CN102745611A - Hydraulic variable amplitude damping device of offshore crane - Google Patents
Hydraulic variable amplitude damping device of offshore crane Download PDFInfo
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- CN102745611A CN102745611A CN2012102473231A CN201210247323A CN102745611A CN 102745611 A CN102745611 A CN 102745611A CN 2012102473231 A CN2012102473231 A CN 2012102473231A CN 201210247323 A CN201210247323 A CN 201210247323A CN 102745611 A CN102745611 A CN 102745611A
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Abstract
The invention discloses a hydraulic variable amplitude damping device of an offshore crane. The hydraulic variable amplitude damping device comprises a throttle valve and a damper, wherein the cavity of the throttle valve is provided with a piston rod and radial ports a and b, the port a is communicated with one outlet of a hydraulic servo change valve, the port b is communicated with the other outlet of the hydraulic servo change valve through a hydraulic motor, and the inlet end of the hydraulic servo change valve is communicated with a main hydraulic source; the buffer rod at the cavity of the damper is connected with the piston rod; a stroke check block of the outer end head of the buffer rod is arranged in the way of corresponding to a contact pressure connector of a stroke switch valve, the outlet of the stroke switch valve is communicated with a pilot oil path at one end of the hydraulic servo change valve, and the inlet of the stroke switch valve is communicated with the outlet X1 of a hydraulic operation handle control valve; and the pilot oil path at the other end of the hydraulic servo change valve is communicated with the outlet X2 of the hydraulic operation handle control valve, and the inlet of the hydraulic operation handle control valve is communicated with the hydraulic source of the control system. The device can limit the impact of a damping boom to a gantry.
Description
Technical field
The invention belongs to the offshore platform equipment technical field, relate to a kind of hydraulic luffing shock absorber of platform loop wheel machine.
Background technology
The rope luffing Platform lifting devices is to rotate the retractable steel rope through span winch, to increase or to reduce the arm elevation angle.Loop wheel machine work the time is set with minimum and maximum operating angle, in these two angle positions limit switch is installed, when the arm luffing during to these two positions the triggering hydraulic efficiency pressure system make loop wheel machine stop luffing.The work under bad environment of Platform lifting devices, stormy waves is big, and the load change amplitude is big, at the burst strong wind or when unloading suddenly, possibly cause that the arm elevation angle is excessive.Because limit switch frequently uses, cause component wear in addition, spacing inefficacy causes the arm elevation angle excessive, and loop wheel machine is tumbled backward, leads to a disaster.
Existing arm shock absorber can only impact play buffer action, and luffing is stopped, if the operator fails in time to stop luffing or faulty operation occurs, can cause great damage to loop wheel machine.
Summary of the invention
The hydraulic luffing shock absorber that the purpose of this invention is to provide a kind of platform loop wheel machine has solved and has had the spacing inefficacy of arm in the prior art, can not in time stop luffing; The problem that faulty operation can cause damage to loop wheel machine perhaps appears.
The technical scheme that the present invention adopted is; A kind of hydraulic luffing shock absorber of platform loop wheel machine; The head of the arm of Platform lifting devices connects with span winch through steel rope mutually, and span winch and HM Hydraulic Motor are in transmission connection, and the hydraulic luffing shock absorber is installed on the door frame of Platform lifting devices; And towards arm one side
Described hydraulic luffing shock absorber structure is; Comprise one bonded assembly flow regulating valve and energy disperser, be provided with piston rod in the axial cavity of flow regulating valve, this axial cavity has a mouth and b mouth radially; The a mouth of flow regulating valve directly exports UNICOM with of hydraulic servo change-over valve; The oil circuit interface UNICOM of the b mouth of flow regulating valve and HM Hydraulic Motor, another outlet UNICOM of another oil circuit interface of HM Hydraulic Motor and hydraulic servo change-over valve, the input end of hydraulic servo change-over valve and main operating fluid potential source UNICOM; Be provided with a shock strut in the energy disperser, piston rod is that one is connected with shock strut, shock strut inner termination and between the inner chamber bottom of piston rod, be provided with a spring;
Described shock strut external end head is provided with stroke dog; Stroke dog and travel switch valve press the corresponding setting of joint; One end guide oil circuit UNICOM of the outlet of travel switch valve and hydraulic servo change-over valve, the X1 outlet UNICOM of import of travel switch valve and hydraulic operation handle control cock; The X2 outlet UNICOM of the other end guide oil circuit of hydraulic servo change-over valve and hydraulic operation handle control cock, the import of hydraulic operation handle control cock and the hydraulic power source UNICOM of control system.
