CN101691860B - Pressure shut-off valve used for power controller - Google Patents
Pressure shut-off valve used for power controller Download PDFInfo
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- CN101691860B CN101691860B CN2009101526920A CN200910152692A CN101691860B CN 101691860 B CN101691860 B CN 101691860B CN 2009101526920 A CN2009101526920 A CN 2009101526920A CN 200910152692 A CN200910152692 A CN 200910152692A CN 101691860 B CN101691860 B CN 101691860B
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Abstract
The invention discloses a pressure shut-off valve used for a power controller, comprising a valve body and a spool, wherein a first columnar cavity and a second columnar cavity are arranged in the valve body; the valve body is provided with a first oil duct, a second oil duct and a third oil duct which are communicated with the outside of the valve body, wherein the first oil duct, the second oil duct and the third oil duct are respectively communicated with the second columnar cavity; the spool is arranged in the second columnar cavity in a sliding mode; the outer surface of the spool is provided with a first shoulder, a second shoulder and a third shoulder which are in seal fit with the inner wall of the second columnar cavity; the first shoulder and the second shoulder divide the spool into a first rod body, a second rod body and a third rod body, wherein an axial fourth oil duct is arranged in the third rod body, an opening of one end of the fourth oil duct is arranged on the outer surface of the third rod body, and the opening of the other end is arranged on the end surface of the third shoulder. The pressure shut-off valve used for a power controller can introduce high-pressure pressurized oil of the plunger pump outlet into a variable piston, ensuring that the output volume of the plunger pump is quickly lowered so as to save energy and lower consumption.
Description
Technical field
The present invention relates to the power controller in a kind of plunger pump, specifically be used for the pressure shut-off valve of power of plunger pump controller.
Background technique
The patent of invention title: pressure controlled valve, the patent No.: 200410011788.2 provide a kind of can simplify the oil hydraulic circuit that produces pilot pressure, can stably produce pilot pressure and pressure controlled valve that can miniaturization.
This pressure controlled valve has sleeve pipe that is formed with inlet opening, delivery outlet and floss hole and the linear electromagnetic portion that produces thrust.Also have first valve rod and second valve rod, this first valve rod, being set at also can be free to advance or retreat in the described sleeve pipe, transmits described thrust, will be after the incoming pressure process pressure regulation of described inlet opening input, from delivery outlet output delivery pressure; This second valve rod, being set at also can be free to advance or retreat in the described sleeve pipe, and the relative position of change and described first valve rod as feedback pressure, acts on described delivery pressure on first valve rod selectively.
In disclosed other pressure controlled valves of this patent of invention, described linear electromagnetic portion is by being supplied to electric current, producing forming by electric current supply portion and by the movable part that described thrust moved of thrust.Described thrust is directly delivered to second valve rod from described movable part, and by this second valve rod and to second valve rod to the pressure-producing part of described linear electromagnetic portion opposition side pressurization, be delivered to first valve rod.
On described sleeve pipe, be formed with feedback pressure is acted on feedback pressure service portion on first valve rod.And the feedback oil circuit that forms between described first, second valve rod is communicated with described feedback pressure service portion.And then, change the relative position of described first, second valve rod along with changing described thrust by described linear electromagnetic portion, switch the connected state of feedback oil circuit.
In existing plunger pump field, when the outlet pressure oil of plunger pump became high pressure, uncontrollable variable piston reduced to realize the constant function of outlet pressure delivery side of pump pressure rapidly.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned prior art present situation, and provide a kind of pressure shut-off valve that is used for power controller, the high-pressure outlet pressure oil of plunger pump is introduced in the plunger pump variable piston, and the discharge capacity by high-pressure outlet pressure oil controlled variable piston reduces rapidly to realize the constant function of outlet pressure.
The present invention solves the problems of the technologies described above the technological scheme that is adopted: the pressure shut-off valve that is used for power controller, comprise valve body and spool, be provided with first cylinder chamber and second cylinder chamber in the valve body, the shaft axis coincidence of the shaft axis of first cylinder chamber and second cylinder chamber and first cylinder chamber and second cylinder chamber are connected; Valve body is provided with first oil duct, second oil duct and the 3rd oil duct that is connected with the valve body outside, first oil duct, second oil duct and the 3rd oil duct are communicated with second cylinder chamber respectively, and the 3rd inner orifice of first inner orifice of first oil duct of connection place, second inner orifice of second oil duct and the 3rd oil duct axially evenly is spaced along second cylinder chamber respectively; Spool is slidingly arranged in second cylinder chamber, valve core outer surface is shaped on first shoulder and second shoulder that cooperates with the second cylinder chamber inner wall sealing, first shoulder, second shoulder are divided into three sections of first body of rod, second body of rod and the 3rd bodies of rod with spool, leave the gap between first body of rod, second body of rod and the 3rd body of rod and the second cylinder chamber inwall; First end of spool, first spring seat interior with being arranged on first cylinder chamber is connected, and first cylinder chamber is provided with first black box, is fixedly connected with spring assembly between first black box and first spring seat; Second end of spool is provided with the 3rd shoulder that cooperates with the second cylinder chamber inner wall sealing, be provided with the 4th an axial oil duct in the 3rd body of rod between second shoulder and the 3rd shoulder, the 4th oil duct one end opening is arranged on the outer surface of the 3rd body of rod, and the other end opening is arranged on the end face of the 3rd shoulder; The outer end of second cylinder chamber is provided with second black box; Under the spring assembly active force, second end of spool is near second black box, first inner orifice of first oil duct and second inner orifice of second oil duct between first shoulder and second shoulder, first inner orifice and the second inner orifice mutual conduction; When the 3rd oil duct injects high pressure oil by the 4th oil duct between second end of spool and second black box, spool is in the hydraulic pressure lower slider, second inner orifice of second oil duct and the 3rd inner orifice of the 3rd oil duct between second shoulder and the 3rd shoulder, second inner orifice and the 3rd inner orifice mutual conduction.
For optimizing technique scheme, the measure of taking also comprises:
Above-mentioned first black box comprises the adjustment seat that cooperates by thread seal with the first cylinder chamber inwall, and spring assembly is arranged between the adjustment seat and first spring seat.
The first above-mentioned black box can also be to comprise the adjustment seat that cooperates by thread seal with the first cylinder chamber inwall, make interior threaded hole on the adjustment seat, one adjusting screw cooperates by thread seal with interior threaded hole, one end of adjusting screw, second spring seat interior with being arranged on adjustment seat is connected, and the other end of adjusting screw is sealedly connected with locking nut.
Above-mentioned spring assembly comprises outer spring and the inner spring that concentric is provided with.
Above-mentioned first spring seat is shaped on multidiameter shaft, and an end of outer spring and an end of inner spring are enclosed within on the multidiameter shaft respectively.
Above-mentioned second black box comprises bolt and the seal ring that is sealed and matched with the second cylinder chamber inner thread.
Above-mentioned first oil duct, second oil duct and the 3rd oil duct are shaped on internal thread respectively, and the 3rd outer aperture of the first outer aperture of first oil duct, the second outer aperture of second oil duct and the 3rd oil duct is a horn opening.
The third through-hole that is shaped on first through hole that is communicated with first oil duct, second through hole that is communicated with second oil duct on the above-mentioned valve body and is communicated with the 3rd oil duct; The outer aperture of first through hole, second through hole and third through-hole is respectively horn opening.
The above-mentioned second cylinder chamber diameter is 5mm to 9mm, and first shoulder of spool, second shoulder and the 3rd shoulder diameter are corresponding with the second cylinder chamber diameter, and first body of rod of cylindrical valve spool, second body of rod and the 3rd body of rod diameter are 3mm to 7mm.
The diameter of above-mentioned first inner orifice, second inner orifice and the 3rd inner orifice is 3mm to 7mm, first inner orifice and second inner orifice, second inner orifice and the 3rd inner orifice be spaced apart 9mm to 11mm.
