CN203230670U - Stroke control energy-saving cushion valve for pumping oil cylinder for concrete pump - Google Patents
Stroke control energy-saving cushion valve for pumping oil cylinder for concrete pump Download PDFInfo
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- CN203230670U CN203230670U CN 201320096332 CN201320096332U CN203230670U CN 203230670 U CN203230670 U CN 203230670U CN 201320096332 CN201320096332 CN 201320096332 CN 201320096332 U CN201320096332 U CN 201320096332U CN 203230670 U CN203230670 U CN 203230670U
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- oil cylinder
- throttling valve
- valve core
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Abstract
A stroke control energy-saving cushion valve for a pumping oil cylinder for a concrete pump is structurally composed of a cylinder barrel (1), a nut (2), a piston (3), a first throttling valve core (4), a first spring (5), a first spring seat (6), a piston rod (7), a second throttling valve core (8), a second spring (9) and a second spring seat (10). The stroke control energy-saving cushion valve is characterized in that a variable throttling valve composed of the piston (3), the first throttling valve core (4), the first spring (5) and the first spring seat (6) is opened towards the direction of a cavity with a rod and arranged on the upper portion of the piston (3). A variable throttling valve composed of the piston (3), the second throttling valve core (8), the second spring (9) and the second spring seat (10) is opened towards the direction of a cavity without a rod and arranged on the lower portion of the piston (3). The problem that the quality and the service life of the pumping oil cylinder are affected due to hydraulic fluid port welding deformation in the middle of the hydraulic oil cylinder is solved.
Description
One, technical field:
The present invention relates to a kind of concrete pump energy-conservation trimmer valve 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 big 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 then destroys environment and makes operator's more fatiguability.
Produce the reason that this impact has its big quality load high-acceleration commutation, the reason of each equipment cooperation of main frame is arranged, also have the reason that each major control element rationally mates in its dynamic response transient process in the hydraulic system.At these reasons, people have carried out a large amount of research and discussion, yet these and host work character are inherent, make that 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.Though this method has been brought into play limited effect to a certain extent, but, with the acceleration of perception piston and the variation of pressure reduction automatically of the fixed orifice of fixed range cross-over connection piston, from start to finish all be the variation of dealing with acceleration and the pressure reduction at piston two ends with fixing cross-over connection distance and fixing throttle hole area, it can only be the hydraulic shock that cost has reduced a part of system to have sacrificed speed of response and efficient.
In addition, two of must pass through of piston have seriously influenced quality and the working lifes of pumping oil cylinder again by the hydraulic fluid port welding procedure in the middle of the hydraulic jack and distortion.
Three, summary of the invention:
Purpose of the present invention will be developed a kind of excellent performance exactly, the energy-conservation trimmer valve of Stroke Control that technology is reliable, the concrete pump of responding fast is used hydraulic pressure pumping oil cylinder.
The concrete pump of the present invention energy-conservation trimmer valve 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 the piston 3: when piston 3 at initial bit and stop bit, mode by stroke limit makes piston 3 two ends be communicated with bigger throttle orifice, satisfy overflowing of unnecessary flow bigger when starting to walk, reduce compression shock; And along with the mobile restriction of piston 3 progressively turns down, satisfy piston 3 and constantly accelerate the continuous demand that increases of flow.
Like this, just the energy-conservation buffering with fixed throttle port cross-over connection piston two ends in the prior art has been become with the variable restrictor energy-conservation buffering of settable orifice cross-over connection piston 3 two ends with displacement control.Its structure is by cylinder barrel 1, nut 2, and piston 3, first throttle spool 4, the first springs 5, the first spring seats 6, piston rod 7, second throttling valve core 8, second spring 9 and second spring seat 10 combine; It is characterized in that: with piston 3, the variable throttle valve that first throttle spool 4, the first springs 5, the first spring seats 6 are formed is to open the top that is contained in piston 3 towards the rod chamber direction; The variable throttle valve of forming with piston 3, the second throttling valve core 8, the second springs 9, the second spring seats 10 is to open the bottom that is contained in piston 3 towards the rodless cavity direction.First throttle spool 4 and second throttling valve core 8 are all stretched out 3 one sections in piston,
Its length adds the variable restrictor stroke by the physical dimension of oil cylinder and decides.The thrust that the spring force of first spring 5 and second spring 9 produces greater than first throttle spool 4 and second throttling valve core, 8 two ends Maximum differential pressures respectively, the displacement control of first throttle spool 4 and second throttling valve core 8 are that the displacement by piston 3 determines.
The present invention is alleviated 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 way, it is to be control signal with the initial bit of piston 3 and its accelerating travel, 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, shunting unnecessary flow in gradient ground 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 the 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 littler hydraulic shock and energy consumption.
Throttle valve of the present invention can individual component form be installed on the 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 first throttle spool 4 withstands on the interior edge face of oil cylinder seat, this moment throttling valve core 4 the aperture maximum, when main reversing valve commutates to the left chamber supply pressure oil of piston 3, desire 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, first throttle spool 4 will turn down restriction thereupon under the effect of first spring 5, reduces flooded traffic, both reached and reduce 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 installed in second throttling valve core 8 of piston 3 bottoms this moment can contact the end face of the guide sleeve of piston rod 7, promoting second 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, also be like this.
Claims (1)
1.
A kind of concrete pump energy-conservation trimmer valve of Stroke Control of pumping oil cylinder, its structure is by cylinder barrel (1), nut (2), piston (3), first throttle spool (4), first spring (5), first spring seat (6), piston rod (7), second throttling valve core (8), second spring (9) and second spring seat (10) combine; It is characterized in that: with piston (3), first throttle spool (4), first spring (5), the variable throttle valve that first spring seat (6) is formed is to open the top that is contained in piston (3) towards the rod chamber direction; With piston (3), second throttling valve core (8), second spring (9), the variable throttle valve that second spring seat (10) is formed is to open the bottom that is contained in piston (3) towards the rodless cavity direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320096332 CN203230670U (en) | 2013-03-04 | 2013-03-04 | Stroke control energy-saving cushion valve for pumping oil cylinder for concrete pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320096332 CN203230670U (en) | 2013-03-04 | 2013-03-04 | Stroke control energy-saving cushion valve for pumping oil cylinder for concrete pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203230670U true CN203230670U (en) | 2013-10-09 |
Family
ID=49286798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320096332 Expired - Fee Related CN203230670U (en) | 2013-03-04 | 2013-03-04 | Stroke control energy-saving cushion valve for pumping oil cylinder for concrete pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203230670U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925259A (en) * | 2014-05-08 | 2014-07-16 | 四川工程职业技术学院 | Hydraulic-pneumatic cylinder piston |
| CN104895854A (en) * | 2015-05-27 | 2015-09-09 | 深圳市优美环境治理有限公司 | Pressure cylinder |
-
2013
- 2013-03-04 CN CN 201320096332 patent/CN203230670U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925259A (en) * | 2014-05-08 | 2014-07-16 | 四川工程职业技术学院 | Hydraulic-pneumatic cylinder piston |
| CN103925259B (en) * | 2014-05-08 | 2016-03-23 | 四川工程职业技术学院 | A kind of liquid gas pressure cylinder piston |
| CN104895854A (en) * | 2015-05-27 | 2015-09-09 | 深圳市优美环境治理有限公司 | Pressure cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20140304 |