CN108087366A - A kind of flow divider valve for single-pump system - Google Patents
A kind of flow divider valve for single-pump system Download PDFInfo
- Publication number
- CN108087366A CN108087366A CN201810073706.9A CN201810073706A CN108087366A CN 108087366 A CN108087366 A CN 108087366A CN 201810073706 A CN201810073706 A CN 201810073706A CN 108087366 A CN108087366 A CN 108087366A
- Authority
- CN
- China
- Prior art keywords
- valve
- flow
- oil outlet
- main
- control chamber
- 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.)
- Granted
Links
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
- F15B13/026—Pressure compensating valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to a kind of flow divider valves for single-pump system, it is characterised in that：Including valve block, valve block is equipped with oil inlet, oil outlet, main oil outlet and oil return opening；First passage, first passage is interior to be equipped with preferential compensating spool；Two-position two-way solenoid valve is connected with oil return opening or connected with main oil outlet to switch main control chamber；Spill valve, after main control cavity pressure reaches certain value, spill valve is opened, and main control chamber is connected with oil return opening；Flow-rate adjustment valve module, on valve block, to control the output flow of main oil outlet.It is a kind of flow divider valve for single-pump system that is simple and reasonable, easy to process, can simplifying single pump hydraulic system structure, can be effectively reduced cost using single pump hydraulic system after the distributing valve, and then effectively reduce complete machine cost.
Description
Technical field
Technical field more particularly to a kind of flow divider valve for single-pump system the invention belongs to hydraulic valve.
Background technology
In modern industrial machinery and walking machine hydraulic system, generally there are multiple executing agencies or according to actual feelings
Condition needs to meet the needs of a tractor serves several purposes and configure increasing additional work device, and these multiple executing agencies or not
The hydraulic flow that same additional equipment needs is different, such as：The executing agency's demand having in same hydraulic system
Metered flow is only the 1/3-1/2 of hydraulic system total flow, and the metered flow of some executing agency's demands will be the total of system
Flow.If using load sensing variable pump systems, the range of flow provided is wide, and good energy-conserving effect, but system is manufactured into
This height, assembling, maintenance difficulty are big, are not easy to ensure.Using Constant Pump System, metered flow much larger than some executing agencies or
The traffic requirement of additional work device, system mismatch；If necessary to increase special pumping source, manufacture cost will be increased, and
System also becomes more complicated.
How to simplify single pump hydraulic system structure therefore, it is that those skilled in the art need the skill solved to reduce complete machine cost
Art problem.
The content of the invention
The technical problems to be solved by the invention be for the above-mentioned prior art present situation and provide it is a kind of it is simple and reasonable,
The flow divider valve for single-pump system easy to process, that single pump hydraulic system structure can be simplified, using the list after the distributing valve
Pump hydraulic system can effectively reduce cost, and then effectively reduce complete machine cost.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of assignment of traffic for single-pump system
Valve, it is characterised in that：Including valve block, valve block is equipped with oil inlet, oil outlet, main oil outlet and oil return opening；First passage, first
There is the primary valve to connect oil inlet and main oil outlet, the secondary valve port to connect oil inlet and oil outlet on passage；It is excellent
First compensating spool can simultaneously slide arranged on first passage, and preferential compensating spool is equipped with to block the main shoulder block of primary valve and use
To block the secondary shoulder block of time valve port, the first passage of preferential compensating spool one end forms main control chamber, and preferential compensating spool is another
The first passage at end forms secondary control chamber, and preferential compensating spool is internally provided with the first flow of connection primary valve and secondary control chamber,
Main control intracavitary is equipped with the first spring that time shoulder block is made to keep closure time valve port trend；Two-position two-way solenoid valve, on valve block,
Two-position two-way solenoid valve is connected switching main control chamber with oil return opening or connected with main oil outlet；Spill valve is arranged on
On valve block, after main control cavity pressure reaches certain value, spill valve is opened, and main control chamber is connected with oil return opening；Flow
Valve assembly, on valve block, to control the output flow of main oil outlet.
