CN103990242B - Fire engine and protection device and system for preventing misoperation of ladder rack of fire engine - Google Patents
Fire engine and protection device and system for preventing misoperation of ladder rack of fire engine Download PDFInfo
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- CN103990242B CN103990242B CN201410246648.7A CN201410246648A CN103990242B CN 103990242 B CN103990242 B CN 103990242B CN 201410246648 A CN201410246648 A CN 201410246648A CN 103990242 B CN103990242 B CN 103990242B
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- valve
- relay
- ladder
- protection device
- hydraulic valve
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- 239000003921 oil Substances 0.000 claims abstract description 33
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Ladders (AREA)
Abstract
The invention discloses a fire fighting truck and a protection device and a system for preventing false operation of a ladder frame of the fire fighting truck. Wherein, the fire engine includes a hydraulic valve for controlling the flow and direction of the pressure oil to control the operation of the ladder frame, a main valve, and an on-off switching valve for controlling the main valve to switch the pressure oil delivery direction, and the protection device includes: the first actuating mechanism is connected with the hydraulic valve for controlling the action of the ladder frame; the second actuating mechanism is connected with the first actuating mechanism; when the hydraulic valve is in fault, the first executing mechanism controls the second executing mechanism to act, so that the on-off switching valve does not work, the hydraulic oil supply of the hydraulic valve is cut off, the misoperation of the ladder frame is avoided, and the potential safety hazard is eliminated.
Description
Technical field
The present invention relates to fire fighting truck field, in particular it relates to a kind of fire fighting truck and prevent the protection of its ladder misoperation from filling
Put and system.
Background technology
In fire fighting truck, the luffing (i.e. ladder is raised and lowered) of ladder is to produce pressure oil by hydraulic system to make luffing
Oil cylinder stretches out or retracts, and amplitude oil cylinder is stretched out or the change of retracted orientation is to change direction by hydraulic valve, and these hydraulic pressure
The change in valve direction, then be to be realized by electrical system.
Fig. 1 is the ladder luffing hydraulic schematic diagram of fire fighting truck.Wherein, main oil pump 8 draw oil from hydraulic oil container 9,
Produce pressure oil, pressure oil produces hydraulic power through reversal valve 6 of getting on or off the bus to main valve 5, so that main valve 5 can be commutated, pressure
Oil as needed can be to discharge pressure oil of getting off it is also possible to discharge pressure oil of getting on the bus, transport to the pressure got on the bus after main valve 5
Power oil reaches after center steering 4 gets on the bus, then the proportioning valve 3 through getting on the bus, and pressure oil is transported to amplitude oil cylinder, makes luffing oil
Cylinder stretches out or retracts, thus realizing the luffing of ladder.Wherein, ladder is hinged on the piston rod of amplitude oil cylinder 1, by luffing oil
The luffing stretching out or retracting drive ladder of cylinder 1.Center steering 4 is electrically to get on and off the passage of conveying with hydraulic pressure.Main valve 5
Be get on the bus, pressure oil of getting off conveying conversion direction valve.Switching valve 6 of getting on or off the bus is control bound 5 switching to pressure oil conveying direction
Reversal valve, thus realize pressure oil get on the bus, the conversion of conveying of getting off.When stepping on the floor push on console, get on or off the bus
Switching valve 6 is in the state of discharge pressure oil of getting on the bus.
In existing electrical system control method, only only account for the realization of normal function, without in view of hydraulic valve
The situation of fault (as hydraulic valve core is stuck), does not have safety precautions to the situation of hydraulic valve fault.And work as hydraulic valve core
When the phenomenon such as stuck occurs, it is likely to result in the misoperation of luffing, leads to vehicle damage or personnel casualty accidentses.
With regard to controlling the partial electric schematic diagram of the proportioning valve of ladder luffing in prior art for example shown in Fig. 2.As Fig. 2
Shown, controlling proportioning valve 3 using the electric control operation handle s1 on console, thus changing the direction of proportioning valve 3, realizing ladder
Luffing.
