CN208605630U - A kind of priming valve - Google Patents
A kind of priming valve Download PDFInfo
- Publication number
- CN208605630U CN208605630U CN201820423749.0U CN201820423749U CN208605630U CN 208605630 U CN208605630 U CN 208605630U CN 201820423749 U CN201820423749 U CN 201820423749U CN 208605630 U CN208605630 U CN 208605630U
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- chamber
- valve
- valve seat
- mandril
- sealing
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- 230000037452 priming Effects 0.000 title claims abstract description 48
- 238000009434 installation Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 72
- 210000004907 gland Anatomy 0.000 claims description 17
- 239000007769 metal material Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 27
- 239000010720 hydraulic oil Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 210000000664 rectum Anatomy 0.000 description 4
- 210000001624 hip Anatomy 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model discloses a kind of priming valve, including valve body, the both ends of valve body are respectively arranged with oil inlet and oil outlet, axially disposed in valve body to have the installation cavity being connected to the oil inlet, oil outlet, are provided with valve seat in installation cavity；The installation cavity includes the lock chamber, seal chamber and diversion cavity being sequentially coaxially arranged, wherein: the rear end of the valve seat is fixed in lock chamber, the front end of valve seat is extend into the diversion cavity, and valve seat passes through the seal chamber and is interference fitted with seal chamber；Mandril is provided with across the valve seat is movable, and the front end of mandril is protruded into the diversion cavity and is equipped with spool；It is clearance fit between the mandril and valve seat.The priming valve of the utility model uses twice redundant seal structure, ensure that the closed reliability of priming valve；The utility model is compact-sized, small in size, and working life number is high, can effectively meet the use demand of electro-hydraulic actuator.
Description
Technical field
The utility model relates to a kind of priming valves, and in particular to a kind of hydraulic-oil filling for hydraulic system and release
Control valve.
Background technique
Intelligent electro-hydraulic actuator is widely used in the driving and control of various valves, together as a kind of power device
When more applied and need power-actuated position substantially any.The production domesticization research of intelligent electro-hydraulic actuator proposes newly
Priming valve demand, it is desirable that the priming valve have the function of fill and release hydraulic oil, small in size, sealed reliable, and work time
Number is high.
However existing priming valve is under the premise of guaranteeing sealed reliable, work times generally only tens times, and volume is larger,
It is not able to satisfy the requirement of intelligent electro-hydraulic actuator installation space.
Summary of the invention
The purpose of the utility model is to provide a kind of priming valves compact-sized, small in size, sealed reliable and service life are long, use
In the hydraulic-oil filling of hydraulic system on electro-hydraulic actuator with release.
In order to realize above-mentioned task, the utility model uses following technical scheme:
A kind of priming valve, including valve body, the both ends of valve body are respectively arranged with oil inlet and oil outlet, set in valve body along axial direction
It is equipped with the installation cavity being connected to the oil inlet, oil outlet, is provided with valve seat in installation cavity；The installation cavity includes successively same
Lock chamber, seal chamber and the diversion cavity of axis setting, in which: the rear end of the valve seat is fixed in lock chamber, before valve seat
End is extend into the diversion cavity, and valve seat passes through the seal chamber and is interference fitted with seal chamber；Across the valve seat
Movable to be provided with mandril, the front end of mandril is protruded into the diversion cavity and is equipped with spool；The mandril and valve seat it
Between be clearance fit.
Further, the valve seat is axially inside provided with sliding chamber, and one end of sliding chamber is pierced by the rear end of the valve seat,
It offers and is connected to the sliding chamber and diameter is less than the oil-through hole of sliding chamber in the front end of the valve seat；The mandril passes through sliding chamber
And oil-through hole, spring is set on mandril, and one end of spring is connected on the snap ring being set on mandril, and the other end of spring connects
It connects in the front end of the sliding chamber；When mandril is not by external force, the spool and valve seat Elastic Contact, priming valve, which is in, at this time is closed
State.