As an improvement, the first damper with damping hole is equipped in above-mentioned first flow.Ensure that preferential compensating spool is put down
Stable sliding moves.
As an improvement, interior be equipped with of runner between above-mentioned two-position two-way solenoid valve and main oil outlet has the second of damping hole
Damper.Ensure that preferential compensating spool steadily slides.
Preferably, the both ends of above-mentioned first passage are respectively equipped with the first main screw plug and the closure of first time screw plug, the first master
Main control chamber is formed between screw plug and preferential compensating spool, secondary control chamber is formed between first time screw plug and preferential compensating spool.
Preferably, above-mentioned Flow-rate adjustment valve module includes swivel nut and flow control rod, it is provided with to connect master on valve block
First through flow hole of oil outlet and primary valve, the flow control rod are threaded through in swivel nut and can slide, outside flow control rod
End be threaded on swivel nut and it is overhanging be threadedly coupled with locking nut, be provided on the flow control rod periphery wall with first lead to
The first annular slot of discharge orifice cooperation, the degree overlapped by first annular slot with the first through flow hole determine the output stream of main oil outlet
Amount.The function that this Flow-rate adjustment valve module is completed is that the openings of sizes of the first through flow hole is controlled by flow control rod, so as to control
Make the output flow of main oil outlet.
Preferably, above-mentioned spill valve includes valve pocket, poppet valve core, second spring and overflow valve adjusting rod, on valve pocket
The overflow valve port of connection valve pocket inner cavity and main control chamber is provided with, valve pocket inner cavity is connected with oil return opening, and the poppet valve core is arranged on valve pocket
Inner cavity simultaneously has second spring to hold holding to block overflow valve port trend, and the overflow valve adjusting rod is threaded on valve pocket simultaneously
It is contradicted with poppet valve core.
Compared with prior art, the advantage of the invention is that：When two-position two-way solenoid valve obtains it is electric when, preferential compensating spool court
Secondary valve port direction mobile trend becomes apparent from, and the flow set up by Flow-rate adjustment valve module preferentially supplies main oil outlet, remaining
Excess traffic flows into multi-way valve or reversal valve by oil outlet, and the preferential valve module that compensates is to ensure to set up according to Flow-rate adjustment valve module
Flow pressure compensation is carried out to the flow of main oil outlet, ensure that acceptor's oil outlet load variation does not influence output flow, and excellent
First supply main oil outlet (namely when the traffic demand of oil outlet and the second oil outlet will not cause greatly the flow of main oil outlet by
It influences).If during main oil outlet pressure overload, spill valve is returned the fluid overflow of main control chamber to oil return opening, then is preferentially mended
It repays spool and even completely closes primary valve to close to the movement of primary valve direction to reduce the output flow of main oil outlet；Bi-bit bi-pass
When solenoid valve must not be electric, control chamber is connected with oil return opening, and preferential compensating spool closes main valve under the pressure effect of oil inlet
Mouthful, the flow of oil inlet is all exported by oil outlet, and main oil outlet is without flow.It so can be by automatically controlled convenient realization to master
The control of oil outlet flow output.By the flow divider valve in walking machine hydraulic system, without expensive load
Variable pump systems are sensed, also targetedly can suit reason automatically according to different executing agencies or different additional equipments
Flow is distributed, can be effectively reduced cost using single pump hydraulic system after the distributing valve, and then effectively reduce complete machine cost.
Description of the drawings
Fig. 1 is the sectional view of the embodiment of the present invention；
Fig. 2 is the sectional view along A-A of Fig. 1；
Fig. 3 is the hydraulic schematic diagram of the embodiment of the present invention；
Fig. 4 is the embodiment of the present invention using hydraulic schematic diagram.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
As shown in figures 1-4, it is a preferred embodiment of the present invention.
