CN110030222A - Its hydraulic system of a kind of differential hydraulic control loop of fluid control valve and application - Google Patents
Its hydraulic system of a kind of differential hydraulic control loop of fluid control valve and application Download PDFInfo
- Publication number
- CN110030222A CN110030222A CN201910406968.7A CN201910406968A CN110030222A CN 110030222 A CN110030222 A CN 110030222A CN 201910406968 A CN201910406968 A CN 201910406968A CN 110030222 A CN110030222 A CN 110030222A
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- valve
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- hydraulic control
- throttle valve
- hydraulic
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- 239000012530 fluid Substances 0.000 title claims abstract description 31
- 239000000446 fuel Substances 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 51
- 239000007788 liquid Substances 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 206010020852 Hypertonia Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
-
- 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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to hydraulic control system fields, it is related to the differential hydraulic control loop and application its hydraulic system of a kind of fluid control valve, including hydraulic control valve station and its attachment, the attachment includes solenoid directional control valve, the first one-way throttle valve, the first hydraulic control one-way valve, check valve, the second hydraulic control one-way valve, the second one-way throttle valve, third one-way throttle valve；The P mouth of the solenoid directional control valve, which is connected to high pressure fuel source, T mouthful and is connected to main oil returning tube, A mouthful, is connected to the one-way conduction end of the second one-way throttle valve, the B mouthfuls of one-way conduction ends for being connected to third one-way throttle valve；Second hydraulic control one-way valve is connected on the pipeline between check valve and the second one-way throttle valve, third one-way throttle valve；Action request when so that the energy consumptions such as flow when fluid control valve closes valve events reduce by more than 50, reducing the investment and operating cost of system dynamic source and emergency power supply, and being suitable for hydraulic sluice valve switch gate.
Description
Technical field
The invention belongs to hydraulic control system field, it is related to a kind of differential hydraulic control loop of fluid control valve and using it
Hydraulic system.
Background technique
Fluid control valve is widely used in the coal gas or other media pipe control link in the regions such as blast furnace in metallurgical industry, converter
Valve arrangement.Such as hot-blast valve, mixed wind stop valve, refluence damping down valve of hot-blast stove etc..Hydraulic control is generallyd use, that is, is passed through
Pressure oil controls the opening and closing of the flexible realization gate valve plate of hydraulic cylinder, plays and opens or closes air or other media pipe path
Effect.Moreover, requiring the safety that gate valve emergency cut-off is guaranteed to whole system under many operating conditions.
Such as the hot-blast valve and mixed wind stop valve of blast-furnace hot-air furnace system, power failure or other failures occurs in hot blast stove system
When, it usually needs these two types of gate valves are closed in a short time, otherwise, may cause accident, cause hot-blast stove explosion etc. serious
Safety accident.
In normal conditions, hydraulic system works normally, and the equipment such as continual valve into system provide pressure
Oil, the fluid control valve in system can be required according to program or personnel operate and require normal opening and closing in time；Hydraulic butterfly valve it is hydraulic
Control loop is usually the superposition valve group composition of electromagnetism (electro-hydraulic) reversal valve, hydraulic control one-way valve, oil return one-way throttle valve composition,
During normal switching-off, since counterweight is usually lighter than valve plate, the load that oil cylinder is born is negative load, and when valve closing must lean on
The back pressure of rod cavity meter out controls closing velocity, bears load caused by valve plate to overcome, causes system energy consumption larger, be also easy
Cause rod cavity superpressure phenomenon；In addition, hydraulic oil source can not be provided when the accidents such as hydraulic system failure or generation power failure,
The accumulator usually in hydraulic system is as emergency power supply at this time, by gate valve emergency cut-off.Since gate valve is usually big logical
Diameter valve, cylinder sizes are larger, and stroke is longer, it is desirable that the accident accumulator in system must have enough volumes and it is higher can
By property, higher cost.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of differential hydraulic control loop of fluid control valve and applying its
Traditional hydraulic sluice valve control loop is improved to Differential Control circuit by hydraulic system, reduces energy consumption when gate valve is closed.
