CN204042073U - Valve auxiliary structure and solenoid directional control valve - Google Patents
Valve auxiliary structure and solenoid directional control valve Download PDFInfo
- Publication number
- CN204042073U CN204042073U CN201420330494.5U CN201420330494U CN204042073U CN 204042073 U CN204042073 U CN 204042073U CN 201420330494 U CN201420330494 U CN 201420330494U CN 204042073 U CN204042073 U CN 204042073U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve pocket
- spool
- actuator port
- 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.)
- Expired - Lifetime
Links
- 210000000664 rectum Anatomy 0.000 claims abstract description 30
- 239000000945 filler Substances 0.000 claims abstract description 28
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 4
- 239000007769 metal material Substances 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 13
- 239000002184 metal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Landscapes
- Magnetically Actuated Valves (AREA)
Abstract
This application discloses a kind of solenoid directional control valve and valve auxiliary structure, wherein spool and valve pocket are made up of special ceramic material, and the latus rectum span of valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 6.5-20mm, and adopts clearance seal between spool and valve pocket.This special ceramic material has excellent engineering properties, and less than 120 DEG C expansions are zero substantially, can ensure that the clearance seal effect of valve auxiliary structure is not by the impact that spool expands.And the abrasion resistance of special ceramic material, life-span, hardness, density, the relatively existing metallic material of pressure withstanding degree have and significantly improve, therefore gap sealed gap length span can get 0.003-0.009mm, can meet the utilization of big orifice solenoid directional control valve.
Description
Technical field
The application relates to a kind of solenoid directional control valve for hydraulic system, especially relates to the solenoid directional control valve of more than 63Mpa hydraulic system.
Background technique
Solenoid directional control valve is the commercial plant by Electromagnetic Control, is used to the automation foundation components and parts controlling fluid, adjusts the direction of flowing medium in industrial control system of being everlasting.Solenoid directional control valve is very important hydraulic control component, its effect is by the conversion relative working position of valve core in valve body, the each hydraulic fluid port of valve body is made to be communicated with or to disconnect, thus the commutation of hydraulic control executive component (as hydraulic rod, oil hydraulic motor) or start and stop.Namely utilize the switching of electromagnet electricity and directly promote the connected state that spool carrys out control port, namely utilizing electromagnetic attraction to handle the control valve in spool transposition direction.
Solenoid directional control valve divides guiding valve, rotary valve and ball valve, uses the most general with sliding valve style solenoid directional control valve.As shown in Figure 1, the valve body 1 li of electromagnetic switch guiding valve is provided with airtight cavity, is spool 2 in the middle of cavity.Have at the diverse location of valve body 1 and be communicated with outside hydraulic fluid port, hydraulic fluid port is divided into oil inlet P, two actuator ports A, B, oil return inlet T (or O), each hydraulic fluid port connects different pipelines, oil inlet P is used for oil-feed, and actuator port A, B are communicated with executive component, and oil return inlet T is communicated with oil sump tank, for oil return, namely form sliding pair by spool 2 and valve body 1, spool 2 slides thus oil inlet P is communicated with actuator port A or actuator port B, realizes commutation.
As shown in Figure 1, now spool 2 mediates, and oil inlet P and actuator port A, B are all in off state, and oil inlet P is without oil-feed, and oil return inlet T is also without oil return, and A mouth and B mouth are without running of hydraulic power oil, and oil hydraulic cylinder is in state of equilibrium.As shown in Figure 2, spool 2 is moved to the left position shown in Fig. 2 under electromagnet effect, now oil inlet P is communicated with actuator port A, fluid enters hydraulic jack from oil inlet P through actuator port A, and actuator port B and oil inlet P are in off state, actuator port B and being communicated with valve pocket oil return inlet T, carries out oil return.When need commutate to executive component, as shown in Figure 3, spool 2 moves right to position shown in Fig. 3 under electromagnet effect, now oil inlet P is communicated with actuator port B, fluid enters hydraulic jack from oil inlet P through actuator port B, and actuator port A and oil inlet P are in off state, actuator port A and being communicated with valve pocket oil return inlet T, carries out oil return.
But existing solenoid directional control valve adopts metal spool and valve body substantially, because metallic material self has performance of comparatively significantly expanding with heat and contract with cold, relatively low consistency and elasticity modulus, except a small amount of heating distortion, also trace meter material residual stress can be produced because of its cold plasticity in retrofit, this kind of stress can make metal workpiece size unstable, make metal more perishable and make raise in it, lattice plays pendulum, so metal spool and valve body quality of fit are restricted.
The latus rectum of solenoid directional control valve often increases a bit still more, it needs the area of sealing (periphery amasss) just to become progression to increase, so for the larger solenoid directional control valve of latus rectum, such as latus rectum is 10,20mm, its sealing difficulty relative to conventional latus rectum solenoid directional control valve just higher, and metal spool of the prior art and Sealing are the seal requests that cannot meet big orifice solenoid directional control valve, therefore in prior art, almost there is no the solenoid directional control valve of big orifice.
Summary of the invention
The application provides a kind of for solenoid directional control valve and valve auxiliary structure.
Based on above goal of the invention, the application provides a kind of valve auxiliary structure, comprises
Valve pocket, described valve pocket has valve pocket chamber, and the chamber wall in described valve pocket chamber offers valve pocket filler opening, at least one valve pocket actuator port and valve pocket return opening;
And spool, described spool is loaded in valve pocket chamber, and the inwall in described spool and valve pocket chamber forms sliding pair;
Described valve pocket and spool all adopt special ceramic material to make, described spool and valve pocket are clearance seal, and the latus rectum span of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 6.5-20mm, described gap sealed gap length span is 0.003-0.009mm.
Based on above goal of the invention, the application also provides a kind of solenoid directional control valve, comprise valve body and electromagnet assembly, described valve body has valve body chamber, the internal chamber wall in described valve body chamber has valve body filler opening, at least one valve body actuator port and valve body return opening, and described electromagnet assembly comprises electromagnet and liftout mechanism; Also comprise a kind of valve auxiliary structure, described valve pair comprises:
Valve pocket, described valve pocket has valve pocket chamber, the chamber wall in described valve pocket chamber offers valve pocket filler opening, at least one valve pocket actuator port and valve pocket return opening, described valve pocket is fixedly embedded in valve body chamber, described valve pocket filler opening is communicated with valve body filler opening, and described valve pocket actuator port is communicated with valve body actuator port;
And spool, described spool is loaded in valve pocket chamber, and the inwall in described spool and valve pocket chamber forms sliding pair;
Described valve pocket and spool all adopt special ceramic material to make, and described spool and valve pocket are clearance seal, and the latus rectum of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 6.5-20mm, and described gap sealed gap length is 0.003-0.009mm; Described electromagnet acts on spool by liftout mechanism, drives spool to slide in valve pocket chamber, is communicated with the valve body actuator port that control valve body is specified with valve body filler opening or valve body return opening.
As the further improvement of above-mentioned valve auxiliary structure and solenoid directional control valve, the latus rectum of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 10mm, and described gap sealed gap length is 0.003-0.006mm.
As the further improvement of above-mentioned valve auxiliary structure and solenoid directional control valve, the latus rectum of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 20mm, and described gap sealed gap length is 0.005-0.009mm.
As the further improvement of above-mentioned valve auxiliary structure and solenoid directional control valve, the two ends shaft shoulder of described spool has balancing slit, and described balancing slit is wide is 0.1 ~ 0.3mm, is 1.0 ~ 1.5mm deeply.
The beneficial effect of the application is:
In the solenoid directional control valve that the application provides and valve auxiliary structure, compared with existing metal spool, the application's spool and valve pocket are made up of special ceramic material, and the latus rectum span of valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 6.5-20mm, and adopts clearance seal between spool and valve pocket.This special ceramic material has excellent engineering properties, and less than 120 DEG C expansions are zero substantially, can ensure that the clearance seal effect of valve auxiliary structure is not by the impact that spool expands.And the abrasion resistance of special ceramic material, life-span, hardness, density, the relatively existing metallic material of pressure withstanding degree have and significantly improve, therefore gap sealed gap length span can get 0.003-0.009mm, can meet the utilization of big orifice solenoid directional control valve.
