CN103883743A - Extrusion machine liquid charging valve and extrusion machine with same - Google Patents
Extrusion machine liquid charging valve and extrusion machine with same Download PDFInfo
- Publication number
- CN103883743A CN103883743A CN201410129859.2A CN201410129859A CN103883743A CN 103883743 A CN103883743 A CN 103883743A CN 201410129859 A CN201410129859 A CN 201410129859A CN 103883743 A CN103883743 A CN 103883743A
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- Prior art keywords
- extrusion press
- valve
- hydraulic cylinder
- valve body
- oil hydraulic
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Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 53
- 239000007788 liquid Substances 0.000 title abstract 5
- 239000002828 fuel tank Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/165—Control arrangements for fluid-driven presses for pneumatically-hydraulically driven presses
Abstract
The invention provides an extrusion machine liquid charging valve which comprises a valve body, an oil return pipeline and a valve element arranged in the valve body. The extrusion machine liquid charging valve further comprises a rear hydraulic cylinder fixed to the valve body, a hydraulic piston is arranged in the rear hydraulic cylinder, and a cavity inside the rear hydraulic cylinder is divided into a rod cavity and a rodless cavity by the piston. The front end of the valve element stretches out of the valve body, and the rear end of the valve element is connected with the piston. The rear hydraulic cylinder can drive the valve element to advance or retreat. An oil cylinder controls the extrusion machine liquid charging valve to be opened and closed, and the extrusion machine liquid charging valve is fast, reliable and compact in structure, and is specifically suitable for a horizontal extrusion machine.
Description
Technical field
The present invention relates to extrusion press master cylinder control technique, be specially a kind of extrusion press liquid-filling valve, the invention still further relates to the extrusion press master cylinder and the extrusion press that comprise this liquid-filling valve.
Background technique
In extrusion press, in order to improve no-load speed and the opening speed of hydraulic press, the large latus rectum liquid-filling valve of extensive use is realized fast large flow topping up and the discharge opeing to hydraulic press master cylinder.In the time that master cylinder pressurizes, liquid-filling valve also plays the effect that separates fuel tank and master cylinder.Along with the development of extrusion press, improve the manufacturing efficiency of extruder appts operation, shorten dead cycle time, just become a main target of extrusion press design.
Application number a kind of liquid-filling valve that has been 200510042220.1 Patent Application Publication, it is opened by plunger self-priming, closes by spring, the long-term tired or reciprocal process causing that uses of spring is stuck, all can make equipment produce fault, and because spring is in device interior, dismantle, keep in repair more difficult.Therefore, this kind of on-off mode exists great uncertainty, reduced to a certain extent the manufacturing efficiency of extruder appts.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of extrusion press liquid-filling valve, comprise valve body, one return line and be arranged at the spool in described valve body, wherein, also comprise: one is fixed on the rear oil hydraulic cylinder of described valve body, in described rear oil hydraulic cylinder, is provided with a hydraulic piston, and the cavity in described rear oil hydraulic cylinder is divided into rod chamber and rodless cavity by described piston; The front end of described spool stretches out described valve body, and rear end connects described piston; Described rear oil hydraulic cylinder can drive described spool advance or retreat.
According to an embodiment of the present invention, also comprise a solenoid valve, described solenoid valve is connected with described rod chamber, described rodless cavity respectively, and the oil circuit of described solenoid valve is communicated to described valve body.
According to another embodiment of the present invention, described rear oil hydraulic cylinder is cylinder, and one end is communicated with described valve body, and the other end is fixed with a cylinder cap, and described solenoid valve is arranged on described cylinder cap.
According to another embodiment of the present invention, on the sidewall of described rear oil hydraulic cylinder, offer T shape spill port.
According to another embodiment of the present invention, on described rear oil hydraulic cylinder, be provided with pressure measuring tie-in and nameplate.
