coil of the 3rd relay K 3 is all the time also in power failure state, and then the switch of the 3rd relay K 3 in the loop of transfer valve 4 is all the time in closure state, this switch that has also required the 3rd relay K 3 is normally closed contact.
When being switched to automatic mode, between the loop at the common place of coil of the switch of the first relay K 1 and the second relay K 2 and DC power supply terminal, disconnect, and it is electric that the pin X1 of PLC controller is obtained, the pin Y3 output automatic operation signal of PLC controller.In operator's M/C hydraulic valve stem makes process that vertical leg hoists, the variation at the angle of inclination of the chassis of fire engine at obliquity sensor 1 its place of measurement, and input to PLC controller 2, PLC controller 2 is preset the comparison of angle of inclination value according to the current angle of inclination of chassis of fire engine, suppose that default angle of inclination value is 3 °, so when PLC controller 2 detects current angle of inclination and is greater than 3 °, to the action of getting off, suppress the first relay K 1 output skewed control signal of mechanism, this skewed control signal is the low level less than or equal to common port voltage, make the coil losing electricity of the first relay K 1, and then the switch of the first relay K 1 is disconnected, the path that now the pin Y3 of PLC controller 2 is connected to feedback valve 5 is also disconnected, the coil of the second relay K 2 keeps the state of dead electricity, cause switch and transfer valve 4 loops, place of the second relay K 2 to be connected, and disconnect feedback valve 5 loops, place.Before mention, when transfer valve obtains charged oil circuit when electric, getting on the bus, during feedback valve dead electricity, can not set up driving pressure getting off, therefore getting off and cannot proceed landing leg stretching, thereby avoided the further increasing of chassis of fire engine inclined degree, and then avoided the generation of overthrow accident.
Otherwise, if 3 ° of current angle of inclination less thaies, represent still to allow at present the inclination of this degree, now, what the Y1 pin of PLC controller 2 was exported is high level, makes the coil of the first relay K 1 obtain electric, and then make the switch of the first relay K 1 closed, the coil that the pin Y3 of PLC controller 2 makes feedback valve 5 and the 3rd relay K 3 so all electric, the switch of the normally closed contact of the 3rd relay K 3 is disconnected, and then makes transfer valve 4 dead electricity.Before mention, when transfer valve dead electricity, charged oil circuit is being got off, feedback valve obtains when electric and could set up driving pressure getting off, and under the automatic operation instruction that can send according to PLC controller 2 of therefore now getting off, carries out normal landing leg stretching.
The effect of the first diode 8 is to avoid the electric current of feedback valve 5 DC power supply terminal that connects through the circuit at the switch place of the first relay K 1, to arrive the pin Y3 of PLC controller 2, and then causes PLC controller to damage.
As shown in Figure 5, be the schematic circuit diagram of the 4th embodiment of chassis of fire engine anti-tilting apparatus of the present invention.Compare with a upper embodiment, the present embodiment also comprises safety switch 10 and the second diode 9, the anode of the second diode 9 is connected with the pin Y1 of PLC controller output skewed control signal, negative electrode is connected with the coil of the first relay K 1, and safety switch 10 is connected in series between DC power supply terminal and the negative electrode of the second diode 9.Safety switch 10 is mainly used in when chassis of fire engine anti-tilting apparatus has limited landing leg stretching, and that can meet an urgent need regains vertical leg.
When PLC controller 2 suppresses mechanism's output skewed control signal to the action of getting off, the coil losing electricity of the first relay K 1, and then the switch of the first relay K 1 disconnects.If now operator wishes to carry out the recovery operation of vertical leg, need to press safety switch 10, make the coil of the first relay K 1 obtain electric.Under manual mode, the switch of the first relay K 1 all can be closed, makes the second relay K 2 be switched to feedback valve 5 loops, place, makes transfer valve 4 dead electricity, feedback valve 5 obtains electric, and now operator just can realize the recovery operation of vertical leg by operation hydraulic valve stem.
