CN204729699U - Low temperature return-air valve in LNG storage tank - Google Patents
Low temperature return-air valve in LNG storage tank Download PDFInfo
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- CN204729699U CN204729699U CN201520317970.4U CN201520317970U CN204729699U CN 204729699 U CN204729699 U CN 204729699U CN 201520317970 U CN201520317970 U CN 201520317970U CN 204729699 U CN204729699 U CN 204729699U
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- valve
- spool
- storage tank
- low temperature
- temperature return
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Abstract
The utility model discloses the low temperature return-air valve in LNG storage tank, comprise: be installed on the valve body on storage tank gas returning port, the valve channel being communicated with storage tank inner chamber and valve outlet is provided with in valve body, the spool of band seal ring is provided with in valve channel, the pushing tow guiding device of the outside pushing tow spool of energy is provided with between spool and valve body, the sidewall of valve channel is provided with the conical seal (contact) face that can fit tightly with seal ring on spool, seal ring and conical seal (contact) face can be made to fit tightly sealing after the outside pushing tow spool of pushing tow guiding device, the locating stud of the spiral positioning guiding groove that can screw in return-air rifle front end is respectively equipped with in the both sides of valve body, two locating studs are respectively installed with movable sheath, movable sheath can on locating stud Free-rolling.The locating stud of the low temperature return-air valve in above-mentioned LNG storage tank is set with movable sheath, thus substantially reduces the locating stud friction suffered when screwing in the spiral positioning guiding groove of return-air rifle front end, and then extend the working life of low temperature return-air valve.
Description
Technical field
The utility model relates to the low temperature return-air valve for being vented to storage tank in LNG storage tank.
Background technique
LNG is the english abbreviation of LNG Liquefied natural gas, LNG storage tank is provided with low temperature return-air valve, when needs are vented to storage tank, return-air rifle is docked with low temperature return-air valve, now return-air rifle energy pushing tow opens the spool in low temperature return-air valve, thus opens low temperature return-air valve, realizes the object that storage tank is vented.The shortcoming of the low temperature return-air valve in existing LNG storage tank is: owing to being respectively arranged with the locating stud that can screw in the spiral positioning guiding groove of return-air rifle front end in the valve body both sides of low temperature return-air valve; In the process that return-air rifle docks with low temperature return-air valve, more serious friction can be there is in locating stud with the inwall of spiral positioning guiding groove, therefore screw-in process can be caused to have some setbacks, and along with the increase of access times, locating stud can bend the phenomenon even come off, cause return-air rifle cannot dock exactly with low temperature return-air valve, thus also just cannot be vented to LNG storage tank.
Model utility content
Technical problem to be solved in the utility model is: will provide a kind of friction that can greatly reduce in docking operation suffered by locating stud, thus the low temperature return-air valve in the LNG storage tank making locating stud can screw in spiral positioning guiding groove swimmingly.
In order to solve the problem, the technical solution adopted in the utility model is: the low temperature return-air valve in LNG storage tank, comprise: be installed on the valve body on storage tank gas returning port, the valve channel being communicated with storage tank inner chamber and valve outlet is provided with in valve body, be characterized in: the spool being provided with band seal ring in valve channel, the pushing tow guiding device of the outside pushing tow spool of energy is provided with between spool and valve body, the sidewall of valve channel is provided with the conical seal (contact) face that can fit tightly with seal ring on spool, seal ring and conical seal (contact) face can be made to fit tightly sealing after the outside pushing tow spool of pushing tow guiding device, thus prevent gas in storage tank from valve channel to external leakage, the locating stud of the spiral positioning guiding groove that can screw in return-air rifle front end is respectively arranged with in the both sides of valve body, two locating studs are respectively installed with movable sheath, movable sheath can on locating stud Free-rolling.
Further, low temperature return-air valve in aforesaid LNG storage tank, wherein: the structure of pushing tow guiding device is: the spring seat that energy support spring is set in the valve channel inside spool, the return gas channel that gas can be made to pass through is provided with between spring seat and valve interior wall, the positioning boss of energy retaining spring is provided with in the outer end of spring seat, spring seat is also provided with guide through hole, the guide rod led that can match with guide through hole is provided with in the inner of spool, guide rod can make spool move along guide through hole after inserting guide through hole, the spring of the outside pushing tow spool of energy is provided with between spool and spring seat, guide rod is arranged in spring, the bottom of spring is subject to spring seat and supports and be set on positioning boss, the top of spring is against the inner living spool, be provided with the position limit pin that can make to pass outwards through guide through hole bottom guide rod in the bottom of guide rod, thus prevent spool from going out valve body.
Further, the low temperature return-air valve in aforesaid LNG storage tank, wherein: conical seal (contact) face is provided with wear-resistant material layer.
Further, the low temperature return-air valve in aforesaid LNG storage tank, wherein: wear-resistant material layer is be sprayed on the ceramic material layer on conical seal (contact) face surface.
