CN103148053A - Stroke control energy-saving buffering method of pumping oil cylinder used for concrete pump - Google Patents
Stroke control energy-saving buffering method of pumping oil cylinder used for concrete pump Download PDFInfo
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- CN103148053A CN103148053A CN2013100677756A CN201310067775A CN103148053A CN 103148053 A CN103148053 A CN 103148053A CN 2013100677756 A CN2013100677756 A CN 2013100677756A CN 201310067775 A CN201310067775 A CN 201310067775A CN 103148053 A CN103148053 A CN 103148053A
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Abstract
The invention discloses a stroke control energy-saving buffering method of a pumping oil cylinder used for a concrete pump. The method is realized by two variable restricted valves mounted on a piston 3 and controlled by a stroke. When the piston 3 is at an original position and an ending position, two ends of the piston 3 are communicated by a larger throttling opening in a stroke spacing manner to meet the demand for overflowing of large excessive flow and reduce pressure impact; with the movement of the piston 3, the throttling opening is gradually turned down to meet the demand for continuous flow increase by continuously accelerated piston 3; and in this way, the present energy-saving buffering method that a fixed throttling opening is crossed over two ends of the piston is changed into a variable throttling energy-saving buffering method controlled by displacement that a variable throttling opening is crossed over two ends of the piston 3. The pumping oil cylinder is structurally composed of a cylinder barrel 1, a screw cap 2, a piston 3, a restricted valve core 4, a spring 5, a spring seat 6, a piston rod 7, a restricted valve core 8, a spring 9 and a spring seat 10, and solves the problem that welding deformation of a hydraulic fluid port at the middle part of a hydraulic cylinder affects the quality and service life of the pumping oil cylinder.
Description
One, technical field:
The present invention relates to a kind of concrete pump energy-conservation buffer method of Stroke Control of pumping oil cylinder.
Two, background technique:
Along with the penetration and promotion of Chinese commodity concrete and mandatory employing, the extensive popularization and application of various concrete pumping equipments.
In all kinds of concrete pumping equipments, the startup impact of concrete pumping hydraulic jack and reversing impact have brought very large hydraulic shock to main frame, have caused vibrations and the noise of main frame; Hydraulic shock causes the unnecessary consumption of energy, makes the rapid intensification of host hydraulic system, and then has reduced the viscosity of hydraulic work system medium, and the volumetric efficiency of system descends.
High-frequency vibration destroys the structural strength of main frame, and it is especially harmful for the concrete mixer that longer elastic arm shelf structure is arranged; Noise is welding and the more fatiguability that makes operator.
Produce the reason that this impact has its large quality load high-acceleration commutation, the reason of each equipment cooperation of main frame is arranged, also have in hydraulic system each major control element in the reason of its dynamic response transient process Proper Match.For these reasons, people have carried out a large amount of research and discussion, yet these and host work character are inherent, make people want to take effect very little by the effort that this impact and energy consumption are improved or alleviated to more rational coupling.Helpless, people have to be slowed down at the initial bit of concrete pumping hydraulic jack and the stop bit throttling passage by the cross-over connection piston, and alleviate its reversing impact and noise.Although this method has been brought into play limited effect to a certain extent, but, with the fixed orifice of fixed range cross-over connection piston can't the automatic sensing piston acceleration and the variation of pressure reduction, be all from start to finish to deal with the acceleration at piston two ends and the variation of pressure reduction with fixing cross-over connection distance and fixing throttle hole area, it can only reduce the hydraulic shock of a part of system to have sacrificed speed of response and efficient as cost.
In addition, two of must pass through of piston have seriously affected again quality and the working lifes of pumping oil cylinder by the hydraulic fluid port welding procedure in the middle of hydraulic jack and distortion.
Three, summary of the invention:
Purpose of the present invention will be developed a kind of excellent performance exactly, the concrete pump of process, the responding fast energy-conservation way to play for time of Stroke Control of hydraulic pumping oil cylinder.