The present invention further provides a kind of extrusion press with above-mentioned any one extrusion press liquid-filling valve, comprise extrusion press master cylinder, the valve body being connected with described extrusion press master cylinder, one return line and be arranged at the spool in described valve body, described liquid-filling valve is connected in described extrusion press master cylinder, the corresponding described valve body of described extrusion press master cylinder arranges a note outage, described valve body can be communicated with described extrusion press master cylinder by described note outage, described in described spool control, noting outage opens or closes, wherein, also comprise: one is fixed on the rear oil hydraulic cylinder of described valve body, in described rear oil hydraulic cylinder, be provided with a hydraulic piston, the cavity in described rear oil hydraulic cylinder is divided into rod chamber and rodless cavity by described piston, the front end of described spool is arranged at described note outage one side actively, and rear end connects described piston, advance or retreat by spool described in described rear Driven by Hydraulic Cylinder, open or close to control described note outage.
According to an embodiment of the present invention, in described note outage, a valve seat is installed, outside at described valve seat and described note outage is provided with the first flange, the center hole of described the first flange is ladder hole, there are left and right two positioning tables, described valve seat is fixed on the right positioning table of described the first flange, and described the first flange is fixed on the outside of described extrusion press master cylinder rear end, in the left positioning table of described the first flange, is provided with a guide holder; There is the second flange in the outer installment of described the first flange and described guide holder.
According to another embodiment of the present invention, described valve body is three-way pipe, has the first port, the second port and the 3rd port, and described the first port is communicated with described extrusion press master cylinder, and described the second port is communicated with described rear oil hydraulic cylinder, and described the 3rd port is communicated with fuel tank.
According to another embodiment of the present invention, described spool has head, bar portion and afterbody, described head stretches into described note outage from described the first port, described bar portion is arranged at described guide holder and the described bearing in described valve body, described afterbody stretches into described rear oil hydraulic cylinder from described the second port, and is connected with described piston thread.
According to another embodiment of the present invention, described guide holder comprises inner ring, outer ring and four gussets, and described gusset is arranged between described inner ring and described outer ring, and described spool is arranged in described inner ring.
The opening and closing of extrusion press liquid-filling valve of the present invention realize by oil cylinder, and fast, reliably, compact structure, is specially adapted to horizontal extruder.Extrusion press liquid-filling valve of the present invention, by being connected in the return line oil return of valve body, the setting of having saved pipeline, and the movement of the rear oil hydraulic cylinder control spool of utilization, the setting of having omitted pilot valve.
Accompanying drawing explanation
Fig. 1 is the main sectional view of extrusion press liquid-filling valve of the present invention;
Fig. 2 is the left view of extrusion press liquid-filling valve of the present invention;
Fig. 3 is the left view of the guide holder of extrusion press liquid-filling valve of the present invention;
Fig. 4 is the schematic diagram of extrusion press liquid-filling valve of the present invention.
Wherein, description of reference numerals is as follows:
1, spool 2, valve seat 3, I sunk screw
4, II seal ring 5, back-up ring 6, I seal ring
7, the first flange 8, nut 9, II screw
10, guide holder 10a, III seal ring 11, head
12, bar portion 13, afterbody 14, valve body
15, IV screw 16, bearing 17, IV seal ring
18, the second combination seal 19, the second guide ring 20, rear oil hydraulic cylinder
21, plug screw 22, V seal ring 23, piston
24, VI seal ring 26, the first combination seal 27, the first guide ring
30, IV screw 31, cylinder cap 32, solenoid valve
32, solenoid valve 33, double-screw bolt 34, nut
35, the first pipe joint 61, pressure measuring tie-in 62, nameplate
70, return line 71, the second pipe joint 72, three-way union
73, ball valve 74, the 3rd pipe joint 75, one-way valve
76, steel pipe 81, compensator 82, the 4th flange
92, master cylinder 101, inner ring 102, outer ring
103, gusset 104, guidance tape 105, III sunk screw
140, the second flange 141, the first port 142, the second port
143, the 3rd port one 44, three-flange 145, end cap
201, spill port 921, high-pressure oil pipe 922, note outage
A1, rodless cavity B1, rod chamber P1, high voltage control oil pipe line
T1, low-pressure oil return pipe road D, electromagnet
Embodiment
The exemplary embodiments that embodies feature & benefits of the present invention will describe in detail in the following description.Be understood that the present invention can have various variations in different embodiments, it neither departs from the scope of the present invention, and explanation wherein and to be shown in be the use when explaining in essence, but not in order to limit the present invention.
