CN104676045B - A kind of aqueous medium two-bit triplet reversal valve - Google Patents
A kind of aqueous medium two-bit triplet reversal valve Download PDFInfo
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- CN104676045B CN104676045B CN201510106612.3A CN201510106612A CN104676045B CN 104676045 B CN104676045 B CN 104676045B CN 201510106612 A CN201510106612 A CN 201510106612A CN 104676045 B CN104676045 B CN 104676045B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
- Lift Valve (AREA)
Abstract
The present invention discloses a kind of aqueous medium two-bit triplet reversal valve, including valve body and valve element, the valve body left and right sides is fixed with left sheath and right sheath, corrosion-resistant bushing is provided between valve body and valve element, left sheath is connected with the position adjustments positioner that right-hand member is offseted with corrosion-resistant bushing high order end, valve element is connected with unidirectional driving mechanism, valve element outer wall is provided with valve element annular groove, valve body and corrosion-resistant liner outer wall are provided with the first outlet and the second outlet, valve body and corrosion-resistant liner outer wall are provided with the 3rd outlet, valve element annular groove length is corresponding with axial distance between the first outlet and the second outlet and the 3rd outlet, first outlet and the first actuator connection, second outlet is connected with the second actuator, 3rd outlet is connected with kinetic pump.Aqueous medium two-bit triplet structure of reversing valve of the present invention is simple, frequently can be spaced without barrier and execute structures to two and provide high pressure aqueous mediums, effectively save cost, save resources and valve element side-to-side movement is accessible.
Description
Technical field
The present invention relates to a kind of reversal valve, the aqueous medium two of more particularly to a kind of hydraulic system with water as power fluid
Three-way diverter valve.
Background technology
At present, in some special operation conditions, the hydraulic system with water as power fluid is needed.Such as oil extraction in oil field production process
In, hydraulic drive Rodless oil extraction equipment, due to underground hydraulic pressure cylinder working during, power fluid is constantly missed, be cost-effective, need
Will be with water as power fluid.But in the actual course of work, typically all high-pressure hydraulic pump supplies water to an actuator, if
Liang Ge mechanisms need then to need another high-pressure hydraulic pump, high cost is separately configured with water, and honor causes the wasting of resources.
Content of the invention
The present invention is completed to solve of the prior art not enough, it is an object of the invention to provide a kind of structure is simple
Single, frequently can be spaced without barrier and execute structures to two high pressure aqueous mediums are provided, effectively save cost, save resources and
The clog-free aqueous medium two-bit triplet reversal valve of valve element side-to-side movement.
A kind of aqueous medium two-bit triplet reversal valve of the present invention, including valve body and the valve from valve body central authorities hermetically passing
Core, removable seal is fixed with left sheath and right sheath, the valve interior wall and the valve respectively for the left and right sides of the valve body
Corrosion-resistant bushing is provided between core, and the left sheath left part is connected with position adjustments positioner, the position adjustments positioning
Device right-hand member is offseted with corrosion-resistant bushing high order end, and the valve element low order end is connected with unidirectional driving mechanism, the valve element outer wall
On be provided with valve element annular groove, on the valve body and the corrosion-resistant liner outer wall side, position is accordingly arranged from left to right respectively
Have on the first outlet and the second outlet, the valve body and the corrosion-resistant liner outer wall opposite side and distinguish position accordingly
It is provided with the 3rd outlet, axial distance and second between the valve element annular groove length and the first outlet and the 3rd outlet
Between outlet and the 3rd outlet, axial distance is corresponding, and first outlet and the first actuator connect, and described second
Outlet is connected with the second actuator, and the 3rd outlet is connected with kinetic pump.
A kind of aqueous medium two-bit triplet reversal valve of the present invention can also be：
The position adjustments positioner includes bushing locating ring and apparatus for adjusting position, the bushing locating ring low order end
Offset with the corrosion-resistant bushing high order end, the position adjustments positioner is connected with the left sheath removable seal, institute
State bushing locating ring high order end to offset with the apparatus for adjusting position.
The apparatus for adjusting position is bushing clamp nut, and the bushing clamp nut is threadedly coupled with the left sheath.
Left oiling check valve and right oiling check valve, the left note is respectively arranged with the left sheath and the right sheath
The bottom of oily check valve and the right oiling check valve respectively with the left sheath and the inner space of the right sheath.
Left leak dehydration mouth and right leak dehydration mouth is respectively arranged with the left sheath and the right sheath.
The left sheath, the right sheath are detachably solid by least three sets studs and fixing nut with the valve body
Fixed, the studs is each passed through the left sheath, the valve body and the right sheath, the fixing nut spiral shell from left to right
Stricture of vagina is connected to the two ends of the studs.
At least two sealing rings are provided between the corrosion-resistant liner outer wall and the valve interior wall, and the sealing ring is extremely
The valve body two ends are arranged at less.
Sealing ring is provided between the left sheath and the right sheath and the corrosion-resistant liner outer wall, the sealing ring
Side offset with the valve body.
It is provided between first outlet and second outlet for detecting the pressure tap of pressure in valve body.
A kind of aqueous medium two-bit triplet reversal valve of the present invention, including valve body and the valve from valve body central authorities hermetically passing
Core, removable seal is fixed with left sheath and right sheath, the valve interior wall and the valve respectively for the left and right sides of the valve body
Corrosion-resistant bushing is provided between core, and the left sheath left part is connected with position adjustments positioner, the position adjustments positioning
Device right-hand member is offseted with corrosion-resistant bushing high order end, and the valve element low order end is connected with unidirectional driving mechanism, the valve element outer wall
On be provided with valve element annular groove, on the valve body and the corrosion-resistant liner outer wall side, position is accordingly arranged from left to right respectively
Have on the first outlet and the second outlet, the valve body and the corrosion-resistant liner outer wall opposite side and distinguish position accordingly
It is provided with the 3rd outlet, axial distance and second between the valve element annular groove length and the first outlet and the 3rd outlet
Between outlet and the 3rd outlet, axial distance is corresponding, and first outlet and the first actuator connect, and described second
Outlet is connected with the second actuator, and the 3rd outlet is connected with kinetic pump.When so using, position adjustments positioning dress
The position adjustment that puts by corrosion-resistant bushing in valve body is good so that the first outlet, the second outlet on corrosion-resistant bushing and
3rd outlet respectively with valve body on the first outlet, the second outlet and the 3rd outlet correspond, convenient follow-up
Para-position.Then starting unidirectional driving mechanism drives valve element to be moved to the left, when valve core movement in place after, the Far Left of valve element annular groove
Just it is connected with the first outlet and the 3rd outlet with rightmost, forms the first exhalant canal, it is ensured that be connected with kinetic pump
The 3rd outlet in high-pressure medium water can from the first outlet enter the first actuator the first actuator is supplied water,
Unidirectional driving mechanism drives valve element to move right afterwards, and the space of the first outlet and the 3rd outlet diminishes, and first goes out
Cut off the water supply by valve element closed front, therefore the first actuator at the mouth of a river.Continue to move right, until the second outlet and the 3rd water outlet
Mouth is connected with valve element annular groove, so forms the second exhalant canal, it is ensured that the high pressure in the 3rd outlet being connected with kinetic pump
WATER AS FLOW MEDIUM can enter the second actuator from the second outlet and the second actuator is supplied water, and then start unidirectional driving mechanism
Drive valve element to be moved to the left, enter back into the state supplied water by the first actuator, so in the driving effect of unidirectional driving mechanism
Under, can frequently change without barrier and the first actuator or the second actuator are supplied water.Commutation water supply accessibility is realized,
Cost is saved simultaneously, because extra again kinetic pump and pipeline, effective save resources need not individually be prepared.Relative to existing skill
This have the advantage that for art：Simple structure, frequently can be spaced without barrier to two execute structures provide high pressure aqueous mediums,
Effectively save cost, save resources and valve element side-to-side movement is clog-free.
Description of the drawings
Fig. 1 aqueous medium two-bit triplet reversing valve embodiment front views of the present invention.
A-A sectional views in Fig. 2 aqueous medium two-bit triplet reversing valve embodiment Fig. 1 of the present invention.
The horizontal semi-cutaway of the left commutation of Fig. 3 aqueous medium two-bit triplet reversing valve embodiments of the present invention.
The horizontal semi-cutaway of the right commutation of Fig. 4 aqueous medium two-bit triplet reversing valve embodiments of the present invention.
Fig. 5 aqueous medium two-bit triplet reversing valve embodiment application schematic diagrams of the present invention.
Fig. 6 aqueous medium two-bit triplet reversing valve embodiment Another Application schematic diagrams of the present invention.
Figure number explanation
The right oiling check valve of the right sheath 3 ... of 1 ... valve element 2 ...
4 ... the left sheaths of corrosion-resistant bushing 5 ... valve body 6 ...
7 ... left oiling check valve 8 ... bushing locating ring 9 ... bushing clamp nuts
Right the first outlet of shoe cream room 12 ... of 10 ... left shoe cream rooms 11 ...
The 3rd outlet 15 ... pressure tap of 13 ... second outlet 14 ...
16 ... left leakage water outs 17 ... are right to miss water out 18 ... studs
19 ... fixing nut 20 ... sealing ring 21 ... valve element annular grooves
22 ... first the second actuator of actuator 23 ... 24 ... kinetic pumps
25 ... unidirectional driving mechanisms
Specific embodiment
Fig. 1 to Fig. 6 below in conjunction with the accompanying drawings makees further in detail to a kind of aqueous medium two-bit triplet reversal valve of the present invention
Explanation.
A kind of aqueous medium two-bit triplet reversal valve of the present invention, refer to Fig. 1 to Fig. 6, including valve body 5 and from the valve body
The valve element 1 of 5 central hermetically passings, removable seal is fixed with left sheath 6 and right sheath 2 respectively for the left and right sides of the valve body 5,
Corrosion-resistant bushing 4 is provided between 5 inwall of the valve body and the valve element 1, and it is fixed that 6 left part of left sheath is connected with position adjustments
Position device, the position adjustments positioner right-hand member offseted with 4 high order end of corrosion-resistant bushing, 1 low order end of the valve element and commutation
Drive mechanism 25 connects, and is provided with valve element annular groove 21, the valve body 5 and 4 outer wall of corrosion-resistant bushing on 1 outer wall of the valve element
On side, position is accordingly provided with the first outlet 12 and the second outlet 13 from left to right respectively, the valve body 5 and described
On 4 outer wall opposite side of corrosion-resistant bushing, position is correspondingly provided with the 3rd outlet 14,21 length of valve element annular groove respectively
The countershaft of axial distance and the second outlet 13 and the 3rd outlet 14 between the first outlet 12 and the 3rd outlet 14
Correspond to distance, first outlet 12 and the first actuator 22 connect, second outlet 13 and second executes machine
Structure 23 is connected, and the 3rd outlet 14 is connected with kinetic pump 4.When so using, position adjustments positioner is by corrosion-resistant lining
Set 4 is good in the position adjustment in valve body 5 so that the first outlet 12, the second outlet 13 and the 3rd on corrosion-resistant bushing 4 goes out
The mouth of a river 14 respectively with valve body 5 on the first outlet 12, the second outlet 13 and the 3rd outlet 14 correspond, convenient after
Continuous para-position.Then starting unidirectional driving mechanism 25 drives valve element 1 to be moved to the left, after valve element 1 is moved in place, valve element annular groove 21
Far Left be just connected with the first outlet 12 and the 3rd outlet 14 with rightmost, formed the first exhalant canal, it is ensured that
The high-pressure medium water in the 3rd outlet 14 being connected with kinetic pump 4 can enter the first actuator 22 from the first outlet 12
First actuator 22 is supplied water, unidirectional driving mechanism 25 drives valve element 1 to move right afterwards, and the first outlet 12 and the 3rd goes out
The space at the mouth of a river 14 diminishes, and the first outlet 12, by 1 closed front of valve element, therefore the first actuator 22 is cut off the water supply.Continue
Move right, until the second outlet 13 is connected with valve element annular groove 21 with the 3rd outlet 14, so form the second water outlet and lead to
Road, it is ensured that the high-pressure medium water in the 3rd outlet 14 being connected with kinetic pump 4 can be entered second from the second outlet 13 and be held
23 pairs of the second actuators 23 of row mechanism are supplied water, and then start unidirectional driving mechanism 25 and drive valve element 1 to be moved to the left, and it is right to enter back into
The state that first actuator 22 is supplied water, so under the driving effect of unidirectional driving mechanism 25, can without barrier frequently more
Change and the first actuator 22 or the second actuator 23 are supplied water.Commutation water supply accessibility is realized, while cost is saved, because
For extra again need not individually prepare kinetic pump 4 and pipeline, effective save resources.Have the advantage that in terms of existing technologies
It is：Simple structure, frequently can be spaced without barrier to two execute structures provide high pressure aqueous mediums, effectively save cost, section
Resource-saving and 1 side-to-side movement of valve element is clog-free.
A kind of aqueous medium two-bit triplet reversal valve of the present invention, refer to Fig. 1 to Fig. 6, in previously described technical scheme
On the basis of can also be：The position adjustments positioner includes bushing locating ring 8 and apparatus for adjusting position, and the bushing is fixed
Position 8 low order end of ring is offseted with 4 high order end of corrosion-resistant bushing, and the position adjustments positioner is removable with the left sheath 6
Unload and be tightly connected, 8 high order end of bushing locating ring is offseted with the apparatus for adjusting position.So, bushing locating ring 8 and corrosion resistant
Erosion 4 high order end of bushing offsets, i.e., position corrosion-resistant bushing 4 by bushing locating ring 8 so that first on corrosion-resistant bushing 4
Outlet 12, the second outlet 13 and the 3rd outlet 14 respectively with valve body 5 on the first outlet 12, the second outlet 13 and
On 3rd outlet 14 is corresponded.And apparatus for adjusting position is then used for the position for adjusting bushing locating ring 8, and then adjust corrosion resistant
The position of erosion bushing 4, the actuator supply aqueous medium for facilitating para-position and commutation different backward.Further preferred technical scheme
It is bushing clamp nut 9 for the apparatus for adjusting position, the bushing clamp nut 9 is threadedly coupled with the left sheath 6.This
Sample, when 8 position of bushing locating ring keep left or keep right deviation valve body 5 when, bushing clamp nut 9, makes clockwise or counterclockwise
Bushing clamp nut 9 and the connection distance of the left sheath 6 away from or close, as left sheath 6 and valve body 5 are fixed, because
This so that bushing locating ring 8 is moved to valve body 5 or is moved away from valve body 5, and then realizes the regulation to corrosion-resistant bushing 4.
A kind of aqueous medium two-bit triplet reversal valve of the present invention, refer to Fig. 1 to Fig. 6, in previously described technical scheme
On the basis of can also be：Left oiling check valve 7 and right oiling list is respectively arranged with the left sheath 6 and the right sheath 2
To valve 3, the bottom of the left oiling check valve 7 and the right oiling check valve respectively with the left sheath 6 and the right sheath
Inner space.When unidirectional driving mechanism 25 is with 1 bilateral reciprocation commutation work of movable valve plug, right 3 bottom of oiling check valve
The right shoe cream room 11 that formed between right sheath 2, between left 7 bottom of oiling check valve and left sheath 6, left shoe cream room 10 is formed, left
Lubricating oil viscosity in shoe cream room 10 and right shoe cream room 11 is attached to 1 surface of valve element, realizes oil lubrication, reach wear-resistant, life-span length
Effect.Certainly right oiling check valve 3 and left oiling check valve 7, during for maintaining at ordinary times, periodically shoe cream room 11 and left oil storage to the right
Injection lubricating oil in chamber 10, reaches wear-resisting and extends life-span effect, due to lubricating oil density ratio water little, therefore right shoe cream room 11,
In left shoe cream room 10, lubricating oil floats on the portion waterborne that the very little axis hole gap of valve element 1 and corrosion-resistant bushing 4 leaks out.
Can also be and on the left sheath 6 and the right sheath 2, be respectively arranged with left leak dehydration mouth and right leak dehydration mouth.Due to water
Medium two-bit triplet reversal valve, by the very little axis hole gap of valve element 1 and corrosion-resistant bushing 4, realizes sealing, corrosion-resistant lining
Covering 4 two ends necessarily has certain seepage.Percolating water returns to power fluid water by left leakage water out 16, right leakage water out 17
Case save resources and avoid interior leakage.
A kind of aqueous medium two-bit triplet reversal valve of the present invention, refer to Fig. 1 to Fig. 6, in previously described technical scheme
On the basis of can also be：The left sheath 6, the right sheath 2 and are consolidated by least three sets studs 18 with the valve body 5
Determine nut 19 to be detachably fixed, the studs 18 is each passed through the left sheath 6, the valve body 5 and described from left to right
Right sheath 2, the fixing nut 19 are threadedly connected to the two ends of the studs 18.So can be by left sheath 6 and right shield
Set 2 is securely seated between on valve body 5, it is ensured that the first outlet 12,13 and of the second outlet on valve body 5 and corrosion-resistant bushing 4
3rd outlet 14 and 21 para-position of valve element annular groove accurately, are easily and efficiently supplied water to two actuators.Can also be described resistance to
Be provided with least two sealing rings 20 between corrosion 5 inwall of 4 outer wall of bushing and the valve body, the sealing ring 20 at least provided with
5 two ends of the valve body.Can so ensure that the sealing between corrosion-resistant bushing 4 and valve body 5 is relatively good, it is to avoid aqueous medium occur and enter
Enter the situation in valve body 5.Can also be
There are sealing ring 20, the side of the sealing ring 20 to offset with the valve body 5.Left sheath 6 and right sheath 2 and valve can so be realized
Connection between 4 three of body 5 and corrosion-resistant bushing is and is tightly connected.Can also be that first outlet and described second goes out
It is provided between the mouth of a river for detecting the pressure tap 15 of pressure in valve body 5.Pressure tap 15 is the pressure being convenient for measuring in valve body 5,
Avoid dangerous operation.
Above-mentioned only to the present invention in several specific embodiments be illustrated, but can not as the present invention protection model
Enclose, the equivalence changes or modification or equal proportion done by every design spirit according in the present invention are zoomed in or out, all should
Think to fall into protection scope of the present invention.
Claims (8)
1. a kind of aqueous medium two-bit triplet reversal valve, it is characterised in that：Including valve body and from valve body central authorities hermetically passing
Valve element, removable seal is fixed with left sheath and right sheath respectively for the left and right sides of the valve body, the valve interior wall with described
Corrosion-resistant bushing is provided between valve element, and the left sheath left part is connected with position adjustments positioner, and the position adjustments are fixed
Position device right-hand member is offseted with corrosion-resistant bushing high order end, and the valve element low order end is connected with unidirectional driving mechanism, outside the valve element
Valve element annular groove is provided with wall, and on the valve body and the corrosion-resistant liner outer wall side, position accordingly sets from left to right respectively
The first outlet and the second outlet is equipped with, position is corresponding respectively with the corrosion-resistant liner outer wall opposite side for the valve body
Be provided with the 3rd outlet, axial distance and between the valve element annular groove length and the first outlet and the 3rd outlet
Between two outlets and the 3rd outlet, axial distance is corresponding, first outlet and the first actuator connection, and described the
Two outlets are connected with the second actuator, and the 3rd outlet is connected with kinetic pump, the position adjustments positioner bag
Bushing locating ring and apparatus for adjusting position is included, the bushing locating ring low order end is offseted with the corrosion-resistant bushing high order end, institute
Rheme is put regulating positioning device and is connected with the left sheath removable seal, and the bushing locating ring high order end is adjusted with the position
Regulating device offsets.
2. a kind of aqueous medium two-bit triplet reversal valve according to claim 1, it is characterised in that：The apparatus for adjusting position
For bushing clamp nut, the bushing clamp nut is threadedly coupled with the left sheath.
3. a kind of aqueous medium two-bit triplet reversal valve according to claim 1 and 2, it is characterised in that：The left sheath and
Left oiling check valve and right oiling check valve, the left oiling check valve and the right oiling is respectively arranged with the right sheath
The bottom of check valve respectively with the left sheath and the inner space of the right sheath.
4. a kind of aqueous medium two-bit triplet reversal valve according to claim 1 and 2, it is characterised in that：The left sheath and
Left leak dehydration mouth and right leak dehydration mouth is respectively arranged with the right sheath.
5. a kind of aqueous medium two-bit triplet reversal valve according to claim 1 and 2, it is characterised in that：The left sheath, institute
State right sheath to be detachably fixed by least three sets studs and fixing nut with the valve body, the studs by left extremely
The right side is each passed through the left sheath, the valve body and the right sheath, and the fixing nut is threadedly connected to the studs
Two ends.
6. a kind of aqueous medium two-bit triplet reversal valve according to claim 1 and 2, it is characterised in that：The corrosion-resistant lining
At least two sealing rings are provided between set outer wall and the valve interior wall, the sealing ring is at least provided with the valve body two
End.
7. a kind of aqueous medium two-bit triplet reversal valve according to claim 1 and 2, it is characterised in that：The left sheath and
Sealing ring, the side of the sealing ring and the valve body phase is provided between the right sheath and the corrosion-resistant liner outer wall
Support.
8. a kind of aqueous medium two-bit triplet reversal valve according to claim 1 and 2, it is characterised in that：First water outlet
Mouthful it is provided with and second outlet between for detecting the pressure tap of pressure in valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510106612.3A CN104676045B (en) | 2015-03-11 | 2015-03-11 | A kind of aqueous medium two-bit triplet reversal valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510106612.3A CN104676045B (en) | 2015-03-11 | 2015-03-11 | A kind of aqueous medium two-bit triplet reversal valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104676045A CN104676045A (en) | 2015-06-03 |
| CN104676045B true CN104676045B (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510106612.3A Active CN104676045B (en) | 2015-03-11 | 2015-03-11 | A kind of aqueous medium two-bit triplet reversal valve |
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| CN (1) | CN104676045B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099188B (en) * | 2018-10-03 | 2020-05-15 | 盐城欧润石化设备制造有限公司 | Two-position three-way valve |
| CN111981735B (en) * | 2019-05-24 | 2022-09-23 | 青岛海尔电冰箱有限公司 | Ice water distribution device and refrigerator with same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3246665A (en) * | 1963-04-24 | 1966-04-19 | Fessler Machine Company | Lubricated three way fluid valve |
| DK0802357T3 (en) * | 1996-04-15 | 2000-05-01 | Wortsilo Nsd Schweiz Ag | Electromagnetic valve |
| CN202252115U (en) * | 2011-09-28 | 2012-05-30 | 渑池乾元过滤设备有限公司 | Three-way changeover valve device |
| CN203442213U (en) * | 2013-07-30 | 2014-02-19 | 毛孟其 | Two-position three-way button valve |
| CN203836279U (en) * | 2014-03-19 | 2014-09-17 | 徐工集团工程机械股份有限公司 | Built-in pressure reducing valve |
| CN204828778U (en) * | 2015-03-11 | 2015-12-02 | 北京双良石油技术有限公司 | Two tee bend switching -over valves of aqueous medium |
-
2015
- 2015-03-11 CN CN201510106612.3A patent/CN104676045B/en active Active
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| CN104676045A (en) | 2015-06-03 |
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Effective date of registration: 20161101 Address after: 100176 Beijing economic and Technological Development Zone, Daxing District Hongda Road, No. 2, layer 16, layer Applicant after: BEIJING PETRODAMO ENGINEERING TECHNOLOGY CO., LTD. Address before: 100095 Beijing city Haidian District P.Tricuspidata Road No. 9 Building No. 6 hospital Applicant before: Beijing Shuan Liang Petrotechnik Ltd. |
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