CN212869344U

CN212869344U - Fuel tank

Info

Publication number: CN212869344U
Application number: CN202021656101.1U
Authority: CN
Inventors: 孙国洪; 刘东进; 李晓晨; 徐小艳; 顾刘海; 顾华
Original assignee: China International Marine Containers Group Co Ltd; Zhangjiagang CIMC Sanctum Cryogenic Equipment Co Ltd; CIMC Enric Holding Shenzhen Co Ltd
Current assignee: China International Marine Containers Group Co Ltd; Zhangjiagang CIMC Sanctum Cryogenic Equipment Co Ltd; CIMC Enric Holding Shenzhen Co Ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-04-02
Anticipated expiration: 2030-08-11

Abstract

The utility model provides a fuel tank. The fuel tank comprises an inner tank, an outer tank, a cold box and a pipeline system. The outer tank is sleeved outside the inner tank, and an interlayer is arranged between the inner tank and the outer tank. The cold box is arranged on the outer side of the outer tank; and the pipeline system comprises an inner overflow pipe and an outer overflow pipe, one end of the inner overflow pipe is positioned in the inner tank, and the other end of the inner overflow pipe penetrates through the inner tank. The one end that interior overflow pipe is located the inner tank is equipped with a plurality of inlet structures, and the one end that interior overflow pipe wore to locate the inner tank is connected with the one end of outer overflow pipe, and the other end of outer overflow pipe passes the outer jar and accepts in the cold box. The fuel tank can reduce the volume of a pipeline system and reduce the space occupied by the fuel tank on a ship body.

Description

Fuel tank

Technical Field

The utility model relates to a clean energy field, in particular to fuel jar.

Background

At present, in order to meet the increasingly severe environmental challenges and reduce the sulfur oxide emissions in pollution emission control areas, the international maritime organization has set a series of regulations to control environmental pollution, and natural gas is used as a clean energy source and is more economical than traditional fuels such as diesel oil and the like. LNG (liquefied natural gas) fueled ships have developed rapidly in recent years, and therefore, LNG fuel tanks are mounted on the ships.

The marine LNG fuel tank generally includes an inner vessel and an outer vessel. The pipeline of the fuel tank needs to be led out from the inner container and then from the outer container. Since the fuel tank has a plurality of pipeline lines. Because the pipeline is more, mutually independent between many pipeline pipelines, occupation space is great. The LNG fuel tank occupies a large space and occupies a large space of the ship body, and the LNG fuel tank is not beneficial to application of the marine LNG fuel tank.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a less fuel jar of volume.

A fuel tank, comprising:

an inner tank;

the outer tank is sleeved on the outer side of the inner tank;

the cold box is arranged on the outer side of the outer tank; and

the pipeline system comprises an inner overflow pipe and an outer overflow pipe, one end of the inner overflow pipe is positioned in the inner tank, and the other end of the inner overflow pipe penetrates through the inner tank; the inner overflow pipe is provided with a plurality of inlet structures at one end positioned in the inner tank, the inner overflow pipe penetrates through one end of the inner tank and is connected with one end of the outer overflow pipe, and the other end of the outer overflow pipe penetrates through the outer tank and is contained in the cold box.

In one embodiment, the pipeline system further includes a connection joint, and the connection joint is disposed on the inner tank and used for communicating the inner overflow pipe and the outer overflow pipe.

In one embodiment, the overflow pipe is a double-walled pipe.

In one embodiment, one end of the overflow pipe, which is located in the cold box, is provided with a plurality of outflow branches, the heights of the outflow branches are different, and the outflow branches are provided with temperature transmitters.

In one embodiment, the piping system further comprises a controller, and the temperature transmitter is electrically connected to the controller.

In one embodiment, the plurality of inlet structures are located at different heights of the inner vessel.

In one embodiment, the inlet structure includes a first inlet structure and a second inlet structure, the first inlet structure corresponds to a height of 85% -90% of the capacity of the inner tank, and the second inlet structure corresponds to a height of 90% -95% of the capacity of the inner tank.

In one embodiment, an interlayer is arranged between the inner tank and the outer tank, and a vacuum heat insulation layer is arranged in the interlayer.

In one embodiment, the inner tank comprises an inner seal head and an inner cylinder body, and the inner overflow pipe penetrates through the inner seal head.

In one embodiment, the outer tank comprises an outer seal head and an outer cylinder body, and the overflow pipe penetrates through the outer seal head.

According to the above technical scheme, the utility model discloses following advantage and positive effect have at least:

compared with the traditional fuel tank, the fuel tank of the embodiment has the advantages that the inner overflow pipe and the outer overflow pipe in the pipeline system are in an integrated structure form, and the number of the pipelines is reduced, and the occupied space of the pipeline system is reduced. The space occupied by the entire fuel tank on the hull is reduced.

When the filling capacity of the fuel tank reaches a threshold value, the medium flows into the overflow pipe, and the overflow pipe generates primary temperature difference stress. When the filling is continued, the temperature of the outer overflow pipe cannot generate large temperature difference change because the medium is still filled in the outer overflow pipe. Therefore, the temperature difference stress of the overflow pipe is small, and the overflow pipe is prevented from being greatly deformed due to the large temperature difference stress. Therefore, the simple design workload of the pipeline system is reduced, the splicing welding seam is reduced, and meanwhile, the safety risk probability that the leakage points are more is reduced.

In addition, the interlayer space between the inner end enclosure and the outer end enclosure is reduced, the vacuum heat insulation material arranged in the interlayer is also reduced, and the manufacturing cost is reduced.

Drawings

Fig. 1 is a schematic structural view of a fuel tank of the present embodiment;

FIG. 2 is an enlarged view of a portion of the piping system of the fuel tank shown in FIG. 1;

fig. 3 is a schematic view of an electrical module of the fuel tank shown in fig. 1.

The reference numerals are explained below:

1. a fuel tank; 10. a vacuum heat insulating layer; 11. an inner tank; 111. an inner end enclosure; 112. an inner cylinder; 12. an outer tank; 121. an outer end enclosure; 122. an outer cylinder; 13. a piping system; 14. a cold box; 15. an inner overflow pipe; 151. a first end; 152. a second end; 154. a first inlet arrangement; 155. a second inlet arrangement; 16. an overflow pipe; 161. a first outflow branch; 162. a second outer stream branch; 17. connecting a joint; 18. a temperature transmitter; 181. a first temperature transmitter; 182. a second temperature transmitter; 19. and a controller.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

The utility model provides a fuel tank. Specifically, in the present embodiment, the fuel tank will be described by taking a marine LNG tank as an example. The marine LNG fuel tank generally employs a vacuum horizontal vessel. It is understood that the fuel tank is not limited to the type and model.

Referring to fig. 1 and 2, a fuel tank 1 of the present embodiment includes an inner tank 11, an outer tank 12, a pipeline system 13, and a cold box 14.

The inner tank 11 is for containing an LNG fuel medium. The inner tank 11 includes an inner head 111 and an inner cylinder 112. The inner cylinder 112 is a cylindrical tubular structure. The two inner end sockets 111 are respectively arranged at two ends of the inner cylinder 112 and seal the inner cylinder 112. The inner head 111 may be a male head. The outer surface of the inner seal head 111 is a convex seal head, such as a hemispherical, elliptical, dished, or edgeless spherical seal head.

The outer tank 12 is sleeved outside the inner tank 11. Outer tank 12 includes outer head 121 and outer cylinder 122. The shape of the outer vessel 12 is adapted to the shape of the inner vessel 11. The outer cylinder 122 has a cylindrical tubular structure. The two outer end enclosures 121 are respectively arranged at two ends of the outer cylinder 122 and seal the outer cylinder 122. The outer head 121 may be a male head. The outer surface of the outer seal head 121 is a convex seal head, such as a hemispherical, elliptical, dished, or edgeless spherical seal head.

An interlayer is present between the inner vessel 11 and the outer vessel 12. The interlayer is internally provided with a vacuum heat insulation layer 10. The vacuum insulation layer 10 serves to insulate the inner vessel 11 from temperature transfer.

The pipe system 13 of the fuel tank 1 is used to monitor the level, temperature, gas pressure, etc. of the medium in the fuel tank 1 in order to maintain safe use of the fuel tank 1. The cold box 14 is provided outside the outer tank 12. The cold box 14 is intended to receive the pipe system 13 outside the fuel tank 1. The cold box 14 is a closed space, and the fuel medium in the cold box 14 cannot directly overflow.