Compared with prior art, the pressure shut-off valve that is used for power controller of the present invention is simple in structure, easy for installation, is easy to safeguard; Adopt mechanical transmission to switch oil circuit fully, reduce manufacture cost and prolonged working life simultaneously; Can control the outlet pressure of plunger pump fast and effectively, energy-saving and cost-reducing.
Description of drawings
Fig. 1 is the broken section structural representation of the embodiment of the invention 1;
Fig. 2 is the structural representation of valve body among Fig. 1;
Fig. 3 is that the A-A of Fig. 2 is to sectional view;
Fig. 4 is the structural representation of spool among Fig. 1;
Fig. 5 is the broken section structural representation of the embodiment of the invention 2.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is to Figure 5 shows that structural representation of the present invention.
Reference character wherein is: valve body 1, spool 2, the first shoulder 2a, the second shoulder 2b, the 3rd shoulder 2c, first body of rod 20a, second body of rod 20b, the 3rd body of rod 20c, first cylinder chamber 3, second cylinder chamber 4, first oil duct 5, the first inner orifice 5a, the first outer aperture 5b, the first through hole 5c, second oil duct 6, the second inner orifice 6a, the second outer aperture 6b, the second through hole 6c, the 3rd oil duct 7, the 3rd inner orifice 7a, the 3rd outer aperture 7b, third through-hole 7c, first spring seat 8, multidiameter shaft 8a, the 4th oil duct 9, adjustment seat 10, adjusting screw 11, second spring seat 12, locking nut 13, outer spring 14, inner spring 15, bolt 16, seal ring 17.
Present embodiment is the preferred embodiments of the present invention, and the pressure shut-off valve that is used for power controller as shown in Figure 1 comprises valve body 1 and spool 2.
The shaft axis that is provided with the shaft axis of first cylinder chamber 3 and second cylinder chamber, 4, the first cylinder chamber 3 and second cylinder chamber 4 in the valve body 1 overlaps and first cylinder chamber 3 and second cylinder chamber 4 are connected; Valve body 1 is provided with first oil duct 5, second oil duct 6 and the 3rd oil duct 7 that is connected with valve body 1 outside, first oil duct 5, second oil duct 6 and the 3rd oil duct 7 are communicated with second cylinder chamber 4 respectively, and the 3rd inner orifice 7a of the first inner orifice 5a of first oil duct 5 of connection place, the second inner orifice 6a of second oil duct 6 and the 3rd oil duct 7 axially evenly is spaced along second cylinder chamber 4 respectively.The diameter of the first inner orifice 5a, the second inner orifice 6a and the 3rd inner orifice 7a is 5mm in the present embodiment, and the first inner orifice 5a and the second inner orifice 6a, the second inner orifice 6a and the 3rd inner orifice 7a are spaced apart 10.1mm.
The third through-hole 7c that also is shaped on the first through hole 5c that is communicated with first oil duct 5, the second through hole 6c that is communicated with second oil duct 6 on the valve body 1 and is communicated with the 3rd oil duct 7; The outer aperture of the first through hole 5c, the second through hole 6c and third through-hole 7c is respectively horn opening.
First end of spool 2 is connected with first spring seat 8 in being arranged on first cylinder chamber 3, and first cylinder chamber 3 is provided with first black box, is fixedly connected with spring assembly between first black box and first spring seat 8.
First black box comprises the adjustment seat 10 that cooperates by thread seal with first cylinder chamber, 3 inwalls, make interior threaded hole on the adjustment seat 10, one adjusting screw 11 cooperates by thread seal with interior threaded hole, one end of adjusting screw 11 is connected with second spring seat 12 in being arranged on adjustment seat 10, and the other end of adjusting screw 11 is sealedly connected with locking nut 13.Pull down locking nut 13, rotate adjusting screw 11, the degree of tightness of adjustable springs assembly.
Spring assembly comprises outer spring 14 and the inner spring 15 that concentric is provided with.First spring seat 8 is shaped on multidiameter shaft 8a, and an end of outer spring 14 and an end of inner spring 15 are enclosed within respectively on the multidiameter shaft 8a.
Second end of spool 2 is provided with the 3rd shoulder 2c that cooperates with second cylinder chamber, 4 inner wall sealings, be provided with the 4th an axial oil duct 9 in the 3rd body of rod 20c between the second shoulder 2b and the 3rd shoulder 2c, the 4th oil duct 9 one end openings are arranged on the outer surface of the 3rd body of rod 20c, and the other end opening is arranged on the end face of the 3rd shoulder 2c.
The outer end of second cylinder chamber 4 is provided with second black box.Second black box comprises bolt 16 and the seal ring 17 that is sealed and matched with second cylinder chamber, 4 inner threads.
Under the spring assembly active force, second end of spool 2 is near second black box, first inner orifice 5a of first oil duct 5 and the second inner orifice 6a of second oil duct 6 between the first shoulder 2a and the second shoulder 2b, the first inner orifice 5a and the second inner orifice 6a mutual conduction; When the 3rd oil duct 7 injects high pressure oil by the 4th oil duct 9 between second end of spool 2 and second black box, spool 2 is in the hydraulic pressure lower slider, second inner orifice 6a of second oil duct 6 and the 3rd inner orifice 7a of the 3rd oil duct 7 between the second shoulder 2b and the 3rd shoulder 2c, the second inner orifice 6a and the 3rd inner orifice 7a mutual conduction.
The pressure oil of plunger pump outlet feeds the 3rd oil duct 7 of valve body 1, and first oil duct 5 of valve body 1 and the pressure oil in second oil duct 6 is the controlled variable piston respectively.When the pressure oil pressure of plunger pump outlet is little, hydraulic pressure in the 4th oil duct 9 is less than the elastic force of spring assembly, first inner orifice 5a of first oil duct 5 and the second inner orifice 6a of second oil duct 6 are in second body of rod 20b place of spool 2, and first oil duct 5 and second oil duct 6 are interconnected.After feeding high pressure oil in the 3rd oil duct 7, hydraulic pressure in the 4th oil duct 9 is greater than the elastic force of spring assembly, spool 2 moves, the 3rd inner orifice 7a that makes the second inner orifice 6a of second oil duct 6 and the 3rd oil duct 7 is between the second shoulder 2b and the 3rd shoulder 2c, second oil duct 6 and the 3rd oil duct 7 mutual conduction, the high-pressure oil of plunger pump outlet is introduced the variable piston by second oil duct 6, variable piston control plunger pump delivery is reduced rapidly, hydraulic pressure in the 4th oil duct 9 is less than the elastic force of spring assembly, therefore realize the constant function of outlet pressure of plunger pump, made the more energy-conservation of system.
The pressure shut-off valve that is used for power controller of this enforcement comprises valve body 1 and spool 2 as shown in Figure 5.
The shaft axis that is provided with the shaft axis of first cylinder chamber 3 and second cylinder chamber, 4, the first cylinder chamber 3 and second cylinder chamber 4 in the valve body 1 overlaps and first cylinder chamber 3 and second cylinder chamber 4 are connected; Valve body 1 is provided with first oil duct 5, second oil duct 6 and the 3rd oil duct 7 that is connected with valve body 1 outside, first oil duct 5, second oil duct 6 and the 3rd oil duct 7 are communicated with second cylinder chamber 4 respectively, and the 3rd inner orifice 7a of the first inner orifice 5a of first oil duct 5 of connection place, the second inner orifice 6a of second oil duct 6 and the 3rd oil duct 7 axially evenly is spaced along second cylinder chamber 4 respectively.The diameter of the first inner orifice 5a, the second inner orifice 6a and the 3rd inner orifice 7a is 6mm in the present embodiment, and the first inner orifice 5a and the second inner orifice 6a, the second inner orifice 6a and the 3rd inner orifice 7a are spaced apart 9mm.
The third through-hole 7c that also is shaped on the first through hole 5c that is communicated with first oil duct 5, the second through hole 6c that is communicated with second oil duct 6 on the valve body 1 and is communicated with the 3rd oil duct 7; The outer aperture of the first through hole 5c, the second through hole 6c and third through-hole 7c is respectively horn opening.
First end of spool 2 is connected with first spring seat 8 in being arranged on first cylinder chamber 3, and first cylinder chamber 3 is provided with first black box, is fixedly connected with spring assembly between first black box and first spring seat 8.
First black box comprises the adjustment seat 10 that cooperates by thread seal with first cylinder chamber, 3 inwalls and the seal ring between adjustment seat 10 and the valve body 1, and spring assembly is arranged between the adjustment seat 10 and first spring seat 8.By rotating adjustment seat 10, can regulate the distance between the adjustment seat 10 and first spring seat 8, make spring assembly be in the pressure balance point of setting.
Spring assembly comprises outer spring 14 and the inner spring 15 that concentric is provided with.First spring seat 8 is shaped on multidiameter shaft 8a, and an end of outer spring 14 and an end of inner spring 15 are enclosed within respectively on the multidiameter shaft 8a.
Second end of spool 2 is provided with the 3rd shoulder 2c that cooperates with second cylinder chamber, 4 inner wall sealings, be provided with the 4th an axial oil duct 9 in the 3rd body of rod 20c between the second shoulder 2b and the 3rd shoulder 2c, the 4th oil duct 9 one end openings are arranged on the outer surface of the 3rd body of rod 20c, and the other end opening is arranged on the end face of the 3rd shoulder 2c.
The outer end of second cylinder chamber 4 is provided with second black box.Second black box comprises bolt 16 and the seal ring 17 that is sealed and matched with second cylinder chamber, 4 inner threads.
Under the spring assembly active force, second end of spool 2 is near second black box, first inner orifice 5a of first oil duct 5 and the second inner orifice 6a of second oil duct 6 between the first shoulder 2a and the second shoulder 2b, the first inner orifice 5a and the second inner orifice 6a mutual conduction; When the 3rd oil duct 7 injects high pressure oil by the 4th oil duct 9 between second end of spool 2 and second black box, spool 2 is in the hydraulic pressure lower slider, second inner orifice 6a of second oil duct 6 and the 3rd inner orifice 7a of the 3rd oil duct 7 between the second shoulder 2b and the 3rd shoulder 2c, the second inner orifice 6a and the 3rd inner orifice 7a mutual conduction.
Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.
Claims (10)
1. the pressure shut-off valve that is used for power controller, comprise valve body (1) and spool (2), it is characterized in that: be provided with first cylinder chamber (3) and second cylinder chamber (4) in the described valve body (1), the shaft axis coincidence of the shaft axis of first cylinder chamber (3) and second cylinder chamber (4) and first cylinder chamber (3) and second cylinder chamber (4) are connected; Valve body (1) is provided with first oil duct (5), second oil duct (6) and the 3rd oil duct (7) that is connected with valve body (1) outside, first oil duct (5), second oil duct (6) and the 3rd oil duct (7) are communicated with second cylinder chamber (4) respectively, and the 3rd inner orifice (7a) of first inner orifice (5a) of first oil duct (5) of connection place, second inner orifice (6a) of second oil duct (6) and the 3rd oil duct (7) axially evenly is spaced along second cylinder chamber (4) respectively; Described spool (2) is slidingly arranged in second cylinder chamber (4), spool (2) outer surface is shaped on first shoulder (2a) and second shoulder (2b) that cooperates with second cylinder chamber (4) inner wall sealing, first shoulder (2a), second shoulder (2b) are divided into three sections of first body of rod (20a), second body of rod (20b) and the 3rd bodies of rod (20c) with spool (2), leave the gap between first body of rod (20a), second body of rod (20b) and the 3rd body of rod (20c) and second cylinder chamber (4) inwall; First end of spool (2), first spring seat (8) interior with being arranged on first cylinder chamber (3) is connected, and first cylinder chamber (3) is provided with first black box, is fixedly connected with spring assembly between first black box and described first spring seat (8); Second end of spool (2) is provided with the 3rd shoulder (2c) that cooperates with second cylinder chamber (4) inner wall sealing, the 3rd body of rod (20c) that is positioned between second shoulder (2b) and the 3rd shoulder (2c) is provided with axial the 4th oil duct (9), the 4th oil duct (9) one end openings are arranged on the outer surface of the 3rd body of rod (20c), and the other end opening is arranged on the end face of the 3rd shoulder (2c); The outer end of second cylinder chamber (4) is provided with second black box; Under the spring assembly active force, second end of spool (2) is near second black box, first inner orifice (5a) of first oil duct (5) and second inner orifice (6a) of second oil duct (6) are positioned between first shoulder (2a) and second shoulder (2b), first inner orifice (5a) and second inner orifice (6a) mutual conduction; When the 3rd oil duct (7) injects high pressure oil by the 4th oil duct (9) between second end of spool (2) and second black box, spool (2) is in the hydraulic pressure lower slider, second inner orifice (6a) of second oil duct (6) and the 3rd inner orifice (7a) of the 3rd oil duct (7) are positioned between second shoulder (2b) and the 3rd shoulder (2c), second inner orifice (6a) and the 3rd inner orifice (7a) mutual conduction.
2. the pressure shut-off valve that is used for power controller according to claim 1, it is characterized in that: described first black box comprises the adjustment seat (10) that cooperates by thread seal with first cylinder chamber (3) inwall, and described spring assembly is arranged between adjustment seat (10) and first spring seat (8).
3. the pressure shut-off valve that is used for power controller according to claim 1, it is characterized in that: described first black box comprises the adjustment seat (10) that cooperates by thread seal with first cylinder chamber (3) inwall, adjustment seat (10) goes up the system interior threaded hole, one adjusting screw (11) cooperates by thread seal with interior threaded hole, one end of adjusting screw (11), second spring seat (12) interior with being arranged on adjustment seat (10) is connected, and the other end of adjusting screw (11) is sealedly connected with locking nut (13).
4. according to claim 1 or the 2 or 3 described pressure shut-off valves that are used for power controller, it is characterized in that: described spring assembly comprises outer spring (14) and the inner spring (15) that concentric is provided with.
5. the pressure shut-off valve that is used for power controller according to claim 4 is characterized in that: described first spring seat (8) is shaped on multidiameter shaft (8a), and an end of an end of outer spring (14) and inner spring (15) is enclosed within respectively on the multidiameter shaft (8a).
6. the pressure shut-off valve that is used for power controller according to claim 5 is characterized in that: described second black box comprises bolt (16) and the seal ring (17) that is sealed and matched with second cylinder chamber (4) inner thread.
7. the pressure shut-off valve that is used for power controller according to claim 6, it is characterized in that: described first oil duct (5), second oil duct (6) and the 3rd oil duct (7) are shaped on internal thread respectively, and the 3rd outer aperture (7b) of the first outer aperture (5b) of first oil duct (5), the second outer aperture (6b) of second oil duct (6) and the 3rd oil duct (7) is a horn opening.
8. the pressure shut-off valve that is used for power controller according to claim 7 is characterized in that: the third through-hole (7c) that is shaped on first through hole (5c) that is communicated with first oil duct (5), second through hole (6c) that is communicated with second oil duct (6) on the described valve body (1) and is communicated with the 3rd oil duct (7); The outer aperture of first through hole (5c), second through hole (6c) and third through-hole (7c) is respectively horn opening.
9. the pressure shut-off valve that is used for power controller according to claim 8, it is characterized in that: described second cylinder chamber (4) diameter is 5mm to 9mm, first shoulder (2a) of spool (2), second shoulder (2b) and the 3rd shoulder (2c) diameter are corresponding with second cylinder chamber (4) diameter, and first body of rod (20a) of cylindrical valve spool (2), second body of rod (20b) and the 3rd body of rod (20c) diameter are 3mm to 7mm.
10. the pressure shut-off valve that is used for power controller according to claim 9, it is characterized in that: the diameter of described first inner orifice (5a), second inner orifice (6a) and the 3rd inner orifice (7a) is 3mm to 7mm, the 9mm to 11mm that is spaced apart of first inner orifice (5a) and second inner orifice (6a), second inner orifice (6a) and the 3rd inner orifice (7a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101526920A CN101691860B (en) | 2009-09-17 | 2009-09-17 | Pressure shut-off valve used for power controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101526920A CN101691860B (en) | 2009-09-17 | 2009-09-17 | Pressure shut-off valve used for power controller |
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| CN101691860A CN101691860A (en) | 2010-04-07 |
| CN101691860B true CN101691860B (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101526920A Active CN101691860B (en) | 2009-09-17 | 2009-09-17 | Pressure shut-off valve used for power controller |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922445B (en) * | 2010-07-29 | 2013-08-21 | 杭州力龙液压有限公司 | Constant power control valve |
| CN105673868A (en) * | 2016-04-14 | 2016-06-15 | 无锡市东液机械制造有限公司 | Valve body structure of oil drainage valve |
| CN105782471A (en) * | 2016-04-14 | 2016-07-20 | 无锡市东液机械制造有限公司 | Oil drain valve structure |
| CN114076129A (en) * | 2020-08-11 | 2022-02-22 | 徐州徐工液压件有限公司 | Signal control valve and engineering machinery |
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|---|---|---|---|---|
| CN1149331A (en) * | 1994-03-29 | 1997-05-07 | 株式会社小松制作所 | Pilot pressure operated directional control valve and operation cylinder control device |
| US5947155A (en) * | 1996-12-28 | 1999-09-07 | Aisin Aw Co., Ltd. | Linear solenoid valve |
| CN1603668A (en) * | 2003-09-29 | 2005-04-06 | 爱信艾达株式会社 | Pressure control valve |
| CN1616799A (en) * | 2004-11-12 | 2005-05-18 | 宁波华液机器制造有限公司 | Three-way ratio pressure reducing control valve |
| CN101446359A (en) * | 2008-12-30 | 2009-06-03 | 杭州鑫高科技有限公司 | Speed and pressure regulating digital valve |
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2009
- 2009-09-17 CN CN2009101526920A patent/CN101691860B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149331A (en) * | 1994-03-29 | 1997-05-07 | 株式会社小松制作所 | Pilot pressure operated directional control valve and operation cylinder control device |
| US5947155A (en) * | 1996-12-28 | 1999-09-07 | Aisin Aw Co., Ltd. | Linear solenoid valve |
| CN1603668A (en) * | 2003-09-29 | 2005-04-06 | 爱信艾达株式会社 | Pressure control valve |
| CN1616799A (en) * | 2004-11-12 | 2005-05-18 | 宁波华液机器制造有限公司 | Three-way ratio pressure reducing control valve |
| CN101446359A (en) * | 2008-12-30 | 2009-06-03 | 杭州鑫高科技有限公司 | Speed and pressure regulating digital valve |
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| CN101691860A (en) | 2010-04-07 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO WIDE SKY SKS HYDRAULIC CO., LTD. Free format text: FORMER OWNER: GAO ZHIMING Effective date: 20110419 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20110419 Address after: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Ningbo gontin sks Hydraulic Co. Ltd. Applicant after: Ningbo Wide Sky SKS Hydraulic Co., Ltd. Address before: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Ningbo gontin sks Hydraulic Co. Ltd. Applicant before: Gao Zhiming |
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| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Patentee after: SAIKESI HYDRAULIC TECHNOLOGY CO., LTD. Address before: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Ningbo gontin sks Hydraulic Co. Ltd. Patentee before: Ningbo Wide Sky SKS Hydraulic Co., Ltd. |