The concrete pump of the present invention energy-conservation buffer method of Stroke Control of pumping oil cylinder, to be realized by two variable throttle valve of being controlled by stroke that are contained on piston 3: when piston 3 at initial bit and stop bit, mode by stroke limit makes piston 3 two ends be communicated with larger throttle orifice, satisfy overflowing of unnecessary flow larger when starting to walk, reduce compression shock; And along with the movable joint head piece of piston 3 progressively turns down, satisfy piston 3 and constantly accelerate the continuous demand that increases of flow.
Like this, just will become with the energy-conservation buffering at fixed throttle port cross-over connection piston two ends the energy-conservation buffering of variable restrictor of controlling with displacement with settable orifice cross-over connection piston 3 two ends in prior art.Its structure is by cylinder barrel 1, nut 2, and piston 3, throttling valve core 4, spring 5, spring seat 6, piston rod 7, throttling valve core 8, spring 9 and spring seat 10 are formed by combining; It is characterized in that: with piston 3, throttling valve core 4, spring 5, the variable throttle valve that spring seat 6 forms is to open the top that is contained in piston 3 towards the rod chamber direction; With piston 3, throttling valve core 8, spring 9, the variable throttle valve that spring seat 10 forms is to open the bottom that is contained in piston 3 towards the rodless cavity direction.Throttling valve core 4 and throttling valve core 8 are all stretched out 3 one sections, piston, and its length adds the variable restrictor stroke by the physical dimension of oil cylinder and decides.It is that displacement by piston 3 determines that the thrust that the spring force of spring 5 and spring 9 produces greater than throttling valve core 4 and throttling valve core 8 two ends Maximum differential pressures respectively, the displacement of throttling valve core 4 and throttling valve core 8 are controlled;
its working principle is: when piston 3 is in the left end initial bit, the left end of throttling valve core 4 withstands on the interior edge face of oil cylinder seat, this moment, the aperture of throttling valve core 4 was maximum, main reversing valve commutates and supplies with pressure oil to the left chamber of piston 3, wish promotion concrete cylinder moves right and sends concrete, required flow is minimum, as long as the required pressure of a little higher than promotion concrete cylinder of pressure that restriction is set up, piston 3 will move right, and along with the movement of piston 3, throttling valve core 4 will turn down restriction thereupon under the effect of spring 5, reduce flooded traffic, both reached and reduced to impact, satisfy again the demand that oil cylinder improves rapidly speed.Before the concrete pumping hydraulic jack arrives stop bit, wish and progressively to slow down, the front end that is arranged on the throttling valve core 8 of piston 3 bottoms this moment can contact the end face of the guide sleeve of piston rod 7, promoting throttling valve core 8 progressively opens, the pressure oil in splitter section piston 3 left chambeies, piston 3 is slowed down, reduce the impact of hydraulic system.Otherwise, when the stop bit of this pumps hydraulic oil cylinder is reverse, be also like this.
the present invention is alleviated the way of its reversing impact and noise at initial bit and the stop bit of concrete pumping hydraulic jack relatively by the fixed restriction passage of cross-over connection piston, it is take the initial bit of piston 3 and its accelerating travel as control signal, deal with the concrete pumping hydraulic jack in the shunting of initial bit and the unnecessary flow of stop bit with the opening version of settable orifice, it can both guarantee the pressure requirement of pumps hydraulic oil cylinder required acceleration preferably, the unnecessary flow of gradient ground shunting can be arranged again, its control characteristic meets the requirement of main frame more, as long as the requirement that just can take into account the efficient of main frame and reduce impact reasonable in design.In addition, it has solved hydraulic fluid port welding procedure and distortion in the middle of hydraulic jack fully, and then seriously have influence on the pumping oil cylinder quality and working life problem, and restriction of the present invention is variable, the choke area change curve that changes can make its restriction characteristic be more suitable for the requirement of different main frames, thereby has higher efficient and less hydraulic shock and energy consumption.
Throttle valve of the present invention can individual component form be arranged on piston 3.
Four, description of drawings:
Accompanying drawing 1 is structure principle chart of the present invention.
Five, embodiment:
the specific embodiment of the present invention is: piston 3 is in the left end initial bit, the left end of throttling valve core 4 withstands on the interior edge face of oil cylinder seat, this moment, the aperture of throttling valve core 4 was maximum, when commutating, main reversing valve supplies with pressure oil to the left chamber of piston 3, wish promotion concrete cylinder moves right and sends concrete, required flow is minimum, as long as the pressure of a little higher than promotion concrete cylinder of pressure that restriction is set up, piston 3 will move right, and along with the movement of piston 3, throttling valve core 4 will turn down restriction thereupon under the effect of spring 5, reduce flooded traffic, both reached and reduced to impact, satisfy again oil cylinder improve rapidly speed demand.Before the concrete pumping hydraulic jack arrives stop bit, wish and progressively to slow down, the front end that is arranged on the throttling valve core 8 of piston 3 bottoms this moment can contact the end face of the guide sleeve of piston rod 7, promoting throttling valve core 8 progressively opens, the pressure oil in splitter section piston 3 left chambeies, piston 3 is slowed down, reduce the impact of hydraulic system.Otherwise, when the stop bit of this pumps hydraulic oil cylinder is reverse, be also like this.
Claims (2)
1. a concrete pump is with the energy-conservation buffer method of Stroke Control of pumping oil cylinder, be to be realized by two variable throttle valve of being controlled by stroke that are contained on piston (3): the mode by stroke limit makes piston (3) two ends be communicated with larger throttle orifice at initial bit and stop bit when piston (3), satisfy overflowing of unnecessary flow larger when starting to walk, reduce compression shock, and along with the movable joint head piece of piston (3) progressively turns down, satisfy piston (3) constantly to accelerate the continuous demand that increases of flow, its structure is by cylinder barrel (1), nut (2), and piston (3), throttling valve core (4), spring (5), spring seat (6), piston rod (7), throttling valve core (8), spring (9) and spring seat (10) are formed by combining, it is characterized in that: with piston (3), throttling valve core (4), spring (5), the variable throttle valve that spring seat (6) forms is to open the top that is contained in piston (3) towards the rod chamber direction, with piston (3), throttling valve core (8), spring (9), the variable throttle valve that spring seat (10) forms is to open the bottom that is contained in piston (3) towards the rodless cavity direction, throttling valve core (4) and throttling valve core (8) are all stretched out (3) one sections, piston, and its length adds the variable restrictor stroke by the physical dimension of oil cylinder and decides, it is by the displacement decision of piston (3) that the thrust that the spring force of spring (5) and spring (9) produces greater than throttling valve core (4) and throttling valve core (8) two ends Maximum differential pressure respectively, their displacement are controlled, its working principle is: when piston (3) is in the left end initial bit, the left end of throttling valve core (4) withstands on the interior edge face of oil cylinder seat, the aperture of throttling valve core this moment (4) is maximum, main reversing valve commutates and supplies with pressure oil to the left chamber of piston (3), wish promotion concrete cylinder moves right and sends concrete, required flow is minimum, as long as the pressure that restriction is set up is higher than promoting the required pressure of concrete cylinder, piston (3) will move right, and along with the movement of piston (3), throttling valve core (4) will turn down restriction thereupon under the effect of spring (5), reduce flooded traffic, both reached and reduced to impact, satisfy again the demand that oil cylinder improves rapidly speed, before the concrete pumping hydraulic jack arrives stop bit, wish and progressively to slow down, the front end that is arranged on the throttling valve core (8) of piston (3) bottom this moment can contact the end face of the guide sleeve of piston rod (7), promoting throttling valve core (8) progressively opens, the pressure oil in the left chamber of splitter section piston (3), piston (3) is slowed down, reduce the impact of hydraulic system, otherwise, when the stop bit of this pumps hydraulic oil cylinder is reverse, be also like this.
2. a kind of concrete pump according to claim 1 with the energy-conservation buffer method of Stroke Control of pumping oil cylinder, is characterized in that: two variable throttle valve are arranged on piston (3) in the mode of independent component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100677756A CN103148053A (en) | 2013-03-04 | 2013-03-04 | Stroke control energy-saving buffering method of pumping oil cylinder used for concrete pump |
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| CN2013100677756A CN103148053A (en) | 2013-03-04 | 2013-03-04 | Stroke control energy-saving buffering method of pumping oil cylinder used for concrete pump |
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| CN103148053A true CN103148053A (en) | 2013-06-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759002A (en) * | 2013-12-31 | 2014-04-30 | 中冶海水淡化投资有限公司 | Water hydraulic cylinder piston with safety device |
| CN112112861A (en) * | 2020-09-17 | 2020-12-22 | 徐州徐工液压件有限公司 | Two-way balanced double-acting buffering device for hydraulic cylinder piston |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3013381A1 (en) * | 1980-04-05 | 1981-10-08 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Power-assisted steering system ram - has cut=off valves in piston connecting pressure chambers with return connection |
| EP0870931A1 (en) * | 1997-04-10 | 1998-10-14 | Bümach Engineering International B.V. | Actuator with end-of-stroke-cushioning |
| US6186043B1 (en) * | 1999-04-05 | 2001-02-13 | Deere & Company | Cushion hydraulic cylinder |
| EP1435461A1 (en) * | 2002-12-30 | 2004-07-07 | Bosch Rexroth Teknik AB | Pneumatic cylinder with cushioning means |
| CN201636119U (en) * | 2010-03-08 | 2010-11-17 | 广东科达机电股份有限公司 | Novel oil cylinder |
| CN102141058A (en) * | 2010-01-29 | 2011-08-03 | 施塔比鲁斯有限责任公司 | Piston-cylinder assembly |
| CN102434532A (en) * | 2011-12-16 | 2012-05-02 | 江苏新瑞重工科技有限公司 | Mechanical throttle buffering structure for hydraulic cylinder |
| CN202673868U (en) * | 2012-06-04 | 2013-01-16 | 重庆迪马工业有限责任公司 | Bidirectional buffer piston structure of hydraulic cylinder and bidirectional buffer hydraulic cylinder |
| CN202718955U (en) * | 2012-07-25 | 2013-02-06 | 浙江华昌液压机械有限公司 | Buffering oil cylinder |
-
2013
- 2013-03-04 CN CN2013100677756A patent/CN103148053A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3013381A1 (en) * | 1980-04-05 | 1981-10-08 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Power-assisted steering system ram - has cut=off valves in piston connecting pressure chambers with return connection |
| EP0870931A1 (en) * | 1997-04-10 | 1998-10-14 | Bümach Engineering International B.V. | Actuator with end-of-stroke-cushioning |
| US6186043B1 (en) * | 1999-04-05 | 2001-02-13 | Deere & Company | Cushion hydraulic cylinder |
| EP1435461A1 (en) * | 2002-12-30 | 2004-07-07 | Bosch Rexroth Teknik AB | Pneumatic cylinder with cushioning means |
| CN102141058A (en) * | 2010-01-29 | 2011-08-03 | 施塔比鲁斯有限责任公司 | Piston-cylinder assembly |
| CN201636119U (en) * | 2010-03-08 | 2010-11-17 | 广东科达机电股份有限公司 | Novel oil cylinder |
| CN102434532A (en) * | 2011-12-16 | 2012-05-02 | 江苏新瑞重工科技有限公司 | Mechanical throttle buffering structure for hydraulic cylinder |
| CN202673868U (en) * | 2012-06-04 | 2013-01-16 | 重庆迪马工业有限责任公司 | Bidirectional buffer piston structure of hydraulic cylinder and bidirectional buffer hydraulic cylinder |
| CN202718955U (en) * | 2012-07-25 | 2013-02-06 | 浙江华昌液压机械有限公司 | Buffering oil cylinder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759002A (en) * | 2013-12-31 | 2014-04-30 | 中冶海水淡化投资有限公司 | Water hydraulic cylinder piston with safety device |
| CN103759002B (en) * | 2013-12-31 | 2016-07-06 | 中冶海水淡化投资有限公司 | The fool proof water hydraulic cylinder piston of a kind of band |
| CN112112861A (en) * | 2020-09-17 | 2020-12-22 | 徐州徐工液压件有限公司 | Two-way balanced double-acting buffering device for hydraulic cylinder piston |
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Application publication date: 20130612 |