CN103466451A - Control device for diesel single-rail crane - Google Patents
Control device for diesel single-rail crane Download PDFInfo
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- CN103466451A CN103466451A CN2013104159690A CN201310415969A CN103466451A CN 103466451 A CN103466451 A CN 103466451A CN 2013104159690 A CN2013104159690 A CN 2013104159690A CN 201310415969 A CN201310415969 A CN 201310415969A CN 103466451 A CN103466451 A CN 103466451A
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Abstract
The invention provides a control device for a diesel single-rail crane which solves the problems that a control system of an existing domestic diesel single-rail crane is lack of functions, and cannot safely control the diesel single-rail crane to start, and the service life of the diesel single-rail crane is affected. The control device for the diesel single-rail crane comprises a start motor, an accelerator oil cylinder, an air valve oil cylinder, an energy accumulator, a hydraulic oil pump and an anti-explosion electromagnetic reversing valve, wherein the energy accumulator is connected with the start motor through a pilot operated directional control valve and a manual reversing valve sequentially, and is respectively connected with the accelerator oil cylinder and the air valve oil cylinder sequentially through the manual reversing valve and a first shuttle valve; the hydraulic oil pump is respectively connected with the energy accumulator and the pilot operated directional control valve; a second shuttle valve is also arranged between the hydraulic oil pump and the reversing valve; the anti-explosion electromagnetic reversing valve is respectively connected with the energy accumulator, the first shuttle valve, the manual reversing valve and the pilot operated directional control valve. The safety start device for the diesel single-rail crane disclosed by the invention effectively guarantees the using safety of the diesel single-rail crane, is reasonable in structure design, good in control property, and wide in application range.
Description
Technical field
The present invention relates to mining monorail crane machine technology field, refer to especially a kind of diesel oil single track loop wheel machine control setup.
Background technology
The auxiliary conveying equipments that travels on the suspended single-track system that the single track loop wheel machine is a kind of mobility strong, running velocity is fast, load carrying ability is large, safe and reliable, it is the first-selected transportation means of assistant conveyance under coal mine in recent years.At present, the monorail crane machine used in the China's coal-mine transportation is mainly the anti-explosion diesel single track loop wheel machine of external import, transport capacity is large, hill climbing ability is strong, efficiency is high, but its cost has high input, the maintenance maintenance expense is high, fittings supply is restricted, therefore promote import anti-explosion diesel engine single track loop wheel machine difficult.
With the anti-explosion diesel single track loop wheel machine of import, compare, domestic diesel oil single track loop wheel machine control system function is simple, can't effectively control diesel oil single track loop wheel machine starts with flame-out, even cause launching system to produce expendable destruction, shorten the service life of diesel oil single track loop wheel machine, cause very large danger even to the start personnel.How to increase the function of the control system of domestic diesel oil single track loop wheel machine, effectively control diesel oil single track loop wheel machine and start with flame-out, protection diesel oil single track loop wheel machine and staff's safety of operation, be to apply the technical barrier that domestic diesel oil single track loop wheel machine must overcome.
Summary of the invention
The present invention proposes a kind of diesel oil single track loop wheel machine control setup, for the control system function that solves existing domestic diesel oil single track loop wheel machine, lacks, and can't effectively control diesel oil single track loop wheel machine and start, and affects the problem in its service life.
Technical scheme of the present invention is achieved in that
A kind of diesel oil single track loop wheel machine control setup comprises:
Starter motor;
Hydraulic throttle actuator;
The valve oil cylinder;
Energy storage, energy storage is connected with starter motor by pilot operated directional control valve, hand change over valve successively; Energy storage is connected with hydraulic throttle actuator, valve oil cylinder respectively by hand change over valve, the first shuttle valve successively;
Hydraulic oil pump, hydraulic oil pump is connected with energy storage, pilot operated directional control valve respectively, also is provided with the second shuttle valve between hydraulic oil pump and change-over valve;
The anti-explosion is electromagnetic change-over valve, the anti-explosion is electromagnetic change-over valve is connected with energy storage, the first shuttle valve, hand change over valve, pilot operated directional control valve respectively.
Preferably, also comprise controller, controller is connected with the anti-explosion is electromagnetic change-over valve.
