CN109555899B - Leakage-proof mechanism for stop valve of oil tank truck - Google Patents
Leakage-proof mechanism for stop valve of oil tank truck Download PDFInfo
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- CN109555899B CN109555899B CN201910058131.8A CN201910058131A CN109555899B CN 109555899 B CN109555899 B CN 109555899B CN 201910058131 A CN201910058131 A CN 201910058131A CN 109555899 B CN109555899 B CN 109555899B
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- gasket
- ring
- stop valve
- valve rod
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- 230000007246 mechanism Effects 0.000 title claims abstract description 30
- 238000001125 extrusion Methods 0.000 claims abstract description 194
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 claims abstract description 20
- 230000002265 prevention Effects 0.000 claims 2
- 239000000428 dust Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008569 process 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 leakage-proof mechanism for a stop valve of an oil tank truck, which relates to the technical field of valves and comprises the following components: the stop valve comprises a stop valve rod seat, a valve rod, a pressing plate, a guide gasket, a pressurizing gasket and a hand wheel; the guide gasket and the pressurizing gasket are sequentially arranged in the mounting hole of the valve rod seat of the stop valve; the pressing plate is arranged at the middle position of the valve rod seat of the stop valve and applies extrusion force to the pressurizing gasket; the valve rod penetrates through the mounting hole of the valve rod seat of the stop valve and penetrates through the guide gasket, the pressurizing gasket and the pressing plate together; the hand wheel is arranged at the upper end part of the valve rod; the leakage-proof mechanism for the stop valve of the oil tank truck can automatically improve the sealing effect when the pressure in the stop valve is increased through the design of the pressurizing gasket, and better prevents oil leakage in the oil tank truck.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a leakage-proof mechanism for a stop valve of an oil tank truck.
Background
The oil is easy to volatilize in a high-temperature environment, particularly the oil tank truck is more obvious in the process of transporting the oil in summer, and particularly the oil leakage phenomenon often occurs at the sealing ring of the valve; therefore, the sealing effect of the valve can only be continuously enhanced to prevent oil leakage;
the invention discloses a stop valve leak protection mechanism for tank wagon emergency shut-off as disclosed in chinese invention patent CN 207178725U, relates to the valve technology field, includes: the stop valve comprises a stop valve rod seat, a valve rod, a pressing plate, a guide gasket, a pagoda gasket, a rigid sealing ring and a hand wheel; the guide gasket, the pagoda gasket and the rigid sealing ring are sequentially arranged in the valve rod seat of the stop valve; the pressing plate is arranged in the middle of the valve rod seat of the stop valve; the valve rod is inserted from the bottom of the valve rod seat of the stop valve, passes through the inner rings of the guide gasket, the pagoda gasket and the rigid sealing ring which are arranged, and passes through the pressing plate until penetrating out from the top of the valve rod seat of the stop valve; the hand wheel is installed on the upper end of the valve rod.
However, in the above-mentioned disclosed technology, the valve can only increase the sealing effect by increasing the number of sealing rings continuously, and when the pressure in the tank truck is increased to generate leakage, the valve can only be screwed down continuously to cope with the problem that the sealing effect cannot be automatically improved when the pressure in the tank truck is increased.
Disclosure of Invention
1. Technical problem to be solved
The invention aims at overcoming the defects in the prior art, and particularly provides a leakage-proof mechanism for a stop valve of an oil tank truck, which solves the problem that the sealing effect cannot be automatically improved when the internal pressure of the oil tank truck is increased.
2. Technical proposal
In order to solve the technical problems, the invention provides a leakage-proof mechanism for a stop valve of an oil tank truck, which comprises: the stop valve comprises a stop valve rod seat, a valve rod, a pressing plate, a guide gasket, a pressurizing gasket and a hand wheel;
the guide gasket and the pressurizing gasket are sequentially arranged in the mounting hole of the valve rod seat of the stop valve;
the pressing plate is arranged at the middle position of the valve rod seat of the stop valve and applies extrusion force to the pressurizing gasket;
the valve rod penetrates through the mounting hole of the valve rod seat of the stop valve and penetrates through the guide gasket, the pressurizing gasket and the pressing plate together;
the hand wheel is arranged at the upper end part of the valve rod;
the booster gasket includes: an upper extrusion ring, an upper extrusion washer, a middle extrusion ring, a middle extrusion washer, a lower extrusion washer and a lower extrusion ring;
the upper extrusion ring, the upper extrusion washer, the middle extrusion ring, the lower extrusion washer and the lower extrusion ring are sequentially overlapped;
the upper extrusion ring and the middle extrusion ring extrude the upper extrusion washer, so that the upper extrusion washer forms an extrusion deformation effect;
the lower extrusion ring and the middle extrusion ring extrude the lower extrusion gasket, so that the lower extrusion gasket forms an extrusion deformation effect;
the middle extrusion ring is sleeved on the middle extrusion gasket, and the inner circle of the middle extrusion ring is attached to the outer circle of the middle extrusion gasket;
the two ends of the middle extrusion gasket are respectively propped against one end parts of the upper extrusion ring and the lower extrusion ring, and the upper extrusion ring and the lower extrusion ring extrude the middle extrusion gasket to form extrusion deformation effect.
The leakage-proof mechanism for the stop valve of the oil tank truck can automatically improve the sealing effect when the pressure in the stop valve is increased through the design of the pressurizing gasket, and better prevents oil leakage in the oil tank truck.
Wherein, the upper extrusion ring and the lower extrusion ring are both provided with convex rings;
the convex ring is embedded in the inner circle of the middle extrusion ring, and the convex ring can slide in the inner circle of the middle extrusion ring.
The leakage-proof mechanism for the stop valve of the oil tank truck is characterized in that the upper extrusion ring and the middle extrusion ring form extrusion with the upper extrusion washer and the lower extrusion ring and the middle extrusion ring form extrusion with the lower extrusion washer through the design of the convex ring, so that the center of the leakage-proof mechanism cannot deviate.
Wherein, the outer circle sides of the junction of the body of the upper extrusion ring and the lower extrusion ring and the convex ring are provided with first chamfers;
second chamfers are respectively arranged on the inner circle sides of the two ends of the middle extrusion ring;
the outer circular sides of one end of the upper extrusion gasket and one end of the lower extrusion gasket are respectively provided with a third chamfer angle which is the same as the second chamfer angle; the inner circle side of the other end is provided with a fourth chamfer angle which is the same as the first chamfer angle;
the upper extrusion ring, the upper extrusion gasket, the middle extrusion ring, the lower extrusion gasket and the lower extrusion ring are sequentially overlapped, and then the first chamfer is attached to the fourth chamfer; the second chamfer is attached to the third chamfer.
The leakage-proof mechanism for the stop valve of the oil tank truck is designed through the chamfer angle, so that when the upper extrusion ring, the upper extrusion washer, the middle extrusion ring, the lower extrusion washer and the lower extrusion ring form extrusion, the extrusion deformation of the upper extrusion washer and the lower extrusion washer can have certain directivity.
Wherein, dustproof sealing ring draw-in groove has been seted up to the clamp plate inner circle, is equipped with dustproof sealing ring on the dustproof sealing ring draw-in groove.
The leakage-proof mechanism for the stop valve of the oil tank truck can effectively scrape off wind dust on the valve rod through the design that the dustproof sealing ring is arranged on the pressing plate.
And one end surface of the pressing plate is also provided with an extrusion boss, and the extrusion boss is used for being embedded into a mounting hole of the valve rod seat of the stop valve and forms a downward extrusion trend on the pressurizing gasket.
The stop valve rod seat is connected with the pressing plate through bolts and nuts, and the pressing boss can be pressed downwards by tightening the nuts to press the pressurizing gasket.
The leakage-proof mechanism for the stop valve of the oil tank truck has the advantages that the design that the boss is arranged on the pressing plate enables the pressing plate to have a further extrusion effect on the pressurizing gasket, and the sealing effect is improved.
Wherein, the upper extrusion gasket, the middle extrusion gasket and the lower extrusion gasket are all made of rubber.
Wherein, the rubber hardness of the upper pressing washer, the middle pressing washer and the lower pressing washer is 57 degrees.
The leakage-proof mechanism for the stop valve of the oil tank truck is made of rubber with the hardness of 57 degrees through the upper extrusion gasket, the middle extrusion gasket and the lower extrusion gasket, so that the upper extrusion gasket, the middle extrusion gasket and the lower extrusion gasket have better wear resistance.
Wherein the angle of the first chamfer is 150 degrees to 170 degrees;
the angle of the second chamfer is 50 degrees to 70 degrees.
The leakage-proof mechanism for the stop valve of the oil tank truck has the advantages that the leakage-proof mechanism is designed by selecting specific angles for the first chamfer and the second chamfer, so that the deformation effect of the upper extrusion gasket, the middle extrusion gasket and the lower extrusion gasket when extrusion is received is better.
