CN110939618A - Pressure maintaining type single-action hydraulic manual mechanism - Google Patents
Pressure maintaining type single-action hydraulic manual mechanism Download PDFInfo
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- CN110939618A CN110939618A CN201911369455.XA CN201911369455A CN110939618A CN 110939618 A CN110939618 A CN 110939618A CN 201911369455 A CN201911369455 A CN 201911369455A CN 110939618 A CN110939618 A CN 110939618A
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- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000010521 absorption reaction Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 description 132
- 238000000034 method Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention relates to a pressure maintaining type single-action hydraulic manual mechanism, which comprises a hydraulic cylinder, an oil tank and a manual hydraulic pump which are integrally formed, wherein one end of the oil tank is communicated with the inner part of an oil cavity on a cylinder barrel of the hydraulic cylinder through a through hole of the hydraulic cylinder, the other end of the oil tank is communicated with an inner hole of the manual hydraulic pump, the inner hole of the manual hydraulic pump is communicated with a plunger oil cavity through a communication hole, a rotary valve core and a soft sealing structure which are mutually abutted are arranged in the manual hydraulic pump, and the inner part of the manual hydraulic; the inner side of the rotary valve core is also respectively provided with a pressure oil one-way valve and an oil absorption one-way valve, and the pressure maintaining and oil drainage station of the hydraulic manual mechanism is realized by changing the position of the rotary valve core relative to the soft sealing structure and opening and closing the pressure oil one-way valve or the oil absorption one-way valve; according to the manual hydraulic pump, the oil pressing one-way valve and the oil absorption one-way valve are arranged in the opening of the rotary valve core, and the handle of the rotary valve core can be rotated through the soft sealing structure, so that the manual hydraulic pump can realize oil pressing, pressure maintaining and pressure releasing stations.
Description
Technical Field
The invention relates to the field of hydraulic assemblies, in particular to a pressure maintaining type single-action hydraulic manual mechanism with a self-resetting actuating mechanism.
Background
The hydraulic manual mechanism is gradually applied to valve products in various industries due to light operation, and the expansion of the application range of the hydraulic manual mechanism is influenced because the hydraulic manual mechanism has the problems of the arrangement of an oil tank and the connection of pipelines and the hard sealing one-way valve of the manual hydraulic pump is difficult to reach zero leakage.
Disclosure of Invention
The applicant carries out research and improvement aiming at the existing problems and provides a pressure-maintaining type single-action hydraulic manual mechanism which has the characteristics of compact structure, small oil tank volume and excellent pressure-maintaining effect.
The technical scheme adopted by the invention is as follows:
the pressure maintaining type single-action hydraulic manual mechanism comprises a hydraulic cylinder, an oil tank and a manual hydraulic pump which are integrally formed, wherein one end of the oil tank is communicated with the inner part of an oil cavity on a cylinder barrel of the hydraulic cylinder through a through hole of the hydraulic cylinder, the other end of the oil tank is communicated with an inner hole of the manual hydraulic pump through an oil path, the inner hole of the manual hydraulic pump is communicated with a plunger oil cavity provided with a plunger of the manual pump through a communication hole, a rotary valve core and a soft sealing structure which are mutually abutted are arranged in the manual hydraulic pump, and the inner part of the manual hydraulic pump is also communicated with an oil cavity; a pressure oil one-way valve and an oil absorption one-way valve are respectively arranged in the hole at the end part of the inner side of the rotary valve core, and the pressure maintaining and oil drainage station of the hydraulic manual mechanism is realized by changing the position of the rotary valve core relative to the soft sealing structure and opening and closing the pressure oil one-way valve or the oil absorption one-way valve; the oil pressing station of the hydraulic manual mechanism is realized by driving a manual pump plunger of the manual hydraulic pump to open the oil pressing one-way valve.
The further technical scheme is as follows:
the inner hole of the manual hydraulic pump comprises an inner step hole for installing a rotary valve core and a floating oil cavity for floating of the soft sealing structure, an annular cavity is further arranged in the inner step hole, and the symmetrical center line of the rotary valve core is superposed with the axial lead of the soft sealing structure;
the contact end of the rotary valve core and the soft sealing structure is a convex drum-shaped sphere; the oil suction one-way valve is provided with an oil suction hole which is communicated with the annular cavity through a low-pressure oil through hole and an oil drainage hole which are arranged on the rotary valve core, and the annular cavity is communicated with an oil path inside the manual hydraulic pump; the oil pressing one-way valve is provided with an oil pressing valve seat hole which is communicated with an oil pressing hole arranged on the rotary valve core;
the soft sealing structure is a floating valve seat, the contact end of the floating valve seat and the rotary valve core is a concave spherical surface, the floating valve seat is provided with an oil through hole along the axial lead direction, the oil through hole is communicated with another oil circuit in the manual hydraulic pump through a floating oil cavity, and the outer ring of the floating valve seat is provided with a sealing ring;
the oil circuit in the manual hydraulic pump comprises a vertical hole and a first transverse hole which are arranged on the pump body and communicated with each other; the other oil path in the manual hydraulic pump comprises a second transverse hole and a side hole which are arranged on the pump body and communicated with each other;
the outer end face of the drum-shaped ball of the rotary valve core is supported and positioned by the inner end face of the supporting sleeve flange, and one end of the rotary valve core extending out of the supporting sleeve flange is connected with a handle;
the floating valve seat is made of a plastic structure, one end, which is not contacted with the drum-shaped ball body, of the floating valve seat is abutted against one end of the spring, and the other end of the spring is abutted against the sealing cover for sealing the floating oil cavity;
the hydraulic cylinder comprises an upper cover, a cylinder, a hydraulic cylinder barrel, a piston rod and a base, wherein one end of the hydraulic cylinder barrel is arranged in an inner ring groove of the base, an outer ring of the other end of the hydraulic cylinder barrel is connected with the upper cover, the cylinder is arranged between the adjacent upper cover and the base, the piston is matched with the inner periphery of the hydraulic cylinder barrel, one end of the piston rod is matched with the piston, and the other end of the piston rod penetrates through the base.
The invention has the following beneficial effects:
the hydraulic cylinder, the manual hydraulic pump and the oil tank are of an integrated structure, and the oil tank is communicated with the oil cavity on the cylinder barrel of the hydraulic cylinder, so that the design volume of the oil tank is greatly reduced. The oil pressing one-way valve and the oil absorption one-way valve of the manual hydraulic pump are arranged in the opening of the rotary valve core, and the handle of the rotary valve core can be rotated to enable the manual hydraulic pump to realize oil pressing, pressure maintaining and pressure releasing stations by arranging the soft sealing structure.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic sectional view of a manual hydraulic pump according to the present invention.
Fig. 3 is a partial cross-sectional view of the handle of the manual hydraulic pump of fig. 2 rotated 45 counterclockwise.
Fig. 4 is a partial cross-sectional view of the handle of the manual hydraulic pump of fig. 3 rotated 45 counterclockwise.
Wherein: 1. an upper cover; 2. a through hole; 3. a cylinder; 4. a hydraulic cylinder; 501. an upper oil cavity of the cylinder barrel; 502. a cylinder barrel lower oil cavity; 6. an oil tank; 7. a piston; 8. a piston rod; 9. a base; 10. a pump body; 11. a screw; 12. vertical holes; 13. a low-pressure oil through hole; 14. an oil drainage hole; 15. a short hole; 16. a first cross bore; 17. a high pressure oil hole; 18. a second cross bore; 19. a side hole; 20. a floating oil chamber; 21. a pressure oil one-way valve; 22. a pressure valve seat bore; 23. a communicating hole; 24. an oil suction one-way valve; 25. an oil suction hole; 26. a drum shaped sphere; 27. an annular cavity; 28. a manual pump plunger; 29. a handle; 30. a support sleeve flange; 31. a rotary valve core; 32. an oil pressing hole; 33. an oil through hole; 34. a seal ring; 35. a floating valve seat; 36. a spring.
Detailed Description
The following describes specific embodiments of the present invention.
As shown in fig. 1 and 2, the pressure maintaining single-acting hydraulic manual mechanism comprises a hydraulic cylinder, an oil tank 6 and a manual hydraulic pump which are integrally formed, wherein the upper part of the oil tank 6 is communicated with the inside of a cylinder barrel upper oil cavity 501 of the hydraulic cylinder through a through hole 2 of the hydraulic cylinder, the lower part of the oil tank 6 is communicated with an inner hole of the manual hydraulic pump through an oil passage, the inner hole of the manual hydraulic pump is communicated with a plunger oil cavity provided with a manual pump plunger 28 through a communication hole 23, a rotary valve core 31 and a soft sealing structure which are mutually abutted are arranged inside the manual hydraulic pump, and the inside of the manual hydraulic pump is also communicated with a cylinder barrel; a pressure oil one-way valve 21 and an oil absorption one-way valve 24 are respectively arranged in the opening hole at the end part of the inner side of the rotary valve core 31, and the pressure maintaining and oil drainage station of the hydraulic manual mechanism is realized by changing the position of the rotary valve core 31 relative to the soft sealing structure and opening and closing the pressure oil one-way valve 21 or the oil absorption one-way valve 24; the hydraulic oil station of the hydraulic manual mechanism is realized by driving a manual pump plunger 28 of the manual hydraulic pump to open the hydraulic oil one-way valve 21.