When stepping on the floor push s2 being installed on console, switching valve 6 of getting on or off the bus is in the state of getting on the bus.So, when
During hydraulic system normal work, step on floor push s2, switching valve 6 of getting on or off the bus is at the state of getting on the bus, then pass through operation electricity
Control operation handle s1 to realize rising or falling of ladder luffing.
However, when the spool jam of proportioning valve 3, proportioning valve 3 is likely to be at ladder luffing and rises or falls state, when opening
During hydrodynamic pressure system, as long as stepping on floor push s2, regardless of whether operating electric control handle s1, ladder all can rise or fall.When
When this thing happens, the rising or falling of ladder is likely to break vehicle or other object, particularly on ladder or working bucket
On have during personnel it is likely that there is security incident.
Content of the invention
It is an object of the invention to provide a kind of protection device preventing fire fighting truck ladder misoperation, system and fire fighting truck, should
Device is when the hydraulic valve controlling ladder breaks down, it is to avoid ladder misoperation, thus eliminating safe hidden trouble.
To achieve these goals, the present invention provides a kind of protection device preventing fire fighting truck ladder misoperation, described disappears
Flow that anti-car comprises control pressure oil and flow direction are controlling the hydraulic valve of described ladder action, main valve and to control this main valve to turn
Change the switching valve of getting on or off the bus of pressure oil conveying direction, this protection device includes: the first executing agency, with the described ladder action of control
Described hydraulic valve connect；And second executing agency, wherein, in described hydraulic valve fault, the control of described first executing agency
Make the action of described second executing agency, so that described switching valve of getting on or off the bus does not work, the hydraulic oil cutting off described hydraulic valve supplies
Should.
The present invention also provides a kind of protection system preventing fire fighting truck ladder misoperation, and described protection system includes: at least
One hydraulic valve, the flow of control pressure oil to control described ladder action with flow direction；And it is upper corresponding to each hydraulic valve
State protection device.
Additionally, the present invention also provides a kind of fire fighting truck, described fire fighting truck includes above-mentioned protection system.
The present invention in hydraulic valve fault, by the second executing agency action described in the first actuating mechanism controls so that
Switching valve of getting on or off the bus does not work, the hydraulic oil supply of cut-out hydraulic valve.So as to break down in the hydraulic valve controlling ladder
When, it is to avoid ladder misoperation.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of specification, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the ladder luffing hydraulic schematic diagram of fire fighting truck；
Fig. 2 is with regard to controlling the partial electric schematic diagram of the proportioning valve of ladder luffing in prior art；
Fig. 3 is the protection system preventing fire fighting truck ladder misoperation according to the present invention；And
Fig. 4 is the electrical principle of the protection device preventing fire fighting truck ladder misoperation according to one embodiment of the present invention
Figure.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Fig. 3 is the protection system preventing fire fighting truck ladder misoperation according to the present invention.As shown in figure 3, described protection system
System can include hydraulic valve 3, and flow and flow direction for control pressure oil to control the action of fire fighting truck ladder；And correspond to
The protection device 100 of hydraulic valve 3.Wherein, according to actual conditions, described protection system can include at least one hydraulic valve 3, liquid
Pressure valve 3 can be proportioning valve, and can include luffing proportioning valve, scaling valve and/or revolution proportioning valve, for controlling ladder
The luffing of frame, flexible and/or revolution.
And, Fig. 3 also show the protection device 100 preventing fire fighting truck ladder misoperation of present invention offer.Fire fighting truck
The flow that comprises control pressure oil and flow direction are controlling the hydraulic valve 3 of described ladder action, main valve and to control this main valve to change
The switching valve 6 of getting on or off the bus of pressure oil conveying direction, described protection device 100 can include the first executing agency 110, disappear with control
The hydraulic valve 3 of anti-car ladder action connects；And second executing agency 120；Wherein, in hydraulic valve 3 fault, the first execution machine
Structure 110 controls the second executing agency 120 action, so that switching valve 6 of getting on or off the bus does not work, the hydraulic oil of cut-out hydraulic valve 3 supplies
Should.
To illustrate the present invention below with reference to Fig. 4 by specific embodiment, it is noted that the present invention is simultaneously
It is not restricted to this.