For automatic mode, when PLC controller 2 suppresses mechanism's output skewed control signal to the action of getting off, also can judge the automatic operation instruction of current vertical leg simultaneously, if current automatic operation instruction is vertical leg automatic drawing back, the instruction of pin Y3 output automatic drawing back, if current automatic operation instruction is vertical leg auto-extending, pin Y3 can not export any signal.Like this, when operator presses safety switch 10, the coil of the first relay K 1 obtains electric, make the switch of the first relay K 1 closed, if current automatic operation instruction is vertical leg automatic drawing back, the machine ringing of pin Y3 output will send to feedback valve 5 so, make the coil of the 3rd relay K 3 obtain electric simultaneously, and then the switch of the 3rd relay K 3 is disconnected, make transfer valve 4 power-off, thereby realize the operation of vertical leg automatic drawing back.If current automatic operation instruction is vertical leg auto-extending, for fear of further inclination, now pin Y3 is without electricity, can not export any signal, so feedback valve 5 can not obtain electric, and because the coil of the 3rd relay K 3 is without electricity, therefore transfer valve 4 obtains electric, now can keep the non-retractable state of vertical leg, if wish to carry out recovery operation, need to be switched to manual mode.
Safety switch preferably adopts automatic reset switch, when operator does not press, automatically springs open, and disconnects the coil of the first relay K 1 and being connected of DC power supply terminal.
As shown in Figure 6, be the schematic circuit diagram of the 5th embodiment of chassis of fire engine anti-tilting apparatus of the present invention.Compare with above-mentioned each embodiment, the PLC controller 2 ' of the present embodiment adopts delay process function, when the current angle of inclination of judgement chassis of fire engine surpasses default angle of inclination value, at pin Y1, do not send skewed control signal at once, but the default time gap of time delay, for example 2s or 3s, so just can avoid the impact on anti-tilting apparatus of the sensor signal error that causes because of reasons such as vibrations, guarantees the continuation of operation.
Embodiment based on above-mentioned each chassis of fire engine anti-tilting apparatus, the present invention also provides corresponding chassis of fire engine anti-tipping method, comprise: PLC controller receives the current angle of inclination of the chassis of fire engine of obliquity sensor input, and described current angle of inclination and default angle of inclination value are compared, if surpass described default angle of inclination value, to the action of getting off, suppress the first relay output skewed control signal of mechanism, the first relay and the second relay that the described action of getting off suppresses mechanism make for switching the transfer valve of the oil circuit of getting on or off the bus, to connect electricity on fire extinguishing tanker according to described skewed control signal, make on fire extinguishing tanker for setting up the feedback valve power-off of driving pressure getting off, otherwise not to described the first relay output skewed control signal, described the first relay and the second relay make described transfer valve power-off, described feedback valve connects electricity.
According to the embodiment of each different chassis of fire engine anti-tilting apparatus, further refinement of operating process, specifically, referring to the corresponding anti-tipping process of aforementioned each embodiment, has just repeated no more here.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement the specific embodiment of the present invention; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (10)
1. a chassis of fire engine anti-tilting apparatus, it is characterized in that, comprise: be arranged on the PLC controller on chassis of fire engine, obliquity sensor and the action of getting off suppress mechanism, described obliquity sensor is connected with described PLC controller, and to described PLC controller, export the current angle of inclination of described chassis of fire engine, the described action of getting off suppresses mechanism and is connected with described PLC controller, according to the skewed control signal of described PLC controller output on fire extinguishing tanker for switching the transfer valve of the oil circuit of getting on or off the bus and for controlling at the feedback valve of setting up driving pressure of getting off, the action of getting off when realizing described chassis of fire engine overbank suppresses.
2. chassis of fire engine anti-tilting apparatus according to claim 1, it is characterized in that, the described action of getting off suppresses mechanism and comprises: the first relay and the second relay, between the pin of described PLC controller output skewed control signal and common port, be connected in series with the coil of described the first relay, the coil of described the second relay is connected with the switch of described the first relay, and be connected between DC power supply terminal and common port, the switch of described the second relay is arranged between DC power supply terminal and described transfer valve and described feedback valve, transfer valve or described feedback valve described in can gating, described PLC controller is when output skewed control signal, by described the first relay and described the second relay, make described transfer valve connect electricity, described feedback valve power-off.
3. chassis of fire engine anti-tilting apparatus according to claim 2, is characterized in that, also comprises combined aural and visual alarm, and described combined aural and visual alarm is connected in series between the pin and common port of described PLC controller output alarm signal.
4. chassis of fire engine anti-tilting apparatus according to claim 2, is characterized in that, described the first relay is power-off protection, and the switch of described the first relay is open contact.
5. chassis of fire engine anti-tilting apparatus according to claim 2, is characterized in that, described the first relay be electric protection, the switch of described the first relay is normally closed contact.
6. chassis of fire engine anti-tilting apparatus according to claim 2, it is characterized in that, also comprise manual/auto select switch, the 3rd relay and the first diode, described manual/auto select switch is arranged between the switch of DC power supply terminal and described the first relay and the pin of the automatic selector switch signal of described PLC controller input, the pin of the switch of the first relay or the input of the automatic selector switch signal of described PLC controller described in can gating, between the pin of described PLC controller output automatic operation signal and described feedback valve, be connected in series with switch and described first diode of described the first relay, the switch of the first relay described in the anodic bonding of described the first diode, negative electrode connects described feedback valve, the two ends of the coil of described the 3rd relay are connected with common port with the anode of described the first diode respectively, the switch of described the 3rd relay is connected in series between the switch and described transfer valve of described the second relay.
7. chassis of fire engine anti-tilting apparatus according to claim 6, it is characterized in that, also comprise safety switch and the second diode, the anode of described the second diode is connected with the pin of described PLC controller output skewed control signal, negative electrode is connected with the coil of described the first relay, and described safety switch is connected in series between DC power supply terminal and the negative electrode of described the second diode.
8. chassis of fire engine anti-tilting apparatus according to claim 7, is characterized in that, described safety switch is automatic reset switch.
9. chassis of fire engine anti-tilting apparatus according to claim 1, is characterized in that, described obliquity sensor is double-shaft tilt angle sensor.
10. the anti-tipping method of chassis of fire engine based on the arbitrary described chassis of fire engine anti-tilting apparatus of claim 2～8, is characterized in that, comprising:
PLC controller receives the current angle of inclination of the chassis of fire engine of obliquity sensor input, and described current angle of inclination and default angle of inclination value are compared, if surpass described default angle of inclination value, to the action of getting off, suppress the first relay output skewed control signal of mechanism, the first relay and the second relay that the described action of getting off suppresses mechanism make for switching the transfer valve of the oil circuit of getting on or off the bus, to connect electricity on fire extinguishing tanker according to described skewed control signal, make on fire extinguishing tanker for setting up the feedback valve power-off of driving pressure getting off, otherwise not to described the first relay output skewed control signal, described the first relay and the second relay make described transfer valve power-off, described feedback valve connects electricity.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842967A (en) * | 2014-04-16 | 2015-08-19 | 北汽福田汽车股份有限公司 | Anti-rollover device for vehicles, and vehicle |
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| CN203946056U (en) * | 2013-12-05 | 2014-11-19 | 徐州重型机械有限公司 | Chassis of fire engine anti-tilting apparatus |
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2013
- 2013-12-05 CN CN201310655075.9A patent/CN103640542B/en active Active
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|---|---|---|---|---|
| US3804435A (en) * | 1971-09-15 | 1974-04-16 | Caterpillar Tractor Co | Vehicle roll-over safety apparatus |
| CN102400966A (en) * | 2011-09-29 | 2012-04-04 | 徐州重型机械有限公司 | Loading and unloading switching device and oil supply system and engineering machinery applying same |
| CN102501789A (en) * | 2011-11-10 | 2012-06-20 | 重庆润江机械制造有限公司 | Automatic anti-tilting control system for automotive hydraulic lifting |
| CN203946056U (en) * | 2013-12-05 | 2014-11-19 | 徐州重型机械有限公司 | Chassis of fire engine anti-tilting apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842967A (en) * | 2014-04-16 | 2015-08-19 | 北汽福田汽车股份有限公司 | Anti-rollover device for vehicles, and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103640542B (en) | 2016-02-24 |
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Effective date of registration: 20170216 Address after: 221004 Jiangsu Province, Xuzhou City Yunlong District No. 165 Patentee after: Xugong fire safety equipment Co. Ltd. Address before: 221004 Xuzhou, Zhejiang Province, Jiangsu Road No. 165 Patentee before: Xuzhou Heavy Machinery Co., Ltd. |