CN108266414B - Cartridge formula overload oil compensating valve - Google Patents
Cartridge formula overload oil compensating valve Download PDFInfo
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- CN108266414B CN108266414B CN201810037109.0A CN201810037109A CN108266414B CN 108266414 B CN108266414 B CN 108266414B CN 201810037109 A CN201810037109 A CN 201810037109A CN 108266414 B CN108266414 B CN 108266414B
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- oil
- valve
- hole
- valve seat
- oil port
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- 230000000670 limiting effect Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 239000013589 supplement Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 4
- 238000005034 decoration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000149 penetrating effect 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
- 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
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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
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/004—Cartridge valves
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- Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a plug-in type overload oil replenishing valve, which comprises a valve body provided with a P oil port and a valve seat connected in the valve body in a sliding way, a through hole A is arranged in the valve seat along the axial direction of the valve seat, a first spring for forcing the valve seat to be far away from the oil port P is arranged between the oil port P and the valve seat in the valve body, a hollow threaded sleeve for limiting the valve seat to be separated from the valve body is arranged in the valve body, a T oil port matched with the P oil port is arranged on the threaded sleeve, a valve core and a second spring which forces the valve core to move towards the through hole A are connected in the threaded sleeve in a sliding way, and an adjusting rod for adjusting the pretightening force of the second spring, wherein a shoulder A which is matched with the valve core to play a limiting role is also arranged in the screw sleeve, the valve core is provided with an oil through hole so that the oil pressure of the T oil port can act on the upper end face of the valve seat conveniently; the valve has simple structure and convenient processing, and can quickly buffer impact pressure and quickly supplement oil.
Description
Technical Field
The invention relates to the technical field of hydraulic valves, in particular to a plug-in type overload oil replenishing valve.
Background
At present, valves which are produced and used in China and used for performing overpressure overflow and negative pressure oil supplement on hydraulic elements such as oil cylinders and the like are mostly in two structural modes, one is a combined valve with an overload overflow valve and a negative pressure oil supplement valve which are arranged in a split mode, the other is a cartridge valve with a pilot valve and an overload overflow valve and a negative pressure oil supplement valve which are arranged in an integrated mode, and the two valves can play the functions of overload protection and negative pressure oil supplement; however, the former has large volume and more material consumption because the valve bodies are respectively arranged, and the application of the former is limited by the use space because of the large volume; although the overload overflow and oil supplement are integrated in one valve body, the problems of large volume and large material consumption are solved, the overload overflow needs to push the main overflow valve core by the pilot valve, and the structure can cause slow overload overflow reaction and insensitive action.
Disclosure of Invention
Technical problem to be solved
The invention aims to overcome the defects in the prior art and provides a plug-in type overload oil replenishing valve which is simple in structure, convenient to machine and capable of quickly buffering impact pressure and quickly replenishing oil.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a plug-in type overload oil replenishing valve comprises a valve body and a valve seat, wherein the valve body is provided with a P oil port, the valve seat is slidably connected in the valve body, a through hole A is formed in the valve seat along the axial direction of the valve seat, a first spring for forcing the valve seat to be far away from the P oil port is arranged between the P oil port and the valve seat in the valve body, a hollow screw sleeve for limiting the valve seat to be separated from the valve body is arranged in the valve body, a T oil port which is matched with the P oil port is arranged on the screw sleeve, a slidable valve core for controlling the on-off of the hole A of the through hole and a second spring for forcing the valve core to move towards the through hole A are arranged in the screw sleeve, an adjusting rod for adjusting the pretightening force of the second spring is arranged in the; and the valve core is provided with an oil through hole so that the oil pressure of the T oil port acts on the upper end surface of the valve seat.
Through the technical scheme, when the valve overflows in an overload mode, the oil pressure of the P oil port acts on the valve seat, the valve seat is upwards jacked to be abutted to the lower end face of the threaded sleeve, meanwhile, the pressure of the P oil port acts on the valve core, when the valve core is enough to overcome the acting force of the second spring due to the upward acting force generated by the pressure of the P oil port, the valve core slides upwards, oil flows into the T oil port through the P oil port, the through hole A and the oil through hole, the overload overflow effect is achieved, after the pressure of the P oil port is lower than the pressure set by the second spring, the through hole A on the valve seat is closed again due to the downward movement of the valve core, and the P oil port and the. When the pressure of the P oil port generates negative pressure due to the movement of the hydraulic cylinder or the hydraulic motor, oil of the T oil port acts on the valve seat through the oil hole, the acting force of the first spring is overcome to push the valve seat open, and the oil flows into the P oil port to supplement oil.
In a further technical scheme, the stiffness coefficient of the first spring is far smaller than that of the second spring, and the acting area of the pressure of the T oil port on the valve seat is larger than that of the pressure of the P oil port on the valve core; the pressure of the overload overflow can be adjusted to be higher, and when oil is replenished, the through hole A can be opened for replenishing oil due to small pressure difference.
In a further technical scheme, the valve core comprises a cylindrical section matched with the shoulder A and a ball conical section arranged on the cylindrical section and used for controlling the on-off of the through hole A, a second oil through hole is formed in the cylindrical section along the axial direction of the cylindrical section, and a first oil through hole communicated with the second oil through hole is formed in the side face of the ball conical section.
In a further technical scheme, the T oil port is arranged at one end, far away from the valve seat, of the screw sleeve, and a through hole B is formed in the adjusting rod in the axial direction of the adjusting rod.
In a further technical scheme, a bushing is arranged between the valve core and the adjusting rod in the threaded sleeve, the second spring is sleeved on the bushing, a convex edge for abutting against the second spring is arranged at one end, in contact with the valve core, of the bushing, the other end of the bushing is inserted into the adjusting rod, and a through third oil through hole is formed in the bushing in the axial direction of the bushing.
In a further technical scheme, a shoulder B which is matched with the threaded sleeve and plays a limiting role is arranged in the valve body.
In a further technical scheme, the side of the valve seat is provided with an annular groove A for placing a sealing ring.
In a further technical scheme, an annular groove B for placing a sealing ring is formed in the side face, close to the oil port P, of the valve body.
(III) advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages: when the valve is in overload overflow, the oil pressure of the P oil port acts on the valve seat, the valve seat is upwards jacked to be abutted against the lower end face of the threaded sleeve, meanwhile, the pressure of the P oil port acts on the valve core, when the upward acting force generated by the pressure of the P oil port of the valve core is enough to overcome the acting force of the second spring, the valve core slides upwards, oil flows into the T oil port through the P oil port, the through hole A and the oil through hole, the overload overflow effect is achieved, after the pressure of the P oil port is lower than the pressure set by the second spring, the valve core moves downwards to close the through hole A on the valve seat again, and the P oil port and the T oil port are cut off. When the pressure of the oil port P generates negative pressure due to the movement of the hydraulic cylinder or the hydraulic motor, oil of the oil port T acts on the valve seat through the oil hole, the valve seat is pushed open by overcoming the acting force of the first spring, and the oil flows into the oil port P to supplement the oil; the structure is simple, the processing is convenient, and the impact pressure can be quickly buffered and the oil can be quickly supplemented; in addition, the stiffness coefficient of the first spring is far smaller than that of the second spring, the acting area of the pressure of the T oil port on the valve seat is larger than that of the pressure of the P oil port on the valve core, the ratio of the pressure of overload overflow can be adjusted through the arrangement, and when oil is replenished, the through hole A can be opened for oil replenishment due to small pressure difference.
Drawings
FIG. 1 is a schematic cross-sectional view illustrating a cartridge type overload oil compensating valve according to the present embodiment;
FIG. 2 is a schematic sectional view of the valve body according to the present embodiment;
FIG. 3 is a schematic sectional view of the valve cartridge in the present embodiment;
fig. 4 is a schematic cross-sectional structure diagram of the screw insert in this embodiment.
The reference numbers correspond to the part names: 1. a valve body; 2. a valve seat; 3. a first spring; 4. a threaded sleeve; 5. a valve core; 6. a second spring; 7. adjusting a rod; 8. a bushing; 101, P oil port; 102. a shoulder B; 103. an annular groove B; 201. a through hole A; 202. an annular groove A; 401, a T oil port; 402. a shoulder A; 501. a cylindrical section; 502. a ball cone section; 503. a second oil through hole; 504. a first oil passage; 701. a through hole B; 801. a convex edge; 802. and the third oil through hole.
Detailed Description
Referring to fig. 1-4, the invention provides a plug-in type overload oil compensating valve, which includes a valve body 1 having a P oil port 101, and a valve seat 2 slidably connected in the valve body 1, wherein a through hole a 201 is axially formed in the valve seat 2, a first spring 3 for forcing the valve seat 2 to be away from the P oil port 101 is arranged between the P oil port 101 and the valve seat 2 in the valve body 1, a hollow threaded sleeve 4 for limiting the valve seat 2 to be separated from the valve body 1 is arranged in the valve body 1, a T oil port 401 cooperating with the P oil port 101 is arranged at one end of the threaded sleeve 4 away from the valve seat 2, a slidable valve core 5 for controlling the opening and closing of the through hole a 201, a second spring 6 for forcing the valve core 5 to move towards the through hole a 201, and an adjusting rod 7 for adjusting the pre-tightening force of the second spring 6 are arranged in the threaded sleeve 4, a through hole B701 is formed in the adjusting rod 7 along the axial direction of the adjusting rod, and a shoulder A402 which is matched with the valve core 5 to play a limiting role is further arranged in the threaded sleeve 4; the valve core 5 includes a cylindrical section 501 matched with the shoulder a 402, and a ball-cone section 502 arranged on the cylindrical section 501 and used for controlling the on-off of the through hole a 201, a second oil through hole 503 is arranged in the cylindrical section 501 along the axial direction thereof, a first oil through hole 504 communicated with the second oil through hole 503 is arranged on the side surface of the ball-cone section 502, and the first oil through hole 504 and the second oil through hole 503 are arranged so that the oil pressure of the T oil port 401 can be applied to the upper end surface of the valve seat 2.
A bushing 8 is arranged between the valve core 5 and the adjusting rod 7 in the threaded sleeve 4, the second spring 6 is sleeved on the bushing 8, a convex edge 801 used for abutting against the second spring 6 is arranged at one end, in contact with the valve core 5, of the bushing 8, the other end of the bushing 8 is inserted into the adjusting rod 7, and a third through oil hole 802 penetrating through the bushing 8 is arranged in the axial direction of the bushing.
When the valve is in overload overflow, the oil pressure of the P oil port 101 acts on the valve seat 2, the valve seat 2 is pushed upwards to abut against the lower end face of the threaded sleeve 4, meanwhile, the pressure of the P oil port 101 acts on the valve core 5, when the upward acting force generated by the pressure of the P oil port 101 of the valve core 5 is enough to overcome the acting force of the second spring 6, the valve core 5 slides upwards, oil flows into the T oil port 401 through the P oil port 101, the through hole A201, the first oil through hole 504, the second oil through hole 503, the third oil through hole 802 and the through hole B701, the overload overflow effect is achieved, when the pressure of the P oil port 101 is lower than the set pressure of the second spring 6, the valve core 5 moves downwards to close the through hole A201 on the valve seat 2 again, and the P oil ports 101 and the T. When the pressure of the P oil port 101 generates negative pressure due to the movement of the hydraulic cylinder or the hydraulic motor, the oil of the T oil port 401 acts on the valve seat 2 through the through hole B701, the third oil passing hole 802, the second oil passing hole 503 and the first oil passing hole 504, the valve seat 2 is pushed open by overcoming the acting force of the first spring 3, and the oil flows into the P oil port 101 from the through hole a 201 to supplement the oil.
The stiffness coefficient of the first spring 3 is far smaller than that of the second spring 6, and the acting area of the pressure of the T oil port 401 on the valve seat 2 is larger than that of the pressure of the P oil port 101 on the valve core 5; the pressure of the overload overflow can be adjusted to be higher, and when oil is supplemented, the through hole A201 can be opened for oil supplement due to small pressure difference.
A shoulder B102 which is matched with the threaded sleeve 4 and has a limiting effect is arranged in the valve body 1; the side surface of the valve seat 2 is provided with an annular groove A202 for placing a sealing ring; and an annular groove B103 for placing a sealing ring is arranged on the side surface of the valve body 1 close to the P oil port 101.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The plug-in type overload oil replenishing valve is characterized by comprising a valve body (1) provided with a P oil port (101) and a valve seat (2) connected in the valve body (1) in a sliding manner, wherein a through hole A (201) is formed in the valve seat (2) along the axial direction of the valve seat, a first spring (3) forcing the valve seat (2) to be far away from the P oil port (101) is arranged between the P oil port (101) and the valve seat (2) in the valve body (1), a hollow threaded sleeve (4) used for limiting the valve seat (2) to be separated from the valve body (1) is arranged in the valve body (1), a T oil port (401) matched with the P oil port (101) for working is arranged on the threaded sleeve (4), a slidable valve core (5) used for controlling the on-off of the through hole A (201) and a second spring (6) forcing the valve core (5) to move towards the through hole A (201) are arranged in the threaded sleeve (, the adjusting rod (7) is used for adjusting the pretightening force of the second spring (6), and a shoulder A (402) which is matched with the valve core (5) to play a limiting role is further arranged in the threaded sleeve (4);
an oil through hole is formed in the valve core (5) so that oil pressure of the T oil port (401) can act on the upper end face of the valve seat (2);
the valve core (5) comprises a cylindrical section (501) matched with the shoulder A (402) and a ball conical section (502) arranged on the cylindrical section (501) and used for controlling the on-off of the through hole A (201), a second oil through hole (503) is formed in the cylindrical section (501) along the axial direction of the cylindrical section, and a first oil through hole (504) communicated with the second oil through hole (503) is formed in the side surface of the ball conical section (502);
the T oil port (401) is arranged at one end, far away from the valve seat (2), of the threaded sleeve (4), and a through hole B (701) is formed in the adjusting rod (7) in the axial direction of the adjusting rod.
2. The cartridge type overload oil compensating valve according to claim 1, wherein the stiffness coefficient of the first spring (3) is far smaller than that of the second spring (6), and the acting area of the pressure of the T oil port (401) on the valve seat (2) is larger than that of the pressure of the P oil port (101) on the valve core (5).
3. The cartridge type overload oil compensating valve according to claim 1, wherein a bushing (8) is arranged between the valve core (5) and the adjusting rod (7) in the screw sleeve (4), the second spring (6) is sleeved on the bushing (8), a convex edge (801) for abutting against the second spring (6) is arranged at one end of the bushing (8) contacting with the valve core (5), the other end of the bushing (8) is inserted into the adjusting rod (7), and a third through oil hole (802) is arranged in the bushing (8) and penetrates through the bushing in the axial direction.
4. The cartridge type overload oil compensating valve according to claim 1, wherein a shoulder B (102) which is matched with the screw sleeve (4) and has a limiting function is arranged in the valve body (1).
5. The cartridge type overload oil compensating valve according to claim 1, characterized in that the side of the valve seat (2) is provided with an annular groove A (202) for placing a sealing ring.
6. The cartridge type overload oil compensating valve according to claim 1, wherein an annular groove B (103) for placing a sealing ring is arranged on the side surface of the valve body (1) close to the P oil port (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037109.0A CN108266414B (en) | 2018-01-15 | 2018-01-15 | Cartridge formula overload oil compensating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810037109.0A CN108266414B (en) | 2018-01-15 | 2018-01-15 | Cartridge formula overload oil compensating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108266414A CN108266414A (en) | 2018-07-10 |
| CN108266414B true CN108266414B (en) | 2020-09-18 |
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ID=62775453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810037109.0A Active CN108266414B (en) | 2018-01-15 | 2018-01-15 | Cartridge formula overload oil compensating valve |
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| Country | Link |
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| CN (1) | CN108266414B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074155A (en) * | 2021-04-02 | 2021-07-06 | 同济大学 | Negative pressure opening plug-in mounting type oil replenishing valve |
| CN113623350B (en) * | 2021-08-12 | 2024-06-21 | 常州普宸电子有限公司 | Built-in adjustable electromagnetic valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2625680Y (en) * | 2003-07-04 | 2004-07-14 | 天津特精液压股份有限公司 | Plug-in mounting straight moving type dual-purpose safety valve controlling balance inside and outside |
| WO2010094411A1 (en) * | 2009-02-19 | 2010-08-26 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Pilot operated check valve |
| CN102878136B (en) * | 2012-09-21 | 2015-08-12 | 广西柳工机械股份有限公司 | Screw-in cartridge valve |
| CN203098472U (en) * | 2013-01-30 | 2013-07-31 | 上海强田液压技术有限公司 | Direct-acting type overload oil-recharging valve |
| CN103075382B (en) * | 2013-02-04 | 2016-02-03 | 陕西航天动力高科技股份有限公司 | The Compact overload oil supplementation valve that a kind of damping is variable |
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2018
- 2018-01-15 CN CN201810037109.0A patent/CN108266414B/en active Active
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| Publication number | Publication date |
|---|---|
| CN108266414A (en) | 2018-07-10 |
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Effective date of registration: 20200825 Address after: 224700 Yancheng City Jianhu County, Jiangsu Province Economic Development Zone No. 19 North Star Applicant after: Yancheng Baotong Machinery Technology Co.,Ltd. Address before: 315000 No. 510 Chuangyuan Road, Ningbo National High-tech Zone, Zhejiang Province Applicant before: Shao Likun |
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