CN201810945U

CN201810945U - Liquefied natural gas (LNG) vehicle fueling station low-temperature pipe valve cold insulation device

Info

Publication number: CN201810945U
Application number: CN2010205332640U
Authority: CN
Inventors: 杨文波
Original assignee: SICHUAN JINKE CRYOGENIC ENGINEERING CO LTD
Current assignee: SICHUAN JINKE CRYOGENIC ENGINEERING CO LTD
Priority date: 2010-09-17
Filing date: 2010-09-17
Publication date: 2011-04-27
Anticipated expiration: 2020-09-17

Abstract

The utility model discloses a liquefied natural gas (LNG) vehicle fueling station low-temperature pipe valve cold insulation device, which is used during a process of conveying low-temperature liquefied natural gas and can facilitate maintenance. The LNG vehicle fueling station low-temperature pipe valve cold insulation device comprises a low-temperature pipe and a cold insulation box, the low-temperature pipe is arranged in the cold insulation box, and a thermal insulation layer is further disposed in the cold insulation box. When flowing through the low-temperature pipe, the low-temperature liquefied natural gas in the low-temperature pipe is in thermal insulation and cold insulation by the aid of the cold insulation box and the thermal insulation layer, simultaneously, nitrogen can further be filled in the cold insulation box to increase cold insulation effect, and when the thermal insulation layer is broken and fine cold insulation effect cannot be guaranteed, the thermal insulation layer can be replaced by a new thermal insulation layer. Moreover, operators can enter the cold insulation box through a manhole to repair the low-temperature pipe and a pipe valve, thereby achieving the purpose of bringing convenience for maintenance and reducing service cost of the total device. In addition, the LNG vehicle fueling station low-temperature pipe valve cold insulation device is particularly suitable to be popularized and applied to occasions conveying the low-temperature liquefied natural gas.

Description

LNG Vehicle Fueling Station low temperature pipe valve cold insulation device

Technical field

The utility model relates to a kind of cold insulation device, is specifically related to a kind of LNG Vehicle Fueling Station low temperature pipe valve cold insulation device that uses in transporting low temperature LNG Liquefied natural gas process.

Background technique

At present, rock gas is the inflammable gas of exploiting out naturally in the gas field, and main component is made up of methane, belongs to flammable explosive gas.LNG (Liquefied natural gas, be the english abbreviation of LNG Liquefied natural gas) then be cooled to-162 ℃ by natural gas in gaseous state under normal pressure, make it to condense into liquid, after the natural gas liquefaction, its volume be about liquefaction before 1/625, can save storage and transportation space and cost greatly, and have characteristics such as calorific value is big, performance height.As the environmental type energy of a kind of high-quality, efficient, cleaning, the rock gas industry has become the economic focus that various countries, the world today pay close attention to.But right-162 ℃ of LNG Liquefied natural gas are carried out the processing of large-scale engineering cold insulation, are one of key technologies in the whole project of LNG.

In the prior art LNG Liquefied natural gas is carried out cold insulation and handle one employing high-vacuum insulation pipeline, be that liquified natural gas passes through from inner layer pipe, one deck heat-insulating pipeline is set outside this inner layer pipe again, between heat-insulating pipeline and inner layer pipe, vacuumize processing, but after long-term the use, in case vacuum section is destroyed, whole device is also just scrapped.

The model utility content

Technical problem to be solved in the utility model provides a kind of LNG Vehicle Fueling Station low temperature pipe valve cold insulation device of being convenient to safeguard.

The technological scheme that its technical problem that solves the utility model adopts is: LNG Vehicle Fueling Station low temperature pipe valve cold insulation device, comprise cryogenic piping, and also comprise the cold insulation casing, described cryogenic piping is arranged in the cold insulation casing, is provided with heat insulation layer in the cold insulation casing.

Further be on the cold insulation casing, to offer manhole.

Further be that described heat insulation layer adopts pearlife to make.

Further be on the cold insulation casing, to offer feeding port.

Further be on the cold insulation casing, to offer discharge opening.

Further be that the cold insulation casing is provided with pressure relief device.

Further be on the cold insulation casing, pressure gauge to be housed.

Further be that the cold insulation casing is provided with the nitrogen inflation inlet.

Further be, cryogenic piping has many and correspondence and is connected with a plurality of pipeline valves, and the operation handwheel of each pipeline valve all is arranged on the outside of cold insulation casing.

The beneficial effects of the utility model are: by the setting of cold insulation casing, then the LNG Liquefied natural gas of low temperature is through cryogenic piping the time, by cold insulation casing and heat insulation layer the LNG Liquefied natural gas in the cryogenic piping being carried out cold insulation handles, simultaneously, can also in the cold insulation casing, improve the cold insulation effect by filling nitrogen, when heat insulation layer destroyed and can not play good cold insulation and do the time spent, replaceable new heat insulation layer; And operator can enter in the cold insulation casing by manhole cryogenic piping and pipeline valve are overhauled, thereby reach purpose easy to maintenance, have reduced the user cost of whole device, and the occasion that is particluarly suitable for the transporting low temperature LNG Liquefied natural gas is applied.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the plan view of Fig. 1.

Be labeled as among the figure: cryogenic piping 1, cold insulation casing 2, heat insulation layer 3, manhole 4, discharge opening 5, operation handwheel 6, pressure relief device 7, feeding port 8, pressure gauge 9, nitrogen inflation inlet 10.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

As Fig. 1 and shown in Figure 2, LNG Vehicle Fueling Station low temperature pipe valve cold insulation device of the present utility model comprises cryogenic piping 1, also comprises cold insulation casing 2, and described cryogenic piping 1 is arranged in the cold insulation casing 2, is provided with heat insulation layer 3 in cold insulation casing 2.Then the LNG Liquefied natural gas of low temperature is through cryogenic piping 1 time, by cold insulation casing 2 and be filled in LNG Liquefied natural gas in 3 pairs of cryogenic pipings of heat insulation layer 1 in the cold insulation casing 2 and carry out cold insulation and handle, when heat insulation layer 3 destroyed and can not play good cold insulation and do the time spent, replaceable new heat insulation layer 3, thereby reach purpose easy to maintenance, reduced the user cost of whole device.In addition, for improving the cold insulation effect, on cold insulation casing 2, also be provided with nitrogen inflation inlet 10, by filling nitrogen in cold insulation casing 2 so that keep micro positive pressures in the cold insulation casing 2, thereby prevent that malaria from entering destruction insulation effect in the cold insulation casing 2, improves the cold insulation effect.

For ease of the member in the cold insulation casing 2 is safeguarded, on cold insulation casing 2, offer manhole 4.Under the normal condition, manhole 4 is in closed condition, and when cryogenic piping in the cold insulation casing 21 or pipeline valve generation leakage, operator can enter in the cold insulation casing 2 by manhole 4, and cryogenic piping 1 or pipeline valve are keeped in repair.

In the above embodiment, heat insulation layer 3 can adopt multiple cold insulation material to make, and as optimal way, described heat insulation layer 3 adopts pearlife to make.It has do not burn, advantage such as intensity height, long service life.

On the basis of above mode of execution, on cold insulation casing 2, offer feeding port 8, after heat insulation layer 3 is destroyed, can in cold insulation casings 2, fill new heat insulation layer material by opening feeding port 8.Simultaneously, can also offer discharge opening 5 on cold insulation casing 2, under the normal condition, discharge opening 5 sealing after heat insulation layer 3 is destroyed, can be arrived outside the cold insulation casing 2 by the heat insulation layer material delivery after opening discharge opening 5 and will destroying.

For guaranteeing the Security of equipment, cold insulation casing 2 is provided with pressure relief device 7.In normal operation, this pressure relief device 7 is in closed condition, when the cryogenic piping in the cold insulation casing 21 or pipeline valve leak and when causing that cold insulation casing 2 internal pressures raise, pressure relief device 7 will be opened automatically, thereby guarantees the safety of whole device.

Pressure for ease of in the monitoring cold insulation casing 2 is equipped with pressure gauge 9 on cold insulation casing 2.

On the basis that cold insulation casing 2 is set, cryogenic piping 1 has many and correspondence and is connected with a plurality of pipeline valves, and the operation handwheel 6 of each pipeline valve all is arranged on the outside of cold insulation casing 2.Like this, can make things convenient for the staff that pipeline valve is controlled.

Claims

1.LNG Vehicle Fueling Station low temperature pipe valve cold insulation device comprises cryogenic piping (1), it is characterized in that: also comprise cold insulation casing (2), described cryogenic piping (1) is arranged in the cold insulation casing (2), is provided with heat insulation layer (3) in cold insulation casing (2).

2. LNG Vehicle Fueling Station low temperature pipe valve cold insulation device as claimed in claim 1 is characterized in that: offer manhole (4) on cold insulation casing (2).

3. LNG Vehicle Fueling Station low temperature pipe valve cold insulation device as claimed in claim 2 is characterized in that: described heat insulation layer (3) adopts pearlife to make.

4. LNG Vehicle Fueling Station low temperature pipe valve cold insulation device as claimed in claim 1 is characterized in that: offer feeding port (8) on cold insulation casing (2).

5. LNG Vehicle Fueling Station low temperature pipe valve cold insulation device as claimed in claim 4 is characterized in that: offer discharge opening (5) on cold insulation casing (2).

6. LNG Vehicle Fueling Station low temperature pipe valve cold insulation device as claimed in claim 1, it is characterized in that: cold insulation casing (2) is provided with pressure relief device (7).

7. LNG Vehicle Fueling Station low temperature pipe valve cold insulation device as claimed in claim 1 is characterized in that: pressure gauge (9) is housed on cold insulation casing (2).

8. LNG Vehicle Fueling Station low temperature pipe valve cold insulation device as claimed in claim 1, it is characterized in that: cold insulation casing (2) is provided with nitrogen inflation inlet (10).

9. according to any described LNG Vehicle Fueling Station of claim low temperature pipe valve cold insulation device in the claim 1 to 8, it is characterized in that: cryogenic piping (1) has many and correspondence and is connected with a plurality of pipeline valves, and the operation handwheel (6) of each pipeline valve all is arranged on the outside of cold insulation casing (2).