Specifically, in the present embodiment, the fuel tank 1 is a horizontal tank. The piping system 13 of the fuel tank 1 is provided at both end positions of the fuel tank, and is provided correspondingly to the closed end of the fuel tank 1. And the cold box 14 is also arranged outside the end enclosure corresponding to the pipe system 13.

In another embodiment, the fuel tank 1 may be a vertical tank. The corresponding pipe system 13 of the fuel tank 1 may also be provided at other locations of the fuel tank 1, such as at the top of the fuel tank 1.

The piping system 13 of the fuel tank 1 comprises an internal overflow pipe 15, an external overflow pipe 16, a connection joint 17, a temperature transmitter 18 and a controller 19. An internal overflow pipe 15 and an external overflow pipe 16 can reduce the number of pipes of the pipe system 13, so that the pipe system 13 occupies a smaller volume, and the fuel tank occupies a smaller space in the hull.

The inner overflow pipe 15 is inserted into the inner sealing head 111. One end of the inner overflow tube 15 is located within the inner vessel 11, which is a first end 151, and the other end of the inner overflow tube 15 is a second end 152. The first end 151 is provided with a plurality of inlet structures 153. A plurality of inlet structures 153 are in communication with the inner vessel 11. The plurality of inlet structures 153 are located at different heights of the inner vessel 11. When the medium of the inner vessel 11 is filled to different heights, the medium can enter the inlet structures 153 located at different heights.

Specifically, in this embodiment, the inlet structure 153 includes a first inlet structure 154 and a second inlet structure 155. The first inlet structure corresponds to the height of 85% -90% of the capacity of the inner tank, and the second inlet structure corresponds to the height of 90% -95% of the capacity of the inner tank.

Specifically, the first inlet structure 154 corresponds to a height of 89% of the capacity of the inner vessel 11. The second inlet structure 155 corresponds to a height of 94% of the capacity of the inner vessel 11. When the fuel medium fills 89% of the fuel tank 1, the height of the first inlet construction 154 corresponds to the level of the liquid in the inner tank 11 at that moment. The fuel medium may enter the first inlet arrangement 154. When the fuel medium fills 94% of the fuel tank 1, the height of the second inlet construction 155 corresponds to the level of the liquid in the inner tank 11 at that time. The fuel medium may enter the second inlet arrangement 155.

In other embodiments, the inlet structures 153 may also be 3, 4, etc. And the inlet structure 153 may correspond to other liquid level heights, where the position of the inlet structure 153 may be set according to different usage requirements.

The second end 152 of the inner overflow tube 15 is disposed through the inner closure 111 of the inner vessel 11. Specifically, in the present embodiment, the inner cap 111 is provided with a connection joint 17. The second end 152 of the inner overflow tube 15 is assembly welded to one end of the connector fitting 17. The second end 152 of the inner overflow tube 15 is connected to the inner head 111 by the connection joint 17. The connecting joint 17 is a two-sided joint, and two ends of the two-sided joint are respectively communicated with the inner overflow pipe 15 and the outer overflow pipe 16, so that the inner overflow pipe 15 is communicated and connected with the outer overflow pipe 16.

One end of the outer overflow pipe 16 is connected to the second end 152 of the inner overflow pipe 15, and the other end of the outer overflow pipe 16 passes through the outer tank 12 and is housed in the cold box 14. One end of the overflow pipe 16 is connected with the other end of the connection joint 17 in a resistance welding manner. The overflow pipe 16 is a double-walled pipe. If the inner overflow tube 15 leaks, the double walled tube ensures that the outer overflow tube 16 does not leak into the interlayer or cold box 14.

The end of the outflow pipe 16 inside the cold box 14 is provided with a plurality of outflow branches. The plurality of outflow branches differ in height. When the fuel medium flows out from the inside overflow pipe 15 and flows to the outside overflow pipe 16, the fuel medium first flows to the outside branch at the lowest level.

A temperature transmitter 18 is provided on each outflow branch. The temperature transmitter 18 is welded to the outer flow branch by assembly welding. The temperature transmitter 18 is used to sense the temperature change of the outflow branch to monitor the filling rate of the interior of the fuel tank 1. The temperature transmitter 18 can use a thermocouple or a thermal resistor as a temperature measuring element. The output signal of the temperature measuring element is sent to a transmitter module, converted into a current and voltage signal and finally output as a digital signal.

Referring to fig. 3, the temperature transmitter 18 is electrically connected to the controller 19, and the controller 19 receives the temperature signal from the temperature transmitter 18 to control the temperature transmitter 18 to turn off.

In particular, in the present embodiment, the outflow pipe 16 is provided with two outflow branches. Wherein the first outer flow branch 161 is located at a low position, and the first outer flow branch 161 is connected with a first temperature transmitter 181 for monitoring a filling rate of 89%. The second outer flow branch 162 is located at an elevated position and a second temperature transmitter 182 for monitoring a 94% fill rate is coupled to the second outer flow branch 162.

When the fuel tank 1 is filled with a medium up to 89% of its capacity, the medium will flow via the first inlet arrangement 154 into the overflow pipe 16 and into the first outflow branch 161, the first temperature transmitter 181 will send a signal to the controller 19, and the controller 19 will switch off the first temperature transmitter 181.

If the filling of the fuel tank 1 still has to be continued, when the filling medium reaches 94% of its capacity, the medium will flow into the overflow pipe 16 through the second inlet structure 155 and into the second outflow branch 162, the second temperature transmitter 182 will send a signal to the controller 19, and the controller 19 will give an instruction to stop the filling, ensuring a safe filling.

In conventional fuel tanks, a plurality of separate lines are usually provided, each line corresponding to a different filling volume level, and each line being provided with a temperature transmitter for monitoring the filling rate of the fuel tank.

Compared with the conventional fuel tank, the fuel tank 1 of the present embodiment has the advantages that the inner overflow pipe 15 and the outer overflow pipe 16 in the pipeline system 13 adopt an integrated structure, and both the inner overflow pipe 15 and the outer overflow pipe 16 are one, so that the number of pipelines is reduced, and the occupied space of the pipeline system 13 is reduced. The space of the entire fuel tank 1 occupying the hull is reduced.

In addition, in the conventional fuel tank, since each pipeline has a temperature difference stress, when designing the pipeline system 13, the flexibility, resonance, and the like of each pipeline need to be calculated, which greatly increases the design workload. In the fuel tank 1 of the present embodiment, when the filling capacity of the fuel tank 1 reaches a threshold value, the medium flows into the overflow pipe 16, and the overflow pipe 16 generates a primary temperature difference stress. When the filling is continued, the temperature of the overflow pipe 16 does not change with a large temperature difference, since the overflow pipe 16 remains filled with the medium. Therefore, the overflow pipe 16 is subjected to a smaller temperature difference stress, and the overflow pipe 16 is prevented from being subjected to a larger temperature difference stress and thus being deformed greatly. Therefore, the simple design workload of the pipeline system 13 is reduced, the splicing welding seams are reduced, and meanwhile, the reduction of the safety risk probability with many leakage points can be reduced.

Further, the interlayer space between the inner cap 111 and the outer cap 121 is reduced, the vacuum insulation material provided in the interlayer is also reduced, and the manufacturing cost is reduced.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A fuel tank, characterized by comprising:

an inner tank;

the outer tank is sleeved on the outer side of the inner tank;

the cold box is arranged on the outer side of the outer tank; and

2. The fuel tank of claim 1, wherein the piping system further comprises a connection joint provided on the inner tank for communicating the inner overflow pipe and the outer overflow pipe.

3. The fuel tank as recited in claim 1, wherein the overflow pipe is a double-walled pipe.

4. The fuel tank of claim 1, wherein the end of the overflow pipe located inside the cold box is provided with a plurality of outflow branches having different heights, and the outflow branches are provided with temperature transmitters.

5. The fuel tank of claim 4 wherein the piping system further comprises a controller, the temperature transmitter being in electrical signal connection with the controller.

6. The fuel tank of claim 1, wherein the plurality of inlet structures are located at different heights of the inner tank.

7. The fuel tank of claim 6 wherein the inlet structure comprises a first inlet structure corresponding to 85-90% of the height of the inner tank volume and a second inlet structure corresponding to 90-95% of the height of the inner tank volume.

8. The fuel tank according to claim 1, wherein an interlayer is present between the inner tank and the outer tank, and a vacuum insulation layer is provided in the interlayer.

9. The fuel tank of claim 1, wherein the inner tank comprises an inner head and an inner cylinder, and the inner overflow pipe is arranged on the inner head in a penetrating manner.

10. The fuel tank of claim 1, wherein the outer tank comprises an outer head and an outer cylinder, and the overflow pipe is arranged on the outer head.