CN115962176A - Prefill valve and working method thereof - Google Patents
Prefill valve and working method thereof Download PDFInfo
- Publication number
- CN115962176A CN115962176A CN202310057267.3A CN202310057267A CN115962176A CN 115962176 A CN115962176 A CN 115962176A CN 202310057267 A CN202310057267 A CN 202310057267A CN 115962176 A CN115962176 A CN 115962176A
- Authority
- CN
- China
- Prior art keywords
- oil
- valve core
- valve
- oil cylinder
- small
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000003921 oil Substances 0.000 claims description 195
- 239000010720 hydraulic oil Substances 0.000 claims description 30
- 238000007599 discharging Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000005381 potential energy Methods 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 9
- 238000000605 extraction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Landscapes
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a liquid filling valve and a working method thereof, and relates to the technical field of liquid filling valves. The valve comprises a valve body, a large valve core and a small valve core, wherein the valve body is connected with the small valve core in a sliding mode, the large valve core is located at the bottom of the valve body, a valve core nut is arranged at the bottom of the large valve core, a valve sleeve is arranged at the top of the valve body, the small valve core penetrates through the middle of the valve body, one end of the small valve core is embedded in the valve sleeve, a spring is arranged on the outer side of the small valve core, the other end of the small valve core is connected with the large valve core in a sliding mode, a spring cover is arranged at the top end of the small valve core, and the spring cover is provided with a limiting portion and a sleeve. According to the invention, the large cavity is arranged in the valve body, so that the weight of the liquid charging valve body can be reduced, the material consumption is reduced, and the production cost is reduced; the liquid filling valve also comprises a large valve core and a small valve core, so that the large valve core and the cavity can be quickly and flexibly opened and closed, the structure is simple, the practicability is high, and the parts are simple and convenient to manufacture and install.
Description
Technical Field
The invention belongs to the technical field of liquid charging valves, and particularly relates to a liquid charging valve and a working method thereof.
Background
The liquid filling valve is widely applied to machines such as forging machinery, high-speed punches, presses, injection molding machines and the like. In forging and pressing machinery, the oil cylinder of the press can play a role in quickly filling oil and discharging oil. The unloading function can be realized at high pressure and large flow, and the unloading impact is avoided. The charge valve is generally used as a suction/discharge valve between the hydraulic pressure and the tank. When the large-scale press machine rapidly advances, the oil cylinder needs to supplement a large amount of oil, and the oil is automatically absorbed into the oil tank; when the pressure is slowly increased, the oil is prevented from flowing back from the oil cylinder to the oil tank. When the direction is reversed, the oil can be discharged back to the oil tank from the oil cylinder. The liquid filling valve can enable the piston to be filled and discharged quickly under the action of pressure, can also be set with pre-opening pressure, and has reliable sealing performance. The processing is fine, the precision is high, no leakage exists, and the pressure maintaining performance is good. The self-body has a slow-moving valve core, so that the moving sound and vibration can be effectively reduced.
However, the prior liquid charging valve has the following disadvantages when in use:
the existing liquid-filled valve has large volume and weight, is not beneficial to installation, and has low production efficiency, more used materials and high production cost; the speed of oil feeding and oil discharging of the oil cylinder is slow, and the oil cylinder is difficult to adapt to the use scene with high strength and high frequency.
There is therefore a need for improvements in the prior art to address the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a prefill valve and a working method thereof, wherein by improving the combined structure and the appearance of a large valve core and a small valve core, the opening and the closing of a cavity of the large valve core and a cavity of a valve body are realized by utilizing pressure difference in a cylinder and a spring during oil inlet, so that the pressure boosting and the pressure maintaining in the cylinder are realized; the big case is provided with the oil gallery, through opening, closing of big case, little case during the oil extraction, ingenious manufacturing pressure differential, the cavity of quick adjustment big case and valve body is opened, is closed again, and quick oil extraction utilizes the elastic deformation of spring in time to separate hydraulic oil and hydro-cylinder, realizes quick oil extraction.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a liquid charging valve which comprises a valve body, a large valve core and a small valve core, wherein the valve body is connected with the small valve core in a sliding mode, the large valve core is positioned at the bottom of the valve body, a valve core nut is arranged at the bottom of the large valve core, a valve sleeve is arranged at the top of the valve body, and the small valve core penetrates through the middle of the valve body.