Preferably, be provided with signal detector on controller.
Preferably, also comprise check valve, check valve is arranged between energy storage and hydraulic oil pump.
Preferably, hand change over valve comprises: the first hand change over valve and the second hand change over valve.
Preferably, the first hand change over valve and the second manual reverse of direction valve events are synchronous.
Preferably, the first hand change over valve is arranged between energy storage and the first shuttle valve; The second hand change over valve is arranged between pilot operated directional control valve and starter motor; The anti-explosion is electromagnetic change-over valve is connected with the first hand change over valve, the second hand change over valve respectively.
Preferably, also comprise the 3rd hand change over valve, an end of the 3rd hand change over valve is connected with anti-explosion is electromagnetic change-over valve, the first hand change over valve respectively, and the other end is connected with the first shuttle valve, hydraulic throttle actuator and valve oil cylinder respectively.
Compared with prior art, advantage of the present invention and beneficial effect have:
1, the present invention can realize that manual safety starts, after starting diesel engine no matter all no longer make HM Hydraulic Motor rotate under any condition, avoid HM Hydraulic Motor to receive damage, extended the service life of HM Hydraulic Motor;
2, the present invention can realize auto shut down, at diesel oil single track loop wheel machine, breaks down, exceeds the speed limit, transfinites or environment gas overpressure timestamp, automatically cuts off throttle and the valve of diesel oil single track loop wheel machine, hard closing driving engine, the use safety of assurance monorail crane locomotive;
3, the domestic parts of whole employing of the present invention, cost is low, maintenance maintenance is convenient, can on domestic diesel oil single track loop wheel machine, use, and also can be applicable to scope large for changing the relevant apparatus on import diesel oil single track loop wheel machine, can apply on a large scale.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the hydraulic schematic diagram of a kind of diesel oil single track of the present invention loop wheel machine with control setup;
Fig. 2 is the auto shut down schematic diagram of the function of a kind of diesel oil single track of the present invention loop wheel machine with control setup.
In figure:
1, starter motor; 2, energy storage; 23, check valve; 3, hydraulic oil pump; 4, anti-explosion is electromagnetic change-over valve; 51, the first shuttle valve; 52, the second shuttle valve; 61, the first hand change over valve; 62, the second hand change over valve; 7, pilot operated directional control valve; 8, hydraulic throttle actuator; 9, valve oil cylinder; 10, the 3rd hand change over valve; 11, controller.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
As shown in Figure 1:
A kind of diesel oil single track loop wheel machine control setup comprises:
Starter motor 1;
Energy storage 2, energy storage 2 is connected with starter motor 1 by pilot operated directional control valve 7, hand change over valve successively; Energy storage 2 is connected with hydraulic throttle actuator 8, valve oil cylinder 9 respectively by hand change over valve, the first shuttle valve 51 successively;
Anti-explosion is electromagnetic change-over valve 4, anti-explosion is electromagnetic change-over valve 4 is connected with energy storage 2, the first shuttle valve 51, hand change over valve, pilot operated directional control valve 7 respectively.
Principle of work: when the driving engine of diesel oil single track loop wheel machine does not start, hydraulic throttle actuator 8 presses to right-hand member with the spring in valve oil cylinder 9 by piston, and the valve that the throttle that hydraulic throttle actuator 8 is controlled and valve oil cylinder 9 are controlled is all in closed condition; While manually booting diesel oil single track loop wheel machine, pull hand change over valve, from the oil liquid pressure P of energy storage 2
holdbe divided into two-way: a road enters hydraulic throttle actuator 8 and valve oil cylinder 9 through hand change over valve 6, the first shuttle valve 51, promotes piston and is moved to the left, and opens throttle and valve; Another road enters starter motor 1 through the right position of pilot operated directional control valve 7, hand change over valve, promotes starter motor 1 and rotates, and then drives diesel oil single track loop wheel machine and rotates, and completes the startup of diesel oil single track loop wheel machine.