Drawings
FIG. 1 is a block diagram of the leak-proof mechanism for the tank truck stop valve of the present invention;
FIG. 2 is a full cross-sectional view of the leak-proof mechanism for the tank truck stop valve of the present invention;
FIG. 3 is an exploded view of the booster gasket of the present invention;
FIG. 4 is a schematic illustration of the extrusion effect of the booster gasket of the present invention after full section;
FIG. 5 is a schematic view of the structure of the valve stem seat of the stop valve of the present invention;
FIG. 6 is a cross-sectional view of a platen of the present invention;
FIG. 7 is a full cross-sectional view of the upper and lower squeeze rings of the present invention;
FIG. 8 is a full cross-sectional view of the upper and lower compression washers of the present invention;
FIG. 9 is a full cross-sectional view of the intermediate extrusion ring of the present invention;
FIG. 10 is an enlarged view of a portion of FIG. 2 in accordance with the present invention;
in the figure: 1 is a valve rod seat of a stop valve; 2 is a valve rod; 3 is a pressing plate; 4 is a guide gasket; 5 is a pressurizing gasket; 6 is a hand wheel; 11 is a mounting hole; 12 is a pressure release ring; 13 is a bolt; 14 is a nut; 31 is a dustproof sealing ring clamping groove; 32 is a dustproof sealing ring; 33 is a boss; 51. is an upper extrusion ring; 52 is an upper squeeze washer; 53 is a middle extrusion ring; 54 is a middle extrusion gasket; 55 is a lower extrusion washer; 56 is a lower extrusion ring; 501 is a convex ring; 502 is a first chamfer; 503. is a second chamfer; 504 is a third chamfer; and 505 is a fourth chamfer.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.
The invention relates to a leakage-proof mechanism for a stop valve of an oil tank truck, which is shown in figures 1 to 10 and comprises a stop valve rod seat 1, a valve rod 2, a pressing plate 3, a guide gasket 4, a pressurizing gasket 5 and a hand wheel 6;
the guide gasket 4 and the pressurizing gasket 5 are sequentially arranged in the mounting hole 11 of the stop valve stem seat 1;
the pressing plate 3 is arranged at the middle position of the stop valve rod seat 1 and applies extrusion force to the pressurizing gasket 5;
the valve rod 2 penetrates through the mounting hole 11 of the stop valve rod seat 1 and penetrates through the guide gasket 4, the pressurizing gasket 5 and the pressing plate 3 together;
the hand wheel 6 is arranged at the upper end part of the valve rod 2;
after the guide gasket 4 is arranged in the mounting hole 11, a pressure relief ring 12 is formed between the stop valve stem seat 1 and the guide gasket 4, when the pressure in the oil pipe truck is increased, oil gas in the oil tank truck forms a thrust force on the guide gasket 4, and at the moment, the guide gasket 4 can further push the pressurizing gasket 5;
the booster gasket 5 includes: an upper pressing ring 51, an upper pressing washer 52, a middle pressing ring 53, a middle pressing washer 54, a lower pressing washer 55, and a lower pressing ring 56;
the upper extrusion ring 51, the upper extrusion washer 52, the middle extrusion ring 53, the lower extrusion washer 55 and the lower extrusion ring 56 are sequentially overlapped;
the upper extrusion ring 51 and the middle extrusion ring 53 extrude the upper extrusion washer 52, so that the upper extrusion washer 52 has extrusion deformation effect;
the lower extrusion ring 56 and the middle extrusion ring 53 extrude the lower extrusion gasket 55, so that the lower extrusion gasket 55 forms extrusion deformation effect;
the middle extrusion ring 53 is sleeved on the middle extrusion washer 54, and the inner circle of the middle extrusion ring 53 is attached to the outer circle of the middle extrusion washer 54;
the two ends of the middle extrusion washer 54 respectively support against one end part of the upper extrusion washer 51 and one end part of the lower extrusion washer 56, and the upper extrusion washer 51 and the lower extrusion washer 56 extrude the middle extrusion washer 54, so that the middle extrusion washer 54 forms an extrusion deformation effect.