A kind of flow divider valve for single-pump system, including
Valve block 1, valve block 1 are equipped with oil inlet P, oil outlet B, main oil outlet A and oil return inlet T；
First passage 11, have on first passage 11 to connect oil inlet P and main oil outlet A primary valve 1c, to
Connect oil inlet P and the secondary valve port 1d of oil outlet B1；
Preferential compensating spool 3a, arranged on first passage 11 and can slide, and preferential compensating spool 3a is equipped with to block master
The main shoulder block 3a1 of the valve port 1c and secondary shoulder block 3a2 to block secondary valve port 1d, the first passage of preferential compensating spool 3a one end
Main control chamber 1a is formed, the first passage of the preferential compensating spool 3a other ends is formed in secondary control chamber 1b, preferential compensating spool 3a
Portion is equipped with the first flow 31 of connection primary valve 1c and secondary control chamber 1b, and the first resistance with damping hole is equipped in first flow 31
The first spring 4a that time shoulder block 3a2 is made to keep closure time valve port 1d trend is equipped in Buddhist nun device 7a, main control chamber 1a；First passage 11
Both ends be respectively equipped with the first main screw plug 8a and first time screw plug 9a closure, between the first main screw plug 8a and preferential compensating spool 3a
Main control chamber 1a is formed, secondary control chamber 1b is formed between first time screw plug 9a and preferential compensating spool 3a.
Two-position two-way solenoid valve 10, on valve block 1, two-position two-way solenoid valve 10 is switching main control chamber 1a and oil return
Mouth T connections are connected with main oil outlet A；Being equipped in runner between two-position two-way solenoid valve 10 and main oil outlet A has resistance
The second damper 7b in Buddhist nun hole.
Spill valve 5, on valve block 1, after pressure reaches certain value in main control chamber 1a, spill valve 5 is opened
It opens, main control chamber 1a is connected with oil return inlet T；Spill valve 5 includes valve pocket 51, poppet valve core 52, second spring 53 and overflow valve
Adjusting rod 54 is provided with connection 51 inner cavity of valve pocket and the overflow valve port 511 of main control chamber 1a, 51 inner cavity of valve pocket and oil return on valve pocket 51
Mouth T connections, poppet valve core 52, which is arranged on 51 inner cavity of valve pocket and has second spring 53 to hold holding, blocks 511 trend of overflow valve port, institute
Overflow valve adjusting rod 54 is stated to be threaded on valve pocket 51 and contradict with poppet valve core 52.
Flow-rate adjustment valve module 6, on valve block 1, to control the output flow of main oil outlet A.Flow-rate adjustment valve group
Part 6 includes swivel nut 61 and flow control rod 62, is provided on valve block 1 to connect main oil outlet A and the first of primary valve 1c through-flow
Hole 611, flow control rod 62 are threaded through in swivel nut 61 and can slide, and the outer end of flow control rod 62 is threaded on swivel nut 61
And it is overhanging be threadedly coupled with locking nut 63, be provided on 62 periphery wall of flow control rod and the first through flow hole 611 cooperation
First annular slot 621, the degree overlapped by first annular slot 621 with the first through flow hole 611 determine the output stream of main oil outlet A
Amount.
The operation principle and process of this flow divider valve are as follows：
The function that Flow-rate adjustment valve module 6 is completed is to control the opening of the first through flow hole 611 big by flow control rod 62
It is small, so as to control the output flow of main oil outlet A；The function of preferential compensation valve module is by by Flow-rate adjustment valve module 6
The pressure of oil inlet introduces secondary control chamber 1b, and the pressure of the oil outlet (i.e. main oil outlet A) of Flow-rate adjustment valve module 6 is introduced master
Control chamber 1a is respectively acting on the left and right ends of preferential compensating spool 3a, compared with the first spring 4a, to ensure main control
Pressure difference is constant (namely pressure difference is constant before and after Flow-rate adjustment valve module 6) before and after chamber 1a and secondary control chamber 1b.
1st, when two-position two-way solenoid valve 10 must not electricity when, main control chamber 1a is by the valve port of two-position two-way solenoid valve 10 and returns
Hydraulic fluid port T-phase is led to；The fluid of oil inlet P after primary valve 1c, first flow 31 into secondary control chamber 1b, preferential compensating spool 3a to
It moves left, primary valve 1c is essentially off by main shoulder block 3a1 thereon, only keeps minute opening to ensure that preferential compensating spool 3a is left
The pressure of shifting, and secondary valve port 1d standard-sized sheets, fluid all flow into oil outlet B by oil inlet P.
2nd, when two-position two-way solenoid valve 10 it is electric when, main control chamber 1a passes through 10 inner flow passage of two-position two-way solenoid valve and the
It is communicated after two damper 7b with main oil outlet A, no longer returns oil return inlet T, the pressure of such main control chamber 1a is main oil outlet A pressure
Reaction, preferential compensating spool 3a realizes pressure compensation (maintaining pressure difference constant so as to ensure that output flow is stablized) and preferentially
Ensure the output flow of main oil outlet A, if that is, main oil outlet A flows be not achieved Flow-rate adjustment valve module 6 adjusting flow
When, the pressure difference of secondary control chamber 1b and main control chamber 1a are smaller, and preferential compensating spool 3a is moved to right under the active force of the first spring 4a,
Secondary shoulder block 3a2 all covers in secondary valve port 1d, and oil inlet P all flows into main oil outlet A.
In use, as shown in figure 4, the oil inlet P in the present embodiment is connected with the hydraulic pump outlet of hydraulic system；This reality
It applies the oil outlet B of example and is connected with the multi-way valve in hydraulic system or reversal valve import, main oil outlet A connections needs control
It is less than executing agency's either hydraulic pressure accessory of single-pump flow to traffic demand；Oil return inlet T is direct connected tank oil return.
Claims (6)
1. a kind of flow divider valve for single-pump system, it is characterised in that：Including
Valve block (1), valve block (1) are equipped with oil inlet (P), oil outlet (B), main oil outlet (A) and oil return opening (T)；
First passage (11) has the primary valve for connecting oil inlet (P) and main oil outlet (A) on first passage (11)
(1c), the secondary valve port (1d) to connect oil inlet (P) and oil outlet (B)；
Preferential compensating spool (3a), arranged on first passage (11) and can slide, and preferential compensating spool (3a) is equipped with to block
The main shoulder block (3a1) of primary valve (1c) and the secondary shoulder block (3a2) to block time valve port (1d), preferential compensating spool (3a) one
The first passage at end forms main control chamber (1a), and the first passage of preferential compensating spool (3a) other end forms secondary control chamber
(1b), preferential compensating spool (3a) are internally provided with the first flow (31) of connection primary valve (1c) and secondary control chamber (1b), master control
The first spring (4a) that time shoulder block (3a2) is made to keep closure time valve port (1d) trend is equipped in chamber (1a) processed；
Two-position two-way solenoid valve (10), on valve block (1), two-position two-way solenoid valve (10) to switch main control chamber (1a) with
Oil return opening (T) is connected or connected with main oil outlet (A)；
Spill valve (5), on valve block (1), after main control chamber (1a) interior pressure reaches certain value, spill valve
(5) open, main control chamber (1a) is connected with oil return opening (T)；
Flow-rate adjustment valve module (6), on valve block (1), to control the output flow of main oil outlet (A).
2. a kind of flow divider valve for single-pump system according to claim 1, it is characterised in that：The first flow
(31) the first damper (7a) with damping hole is equipped in.
3. a kind of flow divider valve for single-pump system according to claim 1, it is characterised in that：The bi-bit bi-pass
The second damper (7b) with damping hole is equipped in runner between solenoid valve (4) and main oil outlet (A).
