CN107165881A - A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit - Google Patents
A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit Download PDFInfo
- Publication number
- CN107165881A CN107165881A CN201710601014.2A CN201710601014A CN107165881A CN 107165881 A CN107165881 A CN 107165881A CN 201710601014 A CN201710601014 A CN 201710601014A CN 107165881 A CN107165881 A CN 107165881A
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- oil
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- cylinder
- oil inlet
- rod chamber
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- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 31
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 141
- 238000012544 monitoring process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/006—Modular components with multiple uses, e.g. kits for either normally-open or normally-closed valves, interchangeable or reprogrammable manifolds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit, including the rodless cavity oil circuit being made up of balanced valve, pipeline explosion-proof valve, oil cylinder rodless cavity safety valve, oil cylinder rodless cavity pressure measurement exhaust joint, and the rod chamber oil circuit being made up of cylinder rod chamber pressure measurement exhaust joint, cylinder rod chamber safety valve, check valve I, choke valve, check valve II.Effect of the present invention is obvious, convenient use, by being provided with balanced valve, pipeline explosion-proof valve, safety valve, pressure measurement exhaust joint, check valve, choke valve in integrated control valve group, and with pressure balance oil circuit and correspondence hydraulic fluid port, to reach jacking cylinder integrated security, reclaim speed governing, pressure measurement exhaust, explosion-proof pipeline, balance locking, twin-tub pressure balance function, the security reliability worked under each operating mode of main frame is greatly improved, and versatility is more preferably.
Description
Technical field
The present invention relates to a kind of control oil circuit of hydraulic jack, belong to engineering machinery field, specifically a kind of function integrated-type
Large-tonnage tower crane jacking cylinder and control oil circuit.
Background technology
At present, the domestic jacking cylinder supporting for tower crane is threaded cartridge balanced valve or outside inside cylinder bottom mostly
Mounting plate type balanced valve, and oil cylinder two chambers use steel ball+bleed screw means of deflation.Said elements are only integrated with balance
The function that locking and pressure measurement are vented.For the cavity pressure of oil cylinder in work two overload, balance defective valve or the explosion of oil cylinder external hose
When oil cylinder downslide out of control, when monitoring the chamber of oil cylinder two operating pressure, regulation oil cylinder reclaim speed, multi-cylinder synchronous jacking when pressure
Balancing function is not directed to and considered.Meanwhile, the jacking cylinder being related to is mainly used in single cylinder jack-up system, same to multi-cylinder
Step jack-up system applicability is not strong, and application has limitation.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention provides a kind of function integrated-type large-tonnage tower crane jacking cylinder
And control oil circuit, can integrated security, reclaim speed governing, explosion-proof pressure measurement exhaust, pipeline, balance locking, twin-tub pressure balance function and be
Security reliability, the versatility worked under one, lifting each operating mode of main frame is stronger.
To achieve these goals, the technical solution adopted by the present invention is：A kind of function integrated-type large-tonnage tower crane jacking
The control oil circuit of oil cylinder, including connect by balanced valve, pipeline explosion-proof valve, oil cylinder rodless cavity safety valve, oil cylinder rodless cavity pressure measurement exhaust
The rodless cavity oil circuit of head composition, and by cylinder rod chamber pressure measurement exhaust joint, cylinder rod chamber safety valve, check valve I, throttling
The rod chamber oil circuit that valve, check valve II are constituted；Described rodless cavity oil circuit is connected to oil cylinder rodless cavity valve group including oil inlet and entered
The balanced valve of hydraulic fluid port, the oil-out of the balanced valve is connected to the oil inlet and pressure balance hydraulic fluid port of pipeline explosion-proof valve, the pipe
The oil-out of road explosion-proof valve is connected to oil cylinder rodless cavity safety valve oil inlet, oil cylinder rodless cavity pressure measurement exhaust joint oil inlet and oil
Cylinder rodless cavity oil inlet；Described rod chamber oil circuit includes being connected to the cylinder rod chamber valve group oil-feed of the control mouth of balanced valve
Mouthful, the rod chamber valve group oil inlet is additionally coupled to the oil inlet of check valve II and the oil-out of check valve I；The check valve
II oil-out is connected to the oil inlet of choke valve, and the oil-out of the choke valve is connected to the oil-feed of cylinder rod chamber safety valve
Mouth, the oil inlet of cylinder rod chamber pressure measurement exhaust joint, the oil inlet of check valve I and cylinder rod chamber oil inlet；The oil
The oil-out of cylinder rodless cavity safety valve is connected to the oil-out and safety valve oil return opening of cylinder rod chamber safety valve.
A kind of function integrated-type large-tonnage tower crane jacking cylinder, including jacking cylinder and integrated control valve group, the jacking
The rodless cavity that the rodless cavity of oil cylinder is connected to integrated control valve group by pipeline I controls oil circuit, the rod chamber of the jacking cylinder
The rod chamber for being connected to integrated control valve group by pipeline II controls oil circuit.
Further, described rodless cavity control oil circuit includes the balance that oil inlet is connected to oil cylinder rodless cavity valve group oil inlet
Valve, the oil-out of the balanced valve is connected to the oil inlet and pressure balance hydraulic fluid port of pipeline explosion-proof valve, the pipeline explosion-proof valve
Oil-out is connected to oil cylinder rodless cavity safety valve oil inlet, oil cylinder rodless cavity pressure measurement exhaust joint oil inlet and oil cylinder rodless cavity and entered
Hydraulic fluid port.
Further, the cylinder rod chamber valve group of control mouth of the described rod chamber control oil circuit including being connected to balanced valve is entered
Hydraulic fluid port, the rod chamber valve group oil inlet is additionally coupled to the oil inlet of check valve II and the oil-out of check valve I；It is described unidirectional
The oil-out of valve II is connected to the oil inlet of choke valve, and the oil-out of the choke valve is connected to entering for cylinder rod chamber safety valve
Hydraulic fluid port, the oil inlet of cylinder rod chamber pressure measurement exhaust joint, the oil inlet of check valve I and cylinder rod chamber oil inlet；It is described
The oil-out of oil cylinder rodless cavity safety valve is connected to the oil-out and safety valve oil return opening of cylinder rod chamber safety valve.
The beneficial effects of the invention are as follows：By be provided with integrated control valve group balanced valve, pipeline explosion-proof valve, safety valve,
Pressure measurement exhaust joint, check valve, choke valve, and with pressure balance oil circuit and correspondence hydraulic fluid port, with reach jacking cylinder integrated security,
Speed governing, pressure measurement exhaust, explosion-proof pipeline, balance locking, twin-tub pressure balance function are reclaimed, is greatly improved under each operating mode of main frame
The security reliability of work, and versatility is more preferably.
Brief description of the drawings
Fig. 1 is hydraulic principle figure structure schematic representation of the present invention；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is structure top view of the present invention.
In figure：1st, balanced valve, 2, pipeline explosion-proof valve, 3, oil cylinder rodless cavity safety valve, 4, oil cylinder rodless cavity pressure measurement exhaust connects
Head, 5, jacking cylinder, 6, cylinder rod chamber pressure measurement exhaust joint, 7, cylinder rod chamber safety valve, 8, check valve I, 9, throttling
Valve, 10, check valve II, 11, pipeline II, 12, integrated control valve group, 13, pipeline I, A1, oil cylinder rodless cavity valve group oil inlet,
A2, pressure balance hydraulic fluid port, B, cylinder rod chamber valve group oil inlet, Y, safety valve oil return opening, C, oil cylinder rodless cavity oil inlet, D, oil
Cylinder rod chamber oil inlet.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of control oil circuit of function integrated-type large-tonnage tower crane jacking cylinder, including by balanced valve 1, pipe
The rodless cavity oil circuit that road explosion-proof valve 2, oil cylinder rodless cavity safety valve 3, oil cylinder rodless cavity pressure measurement exhaust joint 4 are constituted, and by oil
What cylinder rod chamber pressure measurement exhaust joint 6, cylinder rod chamber safety valve 7, check valve I 8, choke valve 9, check valve II 10 were constituted has bar
Chamber oil circuit；Described rodless cavity oil circuit includes the balanced valve 1 that oil inlet is connected to oil cylinder rodless cavity valve group oil inlet A1, described flat
The oil-out of weighing apparatus valve 1 is connected to the oil inlet and pressure balance hydraulic fluid port A2 of pipeline explosion-proof valve 2, the pipeline explosion-proof valve 2 it is fuel-displaced
Mouth is connected to oil inlet, the oil inlet and oil cylinder rodless cavity of oil cylinder rodless cavity pressure measurement exhaust joint 4 of oil cylinder rodless cavity safety valve 3
Oil inlet C；Described rod chamber oil circuit includes the cylinder rod chamber valve group oil inlet B for being connected to the control mouth of balanced valve 1, the oil
Cylinder rod chamber valve group oil inlet B is additionally coupled to the oil inlet of check valve II 10 and the oil-out of check valve I 8；The check valve
II 10 oil-out is connected to the oil inlet of choke valve 9, and the oil-out of the choke valve 9 is connected to cylinder rod chamber safety valve 7
Oil inlet, the oil inlet of cylinder rod chamber pressure measurement exhaust joint 6, the oil inlet of check valve I 8 and cylinder rod chamber oil inlet
D；The oil-out of the oil cylinder rodless cavity safety valve 3 is connected to the oil-out and safety valve oil return opening of cylinder rod chamber safety valve 7
Y。
As shown in Figures 2 and 3, a kind of function integrated-type large-tonnage tower crane jacking cylinder, including jacking cylinder 5 and integrated control
Valve group 12 processed, the rodless cavity that the rodless cavity of the jacking cylinder 5 is connected to integrated control valve group 12 by pipeline I 13 controls oil
Road, the rod chamber that the rod chamber of the jacking cylinder 5 is connected to integrated control valve group by pipeline II 11 controls oil circuit.
Further, described rodless cavity control oil circuit is connected to the flat of oil cylinder rodless cavity valve group oil inlet A1 including oil inlet
Weigh valve 1, and the oil-out of the balanced valve 1 is connected to the oil inlet and pressure balance hydraulic fluid port A2 of pipeline explosion-proof valve 2, and the pipeline is prevented
The oil-out of quick-fried valve 2 is connected to the oil inlet of oil cylinder rodless cavity safety valve 3, the oil inlet of oil cylinder rodless cavity pressure measurement exhaust joint 4
And oil cylinder rodless cavity oil inlet C.
Further, described rod chamber control oil circuit enters including being connected to the cylinder rod chamber valve group of the control mouth of balanced valve 1
Hydraulic fluid port B, the cylinder rod chamber valve group oil inlet B be additionally coupled to check valve II 10 oil inlet and check valve I 8 it is fuel-displaced
Mouthful；The oil-out of the check valve II 10 is connected to the oil inlet of choke valve 9, and the oil-out of the choke valve 9 is connected to oil cylinder
Oil inlet, the oil inlet of cylinder rod chamber pressure measurement exhaust joint 6, the oil inlet and oil of check valve I 8 of rod chamber safety valve 7
Cylinder rod chamber oil inlet D；The oil-out of the oil cylinder rodless cavity safety valve 3 is connected to the oil-out of cylinder rod chamber safety valve 7
And safety valve oil return opening Y.
Working condition of the present invention is as follows：
Stretching state：Working media passes through oil cylinder rodless cavity valve group oil inlet A1, balanced valve 1, pipeline explosion-proof valve 2, oil cylinder rodless
Chamber oil inlet C enters the rodless cavity of jacking cylinder 5, and driving jacking cylinder 5 stretches out；The working media of the rod chamber of jacking cylinder 5
Flowed out by cylinder rod chamber safety valve 7 and cylinder rod chamber valve group oil inlet B.Now, 3 safety of oil cylinder rodless cavity safety valve
Protective effect；Oil cylinder rodless cavity pressure measurement exhaust joint 4 is used for operating pressure and the discharge oil cylinder two for monitoring oil cylinder rodless cavity in real time
The air contained in chamber fluid；When pressure balance hydraulic fluid port A2 can realize that multi-cylinder synchronous stretches out, the rodless cavity pressure of every oil cylinder
Unanimously, the synchronization of jacking up and decline of oil cylinder are conducive to.
Retracted state：Working media has by cylinder rod chamber valve group oil inlet B, check valve II 10, choke valve 9, oil cylinder
Rod cavity oil inlet D enters the rod chamber of jacking cylinder 5, and driving jacking cylinder 5 bounces back；The work of the rodless cavity of jacking cylinder 5 is situated between
Matter is by pipeline explosion-proof valve 2, balanced valve 1, oil cylinder rodless cavity valve group oil inlet A1 outflows.Now, check valve II 10 and choke valve 9
Speed adjustment unit is constituted, the recovery speed of jacking cylinder 5, cylinder rod chamber safety valve 7 can be adjusted and play safeguard protection, oil cylinder
Rod chamber pressure measurement exhaust joint 6 is used for the operating pressure for monitoring the rod chamber of jacking cylinder 5 in real time and contained in discharge rod chamber fluid
Some air, balanced valve 1, which serve, prevents oil cylinder from declining " stall ".In addition, when balanced valve 1 fails, pipeline explosion-proof valve 2 can
The rodless cavity oil circuit of locked jacking cylinder 5, prevents the downslide out of control of jacking cylinder 5.
Halted state：It is locked that the rodless cavity of jacking cylinder 5 is balanced valve 1, it is ensured that what jacking cylinder 5 stopped at an arbitrary position
It is reliable and stable.
In summary, effect of the present invention is obvious, convenient use, by being provided with balanced valve, pipeline in integrated control valve group
Explosion-proof valve, safety valve, pressure measurement exhaust joint, check valve, choke valve, and with pressure balance oil circuit and correspondence hydraulic fluid port, to reach top
Oil-lifting jar integrated security, recovery speed governing, pressure measurement exhaust, explosion-proof pipeline, balance locking, twin-tub pressure balance function, are greatly carried
The security reliability worked under each operating mode of main frame has been risen, and versatility is more preferably.
Claims (4)
1. a kind of control oil circuit of function integrated-type large-tonnage tower crane jacking cylinder, it is characterised in that including by balanced valve（1）、
Pipeline explosion-proof valve（2）, oil cylinder rodless cavity safety valve（3）, oil cylinder rodless cavity pressure measurement exhaust joint（4）The rodless cavity oil circuit of composition,
And by cylinder rod chamber pressure measurement exhaust joint（6）, cylinder rod chamber safety valve（7）, check valve I（8）, choke valve（9）, it is unidirectional
Valve II（10）The rod chamber oil circuit of composition；Described rodless cavity oil circuit is connected to oil cylinder rodless cavity valve group oil inlet including oil inlet
（A1）Balanced valve（1）, the balanced valve（1）Oil-out be connected to pipeline explosion-proof valve（2）Oil inlet and pressure balance oil
Mouthful（A2）, the pipeline explosion-proof valve（2）Oil-out be connected to oil cylinder rodless cavity safety valve（3）Oil inlet, oil cylinder rodless cavity
Pressure measurement exhaust joint（4）Oil inlet and oil cylinder rodless cavity oil inlet（C）；Described rod chamber oil circuit includes being connected to balanced valve
（1）The cylinder rod chamber valve group oil inlet of control mouth（B）, the cylinder rod chamber valve group oil inlet（B）It is additionally coupled to check valve
Ⅱ（10）Oil inlet and check valve I（8）Oil-out；The check valve II（10）Oil-out be connected to choke valve（9）
Oil inlet, the choke valve（9）Oil-out be connected to cylinder rod chamber safety valve（7）Oil inlet, cylinder rod chamber survey
Press exhaust joint（6）Oil inlet, check valve I（8）Oil inlet and cylinder rod chamber oil inlet（D）；The oil cylinder rodless
Chamber safety valve（3）Oil-out be connected to cylinder rod chamber safety valve（7）Oil-out and safety valve oil return opening（Y）.
2. a kind of a kind of function integrated-type large-tonnage tower crane jacking cylinder, it is characterised in that ore deposit described in usage right requirement 1
With dumper hydraulic auxiliary brake system, and including jacking cylinder（5）And integrated control valve group（12）, the jacking cylinder（5）
Rodless cavity pass through pipeline I（13）It is connected to integrated control valve group（12）Rodless cavity control oil circuit, the jacking cylinder（5）'s
Rod chamber passes through pipeline II（11）It is connected to the rod chamber control oil circuit of integrated control valve group.
3. a kind of function integrated-type large-tonnage tower crane jacking cylinder according to claim 2, it is characterised in that described nothing
Rod cavity control oil circuit is connected to oil cylinder rodless cavity valve group oil inlet including oil inlet（A1）Balanced valve 1, the balanced valve（1）'s
Oil-out is connected to pipeline explosion-proof valve（2）Oil inlet and pressure balance hydraulic fluid port（A2）, the pipeline explosion-proof valve（2）Oil-out
It is connected to oil cylinder rodless cavity safety valve（3）Oil inlet, oil cylinder rodless cavity pressure measurement exhaust joint（4）Oil inlet and oil cylinder rodless
Chamber oil inlet（C）.
4. a kind of function integrated-type large-tonnage tower crane jacking cylinder according to claim 2, it is characterised in that described has
Rod cavity control oil circuit includes being connected to balanced valve（1）The cylinder rod chamber valve group oil inlet of control mouth（B）, the cylinder rod chamber
Valve group oil inlet（B）It is additionally coupled to check valve II（10）Oil inlet and check valve I（8）Oil-out；The check valve II
（10）Oil-out be connected to choke valve（9）Oil inlet, the choke valve（9）Oil-out be connected to cylinder rod chamber safety
Valve（7）Oil inlet, cylinder rod chamber pressure measurement exhaust joint（6）Oil inlet, check valve I（8）Oil inlet and oil cylinder have
Rod cavity oil inlet（D）；The oil cylinder rodless cavity safety valve（3）Oil-out be connected to cylinder rod chamber safety valve（7）It is fuel-displaced
Mouth and safety valve oil return opening（Y）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601014.2A CN107165881B (en) | 2017-07-21 | 2017-07-21 | A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601014.2A CN107165881B (en) | 2017-07-21 | 2017-07-21 | A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165881A true CN107165881A (en) | 2017-09-15 |
| CN107165881B CN107165881B (en) | 2019-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710601014.2A Active CN107165881B (en) | 2017-07-21 | 2017-07-21 | A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555743A (en) * | 2018-12-11 | 2019-04-02 | 中联重科股份有限公司 | Control system for oil cylinder and engineering machinery |
| CN109595210A (en) * | 2018-12-26 | 2019-04-09 | 河海大学常州校区 | A kind of explosion-proof valve module of Combined oil cylinder |
| CN112443534A (en) * | 2020-12-10 | 2021-03-05 | 徐州徐工液压件有限公司 | Cylinder valve integrated type standardized heavy-load lifting oil cylinder structure |
| CN113251012A (en) * | 2021-06-04 | 2021-08-13 | 萨驰智能装备股份有限公司 | Explosion-proof hydraulic system and tire vulcanizer |
| CN113803324A (en) * | 2021-08-16 | 2021-12-17 | 南京智真电子科技股份有限公司 | A self-locking oil cylinder with a balance valve locked at both ends |
| CN114212721A (en) * | 2021-12-13 | 2022-03-22 | 徐州徐工液压件有限公司 | Combined control valve with emergency lowering function and capable of preventing tower crane jacking sleeve frame from being damaged |
| CN115263838A (en) * | 2022-07-29 | 2022-11-01 | 徐州徐工液压件有限公司 | Three-cylinder synchronous tower crane jacking hydraulic system capable of being controlled conveniently |
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| CN105221500A (en) * | 2015-10-22 | 2016-01-06 | 浙江大学 | The TBM rear support hydraulic system of single double pump pattern switching and pressurize |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1560482A (en) * | 2004-03-12 | 2005-01-05 | 浙江大学 | Shield tunneling machine hydraulic propulsion system using proportional flow pressure compound control |
| DE102004063044A1 (en) * | 2004-12-22 | 2006-07-06 | Sauer-Danfoss Aps | Hydraulic control |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555743A (en) * | 2018-12-11 | 2019-04-02 | 中联重科股份有限公司 | Control system for oil cylinder and engineering machinery |
| CN109555743B (en) * | 2018-12-11 | 2020-05-22 | 中联重科股份有限公司 | Control system for oil cylinder and engineering machinery |
| CN109595210A (en) * | 2018-12-26 | 2019-04-09 | 河海大学常州校区 | A kind of explosion-proof valve module of Combined oil cylinder |
| CN112443534A (en) * | 2020-12-10 | 2021-03-05 | 徐州徐工液压件有限公司 | Cylinder valve integrated type standardized heavy-load lifting oil cylinder structure |
| CN113251012A (en) * | 2021-06-04 | 2021-08-13 | 萨驰智能装备股份有限公司 | Explosion-proof hydraulic system and tire vulcanizer |
| CN113803324A (en) * | 2021-08-16 | 2021-12-17 | 南京智真电子科技股份有限公司 | A self-locking oil cylinder with a balance valve locked at both ends |
| CN114212721A (en) * | 2021-12-13 | 2022-03-22 | 徐州徐工液压件有限公司 | Combined control valve with emergency lowering function and capable of preventing tower crane jacking sleeve frame from being damaged |
| CN114212721B (en) * | 2021-12-13 | 2024-06-07 | 徐州徐工液压件有限公司 | Combined control valve with emergency lowering function and capable of preventing damage to jacking sleeve frame of tower crane |
| CN115263838A (en) * | 2022-07-29 | 2022-11-01 | 徐州徐工液压件有限公司 | Three-cylinder synchronous tower crane jacking hydraulic system capable of being controlled conveniently |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107165881B (en) | 2019-03-15 |
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