CN109469753A - A kind of safe bottom valve of LNG peculiar to vessel - Google Patents
A kind of safe bottom valve of LNG peculiar to vessel Download PDFInfo
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- CN109469753A CN109469753A CN201811496572.8A CN201811496572A CN109469753A CN 109469753 A CN109469753 A CN 109469753A CN 201811496572 A CN201811496572 A CN 201811496572A CN 109469753 A CN109469753 A CN 109469753A
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The present invention relates to a kind of safe bottom valves of LNG peculiar to vessel, including sequentially connected pneumatic device, transmission chain and urgent block valve, the air control unit includes cylinder, piston rod is set in the cylinder, the piston rod connecting rod, the transmission chain includes operation wirerope, and one end of the operation wirerope connects the pull rod, the other end connects the sunpender of the urgent block valve, and spring is provided with outside the sunpender.This valve is primarily adapted for use in quick closedown when immersed pump maintenance, maintenance in output pipe explosion and LNG tank body usually as the effect conveyed to LNG tank in-vivo medium peculiar to vessel, and storage medium in tank is avoided to leak.
Description
Technical field
The invention belongs to mechanical manufacturing fields, are related to a kind of safe bottom valve of LNG peculiar to vessel.
Background technique
It emerges rapidly with the fast development of petroleum, chemical industry and gas industry, especially LNG as a kind of emerging energy,
Data shows, LNG is huge in domestic demand gap, and LNG relies primarily on shipping import at present, to harbour after major storage exist
LNG treatment plant, then automotive to each terminal client, LNG day output have developed to 2,000,000 sides from 50,000 cubes.Scale is bigger,
The storage tank body peculiar to vessel needed is more.
But current LNG storage tank peculiar to vessel all makes it in case of emergency provide itself there are no a safety device independently cuts
The function of disconnected medium is all to be controlled using the valve on pipeline it, if output channel goes wrong, medium in storage tank
Leakage will cause heavy losses and ill effect.And space is limited on ship, and the installation of common pipe valve needs stringing, reserving valve
Door space occupied causes spaces compact, or even sacrifices other equipment installation space, this valve and tank body are integrated, solves
Shipborne equipment installation space problem；When stormy waves is to attack, severe jolt, common pipe valve interconnecting piece and valve can occur for hull
Internal portion sealing surface will receive the defect that impact causes it to damage or can not repair immediately, then the position damaged occurs
When output channel or valve as described above, existing valve is also unable to satisfy the emergency security function needed at this time.
Application for a patent for invention 201410820723.6 is related to a kind of cabin-bottom valve peculiar to vessel, and the upper end of shell is provided with valve deck, valve
The face of covering is provided with valve rod bracket, and the upper end of valve rod is arranged among valve rod bracket by valve stem nut, and the middle part of valve rod passes through
Valve deck, and pass sequentially through sealing ring, filler pressing sleeve, pressing sleeve nut and valve bonnet seal and link together, valve stem end by pair
Open loop and valve head gland link together with seal receptacle, and the bottom of seal receptacle is connected by baffle seal with baffle, and
It is closely fastened at discharge outlet, is nested with sealing shroud in the left side water inlet of shell, closely tied on the right side of sealing shroud and with it
The sealing plate of conjunction is hinged on the upper end of sealing shroud.The structure of this application is not reasonable.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of safe bottom valve of LNG peculiar to vessel, is suitable for output pipe explosion
With quick closedown when immersed pump maintenance, maintenance in LNG tank body, storage medium in tank is avoided to leak.
The present invention provides the following technical solutions:
A kind of safe bottom valve of LNG peculiar to vessel, including sequentially connected pneumatic device, transmission chain and urgent block valve, the pneumatic control
Device processed includes cylinder, and piston rod, the piston rod connecting rod are arranged in the cylinder, and the transmission chain includes operation steel wire
Rope, one end of the operation wirerope connects the pull rod, the other end connects the sunpender of the urgent block valve, outside the sunpender
It is provided with spring.
The present invention cancels weight, is changed to spring, and when improvement hull jolts, weight weightlessness causes valve leaks, and spring can be certainly
Dynamic compensation sealing is than sub-.
In above scheme preferably, connecting rod is set in the air control unit, the connecting rod is connect with connecting plate, institute
It states connecting plate to connect with bracket, cover board is arranged in the lower section of the bracket, and the lower section setting of the cover board connects disk, the operation steel wire
The link position of rope and the pull rod is set in the space in the cover board besieged city.
Operation cover board is added in the present invention, considers that the tank body on ship is small, no manhole maintenance, thus the connection of transmission chain is mobile
It arrives herein.
In any of the above-described scheme preferably, crosshead is set between the bracket and the cover board, the cover board with it is described
It connects and crosshead is set between disk.
In any of the above-described scheme preferably, the valve deck and the sunpender cooperate with key respectively.
In any of the above-described scheme preferably, spring base is arranged in the lower section of the spring, and valve is arranged in the outer layer of the spring
Lid.
In any of the above-described scheme preferably, the bottom of the urgent block valve is pedestal, and the circumference of the pedestal is to setting
It is equipped with to subtract and answers slot.
Increase of the present invention, which subtracts, answers slot, when eliminating or weakening erecting and welding and hull when jolting stress to sealing pair and valve longevity
The influence of life.
In any of the above-described scheme preferably, described subtract answers slot for up-side down triangle.
In any of the above-described scheme preferably, the urgent block valve further includes valve body, and the valve body is connect with pressing plate, institute
It states and cushion is set between valve body and pressing plate.
In any of the above-described scheme preferably, lip-shaped ring is set between the outside of the valve body and the pedestal.
The present invention cancels former sealing means, is changed to lip-shaped ring sealing, and valve seat can move up and down under the support of spring.
In any of the above-described scheme preferably, at least one is set in a longitudinal direction between the valve body and the pedestal
Second spring.
Increase spring between valve body and pedestal, eliminate hull pitch to the tank body influenced on ship of sealing and service life without
Manhole maintenance, therefore the service life of valve need to be consistent with tank body, spring also eliminates the impact of spool and valve seat when closing herein, extends
Service life.
In any of the above-described scheme preferably, the side of the cylinder connects tracheae.
In any of the above-described scheme preferably, the lower section connection disengaging tracheae of the cylinder.
In any of the above-described scheme preferably, protective cover is provided with outside the air control unit.
In any of the above-described scheme preferably, the piston rod connects movable sleeve, and the movable sleeve connects the pull rod.
In any of the above-described scheme preferably, the movable sleeve and the pull rod junction are provided with limit contact.Limit
Contact connects movable sleeve.The effect of limit contact be the position of valve switch is able to reflect to eject limit shaft (can be from outside
Find out valve whether completely open and close).
In any of the above-described scheme preferably, the bracket is in I-shaped, and the pull rod stretches out the top of the bracket, institute
State the space above setting gland formed between bracket and the pull rod, the sky formed between the bracket and the pull rod
Interior setting filler, the pull rod pass through the gland.
In any of the above-described scheme preferably, a part of the operation wirerope is set to the space in the cover board besieged city
It is interior.
In any of the above-described scheme preferably, the transmission chain further includes stress breakpoint extra steel wire rope and stress wire
Rope.
In any of the above-described scheme preferably, copper wire rope clamp is provided on the operation wirerope.
In any of the above-described scheme preferably, the sunpender passes through the spring base, described in the lower section of the spring base
Pressing ring is set between sunpender and the flap.
In any of the above-described scheme preferably, divided ring is arranged in the lower section of the pressing ring.
In any of the above-described scheme preferably, sealing ring is set in the horizontal direction between the valve body and the pedestal.
In any of the above-described scheme preferably, the gap of the spool of the urgent block valve and valve body is 0.04-0.12mm,
Preferably 0.1mm.
Increase the guiding between spool and valve body in the present invention, when preventing it from jolting, sealing pair misalignment is unsceptered.
The safe bottom valve of LNG peculiar to vessel of the invention is made of pneumatic device, transmission chain and quick action emergency valve three parts: adapted bullet
Spring formula piston actuator shape is small, it is steady to open power output；Transmission chain is safe and reliable；The design of repid cut-off valve full-bore, stream
Body is in flow distribution, and noise is small, and negotiability is big, is closed under the action of the spring rapidly, partial pressure type seat design, sealed reliable,
It is easy to maintenance.This valve usually as the effect conveyed to LNG tank in-vivo medium peculiar to vessel, but be primarily adapted for use in output pipe explosion and
Quick closedown when immersed pump maintenance, maintenance in LNG tank body, avoids storage medium in tank from leaking.The present invention can overcome hull
Influence of jolting, long service life.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of a preferred embodiment of the safe bottom valve of LNG peculiar to vessel of the present invention；
Fig. 2 is the right view of structure shown in Fig. 1；
Fig. 3 is the cylinder portion enlarged drawing of structure shown in Fig. 1；
Fig. 4 is the gland magnified partial view of structure shown in Fig. 1；
Fig. 5 is the deck portion enlarged drawing of structure shown in Fig. 1；
Fig. 6 is the spring section enlarged drawing of structure shown in Fig. 1；
Fig. 7 is the base portion enlarged drawing of structure shown in Fig. 1；
Fig. 8 is the effect picture of structure shown in Fig. 1；
Fig. 9 is the operating principle figure of structure shown in Fig. 1.
Specific embodiment
In order to further appreciate that technical characteristic of the invention, the present invention is explained in detail combined with specific embodiments below
It states.Embodiment only has illustrative effect to the present invention, without the effect of any restrictions, those skilled in the art
The modification for any unsubstantiality made on the basis of the present invention, all should belong to protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " axial direction ", " circumference to "
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand
For indication or suggestion relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In the description of the present invention, " multiple " contain
Justice is at least two, such as two, three etc., unless otherwise specifically defined.
Embodiment 1:
As shown in figs 1-9, a kind of safe bottom valve of LNG peculiar to vessel, including sequentially connected pneumatic device B, transmission chain C and urgent truncation
Valve A, the air control unit B include cylinder B19, and piston rod, the piston rod connecting rod are arranged in the cylinder B19
B11, the transmission chain include operation wirerope C1, and one end of the operation wirerope C1 connects the pull rod B11, the other end connects
It connects and is provided with spring A12 outside the sunpender A16, the sunpender A16 of the urgent block valve A.
In the present embodiment, connecting rod B18 is set in the air control unit B, the connecting rod B18 is connect with connecting plate B13,
The connecting plate B13 is connect with bracket B12, and cover board B3 is arranged in the lower section of the bracket B12, and the lower section setting of the cover board B3 connects
Disk B1, the link position of the operation wirerope C1 and pull rod B11 are set in the space in the besieged city cover board B3.
In the present embodiment, crosshead B2 is set, the cover board B3 connects disk with described between the bracket B12 and the cover board B3
Crosshead B2 is set between B1.
In the present embodiment, the cover board B3 is fixed by screws on the crosshead B2, the screw and the operation
Cover plate for sealing pad is set between frame B2.
In the present embodiment, the crosshead B2 is connect by screw B10 with the bracket B12.
In the present embodiment, the valve deck A13 and the sunpender A16 cooperate with key A17 respectively.
In the present embodiment, spring base A11 is arranged in the lower section of the spring A12, and valve deck is arranged in the outer layer of the spring A12
A13。
In the present embodiment, the valve deck A13 is bolted on valve A 3.It is arranged between bolt and valve deck A13 anti-
Pine pad.
In the present embodiment, the bottom of the urgent block valve A is pedestal A1, and the circumference of the pedestal A1 is answered to being provided with to subtract
Slot.
In the present embodiment, described subtract answers slot for up-side down triangle.
In the present embodiment, the urgent block valve A further includes valve A 3, and the valve A 3 is connect with pressing plate A4, the valve
Cushion A19 is set between body A3 and pressing plate A4.
In the present embodiment, the pressing plate A4 is fixed by nuts and bolt, is arranged between the nut and the pressing plate A4
Locking pad.Pressing plate A4 is fixed on pedestal A1.
