CN110185665A - A kind of holding valve - Google Patents
A kind of holding valve Download PDFInfo
- Publication number
- CN110185665A CN110185665A CN201910431027.9A CN201910431027A CN110185665A CN 110185665 A CN110185665 A CN 110185665A CN 201910431027 A CN201910431027 A CN 201910431027A CN 110185665 A CN110185665 A CN 110185665A
- Authority
- CN
- China
- Prior art keywords
- locking
- inlet
- hydraulic cavities
- valve core
- pressure relief
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000010992 reflux Methods 0.000 claims abstract description 18
- 230000010354 integration Effects 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 abstract description 33
- 230000000694 effects Effects 0.000 abstract description 13
- 230000009471 action Effects 0.000 abstract description 9
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 239000000446 fuel Substances 0.000 description 4
- 230000037361 pathway Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sliding Valves (AREA)
Abstract
A kind of holding valve, including locking-valve set, hydraulic cavities are equipped in locking-valve set, inlet is equipped in one end of hydraulic cavities, pressure relief opening is equipped in the other end of hydraulic cavities, at the middle part of hydraulic cavities, sliding is provided with locking-valve core, locking-valve core and hydraulic cavity wall sealed set, and locking-valve core matches with inlet close to one end of inlet and seals or separate with inlet；For the liquid outlet of hydraulic cavities setting close to inlet, one end end on locking-valve core offers through-hole；It is equipped with cavity in locking-valve core inner, cavity via through holes are communicated with hydraulic cavities and communicated with liquid outlet, and cavity is communicated with pressure relief opening, and sealing element and control piece are equipped at pressure relief opening, and sealing element is sealed or separated with pressure relief opening by control piece.When the lock seal spool inlet of setting, locking-valve core under the action of the return spring and by the pressure of reflux hydraulic oil is sealed inlet, and the reflux bigger sealing effect of hydraulic fluid pressure is better；Hydraulic oil, which enters after inlet, voluntarily to be pushed locking-valve core open and works, simple and practical.
Description
Technical field
The present invention relates to a kind of hydraulic control valves, and in particular to a kind of holding valve.
Background technique
Hydraulic Elements are big with its power, and mounting arrangements are easy, are easy to controlled, and easy to operate comfortable, failure rate is low, convenient for dimension
The advantages that shield, it is very suitable for that structural form is changeable, the application of the severe agricultural machinery of operating condition.In decades, hydraulic technique
It is more and more applied on the mechanical equipments such as agricultural machinery, lathe, engineering machinery, building machinery, space flight and aviation equipment, and shape
At huge market.The Hydraulic Elements quantity that Tendency of Agricultural Machinery in China uses is most, kind is minimum, price is minimum, therefore is most
Potential industry field.But application of the hydraulic technique on agricultural machinery is also far from enough；Meanwhile also just because of China
The low purchasing power of peasant limits application of the hydraulic technique on agricultural machinery.It is improved using the agri-machinery quality class of hydraulic technique,
Also up, peasant is beyond affordability, and such main computer boxes quality and technology content are difficult to be greatly improved for price.Therefore, host
Factory has to change configuration to exchange market for, so that main computer boxes quality and technology content all decline to reduce configuration.
Currently, the hydraulic system of Chinese tractor mostly uses the Hydraulic Elements of domestic production, wherein control lifter
Multi-way valve is basic or common manual commutation multi-way valve, the position pressure maintaining of high flow directional control valve use clearance seal, it is common to use φ
The spool of 25mm, leakage rate >=50ml/min have been unable to satisfy the quiet heavy amount requirement of lifter.It can be dropped by reducing seal clearance
Low leakage, but reduction seal clearance simply will increase dramatically manufacture difficulty and manufacturing cost, while also will increase multi-way valve
Card valve failure rate.For above situation, a kind of working hole for keeping valve to be used for multi-way valve need to be designed, guarantees leakage rate≤1ml/
Min meets the quiet heavy amount requirement of tractor lifting mechanism.
Summary of the invention
For demand in the prior art, the present invention provides a kind of holding valve, and the holding valve arrangement is simple and compact, space accounting
It is small.
A kind of holding valve, it is characterised in that: including locking-valve set, hydraulic cavities are equipped in locking-valve set, described hydraulic
One end of chamber is equipped with inlet, is equipped with pressure relief opening in the other end of the hydraulic cavities, slides setting at the middle part of the hydraulic cavities
Have a locking-valve core, the locking-valve core and the hydraulic cavity wall sealed set, the locking-valve core close to the inlet one end with
The inlet matches and seals or separate with the inlet；The liquid outlet of the hydraulic cavities setting is close to the feed liquor
Mouthful, one end end on the locking-valve core close to inlet offers through-hole；
The locking-valve core inner be equipped with cavity, the cavity communicated through the through-hole with the hydraulic cavities and with the liquid outlet
It communicates, the cavity is communicated with the pressure relief opening, and sealing element and control piece are equipped at the pressure relief opening, and the sealing element passes through
Control piece is sealed or is separated with the pressure relief opening, and the locking-valve core passes through control piece return after separating with the inlet.
The working principle of the invention: hydraulic oil with pressure enters hydraulic cavities by inlet, hydraulic oil pass through all the way through-hole into
Enter cavity, it is more preferable that the effect for making sealing element seal pressure relief opening under the pressure effect of hydraulic oil after hydraulic oil is entered in cavity；
Hydraulic oil another way carries out elevated height to external device by liquid outlet, at this point, the pressure of hydraulic oil is greater than liquid at inlet
Press the pressure at chamber, cavity and liquid outlet；After stopping to inlet fuel feeding, hydraulic oil becomes passive state at inlet, out liquid
Hydraulic oil is back to hydraulic cavities under the action of external device gravity and generates pressure at mouthful, while locking-valve core is returned by control piece
Resealed on inlet behind position, then in hydraulic cavities and cavity the equalization of pressure of hydraulic oil in liquid outlet reflux hydraulic oil
Pressure, locking-valve core makes the pressure increase of locking-valve core closure inlet under the effect of the pressure, to promote the close of inlet
Seal effect；Sealing element is separated with pressure relief opening by control piece when external device needs to land, the hydraulic oil one of liquid outlet reflux
Road is successively flowed out after hydraulic cavities, through-hole, cavity from pressure relief opening, after cavity decompression, in the effect of the hydraulic oil of liquid outlet reflux
Under, locking-valve core pushed away from inlet, so that the hydraulic oil another way of liquid outlet reflux is flowed out from inlet, with the closure of locking-valve core
Portion is less than the diameter of locking-valve core main body and premised on the end face of closure part and outer end axial plane junction is fillet surface, in liquid outlet
Under the action of the hydraulic oil of reflux, so that external device slowly lands.Then, control piece return rear seal is from novel sealing
On pressure relief opening, external device is driven again with the above process after inlet feed liquor pressure oil.
Further are as follows: the hydraulic cavities and locking-valve core are cartridge type, and the both ends end of the locking-valve core is respectively sliding part
And closure part, the sliding part are slidably matched with the hydraulic cavities, the port sealing setting of the closure part, the closure part
End face and outer end axial plane junction are fillet surface, be located on the inner wall of the hydraulic cavities integration at the inlet be equipped with
The annular ridge that the fillet surface matches, the annular ridge and the chamfering face contact and sealed set；The through-hole position
In on the excircle of the closure part.It is more preferable that this face contacts the sealing effect being sealed with line.
Further are as follows: the sealing element includes the sliding slot of ball sealer and fixed setting, and the ball sealer is located at the sliding slot
It is interior and be slidably matched with the sliding slot；Described sliding slot one end covers on the pressure relief opening；The control piece include return spring and
Mandril, the return spring are positioned in the chute, and the side of the ball sealer blocks the ball sealer on the pressure relief opening
The other side connect with one end of the return spring, the other end of the return spring is fixed on the locking-valve core；
The mandril separates it with the pressure relief opening for withstanding ball sealer.Make ball sealer and locking-valve under the action of the return spring
Set carries out return；The mandril is slidably matched with the locking-valve set, described mandril one end end close to the pressure relief opening (, it is described
It is external that the other end of mandril is located at locking-valve set).Outer power drive mandril is mobile, and mandril, which withstands ball sealer, lets out ball sealer disengaging
Press mouth.