The lower pressing ring 56 starts to move upward and the upper pressing ring 51, the upper pressing ring 52, the middle pressing ring 53, the lower pressing ring 55 and the lower pressing ring 56 form a linkage effect under the pushing of the guide washer 4,
the lower extrusion ring 56 and the middle extrusion ring 53 extrude the lower extrusion gasket 55, the upper extrusion ring 51 and the middle extrusion ring 53 extrude the upper extrusion gasket 52, so that the outer circular surfaces of the lower extrusion gasket 55 and the upper extrusion gasket 52 deform outwards to protrude, and leakage of oil gas along gaps among the mounting holes 11, the lower extrusion ring 56, the middle extrusion ring 53 and the upper extrusion ring 51 is effectively prevented;
the upper extrusion ring 51 and the lower extrusion ring 56 are used for extruding the middle extrusion washer 54, so that the inner circle of the middle extrusion washer 54 is deformed inwards to protrude, and oil gas is effectively prevented from leaking along a gap between the valve rod 2 and the upper extrusion ring 51 and the pressing plate 3;
the upper extrusion ring 51 and the lower extrusion ring 56 are provided with convex rings 501;
the convex ring 501 is embedded in the inner circle of the middle pressing ring 53, and the convex ring 501 can slide in the inner circle of the middle pressing ring 53.
When the upper extrusion ring 51, the middle extrusion ring 53 and the lower extrusion ring 56 are extruded and slid, the upper extrusion ring 51, the middle extrusion ring 53 and the lower extrusion ring 56 can be effectively ensured to be always positioned on a central axis, and no offset is generated.
The inner ring of the pressing plate 3 is provided with a dustproof sealing ring clamping groove 31, the dustproof sealing ring clamping groove 31 is provided with a dustproof sealing ring 32, and when the valve rod 2 is rotated, wind dust on the part of the valve rod 2 exposed to the air section can be scraped by the dustproof sealing ring 32, so that the wind dust is prevented from entering the valve body to pollute oil;
one end surface of the pressing plate 3 is also provided with a pressing boss 33, and the pressing boss 33 is used for being embedded into the mounting hole 11 of the stop valve stem seat 1 and forming a downward pressing trend on the pressurizing gasket 5.
The stop valve stem seat 1 is connected with the pressing plate 3 through the bolts 13 and the nuts 14, and the pressing boss 33 can press the pressurizing gasket 5 downwards by tightening the nuts 14, so that the deformation degree of the pressurizing gasket 5 is regulated and controlled, and the tightness is regulated.
The outer circle sides of the junction of the bodies of the upper extrusion ring 51 and the lower extrusion ring 56 and the convex ring 501 are respectively provided with a first chamfer 502, and the angle of the first chamfer 502 is 150-170 degrees;
second chamfers 503 are formed on the inner circle sides of the two ends of the middle extrusion ring 53; the angle of the second chamfer 503 is 50 degrees to 70 degrees.
The outer circular sides of one end of the upper extrusion gasket 52 and the lower extrusion gasket 55 are respectively provided with a third chamfer 504 with the same angle as the second chamfer 503; the inner circle side of the other end is provided with a fourth chamfer 505 with the same angle as the first chamfer 502;
after the upper pressing ring 51, the upper pressing washer 52, the middle pressing ring 53, the lower pressing washer 55 and the lower pressing ring 56 are sequentially overlapped, the first chamfer 502 is attached to the fourth chamfer 505; the second chamfer 503 is attached to the third chamfer 504.
The upper pressing washer 52, the middle pressing washer 54, and the lower pressing washer 55 are made of rubber having a hardness of 57 degrees.
By selecting the optimal chamfering angle, the pressurizing gasket 5 can effectively control the deformation directions of the upper pressing gasket 52 and the lower pressing gasket 55 under the pushing action of the guiding gasket 4, and can automatically recover the service life of the pressurizing gasket 5 when the pressing force is reduced.
The rubber having a hardness of 57 degrees also meets the requirement of enabling the upper pressing washer 52, the middle pressing washer 54, and the lower pressing washer 55 to be quickly recovered when the basic plastic deformation is satisfied, and the rubber having a hardness of 57 degrees has higher abrasion resistance.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (9)
1. A leakage prevention mechanism for a tank truck stop valve, the leakage prevention mechanism for a tank truck stop valve comprising: the stop valve comprises a stop valve rod seat (1), a valve rod (2), a pressing plate (3), a guide gasket (4), a pressurizing gasket (5) and a hand wheel (6);
the guide gasket (4) and the pressurizing gasket (5) are sequentially arranged in the mounting hole (11) of the stop valve rod seat (1);
the pressing plate (3) is arranged at the middle position of the stop valve rod seat (1) and applies extrusion force to the pressurizing gasket (5);
the valve rod (2) penetrates through the mounting hole (11) of the stop valve rod seat (1) and penetrates through the guide gasket (4), the pressurizing gasket (5) and the pressing plate (3) together;
the end parts of the stop valve rod seat (1) and the guide gasket (4) form a pressure release ring (12), when the pressure in the tank truck is increased, the guide gasket (4) is pushed by the pressure release ring (12), and then the pressure boost gasket (5) is further pushed and extruded by the guide gasket (4);
the hand wheel (6) is arranged at the upper end part of the valve rod (2);
the booster gasket (5) comprises: an upper pressing ring (51), an upper pressing washer (52), a middle pressing ring (53), a middle pressing washer (54), a lower pressing washer (55) and a lower pressing ring (56);
the upper extrusion ring (51), the upper extrusion washer (52), the middle extrusion ring (53), the lower extrusion washer (55) and the lower extrusion ring (56) are sequentially overlapped;
the upper extrusion ring (51) and the middle extrusion ring (53) extrude the upper extrusion gasket (52) to ensure that the upper extrusion gasket (52) forms an extrusion deformation effect;
the lower extrusion ring (56) and the middle extrusion ring (53) extrude the lower extrusion gasket (55) to ensure that the lower extrusion gasket (55) forms an extrusion deformation effect;
the middle extrusion ring (53) is sleeved on the middle extrusion gasket (54), and the inner circle of the middle extrusion ring (53) is attached to the outer circle of the middle extrusion gasket (54);
two ends of the middle extrusion gasket (54) respectively prop against one end part of the upper extrusion ring (51) and one end part of the lower extrusion ring (56), and the upper extrusion ring (51) and the lower extrusion ring (56) extrude the middle extrusion gasket (54) so that the middle extrusion gasket (54) forms an extrusion deformation effect.
2. The leak-proof mechanism for a tank truck shutoff valve of claim 1, wherein: the upper extrusion ring (51) and the lower extrusion ring (56) are provided with convex rings (501);
the convex ring (501) is embedded in the inner circle of the middle extrusion ring (53), and the convex ring (501) can slide in the inner circle of the middle extrusion ring (53).
3. The leak-proof mechanism for a tank truck shutoff valve of claim 2, wherein: the outer circle sides of the junction of the upper extrusion ring (51) and the lower extrusion ring (56) and the convex ring (501) are respectively provided with a first chamfer angle (502);
second chamfers (503) are respectively arranged on the inner circle sides of the two ends of the middle extrusion ring (53);
the outer circular sides of one end of the upper extrusion gasket (52) and one end of the lower extrusion gasket (55) are respectively provided with a third chamfer (504) with the same angle as the second chamfer (503); the inner circle side of the other end is provided with a fourth chamfer (505) with the same angle as the first chamfer (502);
the upper extrusion ring (51), the upper extrusion gasket (52), the middle extrusion ring (53), the lower extrusion gasket (55) and the lower extrusion ring (56) are sequentially overlapped, and then the first chamfer (502) is attached to the fourth chamfer (505); the second chamfer (503) is attached to the third chamfer (504).
4. The leakage preventing mechanism for a stop valve of an oil tank truck as claimed in claim 3, wherein: the inner ring of the pressing plate (3) is provided with a dustproof sealing ring clamping groove (31), and the dustproof sealing ring clamping groove (31) is provided with a dustproof sealing ring (32).
5. The leak-proof mechanism for a tank truck shutoff valve of claim 4, wherein: an extrusion boss (33) is further arranged on one end face of the pressing plate (3), and the extrusion boss (33) is used for being embedded into the mounting hole (11) of the stop valve rod seat (1) and forming downward extrusion trend on the pressurizing gasket (5).
6. The leak-proof mechanism for a tank truck shutoff valve of claim 5, wherein: the stop valve rod seat (1) is connected with the pressing plate (3) through a bolt (13) and a nut (14), and the pressing boss (33) can press the pressurizing gasket (5) downwards by screwing the nut (14).
7. The leakage preventing mechanism for a tank truck shutoff valve of claim 6, wherein: the upper extrusion gasket (52), the middle extrusion gasket (54) and the lower extrusion gasket (55) are all made of rubber.
8. The leak-proof mechanism for a tank truck shutoff valve of claim 7, wherein: the rubber hardness of the upper pressing washer (52), the middle pressing washer (54) and the lower pressing washer (55) is 57 degrees.
9. The leak-proof mechanism for a tank truck shutoff valve of claim 8, wherein: the angle of the first chamfer (502) is 150 degrees to 170 degrees;
the angle of the second chamfer (503) is 50 degrees to 70 degrees.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN109555899A CN109555899A (en) | 2019-04-02 |
| CN109555899B true CN109555899B (en) | 2023-12-12 |
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| 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 |
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| 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 |
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|---|---|
| CN109555899A (en) | 2019-04-02 |
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