CN103481882B - Four bridge chassis service braking systems and there is the hoisting crane of this service braking system - Google Patents
Four bridge chassis service braking systems and there is the hoisting crane of this service braking system Download PDFInfo
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- CN103481882B CN103481882B CN201310479051.2A CN201310479051A CN103481882B CN 103481882 B CN103481882 B CN 103481882B CN 201310479051 A CN201310479051 A CN 201310479051A CN 103481882 B CN103481882 B CN 103481882B
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Abstract
The present invention discloses a kind of service brake control system of four bridge chassis, its brake activation valve is communicated with the control mouth of the first relay valve of the first brake circuit, for controlling the compressed air brake cylinder of two bridges, the compressed air brake cylinder of the one bridge left and right sides is controlled to be communicated with by the second relay valve and the 3rd relay valve respectively, and the control mouth of the second relay valve is communicated with the air extractor duct of the anti-lock electromagnetic valve of two bridges respectively with the control mouth of the 3rd relay valve; Its brake activation valve is communicated with the control mouth of the 4th relay valve of the second brake circuit, for controlling the compressed air brake cylinder of four bridges, the compressed air brake cylinder of the three bridge left and right sides is controlled to be communicated with by the 5th relay valve and the 6th relay valve respectively, and the control mouth of the 5th relay valve is communicated with the air extractor duct of the anti-lock electromagnetic valve of four bridges respectively with the control mouth of the 6th relay valve.Configured by system optimization, to evade two bridges completely and abnormal locking phenomenon appears in four bridges.On this basis, the present invention also provides a kind of hoisting crane with this service brake control system.
Description
Technical field
The present invention relates to technical field of engineering machinery, be specifically related to a kind of four bridge chassis service braking systems and there is the hoisting crane of this service braking system.
Background technology
Along with the development of world economy, the large-scale construction project such as wind-powered electricity generation, large-scale petrochemical is increasing, and full ground automobile chassis crane is able to widespread use; Particularly, four bridge crane chassis move flexibly with it, transition rapid, can drop into the feature of operation fast, be subject to the favor in market.As everyone knows, automobile chassis crane, setting out on a journey in traveling and hoisting operation process, all needs to possess good deceleration and stopping performance, to meet the security requirement of overall performance.
At present, the service brake control system of full ground four bridge car hosit is double loop gas circuit braking control system.Particularly, one or two bridges are controlled by a brake circuit, and three or four bridges are controlled by a brake circuit, and coordinate respectively by brake activation valve and relay valve the traffic organising realizing high brake pressure gas; But forming and the restriction of control principle by himself, there is following defect in the braking control system of existing four bridge crane chassis:
First, a pin relay valve of a bridge controls left and right sides four compressed air brake cylinders, and compressed air brake cylinder inlet pressure is less than ABS air extractor duct pressure, and intake efficiency is lower; Two bridge left and right sides compressed air brake cylinders are controlled by a pin relay valve respectively, and admission port directly connects air tank, and compressed air brake cylinder inlet pressure is approximately equal to air tank pressure, and intake efficiency is relatively high, and lock torque can be provided larger.But two bridge axle loads are less than a bridge axle load during service brake, even if under identical lock torque, also more easily produce locking compared to a bridge, and the control of ABS control system is a bridge braking, therefore, in braking procedure very easily there is locking phenomenon in two bridges.
Secondly, three or four bridge pin relay valve connection modes are identical with one or two bridges, in service braking operation, four bridge axle loads are less than three bridge axle loads, and the lock torque that four bridge brake circuits provide is greater than three bridges, and when not having ABS Systematical control to brake four bridges be easy to produce locking cause complete machine braking swerve
In view of this, the service brake control system urgently looked for another way for existing four bridge chassis is optimized design, to avoid service braking operation Zhong Erqiao and four bridges to occur abnormal locking phenomenon, and then avoids the generation of safety misadventure.