As shown in FIG. 2, the inner bore of the manual hydraulic pump includes an inner step hole for installing the rotary valve core 31 and a floating oil chamber 20 for floating the soft sealing structure, an annular chamber 27 is further provided in the inner step hole, and the symmetrical center line of the rotary valve core 31 coincides with the axial line of the soft sealing structure.
As shown in fig. 1 and 2, the contact end of the rotary valve core 31 and the soft sealing structure is a drum-shaped sphere 26 protruding outwards; the oil suction one-way valve 24 is provided with an oil suction hole 25, the oil suction hole 25 is communicated with the annular cavity 27 through a low-pressure oil through hole 13 and an oil drainage hole 14 which are arranged on the rotary valve core 31, and the annular cavity 27 is communicated with an oil circuit in the manual hydraulic pump; the oil pressing one-way valve 21 is provided with an oil pressing valve seat hole 22, and the oil pressing valve seat hole 22 is communicated with an oil pressing hole 32 formed on the rotary valve core 31. The outer end surface of the drum-shaped ball 26 of the rotary valve core 31 is supported and positioned by the inner end surface of the supporting sleeve flange 30, and one end of the rotary valve core 31 extending out of the supporting sleeve flange 30 is connected with the handle 29.
As shown in fig. 2, the soft sealing structure is a floating valve seat 35, a sealing ring 34 is arranged on an outer ring of the floating valve seat 35, a contact end of the floating valve seat 35 and the rotary valve element 31 is a concave spherical surface, an oil through hole 33 is formed in the floating valve seat 35 along the axial lead direction, and the oil through hole 33 is communicated with another oil path in the manual hydraulic pump through a floating oil chamber 20. The floating valve seat 35 is made of plastic, one end of the floating valve seat 35, which is not in contact with the drum-shaped ball 26, is in contact with one end of the spring 36, and the other end of the spring 36 is in contact with a sealing cover for sealing the floating oil chamber 20.
As shown in fig. 1, one oil path inside the manual hydraulic pump includes a vertical hole 12 and a first horizontal hole 16 which are opened on the pump body 10 and are communicated with each other; the other oil path inside the manual hydraulic pump includes a second cross hole 18 and a side hole 19 which are provided in the pump body 10 and communicate with each other.
As shown in fig. 1, the hydraulic cylinder includes an upper cover 1, a cylinder 3, a hydraulic cylinder 4, a piston 7, a piston rod 8 and a base 9, one end of the hydraulic cylinder 4 is installed in an inner ring groove of the base 9, an outer ring of the other end of the hydraulic cylinder 4 is connected with the upper cover 1, the cylinder 3 is arranged between the adjacent upper cover 1 and the base 9, the piston 7 is matched with the inner circumference of the hydraulic cylinder 4, one end of the piston rod 8 is matched with the piston 7, and the other end of the piston rod 8 passes through the base 9 (connected with a piston rod of a self-resetting actuator of the valve). The pump body 10 of the manual hydraulic pump is fixed to the side of the base 9 by screws 11.
The specific working process of the invention is as follows:
and (3) oil pressing state:
the pneumatic self-resetting valve is arranged at the upper part of a pneumatic self-resetting actuating mechanism of the valve, and when the pneumatic actuating mechanism of the valve cannot drive the valve due to faults, the valve is manually driven. When the plunger 28 of the manual hydraulic pump is manually lifted as shown in fig. 2, the oil suction check valve 24 is opened, and as shown in fig. 1, the oil in the oil tank 6 passes through the vertical hole 12, the first horizontal hole 16, the short hole 15, and enters the annular chamber 27, and then the oil enters the oil suction hole 25 through the oil discharge hole 14 and the low pressure oil passage hole 13, and then flows into the plunger oil chamber through the communication hole 23. When a manual pump plunger 28 of the manual hydraulic pump is pressed downwards, the oil pressing one-way valve 21 is opened, oil enters the oil pressing hole 32 from the oil pressing valve seat hole 22, then enters the floating oil cavity 20 through the oil through hole 33, and finally enters the cylinder barrel lower oil cavity 502 on the lower half part of the piston 7 through the high-pressure oil hole 17, the second transverse hole 18 and the side hole 19, the piston 7 and the piston rod 8 are pushed to move upwards, the reset spring force of the valve pneumatic actuating mechanism is overcome, and the valve is driven to be opened or closed. Because the volume of the oil tank 6 is small, during the rising process of the piston 7, the oil in the oil tank 6 is supplied to the insufficient oil amount part of the cylinder lower oil chamber 502 at the lower side of the piston 7, and the oil in the cylinder upper oil chamber 501 at the upper side of the piston 7 overflows during the rising process of the piston 7 and flows into the oil tank 6 through the through hole 2 of the upper cover 1 to continue the oil supply.
And (3) pressure maintaining state:
after the valve reaches the required position of opening or closing, the handle 29 is rotated 45 degrees counterclockwise from the position shown in fig. 1 and 2 to the position shown in fig. 3, the floating valve seat 35 is in close contact with the non-hole part of the drum-shaped ball 26 of the rotary valve core 31 under the action of the high-pressure oil in the floating oil chamber 20 and the spring 36, so that the soft sealing state with zero leakage is achieved, the oil through hole 33, the high-pressure oil hole 17, the second transverse hole 18 and the side hole 19 are cut off, and the manual hydraulic mechanism is in a reliable pressure maintaining state, so that the valve is kept at the required position.
Pressure relief state:
when the valve and its actuator return to normal state, the handle 29 is rotated counterclockwise again by 45 ° (i.e. rotated 90 ° relative to the initial position) from the position shown in fig. 3 to the position shown in fig. 4, at this time, the oil drain hole 14 of the drum-shaped ball 26 is communicated with the oil through hole 33 of the floating valve seat 35, and the oil in the cylinder lower oil chamber 502 at the bottom of the piston 7 flows back to the oil tank 6 through the side hole 19, the second cross hole 18, the high-pressure oil hole 17, the floating oil chamber 20, the oil through hole 33, the oil drain hole 14, the annular cavity 27, the short hole 15, the first cross hole 16, and the vertical. Since the volume of the oil tank 6 is small, during the lowering of the piston 7, the oil flowing out of the cylinder lower oil chamber 502 exceeds the volume of the oil tank 6, and overflows into the cylinder upper oil chamber 501 through the oil hole 2 of the upper cover 1 to be stored.
The hydraulic cylinder, the manual hydraulic pump and the oil tank are of an integrated structure, and the oil tank is communicated with the oil cavity on the cylinder barrel of the hydraulic cylinder, so that the design volume of the oil tank is greatly reduced. The oil pressing one-way valve and the oil absorption one-way valve of the manual hydraulic pump are arranged in the opening of the rotary valve core, and the handle of the rotary valve core can be rotated to enable the manual hydraulic pump to realize oil pressing, pressure maintaining and pressure releasing stations by arranging the soft sealing structure.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure thereof.
Claims (8)
1. Pressure retaining type single-action hydraulic manual mechanism, its characterized in that: the hydraulic cylinder is characterized by comprising an integrally formed hydraulic cylinder, an oil tank (6) and a manual hydraulic pump, wherein one end of the oil tank (6) is communicated with the inside of an upper oil cavity (501) of a cylinder barrel of the hydraulic cylinder through a through hole (2) of the hydraulic cylinder, the other end of the oil tank (6) is communicated with an inner hole of the manual hydraulic pump through an oil way, the inner hole of the manual hydraulic pump is communicated with a plunger oil cavity provided with a plunger (28) of the manual pump through a communication hole (23), a rotary valve core (31) and a soft sealing structure which are abutted to each other are arranged inside the manual hydraulic pump, and the inside of the manual hydraulic pump is also communicated with a lower oil; a pressure oil one-way valve (21) and an oil absorption one-way valve (24) are respectively arranged in the opening hole at the end part of the inner side of the rotary valve core (31), and the pressure maintaining and oil drainage station of the hydraulic manual mechanism is realized by changing the position of the rotary valve core (31) relative to the soft sealing structure and opening and closing the pressure oil one-way valve (21) or the oil absorption one-way valve (24); the oil pressing station of the hydraulic manual mechanism is realized by driving a manual pump plunger (28) of the manual hydraulic pump to open an oil pressing one-way valve (21).
2. A pressure maintaining single acting hydraulic hand operated mechanism as claimed in claim 1 wherein: the inner hole of the manual hydraulic pump comprises an inner step hole for installing a rotary valve core (31) and a floating oil cavity (20) for floating of the soft sealing structure, an annular cavity (27) is further arranged in the inner step hole, and the symmetrical center line of the rotary valve core (31) is overlapped with the axial lead of the soft sealing structure.
3. A pressure maintaining single acting hydraulic hand operated mechanism as claimed in claim 2 wherein: the contact end of the rotary valve core (31) and the soft sealing structure is a convex drum-shaped sphere (26); an oil suction hole (25) is formed in the oil suction one-way valve (24), the oil suction hole (25) is communicated with the annular cavity (27) through a low-pressure oil through hole (13) and an oil drainage hole (14) which are formed in the rotary valve core (31), and the annular cavity (27) is communicated with an oil way in the manual hydraulic pump; the oil pressing check valve (21) is provided with an oil pressing valve seat hole (22), and the oil pressing valve seat hole (22) is communicated with an oil pressing hole (32) formed in the rotary valve core (31).
4. A pressure maintaining single acting hydraulic hand operated mechanism as claimed in claim 3 wherein: the soft sealing structure is a floating valve seat (35), the contact end of the floating valve seat (35) and the rotary valve core (31) is a concave spherical surface, an oil through hole (33) is formed in the floating valve seat (35) along the axial lead direction, the oil through hole (33) is communicated with another oil way in the manual hydraulic pump through a floating oil cavity (20), and a sealing ring (34) is arranged on the outer ring of the floating valve seat (35).
5. A pressure maintaining single acting hydraulic hand operated mechanism as claimed in claim 3 wherein: an oil path in the manual hydraulic pump comprises a vertical hole (12) and a first transverse hole (16), wherein the vertical hole (12) and the first transverse hole are formed in the pump body (10) and are communicated with each other; the other oil circuit inside the manual hydraulic pump comprises a second transverse hole (18) and a side hole (19) which are arranged on the pump body (10) and communicated with each other.
6. The pressure maintaining single acting hydraulic hand operated mechanism of claim 4, wherein: the outer end face of a drum-shaped ball (26) of the rotary valve core (31) is supported and positioned by the inner end face of a supporting sleeve flange (30), and one end, extending out of the supporting sleeve flange (30), of the rotary valve core (31) is connected with a handle (29).
7. The pressure maintaining single acting hydraulic hand operated mechanism of claim 4, wherein: the floating valve seat (35) is made of a plastic structure, one end, which is not contacted with the drum-shaped ball body (26), of the floating valve seat (35) is abutted against one end of a spring (36), and the other end of the spring (36) is abutted against a sealing cover for sealing the floating oil cavity (20).
8. A pressure maintaining single acting hydraulic hand operated mechanism as claimed in claim 1 wherein: the hydraulic cylinder comprises an upper cover (1), a cylinder (3), a hydraulic cylinder barrel (4), a piston (7), a piston rod (8) and a base (9), one end of the hydraulic cylinder barrel (4) is installed in an inner ring groove of the base (9), an outer ring of the other end of the hydraulic cylinder barrel (4) is connected with the upper cover (1), the cylinder (3) is arranged between the adjacent upper cover (1) and the base (9), the piston (7) is matched with the inner periphery of the hydraulic cylinder barrel (4), one end of the piston rod (8) is matched with the piston (7), and the other end of the piston rod (8) penetrates through the base (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911369455.XA CN110939618A (en) | 2019-12-26 | 2019-12-26 | Pressure maintaining type single-action hydraulic manual mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911369455.XA CN110939618A (en) | 2019-12-26 | 2019-12-26 | Pressure maintaining type single-action hydraulic manual mechanism |
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| CN110939618A true CN110939618A (en) | 2020-03-31 |
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| CN201911369455.XA Pending CN110939618A (en) | 2019-12-26 | 2019-12-26 | Pressure maintaining type single-action hydraulic manual mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114645966A (en) * | 2022-04-14 | 2022-06-21 | 中国船舶重工集团公司第七0七研究所九江分部 | Manual hydraulic switching device for hydraulic valve driving device |
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