Accompanying drawing explanation
Fig. 1 is the structural representation under a kind of electromagnetic switch valve core is in zero-bit state;
Fig. 2 is the structural representation that a kind of electromagnetic switch valve core A and P is communicated with;
Fig. 3 is the structural representation that a kind of electromagnetic switch valve core B and P is communicated with;
Fig. 4 is the structural representation of a kind of embodiment of the application's solenoid directional control valve;
Fig. 5 is the schematic diagram of middle valve auxiliary structure embodiment illustrated in fig. 4;
Fig. 6 is the schematic diagram of middle valve core structure embodiment illustrated in fig. 4.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.The application can realize with multiple different form, is not limited to the mode of execution described by the present embodiment.The object of following embodiment is provided to be convenient to the clearer understanding thoroughly of the application's disclosure.
For better understanding the application, be now explained as follows to give a definition:
Working pressure in solenoid directional control valve hydraulic system is less than 35Mpa and is defined as normal pressure by the application, 35Mpa-63Mpa is (containing 35Mpa, not containing 63Mpa) be defined as sub-high pressure, 63-100Mpa is (containing 63Mpa, not containing 100Mpa) be defined as high pressure, 100Mpa-400Mpa (containing 100Mpa, not containing 400Mpa) is defined as ultrahigh pressure, more than 400Mpa (containing 400Mpa) is called super ultrahigh pressure.
Hydraulic fluid port latus rectum is called conventional latus rectum solenoid directional control valve at the solenoid valve of below 6mm, and the solenoid valve that hydraulic fluid port latus rectum is greater than 6mm is called big orifice solenoid directional control valve.This hydraulic fluid port latus rectum refers to the latus rectum for the hydraulic fluid port of flowing medium flowing on the valve body of solenoid directional control valve and valve pocket.
Embodiment
As shown in Figure 4, the application provides a kind of solenoid directional control valve, and it comprises valve body 21, valve pocket 22, spool 23 and electromagnet assembly, and wherein valve pocket 22 and spool 23 all adopt special ceramic material to make, and forms a pair valve auxiliary structure.
Please refer to Fig. 5, valve auxiliary structure comprises valve pocket 22 and spool 23, this valve pocket 22 has valve pocket chamber 221, valve pocket chamber 221 wall offers valve pocket oil inlet P 1, two valve pocket actuator ports A1, B1 (actuator port can be more than one, and the present embodiment is two) and valve pocket oil return inlet T.This spool 23 is loaded in valve pocket chamber 221.Spool 23 surface coordinates with the inner wall sealing in valve pocket chamber 221 and forms sliding pair, in sliding process, by the outer surface of spool 23, valve pocket oil inlet P 1 is communicated with the valve pocket actuator port of specifying, as valve pocket oil inlet P 1 is communicated with actuator port A1, actuator port B1 and valve pocket oil inlet P 1 disconnect, and actuator port B1 is communicated with valve pocket oil return inlet T; Or valve pocket oil inlet P 1 is closed with actuator port B1 connected sum, actuator port A1 and valve pocket oil inlet P 1 disconnect, and actuator port A1 is communicated with valve pocket oil return inlet T.
Wherein, the present embodiment valve pocket 22 and spool 23 all adopt special ceramic material (being also called special cermacis, fine ceramics) to make, and valve pocket 22 and being sealed and matched of spool 23 refer between spool 23 and valve pocket 22 to be clearance seal.The latus rectum span of the valve pocket filler opening of the present embodiment, valve pocket actuator port and valve pocket return opening is 6.5-20mm, as latus rectum get 6.5,10,20mm etc.Gap sealed gap length is 0.003-0.009mm.
About choosing of hydraulic fluid port latus rectum and gap length, provide several groups of examples here:
1, the latus rectum of valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 10mm, gap sealed gap length is 0.003-0.006mm, such as 0.005mm, wherein 0.003mm gap is applicable to the solenoid directional control valve of below 120Mpa, 0.005mm gap is applicable to the solenoid directional control valve of below 100Mpa, and 0.006mm gap is applicable to the solenoid directional control valve of below 70Mpa.
2, the latus rectum of valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 20mm, gap sealed gap length is 0.005-0.009mm, wherein 0.005mm gap is applicable to the solenoid directional control valve of below 100Mpa, and 0.009mm gap is applicable to the solenoid directional control valve of below 50Mpa.