After diesel oil single track loop wheel machine starts, the hydraulic oil pump 3 driven by diesel oil single track loop wheel machine is started working, and hydraulic efficiency pressure system produces pressure P
pump, P
pumpmake pilot operated directional control valve 7 actions via the second shuttle valve 52, cut off P
holdthe oil circuit that leads to hand change over valve; When diesel oil single track loop wheel machine needs traction, the P that hydraulic oil pump 1 produces
dragmake pilot operated directional control valve 7 actions via the second shuttle valve 52, cut off P
holdthe oil circuit that leads to hand change over valve; In these cases, even operate the first hand change over valve 4, can not make starter motor 1 rotate yet, avoid starter motor 1 to be damaged, extend the service life of starter motor 1.
As a kind of preferred technical scheme, another embodiment of the present invention, also comprise controller 11, and controller 11 is connected with anti-explosion is electromagnetic change-over valve 4.
As a kind of preferred technical scheme, an embodiment more of the present invention, be provided with signal detector on controller 11.
As shown in Figure 2: the information acquisition system of diesel oil single track loop wheel machine is responsible for detecting locomotive failure, the operation hypervelocity, loading transfinites, tunnel gas overpressure timestamp, if and the information command detected sent to signal to controller 11(diesel oil single track loop wheel machine, do not have the configuration information acquisition system, on this controller 11, signal detector can be installed, detect locomotive failure, the operation hypervelocity, loading transfinites, tunnel gas exceeds standard, and the signal detected is transferred to controller 11), controller 11 cuts off the power supply of anti-explosion is electromagnetic change-over valve 4, the piston of hydraulic throttle actuator 8 and valve oil cylinder 9 is return original position under the effect of spring, cut off oil circuit and the gas circuit of diesel oil single track loop wheel machine, the setting of auto shut down function, can be when the dangerous factor of environment, and the hard closing driving engine, avoid driving engine to be damaged, and has extended the service life of diesel oil single track loop wheel machine.
As a kind of preferred technical scheme, another embodiment of the present invention, also comprise check valve 23, and check valve 23 is arranged between energy storage 2 and hydraulic oil pump 3.
When hydraulic oil pump 3 work, pressure oil is energy storage 2 topping ups by check valve 23; After hydraulic oil pump 3 work stop (parking), when hydraulic oil pump 3 is not worked, leak tightness is not poor, and check valve 23 can stop the pressure oil hydraulic return oil pump 3 in energy storage 2, causes hydraulic oil to be revealed.
As a kind of preferred technical scheme, an embodiment more of the present invention, hand change over valve comprises: the first hand change over valve 61 and the second hand change over valve 62.
As a kind of preferred technical scheme, another embodiment of the present invention, the first hand change over valve 61 and the second hand change over valve 62 actions are synchronous.
Hand change over valve can be an integral type hand change over valve, can be also two hand change over valves of synchronization action, and in the present invention, hand change over valve comprises: the first hand change over valve 61 and the second hand change over valve 62.
As a kind of preferred technical scheme, another embodiment of the present invention, the first hand change over valve 61 is arranged between energy storage 2 and the first shuttle valve 51; The second hand change over valve 62 is arranged between pilot operated directional control valve 7 and starter motor 1; Anti-explosion is electromagnetic change-over valve 4 is connected with the first hand change over valve 61, the second hand change over valve 62 respectively.
As a kind of preferred technical scheme, an embodiment more of the present invention, also comprise the 3rd hand change over valve 10, one end of the 3rd hand change over valve 10 is connected with anti-explosion is electromagnetic change-over valve 4, the first hand change over valve 61 respectively, and the other end is connected with the first shuttle valve 51, hydraulic throttle actuator 8 and valve oil cylinder 9 respectively.
The present invention can realize that manual safety starts, can also realize auto shut down, and adopt domestic parts, cost is low, maintenance maintenance is convenient, can on domestic diesel oil single track loop wheel machine, use, also can be applicable to scope large for changing the relevant apparatus on import diesel oil single track loop wheel machine, can apply on a large scale.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a diesel oil single track loop wheel machine control setup, is characterized in that, comprising:
Starter motor (1);
Hydraulic throttle actuator (8);
Valve oil cylinder (9);
Energy storage (2), described energy storage (2) is connected with described starter motor (1) by pilot operated directional control valve (7), hand change over valve successively; Described energy storage (2) is connected with described hydraulic throttle actuator (8), described valve oil cylinder (9) respectively by hand change over valve, the first shuttle valve (51) successively;
Hydraulic oil pump (3), described hydraulic oil pump (3) is connected with described energy storage (2), described pilot operated directional control valve (7) respectively, between described hydraulic oil pump (3) and described pilot operated directional control valve (7), also is provided with the second shuttle valve (52);
Anti-explosion is electromagnetic change-over valve (4), described anti-explosion is electromagnetic change-over valve (4) is connected with described energy storage (2), the first shuttle valve (51), hand change over valve, pilot operated directional control valve (7) respectively.