Further, the low temperature return-air valve in aforesaid LNG storage tank, wherein: the end face outside of two locating studs is respectively arranged with the positive stop lug boss that movable sheath can be prevented from landing outside locating stud.
Further, the low temperature return-air valve in aforesaid LNG storage tank, wherein: be set with dust-prevention protecting jacket in the outside of the outlet of valve body.
Further, the low temperature return-air valve in aforesaid LNG storage tank, wherein: on the inwall of dust-prevention protecting jacket, be provided with annular groove, be provided with in annular groove can with the dust-proof seal ring of valve outer wall close contact, thus can prevent dust from entering in valve channel.
The utility model has the advantages that: the locating stud of the low temperature return-air valve in LNG storage tank described in the utility model is set with movable sheath, thus make locating stud can screw in the spiral positioning guiding groove of return-air rifle front end smoothly, greatly reduce the friction suffered by locating stud, extend the working life of this low temperature return-air valve; And the conical seal (contact) face of low temperature return-air valve is provided with wear-resistant material layer, conical seal (contact) face is is not easily worn and torn by dust plucking, thus extends the working life of this low temperature return-air valve; In addition; the valve body of low temperature return-air valve is also provided with dust-prevention protecting jacket and the dust-proof seal ring that can prevent dust from falling into valve channel; thus greatly reduce the possibility that dust falls into valve channel; to make on conical seal (contact) face not easily covered with dust, thus reduce the possibility that conical seal (contact) face worn and torn by plucking.
Accompanying drawing explanation
Fig. 1 is the structural representation of the low temperature return-air valve in LNG storage tank described in the utility model.
Fig. 2 is A-A sectional view in Fig. 1.
Embodiment
Below in conjunction with specific embodiments and the drawings, the utility model is described in further detail.
Low temperature return-air valve in LNG storage tank, as Fig. 1, shown in Fig. 2, comprise: be installed on the valve body 1 on storage tank 11 gas returning port, the valve channel 12 being communicated with storage tank 11 inner chamber and valve outlet is provided with in valve body 1, the spool 2 of band seal ring 21 is provided with in valve channel 12, the pushing tow guiding device of the outside pushing tow spool 2 of energy is provided with between spool 2 and valve body 1, the sidewall of valve channel 12 is provided with the conical seal (contact) face 3 that can fit tightly with seal ring 21 on spool 2, seal ring 21 and conical seal (contact) face 3 can be made after the outside pushing tow spool 2 of pushing tow guiding device to fit tightly sealing, thus prevent gas in storage tank 11 from valve channel 12 to external leakage, in the present embodiment, the structure of pushing tow guiding device is: the spring seat 5 arranging energy support spring in the valve channel 12 inside spool 2, the return gas channel 121 that gas can be made to pass through is provided with between spring seat 5 and valve interior wall, the positioning boss 51 of energy retaining spring is provided with in the outer end of spring seat 5, spring seat 5 is also provided with guide through hole 52, the guide rod 22 led that can match with guide through hole 52 is provided with in the inner of spool 2, spool 2 can be made to move along guide through hole 52 after guide rod 22 inserts guide through hole 52, the spring 6 of the outside pushing tow spool 2 of energy is provided with between spool 2 and spring seat 5, guide rod 22 is arranged in spring 6, the bottom of spring 6 is subject to spring seat 5 and supports and be set on positioning boss 51, the top of spring 6 is against the inner living spool 2, be provided with the position limit pin 221 that can make to pass outwards through guide through hole 52 bottom guide rod 22 in the bottom of guide rod 22, thus prevent spool 2 from going out valve body 1, the locating stud 4 of the spiral positioning guiding groove that can screw in return-air rifle front end is respectively arranged with in the both sides of valve body 1, two locating studs 4 are respectively installed with movable sheath 41, movable sheath 41 can on locating stud 4 Free-rolling, movable sheath 41 is set locating stud 4 can be made to screw in smoothly in the spiral positioning guiding groove of return-air rifle front end.
In the present embodiment, conical seal (contact) face 3 is provided with wear-resistant material layer, wear-resistant material layer can be ceramic material layer, produce time, can on conical seal (contact) face 3 spraying wear-resistant materials layer.In addition, in the present embodiment, the end face outside of two locating studs 4 is respectively arranged with the positive stop lug boss 42 that movable sheath 41 can be prevented from landing outside locating stud 4.Dust-prevention protecting jacket 7 is set with outside the outlet of valve body 1.The inwall of dust-prevention protecting jacket 7 is provided with annular groove 71; be provided with in annular groove 71 can with the dust-proof seal ring 72 of valve outer wall close contact; thus can prevent dust from entering in valve channel 12, dust-prevention protecting jacket 7 is set and dust-proof seal ring 72 can reduce the possibility that dust falls into valve channel 12 greatly.
