CN205446223U - Prevent hydraulic control return circuit of decompression - Google Patents
Prevent hydraulic control return circuit of decompression Download PDFInfo
- Publication number
- CN205446223U CN205446223U CN201620211915.1U CN201620211915U CN205446223U CN 205446223 U CN205446223 U CN 205446223U CN 201620211915 U CN201620211915 U CN 201620211915U CN 205446223 U CN205446223 U CN 205446223U
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- valve
- control
- hydraulic cylinder
- decompression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model provides a prevent hydraulic control return circuit of decompression, the hydraulic control return circuit cuts off hydraulic circuit including integrated pneumatic cylinder with the oil circuit at least, integrated pneumatic cylinder includes pneumatic cylinder and pneumatic cylinder integrated valve block, pneumatic cylinder integrated valve block install in it opens locking hydraulic cylinder when stopping with system's decompression to be used for controlling the pneumatic cylinder on the pneumatic cylinder, pneumatic cylinder integrated valve block with the oil circuit cuts off and cuts off when hydraulic circuit is continuous to be used for controlling pneumatic cylinder action and system's decompression the oil circuit of pneumatic cylinder. The utility model has the characteristics of pneumatic cylinder installation direction and load pattern soon, are not limit in simple structure, safe and reliable, accident response to the ability is controlled with the predictability that outside pressure monitoring unites the implementation system accident, and when the control system accident had a power failure, the pneumatic cylinder will be at safe lock -out state. The occasion that has higher requirement when being applicable to system's decompression to pneumatic cylinder off -position state.
Description
Technical field
This utility model belongs to mechanical engineering technical field, particularly relates to prevent in the lifting process of metallurgical equipment, engineering machinery, heavy vehicle the hydraulic control circuit of hydraulic cylinder decompression.
Background technology
Hydraulic control circuit is made up of several Hydraulic Elements (hydraulic power unit or hydraulic power supply, conduit under fluid pressure, control valve platform and hydraulic cylinder), it is used for having controlled the oil channel structures of specific function, is widely used in mechanical engineering technical field such as metallurgical equipment, engineering machinery, heavy vehicles.In the hydraulic control circuit of these equipment, there is the lifting of a large amount of hydraulic cylinder control loop, its feature is that load is relatively big, work under bad environment, cause hydraulic control component or the easy aging explosion of hydraulic cylinder external pipe particularly flexible pipe, cause system accident decompression, be susceptible to great falling accident.In order to avoid falling accident occurs, hydraulic system typically requires and arranges corresponding o-volt protection measure.
But; o-volt protection scheme many employings explosion-proof valve that existing hydraulic cylinder is arranged, i.e. by installing explosion-proof valve between hydraulic cylinder and flexible pipe, when entering the pipeline generation explosion of explosion-proof valve; the fluid of the explosion-proof valve confining liquid cylinder pressure by arranging, thus the security incident caused when preventing because of decompression.Explosion-proof valve forward is normal circulation, is reversely improper circulation, the spring pressure that the pressure differential at explosion-proof valve two ends can not set in being more than explosion-proof valve when its improper circulation, otherwise cannot reverse flow.The operation principle of explosion-proof valve determines that the spring pressure of explosion-proof valve arranges must be rationally, if arranging unreasonable, it is possible to occur cannot cutting off rapidly oil circuit when hydraulic cylinder decrease speed is relatively slow or fault occurs, thus increase the weight of accident (Crash) severity.It addition, explosion-proof valve be the pressure differential by two chambeies to lock hydraulic cylinder, be more suitable for the occasion having normal load, during for horizontal load or without the hydraulic cylinder decompression of external loading, it is impossible to effectively lock Position of Hydraulic Cylinder.Meanwhile, by the way of pressure differential controls opening and closing, there is also the probability of misoperation.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide the hydraulic control circuit of a kind of anti-decompression, the scope in loop is controlled except existing explosion-proof valve decompression can be comprised, it is additionally operable to solve hydraulic control circuit in prior art, during in horizontal load or without the hydraulic cylinder decompression of external loading, it is impossible to the problem effectively locking Position of Hydraulic Cylinder；It addition, when control system accidental power failure, the predictability being in safe lock-out state combining with external pressure monitoring and realizing systematic failures is controlled by hydraulic cylinder.