3, the latus rectum of valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 20mm, and gap sealed gap length is 0.006-0.007mm, and wherein 0.007mm gap is applicable to the solenoid directional control valve of below 70Mpa.
The special ceramic material abrasion resistance adopted in the present embodiment, life-span, hardness, density, pressure withstanding degree all significantly improve, there are good self lubricity and corrosion stability, simultaneously due to performance of expanding with heat and contract with cold, higher consistency and elasticity modulus that special ceramic material is less, thus process heat expansion distortion and cold plasticity all less, therefore can apply to latus rectum and be greater than
the solenoid directional control valve of 6mm, reaches seal request.
Because spy's valve pair of making pottery can reach clearance seal permissible accuracy, sealing material that therefore completely can be other, directly utilizes the micro-gap between movement parts to seal.And owing to having gap to exist between proportioning valve pair, so frictional force is little, heating is few, and the life-span is long.And need not any sealing material, so special pottery valve auxiliary structure is simply compact, size is little.
And the spy to be made up of this special ceramic material secondary heatproof of valve of making pottery is very high, can use in hot environment.Because special ceramic material has good self lubricity, it can be used for various flowing medium, also because its good corrosion stability, can be widely applied in the corrosive atmospheres such as acid-alkali salt, as fields such as ocean, chemical industry, oil.
The performance of expanding with heat and contract with cold that this special ceramic material is less, higher consistency and elasticity modulus, thus process heat expansion distortion and cold plasticity all less.So list can reach clearance seal permissible accuracy, also help and detect and superfinishing size Control online cooperation, the wildcard of spool and valve pocket can be accomplished, be convenient to change component, applicable batch production.
Please continue to refer to Fig. 4, valve body 21 has valve body chamber, and the internal chamber wall in valve body chamber has valve body oil inlet P 2, valve body actuator port A2, B2 and valve body return opening (not shown).In valve auxiliary structure, valve pocket 22 is fixedly embedded in valve body chamber, valve pocket oil inlet P 1 is communicated with valve body oil inlet P 2, valve pocket actuator port A1 is communicated with valve body actuator port A2, valve pocket actuator port B1 is communicated with valve body actuator port B2, wherein, valve pocket oil inlet P 1, two valve pocket actuator port A1, B1 and valve pocket oil return inlet T are adaptive with valve body oil inlet P 2, valve body actuator port A2, B2 and valve body return opening latus rectum size respectively.
This electromagnet assembly is divided into the first electromagnet assembly and the second electromagnet assembly, and this first electromagnet assembly comprises electromagnet 241, coil 251, plug 261, liftout mechanism and spring.This second electromagnet assembly comprises electromagnet 242, coil 252, plug 262, liftout mechanism and spring.
Electromagnet acts on spool 23 by liftout mechanism, spool 23 is slided in valve pocket chamber 221, is communicated with or closes each hydraulic fluid port, thus the commutation of hydraulic control executive component (as hydraulic rod, oil hydraulic motor) or start and stop.Namely utilize the switching of electromagnet electricity and directly promote connected state that spool 23 carrys out control port and namely utilize electromagnetic attraction to handle spool 23 to replace the control valve in direction.Below just sketch the control procedure of this electromagnet assembly, in fact to control the Principle of Process of spool identical with existing solenoid directional control valve for this electromagnet assembly, here with regard to no longer superfluous words.
Fixedly inlay to adopt with the internal chamber wall in valve body chamber for valve pocket 22 and be tightly fixed, specific operation are heated valve body 21 and valve pocket 22, embedded in the valve body chamber of valve body 21 by valve pocket 22 at a certain temperature, cool the latter two and realize drive fit mosaic structure.
In order to strengthen the fixing of valve pocket 22 and valve body, the outer surface of valve pocket 22 can arrange at least one ring annular groove.
As shown in Figure 6, the shaft shoulder 231 of spool 23 also has balancing slit 232, the quantity of balancing slit is 0.75-1.25 times of balancing slit quantity on existing conventional latus rectum solenoid directional control valve, such as, be 5 ~ 7.Wide 0.1 ~ the 0.3mm of balancing slit, such as 0.2mm are 1.0 ~ 1.5mm deeply.The object arranging balancing slit 232 is the uniform property of its radial pressure of reinforcement, reduces flowed friction, increases its centering and reduce and leak.
Due to the excellent engineering properties of this extraordinary special ceramic material, less than 120 DEG C expansions are that zero sealing is unaffected substantially, and extraordinary special ceramic material, its abrasion resistance, life-span, hardness, density, pressure withstanding degree all significantly improve, and can meet the technical need of high pressure, Superhigh Pressure Hydraulic System solenoid directional control valve.
Above content is in conjunction with concrete mode of execution further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made.
Claims (10)
1. a valve auxiliary structure, is characterized in that, comprises
Valve pocket, described valve pocket has valve pocket chamber, and the chamber wall in described valve pocket chamber offers valve pocket filler opening, at least one valve pocket actuator port and valve pocket return opening;
And spool, described spool is loaded in valve pocket chamber, and the inwall in described spool and valve pocket chamber forms sliding pair;
Described valve pocket and spool all adopt special ceramic material to make, described spool and valve pocket are clearance seal, and the latus rectum span of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 6.5-20mm, described gap sealed gap length span is 0.003-0.009mm.
2. valve auxiliary structure as claimed in claim 1, it is characterized in that, the latus rectum of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 10mm, and described gap sealed gap length span is 0.003-0.006mm.
3. valve auxiliary structure as claimed in claim 2, it is characterized in that, described gap sealed gap length is 0.005mm.
4. valve auxiliary structure as claimed in claim 1, it is characterized in that, the latus rectum of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 20mm, and described gap sealed gap length span is 0.005-0.009mm.
5. valve auxiliary structure as claimed in claim 4, it is characterized in that, described gap sealed gap length span is 0.006-0.007mm.
6. valve auxiliary structure as claimed in claim 1, it is characterized in that, the two ends shaft shoulder of described spool has balancing slit, and described balancing slit is wide is 0.1 ~ 0.3mm, is 1.0 ~ 1.5mm deeply.
7. a solenoid directional control valve, comprise valve body and electromagnet assembly, described valve body has valve body chamber, and the internal chamber wall in described valve body chamber has valve body filler opening, at least one valve body actuator port and valve body return opening, and described electromagnet assembly comprises electromagnet and liftout mechanism; It is characterized in that, also comprise a kind of valve auxiliary structure, described valve pair comprises:
Valve pocket, described valve pocket has valve pocket chamber, the chamber wall in described valve pocket chamber offers valve pocket filler opening, at least one valve pocket actuator port and valve pocket return opening, described valve pocket is fixedly embedded in valve body chamber, described valve pocket filler opening is communicated with valve body filler opening, and described valve pocket actuator port is communicated with valve body actuator port;
And spool, described spool is loaded in valve pocket chamber, and the inwall in described spool and valve pocket chamber forms sliding pair;
Described valve pocket and spool all adopt special ceramic material to make, and described spool and valve pocket are clearance seal, and the latus rectum of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 6.5-20mm, and described gap sealed gap length is 0.003-0.009mm; Described electromagnet acts on spool by liftout mechanism, drives spool to slide in valve pocket chamber, is communicated with the valve body actuator port that control valve body is specified with valve body filler opening or valve body return opening.
8. solenoid directional control valve as claimed in claim 7, it is characterized in that, the latus rectum of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 10mm, and described gap sealed gap length is 0.003-0.006mm.
9. solenoid directional control valve as claimed in claim 7, it is characterized in that, the latus rectum of described valve pocket filler opening, valve pocket actuator port and valve pocket return opening is 20mm, and described gap sealed gap length is 0.005-0.009mm.