Furthermore, one end of the small valve core is nested in the valve sleeve, a spring is arranged on the outer side of the small valve core, and the other end of the small valve core is connected with the large valve core in a sliding mode.
Furthermore, a spring cover is arranged at the top end of the small valve core, the spring cover is provided with a limiting part and a sleeve, the small valve core is fixedly nested in the sleeve, and an elastic sleeve is arranged between the spring cover and the valve sleeve.
Further, be provided with the supporting station on the valve body, the supporting station middle part is provided with the solid fixed ring of spring, the spring is located between solid fixed ring of spring and the spacing portion.
Furthermore, the valve body is provided with an oil duct inlet, an upper sealing ring, a lower sealing ring and a cavity, an inner oil duct is arranged in the valve sleeve, an oil duct outlet is formed in the top of the valve sleeve, a plug is arranged on the side wall of the valve sleeve, and the inner oil duct is communicated with the oil duct inlet.
Furthermore, the valve sleeve is fixedly connected with the valve body through hexagonal screws, and the number of the hexagonal screws is four.
Furthermore, the big valve core is provided with an oil return hole, and hydraulic oil enters the cavity through the oil return hole.
Further, the number of the oil return holes is six.
The invention also provides a working method of the liquid charging valve, which comprises the following steps:
the method comprises the following steps: installing a liquid filling valve body between an upper oil cylinder and a lower oil cylinder, wherein an oil duct inlet is connected with an external adjusting oil cylinder;
step two: in the lower oil cylinder oil supplementing mode, when the hydraulic shaft of the lower oil cylinder moves downwards, negative pressure is formed in the lower oil cylinder;
step three: the pressure of the external adjusting oil cylinder is greater than the pressure in the lower oil cylinder, hydraulic oil enters the cavity of the valve sleeve from the oil passage outlet through the oil passage inlet and the internal oil passage, the hydraulic oil applies pressure to the elastic sleeve, the elastic sleeve descends under external force, and the spring cover is arranged between the elastic sleeve and the small valve element, so that the spring is extruded by the spring cover when the elastic sleeve descends, the spring deforms, elastic potential energy is stored, and the large valve element and the small valve element descend simultaneously;
step four: when the large valve core descends, the lower oil cylinder is communicated with the cavity of the valve body and the upper oil cylinder, the external adjusting oil cylinder stops injecting oil, hydraulic oil of the upper oil cylinder enters the lower oil cylinder, when the space in the lower oil cylinder is filled with the hydraulic oil, the pressure in the cylinder is in a balanced state, the spring is not influenced by external force any more and recovers the original length, the large valve core and the small valve core are driven to ascend, the large valve core blocks the cavity again, the hydraulic oil of the upper oil cylinder and the lower oil cylinder is separated, the lower oil cylinder is enabled to keep generating proper working pressure, and an external device is driven or supported;
step five: in the oil discharging mode of the lower oil cylinder, when the lower oil cylinder needs oil discharging and pressure relief in an oil charging state, oil is injected into the valve sleeve through the oil duct inlet and the inner oil duct by the external adjusting oil cylinder to be pressurized, so that the small valve element moves downwards, a gap is formed between the small valve element and the large valve element, hydraulic oil in the lower oil cylinder enters the cavity through the oil return hole of the large valve element, the pressure in the lower oil cylinder begins to drop, the external adjusting oil cylinder continues to inject oil into the valve sleeve at the moment, so that the small valve element pushes the large valve element to drop, the lower oil cylinder is communicated with the cavity and the upper oil cylinder, and the hydraulic shaft quickly discharges the hydraulic oil in the cylinder;
step six: after the lower oil cylinder finishes oil drainage, the external adjusting oil cylinder stops oil injection at the same time, the small valve core drives the large valve core to restore to the original position under the elastic action of the spring, and the large valve core blocks the cavity again to isolate the upper oil cylinder from the lower oil cylinder.
The invention has the following beneficial effects:
the cavity is arranged in the valve body, the space of the cavity is large, the weight of the liquid filling valve body can be reduced, the installation is convenient, the production efficiency is improved, the material consumption is reduced, the production cost is reduced, hydraulic oil can be injected into or discharged out of the oil cylinder through the cavity in a large amount and quickly, and the liquid filling valve is suitable for high-strength and high-frequency use scenes.
The liquid filling valve also comprises a large valve core and a small valve core, the small valve core is pressurized by utilizing the oil cylinder to generate negative pressure or adjusting the oil cylinder externally, the large valve core and the cavity can be opened and closed quickly and flexibly, the structure is simple, the practicability is high, and the parts are easy and convenient to manufacture and install.
Of course, it is not necessary for any product to practice the invention to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view taken along the direction A in FIG. 1;
FIG. 3 is a disassembled schematic view of the present invention;
FIG. 4 is an oblique view of the present invention;
FIG. 5 is a schematic structural view of a valve body;
FIG. 6 is a schematic structural view of the bullet sleeve;
FIG. 7 is a schematic view of the spring cover;
FIG. 8 is a cross-sectional view of the bottom bracket of the spring cover;
FIG. 9 is a schematic structural view of a large valve core;
FIG. 10 is a cross-sectional view of the central axis of the large valve spool;
FIG. 11 is a schematic view of a combination structure of a large valve core and a small valve core;
FIG. 12 is a sectional view taken along the direction B in FIG. 11;
fig. 13 is a sectional view of the center shaft of the combination structure of the present invention and the cylinder.
The list of components represented by each reference number is as follows:
1-valve body, 101-oil channel inlet, 102-upper sealing ring, 103-lower sealing ring, 104-cavity, 105-supporting table, 10501-spring fixing ring, 2-valve sleeve, 201-plug, 202-inner oil channel, 20201-oil channel outlet, 3-big valve core, 301-oil return hole, 4-small valve core, 5-valve core nut, 6-spring, 7-elastic sleeve, 8-spring cover, 801-limiting part, 802-sleeve, 9-hexagonal screw, 10-upper oil cylinder and 11-lower oil cylinder.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached drawings 1-13, the invention relates to a liquid charging valve, which comprises a valve body 1, a large valve core 3 and a small valve core 4, wherein the valve body 1 is connected with the small valve core 4 in a sliding manner, the large valve core 3 is positioned at the bottom of the valve body 1, a valve core nut 5 is arranged at the bottom of the large valve core 3, a valve sleeve 2 is arranged at the top of the valve body 1, and the small valve core 4 penetrates through the middle of the valve body 1. Specifically, one end of the small valve core 4 is nested in the valve sleeve 2, the outer side of the small valve core is provided with a spring 6, and the other end of the small valve core is connected with the large valve core 3 in a sliding mode. The top end of the small valve core 4 is provided with a spring cover 8, the spring cover 8 is provided with a limiting part 801 and a sleeve 802, the small valve core 4 is fixedly nested in the sleeve 802, and an elastic sleeve 7 is arranged between the spring cover 8 and the valve sleeve 2. When the small valve core 4 is used, the spring 6 can be deformed when the small valve core 4 moves downwards under the action of external force of hydraulic oil, and when the external force is eliminated, the spring 6 can restore to the original state and reversely push the small valve core 4, so that the small valve core 4 is simple in structure and practical.
The valve body 1 is provided with the supporting platform 105, the middle part of the supporting platform 105 is provided with the spring fixing ring 10501, the spring 6 is positioned between the spring fixing ring 10501 and the limiting part 801, the spring 6 is always kept vertical, and the displacement is avoided.
The valve body 1 is provided with an oil passage inlet 101, an upper sealing ring 102, a lower sealing ring 103 and a cavity 104, an inner oil passage 202 is arranged in the valve sleeve 2, an oil passage outlet 20201 is arranged at the top of the valve sleeve, a plug 201 is arranged on the side wall of the valve sleeve, and the inner oil passage 202 is communicated with the oil passage inlet 101. The charging valve body is connected between the upper oil cylinder 10 and the lower oil cylinder 11, and the upper sealing ring 102 and the lower sealing ring 103 can effectively eliminate a gap between the charging valve body and the oil cylinder and prevent hydraulic oil from leaking.
The valve sleeve 2 is fixedly connected with the valve body 1 through the hexagonal screws 9, and the number of the hexagonal screws 9 is four. The valve housing 2 is tightly coupled to the valve body 1.
The big valve core 3 is provided with an oil return hole 301, and hydraulic oil enters the cavity 104 through the oil return hole 301. The number of the oil return holes 301 is six. The oil return holes 301 are uniformly distributed on the outer side of the large valve core 3, when hydraulic oil is released through the oil return holes 301, the oil inlet amount can be increased, and the reaction is quicker and more efficient.
The invention also provides a working method of the prefill valve, which comprises the following steps:
the method comprises the following steps: the liquid filling valve body is arranged between an upper oil cylinder 10 and a lower oil cylinder 11, and an oil duct inlet 101 is connected with an external adjusting oil cylinder;
step two: in the oil supplementing mode of the lower oil cylinder 11, when the hydraulic shaft 1101 of the lower oil cylinder 11 moves downwards, negative pressure is formed in the lower oil cylinder 11;
step three: the pressure of the external adjusting oil cylinder is greater than the pressure in the lower oil cylinder 11, hydraulic oil enters the cavity of the valve sleeve 2 from the oil passage outlet 20201 through the oil passage inlet 101 and the inner oil passage 202, the hydraulic oil presses the elastic sleeve 7, the elastic sleeve 7 descends under the action of external force, and as the spring cover 8 is arranged between the elastic sleeve 7 and the small valve core 4, the spring 6 is extruded by the spring cover 8 when the elastic sleeve 7 descends, the spring 6 deforms, elastic potential energy is stored, and the large valve core 3 and the small valve core 4 descend simultaneously;
step four: when the large valve core 3 descends, the lower oil cylinder 11 is communicated with the cavity 104 of the valve body 1 and the upper oil cylinder 10, the external adjusting oil cylinder stops injecting oil, hydraulic oil of the upper oil cylinder 10 enters the lower oil cylinder 11, after the space in the lower oil cylinder 11 is filled with the hydraulic oil, the pressure in the cylinder is in a balanced state, the spring 6 is not influenced by external force to recover the original length, the large valve core 3 and the small valve core 4 are driven to ascend, the large valve core 3 blocks the cavity 104 again, the hydraulic oil of the upper oil cylinder 10 and the lower oil cylinder 11 is separated, the lower oil cylinder 11 is enabled to keep generating proper working pressure, and an external device is driven or supported;
step five: when the lower oil cylinder 11 needs oil discharge and pressure relief in an oil charging state, oil is injected into the valve sleeve 2 through the external adjusting oil cylinder via the oil passage inlet 101 and the inner oil passage 202 to pressurize, so that the small valve core 4 moves downwards, a gap is generated between the small valve core 4 and the large valve core 3, hydraulic oil in the lower oil cylinder 11 enters the cavity 104 through the oil return hole 301 of the large valve core 3, the pressure in the lower oil cylinder 11 begins to drop, at the moment, the external adjusting oil cylinder continues to inject oil into the valve sleeve 2, so that the small valve core 4 pushes the large valve core 3 to drop, the lower oil cylinder 11 is communicated with the cavity 104 and the upper oil cylinder 10, and the hydraulic shaft 1101 quickly discharges the hydraulic oil in the cylinder;
step six: after the lower oil cylinder 11 finishes oil drainage, the external adjusting oil cylinder stops oil injection at the same time, the small valve core 4 drives the large valve core 3 to restore to the original position under the elastic action of the spring 6, and the large valve core 3 blocks the cavity 104 again to isolate the upper oil cylinder 10 from the lower oil cylinder 11.
The cavity 104 is arranged in the valve body 1, the space of the cavity 104 is large, the weight of the liquid filling valve body can be reduced, the installation is convenient, the production efficiency is improved, the material consumption is reduced, the production cost is reduced, hydraulic oil can be injected into or discharged from the oil cylinder through the cavity in a large amount and quickly, and the liquid filling valve is suitable for high-strength and high-frequency use scenes.
The liquid filling valve also comprises a small valve core 4 and a large valve core 3, the small valve core 4 is pressurized by utilizing the oil cylinder to generate negative pressure or adjusting the oil cylinder externally, the large valve core 3 and the cavity 104 can be opened and closed quickly and flexibly, the structure is simple, the practicability is high, and the parts are easy and convenient to manufacture and install.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above are only preferred embodiments of the present invention, and the present invention is not limited thereto, and any modifications to the technical solutions described in the above embodiments, and equivalents of some technical features are included in the scope of the present invention.
Claims (9)
1. The liquid charging valve comprises a valve body (1), a large valve core (3) and a small valve core (4), wherein the valve body (1) is connected with the small valve core (4) in a sliding mode, the large valve core (3) is located at the bottom of the valve body (1), a valve core nut (5) is arranged at the bottom of the large valve core (3), a valve sleeve (2) is arranged at the top of the valve body (1), and the small valve core (4) penetrates through the middle of the valve body (1).
2. The prefill valve according to claim 1, wherein one end of the small valve core (4) is nested in the valve housing (2), a spring (6) is arranged on the outer side, and the other end is slidably connected with the large valve core (3).
3. The prefill valve according to claim 2, wherein a spring cover (8) is disposed on the top end of the small valve element (4), the spring cover (8) is provided with a limiting portion (801) and a sleeve (802), the small valve element (4) is fixedly nested in the sleeve (802), and an elastic sleeve (7) is disposed between the spring cover (8) and the valve housing (2).
4. A charging valve according to claim 3, characterized in that the valve body (1) is provided with a support platform (105), the support platform (105) is provided with a spring fixing ring (10501) in the middle, and the spring (6) is located between the spring fixing ring (10501) and the limiting part (801).
5. The prefill valve according to claim 4, wherein the valve body (1) is provided with an oil passage inlet (101), an upper seal ring (102), a lower seal ring (103), and a cavity (104), an inner oil passage (202) is provided in the valve housing (2), an oil passage outlet (20201) is provided at the top, a plug (201) is provided on the side wall, and the inner oil passage (202) is communicated with the oil passage inlet (101).
6. A charging valve according to claim 5, characterized in that the valve housing (2) is fixedly connected to the valve body (1) by means of hexagonal screws (9), the number of said hexagonal screws (9) being four.
7. A filling valve according to claim 6, wherein the big valve spool (3) is provided with an oil return hole (301), and hydraulic oil enters the cavity (104) through the oil return hole (301).
8. A filling valve according to claim 7, wherein the number of said oil return holes (301) is six.
9. The method of operating a charging valve according to any one of claims 5 to 8, characterized in that it comprises the following steps:
the method comprises the following steps: the liquid filling valve body is arranged between an upper oil cylinder (10) and a lower oil cylinder (11), and the oil duct inlet (101) is connected with an external adjusting oil cylinder;
step two: the oil supplementing mode of the lower oil cylinder (11) is characterized in that when a hydraulic shaft (1101) of the lower oil cylinder (11) moves downwards, negative pressure is formed in the lower oil cylinder (11);
step three: the pressure of an external adjusting oil cylinder is larger than the pressure in a lower oil cylinder (11), hydraulic oil enters a cavity of the valve sleeve (2) from the oil passage outlet (20201) through the oil passage inlet (101) and the internal oil passage (202), the hydraulic oil presses the elastic sleeve (7), the elastic sleeve (7) descends under the action of external force, the spring cover (8) is arranged between the elastic sleeve (7) and the small valve core (4), the spring (6) is extruded by the spring cover (8) when the elastic sleeve (7) descends, the spring (6) deforms to store elastic potential energy, and the large valve core (3) and the small valve core (4) descend simultaneously;
step four: when the big valve core (3) descends, the lower oil cylinder (11) is communicated with the cavity (104) of the valve body (1) and the upper oil cylinder (10), the external adjusting oil cylinder stops oiling, hydraulic oil of the upper oil cylinder (10) enters the lower oil cylinder (11), when the space in the lower oil cylinder (11) is filled with the hydraulic oil, the pressure in the cylinder is in a balance state, the spring (6) is not influenced by external force to recover the original length, the big valve core (3) and the small valve core (4) are driven to ascend, the big valve core (3) blocks the cavity (104) again, the hydraulic oil of the upper oil cylinder (10) and the lower oil cylinder (11) is separated, the lower oil cylinder (11) keeps generating proper working pressure, and an external device is driven or supported;
step five: in the oil discharging mode of the lower oil cylinder (11), when the lower oil cylinder (11) is in an oil charging state and needs to discharge oil and relieve pressure, oil is injected into the valve sleeve (2) through the oil duct inlet (101) and the inner oil duct (202) by an external adjusting oil cylinder to pressurize, so that the small valve core (4) moves downwards, a gap is generated between the small valve core (4) and the large valve core (3), hydraulic oil in the lower oil cylinder (11) enters the cavity (104) through the oil return hole (301) of the large valve core (3), the pressure in the lower oil cylinder (11) begins to drop, at the moment, the external adjusting oil cylinder continues to inject oil into the valve sleeve (2), so that the small valve core (4) pushes the large valve core (3) to drop, the lower oil cylinder (11) is communicated with the cavity (104) and the upper oil cylinder (10), and the hydraulic shaft (1101) quickly discharges the hydraulic oil in the cylinder;
step six: after the lower oil cylinder (11) finishes oil discharge, the external adjusting oil cylinder stops oil injection at the same time, the small valve core (4) drives the large valve core (3) to recover to the original position under the elastic action of the spring (6), and the large valve core (3) blocks the cavity (104) again to isolate the upper oil cylinder (10) from the lower oil cylinder (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310057267.3A CN115962176A (en) | 2023-01-18 | 2023-01-18 | Prefill valve and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310057267.3A CN115962176A (en) | 2023-01-18 | 2023-01-18 | Prefill valve and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115962176A true CN115962176A (en) | 2023-04-14 |
Family
ID=87354222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310057267.3A Pending CN115962176A (en) | 2023-01-18 | 2023-01-18 | Prefill valve and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115962176A (en) |
-
2023
- 2023-01-18 CN CN202310057267.3A patent/CN115962176A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100414090C (en) | Control valve for a fuel injector that contains a pressure intensifier | |
| CN108035926B (en) | A kind of application method of multi-cylinder linkage hydraulic system of hydraulic machine | |
| CN102364120A (en) | Hydraulic control system for piston type energy accumulator | |
| CN109982789A (en) | Hydraulic casting unit | |
| CN113417900B (en) | Integrated high-pressure large-flow proportional overflow type unloading valve | |
| CN115962176A (en) | Prefill valve and working method thereof | |
| CN1011525B (en) | Fuel injection pump for internal combustion engine | |
| CN201318405Y (en) | Hydraulic pressure clutch total pump | |
| CN217501888U (en) | Reciprocating fluid circulation booster pump | |
| CN219622975U (en) | Novel liquid filling valve | |
| CN212177557U (en) | Continuous pressurizing oil cylinder | |
| CN218934886U (en) | Hydraulic press hydro-cylinder liquid filling valve | |
| WO2023206881A1 (en) | Dual-fuel pressurized injection device | |
| CN109973370A (en) | A kind of hydraulic-driven membrane compressor | |
| CN214331054U (en) | Novel die assembly oil cylinder for oil pressure machinery | |
| KR200398611Y1 (en) | pressure of a oil pressure | |
| CN209067088U (en) | A kind of hydraulic crushing strike machine core and hydraulic breaking hammer | |
| CN102454567A (en) | Low-noise and large-power hydraulic plunger pump | |
| CN203488477U (en) | Second-level synchronous hydraulic cylinder | |
| CN108189349B (en) | Rear template assembly, hydraulic mould closing mechanism of vertical type injection machine and vertical type injection machine | |
| KR101395622B1 (en) | piston type accumulator for shock absorber | |
| CN210755066U (en) | High-speed pressure boost system of die-casting | |
| CN208431228U (en) | A kind of hydraulic press composite hydraulic cylinder structure | |
| CN116658470B (en) | Supercharger and self-supercharging oil cylinder | |
| CN108443263A (en) | A kind of hydraulic cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20230414 |
|
| WD01 | Invention patent application deemed withdrawn after publication |