CN108223479B - Large-flow manual reversing valve with overload protection - Google Patents
Large-flow manual reversing valve with overload protection Download PDFInfo
- Publication number
- CN108223479B CN108223479B CN201810096210.3A CN201810096210A CN108223479B CN 108223479 B CN108223479 B CN 108223479B CN 201810096210 A CN201810096210 A CN 201810096210A CN 108223479 B CN108223479 B CN 108223479B
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- Prior art keywords
- transition
- valve
- oil
- valve body
- overflow
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- 230000007704 transition Effects 0.000 claims abstract description 151
- 238000000034 method Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 122
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
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- 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
- F15B13/024—Pressure relief valves
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- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a high-flow manual reversing valve with overload protection, which comprises a main valve body, a main valve spool, a working port A, a working port B, a main valve oil inlet, a main valve oil return port and a handle, wherein a transition oil inlet and a transition oil return port are arranged on the main valve body, a transition valve is fixed above the main valve body, a first oil pressure cavity, a transition oil return cavity, a transition oil inlet cavity and a second oil pressure cavity are arranged in the transition valve body through the transition valve spool, an oil return ring groove is arranged on the transition valve spool, a transition spring seat is arranged on a transition valve cover, a transition spring is arranged between the transition spring seat and the transition valve spool, an overflow valve is fixed on the rear side of the transition valve, a shuttle valve is arranged in the overflow valve, two shuttle valve oil inlets of the shuttle valve are respectively communicated with the working port A and the working port B, the shuttle valve oil return port of the shuttle valve is communicated with the second oil pressure cavity and the oil inlet of the overflow valve, and the oil return port of the overflow valve is communicated with the transition oil return cavity. The invention occupies small installation space and has high pressure release rate to high-pressure oil.
Description
Technical Field
The invention relates to a high-flow manual reversing valve with overload protection, and belongs to the technical field of manual reversing valve design.
Background
High-flow manual reversing valves are often used in hydraulic control systems to manually control the flow direction of hydraulic oil. The high-flow manual reversing valve in the prior art has single structure and function and can only complete reversing work of oil. However, in the actual working process of the high-flow manual reversing valve, the working port A and the working port B of the high-flow manual reversing valve can generate high pressure exceeding normal working pressure due to damage, abnormal resistance and the like of a hydraulic system or an executive component, so that the executive component or the high-displacement manual reversing valve is damaged, an overflow device is usually required to be added in a hydraulic circuit for limiting the high pressure, a large amount of installation space is wasted, the pressure release speed is low, and the hydraulic oil is not unloaded timely due to large hydraulic oil displacement, so that the executive component or the high-displacement manual reversing valve is still damaged.
Disclosure of Invention
According to the defects in the prior art, the technical problems to be solved by the invention are as follows: the high-flow manual reversing valve with overload protection is small in occupied installation space and high in pressure release rate.
The invention discloses a high-flow manual reversing valve with overload protection, which comprises a main valve body, a main valve spool, a working A port, a working B port, a main valve oil inlet, a main valve oil return port and a handle, wherein the upper side wall of the main valve body is provided with a transition oil inlet communicated with the main valve oil inlet and a transition oil return port communicated with the main valve oil return port, a transition valve is fixedly arranged above the main valve body and comprises a transition valve body and a transition valve cover matched with the transition valve body, a transition valve spool is connected in the transition valve body in a sliding manner, a space formed by the transition valve spool and the transition valve body is sequentially divided into a first oil pressure cavity, a transition oil return cavity, a transition oil inlet cavity and a second oil pressure cavity from left to right, the first oil pressure cavity is communicated with the transition oil inlet cavity through a process hole, the transition oil inlet is connected with the transition oil inlet, the transition oil return cavity is connected with the transition oil return port, a transition oil return ring groove corresponding to the transition oil return cavity and the transition oil inlet cavity is arranged on the transition valve spool, a transition spring is arranged between the transition spring seat and the transition valve spool, an overflow valve is fixedly arranged on the rear side of the transition valve body, a shuttle valve is arranged in the overflow valve body, two shuttle valves are communicated with the overflow valve oil return cavity through the working B port and the first oil return cavity through the first oil return cavity and the working B port through the process hole.
The main valve body is provided with two first inclined pipes which are respectively connected with the working A port and the working B port, the transition valve body is provided with two second inclined pipes which are respectively connected with the oil inlets of the two shuttle valves, and the two first inclined pipes are respectively connected with the two second inclined pipes.
The inside of foretell transition valve case is equipped with an inner chamber that communicates with the second oil pressure chamber, is equipped with the damping hole of connecting inner chamber and return oil annular on the transition valve case, still is equipped with ball plug and interior spring holder rather than the matching in the inner chamber, is equipped with interior spring between interior spring holder and the ball plug, the one end of transition spring fix on the interior spring holder in the transition valve case, can prevent effectively that the transition valve case from oscillating at the during operation, make the removal of transition valve case more steady.
The front end and the rear end of the main valve body are respectively provided with the valve body front cover and the valve body rear cover, the front end of the main valve core is provided with a positioning hole penetrating the radial direction of the main valve core, the positioning hole is internally provided with a positioning spring, both ends of the positioning spring are respectively provided with positioning balls, the valve body front cover is provided with bayonets corresponding to the two positioning balls, the rear end of the main valve core is provided with a limiting pin penetrating the radial direction of the main valve core, and the valve body rear cover is fixedly provided with a stop block corresponding to the limiting pin; and the middle position is positioned through the cooperation of the two positioning balls and the bayonet, so that the positioning is accurate, and the position sense is strong.
The bayonet is a through hole, and the manufacturing process is simple.
The overflow valve comprises an overflow valve body, an overflow valve cover, an overflow valve seat, an overflow valve core, an overflow spring and an overflow spring seat, wherein the overflow spring seat is in sliding connection with the overflow valve body, and a pressure regulating screw corresponding to the overflow spring seat is in threaded connection with the overflow valve cover, so that the high-pressure value to be unloaded can be conveniently regulated.
Working principle and process:
when the hydraulic oil pump is in normal operation, the pressure in the first oil pressure cavity and the second oil pressure cavity are consistent when abnormal resistance or part damage occurs and high pressure is formed at the working A port, then the high-pressure oil in the working A port sequentially passes through the first inclined tube, the second inclined tube, the shuttle valve oil inlet and the shuttle valve oil return port and the high-pressure oil in the second oil pressure cavity to be mixed, the overflow valve is opened together through the oil inlet of the overflow valve, then the oil returns to the transition oil return cavity through the oil return port of the overflow valve, and then the pressure is relieved through the transition oil return port and the main valve oil return port, so that the pressure in the second oil pressure cavity is reduced, however, the pressure in the first oil pressure cavity which is consistent with the pressure in the second oil pressure cavity is kept unchanged, the high-pressure oil cavity in the first oil pressure cavity can push the transition valve to move to the transition oil cavity, the transition oil return cavity is enabled to overcome the transition oil return force of the transition oil cavity, and the transition oil return cavity is completely filled in the transition oil cavity, the transition oil cavity is completely filled in the transition oil cavity, and the transition oil cavity is completely filled in the transition oil cavity through the transition groove, and the transition oil return cavity is completely filled in the transition groove; when the handle is in the P-B reversing position, the principle is consistent with that when the handle is in the P-A reversing position.
Compared with the prior art, the invention has the following beneficial effects:
the high-flow manual reversing valve with overload protection is provided with the overflow valve and the transition valve, and other overflow devices are not required to be additionally arranged, so that the installation space is greatly saved, the pressure release rate of high-pressure oil is higher, and the damage of an executive component caused by untimely pressure release is prevented; and the pressure signal for opening the overflow valve is directly transmitted from the working A port or the working B port, so that the opening sensitivity and the opening pressure accuracy of the overflow valve during overload are ensured.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a rear view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a cross-sectional view at C-C in FIG. 3;
FIG. 5 is a cross-sectional view at B-B in FIG. 1;
FIG. 6 is a cross-sectional view at A-A in FIG. 1;
FIG. 7 is a schematic view of the internal structure of the shuttle valve of the present invention;
FIG. 8 is a schematic view of the internal structure of the transition valve spool of the present invention;
FIG. 9 is a cross-sectional view of the present invention at the stop pin;
FIG. 10 is a cross-sectional view of the invention at a locating hole;
fig. 11 is a schematic diagram of the hydraulic operation of the present invention.
In the figure: 1. a main valve body; 2. a work B port; 3. a work A port; 4. a transition valve; 5. a handle; 6. an overflow valve; 7. a main valve oil inlet; 8. an oil return port of the main valve; 9. an overflow valve seat; 10. an overflow valve core; 11. a shuttle valve; 12. an overflow valve body; 13. an overflow spring; 14. an overflow spring seat; 15. an overflow valve cover; 16. a pressure regulating screw; 17. a valve body rear cover; 18. a limiting pin; 19. a main valve core; 20. a transition oil return port; 21. a transition oil inlet; 23. a transition oil return cavity; 24. a transition valve spool; 25. a first oil pressure chamber; 26. a damping hole; 27. oil return ring grooves; 28. a transition valve body; 29. a transition oil inlet cavity; 30. a transition spring; 31. a second oil pressure chamber; 32. a transition spring seat; 33. a transition valve cover; 34. a bayonet; 35. a positioning spring; 36. a positioning ball; 37. a valve body front cover; 38. a stop block; 39. a first inclined tube; 40. a second inclined tube; 41. a shuttle valve oil inlet; 42. a shuttle valve oil return port; 43. an inner cavity; 44. ball blocking; 45. an inner spring; 46. an inner spring seat.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
as shown in fig. 1 to 11, the high-flow manual reversing valve with overload protection comprises a main valve body 1, a main valve spool 19, a working port A3, a working port B2, a main valve oil inlet 7, a main valve oil return port 8 and a handle 5, wherein a transition oil inlet 21 communicated with the main valve oil inlet 7 and a transition oil return port 20 communicated with the main valve oil return port 8 are arranged on the upper side wall of the main valve body 1, a transition valve 4 is fixed above the main valve body 1, the transition valve 4 comprises a transition valve body 28 and a transition valve cover 33 matched with the transition valve body 28, a transition valve spool 24 is slidably connected in the transition valve body 28, a space formed by the transition valve spool 24 and the transition valve body 28 is sequentially divided into a first oil pressure cavity 25, a transition oil return cavity 23, a transition oil inlet 29 and a second oil pressure cavity 31 from left to right, the first oil pressure cavity 25 is communicated with the transition oil inlet 29 through a process hole, the transition oil inlet 29 is connected with the transition oil return port 20, a transition valve spool 24 is provided with a transition oil return hole 23 corresponding to the transition oil return cavity 23, a transition valve seat 27 is arranged on the transition valve spool 24, a transition valve seat 32 is arranged on the transition valve spool seat 2, an overflow valve seat 32 is arranged on the transition valve seat 2, an overflow valve seat 32 is arranged in the transition valve seat 2 is provided with the space formed by the transition valve spool 2, and the oil return hole is provided with the overflow valve seat 32, and the space is provided with a plurality of the overflow valve seat 32, and is provided with a valve seat 2, and has a valve through valve hole through the valve hole 11.
In a preferred embodiment: the main valve body 1 is provided with two first inclined pipes 39 which are respectively connected with the working A port 3 and the working B port 2, the transition valve body 28 is provided with two second inclined pipes 40 which are respectively connected with the oil inlets 41 of the two shuttle valves, and the two first inclined pipes 39 are respectively connected with the two second inclined pipes 40; an inner cavity 43 communicated with the second oil pressure cavity 31 is arranged in the transition valve core 24, a damping hole 26 for connecting the inner cavity 43 with the oil return ring groove 27 is arranged on the transition valve core 24, a ball plug 44 and an inner spring seat 46 matched with the inner cavity 43 are also arranged in the inner cavity 43, an inner spring 45 is arranged between the inner spring seat 46 and the ball plug 44, one end of the transition spring 30 is fixed on the inner spring seat 46 in the transition valve core 24, and vibration of the transition valve core 24 during working can be effectively prevented, so that the transition valve core 24 moves more stably; the front end and the rear end of the main valve body 1 are respectively provided with a valve body front cover 37 and a valve body rear cover 17, the front end of the main valve spool 19 is provided with a positioning hole penetrating the radial direction of the main valve spool, a positioning spring 35 is arranged in the positioning hole, both ends of the positioning spring 35 are respectively provided with positioning balls 36, the valve body front cover 37 is provided with bayonets 34 corresponding to the two positioning balls 36, the rear end of the main valve spool 19 is provided with a limiting pin 18 penetrating the radial direction of the main valve spool, the valve body rear cover 17 is fixedly provided with a stop block 38 corresponding to the limiting pin 18, and the built-in limiting mode of the handle 5 is adopted, so that the structure is simple and durable, and the service life of the valve is effectively prolonged; in addition, the middle position is positioned by the cooperation of the two positioning balls 36 and the bayonet 34, so that the positioning is accurate, and the position sense is strong; the bayonet 34 is a through hole, and the manufacturing process is simple; the overflow valve 6 comprises an overflow valve body 12, an overflow valve cover 15, an overflow valve seat 9, an overflow valve core 10, an overflow spring 13 and an overflow spring seat 14, wherein the overflow spring seat 14 is in sliding connection with the overflow valve body 12, and a pressure regulating screw 16 corresponding to the overflow spring seat 14 is in threaded connection with the overflow valve cover 15, so that the high pressure value to be unloaded can be conveniently regulated.
When in use, the working A port 3 and the working B port 2 are respectively communicated with the C1 port and the C2 port of an executive component (a motor or an oil cylinder), when the handle 5 is at the P-A reversing position, in normal operation, the main valve oil inlet 7 is communicated with the working A port 3, so that the pressure in the first oil pressure cavity 25 and the second oil pressure cavity 31 is consistent, when the working A port 3 forms high pressure due to abnormal resistance or part damage, the high pressure is formed in the first oil pressure cavity 25 and the second oil pressure cavity 31, then high pressure oil at the working A port 3 is sequentially mixed with the high pressure oil in the second oil pressure cavity 31 through the first inclined pipe 39, the second inclined pipe 40, the shuttle valve oil inlet 41 and the shuttle valve oil return port 42, the overflow valve 6 is opened together through the oil inlet of the overflow valve 6, then, the high-pressure oil flows to the transition oil return cavity 23 through the oil return port of the overflow valve 6, and then is subjected to pressure relief through the transition oil return port 20 and the main valve oil return port 8, so that the pressure in the second oil pressure cavity 31 is reduced, however, the pressure in the first oil pressure cavity 25 which is consistent with the pressure in the second oil pressure cavity 31 is originally kept unchanged, so that the high-pressure oil in the first oil pressure cavity 25 can push the transition valve core 24 to move against the holding force of the transition spring 30, the transition oil return cavity 23 and the transition oil inlet cavity 29 are communicated through the oil return ring groove 27, and the high-pressure oil returns through the main valve oil inlet 7, the transition oil inlet 21, the transition oil inlet cavity 29, the oil return ring groove 27, the transition oil return cavity 23, the transition oil return port 20 and the main valve oil return port 8, and the unloading of the high-pressure oil is completed; when the handle 5 is in the P-B reversing position, the principle is identical to when the handle 5 is in the P-a reversing position.
The high-flow manual reversing valve with overload protection is provided with the overflow valve 6 and the transition valve 4, and other overflow devices are not required to be additionally arranged, so that the installation space is greatly saved, the pressure release rate of high-pressure oil is higher, and the damage of an executive component caused by untimely pressure release is prevented; and the pressure signal for opening the overflow valve 6 is directly transmitted from the working A port 3 or the working B port 2, so that the opening sensitivity and the opening pressure accuracy of the overflow valve 6 during overload are ensured.
Claims (6)
1. The utility model provides a from manual switching-over valve of large-traffic of taking overload protection, includes main valve body (1), main valve case (19), work A mouth (3), work B mouth (2), main valve oil inlet (7), main valve oil return opening (8) and handle (5), its characterized in that: the upper side wall of the main valve body (1) is provided with a transition oil inlet (21) communicated with the main valve oil inlet (7) and a transition oil return port (20) communicated with the main valve oil return port (8), a transition valve (4) is fixed above the main valve body (1), the transition valve (4) comprises a transition valve body (28) and a transition valve cover (33) matched with the transition valve body (28), the transition valve body (28) is internally and slidably connected with a transition valve core (24), the space formed by the transition valve core (24) and the transition valve body (28) is sequentially divided into a first oil pressure cavity (25), a transition oil return cavity (23), a transition oil inlet cavity (29) and a second oil pressure cavity (31) from left to right, the first oil pressure cavity (25) is communicated with the transition oil inlet cavity (29) through a process hole, the transition oil inlet cavity (29) is connected with the transition oil inlet (21), the transition oil return cavity (23) is connected with the transition oil return port (20), an oil return (27) corresponding to the transition oil return cavity (23) and the transition oil cavity (29) is arranged on the transition valve body (24), a transition valve cover (32) is arranged on the transition valve cover (33), a transition spring seat (32) is arranged between the transition valve core (24) and the transition valve body (4) and an overflow valve seat (6), be equipped with shuttle valve (11) in overflow valve (6), two shuttle valve oil inlets (41) of shuttle valve (11) communicate work A mouth (3) and work B mouth (2) through a plurality of process holes respectively, and shuttle valve oil return opening (42) of shuttle valve (11) communicate the oil inlet of second oil pressure chamber (31) and overflow valve (6) through the process hole, and the oil return opening of overflow valve (6) communicates transition oil return chamber (23) through the process hole.
2. The self-overload-protection high-flow manual diverter valve according to claim 1 wherein: the main valve body (1) is provided with two first inclined pipes (39) which are respectively connected with the working A port (3) and the working B port (2), the transition valve body (28) is provided with two second inclined pipes (40) which are respectively connected with oil inlets (41) of two shuttle valves, and the two first inclined pipes (39) are respectively connected with the two second inclined pipes (40).
3. The self-contained overload-protected high-flow manual diverter valve according to claim 1 or 2 wherein: the inside of transition valve case (24) be equipped with one with the inner chamber (43) of second oil pressure chamber (31) intercommunication, be equipped with on the transition valve case (24) connect damping hole (26) of inner chamber (43) and oil return annular (27), still be equipped with ball plug (44) and interior spring holder (46) rather than the matching in inner chamber (43), be equipped with interior spring (45) between interior spring holder (46) and ball plug (44), one end of transition spring (30) fix on interior spring holder (46) in transition valve case (24).
4. The self-contained overload-protected high-flow manual diverter valve according to claim 1 or 2 wherein: the front end and the rear end of the main valve body (1) are respectively provided with a valve body front cover (37) and a valve body rear cover (17), the front end of the main valve core (19) is provided with a radial positioning hole penetrating through the main valve body front cover and the valve body rear cover, positioning springs (35) are arranged in the positioning holes, positioning balls (36) are arranged at the two ends of each positioning spring (35), bayonets (34) corresponding to the two positioning balls (36) are arranged on the valve body front cover (37), the rear end of the main valve core (19) is provided with a radial limiting pin (18) penetrating through the main valve core, and a stop block (38) corresponding to the limiting pin (18) is fixed on the valve body rear cover (17).
5. The self-overload-protection high-flow manual diverter valve according to claim 4 wherein: the bayonet (34) is a through hole.
6. The self-contained overload-protected high-flow manual diverter valve according to claim 1 or 2 wherein: the overflow valve (6) comprises an overflow valve body (12), an overflow valve cover (15), an overflow valve seat (9), an overflow valve core (10), an overflow spring (13) and an overflow spring seat (14), wherein the overflow spring seat (14) is in sliding connection with the overflow valve body (12), and a pressure regulating screw rod (16) corresponding to the overflow spring seat (14) is connected to the overflow valve cover (15) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810096210.3A CN108223479B (en) | 2018-01-31 | 2018-01-31 | Large-flow manual reversing valve with overload protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810096210.3A CN108223479B (en) | 2018-01-31 | 2018-01-31 | Large-flow manual reversing valve with overload protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108223479A CN108223479A (en) | 2018-06-29 |
| CN108223479B true CN108223479B (en) | 2024-03-29 |
Family
ID=62670205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810096210.3A Active CN108223479B (en) | 2018-01-31 | 2018-01-31 | Large-flow manual reversing valve with overload protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108223479B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682382A (en) * | 2020-12-31 | 2021-04-20 | 上海立新液压有限公司 | Auxiliary valve group |
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| CN2890448Y (en) * | 2005-12-08 | 2007-04-18 | 常德信诚液压有限公司 | Hydraulic combined control valve |
| WO2008025403A1 (en) * | 2006-08-31 | 2008-03-06 | Wabco Gmbh | Pneumatic module |
| CN101403398A (en) * | 2008-11-14 | 2009-04-08 | 天津玖丰重工机械有限公司 | Hydraulic multichannel conversion valve |
| CN101598152A (en) * | 2009-06-18 | 2009-12-09 | 卢宇 | Large-flow compact type bi-directional rotary control valve |
| CN102444636A (en) * | 2010-09-30 | 2012-05-09 | 李金海 | Load sensitive pressure compensation multiway valve for excavator |
| CN101922480A (en) * | 2010-09-30 | 2010-12-22 | 无锡英特帕普威孚液压有限责任公司 | Hydraulic reversing valve with overloading protecting function during pressure maintaining |
| CN103511375A (en) * | 2012-06-15 | 2014-01-15 | 泊姆克(天津)液压有限公司 | Two-way plug-in mounting type vibration control valve |
| CN102996555A (en) * | 2012-11-28 | 2013-03-27 | 武汉船用机械有限责任公司 | Automatic take-up valve bank and hydraulic system |
| CN203189372U (en) * | 2013-04-01 | 2013-09-11 | 重庆航宇实业有限公司 | Pneumatic control reversing valve |
| CN203176435U (en) * | 2013-04-09 | 2013-09-04 | 大连兴龙液压有限公司 | Electromagnetic throttling valve |
| CN103206419A (en) * | 2013-04-18 | 2013-07-17 | 三一汽车起重机械有限公司 | Rotary hydraulic system and construction machinery |
| CN103671325A (en) * | 2013-12-11 | 2014-03-26 | 常德中联重科液压有限公司 | Reversing valve, hydraulic actuator reversing control loop and engineering machine |
| CN204041582U (en) * | 2014-09-03 | 2014-12-24 | 陕西汽车集团有限责任公司 | The antioverloading hydraulic system that wing opening type box van and flank thereof open and close |
| CN205858853U (en) * | 2016-08-08 | 2017-01-04 | 大连兴龙液压有限公司 | A kind of electromagnetic relief valve |
| CN205956446U (en) * | 2016-08-23 | 2017-02-15 | 山东迅凯消防设备有限公司 | Switching -over valve system of axial structure |
| CN207814075U (en) * | 2018-01-31 | 2018-09-04 | 邹城市益凯德液压有限公司 | The high flow manual reversal valve of included overload protection |
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| CN108223479A (en) | 2018-06-29 |
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