CN108397631A - A kind of self-styled dry type quick coupling of locking type - Google Patents
A kind of self-styled dry type quick coupling of locking type Download PDFInfo
- Publication number
- CN108397631A CN108397631A CN201810399413.XA CN201810399413A CN108397631A CN 108397631 A CN108397631 A CN 108397631A CN 201810399413 A CN201810399413 A CN 201810399413A CN 108397631 A CN108397631 A CN 108397631A
- Authority
- CN
- China
- Prior art keywords
- dry type
- female connector
- styled
- self
- spring
- 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
- 230000008878 coupling Effects 0.000 title claims abstract description 33
- 238000010168 coupling process Methods 0.000 title claims abstract description 33
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 33
- 239000007787 solid Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000003032 molecular docking Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/28—Couplings of the quick-acting type with fluid cut-off means
- F16L37/30—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings
- F16L37/32—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied
- F16L37/36—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied with two lift valves being actuated to initiate the flow through the coupling after the two coupling parts are locked against withdrawal
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a kind of self-styled dry type quick couplings of locking type, including the quick pin end of dry type and the quick female connector of dry type；The quick pin end of dry type includes public access casing, pin end valve seat, guide spring bushing, spring, sliding valve core and spiral guide slot；The quick female connector of dry type includes female connector shell, spool support base, fixed spool, sliding valve seat, pilot bushing, spring bushing, spring, drive end bearing bracket, cam and operation handwheel；The self-styled dry type quick coupling of locking type of the present invention axially screws in back-out pin end by female connector and is connected and disconnected to realize, the leakage rate of connection and medium in disconnection process when reducing fluid conveying, to achieve the purpose that environmental protection and saving；The self-styled dry type quick coupling of locking type of the present invention reduces the internal friction of mechanical structure by cam, spirally-guided slot structure, and operation driving force is minimum, saves time and cost, flowing rate design, it is ensured that flow, the pressure loss are smaller.
Description
Technical field
The present invention relates to piecing devices technical field, especially a kind of self-styled dry type quick coupling of locking type.
Background technology
Piecing devices generally require access switch valve in the prior art, to control the connection and disconnection of fluid conveying；Not only
The leakage of connection and medium in disconnection process when increasing only number of devices and equipment cost, and often increasing fluid conveying
Amount；Particularly with toxic, harmful, high-risk and precious fluids medium, it is unfavorable for environmental protection and saves.
Invention content
The purpose of the present invention is to provide a kind of simple in structure, easy to use, reliability is high, safety is good locking type from
Seal dry type quick coupling.
Realize that the technical solution of the object of the invention is：
A kind of self-styled dry type quick coupling of locking type, which is characterized in that including the quick pin end of dry type and the quick female connector of dry type；
The quick pin end of dry type includes public access casing, pin end valve seat, guide spring bushing, spring, sliding valve core and spiral
Guide groove；One end is provided with pin end valve seat in the public access casing, and guide spring bushing is provided on pin end valve seat, is led
It is mutually fixedly connected with one end of spring to spring bushing, the other end of spring is mutually fixedly connected with sliding valve core；Public access casing
The spiral guide slot with check function is provided on the outer surface of the other end；The quick female connector of dry type includes female connector shell
Body, spool support base, fixed spool, sliding valve seat, pilot bushing, spring bushing, spring, drive end bearing bracket, cam and operation handwheel；
One end of the female connector shell is provided with spool support base, and spool support base is mutually fixedly connected with one end of fixed spool, Gu
The other end of fixed valve plug is in contact with sliding valve seat, slides and is provided with pilot bushing between valve seat and female connector shell, is oriented to lining
The side of set is provided with spring bushing, and spring is provided in spring bushing；The other end of the female connector shell is provided with front end
It covers, is provided with cam on the other end inner wall of female connector shell, operation handwheel is provided on the outer wall of female connector shell.
Preferably, it is provided with only stopper circle on the outer surface of public access casing.
Preferably, the first O-ring is provided between sliding valve core and public access casing.
Preferably, the first gasket is provided between public access casing and pin end valve seat.
Preferably, the second gasket is provided between female connector shell and spool support base.
Preferably, it is provided with the second O-ring between fixed spool and sliding valve seat.