The invention has the beneficial effects as follows, in the time of can making progress luffing in the angle that arm surpasses normal operation, the change angle of restriction arm, the buffering arm is to the impact of door frame; In addition, even if the faulty operation luffing that makes progress occurs, span winch can not drive arm yet and rotate up, and has significantly improved the safety performance of loop wheel machine.
Description of drawings
Fig. 1 is the installation site scheme drawing of hydraulic luffing shock absorber of the present invention on loop wheel machine;
Fig. 2 is the hydraulic schematic diagram of hydraulic luffing shock absorber of the present invention.
Among the figure, 1. energy disperser, 2. flow regulating valve, 3. stroke dog, 4. travel switch valve, 5. hydraulic servo change-over valve, 6. HM Hydraulic Motor, 7. operating handle control cock, 8. hydraulic luffing shock absorber, 9. span winch, 10. arm, 11. shock struts, 12. piston rods.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is elaborated.
As shown in Figure 1, the head of the arm 10 of Platform lifting devices connects with span winch 9 through steel rope mutually, and span winch 9 is in transmission connection with HM Hydraulic Motor 6, and the one connection, and the retractable steel rope is realized arm 10 luffings during span winch 9 rotations; Hydraulic luffing shock absorber 8 of the present invention is installed on the door frame of Platform lifting devices, and towards arm 10 1 sides.
As shown in Figure 2; Hydraulic luffing shock absorber 8 structures of the present invention are; Comprise one bonded assembly flow regulating valve 2 and energy disperser 1, be provided with piston rod 12 in the axial cavity of flow regulating valve 2, this axial cavity has a mouth and b mouth radially; The a mouth of flow regulating valve 2 directly exports UNICOM with of hydraulic servo change-over valve 5; The oil circuit interface UNICOM of the b mouth of flow regulating valve 2 and HM Hydraulic Motor 6, another outlet UNICOM of another oil circuit interface of HM Hydraulic Motor 6 and hydraulic servo change-over valve 5, the input end of hydraulic servo change-over valve 5 and main operating fluid potential source P UNICOM; The piston rod 12 of flow regulating valve 2 can shelter from a mouth and b mouth when moving axially, change the flow area of hydraulic fluid port a mouth and b mouth; Be provided with a shock strut 11 in the energy disperser 1, piston rod 12 is that one is connected with shock strut 11, shock strut 11 inner termination of energy disperser 1 inner chamber and between the inner chamber bottom of piston rod 12, be provided with a spring; These shock strut 11 external end heads are provided with stroke dog 3; Stroke dog 3 and travel switch valve 4 press the corresponding setting of joint stroke as required; Travel switch valve 4 oil return lines and hydraulic reservoir UNICOM; One end guide oil circuit UNICOM of the outlet of travel switch valve 4 and hydraulic servo change-over valve 5, the X1 outlet UNICOM of 4 imports of travel switch valve and hydraulic operation handle control cock 7; The X2 outlet UNICOM of the other end guide oil circuit of hydraulic servo change-over valve 5 and hydraulic operation handle control cock 7; The hydraulic power source P1 UNICOM of the import of hydraulic operation handle control cock 7 and control system, the T mouth of the T mouth of hydraulic servo change-over valve 5 and hydraulic operation handle control cock 7 all with hydraulic reservoir UNICOM.
Because hydraulic efficiency pressure system is complicated, the simple hydraulic pressure annexation of bonded assembly scheme drawing between the flow regulating valve 2 that only draws among the figure, hydraulic operation handle control cock 7, travel switch valve 4, hydraulic servo change-over valve 5 and the HM Hydraulic Motor 6.