For achieving the above object and other relevant purposes, this utility model provides the hydraulic control circuit of a kind of anti-decompression, including:
Described hydraulic control circuit at least includes that integrated hydraulic cylinder cuts off hydraulic circuit with oil circuit, described integrated hydraulic cylinder includes hydraulic cylinder and hydraulic cylinder integrated valve block, described hydraulic cylinder integrated valve block is installed on described hydraulic cylinder for controlling hydraulic cylinder start and stop and locking hydraulic cylinder during system decompression, and described hydraulic cylinder integrated valve block and described oil circuit cut-out hydraulic circuit are connected and cut off the oil circuit of described hydraulic cylinder for hydraulic pressure time not normal.
Preferably, described hydraulic cylinder integrated valve block includes the first control valve, the first hydraulic control one-way valve and the second hydraulic control one-way valve, first hydraulic fluid port of described first control valve connects one end of described first hydraulic control one-way valve, and the other end of described first hydraulic control one-way valve connects the rodless cavity of described hydraulic cylinder；Second hydraulic fluid port of described first control valve connects one end of described second hydraulic control one-way valve, and the other end of described second hydraulic control one-way valve connects the rod chamber of described hydraulic cylinder.
Preferably, described oil circuit cuts off hydraulic circuit and includes the second control valve, first hydraulic fluid port of described second control valve connects the first hydraulic fluid port of external power supply, second hydraulic fluid port of described second control valve connects the second hydraulic fluid port of described external power supply, 3rd hydraulic fluid port of described second control valve connects the 3rd hydraulic fluid port of described first control valve, and the 4th hydraulic fluid port of described first control valve connects the second hydraulic fluid port of described external power supply.
Preferably, described first control valve is any one in solenoid directional control valve, electro-hydraulic reversing valve, inserted valve, proportioning valve or servo valve.
Preferably, described second control valve is any one in Solenoid seated valve, solenoid directional control valve, electro-hydraulic reversing valve or inserted valve.
Preferably, described hydraulic cylinder integrated valve block also includes overflow valve and check valve, described overflow valve is installed between described first hydraulic control one-way valve and the rodless cavity of described hydraulic cylinder for pressure release, and described check valve is installed between described second hydraulic control one-way valve and the rod chamber of described hydraulic cylinder for repairing；Or, described check valve is installed between described first hydraulic control one-way valve and the rodless cavity of described hydraulic cylinder for repairing, and described overflow valve is installed between described second hydraulic control one-way valve and the rod chamber of described hydraulic cylinder for pressure release.
Preferably, described first control valve, described second control valve are equipped with the pressure tap measuring pressure with described hydraulic cylinder in its hydraulic fluid port junction.
As it has been described above, the hydraulic control circuit of anti-decompression of the present utility model, have the advantages that
(1) this utility model provides the hydraulic control circuit of a kind of anti-decompression of simple and reliable hydraulic cylinder, there is simple in construction, the feature that safe and reliable, incident response is fast, and the predictability control realizing systematic failures can be combined with external pressure monitoring, and when control system accidental power failure, hydraulic cylinder will be in safe lock-out state.Occasion when being applicable to hydraulic cylinder decompression, hydraulic cylinder off-position state being had higher requirements.
(2) this utility model need not manually arrange hydraulic control valve spring force, reduces the impact on systematic function of the hydraulic control system artificial technological disparity.
(3) hydraulic cylinder installation direction and load pattern are not limited by this utility model, have expanded the range of application of existing explosion-proof valve o-volt protection hydraulic control circuit.
Accompanying drawing explanation
Fig. 1 is shown as the hydraulic control circuit schematic diagram of anti-decompression of the present utility model；
Fig. 2 is shown as the hydraulic control circuit example structure block diagram of anti-decompression of the present utility model.
Element numbers illustrates:
1 hydraulic cylinder
2 hydraulic cylinder integrated valve blocks
3 oil circuits cut off hydraulic circuit
4 power sources
5 first control valves
6 first hydraulic control one-way valves
7 second hydraulic control one-way valves
8 second control valves
9 overflow valves
10 check valves
R1 flexible pipe
R2 hard tube
T1～T6 pressure tap
Detailed description of the invention
Below by way of specific instantiation, embodiment of the present utility model being described, those skilled in the art can be understood other advantages of the present utility model and effect easily by the content disclosed by this specification.This utility model can also be carried out by the most different detailed description of the invention or apply, and the every details in this specification can also carry out various modification or change based on different viewpoints and application under without departing from spirit of the present utility model.It should be noted that, in the case of not conflicting, the feature in following example and embodiment can be mutually combined.
It should be noted that, diagram provided in following example illustrates basic conception of the present utility model the most in a schematic way, component count, shape and size when only showing the assembly relevant with this utility model rather than implement according to reality in the most graphic are drawn, during its actual enforcement, the kenel of each assembly, quantity and ratio can be a kind of random change, and its assembly layout kenel is likely to increasingly complex.
Refer to Fig. 1, this utility model provides the hydraulic control circuit schematic diagram of a kind of anti-decompression, described hydraulic control circuit at least includes that integrated hydraulic cylinder cuts off hydraulic circuit 3 with oil circuit, described integrated hydraulic cylinder includes hydraulic cylinder 1 and hydraulic cylinder integrated valve block 2, described hydraulic cylinder integrated valve block 2 is installed on described hydraulic cylinder 1 for controlling hydraulic cylinder start and stop (start and stop) and locking hydraulic cylinder 1 during system decompression, described hydraulic cylinder integrated valve block 2 cuts off hydraulic circuit 3 with described oil circuit and is connected, described oil circuit cuts off hydraulic circuit 3 and is connected with external power supply 4, the oil circuit of described hydraulic cylinder 1 is cut off when system decompression.
Wherein, described hydraulic cylinder integrated valve block 2, described oil circuit cut off hydraulic circuit 3 and all use pipeline to be connected with the connected mode of described external power supply 4, and this pipeline includes flexible pipe R1, hard tube R2 etc.；It addition, in this application, all preferably pipeline of the connected mode between all devices connects.
Being provided with hydraulic cylinder integrated valve block 2 on described hydraulic cylinder 1, it is specific as follows that described hydraulic cylinder integrated valve block 2 and described oil circuit cut off hydraulic circuit 3:
Described hydraulic cylinder integrated valve block 2 includes the first control valve the 5, first hydraulic control one-way valve 6 and the second hydraulic control one-way valve 7, first hydraulic fluid port of described first control valve 5 connects one end of described first hydraulic control one-way valve 6, and the other end of described first hydraulic control one-way valve 6 connects the rodless cavity of described hydraulic cylinder 1；Second hydraulic fluid port of described first control valve 5 connects one end of described second hydraulic control one-way valve 7, the other end of described second hydraulic control one-way valve 7 connects the rod chamber of described hydraulic cylinder 1, according to its control instruction after the first control valve 5 receives the action command of hydraulic cylinder 1, control the commutation of the first control valve 5, it is achieved the controlled state to hydraulic cylinder 1.
Described oil circuit cuts off hydraulic circuit 3 and includes the second control valve 8; first hydraulic fluid port of described second control valve 8 connects the first hydraulic fluid port of external power supply 4; second hydraulic fluid port of described second control valve 8 connects the second hydraulic fluid port of described external power supply 4; 3rd hydraulic fluid port of described second control valve 8 connects the 3rd hydraulic fluid port of described first control valve 5; 4th hydraulic fluid port of described first control valve 5 connects the second hydraulic fluid port of described external power supply 4; realize hydraulic pressure break-make by the second control valve 8 commutation, thus control the switching of the duty of hydraulic cylinder 1, shutdown or accident condition.
Wherein, described first control valve 5 is any one in solenoid directional control valve, electro-hydraulic reversing valve, inserted valve, proportioning valve or servo valve；Described second control valve 8 is any one in Solenoid seated valve, solenoid directional control valve, electro-hydraulic reversing valve or inserted valve.
Specifically, described hydraulic cylinder integrated valve block 2 also includes overflow valve 9 and check valve 10, described overflow valve 9 is installed between described first hydraulic control one-way valve 6 and the rodless cavity of described hydraulic cylinder 1 for pressure release, and described check valve 10 is installed between described second hydraulic control one-way valve 7 and the rod chamber of described hydraulic cylinder 1 for repairing；Or, described check valve 10 is installed between described first hydraulic control one-way valve 6 and the rodless cavity of described hydraulic cylinder 1 for repairing, and described overflow valve 9 is installed between described second hydraulic control one-way valve 7 and the rod chamber of described hydraulic cylinder 1 for pressure release.