2. a kind of diesel oil single track loop wheel machine control setup according to claim 1, it is characterized in that: also comprise controller (11), described controller (11) is connected with described anti-explosion is electromagnetic change-over valve (4).
3. a kind of diesel oil single track loop wheel machine control setup according to claim 2, it is characterized in that: described controller is provided with signal detector on (11).
4. a kind of diesel oil single track loop wheel machine control setup according to claim 1, it is characterized in that: also comprise check valve (23), described check valve (23) is arranged between described energy storage (2) and described hydraulic oil pump (3).
5. according to the described a kind of diesel oil single track loop wheel machine control setup of claim 1-4 any one, it is characterized in that: described hand change over valve comprises: the first hand change over valve (61) and the second hand change over valve (62).
6. a kind of diesel oil single track loop wheel machine control setup according to claim 5 is characterized in that: described the first hand change over valve (61) and the second hand change over valve (62) action are synchronous.
7. a kind of diesel oil single track loop wheel machine control setup according to claim 6 is characterized in that:
Described the first hand change over valve (61) is arranged between described energy storage (2) and described the first shuttle valve (51); Described the second hand change over valve (62) is arranged between described pilot operated directional control valve (7) and described starter motor (1); Described anti-explosion is electromagnetic change-over valve (4) is connected with described the first hand change over valve (61), the second hand change over valve (62) respectively.
8. a kind of diesel oil single track loop wheel machine control setup according to claim 7, it is characterized in that: also comprise the 3rd hand change over valve (10), one end of described the 3rd hand change over valve (10) is connected with described anti-explosion is electromagnetic change-over valve (4), described the first hand change over valve (61) respectively, and the other end is connected with the first shuttle valve (51), described hydraulic throttle actuator (8) and described valve oil cylinder (9) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310415969.0A CN103466451B (en) | 2013-09-12 | 2013-09-12 | Control device for diesel single-rail crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310415969.0A CN103466451B (en) | 2013-09-12 | 2013-09-12 | Control device for diesel single-rail crane |
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| CN103466451A true CN103466451A (en) | 2013-12-25 |
| CN103466451B CN103466451B (en) | 2015-07-22 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864133A (en) * | 2016-06-17 | 2016-08-17 | 沙尔夫矿山机械（徐州）有限公司 | Novel diesel engine monorail crane hydraulic system |
| CN108033406A (en) * | 2017-12-21 | 2018-05-15 | 刘剑 | Flame-out and the pallet fork linkage of fork truck |
| CN110630357A (en) * | 2019-11-05 | 2019-12-31 | 尤洛卡（山东）矿业科技有限公司 | Tail gas cooling and purifying water tank for explosion-proof diesel engine |
| CN111847249A (en) * | 2020-08-13 | 2020-10-30 | 沙尔夫矿山机械（徐州）有限公司 | Novel diesel engine monorail crane drive part realizes getting rid of hydraulic control system who drives function |
| CN115750473A (en) * | 2023-01-06 | 2023-03-07 | 徐州徐工基础工程机械有限公司 | Pressure maintaining and releasing control system and method for monorail crane energy accumulator |