Further are as follows: the port openings of the sliding part are arranged, the sliding slot position in the cavity, the return spring
One end be connected on the ball sealer, the other end of the return spring is connected on the inner face of the closure part.So that
More compact structure.
Further are as follows: including first guide bracket, elder generation's guide bracket sealing is fixed in the hydraulic cavities, and the pressure relief opening is located at institute
It states on first guide bracket, the sliding slot and the first guide bracket integrated setting.Easy to process and assembly.
Further are as follows: sliding sleeve is equipped between the mandril and hydraulic cavities, the sliding sleeve sealing is fixed on the hydraulic cavities
Interior, the middle part of the mandril is slidably matched with the sliding sleeve and sealed set, the outer end of the mandril are located at outside the sliding sleeve；
There are gap between first guide bracket and sliding sleeve, the position that the gap is corresponded on locking-valve set is equipped with refluxing opening.Described time
Head piece is for the hydraulic oil that pressure relief opening flows out to be back in fuel reserve tank.
Beneficial effects of the present invention: when the lock seal spool inlet of setting, locking-valve core is under the action of the return spring simultaneously
Inlet is sealed by the pressure of reflux hydraulic oil, the reflux bigger sealing effect of hydraulic fluid pressure is better, to meet
Requirement of the multi-way valve to leakage rate；Hydraulic oil, which enters after inlet, voluntarily to be pushed locking-valve core open and works, simple and practical；Inlet
Fin is set and locks the chamfering face contact of spool end and is sealed, it is more preferable that this face contacts the sealing effect being sealed with line, no
Easily leakage；The assembly of locking-valve core, return spring and ball sealer, structure are simply easily assembled, simple and stable structure；It is pushed by mandril
Ball sealer opens pressure relief opening and carries out pressure release, and structure is simple to operation, avoids the complexity of previous internal operation structure.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view under invention first state；
Fig. 2 is the schematic cross-sectional view under the second state of inventing；
Fig. 3 is the schematic cross-sectional view under the invention third state.
In figure, 1, mandril；2, sliding sleeve；3, locking-valve set；30, hydraulic cavities；31, inlet；311, annular ridge；32, go out liquid
Mouthful；33, refluxing opening；4, first guide bracket；41, pressure relief opening；5, ball sealer；6, locking-valve core；60, cavity；61, sliding part；62, it blocks
Portion；621, through-hole；622, fillet surface；7, return spring；8, sliding slot.
Specific embodiment
It elaborates with reference to the accompanying drawing to the present invention.It should be noted that left, center, right in present example,
The positional terms such as upper and lower are only relative concepts or be to refer to, and should not be considered as with the normal operating condition of product each other
It is restrictive.
A kind of holding valve, as depicted in figs. 1 and 2, including locking-valve set 3, hydraulic cavities 30 are equipped in locking-valve set 3,
One end of the hydraulic cavities 30 is equipped with inlet 31, pressure relief opening 41 is equipped in the other end of the hydraulic cavities 30, described hydraulic
The middle part sliding of chamber 30 is provided with locking-valve core 6, the locking-valve core 6 and the 30 inner wall sealed set of hydraulic cavities, the locking-valve core 6
Match close to one end of the inlet 31 with the inlet 31 and seals or separate with the inlet 31；It is described hydraulic
For the liquid outlet 32 that chamber 30 is arranged close to the inlet 31, the liquid outlet 32 is located at the end on locking-valve set 3 where inlet 31
Portion, one end end on the locking-valve core 6 close to inlet offer through-hole 621；
Inside the locking-valve core 6 be equipped with cavity 60, the cavity 60 communicated through the through-hole 621 with the hydraulic cavities 30 and with
The liquid outlet 32 communicates, and the cavity 60 is communicated with the pressure relief opening 41, and sealing element and control are equipped at the pressure relief opening 41
Product, the sealing element are sealed or are separated with the pressure relief opening 41 by control piece, and the locking-valve core 6 divides with the inlet 31
Pass through control piece return from rear；
Wherein, as shown in connection with fig. 3, the hydraulic cavities 30 and locking-valve core 6 are cartridge type, the both ends end difference of the locking-valve core 6
For sliding part 61 and closure part 62, the sliding part 61 is slidably matched with the hydraulic cavities 30, the excircle of the sliding part 61
Match and be bonded with the excircle of hydraulic cavities 30, the port sealing setting of the closure part 62, the end face of the closure part 62
It is fillet surface 622 with outer end axial plane junction, integration at the inlet 31 is located on the inner wall of the hydraulic cavities 30 and is set
There is the annular ridge 311 to match with the fillet surface 622, offers feed pathway, the inner end of feed pathway on locking-valve set 3
For inlet 31, feed pathway is the radius that round and radius is less than hydraulic cavities 30, in the inner end of feed pathway to hydraulic cavities 30
Inner wall forms step, is equipped with chamfering in the upper edge of step, the upper edge of the chamfering is the annular ridge 311, described
Annular ridge 311 is contacted with the fillet surface 622 and sealed set；The through-hole 621 is located at the excircle of the closure part 62
On；
Sealing element includes the sliding slot 8 of ball sealer 5 and fixed setting, and ball sealer 5 is located in sliding slot 8 and is slidably matched with sliding slot 8；It is sliding
8 one end of slot covers on pressure relief opening 41；Control piece includes return spring 7 and mandril 1, and return spring 7 is located in sliding slot 8, ball sealer 5
Side block on pressure relief opening 41, the other side of ball sealer 5 is connect with one end of return spring 7, the other end of return spring 7
It is fixed on locking-valve core 6；Mandril 1 separates it with pressure relief opening 41 for withstanding ball sealer 5.In the effect of return spring 7
Down so that ball sealer 5 and locking-valve set 3 carry out returns；The middle part of mandril 1 is slidably matched with locking-valve set 3, and 1 inner end end of mandril is close
Pressure relief opening 41, the inner end end of mandril 1 are less than pressure relief opening 41, when mandril 1 is threaded through in pressure relief opening 41 and pressure relief opening 41 there are
Gap, the outer end of mandril 1 are located at outside locking-valve set 3；The port openings of sliding part 61 are arranged, and sliding slot 8 is located in cavity 60, return bullet
One end of spring 7 is connected on ball sealer 5, and the other end of return spring 7 is connected on the inner face of closure part 62；Including first guide bracket
4, the first sealing of guide bracket 4 is fixed in hydraulic cavities 30, and first guide bracket 4 is interference fitted with 30 inner wall of hydraulic cavities and is equipped with therebetween close
Seal, pressure relief opening 41 are located on first guide bracket 4,4 integrated setting of sliding slot 8 and first guide bracket, the mandril, ball sealer, return spring,
Locking-valve core, locking-valve set are located on same axis.
As shown in connection with fig. 3, sliding sleeve 2 is equipped between mandril 1 and hydraulic cavities 30, sliding sleeve 2 is sealed and passed through by sealing ring
The mode of interference fit is installed in hydraulic cavities 30, and the middle part of mandril 1 is slidably matched with sliding sleeve 2 and is set by sealing ring sealing
It sets, the outer end of mandril 1 is located at outside sliding sleeve 2；There are gaps between first guide bracket 4 and sliding sleeve 2, correspond to gap on locking-valve set 3
Position be equipped with refluxing opening 33.
The working principle of the invention: hydraulic oil with pressure enters hydraulic cavities, hydraulic oil one after pushing locking-valve core open by inlet
Road enters cavity by through-hole, makes ball sealer seal pressure relief opening under the pressure effect of hydraulic oil after hydraulic oil is entered in cavity
Effect it is more preferable, wherein ball sealer blocks on pressure relief opening always under the action of the return spring；Hydraulic oil another way is by going out
Liquid mouth carries out elevated height to external device, at this point, the pressure of hydraulic oil is greater than at hydraulic cavities, cavity and liquid outlet at inlet
Pressure；After stopping to inlet fuel feeding, hydraulic oil becomes passive state at inlet, and hydraulic oil is in external device at liquid outlet
It is back to hydraulic cavities under the action of gravity and generates pressure, while locking-valve core after return spring return by resealing in feed liquor
On mouth, then the equalization of pressure of hydraulic oil is in the pressure of liquid outlet reflux hydraulic oil in hydraulic cavities and cavity, and locking-valve core is in the pressure
Locking-valve core is made to block the pressure increase of inlet under the action of power, to promote the sealing effect of inlet；External device needs
It withstands ball sealer by mandril when landing to separate ball sealer with pressure relief opening, the hydraulic oil of liquid outlet reflux is all the way successively through liquid
It is flowed out after pressing chamber, through-hole, cavity from pressure relief opening, after cavity decompression, the diameter of locking-valve core main body is less than with the closure part of locking-valve core
And premised on the end face of closure part and outer end axial plane junction are fillet surface, under the action of the hydraulic oil of liquid outlet reflux,
Locking-valve core pushed away from inlet, so that the hydraulic oil another way of liquid outlet reflux is flowed out from inlet, so that external device
Slowly land, hydraulic oil is back in fuel reserve tank after going out pressure relief opening through refluxing opening.Then, in the work of return spring after mandril return
It is resealed on pressure relief opening with lower ball sealer, external device is driven again with the above process after inlet feed liquor pressure oil.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (6)
1. a kind of holding valve, it is characterised in that: including locking-valve set, hydraulic cavities are equipped in locking-valve set, in the hydraulic cavities
One end be equipped with inlet, the hydraulic cavities the other end be equipped with pressure relief opening, the hydraulic cavities middle part sliding be provided with
Locking-valve core, the locking-valve core and the hydraulic cavity wall sealed set, the one end and institute of the locking-valve core close to the inlet
Inlet is stated to match and seal or separate with the inlet；The liquid outlet of hydraulic cavities setting close to the inlet,
One end end on the locking-valve core close to inlet offers through-hole；
The locking-valve core inner be equipped with cavity, the cavity communicated through the through-hole with the hydraulic cavities and with the liquid outlet
It communicates, the cavity is communicated with the pressure relief opening, and sealing element and control piece are equipped at the pressure relief opening, and the sealing element passes through
Control piece is sealed or is separated with the pressure relief opening.
2. a kind of holding valve according to claim 1, it is characterised in that: the hydraulic cavities and locking-valve core are cartridge type, institute
The both ends end for stating locking-valve core is respectively sliding part and closure part, and the sliding part is slidably matched with the hydraulic cavities, the envelope
The port sealing setting in stifled portion, the end face and outer end axial plane junction of the closure part are fillet surface, in the hydraulic cavities
Be located at integration at the inlet on wall and be equipped with the annular ridge that matches with the fillet surface, the annular ridge with it is described
Chamfering face contact and sealed set；The through-hole is located on the excircle of the closure part.
3. a kind of holding valve according to claim 2, it is characterised in that: the sealing element includes ball sealer and fixed setting
Sliding slot, the ball sealer is positioned in the chute and is slidably matched with the sliding slot；Described sliding slot one end covers on the pressure release
On mouth；The control piece includes return spring and mandril, and the return spring is positioned in the chute, the side of the ball sealer
It blocks on the pressure relief opening, the other side of the ball sealer is connect with one end of the return spring, the return spring
The other end is fixed on the locking-valve core；The mandril is slidably matched with the locking-valve set, and described mandril one end end is leaned on
The nearly pressure relief opening.
4. a kind of holding valve according to claim 3, it is characterised in that: the port openings of the sliding part are arranged, described
In the cavity, one end of the return spring is connected on the ball sealer for sliding slot position, the other end of the return spring
It is connected on the inner face of the closure part.
5. a kind of holding valve according to claim 4, it is characterised in that: including first guide bracket, elder generation's guide bracket sealing is fixed
In the hydraulic cavities, the pressure relief opening is located on the first guide bracket, the sliding slot and the first guide bracket integrated setting.
6. a kind of holding valve according to claim 5, it is characterised in that: be equipped with and slide between the mandril and hydraulic cavities
Set, the sliding sleeve sealing are fixed in the hydraulic cavities, and the middle part of the mandril is slidably matched with the sliding sleeve and sealed set,
The outer end of the mandril is located at outside the sliding sleeve；There are gaps between first guide bracket and sliding sleeve, corresponding on locking-valve set
The position in the gap is equipped with refluxing opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910431027.9A CN110185665A (en) | 2019-05-22 | 2019-05-22 | A kind of holding valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910431027.9A CN110185665A (en) | 2019-05-22 | 2019-05-22 | A kind of holding valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110185665A true CN110185665A (en) | 2019-08-30 |
Family
ID=67717299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910431027.9A Pending CN110185665A (en) | 2019-05-22 | 2019-05-22 | A kind of holding valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110185665A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145508A (en) * | 2019-05-22 | 2019-08-20 | 新乡市德恩智能工业有限公司 | A kind of multi-way valve equipped with holding valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1652603A1 (en) * | 1989-05-06 | 1991-05-30 | Подмосковный Научно-Исследовательский И Проектно-Конструкторский Угольный Институт | Hydraulic unit for prop |
| KR20030046752A (en) * | 2001-12-06 | 2003-06-18 | 한일유압 주식회사 | Holding valve apparatus for excavator and its oil pressure control method |
| CN201187316Y (en) * | 2008-04-17 | 2009-01-28 | 北京天地玛珂电液控制系统有限公司 | Balance hoisting jack bidirectional lock and hydraulic support |
| CN201934111U (en) * | 2011-01-14 | 2011-08-17 | 丰隆液压有限公司 | Cartridge type balance jack two-way lock |
| CN202250115U (en) * | 2011-09-06 | 2012-05-30 | 巨隆集团芜湖兴隆液压有限公司 | Cartridge type hard-seal bidirectional lock |
| CN202718699U (en) * | 2012-08-06 | 2013-02-06 | 巨隆集团芜湖兴隆液压有限公司 | Large flow bidirectional lock |
| CN202718700U (en) * | 2012-08-06 | 2013-02-06 | 巨隆集团芜湖兴隆液压有限公司 | Middle flow reversible lock |
| CN103291339A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Medium flow balancing two-way lock |
| CN103291340A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Large-flow balance bidirectional lock |
| CN210240156U (en) * | 2019-05-22 | 2020-04-03 | 新乡市德恩智能工业有限公司 | Holding valve |
-
2019
- 2019-05-22 CN CN201910431027.9A patent/CN110185665A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1652603A1 (en) * | 1989-05-06 | 1991-05-30 | Подмосковный Научно-Исследовательский И Проектно-Конструкторский Угольный Институт | Hydraulic unit for prop |
| KR20030046752A (en) * | 2001-12-06 | 2003-06-18 | 한일유압 주식회사 | Holding valve apparatus for excavator and its oil pressure control method |
| CN201187316Y (en) * | 2008-04-17 | 2009-01-28 | 北京天地玛珂电液控制系统有限公司 | Balance hoisting jack bidirectional lock and hydraulic support |
| CN201934111U (en) * | 2011-01-14 | 2011-08-17 | 丰隆液压有限公司 | Cartridge type balance jack two-way lock |
| CN202250115U (en) * | 2011-09-06 | 2012-05-30 | 巨隆集团芜湖兴隆液压有限公司 | Cartridge type hard-seal bidirectional lock |
| CN202718699U (en) * | 2012-08-06 | 2013-02-06 | 巨隆集团芜湖兴隆液压有限公司 | Large flow bidirectional lock |
| CN202718700U (en) * | 2012-08-06 | 2013-02-06 | 巨隆集团芜湖兴隆液压有限公司 | Middle flow reversible lock |
| CN103291339A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Medium flow balancing two-way lock |
| CN103291340A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Large-flow balance bidirectional lock |
| CN210240156U (en) * | 2019-05-22 | 2020-04-03 | 新乡市德恩智能工业有限公司 | Holding valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145508A (en) * | 2019-05-22 | 2019-08-20 | 新乡市德恩智能工业有限公司 | A kind of multi-way valve equipped with holding valve |
| CN110145508B (en) * | 2019-05-22 | 2024-03-22 | 新乡市德恩智能工业有限公司 | Multi-way valve with holding valve |
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