Fig. 4 is the electrical principle of the protection device preventing fire fighting truck ladder misoperation according to one embodiment of the present invention
Figure.In this embodiment, the first executing agency and the second executing agency can be respectively the first relay k1 and the second relay
Device k2.The control end of the first relay k1 is connected with hydraulic valve 3, and its normally-closed contact 12 and 19 connects to the second relay k2's
Control end, for example, can be connected to the control end of the second relay k2 by the electric slip ring of center steering；And second continue
The normally-closed contact 12 and 19 of electrical equipment k2 connects in the loop of switching valve 6 of getting on or off the bus, for example, be connected to lower vehicle controller with up and down
Between car switching valve 6.The electrical module of wherein proportioning valve 3 has valve core reset detection function, when its valve element does not reset, it
A kind of electric signal can be produced.
As shown in figure 4, using 24 volts of Current Voltage in this control circuit, can be by the fault detection signal of proportioning valve 3
(valve element does not reset), is introduced to the first relay k1.
When hydraulic system normal work, that is, proportioning valve 3 is not detected by fault-signal, now, the output termination of proportioning valve 3
The output voltage of point 13 is 0 volt.Then the voltage difference at the first relay k1 two ends is 24 volts, the first relay k1 normal work, this
When the first relay k1 normally-closed contact 12 and 19 be off.So, the second relay k2 is in power failure state, such as
This, the normally-closed contact 22 and 29 of the second relay k2 is in the conduction state.Now, when stepping on floor push s2, conversion of getting on or off the bus
Valve 6 can normal work, operate electric control operation handle s1, by upper vehicle controller and lower vehicle controller, hydraulic pressure system can be controlled
System, thus realize the luffing of ladder.
When hydraulic work system, the spool jam of proportioning valve 3 does not reset, and the first relay k1 detects fault-signal,
Now, the output voltage of the output tip node 13 of proportioning valve 3 is 24 volts.The voltage difference at the so first relay k1 two ends is 0 volt,
First relay k1 is in power failure state and can not work, then the normally-closed contact 12 and 19 of the first relay k1 is on shape
State so that the second relay k2 obtain electric.Now, it is connected on the normally closed of the second relay k2 getting on or off the bus in switching valve 6 to touch
Point 22 and 29 disconnection, switching valve 6 dead electricity of so getting on or off the bus and can not work.Due to getting on or off the bus, switching valve 6 can not work, then main valve
5 nor in running order, such pressure oil cannot reach and get on the bus, even if stepping on floor push s2 and manipulating electric control operation
Handle s1, ladder is also impossible to luffing, thus serving the effect of safeguard protection.
The present invention also provides a kind of fire fighting truck, and this fire fighting truck includes above-mentioned protection system.
It is described above protection device based on the luffing proportioning valve controlling ladder luffing it should be understood that above-mentioned
Electic protection is away from the revolution proportioning valve that may be equally applicable for the flexible scaling valve of control ladder and control ladder to turn round.
It is in succinct purpose, will not be described here.
The fault-signal of proportion of utilization valve of the present invention, cuts off the pressure oil circuit of hydraulic system by electrical system, thus
Realize the safeguard protection of ladder action, then ensure the safety of vehicle and personnel.
Describe the preferred embodiment of the present invention above in association with accompanying drawing in detail, but, the present invention is not limited to above-mentioned reality
Apply the detail in mode, in the range of the technology design of the present invention, multiple letters can be carried out to technical scheme
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can
The combination of energy no longer separately illustrates.
Additionally, can also be combined between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it equally should be considered as content disclosed in this invention.
Claims (7)
1. a kind of protection device preventing fire fighting truck ladder misoperation, described fire fighting truck comprises flow and the flow direction of control pressure oil
To control hydraulic valve, main valve and the conversion of getting on or off the bus controlling this main valve switching to pressure oil conveying direction of described ladder action
Valve is it is characterised in that this protection device includes:
First executing agency, is connected with the described hydraulic valve controlling described ladder action；And
Second executing agency,
Wherein, in described hydraulic valve fault, the second executing agency action described in described first actuating mechanism controls, so that institute
State switching valve of getting on or off the bus not work, cut off the hydraulic oil supply of described hydraulic valve.
