Immersed pump pool and liquefaction storage tank device

Abstract

The utility model provides an immersed pump pool and a liquefaction storage tank device, and the liquefaction storage tank device comprises a tank body, the immersed pump pool, a first liquid inlet pipeline and a liquid outlet pipeline. The tank body is used for storing liquefied gas, and a liquid outlet is formed in the tank body. The immersed pump pool is arranged outside the tank body, a containing cavity is formed in the immersed pump pool, and an immersed pump is arranged in the containing cavity. The first liquid inlet pipeline is arranged on the immersed pump pool, one end of the first liquid inlet pipeline is communicated with the liquid outlet, and the other end of the first liquid inlet pipeline is communicated with the containing cavity. One end of the liquid outlet pipeline is communicated with the immersed pump, the other end of the liquid outlet pipeline is used for being communicated with external liquefied gas using equipment, and the liquid outlet pipeline is partially embedded in the first liquid inlet pipeline. The tank body is directly connected with the immersed pump pool, the tank body and the immersed pump do not need to be connected through an external pipeline, the pipeline construction amount is reduced, and the pipeline cost is reduced. And the liquid outlet pipeline is partially embedded in the first liquid inlet pipeline, so that the arrangement space of the immersed pump pool pipeline can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of cryogenic containers, and particularly relates to a submersible pump pool and a liquefied storage tank device. Background Art

[0002] A liquefied natural gas filling station is a station for filling liquefied natural gas into vehicles fueled by liquefied natural gas. The liquefied natural gas filling station includes a liquefied natural gas storage tank and a submersible pump skid.

[0003] Currently, the standard construction method of a liquefied natural gas filling station is as follows: after the liquefied natural gas storage tank and the submersible pump skid are respectively produced as separate process skids in the factory, they are transported to the project site, then the process skids are connected by pipelines on site, and then the pipelines between the process skids are insulated, and finally the function of the liquefied natural gas filling station is realized. However, this method results in a large amount of pipeline construction between the liquefied natural gas storage tank and the submersible pump skid, and the pipeline cost is relatively high. Summary of the Invention

[0004] An object of the utility model is to solve the technical problem in the prior art that the liquefied storage tank and the submersible pump skid are respectively used as separate process skids, resulting in a large amount of pipeline construction between the liquefied storage tank and the submersible pump skid and a relatively high pipeline cost.

[0005] To solve the above technical problem, the utility model adopts the following technical solutions:

[0006] A liquefied storage tank device, comprising:

[0007] A tank body for storing liquefied gas, and the tank body is provided with a liquid outlet;

[0008] A submersible pump pool is arranged outside the tank body, the submersible pump pool has an accommodation cavity, and a submersible pump is arranged in the accommodation cavity;

[0009] A first liquid inlet pipeline is arranged on the submersible pump pool, one end of the first liquid inlet pipeline is communicated with the liquid outlet, and the other end is communicated with the accommodation cavity; and

[0010] A liquid outlet pipeline, one end of the liquid outlet pipeline is communicated with the submersible pump, and the other end is used for communicating with an external liquefied gas using device, and a part of the liquid outlet pipeline is embedded in the first liquid inlet pipeline.

[0011] In one embodiment, the tank body includes an inner tank, an outer shell and a hollow connecting piece. A vacuum interlayer is arranged between the inner tank and the outer shell. The inner tank is provided with a first through hole, the outer shell is provided with a second through hole, and the hollow connecting piece is hermetically connected between the first through hole and the second through hole to isolate the vacuum interlayer from the inner cavity of the inner tank. The hollow part of the hollow connecting piece forms the liquid outlet.

[0012] In one embodiment, one end of the first liquid inlet pipe away from the liquid outlet extends into the accommodating cavity and is provided with a connecting portion, and the connecting portion is detachably connected to the submerged pump.

[0013] In one embodiment, a first opening is formed in a portion of the first liquid inlet pipe extending into the accommodating cavity, so that the liquefied gas in the tank can flow into the accommodating cavity through the first liquid inlet pipe; and / or

[0014] One end of the liquid outlet pipe penetrates through the connecting portion and is communicated with the submerged pump.

[0015] In one embodiment, the first opening has a first preset distance from the inner side wall of the top of the accommodating cavity; and / or

[0016] A second opening is formed at one end of the liquid outlet pipe penetrating through the connecting portion, and the second opening has a second preset distance from the inner side wall of the top of the accommodating cavity.

[0017] In one embodiment, the liquid outlet pipe includes a first pipe section and a second pipe section connected to each other. The first pipe section is embedded in the first liquid inlet pipe, and one end of the first pipe section away from the second pipe section is communicated with the accommodating cavity, and the second pipe section penetrates through the side wall of the first liquid inlet pipe.

[0018] In one embodiment, the liquefied storage tank device further includes a second liquid inlet pipe. One end of the second liquid inlet pipe is communicated with the accommodating cavity, and the other end is used for connecting an external liquefied gas storage device.

[0019] In one embodiment, the liquefied storage tank device further includes a valve and an exhaust pipeline. The valve is arranged on the first liquid inlet pipe, and the valve is used to control the on-off of the first liquid inlet pipe. The exhaust pipeline is communicated with the accommodating cavity. When the valve closes the liquid inlet pipe, the exhaust pipeline can discharge the gas in the accommodating cavity.

[0020] In one embodiment, the liquefied storage tank device further includes a heat insulation layer, and the heat insulation layer is arranged on the outer periphery of the first liquid inlet pipe.

[0021] In one embodiment, the liquefied storage tank device further includes a sewage discharge pipe, and the sewage discharge pipe is communicated with the accommodating cavity, and the sewage discharge pipe is used to discharge the impurities in the accommodating cavity.

[0022] In one embodiment, the first liquid inlet pipe is arranged on the top of the submerged pump pool. In one embodiment, the liquid outlet pipe is arranged on the top of the submerged pump pool; or

[0023] The liquid outlet pipe is arranged on the side wall of the submersible pump pool.

[0024] In one embodiment, the submersible pump pool, the first liquid inlet pipe and the liquid outlet pipe are provided in plurality. A plurality of the submersible pump pools are arranged outside the tank body, and a plurality of the first liquid inlet pipes and a plurality of the liquid outlet pipes are correspondingly arranged in a one-to-one manner in a plurality of the submersible pump pools.

[0025] In one embodiment, the submersible pump pool is arranged at the bottom of the tank body.

[0026] The present utility model further provides a submersible pump pool, comprising:

[0027] A main body having a receiving cavity therein, and a submersible pump is arranged in the receiving cavity;

[0028] A first liquid inlet pipe arranged on the main body, one end of the first liquid inlet pipe is communicated with the liquid outlet, and the other end is communicated with the receiving cavity; and

[0029] A liquid outlet pipe, one end of the liquid outlet pipe is communicated with the submersible pump, and the other end is used for communicating with an external liquefied gas using device, and a part of the liquid outlet pipe is embedded in the first liquid inlet pipe.

[0030] It can be seen from the above technical solutions that the present utility model has at least the following advantages and positive effects:

[0031] In the present utility model, the submersible pump pool is arranged outside the tank body. The tank body is used for storing liquefied gas, and the tank body is provided with a liquid outlet. The submersible pump pool has a receiving cavity, and a submersible pump is arranged in the receiving cavity. One end of the first liquid inlet pipe is communicated with the liquid outlet, and the other end is communicated with the receiving cavity. The liquefied gas in the tank body can directly flow into the submersible pump pool through the liquid outlet and the first liquid inlet pipe and be received in the tank body and the receiving cavity. That is, the tank body is directly connected to the submersible pump pool, without connecting the tank body and the submersible pump through an external pipeline, reducing the pipeline construction amount and lowering the pipeline cost. Moreover, a part of the liquid outlet pipe is embedded in the first liquid inlet pipe, which can save the installation space of the pipelines in the submersible pump pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of a liquefied storage tank device in an embodiment of the present utility model.

[0033] Figure 2 is Figure 1 an enlarged view of part A in

[0034] Figure 3 is a schematic structural diagram of a liquefied storage tank device from another perspective in an embodiment of the present utility model.

[0035] Figure 4 It is a schematic structural diagram of a submersible pump pool in an embodiment of the present utility model.

[0036] Figure 5 It is Figure 4 a cross-sectional view taken along line B-B in

[0037] Figure 6 It is Figure 5 an enlarged view of part C in

[0038] Figure 7 It is a schematic structural diagram of a first liquid inlet pipeline and a liquid outlet pipeline in an embodiment of the present utility model.

[0039] The reference numerals are explained as follows:

[0040] 100, tank body; 120, liquid outlet; 130, inner tank; 140, outer shell; 150, hollow connecting piece; 160, support structure; 170, vacuum interlayer;

[0041] 200, submersible pump pool; 210, accommodating cavity; 220, submersible pump; 230, connecting piece; 231, first flange; 232, second flange;

[0042] 300, first liquid inlet pipeline; 310, connecting part; 311, mounting hole; 320, first opening; 330, heat insulation layer;

[0043] 400, liquid outlet pipeline; 410, second opening; 420, first pipe section; 430, second pipe section; 440, second heat insulation layer;

[0044] 500, second liquid inlet pipeline; 510, third heat insulation layer;

[0045] 600, exhaust pipeline; 610, fourth heat insulation layer;

[0046] 700, valve;

[0047] 800, sewage discharge pipeline. Detailed implementation manners

[0048] Typical implementation manners reflecting the features and advantages of the present utility model will be described in detail in the following description. It should be understood that the present utility model can have various changes in different implementation manners, all of which do not depart from the scope of the present utility model, and the descriptions and illustrations therein are essentially for illustrative purposes and not for limiting the present utility model.

[0049] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0050] In an embodiment of the present utility model, a liquefied storage tank device is provided, and this liquefied storage tank device is applied in a gas filling station for liquefied gas.

[0051] In one embodiment, as Figure 1 and Figure 2 shown, a liquefied storage tank device includes a tank body 100. The tank body 100 is used for storing liquefied gas. The tank body 100 is specifically used for storing liquefied natural gas. The tank body 100 can be a vertical tank body.

[0052] Specifically, please refer to Figure 3 , the tank body 100 is provided with a liquid outlet 120. The liquefied gas in the tank body 100 flows out of the tank body 100 through the liquid outlet 120. The liquid outlet 120 can be arranged at the bottom of the tank body 100, which is convenient for the liquefied gas in the tank body 100 to flow out of the tank body 100, and can also make all the liquefied gas in the tank body 100 flow out of the tank body 100, reducing the residual liquefied gas inside the tank body 100.

[0053] Specifically, the liquid outlet 120 can be a circular through hole to facilitate the connection of the liquid outlet 120 with a circular pipeline.

[0054] It should be noted that the boiling point of liquefied gas is very low. For example, the boiling point of liquefied natural gas is -161.25 °C. Liquefied natural gas is a cryogenic medium. The tank body should have reliable cryogenic resistance performance and excellent cold insulation performance. The tank body should at least meet the requirement of withstanding low temperature below -162 °C.

[0055] In this embodiment, please refer to Figure 3, the tank body 100 includes an inner tank 130 and an outer shell 140. The inner tank 130 is disposed inside the outer shell 140. A vacuum interlayer 170 is provided between the inner tank 130 and the outer shell 140. The vacuum interlayer 170 can have a good heat preservation effect on the liquefied gas inside the inner tank 130, reduce the heat exchange between the low temperature inside the inner tank 130 and the outside, and keep the liquefied gas in a low temperature state. Specifically, the vacuum interlayer 170 can be filled with cold insulation material to further improve the cold insulation effect on the liquefied gas.

[0056] In one embodiment, please refer to Figure 3 , the tank body 100 further includes a hollow connecting member 150. The hollow connecting member 150 can be cylindrical. The hollow connecting member 150 can be a pipe structure. The inner tank 130 is provided with a first through hole. The first through hole can be a circular through hole to adapt to the cylindrical hollow connecting member 150. The outer shell 140 is provided with a second through hole. The second through hole can be a circular through hole to adapt to the cylindrical hollow connecting member 150. The hollow connecting member 150 is hermetically connected between the first through hole and the second through hole to isolate the vacuum interlayer 170 from the inner cavity of the inner tank 130. The hollow part of the hollow connecting member 150 forms a liquid outlet 120.

[0057] Specifically, one end of the hollow connecting member 150 away from the inner tank 130 protrudes from the surface of the outer shell 140 to facilitate the connection of the hollow connecting member 150 with external equipment.

[0058] Specifically, please refer to Figure 1 and Figure 2 , the bottom of the tank body 100 is provided with a support structure 160. The support structure 160 includes three support members. The three support members are equidistantly arranged at the bottom of the tank body 100. The three support members form a structure similar to a tripod to improve the support stability of the tank body 100.

[0059] In one embodiment, please refer to Figure 1 and Figure 2 , a liquefied storage tank device further includes a submersible pump pool 200. The submersible pump pool 200 is disposed outside the tank body 100. The submersible pump pool 200 can be specifically disposed at the bottom of the tank body 100.

[0060] Specifically, the submersible pump pool 200 can be disposed below the tank body 100 to facilitate the flow of the liquefied gas in the tank body 100 into the submersible pump pool 200. The submersible pump pool 200 is located within the three support members, which can save the space layout of the entire liquefied storage tank. The submersible pump pool 200 can be arranged in the vertical direction, and the liquefied gas at the bottom of the tank body 100 directly flows into the submersible pump pool 200 under the action of its own weight.

[0061] In one embodiment, please refer to Figure 3, there is a receiving cavity 210 inside the submersible pump pool 200. The receiving cavity 210 is communicated with the inside of the tank body 100. Specifically, the receiving cavity 210 is communicated with the inner cavity of the inner tank 130. Both the receiving cavity 210 and the inner cavity of the inner tank 130 are used to hold liquefied gas. A submersible pump 220 is arranged in the receiving cavity 210. In other embodiments, the submersible pump pool 200 includes a main body. The main body constitutes the outer shell of the submersible pump pool 200. A receiving cavity is arranged inside the main body.

[0062] Among them, the submersible pump 220 is arranged in the vertical direction.

[0063] In one embodiment, multiple submersible pump pools 200 can be provided. Multiple submersible pumps 220 are arranged in the multiple submersible pump pools 200. The multiple submersible pumps 220 are used to pump the liquefied gas in the tank body 100 to improve the output efficiency of the liquefied gas in the tank body 100.

[0064] In one embodiment, the liquefied storage tank device further includes a first liquid inlet pipeline 300. The first liquid inlet pipeline 300 can be a circular pipeline. The first liquid inlet pipeline 300 is arranged on the submersible pump pool 200. That is, the first liquid inlet pipeline 300 is a part of the structure of the submersible pump pool 200. Specifically, the first liquid inlet pipeline 300 can be arranged on the top of the submersible pump pool 200.

[0065] Specifically, as Figure 4 shown, the submersible pump pool 200 further includes a connecting piece 230. The first liquid inlet pipeline 300 is arranged on the connecting piece 230. The submersible pump pool 200 can be a structure with an opening at one end. The connecting piece 230 is detachably connected to the submersible pump pool 200 and seals the opening. With such a setting, it is convenient to install and disassemble the submersible pump 220 in the receiving cavity 210. When the submersible pump 220 is damaged or fails, the connecting piece 230 can be opened to take out the submersible pump 220 for repair or replacement.

[0066] Specifically, the connecting piece 230 includes a first flange 231 and a second flange 232. The first flange 231 is connected to the first liquid inlet pipeline 300. The second flange 232 is connected to the submersible pump pool 200. The first flange 231 and the second flange 232 are detachably connected. The first flange 231 and the second flange 232 can specifically be bolt-connected or screw-connected. From the Figure 5 attached perspective, the first flange 231 can be the upper flange. The second flange 232 can be the lower flange.

[0067] In one embodiment, please refer to Figure 3, one end of the first liquid inlet pipe 300 is communicated with the liquid outlet 120, and the other end is communicated with the accommodating cavity 210. The liquefied gas in the tank body 100 flows into the accommodating cavity 210 of the submersible pump pool 200 after passing through the liquid outlet 120 and the first liquid inlet pipe 300. In the working state, the liquefied gas is accommodated in the accommodating cavity 210 of the tank body 100, the first liquid inlet pipe 300 and the submersible pump pool 200.

[0068] Specifically, one end of the first liquid inlet pipe 300 away from the liquid outlet 120 extends into the accommodating cavity 210 and is provided with a connecting portion 310. The connecting portion 310 is detachably connected to the submersible pump 220. That is, the first liquid inlet pipe 300 and the submersible pump 220 are detachably connected. A plurality of mounting holes 311 are formed in the connecting portion 310. A plurality of fasteners pass through the submersible pump 220 and the plurality of mounting holes 311 to fixedly mount the first liquid inlet pipe 300 and the submersible pump 220. Among them, the connecting portion 310 can be a flange structure.

[0069] Specifically, please refer to Figure 7 , a first opening 320 is formed in a part of the first liquid inlet pipe 300 extending into the accommodating cavity 210, so that the liquefied gas in the tank body 100 can flow into the accommodating cavity 210 through the first liquid inlet pipe 300.

[0070] More specifically, the first opening 320 can be set to two. The two first openings 320 are arranged oppositely, so that the liquefied gas in the tank body 100 can flow into the accommodating cavity 210 in two directions, and it can ensure that the liquefied gas in the tank body 100 is fully supplied to the accommodating cavity 210.

[0071] It should be noted that when the liquefied gas in the tank body 100 passes through the first opening 320 and contacts the inner side wall of the top of the accommodating cavity 210, the liquefied gas will exchange heat with the inner side wall of the top of the accommodating cavity 210, so that the temperature of the liquefied gas rises, and part of the liquefied gas will vaporize. In this embodiment, the first opening 320 and the inner side wall of the top of the accommodating cavity 210 have a first preset distance L1, as Figure 6 shown. With such a setting, when the liquefied gas in the tank body 100 passes through the first opening 320, it is avoided that the liquefied gas contacts the inner side wall of the top of the accommodating cavity 210 for heat exchange, thereby reducing the vaporization of the liquefied gas. In addition, after the liquid in the accommodating cavity 210 vaporizes, it accumulates in the top space of the accommodating cavity 210, and the gas in the top space can reduce the contact between the liquefied gas in the accommodating cavity 210 and the inner side wall of the top of the accommodating cavity 210, so as to reduce the vaporization of the liquefied gas in the accommodating cavity 210.

[0072] Among them, the inner side wall of the top of the accommodating cavity 210 can be the bottom of the connecting member 230. Specifically, the inner side wall of the top of the accommodating cavity 210 can be the bottom of the first flange 231. Specifically, the first preset distance can be 10 to 100 millimeters.

[0073] Specifically, the liquefied storage tank device further includes a heat insulation layer 330. The heat insulation layer 330 is disposed on the outer periphery of the first liquid inlet pipe 300 to reduce the gasification of the liquefied gas in the first liquid inlet pipe 300. For the convenience of distinction, the heat insulation layer on the outer periphery of the first liquid inlet pipe 300 is referred to as the first heat insulation layer. The first heat insulation layer may be a vacuum sleeve structure. The vacuum sleeve is sleeved on the outer periphery of the first liquid inlet pipe 300.

[0074] In one embodiment, please refer to Figure 7 for reference. The liquefied storage tank device further includes a liquid outlet pipe 400. The liquid outlet pipe 400 may be a circular pipe. One end of the liquid outlet pipe 400 is communicated with the submersible pump 220, and the other end is used to communicate with an external liquefied gas using device. The submersible pump 220 pumps the liquefied gas in the submersible pump pool 200 and flows through the liquid outlet pipe 400 to the external liquefied gas using device. Specifically, the liquid outlet pipe 400 may be disposed on the top of the submersible pump pool 200. In other embodiments, the liquid outlet pipe 400 may also be disposed on the side wall of the submersible pump pool 200.

[0075] Specifically, the caliber of the liquid outlet pipe 400 may be smaller than that of the first liquid inlet pipe 300. A part of the liquid outlet pipe 400 is embedded in the first liquid inlet pipe 300. Such a setting can save the pipeline setting space of the submersible pump pool 200, and there is no need to additionally set the running path of the liquid outlet pipe 400 on the submersible pump pool 200, which can save the manufacturing cost of the submersible pump pool 200.

[0076] More specifically, one end of the liquid outlet pipe 400 penetrates through the connecting portion 310 and is communicated with the submersible pump 220. A second opening 410 is formed at one end of the liquid outlet pipe 400 that penetrates through the connecting portion 310. The second opening 410 is communicated with the submersible pump 220, and the liquefied gas pumped by the submersible pump 220 enters the liquid outlet pipe 400 through the second opening 410. Specifically, the second opening 410 may be disposed on the top of the submersible pump pool 200 or at other positions on the cylinder body of the submersible pump pool 200. Among them, the second opening 410 may be a circular opening.

[0077] It should be noted that when the liquefied gas of the submersible pump 220 passes through the second opening 410 and the liquefied gas contacts the inner side wall of the top of the accommodating cavity 210, the liquefied gas will exchange heat with the inner side wall of the top of the accommodating cavity 210, so that the temperature of the liquefied gas rises and part of the liquefied gas will be gasified. In this embodiment, the second opening 410 and the inner side wall of the top of the accommodating cavity 210 have a second preset distance L2, as Figure 6 shown. Specifically, the second preset distance may be 10 to 100 millimeters.

[0078] Specifically, please refer to Figure 5, the liquid outlet pipe 400 includes a connected first pipe segment 420 and a second pipe segment 430. The first pipe segment 420 is embedded in the first liquid inlet pipe 300, and one end of the first pipe segment 420 away from the second pipe segment 430 communicates with the accommodation cavity 210. The second pipe segment 430 penetrates through the side wall of the first liquid inlet pipe 300. As Figure 5 shown, the first pipe segment 420 is arranged in the vertical direction. The second pipe segment 430 is arranged in the horizontal direction. The second pipe segment 430 extends outside the first liquid inlet pipe 300. The first pipe segment 420 is embedded inside the first liquid inlet pipe 300, and a cold insulation structure is arranged on the outer periphery of the first liquid inlet pipe 300. Therefore, there is no need to set a cold insulation structure for the first pipe segment 420 again. A second heat insulation layer 440 is arranged on the outer periphery of the second pipe segment 430. The second heat insulation layer 440 can be a vacuum sleeve structure.

[0079] During operation, the liquefied gas in the tank body 100 can directly flow into the submersible pump pool 200 through the liquid outlet 120 and the first liquid inlet pipe 300, and is accommodated in the tank body 100 and the accommodation cavity 210. That is, the tank body 100 is directly connected to the submersible pump pool 200, and there is no need to connect the tank body 100 and the submersible pump 220 through an external pipeline, reducing the pipeline construction volume, shortening the on-site construction period, and reducing the pipeline cost. The tank body 100 is directly connected to the submersible pump pool 200, which can improve the integration degree of the entire liquefied storage tank device, reduce the floor area of the liquefied storage tank device, and reduce the land use cost of the gas gathering station. In addition, a part of the liquid outlet pipe 400 is embedded in the first liquid inlet pipe 300, which can further save the pipeline installation space of the submersible pump pool 200, thereby reducing the occupied space of the submersible pump pool 200.

[0080] In the related art, the storage tank and the submersible pump pool are connected by pipelines. The external pipelines are long and the path is curved. The gas in the submersible pump pool cannot flow to the tank body through the external pipelines, and an exhaust structure needs to be set to discharge the gas in the submersible pump pool.

[0081] In this embodiment, the liquid outlet 120 of the tank body 100 is directly communicated with the first liquid inlet pipe 300 on the submersible pump pool 200. The first liquid inlet pipe 300 is a part of the structure of the submersible pump pool 200. When the liquefied natural gas in the submersible pump pool 200 is vaporized, the density of the natural gas is small, and the natural gas will flow upward through the internal first liquid inlet pipe 300 into the tank body 100, and there is a structure for re-liquefying the low-temperature natural gas in the tank body 100. The liquefied storage tank device with only the first liquid inlet pipe 300 can not set an exhaust pipeline, which can greatly save the pipeline cost, reduce the cold leakage points of the pipeline, and the gasification phenomenon of the liquefied gas in the pipeline.

[0082] In one embodiment, please refer to Figure 3 and Figure 5, the liquefied storage tank device further includes a second liquid inlet pipe 500. The second liquid inlet pipe 500 can be a circular pipe. One end of the second liquid inlet pipe 500 communicates with the accommodating cavity 210, and the other end is used to connect to an external liquefied gas storage device. It can be understood that the submersible pump 220 can pump the liquefied gas in the tank body 100 or the liquefied gas of an external liquefied gas storage tank device. The external liquefied gas storage tank device can be a tank truck.

[0083] Specifically, the second liquid inlet pipe 500 is connected to the side wall of the submersible pump pool 200. That is, the second liquid inlet pipe 500 penetrates through the side wall of the submersible pump pool 200 and communicates with the accommodating cavity 210.

[0084] More specifically, a third heat insulation layer 510 is provided on the outer periphery of the second liquid inlet pipe 500. The third heat insulation layer 510 can be a vacuum sleeve structure.

[0085] In one embodiment, the liquefied storage tank device further includes an exhaust pipeline 600. The exhaust pipeline 600 can be a circular pipe. The exhaust pipeline 600 communicates with the accommodating cavity 210. The exhaust pipeline 600 can be connected to the side wall of the submersible pump pool 200. That is, the exhaust pipeline 600 penetrates through the side wall of the submersible pump pool 200 and communicates with the accommodating cavity 210.

[0086] It should be noted that the exhaust pipeline 600 can discharge the gas in the accommodating cavity 210. When the submersible pump 220 pumps the liquefied gas, part of the liquefied gas will vaporize. The more serious the vaporization, the more gas there is in the submersible pump pool 200, which will increase the air pressure in the accommodating cavity 210, thus affecting the normal operation of the submersible pump 220. In addition, the gas generated by vaporization will cavitate the submersible pump 220. In this embodiment, the exhaust pipeline 600 can discharge the gas in the accommodating cavity 210, reduce the air pressure in the accommodating cavity 210, ensure the normal operation of the submersible pump 220, and at the same time avoid the submersible pump 220 from being cavitated and improve the output effect of the submersible pump 220.

[0087] Specifically, a fourth heat insulation layer 610 is provided on the outer periphery of the exhaust pipeline 600. The fourth heat insulation layer 610 can be a vacuum sleeve structure.

[0088] In one embodiment, please refer to Figure 3 , the liquefied storage tank device further includes a valve 700. The valve 700 is arranged on the first liquid inlet pipe 300. Specifically, the valve 700 is detachably arranged on the first liquid inlet pipe 300. The valve 700 is used to control the on-off of the first liquid inlet pipe 300. When the valve 700 is opened, the liquefied gas in the tank body 100 enters the accommodating cavity 210 in the submersible pump pool 200 through the first liquid inlet pipe 300. When the valve 700 is closed, the tank body 100 is isolated from the submersible pump pool 200.

[0089] In other embodiments, the valve 700 may also be disposed at the liquid outlet 120. The valve 700 is used to control the on / off of the liquid outlet 120. Alternatively, the valve 700 is disposed between the first liquid inlet pipe 300 and the liquid outlet 120. The valve 700 may be a cryogenic pneumatic ball valve.

[0090] It should be noted that the first liquid inlet pipe 300 and the second liquid inlet pipe 500 are generally not opened simultaneously. When the second liquid inlet pipe 500 is opened, the valve 700 needs to be closed, and then the first liquid inlet pipe 300 is closed. After the first liquid inlet pipe 300 is closed, the gas in the accommodation cavity 210 cannot flow into the tank body 100, and an additional exhaust pipeline 600 needs to be provided to discharge the gas in the accommodation cavity 210. Therefore, the cooperation of the valve 700 and the second liquid inlet pipe 500 can effectively ensure the normal operation of the submersible pump 220.

[0091] Please refer to Figure 4 and Figure 5 , in one embodiment, the liquefied storage tank device further includes a sewage discharge pipeline 800. The sewage discharge pipeline 800 may be a circular pipeline. The sewage discharge pipeline is communicated with the accommodation cavity 210. The sewage discharge pipeline 800 is used to discharge impurities in the accommodation cavity 210.

[0092] Specifically, the sewage discharge pipeline 800 may be connected to the side wall of the submersible pump pool 200. That is, the sewage discharge pipeline 800 penetrates through the side wall of the submersible pump pool 200 and is communicated with the accommodation cavity 210.

[0093] More specifically, the sewage discharge pipeline 800 may be disposed at a position close to the exhaust pipeline 600. The sewage discharge pipeline 800 may share a heat insulation layer with the exhaust pipeline 600. That is, the fourth heat insulation layer 610 may be wrapped around the outer periphery of the sewage discharge pipeline 800 and the exhaust pipeline 600, thereby further simplifying the structure of the submersible pump pool 200.

[0094] Although the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are descriptive and exemplary, rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be broadly construed within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A liquefied storage tank device, characterized in that, Comprising: A tank body for storing liquefied gas, and the tank body is provided with a liquid outlet. A submersible pump pool is arranged outside the tank body. The submersible pump pool has a receiving cavity, and a submersible pump is arranged in the receiving cavity. A first liquid inlet pipeline is arranged on the submersible pump pool. One end of the first liquid inlet pipeline is communicated with the liquid outlet, and the other end is communicated with the receiving cavity; and A liquid outlet pipeline, one end of the liquid outlet pipeline is communicated with the submersible pump, and the other end is used for communicating with an external liquefied gas using device. The liquid outlet pipeline is partially embedded in the first liquid inlet pipeline.