The principle of work of apparatus of the present invention is: when the operator with hydraulic operation handle control cock 7 towards " rising " when direction is pulled; The hydraulic power source P1 of control system is through fuel-displaced through the X1 outlet after reducing pressure, and hydraulic oil is through the left end of travel switch valve 4 entering hydraulic servo change-over valves 5 guide's hydraulic fluid ports, and it is open-minded to promote hydraulic servo change-over valve 5 left ends; Main then operating fluid potential source P is through hydraulic servo change-over valve 5 and through a mouth and b mouth in the flow regulating valve 2; Give HM Hydraulic Motor 6 fuel feeding, then HM Hydraulic Motor 6 drives span winch 9 and upwards receives rope, arm 10 left-hand revolutions; When arm 10 turned to the position of design code, hydraulic luffing shock absorber 8 came in contact with arm.Under the situation of existing apparatus, if the operator does not have shut-down operation hydraulic operation handle control cock 7, the pressure oil P of main hydraulic system continues to HM Hydraulic Motor 6 fuel feeding, and arm 10 is rotated further.In apparatus of the present invention operation; Because flow regulating valve 2 links to each other with energy disperser 1, after shock strut 11 pressurizeds drove piston rod 12 retractions, a mouth in the flow regulating valve 2 and the aperture area of b mouth can diminish; Flow through a mouth and b mouth can diminish; HM Hydraulic Motor 6 rotating speeds diminish thereupon automatically, and it is many more that shock strut 11 pressurizeds bounce back, and the speed of HM Hydraulic Motor 6 can be more little.Behind the desired location that piston rod 12 reaches capacity; A mouth and b mouth are all shut, and stroke dog 3 triggers 4 actions of travel switch valve, and travel switch valve 4 thoroughly cuts out; Cut off the left end fuel feeding of hydraulic servo change-over valve 5; The left end pressure release of hydraulic servo change-over valve 5 at this moment, hydraulic servo change-over valve 5 is got back to meta, and HM Hydraulic Motor 6 stops operating.Continue toward " rising " when pull the position when operating hydraulic operation handle control cock 7, span winch 9 can not drive arm 10 left-hand revolutions yet, can not damage loop wheel machine even if guaranteed misoperation so yet.
When with hydraulic operation handle control cock 7 to " decline " when direction is pulled; The hydraulic power source P1 process decompression of control system is after the fuel-displaced right-hand member guide hydraulic fluid port that leads to hydraulic servo change-over valve 5 of X2 outlet; Hydraulic efficiency servo-valve 5 switching-overs; Hydraulic servo change-over valve 5 right-hand members are through hydraulic oil, and the pressure oil P of main hydraulic system drives HM Hydraulic Motor 6 contrarotations, and span winch 9 is transferred arm 10.
When limes superiors position not at arm, operation hydraulic operation handle control cock 7, no matter toward " rising " or " decline " when pull the position, HM Hydraulic Motor 6 all can normal operation.
The hydraulic luffing shock absorber of platform loop wheel machine of the present invention, through flow regulating valve 2 and energy disperser 1 are set, its restriction can change along with the degree that presses down, and has significantly reduced the impact of arm to loop wheel machine.When shock absorber was compressed to the end position of setting, stroke dog triggered travel switch valve 4, thereby stops automatically to the HM Hydraulic Motor fuel feeding, and luffing stops.In any case operation this moment all can not make arm continue upwards luffing, to operate downward luffing arm, has effectively avoided the generation of the caused loop wheel machine damage accident of maloperation only.