Compared with prior art, the present invention its remarkable advantage：
（1）The self-styled dry type quick coupling of locking type of the present invention is axially screwed in by female connector screws out pin end to realize connection and break
It opens, the leakage rate of connection and medium in disconnection process when reducing fluid conveying, to achieve the purpose that environmental protection and save.
（2）The self-styled dry type quick coupling of locking type of the present invention reduces mechanical structure by cam, spirally-guided slot structure
Internal friction, operation driving force is minimum, saves time and cost, flowing rate design, it is ensured that flow, the pressure loss are smaller.
（3）Pin end spiral guide slot introduces lift angle in the self-styled dry type quick coupling of locking type of the present invention and drop angle is set
Meter can be anti-to undesirably fall off with self-locking after making the docking in place of male and female connector；It, can be manual and after male and female connector docks
Open and stop stopper circle, provide it is double it is anti-undesirably fall off protection, keep operation safer, it is more reliable.
（4）Male and female connector docking site locally uses Copper alloy material in the self-styled dry type quick coupling of locking type of the present invention,
Prevent docking when collide with generate spark explosion-proof effect can be played for inflammable, explosive medium.
（5）The self-styled dry type quick coupling of locking type of the present invention can realize being connected and disconnected from elevated pressures, and when disconnection is same
Step is closed valve port, avoids medium accidental release.
（6）The self-styled dry type quick coupling of locking type of the present invention carries mechanical mistake proofing welding system, pin end and female connector
With use, spiral guide slot can unanimously be realized with cam arrangement and be docked, and misconnection is avoided；And the self-styled dry type of locking type of the present invention is fast
Quick coupling uses modularized design, on-site maintenance efficient and convenient.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is required attached drawing in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the self-styled dry type quick coupling of locking type of the present invention.
Fig. 2 is the structural schematic diagram of the quick pin end of dry type in the self-styled dry type quick coupling of locking type of the present invention.
Fig. 3 is the structural schematic diagram of the quick female connector of dry type in the self-styled dry type quick coupling of locking type of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1：
As shown in Figure 1, Figure 2 and Figure 3, the self-styled dry type quick coupling of a kind of locking type, including the quick pin end of dry type and dry type it is fast
Fast female connector；The quick pin end of dry type includes public access casing 1, pin end valve seat 2, guide spring bushing 3, spring 4, slides
Movable valve plug 5, the first O-ring 6, spiral guide slot 7 and the first gasket 8；One end is provided with pin end in the public access casing 1
Valve seat 2 is provided with the first gasket 8, guiding bullet is provided on pin end valve seat 2 between public access casing 1 and pin end valve seat 2
Spring bushing 3, guide spring bushing 3 are mutually fixedly connected with one end of spring 4, and the other end of spring 4 is fixed with 5 phase of sliding valve core to be connected
It connects, the first O-ring 6 is provided between sliding valve core 5 and public access casing 1；It is arranged on the outer surface of 1 other end of public access casing
There is the spiral guide slot 7 with check function；Only stopper circle 9 is provided on the outer surface of shown public access casing 1, only stopper circle
9 are located at the side of spiral guide slot 7；The quick female connector of dry type includes female connector shell 10, spool support base 11, fixed valve
Core 12, sliding valve seat 13, pilot bushing 14, spring bushing 15, spring 16, drive end bearing bracket 17, cam 18, operation handwheel 19, second
Gasket 20 and the second O-ring 21；One end of the female connector shell 10 is provided with spool support base 11, female connector shell 10 with
The second gasket 20 is provided between spool support base 11；One end of shown spool support base 11 and fixed spool 12 is mutually fixed to be connected
It connects, the other end of fixed spool 12 is in contact with sliding valve seat 13, and the 2nd O is provided between fixed spool 12 and sliding valve seat 13
Type circle 21 slides and is provided with pilot bushing 14 between valve seat 13 and female connector shell 10, and the side of pilot bushing 14 is provided with bullet
Spring bushing 15 is provided with spring 16 in spring bushing 15；The other end of the female connector shell 10 is provided with drive end bearing bracket 17, and mother connects
It is provided with cam 18 on the other end inner wall of casing 10, operation handwheel 19 is provided on the outer wall of female connector shell 10.
The operation principle of the self-styled dry type quick coupling of locking type of the present invention：
The operation handwheel on female connector is rotated when docking, allows cam on female connector along the spiral guide slot of pin end outer surface
It slides into；
When rotation angle reaches 10 °, male and female connector front end combines and forms the confined space being isolated from the outside, then, pin end
Gradually displacement is staggered the valve seat of spool and female connector；
When rotation angle reaches 120 °, to maximum opening, it is that cricoid flowing is logical to form cross section for spool and valve seat screens
Road；
Then the only stopper circle on pin end is stirred, so that it is lockked female connector completely, prevents male and female connector from surprisingly disengaging, so far,
Docking finishes.
When male and female connector needs to disengage, the only stopper circle on pin end is reversely stirred first, releases lockup state, so
Negative direction rotates female connector afterwards, and process is contrary to the above；At this point, the respective spool of male and female connector, valve seat gradually reset closure,
Until completely cut off access；Continue to rotate, male and female connector just completes real mask work, avoids the leakage of medium.
In conclusion the self-styled dry type quick coupling of locking type of the present invention is axially screwed in by female connector screws out pin end come real
It is now connected and disconnected from, the leakage rate of connection and medium in disconnection process when reducing fluid conveying, to reach environmental protection and save
Purpose；The self-styled dry type quick coupling of locking type of the present invention reduces the inside of mechanical structure by cam, spirally-guided slot structure
Friction, operation driving force is minimum, saves time and cost, flowing rate design, it is ensured that flow, the pressure loss are smaller；The present invention
Pin end spiral guide slot introduces lift angle and the design of drop angle in the self-styled dry type quick coupling of locking type, and male and female connector is made to dock
It, can be anti-to undesirably fall off with self-locking after in place；And after male and female connector docks, it manually opened can stop stopper circle, provide
It is double to prevent undesirably falling off protection, keep operation safer, it is more reliable；Male and female connects in the self-styled dry type quick coupling of locking type of the present invention
Head docking site locally use Copper alloy material, prevent docking when collide with generate spark inflammable, explosive medium can be played
Explosion-proof effect；The self-styled dry type quick coupling of locking type of the present invention can realize being connected and disconnected from elevated pressures, and when disconnection synchronizes
It is closed valve port, avoids medium accidental release；The self-styled dry type quick coupling of locking type of the present invention carries mechanical mistake proofing welding system, public
Connector and female connector matching use, and spiral guide slot can unanimously be realized with cam arrangement and be docked, and misconnection is avoided；And the present invention locks
Only the self-styled dry type quick coupling of type uses modularized design, on-site maintenance efficient and convenient.
Particular embodiments described above, the technical issues of to the solution of the present invention, technical solution and advantageous effect carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to
The present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection domain of invention.
Claims (6)
1. a kind of self-styled dry type quick coupling of locking type, which is characterized in that connect including the quick pin end of dry type and the quick mother of dry type
Head；The quick pin end of dry type includes public access casing（1）, pin end valve seat（2）, guide spring bushing（3）, spring（4）、
Sliding valve core（5）And spiral guide slot（7）；The public access casing（1）Interior one end is provided with pin end valve seat（2）, pin end
Valve seat（2）On be provided with guide spring bushing（3）, guide spring bushing（3）With spring（4）One end be mutually fixedly connected, spring
（4）The other end and sliding valve core（5）Mutually it is fixedly connected；Public access casing（1）It is provided on the outer surface of the other end with only
Return the spiral guide slot of function（7）；The quick female connector of dry type includes female connector shell（10）, spool support base（11）, it is solid
Fixed valve plug（12）, sliding valve seat（13）, pilot bushing（14）, spring bushing（15）, spring（16）, drive end bearing bracket（17）, cam
（18）With operation handwheel（19）；The female connector shell（10）One end be provided with spool support base（11）, spool support base
（11）With fixed spool（12）One end be mutually fixedly connected, fixed spool（12）The other end with sliding valve seat（13）It is in contact,
Slide valve seat（13）With female connector shell（10）Between be provided with pilot bushing（14）, pilot bushing（14）Side be provided with bullet
Spring bushing（15）, spring bushing（15）Inside it is provided with spring（16）；The female connector shell（10）The other end be provided with front end
Lid（17）, female connector shell（10）Other end inner wall on be provided with cam（18）, female connector shell（10）Outer wall on be arranged
There is operation handwheel（19）.
2. the self-styled dry type quick coupling of locking type according to claim 1, which is characterized in that public access casing（1）It is outer
Only stopper circle is provided on surface（9）.
3. the self-styled dry type quick coupling of locking type according to claim 1, which is characterized in that public access casing（1）With cunning
Movable valve plug（5）Between be provided with the first O-ring（6）.
4. the self-styled dry type quick coupling of locking type according to claim 1, which is characterized in that public access casing（1）With public affairs
Connector valve seat（2）Between be provided with the first gasket（8）.
5. the self-styled dry type quick coupling of locking type according to claim 1, which is characterized in that female connector shell（10）With valve
Core support base（11）Between be provided with the second gasket（20）.
6. the self-styled dry type quick coupling of locking type according to claim 1, which is characterized in that fixed spool（12）With sliding
Valve seat（13）Between be provided with the second O-ring（21）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810399413.XA CN108397631A (en) | 2018-04-28 | 2018-04-28 | A kind of self-styled dry type quick coupling of locking type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810399413.XA CN108397631A (en) | 2018-04-28 | 2018-04-28 | A kind of self-styled dry type quick coupling of locking type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108397631A true CN108397631A (en) | 2018-08-14 |
Family
ID=63100647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810399413.XA Pending CN108397631A (en) | 2018-04-28 | 2018-04-28 | A kind of self-styled dry type quick coupling of locking type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108397631A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217809A (en) * | 2020-01-21 | 2021-08-06 | 中国石油化工股份有限公司 | Dry-type quick joint for loading and unloading LNG (liquefied natural gas) car tank car |
| CN114151391A (en) * | 2021-12-14 | 2022-03-08 | 青州海盾液压机械有限公司 | Energy-saving digital hydraulic system and use method thereof |
| CN114673844A (en) * | 2022-03-30 | 2022-06-28 | 重庆大学 | Self-sealing separating joint for preventing aircraft fuel system from crash |
| CN114909600A (en) * | 2022-05-10 | 2022-08-16 | 中海石油气电集团有限责任公司 | LNG power ship storage and supply system with replaceable fuel tank |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19724120A1 (en) * | 1997-06-09 | 1998-12-10 | Walther Carl Kurt Gmbh | Push-fit hose connector guide bush |
| US6095572A (en) * | 1998-01-20 | 2000-08-01 | Optimize Technologies, Inc. | Quarter turn quick connect fitting |
| JP2001082656A (en) * | 1999-09-16 | 2001-03-30 | Bridgestone Corp | Hose joint fitting |
| CN201407448Y (en) * | 2009-04-13 | 2010-02-17 | 江苏长隆科技有限公司 | Dry-cutting type quick joint |
| CN202561336U (en) * | 2012-04-25 | 2012-11-28 | 都江堰市索邦农业机械有限公司 | Quickly-detachable coupling |
| CN103124874A (en) * | 2010-07-05 | 2013-05-29 | 澳大拉西亚钢铁制品有限公司 | Fluid coupling |
| CN204852723U (en) * | 2015-07-20 | 2015-12-09 | 中国电子科技集团公司第十四研究所 | Novel proclaim oneself quick -operation joint |
| CN105221879A (en) * | 2015-10-21 | 2016-01-06 | 武汉三江航天远方科技有限公司 | Filling station rapid pipe joint peculiar to vessel |
| US20170191595A1 (en) * | 2015-12-31 | 2017-07-06 | Dixon Quick Coupling | Fluid Coupling and Method |
| CN208311747U (en) * | 2018-04-28 | 2019-01-01 | 连云港天邦科技开发有限公司 | A kind of self-styled dry type quick coupling of locking type |
-
2018
- 2018-04-28 CN CN201810399413.XA patent/CN108397631A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19724120A1 (en) * | 1997-06-09 | 1998-12-10 | Walther Carl Kurt Gmbh | Push-fit hose connector guide bush |
| US6095572A (en) * | 1998-01-20 | 2000-08-01 | Optimize Technologies, Inc. | Quarter turn quick connect fitting |
| JP2001082656A (en) * | 1999-09-16 | 2001-03-30 | Bridgestone Corp | Hose joint fitting |
| CN201407448Y (en) * | 2009-04-13 | 2010-02-17 | 江苏长隆科技有限公司 | Dry-cutting type quick joint |
| CN103124874A (en) * | 2010-07-05 | 2013-05-29 | 澳大拉西亚钢铁制品有限公司 | Fluid coupling |
| CN202561336U (en) * | 2012-04-25 | 2012-11-28 | 都江堰市索邦农业机械有限公司 | Quickly-detachable coupling |
| CN204852723U (en) * | 2015-07-20 | 2015-12-09 | 中国电子科技集团公司第十四研究所 | Novel proclaim oneself quick -operation joint |
| CN105221879A (en) * | 2015-10-21 | 2016-01-06 | 武汉三江航天远方科技有限公司 | Filling station rapid pipe joint peculiar to vessel |
| US20170191595A1 (en) * | 2015-12-31 | 2017-07-06 | Dixon Quick Coupling | Fluid Coupling and Method |
| CN208311747U (en) * | 2018-04-28 | 2019-01-01 | 连云港天邦科技开发有限公司 | A kind of self-styled dry type quick coupling of locking type |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217809A (en) * | 2020-01-21 | 2021-08-06 | 中国石油化工股份有限公司 | Dry-type quick joint for loading and unloading LNG (liquefied natural gas) car tank car |
| CN114151391A (en) * | 2021-12-14 | 2022-03-08 | 青州海盾液压机械有限公司 | Energy-saving digital hydraulic system and use method thereof |
| CN114151391B (en) * | 2021-12-14 | 2022-06-28 | 青州海盾液压机械有限公司 | Energy-saving digital hydraulic system and using method thereof |
| CN114673844A (en) * | 2022-03-30 | 2022-06-28 | 重庆大学 | Self-sealing separating joint for preventing aircraft fuel system from crash |
| CN114673844B (en) * | 2022-03-30 | 2022-11-25 | 重庆大学 | Self-sealing separating joint for preventing aircraft fuel system from crash |
| CN114909600A (en) * | 2022-05-10 | 2022-08-16 | 中海石油气电集团有限责任公司 | LNG power ship storage and supply system with replaceable fuel tank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108397631A (en) | A kind of self-styled dry type quick coupling of locking type | |
| JP2019213919A5 (en) | ||
| CN208311747U (en) | A kind of self-styled dry type quick coupling of locking type | |
| EP2796756B1 (en) | Safety discharge valve | |
| US9851017B2 (en) | Locking mechanism for unisex ball valve coupling | |
| CN111594624B (en) | Quick-connecting butterfly valve | |
| CN101737503B (en) | Self-balancing stop valve with piston type valve core and hidden rod | |
| US2696993A (en) | Valved pipe coupling | |
| CN103953767A (en) | Self-closed valve for gas transmission pipeline | |
| CN111536253A (en) | Ball valve with long service life | |
| CN102374326A (en) | Gas self-closing valve with long-distance hose falloff and microleakage closing functions | |
| CN205806596U (en) | Paint high-pressure filteration safety relief valve | |
| CN113339528B (en) | Butterfly valve | |
| CN110701333B (en) | Hermaphrodite fluid ball valve capable of preventing mistaken pulling operation | |
| CN106641411A (en) | Quick-closing valve | |
| CN207049494U (en) | A kind of fluid connector of anti-leak | |
| CN210714635U (en) | Gas well pressure operation balance pressure relief device | |
| CN203316882U (en) | Oxygen cutting device | |
| CN112377704B (en) | Fluid rotatable direction-changing self-sealing pipe joint | |
| CN114992112B (en) | Pump stopping protection device and mixed delivery pump | |
| CN203713903U (en) | Ball type angle cock capable of preventing abnormal closing | |
| US11408518B2 (en) | Pivoting valve for regulating the flow of a fluid and procedure for regulating the flow of a fluid | |
| CN217582089U (en) | Valve group component for underground safety valve | |
| US11835143B2 (en) | Filling valve | |
| CN113503372B (en) | Low-temperature ball valve with safety adjustable mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |