CN109555899A - A kind of leakage preventing mechanism for tank truck shut-off valve - Google Patents
A kind of leakage preventing mechanism for tank truck shut-off valve Download PDFInfo
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- CN109555899A CN109555899A CN201910058131.8A CN201910058131A CN109555899A CN 109555899 A CN109555899 A CN 109555899A CN 201910058131 A CN201910058131 A CN 201910058131A CN 109555899 A CN109555899 A CN 109555899A
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- circle
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- gasket
- shut
- extruding
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- 230000007246 mechanism Effects 0.000 title claims abstract description 27
- 238000003825 pressing Methods 0.000 claims abstract description 31
- 230000000694 effects Effects 0.000 claims abstract description 20
- 238000010092 rubber production Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of leakage preventing mechanisms for tank truck shut-off valve, are related to valve technology field, comprising: shut-off valve valve rod base, valve rod, pressing plate, guiding collar, pressure energizing gasket and handwheel；Guiding collar and pressure energizing gasket are sequentially arranged in shut-off valve valve rod base mounting hole；Pressing plate is placed on shut-off valve valve rod base middle position, and applies extruding force to pressure energizing gasket；Valve rod runs through the mounting hole of shut-off valve valve rod base and runs through guiding collar, pressure energizing gasket and pressing plate together；Handwheel is installed on valve rod upper end；The technical program is used for the leakage preventing mechanism of tank truck shut-off valve by the design of pressure energizing gasket, can make voluntarily to improve sealing effect when pressure increases in shut-off valve, preferably prevent the oil leak in tank truck.
Description
Technical field
The present invention relates to valve technology field, especially a kind of leakage preventing mechanism for tank truck shut-off valve.
Background technique
Oil plant is readily volatilized under high temperature environment, and especially tank truck becomes apparent when transporting oil plant in summer, especially
It is the leakage phenomenon for often all occurring oil plant at the sealing ring of valve；Therefore the leakage of oil plant can only constantly add in order to prevent
The sealing effect of strong valve；
A kind of shut-off valve leakproof machine for tank truck emergency cut-off as disclosed in Chinese invention patent CN 207178725U
Structure is related to valve technology field, comprising: shut-off valve valve rod base, valve rod, pressing plate, guiding collar, pagoda washer, rigid seal circle
And handwheel；Guiding collar, pagoda washer and rigid seal circle are sequentially arranged inside shut-off valve valve rod base；Pressing plate is placed in shut-off valve
Valve rod base middle position；Valve rod from shut-off valve valve rod base bottom be inserted through mounted guiding collar, pagoda washer and just
Property sealing ring inner ring, and pressing plate is passed through, until being pierced by the top of shut-off valve valve rod base；Handwheel is installed on valve rod upper end.
But valve can only improve sealing effect by constantly increasing the quantity of sealing ring in technology disclosed above, work as oil
Pressure increase in tank car can only be coped with when generating leakage by constantly tightening can not be when tank truck internal pressure increases
Sealing effect can not voluntarily be improved.
Summary of the invention
One, technical problems to be solved
The purpose of the present invention is provide a kind of for tank truck shut-off valve for drawbacks described above present in the prior art
Leakage preventing mechanism, solve the problems, such as tank truck internal pressure increase when can not voluntarily improve sealing effect.