4. a kind of flow divider valve for single-pump system according to claim 1, it is characterised in that：The first passage
(11) both ends are respectively equipped with the first main screw plug (8a) and first time screw plug (9a) closure, the first main screw plug (8a) and preferential compensation
Main control chamber (1a) is formed between spool (3a), secondary control chamber is formed between first time screw plug (9a) and preferential compensating spool (3a)
(1b)。
5. a kind of flow divider valve for single-pump system according to claim 1, it is characterised in that：The flow-rate adjustment
Valve module (6) includes swivel nut (61) and flow control rod (62), be provided on the valve block (1) to connect main oil outlet (A) and
The first through flow hole (611) of primary valve (1c), the flow control rod (62) are threaded through in swivel nut (61) and can slide, flow tune
The outer end of pole (62) be threaded on swivel nut (61) and it is overhanging be threadedly coupled with locking nut (63), the flow control rod
(62) be provided on periphery wall with the first through flow hole (611) cooperation first annular slot (621), by first annular slot (621) with
The degree that first through flow hole (611) overlaps determines the output flow of main oil outlet (A).
6. a kind of flow divider valve for single-pump system according to claim 1, it is characterised in that：The overflow valve group
Part (5) includes valve pocket (51), poppet valve core (52), second spring (53) and overflow valve adjusting rod (54), the company of being provided on valve pocket (51)
Port valve set (51) inner cavity and the overflow valve port (511) of main control chamber (1a), valve pocket (51) inner cavity is connected with oil return opening (T), described
Poppet valve core (52), which is arranged on valve pocket (51) inner cavity and has second spring (53) to hold holding, blocks overflow valve port (511) trend, institute
Overflow valve adjusting rod (54) is stated to be threaded on valve pocket (51) and contradict with poppet valve core (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073706.9A CN108087366B (en) | 2018-01-25 | 2018-01-25 | A kind of flow divider valve for single-pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073706.9A CN108087366B (en) | 2018-01-25 | 2018-01-25 | A kind of flow divider valve for single-pump system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108087366A true CN108087366A (en) | 2018-05-29 |
| CN108087366B CN108087366B (en) | 2019-07-19 |
Family
ID=62182977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810073706.9A Active CN108087366B (en) | 2018-01-25 | 2018-01-25 | A kind of flow divider valve for single-pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108087366B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240417A (en) * | 2019-12-16 | 2021-01-19 | 新昌县善力机械科技有限公司 | Hydraulic control method for high-pressure oil pipe |
| CN117161159A (en) * | 2023-11-03 | 2023-12-05 | 南通尧成机械设备制造有限公司 | Hydraulic control loop device and method for lower die locking structure of bending machine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039288A (en) * | 1989-07-24 | 1990-01-31 | 权宇 | Composite control valve of pressure and flow proportional to electric current |
| CN201705749U (en) * | 2010-07-02 | 2011-01-12 | 上海立新液压有限公司 | Hydraulic control flow valve provided with overflow valve plug-in unit and pressure compensation plug-in unit |
| CN102313044A (en) * | 2010-07-02 | 2012-01-11 | 上海立新液压有限公司 | Hydraulic control flow valve |
| CN103089736A (en) * | 2013-01-31 | 2013-05-08 | 杨洁 | Balance valve and differential pressure protection controlling method of two-level protection overflow valve thereof |
| CN203005518U (en) * | 2012-12-21 | 2013-06-19 | 四川海搏液压机械有限公司 | Steering emergency valve |
| CN104047917A (en) * | 2014-06-23 | 2014-09-17 | 柳州柳工液压件有限公司 | Flow distributor for construction machine |
| CN104196801A (en) * | 2014-09-05 | 2014-12-10 | 酒泉奥凯种子机械股份有限公司 | Speed-regulating feedback control valve of hydraulic motor |
| CN205533507U (en) * | 2016-04-22 | 2016-08-31 | 青神格林维尔流体动力控制技术有限公司 | Take pressure compensation's hydraulic pressure proportional valve piece |
-
2018
