CN106185681A - A kind of elevator brake control valve for hook and ladder - Google Patents
A kind of elevator brake control valve for hook and ladder Download PDFInfo
- Publication number
- CN106185681A CN106185681A CN201610735232.0A CN201610735232A CN106185681A CN 106185681 A CN106185681 A CN 106185681A CN 201610735232 A CN201610735232 A CN 201610735232A CN 106185681 A CN106185681 A CN 106185681A
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- Prior art keywords
- valve
- control valve
- brake
- flow path
- hydraulic
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/26—Operating devices pneumatic or hydraulic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to a kind of elevator brake control valve for hook and ladder, including: load pressure obtains mechanism and air relief valve (3), the delivery outlet that the import of described air relief valve (3) obtains mechanism with described load pressure connects, it is operably connected between the outlet of described air relief valve (3) with described hoist brake (1), so that the hydraulic fluid that described load pressure obtains mechanism's output is supplied to described hoist brake (1) after described air relief valve (3) reduces pressure.The hydraulic fluid coming from load pressure is reduced pressure by the present invention by arranging air relief valve, and it is supplied to hoist brake to realize the stable unlatching pressure of hoist brake, the unlatching pressure making hoist brake will not be changed by load be affected, so that it is guaranteed that the unlatching stability of hoist brake.
Description
Technical field
The present invention relates to field of work machines, particularly relate to a kind of elevator brake control valve for hook and ladder.
Background technology
The boom frame telescopic of hook and ladder uses hoisting mechanism to drive, steel wire rope and pulley mechanism drive more piece aerial ladder same
Step extends and retracts.Wherein, elevator is typically made up of hydraulic motor, reductor, reel and steel wire rope, fluid motor-driven subtract
Speed machine rotates, and reductor band movable reel rotates, when reel rotates can the steel wire rope that is wrapped on reel of folding and unfolding, thus pull steel wire
The load of the rope other end hoists or falls.Reductor is built-in with brake, and the mode of braking of this brake is by reductor
Multi-disc type friction plate is locking reducer gear under the effect of spring compression, falls when preventing from standing.
For existing hook and ladder, when ladder stretches out, reducer brake opened by hydraulic oil, simultaneously drives
Hydraulic motor rotates, and drives elevator to overcome ladder and work platforms gravity load, makes ladder stretch out.When ladder bounces back, hydraulic pressure
Reducer brake opened by oil, simultaneously drives hydraulic motor and rotates, owing to motor load side is equipped with balanced valve, although so elevator
In the case of 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 when retraction.Balanced valve plays dynamic balancing effect during elevator retracting motion.When ladder stopping action
Time, hydraulic oil pressure release, brake is closed, is made elevator brake.Prevent ladder from falling after rise under gravity.
When braking due to elevator, need the timely off-load of hydraulic oil, just can ensure that reducer brake is in on-position.Cloud
Ladder fire fighting truck is when frequently using with rescue work, and once unloading channel is not smooth, or unloading control lost efficacy, and may result in elevator
Cannot brake.At this moment ladder will fall under gravity in stall, causes security incident.
As it is shown in figure 1, be the hydraulic principle schematic diagram of existing hook and ladder.When carrying out the expanding-contracting action of ladder,
V1 (or V2) mouth enters hydraulic oil, drives motor to rotate by C1 (or C2) mouth, and this pressure oil is by shuttle valve a3 and unidirectional simultaneously
Choke valve a4 enters reducer brake a1, opens brake a1, hoist motor a2 and rotates.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.
According to the principle of Fig. 1, existing control program brake fluid force feed passes through shuttle valve draining.Its shortcoming mainly shows
:
1, when brake a1 is worked by V1 (or V2) mouth, hydraulic oil is opened, and this pressure can fluctuate with load change, impact
Stability is opened in brake.
If 2, there is clamping stagnation or clogging in one-way throttle valve a4, then can cause brake a1 hydraulic oil cannot off-load,
And then cause braking；
3, the when that V1 (or V2) mouth return oil pressure being higher, this pressure can open brake a1 by shuttle valve a3.
Summary of the invention
The purpose of the present invention is to propose to a kind of elevator brake control valve and hook and ladder, it is possible to realize stable braking and open
Open pressure.
For achieving the above object, the invention provides a kind of elevator brake control valve, including: load pressure obtain mechanism and
Air relief valve, the import of described air relief valve and described load pressure obtain the delivery outlet of mechanism and connect, the outlet of described air relief valve and
It is operably connected between described hoist brake, so that described load pressure obtains the hydraulic fluid of mechanism's output through described
It is supplied to described hoist brake after air relief valve decompression.
Further, between the outlet and described hoist brake of described air relief valve, it is additionally provided with choke valve.
Further, also include that unloader, described unloader are arranged between earial drainage stream and described hoist brake
In first hydraulic flow path, it is possible to selectively close described first hydraulic flow path or guide described hoist brake by described the
One hydraulic flow path off-load.
Further, also including pilot operated directional control valve, the hydraulic control mouth of described pilot operated directional control valve obtains machine with described load pressure
The delivery outlet connection of structure, described pilot operated directional control valve is arranged on the second flow of pressurized between described air relief valve and described hoist brake
Lu Shang, it is possible to the load pressure signal obtaining mechanism's output according to described load pressure selectively closes described second flow of pressurized
Road or be directed through the post-decompression hydraulic fluid of described air relief valve and be supplied to described elevator to brake by described second hydraulic flow path
Device.
Further, described pilot operated directional control valve can also guide described hoist brake off-load at close stance.
Further, described unloader is electromagnetic form or the reversal valve of hydraulic control form, it is possible to when elevator action stops
Open described first hydraulic flow path, so that described hoist brake is by described first hydraulic flow path off-load；And in elevator action
Described first hydraulic flow path is closed when carrying out.
Further, described load pressure obtains mechanism and includes that pressure selects device, and described pressure selects the input of device
Mouth connects with each bar live load hydraulic flow path of hoist motor respectively, it is possible to select in each bar live load hydraulic flow path
The hydraulic fluid that maximum load pressure is corresponding is exported by delivery outlet.
Further, described pressure selects device to be shuttle valve or shuttle valve network.
Further, the spring cavity of described air relief valve and described pilot operated directional control valve all with described earial drainage fluid communication.
For achieving the above object, the invention provides a kind of hook and ladder, including described in work platforms, ladder and control
The hoist motor that ladder is flexible, the most also includes aforesaid elevator brake control valve.
Based on technique scheme, the hydraulic fluid coming from load pressure is subtracted by the present invention by arranging air relief valve
Pressure, and it is supplied to hoist brake to realize the stable unlatching pressure of hoist brake, make the unlatching pressure of hoist brake
Will not be changed by load and be affected, so that it is guaranteed that the unlatching stability of hoist brake.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the hydraulic principle schematic diagram of existing hook and ladder.
Fig. 2 is the hydraulic principle schematic diagram of the hook and ladder applying elevator brake control valve embodiment of the present invention.
Detailed description of the invention
Below by drawings and Examples, technical scheme is described in further detail.
As in figure 2 it is shown, the hydraulic principle of the hook and ladder for applying elevator brake control valve embodiment of the present invention shows
It is intended to.In this elevator brake control valve embodiment, elevator brake control valve includes: load pressure obtains mechanism and air relief valve 3,
The delivery outlet that the import of described air relief valve 3 obtains mechanism with described load pressure connects, the outlet of described air relief valve 3 and described volume
Raise and be operably connected between brake 1, so that described load pressure obtains the hydraulic fluid of mechanism's output through described decompression
It is supplied to described hoist brake 1 after valve 3 decompression.
The hydraulic fluid coming from load pressure is entered by the present embodiment by arranging air relief valve in elevator brake control valve
Row decompression, and it is supplied to hoist brake to realize the stable unlatching pressure of hoist brake, make the unlatching of hoist brake
Pressure will not be changed by load to be affected, so that it is guaranteed that the unlatching stability of hoist brake.Here hydraulic fluid is permissible
Including any fluid being capable of hydraulic action, such as hydraulic oil etc..
In the present embodiment, load pressure obtains mechanism can include that pressure selects device, and this pressure selects the defeated of device
Entrance connects with each bar live load hydraulic flow path V1, V2 of hoist motor 2 respectively, it is possible to select each bar live load hydraulic pressure
Stream V1, the hydraulic fluid that maximum load pressure in V2 is corresponding is exported by delivery outlet.Pressure selects the concrete of device
Form can be shuttle valve 7 or shuttle valve network.It can also be to transmit otherwise or the energy of perception that load pressure obtains mechanism
Enough characterize the acquisition device of the signal of load pressure.Pressure selects device can select from each live load 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 live loads
The situation of hydraulic flow path preferably employs shuttle valve, and for the live load hydraulic flow path of more than three, it is preferred to use by multiple shuttles
The shuttle valve network of valve composition realizes 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, during to guarantee hydraulic motor 2 run with load, hydraulic fluid can reduce flow velocity and flow under the restriction of balanced valve.And load
Pressure obtains mechanism and is preferably provided on the outside work stream of balanced valve, i.e. away from the side of hydraulic motor 2, in order to shutting down
Pressure after Shi Buhui carries because hydraulic motor 2 band is higher and make the elevator brake valve 1 cannot normal switching-off.
In fig. 2, between outlet and the hoist brake 1 of air relief valve 3, choke valve 6, this throttling can also be set further
Valve 6 can eliminate the fluctuation from load pressure further so that the hydraulic fluid after blood pressure lowering can supply by pressure smoothly
Hoist brake 1 should be given.
It is previously noted the one-way throttle valve that existing hydraulic system uses time clamping stagnation or blocking occur, 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 invention, aforesaid
Also further increasing unloader 5 in embodiment, this unloader 5 is arranged between earial drainage stream L and described hoist brake 1
In first hydraulic flow path, it is possible to selectively close the first hydraulic flow path or guide hoist brake 1 by described first hydraulic pressure
Stream off-load.When this unloader 5 cuts out, load pressure obtains the hydraulic fluid of mechanism's output can be through described air relief valve 3
Hoist brake 1 it is supplied to after decompression, and the runner when this unloader 5 is opened, between hoist brake 1 and earial drainage stream L
Unimpeded, define the unloading channel of hoist brake 1, even if now there is blocking or clamping stagnation in other devices, also will not be to elevator
The off-load of brake 1 impacts, and ensures that the braking action of hoist brake 1.
Implementing in form at unloader 5, both can use electromagnetic form, it would however also be possible to employ the commutation of hydraulic control form
Valve.In conjunction with concrete operating mode, this unloader 5 can open this first hydraulic flow path when elevator action stops, so that described elevator
Brake 1, by the first hydraulic flow path off-load, this makes it possible to realize good braking action；And unload when elevator action is carried out
Lotus valve 5 can cut out this first hydraulic flow path, in order to makes hoist brake 1 normally-open.Additionally, due to the unlatching of unloader 5,
Even if it is the highest to make load pressure obtain the pressure of mechanism, also only can pass through unloader 5 off-load in the lump, roll up without opening
Raise brake 1, it is ensured that the safety of hoisting system.
In fig. 2, elevator brake control valve can further include pilot operated directional control valve 4, the liquid of described pilot operated directional control valve 4
The delivery outlet of control mouth and described load pressure acquisition mechanism connects, and described pilot operated directional control valve 4 is arranged on described air relief valve 3 and described
On the second hydraulic flow path between hoist brake 1, it is possible to obtain the load pressure letter of mechanism's output according to described load pressure
Number described second hydraulic flow path of selectable closedown or be directed through the described post-decompression hydraulic fluid of air relief valve 3 by described the
Two hydraulic flow path are supplied to described hoist brake 1.When load pressure signal is higher, by promoting the valve of pilot operated directional control valve 4
Core moves to the opening of pilot operated directional control valve 4 so that through the described post-decompression hydraulic fluid of air relief valve 3 by described second
Hydraulic flow path is supplied to described hoist brake 1；And when load pressure signal is relatively low, then cannot promote pilot operated directional control valve 4
Valve core movement is to the opening of pilot operated directional control valve 4, and now hydraulicdirectional control valve 4 closes air relief valve 3 between hoist brake 1
Hydraulic flow path.
Further, can be in the close stance of pilot operated directional control valve 4 arranges and can guide the off-load of described hoist brake 1
Portion's stream, this makes it possible to realize double unloading channels of hoist brake 1, it is ensured that hoist brake 1 energy when hoist motor 2 stops
Enough safe relief brake.
Properly functioning in order to ensure air relief valve 3 and pilot operated directional control valve 4, can make air relief valve 3 and described pilot operated directional control valve 4
Spring cavity all connect with described earial drainage stream L, in order to air relief valve 3 can pass through earial drainage stream L earial drainage while reducing pressure, and
Guarantee that the pressure of 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 device or the vehicle needing to carry out rolling control.This
Invention provides a kind of hook and ladder, the hoist motor 2 flexible including work platforms, ladder, the described ladder of control and aforementioned
Elevator brake control valve.Each operating mode is further illustrated below with the hydraulic system example of the hook and ladder shown in Fig. 2
The control process of lower hydraulic system.
When needs hoist motor 2 control ladder make expanding-contracting action time, now V1 mouth or V2 mouth enter pressure oil, flow through balance
Entering hydraulic motor 2 by C1 mouth or C2 mouth after valve drives hydraulic motor 2 to rotate.This pressure oil is by, after shuttle valve 7, opening liquid
Control reversal valve 4.The reversal valve 5 simultaneously controlling electromagnetic form is energized, and this pressure oil is opened through air relief valve 3 and pilot operated directional control valve 4
Qi Weihou, enters hoist brake 1 by C3 mouth, makes hoist brake 1 release the braking action to hoist motor 2, elevator horse
Reach 2 rotations.
When needs hoist motor 2 stops expanding-contracting action, the now hydraulic oil off-load of V1 mouth or V2 mouth, pilot operated directional control valve 4
Close, control reversal valve 5 power-off of electromagnetic form simultaneously, the closedown by pilot operated directional control valve 4 of the pressure oil in hoist brake 1
The power down bit of the reversal valve 5 of position and electromagnetic form carries out dual pathways off-load.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to preferred embodiment, and those of ordinary skill in the field are it is understood that still
The detailed description of the invention of the present invention can be modified or portion of techniques feature is carried out equivalent；Without deviating from this
The spirit of bright technical scheme, it all should be contained in the middle of the technical scheme scope that the present invention is claimed.
Claims (10)
1. an elevator brake control valve, it is characterised in that including: load pressure obtains mechanism and air relief valve (3), described decompression
The delivery outlet that the import of valve (3) obtains mechanism with described load pressure connects, the outlet of described air relief valve (3) and described elevator system
It is operably connected between dynamic device (1), so that described load pressure obtains the hydraulic fluid of mechanism's output through described air relief valve
(3) it is supplied to described hoist brake (1) after decompression.
Elevator brake control valve the most according to claim 1, it is characterised in that in outlet and the institute of described air relief valve (3)
State and between hoist brake (1), be additionally provided with choke valve (6).
Elevator brake control valve the most according to claim 1, it is characterised in that also include unloader (5), described unloader
(5) it is arranged in the first hydraulic flow path between earial drainage stream (L) and described hoist brake (1), it is possible to selectively close
Described first hydraulic flow path or guide described hoist brake (1) by described first hydraulic flow path off-load.
Elevator brake control valve the most according to claim 3, it is characterised in that also include pilot operated directional control valve (4), described liquid
The delivery outlet that the hydraulic control mouth of control reversal valve (4) obtains mechanism with described load pressure connects, and described pilot operated directional control valve (4) is arranged on
On the second hydraulic flow path between described air relief valve (3) and described hoist brake (1), it is possible to obtain according to described load pressure
The load pressure signal of mechanism's output is selectively closed described second hydraulic flow path or is directed through described air relief valve (3) decompression
After hydraulic fluid be supplied to described hoist brake (1) by described second hydraulic flow path.
Elevator brake control valve the most according to claim 4, it is characterised in that described pilot operated directional control valve (4) is at close stance
Described hoist brake (1) off-load can also be guided.
Elevator brake control valve the most according to claim 3, it is characterised in that described unloader (5) be electromagnetic form or
The reversal valve of hydraulic control form, it is possible to open described first hydraulic flow path when elevator action stops, so that described hoist brake
(1) by described first hydraulic flow path off-load；And described first hydraulic flow path is closed when elevator action is carried out.
Elevator brake control valve the most according to claim 1, it is characterised in that described load pressure obtains mechanism and includes pressure
Power selects device, described pressure select the input port of device respectively with each bar live load hydraulic flow path of hoist motor (2)
(V1, V2) connects, it is possible to select the flow of pressurized that the maximum load pressure in each bar live load hydraulic flow path (V1, V2) is corresponding
Body is exported by delivery outlet.
Elevator brake control valve the most according to claim 7, it is characterised in that described pressure selects device to be shuttle valve (7)
Or shuttle valve network.
Elevator brake control valve the most according to claim 4, it is characterised in that described air relief valve (3) and described hydraulic control are changed
All connect with described earial drainage stream (L) to the spring cavity of valve (4).
10. a hook and ladder, including the hoist motor (2) that the described ladder of work platforms, ladder and control is flexible, its feature
It is, also includes the arbitrary described elevator brake control valve of claim 1～9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610735232.0A CN106185681A (en) | 2016-08-26 | 2016-08-26 | A kind of elevator brake control valve for hook and ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610735232.0A CN106185681A (en) | 2016-08-26 | 2016-08-26 | A kind of elevator brake control valve for hook and ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106185681A true CN106185681A (en) | 2016-12-07 |
Family
ID=57526720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610735232.0A Pending CN106185681A (en) | 2016-08-26 | 2016-08-26 | A kind of elevator brake control valve for hook and ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106185681A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233697A (en) * | 2021-12-14 | 2022-03-25 | 重庆敏泰液压技术有限公司 | Balance valve for aerial ladder truck |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2062847A1 (en) * | 1998-06-26 | 2009-05-27 | Kobelco Cranes Co., Ltd. | Hydraulic winch |
| CN202296945U (en) * | 2011-09-29 | 2012-07-04 | 宁波赛欧液压传动有限公司 | Hoisting transmission of reducer |
| CN103641023A (en) * | 2013-12-17 | 2014-03-19 | 徐州重型机械有限公司 | Control valve, hydraulic control system of winch brake and crane |
| CN104154059A (en) * | 2014-06-19 | 2014-11-19 | 长沙中联消防机械有限公司 | Hydraulic system of telescopic device and telescopic device |
| CN104192749A (en) * | 2014-07-29 | 2014-12-10 | 徐州五洋科技股份有限公司 | Mining explosion-proof type hydraulic winch hydraulic system |
| CN105217508A (en) * | 2014-10-30 | 2016-01-06 | 徐州重型机械有限公司 | A kind of hoist brake control system, method and hoisting crane |
| CN206126738U (en) * | 2016-08-26 | 2017-04-26 | 徐工消防安全装备有限公司 | Hoist brake control valve and hook and ladder |
-
2016
- 2016-08-26 CN CN201610735232.0A patent/CN106185681A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2062847A1 (en) * | 1998-06-26 | 2009-05-27 | Kobelco Cranes Co., Ltd. | Hydraulic winch |
| CN202296945U (en) * | 2011-09-29 | 2012-07-04 | 宁波赛欧液压传动有限公司 | Hoisting transmission of reducer |
| CN103641023A (en) * | 2013-12-17 | 2014-03-19 | 徐州重型机械有限公司 | Control valve, hydraulic control system of winch brake and crane |
| CN104154059A (en) * | 2014-06-19 | 2014-11-19 | 长沙中联消防机械有限公司 | Hydraulic system of telescopic device and telescopic device |
| CN104192749A (en) * | 2014-07-29 | 2014-12-10 | 徐州五洋科技股份有限公司 | Mining explosion-proof type hydraulic winch hydraulic system |
| CN105217508A (en) * | 2014-10-30 | 2016-01-06 | 徐州重型机械有限公司 | A kind of hoist brake control system, method and hoisting crane |
| CN206126738U (en) * | 2016-08-26 | 2017-04-26 | 徐工消防安全装备有限公司 | Hoist brake control valve and hook and ladder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233697A (en) * | 2021-12-14 | 2022-03-25 | 重庆敏泰液压技术有限公司 | Balance valve for aerial ladder truck |
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Effective date of registration: 20180605 Address after: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Applicant after: XCMG Construction Machinery Co., Ltd. Applicant after: Xugong fire safety equipment Co. Ltd. Address before: 221004 Tongshan Road, Yunlong District, Xuzhou, Jiangsu Province, No. 165 Applicant before: Xugong fire safety equipment Co. Ltd. |
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Application publication date: 20161207 |