Claims (2)
1. the hydraulic luffing shock absorber of a platform loop wheel machine, the head of the arm of Platform lifting devices (10) connects with span winch (9) through steel rope mutually, and span winch (9) and HM Hydraulic Motor (6) are in transmission connection, and it is characterized in that:
Hydraulic luffing shock absorber (8) is installed on the door frame of Platform lifting devices, and towards arm (10) one sides,
Described hydraulic luffing shock absorber (8) structure is; Comprise one bonded assembly flow regulating valve (2) and energy disperser (1); Be provided with piston rod (12) in the axial cavity of flow regulating valve (2); This axial cavity has b mouth and a mouth radially, and a mouth of flow regulating valve (2) directly exports UNICOM, the oil circuit interface UNICOM of the b mouth of flow regulating valve (2) and HM Hydraulic Motor (6) with of hydraulic servo change-over valve (5); Another outlet UNICOM of another oil circuit interface of HM Hydraulic Motor (6) and hydraulic servo change-over valve (5), the input end of hydraulic servo change-over valve (5) and main operating fluid potential source UNICOM; Be provided with a shock strut (11) in the energy disperser (1), piston rod (12) is that one is connected with shock strut (11), shock strut (11) inner termination and between the inner chamber bottom of piston rod (12), be provided with a spring;
Described shock strut (11) external end head is provided with stroke dog (3); Stroke dog (3) and travel switch valve (4) press the corresponding setting of joint stroke as required; One end guide oil circuit UNICOM of the outlet of travel switch valve (4) and hydraulic servo change-over valve (5), the X1 outlet UNICOM of (4) import of travel switch valve and hydraulic operation handle control cock (7); The X2 outlet UNICOM of the other end guide oil circuit of hydraulic servo change-over valve (5) and hydraulic operation handle control cock (7), the import of hydraulic operation handle control cock (7) and the hydraulic power source UNICOM of control system.
2. the hydraulic luffing shock absorber of platform loop wheel machine according to claim 1; It is characterized in that: the oil return line of described travel switch valve (4) and hydraulic reservoir UNICOM, the T mouth of the T mouth of described hydraulic servo change-over valve (5) and hydraulic operation handle control cock (7) all with hydraulic reservoir UNICOM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210247323.1A CN102745611B (en) | 2012-07-17 | 2012-07-17 | Hydraulic variable amplitude damping device of offshore crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210247323.1A CN102745611B (en) | 2012-07-17 | 2012-07-17 | Hydraulic variable amplitude damping device of offshore crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102745611A true CN102745611A (en) | 2012-10-24 |
| CN102745611B CN102745611B (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210247323.1A Expired - Fee Related CN102745611B (en) | 2012-07-17 | 2012-07-17 | Hydraulic variable amplitude damping device of offshore crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106429900A (en) * | 2016-11-08 | 2017-02-22 | 芜湖市长江起重设备制造有限公司 | Lifting overturning buffering mechanism capable of realizing stable lifting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1111881A (en) * | 1997-06-23 | 1999-01-19 | Kobe Steel Ltd | Boom hoisting controlling method and device for tower crane |
| JP2005053641A (en) * | 2003-08-04 | 2005-03-03 | Shin Kurushima Dockyard Co Ltd | Derrick type loading device |
| CN102275841A (en) * | 2011-06-15 | 2011-12-14 | 长沙中联重工科技发展股份有限公司 | Anti-back tilting buffer device for arm support |
| CN102502433A (en) * | 2011-10-08 | 2012-06-20 | 武汉船用机械有限责任公司 | Variable amplitude hydraulic system of dual-oil-cylinder variable amplitude crane |
-
2012
- 2012-07-17 CN CN201210247323.1A patent/CN102745611B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1111881A (en) * | 1997-06-23 | 1999-01-19 | Kobe Steel Ltd | Boom hoisting controlling method and device for tower crane |
| JP2005053641A (en) * | 2003-08-04 | 2005-03-03 | Shin Kurushima Dockyard Co Ltd | Derrick type loading device |
| CN102275841A (en) * | 2011-06-15 | 2011-12-14 | 长沙中联重工科技发展股份有限公司 | Anti-back tilting buffer device for arm support |
| CN102502433A (en) * | 2011-10-08 | 2012-06-20 | 武汉船用机械有限责任公司 | Variable amplitude hydraulic system of dual-oil-cylinder variable amplitude crane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106429900A (en) * | 2016-11-08 | 2017-02-22 | 芜湖市长江起重设备制造有限公司 | Lifting overturning buffering mechanism capable of realizing stable lifting |
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| Publication number | Publication date |
|---|---|
| CN102745611B (en) | 2014-10-01 |
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Granted publication date: 20141001 Termination date: 20170717 |