CN207065081U

CN207065081U - A kind of tank overflow pipe return-flow structure peculiar to vessel

Info

Publication number: CN207065081U
Application number: CN201720853986.6U
Authority: CN
Inventors: 孙国洪; 乔广明; 顾刘海
Original assignee: Zhangjiagang Furui Cryogenic Technology Co Ltd
Current assignee: Zhangjiagang Furui Cryogenic Technology Co Ltd
Priority date: 2017-07-14
Filing date: 2017-07-14
Publication date: 2018-03-02
Anticipated expiration: 2027-07-14

Abstract

A kind of tank overflow pipe return-flow structure peculiar to vessel is the utility model is related to, mainly solve in the prior art in the presence of when being filled to LNG fuel tank equipment inner bag peculiar to vessel, LNG media in overflow pipe overflow relatively slow, cause temperature transmitter presignal delay so that actual filling rate has the problem of certain error with the filling rate measured.The utility model is by using a kind of tank overflow pipe return-flow structure peculiar to vessel, including inner bag, outer courage and the tank room being connected with outer courage, more set detecting devices are provided between the inner bag, the outer courage and the tank room, the technical scheme of drainage tube is provided with described in every group between detection means and the inner bag, preferably solve the problem, alarm is filled available for cryogenic media.

Description

A kind of tank overflow pipe return-flow structure peculiar to vessel

Technical field

It the utility model is related to a kind of tank overflow pipe return-flow structure peculiar to vessel.

Background technology

LNG fuel tank equipment peculiar to vessel is horizontal double shells container, and tank body primary structure is by inner bag, shell, pipeline (interlayer pipe Pipeline control system in road and tank room), support, saddle, the composition such as tank room.

Inner bag storage temperature is about -162 ° of LNG, and (interlayer) is protected using heat-insulating material between inner bag and shell Temperature, 2 to 3 overflow pipes are provided with the mezzanine space of rear portion, and (different filling rates, the acting as of overflow pipe work as LNG media After being filled into the filling rate of setting, medium will overflow from overflow pipe, so as to detect the filling rate of setting), it is above-mentioned to overflow Flow tube, out by interlayer to shell, is eventually introduced in tank room that (tank room be confined space, and the inside is that pipeline control is from inner bag System).

Required according to classification society, there must not be medium directly to overflow in tank room, (Conventional cryogenic ship tank reaches setting and fills liquid level All directly overflowed from overflow pipe afterwards), so overflow tube end is directly connected by we with temperature transmitter, so as to pass through it Monitoring fills the liquid level of liquid to show.It can so also eliminate LNG media while code requirement is met and overflow into tank room The danger of (confined space), provides security performance significantly.

Traditional overflow tube end directly with temperature transmitter structure be mainly designed to combine long-term Experience Design, though The right design also meets functional requirement, but overflow tube end is closing with temperature transmitter junction, and just says and work as If pressure is inadequate in inner bag, when end spaces are closed, the LNG media in inner bag need to overcome resistance outwards to overflow, and measure reality Certain delay be present in filling rate.

In following the trail of the technical problem of conventional similar structures project, it has been found that general LNG fueling stations fire to LNG peculiar to vessel When batch can equipment inner bag fills, general charge pressure is 3-5bar, when being filled at overflow pipe, because pressure inside the tank is relatively low, and Overflow pipe from inner bag come out when in the presence of certain fluid-tight structure, when overflow tube end and temperature transmitter junction are confined space When, the LNG media in inner bag overflow relatively slow.For example, when being filled into 95% liquid level, the temperature transmitter of end 95% is simultaneously Not and alarm, just start to alarm after about 2-3 minutes, due to the delay so that actual filling rate has one with the filling rate surveyed Determine error.

When using traditional overflow tube end directly with temperature transmitter structure, actual filling rate be present and filled with what is surveyed The error of rate, it is often more important that, it is understood that there may be (equipment inner bag gas-phase space is inadequate, and safety valve comes not for the risk of LNG overfillings And discharge).So this structure is unreasonable, it is necessary to improve.

Utility model content

Technical problem to be solved in the utility model is to exist to fill LNG fuel tank equipment inner bag peculiar to vessel in the prior art During dress, the LNG media spilling in overflow pipe is relatively slow, causes temperature transmitter presignal delay so that actual filling rate is with surveying There is the problem of certain error in the filling rate obtained, it is proposed that a kind of tank overflow pipe return-flow structure peculiar to vessel, the mounting structure have LNG Medium can quickly overflow, temperature transmitter alarm no longer delay, actual filling rate and the free from error feature of filling rate measured.

It is as follows to solve above-mentioned technical problem the technical solution adopted in the utility model：A kind of tank overflow pipe backflow knot peculiar to vessel Structure, including inner bag, outer courage and the tank room being connected with outer courage, it is provided between the inner bag, the outer courage and the tank room more Set detecting device, drainage tube is all provided with described in every group between detection means and the inner bag.

Preferably, the detection means include overflow pipe between the inner bag, the outer courage and the tank room, The temperature transmitter being connected with the overflow pipe is provided with the tank room.

Preferably, described drainage tube one end is connected by three-way connection with overflow pipe, the other end with it is interior in the inner bag Cylinder or blow-down pipe connection.

Preferably, the drainage tube is provided with control valve.

Preferably, the detection means is at least provided with 2 groups.

In the utility model, drainage tube is connected on inner bag inner barrel or on blow-down pipe (gas-phase space) so that end is not It is enclosed construction again, ensures that, when being charged to actual filling rate, LNG can quickly overflow when inner bag fills LNG media, temperature becomes Send device alarm no longer to postpone, ensure that actual filling rate and the filling rate surveyed are error free；

In the utility model, by setting control valve on drainage tube, after temperature transmitter measures LNG media, control Valve processed is closed immediately, is closed rearward end and is formed confined space, avoid LNG media in overflow pipe and largely assemble, the temperature made becomes Device is sent persistently to alarm.

Brief description of the drawings

Fig. 1 is a kind of structural representation of tank overflow pipe return-flow structure peculiar to vessel of the utility model.

In accompanying drawing：

1st, inner bag 2, outer courage 3, tank room

4th, drainage tube 41, control valve 5, overflow pipe

6th, temperature transmitter

Embodiment

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, with reference to embodiments, to this Utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this practicality It is new, it is not used to limit the utility model.

【Embodiment 1】

A kind of tank overflow pipe return-flow structure peculiar to vessel, including inner bag 1, outer courage 2 and the tank room 3 being connected with outer courage 2, tank room 3 Interior is confined space, and more set detecting devices are provided between the inner bag 1, the outer courage 2 and the tank room 3, inspection described in every group Survey between device and the inner bag 1 and be all provided with drainage tube 4,.

The detection means includes the overflow pipe 5 between the inner bag 1, the outer courage 2 and the tank room 3, position It is interior provided with the temperature transmitter 6 being connected with the overflow pipe 5 in the tank room 3.

Described one end of drainage tube 4 is connected by three-way connection with overflow pipe 5, and junction is located in tank room 3, the other end and institute The inner barrel in inner bag 1 or blow-down pipe (being to draw on figure) connection are stated, by the way that drainage tube 4 is connected into inner barrel or blow-down pipe The end of overflow pipe 5 is being not confined space, and LNG media can be quickly spilled at temperature transmitter 6, make temperature transmitter 6 quick Alarm.

In order that after temperature transmitter 6 measures LNG so that the end of overflow pipe 5 forms confined space, so as in the drainage Pipe 4 is provided with control valve 41, and control valve 41 is closed in time, avoids the LNG medium bulk depositions in overflow pipe 5.

The detection means is at least provided with 2 groups, it is preferred to use 2 groups.

In addition to the implementation, the utility model can also have other embodiment.It is all to use equivalent substitution or equivalent change The technical scheme to be formed is changed, all falls within the protection domain of the requires of the utility model.

Claims

1. a kind of tank overflow pipe return-flow structure peculiar to vessel, including inner bag (1), outer courage (2) and the tank room (3) being connected with outer courage (2), Characterized in that, it is provided with more set detecting devices, every group of institute between the inner bag (1), the outer courage (2) and the tank room (3) State and drainage tube (4) is all provided between detection means and the inner bag (1).

2. a kind of tank overflow pipe return-flow structure peculiar to vessel according to claim 1, it is characterised in that the detection means includes Overflow pipe (5) between the inner bag (1), the outer courage (2) and the tank room (3), set in the tank room (3) There is the temperature transmitter (6) being connected with the overflow pipe (5).

A kind of 3. tank overflow pipe return-flow structure peculiar to vessel according to claim 1, it is characterised in that the drainage tube (4) one End is connected by three-way connection with overflow pipe (5), and the other end is connected with the inner barrel in the inner bag (1) or blow-down pipe.

4. a kind of tank overflow pipe return-flow structure peculiar to vessel according to claim 1, it is characterised in that on the drainage tube (4) Provided with control valve (41).

5. a kind of tank overflow pipe return-flow structure peculiar to vessel according to claim 1, it is characterised in that the detection means is at least Provided with 2 groups.