CN103759002A - Water hydraulic cylinder piston with safety device - Google Patents
Water hydraulic cylinder piston with safety device Download PDFInfo
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- CN103759002A CN103759002A CN201310750566.1A CN201310750566A CN103759002A CN 103759002 A CN103759002 A CN 103759002A CN 201310750566 A CN201310750566 A CN 201310750566A CN 103759002 A CN103759002 A CN 103759002A
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- hydraulic cylinder
- cylinder piston
- fool proof
- water hydraulic
- end cap
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Abstract
The invention discloses a water hydraulic cylinder piston with a safety device. The water hydraulic cylinder piston comprises a horizontally-arranged water hydraulic cylinder piston pipe body, two blocking plates bilaterally and symmetrically arranged inside the water hydraulic cylinder piston pipe body, a plurality of positioning pipes located inside the water hydraulic cylinder piston pipe body, evenly distributed on the periphery and horizontally arranged between the blocking plates, vertically-arranged valves plates located inside the water hydraulic cylinder piston pipe body, close to the seal blocking plate and penetrating the corresponding ends of the positioning pipes, and a plurality of sensing blocks located at the positions on the outer side of the middle of the water hydraulic cylinder piston pipe body, wherein one blocking plate is a seal blocking plate, the other blocking plate is a non-seal blocking plate. The water hydraulic cylinder piston with the safety device can overcome the defects of low reliability, poor safety and the like in the prior art and accordingly has the advantages of high reliability and good safety.
Description
Technical field
The present invention relates to piston technical field, particularly, relate to one and be with fool proof hydraulic cylinder piston.
Background technique
At present, conventional hydraulic cylinder piston only can accomplish to reduce mixing of energy recycle device mesohigh brine and the former seawater of low pressure, and by the operation of its running position control switch.
At present, reverse osmosis seawater desalting is one of mainstream technology of desalination of sea water, for overcoming the osmotic pressure of water, reverse osmosis seawater desalting process need consume the intake pressure of a large amount of electric energy lifting reverse osmosis membranes, and the brine overbottom pressure that reverse osmosis membrane is discharged is up to 5.5～6.5MPa, the recovery rate according to 42% is calculated, in the brine of discharge, also contain approximately 58% feed water pressure energy, in Seawater Desalination Project application, for reducing energy consumption and the water producing cost of reverse osmosis seawater desalting, can this part energy be reclaimed and become intake pressure energy by energy recycle device.
For the pressure energy recycling of counter-infiltration system high-pressure thick salt solution, energy recycle device need to be set in counter-infiltration system.
Work-exchange type energy recovery device comprises rotator type energy recycle device and the large class of hydraulic cylinder formula energy recycle device two, and wherein the core component of hydraulic cylinder formula energy recycle device comprises energy recovery switch and hydraulic cylinder two large divisions.In practical engineering application, from two strands of current of high-pressure thick salt solution and the former seawater of low pressure, will in hydraulic cylinder, converge mutually and carry out the exchange of pressure energy.
The built-in hydraulic cylinder piston of hydraulic cylinder, be used for separating the former seawater of low pressure and high-pressure thick salt solution, the first makes to reduce mixing of high-pressure thick salt solution and the former seawater of low pressure, and it two is by the operation of its running position control switch, and then changes high-pressure thick salt solution and enter the flow channel of hydraulic cylinder.
In practical engineering application, for guaranteeing the stable output of the former seawater of high pressure, need to ensure the high-pressure thick salt solution continuing to flow and enter hydraulic cylinder, prevent under emergency case simultaneously, hydraulic cylinder piston strikes rapidly on hydraulic cylinder end cap flange and makes hydraulic cylinder piston impaired, for this reason, need a hydraulic cylinder piston with security structure device.
Realizing in process of the present invention, inventor finds at least to exist in prior art the defects such as the low and poor stability of reliability.
Summary of the invention
The object of the invention is to, for the problems referred to above, propose one and be with fool proof hydraulic cylinder piston, to realize reliability height and the good advantage of Security.
For achieving the above object, the technical solution used in the present invention is: one is with fool proof hydraulic cylinder piston, comprise horizontally disposed hydraulic cylinder piston body, be symmetrical set two baffle plates in described hydraulic cylinder piston body inside, wherein one is that another piece of sealing baffle is non-tight baffle plate, all be positioned at described hydraulic cylinder piston body inside, and circumferentially uniform and be horizontally set on the several positioning pipes between two baffle plates, be positioned at described hydraulic cylinder piston body inside, near sealing baffle, and the valve plate vertically arranging through the respective end of positioning pipe, and be positioned at hydraulic cylinder piston body outer fix placed in the middle, circumferentially uniform several sensor blocks of inlaying.
Further, along each positioning pipe axially, in the periphery of each positioning pipe, be arranged with spring, one end of spring contacts with non-tight baffle plate, the other end contacts with valve plate.
Further, between described valve plate and sealing baffle, be provided with seal ring.
Further, between each positioning pipe and two baffle plates, be provided with fastening piece.
Further, described fastening piece comprises that coupling is connected to double-screw bolt and the nut between each positioning pipe and two baffle plates.
Further, described hydraulic pressure cylinder body, comprises horizontally disposed hydraulic cylinder, and is arranged on the hydraulic cylinder piston of described hydraulic cylinder inside.
Further, described hydraulic pressure cylinder body, also comprises with described hydraulic cylinder and mates the hydraulic cylinder end cap flange and the hydraulic cylinder end cap flange connecting pipe head that are connected.
Further, described hydraulic pressure cylinder body, also comprises the damping cavity between described hydraulic cylinder end cap flange and hydraulic cylinder piston.
Further, described two baffle plates are equipped with damping tube head, and the external diameter of this damping tube head is less than the internal diameter of hydraulic cylinder end cap flange connecting pipe head.
Various embodiments of the present invention be with fool proof hydraulic cylinder piston, owing to comprising the hydraulic cylinder piston body of setting, be symmetrical set two baffle plates in hydraulic cylinder piston body inside, wherein one is that another piece of sealing baffle is non-tight baffle plate, all be positioned at hydraulic cylinder piston body inside, and circumferentially uniform and be horizontally set on the several positioning pipes between two baffle plates, be positioned at hydraulic cylinder piston body inside, near sealing baffle, and the valve plate vertically arranging through the respective end of positioning pipe, and be positioned at hydraulic cylinder piston body outer fix placed in the middle, circumferentially uniform several sensor blocks of inlaying, can effectively solve hydraulic cylinder piston slap to the high pressure inlet/outlet cutout problem producing after hydraulic cylinder end cap flange, for certain protective action is played in energy recycle device steady circulation of high-pressure water flow under emergency, thereby can overcome the defect of the low and poor stability of reliability in prior art, to realize the high and good advantage of Security of reliability.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.
Below by drawings and Examples, technological scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:
Fig. 1 is the main TV structure schematic diagram of the fool proof hydraulic cylinder piston of band of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the structural representation of final position after hydraulic cylinder piston valve plate pressurized in the fool proof hydraulic cylinder piston of band of the present invention;
Fig. 4 is the structural representation of hydraulic cylinder piston and hydraulic cylinder in the fool proof hydraulic cylinder piston of band of the present invention;
Fig. 5 a is the structural representation that in the fool proof hydraulic cylinder piston of band of the present invention, hydraulic cylinder piston damping chamber forms the moment;
Fig. 5 b is the structural representation that in the fool proof hydraulic cylinder piston of band of the present invention, hydraulic cylinder piston damping chamber reduces the moment;
Fig. 5 c is the be open structural representation in moment of hydraulic cylinder piston baffle in the fool proof hydraulic cylinder piston of band of the present invention;
Fig. 5 d is that in the fool proof hydraulic cylinder piston of band of the present invention, hydraulic cylinder piston damping chamber is the structural representation in zero moment.
By reference to the accompanying drawings, in the embodiment of the present invention, reference character is as follows:
1-hydraulic cylinder piston body; 2-sealing baffle; 3-seal ring; 4-valve plate; 5-positioning pipe; 6-spring; 7-fastening piece (double-screw bolt and nut); 8-non-tight baffle plate; 9-sensor block; 100-hydraulic cylinder piston; 101-hydraulic cylinder; 102-hydraulic cylinder end cap flange; 103-hydraulic cylinder end cap flange connecting pipe head; 104-damping cavity.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
According to the embodiment of the present invention, as shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5 a, Fig. 5 b, Fig. 5 c and Fig. 5 d, provide one to be with fool proof hydraulic cylinder piston.Be with fool proof hydraulic cylinder piston to be built in hydraulic cylinder this, the external signal inductor of hydraulic cylinder, energy recycle device system is controlled the running state of switch by the external signal inductor induction of hydraulic cylinder, thereby change high-pressure thick salt solution enters the flow channel of hydraulic cylinder.
As shown in Figure 1, Figure 2 and Figure 3, the present embodiment be with fool proof hydraulic cylinder piston, comprise hydraulic cylinder piston body 1, sealing baffle 2 and non-tight baffle plate 8 are symmetrically distributed in hydraulic cylinder piston body 1 both sides, sealing baffle 2 and non-tight baffle plate 8 are equipped with damping tube head, this damping tube head external diameter is slightly less than hydraulic cylinder end cap flange connecting pipe head 103 internal diameters, is positioned at hydraulic cylinder piston body 1 outer fix placed in the middle, circumferentially uniformly inlays several sensor blocks 9;
Seal ring 3 is embedded on sealing baffle 2, and can be sealed and matched with valve plate 4;
Under high pressure, valve plate 4 can be on positioning pipe 5 in axial direction right side slide; It should be noted that, the left and right word that waits in the present invention is to be that benchmark carries out with reference to what illustrate for the orientation at accompanying drawing place, and it can not impact scope of the present invention.
In the above-described embodiments, positioning pipe 5 plays a supportive role to the installation of sealing baffle 2 and non-tight baffle plate 8, positioning pipe 5 smooth outer surfaces, and positioning pipe 5 is Spielpassung with valve plate 4;
Spring 6 is embedded between non-tight baffle plate 8 and valve plate 4, is circumferentially uniform arranging, and is placed on positioning pipe 5 outsides, and do not contact with positioning pipe 5.Require under normal circumstances all uniform spring 6 elastic force summations be slightly larger than valve plate 4 both sides current pressure reduction P act on valve plate 4, produce make a concerted effort, operated by rotary motion pressure reduction P is between 0.02MPa～0.04MPa.
Fastening piece 7 is fixed together sealing baffle 2, positioning pipe 5, non-tight baffle plate 8 by double-screw bolt and nut, and sealing baffle 2 and non-tight baffle plate 8 are fixedly secured in hydraulic cylinder piston body 1 both sides.
When hydraulic cylinder piston 100 is during in the interior operation of hydraulic cylinder 101, when the damp tube head plane of non-tight baffle plate 8 is during apart from hydraulic cylinder end cap flange 102 internal surface 0.25D, start to form damping cavity 104, wherein D is the diameter of hydraulic cylinder end cap flange 102 endoporus, sees Fig. 5 a.
Below in conjunction with institute's drawings attached, when the hydraulic cylinder piston in the embodiment of the present invention is moved in hydraulic cylinder, concrete function is described below:
(1) the former seawater of high-pressure thick salt solution and the high pressure design description that continues to flow is as follows:
Under normal circumstances, when hydraulic cylinder piston 100 is during in hydraulic cylinder 101 interior smooth running, valve plate 4 presents the state of closing under the elastic force effect of spring 6, be valve plate 4 with seal ring 3 and be impaction state with sealing baffle 2, stop hydraulic cylinder 101 inner high voltage brines by hydraulic cylinder piston 100 so that with the former sea water mixing of low pressure.
When energy reclaims test system, occur abnormal, as out of service in switch or do not start when operation, to cause hydraulic cylinder piston 101 to continue to move forward, while walking to its right end face plan range hydraulic cylinder end cap flange 102 internal surface 0.25D when the damping tube head of non-tight baffle plate 8, to start to produce damping phenomena, hydraulic cylinder piston left and right sides pressure reduction starts to increase simultaneously, when pressure reduction produce make a concerted effort to exceed spring and make a concerted effort time, high-pressure thick salt solution is pushed valve plate 4 open, thereby make final hydraulic cylinder piston 100 present Fig. 3 state, because spring 6 itself has certain length, even if pressurized compresses under extreme case, spring 6 still occupies certain length in the axial direction, thereby make to there is all the time spacing between valve plate 4 and non-tight baffle plate 8, and then the height that can make high-pressure thick salt solution enter energy recycle device by the space between valve plate 4 and non-tight baffle plate 8 extrudes pipeline, enter again energy and reclaim elevator pump, this project organization has effectively been avoided the generation of energy recycle device high pressure inlet/outlet cutout, reduced the high-voltage operation risk of system.
(2) hydraulic cylinder piston damping effect forming process specifically describes as follows:
The sealing baffle 2 of hydraulic cylinder piston 100 and non-tight baffle plate 8 outsides are equipped with damping tube head, see Fig. 3, and damping tube head diameter is slightly less than the internal diameter of hydraulic cylinder end cap flange connecting pipe head 103.
When its right end face plan range hydraulic cylinder end cap flange 102 internal surfaces of the damping tube head of the non-tight baffle plate 8 of hydraulic cylinder piston 100 are not less than 0.25D, from the water flow of hydraulic cylinder end cap flange connecting pipe head 103 flowing water, do not change, see Fig. 4.
As shown in Figure 5 a: when its right end face plan range hydraulic cylinder end cap flange 102 internal surface 0.25D of the damping tube head of the non-tight baffle plate 8 of hydraulic cylinder piston 100, start to form damping cavity 104, see Fig. 5 a.
As shown in Figure 5 b: hydraulic cylinder piston 100, due to inertia, continues operation to the right, and the current of damping cavity 104, because circulation area sharply reduces, reduce rapidly flow, and then hydraulic cylinder piston 100 is produced to damping function, see Fig. 5 b.
As shown in Figure 5 c: at hydraulic cylinder piston 100 because damping function is gradually in moderating process; hydraulic cylinder 101 inner high voltage brine water inlets are obstructed; hydraulic cylinder piston left and right sides pressure raises; and then can design when hydraulic cylinder piston 100 both sides current pressure reduction making a concerted effort of producing exceed spring and make a concerted effort; high-pressure thick salt solution can be pushed valve plate 4 open; and then by hydraulic cylinder piston 100 flow into energy recycle device height extrude pipeline section; thereby effectively avoided the high cutout that extrudes former seawater of energy recycle device to occur; protection energy reclaims elevator pump, sees Fig. 5 c.
As shown in Fig. 5 d: along with hydraulic cylinder piston 100 continues operation to the right, the length that the damping tube head of non-tight baffle plate 8 enters hydraulic cylinder end cap flange connecting pipe head 103 increases, the water flow of damping cavity 104 reduces, the running resistance of hydraulic cylinder piston 100 strengthens, and then subdued the energy of hydraulic cylinder piston 100, so that can be controlled to when damping cavity space is zero, the lucky motion speed of hydraulic cylinder piston 100 is zero, sees Fig. 5 d.
The various embodiments described above of the present invention be with fool proof hydraulic cylinder piston, at least can reach following beneficial effect:
(1) can effectively solve hydraulic cylinder piston and run to the high pressure inlet/outlet cutout problem producing after hydraulic cylinder end cap flange, for certain protective action is played in energy recycle device steady circulation of high-pressure water flow under emergency;
(2) the hydraulic cylinder piston of damping structure is when near hydraulic cylinder flange, when the damping tube head of baffle plate is during apart from hydraulic cylinder end cap flange connecting pipe head 0.25D, to produce damping cavity, this damping cavity can effectively be subdued the operation energy of hydraulic cylinder piston, reduce the motion speed of hydraulic cylinder piston, avoid hydraulic cylinder piston to strike fast on hydraulic cylinder end cap flange, thereby effectively protected hydraulic cylinder piston, extend the working life of hydraulic cylinder piston, and reduced noise and the vibration of system;
(3) valve plate cover is sliding outside positioning pipe, and valve plate is subject to can horizontally slip under water flow pressure and spring force effect at axial direction; The existence of positioning pipe has overcome the sagging problem that valve plate produces due to deadweight, thus the eccentricity issues while effectively having avoided valve plate to move in left and right.
(4) hydraulic cylinder piston is provided with sensor block, when hydraulic cylinder piston moves arrival desired location in hydraulic cylinder, sensor block can provide signal to the external inductor of hydraulic cylinder, show that in hydraulic cylinder, hydraulic cylinder piston has arrived desired location, and then the external inductor of hydraulic cylinder can provide signal to energy recycle device switch, carry out the commutation action of switch.
Compared with prior art, the various embodiments described above of the present invention be with fool proof hydraulic cylinder piston, when inductor as external in hydraulic cylinder is malfunctioning, cannot transmission of signal to switch, and then uncontrollable switch operation, hydraulic cylinder piston will continue operation forward, thereby strike rapidly hydraulic cylinder flange end cap, and significantly reduce high-pressure thick salt solution inflow, cause the former seawater cutout of high pressure, thereby cause energy to reclaim elevator pump water inlet and occur vacuum, affect the operation of system.This is with fool proof hydraulic cylinder piston, at least can reach following object:
(1) be of the present inventionly with fool proof hydraulic cylinder piston, while moving under extreme case, inside is provided with the valve plate of guaranteeing that current can one-way flow, thereby has effectively avoided the cutout of high-pressure thick salt solution and the former seawater of high pressure under emergency case;
(2) be of the present inventionly with fool proof hydraulic cylinder piston, both sides arrange the outstanding damping tube head with damping structure function, when hydraulic cylinder piston damping tube head is during apart from hydraulic cylinder end cap flange connecting pipe head 0.25D, start to form damping cavity, this damping cavity can effectively be subdued the kinergety of hydraulic cylinder piston, reduce the motion speed of hydraulic cylinder piston, thereby can avoid hydraulic cylinder piston to strike fast hydraulic cylinder end cap flange and the impaired situation of hydraulic cylinder piston is occurred, reducing equipment noise and vibration simultaneously.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technological scheme that still can record aforementioned each embodiment is modified, or part technical characteristics is wherein equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. be with fool proof hydraulic cylinder piston for one kind, it is characterized in that, comprise horizontally disposed hydraulic cylinder piston body, be symmetrical set two baffle plates in described hydraulic cylinder piston body inside, wherein one is that another piece of sealing baffle is non-tight baffle plate, all be positioned at described hydraulic cylinder piston body inside, and circumferentially uniform and be horizontally set on the several positioning pipes between two baffle plates, be positioned at described hydraulic cylinder piston body inside, near sealing baffle, and the valve plate vertically arranging through the respective end of positioning pipe, and be positioned at hydraulic cylinder piston body outer fix placed in the middle, circumferentially uniform several sensor blocks of inlaying.
2. be according to claim 1ly with fool proof hydraulic cylinder piston, it is characterized in that, along each positioning pipe axially, in the periphery of each positioning pipe, be arranged with spring, one end of spring contacts with non-tight baffle plate, the other end contacts with valve plate.
3. be according to claim 1ly with fool proof hydraulic cylinder piston, it is characterized in that, between described valve plate and sealing baffle, be provided with seal ring.
4. be according to claim 1ly with fool proof hydraulic cylinder piston, it is characterized in that, between each positioning pipe and two baffle plates, be provided with fastening piece.
5. be according to claim 4ly with fool proof hydraulic cylinder piston, it is characterized in that, described fastening piece comprises that coupling is connected to double-screw bolt and the nut between each positioning pipe and two baffle plates.
6. according to the fool proof hydraulic cylinder piston of being with described in any one in claim 1-5, it is characterized in that, described hydraulic pressure cylinder body, comprises horizontally disposed hydraulic cylinder, and is arranged on the hydraulic cylinder piston of described hydraulic cylinder inside.
7. be according to claim 6ly with fool proof hydraulic cylinder piston, it is characterized in that described hydraulic pressure cylinder body also comprises with described hydraulic cylinder and mates the hydraulic cylinder end cap flange and the hydraulic cylinder end cap flange connecting pipe head that are connected.
8. be according to claim 7ly with fool proof hydraulic cylinder piston, it is characterized in that described hydraulic pressure cylinder body also comprises the damping cavity between described hydraulic cylinder end cap flange and hydraulic cylinder piston.
9. be according to claim 7ly with fool proof hydraulic cylinder piston, it is characterized in that, described two baffle plates are equipped with damping tube head, and the external diameter of this damping tube head is less than the internal diameter of hydraulic cylinder end cap flange connecting pipe head.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310750566.1A CN103759002B (en) | 2013-12-31 | 2013-12-31 | The fool proof water hydraulic cylinder piston of a kind of band |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310750566.1A CN103759002B (en) | 2013-12-31 | 2013-12-31 | The fool proof water hydraulic cylinder piston of a kind of band |
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| CN103759002A true CN103759002A (en) | 2014-04-30 |
| CN103759002B CN103759002B (en) | 2016-07-06 |
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| CN201310750566.1A Active CN103759002B (en) | 2013-12-31 | 2013-12-31 | The fool proof water hydraulic cylinder piston of a kind of band |
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Citations (9)
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| EP0870931B1 (en) * | 1997-04-10 | 2001-05-23 | Bümach Engineering International B.V. | Actuator with end-of-stroke-cushioning |
| WO2002042649A1 (en) * | 2000-11-23 | 2002-05-30 | Choi Hag Bong | Stepless cushion type hydraulic cylinder |
| DE20213022U1 (en) * | 2002-08-24 | 2003-01-16 | Schlutz Heinz | End of stroke damper for hydraulically operated cylinder, comprising two axial movable discs joined with two bolts |
| DE10158123A1 (en) * | 2001-11-27 | 2003-06-12 | Rexroth Mecman Gmbh | Dampened pressure medium cylinder |
| CN101476577A (en) * | 2009-01-17 | 2009-07-08 | 四川长江工程起重机有限责任公司 | Oil cylinder with position self-checking function |
| CN201810608U (en) * | 2010-09-20 | 2011-04-27 | 三一重工股份有限公司 | Hydrocylinder with buffer function, hydraulic system and reciprocating driving mechanism |
| CN202768523U (en) * | 2012-08-17 | 2013-03-06 | 徐州徐工挖掘机械有限公司 | Bi-directional automatic buffering hydraulic oil cylinder |
| CN103148053A (en) * | 2013-03-04 | 2013-06-12 | 长沙理工大学 | Stroke control energy-saving buffering method of pumping oil cylinder used for concrete pump |
| CN103438247A (en) * | 2013-08-08 | 2013-12-11 | 丽水德力通水务设备制造有限公司 | Hydraulic pressure differential controller and application thereof |
-
2013
- 2013-12-31 CN CN201310750566.1A patent/CN103759002B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0870931B1 (en) * | 1997-04-10 | 2001-05-23 | Bümach Engineering International B.V. | Actuator with end-of-stroke-cushioning |
| WO2002042649A1 (en) * | 2000-11-23 | 2002-05-30 | Choi Hag Bong | Stepless cushion type hydraulic cylinder |
| DE10158123A1 (en) * | 2001-11-27 | 2003-06-12 | Rexroth Mecman Gmbh | Dampened pressure medium cylinder |
| DE20213022U1 (en) * | 2002-08-24 | 2003-01-16 | Schlutz Heinz | End of stroke damper for hydraulically operated cylinder, comprising two axial movable discs joined with two bolts |
| CN101476577A (en) * | 2009-01-17 | 2009-07-08 | 四川长江工程起重机有限责任公司 | Oil cylinder with position self-checking function |
| CN201810608U (en) * | 2010-09-20 | 2011-04-27 | 三一重工股份有限公司 | Hydrocylinder with buffer function, hydraulic system and reciprocating driving mechanism |
| CN202768523U (en) * | 2012-08-17 | 2013-03-06 | 徐州徐工挖掘机械有限公司 | Bi-directional automatic buffering hydraulic oil cylinder |
| CN103148053A (en) * | 2013-03-04 | 2013-06-12 | 长沙理工大学 | Stroke control energy-saving buffering method of pumping oil cylinder used for concrete pump |
| CN103438247A (en) * | 2013-08-08 | 2013-12-11 | 丽水德力通水务设备制造有限公司 | Hydraulic pressure differential controller and application thereof |
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| CN103759002B (en) | 2016-07-06 |
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Effective date of registration: 20180109 Address after: 100088 Beijing city Haidian District Xitucheng Road No. 33 Co-patentee after: MCC Central Research Institute of Building and Construction Co., Ltd. Patentee after: Zhong Ye energy-conserving and environment-protective limited liability company Co-patentee after: China Jingye Engineering Technology Co., Ltd. Address before: 100029, room 5, building 2, No. 1118 middle Sheng Road, Chaoyang District, Beijing Patentee before: MCC DESALINATION INVESTMENTS CO., LTD. |