2. protection device according to claim 1 is it is characterised in that first and second executing agency described is respectively first
And second relay,
The control end of described first relay is connected with described hydraulic valve, and normally-closed contact connects to the control of described second relay
End；And
The normally-closed contact of described second relay be connected to lower vehicle controller and described get on or off the bus between switching valve,
Wherein in described hydraulic valve fault, the normally-closed contact conducting of described first relay, control described second relay
Normally-closed contact disconnects, so that described switching valve of getting on or off the bus does not work.
3. protection device according to claim 2 is it is characterised in that the normally-closed contact of described first relay is by described
The electric slip ring of the center steering of fire fighting truck is connected with the control end of described second relay.
4. protection device according to claim 3 is it is characterised in that when described hydraulic valve fault, described first relay
Device two ends no pressure reduction.
5. the protection device according to any one of claim 1-4 claim is it is characterised in that described hydraulic valve is ratio
Example valve, and include luffing proportioning valve, scaling valve and/or revolution proportioning valve.
6. a kind of protection system preventing fire fighting truck ladder misoperation is it is characterised in that described protection system includes:
At least one hydraulic valve, the flow of control pressure oil to control described ladder action with flow direction；And
Corresponding to protection device as described in any one of claim 1-5 claim for each hydraulic valve.
7. a kind of fire fighting truck is it is characterised in that described fire fighting truck includes the protection system described in claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410246648.7A CN103990242B (en) | 2014-06-05 | 2014-06-05 | Fire engine and protection device and system for preventing misoperation of ladder rack of fire engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410246648.7A CN103990242B (en) | 2014-06-05 | 2014-06-05 | Fire engine and protection device and system for preventing misoperation of ladder rack of fire engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103990242A CN103990242A (en) | 2014-08-20 |
| CN103990242B true CN103990242B (en) | 2017-01-18 |
Family
ID=51304731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410246648.7A Active CN103990242B (en) | 2014-06-05 | 2014-06-05 | Fire engine and protection device and system for preventing misoperation of ladder rack of fire engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103990242B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2113792U (en) * | 1992-02-11 | 1992-08-26 | 李耀诚 | Automatic aerial fire and rescue vehicle |
| CN102030293A (en) * | 2010-12-10 | 2011-04-27 | 徐州重型机械有限公司 | Elevated operation vehicle and platform leveling hydraulic system thereof |
| CN102425582A (en) * | 2011-12-27 | 2012-04-25 | 徐州重型机械有限公司 | Hydraulic control valve and getting-off support leg control system of firefighting vehicle with hydraulic control valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202560698U (en) * | 2012-05-22 | 2012-11-28 | 中联重科股份有限公司渭南分公司 | Hydraulic system protection equipment, hydraulic system and engineering mechanical equipment |
| CN103276933A (en) * | 2013-06-30 | 2013-09-04 | 梁崇彦 | Rising low voltage protection device of car carrying plate of hydraulic type parking equipment |
-
2014
- 2014-06-05 CN CN201410246648.7A patent/CN103990242B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2113792U (en) * | 1992-02-11 | 1992-08-26 | 李耀诚 | Automatic aerial fire and rescue vehicle |
| CN102030293A (en) * | 2010-12-10 | 2011-04-27 | 徐州重型机械有限公司 | Elevated operation vehicle and platform leveling hydraulic system thereof |
| CN102425582A (en) * | 2011-12-27 | 2012-04-25 | 徐州重型机械有限公司 | Hydraulic control valve and getting-off support leg control system of firefighting vehicle with hydraulic control valve |
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| Publication number | Publication date |
|---|---|
| CN103990242A (en) | 2014-08-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CP03 | Change of name, title or address |
Address after: 410200 No. 997, Section 2, Tengfei Road, Wangcheng District, Changsha City, Hunan Province Patentee after: Hunan Zoomlion emergency equipment Co.,Ltd. Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: No.997 Jinxing Road, Wangcheng District, Changsha City, Hunan Province Patentee before: Changsha Zhonglian Fire-Fighting Machinery Co.,Ltd. Patentee before: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |