CN202247831U - Locking device and hydraulic control system thereof - Google Patents
Locking device and hydraulic control system thereof Download PDFInfo
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- CN202247831U CN202247831U CN2011202825424U CN201120282542U CN202247831U CN 202247831 U CN202247831 U CN 202247831U CN 2011202825424 U CN2011202825424 U CN 2011202825424U CN 201120282542 U CN201120282542 U CN 201120282542U CN 202247831 U CN202247831 U CN 202247831U
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Abstract
The utility model discloses a locking device and a hydraulic control system thereof. The locking device comprises a platform support, a locking rack, a first driver, a pile leg supporting the platform frame, a lifting rack arranged on the pile leg, a hydraulic cylinder and a hydraulic control system, wherein the hydraulic cylinder and the hydraulic control system are hinged between the platform support and the supporting rack; the first driver is used for driving the locking rack to move; the hydraulic cylinder comprises a cylinder body, a first piston rod, a second piston rod and a partition board; the partition board is arranged in the cylinder body to divide the cylinder body into a first cavity and a second cavity; the first piston rod is arranged in the first cavity; and the second piston rod is arranged in the second cavity. The hydraulic system comprises a container, a first reversing valve, a second reversing valve, a first pressure reliving overflow valve and a second pressure reliving overflowing valve. The locking device uses the hydraulic control system to regulate the oil pressure in the rodless cavity and the rod cavity, so the accurate regulation of the upper and lower displacements of the locking rack is realized and regulation time is saved.
Description
Technical field
The utility model relates to a kind of elevating platform, relates in particular to a kind of locking device and hydraulic control system thereof of elevating platform.
Background technology
Elevating platform is a kind of mobile ocean engineering platform that is used for marine energy sources exploitation and prospecting, and this platform can arrive predetermined area work through the barge traction.The chief component of elevating platform is the spud leg of working platform, support platform, the power set of control workbench lifting and the locking device behind the working platform location.Behind the relative position of adjustment working platform and spud leg, need to start locking device platform is pinned, by the support and the locking of locking device implementation platform.
Existing locking device comprises locking rack, be used to promote or drive lifter rack engagement or the dynamical element that separates on locking rack and the spud leg, be used to promote the lifter that locking rack moves up and down.Behind the relative position of adjustment working platform and spud leg; Start dynamical element, mesh with lifter rack, when the tooth top of the tooth top of locking rack and lifter rack is relative thereby promote locking rack; Start lifter; Promote locking tooth piece and move up and down, make that the teeth groove of tooth top and lifter rack of locking rack is relative, thereby make locking rack and lifter rack mesh smoothly.
Yet in actual use, discovery need be through the stroke of repeatedly adjustment lifter, and the teeth groove of tooth top and lifter rack that can reach locking rack is relative.
The utility model content
In view of this, be necessary to provide a kind of locking device of being convenient to adjust the locking rack upper and lower displacement.
Also be necessary to provide a kind of hydraulic control system of being convenient to adjust the locking rack upper and lower displacement.
A kind of locking device; Comprise platform support, locking rack, first driver, be used for the spud leg of support platform support and be arranged at the lifter rack on the said spud leg; Said first driver moves in order to drive said locking rack, makes said locking rack to mesh with said lifter rack and to separate, and said elevating platform locking device also comprises fluid cylinder and the hydraulic control system that is articulated between said platform support and the said locking rack; Said fluid cylinder comprises cylinder body, first piston bar, second piston rod and dividing plate; Said dividing plate is arranged in the said cylinder body, and said cylinder body is divided into first chamber and second chamber, offers the through hole that said first piston bar passes on the said dividing plate; Said first piston bar is arranged in said first chamber, and said second piston rod is arranged in said second chamber; Said hydraulic control system comprises container, first reversal valve, second reversal valve, the first decompression overflow valve and the second decompression overflow valve; The P mouth of said first reversal valve is connected said container with the T mouth, and the A mouth connects the said first decompression overflow valve, and the B mouth connects the rod chamber of said first chamber; When the P mouth of said first reversal valve was connected with the A mouth, said T mouth was connected with the B mouth; When the P mouth of said first reversal valve was connected with the B mouth, said T mouth was connected with the A mouth; The T mouth of said second reversal valve connects said container, and the P mouth is connected with the said second decompression overflow valve, and the A mouth connects the rodless cavity of said second chamber; When the T mouth of said second reversal valve was connected with the A mouth, said P mouth broke off; When the P mouth of said second reversal valve was connected with the A mouth, said T mouth broke off; The said first decompression overflow valve connects the rodless cavity of said first reversal valve and said first chamber; The said second decompression overflow valve connects said container and said second reversal valve.
Said fluid cylinder one end is articulated on the A point of platform support, and the other end is articulated on the B point of locking rack, and when the height of adjustment rack platform, the angle a between line segment AB and the spud leg is more than or equal to 0 degree and smaller or equal to 90 degree.
Said angle a spends smaller or equal to 20 more than or equal to 1 degree.
Said first reversal valve and second reversal valve are electromagnetic valve; When said first reversal valve not when electric, when the P mouth of said first reversal valve was connected with the A mouth, the T mouth was connected with the B mouth; When said first reversal valve gets when electric, when the P mouth of said first reversal valve was connected with the B mouth, said T mouth was connected with the A mouth; When said second reversal valve not when electric, when the T mouth of said second reversal valve was connected with the A mouth, the P mouth broke off; When said second reversal valve gets when electric, when the P mouth of said second reversal valve was connected with the A mouth, the T mouth broke off.
Said hydraulic control system also comprises the one way valve between the A mouth that is arranged at said first reversal valve and the said first decompression overflow valve, said one way valve be used to limit liquid from said first reversal valve to the said first decompression overflow valve one-way flow.
Said hydraulic control system also comprises the one-way throttle valve between the rodless cavity of the A mouth that is arranged at said second reversal valve and said second chamber; Said one-way throttle valve comprises the one way valve and the choke valve of parallel connection; Said one way valve is used to limit the rodless cavity one-way flow of liquid from the A mouth of said second reversal valve to said second chamber, and said choke valve is used to regulate liquid from the rodless cavity of said second chamber flow to the said second electromagnetic switch valve flow.
Said cylinder body is articulated on the said platform support, and said second piston rod is articulated on the said locking rack.
A kind of hydraulic control system that is used to control fluid cylinder; Said fluid cylinder comprises cylinder body, first piston bar, second piston rod and dividing plate; Said dividing plate is arranged in the said cylinder body, and said cylinder body is divided into first chamber and second chamber, offers the through hole that said first piston bar passes on the said dividing plate; Said first piston bar is arranged in said first chamber, and said second piston rod is arranged in said second chamber; Said hydraulic control system comprises container, first reversal valve, second reversal valve, the first decompression overflow valve and the second decompression overflow valve; The P mouth of said first reversal valve is connected said container with the T mouth, and the A mouth connects the said first decompression overflow valve, and the B mouth connects the rod chamber of said first chamber; When the P mouth of said first reversal valve was connected with the A mouth, said T mouth was connected with the B mouth; When the P mouth of said first reversal valve was connected with the B mouth, said T mouth was connected with the A mouth; The T mouth of said second reversal valve connects said container, and the P mouth is connected with the said second decompression overflow valve, and the A mouth connects the rodless cavity of said second chamber; When the T mouth of said second reversal valve was connected with the A mouth, said P mouth broke off; When the P mouth of said second reversal valve was connected with the A mouth, said T mouth broke off; The said first decompression overflow valve connects the rodless cavity of said first reversal valve and said first chamber; The said second decompression overflow valve connects said container and said second reversal valve.
Said hydraulic control system also comprises the one way valve between the A mouth that is arranged at said first reversal valve and the said first decompression overflow valve, said one way valve be used to limit liquid from said first reversal valve to the said first decompression overflow valve one-way flow.
Said hydraulic control system also comprises the one-way throttle valve between the rodless cavity of the A mouth that is arranged at said second reversal valve and said second chamber; Said one-way throttle valve comprises the one way valve and the choke valve of parallel connection; Said one way valve is used to limit the rodless cavity one-way flow of liquid from the A mouth of said second reversal valve to said second chamber, and said choke valve is used to regulate liquid from the rodless cavity of said second chamber flow to the said second electromagnetic switch valve flow.
Above-mentioned locking device is realized the accurate adjustment of adjustment locking rack upper and lower displacement through the rodless cavity of hydraulic control system adjustment fluid cylinder and the oil pressure of rod chamber, has practiced thrift the time of adjustment.
Description of drawings
Fig. 1 is the sketch map of a preferred embodiment locking device.
Fig. 2 is the sketch map of the fluid cylinder stationary state of locking device among Fig. 1.
Fig. 3 is the generalized section of fluid cylinder among Fig. 1.
Fig. 4 is the hydraulic control system sketch map of fluid cylinder among Fig. 1.
Specific embodiment
As shown in Figure 1, be the sketch map of a preferred embodiment locking device 100.Locking device 100 comprises spud leg 10, platform support 20, locking rack 30, first driver 40 and fluid cylinder 50.
Spud leg 10 is used for support platform support 20, and spud leg 10 is provided with lifter rack 11.
Locking rack 30 is used for and lifter rack 11 engagements, through adjustment locking rack 30 and lifter rack 11 position engaged, thus the relative position of adjustment platform support 20 and spud leg 10.
First driver, 40 1 ends connect locking rack 30, and the other end connects platform support 20.First driver 40 is used to drive locking rack 30 and lifter rack 11 engagements, perhaps drives locking rack 30 and separates with lifter rack 11.In this embodiment, this first driver 40 is the fluid cylinder that resets.The number of fluid cylinder of resetting is two.
As shown in Figure 2, fluid cylinder 50 1 ends are articulated on the platform support 20, and the other end is articulated on the locking rack 30, and are positioned at the center of gravity place of locking rack 30, and fluid cylinder 50 is used to support locking rack 30.The pin joint of setting fluid cylinder 50 and platform support 20 is A, and fluid cylinder 50 is B with the pin joint of locking rack 30.When initial position, promptly when the height of adjustment platform support 20, as shown in Figure 1, the angle between line segment AB and the spud leg is a, and angle a is more than or equal to 0 degree, and less than 90 degree, the preferable range of angle a is smaller or equal to 20 degree greater than 1 degree.In this embodiment, a equals 5 degree.
Please consult Fig. 3 simultaneously, fluid cylinder 50 is the secondary fluid cylinder.Fluid cylinder 50 comprises cylinder body 51, first piston bar 53 and second piston rod 55.Cylinder body 51 is articulated on the platform support 20, and is divided into first chamber 511 and second chamber 513 by dividing plate 57.Offer the through hole 571 that first piston bar 53 passes on the dividing plate 57.First piston bar 53 is arranged in first chamber 511 versatilely, and second piston rod 55 is arranged in second chamber 513 versatilely, and its end is articulated in locking rack 30.
Locking device 100 also comprises the hydraulic control system 60 of controlling fluid cylinder 50.Please consult Fig. 4 simultaneously, hydraulic control system 60 comprises container 61, first solenoid operated directional valve 63, one way valve 64, the first decompression overflow valve 65, second decompression overflow valve 66, second solenoid operated directional valve 67 and the one-way throttle valve 68.
First solenoid operated directional valve 63 is the two-position four-way solenoid operated directional valve.The P mouth of first solenoid operated directional valve 63 is connected with container 61 with the T mouth, and the P mouth is the inlet that highly pressurised liquid gets into first solenoid operated directional valve 63, and the T mouth flows back to the liquid outlet of container 61 for liquid.The B mouth of first solenoid operated directional valve 63 is connected with the rod chamber of first chamber 511, and the A mouth of first solenoid operated directional valve 63 is connected with the inlet of one way valve 64.When first solenoid operated directional valve 63 was not switched on, the P mouth was communicated with the A mouth, and the T mouth is communicated with the B mouth; When 63 energisings of first solenoid operated directional valve, the P mouth is communicated with the B mouth, and the T mouth is communicated with the A mouth.
Between that one way valve 64 is connected in first the solenoid operated directional valve 63 and first decompression overflow valve 65, be used to limit the liquid one-way flow, that is, limit liquid and only can flow from the direction of first solenoid operated directional valve 63 to the first decompression overflow valve 65.
The P mouth of the first decompression overflow valve 65 is connected with the liquid outlet of one way valve 67, and the T mouth of the first decompression overflow valve 65 is connected with container 61, and the A mouth of the first decompression overflow valve 65 is connected with the rodless cavity of first chamber 511.When the pressure of the rodless cavity of first chamber 511 surpassed the preset operating pressure of the first decompression overflow valve 65, liquid can flow back to container 61 from the T mouth of the first decompression overflow valve 65.
The P mouth of the second decompression overflow valve 66 all is connected with container 61 with the T mouth, and the P mouth is the inlet that highly pressurised liquid gets into the second decompression overflow valve 66, and the T mouth flows back to the liquid outlet of container 61 for liquid.The A mouth of the second decompression overflow valve 66 is connected with first solenoid operated directional valve 67.When second pressure that receives of decompression overflow valve 66 during greater than a preset operating pressure, liquid can flow back to container 61 from the T mouth of the second decompression overflow valve 66.
Second solenoid operated directional valve 67 is the two-position three way solenoid operated directional valve.The P mouth of second solenoid operated directional valve 67 is connected with the A mouth of the second decompression overflow valve 66, and the T mouth is connected to container 61.The A mouth of second solenoid operated directional valve 67 is connected with one-way throttle valve 68.When second solenoid operated directional valve 67 was not switched on, the T mouth was communicated with the A mouth, and the P mouth breaks off; When 67 energisings of second solenoid operated directional valve, the P mouth is communicated with the A mouth, and the T mouth breaks off.
One end of one-way throttle valve 68 connects the A mouth of second solenoid operated directional valve 67, and the other end is connected with the rodless cavity of second chamber 513.One-way throttle valve 68 comprises the one way valve 681 and choke valve 683 of parallel connection.One way valve 681 is used to limit the flow direction of liquid, promptly limits liquid and only can flow from the rodless cavity direction of second solenoid operated directional valve 67 to second chamber 513.Choke valve 683 is used to regulate the flow that liquid flows to second solenoid operated directional valve 67 from the rodless cavity of second chamber 513.
Before the use, at first, need in the rodless cavity of first chamber 511 of fluid cylinder 50, inject liquid, highly pressurised liquid gets into first solenoid operated directional valve 63 from container 61, reduces pressure behind the overflow valve 65 through one way valve 64 and first again, gets into the rodless cavity of first chamber 511; Then, the operating pressure of the first decompression overflow valve 65 and the second decompression overflow valve 66 is set respectively, the weight that can support locking rack 30 with fluid cylinder 50 is advisable.
After the relative position of adjustment platform support 20 and spud leg 10 finishes, then need platform support 20 be lock onto on the spud leg 10, start first driver 40, promote locking rack 30 and lifter rack 11 engagements, have following three kinds of situation.
First: when the teeth groove of the tooth top of locking rack 30 and lifter rack 11 fully to correct time, locking rack 30 directly meshes with lifter rack 11.
Second: when the teeth groove of the tooth top of locking rack 30 and lifter rack 11 relative; But do not align fully constantly; Under the thrust of first driver 40; Locking rack 30 also can move along lifter rack 11 in lifter rack 11 directions engagements downward or upward, thereby second piston rod 55 that drives fluid cylinder 50 stretches out or first piston bar 53 and second piston rod 55 are withdrawn synchronously; When second piston rod 55 stretches out, the rodless cavity of second chamber 513 from container 61 via second solenoid operated directional valve 67 and one-way throttle valve 68 liquid make-up; When first piston bar 53 and 55 withdrawals of second piston rod; The rod chamber of first chamber 511 from container 61 via first solenoid operated directional valve, 63 liquid make-up; The rod chamber of second chamber 513 is directly from container 61 liquid make-up; Liquid in the rodless cavity of first chamber 511 flows back to container 61 through the T mouth of the first decompression overflow valve 65; Liquid in the rodless cavity of second chamber 513 flows back to container 61 through the one-way throttle valve 68 and second solenoid operated directional valve 67, thereby makes the tooth top of locking rack 30 slip into smoothly in the teeth groove of lifter rack 11, realizes locking.
The the 3rd: when the tooth top of the tooth top of locking rack 30 and lifter rack 11 is relative; At first; Second solenoid operated directional valve 67 is got; The P mouth of second solenoid operated directional valve 67 is communicated with the A mouth, and the liquid in the container 61 makes second piston rod 55 promote locking racks 30 and is moved upward to end of travel via the rodless cavity of one way valve 681 back entering second chamber 513 of second decompression overflow valve 66, second solenoid operated directional valve 67 and one-way throttle valve 68; Simultaneously, the liquid of the rod chamber of second chamber 513 flows back to container 61; Then; Under the thrust of first driver 40, locking rack 30 and lifter rack 11 engagements, at this moment; Locking rack 30 only can move down; Thereby drive 55 withdrawals of second piston rod, the rod chamber that flows back to container 61, the second chambers 513 behind choke valve 683, second solenoid operated directional valve 67 and the second decompression overflow valve 66 of the liquid of the rodless cavity of second chamber 513 via one-way throttle valve 68 is directly from container 61 liquid make-up; Thereby make the tooth top of locking rack 30 slip into smoothly in the teeth groove of lifter rack 11, realize locking.
When the needs adjusting resets; It is electric that the solenoid operated directional valve 63 of winning is got, and the P mouth of first solenoid operated directional valve 63 is communicated with the B mouth, and the T mouth is communicated with the A mouth; Liquid in the container 61 gets into the rod chamber of first chamber 511 via first solenoid operated directional valve; First piston bar 53 is withdrawn, and the liquid of the rodless cavity of first chamber 511 flows back to container 61, the second piston rods 55 via the first decompression overflow valve 65 withdraws under the effect of gravity; The rod chamber of second chamber 513 is directly from container 61 liquid make-up, and the liquid of the rodless cavity of second chamber 513 flows back to container 61 after via the choke valve 683 of one-way throttle valve 68 and second solenoid operated directional valve 67.
Above-mentioned locking device 100 is realized the accurate adjustment of adjustment locking rack 30 upper and lower displacements, thereby is avoided adjusting repeatedly through the rodless cavity of second chamber 513 of adjustment fluid cylinder 50 and the oil pressure of rod chamber.
Claims (10)
1. a locking device comprises platform support, locking rack, first driver, is used for the spud leg of support platform support and is arranged at the lifter rack on the said spud leg; Said first driver moves in order to drive said locking rack, makes said locking rack to mesh with said lifter rack and to separate; It is characterized in that: said elevating platform locking device also comprises fluid cylinder and the hydraulic control system that is articulated between said platform support and the said locking rack; Said fluid cylinder comprises cylinder body, first piston bar, second piston rod and dividing plate; Said dividing plate is arranged in the said cylinder body, and said cylinder body is divided into first chamber and second chamber, offers the through hole that said first piston bar passes on the said dividing plate; Said first piston bar is arranged in said first chamber, and said second piston rod is arranged in said second chamber; Said hydraulic control system comprises container, first reversal valve, second reversal valve, the first decompression overflow valve and the second decompression overflow valve; The P mouth of said first reversal valve is connected said container with the T mouth, and the A mouth connects the said first decompression overflow valve, and the B mouth connects the rod chamber of said first chamber; When the P mouth of said first reversal valve was connected with the A mouth, said T mouth was connected with the B mouth; When the P mouth of said first reversal valve was connected with the B mouth, said T mouth was connected with the A mouth; The T mouth of said second reversal valve connects said container, and the P mouth is connected with the said second decompression overflow valve, and the A mouth connects the rodless cavity of said second chamber; When the T mouth of said second reversal valve was connected with the A mouth, said P mouth broke off; When the P mouth of said second reversal valve was connected with the A mouth, said T mouth broke off; The said first decompression overflow valve connects the rodless cavity of said first reversal valve and said first chamber; The said second decompression overflow valve connects said container and said second reversal valve.
2. locking device as claimed in claim 1 is characterized in that: said fluid cylinder one end is articulated on the A point of platform support, and the other end is articulated on the B point of locking rack; When the height of adjustment rack platform, the angle a between line segment AB and the spud leg is more than or equal to 0 degree and smaller or equal to 90 degree.
3. locking device as claimed in claim 2 is characterized in that: said angle a spends smaller or equal to 20 more than or equal to 1 degree.
4. locking device as claimed in claim 1 is characterized in that: said first reversal valve and second reversal valve are electromagnetic valve; When said first reversal valve not when electric, when the P mouth of said first reversal valve was connected with the A mouth, the T mouth was connected with the B mouth; When said first reversal valve gets when electric, when the P mouth of said first reversal valve was connected with the B mouth, said T mouth was connected with the A mouth; When said second reversal valve not when electric, when the T mouth of said second reversal valve was connected with the A mouth, the P mouth broke off; When said second reversal valve gets when electric, when the P mouth of said second reversal valve was connected with the A mouth, the T mouth broke off.
5. locking device as claimed in claim 1; It is characterized in that: said hydraulic control system also comprises the one way valve between the A mouth that is arranged at said first reversal valve and the said first decompression overflow valve, said one way valve be used to limit liquid from said first reversal valve to the said first decompression overflow valve one-way flow.
6. locking device as claimed in claim 1; It is characterized in that: said hydraulic control system also comprises the one-way throttle valve between the rodless cavity of the A mouth that is arranged at said second reversal valve and said second chamber; Said one-way throttle valve comprises the one way valve and the choke valve of parallel connection; Said one way valve is used to limit the rodless cavity one-way flow of liquid from the A mouth of said second reversal valve to said second chamber, and said choke valve is used to regulate liquid from the rodless cavity of said second chamber flow to the said second electromagnetic switch valve flow.
7. locking device as claimed in claim 1 is characterized in that: said cylinder body is articulated on the said platform support, and said second piston rod is articulated on the said locking rack.
8. hydraulic control system that is used to control fluid cylinder, said fluid cylinder comprises cylinder body, first piston bar, second piston rod and dividing plate; Said dividing plate is arranged in the said cylinder body, and said cylinder body is divided into first chamber and second chamber, offers the through hole that said first piston bar passes on the said dividing plate; Said first piston bar is arranged in said first chamber, and said second piston rod is arranged in said second chamber; Said hydraulic control system comprises container, first reversal valve, second reversal valve, the first decompression overflow valve and the second decompression overflow valve; The P mouth of said first reversal valve is connected said container with the T mouth, and the A mouth connects the said first decompression overflow valve, and the B mouth connects the rod chamber of said first chamber; When the P mouth of said first reversal valve was connected with the A mouth, said T mouth was connected with the B mouth; When the P mouth of said first reversal valve was connected with the B mouth, said T mouth was connected with the A mouth; The T mouth of said second reversal valve connects said container, and the P mouth is connected with the said second decompression overflow valve, and the A mouth connects the rodless cavity of said second chamber; When the T mouth of said second reversal valve was connected with the A mouth, said P mouth broke off; When the P mouth of said second reversal valve was connected with the A mouth, said T mouth broke off; The said first decompression overflow valve connects the rodless cavity of said first reversal valve and said first chamber; The said second decompression overflow valve connects said container and said second reversal valve.
9. hydraulic control system as claimed in claim 8; It is characterized in that: said hydraulic control system also comprises the one way valve between the A mouth that is arranged at said first reversal valve and the said first decompression overflow valve, said one way valve be used to limit liquid from said first reversal valve to the said first decompression overflow valve one-way flow.
10. hydraulic control system as claimed in claim 9; It is characterized in that: said hydraulic control system also comprises the one-way throttle valve between the rodless cavity of the A mouth that is arranged at said second reversal valve and said second chamber; Said one-way throttle valve comprises the one way valve and the choke valve of parallel connection; Said one way valve is used to limit the rodless cavity one-way flow of liquid from the A mouth of said second reversal valve to said second chamber, and said choke valve is used to regulate liquid from the rodless cavity of said second chamber flow to the said second electromagnetic switch valve flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202825424U CN202247831U (en) | 2011-08-05 | 2011-08-05 | Locking device and hydraulic control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202825424U CN202247831U (en) | 2011-08-05 | 2011-08-05 | Locking device and hydraulic control system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202247831U true CN202247831U (en) | 2012-05-30 |
Family
ID=46109093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202825424U Withdrawn - After Issue CN202247831U (en) | 2011-08-05 | 2011-08-05 | Locking device and hydraulic control system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202247831U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797724A (en) * | 2012-08-24 | 2012-11-28 | 无锡市裕神液压机械有限公司 | Oil cylinder with mechanical protection |
| CN102912778A (en) * | 2011-08-05 | 2013-02-06 | 四川宏华石油设备有限公司 | Locking device and hydraulic control system thereof |
| WO2014161346A1 (en) * | 2013-04-03 | 2014-10-09 | 四川宏华石油设备有限公司 | Locking apparatus for leg sinking platform |
| CN104420454A (en) * | 2013-09-03 | 2015-03-18 | 四川宏华石油设备有限公司 | Worm structure of self-elevating drilling platform locking system |
| EP2847388A4 (en) * | 2012-06-27 | 2015-10-07 | Bardex Corp | Longitudinal restraint |
| CN107938620A (en) * | 2017-11-21 | 2018-04-20 | 成都市绿洲节水灌溉工程有限公司 | The two-part river blocking apparatus improved for city appearance water body |
| CN108999832A (en) * | 2018-08-02 | 2018-12-14 | 重庆维庆液压机械有限公司 | A kind of self locking hydraulic cylinder |
-
2011
- 2011-08-05 CN CN2011202825424U patent/CN202247831U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912778A (en) * | 2011-08-05 | 2013-02-06 | 四川宏华石油设备有限公司 | Locking device and hydraulic control system thereof |
| CN102912778B (en) * | 2011-08-05 | 2014-11-12 | 四川宏华石油设备有限公司 | Locking device and hydraulic control system thereof |
| EP2847388A4 (en) * | 2012-06-27 | 2015-10-07 | Bardex Corp | Longitudinal restraint |
| CN102797724A (en) * | 2012-08-24 | 2012-11-28 | 无锡市裕神液压机械有限公司 | Oil cylinder with mechanical protection |
| CN102797724B (en) * | 2012-08-24 | 2015-11-18 | 无锡市裕神液压机械有限公司 | With the oil cylinder of mechanical protection |
| WO2014161346A1 (en) * | 2013-04-03 | 2014-10-09 | 四川宏华石油设备有限公司 | Locking apparatus for leg sinking platform |
| CN104420454A (en) * | 2013-09-03 | 2015-03-18 | 四川宏华石油设备有限公司 | Worm structure of self-elevating drilling platform locking system |
| CN107938620A (en) * | 2017-11-21 | 2018-04-20 | 成都市绿洲节水灌溉工程有限公司 | The two-part river blocking apparatus improved for city appearance water body |
| CN108999832A (en) * | 2018-08-02 | 2018-12-14 | 重庆维庆液压机械有限公司 | A kind of self locking hydraulic cylinder |
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