CN110985877A

CN110985877A - Overflow pipeline of tank container for freezing liquefied gas

Info

Publication number: CN110985877A
Application number: CN201911376512.7A
Authority: CN
Inventors: 郭怀远; 贺军; 王伟; 朱英波; 李照明
Original assignee: CRRC Xian Co Ltd
Current assignee: CRRC Xian Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-10

Abstract

The invention discloses an overflow pipeline of a tank container for refrigerated liquefied gas.A first internal overflow pipe is communicated with a first interlayer overflow pipe in a sealing manner, the first interlayer overflow pipe is communicated with a first external overflow pipe in a sealing manner, and a first stop valve is arranged between the first external overflow pipe and a second external overflow pipe; the second inner overflow pipe is communicated with a second interlayer overflow pipe in a sealing manner, the second interlayer overflow pipe is communicated with a third outer overflow pipe in a sealing manner, and a second stop valve is arranged between the third outer overflow pipe and a fourth outer overflow pipe; the second external overflow pipe, the fourth external overflow pipe, the fifth external overflow pipe and the sixth external overflow pipe are communicated through four-way socket welding pipe fittings, and the fifth external overflow pipe, the sixth external overflow pipe and the seventh external overflow pipe are communicated through three-way socket welding pipe fittings; a seventh external overflow is connected to the purge. The invention is suitable for various working conditions, and the gas state and the liquid state of the medium are separated in the overflow process.

Description

Overflow pipeline of tank container for freezing liquefied gas

Technical Field

The invention belongs to the technical field of logistics transportation, and particularly relates to an overflow pipeline of a refrigerated liquefied gas tank container.

Background

A tank container for frozen liquefied gas (hereinafter referred to as a tank) is widely used in the logistics industry and the industrial gas industry as equipment for transporting frozen liquefied gas. The tank box comprises a tank body which is usually a cylindrical barrel, and sealing heads are arranged at two ends of the barrel. Typically, an overflow line is provided on the tank to indicate that the level of the medium in the tank has reached a certain position in the tank. An overflow pipeline is usually arranged on the existing tank box, an inlet end is arranged in an inner tank body of the tank box, an outlet end is arranged outside an outer tank body, and a stop valve is arranged at the tail end of the pipeline. The height of the position of the pipe orifice at the inlet end is the height of the position corresponding to the indication line of the initial filling rate of the tank (the initial filling rate is calculated according to the characteristics of the medium, the geometric parameters of the tank and the maximum maintenance time of the assumed nondestructive storage time of the medium in the tank). The disadvantages of this type of structure are as follows:

the first disadvantage is that: for many tanks with short transport periods and controllable transport processes, the non-destructive storage time required for the transport process is much less than its maximum holding time (i.e. the tank pressure reaches the safety valve set pressure and the filling rate reaches the maximum filling rate specified in the relevant standards). In such cases, if the density of the carrying medium is relatively low and the loading quality of the medium is still controlled according to the initial filling rate of the tank, when the tank arrives at the liquid unloading station, the pressure in the tank is much lower than the safety valve setting pressure, the carrying capacity of the tank is not utilized to the maximum, and the transportation cost of the goods per unit weight is high.

The second disadvantage is that: in the liquid filling process, when the liquid level of the medium in the tank is close to the height corresponding to the initial filling rate indicating line of the tank, the stop valve is opened; when the overflow pipeline outside the tank has obvious frosting phenomenon, the liquid level height of the medium is indicated to reach the height corresponding to the initial filling rate indicating line of the tank, and the liquid filling is stopped continuously. The existing overflow pipeline structure does not separately display the gaseous overflow and the liquid overflow of the medium after the stop valve, and the possibility of misjudgment exists because the gaseous medium or the liquid medium leads to the frosting phenomenon difficultly when the pipeline frosts.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an overflow pipeline of a refrigerated liquefied gas tank container, which is an overflow pipeline structure suitable for various working conditions and capable of separating gas and liquid in an overflow process.

In order to solve the technical problems, the invention adopts the following technical scheme:

an overflow line for a refrigerated liquefied gas tank container, comprising:

a first internal overflow pipe and a second internal overflow pipe for mounting within an inner tank body of the tank;

the first interlayer overflow pipe and the second interlayer overflow pipe are used for being arranged in a vacuum interlayer between an inner tank body and an outer shell of the tank box;

a first external overflow pipe, a second external overflow pipe, a third external overflow pipe, a fourth external overflow pipe, a fifth external overflow pipe, a sixth external overflow pipe and a seventh external overflow pipe for being installed outside the shell of the tank;

the first inner overflow pipe is communicated with a first interlayer overflow pipe in a sealing mode through a first pipe joint edge, the first interlayer overflow pipe is communicated with a first outer overflow pipe in a sealing mode through a third pipe joint edge, and a first stop valve is arranged between the first outer overflow pipe and the second outer overflow pipe; the second inner overflow pipe is communicated with a second interlayer overflow pipe in a sealing way through a second pipe joint edge, the second interlayer overflow pipe is communicated with a third outer overflow pipe in a sealing way through a fourth pipe joint edge, and a second stop valve is arranged between the third outer overflow pipe and the fourth outer overflow pipe; the second external overflow pipe, the fourth external overflow pipe, the fifth external overflow pipe and the sixth external overflow pipe are communicated through four-way socket welding pipe fittings, and the fifth external overflow pipe, the sixth external overflow pipe and the seventh external overflow pipe are communicated through three-way socket welding pipe fittings; a seventh external overflow is connected to the purge.

The invention also comprises the following technical characteristics:

specifically, the tank box comprises the inner tank body and the outer shell sleeved outside the inner tank body, and the end part of the inner tank body is an end socket of the inner tank body; at the upper part of the inner tank body, three horizontal lines are marked from top to bottom in sequence: a maximum filling rate indicating line A, a rated filling rate indicating line B and an initial filling rate indicating line C;

the position of the pipe orifice of the first internal overflow pipe corresponds to an initial filling rate indicating line C, and the position of the pipe orifice of the second internal overflow pipe corresponds to a rated filling rate indicating line B;

the first stop valve, the second stop valve, the four-way socket welding pipe fitting, the three-way socket welding pipe fitting, the seventh external overflow pipe and the diffusing pipe are all located below the initial filling rate indicating line C.

Specifically, two ends of the first pipe joint edge are respectively in socket welding with the first internal overflow pipe and the first interlayer overflow pipe, and the first pipe joint edge penetrates through and is welded on the inner tank body sealing head;

and two ends of the third pipe joint edge are respectively in socket welding with the first interlayer overflow pipe and the first external overflow pipe, and the third pipe joint edge penetrates through and is welded on the shell.

Specifically, two ends of the second pipe joint edge are respectively connected with the second internal overflow pipe and the second interlayer overflow pipe, and the second pipe joint edge penetrates through and is welded on the inner tank body sealing head;

and two ends of the fourth pipe joint edge are respectively communicated with the second interlayer overflow pipe and the third external overflow pipe, and the fourth pipe joint edge penetrates through and is welded on the shell.

Specifically, one end of a first external overflow pipe is in butt welding with one end of a first stop valve, and one end of a second external overflow pipe is in sleeve type connection with the other end of the first stop valve;

one end of a third external overflow pipe is in butt welding with one end of a second stop valve, and one end of a fourth external overflow pipe is in sleeve type connection with the other end of the second stop valve.

Specifically, the other end of the second external overflow pipe, the other end of the fourth external overflow pipe, one end of the fifth external overflow pipe and one end of the sixth external overflow pipe are socket welded with the four-way socket welded pipe fitting;

the other end of the fifth external overflow pipe, the other end of the sixth external overflow pipe and one end of the seventh external overflow pipe are all socket welded with the three-way socket welded pipe fitting.

Specifically, the other end of the seventh external overflow pipe is connected with a ferrule type pipe joint, and the ferrule type pipe joint and the diffusion pipe are hermetically communicated through a fifth pipe joint edge; the cutting sleeve type pipe joint is in threaded connection with the fifth pipe joint edge, and the fifth pipe joint edge is welded with the diffusing pipe.

Compared with the prior art, the invention has the following technical effects:

if the transportation period of the tank is longer, an overflow pipeline corresponding to the position of the pipe orifice at the initial filling rate indicating line can be selected; conversely, the overflow line corresponding to the position of the nozzle at the nominal fill rate indicator line can be selected. According to the different of tank transportation operating mode, select the corresponding overflow pipeline of corresponding full rate indicator position department, exert tank carrying capacity to the biggest, reduce the cost of transportation of goods unit weight. In addition, the overflow pipeline structure behind the stop valve can timely and effectively show the pipeline frosting phenomenon when the liquid medium flows through the pipeline, and is convenient for accurately judging whether the liquid level of the medium in the tank reaches the corresponding height.

The tank is provided with a double-overflow pipeline structure, namely, pipeline structures with different filling rates corresponding to different overflow pipelines; the pipeline structure for the gaseous medium and the liquid medium at the tail end of the overflow pipeline, namely the pipeline structure for the gaseous medium and the liquid medium to flow through in the overflow process.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is an enlarged view of a portion of FIG. 1 according to the present invention.

The meaning of the individual reference symbols in the figures is: 1-a first internal overflow pipe, 2-a second internal overflow pipe, 3-a first interlayer overflow pipe, 4-a second interlayer overflow pipe, 5-a first external overflow pipe, 6-a second external overflow pipe, 7-a third external overflow pipe, 8-a fourth external overflow pipe, 9-a fifth external overflow pipe, 10-a sixth external overflow pipe, 11-a seventh external overflow pipe;

100-inner tank body, 101-inner tank body end enclosure;

201-first pipe joint edge, 202-second pipe joint edge, 203-third pipe joint edge, 204-fourth pipe joint edge, 205-fifth pipe joint edge;

301-a first shut-off valve, 302-a second shut-off valve,

401-four-way socket welding pipe fittings, 402-three-way socket welding pipe fittings,

501-a diffusing pipe; 601-a pipe joint;

a-maximum fill rate indicator, B-nominal fill rate indicator, and C-initial fill rate indicator.

Detailed Description

The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.

Example 1:

following the above technical solution, as shown in fig. 1 to 2, the present embodiment provides an overflow line for a refrigerated liquefied gas tank container, including:

a first internal overflow pipe 1 and a second internal overflow pipe 2 for installation in the inner tank 100 of the tank; a first interlayer overflow pipe 3 and a second interlayer overflow pipe 4 for installation in a vacuum interlayer between the inner tank 100 and the outer shell of the tank; a first external overflow pipe 5, a second external overflow pipe 6, a third external overflow pipe 7, a fourth external overflow pipe 8, a fifth external overflow pipe 9, a sixth external overflow pipe 10 and a seventh external overflow pipe 11 for mounting outside the housing of the tank.

The first internal overflow pipe 1 is in sealed communication with a first interlayer overflow pipe 3 through a first pipe joint edge 201, the first interlayer overflow pipe 3 is in sealed communication with a first external overflow pipe 5 through a third pipe joint edge 203, and a first stop valve 301 is arranged between the first external overflow pipe 5 and a second external overflow pipe 6; the second internal overflow pipe 2 is in sealed communication with a second interlayer overflow pipe 4 through a second pipe joint edge 202, the second interlayer overflow pipe 4 is in sealed communication with a third external overflow pipe 7 through a fourth pipe joint edge 204, and a second stop valve 302 is arranged between the third external overflow pipe 7 and a fourth external overflow pipe 8; the second external overflow pipe 6, the fourth external overflow pipe 8, the fifth external overflow pipe 9 and the sixth external overflow pipe 10 are communicated through a four-way socket welding pipe 401, and the fifth external overflow pipe 9, the sixth external overflow pipe 10 and the seventh external overflow pipe 11 are communicated through a three-way socket welding pipe 402; a seventh external overflow pipe 11 is connected to the blow-off pipe 501.

The tank box comprises an inner tank body 100 and a shell sleeved outside the inner tank body 100, wherein the end part of the inner tank body 100 is provided with an inner tank body seal head 101; three horizontal lines are marked on the upper part of the inner tank body 100 from top to bottom in sequence: a maximum filling rate indicating line A, a rated filling rate indicating line B and an initial filling rate indicating line C; the position of the mouth of the first internal overflow pipe 1 corresponds to the initial fill rate indicator line C and the position of the mouth of the second internal overflow pipe 2 corresponds to the nominal fill rate indicator line B. In the embodiment, more specifically, the first internal overflow pipe 1 and the second internal overflow pipe 2 are vertically arranged near the pipe orifice, and then are bent by 90 degrees to extend to the position near the inner tank body end enclosure 101 in the horizontal direction, so that the first internal overflow pipe and the second internal overflow pipe can be conveniently and respectively communicated with the first pipe joint edge 201 and the second pipe joint edge 202 through a bending structure; first intermediate layer overflow pipe 3 and second intermediate layer overflow pipe 4 are bending structure near first flange 201 and second flange 202, conveniently with first flange 201 and second flange 202 intercommunication to first intermediate layer overflow pipe 3 and second intermediate layer overflow pipe 4 after bending extend downwards in vacuum interlayer to near third flange 203 and fourth flange 204 and communicate with third flange 203 and fourth flange 204 respectively through bending structure. The first stop valve 301, the second stop valve 302, the four-way socket welded pipe 401, the three-way socket welded pipe 402, the seventh external overflow pipe 11 and the blow-off pipe 501 are all located below the initial fill rate indicator line C to achieve overflow control.

Two ends of a first pipe joint edge 201 are respectively in socket welding with the first internal overflow pipe 1 and the first interlayer overflow pipe 3, and the first pipe joint edge 201 penetrates through and is welded on the inner tank body end enclosure 101; two ends of the second pipe joint edge 202 are respectively socket-welded with the second internal overflow pipe 2 and the second interlayer overflow pipe 4, and the second pipe joint edge 202 penetrates through and is welded on the inner tank body seal head 101.

The two ends of the third pipe joint edge 203 are respectively connected with the first interlayer overflow pipe 3 and the first external overflow pipe 5, and the third pipe joint edge 203 penetrates through and is welded on the shell; the two ends of the fourth pipe joint edge 204 are respectively connected with the second interlayer overflow pipe 4 and the third external overflow pipe 7, and the fourth pipe joint edge 204 penetrates through and is welded on the shell.

One end of the first external overflow pipe 5 is in butt welding with one end of the first stop valve 301, and one end of the second external overflow pipe 6 is in sleeve type connection with the other end of the first stop valve 301; one end of the third external overflow pipe 7 is in butt welding with one end of the second stop valve 302, and one end of the fourth external overflow pipe 8 is in ferrule type connection with the other end of the second stop valve 302.

The other end of the second external overflow pipe 6, the other end of the fourth external overflow pipe 8, one end of the fifth external overflow pipe 9 and one end of the sixth external overflow pipe 10 are socket welded with a four-way socket welding pipe 401; the other end of the fifth external overflow tube 9, the other end of the sixth external overflow tube 10 and one end of the seventh external overflow tube 11 are socket welded to a three-way socket welded fitting 402.

The other end of the seventh external overflow pipe 11 is connected with a ferrule type pipe joint 601, and the ferrule type pipe joint 601 is in sealed communication with the diffusing pipe 501 through a fifth pipe joint edge 205; the ferrule type pipe joint 601 is connected with the fifth pipe joint edge 205 in a threaded manner, and the fifth pipe joint edge 205 is welded with the diffusing pipe 501.

In fig. 1, a is a maximum fill rate indicator, B is a nominal fill rate indicator, and C is an initial fill rate indicator; the lower ports of the first and second internal overflow tubes 1, 2 are located at positions corresponding to the initial and nominal fill rate indicator lines, respectively. The overflow pipelines corresponding to the internal initial full-filling rate and the rated full-filling rate, the overflow pipelines corresponding to the interlayer initial full-filling rate and the rated full-filling rate, the overflow pipelines corresponding to the external initial full-filling rate and the rated full-filling rate, the overflow pipelines outside the tank, and the overflow medium gas-phase and liquid-phase separation structures in the overflow pipelines are arranged on the tank, so that the accurate prompt of the medium liquid level height in the tank under different working conditions is realized.

The tank double-overflow pipeline structure in the embodiment can realize pipeline structures corresponding to different overflow pipelines with different filling rates; therefore, the overflow pipeline corresponding to the corresponding filling rate can be selected according to the different transportation working conditions of the tank, the carrying capacity of the tank is exerted to the maximum, and the transportation cost of the unit weight of the goods is reduced. Specifically, when long-distance transportation is to be realized, for example, when long-distance transportation is carried out for about 3 months, the first internal overflow pipe 1 and the first interlayer overflow pipe 3, the first external overflow pipe 5, the first stop valve 301 and the second external overflow pipe 6 which are communicated with the first internal overflow pipe are selected to work, and an overflow pipeline structure behind the first stop valve 301 shows the pipeline frosting phenomenon when liquid medium flows through the pipeline timely and effectively, so that whether the liquid level of the medium in the tank reaches the corresponding height or not is conveniently and accurately judged. When will realize closely the short distance and carry, select second inside overflow pipe 2 and the second intermediate layer overflow pipe 4, the outside overflow pipe 7 of third, second stop valve 302 and the work of fourth outside overflow pipe 8 of intercommunication, the overflow pipeline structure behind second stop valve 302, pipeline frosting phenomenon when passing through the pipeline with liquid medium is in time, effectual manifestation, whether the liquid level of the accurate judgement tank incasement medium of being convenient for reachs corresponding height.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. The utility model provides a refrigerated liquefied gas tank container overflow line which characterized in that includes:

a first internal overflow pipe (1) and a second internal overflow pipe (2) for installation in an inner tank (100) of a tank;

a first interlayer overflow pipe (3) and a second interlayer overflow pipe (4) which are used for being arranged in a vacuum interlayer between an inner tank body (100) and an outer shell of the tank box;

a first external overflow pipe (5), a second external overflow pipe (6), a third external overflow pipe (7), a fourth external overflow pipe (8), a fifth external overflow pipe (9), a sixth external overflow pipe (10) and a seventh external overflow pipe (11) for mounting outside the housing of the tank;

the first internal overflow pipe (1) is communicated with a first interlayer overflow pipe (3) in a sealing mode through a first pipe joint edge (201), the first interlayer overflow pipe (3) is communicated with a first external overflow pipe (5) in a sealing mode through a third pipe joint edge (203), and a first stop valve (301) is arranged between the first external overflow pipe (5) and a second external overflow pipe (6); the second internal overflow pipe (2) is communicated with a second interlayer overflow pipe (4) in a sealing way through a second pipe joint edge (202), the second interlayer overflow pipe (4) is communicated with a third external overflow pipe (7) in a sealing way through a fourth pipe joint edge (204), and a second stop valve (302) is arranged between the third external overflow pipe (7) and a fourth external overflow pipe (8); the second external overflow pipe (6), the fourth external overflow pipe (8), the fifth external overflow pipe (9) and the sixth external overflow pipe (10) are communicated through a four-way socket welding pipe fitting (401), and the fifth external overflow pipe (9), the sixth external overflow pipe (10) and the seventh external overflow pipe (11) are communicated through a three-way socket welding pipe fitting (402); a seventh external overflow pipe (11) is connected to the blow-off pipe (501).

2. The tank overflow line for refrigerated liquefied gas containers as claimed in claim 1 wherein the tank comprises the inner tank (100) and the outer shell sleeved outside the inner tank (100), the inner tank (100) is terminated with an inner tank closure (101);

three horizontal lines are marked on the upper part of the inner tank body (100) from top to bottom in sequence: a maximum filling rate indicating line A, a rated filling rate indicating line B and an initial filling rate indicating line C;

the position of the pipe orifice of the first internal overflow pipe (1) corresponds to an initial filling rate indicating line C, and the position of the pipe orifice of the second internal overflow pipe (2) corresponds to a rated filling rate indicating line B;

the first stop valve (301), the second stop valve (302), the four-way socket welding pipe fitting (401), the three-way socket welding pipe fitting (402), the seventh external overflow pipe (11) and the diffusing pipe (501) are all located below the initial filling rate indicating line C.

3. The overflow piping for a tank container for refrigerated liquefied gas according to claim 2, wherein both ends of the first pipe joint rim (201) are socket welded with the first internal overflow pipe (1) and the first interlayer overflow pipe (3), respectively, and the first pipe joint rim (201) penetrates and is welded on the inner tank body end closure (101);

and two ends of the third pipe joint edge (203) are respectively in socket welding with the first interlayer overflow pipe (3) and the first external overflow pipe (5), and the third pipe joint edge (203) penetrates through and is welded on the shell.

4. The overflow pipe of a tank for refrigerated liquefied gas container as claimed in claim 2, wherein both ends of the second pipe joint rim (202) are socket welded with the second internal overflow pipe (2) and the second interlayer overflow pipe (4), respectively, and the second pipe joint rim (202) penetrates and is welded on the inner tank body end enclosure (101);

and two ends of the fourth pipe joint edge (204) are respectively communicated with the second interlayer overflow pipe (4) and the third external overflow pipe (7), and the fourth pipe joint edge (204) penetrates through and is welded on the shell.

5. The overflow piping of a tank container for refrigerated liquefied gas according to claim 2, wherein one end of the first external overflow pipe (5) is butt-welded to one end of the first cut-off valve (301), and one end of the second external overflow pipe (6) is bite-connected to the other end of the first cut-off valve (301);

one end of a third external overflow pipe (7) is in butt welding with one end of a second stop valve (302), and one end of a fourth external overflow pipe (8) is in sleeve type connection with the other end of the second stop valve (302).

6. The overflow piping of a tank container for refrigerated liquefied gas according to claim 5, wherein the other end of the second external overflow pipe (6), the other end of the fourth external overflow pipe (8), one end of the fifth external overflow pipe (9) and one end of the sixth external overflow pipe (10) are socket welded with a four-way socket welded pipe (401);

the other end of the fifth external overflow pipe (9), the other end of the sixth external overflow pipe (10) and one end of the seventh external overflow pipe (11) are in socket welding with a three-way socket welding pipe fitting (402).

7. The overflow line of a liquefied gas refrigerated tank container according to claim 6, wherein the other end of the seventh external overflow pipe (11) is connected with a ferrule type pipe joint (601), and the ferrule type pipe joint (601) and the diffuser pipe (501) are in sealed communication through a fifth pipe joint edge (205); the ferrule type pipe joint (601) is in threaded connection with the fifth pipe joint edge (205), and the fifth pipe joint edge (205) is welded with the diffusing pipe (501).