CN104976174A - Threaded cartridge type pilot manual proportional throttled directional valve - Google Patents
Threaded cartridge type pilot manual proportional throttled directional valve Download PDFInfo
- Publication number
- CN104976174A CN104976174A CN201510372677.2A CN201510372677A CN104976174A CN 104976174 A CN104976174 A CN 104976174A CN 201510372677 A CN201510372677 A CN 201510372677A CN 104976174 A CN104976174 A CN 104976174A
- Authority
- CN
- China
- Prior art keywords
- hydraulic fluid
- fluid port
- valve
- spring seat
- drive link
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 82
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 208000002925 dental caries Diseases 0.000 claims description 2
- 238000011017 operating method Methods 0.000 claims description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a threaded cartridge type pilot manual proportional throttled directional valve. A guide bearing sleeve, a spring seat A, a spring seat B, a cylinder, a supporting sleeve and a valve sleeve are sequentially arranged in a valve body from top to bottom, and a clamp spring seat is arranged between the guide bearing sleeve and the spring seat A. An opening X and an opening Y are sequentially formed in the lower portion of the valve body from top to bottom and located on the outer ring of the cylinder, a convex block of a transmission rod divides an inner cavity of the cylinder into two cavities, and a through hole is formed in the upper cavity of the cylinder and communicated with the opening X. An oil opening A, two vertically-arranged oil openings P and an oil opening B are sequentially formed in the outer ring of the valve sleeve from top to bottom, an oil opening T is formed in the bottom of the valve sleeve, and a plurality of throttling holes of different apertures are formed in the outer side of the oil opening A and the outer side of the oil opening B in the spiral direction. The threaded cartridge type pilot manual proportional throttled directional valve is convenient and practical to use and reasonable in structure, manual operation can be achieved through control of a manual proportional pressure reducing valve, and remote control can be achieved through control of an electric proportional pressure reducing valve.
Description
Technical field
The invention belongs to hydraulic element field, particularly the manual ratio throttled directional valve of a kind of threaded insertion pilot, is widely used in the hydraulic control such as boats and ships, engineering machinery.
Background technique
At present both at home and abroad all without the product with the similar structure of the manual proportional reversing valve of screw thread inserting type, Conventional plate-type structure only has spool to adopt alloy steel products to make, valve body is by cast iron process, although cast iron has wear-resisting feature, but be not easy to heat treatment, its hardness cannot be brought up to the heat treated hardness of alloy steel products.
Summary of the invention
Object of the present invention will solve the problems of the technologies described above.
The object of the present invention is achieved like this: the manual ratio throttled directional valve of threaded insertion pilot, comprise valve body, valve pocket, main valve plug is provided with in valve pocket, it is characterized in that: the middle part of described valve body is provided with drive link, drive link bottom and main valve plug joggle, valve body top is connected with valve head assembly by nut, valve head assembly top front is provided with protecting jacket, the rear portion of protecting jacket is provided with locking device on the right side, valve head assembly front portion is provided with outwardly cylindrical body, band gearing shaft is provided with in cylindrical body, gear with gearing shaft engages with the tooth bar on drive link top, the handle of valve head assembly upper left-hand is arranged on the front end of band gearing shaft, and the locking spool of locking device is arranged on the transmission shaft of band gear transmission shaft rear end, and handle and locking device are on same vertical surface.
Be disposed with guided bearing cover, spring seat A, spring seat B, cylinder body, supporting sleeve, valve pocket in described valve body from top to bottom, be provided with clip spring seat between guided bearing cover and spring seat A, between spring seat A and spring seat B, be provided with Compress Spring; The bottom of valve body is disposed with X mouth, Y mouth from top to bottom, and X mouth, Y mouth are positioned at the outer ring of cylinder body, and the inner chamber of cylinder body is divided into a cavity by the projection of drive link, and the upper plenum of cylinder body is provided with a through hole, through hole communicates with X mouth.
The outer ring of described valve pocket is disposed with hydraulic fluid port A, two the hydraulic fluid port P be arranged above and below, hydraulic fluid port B from top to bottom, the bottom of valve pocket is provided with hydraulic fluid port T, the outside of hydraulic fluid port A, hydraulic fluid port B is provided with the throttle orifice of some different pore sizes that helically direction is arranged, two hydraulic fluid port P be arranged above and below all coordinate the cavity formed to communicate with valve pocket and main valve plug.
Comprise operating procedure as follows:
1), when home position, hydraulic fluid port P closes, and hydraulic fluid port A, hydraulic fluid port B are identical with hydraulic fluid port T throttling;
2), driving handle is stirred forward, handle drives band gear transmission axis rotation, with the tooth bar upwards moving linearly of the gear driven drive link on gearing shaft, drive link drives main valve plug upwards moving linearly, one section of dead band is had between hydraulic fluid port P to hydraulic fluid port A, after stroke exceedes dead band, hydraulic fluid port P starts to communicate with hydraulic fluid port A, main valve plug displacement and lever operated angle proportional, at this moment hydraulic fluid port P is to hydraulic fluid port A, hydraulic fluid port B is to hydraulic fluid port T, connected by the restriction formed between main valve plug and valve pocket, restriction characteristic is gradual, along with lever operated angle is larger, flow also correspondingly increases,
3), after release handle, promote spring seat A by Compress Spring, spring seat A drives drive link to carry out centering;
4), when handle is toward post-tensioning, now hydraulic fluid port P to hydraulic fluid port B, hydraulic fluid port A are to the proportional control of hydraulic fluid port T-shaped, its principle and step 2) identical.
The present invention is convenient and practical, rational in infrastructure, be not only applicable to operator's short-range operation, by manual proportional pressure-relief valve control, also can operate a long way off, by automatically controlled realize multiple valve combined operation also can be pilot operated, to realize the object of telecontrol; It is inner that selector valve main working parts is arranged on valve block, owing to there being the isolated of hydraulic oil, corrosion can not be produced, expose aerial part and adopt resistant material, thus the Environmental Conditions of the oceans such as boats and ships and offshore engineering equipment can be adapted to better, apply and there is good economic and social benefit.
Accompanying drawing explanation
Fig. 1 is plan view of the present invention.
Fig. 2 is plan view of the present invention.
Fig. 3 is left view of the present invention.
Fig. 4 is sectional view of the present invention.
Fig. 5 is I partial enlarged drawing of Fig. 4.
Fig. 6 is II partial enlarged drawing of Fig. 4.
Fig. 7 is throttle orifice unfolded drawing of the present invention.
Fig. 8 is schematic diagram of the present invention.
In figure: 1. handle; 2. protecting jacket; 3. locking device; 4. valve body; 5. hydraulic fluid port A; 6. hydraulic fluid port P; 7. hydraulic fluid port B; 8. be with gearing shaft; 9.X mouth; 10.Y mouth; 11. upper limits; 12. lower limit; 13. springs; 14. locking spools; 15. sealing seats; 16. transmission shafts; 17. valve head assemblies; 18. guided bearing covers; 19. clip spring seats; 20. spring seat A; 21. Compress Springs; 22. spring seat B; 23. cylinder bodies; 24. drive links; 25. supporting sleeves; 26. main valve plugs; 27. valve pockets; 28. hydraulic fluid port T; 29. throttle orifices.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described, but not as limitation of the present invention:
The manual ratio throttled directional valve of threaded insertion pilot, comprise valve body 4, valve pocket 27, main valve plug 26 is provided with in valve pocket 27, the middle part of described valve body 4 is provided with drive link 24, drive link 24 bottom and main valve plug 26 joggle, valve body 4 top is connected with valve head assembly 17 by nut, valve head assembly 17 top front is provided with protecting jacket 2, the rear portion of protecting jacket 2 is provided with locking device 3 on the right side, valve head assembly 17 front portion is provided with outwardly cylindrical body, band gearing shaft 8 is provided with in cylindrical body, gear with gearing shaft 8 engages with the tooth bar on drive link 24 top, the handle 1 of valve head assembly 17 upper left-hand is arranged on the front end of band gearing shaft 8, and the locking spool 14 of locking device 3 is arranged on the transmission shaft 16 of band gearing shaft 8 rear end, and handle 1 and locking device 3 are on same vertical surface, guided bearing cover 18, spring seat A20, spring seat B22, cylinder body 23, supporting sleeve 25, valve pocket 27 is disposed with from top to bottom in described valve body 4, be provided with clip spring seat 19 between guided bearing cover 18 and spring seat A20, between spring seat A20 and spring seat B22, be provided with Compress Spring 21, the outer ring that the bottom of valve body 4 is disposed with X mouth 9 from top to bottom, Y mouth 10, X mouth 9, Y mouth 10 are positioned at cylinder body 23, the inner chamber of cylinder body 23 is divided into 2 cavitys by the projection of drive link 24, and the upper plenum of cylinder body 23 is provided with a through hole, through hole communicates with X mouth 9, the outer ring of described valve pocket 27 is disposed with hydraulic fluid port A5, two the hydraulic fluid port P6 be arranged above and below, hydraulic fluid port B7 from top to bottom, the bottom of valve pocket 27 is provided with hydraulic fluid port T28, throttle orifice 29, two hydraulic fluid port P6 be arranged above and below that the outside of hydraulic fluid port A5, hydraulic fluid port B7 is provided with some different pore sizes that helically direction is arranged all coordinate the cavity formed to communicate with valve pocket 27 with main valve plug 26.
During concrete enforcement, 1), be disposed with upper limit 11, lower limit 12 from top to bottom in protecting jacket 2, lower limit 12 is connected with drive link 24, can control peak rate of flow; 2), locking device working principle: locking spool 14 bottom of locking device 3 is provided with sealing seat 15, the top of locking spool 14 is provided with nut, spring 13 is provided with between locking spool 14 and nut, the top of nut is provided with knob, be threaded connection between locking spool 14 and knob, fixed pin prevents from loosening; During locking, spring 13 withstands the step on locking spool 14, is sold by locking spool 14 inside transmission shaft 16, can prevent transmission shaft 16 from rotating, when pulling knob, overcoming spring force drives locking spool 14 and pin up to move to bottom nut L-type and to rotate after 90 degree, and pin is stuck in L-type groove bottom, and main valve plug 26 no longer moves down, now, locking spool 14 is thrown off with transmission shaft 16, and transmission shaft 16 can rotate, and can prevent misoperation; 3), the present invention adopts the form of thread cartridge, and be convenient to the design of hydraulic control valve group, processing, and can make volume is less by the valve group of identical function, quality is lighter, and beautiful shape is easy to operate; 4), spool valve pocket all can adopt alloy steel products to make, and be convenient to heat treatment, spool and valve pocket have quite high hardness, run into general oil residue, can shear, correspondingly improve contamination resistance.
Working principle: changed along with the position of main valve plug 26 movement by the hydraulic fluid flow rate of valve pocket 27, forms ratio throttling; Main valve plug 26 is hydraulic fluid port P6-hydraulic fluid port A5 when meta moves up, and hydraulic fluid port B7-hydraulic fluid port T28 communicates, and hydraulic fluid port P6-hydraulic fluid port B7 when main valve plug 26 moves down, hydraulic fluid port A5-hydraulic fluid port T28 communicates, and is now commutation function.
Driving handle 1 is stirred forward, handle 1 drives band gearing shaft 8 to rotate, with the tooth bar upwards moving linearly of the gear driven drive link 24 on gearing shaft, drive link 24 and main valve plug 26 take joggle form to be connected, drive link 24 is provided with Compress Spring 21, coordinating spring seat and jump ring to make bi-directional compression, can automatic centering be realized when stopping manually-operable, the subsidiary piston of drive link 24, piston can drive drive link 24 to move up and down according to the magnitude of pressure differential between pilot port X mouth 9, Y mouth 10 in cylinder body 23 inside, drive link 24 drives main valve plug 26 upwards moving linearly, plus lap form is adopted between main valve plug 26 and valve pocket 27, when home position, hydraulic fluid port P6 closes, hydraulic fluid port A5, hydraulic fluid port B7 is identical with hydraulic fluid port T28 throttling, when main valve plug 26 up moves, one section of dead band is had between hydraulic fluid port P6 to hydraulic fluid port A5, after stroke exceedes dead band, hydraulic fluid port P6 starts to communicate with hydraulic fluid port A5, main valve plug 26 displacement and handle 1 work angle proportional, at this moment hydraulic fluid port P6 is to hydraulic fluid port A5, hydraulic fluid port B7 is to hydraulic fluid port T28, connected by the restriction formed between main valve plug 26 and valve pocket 27, restriction characteristic is gradual, along with lever operated angle is larger, flow also correspondingly increases.
After release handle 1, promote spring seat A20 by Compress Spring 21, spring seat A20 drives drive link 24 to carry out centering.
When handle 1 is toward post-tensioning, now hydraulic fluid port P6 to hydraulic fluid port B7, hydraulic fluid port A5 form proportional control to hydraulic fluid port T28, and its principle is stirred forward identical with driving handle 1.
After the pressure reduction of pilot operated pilot port X mouth 9, Y mouth 10 is greater than lowest starting pressure, main valve plug 26 moves up and down, and its working principle is equal to manually-operable; Throttle orifice opening degree between main valve plug 26, valve pocket 27 changes according to the proportional change of pressure reduction of pilot port X mouth 9, Y mouth 10.
Major function of the present invention is moving direction and the movement velocity of hydraulic control executive component (oil hydraulic motor, hydraulic jack etc.); Coordinate pressure compensated control valve, the rigidity that can realize the movement velocity of hydraulic actuator regulates, and not by the impact of load change, strengthens the controllability of executive component.
The above embodiment of the present invention; it is only the citing clearly illustrating that the present invention does; but be not used for limiting the scope of the invention, all equivalent technological schemes also belong to category of the present invention, and scope of patent protection of the present invention should be limited by every claim.
Claims (2)
1. the manual ratio throttled directional valve of threaded insertion pilot, comprise valve body (4), valve pocket (27), main valve plug (26) is provided with in valve pocket (27), it is characterized in that: the middle part of described valve body (4) is provided with drive link (24), drive link (24) bottom and main valve plug (26) joggle, valve body (4) top is connected with valve head assembly (17) by nut, valve head assembly (17) top front is provided with protecting jacket (2), the rear portion of protecting jacket (2) is provided with locking device (3) on the right side, valve head assembly (17) front portion is provided with outwardly cylindrical body, band gearing shaft (8) is provided with in cylindrical body, the gear of band gearing shaft (8) engages with the tooth bar on drive link (24) top, the handle (1) of valve head assembly (17) upper left-hand is arranged on the front end of band gearing shaft (8), the locking spool (14) of locking device (3) is arranged on the transmission shaft (16) of band gearing shaft (8) rear end, and handle (1) and locking device (3) are on same vertical surface, be disposed with guided bearing cover (18), spring seat A(20 from top to bottom in described valve body (4)), spring seat B(22), cylinder body (23), supporting sleeve (25), valve pocket (27), guided bearing cover (18) and spring seat A(20) between be provided with clip spring seat (19), spring seat A(20) and spring seat B(22) between be provided with Compress Spring (21), the bottom of valve body (4) is disposed with X mouth (9), Y mouth (10) from top to bottom, X mouth (9), Y mouth (10) are positioned at the outer ring of cylinder body (23), the inner chamber of cylinder body (23) is divided into 2 cavitys by the projection of drive link (24), the upper plenum of cylinder body (23) is provided with a through hole, through hole communicates with X mouth (9), the outer ring of described valve pocket (27) is disposed with hydraulic fluid port A(5 from top to bottom), two hydraulic fluid port P(6 be arranged above and below), hydraulic fluid port B(7), the bottom of valve pocket (27) is provided with hydraulic fluid port T(28), hydraulic fluid port A(5), hydraulic fluid port B(7) outside be provided with the throttle orifice (29) of some different pore sizes that helically direction is arranged, two hydraulic fluid port P(6 be arranged above and below) all coordinate the cavity formed to communicate with valve pocket (27) with main valve plug (26).
2. the manual ratio throttled directional valve of threaded insertion pilot according to claim 1, is characterized in that: comprise operating procedure as follows:
1), when home position, hydraulic fluid port P(6) close, hydraulic fluid port A(5), hydraulic fluid port B(7) with hydraulic fluid port T(28) throttling is identical;
2), driving handle (1) is stirred forward, handle (1) drives band gearing shaft (8) to rotate, the tooth bar upwards moving linearly of the gear driven drive link (24) on band gearing shaft (8), drive link (24) drives main valve plug (26) upwards moving linearly, hydraulic fluid port P(6) to hydraulic fluid port A(5) between have one section of dead band, after stroke exceedes dead band, hydraulic fluid port P(6) with hydraulic fluid port A(5) start to communicate, main valve plug (26) displacement and handle (1) work angle proportional, at this moment hydraulic fluid port P(6) to hydraulic fluid port A(5), hydraulic fluid port B(7) to hydraulic fluid port T(28), connected by the restriction formed between main valve plug (26) and valve pocket (27), restriction characteristic is gradual, along with lever operated angle is larger, flow also correspondingly increases,
3), after release handle (1), spring seat A(20 is promoted by Compress Spring (21)), spring seat A(20) drive drive link (24) to carry out centering;
4), when handle (1) toward post-tensioning time, now hydraulic fluid port P(6) to hydraulic fluid port B(7), hydraulic fluid port A(5) to hydraulic fluid port T(28) form proportional control, its principle and step 2) identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510372677.2A CN104976174B (en) | 2015-07-01 | 2015-07-01 | Threaded cartridge type pilot manual proportional throttled directional valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510372677.2A CN104976174B (en) | 2015-07-01 | 2015-07-01 | Threaded cartridge type pilot manual proportional throttled directional valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104976174A true CN104976174A (en) | 2015-10-14 |
| CN104976174B CN104976174B (en) | 2017-01-25 |
Family
ID=54273003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510372677.2A Active CN104976174B (en) | 2015-07-01 | 2015-07-01 | Threaded cartridge type pilot manual proportional throttled directional valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104976174B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288947A (en) * | 2017-08-07 | 2017-10-24 | 上海立新液压有限公司 | A kind of manual proportional reversing valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2874720A (en) * | 1957-02-14 | 1959-02-24 | Parker Hannifin Corp | Valve assembly |
| DE2119169A1 (en) * | 1971-04-20 | 1972-11-16 | ||
| DE3507866A1 (en) * | 1985-03-06 | 1986-09-11 | Deere & Co., Moline, Ill. | VALVE |
| JPH09100921A (en) * | 1995-07-31 | 1997-04-15 | Schmidt & Lenhardt Gmbh & Co Ohg | Manual control unit of lift for bathtub |
| CN101846111A (en) * | 2010-06-10 | 2010-09-29 | 江苏鼎晟液压有限公司 | Pilot proportional multi-path reversing valve |
| CN204755450U (en) * | 2015-07-01 | 2015-11-11 | 靖江市菲尔特液压机械有限公司 | Manual proportion throttled directional valve of screw -in cartridge formula guide |
-
2015
- 2015-07-01 CN CN201510372677.2A patent/CN104976174B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2874720A (en) * | 1957-02-14 | 1959-02-24 | Parker Hannifin Corp | Valve assembly |
| DE2119169A1 (en) * | 1971-04-20 | 1972-11-16 | ||
| DE3507866A1 (en) * | 1985-03-06 | 1986-09-11 | Deere & Co., Moline, Ill. | VALVE |
| JPH09100921A (en) * | 1995-07-31 | 1997-04-15 | Schmidt & Lenhardt Gmbh & Co Ohg | Manual control unit of lift for bathtub |
| CN101846111A (en) * | 2010-06-10 | 2010-09-29 | 江苏鼎晟液压有限公司 | Pilot proportional multi-path reversing valve |
| CN204755450U (en) * | 2015-07-01 | 2015-11-11 | 靖江市菲尔特液压机械有限公司 | Manual proportion throttled directional valve of screw -in cartridge formula guide |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288947A (en) * | 2017-08-07 | 2017-10-24 | 上海立新液压有限公司 | A kind of manual proportional reversing valve |
| CN107288947B (en) * | 2017-08-07 | 2023-11-03 | 上海立新液压有限公司 | Manual proportional reversing valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104976174B (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2869408Y (en) | Load feedback combination valve | |
| US20180299025A1 (en) | Valve, in particular a 4/2-way slide valve | |
| DE102009025827A1 (en) | Hydraulic switching device for the mobile hydraulics, mobile hydraulic machine and valve unit | |
| CN103921899B (en) | Gear checking bollard and gear cable device | |
| US20150198241A1 (en) | Spool Valve | |
| WO2013017142A1 (en) | Valve | |
| AT516316A2 (en) | Hydraulic circuit and machine with a hydraulic circuit | |
| CN204755450U (en) | Manual proportion throttled directional valve of screw -in cartridge formula guide | |
| CN104976174A (en) | Threaded cartridge type pilot manual proportional throttled directional valve | |
| CN1133024C (en) | Fluid biased transmission range valve | |
| WO2019216195A1 (en) | Valve device | |
| CN102878141A (en) | Combined type rotary motor reversion-preventing buffering balanced valve | |
| CN204755449U (en) | Screw -in cartridge formula guide proportion switching -over valve | |
| CN205715031U (en) | A kind of multiple directional control valve of band mechanical release device | |
| CN104315109A (en) | Hydraulic transmission gearbox | |
| DE102009035216A1 (en) | Slewing drive | |
| CN201344161Y (en) | Mechanical-feedback plug-in proportional throttle valve | |
| DE19935890A1 (en) | Hit kinematic device for e.g. valve plug, valve tappet | |
| DE102015015807A1 (en) | Hydraulic hammer with variable stroke control | |
| DE2441293A1 (en) | GEAR AND CONTROL SYSTEM FOR A LIFTING DEVICE | |
| DE102014215517A1 (en) | fluid arrangement | |
| CN201258889Y (en) | Plunger type derrick expansion oil cylinder | |
| CN1124418C (en) | Hydraulic servo device | |
| CN104653537A (en) | Lockable reversing valve | |
| EP3384164A1 (en) | Monitoring device for tool turret |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 214500, 300 meters east of Mataoqiao, Jiangping Road, Jingjiang City, Taizhou City, Jiangsu Province Patentee after: Jiangsu feiter Hydraulic Machinery Co.,Ltd. Address before: 214500, 300 meters east of Maqiao Bridge, Jiangping Road, Jingjiang City, Taizhou City, Jiangsu Province Patentee before: JINGJIANG FLUID HYDRAULICS MACHINE Co.,Ltd. |
|
| CP03 | Change of name, title or address |