Summary of the invention
For above-mentioned defect, the technical matters that the present invention solves is the service brake control system providing a kind of four bridge chassis, is configured by system optimization, to evade two bridges completely and abnormal locking phenomenon appears in four bridges.On this basis, the present invention also provides a kind of hoisting crane with this service brake control system.
The service brake control system on four bridge chassis provided by the invention, wherein, the left and right sides of a bridge and two bridges has two compressed air brake cylinders respectively, and the left and right sides of three bridges and four bridges has a compressed air brake cylinder respectively; And a described bridge and two bridges are controlled by the first brake circuit, described three bridges and four bridges are controlled by the second brake circuit, and control described first brake circuit and described second brake circuit by foot brake valves; Described brake activation valve is communicated with the control mouth of the first relay valve of described first brake circuit, and the first air extractor duct of described first relay valve is connected with the compressed air brake cylinder on the left of described two bridges via the first anti-lock electromagnetic valve, the second air extractor duct is connected with the compressed air brake cylinder on the right side of described two bridges via the second anti-lock electromagnetic valve; The compressed air brake cylinder of a described bridge left and right sides is controlled to be communicated with by the second relay valve and the 3rd relay valve respectively, and the control mouth of described second relay valve is communicated with the air extractor duct of described first anti-lock electromagnetic valve, the control mouth of described 3rd relay valve is communicated with the air extractor duct of described second anti-lock electromagnetic valve; Described brake activation valve is communicated with the control mouth of the 4th relay valve of described second brake circuit, and the first air extractor duct of described 4th relay valve is connected with the compressed air brake cylinder on the left of described four bridges via the 3rd anti-lock electromagnetic valve, the second air extractor duct is connected with the compressed air brake cylinder on the right side of described four bridges via the 4th anti-lock electromagnetic valve; The compressed air brake cylinder of the described three bridge left and right sides is controlled to be communicated with by the 5th relay valve and the 6th relay valve respectively, and the control mouth of described 5th relay valve is communicated with the air extractor duct of described 3rd anti-lock electromagnetic valve, the control mouth of described 6th relay valve is communicated with the air extractor duct of described 4th anti-lock electromagnetic valve.
Preferably, two air extractor ducts of described second relay valve are communicated with the compressed air brake cylinder of forward right side with the described front left side of a bridge respectively, and two air extractor ducts of described 3rd relay valve are communicated with the compressed air brake cylinder of right lateral side with the described left rear side of a bridge respectively.
Preferably, an air extractor duct of described 5th relay valve is communicated with the compressed air brake cylinder on the left of described three bridges, an air extractor duct of described 6th relay valve is communicated with the compressed air brake cylinder on the right side of described three bridges, and another air extractor duct of described 5th relay valve is communicated with another air extractor duct of described 6th relay valve.
Preferably, each described relay valve is pin relay valve, and described brake activation valve is foot brake valves.
Preferably, each described relay valve is all communicated with same pressure gas source.
Hoisting crane provided by the invention, comprises four bridge chassis and service brake control system thereof, to carry out four travelling gantry frame brakings; Described service brake control system is specially the service brake control system on foregoing four bridge chassis.
Compared with prior art, four bridge crane chassis service brake control system provided by the invention have carried out the improvement of principle.Particularly, its foot brake valves is communicated with the control mouth of the first relay valve of the first brake circuit, and the first air extractor duct of this first relay valve is connected with the compressed air brake cylinder on the left of two bridges via the first anti-lock electromagnetic valve, the second air extractor duct is connected with the compressed air brake cylinder on the right side of two bridges via the second anti-lock electromagnetic valve; Two bridges are controlled by ABS antiblock device, and control the pressed gas of two bridges, four compressed air brake cylinders by a relay valve; The compressed air brake cylinder of the one bridge left and right sides is controlled to be communicated with by the second relay valve and the 3rd relay valve respectively, and that is, four compressed air brake cylinders of a bridge are controlled by two relay valves, can provide larger lock torque; And the control mouth of the second relay valve is communicated with the air extractor duct of the first anti-lock electromagnetic valve, the control mouth of the 3rd relay valve is communicated with the air extractor duct of the second anti-lock electromagnetic valve; Thus, under identical lock torque, there will not be two bridge locking phenomenons, improve the road-holding property of car load.
Identical with the configuration principle of a bridge, two bridges, its foot brake valves is communicated with the control mouth of the 4th relay valve of the second brake circuit, and the first air extractor duct of the 4th relay valve is connected with the compressed air brake cylinder on the left of four bridges via the 3rd anti-lock electromagnetic valve, the second air extractor duct is connected with the compressed air brake cylinder on the right side of four bridges via the 4th anti-lock electromagnetic valve; Four bridges are controlled by ABS antiblock device, and control the pressed gas of four bridges, two compressed air brake cylinders by a relay valve; The compressed air brake cylinder of its three bridges left and right sides is controlled to be communicated with by the 5th relay valve and the 6th relay valve respectively, and that is, two compressed air brake cylinders of three bridges are controlled by two relay valves, can provide larger lock torque; And the control mouth of the 5th relay valve is communicated with the air extractor duct of the 3rd anti-lock electromagnetic valve, the control mouth of the 6th relay valve is communicated with the air extractor duct of described 4th anti-lock electromagnetic valve; Similarly, under identical lock torque, there will not be four bridge locking phenomenons, and then complete machine braking swerve can be evaded completely, further increase the road-holding property of car load.
In preferred version of the present invention, two air extractor ducts of the second relay valve are communicated with the compressed air brake cylinder of forward right side with the front left side of a bridge respectively, and two air extractor ducts of the 3rd relay valve are communicated with the compressed air brake cylinder of right lateral side with the left rear side of a bridge respectively; That is, a relay valve controls two compressed air brake cylinders on front side of a bridge, and another relay valve controls two compressed air brake cylinders on rear side of a bridge.Setting like this, the branch road controlled when side relay valve breaks down, and about opposite side, two compressed air brake cylinders still possess braking potential, for service brake safety provides failure-free guarantee.
In another preferred version of the present invention, an air extractor duct of the 5th relay valve is communicated with the compressed air brake cylinder on the left of three bridges, and an air extractor duct of the 6th relay valve is communicated with the compressed air brake cylinder on the right side of three bridges; Another air extractor duct of 5th relay valve is communicated with another air extractor duct of the 6th relay valve.Thus, when can realize side relay valve brake circuit inefficacy, opposite side relay valve supplements air feed, ensures that this side compressed air brake cylinder still has brake efficiency, farthest utilizes the brake efficiency of existing brake circuit.
The service brake control system on four bridge chassis provided by the invention is applicable to any type of construction machinery and equipment, is specially adapted to hoisting crane.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the service brake control system on four bridge chassis described in detailed description of the invention.
In figure:
First relay valve 11, first air extractor duct 111, second air extractor duct 112, control mouth 113, first anti-lock electromagnetic valve 12, second anti-lock electromagnetic valve 13, second relay valve 14, first air extractor duct 141, second air extractor duct 142, control mouth 143, 3rd relay valve 15, first air extractor duct 151, second air extractor duct 152, control mouth 153, 4th relay valve 21, first air extractor duct 211, second air extractor duct 212, control mouth 213, 3rd anti-lock electromagnetic valve 22, 4th anti-lock electromagnetic valve 23, 5th relay valve 24, first air extractor duct 241, second air extractor duct 242, control mouth 243, 6th relay valve 25, first air extractor duct 251, second air extractor duct 252, control mouth 253, compressed air brake cylinder 3.
Detailed description of the invention
Core of the present invention is to provide a kind of service brake control system for four bridge chassis, this system is optimized configuration in conjunction with the feature on four bridge chassis to service braking system, two bridges can be evaded completely and abnormal locking phenomenon appears in four bridges, for the traffic safety stability of car load provides failure-free guarantee.Present embodiment is illustrated below in conjunction with Figure of description.
Refer to Fig. 1, this figure is the principle schematic of the service brake control system on four bridge chassis described in present embodiment.
Shown in figure, a bridge, two bridges, three bridges and four bridges are followed successively by from front to back along direction of traffic, in service braking operation, two, four bridge axle loads are less than one, three bridge axle loads respectively, therefore, the left and right sides that the left and right sides of one bridge and two bridges has two compressed air brake cylinders 3, three bridge and four bridges respectively has a compressed air brake cylinder 3 respectively; Should be appreciated that the braking principle that each vehicle bridge realizes corresponding vehicle bridge based on compressed air brake cylinder 3 is same as the prior art, therefore do not remake too much description herein.
Similarly, the service brake control system on this four bridges chassis comprises two-way brake circuit, and as shown in the figure, one bridge and two bridges are controlled by the first brake circuit, and Qi Sanqiao and four bridges are controlled by the second brake circuit; Two-way brake circuit carries out by a brake activation valve regulation and control controlling gas circuit, and after brake activation valve is opened, after air pressure reaches certain pressure, the relay valve in this loop is opened, and starts, respectively to compressed air brake cylinder 3 air feed of each vehicle bridge, to realize service brake.Wherein, brake activation valve preferably adopts foot brake valves.
Wherein, foot brake valves (not shown) is communicated with the control mouth 113 of the first relay valve 11, regulates and controls the opening of the first relay valve 11; First air extractor duct 111 of this first relay valve 11 is connected with two compressed air brake cylinders 3 on the left of two bridges via the first anti-lock (ABS) electromagnetic valve 12, the second air extractor duct 112 is connected with the both sides compressed air brake cylinder 3 on the right side of two bridges via the second anti-lock electromagnetic valve 13, like this, two bridges control the pressed gas of its four compressed air brake cylinders 3 by first relay valve 11, and Negotiation speed sensor detects the rotating speed of two bridge tires, is controlled by ABS antiblock device; Wherein, the compressed air brake cylinder 3 of the one bridge left and right sides is controlled to be communicated with the 3rd relay valve 15 by the second relay valve 14 respectively, that is, four compressed air brake cylinders 3 of one bridge are controlled by two relay valves (14,15), and the direct Bonding pressure source of the gas (air tank) of admission port, under identical road surface attachment condition, larger lock torque can be provided; And the control mouth 143 of the second relay valve 14 is communicated with the air extractor duct of the first anti-lock electromagnetic valve 12, the control mouth 153 of the 3rd relay valve 15 is communicated with the air extractor duct of the second anti-lock electromagnetic valve 13, is specifically shunted the control gas circuit of formation control one bridge two relay valves by a road of corresponding ABS electromagnetic valve mineralization pressure gas.Thus, under identical lock torque, there will not be two bridge locking phenomenons.
Wherein, foot brake valves (not shown) is communicated with the control mouth 213 of the 4th relay valve 21, the opening of regulation and control the 4th relay valve 21; First air extractor duct 211 of the 4th relay valve 21 is connected with two compressed air brake cylinders 3 on the left of four bridges via the 3rd anti-lock electromagnetic valve 22, its second air extractor duct 212 is connected with two compressed air brake cylinders 3 on the right side of four bridges via the 4th anti-lock electromagnetic valve 23, like this, four bridges control the pressed gas of its four compressed air brake cylinders 3 by the 4th relay valve 21, and Negotiation speed sensor detects the rotating speed of four bridge tires, is controlled by ABS antiblock device; Wherein, the compressed air brake cylinder 3 of the three bridge left and right sides is controlled to be communicated with the 6th relay valve 25 by the 5th relay valve 24 respectively, obviously, two compressed air brake cylinders 3 of three bridges are controlled by two relay valves (24,25), and the direct Bonding pressure source of the gas (air tank) of admission port, under identical road surface attachment condition, similarly can provide larger lock torque; And the control mouth 243 of the 5th relay valve 24 is communicated with the air extractor duct of the 3rd anti-lock electromagnetic valve 23, the control mouth 253 of the 6th relay valve 25 is communicated with the air extractor duct of four anti-lock electromagnetic valves 23, thus the control gas circuit of formation control three bridge two relay valves is shunted by a road of corresponding ABS electromagnetic valve mineralization pressure gas, in like manner, under identical lock torque, there will not be four bridge locking phenomenons.
Here, each relay valve is pin relay valve, to possess good operating characteristic; It should be noted that, pin relay valve can adopt existing techniques in realizing completely.
In order to obtain better service brake safety, can do further to optimize on the basis of above-mentioned service brake control system.As shown in the figure, the first air extractor duct 141 of the second relay valve 14 is communicated with the compressed air brake cylinder 3 of the front left side of a bridge, and its second air extractor duct 142 is communicated with the compressed air brake cylinder 3 of the forward right side of a bridge; First air extractor duct 151 of the 3rd relay valve 15 is communicated with the left rear side compressed air brake cylinder 3 of a bridge, and the second air extractor duct 152 of the 3rd relay valve 15 is communicated with the compressed air brake cylinder 3 of the right lateral side of a bridge.Like this, utilize a relay valve to control two compressed air brake cylinders on front side of a bridge, another relay valve controls two compressed air brake cylinders on rear side of a bridge, and advantage is in side relay valve brake circuit fault, about opposite side, two compressed air brake cylinders still possess braking potential, thus improve service brake safety.
In addition, further optimization can also be done for the embody rule mode of two relay valves of control three bridge.As shown in the figure, first air extractor duct 241 of the 5th relay valve 24 is communicated with the compressed air brake cylinder 3 on the left of three bridges, second air extractor duct 242 of the 5th relay valve 24 is communicated with the first air extractor duct 251 of the 6th relay valve 25, and the second air extractor duct 252 of the 6th relay valve 25 is communicated with the compressed air brake cylinder 3 on the right side of three bridges.Thus, two air extractor ducts (242, the 251) mouth of two relay valves of three bridges is directly connected, when realizing side relay valve brake circuit inefficacy, air feed can be supplemented by opposite side relay valve, ensure that the compressed air brake cylinder 3 of this side still has brake efficiency, farthest make use of the brake efficiency of existing brake circuit.
Special version, each relay valve can all be communicated with same pressure gas source (not shown), and that is, the independent air tank be connected with each relay valve is all unified by air compressor air feed; Independently can certainly configure a pressure gas source, obtain preferably braking effect in addition; During actual design, can select as required, as long as meet above-mentioned functions needs all in the scope of the application's request protection.
Except the service brake control system on aforementioned four bridge chassis, present embodiment also provides the hoisting crane of this service brake control system of a kind of application, to carry out actv. service brake; Similarly it should be noted that, other functional components such as chassis, electric system, hoisting system, power system of this hoisting crane all can adopt existing techniques in realizing, therefore repeat no more herein, and do not carry out corresponding diagram.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the service brake control system on four bridge chassis, wherein, the left and right sides of a bridge and two bridges has two compressed air brake cylinders respectively, and the left and right sides of three bridges and four bridges has a compressed air brake cylinder respectively; And a described bridge and two bridges are controlled by the first brake circuit, described three bridges and four bridges are controlled by the second brake circuit, and control described first brake circuit and described second brake circuit by brake activation valve; It is characterized in that,
Described brake activation valve is communicated with the control mouth of the first relay valve of described first brake circuit, and the first air extractor duct of described first relay valve is connected with the compressed air brake cylinder on the left of described two bridges via the first anti-lock electromagnetic valve, the second air extractor duct is connected with the compressed air brake cylinder on the right side of described two bridges via the second anti-lock electromagnetic valve; The compressed air brake cylinder of a described bridge left and right sides is controlled to be communicated with by the second relay valve and the 3rd relay valve respectively, and the control mouth of described second relay valve is communicated with the air extractor duct of described first anti-lock electromagnetic valve, the control mouth of described 3rd relay valve is communicated with the air extractor duct of described second anti-lock electromagnetic valve;
Described brake activation valve is communicated with the control mouth of the 4th relay valve of described second brake circuit, and the first air extractor duct of described 4th relay valve is connected with the compressed air brake cylinder on the left of described four bridges via the 3rd anti-lock electromagnetic valve, the second air extractor duct is connected with the compressed air brake cylinder on the right side of described four bridges via the 4th anti-lock electromagnetic valve; The compressed air brake cylinder of the described three bridge left and right sides is controlled to be communicated with by the 5th relay valve and the 6th relay valve respectively, and the control mouth of described 5th relay valve is communicated with the air extractor duct of described 3rd anti-lock electromagnetic valve, the control mouth of described 6th relay valve is communicated with the air extractor duct of described 4th anti-lock electromagnetic valve.
2. the service brake control system on four bridge chassis according to claim 1, it is characterized in that, two air extractor ducts of described second relay valve are communicated with the compressed air brake cylinder of forward right side with the described front left side of a bridge respectively, and two air extractor ducts of described 3rd relay valve are communicated with the compressed air brake cylinder of right lateral side with the described left rear side of a bridge respectively.
3. the service brake control system on four bridge chassis according to claim 1 and 2, it is characterized in that, an air extractor duct of described 5th relay valve is communicated with the compressed air brake cylinder on the left of described three bridges, an air extractor duct of described 6th relay valve is communicated with the compressed air brake cylinder on the right side of described three bridges, and another air extractor duct of described 5th relay valve is communicated with another air extractor duct of described 6th relay valve.
4. the service brake control system on four bridge chassis according to claim 3, is characterized in that, each described relay valve is pin relay valve, and described brake activation valve is foot brake valves.
5. the service brake control system on four bridge chassis according to claim 1, is characterized in that, each described relay valve is all communicated with same pressure gas source.
6. hoisting crane, comprises four bridge chassis and service brake control system thereof, to carry out four travelling gantry frame brakings; It is characterized in that, described service brake control system specifically adopts the service brake control system on four bridge chassis according to any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310479051.2A CN103481882B (en) | 2013-10-14 | 2013-10-14 | Four bridge chassis service braking systems and there is the hoisting crane of this service braking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310479051.2A CN103481882B (en) | 2013-10-14 | 2013-10-14 | Four bridge chassis service braking systems and there is the hoisting crane of this service braking system |
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| CN103481882A CN103481882A (en) | 2014-01-01 |
| CN103481882B true CN103481882B (en) | 2015-09-16 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106080563A (en) * | 2016-07-05 | 2016-11-09 | 徐州重型机械有限公司 | Service brake control system and vehicle |
| CN106004847B (en) * | 2016-07-13 | 2019-03-19 | 徐州重型机械有限公司 | Air braking system and working truck |
| CN110371095B (en) * | 2019-07-23 | 2020-09-18 | 一汽解放汽车有限公司 | Service braking system and vehicle |
| CN111252054B (en) * | 2020-01-20 | 2021-09-17 | 中车株洲电力机车有限公司 | Braking system |
| CN112172768B (en) * | 2020-10-29 | 2021-08-20 | 刘剑 | Pneumatic brake device for vehicle |
| CN114802146B (en) * | 2022-05-25 | 2023-11-03 | 中国重汽集团济南动力有限公司 | Rear axle driving double-loop control braking system and vehicle |
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