CN110195726B - Charging valve, charging valve mounting structure and hydraulic machine - Google Patents
Charging valve, charging valve mounting structure and hydraulic machine Download PDFInfo
- Publication number
- CN110195726B CN110195726B CN201910376296.XA CN201910376296A CN110195726B CN 110195726 B CN110195726 B CN 110195726B CN 201910376296 A CN201910376296 A CN 201910376296A CN 110195726 B CN110195726 B CN 110195726B
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- oil
- oil inlet
- valve
- hole
- port
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- 239000007788 liquid Substances 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 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
- F15B13/024—Pressure relief valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a liquid filling valve, a liquid filling valve mounting structure and a hydraulic machine, which comprise a valve body and a valve core, wherein the valve core is positioned in the valve body, one end of the valve body is provided with a first oil inlet, the other end of the valve body is provided with a first oil through hole, the outer wall of the valve body is provided with a second oil through hole and a second oil inlet, the valve core is movably arranged between the first oil inlet and the first oil through hole, when the valve core is positioned at the first oil through hole, the first oil through hole and the second oil through hole are disconnected, the first oil inlet is used for enabling the valve core to move from the first oil inlet to the first oil through hole, a buoyancy cavity communicated with the second oil inlet is arranged between the outer wall of the valve core and the inner wall of the valve body, the second oil inlet is used for enabling the valve core to move from the first oil through hole to the first oil inlet, the number of the second oil through holes is multiple, the inner wall of the valve body is provided with an annular cavity, and the second oil through hole is communicated with the annular cavity. The first oil through hole and the second oil through hole have larger unloading area after the first oil through hole and the valve core are separated, so that the unloading speed is high.
Description
[ field of technology ]
The invention relates to a liquid filling valve, a liquid filling valve mounting structure and a hydraulic machine, and belongs to the field of hydraulic machines.
[ background Art ]
The liquid filling valve for the hydraulic machine has the functions of quickly replenishing oil when the oil cylinder descends due to self weight and discharging oil when the oil cylinder returns. The main problems of the prior filling valve are as follows:
1. the spring is easy to damage due to the spring in the sealing process;
2. when the liquid filling valve is opened, the pressure of the high pressure side of the oil cylinder needs to be relieved, the valve core is opened close to the piston rod of the small oil cylinder above the valve core after the pressure is reduced, and in general, the high pressure side of the oil cylinder is difficult to completely relieve the pressure, so that the piston rod of the small oil cylinder is bent and damaged;
3. because the opening of the liquid filling valve needs to unload the oil cylinder firstly, the opening is realized by connecting a relatively slender oil pipe to the oil cylinder, the slender oil pipe causes incomplete pressure relief, and meanwhile, the pressure relief time is relatively long;
4. the impact in the oil cylinder pressure relief process is serious.
[ invention ]
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a liquid filling valve with high liquid filling speed.
The utility model provides a liquid filling valve, includes valve body and case, and the case is located the valve body, first oil inlet has been seted up to the one end of valve body, first oil port has been seted up to the other end, second oil port and second oil inlet have been seted up to the outer wall of valve body, the case activity sets up between first oil inlet and first oil port, in order to control the intercommunication state of first oil port and second oil port, when the case is located first oil port department, break off between first oil port and the second oil port, first oil inlet advances oil and makes the case remove from first oil inlet to first oil port, be provided with the buoyancy chamber with the second oil inlet intercommunication between case outer wall and the valve body inner wall, second oil inlet is to buoyancy chamber oil so that the case removes from first oil port to first oil inlet, second oil port quantity is provided with the annular chamber, second oil port and annular chamber intercommunication.
The beneficial effects of the invention are as follows:
the first oil inlet is used for feeding oil, so that the valve core is pushed to the first oil through port from the first oil inlet. When the valve core does not reach the first oil through hole, the second oil through hole can be communicated with the first oil through hole through the annular cavity, so that the purpose of filling oil into the oil cylinder through the first oil through hole is achieved. When the valve core moves to the first oil through port, the second oil through port and the first oil through port are blocked. When the oil is required to be reset, the oil is conveyed to the buoyancy cavity through the second oil inlet, and the oil inlet of the first oil inlet is reduced or blocked, so that the valve core moves from the first oil through port to the first oil inlet again, resetting is realized, the second oil through port is communicated with the first oil through port again, and pressure relief is carried out on the oil cylinder. The first oil through hole and the second oil through hole have larger unloading area after the first oil through hole and the valve core are separated, so that the unloading speed is high. In the resetting and unloading process of the valve core, the piston of the oil cylinder can synchronously return, so that the working efficiency is greatly improved.
The liquid filling valve further comprises a guide pipe, one end of the valve core, which is close to the first oil inlet, is provided with a guide groove, one end of the guide pipe is communicated with the first oil inlet, and the other end of the guide pipe is movably arranged in the guide groove.
An energy accumulator is arranged at the second oil inlet.
The edge of the first oil through hole is provided with an on-off step, and when the valve core is positioned at the first oil through hole, the valve core contacts with the on-off step to block an oil way between the second oil through hole and the first oil through hole.
The valve core is provided with an oil through groove which penetrates along the opposite direction of the first oil inlet and the first oil through hole.
The utility model provides a charging valve mounting structure, includes hydro-cylinder and charging valve, the hydro-cylinder includes cylinder body and the piston of activity in the cylinder body, is provided with the third oil port on the cylinder body, and first oil port and third oil port intercommunication.
The cylinder body is also provided with a third oil inlet.
The second oil through port is communicated with the oil tank.
A hydraulic machine includes a charge valve.
Other features and advantages of the present invention will be disclosed in the following detailed description of the invention and the accompanying drawings.
[ description of the drawings ]
The invention is further described with reference to the accompanying drawings:
FIG. 1 is a schematic cross-sectional front view of a filling valve mounting structure according to an embodiment of the present invention.
[ detailed description ] of the invention
The technical solutions of the embodiments of the present invention will be explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present invention.
In the following description, directional or positional relationships such as the terms "inner", "outer", "upper", "lower", "left", "right", etc., are presented for convenience in describing the embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Examples:
referring to fig. 1, the present embodiment shows a charging valve mounting structure of a hydraulic machine, including an oil cylinder and a charging valve. The liquid filling valve comprises a valve body 1 and a valve core 2, wherein the valve core 2 is positioned in the valve body 1, a cavity is formed in the middle of the valve body 1, and the valve core 2 is movably arranged in the cavity.
The upper end of the valve body 1 is provided with a first oil inlet 3, the lower end of the valve body is provided with a first oil through port 4, the first oil through port 4 is communicated to the inside of the oil cylinder, the outer wall of the valve body 1 is provided with a second oil through port 5, and the valve core 2 is movably arranged between the first oil inlet 3 and the first oil through port 4. In the initial state, the valve core 2 is positioned at the first oil inlet 3, and the first oil inlet 3 is used for taking oil so as to push the valve core 2 to move from the first oil inlet 3 to the first oil through port 4. Before the valve core 2 reaches the first oil through hole 4, the communication state of the first oil through hole 4 and the second oil through hole 5 is kept, so that the purpose of conveying oil from the second oil through hole 5 to the first oil through hole 4 is achieved. When the valve core 2 reaches the first oil through hole 4, the second oil through hole 5 and the first oil through hole 4 are blocked, and the second oil through hole 5 cannot convey oil to the first oil through hole 4.
In this embodiment, the method for blocking the second oil through port 5 when the valve core 2 reaches the first oil through port 4 is as follows: the edge of the first oil through hole 4 is provided with an on-off step 18, when the valve core 2 is positioned at the first oil through hole 4, the valve core 2 is in contact sealing with the on-off step 18, and the contact surface of the valve core 2 and the on-off step 18 blocks the second oil through hole 5 on the side wall of the valve body 1 from communicating oil to the first oil through hole 4 at the bottom of the valve body 1.
The position on the on-off step 18, which can be in contact with the valve core 2, can be ground to form a grinding matching surface matched with the shape of the valve core 2, and when the valve core 2 runs to the first oil through port 4, the valve core 2 and the grinding matching surface are mutually extruded so as to further improve the sealing effect between the valve core 2 and the on-off step 18.
In this embodiment, the number of the second oil through holes 5 is plural, all the second oil through holes 5 are circumferentially distributed around the outer wall of the valve body 1, the inner wall of the valve body 1 is provided with an annular cavity 19, all the second oil through holes 5 are communicated with the annular cavity 19, when the valve core 2 passes through the annular cavity 19 before being extruded by the grinding matching surface, the oil through area of the second oil through holes 5 in the valve body 1 is the area of the annular cavity 19 which is not blocked by the valve core 2, the change of the oil through holes is approximately in a linear relation with the moving distance of the valve core 2, and the oil through area of the second oil through holes 5 in the valve body 1 can be linearly adjusted correspondingly by adjusting the position of the valve core 2.
The side wall of the valve body 1 is provided with a second oil inlet 6, an buoyancy chamber 13 communicated with the second oil inlet 6 is arranged between the outer wall of the valve core 2 and the inner wall of the valve body 1, and the chamber wall of the buoyancy chamber 13 is formed by the outer wall of the valve core 2 and the inner wall of the valve body 1, and oil is only fed in and discharged out from the position of the second oil inlet 6. When the valve core 2 is positioned at the first oil through hole 4, the second oil inlet 6 conveys oil to the buoyancy cavity 13, so that the valve core 2 moves towards the first oil inlet 3, and the first oil through hole 4 is communicated with the second oil through hole 5 through the annular cavity 19.
The purpose of controlling the communication state of the first oil through port 4 and the second oil through port 5 is achieved through the moving process of the valve core 2.
Preferably, the charging valve further comprises a guide pipe 7, the upper end of the guide pipe 7 is communicated with the first oil inlet 3, one end, close to the first oil inlet 3, of the valve core 2 is provided with a guide groove 8, the lower end of the guide pipe 7 is movably arranged in the guide groove 8, and when the corresponding valve core 2 moves, the lower end of the guide pipe 7 moves in the guide groove 8, so that oil entering from the first oil inlet 3 is accurately injected into the guide groove 8 through the guide pipe 7, oil entering from the first oil inlet 3 is prevented from entering into the first oil through port 4, and meanwhile, the thrust of the oil entering from the first oil inlet 3 to the valve core 2 is increased.
The liquid filling valve further comprises a valve seat 14 and a fixing screw 15, the oil cylinder comprises a cylinder body 9 and a piston 10 movably arranged in the cylinder body 9, the valve seat 14 is fixed on the cylinder body 9 through the fixing screw 15, the second oil through hole 5 is communicated with an oil tank, and the oil tank supplies oil to the second oil through hole 5 powerlessly and rapidly.
The cylinder body 9 is provided with a third oil port 11, and the first oil port 4 is communicated with the third oil port 11. The piston 10 is movably far away from the third oil through hole 11 under the action of gravity, so that negative pressure is gradually formed inside the cylinder 9, and oil in the oil tank sequentially passes through the second oil through hole 5, the first oil through hole 4 and the third oil through hole 11 to be supplemented into the cylinder 9 under the condition that the valve core 2 does not block the second oil through hole 5, so that quick oil filling inside the cylinder 9 is realized. And in the same way, when the piston 10 returns, the oil can be quickly discharged through the first oil through port 4 and the second oil through port 5 in the communicated state.
The cylinder body 9 is also provided with a third oil inlet 12, and the valve core 2 is provided with an oil through groove 17 penetrating along the opposite direction of the first oil inlet 3 and the first oil through hole 4. When the piston 10 is far away from the third oil port 11, if the valve core 2 is located at the first oil through port 4, an oil cavity 16 is formed between the valve core 2 and the valve body 1, the corresponding oil cavity 16 is communicated to the third oil through port 11 through the oil through groove 17, and high-pressure oil is pumped into the third oil port 12, and is filled into the oil cavity 16 through the third oil port 11. In addition, the oil cavity 16 is communicated with the first oil through hole 4 through the oil through hole 17, the pressure in the oil cavity 16 is the same as the pressure in the first oil through hole 4, and the stress areas on the upper side and the lower side of the valve core 2 are close, so that the pressure on the upper side and the lower side of the valve core 2 is close, the annular cavity 19 can be stably blocked by the valve core 2 through smaller pressure at the first oil inlet 3, in the same way, when the annular cavity 19 is blocked, the oil through the first oil inlet 3 is removed, the valve core 2 can be moved upwards only by introducing small hydraulic pressure at the second oil inlet 6, the first oil through hole 4 is communicated with the annular cavity 19 again, and meanwhile, the return is stable.
In this embodiment, the on/off of the second oil inlet 6 may be controlled by an electromagnetic valve, or an accumulator may be installed at the second oil inlet 6.
In the embodiment, the liquid filling valve does not have a spring, and the oil cylinder also does not have a piston rod, so that the problem that the spring and the piston rod are easy to break does not exist. The annular cavity 19 and the plurality of second oil through holes 5 enable the valve core 2 to have a pressure relief area larger than that of the existing oil through pipe as long as the valve core 2 is slightly opened, the oil cylinder can be communicated to the oil tank through the second oil through holes 5 to relieve pressure in a very short time, the oil inlet and outlet speed in the cylinder body 9 is increased, and the waiting time is reduced.
While the invention has been described in terms of embodiments, it will be appreciated by those skilled in the art that the invention is not limited thereto but rather includes the drawings and the description of the embodiments above. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.
Claims (6)
1. The utility model provides a liquid filling valve, including valve body and case, the case is located the valve body, first oil inlet has been seted up to the one end of valve body, first oil inlet has been seted up to the other end, second oil inlet and second oil inlet have been seted up to the outer wall of valve body, the case activity sets up between first oil inlet and first oil inlet, in order to control the intercommunication state of first oil inlet and second oil inlet, first oil inlet advances oil and makes the case follow first oil inlet to first oil inlet removal, when the case is located first oil inlet department, break off between first oil inlet and the second oil inlet, be provided with the buoyancy chamber with second oil inlet intercommunication between case outer wall and the valve body inner wall, second oil inlet is to the buoyancy chamber oil that leads to so that the case removes from first oil inlet to first oil inlet, second oil inlet quantity has a plurality of, the valve body inner wall is provided with annular chamber, second oil inlet and annular chamber intercommunication, the liquid filling valve still includes the guide tube, the guide groove has been seted up to the one end that the first oil inlet is close to first oil inlet, the other end activity setting of guide tube is in the guide groove, first oil inlet department has the step department to set up with first oil inlet, when first oil inlet department has the first oil inlet to break-make the opposite to break-make the first oil inlet, the case has the relative oil inlet to break-make the first oil inlet to break-make the valve.
2. The charging valve of claim 1, wherein: and an energy accumulator is arranged at the second oil inlet.
3. A charging valve mounting structure which characterized in that: the hydraulic filling valve comprises an oil cylinder and the hydraulic filling valve according to claim 1 or 2, wherein the oil cylinder comprises a cylinder body and a piston movably arranged in the cylinder body, the hydraulic filling valve further comprises a valve seat and a fixing screw, the valve seat is fixed on the cylinder body through the fixing screw, a third oil port is arranged on the cylinder body, and the first oil port is communicated with the third oil port.
4. The charging valve mounting structure of claim 3, wherein: and a third oil inlet is also formed in the cylinder body.
5. The charging valve mounting structure of claim 3, wherein: the second oil through port is communicated to the oil tank.
6. A hydraulic machine, characterized in that: comprising the charging valve of claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910376296.XA CN110195726B (en) | 2019-05-07 | 2019-05-07 | Charging valve, charging valve mounting structure and hydraulic machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910376296.XA CN110195726B (en) | 2019-05-07 | 2019-05-07 | Charging valve, charging valve mounting structure and hydraulic machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110195726A CN110195726A (en) | 2019-09-03 |
| CN110195726B true CN110195726B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910376296.XA Active CN110195726B (en) | 2019-05-07 | 2019-05-07 | Charging valve, charging valve mounting structure and hydraulic machine |
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| Country | Link |
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| CN (1) | CN110195726B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953213B (en) * | 2019-12-13 | 2021-07-06 | 辽宁工程技术大学 | Static and dynamic combined loading quick impact hydraulic cylinder |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2311686A1 (en) * | 2009-10-15 | 2011-04-20 | Hyva International B.V. | Tip valve |
| CN201991855U (en) * | 2011-02-15 | 2011-09-28 | 山东泰丰液压股份有限公司 | Hydraulic active prefill valve |
| CN202834230U (en) * | 2012-08-20 | 2013-03-27 | 东莞市神煜机械有限公司 | Prefill valve |
| CN104344017A (en) * | 2014-10-28 | 2015-02-11 | 华中科技大学 | Plane sealing type reversing valve |
| CN107830006A (en) * | 2017-11-29 | 2018-03-23 | 北京理工大学 | A kind of electro-hydraulic inverse-proportion pressure reducing valve |
| DE102017108186A1 (en) * | 2017-04-18 | 2018-10-18 | Gardner Denver Deutschland Gmbh | Mixing valve arrangement for a hydraulic system, as well as oil cooling system and compressor system with this |
| CN208417121U (en) * | 2018-07-05 | 2019-01-22 | 天津智威泰克成形技术有限公司 | A kind of prefill valve |
| CN109296575A (en) * | 2018-11-12 | 2019-02-01 | 温州大学 | A kind of pilot control formula switch valve |
| CN210118301U (en) * | 2019-05-07 | 2020-02-28 | 湖州机床厂有限公司 | Prefill valve, prefill valve mounting structure and hydraulic press |
-
2019
- 2019-05-07 CN CN201910376296.XA patent/CN110195726B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2311686A1 (en) * | 2009-10-15 | 2011-04-20 | Hyva International B.V. | Tip valve |
| CN201991855U (en) * | 2011-02-15 | 2011-09-28 | 山东泰丰液压股份有限公司 | Hydraulic active prefill valve |
| CN202834230U (en) * | 2012-08-20 | 2013-03-27 | 东莞市神煜机械有限公司 | Prefill valve |
| CN104344017A (en) * | 2014-10-28 | 2015-02-11 | 华中科技大学 | Plane sealing type reversing valve |
| DE102017108186A1 (en) * | 2017-04-18 | 2018-10-18 | Gardner Denver Deutschland Gmbh | Mixing valve arrangement for a hydraulic system, as well as oil cooling system and compressor system with this |
| CN107830006A (en) * | 2017-11-29 | 2018-03-23 | 北京理工大学 | A kind of electro-hydraulic inverse-proportion pressure reducing valve |
| CN208417121U (en) * | 2018-07-05 | 2019-01-22 | 天津智威泰克成形技术有限公司 | A kind of prefill valve |
| CN109296575A (en) * | 2018-11-12 | 2019-02-01 | 温州大学 | A kind of pilot control formula switch valve |
| CN210118301U (en) * | 2019-05-07 | 2020-02-28 | 湖州机床厂有限公司 | Prefill valve, prefill valve mounting structure and hydraulic press |
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| Publication number | Publication date |
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| CN110195726A (en) | 2019-09-03 |
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