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of differential hydraulic control loop of fluid control valve, including hydraulic control valve station and its attachment, the attachment include
Solenoid directional control valve, the first one-way throttle valve, the first hydraulic control one-way valve, check valve, the second hydraulic control one-way valve, the second one-way throttle
Valve, third one-way throttle valve；The P mouth of the solenoid directional control valve be connected to high pressure fuel source, T mouthful be connected to main oil returning tube, A mouthfuls it is logical
The conduction terminal for crossing check valve is connected to that the one-way conduction end of the second one-way throttle valve, B mouthfuls by the sealed end of one-way throttle valve,
One hydraulic control one-way valve is connected to the one-way conduction end of third one-way throttle valve；The control oil of first hydraulic control one-way valve is connected to electromagnetism
A mouthfuls of reversal valve, the second hydraulic control one-way valve are connected to the pipeline between check valve and the second one-way throttle valve, third one-way throttle valve
On；Conduction terminal connection B chamber, the sealed end of second hydraulic control one-way valve connect A chamber.
Optionally, gate valve oil cylinder of the connection with gate valve counterweight between the A chamber and the B chamber.
Optionally, second throttle connection gate valve cylinder rod chamber, third throttle valve are connected to gate valve oil cylinder rodless cavity.
Optionally, control port is connected to B chamber.
Optionally, drain tap is connected to the main draining pipeline at hydraulic control valve station.
Optionally, solenoid directional control valve, the first one-way throttle valve, the first hydraulic control one-way valve, check valve are all made of Sandwich plate valve.
A kind of hydraulic system, using the differential hydraulic control loop of above-mentioned fluid control valve.
The gate valve plate of a kind of differential hydraulic control method of fluid control valve, the fluid control valve passes through chain and gate valve counterweight
Connection, gate valve counterweight are connect with the piston rod head of gate valve oil cylinder, the differential hydraulic control loop applied to above-mentioned fluid control valve.
Optionally, when solenoid directional control valve electromagnet b obtains electric, high pressure liquid pressure oil arrives A mouthfuls by the P mouth of solenoid directional control valve,
By check valve, the check valve of the second one-way throttle valve, into the rod chamber of gate valve oil cylinder；The hydraulic oil of oil cylinder rodless cavity then leads to
Cross the throttle valve of third one-way throttle valve, the first hydraulic control one-way valve, the check valve of the first one-way throttle valve, solenoid directional control valve B
Mouth arrives T mouthfuls of oil returns.
Optionally, when solenoid directional control valve electromagnet a obtains electric, high pressure liquid pressure oil passes through the P mouth of solenoid directional control valve to B mouthfuls, then
By the throttle valve of the first one-way throttle valve, the first hydraulic control one-way valve, third one-way throttle valve check valve, into gate valve oil cylinder
Rodless cavity；Because the reversed cut-off of check valve acts on, the hydraulic oil of cylinder rod chamber can only pass through the section of the second one-way throttle valve
Valve, the second hydraulic control one-way valve inflow B chamber are flowed, is formed differential.
The beneficial effects of the present invention are:
(1) when gate valve is closed, Differential Control makes system that flow to be offered be needed there was only the half in existing circuit, can play drop
Low power system capacity reduces system heat generation and energy-efficient purpose.
(2) the oily volume that the accumulator that need to meet an urgent need when gate valve emergency cut-off provides also only needs original half, saves throwing
Provide cost and operating cost.
(3) differential circuit for adapting to gate valve action request is realized by superposition valve group and inserting check valve, structure is simple, at
This is lower.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target of the invention and other advantages can be realized by following specification and
It obtains.
Detailed description of the invention
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing excellent
The detailed description of choosing, in which:
Fig. 1 is hydraulic system overall schematic of the invention；
Fig. 2 is hydraulic system overall schematic in the prior art；
Fig. 3 is the differential hydraulic control loop schematic diagram of the fluid control valve in the present invention.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that diagram provided in following embodiment is only to show
Meaning mode illustrates basic conception of the invention, and in the absence of conflict, the feature in following embodiment and embodiment can phase
Mutually combination.
Wherein, the drawings are for illustrative purposes only and are merely schematic diagrams, rather than pictorial diagram, should not be understood as to this
The limitation of invention；Embodiment in order to better illustrate the present invention, the certain components of attached drawing have omission, zoom in or out, not
Represent the size of actual product；It will be understood by those skilled in the art that certain known features and its explanation may be omitted and be in attached drawing
It is understood that.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention；It is retouched in of the invention
In stating, it is to be understood that if there is the orientation or positional relationship of the instructions such as term " on ", "lower", "left", "right", "front", "rear"
To be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description of the present invention and simplification of the description, rather than indicate or
It implies that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore is described in attached drawing
The term of positional relationship only for illustration, is not considered as limiting the invention, for the ordinary skill of this field
For personnel, the concrete meaning of above-mentioned term can be understood as the case may be.
Please refer to Fig. 1-Fig. 3, the element numbers in attached drawing respectively indicate: gate valve plate 1, gate valve counterweight 2, gate valve oil cylinder 3,
Hydraulic control valve station 4, solenoid directional control valve 4.1, the first one-way throttle valve 4.2, the first hydraulic control one-way valve 4.3, check valve 4.4,
Two hydraulic control one-way valves 4.5, the second one-way throttle valve 4.6, third one-way throttle valve 4.7.
The present invention relates to a kind of differential hydraulic control loop of fluid control valve, including hydraulic control valve station 4 and its attachment, institutes
Stating attachment includes solenoid directional control valve 4.1, the first one-way throttle valve 4.2, the first hydraulic control one-way valve 4.3, check valve 4.4, the second liquid
Control check valve 4.5, the second one-way throttle valve 4.6, third one-way throttle valve 4.7；The P mouth of the solenoid directional control valve 4.1 is connected to
High pressure fuel source, T mouthful are connected to main oil returning tube, A mouthfuls and are connected to the second one-way throttle valve 4.6 by the conduction terminal of check valve 4.4
One-way conduction end, B mouthfuls third one-way throttle valve is connected to by sealed end, the first hydraulic control one-way valve 4.3 of one-way throttle valve
4.7 one-way conduction end；The control oil of first hydraulic control one-way valve 4.3 is connected to 4.1A mouthfuls of solenoid directional control valve, the second fluid-control one-way
Valve 4.5 is connected on the pipeline between check valve 4.4 and the second one-way throttle valve 4.6, third one-way throttle valve 4.7；Second liquid
Conduction terminal connection B chamber, the sealed end for controlling check valve 4.5 connect A chamber.
Optionally, gate valve oil cylinder 3 of the connection with gate valve counterweight 2 between the A chamber and the B chamber；Second throttle connects
3 rod chamber of pass gate valve oil cylinder, third throttle valve are connected to 3 rodless cavity of gate valve oil cylinder；Control port is connected to B chamber；Hydraulic fluid port connection
To the main draining pipeline at hydraulic control valve station 4；Solenoid directional control valve 4.1, the first one-way throttle valve 4.2, the first hydraulic control one-way valve
4.3, check valve 4.4 is all made of Sandwich plate valve.
And a kind of hydraulic system, using the differential hydraulic control loop of above-mentioned fluid control valve.
And a kind of differential hydraulic control method of fluid control valve, the gate valve plate 1 of the fluid control valve pass through chain and lock
Valve counterweight 2 connects, and gate valve counterweight 2 is connect with the piston rod head of gate valve oil cylinder 3, the differential hydraulic applied to above-mentioned fluid control valve
Control loop.
Optionally, when 4.1 electromagnet b of solenoid directional control valve obtains electric, high pressure liquid pressure oil passes through the P mouth of solenoid directional control valve 4.1
To A mouthfuls, by check valve 4.4, the check valve 4.4 of the second one-way throttle valve 4.6, into the rod chamber of gate valve oil cylinder 3；Oil cylinder without
The hydraulic oil of rod cavity then passes through the throttle valve of third one-way throttle valve 4.7, the first hydraulic control one-way valve 4.3, the first one-way throttle valve
4.2 check valve 4.4, the B mouth of solenoid directional control valve 4.1 arrive T mouthfuls of oil returns.
At this point, the first hydraulic control one-way valve 4.3 is opened under the effect of high pressure guide oil, and the list of the first one-way throttle valve 4.2
It is connected to valve 4.4, the B chamber of hydraulic station is low pressure, and A chamber is high pressure because being oil inlet side, so that the second hydraulic control one-way valve 4.5 is anti-
To cut-off side be high pressure, guide oil is low pressure, can not be opened, which is in close state.In cylinder rod chamber high pressure oil and lock
Valve counterweight 2, under the collective effect of the meter out of third one-way throttle valve 4.7, oil cylinder is at the uniform velocity retracted, pull-up valve plate, opens lock
Valve.
Optionally, when 4.1 electromagnet a of solenoid directional control valve obtains electric, high pressure liquid pressure oil arrives B by the P mouth of solenoid directional control valve 4.1
Mouthful, using the throttle valve of the first one-way throttle valve 4.2, the first hydraulic control one-way valve 4.3, third one-way throttle valve 4.7 it is unidirectional
Valve 4.4, into the rodless cavity of gate valve oil cylinder 3；Because the reversed cut-off of check valve 4.4 acts on, the hydraulic oil of cylinder rod chamber can only
B chamber is flowed by the throttle valve of the second one-way throttle valve 4.6, the second hydraulic control one-way valve 4.5, is formed differential.
At this point, B chamber is oil inlet side, pilot control oil opens the second hydraulic control one-way valve 4.5 and forms differential circuit, hydraulic station
A chamber, B chamber, 3 rodless cavity pressure of gate valve oil cylinder it is identical.And the meter out of the second one-way throttle valve 4.6 acts on having before valve
Between the A chamber of hydraulic station behind rod cavity side and valve, a pressure difference is formd to overcome negative load force caused by valve plate；Together
When, since the meter in of the first one-way throttle valve 4.2 acts on, the B cavity pressure of system pressure and hydraulic station forms pressure
Difference avoids the A chamber, B chamber, 3 rodless cavity hypertonia of gate valve oil cylinder of hydraulic station, that is, while forming differential circuit, and
The pressure for having matched 3 rodless cavity of gate valve oil cylinder and rod chamber load, achievees the purpose that prevent rod cavity superpressure.In oil cylinder rodless cavity pressure
And under rod chamber back pressure and the collective effect of gate valve plate 1, oil cylinder stretches out, and jacks up gate valve counterweight 2 and at the uniform velocity puts down valve plate, closes lock
Valve.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Scope of the claims in.
Claims (10)
1. a kind of differential hydraulic control loop of fluid control valve, it is characterised in that: described including hydraulic control valve station and its attachment
Attachment includes solenoid directional control valve, the first one-way throttle valve, the first hydraulic control one-way valve, check valve, the second hydraulic control one-way valve, the second list
To throttle valve, third one-way throttle valve；The P mouth of the solenoid directional control valve is connected to high pressure fuel source, T mouthful and is connected to main oil return pipe
Road, A mouthfuls are connected to that the one-way conduction end of the second one-way throttle valve, B mouthfuls by one-way throttle valve by the conduction terminal of check valve
Sealed end, the first hydraulic control one-way valve are connected to the one-way conduction end of third one-way throttle valve；The control oil of first hydraulic control one-way valve
It is connected to A mouthfuls of solenoid directional control valve, the second hydraulic control one-way valve is connected to check valve and the second one-way throttle valve, third one-way throttle valve
Between pipeline on；Conduction terminal connection B chamber, the sealed end of second hydraulic control one-way valve connect A chamber.
2. the differential hydraulic control loop of fluid control valve as described in claim 1, it is characterised in that: the A chamber and the B
Connection has the gate valve oil cylinder of gate valve counterweight between chamber.
3. the differential hydraulic control loop of fluid control valve as described in claim 2, it is characterised in that: second throttle connection
Gate valve cylinder rod chamber, third throttle valve are connected to gate valve oil cylinder rodless cavity.
4. the differential hydraulic control loop of fluid control valve as described in claim 1, it is characterised in that: control port and B chamber
Connection.
5. the differential hydraulic control loop of fluid control valve as described in claim 1, it is characterised in that: drain tap is connected to liquid
The main draining pipeline at pressure control valve station.
6. the differential hydraulic control loop of fluid control valve as described in claim 1, it is characterised in that: solenoid directional control valve,
One one-way throttle valve, the first hydraulic control one-way valve, check valve are all made of Sandwich plate valve.
7. a kind of hydraulic system, it is characterised in that: using the differential of the fluid control valve as described in any one of claim 1~6
Hydraulic control circuit.
8. the gate valve plate of a kind of differential hydraulic control method of fluid control valve, the fluid control valve matches reconnection by chain and gate valve
It connects, gate valve counterweight is connect with the piston rod head of gate valve oil cylinder, it is characterised in that: apply hydraulic control as described in claim 3
The differential hydraulic control loop of gate valve.
9. the differential hydraulic control method of fluid control valve as described in claim 8, it is characterised in that: when solenoid directional control valve electricity
When magnet b obtains electric, high pressure liquid pressure oil arrives A mouthfuls by the P mouth of solenoid directional control valve, passes through check valve, the list of the second one-way throttle valve
To valve, into the rod chamber of gate valve oil cylinder；The hydraulic oil of oil cylinder rodless cavity then passes through the throttle valve of third one-way throttle valve, and first
Hydraulic control one-way valve, the check valve of the first one-way throttle valve, solenoid directional control valve B mouth arrive T mouthfuls of oil returns.
10. the differential hydraulic control method of fluid control valve as described in claim 8, it is characterised in that: solenoid directional control valve electricity
When magnet a obtains electric, high pressure liquid pressure oil by P mouth of solenoid directional control valve to B mouthfuls, using the throttle valve of the first one-way throttle valve,
The check valve of first hydraulic control one-way valve, third one-way throttle valve, into the rodless cavity of gate valve oil cylinder；Because of the reversed cut-off of check valve
The hydraulic oil of effect, cylinder rod chamber can only flow into B chamber by throttle valve, the second hydraulic control one-way valve of the second one-way throttle valve,
It is formed differential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910406968.7A CN110030222B (en) | 2019-05-16 | 2019-05-16 | Differential hydraulic control loop of hydraulic control gate valve and hydraulic system using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910406968.7A CN110030222B (en) | 2019-05-16 | 2019-05-16 | Differential hydraulic control loop of hydraulic control gate valve and hydraulic system using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110030222A true CN110030222A (en) | 2019-07-19 |
| CN110030222B CN110030222B (en) | 2024-02-23 |
Family
ID=67242335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910406968.7A Active CN110030222B (en) | 2019-05-16 | 2019-05-16 | Differential hydraulic control loop of hydraulic control gate valve and hydraulic system using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110030222B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010059738A (en) * | 2008-09-05 | 2010-03-18 | Caterpillar Japan Ltd | Hydraulic control circuit of working machine |
| CN103603840A (en) * | 2013-11-26 | 2014-02-26 | 三一汽车制造有限公司 | Integrated hydraulic valve group and hydraulic drive system and concrete pump |
| CN103883578A (en) * | 2014-02-26 | 2014-06-25 | 中国重型机械研究院股份公司 | Novel hydraulic control system for sliding gate |
| CN204041574U (en) * | 2014-07-16 | 2014-12-24 | 唐山渤海冶金设备有限责任公司 | A kind of withdrawal straightening machine depress oil cylinder hydraulic control system |
| CN106979373A (en) * | 2017-05-15 | 2017-07-25 | 中治赛迪装备有限公司 | The low impact hydraulic control system and its control method of a kind of big orifice hydraulic gate valve |
| CN207349553U (en) * | 2017-10-30 | 2018-05-11 | 中冶赛迪装备有限公司 | One kind automatically shuts down hydraulic butterfly valve |
| CN209800394U (en) * | 2019-05-16 | 2019-12-17 | 中冶赛迪工程技术股份有限公司 | differential hydraulic control loop of hydraulic control gate valve and hydraulic system applying differential hydraulic control loop |
-
2019
- 2019-05-16 CN CN201910406968.7A patent/CN110030222B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010059738A (en) * | 2008-09-05 | 2010-03-18 | Caterpillar Japan Ltd | Hydraulic control circuit of working machine |
| CN103603840A (en) * | 2013-11-26 | 2014-02-26 | 三一汽车制造有限公司 | Integrated hydraulic valve group and hydraulic drive system and concrete pump |
| CN103883578A (en) * | 2014-02-26 | 2014-06-25 | 中国重型机械研究院股份公司 | Novel hydraulic control system for sliding gate |
| CN204041574U (en) * | 2014-07-16 | 2014-12-24 | 唐山渤海冶金设备有限责任公司 | A kind of withdrawal straightening machine depress oil cylinder hydraulic control system |
| CN106979373A (en) * | 2017-05-15 | 2017-07-25 | 中治赛迪装备有限公司 | The low impact hydraulic control system and its control method of a kind of big orifice hydraulic gate valve |
| CN207349553U (en) * | 2017-10-30 | 2018-05-11 | 中冶赛迪装备有限公司 | One kind automatically shuts down hydraulic butterfly valve |
| CN209800394U (en) * | 2019-05-16 | 2019-12-17 | 中冶赛迪工程技术股份有限公司 | differential hydraulic control loop of hydraulic control gate valve and hydraulic system applying differential hydraulic control loop |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110030222B (en) | 2024-02-23 |
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