The position that described overflow valve 9 is installed with check valve 10 is interchangeable, in this example, hydraulic cylinder 1 is made it have the trend of retraction by foreign impacts or other failure cause, when causing its hydraulic cylinder 1 rodless cavity pressure more than the safe pressure born, hydraulic cylinder 1 can pass through overflow valve 9 overflow, reduces the purpose of risk；When being emptied occurs in the rod chamber of described hydraulic cylinder 1; the check valve 10 rod chamber repairing to hydraulic cylinder 1 can be passed through; thus arrive the purpose of protection; otherwise; when being emptied occurs in the rodless cavity of hydraulic cylinder 1, the check valve 10 rodless cavity repairing to hydraulic cylinder 1 can be passed through, when hydraulic cylinder 1 rod chamber pressure is more than the safe pressure born; hydraulic cylinder 1 can pass through overflow valve 9 overflow, reduces the purpose of risk.
Specifically, described first control valve 5, described second control valve 8 and described hydraulic cylinder 1 are equipped with the pressure tap (can be connected Pressure gauge) measuring pressure in its hydraulic fluid port junction, in the present embodiment, the first control valve the 5, second control valve 8 and hydraulic cylinder 1 pressure can be detected at any time, for the monitoring of attendant by the pressure tap arranged.
Referring to Fig. 2, for the hydraulic control circuit example structure block diagram of anti-decompression of the present utility model, wherein, the first preferred solenoid directional control valve of control valve 5 in this embodiment, the second control valve 8 is preferably Solenoid seated valve, and concrete attachment structure is as follows:
Described hydraulic cylinder integrated valve block 2 includes solenoid directional control valve, the first hydraulic control one-way valve 6 and the second hydraulic control one-way valve 7, first hydraulic fluid port of described solenoid directional control valve connects one end of described first hydraulic control one-way valve 6, and the other end of described first hydraulic control one-way valve 6 connects the rodless cavity of described hydraulic cylinder 1；Second hydraulic fluid port of described solenoid directional control valve connects one end of described second hydraulic control one-way valve 7, and the other end of described second hydraulic control one-way valve 7 connects the rod chamber of described hydraulic cylinder 1.
It is provided with the overflow valve 9 for pressure release between described first hydraulic control one-way valve 6 and the rodless cavity of described hydraulic cylinder 1, it is provided with the check valve for repairing between described second hydraulic control one-way valve 7 and the rod chamber of described hydraulic cylinder 1, wherein, one end of overflow valve 9 is connected on the pipeline between described first hydraulic control one-way valve 6 and the rodless cavity of described hydraulic cylinder 1, and its other end is connected on the pipeline of the 4th hydraulic fluid port of described solenoid directional control valve and the second hydraulic fluid port of external power supply 4；One end of check valve is connected on the pipeline between described second hydraulic control one-way valve 7 and the rod chamber of described hydraulic cylinder 1, and its other end is connected on the pipeline of the 4th hydraulic fluid port of described solenoid directional control valve and the second hydraulic fluid port of external power supply 4.
Described oil circuit cuts off hydraulic circuit 3 and includes Solenoid seated valve, first hydraulic fluid port of described Solenoid seated valve connects the first hydraulic fluid port of external power supply 4, second hydraulic fluid port of described Solenoid seated valve connects the second hydraulic fluid port of described external power supply 4,3rd hydraulic fluid port of described Solenoid seated valve is connected the 3rd hydraulic fluid port of described solenoid directional control valve by hard tube with the combination of flexible pipe, and the 4th hydraulic fluid port of described solenoid directional control valve is connected the second hydraulic fluid port of described external power supply 4 by hard tube with the combination of flexible pipe.
Wherein, 3rd hydraulic fluid port of Solenoid seated valve is provided with pressure tap T1, second hydraulic fluid port pipeline of the 4th hydraulic fluid port connection external power supply 4 of solenoid directional control valve is provided with pressure tap T2, the pipeline of the 3rd hydraulic fluid port connection Solenoid seated valve of solenoid directional control valve is provided with pressure tap T3, the 4th hydraulic fluid port of solenoid directional control valve connect overflow valve 9 and check valve pipeline on be provided with pressure tap T4, the pipeline that hydraulic cylinder 1 connects the first hydraulic control one-way valve 6 is provided with pressure tap T5, the pipeline that hydraulic cylinder 1 connects the second hydraulic control one-way valve 7 is provided with pressure tap T6.
In this example, when external control system generation power outage, described Solenoid seated valve and the equal power-off of electric magnet of described solenoid directional control valve, it is impossible to produce electromagnetic force；Meanwhile, the spool of described solenoid directional control valve is in middle position, and the first hydraulic fluid port, the second hydraulic fluid port and the 4th hydraulic fluid port that solenoid directional control valve is connected with hydraulic cylinder are connected and be in passive state；The spool of Solenoid seated valve is also at dead electricity position, second hydraulic fluid port of the 3rd hydraulic fluid port of the Solenoid seated valve being connected with solenoid directional control valve and external power supply is connected, first hydraulic control one-way valve 6 and the second hydraulic control one-way valve 7 are closed, hydraulic control circuit is caused to be off-state by the oil circuit of hydraulic cylinder 1, until power recovery just enters reset state.
In the present embodiment, when flexible pipe explosion or system decompression, hydraulic control circuit occurs abnormal the pressure anomaly of the pressure tap T1, T3, T5 or the T6 that i.e. arrange in hydraulic control circuit (time), the oil circuit control pressure of first and second hydraulic control one-way valve declines, first hydraulic control one-way valve the 6, second hydraulic control one-way valve 7 is directly closed, and reaches to lock the purpose of hydraulic cylinder 1.Additionally, when pressure anomaly in the pressure tap detection hydraulic control circuit that external power supply 4 is arranged, cutting off the second control valve 8 in hydraulic circuit 3 by oil circuit control makes oil circuit cut off the oil circuit pressure supply of hydraulic cylinder 1, reach directly to cut off the purpose of hydraulic cylinder 1 oil circuit supply, thus lock hydraulic cylinder 1, prevent its decompression from causing security incident.
In sum, this utility model is by arranging the first control valve so that it is commutation reaches break-make pipeline oil pressure；Pipeline can be automatically switched off according to loine pressure by described first and second hydraulic control one-way valve arranged, effectively prevent and cause, because of oil pressure decompression, security incidents such as falling, reached the effect of protection personnel and equipment；Meanwhile, the oil circuit being connected between power source and hydraulic cylinder integrated valve block cuts off hydraulic circuit, can cut off the oil pressure supply of hydraulic cylinder according to control signal, and be provided with overflow valve and check valve in the inside of hydraulic cylinder integrated valve block, can prevent hydraulic cylinder superpressure and be emptied.This utility model has simple in construction relative to prior art, safe and reliable, incident response soon, does not limit hydraulic cylinder installation direction and the feature of load pattern, and can combine with external pressure monitoring and realize the predictability of systematic failures and control.And when control system accidental power failure, hydraulic cylinder will be in safe lock-out state.Occasion when being applicable to hydraulic cylinder decompression, hydraulic cylinder off-position state being had higher requirements.So, this utility model effectively overcomes various shortcoming of the prior art and has high industrial utilization.
Above-described embodiment only illustrative principle of the present utility model and effect thereof, not for limiting this utility model.Above-described embodiment all can be modified under spirit and the scope of the present utility model or change by any person skilled in the art.Therefore, art has all equivalence modification or changes that usually intellectual is completed under without departing from the spirit disclosed in this utility model and technological thought such as, must be contained by claim of the present utility model.
Claims (7)
1. the hydraulic control circuit of an anti-decompression, it is characterized in that, described hydraulic control circuit at least includes that integrated hydraulic cylinder cuts off hydraulic circuit with oil circuit, described integrated hydraulic cylinder includes hydraulic cylinder and hydraulic cylinder integrated valve block, described hydraulic cylinder integrated valve block is installed on described hydraulic cylinder for controlling hydraulic cylinder start and stop and locking hydraulic cylinder during system decompression, and described hydraulic cylinder integrated valve block and described oil circuit cut-out hydraulic circuit are connected and cut off the oil circuit of described hydraulic cylinder when system decompression.
The hydraulic control circuit of anti-decompression the most according to claim 1, it is characterized in that, described hydraulic cylinder integrated valve block includes the first control valve, the first hydraulic control one-way valve and the second hydraulic control one-way valve, first hydraulic fluid port of described first control valve connects one end of described first hydraulic control one-way valve, and the other end of described first hydraulic control one-way valve connects the rodless cavity of described hydraulic cylinder；Second hydraulic fluid port of described first control valve connects one end of described second hydraulic control one-way valve, and the other end of described second hydraulic control one-way valve connects the rod chamber of described hydraulic cylinder.
The hydraulic control circuit of anti-decompression the most according to claim 2, it is characterized in that, described oil circuit cuts off hydraulic circuit and includes the second control valve, first hydraulic fluid port of described second control valve connects the first hydraulic fluid port of external power supply, second hydraulic fluid port of described second control valve connects the second hydraulic fluid port of described external power supply, 3rd hydraulic fluid port of described second control valve connects the 3rd hydraulic fluid port of described first control valve, and the 4th hydraulic fluid port of described first control valve connects the second hydraulic fluid port of described external power supply.