| CN115805966A (en) * | 2022-11-18 | 2023-03-17 | 尤洛卡（山东）矿业科技有限公司 | New energy monorail crane power system and control method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3956891A (en) * | 1974-12-30 | 1976-05-18 | Allis-Chalmers Corporation | Closed center hydraulic system for lift trucks |
| JPS5495443A (en) * | 1978-01-12 | 1979-07-27 | Tadano Tekkosho:Kk | Circuit for accumulating oil pressure for operating clutch of winch of hydraulic crane |
| GB2240080A (en) * | 1990-01-12 | 1991-07-24 | Liebherr Werk Nenzing | Overload safety device for hydraulic winch of crane, preferably offshore crane |
| JPH0971977A (en) * | 1995-09-05 | 1997-03-18 | Hitachi Constr Mach Co Ltd | Control circuit for hydraulic motor |
| CN201507505U (en) * | 2009-09-23 | 2010-06-16 | 山东广富集团有限公司 | Hydraulic station electromotor intermittent starting booster unit |
| WO2012166520A2 (en) * | 2011-05-31 | 2012-12-06 | Caterpillar Inc. | Hydraulic fluid system |
| CN102874687A (en) * | 2012-09-19 | 2013-01-16 | 三一重工股份有限公司 | Crane and hydraulic control system for single cylinder telescopic mechanism thereof |
-
2013
- 2013-09-12 CN CN201310415969.0A patent/CN103466451B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3956891A (en) * | 1974-12-30 | 1976-05-18 | Allis-Chalmers Corporation | Closed center hydraulic system for lift trucks |
| JPS5495443A (en) * | 1978-01-12 | 1979-07-27 | Tadano Tekkosho:Kk | Circuit for accumulating oil pressure for operating clutch of winch of hydraulic crane |
| GB2240080A (en) * | 1990-01-12 | 1991-07-24 | Liebherr Werk Nenzing | Overload safety device for hydraulic winch of crane, preferably offshore crane |
| JPH0971977A (en) * | 1995-09-05 | 1997-03-18 | Hitachi Constr Mach Co Ltd | Control circuit for hydraulic motor |
| CN201507505U (en) * | 2009-09-23 | 2010-06-16 | 山东广富集团有限公司 | Hydraulic station electromotor intermittent starting booster unit |
| WO2012166520A2 (en) * | 2011-05-31 | 2012-12-06 | Caterpillar Inc. | Hydraulic fluid system |
| CN102874687A (en) * | 2012-09-19 | 2013-01-16 | 三一重工股份有限公司 | Crane and hydraulic control system for single cylinder telescopic mechanism thereof |
Non-Patent Citations (1)
| Title |
|---|
| 柳俊忻等: "蓄能器在履带车辆静液驱动系统中的应用特性研究", 《机床与液压》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864133A (en) * | 2016-06-17 | 2016-08-17 | 沙尔夫矿山机械（徐州）有限公司 | Novel diesel engine monorail crane hydraulic system |
| CN105864133B (en) * | 2016-06-17 | 2019-03-26 | 沙尔夫矿山机械（徐州）有限公司 | A kind of diesel engine monorail crane hydraulic system |
| CN108033406A (en) * | 2017-12-21 | 2018-05-15 | 刘剑 | Flame-out and the pallet fork linkage of fork truck |
| CN108033406B (en) * | 2017-12-21 | 2019-05-10 | 山东齐鲁合力叉车有限公司 | Flame-out and the pallet fork linkage of fork truck |
| CN110630357A (en) * | 2019-11-05 | 2019-12-31 | 尤洛卡（山东）矿业科技有限公司 | Tail gas cooling and purifying water tank for explosion-proof diesel engine |
| CN110630357B (en) * | 2019-11-05 | 2021-10-08 | 尤洛卡（山东）矿业科技有限公司 | Tail gas cooling and purifying water tank for explosion-proof diesel engine |
| CN111847249A (en) * | 2020-08-13 | 2020-10-30 | 沙尔夫矿山机械（徐州）有限公司 | Novel diesel engine monorail crane drive part realizes getting rid of hydraulic control system who drives function |
| CN115805966A (en) * | 2022-11-18 | 2023-03-17 | 尤洛卡（山东）矿业科技有限公司 | New energy monorail crane power system and control method thereof |
| CN115805966B (en) * | 2022-11-18 | 2023-09-08 | 尤洛卡（山东）矿业科技有限公司 | New energy monorail crane vehicle power system and control method |
| CN115750473A (en) * | 2023-01-06 | 2023-03-07 | 徐州徐工基础工程机械有限公司 | Pressure maintaining and releasing control system and method for monorail crane energy accumulator |
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| CN103466451B (en) | 2015-07-22 |
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