- 2018-01-25 CN CN201810073706.9A patent/CN108087366B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039288A (en) * | 1989-07-24 | 1990-01-31 | 权宇 | Composite control valve of pressure and flow proportional to electric current |
| CN201705749U (en) * | 2010-07-02 | 2011-01-12 | 上海立新液压有限公司 | Hydraulic control flow valve provided with overflow valve plug-in unit and pressure compensation plug-in unit |
| CN102313044A (en) * | 2010-07-02 | 2012-01-11 | 上海立新液压有限公司 | Hydraulic control flow valve |
| CN203005518U (en) * | 2012-12-21 | 2013-06-19 | 四川海搏液压机械有限公司 | Steering emergency valve |
| CN103089736A (en) * | 2013-01-31 | 2013-05-08 | 杨洁 | Balance valve and differential pressure protection controlling method of two-level protection overflow valve thereof |
| CN104047917A (en) * | 2014-06-23 | 2014-09-17 | 柳州柳工液压件有限公司 | Flow distributor for construction machine |
| CN104196801A (en) * | 2014-09-05 | 2014-12-10 | 酒泉奥凯种子机械股份有限公司 | Speed-regulating feedback control valve of hydraulic motor |
| CN205533507U (en) * | 2016-04-22 | 2016-08-31 | 青神格林维尔流体动力控制技术有限公司 | Take pressure compensation's hydraulic pressure proportional valve piece |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240417A (en) * | 2019-12-16 | 2021-01-19 | 新昌县善力机械科技有限公司 | Hydraulic control method for high-pressure oil pipe |
| CN117161159A (en) * | 2023-11-03 | 2023-12-05 | 南通尧成机械设备制造有限公司 | Hydraulic control loop device and method for lower die locking structure of bending machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108087366B (en) | 2019-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102444636B (en) | Load sensitive pressure compensation multiway valve for excavator | |
| CN105840574A (en) | Load-sensitive multi-way valve and hydraulic system of engineering machine | |
| WO2012019498A1 (en) | Hydraulic control circuit and method | |
| CN108087366B (en) | A kind of flow divider valve for single-pump system | |
| CN106762916B (en) | Work connection, load sensing multi-way valve and engineering machinery | |
| CN101608692B (en) | Manual, electrical and hydraulic three-function Y-shaped constant-pressure flow regulating valve with multiple spray holes | |
| US20100307621A1 (en) | Hydraulic valve device | |
| CN105971964A (en) | Multiway electro-hydraulic control valve adopting oil return differential pressure as pilot oil source | |
| CN108266416B (en) | A kind of flow divider valve for double pump system | |
| CN104481948B (en) | Stabilized pressure flow control valve and load sensitive analog valve | |
| CN108087367B (en) | A kind of flow divider valve for load-sensitive pumping system | |
| CN106050779B (en) | forklift multi-way valve | |
| CN104595268A (en) | Pilot type integrated hydraulic governor control valve | |
| CN105422538B (en) | The multi-passage current sharing valve of pressure adaptive | |
| CN106382269A (en) | Combination valve with speed governing, reversing and overflow functions | |
| CN108240366B (en) | A kind of flow divider valve for the hydraulic accessory of excavator | |
| CN104343755A (en) | Hydraulically controlled slave valve and load-sensitive simulation valve | |
| CN104776077B (en) | Load-sensitive multiway valve with micromotion valve element | |
| CN102913438B (en) | Hydraulic pump changeover valve | |
| CN105840570B (en) | A kind of load sensing multi-way valve first and multi-way valve | |
| CN205779979U (en) | Adjustable flow distributing valve | |
| CN107420365B (en) | Load-sensitive control valve and load-sensitive control system | |
| CN203835850U (en) | Lifting balance pile-up valve for hydraulic molten metal trolley | |
| CN104930003B (en) | Intelligent integration valve block | |
| IT9019911A1 (en) | INDEPENDENT LOAD COMMAND DEVICE FOR HYDRAULIC USERS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190625 Address after: 430000 Business Network No. 96-103, No. 28-2 Building No. 3, Industrial Fourth Road, Qingshan District, Wuhan City, Hubei Province Applicant after: Wuhan Jiashide Mechanical and Electrical Equipment Co., Ltd. Address before: 315200 Room 501, Building 30 Yinfeng Xiaoyue, Jiaochuan Street, Zhenhai District, Ningbo City, Zhejiang Province Applicant before: Chen Yanyan |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |