CN102678985A - Seawater pressure balancing valve - Google Patents
Seawater pressure balancing valve Download PDFInfo
- Publication number
- CN102678985A CN102678985A CN2012101366711A CN201210136671A CN102678985A CN 102678985 A CN102678985 A CN 102678985A CN 2012101366711 A CN2012101366711 A CN 2012101366711A CN 201210136671 A CN201210136671 A CN 201210136671A CN 102678985 A CN102678985 A CN 102678985A
- Authority
- CN
- China
- Prior art keywords
- valve
- seat
- ball
- ball seat
- valve body
- 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
- 239000013535 sea water Substances 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000003068 static effect Effects 0.000 claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims description 14
- 238000013016 damping Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 5
- 241001484259 Lacuna Species 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000011162 core material Substances 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Taps Or Cocks (AREA)
- Check Valves (AREA)
- Safety Valves (AREA)
Abstract
本发明公开了一种海水压力平衡阀，包括阀体、设置在阀体一端的阀座、设置在另一端的阀套和阀芯部件，阀芯部件包括球座和设置在球座一端的阀芯，阀芯与阀座接触形成阀口，球座另一端套接在阀套内，阀座包括阀座基体、内嵌套和压紧套，阀座基体内部设置有阶梯孔，一端作为入水口，另一端与阀体螺纹连接；内嵌套为中空环状体，一端外侧凸起形成凸肩，内嵌套一端通过该凸肩与阀座基体内的阶梯孔抵接，另一端与阀芯一起构成阀口，压紧套套在内嵌套外周，一端抵接到内嵌套的凸肩上，另一端通过密封圈与阀体配合形成静密封。本发明能够保证系统注排水可控，并且振动较小，入口和出口压力稳定，可以防止海水泵出口压力比入口压力高而出现反转的工况。
The invention discloses a seawater pressure balance valve, which comprises a valve body, a valve seat arranged at one end of the valve body, a valve sleeve arranged at the other end and a valve core part, the valve core part includes a ball seat and a valve seat arranged at one end of the ball seat The valve core is in contact with the valve seat to form a valve port. The other end of the ball seat is sleeved in the valve sleeve. The valve seat includes a valve seat base, an inner nest and a compression sleeve. Nozzle, the other end is threadedly connected with the valve body; the inner nest is a hollow annular body, and one end protrudes outside to form a shoulder, and one end of the inner nest abuts against the stepped hole in the base of the valve seat through the shoulder, and the other end is in contact with the valve body. The cores form the valve port together, and the compression sleeve sleeves the outer periphery of the inner nest, one end abuts on the shoulder of the inner nest, and the other end cooperates with the valve body through a sealing ring to form a static seal. The invention can ensure controllable water injection and drainage of the system, less vibration, stable inlet and outlet pressures, and can prevent reverse working conditions where the outlet pressure of the seawater pump is higher than the inlet pressure.
Description
Technical field
The invention belongs to the control valve class, be specifically related to a kind of sea water pressure balance valve, applicable to being the hydraulic pressure buoyancy regulating system of working medium with seawater, fresh water etc.
Background technique
The sea water hydraulic buoyancy regulating system has been successfully applied in the manned deep-sea vehicle, and its principle is as shown in Figure 1.Certificate figure can know that the sea water pump running flows to through the electromagnetic valve working medium in the system, realizes notes, the draining of withstand voltage water tank in the latent device, to change seawater weight in the water tank, realizes the underwater balance of device of diving.Equilibrated valve is the key element of this system, and following effect is arranged:
When (1) guaranteeing that sea water pump does not start, seawater can directly not arrive water tank through sea water pump, makes system be in runaway condition;
(2) guarantee that delivery side of pump pressure always is higher than inlet pressure, thereby make pump counter-rotating can not occur, can not occur yet since the dark pressure in sea directly with the phenomenon of sea water encroachment to water tank
The 702nd research institute of China Shipbuilding Industry Corporation has announced a kind of ultra-high pressure sea water pressure balance valve (application number: 200810022671.2); Its structure is as shown in Figure 2; This valve mainly is made up of valve body, valve seat, valve pocket, spring, spool, seal ring; Spool is a cone valve structure, is processed with groove on the spool conical surface seal ring is installed, and the valve port place utilizes the compressive force that is enclosed within the generation of spool upper spring with spool and the sealing of valve seat cone match.This valve has solved seawater corrosion problem, the sealing problem of buoyancy adjustment special operation condition, but also has following several deficiency simultaneously: (1) valve port utilizes seal ring sealing on the spool conical surface, and seal ring has the danger of being gone out by high pressure water; (2) cone valve sealing is higher for requirement on machining accuracy, and the pressure loss is bigger, in being inappropriate for, neritic zone; (3) this valve does not dispose damping device, and vibration is big, causes inlet pressure unstable easily.
Summary of the invention
The object of the present invention is to provide a kind of equilibrated valve that can be used for the sea water hydraulic buoyancy regulating system; In being applicable to, neritic zone; It is controlled the assurance system to annotate draining; And vibrate lessly, the entrance and exit pressure stability can prevent that the sea water pump outlet pressure is higher and reversing damped condition occurs than inlet pressure.
The technical solution adopted for the present invention to solve the technical problems is following:
A kind of sea water pressure balance valve is characterized in that, comprise valve body, be arranged on valve body one end valve seat, be arranged on the valve pocket of the valve body the other end and be arranged on the valve hole part in the valve body; Wherein, This valve hole part comprises ball seat and the spool that is arranged on this ball seat one end end, and this spool contacts with valve seat and forms valve port, and this ball seat the other end is socketed in the said valve pocket; Wherein
Said valve seat comprises the valve seat matrix, is nested with and clamping sleeve, and this valve seat matrix set inside has shoulder hole, and the one of which end is as water inlet, and the other end is threaded with valve body; Said being nested with is the hollow and annular body, and the end outside convexes to form convex shoulder, and this is nested with an end through the shoulder hole butt in this convex shoulder and the valve seat matrix, and the other end constitutes valve port with spool; Said clamping sleeve is enclosed within and is nested with periphery, and the one of which end abuts on the convex shoulder that is nested with, and the other end cooperates the formation static seal through seal ring with valve body.
As improvement of the present invention, said valve pocket is arranged on the valve body the other end with the seat end coaxial line, and this valve pocket inside is provided with ladder hole; The one of which end is provided with groove; Be used to install seal ring, form static seal to cooperate with valve body, the other end is as the balance port of equilibrium valve.
As improvement of the present invention, said ball seat is a multidiameter shaft, and this ball seat one end stretches in the shoulder hole of valve pocket; Cooperate with said shoulder hole; Be processed with ball-and-socket on the end face of the other end, be used to install said spool, and be with spring between the ladder shaft part at this ball-and-socket place and the valve pocket; This spring one end is connected on the shaft shoulder of ladder shaft part at ball-and-socket place, the other end and said valve pocket end face butt.
As improvement of the present invention; One end of said ball seat and said valve pocket socket all cooperates with two-stage shoulder hole in the said valve pocket and contacts, and wherein is provided with groove with the shaft part of the ball seat that cooperates than macropore and encloses so that lattice to be installed, and is used for and said valve pocket formation motive sealing; The afterbody shaft part of ball seat cooperates with less interporal lacuna; The cavity that forms between ball seat and the valve pocket communicates with said balance port through this gap, and damping is carried out in this gap that moves through of said ball seat, to alleviate the impact shock that spool receives.
As improvement of the present invention, said spool is pottery or corrosion resistant alloy ball, and it cooperates with the said soft or hard that is nested with, and forms linear sealing.
Valve seat among the present invention is combination shape structure, by the valve seat matrix, be nested with, clamping sleeve forms, clamping sleeve welds with the valve seat matrix and fixes.Valve body is a T shape three-way body, and same axis two ends connect valve seat and valve pocket respectively, with the valve seat connecting end be water inlet, with the valve pocket connecting end be balance port, and valve body T shape male end is a water outlet.Wherein spool is a spheroid, and ball seat is four sections multidiameter shafts, and two sections of an end are stretched in the valve pocket hole, and the big section of diameter has groove installation lattice and encloses, and cooperates with valve pocket to form motive sealing, and end segment cooperates with the less interporal lacuna of valve pocket, and forms cavity between the valve pocket.Ball seat the other end end face is processed with ball-and-socket, and mounting ball valve core, spring housing are contained between ball-and-socket section and the valve pocket.Valve port relies on spring force and hydraulic coupling that spool is pressed on and is nested with, and forms linear sealing.This valve is connected to tubular type with other elements and is connected.
Sea water pressure balance valve of the present invention has following advantage:
(1) valve seat adopts fabricated structure, and embedded engineering plastics in Structural Hardware are that soft or hard cooperates with spool, forms linear sealing, and seal pressure is little, guarantees excellent sealing, reduces the through-flow pressure loss of valve port.
(2) spool adopts the spheroid of shaping operation, guarantees its requirement on machining accuracy easily, and valve core material is pottery or corrosion resistant alloy, has improved the gasproof erosion and the tension silk erosiveness of spool
(3) ball seat is the spring positioning and guiding on the one hand, spacing on the other hand spool; The ball-and-socket diameter is a bit larger tham ball on the ball seat, guarantees the self-align ability of ceramic ball and valve seat, seals more reliable.
(4) this valve is provided with vibration damping equipment, and vibration damping equipment is made up of ball seat, valve pocket, and the cavity that forms between the two communicates with balance port with the gap of valve pocket through ball valve seat afterbody bar.Water in the cavity has damping function because turnover will pass through very little slit to the motion of ball seat, the spool impact shock that has reduced to adopt the physical property of ball valve form and water to bring, thereby the stability of assurance valve inlet seawater pressure.
Description of drawings
Fig. 1 is a sea water hydraulic buoyancy regulating system schematic diagram;
Fig. 2 is existing ultra-high pressure sea water pressure balance valve structure principle chart;
Fig. 3 is the structural representation of sea water pressure balance valve of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further explain.
As shown in Figure 3, the sea water pressure balance valve of present embodiment comprises valve body 1, and the valve seat matrix of in valve body 1, arranging successively 2, be nested with 3, clamping sleeve 4, spool 10, spring 5, ball seat 6, valve pocket 7.
Valve seat is arranged on the end in the two ends of valve body coaxial line, as water intake.This valve seat is the combined type valve seat, comprises valve seat matrix 2, is nested with 3 and clamping sleeve 4.Wherein valve seat matrix 2 two ends all are processed with outside thread, and machined has shoulder hole, and an end is as water inlet I, and the other end is sleeved in the valve body 1, is threaded with valve body 1.Be nested with 3 and be the hollow and annular body, the end outside is protruding, forms chimb, and integral body is the ladder ring-type, and material can be engineering plastics.Be nested with 3 shoulder hole butts, be nested with 3 the other ends and constitute valve port with spool 10 through this chimb and valve seat matrix 2.This is nested with 3 peripheries and is with clamping sleeve 4, and clamping sleeve 4 is an annular solid, is processed with groove on the cylindrical seal ring 8 is installed, and the one of which end abuts to and is nested with on 3 the chimb, and the other end cooperates the formation static seal through seal ring 8 with valve body 1.When making valve seat, will be nested with 3 earlier and put into valve seat matrix 2 shoulder holes, and reinstall clamping sleeve 4 and compress and be nested with 3 ladder surface, at last that valve seat matrix 2 is fixing with clamping sleeve 4 welding.
Valve pocket 7 is arranged on the other end in the two ends of valve body coaxial line, and these valve pocket 7 integral body are the ladder ring bodies, and machined has shoulder hole, and an end threading is as the balance port B of equilibrium valve; Be processed with groove on the other end outer cylinder annular solid seal ring 8 is installed, cooperate with valve body 1 to form static seal; The ladder shaft part is processed with screw thread behind the groove, and valve pocket 7 utilizes this screw thread to be connected with valve body 1.
With the valve body contacting point seal ring 8 is housed all on clamping sleeve 4, the valve pocket 7, on the ball seat 6 lattice is housed and encloses 9.
Spool 10 is pottery or corrosion resistant alloy ball, and is nested with 3 soft or hards and cooperates, and forms linear sealing, as valve port.
During assembling; Earlier seal ring 8 is respectively charged into groove on clamping sleeve 4 and the valve pocket 7; Again lattice are enclosed 9 grooves on the ball seat 6 of packing into, then with the combined type valve seat pack into valve body 1, then with in spool 10, ball seat 6, spring 5, the valve pocket 7 of packing into, at last with valve pocket 7 integral installations to valve body 1.
Ball seat (6) is spring (a 5) positioning and guiding on the one hand, utilizes the shaft shoulder spacing on the other hand; Ball seat (6) is gone up the ball-and-socket diameter and is a bit larger tham spool (10), guarantees the self-align ability of spool (10) and valve seat, seals more reliable.
During user mode, sea water pressure balance valve inlet I is connected with the sea water pump inlet, and outlet O is connected with the water tank members, and balance port B and sea water pump inlet also connect.Working state is divided following two kinds of situation:
(1) when sea water pump from water tank during to the deep-sea draining, balance port B is a water tank pressure, outlet O pressure be sea pressure deeply.When sea water pump did not start, the O mouth pressure was pressed on spool 10 and is nested with on 3, and O mouth place seawater is sealed.And behind starting sea water pump, the seawater pressure of inlet I rises, when pressure surpasses the O mouth pressure, seawater from be nested with 3 with spool 10 between the gap flow into valve body 1 intermediate cavity, flow out the entering pipeline from the O mouth again, get into the ocean at last.
(2) when sea water pump during to the water tank water filling, the B mouth is the dark pressure in sea, and the O mouth is a water tank pressure.When sea water pump did not start, I mouth seawater pressure was identical with the B mouth, and the compressive force that both active force differences on ball seat 6 add spring 5 is pressed on spool 10 and is nested with on 3, and I mouth seawater is sealed.Behind starting sea water pump; The I mouth pressure rises gradually; When rising to when being enough to overcome active force, the compressive force of spring 5, the lattice of B mouth pressure on ball seat 6 and enclosing 9 frictional force sums, be nested with 3 and spool 10 between produce the gap, seawater flows into valve body 1 intermediate cavity from the gap; Flow out from the O mouth again, get into water tank through pipeline and other elements.
Claims (5)
1. a sea water pressure balance valve is characterized in that, comprises valve body (1), is arranged on the valve seat (2 of valve body (1) one end; 3,4), be arranged on the valve pocket (7) of valve body (1) the other end and be arranged on the valve hole part (6,9) in the valve body (1); Wherein, this valve hole part comprises ball seat (6) and is arranged on the spool (10) of these ball seat (6) one end ends, this spool (10) and valve seat (2; 3,4) contact forms valve port, and this ball seat (6) the other end is socketed in the said valve pocket (7); Wherein
Said valve seat (2,3,4) comprises valve seat matrix (2), is nested with (3) and clamping sleeve (4), and this valve seat matrix (2) set inside has shoulder hole, and the one of which end is as water inlet, and the other end is threaded with valve body (1); Said being nested with (3) is the hollow and annular body, and the end outside convexes to form convex shoulder, and this is nested with (3) one ends through the shoulder hole butt in this convex shoulder and the valve seat matrix (2), and the other end constitutes valve port with spool (10); Said clamping sleeve (4) is enclosed within and is nested with (3) periphery, and the one of which end abuts on the convex shoulder that is nested with (3), and the other end cooperates the formation static seal through seal ring (8) with valve body (1).
2. a kind of sea water pressure balance valve according to claim 1; It is characterized in that said valve pocket (7) is arranged on the valve body (1) and the other end of seat end coaxial line, this valve pocket (7) inside is provided with ladder hole; The one of which end is provided with groove; Be used to install seal ring (8), form static seal to cooperate with valve body (1), the other end is as the balance port of equilibrium valve.
3. a kind of sea water pressure balance valve according to claim 1 and 2; It is characterized in that said ball seat (6) is a multidiameter shaft, these ball seat (6) one ends stretch in the shoulder hole of valve pocket (7); Cooperate with said shoulder hole; Be processed with ball-and-socket on the end face of the other end, be used to install said spool (10), and be with spring (5) between the ladder shaft part at this ball-and-socket place and the valve pocket (7); These spring (5) one ends are connected on the shaft shoulder of ladder shaft part at ball-and-socket place, the other end and said valve pocket (7) end face butt.
4. according to the described a kind of sea water pressure balance valve of one of claim 1-3; It is characterized in that; One end of said ball seat (6) and said valve pocket (7) socket all cooperates with two-stage shoulder hole in the said valve pocket (7) and contacts, and wherein is provided with groove with the shaft part of the ball seat that cooperates than macropore (6) and encloses (9) so that lattice to be installed, and is used for and said valve pocket (7) formation motive sealing; The afterbody shaft part of ball seat (6) cooperates with less interporal lacuna; The cavity that forms between ball seat (6) and the valve pocket (7) communicates with said balance port through this gap, and damping shock absorption is carried out in this gap that moves through of said ball seat (6), to alleviate the impact shock that spool (10) receives.
5. according to the described a kind of sea water pressure balance valve of one of claim 1-5, it is characterized in that said spool (10) is pottery or corrosion resistant alloy ball, it cooperates with said being nested with (3) soft or hard, forms linear sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101366711A CN102678985A (en) | 2012-05-04 | 2012-05-04 | Seawater pressure balancing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101366711A CN102678985A (en) | 2012-05-04 | 2012-05-04 | Seawater pressure balancing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102678985A true CN102678985A (en) | 2012-09-19 |
Family
ID=46811340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101366711A Pending CN102678985A (en) | 2012-05-04 | 2012-05-04 | Seawater pressure balancing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102678985A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240593A (en) * | 2015-11-19 | 2016-01-13 | 中国海洋大学 | Electromagnetic reversing valve |
| CN113028109A (en) * | 2021-04-30 | 2021-06-25 | 苏州小科清洁科技有限公司 | Structure of overflow valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2509404Y (en) * | 2001-07-28 | 2002-09-04 | 台州市正发通用元件有限公司 | Ball sealing load relief valve |
| CN2535632Y (en) * | 2002-02-26 | 2003-02-12 | 浙江临海海宏集团有限公司 | Double throttle straight-moving type over-flow valve |
| CN1563764A (en) * | 2004-04-16 | 2005-01-12 | 华中科技大学 | Middle high pressure directly-acting hydraulic overflow valve |
| US20080237514A1 (en) * | 2004-02-04 | 2008-10-02 | Keitaro Yonezawa | Flow Control Valve and Cylinder Apparatus Having the Same |
| CN101319730A (en) * | 2008-07-08 | 2008-12-10 | 中国船舶重工集团公司第七○二研究所 | Ultra-high pressure sea water pressure balance valve |
| CN102400661A (en) * | 2011-11-25 | 2012-04-04 | 中国石油天然气股份有限公司 | Balance valve for multi-layer fracturing operation of continuous oil pipe |
| CN202733084U (en) * | 2012-05-04 | 2013-02-13 | 华中科技大学 | Seawater pressure balance valve |
-
2012
- 2012-05-04 CN CN2012101366711A patent/CN102678985A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2509404Y (en) * | 2001-07-28 | 2002-09-04 | 台州市正发通用元件有限公司 | Ball sealing load relief valve |
| CN2535632Y (en) * | 2002-02-26 | 2003-02-12 | 浙江临海海宏集团有限公司 | Double throttle straight-moving type over-flow valve |
| US20080237514A1 (en) * | 2004-02-04 | 2008-10-02 | Keitaro Yonezawa | Flow Control Valve and Cylinder Apparatus Having the Same |
| CN1563764A (en) * | 2004-04-16 | 2005-01-12 | 华中科技大学 | Middle high pressure directly-acting hydraulic overflow valve |
| CN101319730A (en) * | 2008-07-08 | 2008-12-10 | 中国船舶重工集团公司第七○二研究所 | Ultra-high pressure sea water pressure balance valve |
| CN102400661A (en) * | 2011-11-25 | 2012-04-04 | 中国石油天然气股份有限公司 | Balance valve for multi-layer fracturing operation of continuous oil pipe |
| CN202733084U (en) * | 2012-05-04 | 2013-02-13 | 华中科技大学 | Seawater pressure balance valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240593A (en) * | 2015-11-19 | 2016-01-13 | 中国海洋大学 | Electromagnetic reversing valve |
| CN105240593B (en) * | 2015-11-19 | 2018-01-09 | 中国海洋大学 | A kind of solenoid directional control valve |
| CN113028109A (en) * | 2021-04-30 | 2021-06-25 | 苏州小科清洁科技有限公司 | Structure of overflow valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202733084U (en) | Seawater pressure balance valve | |
| CN102678987A (en) | Seawater hydraulic overflow valve | |
| CN202612746U (en) | Hydraulic seawater overflow valve | |
| CN104019258A (en) | Double-damping direct-acting type hydraulic pressure overflowing valve | |
| CN105401965B (en) | A kind of high-flow safety valve | |
| CN102678985A (en) | Seawater pressure balancing valve | |
| CN203641559U (en) | Axial-flow type pressure regulating valve for natural gas | |
| CN203453514U (en) | Novel pneumatic minimum flow rate valve | |
| CN203115336U (en) | Connecting structure of valve and pipe fitting | |
| CN111456978A (en) | Ultrahigh pressure proportional unloading valve | |
| CN102384307B (en) | Water level control valve with flow rate continuous control function | |
| CN205745779U (en) | A kind of screw connected valve seat and high pressure connection | |
| CN208831814U (en) | Check valve assembly | |
| CN204628669U (en) | A kind of U-shaped pin quick-acting type reduction valve | |
| CN204060739U (en) | A large flow safety valve | |
| CN203614826U (en) | Stacked unidirectional valve | |
| CN105697802B (en) | A kind of underwater fluid gathers valve | |
| CN107654689B (en) | Ball valve | |
| CN207349536U (en) | Full sea bathyscaph shifting ballast flood suction valve | |
| CN206388981U (en) | One kind is floated inserts adapter soon | |
| CN205743833U (en) | A kind of high pressure VR blocks up | |
| CN212480261U (en) | Leakage-proof valve for stabilizing medium pressure in pipeline | |
| CN204060740U (en) | a safety valve | |
| CN203362104U (en) | Sand-up prevention packer | |
| CN203978461U (en) | A spool assembly of a large flow safety valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |
|
| WD01 | Invention patent application deemed withdrawn after publication |