Overflow pipeline of a refrigerated liquefied gas tank container

Abstract

The invention discloses an overflow pipeline of a refrigerated liquefied gas tank container, wherein a first internal overflow pipe is sealed and connected to a first interlayer overflow pipe, the first interlayer overflow pipe is sealed and connected to a first external overflow pipe, a first stop valve is arranged between the first external overflow pipe and the second external overflow pipe; a second internal overflow pipe is sealed and connected to a second interlayer overflow pipe, the second interlayer overflow pipe is sealed and connected to a third external overflow pipe, a second stop valve is arranged between the third external overflow pipe and the fourth external overflow pipe; the second external overflow pipe, the fourth external overflow pipe, the fifth external overflow pipe and the sixth external overflow pipe are connected through a four-way socket welding pipe fitting, the fifth external overflow pipe, the sixth external overflow pipe and the seventh external overflow pipe are connected through a three-way socket welding pipe fitting; the seventh external overflow pipe is connected to a vent pipe. The invention is applicable to a variety of working conditions, and the medium is separated into gaseous and liquid states during the overflow process.

Description

Technical Field

[0001] The invention belongs to the technical field of logistics and transportation, and in particular relates to an overflow pipeline of a refrigerated liquefied gas tank container. Background Art

[0002] Refrigerated liquefied gas tank containers (hereinafter referred to as tank containers) are widely used in the logistics industry and industrial gas industry as refrigerated liquefied gas transportation equipment. The tank container includes a tank body, which is usually a cylindrical cylinder with heads at both ends of the cylinder. Usually, an overflow pipeline is provided on the tank container to indicate that the liquid level of the medium in the tank container has reached a certain position in the tank body. Existing tank containers are usually provided with an overflow pipeline, the inlet end of which is in the inner tank body of the tank container, the outlet end is outside the outer tank body, and a stop valve is provided at the end of the pipeline. The height of the pipe mouth position at the inlet end is the height of the position corresponding to the indicator line of the initial filling rate of the tank container (the initial filling rate is calculated based on the medium characteristics, the geometric parameters of the tank container and the assumption that the lossless storage time of the medium in the tank container reaches the longest maintenance time). The disadvantages of this type of structure are as follows:

[0003] Disadvantage 1: For many tank containers with short transportation cycles and controllable transportation processes, the lossless storage time required for the transportation process is much shorter than its maximum maintenance time (i.e., the pressure in the tank reaches the set pressure of the safety valve and the filling rate reaches the maximum filling rate specified in the relevant standards). In such cases, if the density of the carrier medium is relatively small and the loading mass of the medium is still controlled according to the initial filling rate of the tank container, when the tank container arrives at the unloading site, the pressure in the tank container is much lower than the set pressure of its safety valve, the carrying capacity of the tank container is not fully utilized, and the transportation cost per unit weight of goods is high.

[0004] Disadvantage 2: During the filling process, when the liquid level of the medium in the tank container is close to the height corresponding to the initial filling rate indicator line of the tank container, the stop valve is opened; when obvious frost appears on the overflow pipeline outside the tank container, it indicates that the liquid level of the medium has reached the height corresponding to the initial filling rate indicator line of the tank container, and the filling should be stopped. The existing overflow pipeline structure does not display the gas overflow and liquid overflow of the medium separately after the stop valve. When the pipeline frosts, it is difficult to distinguish whether it is caused by gaseous medium or liquid medium, and there is a possibility of misjudgment. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide an overflow pipeline for a refrigerated liquefied gas tank container, which is an overflow pipeline structure suitable for various working conditions and in which the gaseous and liquid states of the medium are separated during the overflow process.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0007] A refrigerated liquefied gas tank container overflow pipeline, comprising:

[0008] A first internal overflow pipe and a second internal overflow pipe are used to be installed in the inner tank body of the tank container;

[0009] The first interlayer overflow pipe and the second interlayer overflow pipe are used to be installed in the vacuum interlayer between the inner tank body and the outer shell of the tank container;

[0010] 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, which are installed outside the outer shell of the tank container;

[0011] Among them, the first internal overflow pipe is connected to the first interlayer overflow pipe through the first pipe edge seal, the first interlayer overflow pipe is connected to the first external overflow pipe through the third pipe edge seal, and a first stop valve is arranged between the first external overflow pipe and the second external overflow pipe; the second internal overflow pipe is connected to the second interlayer overflow pipe through the second pipe edge seal, the second interlayer overflow pipe is connected to the third external overflow pipe through the fourth pipe edge seal, and a second stop valve is arranged between the third external overflow pipe and the fourth external overflow pipe; the second external overflow pipe, the fourth external overflow pipe, the fifth external overflow pipe and the sixth external overflow pipe are connected through a four-way socket welding pipe fitting, and the fifth external overflow pipe, the sixth external overflow pipe and the seventh external overflow pipe are connected through a three-way socket welding pipe fitting; the seventh external overflow pipe is connected to the vent pipe.

[0012] The present invention also includes the following technical features:

[0013] Specifically, the tank container comprises the inner tank body and the outer shell which is sleeved outside the inner tank body, and the end of the inner tank body is the inner tank body head; on the upper part of the inner tank body, three horizontal lines are marked in sequence from top to bottom: a maximum filling rate indication line A, a rated filling rate indication line B and an initial filling rate indication line C;

[0014] The position of the first internal overflow pipe corresponds to the initial filling rate indicator line C, and the position of the second internal overflow pipe corresponds to the rated filling rate indicator line B;

[0015] 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 vent pipe are all located below the initial filling rate indicator line C.

[0016] Specifically, the two ends of the first pipe joint edge are respectively socket-welded to the first internal overflow pipe and the first interlayer overflow pipe, and the first pipe joint edge penetrates and is welded to the inner tank body head;

[0017] The two ends of the third pipe connection edge are respectively socket-welded with the first interlayer overflow pipe and the first external overflow pipe, and the third pipe connection edge penetrates through and is welded to the outer shell.

[0018] Specifically, the two ends of the second pipe connection edge are respectively connected to the second internal overflow pipe and the second interlayer overflow pipe, and the second pipe connection edge penetrates and is welded to the inner tank body head;

[0019] The two ends of the fourth pipe connection edge are respectively connected to the second interlayer overflow pipe and the third external overflow pipe, and the fourth pipe connection edge penetrates and is welded to the outer shell.

[0020] Specifically, one end of the first external overflow pipe is butt-welded to one end of the first stop valve, and one end of the second external overflow pipe is connected to the other end of the first stop valve in a sleeve-type manner;

[0021] One end of the third external overflow pipe is butt-welded to one end of the second stop valve, and one end of the fourth external overflow pipe is connected to the other end of the second stop valve in a sleeve-type manner.

[0022] 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 all socket-welded to the four-way socket-welded pipe fitting;

[0023] 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 to the three-way socket-welded pipe fitting.

[0024] 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 relief pipe are sealed and connected through the fifth pipe joint edge; the ferrule-type pipe joint and the fifth pipe joint edge are threadedly connected, and the fifth pipe joint edge and the relief pipe are welded.

[0025] Compared with the prior art, the present invention has the following technical effects:

[0026] If the tank container transportation cycle is long, you can choose the overflow pipeline with the nozzle position corresponding to the initial filling rate indicator line; conversely, you can choose the overflow pipeline with the nozzle position corresponding to the rated filling rate indicator line. According to the different tank container transportation conditions, select the overflow pipeline corresponding to the corresponding filling rate indicator line position to maximize the tank container carrying capacity and reduce the transportation cost per unit weight of the goods. In addition, the overflow pipeline structure after the stop valve can timely and effectively display the frosting phenomenon of the pipeline when the liquid medium flows through the pipeline, which is convenient for accurately judging whether the liquid level of the medium in the tank container has reached the corresponding height.

[0027] The present invention arranges a dual overflow pipeline structure in the tank container, that is, a pipeline structure with different overflow pipelines corresponding to different filling rates; a pipeline structure for gaseous medium and liquid medium at the end of the overflow pipeline, that is, the gaseous medium and liquid medium flow through different pipeline structures during the overflow process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 For the present invention Figure 1 Partial enlargement.

[0030] The meanings of the numbers in the figure are: 1-first internal overflow pipe, 2-second internal overflow pipe, 3-first interlayer overflow pipe, 4-second interlayer overflow pipe, 5-first external overflow pipe, 6-second external overflow pipe, 7-third external overflow pipe, 8-fourth external overflow pipe, 9-fifth external overflow pipe, 10-sixth external overflow pipe, 11-seventh external overflow pipe;

[0031] 100-inner tank, 101-inner tank head;

[0032] 201 - first pipe connection edge, 202 - second pipe connection edge, 203 - third pipe connection edge, 204 - fourth pipe connection edge, 205 - fifth pipe connection edge;

[0033] 301-first stop valve, 302-second stop valve,

[0034] 401-four-way socket welding pipe fittings, 402-three-way socket welding pipe fittings,

[0035] 501-vent pipe; 601-pipe joint;

[0036] A-maximum filling rate indicator line, B-rated filling rate indicator line, C-initial filling rate indicator line. DETAILED DESCRIPTION

[0037] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0038] Embodiment 1:

[0039] Following the above technical solution, Figure 1 to Figure 2 As shown, this embodiment provides an overflow pipeline for a refrigerated liquefied gas tank container, comprising:

[0040] The first internal overflow pipe 1 and the second internal overflow pipe 2 are used to be installed in the inner tank body 100 of the tank container; the first interlayer overflow pipe 3 and the second interlayer overflow pipe 4 are used to be installed in the vacuum interlayer between the inner tank body 100 and the outer shell of the tank container; the first external overflow pipe 5, the second external overflow pipe 6, the third external overflow pipe 7, the fourth external overflow pipe 8, the fifth external overflow pipe 9, the sixth external overflow pipe 10 and the seventh external overflow pipe 11 are used to be installed outside the outer shell of the tank container.

[0041] Among them, the first internal overflow pipe 1 is sealed and connected to the first interlayer overflow pipe 3 through the first pipe joint edge 201, the first interlayer overflow pipe 3 is sealed and connected to the first external overflow pipe 5 through the third pipe joint edge 203, and a first stop valve 301 is provided between the first external overflow pipe 5 and the second external overflow pipe 6; the second internal overflow pipe 2 is sealed and connected to the second interlayer overflow pipe 4 through the second pipe joint edge 202, the second interlayer overflow pipe 4 is sealed and connected to the third external overflow pipe 7 through the fourth pipe joint edge 204, and a second stop valve 302 is provided between the third external overflow pipe 7 and the 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 connected 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 connected through a three-way socket welding pipe fitting 402; the seventh external overflow pipe 11 is connected to the vent pipe 501.

[0042] The tank container includes an inner tank body 100 and an outer shell sleeved outside the inner tank body 100, and the end of the inner tank body 100 is an inner tank body head 101; on the upper part of the inner tank body 100, three horizontal lines are marked from top to bottom: a maximum filling rate indication line A, a rated filling rate indication line B and an initial filling rate indication line C; the position of the pipe mouth of the first internal overflow pipe 1 corresponds to the initial filling rate indication line C, and the position of the pipe mouth of the second internal overflow pipe 2 corresponds to the rated filling rate indication line B. In this embodiment, more specifically, the first internal overflow pipe 1 and the second internal overflow pipe 2 are arranged vertically near the pipe mouth, and then bent 90 degrees to extend horizontally to near the inner tank head 101, so as to be conveniently connected with the first pipe edge 201 and the second pipe edge 202 respectively through the bending structure; the first interlayer overflow pipe 3 and the second interlayer overflow pipe 4 are bent structures near the first pipe edge 201 and the second pipe edge 202, so as to be conveniently connected with the first pipe edge 201 and the second pipe edge 202, and the bent first interlayer overflow pipe 3 and the second interlayer overflow pipe 4 extend downward in the vacuum interlayer to near the third pipe edge 203 and the fourth pipe edge 204 and are respectively connected with the third pipe edge 203 and the fourth pipe edge 204 through the bending structure. The first stop valve 301, the second stop valve 302, the four-way socket welding pipe 401, the three-way socket welding pipe 402, the seventh external overflow pipe 11 and the vent pipe 501 are all located below the initial filling rate indicator line C to achieve overflow control.

[0043] The two ends of the first pipe edge 201 are respectively socket welded to the first internal overflow pipe 1 and the first interlayer overflow pipe 3, and the first pipe edge 201 penetrates and is welded to the inner tank head 101; the two ends of the second pipe edge 202 are respectively socket welded to the second internal overflow pipe 2 and the second interlayer overflow pipe 4, and the second pipe edge 202 penetrates and is welded to the inner tank head 101.

[0044] The two ends of the third pipe edge 203 are respectively connected to the first interlayer overflow pipe 3 and the first external overflow pipe 5, and the third pipe edge 203 penetrates and is welded to the outer shell; the two ends of the fourth pipe edge 204 are respectively connected to the second interlayer overflow pipe 4 and the third external overflow pipe 7, and the fourth pipe edge 204 penetrates and is welded to the outer shell.

[0045] One end of the first external overflow pipe 5 is butt-welded to one end of the first stop valve 301, and one end of the second external overflow pipe 6 is connected to the other end of the first stop valve 301 by a sleeve; one end of the third external overflow pipe 7 is butt-welded to one end of the second stop valve 302, and one end of the fourth external overflow pipe 8 is connected to the other end of the second stop valve 302 by a sleeve.

[0046] 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 all socket welded to the four-way socket welding pipe fitting 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 all socket welded to the three-way socket welding pipe fitting 402.

[0047] The other end of the seventh external overflow pipe 11 is connected to a ferrule-type pipe joint 601 , and the ferrule-type pipe joint 601 and the vent pipe 501 are sealed and connected via the fifth pipe joint edge 205 ; the ferrule-type pipe joint 601 and the fifth pipe joint edge 205 are threadedly connected, and the fifth pipe joint edge 205 and the vent pipe 501 are welded.

[0048] exist Figure 1 In the figure, A is the maximum filling rate indicator line, B is the rated filling rate indicator line, and C is the initial filling rate indicator line; the lower ports of the first internal overflow pipe 1 and the second internal overflow pipe 2 are located at the positions corresponding to the initial filling rate indicator line and the rated filling rate indicator line, respectively. By setting overflow pipelines corresponding to the internal initial filling rate and the rated filling rate, overflow pipelines corresponding to the interlayer initial filling rate and the rated filling rate, overflow pipelines corresponding to the external initial filling rate and the rated filling rate, and overflow medium gas phase and liquid phase separation structure in the external overflow pipeline of the tank container on the tank container, the liquid level height of the medium in the tank container can be accurately indicated under different working conditions.

[0049] The dual overflow pipeline structure of the tank container in this embodiment can realize the pipeline structure of different overflow pipelines corresponding to different filling rates; thus, the overflow pipeline corresponding to the corresponding filling rate can be selected according to the different tank container transportation conditions, so as to maximize the tank container carrying capacity and reduce the transportation cost of the unit weight of the goods. Specifically, when long-distance transportation is to be achieved, such as long-distance transportation with a transportation time of about 3 months, the first internal overflow pipe 1 and its connected first interlayer overflow pipe 3, the first external overflow pipe 5, the first stop valve 301, and the second external overflow pipe 6 are selected to work, and the overflow pipeline structure after the first stop valve 301 can timely and effectively show the pipeline frost phenomenon when the liquid medium flows through the pipeline, so as to accurately judge whether the liquid level of the medium in the tank container has reached the corresponding height. When short-distance transportation is to be achieved, the second internal overflow pipe 2 and its connected second interlayer overflow pipe 4, the third external overflow pipe 7, the second stop valve 302 and the fourth external overflow pipe 8 are selected to work. The overflow pipeline structure after the second stop valve 302 can timely and effectively display the frosting phenomenon of the pipeline when the liquid medium flows through the pipeline, which is convenient for accurately judging whether the liquid level of the medium in the tank container has reached the corresponding height.

[0050] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0051] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0052] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An overflow pipeline for a refrigerated liquefied gas tank container, It is characterized in that include: A first internal overflow pipe (1) and a second internal overflow pipe (2) for being installed in an inner tank body (100) of a tank container; A first interlayer overflow pipe (3) and a second interlayer overflow pipe (4) are used to be installed in the vacuum interlayer between the inner tank body (100) and the outer shell of the tank container; 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), which are installed outside the outer shell of the tank container; The first internal overflow pipe (1) is sealed and connected to the first interlayer overflow pipe (3) through the first pipe joint edge (201); the first interlayer overflow pipe (3) is sealed and connected to the first external overflow pipe (5) through the third pipe joint edge (203); a first stop valve (301) is provided between the first external overflow pipe (5) and the second external overflow pipe (6); the second internal overflow pipe (2) is sealed and connected to the second interlayer overflow pipe (4) through the second pipe joint edge (202); the second interlayer overflow pipe (4) is sealed and connected to the third external overflow pipe (5) through the fourth pipe joint edge (204); The overflow pipe (7), a second stop valve (302) is provided between the third external overflow pipe (7) and the 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 connected via a four-way socket welding pipe fitting (401); the fifth external overflow pipe (9), the sixth external overflow pipe (10) and the seventh external overflow pipe (11) are connected via a three-way socket welding pipe fitting (402); the seventh external overflow pipe (11) is connected to the vent pipe (501); The tank box comprises the inner tank body (100) and the outer shell sleeved outside the inner tank body (100), and the end of the inner tank body (100) is an inner tank body head (101); On the upper part of the inner tank body (100), three horizontal lines are marked in order from top to bottom: a maximum filling rate indication line A, a rated filling rate indication line B and an initial filling rate indication line C; The position of the pipe opening of the first internal overflow pipe (1) corresponds to the initial filling rate indicator line C, and the position of the pipe opening of the second internal overflow pipe (2) corresponds to the rated filling rate indicator 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 vent pipe (501) are all located below the initial filling rate indicator line C; The two ends of the first pipe joint edge (201) are respectively socket-welded to the first internal overflow pipe (1) and the first interlayer overflow pipe (3), and the first pipe joint edge (201) penetrates and is welded to the inner tank body head (101); The two ends of the third pipe connection edge (203) are respectively socket-welded to the first interlayer overflow pipe (3) and the first external overflow pipe (5), and the third pipe connection edge (203) penetrates and is welded to the outer shell; The two ends of the second pipe joint edge (202) are respectively socket-welded to the second internal overflow pipe (2) and the second interlayer overflow pipe (4), and the second pipe joint edge (202) penetrates and is welded to the inner tank body head (101); The two ends of the fourth pipe connection edge (204) are respectively connected to the second interlayer overflow pipe (4) and the third external overflow pipe (7), and the fourth pipe connection edge (204) penetrates and is welded to the outer shell; One end of the first external overflow pipe (5) is butt-welded to one end of the first stop valve (301), and one end of the second external overflow pipe (6) is connected to the other end of the first stop valve (301) in a sleeve-type manner; One end of the third external overflow pipe (7) is butt-welded to one end of the second stop valve (302), and one end of the fourth external overflow pipe (8) is connected to the other end of the second stop valve (302) in a sleeve-type manner; 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 all socket-welded to the four-way socket-welded pipe fitting (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 all socket-welded to the three-way socket-welded pipe fitting (402); The other end of the seventh external overflow pipe (11) is connected to a ferrule-type pipe joint (601), and the ferrule-type pipe joint (601) and the discharge pipe (501) are sealed and connected via a fifth pipe connection edge (205); the ferrule-type pipe joint (601) and the fifth pipe connection edge (205) are threadedly connected, and the fifth pipe connection edge (205) and the discharge pipe (501) are welded; The first internal overflow pipe (1) and the second internal overflow pipe (2) are arranged vertically near the pipe mouth, and then bent 90 degrees to extend horizontally to near the inner tank body head (101), and can be conveniently connected to the first pipe edge (201) and the second pipe edge (202) respectively through the bending structure; the first interlayer overflow pipe (3) and the second interlayer overflow pipe (4) are bent structures near the first pipe edge (201) and the second pipe edge (202), and can be conveniently connected to the first pipe edge (201) and the second pipe edge (202), and the bent first interlayer overflow pipe (3) and the second interlayer overflow pipe (4) extend downward in the vacuum interlayer to near the third pipe edge (203) and the fourth pipe edge (204), and can be conveniently connected to the third pipe edge (203) and the fourth pipe edge (204) respectively through the bending structure.

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