Two, technical solution
In order to solve the above technical problems, the present invention provides a kind of leakage preventing mechanism for tank truck shut-off valve, comprising: cut-off
Valve valve rod base, valve rod, pressing plate, guiding collar, pressure energizing gasket and handwheel；
Guiding collar and pressure energizing gasket are sequentially arranged in shut-off valve valve rod base mounting hole；
Pressing plate is placed on shut-off valve valve rod base middle position, and applies extruding force to pressure energizing gasket；
Valve rod runs through the mounting hole of shut-off valve valve rod base and runs through guiding collar, pressure energizing gasket and pressing plate together；
Handwheel is installed on valve rod upper end；
Pressure energizing gasket include: upper extruding circle, upper extruded gasket, middle extruding circle, middle extruded gasket, lower extruded gasket and it is lower squeeze
Pressing ring；
Upper extruding circle, upper extruded gasket, middle extruding circle, lower extruded gasket and lower extruding circle are sequentially overlapped setting；
Upper extruding circle and middle extruding circle form upper extruded gasket and squeeze, and form extruded gasket and are squeezed and deformed effect；
Lower extruding circle and middle extruding circle form lower extruded gasket and squeeze, and form lower extruded gasket and are squeezed and deformed effect；
Middle extruding snare is set on middle extruded gasket, and the middle inner circle for squeezing circle is bonded with the outer circle of middle extruded gasket；
The both ends of middle extruded gasket, which are respectively held against, squeezes circle and the lower one end for squeezing circle, upper extruding circle and lower extruding circle
Centering extruded gasket, which is formed, to be squeezed, and is formed middle extruded gasket and is squeezed and deformed effect.
The technical program is used for the leakage preventing mechanism of tank truck shut-off valve by the design of pressure energizing gasket, can make in shut-off valve
Pressure voluntarily improves sealing effect when increasing, and preferably prevents the oil leak in tank truck.
Wherein, upper extruding circle and lower extruding circle are equipped with flange collar；
Flange collar is in middle extruding circle inner circle, and flange collar can be slided in the middle inner circle for squeezing circle.
The technical program is used for the leakage preventing mechanism of tank truck shut-off valve by the design of flange collar, makes to squeeze circle and middle extruding
Circle, which squeezes the formation of upper extruded gasket center when forming extruding to lower extruded gasket with lower extruding circle and middle extruding circle, to be occurred
Offset.
Wherein, first is offered on the outer circle side of the upper junction for squeezing circle and the lower ontology for squeezing circle and flange collar to fall
Angle；
The second chamfering is offered on the inner circle side at the middle both ends for squeezing circle；
Upper extruded gasket and lower extruded gasket one end outer circle side offer third chamfering identical with the second chamfer angle；
Other end inner circle side offers 4th chamfering identical with the first chamfer angle；
After upper extruding circle, upper extruded gasket, middle extruding circle, lower extruded gasket and lower extruding circle are sequentially overlapped, the first chamfering
It is bonded with 4th chamfering；Second chamfering is bonded with third chamfering.
The technical program is used for the leakage preventing mechanism of tank truck shut-off valve by the design of chamfering, makes to squeeze circle, upper extruding
Washer, middle extruding circle, lower extruded gasket and lower extrudings circle are formed when squeezing, and the crowded of extruded gasket and lower extruded gasket can be made
Compressive strain has certain directionality.
Wherein, pressing plate inner ring offers dust-proof seal ring card slot, and dust-proof seal ring card slot is equipped with dust-proof seal ring.
Leakage preventing mechanism of the technical program for tank truck shut-off valve can by the way that the design of dust-proof seal ring is arranged on pressing plate
Effectively the travel fatigue on valve rod to be struck off.
Wherein, one end face of pressing plate is additionally provided with extruding boss, squeezes boss and is used to be embedded in the mounting hole of shut-off valve valve rod base simultaneously
Trend is pressed down against to pressure energizing gasket formation.
Wherein, it is connected between shut-off valve valve rod base and pressing plate by screw bolt and nut, tightening nut can make to squeeze boss pair
Pressure energizing gasket is pressed down against.
Leakage preventing mechanism of the technical program for tank truck shut-off valve makes pressing plate pair by the way that the design of boss is arranged on pressing plate
There is pressure energizing gasket the effect that is pressed further by improve sealing effect.
Wherein, upper extruded gasket, middle extruded gasket and lower extruded gasket are rubber production.
Wherein, the rubber hardness of upper extruded gasket, middle extruded gasket and lower extruded gasket is 57 degree.
Leakage preventing mechanism of the technical program for tank truck shut-off valve passes through upper extruded gasket, middle extruded gasket and lower extruding
The rubber production that it is 57 degree that washer, which is by hardness, has extruded gasket, middle extruded gasket and lower extruded gasket better
Wearability.
Wherein, the angle of the first chamfering is 150 degree to 170 degree；
The angle of second chamfering is 50 degree to 70 degree.
Leakage preventing mechanism of the technical program for tank truck shut-off valve is specific by selecting to the first chamfering and the second chamfering
Angle design, keep the deformation effect of extruded gasket, middle extruded gasket and lower extruded gasket when receiving extruding more preferable.
Detailed description of the invention
Fig. 1 is the leakage preventing mechanism overall structure figure that the present invention is used for tank truck shut-off valve；
Fig. 2 is the leakage preventing mechanism full sectional view that the present invention is used for tank truck shut-off valve；
Fig. 3 is the explosive view of pressure energizing gasket of the invention；
Fig. 4 is the squeezing effect schematic diagram after pressure energizing gasket complete section of the invention；
Fig. 5 is the structural schematic diagram of shut-off valve valve rod base of the invention；
Fig. 6 is pressing plate cross-sectional view of the invention；
Fig. 7 is upper extruding circle and the lower full sectional view for squeezing circle of the invention；
Fig. 8 is the full sectional view of upper extruded gasket and lower extruded gasket of the invention；
Fig. 9 is the full sectional view of middle extruding circle of the invention；
Figure 10 is the partial enlarged view of Fig. 2 of the invention；
In figure: 1 is shut-off valve valve rod base；2 be valve rod；3 be pressing plate；4 be guiding collar；5 be pressure energizing gasket；6 be hand
Wheel；11 be mounting hole；12 be pressure relief ring；13 be bolt；14 be nut；31 be dust-proof seal ring card slot；32 be dust seal
Circle；33 be boss；51 enclose for upper extruding；52 be upper extruded gasket；53 enclose for middle extruding；54 be middle extruded gasket；Under 55 are
Extruded gasket；56 enclose for lower extruding；501 be flange collar；502 be the first chamfering；503 be the second chamfering；504 be third chamfering；
505 be 4th chamfering.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example cannot be used to limit the scope of the invention for illustrating the present invention.
A kind of leakage preventing mechanism for tank truck shut-off valve of the embodiment of the present invention, as shown in Figures 1 to 10, including cut-off
Valve valve rod base 1, valve rod 2, pressing plate 3, guiding collar 4, pressure energizing gasket 5 and handwheel 6；
Guiding collar 4 and pressure energizing gasket 5 are sequentially arranged in 1 mounting hole 11 of shut-off valve valve rod base；
Pressing plate 3 is placed on 1 middle position of shut-off valve valve rod base, and applies extruding force to pressure energizing gasket 5；
Valve rod 2 runs through the mounting hole 11 of shut-off valve valve rod base 1 and runs through guiding collar 4, pressure energizing gasket 5 and pressing plate 3 together；
Handwheel 6 is installed on 2 upper end of valve rod；
After guiding collar 4 is installed in mounting hole 11, a pressure relief ring is formed in shut-off valve valve rod base 1 and guiding collar 4
12, when the pressure of oil pipe car increases, the oil gas in tank truck forms a thrust to guiding collar 4, at this time guiding collar 4
Pressure energizing gasket 5 will further be pushed；
Pressure energizing gasket 5 includes: upper extruding circle 51, upper extruded gasket 52, middle extruding circle 53, middle extruded gasket 54, lower extruding
Washer 55 and lower extruding circle 56；
Upper extruding circle 51, upper extruded gasket 52, middle extruding circle 53, lower extruded gasket 55 and lower extruding circle 56 are sequentially overlapped and set
It sets；
The 53 pairs of above formation of extruded gaskets 52 extruding are enclosed in upper extruding circle 51 and middle extruding, are formed extruded gasket 52 and are squeezed change
Shape effect；
Lower extruding circle 56 and middle extruding enclose 53 pairs of lower extruded gaskets 55 and form extruding, squeeze the lower formation of extruded gasket 55 and become
Shape effect；
Middle extruding circle 53 is sheathed on middle extruded gasket 54, and the outer circle of the middle inner circle for squeezing circle 53 and middle extruded gasket 54
Fitting；
The both ends of middle extruded gasket 54, which are respectively held against, squeezes circle 51 and the lower one end for squeezing circle 56, and 51 Hes are enclosed in upper extruding
Lower extruding encloses 56 centering extruded gaskets 54 and forms extruding, forms middle extruded gasket 54 and is squeezed and deformed effect.
Under the promotion of guiding collar 4, lower extruding circle 56 starts to move upwards and 51, upper extruded gasket are enclosed in upper extruding
52, middle extruding circle 53, lower extruded gasket 55 and lower extruding circle 56 form linkage effect,
Lower extruding circle 56 and middle extruding enclose 53 pairs of lower extruded gaskets 55 and form extruding, and upper extruding circle 51 and middle extruding enclose 53 pairs
Upper extruded gasket 52, which is formed, to be squeezed, and so that the outer circle of lower extruded gasket 55 and upper extruded gasket 52 is faced out deformation and is protruded, effectively
Prevent oil gas along mounting hole 11 and the lower leakage for squeezing the gap between circle 56, middle extruding circle 53 and upper extruding circle 51；
Upper extruding circle 51 and lower extruding enclose 56 centering extruded gaskets 54 and form extruding, keep middle 54 inner circle of extruded gasket inward-facing
Deformation protrudes, and effectively prevents gap leakage upper extruding circle 51 and pressing plate 3 between of the oil gas along valve rod 2；
Upper extruding circle 51 and lower extruding circle 56 are equipped with flange collar 501；
Flange collar 501 is enclosed in 53 inner circles embedded in middle extruding, and flange collar 501 can be slided in the middle inner circle for squeezing circle 53.
When being squeezed sliding, it can effectively guarantee upper extruding circle 51, middle extruding circle 53 and lower extruding circle 56 always
On a central axis, offset will not be generated.
3 inner ring of pressing plate offers dust-proof seal ring card slot 31, and dust-proof seal ring card slot 31 is equipped with dust-proof seal ring 32,
When rotation valve rod 2, valve rod 2 is exposed to the travel fatigue on the part of air section can be struck off by dust-proof seal ring 32, prevent travel fatigue into
Enter in valve body to pollute oil plant；
3 one end face of pressing plate, which is additionally provided with, squeezes boss 33, squeezes the mounting hole 11 that boss 33 is used to be embedded in shut-off valve valve rod base 1
And trend is pressed down against to the formation of pressure energizing gasket 5.
It is connected between shut-off valve valve rod base 1 and pressing plate 3 by bolt 13 and nut 14, tightening nut 14 can make to squeeze boss
33 pairs of pressure energizing gaskets 5 are pressed down against, to regulate and control the deformability of pressure energizing gasket 5, so as to adjust leakproofness.
It is upper to squeeze circle 51 and the lower ontology for squeezing circle 56 and offer first on the outer circle side of the junction of flange collar 501
Angle 502, the angle of the first chamfering 502 are 150 degree to 170 degree；
The second chamfering 503 is offered on the inner circle side at the middle both ends for squeezing circle 53；The angle of second chamfering 503 is 50 degree
To 70 degree.
Upper extruded gasket 52 and 55 one end outer circle side of lower extruded gasket offer identical with 503 angle of the second chamfering
Third chamfering 504；Other end inner circle side offers 4th chamfering 505 identical with 502 angle of the first chamfering；
Upper extruding circle 51, upper extruded gasket 52, middle extruding circle 53, lower extruded gasket 55 and lower extruding circle 56 are sequentially overlapped
Afterwards, the first chamfering 502 is bonded with 4th chamfering 505；Second chamfering 503 is bonded with third chamfering 504.
The rubber that upper extruded gasket 52, middle extruded gasket 54 and lower extruded gasket 55 are 57 degree of hardness makes.
By selecting optimal chamfer angle, pressure energizing gasket 5, can be effective under the impetus for receiving guiding collar 4
Control on extruded gasket 52 and lower extruded gasket 55 deformation direction, and extruding force reduction make to restore to mention automatically
High, 5 service life of pressure energizing gasket.
The rubber that hardness is 57 degree elasticity when meeting basic plastic deformation, which also complies with, to be made to squeeze on when extruding force reduces
Washer 52, middle extruded gasket 54 and lower extruded gasket 55 are capable of the requirement of fast quick-recovery, and the rubber that hardness is 57 degree has
Higher wear resistance.
The above is only the preferred embodiment of the present invention, it is noted that those skilled in the art are come
It says, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of leakage preventing mechanism for tank truck shut-off valve, the leakage preventing mechanism for tank truck shut-off valve includes: cut-off
Valve valve rod base (1), valve rod (2), pressing plate (3), guiding collar (4), pressure energizing gasket (5) and handwheel (6)；
The guiding collar (4) and the pressure energizing gasket (5) are sequentially arranged at shut-off valve valve rod base (1) mounting hole (11)
It is interior；
The pressing plate (3) is placed on shut-off valve valve rod base (1) middle position, and applies to the pressure energizing gasket (5) and squeeze
Power；
The valve rod (2) through the shut-off valve valve rod base (1) mounting hole (11) and together run through the guiding collar (4),
The pressure energizing gasket (5) and the pressing plate (3)；
The handwheel (6) is installed on the valve rod (2) upper end；
The pressure energizing gasket (5) includes: upper extruding circle (51), upper extruded gasket (52), middle extruding circle (53), middle extruded gasket
(54), lower extruded gasket (55) and lower extruding circle (56)；
The upper extruding circle (51), upper extruded gasket (52), middle extruding circle (53), lower extruded gasket (55) and lower extruding circle (56)
It is sequentially overlapped setting；
The upper extruding circle (51) and the middle extruding circle (53) form upper extruded gasket (52) and squeeze, and make the upper dummy block
It encloses (52) and forms extrusion deformation effect；
The lower extruding circle (56) and the middle extruding circle (53) form the lower extruded gasket (55) and squeeze, and make described lower crowded
Pressure pad circle (55), which is formed, is squeezed and deformed effect；
The middle extruding circle (53) is sheathed on the middle extruded gasket (54), and the middle inner circle for squeezing circle (53) with it is described
The outer circle of middle extruded gasket (54) is bonded；
The both ends of the middle extruded gasket (54) are respectively held against described upper one end for squeezing circle (51) and the lower extruding circle (56)
Portion, the upper extruding circle (51) and the lower extruding circle (56) form the middle extruded gasket (54) and squeeze, and make to squeeze in described
Pressure pad circle (54), which is formed, is squeezed and deformed effect.
2. being used for the leakage preventing mechanism of tank truck shut-off valve as described in claim 1, it is characterised in that: the upper extruding circle (51)
Flange collar (501) are equipped with the lower extruding circle (56)；
The flange collar (501) is in described middle extruding circle (53) inner circle, and flange collar (501) can be enclosed in the middle extruding
(53) sliding in inner circle.
3. being used for the leakage preventing mechanism of tank truck shut-off valve as claimed in claim 2, it is characterised in that: the upper extruding circle (51)
The first chamfering is offered on the lower ontology for squeezing circle (56) and the outer circle side of the junction of the flange collar (501)
(502)；
The second chamfering (503) are offered on the inner circle side at the middle both ends for squeezing circle (53)；
The upper extruded gasket (52) and the lower extruded gasket (55) one end outer circle side offer and the second chamfering (503) angle
Spend identical third chamfering (504)；Other end inner circle side offers 4th chamfering identical with the first chamfering (502) angle
(505)；
The upper extruding circle (51), upper extruded gasket (52), middle extruding circle (53), lower extruded gasket (55) and lower extruding circle (56)
After being sequentially overlapped, first chamfering (502) is bonded with the 4th chamfering (505)；Second chamfering (503) and described the
Three chamferings (504) fitting.
4. being used for the leakage preventing mechanism of tank truck shut-off valve as claimed in claim 3, it is characterised in that: pressing plate (3) inner ring
It offers dust-proof seal ring card slot (31), dust-proof seal ring card slot (31) is equipped with dust-proof seal ring (32).
5. being used for the leakage preventing mechanism of tank truck shut-off valve as claimed in claim 4, it is characterised in that: described pressing plate (3) one end
Face, which is additionally provided with, squeezes boss (33), the mounting hole (11) for squeezing boss (33) and being used to be embedded in the shut-off valve valve rod base (1)
And the pressure energizing gasket (5) are formed and are pressed down against trend.
6. being used for the leakage preventing mechanism of tank truck shut-off valve as claimed in claim 5, it is characterised in that: shut-off valve valve rod base (1)
It is connected between the pressing plate (3) by bolt (13) and nut (14), the extruding boss can be made by tightening the nut (14)
(33) pressure energizing gasket (5) is pressed down against.
7. being used for the leakage preventing mechanism of tank truck shut-off valve as described in claim 6, it is characterised in that: the upper extruded gasket
(52), middle extruded gasket (54) and lower extruded gasket (55) are rubber production.
8. being used for the leakage preventing mechanism of tank truck shut-off valve as claimed in claim 7, it is characterised in that: the upper extruded gasket
(52), the rubber hardness of middle extruded gasket (54) and lower extruded gasket (55) is 57 degree.
9. being used for the leakage preventing mechanism of tank truck shut-off valve as claimed in claim 8, it is characterised in that: first chamfering
(502) angle is 150 degree to 170 degree；
The angle of second chamfering (503) is 50 degree to 70 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910058131.8A CN109555899B (en) | 2019-01-22 | 2019-01-22 | Leakage-proof mechanism for stop valve of oil tank truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910058131.8A CN109555899B (en) | 2019-01-22 | 2019-01-22 | Leakage-proof mechanism for stop valve of oil tank truck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109555899A true CN109555899A (en) | 2019-04-02 |
| CN109555899B CN109555899B (en) | 2023-12-12 |
Family
ID=65873406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910058131.8A Active CN109555899B (en) | 2019-01-22 | 2019-01-22 | Leakage-proof mechanism for stop valve of oil tank truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109555899B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210116A (en) * | 1987-09-18 | 1989-06-01 | Fmc Corp | Seal |
| JP2007016883A (en) * | 2005-07-07 | 2007-01-25 | Seibu Gas Co Ltd | Block joint for piping interior |
| CN203348714U (en) * | 2013-07-02 | 2013-12-18 | 保一集团有限公司 | Multiple-sealing plug valve |
| CN207178725U (en) * | 2017-08-29 | 2018-04-03 | 浙江镇石物流有限公司 | A kind of stop valve leakage preventing mechanism for oil truck emergency cut-off |
| KR20180098716A (en) * | 2017-02-27 | 2018-09-05 | 주식회사 대정밸브 | Packing for ultra high pressure valve |
| CN108708979A (en) * | 2018-08-01 | 2018-10-26 | 周君 | Bidirection press self-balance stop valve |
| CN209622191U (en) * | 2019-01-22 | 2019-11-12 | 浙江镇石物流有限公司 | A kind of leakage preventing mechanism for tank truck shut-off valve |
-
2019
- 2019-01-22 CN CN201910058131.8A patent/CN109555899B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210116A (en) * | 1987-09-18 | 1989-06-01 | Fmc Corp | Seal |
| JP2007016883A (en) * | 2005-07-07 | 2007-01-25 | Seibu Gas Co Ltd | Block joint for piping interior |
| CN203348714U (en) * | 2013-07-02 | 2013-12-18 | 保一集团有限公司 | Multiple-sealing plug valve |
| KR20180098716A (en) * | 2017-02-27 | 2018-09-05 | 주식회사 대정밸브 | Packing for ultra high pressure valve |
| CN207178725U (en) * | 2017-08-29 | 2018-04-03 | 浙江镇石物流有限公司 | A kind of stop valve leakage preventing mechanism for oil truck emergency cut-off |
| CN108708979A (en) * | 2018-08-01 | 2018-10-26 | 周君 | Bidirection press self-balance stop valve |
| CN209622191U (en) * | 2019-01-22 | 2019-11-12 | 浙江镇石物流有限公司 | A kind of leakage preventing mechanism for tank truck shut-off valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109555899B (en) | 2023-12-12 |
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