Pump storage tank device of gas station

Abstract

The utility model provides a storage tank device with a pump for a gas station. The storage tank device comprises a tank body and an immersed pump, a first containing cavity is formed in the tank body, the first containing cavity is used for containing liquefied gas, a containing cavity body is formed in the tank body, the containing cavity body and the tank body are of an integrated connection structure, a second containing cavity is formed in the containing cavity body, and the second containing cavity is communicated with the first containing cavity. The immersed pump is arranged in the second containing cavity, the immersed pump is provided with a liquid inlet and a liquid outlet pipeline, the liquid inlet is used for allowing liquefied gas in the second containing cavity to enter the immersed pump, and the liquid outlet pipeline is used for being communicated with external liquefied gas using equipment. According to the storage tank device with the pump, the tank body and the immersed pump do not need to be connected through an external pipeline and a valve, and the pipeline construction amount and the pipeline heat preservation work amount can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature containers, in particular to a storage tank device with a pump for a gas filling station. Background Art

[0002] A liquefied natural gas filling station is a station where vehicles fueled by liquefied natural gas are filled with liquefied natural gas. The main equipment of a liquefied natural gas filling station is divided into three parts: liquefied natural gas storage tanks, submersible pump skids, and liquid filling machines.

[0003] At present, the construction method of LNG filling stations is: LNG storage tanks, submersible pump skids, and liquid filling machines are produced as separate process skids in the factory and then transported to the project site. Then, the three major process skids are connected with pipes, valves and other components, and the pipelines between the process skids are insulated. This method requires a large amount of pipeline construction, which increases the amount of pipeline insulation engineering, and the cost of pipelines and valves is also high. Summary of the invention

[0004] One purpose of the utility model is to solve the technical problems in the prior art that the pipeline construction between the liquefied natural gas storage tank and the submersible pump skid is large, resulting in a large amount of insulation work and high costs for pipelines and valves.

[0005] The utility model provides a storage tank device with a pump for a gas filling station, comprising:

[0006] A tank body, wherein a first accommodating chamber is provided in the tank body, the first accommodating chamber is used to accommodate liquefied gas, the tank body is provided with an accommodating chamber, the accommodating chamber and the tank body are an integrally connected structure, a second accommodating chamber is provided in the accommodating chamber, and the second accommodating chamber is communicated with the first accommodating chamber; and

[0007] A submersible pump is arranged in the second accommodating chamber, and the submersible pump is provided with a liquid inlet and a liquid outlet pipe. The liquid inlet is used to supply the liquefied gas in the second accommodating chamber to enter the submersible pump, and the liquid outlet pipe is used to connect to external liquefied gas using equipment.

[0008] In one embodiment, the tank body includes a first inner liner and a first outer shell, the first accommodating cavity is disposed in the first inner liner, and a first vacuum interlayer is disposed between the first inner liner and the first outer shell;

[0009] The accommodating cavity comprises a second inner liner and a second outer shell, the second accommodating cavity is arranged in the second inner liner, and a second vacuum interlayer is arranged between the second inner liner and the second outer shell;

[0010] The first inner liner and the second inner liner are an integrally connected structure, the first outer shell and the second outer shell are an integrally connected structure, and the first vacuum interlayer and the second vacuum interlayer are in communication.

[0011] In one embodiment, the connection between the first inner container and the second inner container is formed as a connecting cylinder, and the radial dimension of the connecting cylinder close to one end of the first inner container is smaller than the radial dimension close to one end of the second inner container.

[0012] In one embodiment, the storage tank device with pump further includes a reinforcing member, which is respectively connected to the first inner liner and the second inner liner, and the reinforcing member is located at the periphery of the connecting cylinder.

[0013] In one embodiment, the reinforcing member is a sleeve, and the sleeve is sleeved on the connecting cylinder; or

[0014] The reinforcement member is a reinforcement plate, and the reinforcement plate is connected to the first inner liner, the connecting cylinder and the second inner liner.

[0015] In one embodiment, the accommodating cavity further comprises a cover assembly, and an end of the second liner away from the first liner has an opening; the cover assembly is detachably connected to an end of the second liner away from the first liner, the cover assembly is detachably connected to an end of the second outer shell away from the first outer shell, and the cover assembly seals the opening and the second vacuum interlayer.