The beneficial effects of the utility model are: the locating stud of the low temperature return-air valve in LNG storage tank described in the utility model is set with movable sheath, thus make locating stud can screw in the spiral positioning guiding groove of return-air rifle front end smoothly, greatly reduce the friction suffered by locating stud, extend the working life of this low temperature return-air valve; And the conical seal (contact) face of low temperature return-air valve is provided with wear-resistant material layer, conical seal (contact) face is is not easily worn and torn by dust plucking, thus extends the working life of this low temperature return-air valve; In addition; the valve body of low temperature return-air valve is also provided with dust-prevention protecting jacket and the dust-proof seal ring that can prevent dust from falling into valve channel; thus greatly reduce the possibility that dust falls into valve channel; to make on conical seal (contact) face not easily covered with dust, thus reduce the possibility that conical seal (contact) face worn and torn by plucking.
Claims (7)
- Low temperature return-air valve on 1.LNG storage tank, comprise: be installed on the valve body on storage tank gas returning port, the valve channel being communicated with storage tank inner chamber and valve outlet is provided with in valve body, it is characterized in that: the spool being provided with band seal ring in valve channel, the pushing tow guiding device of the outside pushing tow spool of energy is provided with between spool and valve body, the sidewall of valve channel is provided with the conical seal (contact) face that can fit tightly with seal ring on spool, seal ring and conical seal (contact) face can be made to fit tightly sealing after the outside pushing tow spool of pushing tow guiding device, thus prevent gas in storage tank from valve channel to external leakage, the locating stud of the spiral positioning guiding groove that can screw in return-air rifle front end is respectively arranged with in the both sides of valve body, two locating studs are respectively installed with movable sheath, movable sheath can on locating stud Free-rolling.
- 2. the low temperature return-air valve in LNG storage tank according to claim 1, it is characterized in that: the structure of pushing tow guiding device is: the spring seat that energy support spring is set in the valve channel inside spool, the return gas channel that gas can be made to pass through is provided with between spring seat and valve interior wall, the positioning boss of energy retaining spring is provided with in the outer end of spring seat, spring seat is also provided with guide through hole, the guide rod led that can match with guide through hole is provided with in the inner of spool, guide rod can make spool move along guide through hole after inserting guide through hole, the spring of the outside pushing tow spool of energy is provided with between spool and spring seat, guide rod is arranged in spring, the bottom of spring is subject to spring seat and supports and be set on positioning boss, the top of spring is against the inner living spool, be provided with the position limit pin that can make to pass outwards through guide through hole bottom guide rod in the bottom of guide rod, thus prevent spool from going out valve body.
- 3. the low temperature return-air valve in LNG storage tank according to claim 1 and 2, is characterized in that: conical seal (contact) face is provided with wear-resistant material layer.
- 4. the low temperature return-air valve in LNG storage tank according to claim 3, is characterized in that: wear-resistant material layer is be sprayed on the ceramic material layer on conical seal (contact) face surface.
- 5. the low temperature return-air valve in LNG storage tank according to claim 1 and 2, is characterized in that: the end face outside of two locating studs is respectively arranged with the positive stop lug boss that movable sheath can be prevented from landing outside locating stud.
- 6. the low temperature return-air valve in LNG storage tank according to claim 1 and 2, is characterized in that: be set with dust-prevention protecting jacket in the outside of the outlet of valve body.
- 7. the low temperature return-air valve in LNG storage tank according to claim 1 and 2; it is characterized in that: on the inwall of dust-prevention protecting jacket, be provided with annular groove; be provided with in annular groove can with the dust-proof seal ring of valve outer wall close contact, thus can prevent dust from entering in valve channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520317970.4U CN204729699U (en) | 2015-05-18 | 2015-05-18 | Low temperature return-air valve in LNG storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520317970.4U CN204729699U (en) | 2015-05-18 | 2015-05-18 | Low temperature return-air valve in LNG storage tank |
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| Publication Number | Publication Date |
|---|---|
| CN204729699U true CN204729699U (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520317970.4U Active CN204729699U (en) | 2015-05-18 | 2015-05-18 | Low temperature return-air valve in LNG storage tank |
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| CN (1) | CN204729699U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847937A (en) * | 2015-05-18 | 2015-08-19 | 苏州赛智达智能科技有限公司 | Low-temperature gas return valve on LNG storage tank |
| CN107269890A (en) * | 2017-06-12 | 2017-10-20 | 浙江华益精密机械股份有限公司 | A kind of Compressible sealed bolster plate swaps out water valve |
-
2015
- 2015-05-18 CN CN201520317970.4U patent/CN204729699U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847937A (en) * | 2015-05-18 | 2015-08-19 | 苏州赛智达智能科技有限公司 | Low-temperature gas return valve on LNG storage tank |
| CN104847937B (en) * | 2015-05-18 | 2017-05-03 | 苏州赛智达智能科技有限公司 | Low-temperature gas return valve on LNG storage tank |
| CN107269890A (en) * | 2017-06-12 | 2017-10-20 | 浙江华益精密机械股份有限公司 | A kind of Compressible sealed bolster plate swaps out water valve |
| CN107269890B (en) * | 2017-06-12 | 2024-03-19 | 浙江华益精密机械有限公司 | Compressible sealing backing plate water change valve |
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| GR01 | Patent grant |