In the present embodiment, lip-shaped ring is set between the outside of the valve A 3 and the pedestal A1.
In the present embodiment, at least one second spring is set in a longitudinal direction between the valve A 3 and the pedestal A1
A18。
In the present embodiment, the side of the cylinder B19 connects tracheae B23.
In the present embodiment, the lower section connection disengaging tracheae B28 of the cylinder B19.It is provided with and connects on the disengaging tracheae B28
Head, retainer ring and nut.
In the present embodiment, protective cover B14 is provided with outside the air control unit B.
In the present embodiment, in the connector or contact B27 of the outside of protective cover B14 setting travel switch.
In the present embodiment, the piston rod connects movable sleeve B15, the movable sleeve B15 connection pull rod B11.
In the present embodiment, the movable sleeve B15 and the junction the pull rod B11 are provided with limit contact B17.Limit contact
Connect movable sleeve B15.
In the present embodiment, the limit contact B17 is connect by stop nut B16 with the movable sleeve B15.
In the present embodiment, for the bracket B12 in I-shaped, the pull rod B11 stretches out the top of the bracket B12, described
Space above setting the gland B7, the bracket B12 and the pull rod B11 formed between bracket B12 and the pull rod B11
Between filler B6 is set in the space that is formed, the pull rod B11 passes through the gland B7.
In the present embodiment, the gland B7 is fixed on the bracket B12 by stud and nut.
In the present embodiment, a part of the operation wirerope C1 is set in the space in the besieged city cover board B3.
In the present embodiment, the transmission chain C further includes stress breakpoint extra steel wire rope C3 and stress wire rope C2.
In the present embodiment, copper wire rope clamp C4 is provided on the operation wirerope C1.
In the present embodiment, the sunpender A16 passes through the spring base A11, described to hang in the lower section of the spring base A11
Pressing ring A10 is set between bar A16 and the flap A8.
In the present embodiment, divided ring A9 is arranged in the lower section of the pressing ring A10.
In the present embodiment, sealing ring A2 is set in the horizontal direction between the valve A 3 and the pedestal A1.
In the present embodiment, pneumatic nameplate, position number plate and valve nameplate are set on the outer wall of the air control unit B.
In the present embodiment, the spool of the urgent block valve and the gap of valve body are 0.04-0.12mm, preferably 0.1mm.
Working principle (see operating principle figure)
In normal operating conditions, solenoid valve obtains electric, and the gas source with 4bar~6bar pressure passes through three linked piece, solenoid valve, unidirectional section
Flow valve (adjustment valve opening speed), tracheae (B23) enters cylinder, drive pull rod (B11), operation wirerope (C1), sunpender
(A16), lift flap (A8), to open valve.
In case of emergency (such as output channel explosion, immersed pump maintenance and maintenance), in order to avoid storage medium is let out in tank
Leakage palpus rapid-closure damper: solenoid valve power loss, air inlet pipeline closing, cylinder exhaust pipeline are opened, and power is lost in operation wirerope (C1),
Valve spring and medium active force close rapidly flap (A8).The cooperation of the guiding of flap (A8) and valve body (A3) and flap (A8)
Valve spring can overcome the fluctuating of jolting on ship to influence when closing on valve on sealing bring.
This valve mode of operation: electric-unlatching, power loss-closing are obtained.
Embodiment 2:
As shown in figs 1-9, a kind of safe bottom valve of LNG peculiar to vessel, including sequentially connected pneumatic device B, transmission chain C and urgent truncation
Valve A, the air control unit B include cylinder B19, and piston rod, the piston rod connecting rod are arranged in the cylinder B19
B11, the transmission chain include operation wirerope C1, and one end of the operation wirerope C1 connects the pull rod B11, the other end connects
It connects and is provided with spring A12 outside the sunpender A16, the sunpender A16 of the urgent block valve A.
Embodiment 3:
Connecting rod B18, the connecting rod B18 and company is arranged on the basis of embodiment 2 in the present embodiment in the air control unit B
Fishplate bar B13 connection, the connecting plate B13 are connect with bracket B12, and cover board B3, the cover board B3 is arranged in the lower section of the bracket B12
Lower section setting meet disk B1, the link position of the operation wirerope C1 and pull rod B11 is set to the cover board B3 and encircles a city
Space in.
Crosshead B2, the cover board B3 and the setting behaviour between meeting disk B1 are set between the bracket B12 and the cover board B3
Make frame B2.
In the present embodiment, the cover board B3 is fixed by screws on the crosshead B2, the screw and the operation
Cover plate for sealing pad is set between frame B2.
In the present embodiment, the crosshead B2 is connect by screw B10 with the bracket B12.
Embodiment 4:
On the basis of embodiment 3, the valve deck A13 and the sunpender A16 cooperate with key A17 the present embodiment respectively.
In the present embodiment, spring base A11 is arranged in the lower section of the spring A12, and valve deck is arranged in the outer layer of the spring A12
A13。
In the present embodiment, the valve deck A13 is bolted on valve A 3.It is arranged between bolt and valve deck A13 anti-
Pine pad.
In the present embodiment, the bottom of the urgent block valve A is pedestal A1, and the circumference of the pedestal A1 is answered to being provided with to subtract
Slot.
In the present embodiment, described subtract answers slot for up-side down triangle.
In the present embodiment, the urgent block valve A further includes valve A 3, and the valve A 3 is connect with pressing plate A4, the valve
Cushion A19 is set between body A3 and pressing plate A4.
In the present embodiment, the pressing plate A4 is fixed by nuts and bolt, is arranged between the nut and the pressing plate A4
Locking pad.Pressing plate A4 is fixed on pedestal A1.
In the present embodiment, lip-shaped ring is set between the outside of the valve A 3 and the pedestal A1.
In the present embodiment, at least one second spring is set in a longitudinal direction between the valve A 3 and the pedestal A1
A18。
Embodiment 5:
The present embodiment is on the basis of embodiment 4, and in the present embodiment, the side of the cylinder B19 connects tracheae B23.
In the present embodiment, the lower section connection disengaging tracheae B28 of the cylinder B19.It is provided with and connects on the disengaging tracheae B28
Head, retainer ring and nut.
In the present embodiment, protective cover B14 is provided with outside the air control unit B.
In the present embodiment, in the connector or contact B27 of the outside of protective cover B14 setting travel switch.
In the present embodiment, the piston rod connects movable sleeve B15, the movable sleeve B15 connection pull rod B11.
In the present embodiment, the movable sleeve B15 and the junction the pull rod B11 are provided with limit contact B17.Limit contact
Connect movable sleeve B15.
In the present embodiment, the limit contact B17 is connect by stop nut B16 with the movable sleeve B15.
In the present embodiment, for the bracket B12 in I-shaped, the pull rod B11 stretches out the top of the bracket B12, described
Space above setting the gland B7, the bracket B12 and the pull rod B11 formed between bracket B12 and the pull rod B11
Between filler B6 is set in the space that is formed, the pull rod B11 passes through the gland B7.
In the present embodiment, the gland B7 is fixed on the bracket B12 by stud and nut.
In the present embodiment, a part of the operation wirerope C1 is set in the space in the besieged city cover board B3.
In the present embodiment, the transmission chain C further includes stress breakpoint extra steel wire rope C3 and stress wire rope C2.
In the present embodiment, copper wire rope clamp C4 is provided on the operation wirerope C1.
In the present embodiment, the sunpender A16 passes through the spring base A11, described to hang in the lower section of the spring base A11
Pressing ring A10 is set between bar A16 and the flap A8.
In the present embodiment, divided ring A9 is arranged in the lower section of the pressing ring A10.
In the present embodiment, sealing ring A2 is set in the horizontal direction between the valve A 3 and the pedestal A1.
In the present embodiment, the spool of the urgent block valve and the gap of valve body are 0.1mm.
Claims (10)
1. a kind of safe bottom valve of LNG peculiar to vessel, including sequentially connected pneumatic device (B), transmission chain (C) and urgent block valve (A),
It is characterized by: the air control unit (B) includes cylinder (B19), piston rod is set, the piston rod connects in the cylinder
It connects pull rod (B11), the transmission chain (C) includes operation wirerope (C1), described in one end connection of operation wirerope (C1)
Pull rod (B11), the other end connect the sunpender (A16) of the urgent block valve (A), are provided with spring outside the sunpender (A16)
(A12).
2. the safe bottom valve of LNG peculiar to vessel according to claim 1, it is characterised in that: (B) is arranged in the air control unit
Connecting rod (B18), the connecting rod (B18) connect with connecting plate (B13), and the connecting plate (B13) connect with bracket (B12), described
Cover board (B3) is arranged in the lower section of bracket (B12), and the lower section setting of the cover board (B3) connects disk (B1), the operation wirerope (C1)
It is set to the link position of the pull rod (B11) in the space in the besieged city the cover board (B3).
3. the safe bottom valve of LNG peculiar to vessel according to claim 2, it is characterised in that: the bracket (B12) and the cover board
(B3) crosshead (B2) is set between, the cover board (B3) and setting crosshead (B2) between meeting disk (B1).
4. the safe bottom valve of LNG peculiar to vessel according to claim 1, it is characterised in that: the valve deck (A13) and the sunpender
(A16) cooperate respectively with key (A17).
5. the safe bottom valve of LNG peculiar to vessel according to claim 1, it is characterised in that: bullet is arranged in the lower section of the spring (A12)
Valve deck (A13) is arranged in the outer layer of spring abutment (A11), the spring (A12).
6. the safe bottom valve of LNG peculiar to vessel according to claim 1, it is characterised in that: the bottom of the urgent block valve (A) is
Pedestal (A1), the circumference of the pedestal (A1) answer slot to being provided with to subtract.
7. the safe bottom valve of LNG peculiar to vessel according to claim 6, it is characterised in that: described subtract answers slot for up-side down triangle.
8. the safe bottom valve of LNG peculiar to vessel according to claim 6, it is characterised in that: the urgent block valve (A) further includes valve
Body (A3), the valve body (A3) connect with pressing plate (A4), and cushion (A19) is arranged between the valve body (A3) and pressing plate (A4).
9. the safe bottom valve of LNG peculiar to vessel according to claim 8, it is characterised in that: the outside of the valve body (A3) with it is described
Lip-shaped ring is set between pedestal (A1).
10. the safe bottom valve of LNG peculiar to vessel according to claim 8, it is characterised in that: the valve body (A3) and the pedestal
(A1) at least one second spring (A18) is set in a longitudinal direction between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496572.8A CN109469753A (en) | 2018-12-07 | 2018-12-07 | A kind of safe bottom valve of LNG peculiar to vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496572.8A CN109469753A (en) | 2018-12-07 | 2018-12-07 | A kind of safe bottom valve of LNG peculiar to vessel |
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| Publication Number | Publication Date |
|---|---|
| CN109469753A true CN109469753A (en) | 2019-03-15 |
Family
ID=65674842
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811496572.8A Pending CN109469753A (en) | 2018-12-07 | 2018-12-07 | A kind of safe bottom valve of LNG peculiar to vessel |
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| US4372392A (en) * | 1980-10-07 | 1983-02-08 | Halliburton Company | Full opening emergency relief and safety valve |
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| CN204025716U (en) * | 2014-08-18 | 2014-12-17 | 温州市石化机械阀门有限公司 | Sealed type stop valve |
| CN204729691U (en) * | 2015-05-20 | 2015-10-28 | 天津斯维克阀业有限公司 | A kind of sound insulation safety check |
| CN205190759U (en) * | 2015-10-22 | 2016-04-27 | 四川格林流体控制设备有限公司 | A valve |
| CN105402457B (en) * | 2015-10-22 | 2018-05-08 | 四川格林流体控制设备有限公司 | A kind of tank cutoff valve |
| CN207073586U (en) * | 2017-06-14 | 2018-03-06 | 苏州德兰能源科技股份有限公司 | A kind of floating type double-valve-seat adjustable valve with double spools |
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