2. The liquefied storage tank device according to claim 1, characterized in that, The tank body includes an inner tank, an outer shell and a hollow connecting member. A vacuum interlayer is arranged between the inner tank and the outer shell. The inner tank is provided with a first through hole, and the outer shell is provided with a second through hole. The hollow connecting member is hermetically connected between the first through hole and the second through hole to isolate the vacuum interlayer from the inner cavity of the inner tank. The hollow part of the hollow connecting member forms the liquid outlet.

3. The liquefied storage tank device according to claim 1, wherein One end of the first liquid inlet pipeline far from the liquid outlet extends into the receiving cavity and is provided with a connecting portion, and the connecting portion is detachably connected to the submersible pump.

4. The liquefied storage tank device according to claim 3, characterized in that, A first opening is arranged on the part of the first liquid inlet pipeline extending into the receiving cavity, so that the liquefied gas in the tank body can flow into the receiving cavity through the first liquid inlet pipeline; and / or One end of the liquid outlet pipeline penetrates through the connecting portion and is communicated with the submersible pump.

5. The liquefied storage tank device according to claim 4, characterized in that, The first opening has a first preset distance from the inner side wall of the top of the receiving cavity; and / or A second opening is arranged at one end of the liquid outlet pipeline penetrating through the connecting portion, and the second opening has a second preset distance from the inner side wall of the top of the receiving cavity.

6. The liquefied storage tank device according to claim 1, wherein The liquid outlet pipeline includes a first pipe section and a second pipe section connected to each other. The first pipe section is embedded in the first liquid inlet pipeline, and one end of the first pipe section far from the second pipe section is communicated with the receiving cavity. The second pipe section penetrates through the side wall of the first liquid inlet pipeline.

7. The liquefied storage tank device according to claim 1, characterized in that, The liquefied storage tank device further includes a second liquid inlet pipeline. One end of the second liquid inlet pipeline is communicated with the receiving cavity, and the other end is used for connecting an external liquefied gas storage device.

8. The liquefied storage tank device according to claim 1, characterized in that, The liquefied storage tank device further includes a valve and an exhaust pipeline. The valve is arranged on the first liquid inlet pipeline, and the valve is used to control the on-off of the first liquid inlet pipeline. The exhaust pipeline is communicated with the receiving cavity. When the valve closes the liquid inlet pipeline, the exhaust pipeline can discharge the gas in the receiving cavity.

9. The liquefied storage tank device according to claim 1, characterized in that, The liquefied storage tank device further includes a heat insulation layer arranged on the outer circumference of the first liquid inlet pipeline.

10. The liquefied storage tank device according to claim 1, wherein The liquefied storage tank device further includes a sewage discharge pipeline communicated with the receiving cavity, and the sewage discharge pipeline is used to discharge impurities in the receiving cavity.

11. The liquefied storage tank device according to claim 1, characterized in that, The first liquid inlet pipeline is arranged on the top of the submersible pump pool.

12. The liquefied storage tank device according to claim 1, characterized in that, The liquid outlet pipeline is arranged on the top of the submersible pump pool; or The liquid outlet pipeline is arranged on the side wall of the submersible pump pool.

13. The liquefied storage tank device according to claim 1, wherein, The submersible pump pools, the first liquid inlet pipelines, and the liquid outlet pipelines are provided in multiple numbers. The multiple submersible pump pools are arranged outside the tank body, and the multiple first liquid inlet pipelines and the multiple liquid outlet pipelines are correspondingly arranged in the multiple submersible pump pools.

14. The liquefied storage tank device according to claim 1, characterized in that, The submersible pump pool is arranged at the bottom of the tank body.

15. A submersible pump pool, characterized in that, It includes: A main body, within which there is an accommodation cavity, and a submersible pump is arranged in the accommodation cavity; A first liquid inlet pipeline, which is arranged on the main body. One end of the first liquid inlet pipeline is communicated with the liquid outlet of the tank body of the liquefied storage tank device, and the other end is communicated with the accommodation cavity; and A liquid outlet pipeline, one end of which is communicated with the submersible pump, and the other end is used to communicate with external liquefied gas using equipment. The liquid outlet pipeline is partially embedded in the first liquid inlet pipeline.

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