[0016] In one of the embodiments, the tank device with pump further includes a thermal insulation layer, and the thermal insulation layer is disposed on the periphery of the cover assembly.

[0017] In one embodiment, the cover assembly includes a first cover and a second cover, the first cover is connected to an end of the second inner liner away from the first inner liner and an end of the second outer shell away from the first outer shell, and seals the second vacuum interlayer, and the second cover is detachably connected to the first cover and seals the opening.

[0018] In one of the embodiments, the tank device with pump further includes a heat insulation layer, and the heat insulation layer is disposed on a side of the second cover body facing the submersible pump.

[0019] In one embodiment, the tank device with pump further includes a sealing gasket, and the sealing gasket is disposed between the first cover body and the second cover body.

[0020] In one embodiment, the liquid outlet pipe passes through the second cover body and is connected to the submersible pump.

[0021] In one embodiment, the accommodating cavities are provided in plurality, the submersible pumps are provided in plurality, and the plurality of submersible pumps are correspondingly arranged in the second accommodating cavities of the plurality of accommodating cavities.

[0022] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0023] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0024] In the utility model, the tank body is provided with a containing cavity, and the containing cavity and the tank body are an integrally connected structure. The first containing cavity in the tank body is communicated with the second containing cavity in the containing cavity. The first containing cavity and the second containing cavity are both used to contain liquefied gas. A submersible pump is provided in the second containing cavity, and the submersible pump can extract the liquefied gas in the second containing cavity to the external liquefied gas using equipment. The utility model of the storage tank device with a pump does not require external pipelines and valves to connect between the tank body and the submersible pump, which can reduce the amount of pipeline construction and the amount of pipeline insulation engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a storage tank device with a pump in a gas filling station in an embodiment of the utility model.

[0026] Figure 2 It is a partial structural diagram of a storage tank device with a pump in a gas filling station in an embodiment of the utility model.

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0028] Figure 4 It is a partial structural diagram of a pump storage tank device provided with a reinforcement member in an embodiment of the utility model.

[0029] The following are the descriptions of the reference numerals:

[0030] 100, tank body; 110, first accommodating cavity; 120, first liner; 130, first outer shell; 140, first vacuum interlayer; 150, supporting structure;

[0031] 200, accommodating cavity; 210, second accommodating cavity; 220, second liner; 230, second outer shell; 240, second vacuum interlayer;

[0032] 300, submersible pump; 310, liquid inlet; 320, liquid outlet pipe; 321, vacuum sleeve;

[0033] 400, connecting cylinder; 410, first section; 420, second section;

[0034] 500, reinforcement;

[0035] 600, cover assembly; 610, thermal insulation layer; 620, first cover; 630, second cover; 631, thermal insulation layer; 640, sealing gasket. DETAILED DESCRIPTION

[0036] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0038] The utility model provides a storage tank device with a pump for a gas filling station. Figure 1 As shown, in one embodiment, a pump storage tank device of a gas filling station includes a tank body 100. The tank body 100 may be a vertical tank body.

[0039] Specifically, a first accommodating chamber 110 is provided in the tank body 100. The first accommodating chamber 110 is used to accommodate liquefied gas. The first accommodating chamber 110 can be specifically used to accommodate liquefied natural gas. 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 used as a low-temperature cryogenic medium. The tank body must have reliable low-temperature cryogenic resistance and excellent cold preservation performance. The tank body should at least meet the low-temperature resistance of below -162°C.

[0040] More specifically, if Figure 1As shown, the tank body 100 includes a first inner liner 120 and a first outer shell 130. The first inner liner 120 is arranged inside the first outer shell 130. The first accommodating chamber 110 is arranged in the first inner liner 120. A first vacuum interlayer 140 is arranged between the first inner liner 120 and the first outer shell 130. The first vacuum interlayer 140 can have a good insulation effect on the liquefied gas in the first accommodating chamber 110, reduce the heat exchange between the low-temperature liquefied gas in the first accommodating chamber 110 and the outside, so that the liquefied gas in the first accommodating chamber 110 is in a low-temperature state.

[0041] Specifically, the first vacuum interlayer 140 may be filled with a cold-keeping material to further enhance the cold-keeping effect of the liquefied gas in the first accommodating chamber 110 .

[0042] In one embodiment, a support structure 150 is disposed at the bottom of the tank body 100. The support structure 150 includes three support members. The three support members are disposed at equal intervals at the bottom of the tank body 100. The three support members form a tripod-like structure to improve the support stability of the tank body 100.

[0043] In one embodiment, if Figure 1 As shown, the tank body 100 is provided with a receiving cavity 200. The receiving cavity 200 may be an insulating air bag. The receiving cavity 200 may be in a strip shape. The receiving cavity 200 may be arranged in a vertical direction.

[0044] Specifically, the accommodating cavity 200 may be disposed outside the tank body 100. Specifically, the accommodating cavity 200 may be disposed at the bottom of the tank body 100.

[0045] More specifically, the accommodating chamber 200 can be disposed below the tank body 100 so that the liquefied gas in the first accommodating chamber 110 can flow into the second accommodating chamber 210. The accommodating chamber 200 is located in the supporting structure 150, which can save the space layout of the entire pump storage tank device. That is, the accommodating chamber 200 is located in the space surrounded by three supporting members.

[0046] In one embodiment, if Figure 2 As shown, a second accommodating chamber 210 is provided in the accommodating chamber body 200. The second accommodating chamber 210 is communicated with the first accommodating chamber 110. The liquefied gas in the first accommodating chamber 110 can flow into the second accommodating chamber 210, so that the liquefied gas is accommodated in the first accommodating chamber 110 and the second accommodating chamber 210. Specifically, the liquefied gas at the bottom of the first accommodating chamber 110 directly flows into the second accommodating chamber 210 under the action of its own weight.

[0047] In one embodiment, if Figure 2As shown, the accommodating cavity 200 includes a second liner 220 and a second outer shell 230. The second liner 220 is arranged inside the second outer shell 230. The second accommodating cavity 210 is arranged in the second liner 220. A second vacuum interlayer 240 is arranged between the second liner 220 and the second outer shell 230. The second vacuum interlayer 240 has a good heat preservation effect on the liquefied gas in the second accommodating cavity 210, reduces the heat exchange between the low-temperature gas in the second accommodating cavity 210 and the outside, and makes the liquefied gas in the second accommodating cavity 210 in a low-temperature state. Specifically, the second vacuum interlayer 240 can be filled with cold-insulating material to further enhance the cold-insulating effect of the liquefied gas in the second accommodating cavity 210.

[0048] In one embodiment, the first inner liner 120 and the second inner liner 220 are integrally connected. Specifically, the bottom of the first inner liner 120 and the top of the second inner liner 220 are integrally connected.

[0049] The first shell 130 and the second shell 230 are integrally connected. Specifically, the bottom of the first shell 130 is integrally connected to the top of the second shell 230. The first vacuum interlayer 140 and the second vacuum interlayer 240 are connected. That is, the first liner 120 and the second liner 220 can be welded to form an integral liner structure. The first shell 130 and the second shell 230 can be welded to form an integral shell structure. The liner structure is arranged inside the shell structure. There is a vacuum interlayer between the liner structure and the shell structure.

[0050] In one embodiment, the accommodating cavity 200 is an integrally connected structure with the tank body 100. The outer wall of the tank body 100 is convexly provided to extend the accommodating cavity 200. Specifically, the accommodating cavity 200 can be welded to the tank body 100.

[0051] like Figure 1 and Figure 2 In one embodiment, a storage tank device with a pump further includes a submersible pump 300. The submersible pump 300 is disposed in the second accommodation chamber 210. The submersible pump 300 is always in a lubricated and low-temperature environment of liquefied gas, which can eliminate the wear phenomenon of the pump bearing of the submersible pump 300 and the cavitation risk of the submersible pump 300, thereby making the output efficiency of the submersible pump 300 higher. Specifically, the submersible pump 300 is disposed in the second accommodation chamber 210 along the vertical direction.

[0052] In one embodiment, the submersible pump 300 and the accommodating chamber 200 can be provided in multiple numbers. The multiple submersible pumps 300 are provided in the second accommodating chamber 210 of the multiple accommodating chambers 200 in a one-to-one correspondence. The multiple submersible pumps 300 can simultaneously extract the liquefied gas in the first accommodating chamber 110 and the second accommodating chamber 210. Specifically, the multiple submersible pumps 300 have the same structure. The multiple accommodating chambers 200 have the same structure.

[0053] It should be noted that in the present application, the tank body 100 and the accommodating chamber 200 are an integrally connected structure. No external pipeline connection is required between the tank body 100 and the accommodating chamber 200. Therefore, a valve may not be provided between the tank body 100 and the accommodating chamber 200, which can save the cost of pipelines and valves. Since a valve may not be provided between the tank body 100 and the accommodating chamber 200, if only one submersible pump 300 and the accommodating chamber 200 are provided, when one submersible pump 300 fails and cannot operate normally, the tank body 100 and the accommodating chamber 200 cannot be disassembled, and the communication between the first accommodating chamber 110 and the second accommodating chamber 210 cannot be cut off. Since the liquefied gas is accommodated in the first accommodating chamber 110 and the second accommodating chamber 210, it is not convenient to remove the submersible pump 300 from the second accommodating chamber 210 for maintenance.

[0054] In the present application, by providing a plurality of submersible pumps 300 and a receiving chamber 200, when one of the submersible pumps 300 fails, the other submersible pumps 300 can operate normally and can normally extract the liquefied gas in the first receiving chamber 110 and the second receiving chamber 210. After the other submersible pumps 300 extract the liquefied gas in the first receiving chamber 110 and the second receiving chamber 210, the submersible pump 300 that failed can be taken out and repaired or replaced. In addition, when the plurality of submersible pumps 300 operate normally, the plurality of submersible pumps 300 can simultaneously extract the liquefied gas in the first receiving chamber 110 and the second receiving chamber 210 to improve the output efficiency of the liquefied gas in the first receiving chamber 110 and the second receiving chamber 210.

[0055] More specifically, two accommodating cavities 200 can be provided. The two accommodating cavities 200 are symmetrically arranged along the central axis of the tank body 100, which can maintain the balance of the entire pump storage tank device. Correspondingly, two submersible pumps 300 can be provided. The two submersible pumps 300 are symmetrically arranged along the central axis of the tank body 100.

[0056] In one embodiment, if Figure 2 As shown, the submersible pump 300 is provided with a liquid inlet 310. The liquid inlet 310 is used to allow the liquefied gas in the second accommodating chamber 210 to enter the submersible pump 300. Specifically, the liquid inlet 310 is located at the top of the submersible pump 300. The shape of the liquid inlet 310 can be circular.

[0057] More specifically, the submersible pump 300 is also provided with a liquid outlet pipe 320. The liquid outlet pipe 320 is provided at the bottom of the submersible pump 300. The liquid outlet pipe 320 is used to connect to an external liquefied gas using device. The submersible pump 300 extracts the liquefied gas in the second accommodating chamber 210, and the liquefied gas is transported to the external liquefied gas using device through the liquid outlet pipe 320. Specifically, the portion of the liquid outlet pipe 320 extending out of the accommodating chamber 200 is provided with a vacuum sleeve 321.

[0058] In the related art, a tank storage device with a pump is provided with a liquid inlet pipeline and an exhaust pipeline between the liquefied natural gas storage tank and the submersible pump skid, as well as corresponding valves, instruments, sensors, etc. for the liquid inlet pipeline and the exhaust pipeline.

[0059] In this embodiment, the tank body 100 is provided with a receiving cavity 200. The receiving cavity 200 and the tank body 100 are an integrally connected structure. The first receiving cavity 110 in the tank body 100 is connected to the second receiving cavity 210 in the receiving cavity 200. The first receiving cavity 110 and the second receiving cavity 210 are both used to accommodate liquefied gas. A submersible pump 300 is provided in the second receiving cavity 210, and the submersible pump 300 can extract the liquefied gas in the second receiving cavity 210 to the liquefied gas use equipment connected to the outside. No external pipeline and valve connection is required between the tank body 100 and the submersible pump 300, which can reduce the amount of pipeline construction and pipeline insulation engineering. At the same time, it can reduce cold leakage points, reduce the temperature rise and gasification phenomenon of liquefied gas, and reduce the emission caused by the temperature rise and overpressure of the pump storage tank device, thereby making the operation of the gas station more stable.

[0060] When liquefied natural gas is gasified in the second accommodating chamber 210, the density of natural gas is relatively small, and the natural gas can rise to the first accommodating chamber 110, and the tank body 100 has a structure of low-temperature liquefied natural gas. Therefore, the storage tank device with a pump in this embodiment does not need to be additionally provided with an exhaust pipeline. The storage tank device with a pump not only greatly reduces the cost, but also greatly shortens the on-site construction period of the gas station. In addition, the accommodating chamber 200 and the tank body 100 are an integrally connected structure, so that the storage tank device with a pump has a high degree of integration, occupies a small area, and reduces the land cost of the gas station.

[0061] In one embodiment, the connection between the first inner liner 120 and the second inner liner 220 is formed as a connecting cylinder 400. Specifically, the connecting cylinder 400 has an inlet for communicating with the first accommodating chamber, and an outlet for communicating with the second accommodating chamber. The inlet and outlet of the connecting cylinder 400 are arranged opposite to each other. The liquid inlet 310 of the submersible pump 300 is arranged opposite to the outlet of the connecting cylinder 400. The liquefied gas in the first accommodating chamber 110 flows directly into the liquid inlet 310 of the submersible pump 300 through the connecting cylinder 400 under its own weight, thereby improving the conveying efficiency of the submersible pump 300.

[0062] Specifically, the radial dimension of the connecting cylinder 400 is smaller than the radial dimension of the second accommodating cavity 210 .

[0063] It should be noted that the radial dimension of the connecting cylinder 400 should not be too large. When the radial dimension of the connecting cylinder 400 is too large, it will affect the force of the entire tank body 100. The radial dimension of the connecting cylinder 400 can meet the supply of liquefied gas from the first accommodating chamber 110 to the second accommodating chamber 210. Therefore, the radial dimension of the connecting cylinder 400 does not need to be larger than the radial dimension of the second accommodating chamber 210. In addition, the radial dimension of the second accommodating chamber 210 needs to meet the placement of the submersible pump 300.

[0064] Specifically, the radial dimension of the connecting cylinder 400 near the first inner liner 120 is smaller than the radial dimension of the connecting cylinder 400 near the second inner liner 220. More specifically, the radial dimension of the connecting cylinder 400 gradually increases from the first inner liner 120 to the second inner liner 220.

[0065] In one embodiment, if Figure 2 As shown, the connecting cylinder 400 includes an integrally formed first section 410 and a second section 420. The first section 410 is connected to the first inner liner 120. The first section 410 can be a straight cylinder structure. The radial dimensions of the first section 410 are equal. The second section 420 is connected to the second inner liner 220. The second section 420 is a truncated cone structure. The radial dimension of the second section 420 gradually increases from the first section 410 to the second inner liner 220. The liquid inlet 310 of the submersible pump 300 is located in the second section 420.

[0066] In one embodiment, if Figure 4 As shown, the pump tank device further includes a reinforcing member 500. The reinforcing member 500 is respectively connected to the first inner liner 120 and the second inner liner 220. The reinforcing member 500 is located at the periphery of the connecting cylinder 400. The reinforcing member 500 can enhance the strength of the connection between the connecting cylinder 400 and the first inner liner 120 and the second inner liner 220.

[0067] Specifically, the reinforcing member 500 is a sleeve. The sleeve may be a straight cylinder structure. The cylinder may be arranged in a vertical direction. The sleeve is sleeved on the connecting cylinder 400. Specifically, one end of the sleeve is connected to the first inner liner 120, and the other end is connected to the second inner liner 220.

[0068] Specifically, the reinforcing member 500 can be a reinforcing plate. The reinforcing plate is connected to the first inner liner 120, the connecting cylinder 400 and the second inner liner 220. The side opposite to the connecting cylinder 400 of the reinforcing plate is adapted to the outer side wall of the connecting cylinder 400. In the present embodiment, three sides of the reinforcing plate are respectively connected to the first inner liner 120, the connecting cylinder 400 and the second inner liner 220. More specifically, the reinforcing plate can be set to multiple. Multiple reinforcing plates are arranged at intervals along the outer circumference of the connecting cylinder 400, thereby further enhancing the strength of the connecting cylinder 400 being connected to the first inner liner 120 and the second inner liner 220.

[0069] In one embodiment, if Figure 3 As shown, the accommodating chamber 200 further includes a cover assembly 600. The cover assembly 600 may be a disc structure. The second liner 220 has an opening at one end away from the first liner 120. The cover assembly 600 is detachably connected to the end of the second liner 220 away from the first liner 120, and the cover assembly 600 is detachably connected to the end of the second shell 230 away from the first shell 130. The cover assembly 600 seals the opening and the second vacuum interlayer 240.

[0070] It should be noted that the top of the second inner liner 220 is integrally connected to the first inner liner 120. The submersible pump 300 cannot be removed from the top of the second inner liner 220. Therefore, an opening is provided at one end of the second inner liner 220 away from the first inner liner 120. In normal working conditions, the cover assembly 600 seals the opening and the second vacuum interlayer 240. When the submersible pump 300 in the second accommodating chamber 210 fails and needs to be repaired or replaced, the cover assembly 600 is disassembled from the second inner liner 220, and then the submersible pump 300 is removed from the second inner liner 220.

[0071] In one embodiment, if Figure 3 As shown, the cover assembly 600 includes a first cover 620. The first cover 620 is connected to one end of the second liner 220 away from the first liner 120 and one end of the second shell 230 away from the first shell 130. Specifically, the first cover 620 is welded to one end of the second liner 220 away from the first liner 120 and one end of the second shell 230 away from the first shell 130. The first cover 620 is disposed at the bottom of the second liner 220 and the second shell 230.

[0072] During the actual preparation process, the air between the second inner liner 220 and the second outer shell 230 is first evacuated to make the second inner liner 220 and the second outer shell 230 in a vacuum state, thereby forming a second vacuum interlayer 240, and then the first cover body 620 is welded to the bottom of the second inner liner 220 and the second outer shell 230, so that the first cover body 620 seals the second vacuum interlayer 240.

[0073] Specifically, the first cover body 620 may be a connecting flange. The first cover body 620 may be a circular ring structure. Figure 3 As shown, the first cover 620 is an upper flange.

[0074] In one embodiment, the cover assembly 600 further includes a second cover 630. The second cover 630 is detachably connected to the first cover 620 and seals the opening. The second cover 630 and the first cover 620 can be connected by bolts. The second cover 630 can be a connecting flange. Figure 3 As shown, the second cover body 630 is a lower flange. The second cover body 630 can be a disc structure.

[0075] It is understandable that the second cover body 630 seals the opening, and the second accommodating chamber 210 contains liquefied gas, so that the liquefied gas is in direct contact with the surface of the second cover body 630, thereby causing the liquefied gas to exchange heat with the surface of the second cover body 630 and heat up, thereby accelerating the gasification degree of the liquefied gas.

[0076] In this embodiment, if Figure 3 As shown, the storage tank device with pump further includes a heat insulation layer 631. The heat insulation layer 631 is disposed on the side of the second cover body 630 facing the submersible pump 300, so that the liquefied gas in the second accommodating chamber 210 contacts the heat insulation layer 631, and the liquefied gas is prevented from contacting the second cover body 630, thereby reducing the gasification of the liquefied gas. Specifically, the heat insulation layer 631 is laid on the side of the second cover body 630 facing the submersible pump 300.

[0077] In one embodiment, if Figure 3 As shown, the pump tank device further includes a sealing gasket 640. The sealing gasket 640 is disposed between the first cover body 620 and the second cover body 630. The sealing gasket 640 can seal the gap between the first cover body 620 and the second cover body 630 to prevent the liquefied gas in the second accommodating chamber 210 from flowing out of the gap between the first cover body 620 and the second cover body 630. Specifically, according to the sealing requirements between the first cover body 620 and the second cover body 630, a plurality of sealing gaskets 640 can be provided.

[0078] It should be noted that the first cover 620 and the second cover 630 are detachably connected, which affects the sealing between the first cover 620 and the second cover 630, thereby affecting the airtightness of the sealed opening of the second cover 630. The liquefied gas in the second accommodating chamber 210 penetrates into the gap between the first cover 620 and the second cover 630 through the gap between the thermal insulation layer 631 and the inner wall of the first cover 620, and then penetrates to the outside from the gap between the first cover 620 and the second cover 630. By providing the sealing gasket 640, the liquefied gas cannot flow to the outside from the gap between the first cover 620 and the second cover 630, which can enhance the sealing between the first cover 620 and the second cover 630, and enhance the sealing of the second cover 630 to the opening.

[0079] Specifically, the sealing gasket 640 may be a circular ring structure to match the shapes of the first cover body 620 and the second cover body 630. The sealing gasket 640 of the circular ring structure is laid on the outer periphery.

[0080] In one embodiment, if Figures 1 to 3 As shown, the storage tank device with pump further includes a heat preservation layer 610. The heat preservation layer 610 is disposed on the outer periphery of the cover assembly 600, and the heat preservation layer 610 can reduce the low-temperature loss of the liquefied gas at the cover assembly 600.

[0081] In one embodiment, the liquid outlet pipe 320 is provided through the second cover body 630 and connected to the submersible pump 300. By integrating the liquid outlet pipe 320 on the second cover body 630, the installation and removal of the liquid outlet pipe 320 can be facilitated, and there is no need to additionally provide a liquid outlet pipeline on the accommodating cavity 200, further simplifying the structure.

[0082] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in various forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A pump tank device for a gas filling station, characterized in that: include: A tank body, wherein a first accommodating chamber is provided in the tank body, the first accommodating chamber is used to accommodate liquefied gas, the tank body is provided with an accommodating chamber, the accommodating chamber and the tank body are an integrally connected structure, a second accommodating chamber is provided in the accommodating chamber, and the second accommodating chamber is communicated with the first accommodating chamber; and A submersible pump is arranged in the second accommodating chamber, and the submersible pump is provided with a liquid inlet and a liquid outlet pipe. The liquid inlet is used to supply the liquefied gas in the second accommodating chamber to enter the submersible pump, and the liquid outlet pipe is used to connect to external liquefied gas using equipment.

2. The tank device with pump according to claim 1, characterized in that: The tank body comprises a first inner liner and a first outer shell, the first accommodating cavity is arranged in the first inner liner, and a first vacuum interlayer is arranged between the first inner liner and the first outer shell; The accommodating cavity comprises a second inner liner and a second outer shell, the second accommodating cavity is arranged in the second inner liner, and a second vacuum interlayer is arranged between the second inner liner and the second outer shell; The first inner liner and the second inner liner are an integrally connected structure, the first outer shell and the second outer shell are an integrally connected structure, and the first vacuum interlayer and the second vacuum interlayer are in communication.

3. The tank device with pump according to claim 2, characterized in that: The connection between the first inner container and the second inner container is formed as a connecting cylinder, and the radial dimension of the connecting cylinder close to one end of the first inner container is smaller than the radial dimension close to one end of the second inner container.

4. The tank device with pump according to claim 3, characterized in that: The storage tank device with a pump further includes a reinforcing member, which is respectively connected to the first inner liner and the second inner liner, and the reinforcing member is located at the outer periphery of the connecting cylinder.

5. The tank device with pump according to claim 4, characterized in that: The reinforcing member is a sleeve, and the sleeve is sleeved on the connecting cylinder; or The reinforcement member is a reinforcement plate, and the reinforcement plate is connected to the first inner liner, the connecting cylinder and the second inner liner.

6. The tank device with pump according to claim 2, characterized in that: The accommodating cavity also includes a cover assembly, and the end of the second liner away from the first liner has an opening; the cover assembly is detachably connected to the end of the second liner away from the first liner, the cover assembly is detachably connected to the end of the second outer shell away from the first outer shell, and the cover assembly seals the opening and the second vacuum interlayer.

7. The tank device with pump according to claim 6, characterized in that: The storage tank device with pump also includes a heat-insulating layer, and the heat-insulating layer is arranged on the outer periphery of the cover assembly.

8. The tank device with pump according to claim 6, characterized in that: The cover assembly includes a first cover and a second cover. The first cover is connected to an end of the second liner away from the first liner and an end of the second shell away from the first shell, and seals the second vacuum interlayer. The second cover is detachably connected to the first cover and seals the opening.

9. The tank device with pump according to claim 8, characterized in that: The storage tank device with pump further comprises a heat insulation layer, and the heat insulation layer is arranged on a side of the second cover body facing the submersible pump.

10. The tank device with pump according to claim 8, characterized in that: The tank device with pump further includes a sealing gasket, which is arranged between the first cover body and the second cover body.

11. The tank device with pump according to claim 8, characterized in that: The liquid outlet pipe is arranged through the second cover body and connected to the submersible pump.

12. The tank device with pump according to claim 1, characterized in that: There are multiple accommodating cavities, and there are multiple submersible pumps. The multiple submersible pumps are correspondingly arranged in the second accommodating cavities of the multiple accommodating cavities.

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