Automatic emptying device for low-temperature liquid tank container

Abstract

The invention provides an automatic emptying device for a low-temperature liquid tank container, which is characterized in that an external emptying pipe is led out from a safety valve, the external emptying pipe is vertically fixed on an outer tank of the tank container, a top self-plugging structure is fixedly arranged at the top of the external emptying pipe, and a bottom self-plugging structure is fixedly arranged at the bottom of the external emptying pipe. The bottom self-plugging structure of the container located on the upper portion and the top self-plugging structure of the container located on the lower portion are connected together in a plugging mode, rapid centralized emptying of large-scale transportation low-temperature tanks and containers is achieved, and the transportation volume, the transportation volume and the transportation distance of the tanks and containers can be effectively increased.

Description

Technical Field

[0001] The invention relates to the technical field of cryogenic liquid tanks, in particular to an automatic emptying device for a cryogenic liquid tank container. Background Art

[0002] Due to heat leakage, part of the liquid will evaporate during the storage and transportation of cryogenic liquids, causing the pressure in the tank to increase. Figure 2 , including a tank frame 1, an outer tank 2, an inner tank 3, a safety valve 4, a vent pipe 5, and a valve box 9. The vent pipe 5 is led out from the side wall of the valve box 9 through the safety valve 4 for venting. At present, there is no venting during the transportation of large-scale cryogenic liquid tank containers (hereinafter referred to as tank containers). In order to avoid excessive pressure in the tank container, the current filling rate of the cryogenic liquid tank container is low and the transportation time is short. At the same time, the internal state of the tank container needs to be monitored in real time during the transportation process, and the lossless maintenance time is predicted to ensure that the safety valve will not trip in the middle. In the case of no venting during the transportation of cryogenic liquid tank containers, the filling rate and transportation time of the tank container are limited, resulting in low volume transportation and short transportation distance. In the transportation process, the internal state of the tank container needs to be monitored in real time, and the lossless maintenance time is predicted to ensure that the safety valve will not trip in the middle. For large-scale tank container storage and transportation, this requires high requirements for the monitoring system and large monitoring volume. In the case of no venting restrictions during the transportation of cryogenic liquid tank containers, if a failure occurs, it is easy to cause a major safety accident. Summary of the invention

[0003] The present invention solves the problem of limiting the filling rate and transportation time of low-temperature liquid tank containers when they are transported without emptying, and proposes an automatic emptying device for low-temperature liquid tank containers, which can realize the rapid centralized emptying of low-temperature tank containers for large-scale transportation, and can effectively increase the volume and distance of tank container transportation. At the same time, the emptying structure of the self-plug connection is a mechanical mechanism, which automatically empties when the pressure in the tank increases, without the need for electrical signals to be transmitted to the monitoring system and feedback operation, which can significantly reduce the amount of monitoring and enhance the safety of large-scale tank container transportation.

[0004] In order to achieve the above objectives, the following technical solutions are proposed: An automatic venting device for a low-temperature liquid tank container is disclosed. An external venting pipe is led out from a safety valve and fixed vertically on an outer tank of the tank container. A top self-plugging structure is fixedly provided on the top of the external venting pipe, and a bottom self-plugging structure is fixedly provided on the bottom of the external venting pipe. When the containers are stacked, the bottom self-plugging structure of the container located above is plugged and connected with the top self-plugging structure of the container located below.

[0005] The present invention utilizes a self-plugging emptying structure, so that the tank container can be quickly and centrally emptied during transportation, effectively increasing the volume of the tank container and meeting the requirements of long-term and long-distance transportation. The venting structure of the self-plug connection is a mechanical mechanism, which automatically vents when the pressure in the tank increases. There is no need to transmit electrical signals to the monitoring system and feedback operation, which can significantly reduce the amount of monitoring; The self-pluggable venting structure automatically vents when the pressure inside the tank increases, enhancing the safety of tank container transportation.

[0006] Preferably, the external vent pipe includes a third vent pipe connected to the safety valve at one end and a first vent pipe and a second vent pipe vertically connected and fixed together, and the other end of the third vent pipe is connected and fixed at the connection between the first vent pipe and the second vent pipe.

[0007] The external vent pipe of the present invention includes a first vent pipe, a second vent pipe and a third vent pipe, the safety valve is connected to one end of the third vent pipe, and the other end of the third vent pipe is connected and fixed to the connection of the second vent pipe. The first vent pipe and the second vent pipe are vertically connected and fixed together. The connection forms of the first vent pipe, the second vent pipe and the third vent pipe include but are not limited to welding, snap-fit, flange and other forms, forming a T-shaped vent structure. The top of the first vent pipe is connected to the top self-plugging structure, and the connection forms include but are not limited to welding, snap-fit, flange and other forms. The bottom of the second vent pipe is connected to the bottom self-plugging structure, and the connection forms include but are not limited to welding, snap-fit, flange and other forms.

[0008] Preferably, the first vent pipe, the second vent pipe and the third vent pipe are fixed on the outer tank of the tank box by a plurality of pipe clamps.

[0009] The first vent pipe, the second vent pipe and the third vent pipe of the present invention are fixed on the outer tank of the tank box by using a plurality of pipe clamps, and the pipe clamps are arranged according to actual fixing needs.

[0010] Preferably, the external vent pipe is provided with a flame arrester for fire isolation on the external vent pipe.

[0011] The external vent pipe of the present invention is provided with a flame arrester, which is arranged on the first vent pipe, and performs fire isolation on the external vent pipe to prevent flashback accidents.

[0012] Preferably, the external vent pipe is provided with a connecting valve for controlling the on-off of the external vent pipe.

[0013] The external vent pipe of the present invention, especially the second vent pipe, is provided with a connecting valve, which is used to control the on-off of the external vent pipe to prevent the exhaust air of the single tank from being used and the bottom tank box from being discharged downward. When the tank boxes are stacked, the top self-plugging structure of the lower tank box supports the bottom self-plugging structure of the upper tank box. At this time, the connecting valve is opened by displacement or pressure, and the form includes but is not limited to various mechanical valves, such as a one-way valve.

[0014] Preferably, the top self-plugging structure is inserted into or sleeved into the bottom self-plugging structure.

[0015] In the present invention, when stacking tanks, the top self-plugging structure of the lower tank is inserted or inserted into the bottom self-plugging structure of the upper tank, and the shapes of the top self-plugging structure and the bottom self-plugging structure include but are not limited to frustum, prism, cylinder, prism, etc. The structural dimensions of the top self-plugging structure and the bottom self-plugging structure should take into account the tolerance of the frame and the tank to ensure that the top self-plugging structure and the bottom self-plugging structure can be aligned.

[0016] Preferably, the top of the top self-plugging structure is higher than the top of the tank frame, and the bottom of the bottom self-plugging structure is flush with the bottom of the tank frame.

[0017] In order to facilitate stacking and alignment, the top of the top self-plugging structure of the present invention is slightly higher than the top of the tank frame, and the bottom of the bottom self-plugging structure should be flush with the bottom of the tank frame.

[0018] Preferably, a sealing material is provided between the top self-plugging structure and the bottom self-plugging structure.

[0019] A sealing material is provided between the bottom self-plugging structure and the top self-plugging structure of the present invention, so that the top self-plugging structure of the lower tank box, the bottom self-plugging structure of the upper tank box and the first venting pipe and the second venting pipe form a quick venting channel.

[0020] Preferably, the sealing material is fixed only to one of the top self-plugging structure or the bottom self-plugging structure.

[0021] The sealing material of the present invention is only fixed on one of the bottom self-plugging structure or the top self-plugging structure.

[0022] Preferably, the sealing material is made of polytetrafluoroethylene.

[0023] The beneficial effects of the present invention are: 1. The self-plugging emptying structure allows the tank container to be quickly and centrally emptied during transportation, effectively increasing the volume of the tank container and meeting the requirements of long-term and long-distance transportation. 2. The venting structure of the self-plug connection is a mechanical mechanism. It automatically vents when the pressure in the tank increases. There is no need to transmit electrical signals to the monitoring system and feedback operation, which can significantly reduce the amount of monitoring. 3. The self-plugging venting structure automatically vents when the pressure in the tank increases, enhancing the safety of tank container transportation BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the present invention.

[0025] Figure 2 It is a structural diagram of the prior art.

[0026] Figure 3 This is a schematic diagram of the self-plugging structure of Example 3.

[0027] Figure 4 It is a schematic diagram of the self-plugging structure of Example 4.

[0028] Wherein: 1, tank box frame; 2, tank outer tank; 3, tank inner tank; 4, safety valve; 5, vent pipe; 501, first vent pipe; 502, second vent pipe; 503, third vent pipe; 6, flame arrester; 701, top self-plugging structure; 702, bottom self-plugging structure; 8, pipe clamp; 9, valve box; 10, connecting valve; 7011, first shell; 7012, first sealing material; 7021, second shell; 7022, second sealing material. DETAILED DESCRIPTION

[0029] Embodiment 1: This embodiment provides an automatic emptying device for a cryogenic liquid tank container. Figure 1 , including a tank frame 1, an outer tank 2, an inner tank 3, a safety valve 4, a vent pipe 5, an external vent pipe, a self-plugging connection structure, a pipe clamp 8, a valve box 9, and a connecting valve 10. The self-plugging connection structure includes a bottom self-plugging structure 702 and a top self-plugging structure 701. The external vent pipe is led out from the safety valve 4. The external vent pipe is vertically fixed on the outer tank 2 of the tank. The top of the external vent pipe is fixedly connected with the top self-plugging structure 701. The bottom self-plugging structure 702 of the container located above, when the containers are stacked, the bottom self-plugging structure 702 of the container located above is plugged and connected with the top self-plugging structure 701 of the container located below. The present invention utilizes a self-plugging emptying structure, which can quickly and centrally emptied the tank container during transportation, effectively increasing the volume transportation capacity of the tank container while meeting the requirements of long-term and long-distance transportation; the self-plugging emptying structure is a mechanical mechanism, which automatically empties when the pressure in the tank increases, and does not require electrical signals to be transmitted to the monitoring system and feedback operations, which can significantly reduce the amount of monitoring; the self-plugging emptying structure automatically empties when the pressure in the tank increases, thereby enhancing the safety of tank container transportation.

[0030] The external vent pipe of the present invention includes a first vent pipe 501, a second vent pipe 502 and a third vent pipe 503, the safety valve 4 is connected to one end of the third vent pipe 503, and the other end of the third vent pipe 503 is connected and fixed at the connection between the second vent pipe 502 and the first vent pipe 501. The first vent pipe 501 and the second vent pipe 502 are vertically connected and fixed together. The connection forms of the first vent pipe 501, the second vent pipe 502 and the third vent pipe 503 include but are not limited to welding, snap-fit, flange and the like, forming a T-shaped vent structure. The top of the first vent pipe 501 is connected to the top self-plug structure 701, and the connection forms include but are not limited to welding, snap-fit, flange and the like. The bottom of the second vent pipe 502 is connected to the bottom self-plug structure 702, and the connection forms include but are not limited to welding, snap-fit, flange and the like.

[0031] The first vent pipe 501, the second vent pipe 502, and the third vent pipe 503 of the present invention are fixed to the outer tank 2 of the tank box by using a plurality of pipe clamps 8, and the pipe clamps 8 are arranged according to actual fixing needs.

[0032] A connecting valve 10 is provided on the external vent pipe of the present invention, especially on the second vent pipe 502. The connecting valve 10 is used to control the on-off of the external vent pipe to prevent the exhaust air of the single tank from being used and the bottom tank box from being discharged downward. When the tank boxes are stacked, the top self-plugging structure 701 of the lower tank box supports the bottom self-plugging structure 702 of the upper tank box. At this time, the connecting valve 10 is opened by displacement or pressure, and the form includes but is not limited to various mechanical valves, such as a one-way valve.

[0033] In the present invention, when stacking tanks, the top self-plugging structure 701 of the lower tank is inserted or inserted into the bottom self-plugging structure 702 of the upper tank, and the shapes of the top self-plugging structure 701 and the bottom self-plugging structure 702 include but are not limited to frustum, prism, cylinder, prism, etc. The structural dimensions of the top self-plugging structure 701 and the bottom self-plugging structure 702 should take into account the tolerance of the frame and the tank to ensure that the top self-plugging structure 701 and the bottom self-plugging structure 702 can be aligned.

[0034] In order to facilitate stacking and alignment, the top of the top self-plugging structure 701 of the present invention is slightly higher than the top of the tank frame 1 , and the bottom of the bottom self-plugging structure 702 should be flush with the bottom of the tank frame 1 .

[0035] A sealing material is provided between the bottom self-plugging structure 702 and the top self-plugging structure 701 of the present invention, so that the top self-plugging structure 701 of the lower tank box, the bottom self-plugging structure 702 of the upper tank box and the first venting pipe 501 and the second venting pipe 502 form a quick venting channel.

[0036] The sealing material of the present invention is only fixed on one of the bottom self-plugging structure 702 or the top self-plugging structure 701 .

[0037] Embodiment 2: This embodiment optimizes the fire protection of the external vent pipe on the basis of embodiment 1 and proposes an automatic venting device for a low-temperature liquid tank container. Figure 1 , including a tank frame 1, an outer tank 2, an inner tank 3, a safety valve 4, a vent pipe 5, an external vent pipe, a flame arrester 6, a self-plugging connection structure, a pipe clamp 8, a valve box 9, and a connecting valve 10. The self-plugging connection structure includes a bottom self-plugging structure 702 and a top self-plugging structure 701. The external vent pipe is led out from the safety valve 4. The external vent pipe is vertically fixed on the outer tank 2 of the tank. The top of the external vent pipe is fixedly connected with the top self-plugging structure 701. The bottom self-plugging structure 702 of the container located above, when the containers are stacked, the bottom self-plugging structure 702 of the container located above is plugged and connected with the top self-plugging structure 701 of the container located below. The present invention utilizes a self-plugging emptying structure, which can quickly and centrally emptied the tank container during transportation, effectively increasing the volume transportation capacity of the tank container while meeting the requirements of long-term and long-distance transportation; the self-plugging emptying structure is a mechanical mechanism, which automatically empties when the pressure in the tank increases, and does not require electrical signals to be transmitted to the monitoring system and feedback operations, which can significantly reduce the amount of monitoring; the self-plugging emptying structure automatically empties when the pressure in the tank increases, thereby enhancing the safety of tank container transportation.

[0038] The external vent pipe of the present invention includes a first vent pipe 501, a second vent pipe 502 and a third vent pipe 503, the safety valve 4 is connected to one end of the third vent pipe 503, and the other end of the third vent pipe 503 is connected and fixed at the connection between the second vent pipe 502 and the first vent pipe 501. The first vent pipe 501 and the second vent pipe 502 are vertically connected and fixed together. The connection forms of the first vent pipe 501, the second vent pipe 502 and the third vent pipe 503 include but are not limited to welding, snap-fit, flange and the like, forming a T-shaped vent structure. The top of the first vent pipe 501 is connected to the top self-plug structure 701, and the connection forms include but are not limited to welding, snap-fit, flange and the like. The bottom of the second vent pipe 502 is connected to the bottom self-plug structure 702, and the connection forms include but are not limited to welding, snap-fit, flange and the like.

[0039] The first vent pipe 501, the second vent pipe 502, and the third vent pipe 503 of the present invention are fixed to the outer tank 2 of the tank box by using a plurality of pipe clamps 8, and the pipe clamps 8 are arranged according to actual fixing needs.

[0040] The external vent pipe of the present invention is provided with a flame arrester 6, which is arranged on the first vent pipe 501, and performs fire isolation on the external vent pipe to prevent flashback accidents.

[0041] A connecting valve 10 is provided on the external vent pipe of the present invention, especially on the second vent pipe 502. The connecting valve 10 is used to control the on-off of the external vent pipe to prevent the exhaust air of the single tank from being used and the bottom tank box from being discharged downward. When the tank boxes are stacked, the top self-plugging structure 701 of the lower tank box supports the bottom self-plugging structure 702 of the upper tank box. At this time, the connecting valve 10 is opened by displacement or pressure, and the form includes but is not limited to various mechanical valves, such as a one-way valve.

[0042] In the present invention, when stacking tanks, the top self-plugging structure 701 of the lower tank is inserted or inserted into the bottom self-plugging structure 702 of the upper tank, and the shapes of the top self-plugging structure 701 and the bottom self-plugging structure 702 include but are not limited to frustum, prism, cylinder, prism, etc. The structural dimensions of the top self-plugging structure 701 and the bottom self-plugging structure 702 should take into account the tolerance of the frame and the tank to ensure that the top self-plugging structure 701 and the bottom self-plugging structure 702 can be aligned.

[0043] In order to facilitate stacking and alignment, the top of the top self-plugging structure 701 of the present invention is slightly higher than the top of the tank frame 1 , and the bottom of the bottom self-plugging structure 702 should be flush with the bottom of the tank frame 1 .

[0044] A sealing material is provided between the bottom self-plugging structure 702 and the top self-plugging structure 701 of the present invention, so that the top self-plugging structure 701 of the lower tank box, the bottom self-plugging structure 702 of the upper tank box and the first venting pipe 501 and the second venting pipe 502 form a quick venting channel.

[0045] The sealing material of the present invention is only fixed on one of the bottom self-plugging structure 702 or the top self-plugging structure 701 .

[0046] Embodiment 3: This embodiment defines the self-plugging structure on the basis of Embodiment 2, and proposes an automatic emptying device for a low-temperature liquid tank container. Figure 1, including a tank frame 1, an outer tank 2, an inner tank 3, a safety valve 4, a vent pipe 5, an external vent pipe, a flame arrester 6, a self-plugging connection structure, a pipe clamp 8, a valve box 9, and a connecting valve 10. The self-plugging connection structure includes a bottom self-plugging structure 702 and a top self-plugging structure 701. The external vent pipe is led out from the safety valve 4. The external vent pipe is vertically fixed on the outer tank 2 of the tank. The top of the external vent pipe is fixedly connected with the top self-plugging structure 701. The bottom self-plugging structure 702 of the container located above, when the containers are stacked, the bottom self-plugging structure 702 of the container located above is plugged and connected with the top self-plugging structure 701 of the container located below. The present invention utilizes a self-plugging emptying structure, which can quickly and centrally emptied the tank container during transportation, effectively increasing the volume transportation capacity of the tank container while meeting the requirements of long-term and long-distance transportation; the self-plugging emptying structure is a mechanical mechanism, which automatically empties when the pressure in the tank increases, and does not require electrical signals to be transmitted to the monitoring system and feedback operations, which can significantly reduce the amount of monitoring; the self-plugging emptying structure automatically empties when the pressure in the tank increases, thereby enhancing the safety of tank container transportation.

[0047] The external vent pipe of the present invention includes a first vent pipe 501, a second vent pipe 502 and a third vent pipe 503, the safety valve 4 is connected to one end of the third vent pipe 503, and the other end of the third vent pipe 503 is connected and fixed at the connection between the second vent pipe 502 and the first vent pipe 501. The first vent pipe 501 and the second vent pipe 502 are vertically connected and fixed together. The connection forms of the first vent pipe 501, the second vent pipe 502 and the third vent pipe 503 include but are not limited to welding, snap-fit, flange and the like, forming a T-shaped vent structure. The top of the first vent pipe 501 is connected to the top self-plug structure 701, and the connection forms include but are not limited to welding, snap-fit, flange and the like. The bottom of the second vent pipe 502 is connected to the bottom self-plug structure 702, and the connection forms include but are not limited to welding, snap-fit, flange and the like.

[0048] The first vent pipe 501, the second vent pipe 502, and the third vent pipe 503 of the present invention are fixed to the outer tank 2 of the tank box by using a plurality of pipe clamps 8, and the pipe clamps 8 are arranged according to actual fixing needs.

[0049] The external vent pipe of the present invention is provided with a flame arrester 6, which is arranged on the first vent pipe 501, and performs fire isolation on the external vent pipe to prevent flashback accidents.

[0050] A connecting valve 10 is provided on the external vent pipe of the present invention, especially on the second vent pipe 502. The connecting valve 10 is used to control the on-off of the external vent pipe to prevent the exhaust air of the single tank from being used and the bottom tank box from being discharged downward. When the tank boxes are stacked, the top self-plugging structure 701 of the lower tank box supports the bottom self-plugging structure 702 of the upper tank box. At this time, the connecting valve 10 is opened by displacement or pressure, and the form includes but is not limited to various mechanical valves, such as a one-way valve.

[0051] In the present invention, when stacking tanks, the top self-plugging structure 701 of the lower tank is inserted or inserted into the bottom self-plugging structure 702 of the upper tank, and the shapes of the top self-plugging structure 701 and the bottom self-plugging structure 702 include but are not limited to frustum, prism, cylinder, prism, etc. The structural dimensions of the top self-plugging structure 701 and the bottom self-plugging structure 702 should take into account the tolerance of the frame and the tank to ensure that the top self-plugging structure 701 and the bottom self-plugging structure 702 can be aligned.

[0052] In order to facilitate stacking and alignment, the top of the top self-plugging structure 701 of the present invention is slightly higher than the top of the tank frame 1 , and the bottom of the bottom self-plugging structure 702 should be flush with the bottom of the tank frame 1 .

[0053] A sealing material is provided between the bottom self-plugging structure 702 and the top self-plugging structure 701 of the present invention, so that the top self-plugging structure 701 of the lower tank box, the bottom self-plugging structure 702 of the upper tank box and the first venting pipe 501 and the second venting pipe 502 form a quick venting channel.

[0054] The sealing material of the present invention is only fixed on one of the bottom self-plugging structure 702 or the top self-plugging structure 701 .

[0055] like Figure 3 As shown, the self-plugging connection structure 1 proposed by the present invention, the top self-plugging structure 701 includes a first shell 7011 and a first sealing material 7012, the bottom self-plugging structure 702 includes a second shell 7021, and the first sealing material 7012 includes but is not limited to polytetrafluoroethylene. When the tank containers are stacked, the top self-plugging structure 701 of the lower tank container covers the bottom self-plugging structure 702 of the upper tank container, and the top self-plugging structure 701 of the lower tank container, the bottom self-plugging structure 702 of the upper tank container and the first venting pipe 501 and the second venting pipe 502 form a rapid venting channel. The outer wall surface of the second shell 7021 of the bottom self-plugging structure 702 and the first sealing material 7012 of the top self-plugging structure 701 are squeezed and rubbed to form a seal.

[0056] The shapes of the top self-plugging structure 701 and the bottom self-plugging structure 702 include but are not limited to a truncated cone, a prism, a cylinder, a prism, etc. The structural dimensions of the top self-plugging structure 701 and the bottom self-plugging structure 702 should take into account the tolerances of the frame and the tank container to ensure that the top self-plugging structure 701 and the bottom self-plugging structure 702 can be aligned. In order to facilitate stacking and alignment, the top of the top self-plugging structure 701 should be slightly higher than the top of the frame 1, and the bottom of the bottom self-plugging structure 702 should be flush with the bottom of the frame 1.

[0057] Embodiment 4: This embodiment defines the self-plugging structure on the basis of Embodiment 2, and proposes an automatic emptying device for a low-temperature liquid tank container. Figure 1 , including a tank frame 1, an outer tank 2, an inner tank 3, a safety valve 4, a vent pipe 5, an external vent pipe, a flame arrester 6, a self-plugging connection structure, a pipe clamp 8, a valve box 9, and a connecting valve 10. The self-plugging connection structure includes a bottom self-plugging structure 702 and a top self-plugging structure 701. The external vent pipe is led out from the safety valve 4. The external vent pipe is vertically fixed on the outer tank 2 of the tank. The top of the external vent pipe is fixedly connected with the top self-plugging structure 701. The bottom self-plugging structure 702 of the container located above, when the containers are stacked, the bottom self-plugging structure 702 of the container located above is plugged and connected with the top self-plugging structure 701 of the container located below. The present invention utilizes a self-plugging emptying structure, which can quickly and centrally emptied the tank container during transportation, effectively increasing the volume transportation capacity of the tank container while meeting the requirements of long-term and long-distance transportation; the self-plugging emptying structure is a mechanical mechanism, which automatically empties when the pressure in the tank increases, and does not require electrical signals to be transmitted to the monitoring system and feedback operations, which can significantly reduce the amount of monitoring; the self-plugging emptying structure automatically empties when the pressure in the tank increases, thereby enhancing the safety of tank container transportation.

[0058] The external vent pipe of the present invention includes a first vent pipe 501, a second vent pipe 502 and a third vent pipe 503, the safety valve 4 is connected to one end of the third vent pipe 503, and the other end of the third vent pipe 503 is connected and fixed at the connection between the second vent pipe 502 and the first vent pipe 501. The first vent pipe 501 and the second vent pipe 502 are vertically connected and fixed together. The connection forms of the first vent pipe 501, the second vent pipe 502 and the third vent pipe 503 include but are not limited to welding, snap-fit, flange and the like, forming a T-shaped vent structure. The top of the first vent pipe 501 is connected to the top self-plug structure 701, and the connection forms include but are not limited to welding, snap-fit, flange and the like. The bottom of the second vent pipe 502 is connected to the bottom self-plug structure 702, and the connection forms include but are not limited to welding, snap-fit, flange and the like.

[0059] The first vent pipe 501, the second vent pipe 502, and the third vent pipe 503 of the present invention are fixed to the outer tank 2 of the tank box by using a plurality of pipe clamps 8, and the pipe clamps 8 are arranged according to actual fixing needs.

[0060] The external vent pipe of the present invention is provided with a flame arrester 6, which is arranged on the first vent pipe 501, and performs fire isolation on the external vent pipe to prevent flashback accidents.

[0061] A connecting valve 10 is provided on the external vent pipe of the present invention, especially on the second vent pipe 502. The connecting valve 10 is used to control the on-off of the external vent pipe to prevent the exhaust air of the single tank from being used and the bottom tank box from being discharged downward. When the tank boxes are stacked, the top self-plugging structure 701 of the lower tank box supports the bottom self-plugging structure 702 of the upper tank box. At this time, the connecting valve 10 is opened by displacement or pressure, and the form includes but is not limited to various mechanical valves, such as a one-way valve.

[0062] In the present invention, when stacking tanks, the top self-plugging structure 701 of the lower tank is inserted or inserted into the bottom self-plugging structure 702 of the upper tank, and the shapes of the top self-plugging structure 701 and the bottom self-plugging structure 702 include but are not limited to frustum, prism, cylinder, prism, etc. The structural dimensions of the top self-plugging structure 701 and the bottom self-plugging structure 702 should take into account the tolerance of the frame and the tank to ensure that the top self-plugging structure 701 and the bottom self-plugging structure 702 can be aligned.

[0063] In order to facilitate stacking and alignment, the top of the top self-plugging structure 701 of the present invention is slightly higher than the top of the tank frame 1 , and the bottom of the bottom self-plugging structure 702 should be flush with the bottom of the tank frame 1 .

[0064] A sealing material is provided between the bottom self-plugging structure 702 and the top self-plugging structure 701 of the present invention, so that the top self-plugging structure 701 of the lower tank box, the bottom self-plugging structure 702 of the upper tank box and the first venting pipe 501 and the second venting pipe 502 form a quick venting channel.

[0065] The sealing material of the present invention is only fixed on one of the bottom self-plugging structure 702 or the top self-plugging structure 701 .

[0066] like Figure 4As shown, the second self-plug-in connection structure proposed by the present invention, the top self-plug-in structure 701 includes a first shell 7011, and the bottom self-plug-in structure 702 includes a second shell 7021 and a second sealing material 7022, and the second sealing material 7022 includes but is not limited to polytetrafluoroethylene and the like. When the tank containers are stacked, the top self-plug-in structure 701 of the lower tank container pushes into the bottom self-plug-in structure 702 of the upper tank container, and the top self-plug-in structure 701 of the lower tank container, the bottom self-plug-in structure 702 of the upper tank container and the first venting pipe 501 and the second venting pipe 502 form a rapid venting channel. The outer wall surface of the outer shell 7011 of the top self-plug-in structure 701 and the second sealing material 7022 of the bottom self-plug-in structure 702 are squeezed and rubbed to form a seal. The top self-plug-in structure 701 and the bottom self-plug-in structure 702 include but are not limited to truncated cones, prisms, cylinders, prisms, etc. The structural dimensions of the top self-plugging structure 701 and the bottom self-plugging structure 702 should take into account the tolerances of the frame and the tank container to ensure that the top self-plugging structure 701 and the bottom self-plugging structure 702 can be aligned. In order to facilitate stacking and alignment, the top of the top self-plugging structure 701 should be slightly higher than the top of the frame 1, and the bottom of the bottom self-plugging structure 702 should be flush with the bottom of the frame 1.

Claims

1. An automatic emptying device for a cryogenic liquid tank container, characterized in that: An external vent pipe is led out from the safety valve (4) and fixed vertically on the outer tank (2) of the tank container. A top self-plugging structure (701) is fixedly provided on the top of the external vent pipe, and a bottom self-plugging structure (702) is fixedly provided on the bottom of the external vent pipe. When the containers are stacked, the bottom self-plugging structure (702) of the container located on the upper side is plugged and connected with the top self-plugging structure (701) of the container located on the lower side.

2. The automatic emptying device for a cryogenic liquid tank container according to claim 1 is characterized in that: The external vent pipe comprises a third vent pipe (503) having one end connected to the safety valve (4) and a first vent pipe (501) and a second vent pipe (502) vertically connected and fixed together, and the other end of the third vent pipe (503) is connected and fixed at the connection between the first vent pipe (501) and the second vent pipe (502).

3. The automatic emptying device for a cryogenic liquid tank container according to claim 2 is characterized in that: The first vent pipe (501), the second vent pipe (502) and the third vent pipe (503) are fixed on the outer tank (2) of the tank box by a plurality of pipe clamps (8).

4. The automatic emptying device for a cryogenic liquid tank container according to claim 1 is characterized in that: The external vent pipe is provided with a flame arrester (6) for fire isolation on the external vent pipe.

5. The automatic emptying device for a cryogenic liquid tank container according to claim 1 is characterized in that: The external vent pipe is provided with a connecting valve (10) for controlling the on-off of the external vent pipe.

6. The automatic emptying device for a cryogenic liquid tank container according to claim 1 is characterized in that: The top self-plugging structure (701) is inserted or sleeved into the bottom self-plugging structure (702).

7. The automatic emptying device for a cryogenic liquid tank container according to claim 6 is characterized in that: The top of the top self-plugging structure (701) is higher than the top of the tank frame (1), and the bottom of the bottom self-plugging structure (702) is flush with the bottom of the tank frame (1).

8. The automatic emptying device for a cryogenic liquid tank container according to claim 6 is characterized in that: A sealing material is provided between the top self-plugging structure (701) and the bottom self-plugging structure (702).

9. The automatic emptying device for a cryogenic liquid tank container according to claim 8, characterized in that: The sealing material is only fixed to one of the top self-plugging structure (701) or the bottom self-plugging structure (702).

10. The automatic emptying device for a cryogenic liquid tank container according to claim 8, characterized in that: The sealing material is polytetrafluoroethylene.

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