10. solenoid directional control valve as claimed in claim 7, it is characterized in that, the two ends shaft shoulder of described spool has balancing slit, and described balancing slit is wide is 0.1 ~ 0.3mm, is 1.0 ~ 1.5mm deeply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420330494.5U CN204042073U (en) | 2014-06-19 | 2014-06-19 | Valve auxiliary structure and solenoid directional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420330494.5U CN204042073U (en) | 2014-06-19 | 2014-06-19 | Valve auxiliary structure and solenoid directional control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204042073U true CN204042073U (en) | 2014-12-24 |
Family
ID=52242741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420330494.5U Expired - Lifetime CN204042073U (en) | 2014-06-19 | 2014-06-19 | Valve auxiliary structure and solenoid directional control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204042073U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151565A (en) * | 2016-06-29 | 2016-11-23 | 安徽环名精控有限公司 | A kind of spool of engine electromagnet control valve |
| WO2017008250A1 (en) * | 2015-07-14 | 2017-01-19 | 广东华液动力科技有限公司 | Method for manufacturing special ceramic, valve pair structure and piston pair |
| CN112555218A (en) * | 2020-12-18 | 2021-03-26 | 涌镇液压机械（上海）有限公司 | Valve body structure of reversing valve |
| CN112747140A (en) * | 2021-01-08 | 2021-05-04 | 涌镇液压机械（上海）有限公司 | Special reversing valve for die adjusting action |
| CN113418023A (en) * | 2021-01-29 | 2021-09-21 | 涌镇液压机械（上海）有限公司 | Reversing valve capable of being switched at high frequency |
-
2014
- 2014-06-19 CN CN201420330494.5U patent/CN204042073U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017008250A1 (en) * | 2015-07-14 | 2017-01-19 | 广东华液动力科技有限公司 | Method for manufacturing special ceramic, valve pair structure and piston pair |
| CN106151565A (en) * | 2016-06-29 | 2016-11-23 | 安徽环名精控有限公司 | A kind of spool of engine electromagnet control valve |
| CN112555218A (en) * | 2020-12-18 | 2021-03-26 | 涌镇液压机械（上海）有限公司 | Valve body structure of reversing valve |
| CN112555218B (en) * | 2020-12-18 | 2024-05-17 | 涌镇液压机械（上海）有限公司 | Valve body structure of reversing valve |
| CN112747140A (en) * | 2021-01-08 | 2021-05-04 | 涌镇液压机械（上海）有限公司 | Special reversing valve for die adjusting action |
| CN113418023A (en) * | 2021-01-29 | 2021-09-21 | 涌镇液压机械（上海）有限公司 | Reversing valve capable of being switched at high frequency |
| CN113418023B (en) * | 2021-01-29 | 2024-05-17 | 涌镇液压机械（上海）有限公司 | Reversing valve capable of being switched at high frequency |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204042073U (en) | Valve auxiliary structure and solenoid directional control valve | |
| CN204592332U (en) | Fluid flow arrangements and the black box for fluid control device | |
| KR100978061B1 (en) | A Cryogenic Valve | |
| CN203940038U (en) | Solenoid directional control valve and valve auxiliary structure | |
| CN103821981B (en) | Pressure type modulating valve in self-powering type | |
| CN104930212A (en) | Novel magnetic control ball valve | |
| CN103291951B (en) | Resistance to erosion is wear-resistant corrosion-resistant middle-high-pressure ceramic ball valve and preparation method thereof | |
| CN104108951B (en) | The preparation method of special pottery, adopts the standby valve auxiliary structure of special ceramic and plunger pair | |
| CN204704018U (en) | Cylinder liner | |
| CN101813211B (en) | Variable flow solenoid valve | |
| CN202065501U (en) | Pneumatic three-way cut-off valve | |
| CN103644316B (en) | A kind of self cooling hot-resistant valve | |
| CN103697195A (en) | Novel high-temperature high-pressure cold and hot fluid transient switching four-way valve | |
| CN208221716U (en) | Modified form clears up exhaust valve | |
| CN104632316A (en) | Engine valve guide pipe and assembly | |
| CN102927291A (en) | Ultrahigh-temperature solenoid valve | |
| CN101235901A (en) | Alkali-chloride special-purpose fluoroplastic all-liner butterfly valve | |
| CN202017767U (en) | Ceramic hard seal stop valve | |
| CN107532730A (en) | Regulating valve for regulating a fluid flow | |
| CN201916509U (en) | Regulating valve with high-differential pressure low-leakage valve core | |
| CN203477415U (en) | Top-entry type ball valve | |
| CN105351559A (en) | Manual electric heating ball valve | |
| CN106885007A (en) | The hard sealing high-temp. ball valve of bellows | |
| CN202597317U (en) | Ceramic hydraulic valve | |
| CN212928806U (en) | Valve core structure of micro flow regulating valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141224 |