As shown in Figure 1, extrusion press liquid-filling valve of the present invention comprises spool 1, valve body 14, rear oil hydraulic cylinder 20, solenoid valve 32 and return line 70.
Extrusion press master cylinder 92 is tubular, is provided with plunger 91 in the inner space of master cylinder 92, offers respectively a high-pressure oil pipe 921 and a note outage 922 on the ear end face of master cylinder 92.Note outage 922 can be positioned at the center of master cylinder 92 ear end faces, is preferably a shoulder hole, is formed with a positioning table in its left part.High-pressure oil pipe 921 can be positioned at the ear end face of master cylinder 92 and the connecting part of side, and the center line center line better and note outage 922 of high-pressure oil pipe 921 has the angle of one 45 °.
In the positioning table of note outage 922, valve seat 2 is installed, the center hole that the first flange 7, the first flanges 7 are installed in the outside of valve seat 2 and note outage 922 can be ladder hole, has left and right two positioning tables.Valve seat 2 is fixed on the right positioning table of the first flange 7 by multiple I sunk screws 3, the first flange 7 is fixed on the outside of master cylinder 92 rear ends by many groups nut 8 and II screw 9.Between valve seat 2 and the first flange 7, be provided with I seal ring 6, between valve seat 2 and master cylinder 92, be provided with II seal ring 4 and back-up ring 5.
As shown in Figure 1,3, in the left positioning table of the first flange 7, be provided with guide holder 10, be anchored on the first flange 7 by multiple III sunk screws 105, guide holder 10 is cast member, comprise that inner ring 101, outer ring 102 and 103, four gusset 103 compartment of terrains of gusset are connected between inner ring 101 and outer ring 102.
There is the second flange 140 in the outer installment of the first flange 7 and guide holder 10, be anchored on the first flange 7 by multiple IV screws 15.Between guide holder 10 outer circumferential faces and the first flange 7, guide holder 10 outer circumferential faces and the second flange 140, be respectively arranged with two III seal ring 10a.
Valve body 14 is a three-way pipe, has the first port 141, with the second port one 42 of the first port 141 opposite directions, and the 3rd perpendicular port one 43 of first and second port.Wherein, the first port 141 is welded in the equal diameters of internal diameter and second flange 140 center holes of the second flange 140, the first ports 141.
Be welded with three-flange 144, the three port ones 43 at the 3rd port one 43 and be communicated with compensator 81 by three-flange 144, compensator 81 is communicated with fuel tank by the 4th flange 82.Compensator 81 is an elastomer connector, for the vibrations of master cylinder 92 and liquid-filling valve and fuel tank are isolated.
Be provided with the end cap 145 that covers the second port one 42 completely at the second port one 42, offer a shoulder hole at end cap 145 center, in this shoulder hole, be provided with bearing 16, on bearing 16, offer one with the through hole of end cap 145 shoulder hole identical central lines.The outside of end cap 145 and bearing 16 is provided with rear oil hydraulic cylinder 20 cylindraceous, between bearing 16 and end cap 145, rear oil hydraulic cylinder 20, is equipped with IV seal ring 17.
On the sidewall of rear oil hydraulic cylinder 20, offer T shape spill port 201, its external port is by plug screw 21 shutoff.Be provided with the cylinder cap 31 of oil hydraulic cylinder 20 ends after covering in the outside of rear oil hydraulic cylinder 20, the vertical section of cylinder cap 31 be square, fastening by double-screw bolt 33, nut 34, between rear oil hydraulic cylinder 20 and cylinder cap 31, is provided with V seal ring 22.
In the cavity forming at cylinder cap 31, rear oil hydraulic cylinder 20 and bearing 16, be provided with piston 23, on piston 23, offer the tapped hole with the through hole identical central line of the shoulder hole of end cap 145, bearing 16.This cavity is divided into rodless cavity A1 and rod chamber B1 by piston 23.Between rear oil hydraulic cylinder 20 and piston 23, be provided with the first combination seal 26 and two group of first guide ring 27, wherein, the first combination seal 26 is OMK-MR combination seal, is made up of PTFE rectangular cross-section slip ring and a circle of the O shape as preload element, and the first guide ring 27 is KB guide ring.
As shown in Figures 1 to 3, the top of cylinder cap 31 is provided with solenoid valve 32, on two relative sides of cylinder cap 31, is provided with pressure measuring tie-in 61 and nameplate 62, is also provided with the first pipe joint 35 on cylinder cap 31.
Spool 1 is forging, comprises head 11, bar portion 12 and afterbody 13.Head 11 is positioned at note outage 922, and the diameter of its vertical section is reduced gradually by intermediate portion to two ends.Bar portion 12 is directed to respectively seat 10, bearing 16 is supported in valve body 14, between the inner ring 101 of guide holder 10 and bar portion 12, be provided with four groups of guidance tapes 104, guidance tape 104 is SF guidance tape, the second combination seal 18 and two group of second guide ring 19 are installed between bearing 16 and bar portion 12, the second combination seal 18 is made up of PTFE odd-shaped cross section slip ring and a circle of the O shape as preload element, and the second guide ring 19 is SB guide ring.Afterbody 13 is threadedly connected to the tapped hole of piston 23, VI seal ring 24, two back-up rings is installed between afterbody 13 and piston 23 and avoids afterbody 13 and the IV screw 30 of relative movement occurs piston 23.
The bottom of cylinder cap 31 is also communicated with return line 70, and return line 70 is made up of the second pipe joint 71, steel pipe 76, one-way valve 75, three-way union 72, ball valve 73 and the 3rd pipe joint 74.One end of three-way union 72 is communicated with cylinder cap 31 by steel pipe 76, and the other end is communicated with valve body 14, the three ends and is provided with ball valve 73 and the 3rd pipe joint 74, and when work, ball valve 73 is in closed condition.
As shown in Fig. 1,4, in cylinder cap 31, offer four ducts, the A mouth of oil hydraulic cylinder 20 rodless cavity A1 and solenoid valve 32 after a connection, pipeline intermediate connection pressure measuring tie-in 61, has nameplate 62; The B mouth of oil hydraulic cylinder 20 rod chamber B1 and solenoid valve 32 after Article 2 is communicated with, pipeline intermediate connection pressure measuring tie-in 61, has nameplate 62; Article 3 is communicated with the first pipe joint 35(high voltage control oil pipe line P1) and the P mouth of solenoid valve 32; Article 4 is communicated with the second pipe joint 71(low-pressure oil return pipe road T1) and the T mouth of solenoid valve 32.
After controlling high voltage control oil pipe line P1, the low-pressure oil return pipe road T1 of oil hydraulic cylinder 20 be communicated with by solenoid valve 32 after oil hydraulic cylinder 20 rod chamber B1 and rodless cavity A1, solenoid valve 32 can controlledly be positioned at cut-off position, forward position and reverse position.When solenoid valve 32 is positioned at forward position, high voltage control oil pipe line P1 is communicated to rodless cavity A1, and rod chamber B1 is communicated to low-pressure oil return pipe road T1, and at this moment, rear oil hydraulic cylinder 20 promotes spool 1 and moves forward.When solenoid valve 32 is positioned at reverse position, high voltage control oil pipe line P1 is communicated to rod chamber, and rodless cavity is communicated to low-pressure oil return pipe road T1, and at this moment, rear oil hydraulic cylinder 20 pulls spool 1 to move backward.When solenoid valve 32 is positioned at cut-off position, all oil circuits are closed, and spool 1 remains on a position.
When work, the electromagnet D dead electricity of solenoid valve 32, high voltage control oil pipe line P1 leads to rodless cavity A1, and spool 1 travels forward, and head 11 separates with valve seat 2, and fuel tank is communicated with master cylinder 92, fast large flow topping up and discharge opeing.
After topping up finishes, the electromagnet D of solenoid valve 32 obtains electric, and high voltage control oil pipe line P1 leads to rod chamber B1, and spool 1 moves backward, and head 11 is fitted with valve seat 2, and fuel tank and master cylinder 92 are closed, and master cylinder 92 high pressure oil pipelines enter master cylinder 92 by high-pressure oil pipe 921, extruding.
Extrusion press liquid-filling valve of the present invention, by being connected in the return line oil return of valve body, the setting of having saved pipeline, and the movement of the rear oil hydraulic cylinder control spool of utilization, the setting of having omitted pilot valve.
Although described the present invention with reference to exemplary embodiments, should be appreciated that term used is explanation and exemplary and nonrestrictive term.Because can specifically implementing in a variety of forms, the present invention do not depart from spirit or the essence of invention, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in the claim of enclosing, therefore fall into whole variations in claim or its equivalent scope and remodeling and all should be the claim of enclosing and contain.
Claims (10)
1. an extrusion press liquid-filling valve, comprises valve body, and a return line and be arranged at the spool in described valve body is characterized in that, also comprises:
One is fixed on the rear oil hydraulic cylinder of described valve body, in described rear oil hydraulic cylinder, is provided with a hydraulic piston, and the cavity in described rear oil hydraulic cylinder is divided into rod chamber and rodless cavity by described piston;
The front end of described spool stretches out described valve body, and rear end connects described piston;
Described rear oil hydraulic cylinder can drive described spool advance or retreat.
2. according to the extrusion press liquid-filling valve of claim 1, it is characterized in that, also comprise a solenoid valve, described solenoid valve is connected with described rod chamber, described rodless cavity respectively, and the oil circuit of described solenoid valve is communicated to described valve body.
3. according to the extrusion press liquid-filling valve of claim 2, it is characterized in that, described rear oil hydraulic cylinder is cylinder, and one end is communicated with described valve body, and the other end is fixed with a cylinder cap, and described solenoid valve is arranged on described cylinder cap.
4. according to the extrusion press liquid-filling valve of claim 3, it is characterized in that, on the sidewall of described rear oil hydraulic cylinder, offer T shape spill port.
5. according to the extrusion press liquid-filling valve of claim 3, it is characterized in that, on described rear oil hydraulic cylinder, be provided with pressure measuring tie-in and nameplate.
6. one kind has the extrusion press of the extrusion press liquid-filling valve of claim 1 to 5 any one, the valve body that comprises extrusion press master cylinder, is connected with described extrusion press master cylinder, one return line and be arranged at the spool in described valve body, described liquid-filling valve is connected in described extrusion press master cylinder, the corresponding described valve body of described extrusion press master cylinder arranges a note outage, described valve body can be communicated with described extrusion press master cylinder by described note outage, described in described spool control, noting outage opens or closes, it is characterized in that, also comprise:
One is fixed on the rear oil hydraulic cylinder of described valve body, in described rear oil hydraulic cylinder, is provided with a hydraulic piston, and the cavity in described rear oil hydraulic cylinder is divided into rod chamber and rodless cavity by described piston;
The front end of described spool is arranged at described note outage one side actively, and rear end connects described piston;
Advance or retreat by spool described in described rear Driven by Hydraulic Cylinder, open or close to control described note outage.
7. according to the extrusion press of claim 6, it is characterized in that, in described note outage, a valve seat is installed, outside at described valve seat and described note outage is provided with the first flange, the center hole of described the first flange is ladder hole, has left and right two positioning tables, and described valve seat is fixed on the right positioning table of described the first flange, described the first flange is fixed on the outside of described extrusion press master cylinder rear end, in the left positioning table of described the first flange, is provided with a guide holder; There is the second flange in the outer installment of described the first flange and described guide holder.
8. according to the extrusion press liquid-filling valve of claim 7, it is characterized in that, described valve body is three-way pipe, there is the first port, the second port and the 3rd port, described the first port is communicated with described extrusion press master cylinder, and described the second port is communicated with described rear oil hydraulic cylinder, and described the 3rd port is communicated with fuel tank.
9. extrusion press liquid-filling valve according to Claim 8, it is characterized in that, described spool has head, bar portion and afterbody, described head stretches into described note outage from described the first port, described bar portion is arranged at described guide holder and the described bearing in described valve body, described afterbody stretches into described rear oil hydraulic cylinder from described the second port, and is connected with described piston thread.
10. according to the extrusion press liquid-filling valve of claim 9, it is characterized in that, described guide holder comprises inner ring, outer ring and four gussets, and described gusset is arranged between described inner ring and described outer ring, and described spool is arranged in described inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129859.2A CN103883743B (en) | 2014-04-01 | 2014-04-01 | Extrusion press liquid-filling valve and comprise the extrusion press of this liquid-filling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129859.2A CN103883743B (en) | 2014-04-01 | 2014-04-01 | Extrusion press liquid-filling valve and comprise the extrusion press of this liquid-filling valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103883743A true CN103883743A (en) | 2014-06-25 |
| CN103883743B CN103883743B (en) | 2016-04-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410129859.2A Expired - Fee Related CN103883743B (en) | 2014-04-01 | 2014-04-01 | Extrusion press liquid-filling valve and comprise the extrusion press of this liquid-filling valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103883743B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937627A (en) * | 2016-06-24 | 2016-09-14 | 海天塑机集团有限公司 | Hydraulic control one-way connector of two-stage squeezing machine |
| WO2021000428A1 (en) * | 2019-07-01 | 2021-01-07 | 梁润明 | Profile extruder with compact type closed pressurization hydraulic system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4015819A (en) * | 1974-09-05 | 1977-04-05 | Greer Hydraulics, Inc. | Gas charging value for accumulator |
| CN2437891Y (en) * | 2000-08-22 | 2001-07-04 | 阴振生 | Liquid filling valve with lead type unload valve |
| DE10257888A1 (en) * | 2002-12-11 | 2004-06-24 | Bosch Rexroth Ag | Filler valve, e.g. pilot-controlled check valve for hydraulic presses has movement measuring device with measuring rod, connected to valve cone, to determine position and measure cone stroke |
| CN101251194A (en) * | 2007-09-19 | 2008-08-27 | 福建海源自动化机械股份有限公司 | Liquid filling valve for hydraulic system of press |
| CN201110289Y (en) * | 2007-10-23 | 2008-09-03 | 山东泰丰液压设备有限公司 | Overlapping type liquid filling valve with beforehand valve-removing in valve core |
| CN201543665U (en) * | 2009-08-11 | 2010-08-11 | 青岛宏奥铜管有限公司 | Hollow extruder |
| CN202284649U (en) * | 2011-10-24 | 2012-06-27 | 广东捷成工机械有限公司 | Replenishing valve of tile hydraulic press |
| CN202946469U (en) * | 2012-12-08 | 2013-05-22 | 宁波佳比佳工贸有限公司 | Vibration attenuating and silencing prefill valve |
-
2014
- 2014-04-01 CN CN201410129859.2A patent/CN103883743B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4015819A (en) * | 1974-09-05 | 1977-04-05 | Greer Hydraulics, Inc. | Gas charging value for accumulator |
| CN2437891Y (en) * | 2000-08-22 | 2001-07-04 | 阴振生 | Liquid filling valve with lead type unload valve |
| DE10257888A1 (en) * | 2002-12-11 | 2004-06-24 | Bosch Rexroth Ag | Filler valve, e.g. pilot-controlled check valve for hydraulic presses has movement measuring device with measuring rod, connected to valve cone, to determine position and measure cone stroke |
| CN101251194A (en) * | 2007-09-19 | 2008-08-27 | 福建海源自动化机械股份有限公司 | Liquid filling valve for hydraulic system of press |
| CN201110289Y (en) * | 2007-10-23 | 2008-09-03 | 山东泰丰液压设备有限公司 | Overlapping type liquid filling valve with beforehand valve-removing in valve core |
| CN201543665U (en) * | 2009-08-11 | 2010-08-11 | 青岛宏奥铜管有限公司 | Hollow extruder |
| CN202284649U (en) * | 2011-10-24 | 2012-06-27 | 广东捷成工机械有限公司 | Replenishing valve of tile hydraulic press |
| CN202946469U (en) * | 2012-12-08 | 2013-05-22 | 宁波佳比佳工贸有限公司 | Vibration attenuating and silencing prefill valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937627A (en) * | 2016-06-24 | 2016-09-14 | 海天塑机集团有限公司 | Hydraulic control one-way connector of two-stage squeezing machine |
| WO2021000428A1 (en) * | 2019-07-01 | 2021-01-07 | 梁润明 | Profile extruder with compact type closed pressurization hydraulic system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103883743B (en) | 2016-04-27 |
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Granted publication date: 20160427 |