Further, the valve seat front end is provided with the sealing station of annular, the thickness edge of sealing station on along the circumferential direction
Direction far from valve seat is gradually reduced, and makes the axial cross section of sealing station in isosceles trapezoidal structure；Be provided on the spool with
The sealing block of the sealing station cooperation, wherein sealant is provided on the front end face of the sealing station, the sealing station is
Metal material, and sealant, sealing block are non-metallic material.
Further, the spool includes circular core and the core cap for being connected to core side, the core
On offer the lock hole extended in core cap, the front end of the mandril is threadedly engaged with lock hole to be connect.
Further, the seal groove of annular is offered on the spool, the sealing block is set in seal groove；Institute
It is small and interior big outside the diameter for the seal groove stated, make the cross section of seal groove in isosceles trapezoidal structure；Positioned at the sealing trench bottom
And the sealing thorn slot of taper is provided on the side wall of seal groove.
Further, the installation cavity further includes the limit chamber being arranged between lock chamber and seal chamber, limit chamber
Diameter is greater than the diameter of the seal chamber but is less than the diameter of lock chamber；It is provided on the valve seat outer wall and the limit chamber
The chuck of cooperation offers seal groove in chuck, is provided with sealing ring in seal groove.
Further, gland is removably equipped in the lock chamber, gland is internally provided with card chamber, and card chamber is worn
The front end of gland out is provided with the oil guiding hole being connected to card chamber in the rear end of gland；The mandril passes through oil guiding hole；The card
Step groove is provided on the inner wall of chamber, the rear end of the valve seat is stuck in step groove；Between the outer wall and lock chamber of the gland
Interference fit.
Further, the valve rear end is detachably provided with the blocking cap for sealed valve body rear end, valve rear end with
Rubber pad is provided between bottom surface.
Further, the spool is 2.5MPa to 3MPa relative to the range of the sealing pressure ratio q of valve seat.
The utility model has following technical characterstic compared with prior art:
1. in the priming valve of the utility model, spool and valve seat form first road sealing, and rubber pad and blocking cap form second
Sealing, using this twice redundant seal structure, ensure that the sealing reliability of priming valve in off position；
2. structure when the utility model is provided with sealing block and trapezoid boss cooperation at spool and valve seat cooperation, use are non-
Metal material is sealed, and ensure that the stability of work, rigid collision when reducing identical improve the use of priming valve
Service life.
3. the priming valve of the utility model is compact-sized, small in size, operating pressure 10Mpa, effective drift diameter 1.5mm, verifying
Working life number is no less than 10000 times, effectively meets the use demand of electro-hydraulic actuator.
Detailed description of the invention
Fig. 1 is the structural schematic diagram under the priming valve of the utility model is in close state；
Fig. 2 is the structural schematic diagram under the priming valve of the utility model is in the open state (after removing blocking cap)；
Fig. 3 is the structural schematic diagram of spool；
Fig. 4 is the structural schematic diagram of spool matrix；
Fig. 5 is the structural schematic diagram of valve seat；
Figure label represents: 1-valve body, 2-spools, 3-mandrils, 4-valve seats, 5-springs, 6-snap rings, 7-rubber
Pad, 8-blocking caps, 9-glands, 10-sealing rings, 11-oil outlets, 12-oil inlets, 13-sealing station, 14-limit chambers,
15-diversion cavities, 16-seal chambers, 17-lock chambers, 18-card chambers, 19-seal grooves, 20-cores, 21-core caps, 22-is close
Seal block, 23-sealing thorn slots, 24-oil-through holes, 25-chuck, 26-sliding chambers, 27-oil guiding holes.
Specific embodiment
As shown in Figures 1 to 5, the utility model discloses a kind of priming valve, including valve body 1, the both ends of valve body 1 are set respectively
It is equipped with oil inlet 12 and oil outlet 11, wherein oil inlet 12 is larger and oil outlet 11 is smaller, and oil inlet 12, oil outlet 11 are coaxial
Setting；It is axially disposed in valve body 1 have with the oil inlet 12, oil outlet 11 is coaxial and the installation cavity that is connected to, in installation cavity
It is provided with valve seat 4, valve seat 4 cooperates for installing mandril 3, while with spool 2 to realize sealing function.
The installation cavity is round interim variable diameter cavity, including lock chamber 17, the seal chamber 16 being sequentially coaxially arranged
And diversion cavity 15, as shown in Figure 1, wherein lock chamber 17 is connect with oil inlet 12, and diversion cavity 15 is connect with oil outlet 11；Gu
Determine chamber 17 and the size of oil inlet 12 is similar, the diameter of diversion cavity 15 is greater than 11 diameter of oil outlet.
Wherein: the rear end of the valve seat 4 is fixed in lock chamber 17, and the front end of valve seat 4 extend into the diversion cavity
In 15, valve seat 4 passes through the seal chamber 16 and is interference fitted with seal chamber 16；It is provided with across the valve seat 4 is movable
Mandril 3, the front end of mandril 3 are protruded into the diversion cavity 15 and are equipped with spool 2；Mandril 3 uses the mounting means of elasticity, when
When pushing mandril 3 forward, spool 2 can be separated with 4 front end of valve seat, to establish the flow passage of hydraulic oil；The mandril 3 and valve
Be clearance fit between seat 4, after path setting, hydraulic oil enters in valve seat 4 from oil inlet 12, from valve seat 4 and mandril 3 it
Between gap flow through, the gap between spool 2 and valve seat 4 is flowed into diversion cavity 15, then from oil outlet 11 flow out, with carry out
It refuels.After oiling, mandril 3 resets, and end in contact seals before spool 2 and valve seat 4, and access disconnects.
As shown in figure 5, sliding chamber 26 is sizing chamber in the present solution, the valve seat 4 is axially inside provided with sliding chamber 26
One end of body, sliding chamber 26 is pierced by the rear end of the valve seat 4, i.e. the rear end of valve seat 4 is penetrating, offers in the front end of the valve seat 4
It is connected to the sliding chamber 26 and diameter is less than the oil-through hole 24 for sliding chamber 26；The mandril 3 passes through sliding chamber 26 and oil-through hole 24, mistake
There are gaps between oilhole 24 and mandril 3；Spring 5 is set on mandril 3, one end of spring 5 is connected to suit and is fixed on mandril 3
On snap ring 6 on, the other end of spring 5 is connected to the front end of the sliding chamber 26；When mandril 3 is not by external force, in the effect of spring 5
Under, the spool 2 and 4 Elastic Contact of valve seat, priming valve is in close state at this time；And when pushing mandril 3 forward, spring 5
Compression, spool 2 and 4 relative separation of valve seat, priming valve are opened.
As depicted in figs. 1 and 2, the installation cavity further includes the limit chamber being arranged between lock chamber 17 and seal chamber 16
14, the diameter of limit chamber 14 is greater than the diameter of the seal chamber 16 but is less than the diameter of lock chamber 17；On 4 outer wall of valve seat
It is provided with the chuck 25 with the limit chamber 14 cooperation, 10 slot of sealing ring is offered in chuck 25, is provided in 10 slot of sealing ring
Sealing ring 10.
In order to realize high leakproofness and high service life, 4 front end of valve seat is provided with annular on along the circumferential direction
The thickness of sealing station 13, sealing station 13 is gradually reduced along the direction far from valve seat 4, makes the axial cross section of sealing station 13 in isosceles ladder
Shape structure, as shown in Figure 5；The sealing block 22 with the sealing station 13 cooperation is provided on the spool 2, wherein described
The front end face of sealing station 13 is plane, is provided with planar sealant, the sealing station 13 on the front end face of sealing station 13
For metal material, and sealant, sealing block 22 are non-metallic material, and non-metallic material can for example use rigid plastics.Metal
The sealing station 13 of material ensure that the stability of priming valve work, while improve service life；And the sealing of non-metallic material
Layer can guarantee leakproofness when coincideing with the sealing station 13 of metal material, while reduce rigid when being tightly connected with spool 2
Property collision, improve the service life of priming valve.In order to guarantee the seal pressure of spool 2 and valve seat 4, inventor is to sealing station 13
Structure carried out the optimization of more wheels and multi-scheme experimental verification, final to determine sealing station 13 using the above structure, i.e. axial cross section
For isosceles trapezoid.Angle α between two waists of isosceles trapezoid is preferably 60 °, and the width of 13 front end face of sealing station (seals
The thickness of platform 13 radially) S is preferably 0.1mm, as shown in Figure 5.
The first seal structures that valve seat 4 and spool 2 form are most important to the leakproofness of priming valve and service life, sealing pressure ratio
It is the important design parameter for determining sealing performance, by inventor's experimental verification, spool 2 is full relative to the sealing pressure ratio q of valve seat 4
Foot formula:
In above formula, q is the seal pressure of the road priming valve head sealing, according to the utility model product actual tests as a result, close
For envelope than pressure q when 2.5MPa is between 3MPa, either leakproofness or operating life is relatively good；P1It is negative for the installation of spring 5
Lotus；DkFor 4 sealed diameter of valve seat；pfFor reverse media sealed pressure；S is the width of 4 sealing surface of valve seat；H is to act in spring 5
When lower valve base 4 and spool 2 contact, valve seat 4 is pressed into the depth of cup of sealing block 22 on spool 2；T is sealing station 13 along 4 axis of valve seat
To length, g is acceleration of gravity, and α is the angle of two waists in the sealing station 13 of the trapezium structure.
The structure of spool 2 is as shown in figure 3, the spool 2 includes circular core 20 and is connected to core in this programme
The core cap 21 of 20 side of body offers the lock hole extended in core cap 21, the front end of the mandril 3 on the core 20
It is threadedly engaged and connect with lock hole.20 end face of core of the spool 2 is plane, and annular is offered on 20 end face of core
Seal groove 19, as shown in figure 3, for being set in seal groove 19 with the sealing block 22 of the sealing station 13 cooperation；Described is close
It is small and interior big outside the diameter of sealing groove 19, make the cross section of seal groove 19 in isosceles trapezoidal structure, the waist of isosceles trapezoid is relative to core
Angle between 20 axial direction of body is 12 °；Taper is provided on the side wall of 19 bottom of seal groove and seal groove 19
Sealing pierce slot 23, sealing thorn slot 23 angle of taper be 60 °, and seal thorn slot 23 depth be 0.3mm, as shown in Figure 4.This
In utility model, nonmetallic sealing block 22 is fixed on the seal groove 19 by way of cold-press process and machining
In, 23 structure of slot is pierced in the sealing provided with outer small interior big seal groove 19 and taper, it is ensured that sealing block 22 is in seal groove
Stability in 19, it is ensured that sealing block 22 is not fallen off under high pressure operations.
As shown in Figure 1, being removably equipped with gland 9 in the lock chamber 17, gland 9 is internally provided with card chamber
18, card chamber 18 is pierced by the front end of gland 9, and the oil guiding hole 27 being connected to card chamber 18 is provided in the rear end of gland 9；The mandril
3 pass through oil guiding hole 27, and there are gaps between mandril 3 and oil guiding hole 27；The generally variable diameter bar of mandril 3, mid diameter is larger, and two
Hold diameter smaller；Step groove is provided on the inner wall of the card chamber 18, the rear end of the valve seat 4 is stuck in step groove, to pass through
Gland 9 is packaged 4 rear end of valve seat；It is interference fitted between the outer wall and lock chamber 17 of the gland 9, by gland 9 by valve
Seat 4 is fixed in valve body 1.Removably (such as the connection type being threadedly engaged can be used) setting is useful for 1 rear end of valve body
Blocking cap 8 in 1 rear end of sealed valve body is provided with rubber pad 7 between 1 rear end of valve body and bottom surface.
As shown in Fig. 2, under the state, liquid can be carried out by priming valve for the opening state of the utility model priming valve
The filling of pressure oil is released.When needing to fill, first blocking cap 8 and rubber pad 7 are removed, then connected with charging tooling and priming valve
It connects, tooling opens mandril 3 in connection procedure, and spool 2 and valve seat 4 separate at this time；Spool 2 and the isolated opening size of valve seat 4
Determine priming valve equivalent latus rectum Dn, the equivalent latus rectum of priming valve need to meet the design requirement of oiling rate.The equivalent of priming valve
Latus rectum need to meet following formula:
Wherein: DnFor the equivalent latus rectum of priming valve, G0For the mass flow of priming valve；ρ is the density of working media；V0For
The flow velocity of working media.According to relevant criterion, safety factor is mainly considered, the flow velocity of medium is generally no greater than 5m/s in priming valve
~8m/s.
After the completion of hydraulic-oil filling, charging tooling, spool 2 and mandril 3 are withdrawn under 5 power of the spring effect of spring 5 toward pass
Direction movement is closed, priming valve forms first of sealing pair, guarantees not leak during hydraulic-oil filling.
Similarly, it when needing hydraulic oil to release, is connected with tooling is released with priming valve, tooling pushes up mandril 3 in connection procedure
It opens, the spool 2 of priming valve and valve seat 4 separate at this time, and hydraulic oil is released from the channel that spool 2 and valve seat 4 are formed, and hydraulic oil releases
After the completion, charging tooling is withdrawn from.
The priming valve is compact-sized, small in size, sealed reliable, operating pressure 10MPa, effective drift diameter 1.5mm, verifies work
Service life number is no less than 10000 times, be can be used for the filling of hydraulic system hydraulic oil and is released.
Claims (9)
1. a kind of priming valve, including valve body (1), the both ends of valve body (1) are respectively arranged with oil inlet (12) and oil outlet (11),
It is characterized in that, it is axially disposed in the valve body (1) to have the installation cavity being connected to the oil inlet (12), oil outlet (11),
Valve seat (4) are provided in installation cavity；The installation cavity include the lock chamber (17) being sequentially coaxially arranged, seal chamber (16) and
Diversion cavity (15), in which: the rear end of the valve seat (4) is fixed in lock chamber (17), and the front end of valve seat (4) extend into described
Diversion cavity (15) in, valve seat (4) passes through the seal chamber (16) and is interference fitted with seal chamber (16)；Across the valve
(4) are movable is provided with mandril (3) for seat, and the front end of mandril (3) is protruded into the diversion cavity (15) and is equipped with spool (2)；
It is clearance fit between the mandril (3) and valve seat (4).
2. priming valve as described in claim 1, which is characterized in that the valve seat (4) is axially inside provided with sliding chamber
(26), the one end of sliding chamber (26) is pierced by the rear end of the valve seat (4), offers and the sliding chamber in the front end of the valve seat (4)
(26) connection and diameter are less than the oil-through hole (24) of sliding chamber (26)；The mandril (3) passes through sliding chamber (26) and oil-through hole (24),
It is set on mandril (3) spring (5), one end of spring (5) is connected on the snap ring (6) being set on mandril (3), spring (5)
The other end be connected to the front end of the sliding chamber (26)；When mandril (3) is not by external force, the spool (2) and valve seat (4) elasticity
Contact, priming valve is in close state at this time.
3. priming valve as described in claim 1, which is characterized in that described valve seat (4) front end is provided on along the circumferential direction
The thickness of the sealing station (13) of annular, sealing station (13) is gradually reduced along the direction far from valve seat (4), makes the axis of sealing station (13)
It is in isosceles trapezoidal structure to section；The sealing block (22) with the sealing station (13) cooperation is provided on the spool (2),
In, sealant is provided on the front end face of the sealing station (13), the sealing station (13) is metal material, and is sealed
Layer, sealing block (22) are non-metallic material.
4. priming valve as described in claim 1, which is characterized in that the spool (2) include circular core (20) and
It is connected to the core cap (21) of core (20) side, offers the lock hole extended in core cap (21) on the core (20),
The front end of the mandril (3) is threadedly engaged with lock hole to be connect.
5. priming valve as claimed in claim 3, which is characterized in that offer the seal groove of annular on the spool (2)
(19), the sealing block (22) is set in seal groove (19)；It is small and interior big outside the diameter of the seal groove (19), make close
The cross section of sealing groove (19) is in isosceles trapezoidal structure；On the side wall of the seal groove (19) bottom and seal groove (19)
It is provided with sealing thorn slot (23) of taper.
6. priming valve as described in claim 1, which is characterized in that the installation cavity further include setting lock chamber (17) with
Limit chamber (14) between seal chamber (16), the diameter of limit chamber (14), which is greater than the diameter of the seal chamber (16) but is less than, to be fixed
The diameter of chamber (17)；The chuck (25) with the limit chamber (14) cooperation, chuck (25) are provided on described valve seat (4) outer wall
On offer sealing ring (10) slot, be provided with sealing ring (10) in sealing ring (10) slot.
7. priming valve as described in claim 1, which is characterized in that be removably equipped with gland in the lock chamber (17)
(9), gland (9) is internally provided with card chamber (18), and card chamber (18) is pierced by the front end of gland (9), is arranged in the rear end of gland (9)
There is the oil guiding hole (27) being connected to card chamber (18)；The mandril (3) passes through oil guiding hole (27)；On the inner wall of the card chamber (18)
It is provided with step groove, the rear end of the valve seat (4) is stuck in step groove；Between the outer wall and lock chamber (17) of the gland (9)
Interference fit.
8. priming valve as described in claim 1, which is characterized in that valve body (1) rear end is detachably provided with for close
The blocking cap (8) of valve body (1) rear end is sealed, valve body (1) is provided with rubber pad (7) between rear end and bottom surface.
9. priming valve as described in claim 1, which is characterized in that sealing pressure ratio of the spool (2) relative to valve seat (4)
The range of q is 2.5MPa to 3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820423749.0U CN208605630U (en) | 2018-03-27 | 2018-03-27 | A kind of priming valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820423749.0U CN208605630U (en) | 2018-03-27 | 2018-03-27 | A kind of priming valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208605630U true CN208605630U (en) | 2019-03-15 |
Family
ID=65660249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820423749.0U Active CN208605630U (en) | 2018-03-27 | 2018-03-27 | A kind of priming valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208605630U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426037A (en) * | 2018-03-27 | 2018-08-21 | 中国石油化工股份有限公司 | A kind of priming valve |
| CN113483105A (en) * | 2021-08-04 | 2021-10-08 | 西安航天动力研究所 | Inlet pressure self-driven slowly-closed slowly-opened stop valve |
-
2018
- 2018-03-27 CN CN201820423749.0U patent/CN208605630U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426037A (en) * | 2018-03-27 | 2018-08-21 | 中国石油化工股份有限公司 | A kind of priming valve |
| CN113483105A (en) * | 2021-08-04 | 2021-10-08 | 西安航天动力研究所 | Inlet pressure self-driven slowly-closed slowly-opened stop valve |
| CN113483105B (en) * | 2021-08-04 | 2022-07-05 | 西安航天动力研究所 | Inlet pressure self-driven slow-closing slow-opening type stop valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231016 Address after: 100000 22 Chaoyangmen North Street, Chaoyang District, Beijing. Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Patentee after: XI'AN AEROSPACE PROPULSION INSTITUTE Address before: 100020 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: XI'AN AEROSPACE PROPULSION INSTITUTE |
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| TR01 | Transfer of patent right |