The hydraulic control circuit of anti-decompression the most according to claim 2, it is characterised in that described first control valve is any one in solenoid directional control valve, electro-hydraulic reversing valve, inserted valve, proportioning valve or servo valve.
The hydraulic control circuit of anti-decompression the most according to claim 3, it is characterised in that described second control valve is any one in Solenoid seated valve, solenoid directional control valve, electro-hydraulic reversing valve or inserted valve.
The hydraulic control circuit of anti-decompression the most according to claim 2, it is characterized in that, described hydraulic cylinder integrated valve block also includes overflow valve and check valve, described overflow valve is installed between described first hydraulic control one-way valve and the rodless cavity of described hydraulic cylinder for pressure release, and described check valve is installed between described second hydraulic control one-way valve and the rod chamber of described hydraulic cylinder for repairing；Or, described check valve is installed between described first hydraulic control one-way valve and the rodless cavity of described hydraulic cylinder for repairing, and described overflow valve is installed between described second hydraulic control one-way valve and the rod chamber of described hydraulic cylinder for pressure release.
The hydraulic control circuit of anti-decompression the most according to claim 3, it is characterised in that described first control valve, described second control valve and described hydraulic cylinder are equipped with the pressure tap measuring pressure in its hydraulic fluid port junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620211915.1U CN205446223U (en) | 2016-03-18 | 2016-03-18 | Prevent hydraulic control return circuit of decompression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620211915.1U CN205446223U (en) | 2016-03-18 | 2016-03-18 | Prevent hydraulic control return circuit of decompression |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205446223U true CN205446223U (en) | 2016-08-10 |
Family
ID=56604039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620211915.1U Active CN205446223U (en) | 2016-03-18 | 2016-03-18 | Prevent hydraulic control return circuit of decompression |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205446223U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605002A (en) * | 2016-03-18 | 2016-05-25 | 中冶赛迪工程技术股份有限公司 | Decompression-preventing hydraulic control loop and method thereof |
-
2016
- 2016-03-18 CN CN201620211915.1U patent/CN205446223U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605002A (en) * | 2016-03-18 | 2016-05-25 | 中冶赛迪工程技术股份有限公司 | Decompression-preventing hydraulic control loop and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105605002B (en) | The hydraulic control circuit and its method of anti-decompression | |
| CN108217376B (en) | A kind of proportional pressure control valve perseverance deceleration safety arrestment redundant hydraulic station and its control method | |
| CN107109824B (en) | The control system of construction implement | |
| CN109154153B (en) | Safety system for construction machine | |
| CN109268347B (en) | Generator set and steam turbine interruption early warning system thereof | |
| LU101711B1 (en) | Multi-channel impact-resistant intelligent-constant-decelaration hydraulic braking system | |
| CN103697001B (en) | Engineering machinery and hydraulic driving system thereof | |
| CN108286542B (en) | A kind of hydraulic buttery valve card valve fault monitoring device | |
| CN205446223U (en) | Prevent hydraulic control return circuit of decompression | |
| CN102434529B (en) | Hydraulic cylinder expansion control loop and engineering mechanical equipment | |
| CN103994111B (en) | A kind of hydraulic bolt lift platform hydraulic control system | |
| CN103883578B (en) | A kind of slide gate nozzle hydraulic control system | |
| CN203756630U (en) | Novel sliding nozzle hydraulic control system | |
| CN201496345U (en) | Pipeline bursting online security continuous work system of hydraulic equipment | |
| CN100504958C (en) | Six freedom motion simulator trouble protector and withdrawing device | |
| CN201580876U (en) | Hydraulic station device for mine hoister | |
| EP1610051A2 (en) | Manually operated piloted control-reliable lockout valve | |
| CN110240067B (en) | Shore bridge tilting-hanging integrated electrohydraulic control system and control method thereof | |
| CN211145175U (en) | Control assembly for hydraulic clutch | |
| CN103287998B (en) | A kind of anchor winch pumping station controlling system | |
| CN104141652A (en) | Hydraulic loading equipment fault protecting device | |
| CN202358844U (en) | Liquid control handle of crane and crane | |
| CN216807925U (en) | Winch anti-collision device and workover rig comprising same | |
| CN110259848B (en) | Control assembly of hydraulic clutch | |
| CN102745156B (en) | Advanced protecting system and advanced protecting method for support legs of demountable tanker carrier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |