CN206126738U - Hoist brake control valve and hook and ladder - Google Patents
Hoist brake control valve and hook and ladder Download PDFInfo
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- CN206126738U CN206126738U CN201620969710.XU CN201620969710U CN206126738U CN 206126738 U CN206126738 U CN 206126738U CN 201620969710 U CN201620969710 U CN 201620969710U CN 206126738 U CN206126738 U CN 206126738U
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- pressure
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- hoist
- control valve
- hydraulic
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Abstract
The utility model relates to a hoist brake control valve and hook and ladder, the hoist brake control valve includes: the load pressure acquires mechanism and relief pressure valve (3), the import of relief pressure valve (3) with the load pressure acquires the delivery outlet intercommunication of mechanism, the export of relief pressure valve (3) with the hoist stopper is operationally connected between (1), so that the load pressure acquires the hydraulic fluid process of mechanism's output be supplied to after relief pressure valve (3) decompression hoist stopper (1). The utility model discloses an it reduces pressure to the hydraulic fluid that comes from the load pressure to set up the relief pressure valve to offer the hoist stopper and realize making the cracking pressure of hoist stopper can not receive load changes's influence by the stable cracking pressure of hoist stopper, thereby ensure the stability of opening of hoist stopper.
Description
Technical field
The utility model is related to field of work machines, more particularly to a kind of elevator brake control valve and hook and ladder.
Background technology
The boom frame telescopic of hook and ladder is driven using hoisting mechanism, drives more piece aerial ladder same by steel wire rope and pulley mechanism
Step is extended and retracted.Wherein, elevator is typically made up of hydraulic motor, reductor, reel and steel wire rope, is subtracted by fluid motor-driven
Fast machine rotation, reductor band movable reel rotates, when reel rotates can folding and unfolding be wrapped in steel wire rope on reel, so as to pull steel wire
The load raising of the rope other end or whereabouts.Reductor is built-in with brake, and the mode of braking of the brake is by reductor
Multi-disc type friction plate locking reducer gear in the presence of spring compression, falls when preventing from standing.
For existing hook and ladder, when ladder stretches out, hydraulic oil opens reducer brake, while driving
Hydraulic motor rotates, and drives elevator to overcome ladder and workbench gravity load, stretches out ladder.When ladder bounces back, hydraulic pressure
Oil opens reducer brake, while hydraulic motor rotation is driven, because motor load side is equipped with balanced valve, although so elevator
In the case where brake is opened, band carries retraction, and the hydraulic oil of its retraction cavity steadily flows out under the restriction of balanced valve, so that
Elevator will not stall in retraction.Balanced valve plays dynamic balancing effect during elevator retracting motion.When ladder stopping action
When, hydraulic oil pressure release, brake is closed, and brakes elevator.Prevent ladder from falling after rise under gravity.
When braking due to elevator, the timely off-load of hydraulic oil is needed, just can ensure that reducer brake is in on-position.Cloud
Terraced fire fighting truck, once off-load passes through compensation, or unloading control failure, may result in elevator when frequently using with rescue work
Cannot brake.At this moment ladder will fall under gravity in stall, cause security incident.
As shown in figure 1, for the hydraulic principle schematic diagram of existing hook and ladder.When carrying out being capable of the flexible dynamic of ladder
When making, V1 (or V2) mouth enters hydraulic oil, is rotated by C1 (or C2) mouths drive motor, at the same the pressure oil by shuttle valve a3 and
One-way throttle valve a4 enters reducer brake a1, opens brake a1, hoist motor a2 rotations.When action stops, V1 (or
V2) mouth hydraulic oil off-load, the pressure oil in reductor is back to V1 (or V2) mouth off-load by one-way throttle valve a4 and shuttle valve a3.
It can be seen from the principle of Fig. 1, existing control program brake fluid force feed passes through shuttle valve draining.Its shortcoming is mainly showed
：
1st, hydraulic oil is opened when brake a1 is worked by V1 (or V2) mouth, and the pressure can fluctuate with load change, affect
Brake opens stability.
If the 2, there is clamping stagnation or clogging in one-way throttle valve a4, can cause brake a1 hydraulic oil cannot off-load,
And then lead to not brake；
3rd, when V1 (or V2) mouth return oil pressure is higher, the pressure can open brake a1 by shuttle valve a3.
Utility model content
The purpose of this utility model is to propose a kind of elevator brake control valve and hook and ladder, can realize stable system
Dynamic Opening pressure.
For achieving the above object, the utility model provides a kind of elevator brake control valve, including：Load pressure obtains machine
Structure and pressure-reducing valve, the import of the pressure-reducing valve and the load pressure obtain the delivery outlet of mechanism and connect, and the pressure-reducing valve goes out
Mouth is operably connected between the hoist brake, so that the hydraulic fluid that the load pressure obtains mechanism's output is passed through
The hoist brake is supplied to after the pressure-reducing valve decompression.
Further, it is additionally provided with choke valve between the outlet of the pressure-reducing valve and the hoist brake.
Further, also including unloader, the unloader is arranged between earial drainage stream and the hoist brake
In first hydraulic flow path, can selectively close first hydraulic flow path or guide the hoist brake by described the
One hydraulic flow path off-load.
Further, also including pilot operated directional control valve, hydraulic control mouth and the load pressure of the pilot operated directional control valve obtain machine
The delivery outlet connection of structure, the pilot operated directional control valve is arranged on the second hydraulic pressure between the pressure-reducing valve and the hoist brake
On stream, the load pressure signal that can obtain mechanism's output according to the load pressure selectively closes second hydraulic pressure
Stream or the hydraulic fluid being directed through after the pressure-reducing valve decompression are supplied to the elevator system by second hydraulic flow path
Dynamic device.
Further, the pilot operated directional control valve can also guide the hoist brake off-load in close stance.
Further, the unloader is the reversal valve of electromagnetic form or hydraulic control form, can be when elevator action stops
First hydraulic flow path is opened, so that the hoist brake is by the first hydraulic flow path off-load；And in elevator action
First hydraulic flow path is closed when carrying out.
Further, the load pressure obtains mechanism includes pressure selecting device, the input of the pressure selecting device
Mouth is connected respectively with each bar workload hydraulic flow path of hoist motor, in can selecting each bar workload hydraulic flow path
The corresponding hydraulic fluid of maximum load pressure is exported by delivery outlet.
Further, the pressure selecting device is shuttle valve or shuttle valve network.
Further, the spring cavity of the pressure-reducing valve and the pilot operated directional control valve with the earial drainage fluid communication.
For achieving the above object, the utility model provides a kind of hook and ladder, including workbench, ladder and control
The flexible hoist motor of the ladder, wherein also including aforesaid elevator brake control valve.
Based on above-mentioned technical proposal, the utility model is entered by arranging pressure-reducing valve to the hydraulic fluid for coming from load pressure
Row decompression, and it is supplied to hoist brake to realize the stable Opening pressure of hoist brake, make the unlatching of hoist brake
Pressure will not be affected by load change, so that it is guaranteed that the unlatching stability of hoist brake.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not constitute to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is the hydraulic principle schematic diagram of existing hook and ladder.
Fig. 2 is that the hydraulic principle of the hook and ladder for applying the utility model elevator brake control valve embodiment is illustrated
Figure.
Specific embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Fig. 2 the hydraulic pressure of the hook and ladder to apply the utility model elevator brake control valve embodiment is former
Reason schematic diagram.In this elevator brake control valve embodiment, elevator brake control valve includes：Load pressure obtains mechanism and decompression
Valve 3, the import of the pressure-reducing valve 3 and the load pressure obtain the delivery outlet of mechanism and connect, the outlet of the pressure-reducing valve 3 and institute
State and be operably connected between hoist brake 1, so that the load pressure obtains the hydraulic fluid of mechanism's output through described
Pressure-reducing valve 3 is supplied to the hoist brake 1 after reducing pressure.
The present embodiment is entered by arranging pressure-reducing valve in elevator brake control valve to the hydraulic fluid for coming from load pressure
Row decompression, and it is supplied to hoist brake to realize the stable Opening pressure of hoist brake, make the unlatching of hoist brake
Pressure will not be affected by load change, so that it is guaranteed that the unlatching stability of hoist brake.Here hydraulic fluid can be with
Including any fluid that can realize hydraulic action, such as hydraulic oil etc..
In the present embodiment, load pressure obtain mechanism can include pressure selecting device, the pressure selecting device it is defeated
Entrance respectively with each bar workload hydraulic flow path V1 of hoist motor 2, V2 connection, each bar workload hydraulic pressure can be selected
Stream V1, the corresponding hydraulic fluid of maximum load pressure in V2 is exported by delivery outlet.Pressure selecting device it is concrete
Form can be shuttle valve 7 or shuttle valve network.It can also be the energy for transmitting otherwise or perceiving that load pressure obtains mechanism
Enough characterize the acquisition device of the signal of load pressure.Pressure selecting device can be selected most from each workload hydraulic flow path
Heavy load pressure, and shuttle valve and shuttle valve network are conventional hydraulic device, it is easy to obtain and convenient and practical.For two workloads
The situation of hydraulic flow path preferably adopts shuttle valve, and the workload hydraulic flow path for more than three, it is preferred to use by multiple shuttles
Valve group into shuttle valve network realizing the selection of maximum pressure signal.
Additionally, in the hydraulic system shown in Fig. 2, the work stream of two working chambers of hydraulic motor 2 is provided with balance
Valve, to guarantee that hydraulic fluid can reduce flow velocity and flow under the restriction of balanced valve during 2 run with load of hydraulic motor.And bear
Carry pressure acquisition mechanism to be preferably provided on the outside of balanced valve work stream, i.e., away from the side of hydraulic motor 2, to stop
Will not make the elevator brake valve 1 cannot normal switching-off during machine because the pressure after hydraulic motor 2 is with load is higher.
In fig. 2, choke valve 6, the throttling can also be further set between the outlet of pressure-reducing valve 3 and hoist brake 1
Valve 6 can further eliminate the fluctuation from load pressure so that the hydraulic fluid after step-down can pressure smoothly supply
Hoist brake 1 should be given.
When clamping stagnation or blocking occurs in the one-way throttle valve for being previously noted existing hydraulic system employing, can cause the brake cannot
Off-load, and then braking action cannot be realized.In order to overcome this problem, in another embodiment of the present utility model, front
Unloader 5 is also further increased in the embodiment stated, the unloader 5 be arranged on earial drainage stream L and the hoist brake 1 it
Between the first hydraulic flow path in, can selectively close the first hydraulic flow path or guiding hoist brake 1 pass through described first
Hydraulic flow path off-load.When the unloader 5 is closed, load pressure obtains the hydraulic fluid of mechanism's output can be through the decompression
Valve 3 is supplied to hoist brake 1 after reducing pressure, and when the unloader 5 is opened, the stream between hoist brake 1 and earial drainage stream L
Road is unimpeded, defines the unloading channel of hoist brake 1, even if now there is blocking or clamping stagnation in other devices, also will not be to volume
The off-load for raising brake 1 is impacted, and ensures that the braking action of hoist brake 1.
Implementing in form in unloader 5, can both adopt electromagnetic form, it would however also be possible to employ the commutation of hydraulic control form
Valve.With reference to concrete operating mode, the unloader 5 can open first hydraulic flow path when elevator action stops, so that the elevator
Brake 1 this makes it possible to realize good braking action by the first hydraulic flow path off-load；And unload when elevator action is carried out
Lotus valve 5 can close first hydraulic flow path, to make hoist brake 1 normally-open.Further, since the unlatching of unloader 5,
Even if so that the pressure that load pressure obtains mechanism is now higher, also only can be rolled up without opening by the off-load in the lump of unloader 5
Brake 1 is raised, it is ensured that the security of hoisting system.
In fig. 2, elevator brake control valve can further include pilot operated directional control valve 4, the liquid of the pilot operated directional control valve 4
Control mouth and the load pressure obtain the delivery outlet of mechanism and connect, and the pilot operated directional control valve 4 is arranged on the pressure-reducing valve 3 and described
On the second hydraulic flow path between hoist brake 1, the load pressure letter of mechanism's output can be obtained according to the load pressure
Number selectively close second hydraulic flow path or be directed through the hydraulic fluid after the pressure-reducing valve 3 reduces pressure by described
Second hydraulic flow path is supplied to the hoist brake 1.When load pressure signal is higher, by promoting pilot operated directional control valve 4
The opening of valve core movement to pilot operated directional control valve 4 so that the hydraulic fluid after the pressure-reducing valve 3 reduces pressure is by described the
Two hydraulic flow paths are supplied to the hoist brake 1；And when load pressure signal is relatively low, then cannot promote pilot operated directional control valve 4
Valve core movement to pilot operated directional control valve 4 opening, now hydraulicdirectional control valve 4 close pressure-reducing valve 3 to hoist brake 1 it
Between hydraulic flow path.
Further, can arrange in the close stance of pilot operated directional control valve 4 can guide in the off-load of the hoist brake 1
Portion's stream, this makes it possible to realize double unloading channels of hoist brake 1, it is ensured that the energy of hoist brake 1 when hoist motor 2 stops
Enough safe relief brakes.
In order to ensure the normal operation of pressure-reducing valve 3 and pilot operated directional control valve 4, pressure-reducing valve 3 and the pilot operated directional control valve 4 can be made
Spring cavity connect with the earial drainage stream L, by earial drainage stream L earial drainages while can reducing pressure so as to pressure-reducing valve 3, and
The pressure for guaranteeing the spring cavity of pilot operated directional control valve 4 is unlikely to too high.
Above-mentioned elevator brake control valve can be applicable to all kinds of engineering mechanical devices or vehicle for needing to carry out rolling control.This
Invention provides a kind of hook and ladder, including workbench, ladder, controls the flexible hoist motor 2 of the ladder and aforementioned
Elevator brake control valve.Further illustrate each operating mode with the hydraulic system example of the hook and ladder shown in Fig. 2 below
The control process of lower hydraulic system.
When needing the control ladder of hoist motor 2 to make expanding-contracting action, now V1 mouths or V2 mouths enter pressure oil, flow through balance
After valve by C1 mouths or C2 mouths into hydraulic motor 2 driving hydraulic motor 2 to rotate.The pressure oil is by after shuttle valve 7, opening liquid
Control reversal valve 4.The reversal valve 5 for controlling electromagnetic form simultaneously is powered, and the pressure oil is opened through pressure-reducing valve 3 and pilot operated directional control valve 4
Qi Weihou, by C3 mouths hoist brake 1 is entered, and makes hoist brake 1 release the braking action to hoist motor 2, elevator horse
Up to 2 rotations.
When needing hoist motor 2 to stop expanding-contracting action, the now hydraulic oil off-load of V1 mouths or V2 mouths, pilot operated directional control valve 4
Close, while the power-off of reversal valve 5 of electromagnetic form is controlled, the closing that the pressure oil in hoist brake 1 passes through pilot operated directional control valve 4
The power down bit of the reversal valve 5 of position and electromagnetic form carries out binary channels off-load.
Finally it should be noted that:Above example is only to illustrate the technical solution of the utility model rather than it is limited
System；Although being described in detail to the utility model with reference to preferred embodiment, those of ordinary skill in the art should
Understand：Still specific embodiment of the present utility model can be modified or equivalent is carried out to some technical characteristics and be replaced
Change；Without deviating from the spirit of technical solutions of the utility model, it all should cover the technical scheme being claimed in the utility model
In the middle of scope.
Claims (10)
1. a kind of elevator brake control valve, it is characterised in that include：Load pressure obtains mechanism and pressure-reducing valve (3), the decompression
The import of valve (3) and the load pressure obtain the delivery outlet of mechanism and connect, the outlet of the pressure-reducing valve (3) and hoist brake
(1) it is operably connected between, so that the hydraulic fluid that the load pressure obtains mechanism's output subtracts through the pressure-reducing valve (3)
The hoist brake (1) is supplied to after pressure.
2. elevator brake control valve according to claim 1, it is characterised in that the outlet and institute in the pressure-reducing valve (3)
State and choke valve (6) is additionally provided between hoist brake (1).
3. elevator brake control valve according to claim 1, it is characterised in that also including unloader (5), the unloader
(5) it is arranged in the first hydraulic flow path between earial drainage stream (L) and the hoist brake (1), can selectively closes
First hydraulic flow path guides the hoist brake (1) by the first hydraulic flow path off-load.
4. elevator brake control valve according to claim 3, it is characterised in that also including pilot operated directional control valve (4), the liquid
The delivery outlet that the hydraulic control mouth of control reversal valve (4) obtains mechanism with the load pressure is connected, and the pilot operated directional control valve (4) is arranged on
On the second hydraulic flow path between the pressure-reducing valve (3) and the hoist brake (1), can be obtained according to the load pressure
The load pressure signal of mechanism's output is selectively closed second hydraulic flow path or is directed through the pressure-reducing valve (3) decompression
Hydraulic fluid afterwards is supplied to the hoist brake (1) by second hydraulic flow path.
5. elevator brake control valve according to claim 4, it is characterised in that the pilot operated directional control valve (4) is in close stance
The hoist brake (1) off-load can also be guided.
6. elevator brake control valve according to claim 3, it is characterised in that the unloader (5) for electromagnetic form or
The reversal valve of hydraulic control form, can open first hydraulic flow path, so that the hoist brake when elevator action stops
(1) by the first hydraulic flow path off-load；And close first hydraulic flow path when elevator action is carried out.
7. elevator brake control valve according to claim 1, it is characterised in that the load pressure obtains mechanism includes pressure
Power selecting device, the input port of the pressure selecting device respectively with each bar workload hydraulic flow path of hoist motor (2)
(V1, V2) is connected, and can select the corresponding hydraulic pressure of maximum load pressure in each bar workload hydraulic flow path (V1, V2)
Fluid is exported by delivery outlet.
8. elevator brake control valve according to claim 7, it is characterised in that the pressure selecting device is shuttle valve (7)
Or shuttle valve network.
9. elevator brake control valve according to claim 4, it is characterised in that the pressure-reducing valve (3) and the hydraulic control are changed
Connect with the earial drainage stream (L) to the spring cavity of valve (4).
10. the flexible hoist motor (2) of a kind of hook and ladder, including workbench, ladder and the control ladder, its feature
It is, also including the arbitrary described elevator brake control valve of claim 1～9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620969710.XU CN206126738U (en) | 2016-08-26 | 2016-08-26 | Hoist brake control valve and hook and ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620969710.XU CN206126738U (en) | 2016-08-26 | 2016-08-26 | Hoist brake control valve and hook and ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206126738U true CN206126738U (en) | 2017-04-26 |
Family
ID=58565154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620969710.XU Active CN206126738U (en) | 2016-08-26 | 2016-08-26 | Hoist brake control valve and hook and ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206126738U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106185681A (en) * | 2016-08-26 | 2016-12-07 | 徐工消防安全装备有限公司 | A kind of elevator brake control valve for hook and ladder |
-
2016
- 2016-08-26 CN CN201620969710.XU patent/CN206126738U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106185681A (en) * | 2016-08-26 | 2016-12-07 | 徐工消防安全装备有限公司 | A kind of elevator brake control valve for hook and ladder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180604 Address after: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Co-patentee after: Xugong fire safety equipment Co. Ltd. Patentee after: XCMG Construction Machinery Co., Ltd. Address before: 221004 Tongshan Road, Yunlong District, Xuzhou, Jiangsu Province, No. 165 Patentee before: Xugong fire safety equipment Co. Ltd. |